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> |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 40 | #include "mtip32xx.h" |
| 41 | |
| 42 | #define HW_CMD_SLOT_SZ (MTIP_MAX_COMMAND_SLOTS * 32) |
| 43 | #define HW_CMD_TBL_SZ (AHCI_CMD_TBL_HDR_SZ + (MTIP_MAX_SG * 16)) |
| 44 | #define HW_CMD_TBL_AR_SZ (HW_CMD_TBL_SZ * MTIP_MAX_COMMAND_SLOTS) |
| 45 | #define HW_PORT_PRIV_DMA_SZ \ |
| 46 | (HW_CMD_SLOT_SZ + HW_CMD_TBL_AR_SZ + AHCI_RX_FIS_SZ) |
| 47 | |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 48 | #define HOST_CAP_NZDMA (1 << 19) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 49 | #define HOST_HSORG 0xFC |
| 50 | #define HSORG_DISABLE_SLOTGRP_INTR (1<<24) |
| 51 | #define HSORG_DISABLE_SLOTGRP_PXIS (1<<16) |
| 52 | #define HSORG_HWREV 0xFF00 |
| 53 | #define HSORG_STYLE 0x8 |
| 54 | #define HSORG_SLOTGROUPS 0x7 |
| 55 | |
| 56 | #define PORT_COMMAND_ISSUE 0x38 |
| 57 | #define PORT_SDBV 0x7C |
| 58 | |
| 59 | #define PORT_OFFSET 0x100 |
| 60 | #define PORT_MEM_SIZE 0x80 |
| 61 | |
| 62 | #define PORT_IRQ_ERR \ |
| 63 | (PORT_IRQ_HBUS_ERR | PORT_IRQ_IF_ERR | PORT_IRQ_CONNECT | \ |
| 64 | PORT_IRQ_PHYRDY | PORT_IRQ_UNK_FIS | PORT_IRQ_BAD_PMP | \ |
| 65 | PORT_IRQ_TF_ERR | PORT_IRQ_HBUS_DATA_ERR | PORT_IRQ_IF_NONFATAL | \ |
| 66 | PORT_IRQ_OVERFLOW) |
| 67 | #define PORT_IRQ_LEGACY \ |
| 68 | (PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS) |
| 69 | #define PORT_IRQ_HANDLED \ |
| 70 | (PORT_IRQ_SDB_FIS | PORT_IRQ_LEGACY | \ |
| 71 | PORT_IRQ_TF_ERR | PORT_IRQ_IF_ERR | \ |
| 72 | PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY) |
| 73 | #define DEF_PORT_IRQ \ |
| 74 | (PORT_IRQ_ERR | PORT_IRQ_LEGACY | PORT_IRQ_SDB_FIS) |
| 75 | |
| 76 | /* product numbers */ |
| 77 | #define MTIP_PRODUCT_UNKNOWN 0x00 |
| 78 | #define MTIP_PRODUCT_ASICFPGA 0x11 |
| 79 | |
| 80 | /* Device instance number, incremented each time a device is probed. */ |
| 81 | static int instance; |
| 82 | |
| 83 | /* |
| 84 | * Global variable used to hold the major block device number |
| 85 | * allocated in mtip_init(). |
| 86 | */ |
Jens Axboe | 3ff147d | 2011-09-27 21:33:53 -0600 | [diff] [blame] | 87 | static int mtip_major; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 88 | |
| 89 | static DEFINE_SPINLOCK(rssd_index_lock); |
| 90 | static DEFINE_IDA(rssd_index_ida); |
| 91 | |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 92 | static int mtip_block_initialize(struct driver_data *dd); |
| 93 | |
Jens Axboe | 16d02c0 | 2011-09-27 15:50:01 -0600 | [diff] [blame] | 94 | #ifdef CONFIG_COMPAT |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 95 | struct mtip_compat_ide_task_request_s { |
| 96 | __u8 io_ports[8]; |
| 97 | __u8 hob_ports[8]; |
| 98 | ide_reg_valid_t out_flags; |
| 99 | ide_reg_valid_t in_flags; |
| 100 | int data_phase; |
| 101 | int req_cmd; |
| 102 | compat_ulong_t out_size; |
| 103 | compat_ulong_t in_size; |
| 104 | }; |
Jens Axboe | 16d02c0 | 2011-09-27 15:50:01 -0600 | [diff] [blame] | 105 | #endif |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 106 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 107 | /* |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 108 | * This function check_for_surprise_removal is called |
| 109 | * while card is removed from the system and it will |
| 110 | * read the vendor id from the configration space |
| 111 | * |
| 112 | * @pdev Pointer to the pci_dev structure. |
| 113 | * |
| 114 | * return value |
| 115 | * true if device removed, else false |
| 116 | */ |
| 117 | static bool mtip_check_surprise_removal(struct pci_dev *pdev) |
| 118 | { |
| 119 | u16 vendor_id = 0; |
| 120 | |
| 121 | /* Read the vendorID from the configuration space */ |
| 122 | pci_read_config_word(pdev, 0x00, &vendor_id); |
| 123 | if (vendor_id == 0xFFFF) |
| 124 | return true; /* device removed */ |
| 125 | |
| 126 | return false; /* device present */ |
| 127 | } |
| 128 | |
| 129 | /* |
| 130 | * This function is called for clean the pending command in the |
| 131 | * command slot during the surprise removal of device and return |
| 132 | * error to the upper layer. |
| 133 | * |
| 134 | * @dd Pointer to the DRIVER_DATA structure. |
| 135 | * |
| 136 | * return value |
| 137 | * None |
| 138 | */ |
| 139 | static void mtip_command_cleanup(struct driver_data *dd) |
| 140 | { |
| 141 | int group = 0, commandslot = 0, commandindex = 0; |
| 142 | struct mtip_cmd *command; |
| 143 | struct mtip_port *port = dd->port; |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 144 | static int in_progress; |
| 145 | |
| 146 | if (in_progress) |
| 147 | return; |
| 148 | |
| 149 | in_progress = 1; |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 150 | |
| 151 | for (group = 0; group < 4; group++) { |
| 152 | for (commandslot = 0; commandslot < 32; commandslot++) { |
| 153 | if (!(port->allocated[group] & (1 << commandslot))) |
| 154 | continue; |
| 155 | |
| 156 | commandindex = group << 5 | commandslot; |
| 157 | command = &port->commands[commandindex]; |
| 158 | |
| 159 | if (atomic_read(&command->active) |
| 160 | && (command->async_callback)) { |
| 161 | command->async_callback(command->async_data, |
| 162 | -ENODEV); |
| 163 | command->async_callback = NULL; |
| 164 | command->async_data = NULL; |
| 165 | } |
| 166 | |
| 167 | dma_unmap_sg(&port->dd->pdev->dev, |
| 168 | command->sg, |
| 169 | command->scatter_ents, |
| 170 | command->direction); |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | up(&port->cmd_slot); |
| 175 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 176 | set_bit(MTIP_DDF_CLEANUP_BIT, &dd->dd_flag); |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 177 | in_progress = 0; |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 178 | } |
| 179 | |
| 180 | /* |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 181 | * Obtain an empty command slot. |
| 182 | * |
| 183 | * This function needs to be reentrant since it could be called |
| 184 | * at the same time on multiple CPUs. The allocation of the |
| 185 | * command slot must be atomic. |
| 186 | * |
| 187 | * @port Pointer to the port data structure. |
| 188 | * |
| 189 | * return value |
| 190 | * >= 0 Index of command slot obtained. |
| 191 | * -1 No command slots available. |
| 192 | */ |
| 193 | static int get_slot(struct mtip_port *port) |
| 194 | { |
| 195 | int slot, i; |
| 196 | unsigned int num_command_slots = port->dd->slot_groups * 32; |
| 197 | |
| 198 | /* |
| 199 | * Try 10 times, because there is a small race here. |
| 200 | * that's ok, because it's still cheaper than a lock. |
| 201 | * |
| 202 | * Race: Since this section is not protected by lock, same bit |
| 203 | * could be chosen by different process contexts running in |
| 204 | * different processor. So instead of costly lock, we are going |
| 205 | * with loop. |
| 206 | */ |
| 207 | for (i = 0; i < 10; i++) { |
| 208 | slot = find_next_zero_bit(port->allocated, |
| 209 | num_command_slots, 1); |
| 210 | if ((slot < num_command_slots) && |
| 211 | (!test_and_set_bit(slot, port->allocated))) |
| 212 | return slot; |
| 213 | } |
| 214 | dev_warn(&port->dd->pdev->dev, "Failed to get a tag.\n"); |
| 215 | |
| 216 | if (mtip_check_surprise_removal(port->dd->pdev)) { |
| 217 | /* Device not present, clean outstanding commands */ |
| 218 | mtip_command_cleanup(port->dd); |
| 219 | } |
| 220 | return -1; |
| 221 | } |
| 222 | |
| 223 | /* |
| 224 | * Release a command slot. |
| 225 | * |
| 226 | * @port Pointer to the port data structure. |
| 227 | * @tag Tag of command to release |
| 228 | * |
| 229 | * return value |
| 230 | * None |
| 231 | */ |
| 232 | static inline void release_slot(struct mtip_port *port, int tag) |
| 233 | { |
| 234 | smp_mb__before_clear_bit(); |
| 235 | clear_bit(tag, port->allocated); |
| 236 | smp_mb__after_clear_bit(); |
| 237 | } |
| 238 | |
| 239 | /* |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 240 | * Reset the HBA (without sleeping) |
| 241 | * |
| 242 | * Just like hba_reset, except does not call sleep, so can be |
| 243 | * run from interrupt/tasklet context. |
| 244 | * |
| 245 | * @dd Pointer to the driver data structure. |
| 246 | * |
| 247 | * return value |
| 248 | * 0 The reset was successful. |
| 249 | * -1 The HBA Reset bit did not clear. |
| 250 | */ |
| 251 | static int hba_reset_nosleep(struct driver_data *dd) |
| 252 | { |
| 253 | unsigned long timeout; |
| 254 | |
| 255 | /* Chip quirk: quiesce any chip function */ |
| 256 | mdelay(10); |
| 257 | |
| 258 | /* Set the reset bit */ |
| 259 | writel(HOST_RESET, dd->mmio + HOST_CTL); |
| 260 | |
| 261 | /* Flush */ |
| 262 | readl(dd->mmio + HOST_CTL); |
| 263 | |
| 264 | /* |
| 265 | * Wait 10ms then spin for up to 1 second |
| 266 | * waiting for reset acknowledgement |
| 267 | */ |
| 268 | timeout = jiffies + msecs_to_jiffies(1000); |
| 269 | mdelay(10); |
| 270 | while ((readl(dd->mmio + HOST_CTL) & HOST_RESET) |
| 271 | && time_before(jiffies, timeout)) |
| 272 | mdelay(1); |
| 273 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 274 | 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] | 275 | return -1; |
| 276 | |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 277 | if (readl(dd->mmio + HOST_CTL) & HOST_RESET) |
| 278 | return -1; |
| 279 | |
| 280 | return 0; |
| 281 | } |
| 282 | |
| 283 | /* |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 284 | * Issue a command to the hardware. |
| 285 | * |
| 286 | * Set the appropriate bit in the s_active and Command Issue hardware |
| 287 | * registers, causing hardware command processing to begin. |
| 288 | * |
| 289 | * @port Pointer to the port structure. |
| 290 | * @tag The tag of the command to be issued. |
| 291 | * |
| 292 | * return value |
| 293 | * None |
| 294 | */ |
| 295 | static inline void mtip_issue_ncq_command(struct mtip_port *port, int tag) |
| 296 | { |
| 297 | unsigned long flags = 0; |
| 298 | |
| 299 | atomic_set(&port->commands[tag].active, 1); |
| 300 | |
| 301 | spin_lock_irqsave(&port->cmd_issue_lock, flags); |
| 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 | |
| 308 | spin_unlock_irqrestore(&port->cmd_issue_lock, flags); |
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); |
| 784 | |
Asai Thambi S P | 95fea2f | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 785 | /* clear the tag accumulator */ |
| 786 | memset(tagaccum, 0, SLOTBITS_IN_LONGS * sizeof(long)); |
| 787 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 788 | /* Set eh_active */ |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 789 | set_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 790 | |
| 791 | /* Loop through all the groups */ |
| 792 | for (group = 0; group < dd->slot_groups; group++) { |
| 793 | completed = readl(port->completed[group]); |
| 794 | |
| 795 | /* clear completed status register in the hardware.*/ |
| 796 | writel(completed, port->completed[group]); |
| 797 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 798 | /* Process successfully completed commands */ |
| 799 | for (bit = 0; bit < 32 && completed; bit++) { |
| 800 | if (!(completed & (1<<bit))) |
| 801 | continue; |
| 802 | tag = (group << 5) + bit; |
| 803 | |
| 804 | /* Skip the internal command slot */ |
| 805 | if (tag == MTIP_TAG_INTERNAL) |
| 806 | continue; |
| 807 | |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 808 | cmd = &port->commands[tag]; |
| 809 | if (likely(cmd->comp_func)) { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 810 | set_bit(tag, tagaccum); |
Asai Thambi S P | 95fea2f | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 811 | cmd_cnt++; |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 812 | atomic_set(&cmd->active, 0); |
| 813 | cmd->comp_func(port, |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 814 | tag, |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 815 | cmd->comp_data, |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 816 | 0); |
| 817 | } else { |
| 818 | dev_err(&port->dd->pdev->dev, |
| 819 | "Missing completion func for tag %d", |
| 820 | tag); |
| 821 | if (mtip_check_surprise_removal(dd->pdev)) { |
| 822 | mtip_command_cleanup(dd); |
| 823 | /* don't proceed further */ |
| 824 | return; |
| 825 | } |
| 826 | } |
| 827 | } |
| 828 | } |
Asai Thambi S P | 95fea2f | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 829 | |
| 830 | print_tags(dd, "completed (TFE)", tagaccum, cmd_cnt); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 831 | |
| 832 | /* Restart the port */ |
| 833 | mdelay(20); |
| 834 | mtip_restart_port(port); |
| 835 | |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 836 | /* Trying to determine the cause of the error */ |
| 837 | rv = mtip_read_log_page(dd->port, ATA_LOG_SATA_NCQ, |
| 838 | dd->port->log_buf, |
| 839 | dd->port->log_buf_dma, 1); |
| 840 | if (rv) { |
| 841 | dev_warn(&dd->pdev->dev, |
| 842 | "Error in READ LOG EXT (10h) command\n"); |
| 843 | /* non-critical error, don't fail the load */ |
| 844 | } else { |
| 845 | buf = (unsigned char *)dd->port->log_buf; |
| 846 | if (buf[259] & 0x1) { |
| 847 | dev_info(&dd->pdev->dev, |
| 848 | "Write protect bit is set.\n"); |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 849 | set_bit(MTIP_DDF_WRITE_PROTECT_BIT, &dd->dd_flag); |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 850 | fail_all_ncq_write = 1; |
| 851 | fail_reason = "write protect"; |
| 852 | } |
| 853 | if (buf[288] == 0xF7) { |
| 854 | dev_info(&dd->pdev->dev, |
| 855 | "Exceeded Tmax, drive in thermal shutdown.\n"); |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 856 | set_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag); |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 857 | fail_all_ncq_cmds = 1; |
| 858 | fail_reason = "thermal shutdown"; |
| 859 | } |
| 860 | if (buf[288] == 0xBF) { |
| 861 | dev_info(&dd->pdev->dev, |
| 862 | "Drive indicates rebuild has failed.\n"); |
| 863 | fail_all_ncq_cmds = 1; |
| 864 | fail_reason = "rebuild failed"; |
| 865 | } |
| 866 | } |
| 867 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 868 | /* clear the tag accumulator */ |
| 869 | memset(tagaccum, 0, SLOTBITS_IN_LONGS * sizeof(long)); |
| 870 | |
| 871 | /* Loop through all the groups */ |
| 872 | for (group = 0; group < dd->slot_groups; group++) { |
| 873 | for (bit = 0; bit < 32; bit++) { |
| 874 | reissue = 1; |
| 875 | tag = (group << 5) + bit; |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 876 | cmd = &port->commands[tag]; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 877 | |
| 878 | /* If the active bit is set re-issue the command */ |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 879 | if (atomic_read(&cmd->active) == 0) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 880 | continue; |
| 881 | |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 882 | fis = (struct host_to_dev_fis *)cmd->command; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 883 | |
| 884 | /* Should re-issue? */ |
| 885 | if (tag == MTIP_TAG_INTERNAL || |
| 886 | fis->command == ATA_CMD_SET_FEATURES) |
| 887 | reissue = 0; |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 888 | else { |
| 889 | if (fail_all_ncq_cmds || |
| 890 | (fail_all_ncq_write && |
| 891 | fis->command == ATA_CMD_FPDMA_WRITE)) { |
| 892 | dev_warn(&dd->pdev->dev, |
| 893 | " Fail: %s w/tag %d [%s].\n", |
| 894 | fis->command == ATA_CMD_FPDMA_WRITE ? |
| 895 | "write" : "read", |
| 896 | tag, |
| 897 | fail_reason != NULL ? |
| 898 | fail_reason : "unknown"); |
| 899 | atomic_set(&cmd->active, 0); |
| 900 | if (cmd->comp_func) { |
| 901 | cmd->comp_func(port, tag, |
| 902 | cmd->comp_data, |
| 903 | -ENODATA); |
| 904 | } |
| 905 | continue; |
| 906 | } |
| 907 | } |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 908 | |
| 909 | /* |
| 910 | * First check if this command has |
| 911 | * exceeded its retries. |
| 912 | */ |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 913 | if (reissue && (cmd->retries-- > 0)) { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 914 | |
| 915 | set_bit(tag, tagaccum); |
| 916 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 917 | /* Re-issue the command. */ |
| 918 | mtip_issue_ncq_command(port, tag); |
| 919 | |
| 920 | continue; |
| 921 | } |
| 922 | |
| 923 | /* Retire a command that will not be reissued */ |
| 924 | dev_warn(&port->dd->pdev->dev, |
| 925 | "retiring tag %d\n", tag); |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 926 | atomic_set(&cmd->active, 0); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 927 | |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 928 | if (cmd->comp_func) |
| 929 | cmd->comp_func( |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 930 | port, |
| 931 | tag, |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 932 | cmd->comp_data, |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 933 | PORT_IRQ_TF_ERR); |
| 934 | else |
| 935 | dev_warn(&port->dd->pdev->dev, |
| 936 | "Bad completion for tag %d\n", |
| 937 | tag); |
| 938 | } |
| 939 | } |
Asai Thambi S P | 95fea2f | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 940 | print_tags(dd, "reissued (TFE)", tagaccum, cmd_cnt); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 941 | |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 942 | /* clear eh_active */ |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 943 | clear_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags); |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 944 | wake_up_interruptible(&port->svc_wait); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 945 | |
| 946 | mod_timer(&port->cmd_timer, |
| 947 | jiffies + msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD)); |
| 948 | } |
| 949 | |
| 950 | /* |
| 951 | * Handle a set device bits interrupt |
| 952 | */ |
| 953 | static inline void mtip_process_sdbf(struct driver_data *dd) |
| 954 | { |
| 955 | struct mtip_port *port = dd->port; |
| 956 | int group, tag, bit; |
| 957 | u32 completed; |
| 958 | struct mtip_cmd *command; |
| 959 | |
| 960 | /* walk all bits in all slot groups */ |
| 961 | for (group = 0; group < dd->slot_groups; group++) { |
| 962 | completed = readl(port->completed[group]); |
| 963 | |
| 964 | /* clear completed status register in the hardware.*/ |
| 965 | writel(completed, port->completed[group]); |
| 966 | |
| 967 | /* Process completed commands. */ |
| 968 | for (bit = 0; |
| 969 | (bit < 32) && completed; |
| 970 | bit++, completed >>= 1) { |
| 971 | if (completed & 0x01) { |
| 972 | tag = (group << 5) | bit; |
| 973 | |
| 974 | /* skip internal command slot. */ |
| 975 | if (unlikely(tag == MTIP_TAG_INTERNAL)) |
| 976 | continue; |
| 977 | |
| 978 | command = &port->commands[tag]; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 979 | /* make internal callback */ |
| 980 | if (likely(command->comp_func)) { |
| 981 | command->comp_func( |
| 982 | port, |
| 983 | tag, |
| 984 | command->comp_data, |
| 985 | 0); |
| 986 | } else { |
| 987 | dev_warn(&dd->pdev->dev, |
| 988 | "Null completion " |
| 989 | "for tag %d", |
| 990 | tag); |
| 991 | |
| 992 | if (mtip_check_surprise_removal( |
| 993 | dd->pdev)) { |
| 994 | mtip_command_cleanup(dd); |
| 995 | return; |
| 996 | } |
| 997 | } |
| 998 | } |
| 999 | } |
| 1000 | } |
| 1001 | } |
| 1002 | |
| 1003 | /* |
| 1004 | * Process legacy pio and d2h interrupts |
| 1005 | */ |
| 1006 | static inline void mtip_process_legacy(struct driver_data *dd, u32 port_stat) |
| 1007 | { |
| 1008 | struct mtip_port *port = dd->port; |
| 1009 | struct mtip_cmd *cmd = &port->commands[MTIP_TAG_INTERNAL]; |
| 1010 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1011 | if (test_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags) && |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1012 | (cmd != NULL) && !(readl(port->cmd_issue[MTIP_TAG_INTERNAL]) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1013 | & (1 << MTIP_TAG_INTERNAL))) { |
| 1014 | if (cmd->comp_func) { |
| 1015 | cmd->comp_func(port, |
| 1016 | MTIP_TAG_INTERNAL, |
| 1017 | cmd->comp_data, |
| 1018 | 0); |
| 1019 | return; |
| 1020 | } |
| 1021 | } |
| 1022 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1023 | return; |
| 1024 | } |
| 1025 | |
| 1026 | /* |
| 1027 | * Demux and handle errors |
| 1028 | */ |
| 1029 | static inline void mtip_process_errors(struct driver_data *dd, u32 port_stat) |
| 1030 | { |
| 1031 | if (likely(port_stat & (PORT_IRQ_TF_ERR | PORT_IRQ_IF_ERR))) |
| 1032 | mtip_handle_tfe(dd); |
| 1033 | |
| 1034 | if (unlikely(port_stat & PORT_IRQ_CONNECT)) { |
| 1035 | dev_warn(&dd->pdev->dev, |
| 1036 | "Clearing PxSERR.DIAG.x\n"); |
| 1037 | writel((1 << 26), dd->port->mmio + PORT_SCR_ERR); |
| 1038 | } |
| 1039 | |
| 1040 | if (unlikely(port_stat & PORT_IRQ_PHYRDY)) { |
| 1041 | dev_warn(&dd->pdev->dev, |
| 1042 | "Clearing PxSERR.DIAG.n\n"); |
| 1043 | writel((1 << 16), dd->port->mmio + PORT_SCR_ERR); |
| 1044 | } |
| 1045 | |
| 1046 | if (unlikely(port_stat & ~PORT_IRQ_HANDLED)) { |
| 1047 | dev_warn(&dd->pdev->dev, |
| 1048 | "Port stat errors %x unhandled\n", |
| 1049 | (port_stat & ~PORT_IRQ_HANDLED)); |
| 1050 | } |
| 1051 | } |
| 1052 | |
| 1053 | static inline irqreturn_t mtip_handle_irq(struct driver_data *data) |
| 1054 | { |
| 1055 | struct driver_data *dd = (struct driver_data *) data; |
| 1056 | struct mtip_port *port = dd->port; |
| 1057 | u32 hba_stat, port_stat; |
| 1058 | int rv = IRQ_NONE; |
| 1059 | |
| 1060 | hba_stat = readl(dd->mmio + HOST_IRQ_STAT); |
| 1061 | if (hba_stat) { |
| 1062 | rv = IRQ_HANDLED; |
| 1063 | |
| 1064 | /* Acknowledge the interrupt status on the port.*/ |
| 1065 | port_stat = readl(port->mmio + PORT_IRQ_STAT); |
| 1066 | writel(port_stat, port->mmio + PORT_IRQ_STAT); |
| 1067 | |
| 1068 | /* Demux port status */ |
| 1069 | if (likely(port_stat & PORT_IRQ_SDB_FIS)) |
| 1070 | mtip_process_sdbf(dd); |
| 1071 | |
| 1072 | if (unlikely(port_stat & PORT_IRQ_ERR)) { |
| 1073 | if (unlikely(mtip_check_surprise_removal(dd->pdev))) { |
| 1074 | mtip_command_cleanup(dd); |
| 1075 | /* don't proceed further */ |
| 1076 | return IRQ_HANDLED; |
| 1077 | } |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1078 | if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1079 | &dd->dd_flag)) |
| 1080 | return rv; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1081 | |
| 1082 | mtip_process_errors(dd, port_stat & PORT_IRQ_ERR); |
| 1083 | } |
| 1084 | |
| 1085 | if (unlikely(port_stat & PORT_IRQ_LEGACY)) |
| 1086 | mtip_process_legacy(dd, port_stat & PORT_IRQ_LEGACY); |
| 1087 | } |
| 1088 | |
| 1089 | /* acknowledge interrupt */ |
| 1090 | writel(hba_stat, dd->mmio + HOST_IRQ_STAT); |
| 1091 | |
| 1092 | return rv; |
| 1093 | } |
| 1094 | |
| 1095 | /* |
| 1096 | * Wrapper for mtip_handle_irq |
| 1097 | * (ignores return code) |
| 1098 | */ |
| 1099 | static void mtip_tasklet(unsigned long data) |
| 1100 | { |
| 1101 | mtip_handle_irq((struct driver_data *) data); |
| 1102 | } |
| 1103 | |
| 1104 | /* |
| 1105 | * HBA interrupt subroutine. |
| 1106 | * |
| 1107 | * @irq IRQ number. |
| 1108 | * @instance Pointer to the driver data structure. |
| 1109 | * |
| 1110 | * return value |
| 1111 | * IRQ_HANDLED A HBA interrupt was pending and handled. |
| 1112 | * IRQ_NONE This interrupt was not for the HBA. |
| 1113 | */ |
| 1114 | static irqreturn_t mtip_irq_handler(int irq, void *instance) |
| 1115 | { |
| 1116 | struct driver_data *dd = instance; |
| 1117 | tasklet_schedule(&dd->tasklet); |
| 1118 | return IRQ_HANDLED; |
| 1119 | } |
| 1120 | |
| 1121 | static void mtip_issue_non_ncq_command(struct mtip_port *port, int tag) |
| 1122 | { |
| 1123 | atomic_set(&port->commands[tag].active, 1); |
| 1124 | writel(1 << MTIP_TAG_BIT(tag), |
| 1125 | port->cmd_issue[MTIP_TAG_INDEX(tag)]); |
| 1126 | } |
| 1127 | |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 1128 | static bool mtip_pause_ncq(struct mtip_port *port, |
| 1129 | struct host_to_dev_fis *fis) |
| 1130 | { |
| 1131 | struct host_to_dev_fis *reply; |
| 1132 | unsigned long task_file_data; |
| 1133 | |
| 1134 | reply = port->rxfis + RX_FIS_D2H_REG; |
| 1135 | task_file_data = readl(port->mmio+PORT_TFDATA); |
| 1136 | |
| 1137 | if ((task_file_data & 1) || (fis->command == ATA_CMD_SEC_ERASE_UNIT)) |
| 1138 | return false; |
| 1139 | |
| 1140 | if (fis->command == ATA_CMD_SEC_ERASE_PREP) { |
| 1141 | set_bit(MTIP_PF_SE_ACTIVE_BIT, &port->flags); |
| 1142 | port->ic_pause_timer = jiffies; |
| 1143 | return true; |
| 1144 | } else if ((fis->command == ATA_CMD_DOWNLOAD_MICRO) && |
| 1145 | (fis->features == 0x03)) { |
| 1146 | set_bit(MTIP_PF_DM_ACTIVE_BIT, &port->flags); |
| 1147 | port->ic_pause_timer = jiffies; |
| 1148 | return true; |
| 1149 | } else if ((fis->command == ATA_CMD_SEC_ERASE_UNIT) || |
| 1150 | ((fis->command == 0xFC) && |
| 1151 | (fis->features == 0x27 || fis->features == 0x72 || |
| 1152 | fis->features == 0x62 || fis->features == 0x26))) { |
| 1153 | /* Com reset after secure erase or lowlevel format */ |
| 1154 | mtip_restart_port(port); |
| 1155 | return false; |
| 1156 | } |
| 1157 | |
| 1158 | return false; |
| 1159 | } |
| 1160 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1161 | /* |
| 1162 | * Wait for port to quiesce |
| 1163 | * |
| 1164 | * @port Pointer to port data structure |
| 1165 | * @timeout Max duration to wait (ms) |
| 1166 | * |
| 1167 | * return value |
| 1168 | * 0 Success |
| 1169 | * -EBUSY Commands still active |
| 1170 | */ |
| 1171 | static int mtip_quiesce_io(struct mtip_port *port, unsigned long timeout) |
| 1172 | { |
| 1173 | unsigned long to; |
Dan Carpenter | 3e54a3d | 2011-11-24 12:59:00 +0100 | [diff] [blame] | 1174 | unsigned int n; |
| 1175 | unsigned int active = 1; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1176 | |
| 1177 | to = jiffies + msecs_to_jiffies(timeout); |
| 1178 | do { |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1179 | if (test_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags) && |
| 1180 | test_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags)) { |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1181 | msleep(20); |
| 1182 | continue; /* svc thd is actively issuing commands */ |
| 1183 | } |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1184 | 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] | 1185 | return -EFAULT; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1186 | /* |
| 1187 | * Ignore s_active bit 0 of array element 0. |
| 1188 | * This bit will always be set |
| 1189 | */ |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1190 | active = readl(port->s_active[0]) & 0xFFFFFFFE; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1191 | for (n = 1; n < port->dd->slot_groups; n++) |
| 1192 | active |= readl(port->s_active[n]); |
| 1193 | |
| 1194 | if (!active) |
| 1195 | break; |
| 1196 | |
| 1197 | msleep(20); |
| 1198 | } while (time_before(jiffies, to)); |
| 1199 | |
| 1200 | return active ? -EBUSY : 0; |
| 1201 | } |
| 1202 | |
| 1203 | /* |
| 1204 | * Execute an internal command and wait for the completion. |
| 1205 | * |
| 1206 | * @port Pointer to the port data structure. |
| 1207 | * @fis Pointer to the FIS that describes the command. |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1208 | * @fis_len Length in WORDS of the FIS. |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1209 | * @buffer DMA accessible for command data. |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1210 | * @buf_len Length, in bytes, of the data buffer. |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1211 | * @opts Command header options, excluding the FIS length |
| 1212 | * and the number of PRD entries. |
| 1213 | * @timeout Time in ms to wait for the command to complete. |
| 1214 | * |
| 1215 | * return value |
| 1216 | * 0 Command completed successfully. |
| 1217 | * -EFAULT The buffer address is not correctly aligned. |
| 1218 | * -EBUSY Internal command or other IO in progress. |
| 1219 | * -EAGAIN Time out waiting for command to complete. |
| 1220 | */ |
| 1221 | static int mtip_exec_internal_command(struct mtip_port *port, |
Asai Thambi S P | 8182b49 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1222 | struct host_to_dev_fis *fis, |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1223 | int fis_len, |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1224 | dma_addr_t buffer, |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1225 | int buf_len, |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1226 | u32 opts, |
| 1227 | gfp_t atomic, |
| 1228 | unsigned long timeout) |
| 1229 | { |
| 1230 | struct mtip_cmd_sg *command_sg; |
| 1231 | DECLARE_COMPLETION_ONSTACK(wait); |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 1232 | int rv = 0, ready2go = 1; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1233 | struct mtip_cmd *int_cmd = &port->commands[MTIP_TAG_INTERNAL]; |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 1234 | unsigned long to; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1235 | |
| 1236 | /* Make sure the buffer is 8 byte aligned. This is asic specific. */ |
| 1237 | if (buffer & 0x00000007) { |
| 1238 | dev_err(&port->dd->pdev->dev, |
| 1239 | "SG buffer is not 8 byte aligned\n"); |
| 1240 | return -EFAULT; |
| 1241 | } |
| 1242 | |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 1243 | to = jiffies + msecs_to_jiffies(timeout); |
| 1244 | do { |
| 1245 | ready2go = !test_and_set_bit(MTIP_TAG_INTERNAL, |
| 1246 | port->allocated); |
| 1247 | if (ready2go) |
| 1248 | break; |
| 1249 | mdelay(100); |
| 1250 | } while (time_before(jiffies, to)); |
| 1251 | if (!ready2go) { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1252 | dev_warn(&port->dd->pdev->dev, |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 1253 | "Internal cmd active. new cmd [%02X]\n", fis->command); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1254 | return -EBUSY; |
| 1255 | } |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1256 | set_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags); |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 1257 | port->ic_pause_timer = 0; |
| 1258 | |
| 1259 | if (fis->command == ATA_CMD_SEC_ERASE_UNIT) |
| 1260 | clear_bit(MTIP_PF_SE_ACTIVE_BIT, &port->flags); |
| 1261 | else if (fis->command == ATA_CMD_DOWNLOAD_MICRO) |
| 1262 | clear_bit(MTIP_PF_DM_ACTIVE_BIT, &port->flags); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1263 | |
| 1264 | if (atomic == GFP_KERNEL) { |
Asai Thambi S P | 8182b49 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1265 | if (fis->command != ATA_CMD_STANDBYNOW1) { |
| 1266 | /* wait for io to complete if non atomic */ |
| 1267 | if (mtip_quiesce_io(port, 5000) < 0) { |
| 1268 | dev_warn(&port->dd->pdev->dev, |
| 1269 | "Failed to quiesce IO\n"); |
| 1270 | release_slot(port, MTIP_TAG_INTERNAL); |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1271 | clear_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags); |
Asai Thambi S P | 8182b49 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1272 | wake_up_interruptible(&port->svc_wait); |
| 1273 | return -EBUSY; |
| 1274 | } |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1275 | } |
| 1276 | |
| 1277 | /* Set the completion function and data for the command. */ |
| 1278 | int_cmd->comp_data = &wait; |
| 1279 | int_cmd->comp_func = mtip_completion; |
| 1280 | |
| 1281 | } else { |
| 1282 | /* Clear completion - we're going to poll */ |
| 1283 | int_cmd->comp_data = NULL; |
Asai Thambi S P | 8182b49 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1284 | int_cmd->comp_func = mtip_null_completion; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1285 | } |
| 1286 | |
| 1287 | /* Copy the command to the command table */ |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1288 | memcpy(int_cmd->command, fis, fis_len*4); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1289 | |
| 1290 | /* Populate the SG list */ |
| 1291 | int_cmd->command_header->opts = |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1292 | __force_bit2int cpu_to_le32(opts | fis_len); |
| 1293 | if (buf_len) { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1294 | command_sg = int_cmd->command + AHCI_CMD_TBL_HDR_SZ; |
| 1295 | |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1296 | command_sg->info = |
| 1297 | __force_bit2int cpu_to_le32((buf_len-1) & 0x3FFFFF); |
| 1298 | command_sg->dba = |
| 1299 | __force_bit2int cpu_to_le32(buffer & 0xFFFFFFFF); |
| 1300 | command_sg->dba_upper = |
| 1301 | __force_bit2int cpu_to_le32((buffer >> 16) >> 16); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1302 | |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1303 | int_cmd->command_header->opts |= |
| 1304 | __force_bit2int cpu_to_le32((1 << 16)); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1305 | } |
| 1306 | |
| 1307 | /* Populate the command header */ |
| 1308 | int_cmd->command_header->byte_count = 0; |
| 1309 | |
| 1310 | /* Issue the command to the hardware */ |
| 1311 | mtip_issue_non_ncq_command(port, MTIP_TAG_INTERNAL); |
| 1312 | |
| 1313 | /* Poll if atomic, wait_for_completion otherwise */ |
| 1314 | if (atomic == GFP_KERNEL) { |
| 1315 | /* Wait for the command to complete or timeout. */ |
| 1316 | if (wait_for_completion_timeout( |
| 1317 | &wait, |
| 1318 | msecs_to_jiffies(timeout)) == 0) { |
| 1319 | dev_err(&port->dd->pdev->dev, |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1320 | "Internal command did not complete [%d] " |
| 1321 | "within timeout of %lu ms\n", |
| 1322 | atomic, timeout); |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1323 | if (mtip_check_surprise_removal(port->dd->pdev) || |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1324 | test_bit(MTIP_DDF_REMOVE_PENDING_BIT, |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1325 | &port->dd->dd_flag)) { |
| 1326 | rv = -ENXIO; |
| 1327 | goto exec_ic_exit; |
| 1328 | } |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1329 | rv = -EAGAIN; |
| 1330 | } |
| 1331 | |
| 1332 | if (readl(port->cmd_issue[MTIP_TAG_INTERNAL]) |
| 1333 | & (1 << MTIP_TAG_INTERNAL)) { |
| 1334 | dev_warn(&port->dd->pdev->dev, |
| 1335 | "Retiring internal command but CI is 1.\n"); |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1336 | if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1337 | &port->dd->dd_flag)) { |
| 1338 | hba_reset_nosleep(port->dd); |
| 1339 | rv = -ENXIO; |
| 1340 | } else { |
| 1341 | mtip_restart_port(port); |
| 1342 | rv = -EAGAIN; |
| 1343 | } |
| 1344 | goto exec_ic_exit; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1345 | } |
| 1346 | |
| 1347 | } else { |
| 1348 | /* Spin for <timeout> checking if command still outstanding */ |
| 1349 | timeout = jiffies + msecs_to_jiffies(timeout); |
Asai Thambi S P | 8182b49 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1350 | while ((readl(port->cmd_issue[MTIP_TAG_INTERNAL]) |
| 1351 | & (1 << MTIP_TAG_INTERNAL)) |
| 1352 | && time_before(jiffies, timeout)) { |
| 1353 | if (mtip_check_surprise_removal(port->dd->pdev)) { |
| 1354 | rv = -ENXIO; |
| 1355 | goto exec_ic_exit; |
| 1356 | } |
| 1357 | if ((fis->command != ATA_CMD_STANDBYNOW1) && |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1358 | test_bit(MTIP_DDF_REMOVE_PENDING_BIT, |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1359 | &port->dd->dd_flag)) { |
| 1360 | rv = -ENXIO; |
| 1361 | goto exec_ic_exit; |
| 1362 | } |
| 1363 | } |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1364 | |
| 1365 | if (readl(port->cmd_issue[MTIP_TAG_INTERNAL]) |
| 1366 | & (1 << MTIP_TAG_INTERNAL)) { |
| 1367 | dev_err(&port->dd->pdev->dev, |
Asai Thambi S P | 8182b49 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1368 | "Internal command did not complete [atomic]\n"); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1369 | rv = -EAGAIN; |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1370 | if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1371 | &port->dd->dd_flag)) { |
| 1372 | hba_reset_nosleep(port->dd); |
| 1373 | rv = -ENXIO; |
| 1374 | } else { |
| 1375 | mtip_restart_port(port); |
| 1376 | rv = -EAGAIN; |
| 1377 | } |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1378 | } |
| 1379 | } |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1380 | exec_ic_exit: |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1381 | /* Clear the allocated and active bits for the internal command. */ |
| 1382 | atomic_set(&int_cmd->active, 0); |
| 1383 | release_slot(port, MTIP_TAG_INTERNAL); |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 1384 | if (rv >= 0 && mtip_pause_ncq(port, fis)) { |
| 1385 | /* NCQ paused */ |
| 1386 | return rv; |
| 1387 | } |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1388 | clear_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags); |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1389 | wake_up_interruptible(&port->svc_wait); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1390 | |
| 1391 | return rv; |
| 1392 | } |
| 1393 | |
| 1394 | /* |
| 1395 | * Byte-swap ATA ID strings. |
| 1396 | * |
| 1397 | * ATA identify data contains strings in byte-swapped 16-bit words. |
| 1398 | * They must be swapped (on all architectures) to be usable as C strings. |
| 1399 | * This function swaps bytes in-place. |
| 1400 | * |
| 1401 | * @buf The buffer location of the string |
| 1402 | * @len The number of bytes to swap |
| 1403 | * |
| 1404 | * return value |
| 1405 | * None |
| 1406 | */ |
| 1407 | static inline void ata_swap_string(u16 *buf, unsigned int len) |
| 1408 | { |
| 1409 | int i; |
| 1410 | for (i = 0; i < (len/2); i++) |
| 1411 | be16_to_cpus(&buf[i]); |
| 1412 | } |
| 1413 | |
| 1414 | /* |
| 1415 | * Request the device identity information. |
| 1416 | * |
| 1417 | * If a user space buffer is not specified, i.e. is NULL, the |
| 1418 | * identify information is still read from the drive and placed |
| 1419 | * into the identify data buffer (@e port->identify) in the |
| 1420 | * port data structure. |
| 1421 | * When the identify buffer contains valid identify information @e |
| 1422 | * port->identify_valid is non-zero. |
| 1423 | * |
| 1424 | * @port Pointer to the port structure. |
| 1425 | * @user_buffer A user space buffer where the identify data should be |
| 1426 | * copied. |
| 1427 | * |
| 1428 | * return value |
| 1429 | * 0 Command completed successfully. |
| 1430 | * -EFAULT An error occurred while coping data to the user buffer. |
| 1431 | * -1 Command failed. |
| 1432 | */ |
| 1433 | static int mtip_get_identify(struct mtip_port *port, void __user *user_buffer) |
| 1434 | { |
| 1435 | int rv = 0; |
| 1436 | struct host_to_dev_fis fis; |
| 1437 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1438 | 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] | 1439 | return -EFAULT; |
| 1440 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1441 | /* Build the FIS. */ |
| 1442 | memset(&fis, 0, sizeof(struct host_to_dev_fis)); |
| 1443 | fis.type = 0x27; |
| 1444 | fis.opts = 1 << 7; |
| 1445 | fis.command = ATA_CMD_ID_ATA; |
| 1446 | |
| 1447 | /* Set the identify information as invalid. */ |
| 1448 | port->identify_valid = 0; |
| 1449 | |
| 1450 | /* Clear the identify information. */ |
| 1451 | memset(port->identify, 0, sizeof(u16) * ATA_ID_WORDS); |
| 1452 | |
| 1453 | /* Execute the command. */ |
| 1454 | if (mtip_exec_internal_command(port, |
| 1455 | &fis, |
| 1456 | 5, |
| 1457 | port->identify_dma, |
| 1458 | sizeof(u16) * ATA_ID_WORDS, |
| 1459 | 0, |
| 1460 | GFP_KERNEL, |
| 1461 | MTIP_INTERNAL_COMMAND_TIMEOUT_MS) |
| 1462 | < 0) { |
| 1463 | rv = -1; |
| 1464 | goto out; |
| 1465 | } |
| 1466 | |
| 1467 | /* |
| 1468 | * Perform any necessary byte-swapping. Yes, the kernel does in fact |
| 1469 | * perform field-sensitive swapping on the string fields. |
| 1470 | * See the kernel use of ata_id_string() for proof of this. |
| 1471 | */ |
| 1472 | #ifdef __LITTLE_ENDIAN |
| 1473 | ata_swap_string(port->identify + 27, 40); /* model string*/ |
| 1474 | ata_swap_string(port->identify + 23, 8); /* firmware string*/ |
| 1475 | ata_swap_string(port->identify + 10, 20); /* serial# string*/ |
| 1476 | #else |
| 1477 | { |
| 1478 | int i; |
| 1479 | for (i = 0; i < ATA_ID_WORDS; i++) |
| 1480 | port->identify[i] = le16_to_cpu(port->identify[i]); |
| 1481 | } |
| 1482 | #endif |
| 1483 | |
| 1484 | /* Set the identify buffer as valid. */ |
| 1485 | port->identify_valid = 1; |
| 1486 | |
| 1487 | if (user_buffer) { |
| 1488 | if (copy_to_user( |
| 1489 | user_buffer, |
| 1490 | port->identify, |
| 1491 | ATA_ID_WORDS * sizeof(u16))) { |
| 1492 | rv = -EFAULT; |
| 1493 | goto out; |
| 1494 | } |
| 1495 | } |
| 1496 | |
| 1497 | out: |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1498 | return rv; |
| 1499 | } |
| 1500 | |
| 1501 | /* |
| 1502 | * Issue a standby immediate command to the device. |
| 1503 | * |
| 1504 | * @port Pointer to the port structure. |
| 1505 | * |
| 1506 | * return value |
| 1507 | * 0 Command was executed successfully. |
| 1508 | * -1 An error occurred while executing the command. |
| 1509 | */ |
| 1510 | static int mtip_standby_immediate(struct mtip_port *port) |
| 1511 | { |
| 1512 | int rv; |
| 1513 | struct host_to_dev_fis fis; |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1514 | unsigned long start; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1515 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1516 | /* Build the FIS. */ |
| 1517 | memset(&fis, 0, sizeof(struct host_to_dev_fis)); |
| 1518 | fis.type = 0x27; |
| 1519 | fis.opts = 1 << 7; |
| 1520 | fis.command = ATA_CMD_STANDBYNOW1; |
| 1521 | |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1522 | start = jiffies; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1523 | rv = mtip_exec_internal_command(port, |
| 1524 | &fis, |
| 1525 | 5, |
| 1526 | 0, |
| 1527 | 0, |
| 1528 | 0, |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1529 | GFP_ATOMIC, |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1530 | 15000); |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 1531 | dbg_printk(MTIP_DRV_NAME "Time taken to complete standby cmd: %d ms\n", |
| 1532 | jiffies_to_msecs(jiffies - start)); |
| 1533 | if (rv) |
| 1534 | dev_warn(&port->dd->pdev->dev, |
| 1535 | "STANDBY IMMEDIATE command failed.\n"); |
| 1536 | |
| 1537 | return rv; |
| 1538 | } |
| 1539 | |
| 1540 | /* |
| 1541 | * Issue a READ LOG EXT command to the device. |
| 1542 | * |
| 1543 | * @port pointer to the port structure. |
| 1544 | * @page page number to fetch |
| 1545 | * @buffer pointer to buffer |
| 1546 | * @buffer_dma dma address corresponding to @buffer |
| 1547 | * @sectors page length to fetch, in sectors |
| 1548 | * |
| 1549 | * return value |
| 1550 | * @rv return value from mtip_exec_internal_command() |
| 1551 | */ |
| 1552 | static int mtip_read_log_page(struct mtip_port *port, u8 page, u16 *buffer, |
| 1553 | dma_addr_t buffer_dma, unsigned int sectors) |
| 1554 | { |
| 1555 | struct host_to_dev_fis fis; |
| 1556 | |
| 1557 | memset(&fis, 0, sizeof(struct host_to_dev_fis)); |
| 1558 | fis.type = 0x27; |
| 1559 | fis.opts = 1 << 7; |
| 1560 | fis.command = ATA_CMD_READ_LOG_EXT; |
| 1561 | fis.sect_count = sectors & 0xFF; |
| 1562 | fis.sect_cnt_ex = (sectors >> 8) & 0xFF; |
| 1563 | fis.lba_low = page; |
| 1564 | fis.lba_mid = 0; |
| 1565 | fis.device = ATA_DEVICE_OBS; |
| 1566 | |
| 1567 | memset(buffer, 0, sectors * ATA_SECT_SIZE); |
| 1568 | |
| 1569 | return mtip_exec_internal_command(port, |
| 1570 | &fis, |
| 1571 | 5, |
| 1572 | buffer_dma, |
| 1573 | sectors * ATA_SECT_SIZE, |
| 1574 | 0, |
| 1575 | GFP_ATOMIC, |
| 1576 | MTIP_INTERNAL_COMMAND_TIMEOUT_MS); |
| 1577 | } |
| 1578 | |
| 1579 | /* |
| 1580 | * Issue a SMART READ DATA command to the device. |
| 1581 | * |
| 1582 | * @port pointer to the port structure. |
| 1583 | * @buffer pointer to buffer |
| 1584 | * @buffer_dma dma address corresponding to @buffer |
| 1585 | * |
| 1586 | * return value |
| 1587 | * @rv return value from mtip_exec_internal_command() |
| 1588 | */ |
| 1589 | static int mtip_get_smart_data(struct mtip_port *port, u8 *buffer, |
| 1590 | dma_addr_t buffer_dma) |
| 1591 | { |
| 1592 | struct host_to_dev_fis fis; |
| 1593 | |
| 1594 | memset(&fis, 0, sizeof(struct host_to_dev_fis)); |
| 1595 | fis.type = 0x27; |
| 1596 | fis.opts = 1 << 7; |
| 1597 | fis.command = ATA_CMD_SMART; |
| 1598 | fis.features = 0xD0; |
| 1599 | fis.sect_count = 1; |
| 1600 | fis.lba_mid = 0x4F; |
| 1601 | fis.lba_hi = 0xC2; |
| 1602 | fis.device = ATA_DEVICE_OBS; |
| 1603 | |
| 1604 | return mtip_exec_internal_command(port, |
| 1605 | &fis, |
| 1606 | 5, |
| 1607 | buffer_dma, |
| 1608 | ATA_SECT_SIZE, |
| 1609 | 0, |
| 1610 | GFP_ATOMIC, |
| 1611 | 15000); |
| 1612 | } |
| 1613 | |
| 1614 | /* |
| 1615 | * Get the value of a smart attribute |
| 1616 | * |
| 1617 | * @port pointer to the port structure |
| 1618 | * @id attribute number |
| 1619 | * @attrib pointer to return attrib information corresponding to @id |
| 1620 | * |
| 1621 | * return value |
| 1622 | * -EINVAL NULL buffer passed or unsupported attribute @id. |
| 1623 | * -EPERM Identify data not valid, SMART not supported or not enabled |
| 1624 | */ |
| 1625 | static int mtip_get_smart_attr(struct mtip_port *port, unsigned int id, |
| 1626 | struct smart_attr *attrib) |
| 1627 | { |
| 1628 | int rv, i; |
| 1629 | struct smart_attr *pattr; |
| 1630 | |
| 1631 | if (!attrib) |
| 1632 | return -EINVAL; |
| 1633 | |
| 1634 | if (!port->identify_valid) { |
| 1635 | dev_warn(&port->dd->pdev->dev, "IDENTIFY DATA not valid\n"); |
| 1636 | return -EPERM; |
| 1637 | } |
| 1638 | if (!(port->identify[82] & 0x1)) { |
| 1639 | dev_warn(&port->dd->pdev->dev, "SMART not supported\n"); |
| 1640 | return -EPERM; |
| 1641 | } |
| 1642 | if (!(port->identify[85] & 0x1)) { |
| 1643 | dev_warn(&port->dd->pdev->dev, "SMART not enabled\n"); |
| 1644 | return -EPERM; |
| 1645 | } |
| 1646 | |
| 1647 | memset(port->smart_buf, 0, ATA_SECT_SIZE); |
| 1648 | rv = mtip_get_smart_data(port, port->smart_buf, port->smart_buf_dma); |
| 1649 | if (rv) { |
| 1650 | dev_warn(&port->dd->pdev->dev, "Failed to ge SMART data\n"); |
| 1651 | return rv; |
| 1652 | } |
| 1653 | |
| 1654 | pattr = (struct smart_attr *)(port->smart_buf + 2); |
| 1655 | for (i = 0; i < 29; i++, pattr++) |
| 1656 | if (pattr->attr_id == id) { |
| 1657 | memcpy(attrib, pattr, sizeof(struct smart_attr)); |
| 1658 | break; |
| 1659 | } |
| 1660 | |
| 1661 | if (i == 29) { |
| 1662 | dev_warn(&port->dd->pdev->dev, |
| 1663 | "Query for invalid SMART attribute ID\n"); |
| 1664 | rv = -EINVAL; |
| 1665 | } |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1666 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1667 | return rv; |
| 1668 | } |
| 1669 | |
| 1670 | /* |
| 1671 | * Get the drive capacity. |
| 1672 | * |
| 1673 | * @dd Pointer to the device data structure. |
| 1674 | * @sectors Pointer to the variable that will receive the sector count. |
| 1675 | * |
| 1676 | * return value |
| 1677 | * 1 Capacity was returned successfully. |
| 1678 | * 0 The identify information is invalid. |
| 1679 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 1680 | 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] | 1681 | { |
| 1682 | struct mtip_port *port = dd->port; |
| 1683 | u64 total, raw0, raw1, raw2, raw3; |
| 1684 | raw0 = port->identify[100]; |
| 1685 | raw1 = port->identify[101]; |
| 1686 | raw2 = port->identify[102]; |
| 1687 | raw3 = port->identify[103]; |
| 1688 | total = raw0 | raw1<<16 | raw2<<32 | raw3<<48; |
| 1689 | *sectors = total; |
| 1690 | return (bool) !!port->identify_valid; |
| 1691 | } |
| 1692 | |
| 1693 | /* |
| 1694 | * Reset the HBA. |
| 1695 | * |
| 1696 | * Resets the HBA by setting the HBA Reset bit in the Global |
| 1697 | * HBA Control register. After setting the HBA Reset bit the |
| 1698 | * function waits for 1 second before reading the HBA Reset |
| 1699 | * bit to make sure it has cleared. If HBA Reset is not clear |
| 1700 | * an error is returned. Cannot be used in non-blockable |
| 1701 | * context. |
| 1702 | * |
| 1703 | * @dd Pointer to the driver data structure. |
| 1704 | * |
| 1705 | * return value |
| 1706 | * 0 The reset was successful. |
| 1707 | * -1 The HBA Reset bit did not clear. |
| 1708 | */ |
| 1709 | static int mtip_hba_reset(struct driver_data *dd) |
| 1710 | { |
| 1711 | mtip_deinit_port(dd->port); |
| 1712 | |
| 1713 | /* Set the reset bit */ |
| 1714 | writel(HOST_RESET, dd->mmio + HOST_CTL); |
| 1715 | |
| 1716 | /* Flush */ |
| 1717 | readl(dd->mmio + HOST_CTL); |
| 1718 | |
| 1719 | /* Wait for reset to clear */ |
| 1720 | ssleep(1); |
| 1721 | |
| 1722 | /* Check the bit has cleared */ |
| 1723 | if (readl(dd->mmio + HOST_CTL) & HOST_RESET) { |
| 1724 | dev_err(&dd->pdev->dev, |
| 1725 | "Reset bit did not clear.\n"); |
| 1726 | return -1; |
| 1727 | } |
| 1728 | |
| 1729 | return 0; |
| 1730 | } |
| 1731 | |
| 1732 | /* |
| 1733 | * Display the identify command data. |
| 1734 | * |
| 1735 | * @port Pointer to the port data structure. |
| 1736 | * |
| 1737 | * return value |
| 1738 | * None |
| 1739 | */ |
| 1740 | static void mtip_dump_identify(struct mtip_port *port) |
| 1741 | { |
| 1742 | sector_t sectors; |
| 1743 | unsigned short revid; |
| 1744 | char cbuf[42]; |
| 1745 | |
| 1746 | if (!port->identify_valid) |
| 1747 | return; |
| 1748 | |
| 1749 | strlcpy(cbuf, (char *)(port->identify+10), 21); |
| 1750 | dev_info(&port->dd->pdev->dev, |
| 1751 | "Serial No.: %s\n", cbuf); |
| 1752 | |
| 1753 | strlcpy(cbuf, (char *)(port->identify+23), 9); |
| 1754 | dev_info(&port->dd->pdev->dev, |
| 1755 | "Firmware Ver.: %s\n", cbuf); |
| 1756 | |
| 1757 | strlcpy(cbuf, (char *)(port->identify+27), 41); |
| 1758 | dev_info(&port->dd->pdev->dev, "Model: %s\n", cbuf); |
| 1759 | |
| 1760 | if (mtip_hw_get_capacity(port->dd, §ors)) |
| 1761 | dev_info(&port->dd->pdev->dev, |
| 1762 | "Capacity: %llu sectors (%llu MB)\n", |
| 1763 | (u64)sectors, |
| 1764 | ((u64)sectors) * ATA_SECT_SIZE >> 20); |
| 1765 | |
| 1766 | 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] | 1767 | switch (revid & 0xFF) { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1768 | case 0x1: |
| 1769 | strlcpy(cbuf, "A0", 3); |
| 1770 | break; |
| 1771 | case 0x3: |
| 1772 | strlcpy(cbuf, "A2", 3); |
| 1773 | break; |
| 1774 | default: |
| 1775 | strlcpy(cbuf, "?", 2); |
| 1776 | break; |
| 1777 | } |
| 1778 | dev_info(&port->dd->pdev->dev, |
| 1779 | "Card Type: %s\n", cbuf); |
| 1780 | } |
| 1781 | |
| 1782 | /* |
| 1783 | * Map the commands scatter list into the command table. |
| 1784 | * |
| 1785 | * @command Pointer to the command. |
| 1786 | * @nents Number of scatter list entries. |
| 1787 | * |
| 1788 | * return value |
| 1789 | * None |
| 1790 | */ |
| 1791 | static inline void fill_command_sg(struct driver_data *dd, |
| 1792 | struct mtip_cmd *command, |
| 1793 | int nents) |
| 1794 | { |
| 1795 | int n; |
| 1796 | unsigned int dma_len; |
| 1797 | struct mtip_cmd_sg *command_sg; |
| 1798 | struct scatterlist *sg = command->sg; |
| 1799 | |
| 1800 | command_sg = command->command + AHCI_CMD_TBL_HDR_SZ; |
| 1801 | |
| 1802 | for (n = 0; n < nents; n++) { |
| 1803 | dma_len = sg_dma_len(sg); |
| 1804 | if (dma_len > 0x400000) |
| 1805 | dev_err(&dd->pdev->dev, |
| 1806 | "DMA segment length truncated\n"); |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1807 | command_sg->info = __force_bit2int |
| 1808 | cpu_to_le32((dma_len-1) & 0x3FFFFF); |
| 1809 | command_sg->dba = __force_bit2int |
| 1810 | cpu_to_le32(sg_dma_address(sg)); |
| 1811 | command_sg->dba_upper = __force_bit2int |
| 1812 | cpu_to_le32((sg_dma_address(sg) >> 16) >> 16); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1813 | command_sg++; |
| 1814 | sg++; |
| 1815 | } |
| 1816 | } |
| 1817 | |
| 1818 | /* |
| 1819 | * @brief Execute a drive command. |
| 1820 | * |
| 1821 | * return value 0 The command completed successfully. |
| 1822 | * return value -1 An error occurred while executing the command. |
| 1823 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 1824 | static int exec_drive_task(struct mtip_port *port, u8 *command) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1825 | { |
| 1826 | struct host_to_dev_fis fis; |
| 1827 | struct host_to_dev_fis *reply = (port->rxfis + RX_FIS_D2H_REG); |
| 1828 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1829 | /* Build the FIS. */ |
| 1830 | memset(&fis, 0, sizeof(struct host_to_dev_fis)); |
| 1831 | fis.type = 0x27; |
| 1832 | fis.opts = 1 << 7; |
| 1833 | fis.command = command[0]; |
| 1834 | fis.features = command[1]; |
| 1835 | fis.sect_count = command[2]; |
| 1836 | fis.sector = command[3]; |
| 1837 | fis.cyl_low = command[4]; |
| 1838 | fis.cyl_hi = command[5]; |
| 1839 | fis.device = command[6] & ~0x10; /* Clear the dev bit*/ |
| 1840 | |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 1841 | 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] | 1842 | __func__, |
| 1843 | command[0], |
| 1844 | command[1], |
| 1845 | command[2], |
| 1846 | command[3], |
| 1847 | command[4], |
| 1848 | command[5], |
| 1849 | command[6]); |
| 1850 | |
| 1851 | /* Execute the command. */ |
| 1852 | if (mtip_exec_internal_command(port, |
| 1853 | &fis, |
| 1854 | 5, |
| 1855 | 0, |
| 1856 | 0, |
| 1857 | 0, |
| 1858 | GFP_KERNEL, |
| 1859 | MTIP_IOCTL_COMMAND_TIMEOUT_MS) < 0) { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1860 | return -1; |
| 1861 | } |
| 1862 | |
| 1863 | command[0] = reply->command; /* Status*/ |
| 1864 | command[1] = reply->features; /* Error*/ |
| 1865 | command[4] = reply->cyl_low; |
| 1866 | command[5] = reply->cyl_hi; |
| 1867 | |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 1868 | 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] | 1869 | __func__, |
| 1870 | command[0], |
| 1871 | command[1], |
| 1872 | command[4], |
| 1873 | command[5]); |
| 1874 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1875 | return 0; |
| 1876 | } |
| 1877 | |
| 1878 | /* |
| 1879 | * @brief Execute a drive command. |
| 1880 | * |
| 1881 | * @param port Pointer to the port data structure. |
| 1882 | * @param command Pointer to the user specified command parameters. |
| 1883 | * @param user_buffer Pointer to the user space buffer where read sector |
| 1884 | * data should be copied. |
| 1885 | * |
| 1886 | * return value 0 The command completed successfully. |
| 1887 | * return value -EFAULT An error occurred while copying the completion |
| 1888 | * data to the user space buffer. |
| 1889 | * return value -1 An error occurred while executing the command. |
| 1890 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 1891 | static int exec_drive_command(struct mtip_port *port, u8 *command, |
| 1892 | void __user *user_buffer) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1893 | { |
| 1894 | struct host_to_dev_fis fis; |
| 1895 | struct host_to_dev_fis *reply = (port->rxfis + RX_FIS_D2H_REG); |
| 1896 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1897 | /* Build the FIS. */ |
| 1898 | memset(&fis, 0, sizeof(struct host_to_dev_fis)); |
| 1899 | fis.type = 0x27; |
| 1900 | fis.opts = 1 << 7; |
| 1901 | fis.command = command[0]; |
| 1902 | fis.features = command[2]; |
| 1903 | fis.sect_count = command[3]; |
| 1904 | if (fis.command == ATA_CMD_SMART) { |
| 1905 | fis.sector = command[1]; |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1906 | fis.cyl_low = 0x4F; |
| 1907 | fis.cyl_hi = 0xC2; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1908 | } |
| 1909 | |
| 1910 | dbg_printk(MTIP_DRV_NAME |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 1911 | " %s: User Command: cmd %x, sect %x, " |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1912 | "feat %x, sectcnt %x\n", |
| 1913 | __func__, |
| 1914 | command[0], |
| 1915 | command[1], |
| 1916 | command[2], |
| 1917 | command[3]); |
| 1918 | |
| 1919 | memset(port->sector_buffer, 0x00, ATA_SECT_SIZE); |
| 1920 | |
| 1921 | /* Execute the command. */ |
| 1922 | if (mtip_exec_internal_command(port, |
| 1923 | &fis, |
| 1924 | 5, |
| 1925 | port->sector_buffer_dma, |
| 1926 | (command[3] != 0) ? ATA_SECT_SIZE : 0, |
| 1927 | 0, |
| 1928 | GFP_KERNEL, |
| 1929 | MTIP_IOCTL_COMMAND_TIMEOUT_MS) |
| 1930 | < 0) { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1931 | return -1; |
| 1932 | } |
| 1933 | |
| 1934 | /* Collect the completion status. */ |
| 1935 | command[0] = reply->command; /* Status*/ |
| 1936 | command[1] = reply->features; /* Error*/ |
| 1937 | command[2] = command[3]; |
| 1938 | |
| 1939 | dbg_printk(MTIP_DRV_NAME |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 1940 | " %s: Completion Status: stat %x, " |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1941 | "err %x, cmd %x\n", |
| 1942 | __func__, |
| 1943 | command[0], |
| 1944 | command[1], |
| 1945 | command[2]); |
| 1946 | |
| 1947 | if (user_buffer && command[3]) { |
| 1948 | if (copy_to_user(user_buffer, |
| 1949 | port->sector_buffer, |
| 1950 | ATA_SECT_SIZE * command[3])) { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1951 | return -EFAULT; |
| 1952 | } |
| 1953 | } |
| 1954 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1955 | return 0; |
| 1956 | } |
| 1957 | |
| 1958 | /* |
| 1959 | * Indicates whether a command has a single sector payload. |
| 1960 | * |
| 1961 | * @command passed to the device to perform the certain event. |
| 1962 | * @features passed to the device to perform the certain event. |
| 1963 | * |
| 1964 | * return value |
| 1965 | * 1 command is one that always has a single sector payload, |
| 1966 | * regardless of the value in the Sector Count field. |
| 1967 | * 0 otherwise |
| 1968 | * |
| 1969 | */ |
| 1970 | static unsigned int implicit_sector(unsigned char command, |
| 1971 | unsigned char features) |
| 1972 | { |
| 1973 | unsigned int rv = 0; |
| 1974 | |
| 1975 | /* list of commands that have an implicit sector count of 1 */ |
| 1976 | switch (command) { |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1977 | case ATA_CMD_SEC_SET_PASS: |
| 1978 | case ATA_CMD_SEC_UNLOCK: |
| 1979 | case ATA_CMD_SEC_ERASE_PREP: |
| 1980 | case ATA_CMD_SEC_ERASE_UNIT: |
| 1981 | case ATA_CMD_SEC_FREEZE_LOCK: |
| 1982 | case ATA_CMD_SEC_DISABLE_PASS: |
| 1983 | case ATA_CMD_PMP_READ: |
| 1984 | case ATA_CMD_PMP_WRITE: |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1985 | rv = 1; |
| 1986 | break; |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1987 | case ATA_CMD_SET_MAX: |
| 1988 | if (features == ATA_SET_MAX_UNLOCK) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1989 | rv = 1; |
| 1990 | break; |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1991 | case ATA_CMD_SMART: |
| 1992 | if ((features == ATA_SMART_READ_VALUES) || |
| 1993 | (features == ATA_SMART_READ_THRESHOLDS)) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1994 | rv = 1; |
| 1995 | break; |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 1996 | case ATA_CMD_CONF_OVERLAY: |
| 1997 | if ((features == ATA_DCO_IDENTIFY) || |
| 1998 | (features == ATA_DCO_SET)) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 1999 | rv = 1; |
| 2000 | break; |
| 2001 | } |
| 2002 | return rv; |
| 2003 | } |
| 2004 | |
Asai Thambi S P | 2df7aa9 | 2012-05-29 18:41:23 -0700 | [diff] [blame^] | 2005 | static void mtip_set_timeout(struct host_to_dev_fis *fis, unsigned int *timeout) |
| 2006 | { |
| 2007 | switch (fis->command) { |
| 2008 | case ATA_CMD_DOWNLOAD_MICRO: |
| 2009 | *timeout = 120000; /* 2 minutes */ |
| 2010 | break; |
| 2011 | case ATA_CMD_SEC_ERASE_UNIT: |
| 2012 | case 0xFC: |
| 2013 | *timeout = 240000; /* 4 minutes */ |
| 2014 | break; |
| 2015 | case ATA_CMD_STANDBYNOW1: |
| 2016 | *timeout = 10000; /* 10 seconds */ |
| 2017 | break; |
| 2018 | case 0xF7: |
| 2019 | case 0xFA: |
| 2020 | *timeout = 60000; /* 60 seconds */ |
| 2021 | break; |
| 2022 | case ATA_CMD_SMART: |
| 2023 | *timeout = 15000; /* 15 seconds */ |
| 2024 | break; |
| 2025 | default: |
| 2026 | *timeout = MTIP_IOCTL_COMMAND_TIMEOUT_MS; |
| 2027 | break; |
| 2028 | } |
| 2029 | } |
| 2030 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2031 | /* |
| 2032 | * Executes a taskfile |
| 2033 | * See ide_taskfile_ioctl() for derivation |
| 2034 | */ |
| 2035 | static int exec_drive_taskfile(struct driver_data *dd, |
Jens Axboe | ef0f158 | 2011-09-27 21:19:53 -0600 | [diff] [blame] | 2036 | void __user *buf, |
| 2037 | ide_task_request_t *req_task, |
| 2038 | int outtotal) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2039 | { |
| 2040 | struct host_to_dev_fis fis; |
| 2041 | struct host_to_dev_fis *reply; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2042 | u8 *outbuf = NULL; |
| 2043 | u8 *inbuf = NULL; |
Jens Axboe | 16d02c0 | 2011-09-27 15:50:01 -0600 | [diff] [blame] | 2044 | dma_addr_t outbuf_dma = 0; |
| 2045 | dma_addr_t inbuf_dma = 0; |
| 2046 | dma_addr_t dma_buffer = 0; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2047 | int err = 0; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2048 | unsigned int taskin = 0; |
| 2049 | unsigned int taskout = 0; |
| 2050 | u8 nsect = 0; |
Asai Thambi S P | 2df7aa9 | 2012-05-29 18:41:23 -0700 | [diff] [blame^] | 2051 | unsigned int timeout; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2052 | unsigned int force_single_sector; |
| 2053 | unsigned int transfer_size; |
| 2054 | unsigned long task_file_data; |
Jens Axboe | ef0f158 | 2011-09-27 21:19:53 -0600 | [diff] [blame] | 2055 | int intotal = outtotal + req_task->out_size; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2056 | |
| 2057 | taskout = req_task->out_size; |
| 2058 | taskin = req_task->in_size; |
| 2059 | /* 130560 = 512 * 0xFF*/ |
| 2060 | if (taskin > 130560 || taskout > 130560) { |
| 2061 | err = -EINVAL; |
| 2062 | goto abort; |
| 2063 | } |
| 2064 | |
| 2065 | if (taskout) { |
| 2066 | outbuf = kzalloc(taskout, GFP_KERNEL); |
| 2067 | if (outbuf == NULL) { |
| 2068 | err = -ENOMEM; |
| 2069 | goto abort; |
| 2070 | } |
| 2071 | if (copy_from_user(outbuf, buf + outtotal, taskout)) { |
| 2072 | err = -EFAULT; |
| 2073 | goto abort; |
| 2074 | } |
| 2075 | outbuf_dma = pci_map_single(dd->pdev, |
| 2076 | outbuf, |
| 2077 | taskout, |
| 2078 | DMA_TO_DEVICE); |
Jens Axboe | 16d02c0 | 2011-09-27 15:50:01 -0600 | [diff] [blame] | 2079 | if (outbuf_dma == 0) { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2080 | err = -ENOMEM; |
| 2081 | goto abort; |
| 2082 | } |
| 2083 | dma_buffer = outbuf_dma; |
| 2084 | } |
| 2085 | |
| 2086 | if (taskin) { |
| 2087 | inbuf = kzalloc(taskin, GFP_KERNEL); |
| 2088 | if (inbuf == NULL) { |
| 2089 | err = -ENOMEM; |
| 2090 | goto abort; |
| 2091 | } |
| 2092 | |
| 2093 | if (copy_from_user(inbuf, buf + intotal, taskin)) { |
| 2094 | err = -EFAULT; |
| 2095 | goto abort; |
| 2096 | } |
| 2097 | inbuf_dma = pci_map_single(dd->pdev, |
| 2098 | inbuf, |
| 2099 | taskin, DMA_FROM_DEVICE); |
Jens Axboe | 16d02c0 | 2011-09-27 15:50:01 -0600 | [diff] [blame] | 2100 | if (inbuf_dma == 0) { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2101 | err = -ENOMEM; |
| 2102 | goto abort; |
| 2103 | } |
| 2104 | dma_buffer = inbuf_dma; |
| 2105 | } |
| 2106 | |
| 2107 | /* only supports PIO and non-data commands from this ioctl. */ |
| 2108 | switch (req_task->data_phase) { |
| 2109 | case TASKFILE_OUT: |
| 2110 | nsect = taskout / ATA_SECT_SIZE; |
| 2111 | reply = (dd->port->rxfis + RX_FIS_PIO_SETUP); |
| 2112 | break; |
| 2113 | case TASKFILE_IN: |
| 2114 | reply = (dd->port->rxfis + RX_FIS_PIO_SETUP); |
| 2115 | break; |
| 2116 | case TASKFILE_NO_DATA: |
| 2117 | reply = (dd->port->rxfis + RX_FIS_D2H_REG); |
| 2118 | break; |
| 2119 | default: |
| 2120 | err = -EINVAL; |
| 2121 | goto abort; |
| 2122 | } |
| 2123 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2124 | /* Build the FIS. */ |
| 2125 | memset(&fis, 0, sizeof(struct host_to_dev_fis)); |
| 2126 | |
| 2127 | fis.type = 0x27; |
| 2128 | fis.opts = 1 << 7; |
| 2129 | fis.command = req_task->io_ports[7]; |
| 2130 | fis.features = req_task->io_ports[1]; |
| 2131 | fis.sect_count = req_task->io_ports[2]; |
| 2132 | fis.lba_low = req_task->io_ports[3]; |
| 2133 | fis.lba_mid = req_task->io_ports[4]; |
| 2134 | fis.lba_hi = req_task->io_ports[5]; |
| 2135 | /* Clear the dev bit*/ |
| 2136 | fis.device = req_task->io_ports[6] & ~0x10; |
| 2137 | |
| 2138 | if ((req_task->in_flags.all == 0) && (req_task->out_flags.all & 1)) { |
| 2139 | req_task->in_flags.all = |
| 2140 | IDE_TASKFILE_STD_IN_FLAGS | |
| 2141 | (IDE_HOB_STD_IN_FLAGS << 8); |
| 2142 | fis.lba_low_ex = req_task->hob_ports[3]; |
| 2143 | fis.lba_mid_ex = req_task->hob_ports[4]; |
| 2144 | fis.lba_hi_ex = req_task->hob_ports[5]; |
| 2145 | fis.features_ex = req_task->hob_ports[1]; |
| 2146 | fis.sect_cnt_ex = req_task->hob_ports[2]; |
| 2147 | |
| 2148 | } else { |
| 2149 | req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS; |
| 2150 | } |
| 2151 | |
| 2152 | force_single_sector = implicit_sector(fis.command, fis.features); |
| 2153 | |
| 2154 | if ((taskin || taskout) && (!fis.sect_count)) { |
| 2155 | if (nsect) |
| 2156 | fis.sect_count = nsect; |
| 2157 | else { |
| 2158 | if (!force_single_sector) { |
| 2159 | dev_warn(&dd->pdev->dev, |
| 2160 | "data movement but " |
| 2161 | "sect_count is 0\n"); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2162 | err = -EINVAL; |
| 2163 | goto abort; |
| 2164 | } |
| 2165 | } |
| 2166 | } |
| 2167 | |
| 2168 | dbg_printk(MTIP_DRV_NAME |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 2169 | " %s: cmd %x, feat %x, nsect %x," |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2170 | " sect/lbal %x, lcyl/lbam %x, hcyl/lbah %x," |
| 2171 | " head/dev %x\n", |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 2172 | __func__, |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2173 | fis.command, |
| 2174 | fis.features, |
| 2175 | fis.sect_count, |
| 2176 | fis.lba_low, |
| 2177 | fis.lba_mid, |
| 2178 | fis.lba_hi, |
| 2179 | fis.device); |
| 2180 | |
Asai Thambi S P | 2df7aa9 | 2012-05-29 18:41:23 -0700 | [diff] [blame^] | 2181 | mtip_set_timeout(&fis, &timeout); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2182 | |
| 2183 | /* Determine the correct transfer size.*/ |
| 2184 | if (force_single_sector) |
| 2185 | transfer_size = ATA_SECT_SIZE; |
| 2186 | else |
| 2187 | transfer_size = ATA_SECT_SIZE * fis.sect_count; |
| 2188 | |
| 2189 | /* Execute the command.*/ |
| 2190 | if (mtip_exec_internal_command(dd->port, |
| 2191 | &fis, |
| 2192 | 5, |
| 2193 | dma_buffer, |
| 2194 | transfer_size, |
| 2195 | 0, |
| 2196 | GFP_KERNEL, |
| 2197 | timeout) < 0) { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2198 | err = -EIO; |
| 2199 | goto abort; |
| 2200 | } |
| 2201 | |
| 2202 | task_file_data = readl(dd->port->mmio+PORT_TFDATA); |
| 2203 | |
| 2204 | if ((req_task->data_phase == TASKFILE_IN) && !(task_file_data & 1)) { |
| 2205 | reply = dd->port->rxfis + RX_FIS_PIO_SETUP; |
| 2206 | req_task->io_ports[7] = reply->control; |
| 2207 | } else { |
| 2208 | reply = dd->port->rxfis + RX_FIS_D2H_REG; |
| 2209 | req_task->io_ports[7] = reply->command; |
| 2210 | } |
| 2211 | |
| 2212 | /* reclaim the DMA buffers.*/ |
| 2213 | if (inbuf_dma) |
| 2214 | pci_unmap_single(dd->pdev, inbuf_dma, |
| 2215 | taskin, DMA_FROM_DEVICE); |
| 2216 | if (outbuf_dma) |
| 2217 | pci_unmap_single(dd->pdev, outbuf_dma, |
| 2218 | taskout, DMA_TO_DEVICE); |
Jens Axboe | 16d02c0 | 2011-09-27 15:50:01 -0600 | [diff] [blame] | 2219 | inbuf_dma = 0; |
| 2220 | outbuf_dma = 0; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2221 | |
| 2222 | /* return the ATA registers to the caller.*/ |
| 2223 | req_task->io_ports[1] = reply->features; |
| 2224 | req_task->io_ports[2] = reply->sect_count; |
| 2225 | req_task->io_ports[3] = reply->lba_low; |
| 2226 | req_task->io_ports[4] = reply->lba_mid; |
| 2227 | req_task->io_ports[5] = reply->lba_hi; |
| 2228 | req_task->io_ports[6] = reply->device; |
| 2229 | |
| 2230 | if (req_task->out_flags.all & 1) { |
| 2231 | |
| 2232 | req_task->hob_ports[3] = reply->lba_low_ex; |
| 2233 | req_task->hob_ports[4] = reply->lba_mid_ex; |
| 2234 | req_task->hob_ports[5] = reply->lba_hi_ex; |
| 2235 | req_task->hob_ports[1] = reply->features_ex; |
| 2236 | req_task->hob_ports[2] = reply->sect_cnt_ex; |
| 2237 | } |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2238 | dbg_printk(MTIP_DRV_NAME |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 2239 | " %s: Completion: stat %x," |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2240 | "err %x, sect_cnt %x, lbalo %x," |
| 2241 | "lbamid %x, lbahi %x, dev %x\n", |
| 2242 | __func__, |
| 2243 | req_task->io_ports[7], |
| 2244 | req_task->io_ports[1], |
| 2245 | req_task->io_ports[2], |
| 2246 | req_task->io_ports[3], |
| 2247 | req_task->io_ports[4], |
| 2248 | req_task->io_ports[5], |
| 2249 | req_task->io_ports[6]); |
| 2250 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2251 | if (taskout) { |
| 2252 | if (copy_to_user(buf + outtotal, outbuf, taskout)) { |
| 2253 | err = -EFAULT; |
| 2254 | goto abort; |
| 2255 | } |
| 2256 | } |
| 2257 | if (taskin) { |
| 2258 | if (copy_to_user(buf + intotal, inbuf, taskin)) { |
| 2259 | err = -EFAULT; |
| 2260 | goto abort; |
| 2261 | } |
| 2262 | } |
| 2263 | abort: |
| 2264 | if (inbuf_dma) |
| 2265 | pci_unmap_single(dd->pdev, inbuf_dma, |
| 2266 | taskin, DMA_FROM_DEVICE); |
| 2267 | if (outbuf_dma) |
| 2268 | pci_unmap_single(dd->pdev, outbuf_dma, |
| 2269 | taskout, DMA_TO_DEVICE); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2270 | kfree(outbuf); |
| 2271 | kfree(inbuf); |
| 2272 | |
| 2273 | return err; |
| 2274 | } |
| 2275 | |
| 2276 | /* |
| 2277 | * Handle IOCTL calls from the Block Layer. |
| 2278 | * |
| 2279 | * This function is called by the Block Layer when it receives an IOCTL |
| 2280 | * command that it does not understand. If the IOCTL command is not supported |
| 2281 | * this function returns -ENOTTY. |
| 2282 | * |
| 2283 | * @dd Pointer to the driver data structure. |
| 2284 | * @cmd IOCTL command passed from the Block Layer. |
| 2285 | * @arg IOCTL argument passed from the Block Layer. |
| 2286 | * |
| 2287 | * return value |
| 2288 | * 0 The IOCTL completed successfully. |
| 2289 | * -ENOTTY The specified command is not supported. |
| 2290 | * -EFAULT An error occurred copying data to a user space buffer. |
| 2291 | * -EIO An error occurred while executing the command. |
| 2292 | */ |
Jens Axboe | ef0f158 | 2011-09-27 21:19:53 -0600 | [diff] [blame] | 2293 | static int mtip_hw_ioctl(struct driver_data *dd, unsigned int cmd, |
| 2294 | unsigned long arg) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2295 | { |
| 2296 | switch (cmd) { |
| 2297 | case HDIO_GET_IDENTITY: |
| 2298 | if (mtip_get_identify(dd->port, (void __user *) arg) < 0) { |
| 2299 | dev_warn(&dd->pdev->dev, |
| 2300 | "Unable to read identity\n"); |
| 2301 | return -EIO; |
| 2302 | } |
| 2303 | |
| 2304 | break; |
| 2305 | case HDIO_DRIVE_CMD: |
| 2306 | { |
| 2307 | u8 drive_command[4]; |
| 2308 | |
| 2309 | /* Copy the user command info to our buffer. */ |
| 2310 | if (copy_from_user(drive_command, |
| 2311 | (void __user *) arg, |
| 2312 | sizeof(drive_command))) |
| 2313 | return -EFAULT; |
| 2314 | |
| 2315 | /* Execute the drive command. */ |
| 2316 | if (exec_drive_command(dd->port, |
| 2317 | drive_command, |
| 2318 | (void __user *) (arg+4))) |
| 2319 | return -EIO; |
| 2320 | |
| 2321 | /* Copy the status back to the users buffer. */ |
| 2322 | if (copy_to_user((void __user *) arg, |
| 2323 | drive_command, |
| 2324 | sizeof(drive_command))) |
| 2325 | return -EFAULT; |
| 2326 | |
| 2327 | break; |
| 2328 | } |
| 2329 | case HDIO_DRIVE_TASK: |
| 2330 | { |
| 2331 | u8 drive_command[7]; |
| 2332 | |
| 2333 | /* Copy the user command info to our buffer. */ |
| 2334 | if (copy_from_user(drive_command, |
| 2335 | (void __user *) arg, |
| 2336 | sizeof(drive_command))) |
| 2337 | return -EFAULT; |
| 2338 | |
| 2339 | /* Execute the drive command. */ |
| 2340 | if (exec_drive_task(dd->port, drive_command)) |
| 2341 | return -EIO; |
| 2342 | |
| 2343 | /* Copy the status back to the users buffer. */ |
| 2344 | if (copy_to_user((void __user *) arg, |
| 2345 | drive_command, |
| 2346 | sizeof(drive_command))) |
| 2347 | return -EFAULT; |
| 2348 | |
| 2349 | break; |
| 2350 | } |
Jens Axboe | ef0f158 | 2011-09-27 21:19:53 -0600 | [diff] [blame] | 2351 | case HDIO_DRIVE_TASKFILE: { |
| 2352 | ide_task_request_t req_task; |
| 2353 | int ret, outtotal; |
| 2354 | |
| 2355 | if (copy_from_user(&req_task, (void __user *) arg, |
| 2356 | sizeof(req_task))) |
| 2357 | return -EFAULT; |
| 2358 | |
| 2359 | outtotal = sizeof(req_task); |
| 2360 | |
| 2361 | ret = exec_drive_taskfile(dd, (void __user *) arg, |
| 2362 | &req_task, outtotal); |
| 2363 | |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2364 | if (copy_to_user((void __user *) arg, &req_task, |
| 2365 | sizeof(req_task))) |
Jens Axboe | ef0f158 | 2011-09-27 21:19:53 -0600 | [diff] [blame] | 2366 | return -EFAULT; |
| 2367 | |
| 2368 | return ret; |
| 2369 | } |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2370 | |
| 2371 | default: |
| 2372 | return -EINVAL; |
| 2373 | } |
| 2374 | return 0; |
| 2375 | } |
| 2376 | |
| 2377 | /* |
| 2378 | * Submit an IO to the hw |
| 2379 | * |
| 2380 | * This function is called by the block layer to issue an io |
| 2381 | * to the device. Upon completion, the callback function will |
| 2382 | * be called with the data parameter passed as the callback data. |
| 2383 | * |
| 2384 | * @dd Pointer to the driver data structure. |
| 2385 | * @start First sector to read. |
| 2386 | * @nsect Number of sectors to read. |
| 2387 | * @nents Number of entries in scatter list for the read command. |
| 2388 | * @tag The tag of this read command. |
| 2389 | * @callback Pointer to the function that should be called |
| 2390 | * when the read completes. |
| 2391 | * @data Callback data passed to the callback function |
| 2392 | * when the read completes. |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2393 | * @dir Direction (read or write) |
| 2394 | * |
| 2395 | * return value |
| 2396 | * None |
| 2397 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 2398 | static void mtip_hw_submit_io(struct driver_data *dd, sector_t start, |
| 2399 | int nsect, int nents, int tag, void *callback, |
Asai Thambi S P | 4e8670e | 2012-02-07 07:54:31 +0100 | [diff] [blame] | 2400 | void *data, int dir) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2401 | { |
| 2402 | struct host_to_dev_fis *fis; |
| 2403 | struct mtip_port *port = dd->port; |
| 2404 | struct mtip_cmd *command = &port->commands[tag]; |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2405 | int dma_dir = (dir == READ) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2406 | |
| 2407 | /* Map the scatter list for DMA access */ |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2408 | nents = dma_map_sg(&dd->pdev->dev, command->sg, nents, dma_dir); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2409 | |
| 2410 | command->scatter_ents = nents; |
| 2411 | |
| 2412 | /* |
| 2413 | * The number of retries for this command before it is |
| 2414 | * reported as a failure to the upper layers. |
| 2415 | */ |
| 2416 | command->retries = MTIP_MAX_RETRIES; |
| 2417 | |
| 2418 | /* Fill out fis */ |
| 2419 | fis = command->command; |
| 2420 | fis->type = 0x27; |
| 2421 | fis->opts = 1 << 7; |
| 2422 | fis->command = |
| 2423 | (dir == READ ? ATA_CMD_FPDMA_READ : ATA_CMD_FPDMA_WRITE); |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2424 | *((unsigned int *) &fis->lba_low) = (start & 0xFFFFFF); |
| 2425 | *((unsigned int *) &fis->lba_low_ex) = ((start >> 24) & 0xFFFFFF); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2426 | fis->device = 1 << 6; |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2427 | fis->features = nsect & 0xFF; |
| 2428 | fis->features_ex = (nsect >> 8) & 0xFF; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2429 | fis->sect_count = ((tag << 3) | (tag >> 5)); |
| 2430 | fis->sect_cnt_ex = 0; |
| 2431 | fis->control = 0; |
| 2432 | fis->res2 = 0; |
| 2433 | fis->res3 = 0; |
| 2434 | fill_command_sg(dd, command, nents); |
| 2435 | |
| 2436 | /* Populate the command header */ |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2437 | command->command_header->opts = |
| 2438 | __force_bit2int cpu_to_le32( |
| 2439 | (nents << 16) | 5 | AHCI_CMD_PREFETCH); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2440 | command->command_header->byte_count = 0; |
| 2441 | |
| 2442 | /* |
| 2443 | * Set the completion function and data for the command |
| 2444 | * within this layer. |
| 2445 | */ |
| 2446 | command->comp_data = dd; |
| 2447 | command->comp_func = mtip_async_complete; |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2448 | command->direction = dma_dir; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2449 | |
| 2450 | /* |
| 2451 | * Set the completion function and data for the command passed |
| 2452 | * from the upper layer. |
| 2453 | */ |
| 2454 | command->async_data = data; |
| 2455 | command->async_callback = callback; |
| 2456 | |
| 2457 | /* |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2458 | * To prevent this command from being issued |
| 2459 | * if an internal command is in progress or error handling is active. |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2460 | */ |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 2461 | if (port->flags & MTIP_PF_PAUSE_IO) { |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2462 | set_bit(tag, port->cmds_to_issue); |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2463 | set_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags); |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2464 | return; |
| 2465 | } |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2466 | |
| 2467 | /* Issue the command to the hardware */ |
| 2468 | mtip_issue_ncq_command(port, tag); |
| 2469 | |
Asai Thambi S P | dad40f1 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2470 | return; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2471 | } |
| 2472 | |
| 2473 | /* |
| 2474 | * Release a command slot. |
| 2475 | * |
| 2476 | * @dd Pointer to the driver data structure. |
| 2477 | * @tag Slot tag |
| 2478 | * |
| 2479 | * return value |
| 2480 | * None |
| 2481 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 2482 | static void mtip_hw_release_scatterlist(struct driver_data *dd, int tag) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2483 | { |
| 2484 | release_slot(dd->port, tag); |
| 2485 | } |
| 2486 | |
| 2487 | /* |
| 2488 | * Obtain a command slot and return its associated scatter list. |
| 2489 | * |
| 2490 | * @dd Pointer to the driver data structure. |
| 2491 | * @tag Pointer to an int that will receive the allocated command |
| 2492 | * slot tag. |
| 2493 | * |
| 2494 | * return value |
| 2495 | * Pointer to the scatter list for the allocated command slot |
| 2496 | * or NULL if no command slots are available. |
| 2497 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 2498 | static struct scatterlist *mtip_hw_get_scatterlist(struct driver_data *dd, |
| 2499 | int *tag) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2500 | { |
| 2501 | /* |
| 2502 | * It is possible that, even with this semaphore, a thread |
| 2503 | * may think that no command slots are available. Therefore, we |
| 2504 | * need to make an attempt to get_slot(). |
| 2505 | */ |
| 2506 | down(&dd->port->cmd_slot); |
| 2507 | *tag = get_slot(dd->port); |
| 2508 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2509 | 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] | 2510 | up(&dd->port->cmd_slot); |
| 2511 | return NULL; |
| 2512 | } |
Asai Thambi S P | a09ba13 | 2012-04-16 21:27:55 +0200 | [diff] [blame] | 2513 | if (unlikely(*tag < 0)) { |
| 2514 | up(&dd->port->cmd_slot); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2515 | return NULL; |
Asai Thambi S P | a09ba13 | 2012-04-16 21:27:55 +0200 | [diff] [blame] | 2516 | } |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2517 | |
| 2518 | return dd->port->commands[*tag].sg; |
| 2519 | } |
| 2520 | |
| 2521 | /* |
| 2522 | * Sysfs register/status dump. |
| 2523 | * |
| 2524 | * @dev Pointer to the device structure, passed by the kernrel. |
| 2525 | * @attr Pointer to the device_attribute structure passed by the kernel. |
| 2526 | * @buf Pointer to the char buffer that will receive the stats info. |
| 2527 | * |
| 2528 | * return value |
| 2529 | * The size, in bytes, of the data copied into buf. |
| 2530 | */ |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2531 | static ssize_t mtip_hw_show_registers(struct device *dev, |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2532 | struct device_attribute *attr, |
| 2533 | char *buf) |
| 2534 | { |
| 2535 | u32 group_allocated; |
| 2536 | struct driver_data *dd = dev_to_disk(dev)->private_data; |
| 2537 | int size = 0; |
| 2538 | int n; |
| 2539 | |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2540 | size += sprintf(&buf[size], "S ACTive:\n"); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2541 | |
| 2542 | for (n = 0; n < dd->slot_groups; n++) |
| 2543 | size += sprintf(&buf[size], "0x%08x\n", |
| 2544 | readl(dd->port->s_active[n])); |
| 2545 | |
| 2546 | size += sprintf(&buf[size], "Command Issue:\n"); |
| 2547 | |
| 2548 | for (n = 0; n < dd->slot_groups; n++) |
| 2549 | size += sprintf(&buf[size], "0x%08x\n", |
| 2550 | readl(dd->port->cmd_issue[n])); |
| 2551 | |
| 2552 | size += sprintf(&buf[size], "Allocated:\n"); |
| 2553 | |
| 2554 | for (n = 0; n < dd->slot_groups; n++) { |
| 2555 | if (sizeof(long) > sizeof(u32)) |
| 2556 | group_allocated = |
| 2557 | dd->port->allocated[n/2] >> (32*(n&1)); |
| 2558 | else |
| 2559 | group_allocated = dd->port->allocated[n]; |
| 2560 | size += sprintf(&buf[size], "0x%08x\n", |
| 2561 | group_allocated); |
| 2562 | } |
| 2563 | |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2564 | size += sprintf(&buf[size], "Completed:\n"); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2565 | |
| 2566 | for (n = 0; n < dd->slot_groups; n++) |
| 2567 | size += sprintf(&buf[size], "0x%08x\n", |
| 2568 | readl(dd->port->completed[n])); |
| 2569 | |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2570 | size += sprintf(&buf[size], "PORT IRQ STAT : 0x%08x\n", |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2571 | readl(dd->port->mmio + PORT_IRQ_STAT)); |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2572 | size += sprintf(&buf[size], "HOST IRQ STAT : 0x%08x\n", |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2573 | readl(dd->mmio + HOST_IRQ_STAT)); |
| 2574 | |
| 2575 | return size; |
| 2576 | } |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2577 | |
| 2578 | static ssize_t mtip_hw_show_status(struct device *dev, |
| 2579 | struct device_attribute *attr, |
| 2580 | char *buf) |
| 2581 | { |
| 2582 | struct driver_data *dd = dev_to_disk(dev)->private_data; |
| 2583 | int size = 0; |
| 2584 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2585 | 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] | 2586 | size += sprintf(buf, "%s", "thermal_shutdown\n"); |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2587 | 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] | 2588 | size += sprintf(buf, "%s", "write_protect\n"); |
| 2589 | else |
| 2590 | size += sprintf(buf, "%s", "online\n"); |
| 2591 | |
| 2592 | return size; |
| 2593 | } |
| 2594 | |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2595 | static DEVICE_ATTR(registers, S_IRUGO, mtip_hw_show_registers, NULL); |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2596 | static DEVICE_ATTR(status, S_IRUGO, mtip_hw_show_status, NULL); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2597 | |
| 2598 | /* |
| 2599 | * Create the sysfs related attributes. |
| 2600 | * |
| 2601 | * @dd Pointer to the driver data structure. |
| 2602 | * @kobj Pointer to the kobj for the block device. |
| 2603 | * |
| 2604 | * return value |
| 2605 | * 0 Operation completed successfully. |
| 2606 | * -EINVAL Invalid parameter. |
| 2607 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 2608 | 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] | 2609 | { |
| 2610 | if (!kobj || !dd) |
| 2611 | return -EINVAL; |
| 2612 | |
| 2613 | if (sysfs_create_file(kobj, &dev_attr_registers.attr)) |
| 2614 | dev_warn(&dd->pdev->dev, |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2615 | "Error creating 'registers' sysfs entry\n"); |
| 2616 | if (sysfs_create_file(kobj, &dev_attr_status.attr)) |
| 2617 | dev_warn(&dd->pdev->dev, |
| 2618 | "Error creating 'status' sysfs entry\n"); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2619 | return 0; |
| 2620 | } |
| 2621 | |
| 2622 | /* |
| 2623 | * Remove the sysfs related attributes. |
| 2624 | * |
| 2625 | * @dd Pointer to the driver data structure. |
| 2626 | * @kobj Pointer to the kobj for the block device. |
| 2627 | * |
| 2628 | * return value |
| 2629 | * 0 Operation completed successfully. |
| 2630 | * -EINVAL Invalid parameter. |
| 2631 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 2632 | 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] | 2633 | { |
| 2634 | if (!kobj || !dd) |
| 2635 | return -EINVAL; |
| 2636 | |
| 2637 | sysfs_remove_file(kobj, &dev_attr_registers.attr); |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2638 | sysfs_remove_file(kobj, &dev_attr_status.attr); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2639 | |
| 2640 | return 0; |
| 2641 | } |
| 2642 | |
| 2643 | /* |
| 2644 | * Perform any init/resume time hardware setup |
| 2645 | * |
| 2646 | * @dd Pointer to the driver data structure. |
| 2647 | * |
| 2648 | * return value |
| 2649 | * None |
| 2650 | */ |
| 2651 | static inline void hba_setup(struct driver_data *dd) |
| 2652 | { |
| 2653 | u32 hwdata; |
| 2654 | hwdata = readl(dd->mmio + HOST_HSORG); |
| 2655 | |
| 2656 | /* interrupt bug workaround: use only 1 IS bit.*/ |
| 2657 | writel(hwdata | |
| 2658 | HSORG_DISABLE_SLOTGRP_INTR | |
| 2659 | HSORG_DISABLE_SLOTGRP_PXIS, |
| 2660 | dd->mmio + HOST_HSORG); |
| 2661 | } |
| 2662 | |
| 2663 | /* |
| 2664 | * Detect the details of the product, and store anything needed |
| 2665 | * into the driver data structure. This includes product type and |
| 2666 | * version and number of slot groups. |
| 2667 | * |
| 2668 | * @dd Pointer to the driver data structure. |
| 2669 | * |
| 2670 | * return value |
| 2671 | * None |
| 2672 | */ |
| 2673 | static void mtip_detect_product(struct driver_data *dd) |
| 2674 | { |
| 2675 | u32 hwdata; |
| 2676 | unsigned int rev, slotgroups; |
| 2677 | |
| 2678 | /* |
| 2679 | * HBA base + 0xFC [15:0] - vendor-specific hardware interface |
| 2680 | * info register: |
| 2681 | * [15:8] hardware/software interface rev# |
| 2682 | * [ 3] asic-style interface |
| 2683 | * [ 2:0] number of slot groups, minus 1 (only valid for asic-style). |
| 2684 | */ |
| 2685 | hwdata = readl(dd->mmio + HOST_HSORG); |
| 2686 | |
| 2687 | dd->product_type = MTIP_PRODUCT_UNKNOWN; |
| 2688 | dd->slot_groups = 1; |
| 2689 | |
| 2690 | if (hwdata & 0x8) { |
| 2691 | dd->product_type = MTIP_PRODUCT_ASICFPGA; |
| 2692 | rev = (hwdata & HSORG_HWREV) >> 8; |
| 2693 | slotgroups = (hwdata & HSORG_SLOTGROUPS) + 1; |
| 2694 | dev_info(&dd->pdev->dev, |
| 2695 | "ASIC-FPGA design, HS rev 0x%x, " |
| 2696 | "%i slot groups [%i slots]\n", |
| 2697 | rev, |
| 2698 | slotgroups, |
| 2699 | slotgroups * 32); |
| 2700 | |
| 2701 | if (slotgroups > MTIP_MAX_SLOT_GROUPS) { |
| 2702 | dev_warn(&dd->pdev->dev, |
| 2703 | "Warning: driver only supports " |
| 2704 | "%i slot groups.\n", MTIP_MAX_SLOT_GROUPS); |
| 2705 | slotgroups = MTIP_MAX_SLOT_GROUPS; |
| 2706 | } |
| 2707 | dd->slot_groups = slotgroups; |
| 2708 | return; |
| 2709 | } |
| 2710 | |
| 2711 | dev_warn(&dd->pdev->dev, "Unrecognized product id\n"); |
| 2712 | } |
| 2713 | |
| 2714 | /* |
| 2715 | * Blocking wait for FTL rebuild to complete |
| 2716 | * |
| 2717 | * @dd Pointer to the DRIVER_DATA structure. |
| 2718 | * |
| 2719 | * return value |
| 2720 | * 0 FTL rebuild completed successfully |
| 2721 | * -EFAULT FTL rebuild error/timeout/interruption |
| 2722 | */ |
| 2723 | static int mtip_ftl_rebuild_poll(struct driver_data *dd) |
| 2724 | { |
| 2725 | unsigned long timeout, cnt = 0, start; |
| 2726 | |
| 2727 | dev_warn(&dd->pdev->dev, |
| 2728 | "FTL rebuild in progress. Polling for completion.\n"); |
| 2729 | |
| 2730 | start = jiffies; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2731 | timeout = jiffies + msecs_to_jiffies(MTIP_FTL_REBUILD_TIMEOUT_MS); |
| 2732 | |
| 2733 | do { |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2734 | if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2735 | &dd->dd_flag))) |
| 2736 | return -EFAULT; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2737 | if (mtip_check_surprise_removal(dd->pdev)) |
| 2738 | return -EFAULT; |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2739 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2740 | if (mtip_get_identify(dd->port, NULL) < 0) |
| 2741 | return -EFAULT; |
| 2742 | |
| 2743 | if (*(dd->port->identify + MTIP_FTL_REBUILD_OFFSET) == |
| 2744 | MTIP_FTL_REBUILD_MAGIC) { |
| 2745 | ssleep(1); |
| 2746 | /* Print message every 3 minutes */ |
| 2747 | if (cnt++ >= 180) { |
| 2748 | dev_warn(&dd->pdev->dev, |
| 2749 | "FTL rebuild in progress (%d secs).\n", |
| 2750 | jiffies_to_msecs(jiffies - start) / 1000); |
| 2751 | cnt = 0; |
| 2752 | } |
| 2753 | } else { |
| 2754 | dev_warn(&dd->pdev->dev, |
| 2755 | "FTL rebuild complete (%d secs).\n", |
| 2756 | jiffies_to_msecs(jiffies - start) / 1000); |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 2757 | mtip_block_initialize(dd); |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2758 | return 0; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2759 | } |
| 2760 | ssleep(10); |
| 2761 | } while (time_before(jiffies, timeout)); |
| 2762 | |
| 2763 | /* Check for timeout */ |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2764 | dev_err(&dd->pdev->dev, |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2765 | "Timed out waiting for FTL rebuild to complete (%d secs).\n", |
| 2766 | jiffies_to_msecs(jiffies - start) / 1000); |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2767 | return -EFAULT; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2768 | } |
| 2769 | |
| 2770 | /* |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2771 | * service thread to issue queued commands |
| 2772 | * |
| 2773 | * @data Pointer to the driver data structure. |
| 2774 | * |
| 2775 | * return value |
| 2776 | * 0 |
| 2777 | */ |
| 2778 | |
| 2779 | static int mtip_service_thread(void *data) |
| 2780 | { |
| 2781 | struct driver_data *dd = (struct driver_data *)data; |
| 2782 | unsigned long slot, slot_start, slot_wrap; |
| 2783 | unsigned int num_cmd_slots = dd->slot_groups * 32; |
| 2784 | struct mtip_port *port = dd->port; |
| 2785 | |
| 2786 | while (1) { |
| 2787 | /* |
| 2788 | * the condition is to check neither an internal command is |
| 2789 | * is in progress nor error handling is active |
| 2790 | */ |
| 2791 | wait_event_interruptible(port->svc_wait, (port->flags) && |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 2792 | !(port->flags & MTIP_PF_PAUSE_IO)); |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2793 | |
| 2794 | if (kthread_should_stop()) |
| 2795 | break; |
| 2796 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2797 | if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2798 | &dd->dd_flag))) |
| 2799 | break; |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 2800 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2801 | set_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags); |
| 2802 | if (test_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags)) { |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2803 | slot = 1; |
| 2804 | /* used to restrict the loop to one iteration */ |
| 2805 | slot_start = num_cmd_slots; |
| 2806 | slot_wrap = 0; |
| 2807 | while (1) { |
| 2808 | slot = find_next_bit(port->cmds_to_issue, |
| 2809 | num_cmd_slots, slot); |
| 2810 | if (slot_wrap == 1) { |
| 2811 | if ((slot_start >= slot) || |
| 2812 | (slot >= num_cmd_slots)) |
| 2813 | break; |
| 2814 | } |
| 2815 | if (unlikely(slot_start == num_cmd_slots)) |
| 2816 | slot_start = slot; |
| 2817 | |
| 2818 | if (unlikely(slot == num_cmd_slots)) { |
| 2819 | slot = 1; |
| 2820 | slot_wrap = 1; |
| 2821 | continue; |
| 2822 | } |
| 2823 | |
| 2824 | /* Issue the command to the hardware */ |
| 2825 | mtip_issue_ncq_command(port, slot); |
| 2826 | |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2827 | clear_bit(slot, port->cmds_to_issue); |
| 2828 | } |
| 2829 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2830 | clear_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags); |
| 2831 | } else if (test_bit(MTIP_PF_REBUILD_BIT, &port->flags)) { |
Asai Thambi S P | 8182b49 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2832 | if (!mtip_ftl_rebuild_poll(dd)) |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2833 | set_bit(MTIP_DDF_REBUILD_FAILED_BIT, |
Asai Thambi S P | 8182b49 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2834 | &dd->dd_flag); |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2835 | clear_bit(MTIP_PF_REBUILD_BIT, &port->flags); |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2836 | } |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2837 | clear_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags); |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 2838 | |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 2839 | 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] | 2840 | break; |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2841 | } |
| 2842 | return 0; |
| 2843 | } |
| 2844 | |
| 2845 | /* |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2846 | * Called once for each card. |
| 2847 | * |
| 2848 | * @dd Pointer to the driver data structure. |
| 2849 | * |
| 2850 | * return value |
| 2851 | * 0 on success, else an error code. |
| 2852 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 2853 | static int mtip_hw_init(struct driver_data *dd) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2854 | { |
| 2855 | int i; |
| 2856 | int rv; |
| 2857 | unsigned int num_command_slots; |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2858 | unsigned long timeout, timetaken; |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2859 | unsigned char *buf; |
| 2860 | struct smart_attr attr242; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2861 | |
| 2862 | dd->mmio = pcim_iomap_table(dd->pdev)[MTIP_ABAR]; |
| 2863 | |
| 2864 | mtip_detect_product(dd); |
| 2865 | if (dd->product_type == MTIP_PRODUCT_UNKNOWN) { |
| 2866 | rv = -EIO; |
| 2867 | goto out1; |
| 2868 | } |
| 2869 | num_command_slots = dd->slot_groups * 32; |
| 2870 | |
| 2871 | hba_setup(dd); |
| 2872 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2873 | tasklet_init(&dd->tasklet, mtip_tasklet, (unsigned long)dd); |
| 2874 | |
| 2875 | dd->port = kzalloc(sizeof(struct mtip_port), GFP_KERNEL); |
| 2876 | if (!dd->port) { |
| 2877 | dev_err(&dd->pdev->dev, |
| 2878 | "Memory allocation: port structure\n"); |
| 2879 | return -ENOMEM; |
| 2880 | } |
| 2881 | |
| 2882 | /* Counting semaphore to track command slot usage */ |
| 2883 | sema_init(&dd->port->cmd_slot, num_command_slots - 1); |
| 2884 | |
| 2885 | /* Spinlock to prevent concurrent issue */ |
| 2886 | spin_lock_init(&dd->port->cmd_issue_lock); |
| 2887 | |
| 2888 | /* Set the port mmio base address. */ |
| 2889 | dd->port->mmio = dd->mmio + PORT_OFFSET; |
| 2890 | dd->port->dd = dd; |
| 2891 | |
| 2892 | /* Allocate memory for the command list. */ |
| 2893 | dd->port->command_list = |
| 2894 | dmam_alloc_coherent(&dd->pdev->dev, |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2895 | HW_PORT_PRIV_DMA_SZ + (ATA_SECT_SIZE * 4), |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2896 | &dd->port->command_list_dma, |
| 2897 | GFP_KERNEL); |
| 2898 | if (!dd->port->command_list) { |
| 2899 | dev_err(&dd->pdev->dev, |
| 2900 | "Memory allocation: command list\n"); |
| 2901 | rv = -ENOMEM; |
| 2902 | goto out1; |
| 2903 | } |
| 2904 | |
| 2905 | /* Clear the memory we have allocated. */ |
| 2906 | memset(dd->port->command_list, |
| 2907 | 0, |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2908 | HW_PORT_PRIV_DMA_SZ + (ATA_SECT_SIZE * 4)); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2909 | |
| 2910 | /* Setup the addresse of the RX FIS. */ |
| 2911 | dd->port->rxfis = dd->port->command_list + HW_CMD_SLOT_SZ; |
| 2912 | dd->port->rxfis_dma = dd->port->command_list_dma + HW_CMD_SLOT_SZ; |
| 2913 | |
| 2914 | /* Setup the address of the command tables. */ |
| 2915 | dd->port->command_table = dd->port->rxfis + AHCI_RX_FIS_SZ; |
| 2916 | dd->port->command_tbl_dma = dd->port->rxfis_dma + AHCI_RX_FIS_SZ; |
| 2917 | |
| 2918 | /* Setup the address of the identify data. */ |
| 2919 | dd->port->identify = dd->port->command_table + |
| 2920 | HW_CMD_TBL_AR_SZ; |
| 2921 | dd->port->identify_dma = dd->port->command_tbl_dma + |
| 2922 | HW_CMD_TBL_AR_SZ; |
| 2923 | |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2924 | /* Setup the address of the sector buffer - for some non-ncq cmds */ |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2925 | dd->port->sector_buffer = (void *) dd->port->identify + ATA_SECT_SIZE; |
| 2926 | dd->port->sector_buffer_dma = dd->port->identify_dma + ATA_SECT_SIZE; |
| 2927 | |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2928 | /* Setup the address of the log buf - for read log command */ |
| 2929 | dd->port->log_buf = (void *)dd->port->sector_buffer + ATA_SECT_SIZE; |
| 2930 | dd->port->log_buf_dma = dd->port->sector_buffer_dma + ATA_SECT_SIZE; |
| 2931 | |
| 2932 | /* Setup the address of the smart buf - for smart read data command */ |
| 2933 | dd->port->smart_buf = (void *)dd->port->log_buf + ATA_SECT_SIZE; |
| 2934 | dd->port->smart_buf_dma = dd->port->log_buf_dma + ATA_SECT_SIZE; |
| 2935 | |
| 2936 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2937 | /* Point the command headers at the command tables. */ |
| 2938 | for (i = 0; i < num_command_slots; i++) { |
| 2939 | dd->port->commands[i].command_header = |
| 2940 | dd->port->command_list + |
| 2941 | (sizeof(struct mtip_cmd_hdr) * i); |
| 2942 | dd->port->commands[i].command_header_dma = |
| 2943 | dd->port->command_list_dma + |
| 2944 | (sizeof(struct mtip_cmd_hdr) * i); |
| 2945 | |
| 2946 | dd->port->commands[i].command = |
| 2947 | dd->port->command_table + (HW_CMD_TBL_SZ * i); |
| 2948 | dd->port->commands[i].command_dma = |
| 2949 | dd->port->command_tbl_dma + (HW_CMD_TBL_SZ * i); |
| 2950 | |
| 2951 | if (readl(dd->mmio + HOST_CAP) & HOST_CAP_64) |
| 2952 | dd->port->commands[i].command_header->ctbau = |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2953 | __force_bit2int cpu_to_le32( |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2954 | (dd->port->commands[i].command_dma >> 16) >> 16); |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 2955 | dd->port->commands[i].command_header->ctba = |
| 2956 | __force_bit2int cpu_to_le32( |
| 2957 | dd->port->commands[i].command_dma & 0xFFFFFFFF); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 2958 | |
| 2959 | /* |
| 2960 | * If this is not done, a bug is reported by the stock |
| 2961 | * FC11 i386. Due to the fact that it has lots of kernel |
| 2962 | * debugging enabled. |
| 2963 | */ |
| 2964 | sg_init_table(dd->port->commands[i].sg, MTIP_MAX_SG); |
| 2965 | |
| 2966 | /* Mark all commands as currently inactive.*/ |
| 2967 | atomic_set(&dd->port->commands[i].active, 0); |
| 2968 | } |
| 2969 | |
| 2970 | /* Setup the pointers to the extended s_active and CI registers. */ |
| 2971 | for (i = 0; i < dd->slot_groups; i++) { |
| 2972 | dd->port->s_active[i] = |
| 2973 | dd->port->mmio + i*0x80 + PORT_SCR_ACT; |
| 2974 | dd->port->cmd_issue[i] = |
| 2975 | dd->port->mmio + i*0x80 + PORT_COMMAND_ISSUE; |
| 2976 | dd->port->completed[i] = |
| 2977 | dd->port->mmio + i*0x80 + PORT_SDBV; |
| 2978 | } |
| 2979 | |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2980 | timetaken = jiffies; |
| 2981 | timeout = jiffies + msecs_to_jiffies(30000); |
| 2982 | while (((readl(dd->port->mmio + PORT_SCR_STAT) & 0x0F) != 0x03) && |
| 2983 | time_before(jiffies, timeout)) { |
| 2984 | mdelay(100); |
| 2985 | } |
| 2986 | if (unlikely(mtip_check_surprise_removal(dd->pdev))) { |
| 2987 | timetaken = jiffies - timetaken; |
| 2988 | dev_warn(&dd->pdev->dev, |
| 2989 | "Surprise removal detected at %u ms\n", |
| 2990 | jiffies_to_msecs(timetaken)); |
| 2991 | rv = -ENODEV; |
| 2992 | goto out2 ; |
| 2993 | } |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 2994 | 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] | 2995 | timetaken = jiffies - timetaken; |
| 2996 | dev_warn(&dd->pdev->dev, |
| 2997 | "Removal detected at %u ms\n", |
| 2998 | jiffies_to_msecs(timetaken)); |
| 2999 | rv = -EFAULT; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3000 | goto out2; |
| 3001 | } |
| 3002 | |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3003 | /* Conditionally reset the HBA. */ |
| 3004 | if (!(readl(dd->mmio + HOST_CAP) & HOST_CAP_NZDMA)) { |
| 3005 | if (mtip_hba_reset(dd) < 0) { |
| 3006 | dev_err(&dd->pdev->dev, |
| 3007 | "Card did not reset within timeout\n"); |
| 3008 | rv = -EIO; |
| 3009 | goto out2; |
| 3010 | } |
| 3011 | } else { |
| 3012 | /* Clear any pending interrupts on the HBA */ |
| 3013 | writel(readl(dd->mmio + HOST_IRQ_STAT), |
| 3014 | dd->mmio + HOST_IRQ_STAT); |
| 3015 | } |
| 3016 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3017 | mtip_init_port(dd->port); |
| 3018 | mtip_start_port(dd->port); |
| 3019 | |
| 3020 | /* Setup the ISR and enable interrupts. */ |
| 3021 | rv = devm_request_irq(&dd->pdev->dev, |
| 3022 | dd->pdev->irq, |
| 3023 | mtip_irq_handler, |
| 3024 | IRQF_SHARED, |
| 3025 | dev_driver_string(&dd->pdev->dev), |
| 3026 | dd); |
| 3027 | |
| 3028 | if (rv) { |
| 3029 | dev_err(&dd->pdev->dev, |
| 3030 | "Unable to allocate IRQ %d\n", dd->pdev->irq); |
| 3031 | goto out2; |
| 3032 | } |
| 3033 | |
| 3034 | /* Enable interrupts on the HBA. */ |
| 3035 | writel(readl(dd->mmio + HOST_CTL) | HOST_IRQ_EN, |
| 3036 | dd->mmio + HOST_CTL); |
| 3037 | |
| 3038 | init_timer(&dd->port->cmd_timer); |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 3039 | init_waitqueue_head(&dd->port->svc_wait); |
| 3040 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3041 | dd->port->cmd_timer.data = (unsigned long int) dd->port; |
| 3042 | dd->port->cmd_timer.function = mtip_timeout_function; |
| 3043 | mod_timer(&dd->port->cmd_timer, |
| 3044 | jiffies + msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD)); |
| 3045 | |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3046 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3047 | 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] | 3048 | rv = -EFAULT; |
| 3049 | goto out3; |
| 3050 | } |
| 3051 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3052 | if (mtip_get_identify(dd->port, NULL) < 0) { |
| 3053 | rv = -EFAULT; |
| 3054 | goto out3; |
| 3055 | } |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3056 | |
| 3057 | if (*(dd->port->identify + MTIP_FTL_REBUILD_OFFSET) == |
| 3058 | MTIP_FTL_REBUILD_MAGIC) { |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3059 | set_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags); |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 3060 | return MTIP_FTL_REBUILD_MAGIC; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3061 | } |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 3062 | mtip_dump_identify(dd->port); |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3063 | |
| 3064 | /* check write protect, over temp and rebuild statuses */ |
| 3065 | rv = mtip_read_log_page(dd->port, ATA_LOG_SATA_NCQ, |
| 3066 | dd->port->log_buf, |
| 3067 | dd->port->log_buf_dma, 1); |
| 3068 | if (rv) { |
| 3069 | dev_warn(&dd->pdev->dev, |
| 3070 | "Error in READ LOG EXT (10h) command\n"); |
| 3071 | /* non-critical error, don't fail the load */ |
| 3072 | } else { |
| 3073 | buf = (unsigned char *)dd->port->log_buf; |
| 3074 | if (buf[259] & 0x1) { |
| 3075 | dev_info(&dd->pdev->dev, |
| 3076 | "Write protect bit is set.\n"); |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3077 | set_bit(MTIP_DDF_WRITE_PROTECT_BIT, &dd->dd_flag); |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3078 | } |
| 3079 | if (buf[288] == 0xF7) { |
| 3080 | dev_info(&dd->pdev->dev, |
| 3081 | "Exceeded Tmax, drive in thermal shutdown.\n"); |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3082 | set_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag); |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3083 | } |
| 3084 | if (buf[288] == 0xBF) { |
| 3085 | dev_info(&dd->pdev->dev, |
| 3086 | "Drive indicates rebuild has failed.\n"); |
| 3087 | /* TODO */ |
| 3088 | } |
| 3089 | } |
| 3090 | |
| 3091 | /* get write protect progess */ |
| 3092 | memset(&attr242, 0, sizeof(struct smart_attr)); |
| 3093 | if (mtip_get_smart_attr(dd->port, 242, &attr242)) |
| 3094 | dev_warn(&dd->pdev->dev, |
| 3095 | "Unable to check write protect progress\n"); |
| 3096 | else |
| 3097 | dev_info(&dd->pdev->dev, |
| 3098 | "Write protect progress: %d%% (%d blocks)\n", |
| 3099 | attr242.cur, attr242.data); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3100 | return rv; |
| 3101 | |
| 3102 | out3: |
| 3103 | del_timer_sync(&dd->port->cmd_timer); |
| 3104 | |
| 3105 | /* Disable interrupts on the HBA. */ |
| 3106 | writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN, |
| 3107 | dd->mmio + HOST_CTL); |
| 3108 | |
| 3109 | /*Release the IRQ. */ |
| 3110 | devm_free_irq(&dd->pdev->dev, dd->pdev->irq, dd); |
| 3111 | |
| 3112 | out2: |
| 3113 | mtip_deinit_port(dd->port); |
| 3114 | |
| 3115 | /* Free the command/command header memory. */ |
| 3116 | dmam_free_coherent(&dd->pdev->dev, |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3117 | HW_PORT_PRIV_DMA_SZ + (ATA_SECT_SIZE * 4), |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3118 | dd->port->command_list, |
| 3119 | dd->port->command_list_dma); |
| 3120 | out1: |
| 3121 | /* Free the memory allocated for the for structure. */ |
| 3122 | kfree(dd->port); |
| 3123 | |
| 3124 | return rv; |
| 3125 | } |
| 3126 | |
| 3127 | /* |
| 3128 | * Called to deinitialize an interface. |
| 3129 | * |
| 3130 | * @dd Pointer to the driver data structure. |
| 3131 | * |
| 3132 | * return value |
| 3133 | * 0 |
| 3134 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 3135 | static int mtip_hw_exit(struct driver_data *dd) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3136 | { |
| 3137 | /* |
| 3138 | * Send standby immediate (E0h) to the drive so that it |
| 3139 | * saves its state. |
| 3140 | */ |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3141 | if (!test_bit(MTIP_DDF_CLEANUP_BIT, &dd->dd_flag)) { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3142 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3143 | if (!test_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags)) |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3144 | if (mtip_standby_immediate(dd->port)) |
| 3145 | dev_warn(&dd->pdev->dev, |
| 3146 | "STANDBY IMMEDIATE failed\n"); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3147 | |
| 3148 | /* de-initialize the port. */ |
| 3149 | mtip_deinit_port(dd->port); |
| 3150 | |
| 3151 | /* Disable interrupts on the HBA. */ |
| 3152 | writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN, |
| 3153 | dd->mmio + HOST_CTL); |
| 3154 | } |
| 3155 | |
| 3156 | del_timer_sync(&dd->port->cmd_timer); |
| 3157 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3158 | /* Release the IRQ. */ |
| 3159 | devm_free_irq(&dd->pdev->dev, dd->pdev->irq, dd); |
| 3160 | |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 3161 | /* Stop the bottom half tasklet. */ |
| 3162 | tasklet_kill(&dd->tasklet); |
| 3163 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3164 | /* Free the command/command header memory. */ |
| 3165 | dmam_free_coherent(&dd->pdev->dev, |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3166 | HW_PORT_PRIV_DMA_SZ + (ATA_SECT_SIZE * 4), |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3167 | dd->port->command_list, |
| 3168 | dd->port->command_list_dma); |
| 3169 | /* Free the memory allocated for the for structure. */ |
| 3170 | kfree(dd->port); |
| 3171 | |
| 3172 | return 0; |
| 3173 | } |
| 3174 | |
| 3175 | /* |
| 3176 | * Issue a Standby Immediate command to the device. |
| 3177 | * |
| 3178 | * This function is called by the Block Layer just before the |
| 3179 | * system powers off during a shutdown. |
| 3180 | * |
| 3181 | * @dd Pointer to the driver data structure. |
| 3182 | * |
| 3183 | * return value |
| 3184 | * 0 |
| 3185 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 3186 | static int mtip_hw_shutdown(struct driver_data *dd) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3187 | { |
| 3188 | /* |
| 3189 | * Send standby immediate (E0h) to the drive so that it |
| 3190 | * saves its state. |
| 3191 | */ |
| 3192 | mtip_standby_immediate(dd->port); |
| 3193 | |
| 3194 | return 0; |
| 3195 | } |
| 3196 | |
| 3197 | /* |
| 3198 | * Suspend function |
| 3199 | * |
| 3200 | * This function is called by the Block Layer just before the |
| 3201 | * system hibernates. |
| 3202 | * |
| 3203 | * @dd Pointer to the driver data structure. |
| 3204 | * |
| 3205 | * return value |
| 3206 | * 0 Suspend was successful |
| 3207 | * -EFAULT Suspend was not successful |
| 3208 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 3209 | static int mtip_hw_suspend(struct driver_data *dd) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3210 | { |
| 3211 | /* |
| 3212 | * Send standby immediate (E0h) to the drive |
| 3213 | * so that it saves its state. |
| 3214 | */ |
| 3215 | if (mtip_standby_immediate(dd->port) != 0) { |
| 3216 | dev_err(&dd->pdev->dev, |
| 3217 | "Failed standby-immediate command\n"); |
| 3218 | return -EFAULT; |
| 3219 | } |
| 3220 | |
| 3221 | /* Disable interrupts on the HBA.*/ |
| 3222 | writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN, |
| 3223 | dd->mmio + HOST_CTL); |
| 3224 | mtip_deinit_port(dd->port); |
| 3225 | |
| 3226 | return 0; |
| 3227 | } |
| 3228 | |
| 3229 | /* |
| 3230 | * Resume function |
| 3231 | * |
| 3232 | * This function is called by the Block Layer as the |
| 3233 | * system resumes. |
| 3234 | * |
| 3235 | * @dd Pointer to the driver data structure. |
| 3236 | * |
| 3237 | * return value |
| 3238 | * 0 Resume was successful |
| 3239 | * -EFAULT Resume was not successful |
| 3240 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 3241 | static int mtip_hw_resume(struct driver_data *dd) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3242 | { |
| 3243 | /* Perform any needed hardware setup steps */ |
| 3244 | hba_setup(dd); |
| 3245 | |
| 3246 | /* Reset the HBA */ |
| 3247 | if (mtip_hba_reset(dd) != 0) { |
| 3248 | dev_err(&dd->pdev->dev, |
| 3249 | "Unable to reset the HBA\n"); |
| 3250 | return -EFAULT; |
| 3251 | } |
| 3252 | |
| 3253 | /* |
| 3254 | * Enable the port, DMA engine, and FIS reception specific |
| 3255 | * h/w in controller. |
| 3256 | */ |
| 3257 | mtip_init_port(dd->port); |
| 3258 | mtip_start_port(dd->port); |
| 3259 | |
| 3260 | /* Enable interrupts on the HBA.*/ |
| 3261 | writel(readl(dd->mmio + HOST_CTL) | HOST_IRQ_EN, |
| 3262 | dd->mmio + HOST_CTL); |
| 3263 | |
| 3264 | return 0; |
| 3265 | } |
| 3266 | |
| 3267 | /* |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3268 | * Helper function for reusing disk name |
| 3269 | * upon hot insertion. |
| 3270 | */ |
| 3271 | static int rssd_disk_name_format(char *prefix, |
| 3272 | int index, |
| 3273 | char *buf, |
| 3274 | int buflen) |
| 3275 | { |
| 3276 | const int base = 'z' - 'a' + 1; |
| 3277 | char *begin = buf + strlen(prefix); |
| 3278 | char *end = buf + buflen; |
| 3279 | char *p; |
| 3280 | int unit; |
| 3281 | |
| 3282 | p = end - 1; |
| 3283 | *p = '\0'; |
| 3284 | unit = base; |
| 3285 | do { |
| 3286 | if (p == begin) |
| 3287 | return -EINVAL; |
| 3288 | *--p = 'a' + (index % unit); |
| 3289 | index = (index / unit) - 1; |
| 3290 | } while (index >= 0); |
| 3291 | |
| 3292 | memmove(begin, p, end - p); |
| 3293 | memcpy(buf, prefix, strlen(prefix)); |
| 3294 | |
| 3295 | return 0; |
| 3296 | } |
| 3297 | |
| 3298 | /* |
| 3299 | * Block layer IOCTL handler. |
| 3300 | * |
| 3301 | * @dev Pointer to the block_device structure. |
| 3302 | * @mode ignored |
| 3303 | * @cmd IOCTL command passed from the user application. |
| 3304 | * @arg Argument passed from the user application. |
| 3305 | * |
| 3306 | * return value |
| 3307 | * 0 IOCTL completed successfully. |
| 3308 | * -ENOTTY IOCTL not supported or invalid driver data |
| 3309 | * structure pointer. |
| 3310 | */ |
| 3311 | static int mtip_block_ioctl(struct block_device *dev, |
| 3312 | fmode_t mode, |
| 3313 | unsigned cmd, |
| 3314 | unsigned long arg) |
| 3315 | { |
| 3316 | struct driver_data *dd = dev->bd_disk->private_data; |
| 3317 | |
| 3318 | if (!capable(CAP_SYS_ADMIN)) |
| 3319 | return -EACCES; |
| 3320 | |
| 3321 | if (!dd) |
| 3322 | return -ENOTTY; |
| 3323 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3324 | 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] | 3325 | return -ENOTTY; |
| 3326 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3327 | switch (cmd) { |
| 3328 | case BLKFLSBUF: |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 3329 | return -ENOTTY; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3330 | default: |
Jens Axboe | ef0f158 | 2011-09-27 21:19:53 -0600 | [diff] [blame] | 3331 | return mtip_hw_ioctl(dd, cmd, arg); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3332 | } |
| 3333 | } |
| 3334 | |
Jens Axboe | 16d02c0 | 2011-09-27 15:50:01 -0600 | [diff] [blame] | 3335 | #ifdef CONFIG_COMPAT |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3336 | /* |
| 3337 | * Block layer compat IOCTL handler. |
| 3338 | * |
| 3339 | * @dev Pointer to the block_device structure. |
| 3340 | * @mode ignored |
| 3341 | * @cmd IOCTL command passed from the user application. |
| 3342 | * @arg Argument passed from the user application. |
| 3343 | * |
| 3344 | * return value |
| 3345 | * 0 IOCTL completed successfully. |
| 3346 | * -ENOTTY IOCTL not supported or invalid driver data |
| 3347 | * structure pointer. |
| 3348 | */ |
| 3349 | static int mtip_block_compat_ioctl(struct block_device *dev, |
| 3350 | fmode_t mode, |
| 3351 | unsigned cmd, |
| 3352 | unsigned long arg) |
| 3353 | { |
| 3354 | struct driver_data *dd = dev->bd_disk->private_data; |
| 3355 | |
| 3356 | if (!capable(CAP_SYS_ADMIN)) |
| 3357 | return -EACCES; |
| 3358 | |
| 3359 | if (!dd) |
| 3360 | return -ENOTTY; |
| 3361 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3362 | 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] | 3363 | return -ENOTTY; |
| 3364 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3365 | switch (cmd) { |
| 3366 | case BLKFLSBUF: |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 3367 | return -ENOTTY; |
Jens Axboe | ef0f158 | 2011-09-27 21:19:53 -0600 | [diff] [blame] | 3368 | case HDIO_DRIVE_TASKFILE: { |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 3369 | struct mtip_compat_ide_task_request_s __user *compat_req_task; |
Jens Axboe | ef0f158 | 2011-09-27 21:19:53 -0600 | [diff] [blame] | 3370 | ide_task_request_t req_task; |
| 3371 | int compat_tasksize, outtotal, ret; |
| 3372 | |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 3373 | compat_tasksize = |
| 3374 | sizeof(struct mtip_compat_ide_task_request_s); |
Jens Axboe | ef0f158 | 2011-09-27 21:19:53 -0600 | [diff] [blame] | 3375 | |
| 3376 | compat_req_task = |
| 3377 | (struct mtip_compat_ide_task_request_s __user *) arg; |
| 3378 | |
| 3379 | if (copy_from_user(&req_task, (void __user *) arg, |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 3380 | compat_tasksize - (2 * sizeof(compat_long_t)))) |
Jens Axboe | ef0f158 | 2011-09-27 21:19:53 -0600 | [diff] [blame] | 3381 | return -EFAULT; |
| 3382 | |
| 3383 | if (get_user(req_task.out_size, &compat_req_task->out_size)) |
| 3384 | return -EFAULT; |
| 3385 | |
| 3386 | if (get_user(req_task.in_size, &compat_req_task->in_size)) |
| 3387 | return -EFAULT; |
| 3388 | |
| 3389 | outtotal = sizeof(struct mtip_compat_ide_task_request_s); |
| 3390 | |
| 3391 | ret = exec_drive_taskfile(dd, (void __user *) arg, |
| 3392 | &req_task, outtotal); |
| 3393 | |
| 3394 | if (copy_to_user((void __user *) arg, &req_task, |
| 3395 | compat_tasksize - |
| 3396 | (2 * sizeof(compat_long_t)))) |
| 3397 | return -EFAULT; |
| 3398 | |
| 3399 | if (put_user(req_task.out_size, &compat_req_task->out_size)) |
| 3400 | return -EFAULT; |
| 3401 | |
| 3402 | if (put_user(req_task.in_size, &compat_req_task->in_size)) |
| 3403 | return -EFAULT; |
| 3404 | |
| 3405 | return ret; |
| 3406 | } |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3407 | default: |
Jens Axboe | ef0f158 | 2011-09-27 21:19:53 -0600 | [diff] [blame] | 3408 | return mtip_hw_ioctl(dd, cmd, arg); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3409 | } |
| 3410 | } |
Jens Axboe | 16d02c0 | 2011-09-27 15:50:01 -0600 | [diff] [blame] | 3411 | #endif |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3412 | |
| 3413 | /* |
| 3414 | * Obtain the geometry of the device. |
| 3415 | * |
| 3416 | * You may think that this function is obsolete, but some applications, |
| 3417 | * fdisk for example still used CHS values. This function describes the |
| 3418 | * device as having 224 heads and 56 sectors per cylinder. These values are |
| 3419 | * chosen so that each cylinder is aligned on a 4KB boundary. Since a |
| 3420 | * partition is described in terms of a start and end cylinder this means |
| 3421 | * that each partition is also 4KB aligned. Non-aligned partitions adversely |
| 3422 | * affects performance. |
| 3423 | * |
| 3424 | * @dev Pointer to the block_device strucutre. |
| 3425 | * @geo Pointer to a hd_geometry structure. |
| 3426 | * |
| 3427 | * return value |
| 3428 | * 0 Operation completed successfully. |
| 3429 | * -ENOTTY An error occurred while reading the drive capacity. |
| 3430 | */ |
| 3431 | static int mtip_block_getgeo(struct block_device *dev, |
| 3432 | struct hd_geometry *geo) |
| 3433 | { |
| 3434 | struct driver_data *dd = dev->bd_disk->private_data; |
| 3435 | sector_t capacity; |
| 3436 | |
| 3437 | if (!dd) |
| 3438 | return -ENOTTY; |
| 3439 | |
| 3440 | if (!(mtip_hw_get_capacity(dd, &capacity))) { |
| 3441 | dev_warn(&dd->pdev->dev, |
| 3442 | "Could not get drive capacity.\n"); |
| 3443 | return -ENOTTY; |
| 3444 | } |
| 3445 | |
| 3446 | geo->heads = 224; |
| 3447 | geo->sectors = 56; |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 3448 | sector_div(capacity, (geo->heads * geo->sectors)); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3449 | geo->cylinders = capacity; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3450 | return 0; |
| 3451 | } |
| 3452 | |
| 3453 | /* |
| 3454 | * Block device operation function. |
| 3455 | * |
| 3456 | * This structure contains pointers to the functions required by the block |
| 3457 | * layer. |
| 3458 | */ |
| 3459 | static const struct block_device_operations mtip_block_ops = { |
| 3460 | .ioctl = mtip_block_ioctl, |
Jens Axboe | 16d02c0 | 2011-09-27 15:50:01 -0600 | [diff] [blame] | 3461 | #ifdef CONFIG_COMPAT |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3462 | .compat_ioctl = mtip_block_compat_ioctl, |
Jens Axboe | 16d02c0 | 2011-09-27 15:50:01 -0600 | [diff] [blame] | 3463 | #endif |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3464 | .getgeo = mtip_block_getgeo, |
| 3465 | .owner = THIS_MODULE |
| 3466 | }; |
| 3467 | |
| 3468 | /* |
| 3469 | * Block layer make request function. |
| 3470 | * |
| 3471 | * This function is called by the kernel to process a BIO for |
| 3472 | * the P320 device. |
| 3473 | * |
| 3474 | * @queue Pointer to the request queue. Unused other than to obtain |
| 3475 | * the driver data structure. |
| 3476 | * @bio Pointer to the BIO. |
| 3477 | * |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3478 | */ |
Jens Axboe | a71f483 | 2011-11-05 08:36:21 +0100 | [diff] [blame] | 3479 | static void mtip_make_request(struct request_queue *queue, struct bio *bio) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3480 | { |
| 3481 | struct driver_data *dd = queue->queuedata; |
| 3482 | struct scatterlist *sg; |
| 3483 | struct bio_vec *bvec; |
| 3484 | int nents = 0; |
| 3485 | int tag = 0; |
| 3486 | |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 3487 | if (unlikely(dd->dd_flag & MTIP_DDF_STOP_IO)) { |
| 3488 | if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, |
| 3489 | &dd->dd_flag))) { |
| 3490 | bio_endio(bio, -ENXIO); |
| 3491 | return; |
| 3492 | } |
| 3493 | if (unlikely(test_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag))) { |
| 3494 | bio_endio(bio, -ENODATA); |
| 3495 | return; |
| 3496 | } |
| 3497 | if (unlikely(test_bit(MTIP_DDF_WRITE_PROTECT_BIT, |
| 3498 | &dd->dd_flag) && |
| 3499 | bio_data_dir(bio))) { |
| 3500 | bio_endio(bio, -ENODATA); |
| 3501 | return; |
| 3502 | } |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3503 | } |
| 3504 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3505 | if (unlikely(!bio_has_data(bio))) { |
| 3506 | blk_queue_flush(queue, 0); |
| 3507 | bio_endio(bio, 0); |
Jens Axboe | a71f483 | 2011-11-05 08:36:21 +0100 | [diff] [blame] | 3508 | return; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3509 | } |
| 3510 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3511 | sg = mtip_hw_get_scatterlist(dd, &tag); |
| 3512 | if (likely(sg != NULL)) { |
| 3513 | blk_queue_bounce(queue, &bio); |
| 3514 | |
| 3515 | if (unlikely((bio)->bi_vcnt > MTIP_MAX_SG)) { |
| 3516 | dev_warn(&dd->pdev->dev, |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3517 | "Maximum number of SGL entries exceeded\n"); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3518 | bio_io_error(bio); |
| 3519 | mtip_hw_release_scatterlist(dd, tag); |
Jens Axboe | a71f483 | 2011-11-05 08:36:21 +0100 | [diff] [blame] | 3520 | return; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3521 | } |
| 3522 | |
| 3523 | /* Create the scatter list for this bio. */ |
| 3524 | bio_for_each_segment(bvec, bio, nents) { |
| 3525 | sg_set_page(&sg[nents], |
| 3526 | bvec->bv_page, |
| 3527 | bvec->bv_len, |
| 3528 | bvec->bv_offset); |
| 3529 | } |
| 3530 | |
| 3531 | /* Issue the read/write. */ |
| 3532 | mtip_hw_submit_io(dd, |
| 3533 | bio->bi_sector, |
| 3534 | bio_sectors(bio), |
| 3535 | nents, |
| 3536 | tag, |
| 3537 | bio_endio, |
| 3538 | bio, |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3539 | bio_data_dir(bio)); |
Jens Axboe | a71f483 | 2011-11-05 08:36:21 +0100 | [diff] [blame] | 3540 | } else |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3541 | bio_io_error(bio); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3542 | } |
| 3543 | |
| 3544 | /* |
| 3545 | * Block layer initialization function. |
| 3546 | * |
| 3547 | * This function is called once by the PCI layer for each P320 |
| 3548 | * device that is connected to the system. |
| 3549 | * |
| 3550 | * @dd Pointer to the driver data structure. |
| 3551 | * |
| 3552 | * return value |
| 3553 | * 0 on success else an error code. |
| 3554 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 3555 | static int mtip_block_initialize(struct driver_data *dd) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3556 | { |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 3557 | int rv = 0, wait_for_rebuild = 0; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3558 | sector_t capacity; |
| 3559 | unsigned int index = 0; |
| 3560 | struct kobject *kobj; |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 3561 | unsigned char thd_name[16]; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3562 | |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 3563 | if (dd->disk) |
| 3564 | goto skip_create_disk; /* hw init done, before rebuild */ |
| 3565 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3566 | /* Initialize the protocol layer. */ |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 3567 | wait_for_rebuild = mtip_hw_init(dd); |
| 3568 | if (wait_for_rebuild < 0) { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3569 | dev_err(&dd->pdev->dev, |
| 3570 | "Protocol layer initialization failed\n"); |
| 3571 | rv = -EINVAL; |
| 3572 | goto protocol_init_error; |
| 3573 | } |
| 3574 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3575 | dd->disk = alloc_disk(MTIP_MAX_MINORS); |
| 3576 | if (dd->disk == NULL) { |
| 3577 | dev_err(&dd->pdev->dev, |
| 3578 | "Unable to allocate gendisk structure\n"); |
| 3579 | rv = -EINVAL; |
| 3580 | goto alloc_disk_error; |
| 3581 | } |
| 3582 | |
| 3583 | /* Generate the disk name, implemented same as in sd.c */ |
| 3584 | do { |
| 3585 | if (!ida_pre_get(&rssd_index_ida, GFP_KERNEL)) |
| 3586 | goto ida_get_error; |
| 3587 | |
| 3588 | spin_lock(&rssd_index_lock); |
| 3589 | rv = ida_get_new(&rssd_index_ida, &index); |
| 3590 | spin_unlock(&rssd_index_lock); |
| 3591 | } while (rv == -EAGAIN); |
| 3592 | |
| 3593 | if (rv) |
| 3594 | goto ida_get_error; |
| 3595 | |
| 3596 | rv = rssd_disk_name_format("rssd", |
| 3597 | index, |
| 3598 | dd->disk->disk_name, |
| 3599 | DISK_NAME_LEN); |
| 3600 | if (rv) |
| 3601 | goto disk_index_error; |
| 3602 | |
| 3603 | dd->disk->driverfs_dev = &dd->pdev->dev; |
| 3604 | dd->disk->major = dd->major; |
| 3605 | dd->disk->first_minor = dd->instance * MTIP_MAX_MINORS; |
| 3606 | dd->disk->fops = &mtip_block_ops; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3607 | dd->disk->private_data = dd; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3608 | dd->index = index; |
| 3609 | |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 3610 | /* |
| 3611 | * if rebuild pending, start the service thread, and delay the block |
| 3612 | * queue creation and add_disk() |
| 3613 | */ |
| 3614 | if (wait_for_rebuild == MTIP_FTL_REBUILD_MAGIC) |
| 3615 | goto start_service_thread; |
| 3616 | |
| 3617 | skip_create_disk: |
| 3618 | /* Allocate the request queue. */ |
| 3619 | dd->queue = blk_alloc_queue(GFP_KERNEL); |
| 3620 | if (dd->queue == NULL) { |
| 3621 | dev_err(&dd->pdev->dev, |
| 3622 | "Unable to allocate request queue\n"); |
| 3623 | rv = -ENOMEM; |
| 3624 | goto block_queue_alloc_init_error; |
| 3625 | } |
| 3626 | |
| 3627 | /* Attach our request function to the request queue. */ |
| 3628 | blk_queue_make_request(dd->queue, mtip_make_request); |
| 3629 | |
| 3630 | dd->disk->queue = dd->queue; |
| 3631 | dd->queue->queuedata = dd; |
| 3632 | |
| 3633 | /* Set device limits. */ |
| 3634 | set_bit(QUEUE_FLAG_NONROT, &dd->queue->queue_flags); |
| 3635 | blk_queue_max_segments(dd->queue, MTIP_MAX_SG); |
| 3636 | blk_queue_physical_block_size(dd->queue, 4096); |
| 3637 | blk_queue_io_min(dd->queue, 4096); |
Asai Thambi S P | 4e8670e | 2012-02-07 07:54:31 +0100 | [diff] [blame] | 3638 | /* |
| 3639 | * write back cache is not supported in the device. FUA depends on |
| 3640 | * write back cache support, hence setting flush support to zero. |
| 3641 | */ |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 3642 | blk_queue_flush(dd->queue, 0); |
| 3643 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3644 | /* Set the capacity of the device in 512 byte sectors. */ |
| 3645 | if (!(mtip_hw_get_capacity(dd, &capacity))) { |
| 3646 | dev_warn(&dd->pdev->dev, |
| 3647 | "Could not read drive capacity\n"); |
| 3648 | rv = -EIO; |
| 3649 | goto read_capacity_error; |
| 3650 | } |
| 3651 | set_capacity(dd->disk, capacity); |
| 3652 | |
| 3653 | /* Enable the block device and add it to /dev */ |
| 3654 | add_disk(dd->disk); |
| 3655 | |
| 3656 | /* |
| 3657 | * Now that the disk is active, initialize any sysfs attributes |
| 3658 | * managed by the protocol layer. |
| 3659 | */ |
| 3660 | kobj = kobject_get(&disk_to_dev(dd->disk)->kobj); |
| 3661 | if (kobj) { |
| 3662 | mtip_hw_sysfs_init(dd, kobj); |
| 3663 | kobject_put(kobj); |
| 3664 | } |
| 3665 | |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3666 | if (dd->mtip_svc_handler) { |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3667 | set_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag); |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 3668 | return rv; /* service thread created for handling rebuild */ |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3669 | } |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 3670 | |
| 3671 | start_service_thread: |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 3672 | sprintf(thd_name, "mtip_svc_thd_%02d", index); |
| 3673 | |
| 3674 | dd->mtip_svc_handler = kthread_run(mtip_service_thread, |
| 3675 | dd, thd_name); |
| 3676 | |
| 3677 | if (IS_ERR(dd->mtip_svc_handler)) { |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 3678 | 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] | 3679 | dd->mtip_svc_handler = NULL; |
| 3680 | rv = -EFAULT; |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 3681 | goto kthread_run_error; |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 3682 | } |
| 3683 | |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3684 | if (wait_for_rebuild == MTIP_FTL_REBUILD_MAGIC) |
| 3685 | rv = wait_for_rebuild; |
| 3686 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3687 | return rv; |
| 3688 | |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 3689 | kthread_run_error: |
| 3690 | /* Delete our gendisk. This also removes the device from /dev */ |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3691 | del_gendisk(dd->disk); |
| 3692 | |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 3693 | read_capacity_error: |
| 3694 | blk_cleanup_queue(dd->queue); |
| 3695 | |
| 3696 | block_queue_alloc_init_error: |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3697 | disk_index_error: |
| 3698 | spin_lock(&rssd_index_lock); |
| 3699 | ida_remove(&rssd_index_ida, index); |
| 3700 | spin_unlock(&rssd_index_lock); |
| 3701 | |
| 3702 | ida_get_error: |
| 3703 | put_disk(dd->disk); |
| 3704 | |
| 3705 | alloc_disk_error: |
Asai Thambi S P | 62ee8c1 | 2012-01-04 22:01:32 +0100 | [diff] [blame] | 3706 | mtip_hw_exit(dd); /* De-initialize the protocol layer. */ |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3707 | |
| 3708 | protocol_init_error: |
| 3709 | return rv; |
| 3710 | } |
| 3711 | |
| 3712 | /* |
| 3713 | * Block layer deinitialization function. |
| 3714 | * |
| 3715 | * Called by the PCI layer as each P320 device is removed. |
| 3716 | * |
| 3717 | * @dd Pointer to the driver data structure. |
| 3718 | * |
| 3719 | * return value |
| 3720 | * 0 |
| 3721 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 3722 | static int mtip_block_remove(struct driver_data *dd) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3723 | { |
| 3724 | struct kobject *kobj; |
Asai Thambi S P | 60ec0ee | 2011-11-23 08:29:24 +0100 | [diff] [blame] | 3725 | |
| 3726 | if (dd->mtip_svc_handler) { |
Asai Thambi S P | c74b0f5 | 2012-04-09 08:35:39 +0200 | [diff] [blame] | 3727 | 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] | 3728 | wake_up_interruptible(&dd->port->svc_wait); |
| 3729 | kthread_stop(dd->mtip_svc_handler); |
| 3730 | } |
| 3731 | |
Asai Thambi S P | f658721 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3732 | /* Clean up the sysfs attributes, if created */ |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3733 | 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] | 3734 | kobj = kobject_get(&disk_to_dev(dd->disk)->kobj); |
| 3735 | if (kobj) { |
| 3736 | mtip_hw_sysfs_exit(dd, kobj); |
| 3737 | kobject_put(kobj); |
| 3738 | } |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3739 | } |
| 3740 | |
| 3741 | /* |
| 3742 | * Delete our gendisk structure. This also removes the device |
| 3743 | * from /dev |
| 3744 | */ |
| 3745 | del_gendisk(dd->disk); |
Asai Thambi S P | 8182b49 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3746 | |
| 3747 | spin_lock(&rssd_index_lock); |
| 3748 | ida_remove(&rssd_index_ida, dd->index); |
| 3749 | spin_unlock(&rssd_index_lock); |
| 3750 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3751 | blk_cleanup_queue(dd->queue); |
| 3752 | dd->disk = NULL; |
| 3753 | dd->queue = NULL; |
| 3754 | |
| 3755 | /* De-initialize the protocol layer. */ |
| 3756 | mtip_hw_exit(dd); |
| 3757 | |
| 3758 | return 0; |
| 3759 | } |
| 3760 | |
| 3761 | /* |
| 3762 | * Function called by the PCI layer when just before the |
| 3763 | * machine shuts down. |
| 3764 | * |
| 3765 | * If a protocol layer shutdown function is present it will be called |
| 3766 | * by this function. |
| 3767 | * |
| 3768 | * @dd Pointer to the driver data structure. |
| 3769 | * |
| 3770 | * return value |
| 3771 | * 0 |
| 3772 | */ |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 3773 | static int mtip_block_shutdown(struct driver_data *dd) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3774 | { |
| 3775 | dev_info(&dd->pdev->dev, |
| 3776 | "Shutting down %s ...\n", dd->disk->disk_name); |
| 3777 | |
| 3778 | /* Delete our gendisk structure, and cleanup the blk queue. */ |
| 3779 | del_gendisk(dd->disk); |
Asai Thambi S P | 8182b49 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3780 | |
| 3781 | spin_lock(&rssd_index_lock); |
| 3782 | ida_remove(&rssd_index_ida, dd->index); |
| 3783 | spin_unlock(&rssd_index_lock); |
| 3784 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3785 | blk_cleanup_queue(dd->queue); |
| 3786 | dd->disk = NULL; |
| 3787 | dd->queue = NULL; |
| 3788 | |
| 3789 | mtip_hw_shutdown(dd); |
| 3790 | return 0; |
| 3791 | } |
| 3792 | |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 3793 | static int mtip_block_suspend(struct driver_data *dd) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3794 | { |
| 3795 | dev_info(&dd->pdev->dev, |
| 3796 | "Suspending %s ...\n", dd->disk->disk_name); |
| 3797 | mtip_hw_suspend(dd); |
| 3798 | return 0; |
| 3799 | } |
| 3800 | |
Jens Axboe | 6316668 | 2011-09-27 21:27:43 -0600 | [diff] [blame] | 3801 | static int mtip_block_resume(struct driver_data *dd) |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3802 | { |
| 3803 | dev_info(&dd->pdev->dev, "Resuming %s ...\n", |
| 3804 | dd->disk->disk_name); |
| 3805 | mtip_hw_resume(dd); |
| 3806 | return 0; |
| 3807 | } |
| 3808 | |
| 3809 | /* |
| 3810 | * Called for each supported PCI device detected. |
| 3811 | * |
| 3812 | * This function allocates the private data structure, enables the |
| 3813 | * PCI device and then calls the block layer initialization function. |
| 3814 | * |
| 3815 | * return value |
| 3816 | * 0 on success else an error code. |
| 3817 | */ |
| 3818 | static int mtip_pci_probe(struct pci_dev *pdev, |
| 3819 | const struct pci_device_id *ent) |
| 3820 | { |
| 3821 | int rv = 0; |
| 3822 | struct driver_data *dd = NULL; |
| 3823 | |
| 3824 | /* Allocate memory for this devices private data. */ |
| 3825 | dd = kzalloc(sizeof(struct driver_data), GFP_KERNEL); |
| 3826 | if (dd == NULL) { |
| 3827 | dev_err(&pdev->dev, |
| 3828 | "Unable to allocate memory for driver data\n"); |
| 3829 | return -ENOMEM; |
| 3830 | } |
| 3831 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3832 | /* Attach the private data to this PCI device. */ |
| 3833 | pci_set_drvdata(pdev, dd); |
| 3834 | |
| 3835 | rv = pcim_enable_device(pdev); |
| 3836 | if (rv < 0) { |
| 3837 | dev_err(&pdev->dev, "Unable to enable device\n"); |
| 3838 | goto iomap_err; |
| 3839 | } |
| 3840 | |
| 3841 | /* Map BAR5 to memory. */ |
| 3842 | rv = pcim_iomap_regions(pdev, 1 << MTIP_ABAR, MTIP_DRV_NAME); |
| 3843 | if (rv < 0) { |
| 3844 | dev_err(&pdev->dev, "Unable to map regions\n"); |
| 3845 | goto iomap_err; |
| 3846 | } |
| 3847 | |
| 3848 | if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) { |
| 3849 | rv = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); |
| 3850 | |
| 3851 | if (rv) { |
| 3852 | rv = pci_set_consistent_dma_mask(pdev, |
| 3853 | DMA_BIT_MASK(32)); |
| 3854 | if (rv) { |
| 3855 | dev_warn(&pdev->dev, |
| 3856 | "64-bit DMA enable failed\n"); |
| 3857 | goto setmask_err; |
| 3858 | } |
| 3859 | } |
| 3860 | } |
| 3861 | |
| 3862 | pci_set_master(pdev); |
| 3863 | |
| 3864 | if (pci_enable_msi(pdev)) { |
| 3865 | dev_warn(&pdev->dev, |
| 3866 | "Unable to enable MSI interrupt.\n"); |
| 3867 | goto block_initialize_err; |
| 3868 | } |
| 3869 | |
| 3870 | /* Copy the info we may need later into the private data structure. */ |
| 3871 | dd->major = mtip_major; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3872 | dd->instance = instance; |
| 3873 | dd->pdev = pdev; |
| 3874 | |
| 3875 | /* Initialize the block layer. */ |
| 3876 | rv = mtip_block_initialize(dd); |
| 3877 | if (rv < 0) { |
| 3878 | dev_err(&pdev->dev, |
| 3879 | "Unable to initialize block layer\n"); |
| 3880 | goto block_initialize_err; |
| 3881 | } |
| 3882 | |
| 3883 | /* |
| 3884 | * Increment the instance count so that each device has a unique |
| 3885 | * instance number. |
| 3886 | */ |
| 3887 | instance++; |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3888 | if (rv != MTIP_FTL_REBUILD_MAGIC) |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3889 | set_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3890 | goto done; |
| 3891 | |
| 3892 | block_initialize_err: |
| 3893 | pci_disable_msi(pdev); |
| 3894 | |
| 3895 | setmask_err: |
| 3896 | pcim_iounmap_regions(pdev, 1 << MTIP_ABAR); |
| 3897 | |
| 3898 | iomap_err: |
| 3899 | kfree(dd); |
| 3900 | pci_set_drvdata(pdev, NULL); |
| 3901 | return rv; |
| 3902 | done: |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3903 | return rv; |
| 3904 | } |
| 3905 | |
| 3906 | /* |
| 3907 | * Called for each probed device when the device is removed or the |
| 3908 | * driver is unloaded. |
| 3909 | * |
| 3910 | * return value |
| 3911 | * None |
| 3912 | */ |
| 3913 | static void mtip_pci_remove(struct pci_dev *pdev) |
| 3914 | { |
| 3915 | struct driver_data *dd = pci_get_drvdata(pdev); |
| 3916 | int counter = 0; |
| 3917 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3918 | set_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag); |
Asai Thambi S P | 4503836 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3919 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3920 | if (mtip_check_surprise_removal(pdev)) { |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3921 | while (!test_bit(MTIP_DDF_CLEANUP_BIT, &dd->dd_flag)) { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3922 | counter++; |
| 3923 | msleep(20); |
| 3924 | if (counter == 10) { |
| 3925 | /* Cleanup the outstanding commands */ |
| 3926 | mtip_command_cleanup(dd); |
| 3927 | break; |
| 3928 | } |
| 3929 | } |
| 3930 | } |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3931 | |
| 3932 | /* Clean up the block layer. */ |
| 3933 | mtip_block_remove(dd); |
| 3934 | |
| 3935 | pci_disable_msi(pdev); |
| 3936 | |
| 3937 | kfree(dd); |
| 3938 | pcim_iounmap_regions(pdev, 1 << MTIP_ABAR); |
| 3939 | } |
| 3940 | |
| 3941 | /* |
| 3942 | * Called for each probed device when the device is suspended. |
| 3943 | * |
| 3944 | * return value |
| 3945 | * 0 Success |
| 3946 | * <0 Error |
| 3947 | */ |
| 3948 | static int mtip_pci_suspend(struct pci_dev *pdev, pm_message_t mesg) |
| 3949 | { |
| 3950 | int rv = 0; |
| 3951 | struct driver_data *dd = pci_get_drvdata(pdev); |
| 3952 | |
| 3953 | if (!dd) { |
| 3954 | dev_err(&pdev->dev, |
| 3955 | "Driver private datastructure is NULL\n"); |
| 3956 | return -EFAULT; |
| 3957 | } |
| 3958 | |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 3959 | set_bit(MTIP_DDF_RESUME_BIT, &dd->dd_flag); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 3960 | |
| 3961 | /* Disable ports & interrupts then send standby immediate */ |
| 3962 | rv = mtip_block_suspend(dd); |
| 3963 | if (rv < 0) { |
| 3964 | dev_err(&pdev->dev, |
| 3965 | "Failed to suspend controller\n"); |
| 3966 | return rv; |
| 3967 | } |
| 3968 | |
| 3969 | /* |
| 3970 | * Save the pci config space to pdev structure & |
| 3971 | * disable the device |
| 3972 | */ |
| 3973 | pci_save_state(pdev); |
| 3974 | pci_disable_device(pdev); |
| 3975 | |
| 3976 | /* Move to Low power state*/ |
| 3977 | pci_set_power_state(pdev, PCI_D3hot); |
| 3978 | |
| 3979 | return rv; |
| 3980 | } |
| 3981 | |
| 3982 | /* |
| 3983 | * Called for each probed device when the device is resumed. |
| 3984 | * |
| 3985 | * return value |
| 3986 | * 0 Success |
| 3987 | * <0 Error |
| 3988 | */ |
| 3989 | static int mtip_pci_resume(struct pci_dev *pdev) |
| 3990 | { |
| 3991 | int rv = 0; |
| 3992 | struct driver_data *dd; |
| 3993 | |
| 3994 | dd = pci_get_drvdata(pdev); |
| 3995 | if (!dd) { |
| 3996 | dev_err(&pdev->dev, |
| 3997 | "Driver private datastructure is NULL\n"); |
| 3998 | return -EFAULT; |
| 3999 | } |
| 4000 | |
| 4001 | /* Move the device to active State */ |
| 4002 | pci_set_power_state(pdev, PCI_D0); |
| 4003 | |
| 4004 | /* Restore PCI configuration space */ |
| 4005 | pci_restore_state(pdev); |
| 4006 | |
| 4007 | /* Enable the PCI device*/ |
| 4008 | rv = pcim_enable_device(pdev); |
| 4009 | if (rv < 0) { |
| 4010 | dev_err(&pdev->dev, |
| 4011 | "Failed to enable card during resume\n"); |
| 4012 | goto err; |
| 4013 | } |
| 4014 | pci_set_master(pdev); |
| 4015 | |
| 4016 | /* |
| 4017 | * Calls hbaReset, initPort, & startPort function |
| 4018 | * then enables interrupts |
| 4019 | */ |
| 4020 | rv = mtip_block_resume(dd); |
| 4021 | if (rv < 0) |
| 4022 | dev_err(&pdev->dev, "Unable to resume\n"); |
| 4023 | |
| 4024 | err: |
Asai Thambi S P | 8a857a8 | 2012-04-09 08:35:38 +0200 | [diff] [blame] | 4025 | clear_bit(MTIP_DDF_RESUME_BIT, &dd->dd_flag); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 4026 | |
| 4027 | return rv; |
| 4028 | } |
| 4029 | |
| 4030 | /* |
| 4031 | * Shutdown routine |
| 4032 | * |
| 4033 | * return value |
| 4034 | * None |
| 4035 | */ |
| 4036 | static void mtip_pci_shutdown(struct pci_dev *pdev) |
| 4037 | { |
| 4038 | struct driver_data *dd = pci_get_drvdata(pdev); |
| 4039 | if (dd) |
| 4040 | mtip_block_shutdown(dd); |
| 4041 | } |
| 4042 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 4043 | /* Table of device ids supported by this driver. */ |
| 4044 | static DEFINE_PCI_DEVICE_TABLE(mtip_pci_tbl) = { |
| 4045 | { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P320_DEVICE_ID) }, |
| 4046 | { 0 } |
| 4047 | }; |
| 4048 | |
| 4049 | /* Structure that describes the PCI driver functions. */ |
Jens Axboe | 3ff147d | 2011-09-27 21:33:53 -0600 | [diff] [blame] | 4050 | static struct pci_driver mtip_pci_driver = { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 4051 | .name = MTIP_DRV_NAME, |
| 4052 | .id_table = mtip_pci_tbl, |
| 4053 | .probe = mtip_pci_probe, |
| 4054 | .remove = mtip_pci_remove, |
| 4055 | .suspend = mtip_pci_suspend, |
| 4056 | .resume = mtip_pci_resume, |
| 4057 | .shutdown = mtip_pci_shutdown, |
| 4058 | }; |
| 4059 | |
| 4060 | MODULE_DEVICE_TABLE(pci, mtip_pci_tbl); |
| 4061 | |
| 4062 | /* |
| 4063 | * Module initialization function. |
| 4064 | * |
| 4065 | * Called once when the module is loaded. This function allocates a major |
| 4066 | * block device number to the Cyclone devices and registers the PCI layer |
| 4067 | * of the driver. |
| 4068 | * |
| 4069 | * Return value |
| 4070 | * 0 on success else error code. |
| 4071 | */ |
| 4072 | static int __init mtip_init(void) |
| 4073 | { |
Ryosuke Saito | 6d27f09 | 2012-04-05 08:09:34 -0600 | [diff] [blame] | 4074 | int error; |
| 4075 | |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 4076 | printk(KERN_INFO MTIP_DRV_NAME " Version " MTIP_DRV_VERSION "\n"); |
| 4077 | |
| 4078 | /* Allocate a major block device number to use with this driver. */ |
Ryosuke Saito | 6d27f09 | 2012-04-05 08:09:34 -0600 | [diff] [blame] | 4079 | error = register_blkdev(0, MTIP_DRV_NAME); |
| 4080 | if (error <= 0) { |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 4081 | printk(KERN_ERR "Unable to register block device (%d)\n", |
Ryosuke Saito | 6d27f09 | 2012-04-05 08:09:34 -0600 | [diff] [blame] | 4082 | error); |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 4083 | return -EBUSY; |
| 4084 | } |
Ryosuke Saito | 6d27f09 | 2012-04-05 08:09:34 -0600 | [diff] [blame] | 4085 | mtip_major = error; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 4086 | |
| 4087 | /* Register our PCI operations. */ |
Ryosuke Saito | 6d27f09 | 2012-04-05 08:09:34 -0600 | [diff] [blame] | 4088 | error = pci_register_driver(&mtip_pci_driver); |
| 4089 | if (error) |
| 4090 | unregister_blkdev(mtip_major, MTIP_DRV_NAME); |
| 4091 | |
| 4092 | return error; |
Sam Bradshaw | 88523a6 | 2011-08-30 08:34:26 -0600 | [diff] [blame] | 4093 | } |
| 4094 | |
| 4095 | /* |
| 4096 | * Module de-initialization function. |
| 4097 | * |
| 4098 | * Called once when the module is unloaded. This function deallocates |
| 4099 | * the major block device number allocated by mtip_init() and |
| 4100 | * unregisters the PCI layer of the driver. |
| 4101 | * |
| 4102 | * Return value |
| 4103 | * none |
| 4104 | */ |
| 4105 | static void __exit mtip_exit(void) |
| 4106 | { |
| 4107 | /* Release the allocated major block device number. */ |
| 4108 | unregister_blkdev(mtip_major, MTIP_DRV_NAME); |
| 4109 | |
| 4110 | /* Unregister the PCI driver. */ |
| 4111 | pci_unregister_driver(&mtip_pci_driver); |
| 4112 | } |
| 4113 | |
| 4114 | MODULE_AUTHOR("Micron Technology, Inc"); |
| 4115 | MODULE_DESCRIPTION("Micron RealSSD PCIe Block Driver"); |
| 4116 | MODULE_LICENSE("GPL"); |
| 4117 | MODULE_VERSION(MTIP_DRV_VERSION); |
| 4118 | |
| 4119 | module_init(mtip_init); |
| 4120 | module_exit(mtip_exit); |