Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1 | /* |
| 2 | * Driver for the Micron P320 SSD |
| 3 | * Copyright (C) 2011 Micron Technology, Inc. |
| 4 | * |
| 5 | * Portions of this code were derived from works subjected to the |
| 6 | * following copyright: |
| 7 | * Copyright (C) 2009 Integrated Device Technology, Inc. |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | */ |
| 20 | |
| 21 | #include <linux/pci.h> |
| 22 | #include <linux/interrupt.h> |
| 23 | #include <linux/ata.h> |
| 24 | #include <linux/delay.h> |
| 25 | #include <linux/hdreg.h> |
| 26 | #include <linux/uaccess.h> |
| 27 | #include <linux/random.h> |
| 28 | #include <linux/smp.h> |
| 29 | #include <linux/compat.h> |
| 30 | #include <linux/fs.h> |
Jens Axboe | 0e838c6 | 2011-09-28 07:35:40 -0600 | [diff] [blame] | 31 | #include <linux/module.h> |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 32 | #include <linux/genhd.h> |
| 33 | #include <linux/blkdev.h> |
| 34 | #include <linux/bio.h> |
| 35 | #include <linux/dma-mapping.h> |
| 36 | #include <linux/idr.h> |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 37 | #include <linux/kthread.h> |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 38 | #include <../drivers/ata/ahci.h> |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 39 | #include <linux/export.h> |
Asai Thambi S P | 7b421d2 | 2012-06-04 12:44:02 -0700 | [diff] [blame] | 40 | #include <linux/debugfs.h> |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 41 | #include "mtip32xx.h" |
| 42 | |
| 43 | #define HW_CMD_SLOT_SZ (MTIP_MAX_COMMAND_SLOTS * 32) |
| 44 | #define HW_CMD_TBL_SZ (AHCI_CMD_TBL_HDR_SZ + (MTIP_MAX_SG * 16)) |
| 45 | #define HW_CMD_TBL_AR_SZ (HW_CMD_TBL_SZ * MTIP_MAX_COMMAND_SLOTS) |
| 46 | #define HW_PORT_PRIV_DMA_SZ \ |
| 47 | (HW_CMD_SLOT_SZ + HW_CMD_TBL_AR_SZ + AHCI_RX_FIS_SZ) |
| 48 | |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 49 | #define HOST_CAP_NZDMA (1 << 19) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 50 | #define HOST_HSORG 0xFC |
| 51 | #define HSORG_DISABLE_SLOTGRP_INTR (1<<24) |
| 52 | #define HSORG_DISABLE_SLOTGRP_PXIS (1<<16) |
| 53 | #define HSORG_HWREV 0xFF00 |
| 54 | #define HSORG_STYLE 0x8 |
| 55 | #define HSORG_SLOTGROUPS 0x7 |
| 56 | |
| 57 | #define PORT_COMMAND_ISSUE 0x38 |
| 58 | #define PORT_SDBV 0x7C |
| 59 | |
| 60 | #define PORT_OFFSET 0x100 |
| 61 | #define PORT_MEM_SIZE 0x80 |
| 62 | |
| 63 | #define PORT_IRQ_ERR \ |
| 64 | (PORT_IRQ_HBUS_ERR | PORT_IRQ_IF_ERR | PORT_IRQ_CONNECT | \ |
| 65 | PORT_IRQ_PHYRDY | PORT_IRQ_UNK_FIS | PORT_IRQ_BAD_PMP | \ |
| 66 | PORT_IRQ_TF_ERR | PORT_IRQ_HBUS_DATA_ERR | PORT_IRQ_IF_NONFATAL | \ |
| 67 | PORT_IRQ_OVERFLOW) |
| 68 | #define PORT_IRQ_LEGACY \ |
| 69 | (PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS) |
| 70 | #define PORT_IRQ_HANDLED \ |
| 71 | (PORT_IRQ_SDB_FIS | PORT_IRQ_LEGACY | \ |
| 72 | PORT_IRQ_TF_ERR | PORT_IRQ_IF_ERR | \ |
| 73 | PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY) |
| 74 | #define DEF_PORT_IRQ \ |
| 75 | (PORT_IRQ_ERR | PORT_IRQ_LEGACY | PORT_IRQ_SDB_FIS) |
| 76 | |
| 77 | /* product numbers */ |
| 78 | #define MTIP_PRODUCT_UNKNOWN 0x00 |
| 79 | #define MTIP_PRODUCT_ASICFPGA 0x11 |
| 80 | |
| 81 | /* Device instance number, incremented each time a device is probed. */ |
| 82 | static int instance; |
| 83 | |
| 84 | /* |
| 85 | * Global variable used to hold the major block device number |
| 86 | * allocated in mtip_init(). |
| 87 | */ |
Jens Axboe | 3ff147d | 2011-09-27 21:33:53 -0600 | [diff] [blame] | 88 | static int mtip_major; |
Asai Thambi S P | 7b421d2 | 2012-06-04 12:44:02 -0700 | [diff] [blame] | 89 | static struct dentry *dfs_parent; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 90 | |
| 91 | static DEFINE_SPINLOCK(rssd_index_lock); |
| 92 | static DEFINE_IDA(rssd_index_ida); |
| 93 | |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 94 | static int mtip_block_initialize(struct driver_data *dd); |
| 95 | |
Jens Axboe | 16d02c0 | 2011-09-27 15:50:01 -0600 | [diff] [blame] | 96 | #ifdef CONFIG_COMPAT |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 97 | struct mtip_compat_ide_task_request_s { |
| 98 | __u8 io_ports[8]; |
| 99 | __u8 hob_ports[8]; |
| 100 | ide_reg_valid_t out_flags; |
| 101 | ide_reg_valid_t in_flags; |
| 102 | int data_phase; |
| 103 | int req_cmd; |
| 104 | compat_ulong_t out_size; |
| 105 | compat_ulong_t in_size; |
| 106 | }; |
Jens Axboe | 16d02c0 | 2011-09-27 15:50:01 -0600 | [diff] [blame] | 107 | #endif |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 108 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 109 | /* |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 110 | * This function check_for_surprise_removal is called |
| 111 | * while card is removed from the system and it will |
| 112 | * read the vendor id from the configration space |
| 113 | * |
| 114 | * @pdev Pointer to the pci_dev structure. |
| 115 | * |
| 116 | * return value |
| 117 | * true if device removed, else false |
| 118 | */ |
| 119 | static bool mtip_check_surprise_removal(struct pci_dev *pdev) |
| 120 | { |
| 121 | u16 vendor_id = 0; |
| 122 | |
| 123 | /* Read the vendorID from the configuration space */ |
| 124 | pci_read_config_word(pdev, 0x00, &vendor_id); |
| 125 | if (vendor_id == 0xFFFF) |
| 126 | return true; /* device removed */ |
| 127 | |
| 128 | return false; /* device present */ |
| 129 | } |
| 130 | |
| 131 | /* |
| 132 | * This function is called for clean the pending command in the |
| 133 | * command slot during the surprise removal of device and return |
| 134 | * error to the upper layer. |
| 135 | * |
| 136 | * @dd Pointer to the DRIVER_DATA structure. |
| 137 | * |
| 138 | * return value |
| 139 | * None |
| 140 | */ |
| 141 | static void mtip_command_cleanup(struct driver_data *dd) |
| 142 | { |
| 143 | int group = 0, commandslot = 0, commandindex = 0; |
| 144 | struct mtip_cmd *command; |
| 145 | struct mtip_port *port = dd->port; |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 146 | static int in_progress; |
| 147 | |
| 148 | if (in_progress) |
| 149 | return; |
| 150 | |
| 151 | in_progress = 1; |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 152 | |
| 153 | for (group = 0; group < 4; group++) { |
| 154 | for (commandslot = 0; commandslot < 32; commandslot++) { |
| 155 | if (!(port->allocated[group] & (1 << commandslot))) |
| 156 | continue; |
| 157 | |
| 158 | commandindex = group << 5 | commandslot; |
| 159 | command = &port->commands[commandindex]; |
| 160 | |
| 161 | if (atomic_read(&command->active) |
| 162 | && (command->async_callback)) { |
| 163 | command->async_callback(command->async_data, |
| 164 | -ENODEV); |
| 165 | command->async_callback = NULL; |
| 166 | command->async_data = NULL; |
| 167 | } |
| 168 | |
| 169 | dma_unmap_sg(&port->dd->pdev->dev, |
| 170 | command->sg, |
| 171 | command->scatter_ents, |
| 172 | command->direction); |
| 173 | } |
| 174 | } |
| 175 | |
| 176 | up(&port->cmd_slot); |
| 177 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 178 | set_bit(MTIP_DDF_CLEANUP_BIT, &dd->dd_flag); |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 179 | in_progress = 0; |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 180 | } |
| 181 | |
| 182 | /* |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 183 | * Obtain an empty command slot. |
| 184 | * |
| 185 | * This function needs to be reentrant since it could be called |
| 186 | * at the same time on multiple CPUs. The allocation of the |
| 187 | * command slot must be atomic. |
| 188 | * |
| 189 | * @port Pointer to the port data structure. |
| 190 | * |
| 191 | * return value |
| 192 | * >= 0 Index of command slot obtained. |
| 193 | * -1 No command slots available. |
| 194 | */ |
| 195 | static int get_slot(struct mtip_port *port) |
| 196 | { |
| 197 | int slot, i; |
| 198 | unsigned int num_command_slots = port->dd->slot_groups * 32; |
| 199 | |
| 200 | /* |
| 201 | * Try 10 times, because there is a small race here. |
| 202 | * that's ok, because it's still cheaper than a lock. |
| 203 | * |
| 204 | * Race: Since this section is not protected by lock, same bit |
| 205 | * could be chosen by different process contexts running in |
| 206 | * different processor. So instead of costly lock, we are going |
| 207 | * with loop. |
| 208 | */ |
| 209 | for (i = 0; i < 10; i++) { |
| 210 | slot = find_next_zero_bit(port->allocated, |
| 211 | num_command_slots, 1); |
| 212 | if ((slot < num_command_slots) && |
| 213 | (!test_and_set_bit(slot, port->allocated))) |
| 214 | return slot; |
| 215 | } |
| 216 | dev_warn(&port->dd->pdev->dev, "Failed to get a tag.\n"); |
| 217 | |
| 218 | if (mtip_check_surprise_removal(port->dd->pdev)) { |
| 219 | /* Device not present, clean outstanding commands */ |
| 220 | mtip_command_cleanup(port->dd); |
| 221 | } |
| 222 | return -1; |
| 223 | } |
| 224 | |
| 225 | /* |
| 226 | * Release a command slot. |
| 227 | * |
| 228 | * @port Pointer to the port data structure. |
| 229 | * @tag Tag of command to release |
| 230 | * |
| 231 | * return value |
| 232 | * None |
| 233 | */ |
| 234 | static inline void release_slot(struct mtip_port *port, int tag) |
| 235 | { |
| 236 | smp_mb__before_clear_bit(); |
| 237 | clear_bit(tag, port->allocated); |
| 238 | smp_mb__after_clear_bit(); |
| 239 | } |
| 240 | |
| 241 | /* |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 242 | * Reset the HBA (without sleeping) |
| 243 | * |
| 244 | * Just like hba_reset, except does not call sleep, so can be |
| 245 | * run from interrupt/tasklet context. |
| 246 | * |
| 247 | * @dd Pointer to the driver data structure. |
| 248 | * |
| 249 | * return value |
| 250 | * 0 The reset was successful. |
| 251 | * -1 The HBA Reset bit did not clear. |
| 252 | */ |
| 253 | static int hba_reset_nosleep(struct driver_data *dd) |
| 254 | { |
| 255 | unsigned long timeout; |
| 256 | |
| 257 | /* Chip quirk: quiesce any chip function */ |
| 258 | mdelay(10); |
| 259 | |
| 260 | /* Set the reset bit */ |
| 261 | writel(HOST_RESET, dd->mmio + HOST_CTL); |
| 262 | |
| 263 | /* Flush */ |
| 264 | readl(dd->mmio + HOST_CTL); |
| 265 | |
| 266 | /* |
| 267 | * Wait 10ms then spin for up to 1 second |
| 268 | * waiting for reset acknowledgement |
| 269 | */ |
| 270 | timeout = jiffies + msecs_to_jiffies(1000); |
| 271 | mdelay(10); |
| 272 | while ((readl(dd->mmio + HOST_CTL) & HOST_RESET) |
| 273 | && time_before(jiffies, timeout)) |
| 274 | mdelay(1); |
| 275 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 276 | if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)) |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 277 | return -1; |
| 278 | |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 279 | if (readl(dd->mmio + HOST_CTL) & HOST_RESET) |
| 280 | return -1; |
| 281 | |
| 282 | return 0; |
| 283 | } |
| 284 | |
| 285 | /* |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 286 | * Issue a command to the hardware. |
| 287 | * |
| 288 | * Set the appropriate bit in the s_active and Command Issue hardware |
| 289 | * registers, causing hardware command processing to begin. |
| 290 | * |
| 291 | * @port Pointer to the port structure. |
| 292 | * @tag The tag of the command to be issued. |
| 293 | * |
| 294 | * return value |
| 295 | * None |
| 296 | */ |
| 297 | static inline void mtip_issue_ncq_command(struct mtip_port *port, int tag) |
| 298 | { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 299 | atomic_set(&port->commands[tag].active, 1); |
| 300 | |
Asai Thambi S P | 0a07ab2 | 2012-05-29 18:43:16 -0700 | [diff] [blame] | 301 | spin_lock(&port->cmd_issue_lock); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 302 | |
| 303 | writel((1 << MTIP_TAG_BIT(tag)), |
| 304 | port->s_active[MTIP_TAG_INDEX(tag)]); |
| 305 | writel((1 << MTIP_TAG_BIT(tag)), |
| 306 | port->cmd_issue[MTIP_TAG_INDEX(tag)]); |
| 307 | |
Asai Thambi S P | 0a07ab2 | 2012-05-29 18:43:16 -0700 | [diff] [blame] | 308 | spin_unlock(&port->cmd_issue_lock); |
Asai Thambi S P | dad40f1 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 309 | |
| 310 | /* Set the command's timeout value.*/ |
| 311 | port->commands[tag].comp_time = jiffies + msecs_to_jiffies( |
| 312 | MTIP_NCQ_COMMAND_TIMEOUT_MS); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 313 | } |
| 314 | |
| 315 | /* |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 316 | * Enable/disable the reception of FIS |
| 317 | * |
| 318 | * @port Pointer to the port data structure |
| 319 | * @enable 1 to enable, 0 to disable |
| 320 | * |
| 321 | * return value |
| 322 | * Previous state: 1 enabled, 0 disabled |
| 323 | */ |
| 324 | static int mtip_enable_fis(struct mtip_port *port, int enable) |
| 325 | { |
| 326 | u32 tmp; |
| 327 | |
| 328 | /* enable FIS reception */ |
| 329 | tmp = readl(port->mmio + PORT_CMD); |
| 330 | if (enable) |
| 331 | writel(tmp | PORT_CMD_FIS_RX, port->mmio + PORT_CMD); |
| 332 | else |
| 333 | writel(tmp & ~PORT_CMD_FIS_RX, port->mmio + PORT_CMD); |
| 334 | |
| 335 | /* Flush */ |
| 336 | readl(port->mmio + PORT_CMD); |
| 337 | |
| 338 | return (((tmp & PORT_CMD_FIS_RX) == PORT_CMD_FIS_RX)); |
| 339 | } |
| 340 | |
| 341 | /* |
| 342 | * Enable/disable the DMA engine |
| 343 | * |
| 344 | * @port Pointer to the port data structure |
| 345 | * @enable 1 to enable, 0 to disable |
| 346 | * |
| 347 | * return value |
| 348 | * Previous state: 1 enabled, 0 disabled. |
| 349 | */ |
| 350 | static int mtip_enable_engine(struct mtip_port *port, int enable) |
| 351 | { |
| 352 | u32 tmp; |
| 353 | |
| 354 | /* enable FIS reception */ |
| 355 | tmp = readl(port->mmio + PORT_CMD); |
| 356 | if (enable) |
| 357 | writel(tmp | PORT_CMD_START, port->mmio + PORT_CMD); |
| 358 | else |
| 359 | writel(tmp & ~PORT_CMD_START, port->mmio + PORT_CMD); |
| 360 | |
| 361 | readl(port->mmio + PORT_CMD); |
| 362 | return (((tmp & PORT_CMD_START) == PORT_CMD_START)); |
| 363 | } |
| 364 | |
| 365 | /* |
| 366 | * Enables the port DMA engine and FIS reception. |
| 367 | * |
| 368 | * return value |
| 369 | * None |
| 370 | */ |
| 371 | static inline void mtip_start_port(struct mtip_port *port) |
| 372 | { |
| 373 | /* Enable FIS reception */ |
| 374 | mtip_enable_fis(port, 1); |
| 375 | |
| 376 | /* Enable the DMA engine */ |
| 377 | mtip_enable_engine(port, 1); |
| 378 | } |
| 379 | |
| 380 | /* |
| 381 | * Deinitialize a port by disabling port interrupts, the DMA engine, |
| 382 | * and FIS reception. |
| 383 | * |
| 384 | * @port Pointer to the port structure |
| 385 | * |
| 386 | * return value |
| 387 | * None |
| 388 | */ |
| 389 | static inline void mtip_deinit_port(struct mtip_port *port) |
| 390 | { |
| 391 | /* Disable interrupts on this port */ |
| 392 | writel(0, port->mmio + PORT_IRQ_MASK); |
| 393 | |
| 394 | /* Disable the DMA engine */ |
| 395 | mtip_enable_engine(port, 0); |
| 396 | |
| 397 | /* Disable FIS reception */ |
| 398 | mtip_enable_fis(port, 0); |
| 399 | } |
| 400 | |
| 401 | /* |
| 402 | * Initialize a port. |
| 403 | * |
| 404 | * This function deinitializes the port by calling mtip_deinit_port() and |
| 405 | * then initializes it by setting the command header and RX FIS addresses, |
| 406 | * clearing the SError register and any pending port interrupts before |
| 407 | * re-enabling the default set of port interrupts. |
| 408 | * |
| 409 | * @port Pointer to the port structure. |
| 410 | * |
| 411 | * return value |
| 412 | * None |
| 413 | */ |
| 414 | static void mtip_init_port(struct mtip_port *port) |
| 415 | { |
| 416 | int i; |
| 417 | mtip_deinit_port(port); |
| 418 | |
| 419 | /* Program the command list base and FIS base addresses */ |
| 420 | if (readl(port->dd->mmio + HOST_CAP) & HOST_CAP_64) { |
| 421 | writel((port->command_list_dma >> 16) >> 16, |
| 422 | port->mmio + PORT_LST_ADDR_HI); |
| 423 | writel((port->rxfis_dma >> 16) >> 16, |
| 424 | port->mmio + PORT_FIS_ADDR_HI); |
| 425 | } |
| 426 | |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 427 | writel(port->command_list_dma & 0xFFFFFFFF, |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 428 | port->mmio + PORT_LST_ADDR); |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 429 | writel(port->rxfis_dma & 0xFFFFFFFF, port->mmio + PORT_FIS_ADDR); |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 430 | |
| 431 | /* Clear SError */ |
| 432 | writel(readl(port->mmio + PORT_SCR_ERR), port->mmio + PORT_SCR_ERR); |
| 433 | |
| 434 | /* reset the completed registers.*/ |
| 435 | for (i = 0; i < port->dd->slot_groups; i++) |
| 436 | writel(0xFFFFFFFF, port->completed[i]); |
| 437 | |
| 438 | /* Clear any pending interrupts for this port */ |
Asai Thambi S P | 6bb688c | 2012-05-29 18:40:45 -0700 | [diff] [blame] | 439 | writel(readl(port->mmio + PORT_IRQ_STAT), port->mmio + PORT_IRQ_STAT); |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 440 | |
Asai Thambi S P | 22be2e6 | 2012-03-23 12:33:03 +0100 | [diff] [blame] | 441 | /* Clear any pending interrupts on the HBA. */ |
| 442 | writel(readl(port->dd->mmio + HOST_IRQ_STAT), |
| 443 | port->dd->mmio + HOST_IRQ_STAT); |
| 444 | |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 445 | /* Enable port interrupts */ |
| 446 | writel(DEF_PORT_IRQ, port->mmio + PORT_IRQ_MASK); |
| 447 | } |
| 448 | |
| 449 | /* |
| 450 | * Restart a port |
| 451 | * |
| 452 | * @port Pointer to the port data structure. |
| 453 | * |
| 454 | * return value |
| 455 | * None |
| 456 | */ |
| 457 | static void mtip_restart_port(struct mtip_port *port) |
| 458 | { |
| 459 | unsigned long timeout; |
| 460 | |
| 461 | /* Disable the DMA engine */ |
| 462 | mtip_enable_engine(port, 0); |
| 463 | |
| 464 | /* Chip quirk: wait up to 500ms for PxCMD.CR == 0 */ |
| 465 | timeout = jiffies + msecs_to_jiffies(500); |
| 466 | while ((readl(port->mmio + PORT_CMD) & PORT_CMD_LIST_ON) |
| 467 | && time_before(jiffies, timeout)) |
| 468 | ; |
| 469 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 470 | if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag)) |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 471 | return; |
| 472 | |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 473 | /* |
| 474 | * Chip quirk: escalate to hba reset if |
| 475 | * PxCMD.CR not clear after 500 ms |
| 476 | */ |
| 477 | if (readl(port->mmio + PORT_CMD) & PORT_CMD_LIST_ON) { |
| 478 | dev_warn(&port->dd->pdev->dev, |
| 479 | "PxCMD.CR not clear, escalating reset\n"); |
| 480 | |
| 481 | if (hba_reset_nosleep(port->dd)) |
| 482 | dev_err(&port->dd->pdev->dev, |
| 483 | "HBA reset escalation failed.\n"); |
| 484 | |
| 485 | /* 30 ms delay before com reset to quiesce chip */ |
| 486 | mdelay(30); |
| 487 | } |
| 488 | |
| 489 | dev_warn(&port->dd->pdev->dev, "Issuing COM reset\n"); |
| 490 | |
| 491 | /* Set PxSCTL.DET */ |
| 492 | writel(readl(port->mmio + PORT_SCR_CTL) | |
| 493 | 1, port->mmio + PORT_SCR_CTL); |
| 494 | readl(port->mmio + PORT_SCR_CTL); |
| 495 | |
| 496 | /* Wait 1 ms to quiesce chip function */ |
| 497 | timeout = jiffies + msecs_to_jiffies(1); |
| 498 | while (time_before(jiffies, timeout)) |
| 499 | ; |
| 500 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 501 | if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag)) |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 502 | return; |
| 503 | |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 504 | /* Clear PxSCTL.DET */ |
| 505 | writel(readl(port->mmio + PORT_SCR_CTL) & ~1, |
| 506 | port->mmio + PORT_SCR_CTL); |
| 507 | readl(port->mmio + PORT_SCR_CTL); |
| 508 | |
| 509 | /* Wait 500 ms for bit 0 of PORT_SCR_STS to be set */ |
| 510 | timeout = jiffies + msecs_to_jiffies(500); |
| 511 | while (((readl(port->mmio + PORT_SCR_STAT) & 0x01) == 0) |
| 512 | && time_before(jiffies, timeout)) |
| 513 | ; |
| 514 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 515 | if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag)) |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 516 | return; |
| 517 | |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 518 | if ((readl(port->mmio + PORT_SCR_STAT) & 0x01) == 0) |
| 519 | dev_warn(&port->dd->pdev->dev, |
| 520 | "COM reset failed\n"); |
| 521 | |
Asai Thambi S P | 22be2e6 | 2012-03-23 12:33:03 +0100 | [diff] [blame] | 522 | mtip_init_port(port); |
| 523 | mtip_start_port(port); |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 524 | |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 525 | } |
| 526 | |
| 527 | /* |
Asai Thambi S P | 95fea2f | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 528 | * Helper function for tag logging |
| 529 | */ |
| 530 | static void print_tags(struct driver_data *dd, |
| 531 | char *msg, |
| 532 | unsigned long *tagbits, |
| 533 | int cnt) |
| 534 | { |
| 535 | unsigned char tagmap[128]; |
| 536 | int group, tagmap_len = 0; |
| 537 | |
| 538 | memset(tagmap, 0, sizeof(tagmap)); |
| 539 | for (group = SLOTBITS_IN_LONGS; group > 0; group--) |
| 540 | tagmap_len = sprintf(tagmap + tagmap_len, "%016lX ", |
| 541 | tagbits[group-1]); |
| 542 | dev_warn(&dd->pdev->dev, |
| 543 | "%d command(s) %s: tagmap [%s]", cnt, msg, tagmap); |
| 544 | } |
| 545 | |
| 546 | /* |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 547 | * Called periodically to see if any read/write commands are |
| 548 | * taking too long to complete. |
| 549 | * |
| 550 | * @data Pointer to the PORT data structure. |
| 551 | * |
| 552 | * return value |
| 553 | * None |
| 554 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 555 | static void mtip_timeout_function(unsigned long int data) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 556 | { |
| 557 | struct mtip_port *port = (struct mtip_port *) data; |
| 558 | struct host_to_dev_fis *fis; |
| 559 | struct mtip_cmd *command; |
| 560 | int tag, cmdto_cnt = 0; |
| 561 | unsigned int bit, group; |
| 562 | unsigned int num_command_slots = port->dd->slot_groups * 32; |
Asai Thambi S P | 95fea2f | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 563 | unsigned long to, tagaccum[SLOTBITS_IN_LONGS]; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 564 | |
| 565 | if (unlikely(!port)) |
| 566 | return; |
| 567 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 568 | if (test_bit(MTIP_DDF_RESUME_BIT, &port->dd->dd_flag)) { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 569 | mod_timer(&port->cmd_timer, |
| 570 | jiffies + msecs_to_jiffies(30000)); |
| 571 | return; |
| 572 | } |
Asai Thambi S P | 95fea2f | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 573 | /* clear the tag accumulator */ |
| 574 | memset(tagaccum, 0, SLOTBITS_IN_LONGS * sizeof(long)); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 575 | |
| 576 | for (tag = 0; tag < num_command_slots; tag++) { |
| 577 | /* |
| 578 | * Skip internal command slot as it has |
| 579 | * its own timeout mechanism |
| 580 | */ |
| 581 | if (tag == MTIP_TAG_INTERNAL) |
| 582 | continue; |
| 583 | |
| 584 | if (atomic_read(&port->commands[tag].active) && |
| 585 | (time_after(jiffies, port->commands[tag].comp_time))) { |
| 586 | group = tag >> 5; |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 587 | bit = tag & 0x1F; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 588 | |
| 589 | command = &port->commands[tag]; |
| 590 | fis = (struct host_to_dev_fis *) command->command; |
| 591 | |
Asai Thambi S P | 95fea2f | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 592 | set_bit(tag, tagaccum); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 593 | cmdto_cnt++; |
| 594 | if (cmdto_cnt == 1) |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 595 | set_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 596 | |
| 597 | /* |
| 598 | * Clear the completed bit. This should prevent |
| 599 | * any interrupt handlers from trying to retire |
| 600 | * the command. |
| 601 | */ |
| 602 | writel(1 << bit, port->completed[group]); |
| 603 | |
| 604 | /* Call the async completion callback. */ |
| 605 | if (likely(command->async_callback)) |
| 606 | command->async_callback(command->async_data, |
| 607 | -EIO); |
| 608 | command->async_callback = NULL; |
| 609 | command->comp_func = NULL; |
| 610 | |
| 611 | /* Unmap the DMA scatter list entries */ |
| 612 | dma_unmap_sg(&port->dd->pdev->dev, |
| 613 | command->sg, |
| 614 | command->scatter_ents, |
| 615 | command->direction); |
| 616 | |
| 617 | /* |
| 618 | * Clear the allocated bit and active tag for the |
| 619 | * command. |
| 620 | */ |
| 621 | atomic_set(&port->commands[tag].active, 0); |
| 622 | release_slot(port, tag); |
| 623 | |
| 624 | up(&port->cmd_slot); |
| 625 | } |
| 626 | } |
| 627 | |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 628 | if (cmdto_cnt && !test_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags)) { |
Asai Thambi S P | 95fea2f | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 629 | print_tags(port->dd, "timed out", tagaccum, cmdto_cnt); |
| 630 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 631 | mtip_restart_port(port); |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 632 | clear_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags); |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 633 | wake_up_interruptible(&port->svc_wait); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 634 | } |
| 635 | |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 636 | if (port->ic_pause_timer) { |
| 637 | to = port->ic_pause_timer + msecs_to_jiffies(1000); |
| 638 | if (time_after(jiffies, to)) { |
| 639 | if (!test_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags)) { |
| 640 | port->ic_pause_timer = 0; |
| 641 | clear_bit(MTIP_PF_SE_ACTIVE_BIT, &port->flags); |
| 642 | clear_bit(MTIP_PF_DM_ACTIVE_BIT, &port->flags); |
| 643 | clear_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags); |
| 644 | wake_up_interruptible(&port->svc_wait); |
| 645 | } |
| 646 | |
| 647 | |
| 648 | } |
| 649 | } |
| 650 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 651 | /* Restart the timer */ |
| 652 | mod_timer(&port->cmd_timer, |
| 653 | jiffies + msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD)); |
| 654 | } |
| 655 | |
| 656 | /* |
| 657 | * IO completion function. |
| 658 | * |
| 659 | * This completion function is called by the driver ISR when a |
| 660 | * command that was issued by the kernel completes. It first calls the |
| 661 | * asynchronous completion function which normally calls back into the block |
| 662 | * layer passing the asynchronous callback data, then unmaps the |
| 663 | * scatter list associated with the completed command, and finally |
| 664 | * clears the allocated bit associated with the completed command. |
| 665 | * |
| 666 | * @port Pointer to the port data structure. |
| 667 | * @tag Tag of the command. |
| 668 | * @data Pointer to driver_data. |
| 669 | * @status Completion status. |
| 670 | * |
| 671 | * return value |
| 672 | * None |
| 673 | */ |
| 674 | static void mtip_async_complete(struct mtip_port *port, |
| 675 | int tag, |
| 676 | void *data, |
| 677 | int status) |
| 678 | { |
| 679 | struct mtip_cmd *command; |
| 680 | struct driver_data *dd = data; |
| 681 | int cb_status = status ? -EIO : 0; |
| 682 | |
| 683 | if (unlikely(!dd) || unlikely(!port)) |
| 684 | return; |
| 685 | |
| 686 | command = &port->commands[tag]; |
| 687 | |
| 688 | if (unlikely(status == PORT_IRQ_TF_ERR)) { |
| 689 | dev_warn(&port->dd->pdev->dev, |
| 690 | "Command tag %d failed due to TFE\n", tag); |
| 691 | } |
| 692 | |
| 693 | /* Upper layer callback */ |
| 694 | if (likely(command->async_callback)) |
| 695 | command->async_callback(command->async_data, cb_status); |
| 696 | |
| 697 | command->async_callback = NULL; |
| 698 | command->comp_func = NULL; |
| 699 | |
| 700 | /* Unmap the DMA scatter list entries */ |
| 701 | dma_unmap_sg(&dd->pdev->dev, |
| 702 | command->sg, |
| 703 | command->scatter_ents, |
| 704 | command->direction); |
| 705 | |
| 706 | /* Clear the allocated and active bits for the command */ |
| 707 | atomic_set(&port->commands[tag].active, 0); |
| 708 | release_slot(port, tag); |
| 709 | |
| 710 | up(&port->cmd_slot); |
| 711 | } |
| 712 | |
| 713 | /* |
| 714 | * Internal command completion callback function. |
| 715 | * |
| 716 | * This function is normally called by the driver ISR when an internal |
| 717 | * command completed. This function signals the command completion by |
| 718 | * calling complete(). |
| 719 | * |
| 720 | * @port Pointer to the port data structure. |
| 721 | * @tag Tag of the command that has completed. |
| 722 | * @data Pointer to a completion structure. |
| 723 | * @status Completion status. |
| 724 | * |
| 725 | * return value |
| 726 | * None |
| 727 | */ |
| 728 | static void mtip_completion(struct mtip_port *port, |
| 729 | int tag, |
| 730 | void *data, |
| 731 | int status) |
| 732 | { |
| 733 | struct mtip_cmd *command = &port->commands[tag]; |
| 734 | struct completion *waiting = data; |
| 735 | if (unlikely(status == PORT_IRQ_TF_ERR)) |
| 736 | dev_warn(&port->dd->pdev->dev, |
| 737 | "Internal command %d completed with TFE\n", tag); |
| 738 | |
| 739 | command->async_callback = NULL; |
| 740 | command->comp_func = NULL; |
| 741 | |
| 742 | complete(waiting); |
| 743 | } |
| 744 | |
Asai Thambi S P | 8182b49 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 745 | static void mtip_null_completion(struct mtip_port *port, |
| 746 | int tag, |
| 747 | void *data, |
| 748 | int status) |
| 749 | { |
| 750 | return; |
| 751 | } |
| 752 | |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 753 | static int mtip_read_log_page(struct mtip_port *port, u8 page, u16 *buffer, |
| 754 | dma_addr_t buffer_dma, unsigned int sectors); |
| 755 | static int mtip_get_smart_attr(struct mtip_port *port, unsigned int id, |
| 756 | struct smart_attr *attrib); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 757 | /* |
| 758 | * Handle an error. |
| 759 | * |
| 760 | * @dd Pointer to the DRIVER_DATA structure. |
| 761 | * |
| 762 | * return value |
| 763 | * None |
| 764 | */ |
| 765 | static void mtip_handle_tfe(struct driver_data *dd) |
| 766 | { |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 767 | int group, tag, bit, reissue, rv; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 768 | struct mtip_port *port; |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 769 | struct mtip_cmd *cmd; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 770 | u32 completed; |
| 771 | struct host_to_dev_fis *fis; |
| 772 | unsigned long tagaccum[SLOTBITS_IN_LONGS]; |
Asai Thambi S P | 95fea2f | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 773 | unsigned int cmd_cnt = 0; |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 774 | unsigned char *buf; |
| 775 | char *fail_reason = NULL; |
| 776 | int fail_all_ncq_write = 0, fail_all_ncq_cmds = 0; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 777 | |
| 778 | dev_warn(&dd->pdev->dev, "Taskfile error\n"); |
| 779 | |
| 780 | port = dd->port; |
| 781 | |
| 782 | /* Stop the timer to prevent command timeouts. */ |
| 783 | del_timer(&port->cmd_timer); |
Asai Thambi S P | d02e1f0 | 2012-05-29 18:42:27 -0700 | [diff] [blame] | 784 | set_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags); |
| 785 | |
| 786 | if (test_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags) && |
| 787 | test_bit(MTIP_TAG_INTERNAL, port->allocated)) { |
| 788 | cmd = &port->commands[MTIP_TAG_INTERNAL]; |
| 789 | dbg_printk(MTIP_DRV_NAME " TFE for the internal command\n"); |
| 790 | |
| 791 | atomic_inc(&cmd->active); /* active > 1 indicates error */ |
| 792 | if (cmd->comp_data && cmd->comp_func) { |
| 793 | cmd->comp_func(port, MTIP_TAG_INTERNAL, |
| 794 | cmd->comp_data, PORT_IRQ_TF_ERR); |
| 795 | } |
| 796 | goto handle_tfe_exit; |
| 797 | } |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 798 | |
Asai Thambi S P | 95fea2f | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 799 | /* clear the tag accumulator */ |
| 800 | memset(tagaccum, 0, SLOTBITS_IN_LONGS * sizeof(long)); |
| 801 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 802 | /* Loop through all the groups */ |
| 803 | for (group = 0; group < dd->slot_groups; group++) { |
| 804 | completed = readl(port->completed[group]); |
| 805 | |
| 806 | /* clear completed status register in the hardware.*/ |
| 807 | writel(completed, port->completed[group]); |
| 808 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 809 | /* Process successfully completed commands */ |
| 810 | for (bit = 0; bit < 32 && completed; bit++) { |
| 811 | if (!(completed & (1<<bit))) |
| 812 | continue; |
| 813 | tag = (group << 5) + bit; |
| 814 | |
| 815 | /* Skip the internal command slot */ |
| 816 | if (tag == MTIP_TAG_INTERNAL) |
| 817 | continue; |
| 818 | |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 819 | cmd = &port->commands[tag]; |
| 820 | if (likely(cmd->comp_func)) { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 821 | set_bit(tag, tagaccum); |
Asai Thambi S P | 95fea2f | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 822 | cmd_cnt++; |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 823 | atomic_set(&cmd->active, 0); |
| 824 | cmd->comp_func(port, |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 825 | tag, |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 826 | cmd->comp_data, |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 827 | 0); |
| 828 | } else { |
| 829 | dev_err(&port->dd->pdev->dev, |
| 830 | "Missing completion func for tag %d", |
| 831 | tag); |
| 832 | if (mtip_check_surprise_removal(dd->pdev)) { |
| 833 | mtip_command_cleanup(dd); |
| 834 | /* don't proceed further */ |
| 835 | return; |
| 836 | } |
| 837 | } |
| 838 | } |
| 839 | } |
Asai Thambi S P | 95fea2f | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 840 | |
| 841 | print_tags(dd, "completed (TFE)", tagaccum, cmd_cnt); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 842 | |
| 843 | /* Restart the port */ |
| 844 | mdelay(20); |
| 845 | mtip_restart_port(port); |
| 846 | |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 847 | /* Trying to determine the cause of the error */ |
| 848 | rv = mtip_read_log_page(dd->port, ATA_LOG_SATA_NCQ, |
| 849 | dd->port->log_buf, |
| 850 | dd->port->log_buf_dma, 1); |
| 851 | if (rv) { |
| 852 | dev_warn(&dd->pdev->dev, |
| 853 | "Error in READ LOG EXT (10h) command\n"); |
| 854 | /* non-critical error, don't fail the load */ |
| 855 | } else { |
| 856 | buf = (unsigned char *)dd->port->log_buf; |
| 857 | if (buf[259] & 0x1) { |
| 858 | dev_info(&dd->pdev->dev, |
| 859 | "Write protect bit is set.\n"); |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 860 | set_bit(MTIP_DDF_WRITE_PROTECT_BIT, &dd->dd_flag); |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 861 | fail_all_ncq_write = 1; |
| 862 | fail_reason = "write protect"; |
| 863 | } |
| 864 | if (buf[288] == 0xF7) { |
| 865 | dev_info(&dd->pdev->dev, |
| 866 | "Exceeded Tmax, drive in thermal shutdown.\n"); |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 867 | set_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag); |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 868 | fail_all_ncq_cmds = 1; |
| 869 | fail_reason = "thermal shutdown"; |
| 870 | } |
| 871 | if (buf[288] == 0xBF) { |
| 872 | dev_info(&dd->pdev->dev, |
| 873 | "Drive indicates rebuild has failed.\n"); |
| 874 | fail_all_ncq_cmds = 1; |
| 875 | fail_reason = "rebuild failed"; |
| 876 | } |
| 877 | } |
| 878 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 879 | /* clear the tag accumulator */ |
| 880 | memset(tagaccum, 0, SLOTBITS_IN_LONGS * sizeof(long)); |
| 881 | |
| 882 | /* Loop through all the groups */ |
| 883 | for (group = 0; group < dd->slot_groups; group++) { |
| 884 | for (bit = 0; bit < 32; bit++) { |
| 885 | reissue = 1; |
| 886 | tag = (group << 5) + bit; |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 887 | cmd = &port->commands[tag]; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 888 | |
| 889 | /* If the active bit is set re-issue the command */ |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 890 | if (atomic_read(&cmd->active) == 0) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 891 | continue; |
| 892 | |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 893 | fis = (struct host_to_dev_fis *)cmd->command; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 894 | |
| 895 | /* Should re-issue? */ |
| 896 | if (tag == MTIP_TAG_INTERNAL || |
| 897 | fis->command == ATA_CMD_SET_FEATURES) |
| 898 | reissue = 0; |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 899 | else { |
| 900 | if (fail_all_ncq_cmds || |
| 901 | (fail_all_ncq_write && |
| 902 | fis->command == ATA_CMD_FPDMA_WRITE)) { |
| 903 | dev_warn(&dd->pdev->dev, |
| 904 | " Fail: %s w/tag %d [%s].\n", |
| 905 | fis->command == ATA_CMD_FPDMA_WRITE ? |
| 906 | "write" : "read", |
| 907 | tag, |
| 908 | fail_reason != NULL ? |
| 909 | fail_reason : "unknown"); |
| 910 | atomic_set(&cmd->active, 0); |
| 911 | if (cmd->comp_func) { |
| 912 | cmd->comp_func(port, tag, |
| 913 | cmd->comp_data, |
| 914 | -ENODATA); |
| 915 | } |
| 916 | continue; |
| 917 | } |
| 918 | } |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 919 | |
| 920 | /* |
| 921 | * First check if this command has |
| 922 | * exceeded its retries. |
| 923 | */ |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 924 | if (reissue && (cmd->retries-- > 0)) { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 925 | |
| 926 | set_bit(tag, tagaccum); |
| 927 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 928 | /* Re-issue the command. */ |
| 929 | mtip_issue_ncq_command(port, tag); |
| 930 | |
| 931 | continue; |
| 932 | } |
| 933 | |
| 934 | /* Retire a command that will not be reissued */ |
| 935 | dev_warn(&port->dd->pdev->dev, |
| 936 | "retiring tag %d\n", tag); |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 937 | atomic_set(&cmd->active, 0); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 938 | |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 939 | if (cmd->comp_func) |
| 940 | cmd->comp_func( |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 941 | port, |
| 942 | tag, |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 943 | cmd->comp_data, |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 944 | PORT_IRQ_TF_ERR); |
| 945 | else |
| 946 | dev_warn(&port->dd->pdev->dev, |
| 947 | "Bad completion for tag %d\n", |
| 948 | tag); |
| 949 | } |
| 950 | } |
Asai Thambi S P | 95fea2f | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 951 | print_tags(dd, "reissued (TFE)", tagaccum, cmd_cnt); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 952 | |
Asai Thambi S P | d02e1f0 | 2012-05-29 18:42:27 -0700 | [diff] [blame] | 953 | handle_tfe_exit: |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 954 | /* clear eh_active */ |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 955 | clear_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags); |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 956 | wake_up_interruptible(&port->svc_wait); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 957 | |
| 958 | mod_timer(&port->cmd_timer, |
| 959 | jiffies + msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD)); |
| 960 | } |
| 961 | |
| 962 | /* |
| 963 | * Handle a set device bits interrupt |
| 964 | */ |
| 965 | static inline void mtip_process_sdbf(struct driver_data *dd) |
| 966 | { |
| 967 | struct mtip_port *port = dd->port; |
| 968 | int group, tag, bit; |
| 969 | u32 completed; |
| 970 | struct mtip_cmd *command; |
| 971 | |
| 972 | /* walk all bits in all slot groups */ |
| 973 | for (group = 0; group < dd->slot_groups; group++) { |
| 974 | completed = readl(port->completed[group]); |
Asai Thambi S P | 377b8fc6 | 2012-05-29 18:44:01 -0700 | [diff] [blame] | 975 | if (!completed) |
| 976 | continue; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 977 | |
| 978 | /* clear completed status register in the hardware.*/ |
| 979 | writel(completed, port->completed[group]); |
| 980 | |
| 981 | /* Process completed commands. */ |
| 982 | for (bit = 0; |
| 983 | (bit < 32) && completed; |
| 984 | bit++, completed >>= 1) { |
| 985 | if (completed & 0x01) { |
| 986 | tag = (group << 5) | bit; |
| 987 | |
| 988 | /* skip internal command slot. */ |
| 989 | if (unlikely(tag == MTIP_TAG_INTERNAL)) |
| 990 | continue; |
| 991 | |
| 992 | command = &port->commands[tag]; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 993 | /* make internal callback */ |
| 994 | if (likely(command->comp_func)) { |
| 995 | command->comp_func( |
| 996 | port, |
| 997 | tag, |
| 998 | command->comp_data, |
| 999 | 0); |
| 1000 | } else { |
| 1001 | dev_warn(&dd->pdev->dev, |
| 1002 | "Null completion " |
| 1003 | "for tag %d", |
| 1004 | tag); |
| 1005 | |
| 1006 | if (mtip_check_surprise_removal( |
| 1007 | dd->pdev)) { |
| 1008 | mtip_command_cleanup(dd); |
| 1009 | return; |
| 1010 | } |
| 1011 | } |
| 1012 | } |
| 1013 | } |
| 1014 | } |
| 1015 | } |
| 1016 | |
| 1017 | /* |
| 1018 | * Process legacy pio and d2h interrupts |
| 1019 | */ |
| 1020 | static inline void mtip_process_legacy(struct driver_data *dd, u32 port_stat) |
| 1021 | { |
| 1022 | struct mtip_port *port = dd->port; |
| 1023 | struct mtip_cmd *cmd = &port->commands[MTIP_TAG_INTERNAL]; |
| 1024 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1025 | if (test_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags) && |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1026 | (cmd != NULL) && !(readl(port->cmd_issue[MTIP_TAG_INTERNAL]) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1027 | & (1 << MTIP_TAG_INTERNAL))) { |
| 1028 | if (cmd->comp_func) { |
| 1029 | cmd->comp_func(port, |
| 1030 | MTIP_TAG_INTERNAL, |
| 1031 | cmd->comp_data, |
| 1032 | 0); |
| 1033 | return; |
| 1034 | } |
| 1035 | } |
| 1036 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1037 | return; |
| 1038 | } |
| 1039 | |
| 1040 | /* |
| 1041 | * Demux and handle errors |
| 1042 | */ |
| 1043 | static inline void mtip_process_errors(struct driver_data *dd, u32 port_stat) |
| 1044 | { |
| 1045 | if (likely(port_stat & (PORT_IRQ_TF_ERR | PORT_IRQ_IF_ERR))) |
| 1046 | mtip_handle_tfe(dd); |
| 1047 | |
| 1048 | if (unlikely(port_stat & PORT_IRQ_CONNECT)) { |
| 1049 | dev_warn(&dd->pdev->dev, |
| 1050 | "Clearing PxSERR.DIAG.x\n"); |
| 1051 | writel((1 << 26), dd->port->mmio + PORT_SCR_ERR); |
| 1052 | } |
| 1053 | |
| 1054 | if (unlikely(port_stat & PORT_IRQ_PHYRDY)) { |
| 1055 | dev_warn(&dd->pdev->dev, |
| 1056 | "Clearing PxSERR.DIAG.n\n"); |
| 1057 | writel((1 << 16), dd->port->mmio + PORT_SCR_ERR); |
| 1058 | } |
| 1059 | |
| 1060 | if (unlikely(port_stat & ~PORT_IRQ_HANDLED)) { |
| 1061 | dev_warn(&dd->pdev->dev, |
| 1062 | "Port stat errors %x unhandled\n", |
| 1063 | (port_stat & ~PORT_IRQ_HANDLED)); |
| 1064 | } |
| 1065 | } |
| 1066 | |
| 1067 | static inline irqreturn_t mtip_handle_irq(struct driver_data *data) |
| 1068 | { |
| 1069 | struct driver_data *dd = (struct driver_data *) data; |
| 1070 | struct mtip_port *port = dd->port; |
| 1071 | u32 hba_stat, port_stat; |
| 1072 | int rv = IRQ_NONE; |
| 1073 | |
| 1074 | hba_stat = readl(dd->mmio + HOST_IRQ_STAT); |
| 1075 | if (hba_stat) { |
| 1076 | rv = IRQ_HANDLED; |
| 1077 | |
| 1078 | /* Acknowledge the interrupt status on the port.*/ |
| 1079 | port_stat = readl(port->mmio + PORT_IRQ_STAT); |
| 1080 | writel(port_stat, port->mmio + PORT_IRQ_STAT); |
| 1081 | |
| 1082 | /* Demux port status */ |
| 1083 | if (likely(port_stat & PORT_IRQ_SDB_FIS)) |
| 1084 | mtip_process_sdbf(dd); |
| 1085 | |
| 1086 | if (unlikely(port_stat & PORT_IRQ_ERR)) { |
| 1087 | if (unlikely(mtip_check_surprise_removal(dd->pdev))) { |
| 1088 | mtip_command_cleanup(dd); |
| 1089 | /* don't proceed further */ |
| 1090 | return IRQ_HANDLED; |
| 1091 | } |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1092 | if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1093 | &dd->dd_flag)) |
| 1094 | return rv; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1095 | |
| 1096 | mtip_process_errors(dd, port_stat & PORT_IRQ_ERR); |
| 1097 | } |
| 1098 | |
| 1099 | if (unlikely(port_stat & PORT_IRQ_LEGACY)) |
| 1100 | mtip_process_legacy(dd, port_stat & PORT_IRQ_LEGACY); |
| 1101 | } |
| 1102 | |
| 1103 | /* acknowledge interrupt */ |
| 1104 | writel(hba_stat, dd->mmio + HOST_IRQ_STAT); |
| 1105 | |
| 1106 | return rv; |
| 1107 | } |
| 1108 | |
| 1109 | /* |
| 1110 | * Wrapper for mtip_handle_irq |
| 1111 | * (ignores return code) |
| 1112 | */ |
| 1113 | static void mtip_tasklet(unsigned long data) |
| 1114 | { |
| 1115 | mtip_handle_irq((struct driver_data *) data); |
| 1116 | } |
| 1117 | |
| 1118 | /* |
| 1119 | * HBA interrupt subroutine. |
| 1120 | * |
| 1121 | * @irq IRQ number. |
| 1122 | * @instance Pointer to the driver data structure. |
| 1123 | * |
| 1124 | * return value |
| 1125 | * IRQ_HANDLED A HBA interrupt was pending and handled. |
| 1126 | * IRQ_NONE This interrupt was not for the HBA. |
| 1127 | */ |
| 1128 | static irqreturn_t mtip_irq_handler(int irq, void *instance) |
| 1129 | { |
| 1130 | struct driver_data *dd = instance; |
| 1131 | tasklet_schedule(&dd->tasklet); |
| 1132 | return IRQ_HANDLED; |
| 1133 | } |
| 1134 | |
| 1135 | static void mtip_issue_non_ncq_command(struct mtip_port *port, int tag) |
| 1136 | { |
| 1137 | atomic_set(&port->commands[tag].active, 1); |
| 1138 | writel(1 << MTIP_TAG_BIT(tag), |
| 1139 | port->cmd_issue[MTIP_TAG_INDEX(tag)]); |
| 1140 | } |
| 1141 | |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 1142 | static bool mtip_pause_ncq(struct mtip_port *port, |
| 1143 | struct host_to_dev_fis *fis) |
| 1144 | { |
| 1145 | struct host_to_dev_fis *reply; |
| 1146 | unsigned long task_file_data; |
| 1147 | |
| 1148 | reply = port->rxfis + RX_FIS_D2H_REG; |
| 1149 | task_file_data = readl(port->mmio+PORT_TFDATA); |
| 1150 | |
| 1151 | if ((task_file_data & 1) || (fis->command == ATA_CMD_SEC_ERASE_UNIT)) |
| 1152 | return false; |
| 1153 | |
| 1154 | if (fis->command == ATA_CMD_SEC_ERASE_PREP) { |
| 1155 | set_bit(MTIP_PF_SE_ACTIVE_BIT, &port->flags); |
| 1156 | port->ic_pause_timer = jiffies; |
| 1157 | return true; |
| 1158 | } else if ((fis->command == ATA_CMD_DOWNLOAD_MICRO) && |
| 1159 | (fis->features == 0x03)) { |
| 1160 | set_bit(MTIP_PF_DM_ACTIVE_BIT, &port->flags); |
| 1161 | port->ic_pause_timer = jiffies; |
| 1162 | return true; |
| 1163 | } else if ((fis->command == ATA_CMD_SEC_ERASE_UNIT) || |
| 1164 | ((fis->command == 0xFC) && |
| 1165 | (fis->features == 0x27 || fis->features == 0x72 || |
| 1166 | fis->features == 0x62 || fis->features == 0x26))) { |
| 1167 | /* Com reset after secure erase or lowlevel format */ |
| 1168 | mtip_restart_port(port); |
| 1169 | return false; |
| 1170 | } |
| 1171 | |
| 1172 | return false; |
| 1173 | } |
| 1174 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1175 | /* |
| 1176 | * Wait for port to quiesce |
| 1177 | * |
| 1178 | * @port Pointer to port data structure |
| 1179 | * @timeout Max duration to wait (ms) |
| 1180 | * |
| 1181 | * return value |
| 1182 | * 0 Success |
| 1183 | * -EBUSY Commands still active |
| 1184 | */ |
| 1185 | static int mtip_quiesce_io(struct mtip_port *port, unsigned long timeout) |
| 1186 | { |
| 1187 | unsigned long to; |
Dan Carpenter | 3e54a3d | 2011-11-24 12:59:00 +0100 | [diff] [blame] | 1188 | unsigned int n; |
| 1189 | unsigned int active = 1; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1190 | |
| 1191 | to = jiffies + msecs_to_jiffies(timeout); |
| 1192 | do { |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1193 | if (test_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags) && |
| 1194 | test_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags)) { |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1195 | msleep(20); |
| 1196 | continue; /* svc thd is actively issuing commands */ |
| 1197 | } |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1198 | if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag)) |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1199 | return -EFAULT; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1200 | /* |
| 1201 | * Ignore s_active bit 0 of array element 0. |
| 1202 | * This bit will always be set |
| 1203 | */ |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1204 | active = readl(port->s_active[0]) & 0xFFFFFFFE; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1205 | for (n = 1; n < port->dd->slot_groups; n++) |
| 1206 | active |= readl(port->s_active[n]); |
| 1207 | |
| 1208 | if (!active) |
| 1209 | break; |
| 1210 | |
| 1211 | msleep(20); |
| 1212 | } while (time_before(jiffies, to)); |
| 1213 | |
| 1214 | return active ? -EBUSY : 0; |
| 1215 | } |
| 1216 | |
| 1217 | /* |
| 1218 | * Execute an internal command and wait for the completion. |
| 1219 | * |
| 1220 | * @port Pointer to the port data structure. |
| 1221 | * @fis Pointer to the FIS that describes the command. |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1222 | * @fis_len Length in WORDS of the FIS. |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1223 | * @buffer DMA accessible for command data. |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1224 | * @buf_len Length, in bytes, of the data buffer. |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1225 | * @opts Command header options, excluding the FIS length |
| 1226 | * and the number of PRD entries. |
| 1227 | * @timeout Time in ms to wait for the command to complete. |
| 1228 | * |
| 1229 | * return value |
| 1230 | * 0 Command completed successfully. |
| 1231 | * -EFAULT The buffer address is not correctly aligned. |
| 1232 | * -EBUSY Internal command or other IO in progress. |
| 1233 | * -EAGAIN Time out waiting for command to complete. |
| 1234 | */ |
| 1235 | static int mtip_exec_internal_command(struct mtip_port *port, |
Asai Thambi S P | 8182b49 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1236 | struct host_to_dev_fis *fis, |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1237 | int fis_len, |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1238 | dma_addr_t buffer, |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1239 | int buf_len, |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1240 | u32 opts, |
| 1241 | gfp_t atomic, |
| 1242 | unsigned long timeout) |
| 1243 | { |
| 1244 | struct mtip_cmd_sg *command_sg; |
| 1245 | DECLARE_COMPLETION_ONSTACK(wait); |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 1246 | int rv = 0, ready2go = 1; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1247 | struct mtip_cmd *int_cmd = &port->commands[MTIP_TAG_INTERNAL]; |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 1248 | unsigned long to; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1249 | |
| 1250 | /* Make sure the buffer is 8 byte aligned. This is asic specific. */ |
| 1251 | if (buffer & 0x00000007) { |
| 1252 | dev_err(&port->dd->pdev->dev, |
| 1253 | "SG buffer is not 8 byte aligned\n"); |
| 1254 | return -EFAULT; |
| 1255 | } |
| 1256 | |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 1257 | to = jiffies + msecs_to_jiffies(timeout); |
| 1258 | do { |
| 1259 | ready2go = !test_and_set_bit(MTIP_TAG_INTERNAL, |
| 1260 | port->allocated); |
| 1261 | if (ready2go) |
| 1262 | break; |
| 1263 | mdelay(100); |
| 1264 | } while (time_before(jiffies, to)); |
| 1265 | if (!ready2go) { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1266 | dev_warn(&port->dd->pdev->dev, |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 1267 | "Internal cmd active. new cmd [%02X]\n", fis->command); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1268 | return -EBUSY; |
| 1269 | } |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1270 | set_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags); |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 1271 | port->ic_pause_timer = 0; |
| 1272 | |
| 1273 | if (fis->command == ATA_CMD_SEC_ERASE_UNIT) |
| 1274 | clear_bit(MTIP_PF_SE_ACTIVE_BIT, &port->flags); |
| 1275 | else if (fis->command == ATA_CMD_DOWNLOAD_MICRO) |
| 1276 | clear_bit(MTIP_PF_DM_ACTIVE_BIT, &port->flags); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1277 | |
| 1278 | if (atomic == GFP_KERNEL) { |
Asai Thambi S P | 8182b49 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1279 | if (fis->command != ATA_CMD_STANDBYNOW1) { |
| 1280 | /* wait for io to complete if non atomic */ |
| 1281 | if (mtip_quiesce_io(port, 5000) < 0) { |
| 1282 | dev_warn(&port->dd->pdev->dev, |
| 1283 | "Failed to quiesce IO\n"); |
| 1284 | release_slot(port, MTIP_TAG_INTERNAL); |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1285 | clear_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags); |
Asai Thambi S P | 8182b49 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1286 | wake_up_interruptible(&port->svc_wait); |
| 1287 | return -EBUSY; |
| 1288 | } |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1289 | } |
| 1290 | |
| 1291 | /* Set the completion function and data for the command. */ |
| 1292 | int_cmd->comp_data = &wait; |
| 1293 | int_cmd->comp_func = mtip_completion; |
| 1294 | |
| 1295 | } else { |
| 1296 | /* Clear completion - we're going to poll */ |
| 1297 | int_cmd->comp_data = NULL; |
Asai Thambi S P | 8182b49 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1298 | int_cmd->comp_func = mtip_null_completion; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1299 | } |
| 1300 | |
| 1301 | /* Copy the command to the command table */ |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1302 | memcpy(int_cmd->command, fis, fis_len*4); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1303 | |
| 1304 | /* Populate the SG list */ |
| 1305 | int_cmd->command_header->opts = |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1306 | __force_bit2int cpu_to_le32(opts | fis_len); |
| 1307 | if (buf_len) { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1308 | command_sg = int_cmd->command + AHCI_CMD_TBL_HDR_SZ; |
| 1309 | |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1310 | command_sg->info = |
| 1311 | __force_bit2int cpu_to_le32((buf_len-1) & 0x3FFFFF); |
| 1312 | command_sg->dba = |
| 1313 | __force_bit2int cpu_to_le32(buffer & 0xFFFFFFFF); |
| 1314 | command_sg->dba_upper = |
| 1315 | __force_bit2int cpu_to_le32((buffer >> 16) >> 16); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1316 | |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1317 | int_cmd->command_header->opts |= |
| 1318 | __force_bit2int cpu_to_le32((1 << 16)); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1319 | } |
| 1320 | |
| 1321 | /* Populate the command header */ |
| 1322 | int_cmd->command_header->byte_count = 0; |
| 1323 | |
| 1324 | /* Issue the command to the hardware */ |
| 1325 | mtip_issue_non_ncq_command(port, MTIP_TAG_INTERNAL); |
| 1326 | |
| 1327 | /* Poll if atomic, wait_for_completion otherwise */ |
| 1328 | if (atomic == GFP_KERNEL) { |
| 1329 | /* Wait for the command to complete or timeout. */ |
| 1330 | if (wait_for_completion_timeout( |
| 1331 | &wait, |
| 1332 | msecs_to_jiffies(timeout)) == 0) { |
| 1333 | dev_err(&port->dd->pdev->dev, |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1334 | "Internal command did not complete [%d] " |
| 1335 | "within timeout of %lu ms\n", |
| 1336 | atomic, timeout); |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1337 | if (mtip_check_surprise_removal(port->dd->pdev) || |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1338 | test_bit(MTIP_DDF_REMOVE_PENDING_BIT, |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1339 | &port->dd->dd_flag)) { |
| 1340 | rv = -ENXIO; |
| 1341 | goto exec_ic_exit; |
| 1342 | } |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1343 | rv = -EAGAIN; |
| 1344 | } |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1345 | } else { |
| 1346 | /* Spin for <timeout> checking if command still outstanding */ |
| 1347 | timeout = jiffies + msecs_to_jiffies(timeout); |
Asai Thambi S P | 8182b49 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1348 | while ((readl(port->cmd_issue[MTIP_TAG_INTERNAL]) |
| 1349 | & (1 << MTIP_TAG_INTERNAL)) |
| 1350 | && time_before(jiffies, timeout)) { |
| 1351 | if (mtip_check_surprise_removal(port->dd->pdev)) { |
| 1352 | rv = -ENXIO; |
| 1353 | goto exec_ic_exit; |
| 1354 | } |
| 1355 | if ((fis->command != ATA_CMD_STANDBYNOW1) && |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1356 | test_bit(MTIP_DDF_REMOVE_PENDING_BIT, |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1357 | &port->dd->dd_flag)) { |
| 1358 | rv = -ENXIO; |
| 1359 | goto exec_ic_exit; |
| 1360 | } |
Asai Thambi S P | d02e1f0 | 2012-05-29 18:42:27 -0700 | [diff] [blame] | 1361 | if (readl(port->mmio + PORT_IRQ_STAT) & PORT_IRQ_ERR) { |
| 1362 | atomic_inc(&int_cmd->active); /* error */ |
| 1363 | break; |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1364 | } |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1365 | } |
| 1366 | } |
Asai Thambi S P | d02e1f0 | 2012-05-29 18:42:27 -0700 | [diff] [blame] | 1367 | |
| 1368 | if (atomic_read(&int_cmd->active) > 1) { |
| 1369 | dev_err(&port->dd->pdev->dev, |
| 1370 | "Internal command [%02X] failed\n", fis->command); |
| 1371 | rv = -EIO; |
| 1372 | } |
| 1373 | if (readl(port->cmd_issue[MTIP_TAG_INTERNAL]) |
| 1374 | & (1 << MTIP_TAG_INTERNAL)) { |
| 1375 | rv = -ENXIO; |
| 1376 | if (!test_bit(MTIP_DDF_REMOVE_PENDING_BIT, |
| 1377 | &port->dd->dd_flag)) { |
| 1378 | mtip_restart_port(port); |
| 1379 | rv = -EAGAIN; |
| 1380 | } |
| 1381 | } |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1382 | exec_ic_exit: |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1383 | /* Clear the allocated and active bits for the internal command. */ |
| 1384 | atomic_set(&int_cmd->active, 0); |
| 1385 | release_slot(port, MTIP_TAG_INTERNAL); |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 1386 | if (rv >= 0 && mtip_pause_ncq(port, fis)) { |
| 1387 | /* NCQ paused */ |
| 1388 | return rv; |
| 1389 | } |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1390 | clear_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags); |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1391 | wake_up_interruptible(&port->svc_wait); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1392 | |
| 1393 | return rv; |
| 1394 | } |
| 1395 | |
| 1396 | /* |
| 1397 | * Byte-swap ATA ID strings. |
| 1398 | * |
| 1399 | * ATA identify data contains strings in byte-swapped 16-bit words. |
| 1400 | * They must be swapped (on all architectures) to be usable as C strings. |
| 1401 | * This function swaps bytes in-place. |
| 1402 | * |
| 1403 | * @buf The buffer location of the string |
| 1404 | * @len The number of bytes to swap |
| 1405 | * |
| 1406 | * return value |
| 1407 | * None |
| 1408 | */ |
| 1409 | static inline void ata_swap_string(u16 *buf, unsigned int len) |
| 1410 | { |
| 1411 | int i; |
| 1412 | for (i = 0; i < (len/2); i++) |
| 1413 | be16_to_cpus(&buf[i]); |
| 1414 | } |
| 1415 | |
| 1416 | /* |
| 1417 | * Request the device identity information. |
| 1418 | * |
| 1419 | * If a user space buffer is not specified, i.e. is NULL, the |
| 1420 | * identify information is still read from the drive and placed |
| 1421 | * into the identify data buffer (@e port->identify) in the |
| 1422 | * port data structure. |
| 1423 | * When the identify buffer contains valid identify information @e |
| 1424 | * port->identify_valid is non-zero. |
| 1425 | * |
| 1426 | * @port Pointer to the port structure. |
| 1427 | * @user_buffer A user space buffer where the identify data should be |
| 1428 | * copied. |
| 1429 | * |
| 1430 | * return value |
| 1431 | * 0 Command completed successfully. |
| 1432 | * -EFAULT An error occurred while coping data to the user buffer. |
| 1433 | * -1 Command failed. |
| 1434 | */ |
| 1435 | static int mtip_get_identify(struct mtip_port *port, void __user *user_buffer) |
| 1436 | { |
| 1437 | int rv = 0; |
| 1438 | struct host_to_dev_fis fis; |
| 1439 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1440 | if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag)) |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1441 | return -EFAULT; |
| 1442 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1443 | /* Build the FIS. */ |
| 1444 | memset(&fis, 0, sizeof(struct host_to_dev_fis)); |
| 1445 | fis.type = 0x27; |
| 1446 | fis.opts = 1 << 7; |
| 1447 | fis.command = ATA_CMD_ID_ATA; |
| 1448 | |
| 1449 | /* Set the identify information as invalid. */ |
| 1450 | port->identify_valid = 0; |
| 1451 | |
| 1452 | /* Clear the identify information. */ |
| 1453 | memset(port->identify, 0, sizeof(u16) * ATA_ID_WORDS); |
| 1454 | |
| 1455 | /* Execute the command. */ |
| 1456 | if (mtip_exec_internal_command(port, |
| 1457 | &fis, |
| 1458 | 5, |
| 1459 | port->identify_dma, |
| 1460 | sizeof(u16) * ATA_ID_WORDS, |
| 1461 | 0, |
| 1462 | GFP_KERNEL, |
| 1463 | MTIP_INTERNAL_COMMAND_TIMEOUT_MS) |
| 1464 | < 0) { |
| 1465 | rv = -1; |
| 1466 | goto out; |
| 1467 | } |
| 1468 | |
| 1469 | /* |
| 1470 | * Perform any necessary byte-swapping. Yes, the kernel does in fact |
| 1471 | * perform field-sensitive swapping on the string fields. |
| 1472 | * See the kernel use of ata_id_string() for proof of this. |
| 1473 | */ |
| 1474 | #ifdef __LITTLE_ENDIAN |
| 1475 | ata_swap_string(port->identify + 27, 40); /* model string*/ |
| 1476 | ata_swap_string(port->identify + 23, 8); /* firmware string*/ |
| 1477 | ata_swap_string(port->identify + 10, 20); /* serial# string*/ |
| 1478 | #else |
| 1479 | { |
| 1480 | int i; |
| 1481 | for (i = 0; i < ATA_ID_WORDS; i++) |
| 1482 | port->identify[i] = le16_to_cpu(port->identify[i]); |
| 1483 | } |
| 1484 | #endif |
| 1485 | |
| 1486 | /* Set the identify buffer as valid. */ |
| 1487 | port->identify_valid = 1; |
| 1488 | |
| 1489 | if (user_buffer) { |
| 1490 | if (copy_to_user( |
| 1491 | user_buffer, |
| 1492 | port->identify, |
| 1493 | ATA_ID_WORDS * sizeof(u16))) { |
| 1494 | rv = -EFAULT; |
| 1495 | goto out; |
| 1496 | } |
| 1497 | } |
| 1498 | |
| 1499 | out: |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1500 | return rv; |
| 1501 | } |
| 1502 | |
| 1503 | /* |
| 1504 | * Issue a standby immediate command to the device. |
| 1505 | * |
| 1506 | * @port Pointer to the port structure. |
| 1507 | * |
| 1508 | * return value |
| 1509 | * 0 Command was executed successfully. |
| 1510 | * -1 An error occurred while executing the command. |
| 1511 | */ |
| 1512 | static int mtip_standby_immediate(struct mtip_port *port) |
| 1513 | { |
| 1514 | int rv; |
| 1515 | struct host_to_dev_fis fis; |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1516 | unsigned long start; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1517 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1518 | /* Build the FIS. */ |
| 1519 | memset(&fis, 0, sizeof(struct host_to_dev_fis)); |
| 1520 | fis.type = 0x27; |
| 1521 | fis.opts = 1 << 7; |
| 1522 | fis.command = ATA_CMD_STANDBYNOW1; |
| 1523 | |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1524 | start = jiffies; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1525 | rv = mtip_exec_internal_command(port, |
| 1526 | &fis, |
| 1527 | 5, |
| 1528 | 0, |
| 1529 | 0, |
| 1530 | 0, |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1531 | GFP_ATOMIC, |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1532 | 15000); |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1533 | dbg_printk(MTIP_DRV_NAME "Time taken to complete standby cmd: %d ms\n", |
| 1534 | jiffies_to_msecs(jiffies - start)); |
| 1535 | if (rv) |
| 1536 | dev_warn(&port->dd->pdev->dev, |
| 1537 | "STANDBY IMMEDIATE command failed.\n"); |
| 1538 | |
| 1539 | return rv; |
| 1540 | } |
| 1541 | |
| 1542 | /* |
| 1543 | * Issue a READ LOG EXT command to the device. |
| 1544 | * |
| 1545 | * @port pointer to the port structure. |
| 1546 | * @page page number to fetch |
| 1547 | * @buffer pointer to buffer |
| 1548 | * @buffer_dma dma address corresponding to @buffer |
| 1549 | * @sectors page length to fetch, in sectors |
| 1550 | * |
| 1551 | * return value |
| 1552 | * @rv return value from mtip_exec_internal_command() |
| 1553 | */ |
| 1554 | static int mtip_read_log_page(struct mtip_port *port, u8 page, u16 *buffer, |
| 1555 | dma_addr_t buffer_dma, unsigned int sectors) |
| 1556 | { |
| 1557 | struct host_to_dev_fis fis; |
| 1558 | |
| 1559 | memset(&fis, 0, sizeof(struct host_to_dev_fis)); |
| 1560 | fis.type = 0x27; |
| 1561 | fis.opts = 1 << 7; |
| 1562 | fis.command = ATA_CMD_READ_LOG_EXT; |
| 1563 | fis.sect_count = sectors & 0xFF; |
| 1564 | fis.sect_cnt_ex = (sectors >> 8) & 0xFF; |
| 1565 | fis.lba_low = page; |
| 1566 | fis.lba_mid = 0; |
| 1567 | fis.device = ATA_DEVICE_OBS; |
| 1568 | |
| 1569 | memset(buffer, 0, sectors * ATA_SECT_SIZE); |
| 1570 | |
| 1571 | return mtip_exec_internal_command(port, |
| 1572 | &fis, |
| 1573 | 5, |
| 1574 | buffer_dma, |
| 1575 | sectors * ATA_SECT_SIZE, |
| 1576 | 0, |
| 1577 | GFP_ATOMIC, |
| 1578 | MTIP_INTERNAL_COMMAND_TIMEOUT_MS); |
| 1579 | } |
| 1580 | |
| 1581 | /* |
| 1582 | * Issue a SMART READ DATA command to the device. |
| 1583 | * |
| 1584 | * @port pointer to the port structure. |
| 1585 | * @buffer pointer to buffer |
| 1586 | * @buffer_dma dma address corresponding to @buffer |
| 1587 | * |
| 1588 | * return value |
| 1589 | * @rv return value from mtip_exec_internal_command() |
| 1590 | */ |
| 1591 | static int mtip_get_smart_data(struct mtip_port *port, u8 *buffer, |
| 1592 | dma_addr_t buffer_dma) |
| 1593 | { |
| 1594 | struct host_to_dev_fis fis; |
| 1595 | |
| 1596 | memset(&fis, 0, sizeof(struct host_to_dev_fis)); |
| 1597 | fis.type = 0x27; |
| 1598 | fis.opts = 1 << 7; |
| 1599 | fis.command = ATA_CMD_SMART; |
| 1600 | fis.features = 0xD0; |
| 1601 | fis.sect_count = 1; |
| 1602 | fis.lba_mid = 0x4F; |
| 1603 | fis.lba_hi = 0xC2; |
| 1604 | fis.device = ATA_DEVICE_OBS; |
| 1605 | |
| 1606 | return mtip_exec_internal_command(port, |
| 1607 | &fis, |
| 1608 | 5, |
| 1609 | buffer_dma, |
| 1610 | ATA_SECT_SIZE, |
| 1611 | 0, |
| 1612 | GFP_ATOMIC, |
| 1613 | 15000); |
| 1614 | } |
| 1615 | |
| 1616 | /* |
| 1617 | * Get the value of a smart attribute |
| 1618 | * |
| 1619 | * @port pointer to the port structure |
| 1620 | * @id attribute number |
| 1621 | * @attrib pointer to return attrib information corresponding to @id |
| 1622 | * |
| 1623 | * return value |
| 1624 | * -EINVAL NULL buffer passed or unsupported attribute @id. |
| 1625 | * -EPERM Identify data not valid, SMART not supported or not enabled |
| 1626 | */ |
| 1627 | static int mtip_get_smart_attr(struct mtip_port *port, unsigned int id, |
| 1628 | struct smart_attr *attrib) |
| 1629 | { |
| 1630 | int rv, i; |
| 1631 | struct smart_attr *pattr; |
| 1632 | |
| 1633 | if (!attrib) |
| 1634 | return -EINVAL; |
| 1635 | |
| 1636 | if (!port->identify_valid) { |
| 1637 | dev_warn(&port->dd->pdev->dev, "IDENTIFY DATA not valid\n"); |
| 1638 | return -EPERM; |
| 1639 | } |
| 1640 | if (!(port->identify[82] & 0x1)) { |
| 1641 | dev_warn(&port->dd->pdev->dev, "SMART not supported\n"); |
| 1642 | return -EPERM; |
| 1643 | } |
| 1644 | if (!(port->identify[85] & 0x1)) { |
| 1645 | dev_warn(&port->dd->pdev->dev, "SMART not enabled\n"); |
| 1646 | return -EPERM; |
| 1647 | } |
| 1648 | |
| 1649 | memset(port->smart_buf, 0, ATA_SECT_SIZE); |
| 1650 | rv = mtip_get_smart_data(port, port->smart_buf, port->smart_buf_dma); |
| 1651 | if (rv) { |
| 1652 | dev_warn(&port->dd->pdev->dev, "Failed to ge SMART data\n"); |
| 1653 | return rv; |
| 1654 | } |
| 1655 | |
| 1656 | pattr = (struct smart_attr *)(port->smart_buf + 2); |
| 1657 | for (i = 0; i < 29; i++, pattr++) |
| 1658 | if (pattr->attr_id == id) { |
| 1659 | memcpy(attrib, pattr, sizeof(struct smart_attr)); |
| 1660 | break; |
| 1661 | } |
| 1662 | |
| 1663 | if (i == 29) { |
| 1664 | dev_warn(&port->dd->pdev->dev, |
| 1665 | "Query for invalid SMART attribute ID\n"); |
| 1666 | rv = -EINVAL; |
| 1667 | } |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1668 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1669 | return rv; |
| 1670 | } |
| 1671 | |
| 1672 | /* |
| 1673 | * Get the drive capacity. |
| 1674 | * |
| 1675 | * @dd Pointer to the device data structure. |
| 1676 | * @sectors Pointer to the variable that will receive the sector count. |
| 1677 | * |
| 1678 | * return value |
| 1679 | * 1 Capacity was returned successfully. |
| 1680 | * 0 The identify information is invalid. |
| 1681 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 1682 | static bool mtip_hw_get_capacity(struct driver_data *dd, sector_t *sectors) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1683 | { |
| 1684 | struct mtip_port *port = dd->port; |
| 1685 | u64 total, raw0, raw1, raw2, raw3; |
| 1686 | raw0 = port->identify[100]; |
| 1687 | raw1 = port->identify[101]; |
| 1688 | raw2 = port->identify[102]; |
| 1689 | raw3 = port->identify[103]; |
| 1690 | total = raw0 | raw1<<16 | raw2<<32 | raw3<<48; |
| 1691 | *sectors = total; |
| 1692 | return (bool) !!port->identify_valid; |
| 1693 | } |
| 1694 | |
| 1695 | /* |
| 1696 | * Reset the HBA. |
| 1697 | * |
| 1698 | * Resets the HBA by setting the HBA Reset bit in the Global |
| 1699 | * HBA Control register. After setting the HBA Reset bit the |
| 1700 | * function waits for 1 second before reading the HBA Reset |
| 1701 | * bit to make sure it has cleared. If HBA Reset is not clear |
| 1702 | * an error is returned. Cannot be used in non-blockable |
| 1703 | * context. |
| 1704 | * |
| 1705 | * @dd Pointer to the driver data structure. |
| 1706 | * |
| 1707 | * return value |
| 1708 | * 0 The reset was successful. |
| 1709 | * -1 The HBA Reset bit did not clear. |
| 1710 | */ |
| 1711 | static int mtip_hba_reset(struct driver_data *dd) |
| 1712 | { |
| 1713 | mtip_deinit_port(dd->port); |
| 1714 | |
| 1715 | /* Set the reset bit */ |
| 1716 | writel(HOST_RESET, dd->mmio + HOST_CTL); |
| 1717 | |
| 1718 | /* Flush */ |
| 1719 | readl(dd->mmio + HOST_CTL); |
| 1720 | |
| 1721 | /* Wait for reset to clear */ |
| 1722 | ssleep(1); |
| 1723 | |
| 1724 | /* Check the bit has cleared */ |
| 1725 | if (readl(dd->mmio + HOST_CTL) & HOST_RESET) { |
| 1726 | dev_err(&dd->pdev->dev, |
| 1727 | "Reset bit did not clear.\n"); |
| 1728 | return -1; |
| 1729 | } |
| 1730 | |
| 1731 | return 0; |
| 1732 | } |
| 1733 | |
| 1734 | /* |
| 1735 | * Display the identify command data. |
| 1736 | * |
| 1737 | * @port Pointer to the port data structure. |
| 1738 | * |
| 1739 | * return value |
| 1740 | * None |
| 1741 | */ |
| 1742 | static void mtip_dump_identify(struct mtip_port *port) |
| 1743 | { |
| 1744 | sector_t sectors; |
| 1745 | unsigned short revid; |
| 1746 | char cbuf[42]; |
| 1747 | |
| 1748 | if (!port->identify_valid) |
| 1749 | return; |
| 1750 | |
| 1751 | strlcpy(cbuf, (char *)(port->identify+10), 21); |
| 1752 | dev_info(&port->dd->pdev->dev, |
| 1753 | "Serial No.: %s\n", cbuf); |
| 1754 | |
| 1755 | strlcpy(cbuf, (char *)(port->identify+23), 9); |
| 1756 | dev_info(&port->dd->pdev->dev, |
| 1757 | "Firmware Ver.: %s\n", cbuf); |
| 1758 | |
| 1759 | strlcpy(cbuf, (char *)(port->identify+27), 41); |
| 1760 | dev_info(&port->dd->pdev->dev, "Model: %s\n", cbuf); |
| 1761 | |
| 1762 | if (mtip_hw_get_capacity(port->dd, §ors)) |
| 1763 | dev_info(&port->dd->pdev->dev, |
| 1764 | "Capacity: %llu sectors (%llu MB)\n", |
| 1765 | (u64)sectors, |
| 1766 | ((u64)sectors) * ATA_SECT_SIZE >> 20); |
| 1767 | |
| 1768 | pci_read_config_word(port->dd->pdev, PCI_REVISION_ID, &revid); |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1769 | switch (revid & 0xFF) { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1770 | case 0x1: |
| 1771 | strlcpy(cbuf, "A0", 3); |
| 1772 | break; |
| 1773 | case 0x3: |
| 1774 | strlcpy(cbuf, "A2", 3); |
| 1775 | break; |
| 1776 | default: |
| 1777 | strlcpy(cbuf, "?", 2); |
| 1778 | break; |
| 1779 | } |
| 1780 | dev_info(&port->dd->pdev->dev, |
| 1781 | "Card Type: %s\n", cbuf); |
| 1782 | } |
| 1783 | |
| 1784 | /* |
| 1785 | * Map the commands scatter list into the command table. |
| 1786 | * |
| 1787 | * @command Pointer to the command. |
| 1788 | * @nents Number of scatter list entries. |
| 1789 | * |
| 1790 | * return value |
| 1791 | * None |
| 1792 | */ |
| 1793 | static inline void fill_command_sg(struct driver_data *dd, |
| 1794 | struct mtip_cmd *command, |
| 1795 | int nents) |
| 1796 | { |
| 1797 | int n; |
| 1798 | unsigned int dma_len; |
| 1799 | struct mtip_cmd_sg *command_sg; |
| 1800 | struct scatterlist *sg = command->sg; |
| 1801 | |
| 1802 | command_sg = command->command + AHCI_CMD_TBL_HDR_SZ; |
| 1803 | |
| 1804 | for (n = 0; n < nents; n++) { |
| 1805 | dma_len = sg_dma_len(sg); |
| 1806 | if (dma_len > 0x400000) |
| 1807 | dev_err(&dd->pdev->dev, |
| 1808 | "DMA segment length truncated\n"); |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1809 | command_sg->info = __force_bit2int |
| 1810 | cpu_to_le32((dma_len-1) & 0x3FFFFF); |
| 1811 | command_sg->dba = __force_bit2int |
| 1812 | cpu_to_le32(sg_dma_address(sg)); |
| 1813 | command_sg->dba_upper = __force_bit2int |
| 1814 | cpu_to_le32((sg_dma_address(sg) >> 16) >> 16); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1815 | command_sg++; |
| 1816 | sg++; |
| 1817 | } |
| 1818 | } |
| 1819 | |
| 1820 | /* |
| 1821 | * @brief Execute a drive command. |
| 1822 | * |
| 1823 | * return value 0 The command completed successfully. |
| 1824 | * return value -1 An error occurred while executing the command. |
| 1825 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 1826 | static int exec_drive_task(struct mtip_port *port, u8 *command) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1827 | { |
| 1828 | struct host_to_dev_fis fis; |
| 1829 | struct host_to_dev_fis *reply = (port->rxfis + RX_FIS_D2H_REG); |
| 1830 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1831 | /* Build the FIS. */ |
| 1832 | memset(&fis, 0, sizeof(struct host_to_dev_fis)); |
| 1833 | fis.type = 0x27; |
| 1834 | fis.opts = 1 << 7; |
| 1835 | fis.command = command[0]; |
| 1836 | fis.features = command[1]; |
| 1837 | fis.sect_count = command[2]; |
| 1838 | fis.sector = command[3]; |
| 1839 | fis.cyl_low = command[4]; |
| 1840 | fis.cyl_hi = command[5]; |
| 1841 | fis.device = command[6] & ~0x10; /* Clear the dev bit*/ |
| 1842 | |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 1843 | dbg_printk(MTIP_DRV_NAME " %s: User Command: cmd %x, feat %x, nsect %x, sect %x, lcyl %x, hcyl %x, sel %x\n", |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1844 | __func__, |
| 1845 | command[0], |
| 1846 | command[1], |
| 1847 | command[2], |
| 1848 | command[3], |
| 1849 | command[4], |
| 1850 | command[5], |
| 1851 | command[6]); |
| 1852 | |
| 1853 | /* Execute the command. */ |
| 1854 | if (mtip_exec_internal_command(port, |
| 1855 | &fis, |
| 1856 | 5, |
| 1857 | 0, |
| 1858 | 0, |
| 1859 | 0, |
| 1860 | GFP_KERNEL, |
| 1861 | MTIP_IOCTL_COMMAND_TIMEOUT_MS) < 0) { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1862 | return -1; |
| 1863 | } |
| 1864 | |
| 1865 | command[0] = reply->command; /* Status*/ |
| 1866 | command[1] = reply->features; /* Error*/ |
| 1867 | command[4] = reply->cyl_low; |
| 1868 | command[5] = reply->cyl_hi; |
| 1869 | |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 1870 | dbg_printk(MTIP_DRV_NAME " %s: Completion Status: stat %x, err %x , cyl_lo %x cyl_hi %x\n", |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1871 | __func__, |
| 1872 | command[0], |
| 1873 | command[1], |
| 1874 | command[4], |
| 1875 | command[5]); |
| 1876 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1877 | return 0; |
| 1878 | } |
| 1879 | |
| 1880 | /* |
| 1881 | * @brief Execute a drive command. |
| 1882 | * |
| 1883 | * @param port Pointer to the port data structure. |
| 1884 | * @param command Pointer to the user specified command parameters. |
| 1885 | * @param user_buffer Pointer to the user space buffer where read sector |
| 1886 | * data should be copied. |
| 1887 | * |
| 1888 | * return value 0 The command completed successfully. |
| 1889 | * return value -EFAULT An error occurred while copying the completion |
| 1890 | * data to the user space buffer. |
| 1891 | * return value -1 An error occurred while executing the command. |
| 1892 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 1893 | static int exec_drive_command(struct mtip_port *port, u8 *command, |
| 1894 | void __user *user_buffer) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1895 | { |
| 1896 | struct host_to_dev_fis fis; |
Asai Thambi S P | e602878f | 2012-05-29 18:43:31 -0700 | [diff] [blame] | 1897 | struct host_to_dev_fis *reply; |
| 1898 | u8 *buf = NULL; |
| 1899 | dma_addr_t dma_addr = 0; |
| 1900 | int rv = 0, xfer_sz = command[3]; |
| 1901 | |
| 1902 | if (xfer_sz) { |
| 1903 | if (user_buffer) |
| 1904 | return -EFAULT; |
| 1905 | |
| 1906 | buf = dmam_alloc_coherent(&port->dd->pdev->dev, |
| 1907 | ATA_SECT_SIZE * xfer_sz, |
| 1908 | &dma_addr, |
| 1909 | GFP_KERNEL); |
| 1910 | if (!buf) { |
| 1911 | dev_err(&port->dd->pdev->dev, |
| 1912 | "Memory allocation failed (%d bytes)\n", |
| 1913 | ATA_SECT_SIZE * xfer_sz); |
| 1914 | return -ENOMEM; |
| 1915 | } |
| 1916 | memset(buf, 0, ATA_SECT_SIZE * xfer_sz); |
| 1917 | } |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1918 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1919 | /* Build the FIS. */ |
| 1920 | memset(&fis, 0, sizeof(struct host_to_dev_fis)); |
Asai Thambi S P | e602878f | 2012-05-29 18:43:31 -0700 | [diff] [blame] | 1921 | fis.type = 0x27; |
| 1922 | fis.opts = 1 << 7; |
| 1923 | fis.command = command[0]; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1924 | fis.features = command[2]; |
| 1925 | fis.sect_count = command[3]; |
| 1926 | if (fis.command == ATA_CMD_SMART) { |
| 1927 | fis.sector = command[1]; |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1928 | fis.cyl_low = 0x4F; |
| 1929 | fis.cyl_hi = 0xC2; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1930 | } |
| 1931 | |
Asai Thambi S P | e602878f | 2012-05-29 18:43:31 -0700 | [diff] [blame] | 1932 | if (xfer_sz) |
| 1933 | reply = (port->rxfis + RX_FIS_PIO_SETUP); |
| 1934 | else |
| 1935 | reply = (port->rxfis + RX_FIS_D2H_REG); |
| 1936 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1937 | dbg_printk(MTIP_DRV_NAME |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 1938 | " %s: User Command: cmd %x, sect %x, " |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1939 | "feat %x, sectcnt %x\n", |
| 1940 | __func__, |
| 1941 | command[0], |
| 1942 | command[1], |
| 1943 | command[2], |
| 1944 | command[3]); |
| 1945 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1946 | /* Execute the command. */ |
| 1947 | if (mtip_exec_internal_command(port, |
| 1948 | &fis, |
| 1949 | 5, |
Asai Thambi S P | e602878f | 2012-05-29 18:43:31 -0700 | [diff] [blame] | 1950 | (xfer_sz ? dma_addr : 0), |
| 1951 | (xfer_sz ? ATA_SECT_SIZE * xfer_sz : 0), |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1952 | 0, |
| 1953 | GFP_KERNEL, |
| 1954 | MTIP_IOCTL_COMMAND_TIMEOUT_MS) |
| 1955 | < 0) { |
Asai Thambi S P | e602878f | 2012-05-29 18:43:31 -0700 | [diff] [blame] | 1956 | rv = -EFAULT; |
| 1957 | goto exit_drive_command; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1958 | } |
| 1959 | |
| 1960 | /* Collect the completion status. */ |
| 1961 | command[0] = reply->command; /* Status*/ |
| 1962 | command[1] = reply->features; /* Error*/ |
Asai Thambi S P | e602878f | 2012-05-29 18:43:31 -0700 | [diff] [blame] | 1963 | command[2] = reply->sect_count; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1964 | |
| 1965 | dbg_printk(MTIP_DRV_NAME |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 1966 | " %s: Completion Status: stat %x, " |
Asai Thambi S P | e602878f | 2012-05-29 18:43:31 -0700 | [diff] [blame] | 1967 | "err %x, nsect %x\n", |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1968 | __func__, |
| 1969 | command[0], |
| 1970 | command[1], |
| 1971 | command[2]); |
| 1972 | |
Asai Thambi S P | e602878f | 2012-05-29 18:43:31 -0700 | [diff] [blame] | 1973 | if (xfer_sz) { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1974 | if (copy_to_user(user_buffer, |
Asai Thambi S P | e602878f | 2012-05-29 18:43:31 -0700 | [diff] [blame] | 1975 | buf, |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1976 | ATA_SECT_SIZE * command[3])) { |
Asai Thambi S P | e602878f | 2012-05-29 18:43:31 -0700 | [diff] [blame] | 1977 | rv = -EFAULT; |
| 1978 | goto exit_drive_command; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1979 | } |
| 1980 | } |
Asai Thambi S P | e602878f | 2012-05-29 18:43:31 -0700 | [diff] [blame] | 1981 | exit_drive_command: |
| 1982 | if (buf) |
| 1983 | dmam_free_coherent(&port->dd->pdev->dev, |
| 1984 | ATA_SECT_SIZE * xfer_sz, buf, dma_addr); |
| 1985 | return rv; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1986 | } |
| 1987 | |
| 1988 | /* |
| 1989 | * Indicates whether a command has a single sector payload. |
| 1990 | * |
| 1991 | * @command passed to the device to perform the certain event. |
| 1992 | * @features passed to the device to perform the certain event. |
| 1993 | * |
| 1994 | * return value |
| 1995 | * 1 command is one that always has a single sector payload, |
| 1996 | * regardless of the value in the Sector Count field. |
| 1997 | * 0 otherwise |
| 1998 | * |
| 1999 | */ |
| 2000 | static unsigned int implicit_sector(unsigned char command, |
| 2001 | unsigned char features) |
| 2002 | { |
| 2003 | unsigned int rv = 0; |
| 2004 | |
| 2005 | /* list of commands that have an implicit sector count of 1 */ |
| 2006 | switch (command) { |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2007 | case ATA_CMD_SEC_SET_PASS: |
| 2008 | case ATA_CMD_SEC_UNLOCK: |
| 2009 | case ATA_CMD_SEC_ERASE_PREP: |
| 2010 | case ATA_CMD_SEC_ERASE_UNIT: |
| 2011 | case ATA_CMD_SEC_FREEZE_LOCK: |
| 2012 | case ATA_CMD_SEC_DISABLE_PASS: |
| 2013 | case ATA_CMD_PMP_READ: |
| 2014 | case ATA_CMD_PMP_WRITE: |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2015 | rv = 1; |
| 2016 | break; |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2017 | case ATA_CMD_SET_MAX: |
| 2018 | if (features == ATA_SET_MAX_UNLOCK) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2019 | rv = 1; |
| 2020 | break; |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2021 | case ATA_CMD_SMART: |
| 2022 | if ((features == ATA_SMART_READ_VALUES) || |
| 2023 | (features == ATA_SMART_READ_THRESHOLDS)) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2024 | rv = 1; |
| 2025 | break; |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2026 | case ATA_CMD_CONF_OVERLAY: |
| 2027 | if ((features == ATA_DCO_IDENTIFY) || |
| 2028 | (features == ATA_DCO_SET)) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2029 | rv = 1; |
| 2030 | break; |
| 2031 | } |
| 2032 | return rv; |
| 2033 | } |
| 2034 | |
Asai Thambi S P | 2df7aa9 | 2012-05-29 18:41:23 -0700 | [diff] [blame] | 2035 | static void mtip_set_timeout(struct host_to_dev_fis *fis, unsigned int *timeout) |
| 2036 | { |
| 2037 | switch (fis->command) { |
| 2038 | case ATA_CMD_DOWNLOAD_MICRO: |
| 2039 | *timeout = 120000; /* 2 minutes */ |
| 2040 | break; |
| 2041 | case ATA_CMD_SEC_ERASE_UNIT: |
| 2042 | case 0xFC: |
| 2043 | *timeout = 240000; /* 4 minutes */ |
| 2044 | break; |
| 2045 | case ATA_CMD_STANDBYNOW1: |
| 2046 | *timeout = 10000; /* 10 seconds */ |
| 2047 | break; |
| 2048 | case 0xF7: |
| 2049 | case 0xFA: |
| 2050 | *timeout = 60000; /* 60 seconds */ |
| 2051 | break; |
| 2052 | case ATA_CMD_SMART: |
| 2053 | *timeout = 15000; /* 15 seconds */ |
| 2054 | break; |
| 2055 | default: |
| 2056 | *timeout = MTIP_IOCTL_COMMAND_TIMEOUT_MS; |
| 2057 | break; |
| 2058 | } |
| 2059 | } |
| 2060 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2061 | /* |
| 2062 | * Executes a taskfile |
| 2063 | * See ide_taskfile_ioctl() for derivation |
| 2064 | */ |
| 2065 | static int exec_drive_taskfile(struct driver_data *dd, |
Jens Axboe | ef0f158 | 2011-09-27 21:19:53 -0600 | [diff] [blame] | 2066 | void __user *buf, |
| 2067 | ide_task_request_t *req_task, |
| 2068 | int outtotal) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2069 | { |
| 2070 | struct host_to_dev_fis fis; |
| 2071 | struct host_to_dev_fis *reply; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2072 | u8 *outbuf = NULL; |
| 2073 | u8 *inbuf = NULL; |
Jens Axboe | 16d02c0 | 2011-09-27 15:50:01 -0600 | [diff] [blame] | 2074 | dma_addr_t outbuf_dma = 0; |
| 2075 | dma_addr_t inbuf_dma = 0; |
| 2076 | dma_addr_t dma_buffer = 0; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2077 | int err = 0; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2078 | unsigned int taskin = 0; |
| 2079 | unsigned int taskout = 0; |
| 2080 | u8 nsect = 0; |
Asai Thambi S P | 2df7aa9 | 2012-05-29 18:41:23 -0700 | [diff] [blame] | 2081 | unsigned int timeout; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2082 | unsigned int force_single_sector; |
| 2083 | unsigned int transfer_size; |
| 2084 | unsigned long task_file_data; |
Jens Axboe | ef0f158 | 2011-09-27 21:19:53 -0600 | [diff] [blame] | 2085 | int intotal = outtotal + req_task->out_size; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2086 | |
| 2087 | taskout = req_task->out_size; |
| 2088 | taskin = req_task->in_size; |
| 2089 | /* 130560 = 512 * 0xFF*/ |
| 2090 | if (taskin > 130560 || taskout > 130560) { |
| 2091 | err = -EINVAL; |
| 2092 | goto abort; |
| 2093 | } |
| 2094 | |
| 2095 | if (taskout) { |
| 2096 | outbuf = kzalloc(taskout, GFP_KERNEL); |
| 2097 | if (outbuf == NULL) { |
| 2098 | err = -ENOMEM; |
| 2099 | goto abort; |
| 2100 | } |
| 2101 | if (copy_from_user(outbuf, buf + outtotal, taskout)) { |
| 2102 | err = -EFAULT; |
| 2103 | goto abort; |
| 2104 | } |
| 2105 | outbuf_dma = pci_map_single(dd->pdev, |
| 2106 | outbuf, |
| 2107 | taskout, |
| 2108 | DMA_TO_DEVICE); |
Jens Axboe | 16d02c0 | 2011-09-27 15:50:01 -0600 | [diff] [blame] | 2109 | if (outbuf_dma == 0) { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2110 | err = -ENOMEM; |
| 2111 | goto abort; |
| 2112 | } |
| 2113 | dma_buffer = outbuf_dma; |
| 2114 | } |
| 2115 | |
| 2116 | if (taskin) { |
| 2117 | inbuf = kzalloc(taskin, GFP_KERNEL); |
| 2118 | if (inbuf == NULL) { |
| 2119 | err = -ENOMEM; |
| 2120 | goto abort; |
| 2121 | } |
| 2122 | |
| 2123 | if (copy_from_user(inbuf, buf + intotal, taskin)) { |
| 2124 | err = -EFAULT; |
| 2125 | goto abort; |
| 2126 | } |
| 2127 | inbuf_dma = pci_map_single(dd->pdev, |
| 2128 | inbuf, |
| 2129 | taskin, DMA_FROM_DEVICE); |
Jens Axboe | 16d02c0 | 2011-09-27 15:50:01 -0600 | [diff] [blame] | 2130 | if (inbuf_dma == 0) { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2131 | err = -ENOMEM; |
| 2132 | goto abort; |
| 2133 | } |
| 2134 | dma_buffer = inbuf_dma; |
| 2135 | } |
| 2136 | |
| 2137 | /* only supports PIO and non-data commands from this ioctl. */ |
| 2138 | switch (req_task->data_phase) { |
| 2139 | case TASKFILE_OUT: |
| 2140 | nsect = taskout / ATA_SECT_SIZE; |
| 2141 | reply = (dd->port->rxfis + RX_FIS_PIO_SETUP); |
| 2142 | break; |
| 2143 | case TASKFILE_IN: |
| 2144 | reply = (dd->port->rxfis + RX_FIS_PIO_SETUP); |
| 2145 | break; |
| 2146 | case TASKFILE_NO_DATA: |
| 2147 | reply = (dd->port->rxfis + RX_FIS_D2H_REG); |
| 2148 | break; |
| 2149 | default: |
| 2150 | err = -EINVAL; |
| 2151 | goto abort; |
| 2152 | } |
| 2153 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2154 | /* Build the FIS. */ |
| 2155 | memset(&fis, 0, sizeof(struct host_to_dev_fis)); |
| 2156 | |
| 2157 | fis.type = 0x27; |
| 2158 | fis.opts = 1 << 7; |
| 2159 | fis.command = req_task->io_ports[7]; |
| 2160 | fis.features = req_task->io_ports[1]; |
| 2161 | fis.sect_count = req_task->io_ports[2]; |
| 2162 | fis.lba_low = req_task->io_ports[3]; |
| 2163 | fis.lba_mid = req_task->io_ports[4]; |
| 2164 | fis.lba_hi = req_task->io_ports[5]; |
| 2165 | /* Clear the dev bit*/ |
| 2166 | fis.device = req_task->io_ports[6] & ~0x10; |
| 2167 | |
| 2168 | if ((req_task->in_flags.all == 0) && (req_task->out_flags.all & 1)) { |
| 2169 | req_task->in_flags.all = |
| 2170 | IDE_TASKFILE_STD_IN_FLAGS | |
| 2171 | (IDE_HOB_STD_IN_FLAGS << 8); |
| 2172 | fis.lba_low_ex = req_task->hob_ports[3]; |
| 2173 | fis.lba_mid_ex = req_task->hob_ports[4]; |
| 2174 | fis.lba_hi_ex = req_task->hob_ports[5]; |
| 2175 | fis.features_ex = req_task->hob_ports[1]; |
| 2176 | fis.sect_cnt_ex = req_task->hob_ports[2]; |
| 2177 | |
| 2178 | } else { |
| 2179 | req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS; |
| 2180 | } |
| 2181 | |
| 2182 | force_single_sector = implicit_sector(fis.command, fis.features); |
| 2183 | |
| 2184 | if ((taskin || taskout) && (!fis.sect_count)) { |
| 2185 | if (nsect) |
| 2186 | fis.sect_count = nsect; |
| 2187 | else { |
| 2188 | if (!force_single_sector) { |
| 2189 | dev_warn(&dd->pdev->dev, |
| 2190 | "data movement but " |
| 2191 | "sect_count is 0\n"); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2192 | err = -EINVAL; |
| 2193 | goto abort; |
| 2194 | } |
| 2195 | } |
| 2196 | } |
| 2197 | |
| 2198 | dbg_printk(MTIP_DRV_NAME |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 2199 | " %s: cmd %x, feat %x, nsect %x," |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2200 | " sect/lbal %x, lcyl/lbam %x, hcyl/lbah %x," |
| 2201 | " head/dev %x\n", |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 2202 | __func__, |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2203 | fis.command, |
| 2204 | fis.features, |
| 2205 | fis.sect_count, |
| 2206 | fis.lba_low, |
| 2207 | fis.lba_mid, |
| 2208 | fis.lba_hi, |
| 2209 | fis.device); |
| 2210 | |
Asai Thambi S P | 2df7aa9 | 2012-05-29 18:41:23 -0700 | [diff] [blame] | 2211 | mtip_set_timeout(&fis, &timeout); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2212 | |
| 2213 | /* Determine the correct transfer size.*/ |
| 2214 | if (force_single_sector) |
| 2215 | transfer_size = ATA_SECT_SIZE; |
| 2216 | else |
| 2217 | transfer_size = ATA_SECT_SIZE * fis.sect_count; |
| 2218 | |
| 2219 | /* Execute the command.*/ |
| 2220 | if (mtip_exec_internal_command(dd->port, |
| 2221 | &fis, |
| 2222 | 5, |
| 2223 | dma_buffer, |
| 2224 | transfer_size, |
| 2225 | 0, |
| 2226 | GFP_KERNEL, |
| 2227 | timeout) < 0) { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2228 | err = -EIO; |
| 2229 | goto abort; |
| 2230 | } |
| 2231 | |
| 2232 | task_file_data = readl(dd->port->mmio+PORT_TFDATA); |
| 2233 | |
| 2234 | if ((req_task->data_phase == TASKFILE_IN) && !(task_file_data & 1)) { |
| 2235 | reply = dd->port->rxfis + RX_FIS_PIO_SETUP; |
| 2236 | req_task->io_ports[7] = reply->control; |
| 2237 | } else { |
| 2238 | reply = dd->port->rxfis + RX_FIS_D2H_REG; |
| 2239 | req_task->io_ports[7] = reply->command; |
| 2240 | } |
| 2241 | |
| 2242 | /* reclaim the DMA buffers.*/ |
| 2243 | if (inbuf_dma) |
| 2244 | pci_unmap_single(dd->pdev, inbuf_dma, |
| 2245 | taskin, DMA_FROM_DEVICE); |
| 2246 | if (outbuf_dma) |
| 2247 | pci_unmap_single(dd->pdev, outbuf_dma, |
| 2248 | taskout, DMA_TO_DEVICE); |
Jens Axboe | 16d02c0 | 2011-09-27 15:50:01 -0600 | [diff] [blame] | 2249 | inbuf_dma = 0; |
| 2250 | outbuf_dma = 0; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2251 | |
| 2252 | /* return the ATA registers to the caller.*/ |
| 2253 | req_task->io_ports[1] = reply->features; |
| 2254 | req_task->io_ports[2] = reply->sect_count; |
| 2255 | req_task->io_ports[3] = reply->lba_low; |
| 2256 | req_task->io_ports[4] = reply->lba_mid; |
| 2257 | req_task->io_ports[5] = reply->lba_hi; |
| 2258 | req_task->io_ports[6] = reply->device; |
| 2259 | |
| 2260 | if (req_task->out_flags.all & 1) { |
| 2261 | |
| 2262 | req_task->hob_ports[3] = reply->lba_low_ex; |
| 2263 | req_task->hob_ports[4] = reply->lba_mid_ex; |
| 2264 | req_task->hob_ports[5] = reply->lba_hi_ex; |
| 2265 | req_task->hob_ports[1] = reply->features_ex; |
| 2266 | req_task->hob_ports[2] = reply->sect_cnt_ex; |
| 2267 | } |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2268 | dbg_printk(MTIP_DRV_NAME |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 2269 | " %s: Completion: stat %x," |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2270 | "err %x, sect_cnt %x, lbalo %x," |
| 2271 | "lbamid %x, lbahi %x, dev %x\n", |
| 2272 | __func__, |
| 2273 | req_task->io_ports[7], |
| 2274 | req_task->io_ports[1], |
| 2275 | req_task->io_ports[2], |
| 2276 | req_task->io_ports[3], |
| 2277 | req_task->io_ports[4], |
| 2278 | req_task->io_ports[5], |
| 2279 | req_task->io_ports[6]); |
| 2280 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2281 | if (taskout) { |
| 2282 | if (copy_to_user(buf + outtotal, outbuf, taskout)) { |
| 2283 | err = -EFAULT; |
| 2284 | goto abort; |
| 2285 | } |
| 2286 | } |
| 2287 | if (taskin) { |
| 2288 | if (copy_to_user(buf + intotal, inbuf, taskin)) { |
| 2289 | err = -EFAULT; |
| 2290 | goto abort; |
| 2291 | } |
| 2292 | } |
| 2293 | abort: |
| 2294 | if (inbuf_dma) |
| 2295 | pci_unmap_single(dd->pdev, inbuf_dma, |
| 2296 | taskin, DMA_FROM_DEVICE); |
| 2297 | if (outbuf_dma) |
| 2298 | pci_unmap_single(dd->pdev, outbuf_dma, |
| 2299 | taskout, DMA_TO_DEVICE); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2300 | kfree(outbuf); |
| 2301 | kfree(inbuf); |
| 2302 | |
| 2303 | return err; |
| 2304 | } |
| 2305 | |
| 2306 | /* |
| 2307 | * Handle IOCTL calls from the Block Layer. |
| 2308 | * |
| 2309 | * This function is called by the Block Layer when it receives an IOCTL |
| 2310 | * command that it does not understand. If the IOCTL command is not supported |
| 2311 | * this function returns -ENOTTY. |
| 2312 | * |
| 2313 | * @dd Pointer to the driver data structure. |
| 2314 | * @cmd IOCTL command passed from the Block Layer. |
| 2315 | * @arg IOCTL argument passed from the Block Layer. |
| 2316 | * |
| 2317 | * return value |
| 2318 | * 0 The IOCTL completed successfully. |
| 2319 | * -ENOTTY The specified command is not supported. |
| 2320 | * -EFAULT An error occurred copying data to a user space buffer. |
| 2321 | * -EIO An error occurred while executing the command. |
| 2322 | */ |
Jens Axboe | ef0f158 | 2011-09-27 21:19:53 -0600 | [diff] [blame] | 2323 | static int mtip_hw_ioctl(struct driver_data *dd, unsigned int cmd, |
| 2324 | unsigned long arg) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2325 | { |
| 2326 | switch (cmd) { |
| 2327 | case HDIO_GET_IDENTITY: |
Asai Thambi S P | 971890f | 2012-05-29 18:41:47 -0700 | [diff] [blame] | 2328 | { |
| 2329 | if (copy_to_user((void __user *)arg, dd->port->identify, |
| 2330 | sizeof(u16) * ATA_ID_WORDS)) |
| 2331 | return -EFAULT; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2332 | break; |
Asai Thambi S P | 971890f | 2012-05-29 18:41:47 -0700 | [diff] [blame] | 2333 | } |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2334 | case HDIO_DRIVE_CMD: |
| 2335 | { |
| 2336 | u8 drive_command[4]; |
| 2337 | |
| 2338 | /* Copy the user command info to our buffer. */ |
| 2339 | if (copy_from_user(drive_command, |
| 2340 | (void __user *) arg, |
| 2341 | sizeof(drive_command))) |
| 2342 | return -EFAULT; |
| 2343 | |
| 2344 | /* Execute the drive command. */ |
| 2345 | if (exec_drive_command(dd->port, |
| 2346 | drive_command, |
| 2347 | (void __user *) (arg+4))) |
| 2348 | return -EIO; |
| 2349 | |
| 2350 | /* Copy the status back to the users buffer. */ |
| 2351 | if (copy_to_user((void __user *) arg, |
| 2352 | drive_command, |
| 2353 | sizeof(drive_command))) |
| 2354 | return -EFAULT; |
| 2355 | |
| 2356 | break; |
| 2357 | } |
| 2358 | case HDIO_DRIVE_TASK: |
| 2359 | { |
| 2360 | u8 drive_command[7]; |
| 2361 | |
| 2362 | /* Copy the user command info to our buffer. */ |
| 2363 | if (copy_from_user(drive_command, |
| 2364 | (void __user *) arg, |
| 2365 | sizeof(drive_command))) |
| 2366 | return -EFAULT; |
| 2367 | |
| 2368 | /* Execute the drive command. */ |
| 2369 | if (exec_drive_task(dd->port, drive_command)) |
| 2370 | return -EIO; |
| 2371 | |
| 2372 | /* Copy the status back to the users buffer. */ |
| 2373 | if (copy_to_user((void __user *) arg, |
| 2374 | drive_command, |
| 2375 | sizeof(drive_command))) |
| 2376 | return -EFAULT; |
| 2377 | |
| 2378 | break; |
| 2379 | } |
Jens Axboe | ef0f158 | 2011-09-27 21:19:53 -0600 | [diff] [blame] | 2380 | case HDIO_DRIVE_TASKFILE: { |
| 2381 | ide_task_request_t req_task; |
| 2382 | int ret, outtotal; |
| 2383 | |
| 2384 | if (copy_from_user(&req_task, (void __user *) arg, |
| 2385 | sizeof(req_task))) |
| 2386 | return -EFAULT; |
| 2387 | |
| 2388 | outtotal = sizeof(req_task); |
| 2389 | |
| 2390 | ret = exec_drive_taskfile(dd, (void __user *) arg, |
| 2391 | &req_task, outtotal); |
| 2392 | |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2393 | if (copy_to_user((void __user *) arg, &req_task, |
| 2394 | sizeof(req_task))) |
Jens Axboe | ef0f158 | 2011-09-27 21:19:53 -0600 | [diff] [blame] | 2395 | return -EFAULT; |
| 2396 | |
| 2397 | return ret; |
| 2398 | } |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2399 | |
| 2400 | default: |
| 2401 | return -EINVAL; |
| 2402 | } |
| 2403 | return 0; |
| 2404 | } |
| 2405 | |
| 2406 | /* |
| 2407 | * Submit an IO to the hw |
| 2408 | * |
| 2409 | * This function is called by the block layer to issue an io |
| 2410 | * to the device. Upon completion, the callback function will |
| 2411 | * be called with the data parameter passed as the callback data. |
| 2412 | * |
| 2413 | * @dd Pointer to the driver data structure. |
| 2414 | * @start First sector to read. |
| 2415 | * @nsect Number of sectors to read. |
| 2416 | * @nents Number of entries in scatter list for the read command. |
| 2417 | * @tag The tag of this read command. |
| 2418 | * @callback Pointer to the function that should be called |
| 2419 | * when the read completes. |
| 2420 | * @data Callback data passed to the callback function |
| 2421 | * when the read completes. |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2422 | * @dir Direction (read or write) |
| 2423 | * |
| 2424 | * return value |
| 2425 | * None |
| 2426 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 2427 | static void mtip_hw_submit_io(struct driver_data *dd, sector_t start, |
| 2428 | int nsect, int nents, int tag, void *callback, |
Asai Thambi S P | 4e8670e | 2012-02-07 07:54:31 +0100 | [diff] [blame] | 2429 | void *data, int dir) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2430 | { |
| 2431 | struct host_to_dev_fis *fis; |
| 2432 | struct mtip_port *port = dd->port; |
| 2433 | struct mtip_cmd *command = &port->commands[tag]; |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2434 | int dma_dir = (dir == READ) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2435 | |
| 2436 | /* Map the scatter list for DMA access */ |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2437 | nents = dma_map_sg(&dd->pdev->dev, command->sg, nents, dma_dir); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2438 | |
| 2439 | command->scatter_ents = nents; |
| 2440 | |
| 2441 | /* |
| 2442 | * The number of retries for this command before it is |
| 2443 | * reported as a failure to the upper layers. |
| 2444 | */ |
| 2445 | command->retries = MTIP_MAX_RETRIES; |
| 2446 | |
| 2447 | /* Fill out fis */ |
| 2448 | fis = command->command; |
| 2449 | fis->type = 0x27; |
| 2450 | fis->opts = 1 << 7; |
| 2451 | fis->command = |
| 2452 | (dir == READ ? ATA_CMD_FPDMA_READ : ATA_CMD_FPDMA_WRITE); |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2453 | *((unsigned int *) &fis->lba_low) = (start & 0xFFFFFF); |
| 2454 | *((unsigned int *) &fis->lba_low_ex) = ((start >> 24) & 0xFFFFFF); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2455 | fis->device = 1 << 6; |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2456 | fis->features = nsect & 0xFF; |
| 2457 | fis->features_ex = (nsect >> 8) & 0xFF; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2458 | fis->sect_count = ((tag << 3) | (tag >> 5)); |
| 2459 | fis->sect_cnt_ex = 0; |
| 2460 | fis->control = 0; |
| 2461 | fis->res2 = 0; |
| 2462 | fis->res3 = 0; |
| 2463 | fill_command_sg(dd, command, nents); |
| 2464 | |
| 2465 | /* Populate the command header */ |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2466 | command->command_header->opts = |
| 2467 | __force_bit2int cpu_to_le32( |
| 2468 | (nents << 16) | 5 | AHCI_CMD_PREFETCH); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2469 | command->command_header->byte_count = 0; |
| 2470 | |
| 2471 | /* |
| 2472 | * Set the completion function and data for the command |
| 2473 | * within this layer. |
| 2474 | */ |
| 2475 | command->comp_data = dd; |
| 2476 | command->comp_func = mtip_async_complete; |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2477 | command->direction = dma_dir; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2478 | |
| 2479 | /* |
| 2480 | * Set the completion function and data for the command passed |
| 2481 | * from the upper layer. |
| 2482 | */ |
| 2483 | command->async_data = data; |
| 2484 | command->async_callback = callback; |
| 2485 | |
| 2486 | /* |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2487 | * To prevent this command from being issued |
| 2488 | * if an internal command is in progress or error handling is active. |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2489 | */ |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 2490 | if (port->flags & MTIP_PF_PAUSE_IO) { |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2491 | set_bit(tag, port->cmds_to_issue); |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2492 | set_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags); |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2493 | return; |
| 2494 | } |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2495 | |
| 2496 | /* Issue the command to the hardware */ |
| 2497 | mtip_issue_ncq_command(port, tag); |
| 2498 | |
Asai Thambi S P | dad40f1 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2499 | return; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2500 | } |
| 2501 | |
| 2502 | /* |
| 2503 | * Release a command slot. |
| 2504 | * |
| 2505 | * @dd Pointer to the driver data structure. |
| 2506 | * @tag Slot tag |
| 2507 | * |
| 2508 | * return value |
| 2509 | * None |
| 2510 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 2511 | static void mtip_hw_release_scatterlist(struct driver_data *dd, int tag) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2512 | { |
| 2513 | release_slot(dd->port, tag); |
| 2514 | } |
| 2515 | |
| 2516 | /* |
| 2517 | * Obtain a command slot and return its associated scatter list. |
| 2518 | * |
| 2519 | * @dd Pointer to the driver data structure. |
| 2520 | * @tag Pointer to an int that will receive the allocated command |
| 2521 | * slot tag. |
| 2522 | * |
| 2523 | * return value |
| 2524 | * Pointer to the scatter list for the allocated command slot |
| 2525 | * or NULL if no command slots are available. |
| 2526 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 2527 | static struct scatterlist *mtip_hw_get_scatterlist(struct driver_data *dd, |
| 2528 | int *tag) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2529 | { |
| 2530 | /* |
| 2531 | * It is possible that, even with this semaphore, a thread |
| 2532 | * may think that no command slots are available. Therefore, we |
| 2533 | * need to make an attempt to get_slot(). |
| 2534 | */ |
| 2535 | down(&dd->port->cmd_slot); |
| 2536 | *tag = get_slot(dd->port); |
| 2537 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2538 | if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag))) { |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2539 | up(&dd->port->cmd_slot); |
| 2540 | return NULL; |
| 2541 | } |
Asai Thambi S P | a09ba13 | 2012-04-16 21:27:55 +0200 | [diff] [blame] | 2542 | if (unlikely(*tag < 0)) { |
| 2543 | up(&dd->port->cmd_slot); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2544 | return NULL; |
Asai Thambi S P | a09ba13 | 2012-04-16 21:27:55 +0200 | [diff] [blame] | 2545 | } |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2546 | |
| 2547 | return dd->port->commands[*tag].sg; |
| 2548 | } |
| 2549 | |
| 2550 | /* |
Asai Thambi S P | 7412ff1 | 2012-06-04 12:43:03 -0700 | [diff] [blame] | 2551 | * Sysfs status dump. |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2552 | * |
| 2553 | * @dev Pointer to the device structure, passed by the kernrel. |
| 2554 | * @attr Pointer to the device_attribute structure passed by the kernel. |
| 2555 | * @buf Pointer to the char buffer that will receive the stats info. |
| 2556 | * |
| 2557 | * return value |
| 2558 | * The size, in bytes, of the data copied into buf. |
| 2559 | */ |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2560 | static ssize_t mtip_hw_show_status(struct device *dev, |
| 2561 | struct device_attribute *attr, |
| 2562 | char *buf) |
| 2563 | { |
| 2564 | struct driver_data *dd = dev_to_disk(dev)->private_data; |
| 2565 | int size = 0; |
| 2566 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2567 | if (test_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag)) |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2568 | size += sprintf(buf, "%s", "thermal_shutdown\n"); |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2569 | else if (test_bit(MTIP_DDF_WRITE_PROTECT_BIT, &dd->dd_flag)) |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2570 | size += sprintf(buf, "%s", "write_protect\n"); |
| 2571 | else |
| 2572 | size += sprintf(buf, "%s", "online\n"); |
| 2573 | |
| 2574 | return size; |
| 2575 | } |
| 2576 | |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2577 | static DEVICE_ATTR(status, S_IRUGO, mtip_hw_show_status, NULL); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2578 | |
Asai Thambi S P | 7b421d2 | 2012-06-04 12:44:02 -0700 | [diff] [blame] | 2579 | static ssize_t mtip_hw_read_registers(struct file *f, char __user *ubuf, |
| 2580 | size_t len, loff_t *offset) |
| 2581 | { |
| 2582 | struct driver_data *dd = (struct driver_data *)f->private_data; |
| 2583 | char buf[MTIP_DFS_MAX_BUF_SIZE]; |
| 2584 | u32 group_allocated; |
| 2585 | int size = *offset; |
| 2586 | int n; |
| 2587 | |
| 2588 | if (!len || size) |
| 2589 | return 0; |
| 2590 | |
| 2591 | if (size < 0) |
| 2592 | return -EINVAL; |
| 2593 | |
| 2594 | size += sprintf(&buf[size], "H/ S ACTive : [ 0x"); |
| 2595 | |
| 2596 | for (n = dd->slot_groups-1; n >= 0; n--) |
| 2597 | size += sprintf(&buf[size], "%08X ", |
| 2598 | readl(dd->port->s_active[n])); |
| 2599 | |
| 2600 | size += sprintf(&buf[size], "]\n"); |
| 2601 | size += sprintf(&buf[size], "H/ Command Issue : [ 0x"); |
| 2602 | |
| 2603 | for (n = dd->slot_groups-1; n >= 0; n--) |
| 2604 | size += sprintf(&buf[size], "%08X ", |
| 2605 | readl(dd->port->cmd_issue[n])); |
| 2606 | |
| 2607 | size += sprintf(&buf[size], "]\n"); |
| 2608 | size += sprintf(&buf[size], "H/ Completed : [ 0x"); |
| 2609 | |
| 2610 | for (n = dd->slot_groups-1; n >= 0; n--) |
| 2611 | size += sprintf(&buf[size], "%08X ", |
| 2612 | readl(dd->port->completed[n])); |
| 2613 | |
| 2614 | size += sprintf(&buf[size], "]\n"); |
| 2615 | size += sprintf(&buf[size], "H/ PORT IRQ STAT : [ 0x%08X ]\n", |
| 2616 | readl(dd->port->mmio + PORT_IRQ_STAT)); |
| 2617 | size += sprintf(&buf[size], "H/ HOST IRQ STAT : [ 0x%08X ]\n", |
| 2618 | readl(dd->mmio + HOST_IRQ_STAT)); |
| 2619 | size += sprintf(&buf[size], "\n"); |
| 2620 | |
| 2621 | size += sprintf(&buf[size], "L/ Allocated : [ 0x"); |
| 2622 | |
| 2623 | for (n = dd->slot_groups-1; n >= 0; n--) { |
| 2624 | if (sizeof(long) > sizeof(u32)) |
| 2625 | group_allocated = |
| 2626 | dd->port->allocated[n/2] >> (32*(n&1)); |
| 2627 | else |
| 2628 | group_allocated = dd->port->allocated[n]; |
| 2629 | size += sprintf(&buf[size], "%08X ", group_allocated); |
| 2630 | } |
| 2631 | size += sprintf(&buf[size], "]\n"); |
| 2632 | |
| 2633 | size += sprintf(&buf[size], "L/ Commands in Q : [ 0x"); |
| 2634 | |
| 2635 | for (n = dd->slot_groups-1; n >= 0; n--) { |
| 2636 | if (sizeof(long) > sizeof(u32)) |
| 2637 | group_allocated = |
| 2638 | dd->port->cmds_to_issue[n/2] >> (32*(n&1)); |
| 2639 | else |
| 2640 | group_allocated = dd->port->cmds_to_issue[n]; |
| 2641 | size += sprintf(&buf[size], "%08X ", group_allocated); |
| 2642 | } |
| 2643 | size += sprintf(&buf[size], "]\n"); |
| 2644 | |
| 2645 | *offset = size <= len ? size : len; |
| 2646 | size = copy_to_user(ubuf, buf, *offset); |
| 2647 | if (size) |
| 2648 | return -EFAULT; |
| 2649 | |
| 2650 | return *offset; |
| 2651 | } |
| 2652 | |
| 2653 | static ssize_t mtip_hw_read_flags(struct file *f, char __user *ubuf, |
| 2654 | size_t len, loff_t *offset) |
| 2655 | { |
| 2656 | struct driver_data *dd = (struct driver_data *)f->private_data; |
| 2657 | char buf[MTIP_DFS_MAX_BUF_SIZE]; |
| 2658 | int size = *offset; |
| 2659 | |
| 2660 | if (!len || size) |
| 2661 | return 0; |
| 2662 | |
| 2663 | if (size < 0) |
| 2664 | return -EINVAL; |
| 2665 | |
| 2666 | size += sprintf(&buf[size], "Flag-port : [ %08lX ]\n", |
| 2667 | dd->port->flags); |
| 2668 | size += sprintf(&buf[size], "Flag-dd : [ %08lX ]\n", |
| 2669 | dd->dd_flag); |
| 2670 | |
| 2671 | *offset = size <= len ? size : len; |
| 2672 | size = copy_to_user(ubuf, buf, *offset); |
| 2673 | if (size) |
| 2674 | return -EFAULT; |
| 2675 | |
| 2676 | return *offset; |
| 2677 | } |
| 2678 | |
| 2679 | static const struct file_operations mtip_regs_fops = { |
| 2680 | .owner = THIS_MODULE, |
| 2681 | .open = simple_open, |
| 2682 | .read = mtip_hw_read_registers, |
| 2683 | .llseek = no_llseek, |
| 2684 | }; |
| 2685 | |
| 2686 | static const struct file_operations mtip_flags_fops = { |
| 2687 | .owner = THIS_MODULE, |
| 2688 | .open = simple_open, |
| 2689 | .read = mtip_hw_read_flags, |
| 2690 | .llseek = no_llseek, |
| 2691 | }; |
| 2692 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2693 | /* |
| 2694 | * Create the sysfs related attributes. |
| 2695 | * |
| 2696 | * @dd Pointer to the driver data structure. |
| 2697 | * @kobj Pointer to the kobj for the block device. |
| 2698 | * |
| 2699 | * return value |
| 2700 | * 0 Operation completed successfully. |
| 2701 | * -EINVAL Invalid parameter. |
| 2702 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 2703 | static int mtip_hw_sysfs_init(struct driver_data *dd, struct kobject *kobj) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2704 | { |
| 2705 | if (!kobj || !dd) |
| 2706 | return -EINVAL; |
| 2707 | |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2708 | if (sysfs_create_file(kobj, &dev_attr_status.attr)) |
| 2709 | dev_warn(&dd->pdev->dev, |
| 2710 | "Error creating 'status' sysfs entry\n"); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2711 | return 0; |
| 2712 | } |
| 2713 | |
| 2714 | /* |
| 2715 | * Remove the sysfs related attributes. |
| 2716 | * |
| 2717 | * @dd Pointer to the driver data structure. |
| 2718 | * @kobj Pointer to the kobj for the block device. |
| 2719 | * |
| 2720 | * return value |
| 2721 | * 0 Operation completed successfully. |
| 2722 | * -EINVAL Invalid parameter. |
| 2723 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 2724 | static int mtip_hw_sysfs_exit(struct driver_data *dd, struct kobject *kobj) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2725 | { |
| 2726 | if (!kobj || !dd) |
| 2727 | return -EINVAL; |
| 2728 | |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2729 | sysfs_remove_file(kobj, &dev_attr_status.attr); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2730 | |
| 2731 | return 0; |
| 2732 | } |
| 2733 | |
Asai Thambi S P | 7b421d2 | 2012-06-04 12:44:02 -0700 | [diff] [blame] | 2734 | static int mtip_hw_debugfs_init(struct driver_data *dd) |
| 2735 | { |
| 2736 | if (!dfs_parent) |
| 2737 | return -1; |
| 2738 | |
| 2739 | dd->dfs_node = debugfs_create_dir(dd->disk->disk_name, dfs_parent); |
| 2740 | if (IS_ERR_OR_NULL(dd->dfs_node)) { |
| 2741 | dev_warn(&dd->pdev->dev, |
| 2742 | "Error creating node %s under debugfs\n", |
| 2743 | dd->disk->disk_name); |
| 2744 | dd->dfs_node = NULL; |
| 2745 | return -1; |
| 2746 | } |
| 2747 | |
| 2748 | debugfs_create_file("flags", S_IRUGO, dd->dfs_node, dd, |
| 2749 | &mtip_flags_fops); |
| 2750 | debugfs_create_file("registers", S_IRUGO, dd->dfs_node, dd, |
| 2751 | &mtip_regs_fops); |
| 2752 | |
| 2753 | return 0; |
| 2754 | } |
| 2755 | |
| 2756 | static void mtip_hw_debugfs_exit(struct driver_data *dd) |
| 2757 | { |
| 2758 | debugfs_remove_recursive(dd->dfs_node); |
| 2759 | } |
| 2760 | |
| 2761 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2762 | /* |
| 2763 | * Perform any init/resume time hardware setup |
| 2764 | * |
| 2765 | * @dd Pointer to the driver data structure. |
| 2766 | * |
| 2767 | * return value |
| 2768 | * None |
| 2769 | */ |
| 2770 | static inline void hba_setup(struct driver_data *dd) |
| 2771 | { |
| 2772 | u32 hwdata; |
| 2773 | hwdata = readl(dd->mmio + HOST_HSORG); |
| 2774 | |
| 2775 | /* interrupt bug workaround: use only 1 IS bit.*/ |
| 2776 | writel(hwdata | |
| 2777 | HSORG_DISABLE_SLOTGRP_INTR | |
| 2778 | HSORG_DISABLE_SLOTGRP_PXIS, |
| 2779 | dd->mmio + HOST_HSORG); |
| 2780 | } |
| 2781 | |
| 2782 | /* |
| 2783 | * Detect the details of the product, and store anything needed |
| 2784 | * into the driver data structure. This includes product type and |
| 2785 | * version and number of slot groups. |
| 2786 | * |
| 2787 | * @dd Pointer to the driver data structure. |
| 2788 | * |
| 2789 | * return value |
| 2790 | * None |
| 2791 | */ |
| 2792 | static void mtip_detect_product(struct driver_data *dd) |
| 2793 | { |
| 2794 | u32 hwdata; |
| 2795 | unsigned int rev, slotgroups; |
| 2796 | |
| 2797 | /* |
| 2798 | * HBA base + 0xFC [15:0] - vendor-specific hardware interface |
| 2799 | * info register: |
| 2800 | * [15:8] hardware/software interface rev# |
| 2801 | * [ 3] asic-style interface |
| 2802 | * [ 2:0] number of slot groups, minus 1 (only valid for asic-style). |
| 2803 | */ |
| 2804 | hwdata = readl(dd->mmio + HOST_HSORG); |
| 2805 | |
| 2806 | dd->product_type = MTIP_PRODUCT_UNKNOWN; |
| 2807 | dd->slot_groups = 1; |
| 2808 | |
| 2809 | if (hwdata & 0x8) { |
| 2810 | dd->product_type = MTIP_PRODUCT_ASICFPGA; |
| 2811 | rev = (hwdata & HSORG_HWREV) >> 8; |
| 2812 | slotgroups = (hwdata & HSORG_SLOTGROUPS) + 1; |
| 2813 | dev_info(&dd->pdev->dev, |
| 2814 | "ASIC-FPGA design, HS rev 0x%x, " |
| 2815 | "%i slot groups [%i slots]\n", |
| 2816 | rev, |
| 2817 | slotgroups, |
| 2818 | slotgroups * 32); |
| 2819 | |
| 2820 | if (slotgroups > MTIP_MAX_SLOT_GROUPS) { |
| 2821 | dev_warn(&dd->pdev->dev, |
| 2822 | "Warning: driver only supports " |
| 2823 | "%i slot groups.\n", MTIP_MAX_SLOT_GROUPS); |
| 2824 | slotgroups = MTIP_MAX_SLOT_GROUPS; |
| 2825 | } |
| 2826 | dd->slot_groups = slotgroups; |
| 2827 | return; |
| 2828 | } |
| 2829 | |
| 2830 | dev_warn(&dd->pdev->dev, "Unrecognized product id\n"); |
| 2831 | } |
| 2832 | |
| 2833 | /* |
| 2834 | * Blocking wait for FTL rebuild to complete |
| 2835 | * |
| 2836 | * @dd Pointer to the DRIVER_DATA structure. |
| 2837 | * |
| 2838 | * return value |
| 2839 | * 0 FTL rebuild completed successfully |
| 2840 | * -EFAULT FTL rebuild error/timeout/interruption |
| 2841 | */ |
| 2842 | static int mtip_ftl_rebuild_poll(struct driver_data *dd) |
| 2843 | { |
| 2844 | unsigned long timeout, cnt = 0, start; |
| 2845 | |
| 2846 | dev_warn(&dd->pdev->dev, |
| 2847 | "FTL rebuild in progress. Polling for completion.\n"); |
| 2848 | |
| 2849 | start = jiffies; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2850 | timeout = jiffies + msecs_to_jiffies(MTIP_FTL_REBUILD_TIMEOUT_MS); |
| 2851 | |
| 2852 | do { |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2853 | if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2854 | &dd->dd_flag))) |
| 2855 | return -EFAULT; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2856 | if (mtip_check_surprise_removal(dd->pdev)) |
| 2857 | return -EFAULT; |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2858 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2859 | if (mtip_get_identify(dd->port, NULL) < 0) |
| 2860 | return -EFAULT; |
| 2861 | |
| 2862 | if (*(dd->port->identify + MTIP_FTL_REBUILD_OFFSET) == |
| 2863 | MTIP_FTL_REBUILD_MAGIC) { |
| 2864 | ssleep(1); |
| 2865 | /* Print message every 3 minutes */ |
| 2866 | if (cnt++ >= 180) { |
| 2867 | dev_warn(&dd->pdev->dev, |
| 2868 | "FTL rebuild in progress (%d secs).\n", |
| 2869 | jiffies_to_msecs(jiffies - start) / 1000); |
| 2870 | cnt = 0; |
| 2871 | } |
| 2872 | } else { |
| 2873 | dev_warn(&dd->pdev->dev, |
| 2874 | "FTL rebuild complete (%d secs).\n", |
| 2875 | jiffies_to_msecs(jiffies - start) / 1000); |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 2876 | mtip_block_initialize(dd); |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2877 | return 0; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2878 | } |
| 2879 | ssleep(10); |
| 2880 | } while (time_before(jiffies, timeout)); |
| 2881 | |
| 2882 | /* Check for timeout */ |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2883 | dev_err(&dd->pdev->dev, |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2884 | "Timed out waiting for FTL rebuild to complete (%d secs).\n", |
| 2885 | jiffies_to_msecs(jiffies - start) / 1000); |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2886 | return -EFAULT; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2887 | } |
| 2888 | |
| 2889 | /* |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2890 | * service thread to issue queued commands |
| 2891 | * |
| 2892 | * @data Pointer to the driver data structure. |
| 2893 | * |
| 2894 | * return value |
| 2895 | * 0 |
| 2896 | */ |
| 2897 | |
| 2898 | static int mtip_service_thread(void *data) |
| 2899 | { |
| 2900 | struct driver_data *dd = (struct driver_data *)data; |
| 2901 | unsigned long slot, slot_start, slot_wrap; |
| 2902 | unsigned int num_cmd_slots = dd->slot_groups * 32; |
| 2903 | struct mtip_port *port = dd->port; |
| 2904 | |
| 2905 | while (1) { |
| 2906 | /* |
| 2907 | * the condition is to check neither an internal command is |
| 2908 | * is in progress nor error handling is active |
| 2909 | */ |
| 2910 | wait_event_interruptible(port->svc_wait, (port->flags) && |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 2911 | !(port->flags & MTIP_PF_PAUSE_IO)); |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2912 | |
| 2913 | if (kthread_should_stop()) |
| 2914 | break; |
| 2915 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2916 | if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2917 | &dd->dd_flag))) |
| 2918 | break; |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 2919 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2920 | set_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags); |
| 2921 | if (test_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags)) { |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2922 | slot = 1; |
| 2923 | /* used to restrict the loop to one iteration */ |
| 2924 | slot_start = num_cmd_slots; |
| 2925 | slot_wrap = 0; |
| 2926 | while (1) { |
| 2927 | slot = find_next_bit(port->cmds_to_issue, |
| 2928 | num_cmd_slots, slot); |
| 2929 | if (slot_wrap == 1) { |
| 2930 | if ((slot_start >= slot) || |
| 2931 | (slot >= num_cmd_slots)) |
| 2932 | break; |
| 2933 | } |
| 2934 | if (unlikely(slot_start == num_cmd_slots)) |
| 2935 | slot_start = slot; |
| 2936 | |
| 2937 | if (unlikely(slot == num_cmd_slots)) { |
| 2938 | slot = 1; |
| 2939 | slot_wrap = 1; |
| 2940 | continue; |
| 2941 | } |
| 2942 | |
| 2943 | /* Issue the command to the hardware */ |
| 2944 | mtip_issue_ncq_command(port, slot); |
| 2945 | |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2946 | clear_bit(slot, port->cmds_to_issue); |
| 2947 | } |
| 2948 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2949 | clear_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags); |
| 2950 | } else if (test_bit(MTIP_PF_REBUILD_BIT, &port->flags)) { |
Asai Thambi S P | 8182b49 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2951 | if (!mtip_ftl_rebuild_poll(dd)) |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2952 | set_bit(MTIP_DDF_REBUILD_FAILED_BIT, |
Asai Thambi S P | 8182b49 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2953 | &dd->dd_flag); |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2954 | clear_bit(MTIP_PF_REBUILD_BIT, &port->flags); |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2955 | } |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2956 | clear_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags); |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 2957 | |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 2958 | if (test_bit(MTIP_PF_SVC_THD_STOP_BIT, &port->flags)) |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 2959 | break; |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2960 | } |
| 2961 | return 0; |
| 2962 | } |
| 2963 | |
| 2964 | /* |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2965 | * Called once for each card. |
| 2966 | * |
| 2967 | * @dd Pointer to the driver data structure. |
| 2968 | * |
| 2969 | * return value |
| 2970 | * 0 on success, else an error code. |
| 2971 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 2972 | static int mtip_hw_init(struct driver_data *dd) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2973 | { |
| 2974 | int i; |
| 2975 | int rv; |
| 2976 | unsigned int num_command_slots; |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2977 | unsigned long timeout, timetaken; |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2978 | unsigned char *buf; |
| 2979 | struct smart_attr attr242; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2980 | |
| 2981 | dd->mmio = pcim_iomap_table(dd->pdev)[MTIP_ABAR]; |
| 2982 | |
| 2983 | mtip_detect_product(dd); |
| 2984 | if (dd->product_type == MTIP_PRODUCT_UNKNOWN) { |
| 2985 | rv = -EIO; |
| 2986 | goto out1; |
| 2987 | } |
| 2988 | num_command_slots = dd->slot_groups * 32; |
| 2989 | |
| 2990 | hba_setup(dd); |
| 2991 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2992 | tasklet_init(&dd->tasklet, mtip_tasklet, (unsigned long)dd); |
| 2993 | |
| 2994 | dd->port = kzalloc(sizeof(struct mtip_port), GFP_KERNEL); |
| 2995 | if (!dd->port) { |
| 2996 | dev_err(&dd->pdev->dev, |
| 2997 | "Memory allocation: port structure\n"); |
| 2998 | return -ENOMEM; |
| 2999 | } |
| 3000 | |
| 3001 | /* Counting semaphore to track command slot usage */ |
| 3002 | sema_init(&dd->port->cmd_slot, num_command_slots - 1); |
| 3003 | |
| 3004 | /* Spinlock to prevent concurrent issue */ |
| 3005 | spin_lock_init(&dd->port->cmd_issue_lock); |
| 3006 | |
| 3007 | /* Set the port mmio base address. */ |
| 3008 | dd->port->mmio = dd->mmio + PORT_OFFSET; |
| 3009 | dd->port->dd = dd; |
| 3010 | |
| 3011 | /* Allocate memory for the command list. */ |
| 3012 | dd->port->command_list = |
| 3013 | dmam_alloc_coherent(&dd->pdev->dev, |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3014 | HW_PORT_PRIV_DMA_SZ + (ATA_SECT_SIZE * 4), |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3015 | &dd->port->command_list_dma, |
| 3016 | GFP_KERNEL); |
| 3017 | if (!dd->port->command_list) { |
| 3018 | dev_err(&dd->pdev->dev, |
| 3019 | "Memory allocation: command list\n"); |
| 3020 | rv = -ENOMEM; |
| 3021 | goto out1; |
| 3022 | } |
| 3023 | |
| 3024 | /* Clear the memory we have allocated. */ |
| 3025 | memset(dd->port->command_list, |
| 3026 | 0, |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3027 | HW_PORT_PRIV_DMA_SZ + (ATA_SECT_SIZE * 4)); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3028 | |
| 3029 | /* Setup the addresse of the RX FIS. */ |
| 3030 | dd->port->rxfis = dd->port->command_list + HW_CMD_SLOT_SZ; |
| 3031 | dd->port->rxfis_dma = dd->port->command_list_dma + HW_CMD_SLOT_SZ; |
| 3032 | |
| 3033 | /* Setup the address of the command tables. */ |
| 3034 | dd->port->command_table = dd->port->rxfis + AHCI_RX_FIS_SZ; |
| 3035 | dd->port->command_tbl_dma = dd->port->rxfis_dma + AHCI_RX_FIS_SZ; |
| 3036 | |
| 3037 | /* Setup the address of the identify data. */ |
| 3038 | dd->port->identify = dd->port->command_table + |
| 3039 | HW_CMD_TBL_AR_SZ; |
| 3040 | dd->port->identify_dma = dd->port->command_tbl_dma + |
| 3041 | HW_CMD_TBL_AR_SZ; |
| 3042 | |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3043 | /* Setup the address of the sector buffer - for some non-ncq cmds */ |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3044 | dd->port->sector_buffer = (void *) dd->port->identify + ATA_SECT_SIZE; |
| 3045 | dd->port->sector_buffer_dma = dd->port->identify_dma + ATA_SECT_SIZE; |
| 3046 | |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3047 | /* Setup the address of the log buf - for read log command */ |
| 3048 | dd->port->log_buf = (void *)dd->port->sector_buffer + ATA_SECT_SIZE; |
| 3049 | dd->port->log_buf_dma = dd->port->sector_buffer_dma + ATA_SECT_SIZE; |
| 3050 | |
| 3051 | /* Setup the address of the smart buf - for smart read data command */ |
| 3052 | dd->port->smart_buf = (void *)dd->port->log_buf + ATA_SECT_SIZE; |
| 3053 | dd->port->smart_buf_dma = dd->port->log_buf_dma + ATA_SECT_SIZE; |
| 3054 | |
| 3055 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3056 | /* Point the command headers at the command tables. */ |
| 3057 | for (i = 0; i < num_command_slots; i++) { |
| 3058 | dd->port->commands[i].command_header = |
| 3059 | dd->port->command_list + |
| 3060 | (sizeof(struct mtip_cmd_hdr) * i); |
| 3061 | dd->port->commands[i].command_header_dma = |
| 3062 | dd->port->command_list_dma + |
| 3063 | (sizeof(struct mtip_cmd_hdr) * i); |
| 3064 | |
| 3065 | dd->port->commands[i].command = |
| 3066 | dd->port->command_table + (HW_CMD_TBL_SZ * i); |
| 3067 | dd->port->commands[i].command_dma = |
| 3068 | dd->port->command_tbl_dma + (HW_CMD_TBL_SZ * i); |
| 3069 | |
| 3070 | if (readl(dd->mmio + HOST_CAP) & HOST_CAP_64) |
| 3071 | dd->port->commands[i].command_header->ctbau = |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 3072 | __force_bit2int cpu_to_le32( |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3073 | (dd->port->commands[i].command_dma >> 16) >> 16); |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 3074 | dd->port->commands[i].command_header->ctba = |
| 3075 | __force_bit2int cpu_to_le32( |
| 3076 | dd->port->commands[i].command_dma & 0xFFFFFFFF); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3077 | |
| 3078 | /* |
| 3079 | * If this is not done, a bug is reported by the stock |
| 3080 | * FC11 i386. Due to the fact that it has lots of kernel |
| 3081 | * debugging enabled. |
| 3082 | */ |
| 3083 | sg_init_table(dd->port->commands[i].sg, MTIP_MAX_SG); |
| 3084 | |
| 3085 | /* Mark all commands as currently inactive.*/ |
| 3086 | atomic_set(&dd->port->commands[i].active, 0); |
| 3087 | } |
| 3088 | |
| 3089 | /* Setup the pointers to the extended s_active and CI registers. */ |
| 3090 | for (i = 0; i < dd->slot_groups; i++) { |
| 3091 | dd->port->s_active[i] = |
| 3092 | dd->port->mmio + i*0x80 + PORT_SCR_ACT; |
| 3093 | dd->port->cmd_issue[i] = |
| 3094 | dd->port->mmio + i*0x80 + PORT_COMMAND_ISSUE; |
| 3095 | dd->port->completed[i] = |
| 3096 | dd->port->mmio + i*0x80 + PORT_SDBV; |
| 3097 | } |
| 3098 | |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3099 | timetaken = jiffies; |
| 3100 | timeout = jiffies + msecs_to_jiffies(30000); |
| 3101 | while (((readl(dd->port->mmio + PORT_SCR_STAT) & 0x0F) != 0x03) && |
| 3102 | time_before(jiffies, timeout)) { |
| 3103 | mdelay(100); |
| 3104 | } |
| 3105 | if (unlikely(mtip_check_surprise_removal(dd->pdev))) { |
| 3106 | timetaken = jiffies - timetaken; |
| 3107 | dev_warn(&dd->pdev->dev, |
| 3108 | "Surprise removal detected at %u ms\n", |
| 3109 | jiffies_to_msecs(timetaken)); |
| 3110 | rv = -ENODEV; |
| 3111 | goto out2 ; |
| 3112 | } |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3113 | if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag))) { |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3114 | timetaken = jiffies - timetaken; |
| 3115 | dev_warn(&dd->pdev->dev, |
| 3116 | "Removal detected at %u ms\n", |
| 3117 | jiffies_to_msecs(timetaken)); |
| 3118 | rv = -EFAULT; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3119 | goto out2; |
| 3120 | } |
| 3121 | |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3122 | /* Conditionally reset the HBA. */ |
| 3123 | if (!(readl(dd->mmio + HOST_CAP) & HOST_CAP_NZDMA)) { |
| 3124 | if (mtip_hba_reset(dd) < 0) { |
| 3125 | dev_err(&dd->pdev->dev, |
| 3126 | "Card did not reset within timeout\n"); |
| 3127 | rv = -EIO; |
| 3128 | goto out2; |
| 3129 | } |
| 3130 | } else { |
| 3131 | /* Clear any pending interrupts on the HBA */ |
| 3132 | writel(readl(dd->mmio + HOST_IRQ_STAT), |
| 3133 | dd->mmio + HOST_IRQ_STAT); |
| 3134 | } |
| 3135 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3136 | mtip_init_port(dd->port); |
| 3137 | mtip_start_port(dd->port); |
| 3138 | |
| 3139 | /* Setup the ISR and enable interrupts. */ |
| 3140 | rv = devm_request_irq(&dd->pdev->dev, |
| 3141 | dd->pdev->irq, |
| 3142 | mtip_irq_handler, |
| 3143 | IRQF_SHARED, |
| 3144 | dev_driver_string(&dd->pdev->dev), |
| 3145 | dd); |
| 3146 | |
| 3147 | if (rv) { |
| 3148 | dev_err(&dd->pdev->dev, |
| 3149 | "Unable to allocate IRQ %d\n", dd->pdev->irq); |
| 3150 | goto out2; |
| 3151 | } |
| 3152 | |
| 3153 | /* Enable interrupts on the HBA. */ |
| 3154 | writel(readl(dd->mmio + HOST_CTL) | HOST_IRQ_EN, |
| 3155 | dd->mmio + HOST_CTL); |
| 3156 | |
| 3157 | init_timer(&dd->port->cmd_timer); |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 3158 | init_waitqueue_head(&dd->port->svc_wait); |
| 3159 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3160 | dd->port->cmd_timer.data = (unsigned long int) dd->port; |
| 3161 | dd->port->cmd_timer.function = mtip_timeout_function; |
| 3162 | mod_timer(&dd->port->cmd_timer, |
| 3163 | jiffies + msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD)); |
| 3164 | |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3165 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3166 | if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)) { |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3167 | rv = -EFAULT; |
| 3168 | goto out3; |
| 3169 | } |
| 3170 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3171 | if (mtip_get_identify(dd->port, NULL) < 0) { |
| 3172 | rv = -EFAULT; |
| 3173 | goto out3; |
| 3174 | } |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3175 | |
| 3176 | if (*(dd->port->identify + MTIP_FTL_REBUILD_OFFSET) == |
| 3177 | MTIP_FTL_REBUILD_MAGIC) { |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3178 | set_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags); |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 3179 | return MTIP_FTL_REBUILD_MAGIC; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3180 | } |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 3181 | mtip_dump_identify(dd->port); |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3182 | |
| 3183 | /* check write protect, over temp and rebuild statuses */ |
| 3184 | rv = mtip_read_log_page(dd->port, ATA_LOG_SATA_NCQ, |
| 3185 | dd->port->log_buf, |
| 3186 | dd->port->log_buf_dma, 1); |
| 3187 | if (rv) { |
| 3188 | dev_warn(&dd->pdev->dev, |
| 3189 | "Error in READ LOG EXT (10h) command\n"); |
| 3190 | /* non-critical error, don't fail the load */ |
| 3191 | } else { |
| 3192 | buf = (unsigned char *)dd->port->log_buf; |
| 3193 | if (buf[259] & 0x1) { |
| 3194 | dev_info(&dd->pdev->dev, |
| 3195 | "Write protect bit is set.\n"); |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3196 | set_bit(MTIP_DDF_WRITE_PROTECT_BIT, &dd->dd_flag); |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3197 | } |
| 3198 | if (buf[288] == 0xF7) { |
| 3199 | dev_info(&dd->pdev->dev, |
| 3200 | "Exceeded Tmax, drive in thermal shutdown.\n"); |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3201 | set_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag); |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3202 | } |
| 3203 | if (buf[288] == 0xBF) { |
| 3204 | dev_info(&dd->pdev->dev, |
| 3205 | "Drive indicates rebuild has failed.\n"); |
| 3206 | /* TODO */ |
| 3207 | } |
| 3208 | } |
| 3209 | |
| 3210 | /* get write protect progess */ |
| 3211 | memset(&attr242, 0, sizeof(struct smart_attr)); |
| 3212 | if (mtip_get_smart_attr(dd->port, 242, &attr242)) |
| 3213 | dev_warn(&dd->pdev->dev, |
| 3214 | "Unable to check write protect progress\n"); |
| 3215 | else |
| 3216 | dev_info(&dd->pdev->dev, |
| 3217 | "Write protect progress: %d%% (%d blocks)\n", |
| 3218 | attr242.cur, attr242.data); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3219 | return rv; |
| 3220 | |
| 3221 | out3: |
| 3222 | del_timer_sync(&dd->port->cmd_timer); |
| 3223 | |
| 3224 | /* Disable interrupts on the HBA. */ |
| 3225 | writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN, |
| 3226 | dd->mmio + HOST_CTL); |
| 3227 | |
| 3228 | /*Release the IRQ. */ |
| 3229 | devm_free_irq(&dd->pdev->dev, dd->pdev->irq, dd); |
| 3230 | |
| 3231 | out2: |
| 3232 | mtip_deinit_port(dd->port); |
| 3233 | |
| 3234 | /* Free the command/command header memory. */ |
| 3235 | dmam_free_coherent(&dd->pdev->dev, |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3236 | HW_PORT_PRIV_DMA_SZ + (ATA_SECT_SIZE * 4), |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3237 | dd->port->command_list, |
| 3238 | dd->port->command_list_dma); |
| 3239 | out1: |
| 3240 | /* Free the memory allocated for the for structure. */ |
| 3241 | kfree(dd->port); |
| 3242 | |
| 3243 | return rv; |
| 3244 | } |
| 3245 | |
| 3246 | /* |
| 3247 | * Called to deinitialize an interface. |
| 3248 | * |
| 3249 | * @dd Pointer to the driver data structure. |
| 3250 | * |
| 3251 | * return value |
| 3252 | * 0 |
| 3253 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 3254 | static int mtip_hw_exit(struct driver_data *dd) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3255 | { |
| 3256 | /* |
| 3257 | * Send standby immediate (E0h) to the drive so that it |
| 3258 | * saves its state. |
| 3259 | */ |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3260 | if (!test_bit(MTIP_DDF_CLEANUP_BIT, &dd->dd_flag)) { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3261 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3262 | if (!test_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags)) |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3263 | if (mtip_standby_immediate(dd->port)) |
| 3264 | dev_warn(&dd->pdev->dev, |
| 3265 | "STANDBY IMMEDIATE failed\n"); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3266 | |
| 3267 | /* de-initialize the port. */ |
| 3268 | mtip_deinit_port(dd->port); |
| 3269 | |
| 3270 | /* Disable interrupts on the HBA. */ |
| 3271 | writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN, |
| 3272 | dd->mmio + HOST_CTL); |
| 3273 | } |
| 3274 | |
| 3275 | del_timer_sync(&dd->port->cmd_timer); |
| 3276 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3277 | /* Release the IRQ. */ |
| 3278 | devm_free_irq(&dd->pdev->dev, dd->pdev->irq, dd); |
| 3279 | |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 3280 | /* Stop the bottom half tasklet. */ |
| 3281 | tasklet_kill(&dd->tasklet); |
| 3282 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3283 | /* Free the command/command header memory. */ |
| 3284 | dmam_free_coherent(&dd->pdev->dev, |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3285 | HW_PORT_PRIV_DMA_SZ + (ATA_SECT_SIZE * 4), |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3286 | dd->port->command_list, |
| 3287 | dd->port->command_list_dma); |
| 3288 | /* Free the memory allocated for the for structure. */ |
| 3289 | kfree(dd->port); |
| 3290 | |
| 3291 | return 0; |
| 3292 | } |
| 3293 | |
| 3294 | /* |
| 3295 | * Issue a Standby Immediate command to the device. |
| 3296 | * |
| 3297 | * This function is called by the Block Layer just before the |
| 3298 | * system powers off during a shutdown. |
| 3299 | * |
| 3300 | * @dd Pointer to the driver data structure. |
| 3301 | * |
| 3302 | * return value |
| 3303 | * 0 |
| 3304 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 3305 | static int mtip_hw_shutdown(struct driver_data *dd) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3306 | { |
| 3307 | /* |
| 3308 | * Send standby immediate (E0h) to the drive so that it |
| 3309 | * saves its state. |
| 3310 | */ |
| 3311 | mtip_standby_immediate(dd->port); |
| 3312 | |
| 3313 | return 0; |
| 3314 | } |
| 3315 | |
| 3316 | /* |
| 3317 | * Suspend function |
| 3318 | * |
| 3319 | * This function is called by the Block Layer just before the |
| 3320 | * system hibernates. |
| 3321 | * |
| 3322 | * @dd Pointer to the driver data structure. |
| 3323 | * |
| 3324 | * return value |
| 3325 | * 0 Suspend was successful |
| 3326 | * -EFAULT Suspend was not successful |
| 3327 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 3328 | static int mtip_hw_suspend(struct driver_data *dd) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3329 | { |
| 3330 | /* |
| 3331 | * Send standby immediate (E0h) to the drive |
| 3332 | * so that it saves its state. |
| 3333 | */ |
| 3334 | if (mtip_standby_immediate(dd->port) != 0) { |
| 3335 | dev_err(&dd->pdev->dev, |
| 3336 | "Failed standby-immediate command\n"); |
| 3337 | return -EFAULT; |
| 3338 | } |
| 3339 | |
| 3340 | /* Disable interrupts on the HBA.*/ |
| 3341 | writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN, |
| 3342 | dd->mmio + HOST_CTL); |
| 3343 | mtip_deinit_port(dd->port); |
| 3344 | |
| 3345 | return 0; |
| 3346 | } |
| 3347 | |
| 3348 | /* |
| 3349 | * Resume function |
| 3350 | * |
| 3351 | * This function is called by the Block Layer as the |
| 3352 | * system resumes. |
| 3353 | * |
| 3354 | * @dd Pointer to the driver data structure. |
| 3355 | * |
| 3356 | * return value |
| 3357 | * 0 Resume was successful |
| 3358 | * -EFAULT Resume was not successful |
| 3359 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 3360 | static int mtip_hw_resume(struct driver_data *dd) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3361 | { |
| 3362 | /* Perform any needed hardware setup steps */ |
| 3363 | hba_setup(dd); |
| 3364 | |
| 3365 | /* Reset the HBA */ |
| 3366 | if (mtip_hba_reset(dd) != 0) { |
| 3367 | dev_err(&dd->pdev->dev, |
| 3368 | "Unable to reset the HBA\n"); |
| 3369 | return -EFAULT; |
| 3370 | } |
| 3371 | |
| 3372 | /* |
| 3373 | * Enable the port, DMA engine, and FIS reception specific |
| 3374 | * h/w in controller. |
| 3375 | */ |
| 3376 | mtip_init_port(dd->port); |
| 3377 | mtip_start_port(dd->port); |
| 3378 | |
| 3379 | /* Enable interrupts on the HBA.*/ |
| 3380 | writel(readl(dd->mmio + HOST_CTL) | HOST_IRQ_EN, |
| 3381 | dd->mmio + HOST_CTL); |
| 3382 | |
| 3383 | return 0; |
| 3384 | } |
| 3385 | |
| 3386 | /* |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3387 | * Helper function for reusing disk name |
| 3388 | * upon hot insertion. |
| 3389 | */ |
| 3390 | static int rssd_disk_name_format(char *prefix, |
| 3391 | int index, |
| 3392 | char *buf, |
| 3393 | int buflen) |
| 3394 | { |
| 3395 | const int base = 'z' - 'a' + 1; |
| 3396 | char *begin = buf + strlen(prefix); |
| 3397 | char *end = buf + buflen; |
| 3398 | char *p; |
| 3399 | int unit; |
| 3400 | |
| 3401 | p = end - 1; |
| 3402 | *p = '\0'; |
| 3403 | unit = base; |
| 3404 | do { |
| 3405 | if (p == begin) |
| 3406 | return -EINVAL; |
| 3407 | *--p = 'a' + (index % unit); |
| 3408 | index = (index / unit) - 1; |
| 3409 | } while (index >= 0); |
| 3410 | |
| 3411 | memmove(begin, p, end - p); |
| 3412 | memcpy(buf, prefix, strlen(prefix)); |
| 3413 | |
| 3414 | return 0; |
| 3415 | } |
| 3416 | |
| 3417 | /* |
| 3418 | * Block layer IOCTL handler. |
| 3419 | * |
| 3420 | * @dev Pointer to the block_device structure. |
| 3421 | * @mode ignored |
| 3422 | * @cmd IOCTL command passed from the user application. |
| 3423 | * @arg Argument passed from the user application. |
| 3424 | * |
| 3425 | * return value |
| 3426 | * 0 IOCTL completed successfully. |
| 3427 | * -ENOTTY IOCTL not supported or invalid driver data |
| 3428 | * structure pointer. |
| 3429 | */ |
| 3430 | static int mtip_block_ioctl(struct block_device *dev, |
| 3431 | fmode_t mode, |
| 3432 | unsigned cmd, |
| 3433 | unsigned long arg) |
| 3434 | { |
| 3435 | struct driver_data *dd = dev->bd_disk->private_data; |
| 3436 | |
| 3437 | if (!capable(CAP_SYS_ADMIN)) |
| 3438 | return -EACCES; |
| 3439 | |
| 3440 | if (!dd) |
| 3441 | return -ENOTTY; |
| 3442 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3443 | if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag))) |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3444 | return -ENOTTY; |
| 3445 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3446 | switch (cmd) { |
| 3447 | case BLKFLSBUF: |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 3448 | return -ENOTTY; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3449 | default: |
Jens Axboe | ef0f158 | 2011-09-27 21:19:53 -0600 | [diff] [blame] | 3450 | return mtip_hw_ioctl(dd, cmd, arg); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3451 | } |
| 3452 | } |
| 3453 | |
Jens Axboe | 16d02c0 | 2011-09-27 15:50:01 -0600 | [diff] [blame] | 3454 | #ifdef CONFIG_COMPAT |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3455 | /* |
| 3456 | * Block layer compat IOCTL handler. |
| 3457 | * |
| 3458 | * @dev Pointer to the block_device structure. |
| 3459 | * @mode ignored |
| 3460 | * @cmd IOCTL command passed from the user application. |
| 3461 | * @arg Argument passed from the user application. |
| 3462 | * |
| 3463 | * return value |
| 3464 | * 0 IOCTL completed successfully. |
| 3465 | * -ENOTTY IOCTL not supported or invalid driver data |
| 3466 | * structure pointer. |
| 3467 | */ |
| 3468 | static int mtip_block_compat_ioctl(struct block_device *dev, |
| 3469 | fmode_t mode, |
| 3470 | unsigned cmd, |
| 3471 | unsigned long arg) |
| 3472 | { |
| 3473 | struct driver_data *dd = dev->bd_disk->private_data; |
| 3474 | |
| 3475 | if (!capable(CAP_SYS_ADMIN)) |
| 3476 | return -EACCES; |
| 3477 | |
| 3478 | if (!dd) |
| 3479 | return -ENOTTY; |
| 3480 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3481 | if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag))) |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3482 | return -ENOTTY; |
| 3483 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3484 | switch (cmd) { |
| 3485 | case BLKFLSBUF: |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 3486 | return -ENOTTY; |
Jens Axboe | ef0f158 | 2011-09-27 21:19:53 -0600 | [diff] [blame] | 3487 | case HDIO_DRIVE_TASKFILE: { |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 3488 | struct mtip_compat_ide_task_request_s __user *compat_req_task; |
Jens Axboe | ef0f158 | 2011-09-27 21:19:53 -0600 | [diff] [blame] | 3489 | ide_task_request_t req_task; |
| 3490 | int compat_tasksize, outtotal, ret; |
| 3491 | |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 3492 | compat_tasksize = |
| 3493 | sizeof(struct mtip_compat_ide_task_request_s); |
Jens Axboe | ef0f158 | 2011-09-27 21:19:53 -0600 | [diff] [blame] | 3494 | |
| 3495 | compat_req_task = |
| 3496 | (struct mtip_compat_ide_task_request_s __user *) arg; |
| 3497 | |
| 3498 | if (copy_from_user(&req_task, (void __user *) arg, |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 3499 | compat_tasksize - (2 * sizeof(compat_long_t)))) |
Jens Axboe | ef0f158 | 2011-09-27 21:19:53 -0600 | [diff] [blame] | 3500 | return -EFAULT; |
| 3501 | |
| 3502 | if (get_user(req_task.out_size, &compat_req_task->out_size)) |
| 3503 | return -EFAULT; |
| 3504 | |
| 3505 | if (get_user(req_task.in_size, &compat_req_task->in_size)) |
| 3506 | return -EFAULT; |
| 3507 | |
| 3508 | outtotal = sizeof(struct mtip_compat_ide_task_request_s); |
| 3509 | |
| 3510 | ret = exec_drive_taskfile(dd, (void __user *) arg, |
| 3511 | &req_task, outtotal); |
| 3512 | |
| 3513 | if (copy_to_user((void __user *) arg, &req_task, |
| 3514 | compat_tasksize - |
| 3515 | (2 * sizeof(compat_long_t)))) |
| 3516 | return -EFAULT; |
| 3517 | |
| 3518 | if (put_user(req_task.out_size, &compat_req_task->out_size)) |
| 3519 | return -EFAULT; |
| 3520 | |
| 3521 | if (put_user(req_task.in_size, &compat_req_task->in_size)) |
| 3522 | return -EFAULT; |
| 3523 | |
| 3524 | return ret; |
| 3525 | } |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3526 | default: |
Jens Axboe | ef0f158 | 2011-09-27 21:19:53 -0600 | [diff] [blame] | 3527 | return mtip_hw_ioctl(dd, cmd, arg); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3528 | } |
| 3529 | } |
Jens Axboe | 16d02c0 | 2011-09-27 15:50:01 -0600 | [diff] [blame] | 3530 | #endif |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3531 | |
| 3532 | /* |
| 3533 | * Obtain the geometry of the device. |
| 3534 | * |
| 3535 | * You may think that this function is obsolete, but some applications, |
| 3536 | * fdisk for example still used CHS values. This function describes the |
| 3537 | * device as having 224 heads and 56 sectors per cylinder. These values are |
| 3538 | * chosen so that each cylinder is aligned on a 4KB boundary. Since a |
| 3539 | * partition is described in terms of a start and end cylinder this means |
| 3540 | * that each partition is also 4KB aligned. Non-aligned partitions adversely |
| 3541 | * affects performance. |
| 3542 | * |
| 3543 | * @dev Pointer to the block_device strucutre. |
| 3544 | * @geo Pointer to a hd_geometry structure. |
| 3545 | * |
| 3546 | * return value |
| 3547 | * 0 Operation completed successfully. |
| 3548 | * -ENOTTY An error occurred while reading the drive capacity. |
| 3549 | */ |
| 3550 | static int mtip_block_getgeo(struct block_device *dev, |
| 3551 | struct hd_geometry *geo) |
| 3552 | { |
| 3553 | struct driver_data *dd = dev->bd_disk->private_data; |
| 3554 | sector_t capacity; |
| 3555 | |
| 3556 | if (!dd) |
| 3557 | return -ENOTTY; |
| 3558 | |
| 3559 | if (!(mtip_hw_get_capacity(dd, &capacity))) { |
| 3560 | dev_warn(&dd->pdev->dev, |
| 3561 | "Could not get drive capacity.\n"); |
| 3562 | return -ENOTTY; |
| 3563 | } |
| 3564 | |
| 3565 | geo->heads = 224; |
| 3566 | geo->sectors = 56; |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 3567 | sector_div(capacity, (geo->heads * geo->sectors)); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3568 | geo->cylinders = capacity; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3569 | return 0; |
| 3570 | } |
| 3571 | |
| 3572 | /* |
| 3573 | * Block device operation function. |
| 3574 | * |
| 3575 | * This structure contains pointers to the functions required by the block |
| 3576 | * layer. |
| 3577 | */ |
| 3578 | static const struct block_device_operations mtip_block_ops = { |
| 3579 | .ioctl = mtip_block_ioctl, |
Jens Axboe | 16d02c0 | 2011-09-27 15:50:01 -0600 | [diff] [blame] | 3580 | #ifdef CONFIG_COMPAT |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3581 | .compat_ioctl = mtip_block_compat_ioctl, |
Jens Axboe | 16d02c0 | 2011-09-27 15:50:01 -0600 | [diff] [blame] | 3582 | #endif |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3583 | .getgeo = mtip_block_getgeo, |
| 3584 | .owner = THIS_MODULE |
| 3585 | }; |
| 3586 | |
| 3587 | /* |
| 3588 | * Block layer make request function. |
| 3589 | * |
| 3590 | * This function is called by the kernel to process a BIO for |
| 3591 | * the P320 device. |
| 3592 | * |
| 3593 | * @queue Pointer to the request queue. Unused other than to obtain |
| 3594 | * the driver data structure. |
| 3595 | * @bio Pointer to the BIO. |
| 3596 | * |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3597 | */ |
Jens Axboe | a71f483 | 2011-11-05 08:36:21 +0100 | [diff] [blame] | 3598 | static void mtip_make_request(struct request_queue *queue, struct bio *bio) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3599 | { |
| 3600 | struct driver_data *dd = queue->queuedata; |
| 3601 | struct scatterlist *sg; |
| 3602 | struct bio_vec *bvec; |
| 3603 | int nents = 0; |
| 3604 | int tag = 0; |
| 3605 | |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 3606 | if (unlikely(dd->dd_flag & MTIP_DDF_STOP_IO)) { |
| 3607 | if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, |
| 3608 | &dd->dd_flag))) { |
| 3609 | bio_endio(bio, -ENXIO); |
| 3610 | return; |
| 3611 | } |
| 3612 | if (unlikely(test_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag))) { |
| 3613 | bio_endio(bio, -ENODATA); |
| 3614 | return; |
| 3615 | } |
| 3616 | if (unlikely(test_bit(MTIP_DDF_WRITE_PROTECT_BIT, |
| 3617 | &dd->dd_flag) && |
| 3618 | bio_data_dir(bio))) { |
| 3619 | bio_endio(bio, -ENODATA); |
| 3620 | return; |
| 3621 | } |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3622 | } |
| 3623 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3624 | if (unlikely(!bio_has_data(bio))) { |
| 3625 | blk_queue_flush(queue, 0); |
| 3626 | bio_endio(bio, 0); |
Jens Axboe | a71f483 | 2011-11-05 08:36:21 +0100 | [diff] [blame] | 3627 | return; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3628 | } |
| 3629 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3630 | sg = mtip_hw_get_scatterlist(dd, &tag); |
| 3631 | if (likely(sg != NULL)) { |
| 3632 | blk_queue_bounce(queue, &bio); |
| 3633 | |
| 3634 | if (unlikely((bio)->bi_vcnt > MTIP_MAX_SG)) { |
| 3635 | dev_warn(&dd->pdev->dev, |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3636 | "Maximum number of SGL entries exceeded\n"); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3637 | bio_io_error(bio); |
| 3638 | mtip_hw_release_scatterlist(dd, tag); |
Jens Axboe | a71f483 | 2011-11-05 08:36:21 +0100 | [diff] [blame] | 3639 | return; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3640 | } |
| 3641 | |
| 3642 | /* Create the scatter list for this bio. */ |
| 3643 | bio_for_each_segment(bvec, bio, nents) { |
| 3644 | sg_set_page(&sg[nents], |
| 3645 | bvec->bv_page, |
| 3646 | bvec->bv_len, |
| 3647 | bvec->bv_offset); |
| 3648 | } |
| 3649 | |
| 3650 | /* Issue the read/write. */ |
| 3651 | mtip_hw_submit_io(dd, |
| 3652 | bio->bi_sector, |
| 3653 | bio_sectors(bio), |
| 3654 | nents, |
| 3655 | tag, |
| 3656 | bio_endio, |
| 3657 | bio, |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3658 | bio_data_dir(bio)); |
Jens Axboe | a71f483 | 2011-11-05 08:36:21 +0100 | [diff] [blame] | 3659 | } else |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3660 | bio_io_error(bio); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3661 | } |
| 3662 | |
| 3663 | /* |
| 3664 | * Block layer initialization function. |
| 3665 | * |
| 3666 | * This function is called once by the PCI layer for each P320 |
| 3667 | * device that is connected to the system. |
| 3668 | * |
| 3669 | * @dd Pointer to the driver data structure. |
| 3670 | * |
| 3671 | * return value |
| 3672 | * 0 on success else an error code. |
| 3673 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 3674 | static int mtip_block_initialize(struct driver_data *dd) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3675 | { |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 3676 | int rv = 0, wait_for_rebuild = 0; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3677 | sector_t capacity; |
| 3678 | unsigned int index = 0; |
| 3679 | struct kobject *kobj; |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 3680 | unsigned char thd_name[16]; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3681 | |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 3682 | if (dd->disk) |
| 3683 | goto skip_create_disk; /* hw init done, before rebuild */ |
| 3684 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3685 | /* Initialize the protocol layer. */ |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 3686 | wait_for_rebuild = mtip_hw_init(dd); |
| 3687 | if (wait_for_rebuild < 0) { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3688 | dev_err(&dd->pdev->dev, |
| 3689 | "Protocol layer initialization failed\n"); |
| 3690 | rv = -EINVAL; |
| 3691 | goto protocol_init_error; |
| 3692 | } |
| 3693 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3694 | dd->disk = alloc_disk(MTIP_MAX_MINORS); |
| 3695 | if (dd->disk == NULL) { |
| 3696 | dev_err(&dd->pdev->dev, |
| 3697 | "Unable to allocate gendisk structure\n"); |
| 3698 | rv = -EINVAL; |
| 3699 | goto alloc_disk_error; |
| 3700 | } |
| 3701 | |
| 3702 | /* Generate the disk name, implemented same as in sd.c */ |
| 3703 | do { |
| 3704 | if (!ida_pre_get(&rssd_index_ida, GFP_KERNEL)) |
| 3705 | goto ida_get_error; |
| 3706 | |
| 3707 | spin_lock(&rssd_index_lock); |
| 3708 | rv = ida_get_new(&rssd_index_ida, &index); |
| 3709 | spin_unlock(&rssd_index_lock); |
| 3710 | } while (rv == -EAGAIN); |
| 3711 | |
| 3712 | if (rv) |
| 3713 | goto ida_get_error; |
| 3714 | |
| 3715 | rv = rssd_disk_name_format("rssd", |
| 3716 | index, |
| 3717 | dd->disk->disk_name, |
| 3718 | DISK_NAME_LEN); |
| 3719 | if (rv) |
| 3720 | goto disk_index_error; |
| 3721 | |
| 3722 | dd->disk->driverfs_dev = &dd->pdev->dev; |
| 3723 | dd->disk->major = dd->major; |
| 3724 | dd->disk->first_minor = dd->instance * MTIP_MAX_MINORS; |
| 3725 | dd->disk->fops = &mtip_block_ops; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3726 | dd->disk->private_data = dd; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3727 | dd->index = index; |
| 3728 | |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 3729 | /* |
| 3730 | * if rebuild pending, start the service thread, and delay the block |
| 3731 | * queue creation and add_disk() |
| 3732 | */ |
| 3733 | if (wait_for_rebuild == MTIP_FTL_REBUILD_MAGIC) |
| 3734 | goto start_service_thread; |
| 3735 | |
| 3736 | skip_create_disk: |
| 3737 | /* Allocate the request queue. */ |
| 3738 | dd->queue = blk_alloc_queue(GFP_KERNEL); |
| 3739 | if (dd->queue == NULL) { |
| 3740 | dev_err(&dd->pdev->dev, |
| 3741 | "Unable to allocate request queue\n"); |
| 3742 | rv = -ENOMEM; |
| 3743 | goto block_queue_alloc_init_error; |
| 3744 | } |
| 3745 | |
| 3746 | /* Attach our request function to the request queue. */ |
| 3747 | blk_queue_make_request(dd->queue, mtip_make_request); |
| 3748 | |
| 3749 | dd->disk->queue = dd->queue; |
| 3750 | dd->queue->queuedata = dd; |
| 3751 | |
| 3752 | /* Set device limits. */ |
| 3753 | set_bit(QUEUE_FLAG_NONROT, &dd->queue->queue_flags); |
| 3754 | blk_queue_max_segments(dd->queue, MTIP_MAX_SG); |
| 3755 | blk_queue_physical_block_size(dd->queue, 4096); |
Asai Thambi S P | 6c8ab69 | 2012-05-29 18:42:51 -0700 | [diff] [blame] | 3756 | blk_queue_max_hw_sectors(dd->queue, 0xffff); |
| 3757 | blk_queue_max_segment_size(dd->queue, 0x400000); |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 3758 | blk_queue_io_min(dd->queue, 4096); |
Asai Thambi S P | 6c8ab69 | 2012-05-29 18:42:51 -0700 | [diff] [blame] | 3759 | |
Asai Thambi S P | 4e8670e | 2012-02-07 07:54:31 +0100 | [diff] [blame] | 3760 | /* |
| 3761 | * write back cache is not supported in the device. FUA depends on |
| 3762 | * write back cache support, hence setting flush support to zero. |
| 3763 | */ |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 3764 | blk_queue_flush(dd->queue, 0); |
| 3765 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3766 | /* Set the capacity of the device in 512 byte sectors. */ |
| 3767 | if (!(mtip_hw_get_capacity(dd, &capacity))) { |
| 3768 | dev_warn(&dd->pdev->dev, |
| 3769 | "Could not read drive capacity\n"); |
| 3770 | rv = -EIO; |
| 3771 | goto read_capacity_error; |
| 3772 | } |
| 3773 | set_capacity(dd->disk, capacity); |
| 3774 | |
| 3775 | /* Enable the block device and add it to /dev */ |
| 3776 | add_disk(dd->disk); |
| 3777 | |
| 3778 | /* |
| 3779 | * Now that the disk is active, initialize any sysfs attributes |
| 3780 | * managed by the protocol layer. |
| 3781 | */ |
| 3782 | kobj = kobject_get(&disk_to_dev(dd->disk)->kobj); |
| 3783 | if (kobj) { |
| 3784 | mtip_hw_sysfs_init(dd, kobj); |
| 3785 | kobject_put(kobj); |
| 3786 | } |
Asai Thambi S P | 7b421d2 | 2012-06-04 12:44:02 -0700 | [diff] [blame] | 3787 | mtip_hw_debugfs_init(dd); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3788 | |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3789 | if (dd->mtip_svc_handler) { |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3790 | set_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag); |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 3791 | return rv; /* service thread created for handling rebuild */ |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3792 | } |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 3793 | |
| 3794 | start_service_thread: |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 3795 | sprintf(thd_name, "mtip_svc_thd_%02d", index); |
| 3796 | |
| 3797 | dd->mtip_svc_handler = kthread_run(mtip_service_thread, |
| 3798 | dd, thd_name); |
| 3799 | |
| 3800 | if (IS_ERR(dd->mtip_svc_handler)) { |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 3801 | dev_err(&dd->pdev->dev, "service thread failed to start\n"); |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 3802 | dd->mtip_svc_handler = NULL; |
| 3803 | rv = -EFAULT; |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 3804 | goto kthread_run_error; |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 3805 | } |
| 3806 | |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3807 | if (wait_for_rebuild == MTIP_FTL_REBUILD_MAGIC) |
| 3808 | rv = wait_for_rebuild; |
| 3809 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3810 | return rv; |
| 3811 | |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 3812 | kthread_run_error: |
Asai Thambi S P | 7b421d2 | 2012-06-04 12:44:02 -0700 | [diff] [blame] | 3813 | mtip_hw_debugfs_exit(dd); |
| 3814 | |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 3815 | /* Delete our gendisk. This also removes the device from /dev */ |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3816 | del_gendisk(dd->disk); |
| 3817 | |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 3818 | read_capacity_error: |
| 3819 | blk_cleanup_queue(dd->queue); |
| 3820 | |
| 3821 | block_queue_alloc_init_error: |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3822 | disk_index_error: |
| 3823 | spin_lock(&rssd_index_lock); |
| 3824 | ida_remove(&rssd_index_ida, index); |
| 3825 | spin_unlock(&rssd_index_lock); |
| 3826 | |
| 3827 | ida_get_error: |
| 3828 | put_disk(dd->disk); |
| 3829 | |
| 3830 | alloc_disk_error: |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 3831 | mtip_hw_exit(dd); /* De-initialize the protocol layer. */ |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3832 | |
| 3833 | protocol_init_error: |
| 3834 | return rv; |
| 3835 | } |
| 3836 | |
| 3837 | /* |
| 3838 | * Block layer deinitialization function. |
| 3839 | * |
| 3840 | * Called by the PCI layer as each P320 device is removed. |
| 3841 | * |
| 3842 | * @dd Pointer to the driver data structure. |
| 3843 | * |
| 3844 | * return value |
| 3845 | * 0 |
| 3846 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 3847 | static int mtip_block_remove(struct driver_data *dd) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3848 | { |
| 3849 | struct kobject *kobj; |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 3850 | |
| 3851 | if (dd->mtip_svc_handler) { |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 3852 | set_bit(MTIP_PF_SVC_THD_STOP_BIT, &dd->port->flags); |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 3853 | wake_up_interruptible(&dd->port->svc_wait); |
| 3854 | kthread_stop(dd->mtip_svc_handler); |
| 3855 | } |
| 3856 | |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3857 | /* Clean up the sysfs attributes, if created */ |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3858 | if (test_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag)) { |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3859 | kobj = kobject_get(&disk_to_dev(dd->disk)->kobj); |
| 3860 | if (kobj) { |
| 3861 | mtip_hw_sysfs_exit(dd, kobj); |
| 3862 | kobject_put(kobj); |
| 3863 | } |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3864 | } |
Asai Thambi S P | 7b421d2 | 2012-06-04 12:44:02 -0700 | [diff] [blame] | 3865 | mtip_hw_debugfs_exit(dd); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3866 | |
| 3867 | /* |
| 3868 | * Delete our gendisk structure. This also removes the device |
| 3869 | * from /dev |
| 3870 | */ |
| 3871 | del_gendisk(dd->disk); |
Asai Thambi S P | 8182b49 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3872 | |
| 3873 | spin_lock(&rssd_index_lock); |
| 3874 | ida_remove(&rssd_index_ida, dd->index); |
| 3875 | spin_unlock(&rssd_index_lock); |
| 3876 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3877 | blk_cleanup_queue(dd->queue); |
| 3878 | dd->disk = NULL; |
| 3879 | dd->queue = NULL; |
| 3880 | |
| 3881 | /* De-initialize the protocol layer. */ |
| 3882 | mtip_hw_exit(dd); |
| 3883 | |
| 3884 | return 0; |
| 3885 | } |
| 3886 | |
| 3887 | /* |
| 3888 | * Function called by the PCI layer when just before the |
| 3889 | * machine shuts down. |
| 3890 | * |
| 3891 | * If a protocol layer shutdown function is present it will be called |
| 3892 | * by this function. |
| 3893 | * |
| 3894 | * @dd Pointer to the driver data structure. |
| 3895 | * |
| 3896 | * return value |
| 3897 | * 0 |
| 3898 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 3899 | static int mtip_block_shutdown(struct driver_data *dd) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3900 | { |
| 3901 | dev_info(&dd->pdev->dev, |
| 3902 | "Shutting down %s ...\n", dd->disk->disk_name); |
| 3903 | |
| 3904 | /* Delete our gendisk structure, and cleanup the blk queue. */ |
| 3905 | del_gendisk(dd->disk); |
Asai Thambi S P | 8182b49 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3906 | |
| 3907 | spin_lock(&rssd_index_lock); |
| 3908 | ida_remove(&rssd_index_ida, dd->index); |
| 3909 | spin_unlock(&rssd_index_lock); |
| 3910 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3911 | blk_cleanup_queue(dd->queue); |
| 3912 | dd->disk = NULL; |
| 3913 | dd->queue = NULL; |
| 3914 | |
| 3915 | mtip_hw_shutdown(dd); |
| 3916 | return 0; |
| 3917 | } |
| 3918 | |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 3919 | static int mtip_block_suspend(struct driver_data *dd) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3920 | { |
| 3921 | dev_info(&dd->pdev->dev, |
| 3922 | "Suspending %s ...\n", dd->disk->disk_name); |
| 3923 | mtip_hw_suspend(dd); |
| 3924 | return 0; |
| 3925 | } |
| 3926 | |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 3927 | static int mtip_block_resume(struct driver_data *dd) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3928 | { |
| 3929 | dev_info(&dd->pdev->dev, "Resuming %s ...\n", |
| 3930 | dd->disk->disk_name); |
| 3931 | mtip_hw_resume(dd); |
| 3932 | return 0; |
| 3933 | } |
| 3934 | |
| 3935 | /* |
| 3936 | * Called for each supported PCI device detected. |
| 3937 | * |
| 3938 | * This function allocates the private data structure, enables the |
| 3939 | * PCI device and then calls the block layer initialization function. |
| 3940 | * |
| 3941 | * return value |
| 3942 | * 0 on success else an error code. |
| 3943 | */ |
| 3944 | static int mtip_pci_probe(struct pci_dev *pdev, |
| 3945 | const struct pci_device_id *ent) |
| 3946 | { |
| 3947 | int rv = 0; |
| 3948 | struct driver_data *dd = NULL; |
| 3949 | |
| 3950 | /* Allocate memory for this devices private data. */ |
| 3951 | dd = kzalloc(sizeof(struct driver_data), GFP_KERNEL); |
| 3952 | if (dd == NULL) { |
| 3953 | dev_err(&pdev->dev, |
| 3954 | "Unable to allocate memory for driver data\n"); |
| 3955 | return -ENOMEM; |
| 3956 | } |
| 3957 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3958 | /* Attach the private data to this PCI device. */ |
| 3959 | pci_set_drvdata(pdev, dd); |
| 3960 | |
| 3961 | rv = pcim_enable_device(pdev); |
| 3962 | if (rv < 0) { |
| 3963 | dev_err(&pdev->dev, "Unable to enable device\n"); |
| 3964 | goto iomap_err; |
| 3965 | } |
| 3966 | |
| 3967 | /* Map BAR5 to memory. */ |
| 3968 | rv = pcim_iomap_regions(pdev, 1 << MTIP_ABAR, MTIP_DRV_NAME); |
| 3969 | if (rv < 0) { |
| 3970 | dev_err(&pdev->dev, "Unable to map regions\n"); |
| 3971 | goto iomap_err; |
| 3972 | } |
| 3973 | |
| 3974 | if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) { |
| 3975 | rv = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); |
| 3976 | |
| 3977 | if (rv) { |
| 3978 | rv = pci_set_consistent_dma_mask(pdev, |
| 3979 | DMA_BIT_MASK(32)); |
| 3980 | if (rv) { |
| 3981 | dev_warn(&pdev->dev, |
| 3982 | "64-bit DMA enable failed\n"); |
| 3983 | goto setmask_err; |
| 3984 | } |
| 3985 | } |
| 3986 | } |
| 3987 | |
| 3988 | pci_set_master(pdev); |
| 3989 | |
| 3990 | if (pci_enable_msi(pdev)) { |
| 3991 | dev_warn(&pdev->dev, |
| 3992 | "Unable to enable MSI interrupt.\n"); |
| 3993 | goto block_initialize_err; |
| 3994 | } |
| 3995 | |
| 3996 | /* Copy the info we may need later into the private data structure. */ |
| 3997 | dd->major = mtip_major; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3998 | dd->instance = instance; |
| 3999 | dd->pdev = pdev; |
| 4000 | |
| 4001 | /* Initialize the block layer. */ |
| 4002 | rv = mtip_block_initialize(dd); |
| 4003 | if (rv < 0) { |
| 4004 | dev_err(&pdev->dev, |
| 4005 | "Unable to initialize block layer\n"); |
| 4006 | goto block_initialize_err; |
| 4007 | } |
| 4008 | |
| 4009 | /* |
| 4010 | * Increment the instance count so that each device has a unique |
| 4011 | * instance number. |
| 4012 | */ |
| 4013 | instance++; |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 4014 | if (rv != MTIP_FTL_REBUILD_MAGIC) |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 4015 | set_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 4016 | goto done; |
| 4017 | |
| 4018 | block_initialize_err: |
| 4019 | pci_disable_msi(pdev); |
| 4020 | |
| 4021 | setmask_err: |
| 4022 | pcim_iounmap_regions(pdev, 1 << MTIP_ABAR); |
| 4023 | |
| 4024 | iomap_err: |
| 4025 | kfree(dd); |
| 4026 | pci_set_drvdata(pdev, NULL); |
| 4027 | return rv; |
| 4028 | done: |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 4029 | return rv; |
| 4030 | } |
| 4031 | |
| 4032 | /* |
| 4033 | * Called for each probed device when the device is removed or the |
| 4034 | * driver is unloaded. |
| 4035 | * |
| 4036 | * return value |
| 4037 | * None |
| 4038 | */ |
| 4039 | static void mtip_pci_remove(struct pci_dev *pdev) |
| 4040 | { |
| 4041 | struct driver_data *dd = pci_get_drvdata(pdev); |
| 4042 | int counter = 0; |
| 4043 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 4044 | set_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag); |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 4045 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 4046 | if (mtip_check_surprise_removal(pdev)) { |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 4047 | while (!test_bit(MTIP_DDF_CLEANUP_BIT, &dd->dd_flag)) { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 4048 | counter++; |
| 4049 | msleep(20); |
| 4050 | if (counter == 10) { |
| 4051 | /* Cleanup the outstanding commands */ |
| 4052 | mtip_command_cleanup(dd); |
| 4053 | break; |
| 4054 | } |
| 4055 | } |
| 4056 | } |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 4057 | |
| 4058 | /* Clean up the block layer. */ |
| 4059 | mtip_block_remove(dd); |
| 4060 | |
| 4061 | pci_disable_msi(pdev); |
| 4062 | |
| 4063 | kfree(dd); |
| 4064 | pcim_iounmap_regions(pdev, 1 << MTIP_ABAR); |
| 4065 | } |
| 4066 | |
| 4067 | /* |
| 4068 | * Called for each probed device when the device is suspended. |
| 4069 | * |
| 4070 | * return value |
| 4071 | * 0 Success |
| 4072 | * <0 Error |
| 4073 | */ |
| 4074 | static int mtip_pci_suspend(struct pci_dev *pdev, pm_message_t mesg) |
| 4075 | { |
| 4076 | int rv = 0; |
| 4077 | struct driver_data *dd = pci_get_drvdata(pdev); |
| 4078 | |
| 4079 | if (!dd) { |
| 4080 | dev_err(&pdev->dev, |
| 4081 | "Driver private datastructure is NULL\n"); |
| 4082 | return -EFAULT; |
| 4083 | } |
| 4084 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 4085 | set_bit(MTIP_DDF_RESUME_BIT, &dd->dd_flag); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 4086 | |
| 4087 | /* Disable ports & interrupts then send standby immediate */ |
| 4088 | rv = mtip_block_suspend(dd); |
| 4089 | if (rv < 0) { |
| 4090 | dev_err(&pdev->dev, |
| 4091 | "Failed to suspend controller\n"); |
| 4092 | return rv; |
| 4093 | } |
| 4094 | |
| 4095 | /* |
| 4096 | * Save the pci config space to pdev structure & |
| 4097 | * disable the device |
| 4098 | */ |
| 4099 | pci_save_state(pdev); |
| 4100 | pci_disable_device(pdev); |
| 4101 | |
| 4102 | /* Move to Low power state*/ |
| 4103 | pci_set_power_state(pdev, PCI_D3hot); |
| 4104 | |
| 4105 | return rv; |
| 4106 | } |
| 4107 | |
| 4108 | /* |
| 4109 | * Called for each probed device when the device is resumed. |
| 4110 | * |
| 4111 | * return value |
| 4112 | * 0 Success |
| 4113 | * <0 Error |
| 4114 | */ |
| 4115 | static int mtip_pci_resume(struct pci_dev *pdev) |
| 4116 | { |
| 4117 | int rv = 0; |
| 4118 | struct driver_data *dd; |
| 4119 | |
| 4120 | dd = pci_get_drvdata(pdev); |
| 4121 | if (!dd) { |
| 4122 | dev_err(&pdev->dev, |
| 4123 | "Driver private datastructure is NULL\n"); |
| 4124 | return -EFAULT; |
| 4125 | } |
| 4126 | |
| 4127 | /* Move the device to active State */ |
| 4128 | pci_set_power_state(pdev, PCI_D0); |
| 4129 | |
| 4130 | /* Restore PCI configuration space */ |
| 4131 | pci_restore_state(pdev); |
| 4132 | |
| 4133 | /* Enable the PCI device*/ |
| 4134 | rv = pcim_enable_device(pdev); |
| 4135 | if (rv < 0) { |
| 4136 | dev_err(&pdev->dev, |
| 4137 | "Failed to enable card during resume\n"); |
| 4138 | goto err; |
| 4139 | } |
| 4140 | pci_set_master(pdev); |
| 4141 | |
| 4142 | /* |
| 4143 | * Calls hbaReset, initPort, & startPort function |
| 4144 | * then enables interrupts |
| 4145 | */ |
| 4146 | rv = mtip_block_resume(dd); |
| 4147 | if (rv < 0) |
| 4148 | dev_err(&pdev->dev, "Unable to resume\n"); |
| 4149 | |
| 4150 | err: |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 4151 | clear_bit(MTIP_DDF_RESUME_BIT, &dd->dd_flag); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 4152 | |
| 4153 | return rv; |
| 4154 | } |
| 4155 | |
| 4156 | /* |
| 4157 | * Shutdown routine |
| 4158 | * |
| 4159 | * return value |
| 4160 | * None |
| 4161 | */ |
| 4162 | static void mtip_pci_shutdown(struct pci_dev *pdev) |
| 4163 | { |
| 4164 | struct driver_data *dd = pci_get_drvdata(pdev); |
| 4165 | if (dd) |
| 4166 | mtip_block_shutdown(dd); |
| 4167 | } |
| 4168 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 4169 | /* Table of device ids supported by this driver. */ |
| 4170 | static DEFINE_PCI_DEVICE_TABLE(mtip_pci_tbl) = { |
Asai Thambi S P | 1a13145 | 2012-09-05 22:00:38 +0530 | [diff] [blame^] | 4171 | { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P320H_DEVICE_ID) }, |
| 4172 | { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P320M_DEVICE_ID) }, |
| 4173 | { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P320S_DEVICE_ID) }, |
| 4174 | { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P325M_DEVICE_ID) }, |
| 4175 | { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P420H_DEVICE_ID) }, |
| 4176 | { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P420M_DEVICE_ID) }, |
| 4177 | { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P425M_DEVICE_ID) }, |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 4178 | { 0 } |
| 4179 | }; |
| 4180 | |
| 4181 | /* Structure that describes the PCI driver functions. */ |
Jens Axboe | 3ff147d | 2011-09-27 21:33:53 -0600 | [diff] [blame] | 4182 | static struct pci_driver mtip_pci_driver = { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 4183 | .name = MTIP_DRV_NAME, |
| 4184 | .id_table = mtip_pci_tbl, |
| 4185 | .probe = mtip_pci_probe, |
| 4186 | .remove = mtip_pci_remove, |
| 4187 | .suspend = mtip_pci_suspend, |
| 4188 | .resume = mtip_pci_resume, |
| 4189 | .shutdown = mtip_pci_shutdown, |
| 4190 | }; |
| 4191 | |
| 4192 | MODULE_DEVICE_TABLE(pci, mtip_pci_tbl); |
| 4193 | |
| 4194 | /* |
| 4195 | * Module initialization function. |
| 4196 | * |
| 4197 | * Called once when the module is loaded. This function allocates a major |
| 4198 | * block device number to the Cyclone devices and registers the PCI layer |
| 4199 | * of the driver. |
| 4200 | * |
| 4201 | * Return value |
| 4202 | * 0 on success else error code. |
| 4203 | */ |
| 4204 | static int __init mtip_init(void) |
| 4205 | { |
Ryosuke Saito | 6d27f09 | 2012-04-05 08:09:34 -0600 | [diff] [blame] | 4206 | int error; |
| 4207 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 4208 | printk(KERN_INFO MTIP_DRV_NAME " Version " MTIP_DRV_VERSION "\n"); |
| 4209 | |
| 4210 | /* Allocate a major block device number to use with this driver. */ |
Ryosuke Saito | 6d27f09 | 2012-04-05 08:09:34 -0600 | [diff] [blame] | 4211 | error = register_blkdev(0, MTIP_DRV_NAME); |
| 4212 | if (error <= 0) { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 4213 | printk(KERN_ERR "Unable to register block device (%d)\n", |
Ryosuke Saito | 6d27f09 | 2012-04-05 08:09:34 -0600 | [diff] [blame] | 4214 | error); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 4215 | return -EBUSY; |
| 4216 | } |
Ryosuke Saito | 6d27f09 | 2012-04-05 08:09:34 -0600 | [diff] [blame] | 4217 | mtip_major = error; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 4218 | |
Asai Thambi S P | 7b421d2 | 2012-06-04 12:44:02 -0700 | [diff] [blame] | 4219 | if (!dfs_parent) { |
| 4220 | dfs_parent = debugfs_create_dir("rssd", NULL); |
| 4221 | if (IS_ERR_OR_NULL(dfs_parent)) { |
| 4222 | printk(KERN_WARNING "Error creating debugfs parent\n"); |
| 4223 | dfs_parent = NULL; |
| 4224 | } |
| 4225 | } |
| 4226 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 4227 | /* Register our PCI operations. */ |
Ryosuke Saito | 6d27f09 | 2012-04-05 08:09:34 -0600 | [diff] [blame] | 4228 | error = pci_register_driver(&mtip_pci_driver); |
Asai Thambi S P | 7b421d2 | 2012-06-04 12:44:02 -0700 | [diff] [blame] | 4229 | if (error) { |
| 4230 | debugfs_remove(dfs_parent); |
Ryosuke Saito | 6d27f09 | 2012-04-05 08:09:34 -0600 | [diff] [blame] | 4231 | unregister_blkdev(mtip_major, MTIP_DRV_NAME); |
Asai Thambi S P | 7b421d2 | 2012-06-04 12:44:02 -0700 | [diff] [blame] | 4232 | } |
Ryosuke Saito | 6d27f09 | 2012-04-05 08:09:34 -0600 | [diff] [blame] | 4233 | |
| 4234 | return error; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 4235 | } |
| 4236 | |
| 4237 | /* |
| 4238 | * Module de-initialization function. |
| 4239 | * |
| 4240 | * Called once when the module is unloaded. This function deallocates |
| 4241 | * the major block device number allocated by mtip_init() and |
| 4242 | * unregisters the PCI layer of the driver. |
| 4243 | * |
| 4244 | * Return value |
| 4245 | * none |
| 4246 | */ |
| 4247 | static void __exit mtip_exit(void) |
| 4248 | { |
Asai Thambi S P | 7b421d2 | 2012-06-04 12:44:02 -0700 | [diff] [blame] | 4249 | debugfs_remove_recursive(dfs_parent); |
| 4250 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 4251 | /* Release the allocated major block device number. */ |
| 4252 | unregister_blkdev(mtip_major, MTIP_DRV_NAME); |
| 4253 | |
| 4254 | /* Unregister the PCI driver. */ |
| 4255 | pci_unregister_driver(&mtip_pci_driver); |
| 4256 | } |
| 4257 | |
| 4258 | MODULE_AUTHOR("Micron Technology, Inc"); |
| 4259 | MODULE_DESCRIPTION("Micron RealSSD PCIe Block Driver"); |
| 4260 | MODULE_LICENSE("GPL"); |
| 4261 | MODULE_VERSION(MTIP_DRV_VERSION); |
| 4262 | |
| 4263 | module_init(mtip_init); |
| 4264 | module_exit(mtip_exit); |