Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * Linux MegaRAID driver for SAS based RAID controllers |
| 4 | * |
| 5 | * Copyright (c) 2003-2005 LSI Logic Corporation. |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License |
| 9 | * as published by the Free Software Foundation; either version |
| 10 | * 2 of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * FILE : megaraid_sas.c |
Sumant Patro | 2a3681e | 2006-10-03 13:19:21 -0700 | [diff] [blame^] | 13 | * Version : v00.00.03.05 |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 14 | * |
| 15 | * Authors: |
| 16 | * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsil.com> |
| 17 | * Sumant Patro <Sumant.Patro@lsil.com> |
| 18 | * |
| 19 | * List of supported controllers |
| 20 | * |
| 21 | * OEM Product Name VID DID SSVID SSID |
| 22 | * --- ------------ --- --- ---- ---- |
| 23 | */ |
| 24 | |
| 25 | #include <linux/kernel.h> |
| 26 | #include <linux/types.h> |
| 27 | #include <linux/pci.h> |
| 28 | #include <linux/list.h> |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 29 | #include <linux/moduleparam.h> |
| 30 | #include <linux/module.h> |
| 31 | #include <linux/spinlock.h> |
| 32 | #include <linux/interrupt.h> |
| 33 | #include <linux/delay.h> |
| 34 | #include <linux/uio.h> |
| 35 | #include <asm/uaccess.h> |
Al Viro | 4339923 | 2005-10-04 17:36:04 +0100 | [diff] [blame] | 36 | #include <linux/fs.h> |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 37 | #include <linux/compat.h> |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 38 | #include <linux/mutex.h> |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 39 | |
| 40 | #include <scsi/scsi.h> |
| 41 | #include <scsi/scsi_cmnd.h> |
| 42 | #include <scsi/scsi_device.h> |
| 43 | #include <scsi/scsi_host.h> |
| 44 | #include "megaraid_sas.h" |
| 45 | |
| 46 | MODULE_LICENSE("GPL"); |
| 47 | MODULE_VERSION(MEGASAS_VERSION); |
| 48 | MODULE_AUTHOR("sreenivas.bagalkote@lsil.com"); |
| 49 | MODULE_DESCRIPTION("LSI Logic MegaRAID SAS Driver"); |
| 50 | |
| 51 | /* |
| 52 | * PCI ID table for all supported controllers |
| 53 | */ |
| 54 | static struct pci_device_id megasas_pci_table[] = { |
| 55 | |
Henrik Kretzschmar | f3d7271 | 2006-08-15 11:17:21 +0200 | [diff] [blame] | 56 | {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1064R)}, |
| 57 | /* xscale IOP */ |
| 58 | {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078R)}, |
| 59 | /* ppc IOP */ |
| 60 | {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_VERDE_ZCR)}, |
| 61 | /* xscale IOP, vega */ |
| 62 | {PCI_DEVICE(PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_DELL_PERC5)}, |
| 63 | /* xscale IOP */ |
| 64 | {} |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 65 | }; |
| 66 | |
| 67 | MODULE_DEVICE_TABLE(pci, megasas_pci_table); |
| 68 | |
| 69 | static int megasas_mgmt_majorno; |
| 70 | static struct megasas_mgmt_info megasas_mgmt_info; |
| 71 | static struct fasync_struct *megasas_async_queue; |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 72 | static DEFINE_MUTEX(megasas_async_queue_mutex); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 73 | |
Sumant Patro | 658dced | 2006-10-03 13:09:14 -0700 | [diff] [blame] | 74 | static u32 megasas_dbg_lvl; |
| 75 | |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 76 | /** |
| 77 | * megasas_get_cmd - Get a command from the free pool |
| 78 | * @instance: Adapter soft state |
| 79 | * |
| 80 | * Returns a free command from the pool |
| 81 | */ |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 82 | static struct megasas_cmd *megasas_get_cmd(struct megasas_instance |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 83 | *instance) |
| 84 | { |
| 85 | unsigned long flags; |
| 86 | struct megasas_cmd *cmd = NULL; |
| 87 | |
| 88 | spin_lock_irqsave(&instance->cmd_pool_lock, flags); |
| 89 | |
| 90 | if (!list_empty(&instance->cmd_pool)) { |
| 91 | cmd = list_entry((&instance->cmd_pool)->next, |
| 92 | struct megasas_cmd, list); |
| 93 | list_del_init(&cmd->list); |
| 94 | } else { |
| 95 | printk(KERN_ERR "megasas: Command pool empty!\n"); |
| 96 | } |
| 97 | |
| 98 | spin_unlock_irqrestore(&instance->cmd_pool_lock, flags); |
| 99 | return cmd; |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * megasas_return_cmd - Return a cmd to free command pool |
| 104 | * @instance: Adapter soft state |
| 105 | * @cmd: Command packet to be returned to free command pool |
| 106 | */ |
| 107 | static inline void |
| 108 | megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd) |
| 109 | { |
| 110 | unsigned long flags; |
| 111 | |
| 112 | spin_lock_irqsave(&instance->cmd_pool_lock, flags); |
| 113 | |
| 114 | cmd->scmd = NULL; |
| 115 | list_add_tail(&cmd->list, &instance->cmd_pool); |
| 116 | |
| 117 | spin_unlock_irqrestore(&instance->cmd_pool_lock, flags); |
| 118 | } |
| 119 | |
Sumant Patro | 1341c93 | 2006-01-25 12:02:40 -0800 | [diff] [blame] | 120 | |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 121 | /** |
Sumant Patro | 1341c93 | 2006-01-25 12:02:40 -0800 | [diff] [blame] | 122 | * The following functions are defined for xscale |
| 123 | * (deviceid : 1064R, PERC5) controllers |
| 124 | */ |
| 125 | |
| 126 | /** |
| 127 | * megasas_enable_intr_xscale - Enables interrupts |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 128 | * @regs: MFI register set |
| 129 | */ |
| 130 | static inline void |
Sumant Patro | 1341c93 | 2006-01-25 12:02:40 -0800 | [diff] [blame] | 131 | megasas_enable_intr_xscale(struct megasas_register_set __iomem * regs) |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 132 | { |
| 133 | writel(1, &(regs)->outbound_intr_mask); |
| 134 | |
| 135 | /* Dummy readl to force pci flush */ |
| 136 | readl(®s->outbound_intr_mask); |
| 137 | } |
| 138 | |
| 139 | /** |
Sumant Patro | b274cab | 2006-10-03 12:52:12 -0700 | [diff] [blame] | 140 | * megasas_disable_intr_xscale -Disables interrupt |
| 141 | * @regs: MFI register set |
| 142 | */ |
| 143 | static inline void |
| 144 | megasas_disable_intr_xscale(struct megasas_register_set __iomem * regs) |
| 145 | { |
| 146 | u32 mask = 0x1f; |
| 147 | writel(mask, ®s->outbound_intr_mask); |
| 148 | /* Dummy readl to force pci flush */ |
| 149 | readl(®s->outbound_intr_mask); |
| 150 | } |
| 151 | |
| 152 | /** |
Sumant Patro | 1341c93 | 2006-01-25 12:02:40 -0800 | [diff] [blame] | 153 | * megasas_read_fw_status_reg_xscale - returns the current FW status value |
| 154 | * @regs: MFI register set |
| 155 | */ |
| 156 | static u32 |
| 157 | megasas_read_fw_status_reg_xscale(struct megasas_register_set __iomem * regs) |
| 158 | { |
| 159 | return readl(&(regs)->outbound_msg_0); |
| 160 | } |
| 161 | /** |
| 162 | * megasas_clear_interrupt_xscale - Check & clear interrupt |
| 163 | * @regs: MFI register set |
| 164 | */ |
| 165 | static int |
| 166 | megasas_clear_intr_xscale(struct megasas_register_set __iomem * regs) |
| 167 | { |
| 168 | u32 status; |
| 169 | /* |
| 170 | * Check if it is our interrupt |
| 171 | */ |
| 172 | status = readl(®s->outbound_intr_status); |
| 173 | |
| 174 | if (!(status & MFI_OB_INTR_STATUS_MASK)) { |
| 175 | return 1; |
| 176 | } |
| 177 | |
| 178 | /* |
| 179 | * Clear the interrupt by writing back the same value |
| 180 | */ |
| 181 | writel(status, ®s->outbound_intr_status); |
| 182 | |
| 183 | return 0; |
| 184 | } |
| 185 | |
| 186 | /** |
| 187 | * megasas_fire_cmd_xscale - Sends command to the FW |
| 188 | * @frame_phys_addr : Physical address of cmd |
| 189 | * @frame_count : Number of frames for the command |
| 190 | * @regs : MFI register set |
| 191 | */ |
| 192 | static inline void |
| 193 | megasas_fire_cmd_xscale(dma_addr_t frame_phys_addr,u32 frame_count, struct megasas_register_set __iomem *regs) |
| 194 | { |
| 195 | writel((frame_phys_addr >> 3)|(frame_count), |
| 196 | &(regs)->inbound_queue_port); |
| 197 | } |
| 198 | |
| 199 | static struct megasas_instance_template megasas_instance_template_xscale = { |
| 200 | |
| 201 | .fire_cmd = megasas_fire_cmd_xscale, |
| 202 | .enable_intr = megasas_enable_intr_xscale, |
Sumant Patro | b274cab | 2006-10-03 12:52:12 -0700 | [diff] [blame] | 203 | .disable_intr = megasas_disable_intr_xscale, |
Sumant Patro | 1341c93 | 2006-01-25 12:02:40 -0800 | [diff] [blame] | 204 | .clear_intr = megasas_clear_intr_xscale, |
| 205 | .read_fw_status_reg = megasas_read_fw_status_reg_xscale, |
| 206 | }; |
| 207 | |
| 208 | /** |
| 209 | * This is the end of set of functions & definitions specific |
| 210 | * to xscale (deviceid : 1064R, PERC5) controllers |
| 211 | */ |
| 212 | |
| 213 | /** |
Sumant Patro | f9876f0 | 2006-02-03 15:34:35 -0800 | [diff] [blame] | 214 | * The following functions are defined for ppc (deviceid : 0x60) |
| 215 | * controllers |
| 216 | */ |
| 217 | |
| 218 | /** |
| 219 | * megasas_enable_intr_ppc - Enables interrupts |
| 220 | * @regs: MFI register set |
| 221 | */ |
| 222 | static inline void |
| 223 | megasas_enable_intr_ppc(struct megasas_register_set __iomem * regs) |
| 224 | { |
| 225 | writel(0xFFFFFFFF, &(regs)->outbound_doorbell_clear); |
| 226 | |
| 227 | writel(~0x80000004, &(regs)->outbound_intr_mask); |
| 228 | |
| 229 | /* Dummy readl to force pci flush */ |
| 230 | readl(®s->outbound_intr_mask); |
| 231 | } |
| 232 | |
| 233 | /** |
Sumant Patro | b274cab | 2006-10-03 12:52:12 -0700 | [diff] [blame] | 234 | * megasas_disable_intr_ppc - Disable interrupt |
| 235 | * @regs: MFI register set |
| 236 | */ |
| 237 | static inline void |
| 238 | megasas_disable_intr_ppc(struct megasas_register_set __iomem * regs) |
| 239 | { |
| 240 | u32 mask = 0xFFFFFFFF; |
| 241 | writel(mask, ®s->outbound_intr_mask); |
| 242 | /* Dummy readl to force pci flush */ |
| 243 | readl(®s->outbound_intr_mask); |
| 244 | } |
| 245 | |
| 246 | /** |
Sumant Patro | f9876f0 | 2006-02-03 15:34:35 -0800 | [diff] [blame] | 247 | * megasas_read_fw_status_reg_ppc - returns the current FW status value |
| 248 | * @regs: MFI register set |
| 249 | */ |
| 250 | static u32 |
| 251 | megasas_read_fw_status_reg_ppc(struct megasas_register_set __iomem * regs) |
| 252 | { |
| 253 | return readl(&(regs)->outbound_scratch_pad); |
| 254 | } |
| 255 | |
| 256 | /** |
| 257 | * megasas_clear_interrupt_ppc - Check & clear interrupt |
| 258 | * @regs: MFI register set |
| 259 | */ |
| 260 | static int |
| 261 | megasas_clear_intr_ppc(struct megasas_register_set __iomem * regs) |
| 262 | { |
| 263 | u32 status; |
| 264 | /* |
| 265 | * Check if it is our interrupt |
| 266 | */ |
| 267 | status = readl(®s->outbound_intr_status); |
| 268 | |
| 269 | if (!(status & MFI_REPLY_1078_MESSAGE_INTERRUPT)) { |
| 270 | return 1; |
| 271 | } |
| 272 | |
| 273 | /* |
| 274 | * Clear the interrupt by writing back the same value |
| 275 | */ |
| 276 | writel(status, ®s->outbound_doorbell_clear); |
| 277 | |
| 278 | return 0; |
| 279 | } |
| 280 | /** |
| 281 | * megasas_fire_cmd_ppc - Sends command to the FW |
| 282 | * @frame_phys_addr : Physical address of cmd |
| 283 | * @frame_count : Number of frames for the command |
| 284 | * @regs : MFI register set |
| 285 | */ |
| 286 | static inline void |
| 287 | megasas_fire_cmd_ppc(dma_addr_t frame_phys_addr, u32 frame_count, struct megasas_register_set __iomem *regs) |
| 288 | { |
| 289 | writel((frame_phys_addr | (frame_count<<1))|1, |
| 290 | &(regs)->inbound_queue_port); |
| 291 | } |
| 292 | |
| 293 | static struct megasas_instance_template megasas_instance_template_ppc = { |
| 294 | |
| 295 | .fire_cmd = megasas_fire_cmd_ppc, |
| 296 | .enable_intr = megasas_enable_intr_ppc, |
Sumant Patro | b274cab | 2006-10-03 12:52:12 -0700 | [diff] [blame] | 297 | .disable_intr = megasas_disable_intr_ppc, |
Sumant Patro | f9876f0 | 2006-02-03 15:34:35 -0800 | [diff] [blame] | 298 | .clear_intr = megasas_clear_intr_ppc, |
| 299 | .read_fw_status_reg = megasas_read_fw_status_reg_ppc, |
| 300 | }; |
| 301 | |
| 302 | /** |
| 303 | * This is the end of set of functions & definitions |
| 304 | * specific to ppc (deviceid : 0x60) controllers |
| 305 | */ |
| 306 | |
| 307 | /** |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 308 | * megasas_issue_polled - Issues a polling command |
| 309 | * @instance: Adapter soft state |
| 310 | * @cmd: Command packet to be issued |
| 311 | * |
| 312 | * For polling, MFI requires the cmd_status to be set to 0xFF before posting. |
| 313 | */ |
| 314 | static int |
| 315 | megasas_issue_polled(struct megasas_instance *instance, struct megasas_cmd *cmd) |
| 316 | { |
| 317 | int i; |
| 318 | u32 msecs = MFI_POLL_TIMEOUT_SECS * 1000; |
| 319 | |
| 320 | struct megasas_header *frame_hdr = &cmd->frame->hdr; |
| 321 | |
| 322 | frame_hdr->cmd_status = 0xFF; |
| 323 | frame_hdr->flags |= MFI_FRAME_DONT_POST_IN_REPLY_QUEUE; |
| 324 | |
| 325 | /* |
| 326 | * Issue the frame using inbound queue port |
| 327 | */ |
Sumant Patro | 1341c93 | 2006-01-25 12:02:40 -0800 | [diff] [blame] | 328 | instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 329 | |
| 330 | /* |
| 331 | * Wait for cmd_status to change |
| 332 | */ |
| 333 | for (i = 0; (i < msecs) && (frame_hdr->cmd_status == 0xff); i++) { |
| 334 | rmb(); |
| 335 | msleep(1); |
| 336 | } |
| 337 | |
| 338 | if (frame_hdr->cmd_status == 0xff) |
| 339 | return -ETIME; |
| 340 | |
| 341 | return 0; |
| 342 | } |
| 343 | |
| 344 | /** |
| 345 | * megasas_issue_blocked_cmd - Synchronous wrapper around regular FW cmds |
| 346 | * @instance: Adapter soft state |
| 347 | * @cmd: Command to be issued |
| 348 | * |
| 349 | * This function waits on an event for the command to be returned from ISR. |
Sumant Patro | 2a3681e | 2006-10-03 13:19:21 -0700 | [diff] [blame^] | 350 | * Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 351 | * Used to issue ioctl commands. |
| 352 | */ |
| 353 | static int |
| 354 | megasas_issue_blocked_cmd(struct megasas_instance *instance, |
| 355 | struct megasas_cmd *cmd) |
| 356 | { |
| 357 | cmd->cmd_status = ENODATA; |
| 358 | |
Sumant Patro | 1341c93 | 2006-01-25 12:02:40 -0800 | [diff] [blame] | 359 | instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 360 | |
Sumant Patro | 2a3681e | 2006-10-03 13:19:21 -0700 | [diff] [blame^] | 361 | wait_event_timeout(instance->int_cmd_wait_q, (cmd->cmd_status != ENODATA), |
| 362 | MEGASAS_INTERNAL_CMD_WAIT_TIME*HZ); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 363 | |
| 364 | return 0; |
| 365 | } |
| 366 | |
| 367 | /** |
| 368 | * megasas_issue_blocked_abort_cmd - Aborts previously issued cmd |
| 369 | * @instance: Adapter soft state |
| 370 | * @cmd_to_abort: Previously issued cmd to be aborted |
| 371 | * |
| 372 | * MFI firmware can abort previously issued AEN comamnd (automatic event |
| 373 | * notification). The megasas_issue_blocked_abort_cmd() issues such abort |
Sumant Patro | 2a3681e | 2006-10-03 13:19:21 -0700 | [diff] [blame^] | 374 | * cmd and waits for return status. |
| 375 | * Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 376 | */ |
| 377 | static int |
| 378 | megasas_issue_blocked_abort_cmd(struct megasas_instance *instance, |
| 379 | struct megasas_cmd *cmd_to_abort) |
| 380 | { |
| 381 | struct megasas_cmd *cmd; |
| 382 | struct megasas_abort_frame *abort_fr; |
| 383 | |
| 384 | cmd = megasas_get_cmd(instance); |
| 385 | |
| 386 | if (!cmd) |
| 387 | return -1; |
| 388 | |
| 389 | abort_fr = &cmd->frame->abort; |
| 390 | |
| 391 | /* |
| 392 | * Prepare and issue the abort frame |
| 393 | */ |
| 394 | abort_fr->cmd = MFI_CMD_ABORT; |
| 395 | abort_fr->cmd_status = 0xFF; |
| 396 | abort_fr->flags = 0; |
| 397 | abort_fr->abort_context = cmd_to_abort->index; |
| 398 | abort_fr->abort_mfi_phys_addr_lo = cmd_to_abort->frame_phys_addr; |
| 399 | abort_fr->abort_mfi_phys_addr_hi = 0; |
| 400 | |
| 401 | cmd->sync_cmd = 1; |
| 402 | cmd->cmd_status = 0xFF; |
| 403 | |
Sumant Patro | 1341c93 | 2006-01-25 12:02:40 -0800 | [diff] [blame] | 404 | instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 405 | |
| 406 | /* |
| 407 | * Wait for this cmd to complete |
| 408 | */ |
Sumant Patro | 2a3681e | 2006-10-03 13:19:21 -0700 | [diff] [blame^] | 409 | wait_event_timeout(instance->abort_cmd_wait_q, (cmd->cmd_status != 0xFF), |
| 410 | MEGASAS_INTERNAL_CMD_WAIT_TIME*HZ); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 411 | |
| 412 | megasas_return_cmd(instance, cmd); |
| 413 | return 0; |
| 414 | } |
| 415 | |
| 416 | /** |
| 417 | * megasas_make_sgl32 - Prepares 32-bit SGL |
| 418 | * @instance: Adapter soft state |
| 419 | * @scp: SCSI command from the mid-layer |
| 420 | * @mfi_sgl: SGL to be filled in |
| 421 | * |
| 422 | * If successful, this function returns the number of SG elements. Otherwise, |
| 423 | * it returnes -1. |
| 424 | */ |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 425 | static int |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 426 | megasas_make_sgl32(struct megasas_instance *instance, struct scsi_cmnd *scp, |
| 427 | union megasas_sgl *mfi_sgl) |
| 428 | { |
| 429 | int i; |
| 430 | int sge_count; |
| 431 | struct scatterlist *os_sgl; |
| 432 | |
| 433 | /* |
| 434 | * Return 0 if there is no data transfer |
| 435 | */ |
| 436 | if (!scp->request_buffer || !scp->request_bufflen) |
| 437 | return 0; |
| 438 | |
| 439 | if (!scp->use_sg) { |
| 440 | mfi_sgl->sge32[0].phys_addr = pci_map_single(instance->pdev, |
| 441 | scp-> |
| 442 | request_buffer, |
| 443 | scp-> |
| 444 | request_bufflen, |
| 445 | scp-> |
| 446 | sc_data_direction); |
| 447 | mfi_sgl->sge32[0].length = scp->request_bufflen; |
| 448 | |
| 449 | return 1; |
| 450 | } |
| 451 | |
| 452 | os_sgl = (struct scatterlist *)scp->request_buffer; |
| 453 | sge_count = pci_map_sg(instance->pdev, os_sgl, scp->use_sg, |
| 454 | scp->sc_data_direction); |
| 455 | |
| 456 | for (i = 0; i < sge_count; i++, os_sgl++) { |
| 457 | mfi_sgl->sge32[i].length = sg_dma_len(os_sgl); |
| 458 | mfi_sgl->sge32[i].phys_addr = sg_dma_address(os_sgl); |
| 459 | } |
| 460 | |
| 461 | return sge_count; |
| 462 | } |
| 463 | |
| 464 | /** |
| 465 | * megasas_make_sgl64 - Prepares 64-bit SGL |
| 466 | * @instance: Adapter soft state |
| 467 | * @scp: SCSI command from the mid-layer |
| 468 | * @mfi_sgl: SGL to be filled in |
| 469 | * |
| 470 | * If successful, this function returns the number of SG elements. Otherwise, |
| 471 | * it returnes -1. |
| 472 | */ |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 473 | static int |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 474 | megasas_make_sgl64(struct megasas_instance *instance, struct scsi_cmnd *scp, |
| 475 | union megasas_sgl *mfi_sgl) |
| 476 | { |
| 477 | int i; |
| 478 | int sge_count; |
| 479 | struct scatterlist *os_sgl; |
| 480 | |
| 481 | /* |
| 482 | * Return 0 if there is no data transfer |
| 483 | */ |
| 484 | if (!scp->request_buffer || !scp->request_bufflen) |
| 485 | return 0; |
| 486 | |
| 487 | if (!scp->use_sg) { |
| 488 | mfi_sgl->sge64[0].phys_addr = pci_map_single(instance->pdev, |
| 489 | scp-> |
| 490 | request_buffer, |
| 491 | scp-> |
| 492 | request_bufflen, |
| 493 | scp-> |
| 494 | sc_data_direction); |
| 495 | |
| 496 | mfi_sgl->sge64[0].length = scp->request_bufflen; |
| 497 | |
| 498 | return 1; |
| 499 | } |
| 500 | |
| 501 | os_sgl = (struct scatterlist *)scp->request_buffer; |
| 502 | sge_count = pci_map_sg(instance->pdev, os_sgl, scp->use_sg, |
| 503 | scp->sc_data_direction); |
| 504 | |
| 505 | for (i = 0; i < sge_count; i++, os_sgl++) { |
| 506 | mfi_sgl->sge64[i].length = sg_dma_len(os_sgl); |
| 507 | mfi_sgl->sge64[i].phys_addr = sg_dma_address(os_sgl); |
| 508 | } |
| 509 | |
| 510 | return sge_count; |
| 511 | } |
| 512 | |
Sumant Patro | b1df99d | 2006-10-03 12:40:47 -0700 | [diff] [blame] | 513 | /** |
| 514 | * megasas_get_frame_count - Computes the number of frames |
| 515 | * @sge_count : number of sg elements |
| 516 | * |
| 517 | * Returns the number of frames required for numnber of sge's (sge_count) |
| 518 | */ |
| 519 | |
| 520 | u32 megasas_get_frame_count(u8 sge_count) |
| 521 | { |
| 522 | int num_cnt; |
| 523 | int sge_bytes; |
| 524 | u32 sge_sz; |
| 525 | u32 frame_count=0; |
| 526 | |
| 527 | sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) : |
| 528 | sizeof(struct megasas_sge32); |
| 529 | |
| 530 | /* |
| 531 | * Main frame can contain 2 SGEs for 64-bit SGLs and |
| 532 | * 3 SGEs for 32-bit SGLs |
| 533 | */ |
| 534 | if (IS_DMA64) |
| 535 | num_cnt = sge_count - 2; |
| 536 | else |
| 537 | num_cnt = sge_count - 3; |
| 538 | |
| 539 | if(num_cnt>0){ |
| 540 | sge_bytes = sge_sz * num_cnt; |
| 541 | |
| 542 | frame_count = (sge_bytes / MEGAMFI_FRAME_SIZE) + |
| 543 | ((sge_bytes % MEGAMFI_FRAME_SIZE) ? 1 : 0) ; |
| 544 | } |
| 545 | /* Main frame */ |
| 546 | frame_count +=1; |
| 547 | |
| 548 | if (frame_count > 7) |
| 549 | frame_count = 8; |
| 550 | return frame_count; |
| 551 | } |
| 552 | |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 553 | /** |
| 554 | * megasas_build_dcdb - Prepares a direct cdb (DCDB) command |
| 555 | * @instance: Adapter soft state |
| 556 | * @scp: SCSI command |
| 557 | * @cmd: Command to be prepared in |
| 558 | * |
| 559 | * This function prepares CDB commands. These are typcially pass-through |
| 560 | * commands to the devices. |
| 561 | */ |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 562 | static int |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 563 | megasas_build_dcdb(struct megasas_instance *instance, struct scsi_cmnd *scp, |
| 564 | struct megasas_cmd *cmd) |
| 565 | { |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 566 | u32 is_logical; |
| 567 | u32 device_id; |
| 568 | u16 flags = 0; |
| 569 | struct megasas_pthru_frame *pthru; |
| 570 | |
| 571 | is_logical = MEGASAS_IS_LOGICAL(scp); |
| 572 | device_id = MEGASAS_DEV_INDEX(instance, scp); |
| 573 | pthru = (struct megasas_pthru_frame *)cmd->frame; |
| 574 | |
| 575 | if (scp->sc_data_direction == PCI_DMA_TODEVICE) |
| 576 | flags = MFI_FRAME_DIR_WRITE; |
| 577 | else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE) |
| 578 | flags = MFI_FRAME_DIR_READ; |
| 579 | else if (scp->sc_data_direction == PCI_DMA_NONE) |
| 580 | flags = MFI_FRAME_DIR_NONE; |
| 581 | |
| 582 | /* |
| 583 | * Prepare the DCDB frame |
| 584 | */ |
| 585 | pthru->cmd = (is_logical) ? MFI_CMD_LD_SCSI_IO : MFI_CMD_PD_SCSI_IO; |
| 586 | pthru->cmd_status = 0x0; |
| 587 | pthru->scsi_status = 0x0; |
| 588 | pthru->target_id = device_id; |
| 589 | pthru->lun = scp->device->lun; |
| 590 | pthru->cdb_len = scp->cmd_len; |
| 591 | pthru->timeout = 0; |
| 592 | pthru->flags = flags; |
| 593 | pthru->data_xfer_len = scp->request_bufflen; |
| 594 | |
| 595 | memcpy(pthru->cdb, scp->cmnd, scp->cmd_len); |
| 596 | |
| 597 | /* |
| 598 | * Construct SGL |
| 599 | */ |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 600 | if (IS_DMA64) { |
| 601 | pthru->flags |= MFI_FRAME_SGL64; |
| 602 | pthru->sge_count = megasas_make_sgl64(instance, scp, |
| 603 | &pthru->sgl); |
| 604 | } else |
| 605 | pthru->sge_count = megasas_make_sgl32(instance, scp, |
| 606 | &pthru->sgl); |
| 607 | |
| 608 | /* |
| 609 | * Sense info specific |
| 610 | */ |
| 611 | pthru->sense_len = SCSI_SENSE_BUFFERSIZE; |
| 612 | pthru->sense_buf_phys_addr_hi = 0; |
| 613 | pthru->sense_buf_phys_addr_lo = cmd->sense_phys_addr; |
| 614 | |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 615 | /* |
| 616 | * Compute the total number of frames this command consumes. FW uses |
| 617 | * this number to pull sufficient number of frames from host memory. |
| 618 | */ |
Sumant Patro | b1df99d | 2006-10-03 12:40:47 -0700 | [diff] [blame] | 619 | cmd->frame_count = megasas_get_frame_count(pthru->sge_count); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 620 | |
| 621 | return cmd->frame_count; |
| 622 | } |
| 623 | |
| 624 | /** |
| 625 | * megasas_build_ldio - Prepares IOs to logical devices |
| 626 | * @instance: Adapter soft state |
| 627 | * @scp: SCSI command |
| 628 | * @cmd: Command to to be prepared |
| 629 | * |
| 630 | * Frames (and accompanying SGLs) for regular SCSI IOs use this function. |
| 631 | */ |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 632 | static int |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 633 | megasas_build_ldio(struct megasas_instance *instance, struct scsi_cmnd *scp, |
| 634 | struct megasas_cmd *cmd) |
| 635 | { |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 636 | u32 device_id; |
| 637 | u8 sc = scp->cmnd[0]; |
| 638 | u16 flags = 0; |
| 639 | struct megasas_io_frame *ldio; |
| 640 | |
| 641 | device_id = MEGASAS_DEV_INDEX(instance, scp); |
| 642 | ldio = (struct megasas_io_frame *)cmd->frame; |
| 643 | |
| 644 | if (scp->sc_data_direction == PCI_DMA_TODEVICE) |
| 645 | flags = MFI_FRAME_DIR_WRITE; |
| 646 | else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE) |
| 647 | flags = MFI_FRAME_DIR_READ; |
| 648 | |
| 649 | /* |
Sumant Patro | b1df99d | 2006-10-03 12:40:47 -0700 | [diff] [blame] | 650 | * Prepare the Logical IO frame: 2nd bit is zero for all read cmds |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 651 | */ |
| 652 | ldio->cmd = (sc & 0x02) ? MFI_CMD_LD_WRITE : MFI_CMD_LD_READ; |
| 653 | ldio->cmd_status = 0x0; |
| 654 | ldio->scsi_status = 0x0; |
| 655 | ldio->target_id = device_id; |
| 656 | ldio->timeout = 0; |
| 657 | ldio->reserved_0 = 0; |
| 658 | ldio->pad_0 = 0; |
| 659 | ldio->flags = flags; |
| 660 | ldio->start_lba_hi = 0; |
| 661 | ldio->access_byte = (scp->cmd_len != 6) ? scp->cmnd[1] : 0; |
| 662 | |
| 663 | /* |
| 664 | * 6-byte READ(0x08) or WRITE(0x0A) cdb |
| 665 | */ |
| 666 | if (scp->cmd_len == 6) { |
| 667 | ldio->lba_count = (u32) scp->cmnd[4]; |
| 668 | ldio->start_lba_lo = ((u32) scp->cmnd[1] << 16) | |
| 669 | ((u32) scp->cmnd[2] << 8) | (u32) scp->cmnd[3]; |
| 670 | |
| 671 | ldio->start_lba_lo &= 0x1FFFFF; |
| 672 | } |
| 673 | |
| 674 | /* |
| 675 | * 10-byte READ(0x28) or WRITE(0x2A) cdb |
| 676 | */ |
| 677 | else if (scp->cmd_len == 10) { |
| 678 | ldio->lba_count = (u32) scp->cmnd[8] | |
| 679 | ((u32) scp->cmnd[7] << 8); |
| 680 | ldio->start_lba_lo = ((u32) scp->cmnd[2] << 24) | |
| 681 | ((u32) scp->cmnd[3] << 16) | |
| 682 | ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5]; |
| 683 | } |
| 684 | |
| 685 | /* |
| 686 | * 12-byte READ(0xA8) or WRITE(0xAA) cdb |
| 687 | */ |
| 688 | else if (scp->cmd_len == 12) { |
| 689 | ldio->lba_count = ((u32) scp->cmnd[6] << 24) | |
| 690 | ((u32) scp->cmnd[7] << 16) | |
| 691 | ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9]; |
| 692 | |
| 693 | ldio->start_lba_lo = ((u32) scp->cmnd[2] << 24) | |
| 694 | ((u32) scp->cmnd[3] << 16) | |
| 695 | ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5]; |
| 696 | } |
| 697 | |
| 698 | /* |
| 699 | * 16-byte READ(0x88) or WRITE(0x8A) cdb |
| 700 | */ |
| 701 | else if (scp->cmd_len == 16) { |
| 702 | ldio->lba_count = ((u32) scp->cmnd[10] << 24) | |
| 703 | ((u32) scp->cmnd[11] << 16) | |
| 704 | ((u32) scp->cmnd[12] << 8) | (u32) scp->cmnd[13]; |
| 705 | |
| 706 | ldio->start_lba_lo = ((u32) scp->cmnd[6] << 24) | |
| 707 | ((u32) scp->cmnd[7] << 16) | |
| 708 | ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9]; |
| 709 | |
| 710 | ldio->start_lba_hi = ((u32) scp->cmnd[2] << 24) | |
| 711 | ((u32) scp->cmnd[3] << 16) | |
| 712 | ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5]; |
| 713 | |
| 714 | } |
| 715 | |
| 716 | /* |
| 717 | * Construct SGL |
| 718 | */ |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 719 | if (IS_DMA64) { |
| 720 | ldio->flags |= MFI_FRAME_SGL64; |
| 721 | ldio->sge_count = megasas_make_sgl64(instance, scp, &ldio->sgl); |
| 722 | } else |
| 723 | ldio->sge_count = megasas_make_sgl32(instance, scp, &ldio->sgl); |
| 724 | |
| 725 | /* |
| 726 | * Sense info specific |
| 727 | */ |
| 728 | ldio->sense_len = SCSI_SENSE_BUFFERSIZE; |
| 729 | ldio->sense_buf_phys_addr_hi = 0; |
| 730 | ldio->sense_buf_phys_addr_lo = cmd->sense_phys_addr; |
| 731 | |
Sumant Patro | b1df99d | 2006-10-03 12:40:47 -0700 | [diff] [blame] | 732 | /* |
| 733 | * Compute the total number of frames this command consumes. FW uses |
| 734 | * this number to pull sufficient number of frames from host memory. |
| 735 | */ |
| 736 | cmd->frame_count = megasas_get_frame_count(ldio->sge_count); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 737 | |
| 738 | return cmd->frame_count; |
| 739 | } |
| 740 | |
| 741 | /** |
Sumant Patro | cb59aa6 | 2006-01-25 11:53:25 -0800 | [diff] [blame] | 742 | * megasas_is_ldio - Checks if the cmd is for logical drive |
| 743 | * @scmd: SCSI command |
| 744 | * |
| 745 | * Called by megasas_queue_command to find out if the command to be queued |
| 746 | * is a logical drive command |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 747 | */ |
Sumant Patro | cb59aa6 | 2006-01-25 11:53:25 -0800 | [diff] [blame] | 748 | static inline int megasas_is_ldio(struct scsi_cmnd *cmd) |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 749 | { |
Sumant Patro | cb59aa6 | 2006-01-25 11:53:25 -0800 | [diff] [blame] | 750 | if (!MEGASAS_IS_LOGICAL(cmd)) |
| 751 | return 0; |
| 752 | switch (cmd->cmnd[0]) { |
| 753 | case READ_10: |
| 754 | case WRITE_10: |
| 755 | case READ_12: |
| 756 | case WRITE_12: |
| 757 | case READ_6: |
| 758 | case WRITE_6: |
| 759 | case READ_16: |
| 760 | case WRITE_16: |
| 761 | return 1; |
| 762 | default: |
| 763 | return 0; |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 764 | } |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 765 | } |
| 766 | |
Sumant Patro | 658dced | 2006-10-03 13:09:14 -0700 | [diff] [blame] | 767 | /** |
| 768 | * megasas_dump_pending_frames - Dumps the frame address of all pending cmds |
| 769 | * in FW |
| 770 | * @instance: Adapter soft state |
| 771 | */ |
| 772 | static inline void |
| 773 | megasas_dump_pending_frames(struct megasas_instance *instance) |
| 774 | { |
| 775 | struct megasas_cmd *cmd; |
| 776 | int i,n; |
| 777 | union megasas_sgl *mfi_sgl; |
| 778 | struct megasas_io_frame *ldio; |
| 779 | struct megasas_pthru_frame *pthru; |
| 780 | u32 sgcount; |
| 781 | u32 max_cmd = instance->max_fw_cmds; |
| 782 | |
| 783 | printk(KERN_ERR "\nmegasas[%d]: Dumping Frame Phys Address of all pending cmds in FW\n",instance->host->host_no); |
| 784 | printk(KERN_ERR "megasas[%d]: Total OS Pending cmds : %d\n",instance->host->host_no,atomic_read(&instance->fw_outstanding)); |
| 785 | if (IS_DMA64) |
| 786 | printk(KERN_ERR "\nmegasas[%d]: 64 bit SGLs were sent to FW\n",instance->host->host_no); |
| 787 | else |
| 788 | printk(KERN_ERR "\nmegasas[%d]: 32 bit SGLs were sent to FW\n",instance->host->host_no); |
| 789 | |
| 790 | printk(KERN_ERR "megasas[%d]: Pending OS cmds in FW : \n",instance->host->host_no); |
| 791 | for (i = 0; i < max_cmd; i++) { |
| 792 | cmd = instance->cmd_list[i]; |
| 793 | if(!cmd->scmd) |
| 794 | continue; |
| 795 | printk(KERN_ERR "megasas[%d]: Frame addr :0x%08lx : ",instance->host->host_no,(unsigned long)cmd->frame_phys_addr); |
| 796 | if (megasas_is_ldio(cmd->scmd)){ |
| 797 | ldio = (struct megasas_io_frame *)cmd->frame; |
| 798 | mfi_sgl = &ldio->sgl; |
| 799 | sgcount = ldio->sge_count; |
| 800 | printk(KERN_ERR "megasas[%d]: frame count : 0x%x, Cmd : 0x%x, Tgt id : 0x%x, lba lo : 0x%x, lba_hi : 0x%x, sense_buf addr : 0x%x,sge count : 0x%x\n",instance->host->host_no, cmd->frame_count,ldio->cmd,ldio->target_id, ldio->start_lba_lo,ldio->start_lba_hi,ldio->sense_buf_phys_addr_lo,sgcount); |
| 801 | } |
| 802 | else { |
| 803 | pthru = (struct megasas_pthru_frame *) cmd->frame; |
| 804 | mfi_sgl = &pthru->sgl; |
| 805 | sgcount = pthru->sge_count; |
| 806 | printk(KERN_ERR "megasas[%d]: frame count : 0x%x, Cmd : 0x%x, Tgt id : 0x%x, lun : 0x%x, cdb_len : 0x%x, data xfer len : 0x%x, sense_buf addr : 0x%x,sge count : 0x%x\n",instance->host->host_no,cmd->frame_count,pthru->cmd,pthru->target_id,pthru->lun,pthru->cdb_len , pthru->data_xfer_len,pthru->sense_buf_phys_addr_lo,sgcount); |
| 807 | } |
| 808 | if(megasas_dbg_lvl & MEGASAS_DBG_LVL){ |
| 809 | for (n = 0; n < sgcount; n++){ |
| 810 | if (IS_DMA64) |
| 811 | printk(KERN_ERR "megasas: sgl len : 0x%x, sgl addr : 0x%08lx ",mfi_sgl->sge64[n].length , (unsigned long)mfi_sgl->sge64[n].phys_addr) ; |
| 812 | else |
| 813 | printk(KERN_ERR "megasas: sgl len : 0x%x, sgl addr : 0x%x ",mfi_sgl->sge32[n].length , mfi_sgl->sge32[n].phys_addr) ; |
| 814 | } |
| 815 | } |
| 816 | printk(KERN_ERR "\n"); |
| 817 | } /*for max_cmd*/ |
| 818 | printk(KERN_ERR "\nmegasas[%d]: Pending Internal cmds in FW : \n",instance->host->host_no); |
| 819 | for (i = 0; i < max_cmd; i++) { |
| 820 | |
| 821 | cmd = instance->cmd_list[i]; |
| 822 | |
| 823 | if(cmd->sync_cmd == 1){ |
| 824 | printk(KERN_ERR "0x%08lx : ", (unsigned long)cmd->frame_phys_addr); |
| 825 | } |
| 826 | } |
| 827 | printk(KERN_ERR "megasas[%d]: Dumping Done.\n\n",instance->host->host_no); |
| 828 | } |
| 829 | |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 830 | /** |
| 831 | * megasas_queue_command - Queue entry point |
| 832 | * @scmd: SCSI command to be queued |
| 833 | * @done: Callback entry point |
| 834 | */ |
| 835 | static int |
| 836 | megasas_queue_command(struct scsi_cmnd *scmd, void (*done) (struct scsi_cmnd *)) |
| 837 | { |
| 838 | u32 frame_count; |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 839 | struct megasas_cmd *cmd; |
| 840 | struct megasas_instance *instance; |
| 841 | |
| 842 | instance = (struct megasas_instance *) |
| 843 | scmd->device->host->hostdata; |
| 844 | scmd->scsi_done = done; |
| 845 | scmd->result = 0; |
| 846 | |
Sumant Patro | cb59aa6 | 2006-01-25 11:53:25 -0800 | [diff] [blame] | 847 | if (MEGASAS_IS_LOGICAL(scmd) && |
| 848 | (scmd->device->id >= MEGASAS_MAX_LD || scmd->device->lun)) { |
| 849 | scmd->result = DID_BAD_TARGET << 16; |
| 850 | goto out_done; |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 851 | } |
| 852 | |
Sumant Patro | cb59aa6 | 2006-01-25 11:53:25 -0800 | [diff] [blame] | 853 | cmd = megasas_get_cmd(instance); |
| 854 | if (!cmd) |
| 855 | return SCSI_MLQUEUE_HOST_BUSY; |
| 856 | |
| 857 | /* |
| 858 | * Logical drive command |
| 859 | */ |
| 860 | if (megasas_is_ldio(scmd)) |
| 861 | frame_count = megasas_build_ldio(instance, scmd, cmd); |
| 862 | else |
| 863 | frame_count = megasas_build_dcdb(instance, scmd, cmd); |
| 864 | |
| 865 | if (!frame_count) |
| 866 | goto out_return_cmd; |
| 867 | |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 868 | cmd->scmd = scmd; |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 869 | |
| 870 | /* |
| 871 | * Issue the command to the FW |
| 872 | */ |
Sumant Patro | e4a082c | 2006-05-30 12:03:37 -0700 | [diff] [blame] | 873 | atomic_inc(&instance->fw_outstanding); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 874 | |
Sumant Patro | 1341c93 | 2006-01-25 12:02:40 -0800 | [diff] [blame] | 875 | instance->instancet->fire_cmd(cmd->frame_phys_addr ,cmd->frame_count-1,instance->reg_set); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 876 | |
| 877 | return 0; |
Sumant Patro | cb59aa6 | 2006-01-25 11:53:25 -0800 | [diff] [blame] | 878 | |
| 879 | out_return_cmd: |
| 880 | megasas_return_cmd(instance, cmd); |
| 881 | out_done: |
| 882 | done(scmd); |
| 883 | return 0; |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 884 | } |
| 885 | |
Christoph Hellwig | 147aab6 | 2006-02-17 12:13:48 +0100 | [diff] [blame] | 886 | static int megasas_slave_configure(struct scsi_device *sdev) |
| 887 | { |
| 888 | /* |
| 889 | * Don't export physical disk devices to the disk driver. |
| 890 | * |
| 891 | * FIXME: Currently we don't export them to the midlayer at all. |
| 892 | * That will be fixed once LSI engineers have audited the |
| 893 | * firmware for possible issues. |
| 894 | */ |
| 895 | if (sdev->channel < MEGASAS_MAX_PD_CHANNELS && sdev->type == TYPE_DISK) |
| 896 | return -ENXIO; |
Christoph Hellwig | e5b3a65 | 2006-03-10 17:08:57 +0100 | [diff] [blame] | 897 | |
| 898 | /* |
| 899 | * The RAID firmware may require extended timeouts. |
| 900 | */ |
| 901 | if (sdev->channel >= MEGASAS_MAX_PD_CHANNELS) |
| 902 | sdev->timeout = 90 * HZ; |
Christoph Hellwig | 147aab6 | 2006-02-17 12:13:48 +0100 | [diff] [blame] | 903 | return 0; |
| 904 | } |
| 905 | |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 906 | /** |
| 907 | * megasas_wait_for_outstanding - Wait for all outstanding cmds |
| 908 | * @instance: Adapter soft state |
| 909 | * |
| 910 | * This function waits for upto MEGASAS_RESET_WAIT_TIME seconds for FW to |
| 911 | * complete all its outstanding commands. Returns error if one or more IOs |
| 912 | * are pending after this time period. It also marks the controller dead. |
| 913 | */ |
| 914 | static int megasas_wait_for_outstanding(struct megasas_instance *instance) |
| 915 | { |
| 916 | int i; |
| 917 | u32 wait_time = MEGASAS_RESET_WAIT_TIME; |
| 918 | |
| 919 | for (i = 0; i < wait_time; i++) { |
| 920 | |
Sumant Patro | e4a082c | 2006-05-30 12:03:37 -0700 | [diff] [blame] | 921 | int outstanding = atomic_read(&instance->fw_outstanding); |
| 922 | |
| 923 | if (!outstanding) |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 924 | break; |
| 925 | |
| 926 | if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) { |
| 927 | printk(KERN_NOTICE "megasas: [%2d]waiting for %d " |
Sumant Patro | e4a082c | 2006-05-30 12:03:37 -0700 | [diff] [blame] | 928 | "commands to complete\n",i,outstanding); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 929 | } |
| 930 | |
| 931 | msleep(1000); |
| 932 | } |
| 933 | |
Sumant Patro | e4a082c | 2006-05-30 12:03:37 -0700 | [diff] [blame] | 934 | if (atomic_read(&instance->fw_outstanding)) { |
Sumant Patro | e3bbff9 | 2006-10-03 12:28:49 -0700 | [diff] [blame] | 935 | /* |
| 936 | * Send signal to FW to stop processing any pending cmds. |
| 937 | * The controller will be taken offline by the OS now. |
| 938 | */ |
| 939 | writel(MFI_STOP_ADP, |
| 940 | &instance->reg_set->inbound_doorbell); |
Sumant Patro | 658dced | 2006-10-03 13:09:14 -0700 | [diff] [blame] | 941 | megasas_dump_pending_frames(instance); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 942 | instance->hw_crit_error = 1; |
| 943 | return FAILED; |
| 944 | } |
| 945 | |
| 946 | return SUCCESS; |
| 947 | } |
| 948 | |
| 949 | /** |
| 950 | * megasas_generic_reset - Generic reset routine |
| 951 | * @scmd: Mid-layer SCSI command |
| 952 | * |
| 953 | * This routine implements a generic reset handler for device, bus and host |
| 954 | * reset requests. Device, bus and host specific reset handlers can use this |
| 955 | * function after they do their specific tasks. |
| 956 | */ |
| 957 | static int megasas_generic_reset(struct scsi_cmnd *scmd) |
| 958 | { |
| 959 | int ret_val; |
| 960 | struct megasas_instance *instance; |
| 961 | |
| 962 | instance = (struct megasas_instance *)scmd->device->host->hostdata; |
| 963 | |
Jeff Garzik | 017560f | 2005-10-24 18:04:36 -0400 | [diff] [blame] | 964 | scmd_printk(KERN_NOTICE, scmd, "megasas: RESET -%ld cmd=%x\n", |
| 965 | scmd->serial_number, scmd->cmnd[0]); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 966 | |
| 967 | if (instance->hw_crit_error) { |
| 968 | printk(KERN_ERR "megasas: cannot recover from previous reset " |
| 969 | "failures\n"); |
| 970 | return FAILED; |
| 971 | } |
| 972 | |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 973 | ret_val = megasas_wait_for_outstanding(instance); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 974 | if (ret_val == SUCCESS) |
| 975 | printk(KERN_NOTICE "megasas: reset successful \n"); |
| 976 | else |
| 977 | printk(KERN_ERR "megasas: failed to do reset\n"); |
| 978 | |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 979 | return ret_val; |
| 980 | } |
| 981 | |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 982 | /** |
| 983 | * megasas_reset_device - Device reset handler entry point |
| 984 | */ |
| 985 | static int megasas_reset_device(struct scsi_cmnd *scmd) |
| 986 | { |
| 987 | int ret; |
| 988 | |
| 989 | /* |
| 990 | * First wait for all commands to complete |
| 991 | */ |
| 992 | ret = megasas_generic_reset(scmd); |
| 993 | |
| 994 | return ret; |
| 995 | } |
| 996 | |
| 997 | /** |
| 998 | * megasas_reset_bus_host - Bus & host reset handler entry point |
| 999 | */ |
| 1000 | static int megasas_reset_bus_host(struct scsi_cmnd *scmd) |
| 1001 | { |
| 1002 | int ret; |
| 1003 | |
| 1004 | /* |
Uwe Zeisberger | 80682fa | 2006-03-22 00:21:33 +0100 | [diff] [blame] | 1005 | * First wait for all commands to complete |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1006 | */ |
| 1007 | ret = megasas_generic_reset(scmd); |
| 1008 | |
| 1009 | return ret; |
| 1010 | } |
| 1011 | |
| 1012 | /** |
| 1013 | * megasas_service_aen - Processes an event notification |
| 1014 | * @instance: Adapter soft state |
| 1015 | * @cmd: AEN command completed by the ISR |
| 1016 | * |
| 1017 | * For AEN, driver sends a command down to FW that is held by the FW till an |
| 1018 | * event occurs. When an event of interest occurs, FW completes the command |
| 1019 | * that it was previously holding. |
| 1020 | * |
| 1021 | * This routines sends SIGIO signal to processes that have registered with the |
| 1022 | * driver for AEN. |
| 1023 | */ |
| 1024 | static void |
| 1025 | megasas_service_aen(struct megasas_instance *instance, struct megasas_cmd *cmd) |
| 1026 | { |
| 1027 | /* |
| 1028 | * Don't signal app if it is just an aborted previously registered aen |
| 1029 | */ |
| 1030 | if (!cmd->abort_aen) |
| 1031 | kill_fasync(&megasas_async_queue, SIGIO, POLL_IN); |
| 1032 | else |
| 1033 | cmd->abort_aen = 0; |
| 1034 | |
| 1035 | instance->aen_cmd = NULL; |
| 1036 | megasas_return_cmd(instance, cmd); |
| 1037 | } |
| 1038 | |
| 1039 | /* |
| 1040 | * Scsi host template for megaraid_sas driver |
| 1041 | */ |
| 1042 | static struct scsi_host_template megasas_template = { |
| 1043 | |
| 1044 | .module = THIS_MODULE, |
| 1045 | .name = "LSI Logic SAS based MegaRAID driver", |
| 1046 | .proc_name = "megaraid_sas", |
Christoph Hellwig | 147aab6 | 2006-02-17 12:13:48 +0100 | [diff] [blame] | 1047 | .slave_configure = megasas_slave_configure, |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1048 | .queuecommand = megasas_queue_command, |
| 1049 | .eh_device_reset_handler = megasas_reset_device, |
| 1050 | .eh_bus_reset_handler = megasas_reset_bus_host, |
| 1051 | .eh_host_reset_handler = megasas_reset_bus_host, |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1052 | .use_clustering = ENABLE_CLUSTERING, |
| 1053 | }; |
| 1054 | |
| 1055 | /** |
| 1056 | * megasas_complete_int_cmd - Completes an internal command |
| 1057 | * @instance: Adapter soft state |
| 1058 | * @cmd: Command to be completed |
| 1059 | * |
| 1060 | * The megasas_issue_blocked_cmd() function waits for a command to complete |
| 1061 | * after it issues a command. This function wakes up that waiting routine by |
| 1062 | * calling wake_up() on the wait queue. |
| 1063 | */ |
| 1064 | static void |
| 1065 | megasas_complete_int_cmd(struct megasas_instance *instance, |
| 1066 | struct megasas_cmd *cmd) |
| 1067 | { |
| 1068 | cmd->cmd_status = cmd->frame->io.cmd_status; |
| 1069 | |
| 1070 | if (cmd->cmd_status == ENODATA) { |
| 1071 | cmd->cmd_status = 0; |
| 1072 | } |
| 1073 | wake_up(&instance->int_cmd_wait_q); |
| 1074 | } |
| 1075 | |
| 1076 | /** |
| 1077 | * megasas_complete_abort - Completes aborting a command |
| 1078 | * @instance: Adapter soft state |
| 1079 | * @cmd: Cmd that was issued to abort another cmd |
| 1080 | * |
| 1081 | * The megasas_issue_blocked_abort_cmd() function waits on abort_cmd_wait_q |
| 1082 | * after it issues an abort on a previously issued command. This function |
| 1083 | * wakes up all functions waiting on the same wait queue. |
| 1084 | */ |
| 1085 | static void |
| 1086 | megasas_complete_abort(struct megasas_instance *instance, |
| 1087 | struct megasas_cmd *cmd) |
| 1088 | { |
| 1089 | if (cmd->sync_cmd) { |
| 1090 | cmd->sync_cmd = 0; |
| 1091 | cmd->cmd_status = 0; |
| 1092 | wake_up(&instance->abort_cmd_wait_q); |
| 1093 | } |
| 1094 | |
| 1095 | return; |
| 1096 | } |
| 1097 | |
| 1098 | /** |
| 1099 | * megasas_unmap_sgbuf - Unmap SG buffers |
| 1100 | * @instance: Adapter soft state |
| 1101 | * @cmd: Completed command |
| 1102 | */ |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 1103 | static void |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1104 | megasas_unmap_sgbuf(struct megasas_instance *instance, struct megasas_cmd *cmd) |
| 1105 | { |
| 1106 | dma_addr_t buf_h; |
| 1107 | u8 opcode; |
| 1108 | |
| 1109 | if (cmd->scmd->use_sg) { |
| 1110 | pci_unmap_sg(instance->pdev, cmd->scmd->request_buffer, |
| 1111 | cmd->scmd->use_sg, cmd->scmd->sc_data_direction); |
| 1112 | return; |
| 1113 | } |
| 1114 | |
| 1115 | if (!cmd->scmd->request_bufflen) |
| 1116 | return; |
| 1117 | |
| 1118 | opcode = cmd->frame->hdr.cmd; |
| 1119 | |
| 1120 | if ((opcode == MFI_CMD_LD_READ) || (opcode == MFI_CMD_LD_WRITE)) { |
| 1121 | if (IS_DMA64) |
| 1122 | buf_h = cmd->frame->io.sgl.sge64[0].phys_addr; |
| 1123 | else |
| 1124 | buf_h = cmd->frame->io.sgl.sge32[0].phys_addr; |
| 1125 | } else { |
| 1126 | if (IS_DMA64) |
| 1127 | buf_h = cmd->frame->pthru.sgl.sge64[0].phys_addr; |
| 1128 | else |
| 1129 | buf_h = cmd->frame->pthru.sgl.sge32[0].phys_addr; |
| 1130 | } |
| 1131 | |
| 1132 | pci_unmap_single(instance->pdev, buf_h, cmd->scmd->request_bufflen, |
| 1133 | cmd->scmd->sc_data_direction); |
| 1134 | return; |
| 1135 | } |
| 1136 | |
| 1137 | /** |
| 1138 | * megasas_complete_cmd - Completes a command |
| 1139 | * @instance: Adapter soft state |
| 1140 | * @cmd: Command to be completed |
| 1141 | * @alt_status: If non-zero, use this value as status to |
| 1142 | * SCSI mid-layer instead of the value returned |
| 1143 | * by the FW. This should be used if caller wants |
| 1144 | * an alternate status (as in the case of aborted |
| 1145 | * commands) |
| 1146 | */ |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 1147 | static void |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1148 | megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd, |
| 1149 | u8 alt_status) |
| 1150 | { |
| 1151 | int exception = 0; |
| 1152 | struct megasas_header *hdr = &cmd->frame->hdr; |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1153 | |
| 1154 | if (cmd->scmd) { |
| 1155 | cmd->scmd->SCp.ptr = (char *)0; |
| 1156 | } |
| 1157 | |
| 1158 | switch (hdr->cmd) { |
| 1159 | |
| 1160 | case MFI_CMD_PD_SCSI_IO: |
| 1161 | case MFI_CMD_LD_SCSI_IO: |
| 1162 | |
| 1163 | /* |
| 1164 | * MFI_CMD_PD_SCSI_IO and MFI_CMD_LD_SCSI_IO could have been |
| 1165 | * issued either through an IO path or an IOCTL path. If it |
| 1166 | * was via IOCTL, we will send it to internal completion. |
| 1167 | */ |
| 1168 | if (cmd->sync_cmd) { |
| 1169 | cmd->sync_cmd = 0; |
| 1170 | megasas_complete_int_cmd(instance, cmd); |
| 1171 | break; |
| 1172 | } |
| 1173 | |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1174 | case MFI_CMD_LD_READ: |
| 1175 | case MFI_CMD_LD_WRITE: |
| 1176 | |
| 1177 | if (alt_status) { |
| 1178 | cmd->scmd->result = alt_status << 16; |
| 1179 | exception = 1; |
| 1180 | } |
| 1181 | |
| 1182 | if (exception) { |
| 1183 | |
Sumant Patro | e4a082c | 2006-05-30 12:03:37 -0700 | [diff] [blame] | 1184 | atomic_dec(&instance->fw_outstanding); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1185 | |
| 1186 | megasas_unmap_sgbuf(instance, cmd); |
| 1187 | cmd->scmd->scsi_done(cmd->scmd); |
| 1188 | megasas_return_cmd(instance, cmd); |
| 1189 | |
| 1190 | break; |
| 1191 | } |
| 1192 | |
| 1193 | switch (hdr->cmd_status) { |
| 1194 | |
| 1195 | case MFI_STAT_OK: |
| 1196 | cmd->scmd->result = DID_OK << 16; |
| 1197 | break; |
| 1198 | |
| 1199 | case MFI_STAT_SCSI_IO_FAILED: |
| 1200 | case MFI_STAT_LD_INIT_IN_PROGRESS: |
| 1201 | cmd->scmd->result = |
| 1202 | (DID_ERROR << 16) | hdr->scsi_status; |
| 1203 | break; |
| 1204 | |
| 1205 | case MFI_STAT_SCSI_DONE_WITH_ERROR: |
| 1206 | |
| 1207 | cmd->scmd->result = (DID_OK << 16) | hdr->scsi_status; |
| 1208 | |
| 1209 | if (hdr->scsi_status == SAM_STAT_CHECK_CONDITION) { |
| 1210 | memset(cmd->scmd->sense_buffer, 0, |
| 1211 | SCSI_SENSE_BUFFERSIZE); |
| 1212 | memcpy(cmd->scmd->sense_buffer, cmd->sense, |
| 1213 | hdr->sense_len); |
| 1214 | |
| 1215 | cmd->scmd->result |= DRIVER_SENSE << 24; |
| 1216 | } |
| 1217 | |
| 1218 | break; |
| 1219 | |
| 1220 | case MFI_STAT_LD_OFFLINE: |
| 1221 | case MFI_STAT_DEVICE_NOT_FOUND: |
| 1222 | cmd->scmd->result = DID_BAD_TARGET << 16; |
| 1223 | break; |
| 1224 | |
| 1225 | default: |
| 1226 | printk(KERN_DEBUG "megasas: MFI FW status %#x\n", |
| 1227 | hdr->cmd_status); |
| 1228 | cmd->scmd->result = DID_ERROR << 16; |
| 1229 | break; |
| 1230 | } |
| 1231 | |
Sumant Patro | e4a082c | 2006-05-30 12:03:37 -0700 | [diff] [blame] | 1232 | atomic_dec(&instance->fw_outstanding); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1233 | |
| 1234 | megasas_unmap_sgbuf(instance, cmd); |
| 1235 | cmd->scmd->scsi_done(cmd->scmd); |
| 1236 | megasas_return_cmd(instance, cmd); |
| 1237 | |
| 1238 | break; |
| 1239 | |
| 1240 | case MFI_CMD_SMP: |
| 1241 | case MFI_CMD_STP: |
| 1242 | case MFI_CMD_DCMD: |
| 1243 | |
| 1244 | /* |
| 1245 | * See if got an event notification |
| 1246 | */ |
| 1247 | if (cmd->frame->dcmd.opcode == MR_DCMD_CTRL_EVENT_WAIT) |
| 1248 | megasas_service_aen(instance, cmd); |
| 1249 | else |
| 1250 | megasas_complete_int_cmd(instance, cmd); |
| 1251 | |
| 1252 | break; |
| 1253 | |
| 1254 | case MFI_CMD_ABORT: |
| 1255 | /* |
| 1256 | * Cmd issued to abort another cmd returned |
| 1257 | */ |
| 1258 | megasas_complete_abort(instance, cmd); |
| 1259 | break; |
| 1260 | |
| 1261 | default: |
| 1262 | printk("megasas: Unknown command completed! [0x%X]\n", |
| 1263 | hdr->cmd); |
| 1264 | break; |
| 1265 | } |
| 1266 | } |
| 1267 | |
| 1268 | /** |
| 1269 | * megasas_deplete_reply_queue - Processes all completed commands |
| 1270 | * @instance: Adapter soft state |
| 1271 | * @alt_status: Alternate status to be returned to |
| 1272 | * SCSI mid-layer instead of the status |
| 1273 | * returned by the FW |
| 1274 | */ |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 1275 | static int |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1276 | megasas_deplete_reply_queue(struct megasas_instance *instance, u8 alt_status) |
| 1277 | { |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1278 | /* |
| 1279 | * Check if it is our interrupt |
Sumant Patro | 1341c93 | 2006-01-25 12:02:40 -0800 | [diff] [blame] | 1280 | * Clear the interrupt |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1281 | */ |
Sumant Patro | 1341c93 | 2006-01-25 12:02:40 -0800 | [diff] [blame] | 1282 | if(instance->instancet->clear_intr(instance->reg_set)) |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1283 | return IRQ_NONE; |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1284 | |
Sumant Patro | 5d018ad | 2006-10-03 13:13:18 -0700 | [diff] [blame] | 1285 | /* |
| 1286 | * Schedule the tasklet for cmd completion |
| 1287 | */ |
| 1288 | tasklet_schedule(&instance->isr_tasklet); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1289 | |
| 1290 | return IRQ_HANDLED; |
| 1291 | } |
| 1292 | |
| 1293 | /** |
| 1294 | * megasas_isr - isr entry point |
| 1295 | */ |
| 1296 | static irqreturn_t megasas_isr(int irq, void *devp, struct pt_regs *regs) |
| 1297 | { |
| 1298 | return megasas_deplete_reply_queue((struct megasas_instance *)devp, |
| 1299 | DID_OK); |
| 1300 | } |
| 1301 | |
| 1302 | /** |
| 1303 | * megasas_transition_to_ready - Move the FW to READY state |
Sumant Patro | 1341c93 | 2006-01-25 12:02:40 -0800 | [diff] [blame] | 1304 | * @instance: Adapter soft state |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1305 | * |
| 1306 | * During the initialization, FW passes can potentially be in any one of |
| 1307 | * several possible states. If the FW in operational, waiting-for-handshake |
| 1308 | * states, driver must take steps to bring it to ready state. Otherwise, it |
| 1309 | * has to wait for the ready state. |
| 1310 | */ |
| 1311 | static int |
Sumant Patro | 1341c93 | 2006-01-25 12:02:40 -0800 | [diff] [blame] | 1312 | megasas_transition_to_ready(struct megasas_instance* instance) |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1313 | { |
| 1314 | int i; |
| 1315 | u8 max_wait; |
| 1316 | u32 fw_state; |
| 1317 | u32 cur_state; |
| 1318 | |
Sumant Patro | 1341c93 | 2006-01-25 12:02:40 -0800 | [diff] [blame] | 1319 | fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) & MFI_STATE_MASK; |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1320 | |
Sumant Patro | e3bbff9 | 2006-10-03 12:28:49 -0700 | [diff] [blame] | 1321 | if (fw_state != MFI_STATE_READY) |
| 1322 | printk(KERN_INFO "megasas: Waiting for FW to come to ready" |
| 1323 | " state\n"); |
| 1324 | |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1325 | while (fw_state != MFI_STATE_READY) { |
| 1326 | |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1327 | switch (fw_state) { |
| 1328 | |
| 1329 | case MFI_STATE_FAULT: |
| 1330 | |
| 1331 | printk(KERN_DEBUG "megasas: FW in FAULT state!!\n"); |
| 1332 | return -ENODEV; |
| 1333 | |
| 1334 | case MFI_STATE_WAIT_HANDSHAKE: |
| 1335 | /* |
| 1336 | * Set the CLR bit in inbound doorbell |
| 1337 | */ |
Sumant Patro | e3bbff9 | 2006-10-03 12:28:49 -0700 | [diff] [blame] | 1338 | writel(MFI_INIT_CLEAR_HANDSHAKE|MFI_INIT_HOTPLUG, |
Sumant Patro | 1341c93 | 2006-01-25 12:02:40 -0800 | [diff] [blame] | 1339 | &instance->reg_set->inbound_doorbell); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1340 | |
| 1341 | max_wait = 2; |
| 1342 | cur_state = MFI_STATE_WAIT_HANDSHAKE; |
| 1343 | break; |
| 1344 | |
Sumant Patro | e3bbff9 | 2006-10-03 12:28:49 -0700 | [diff] [blame] | 1345 | case MFI_STATE_BOOT_MESSAGE_PENDING: |
| 1346 | writel(MFI_INIT_HOTPLUG, |
| 1347 | &instance->reg_set->inbound_doorbell); |
| 1348 | |
| 1349 | max_wait = 10; |
| 1350 | cur_state = MFI_STATE_BOOT_MESSAGE_PENDING; |
| 1351 | break; |
| 1352 | |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1353 | case MFI_STATE_OPERATIONAL: |
| 1354 | /* |
Sumant Patro | e3bbff9 | 2006-10-03 12:28:49 -0700 | [diff] [blame] | 1355 | * Bring it to READY state; assuming max wait 10 secs |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1356 | */ |
Sumant Patro | b274cab | 2006-10-03 12:52:12 -0700 | [diff] [blame] | 1357 | instance->instancet->disable_intr(instance->reg_set); |
Sumant Patro | e3bbff9 | 2006-10-03 12:28:49 -0700 | [diff] [blame] | 1358 | writel(MFI_RESET_FLAGS, &instance->reg_set->inbound_doorbell); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1359 | |
| 1360 | max_wait = 10; |
| 1361 | cur_state = MFI_STATE_OPERATIONAL; |
| 1362 | break; |
| 1363 | |
| 1364 | case MFI_STATE_UNDEFINED: |
| 1365 | /* |
| 1366 | * This state should not last for more than 2 seconds |
| 1367 | */ |
| 1368 | max_wait = 2; |
| 1369 | cur_state = MFI_STATE_UNDEFINED; |
| 1370 | break; |
| 1371 | |
| 1372 | case MFI_STATE_BB_INIT: |
| 1373 | max_wait = 2; |
| 1374 | cur_state = MFI_STATE_BB_INIT; |
| 1375 | break; |
| 1376 | |
| 1377 | case MFI_STATE_FW_INIT: |
| 1378 | max_wait = 20; |
| 1379 | cur_state = MFI_STATE_FW_INIT; |
| 1380 | break; |
| 1381 | |
| 1382 | case MFI_STATE_FW_INIT_2: |
| 1383 | max_wait = 20; |
| 1384 | cur_state = MFI_STATE_FW_INIT_2; |
| 1385 | break; |
| 1386 | |
| 1387 | case MFI_STATE_DEVICE_SCAN: |
| 1388 | max_wait = 20; |
| 1389 | cur_state = MFI_STATE_DEVICE_SCAN; |
| 1390 | break; |
| 1391 | |
| 1392 | case MFI_STATE_FLUSH_CACHE: |
| 1393 | max_wait = 20; |
| 1394 | cur_state = MFI_STATE_FLUSH_CACHE; |
| 1395 | break; |
| 1396 | |
| 1397 | default: |
| 1398 | printk(KERN_DEBUG "megasas: Unknown state 0x%x\n", |
| 1399 | fw_state); |
| 1400 | return -ENODEV; |
| 1401 | } |
| 1402 | |
| 1403 | /* |
| 1404 | * The cur_state should not last for more than max_wait secs |
| 1405 | */ |
| 1406 | for (i = 0; i < (max_wait * 1000); i++) { |
Sumant Patro | 1341c93 | 2006-01-25 12:02:40 -0800 | [diff] [blame] | 1407 | fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) & |
| 1408 | MFI_STATE_MASK ; |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1409 | |
| 1410 | if (fw_state == cur_state) { |
| 1411 | msleep(1); |
| 1412 | } else |
| 1413 | break; |
| 1414 | } |
| 1415 | |
| 1416 | /* |
| 1417 | * Return error if fw_state hasn't changed after max_wait |
| 1418 | */ |
| 1419 | if (fw_state == cur_state) { |
| 1420 | printk(KERN_DEBUG "FW state [%d] hasn't changed " |
| 1421 | "in %d secs\n", fw_state, max_wait); |
| 1422 | return -ENODEV; |
| 1423 | } |
| 1424 | }; |
Sumant Patro | e3bbff9 | 2006-10-03 12:28:49 -0700 | [diff] [blame] | 1425 | printk(KERN_INFO "megasas: FW now in Ready state\n"); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1426 | |
| 1427 | return 0; |
| 1428 | } |
| 1429 | |
| 1430 | /** |
| 1431 | * megasas_teardown_frame_pool - Destroy the cmd frame DMA pool |
| 1432 | * @instance: Adapter soft state |
| 1433 | */ |
| 1434 | static void megasas_teardown_frame_pool(struct megasas_instance *instance) |
| 1435 | { |
| 1436 | int i; |
| 1437 | u32 max_cmd = instance->max_fw_cmds; |
| 1438 | struct megasas_cmd *cmd; |
| 1439 | |
| 1440 | if (!instance->frame_dma_pool) |
| 1441 | return; |
| 1442 | |
| 1443 | /* |
| 1444 | * Return all frames to pool |
| 1445 | */ |
| 1446 | for (i = 0; i < max_cmd; i++) { |
| 1447 | |
| 1448 | cmd = instance->cmd_list[i]; |
| 1449 | |
| 1450 | if (cmd->frame) |
| 1451 | pci_pool_free(instance->frame_dma_pool, cmd->frame, |
| 1452 | cmd->frame_phys_addr); |
| 1453 | |
| 1454 | if (cmd->sense) |
Sumant Patro | e3bbff9 | 2006-10-03 12:28:49 -0700 | [diff] [blame] | 1455 | pci_pool_free(instance->sense_dma_pool, cmd->sense, |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1456 | cmd->sense_phys_addr); |
| 1457 | } |
| 1458 | |
| 1459 | /* |
| 1460 | * Now destroy the pool itself |
| 1461 | */ |
| 1462 | pci_pool_destroy(instance->frame_dma_pool); |
| 1463 | pci_pool_destroy(instance->sense_dma_pool); |
| 1464 | |
| 1465 | instance->frame_dma_pool = NULL; |
| 1466 | instance->sense_dma_pool = NULL; |
| 1467 | } |
| 1468 | |
| 1469 | /** |
| 1470 | * megasas_create_frame_pool - Creates DMA pool for cmd frames |
| 1471 | * @instance: Adapter soft state |
| 1472 | * |
| 1473 | * Each command packet has an embedded DMA memory buffer that is used for |
| 1474 | * filling MFI frame and the SG list that immediately follows the frame. This |
| 1475 | * function creates those DMA memory buffers for each command packet by using |
| 1476 | * PCI pool facility. |
| 1477 | */ |
| 1478 | static int megasas_create_frame_pool(struct megasas_instance *instance) |
| 1479 | { |
| 1480 | int i; |
| 1481 | u32 max_cmd; |
| 1482 | u32 sge_sz; |
| 1483 | u32 sgl_sz; |
| 1484 | u32 total_sz; |
| 1485 | u32 frame_count; |
| 1486 | struct megasas_cmd *cmd; |
| 1487 | |
| 1488 | max_cmd = instance->max_fw_cmds; |
| 1489 | |
| 1490 | /* |
| 1491 | * Size of our frame is 64 bytes for MFI frame, followed by max SG |
| 1492 | * elements and finally SCSI_SENSE_BUFFERSIZE bytes for sense buffer |
| 1493 | */ |
| 1494 | sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) : |
| 1495 | sizeof(struct megasas_sge32); |
| 1496 | |
| 1497 | /* |
| 1498 | * Calculated the number of 64byte frames required for SGL |
| 1499 | */ |
| 1500 | sgl_sz = sge_sz * instance->max_num_sge; |
| 1501 | frame_count = (sgl_sz + MEGAMFI_FRAME_SIZE - 1) / MEGAMFI_FRAME_SIZE; |
| 1502 | |
| 1503 | /* |
| 1504 | * We need one extra frame for the MFI command |
| 1505 | */ |
| 1506 | frame_count++; |
| 1507 | |
| 1508 | total_sz = MEGAMFI_FRAME_SIZE * frame_count; |
| 1509 | /* |
| 1510 | * Use DMA pool facility provided by PCI layer |
| 1511 | */ |
| 1512 | instance->frame_dma_pool = pci_pool_create("megasas frame pool", |
| 1513 | instance->pdev, total_sz, 64, |
| 1514 | 0); |
| 1515 | |
| 1516 | if (!instance->frame_dma_pool) { |
| 1517 | printk(KERN_DEBUG "megasas: failed to setup frame pool\n"); |
| 1518 | return -ENOMEM; |
| 1519 | } |
| 1520 | |
| 1521 | instance->sense_dma_pool = pci_pool_create("megasas sense pool", |
| 1522 | instance->pdev, 128, 4, 0); |
| 1523 | |
| 1524 | if (!instance->sense_dma_pool) { |
| 1525 | printk(KERN_DEBUG "megasas: failed to setup sense pool\n"); |
| 1526 | |
| 1527 | pci_pool_destroy(instance->frame_dma_pool); |
| 1528 | instance->frame_dma_pool = NULL; |
| 1529 | |
| 1530 | return -ENOMEM; |
| 1531 | } |
| 1532 | |
| 1533 | /* |
| 1534 | * Allocate and attach a frame to each of the commands in cmd_list. |
| 1535 | * By making cmd->index as the context instead of the &cmd, we can |
| 1536 | * always use 32bit context regardless of the architecture |
| 1537 | */ |
| 1538 | for (i = 0; i < max_cmd; i++) { |
| 1539 | |
| 1540 | cmd = instance->cmd_list[i]; |
| 1541 | |
| 1542 | cmd->frame = pci_pool_alloc(instance->frame_dma_pool, |
| 1543 | GFP_KERNEL, &cmd->frame_phys_addr); |
| 1544 | |
| 1545 | cmd->sense = pci_pool_alloc(instance->sense_dma_pool, |
| 1546 | GFP_KERNEL, &cmd->sense_phys_addr); |
| 1547 | |
| 1548 | /* |
| 1549 | * megasas_teardown_frame_pool() takes care of freeing |
| 1550 | * whatever has been allocated |
| 1551 | */ |
| 1552 | if (!cmd->frame || !cmd->sense) { |
| 1553 | printk(KERN_DEBUG "megasas: pci_pool_alloc failed \n"); |
| 1554 | megasas_teardown_frame_pool(instance); |
| 1555 | return -ENOMEM; |
| 1556 | } |
| 1557 | |
| 1558 | cmd->frame->io.context = cmd->index; |
| 1559 | } |
| 1560 | |
| 1561 | return 0; |
| 1562 | } |
| 1563 | |
| 1564 | /** |
| 1565 | * megasas_free_cmds - Free all the cmds in the free cmd pool |
| 1566 | * @instance: Adapter soft state |
| 1567 | */ |
| 1568 | static void megasas_free_cmds(struct megasas_instance *instance) |
| 1569 | { |
| 1570 | int i; |
| 1571 | /* First free the MFI frame pool */ |
| 1572 | megasas_teardown_frame_pool(instance); |
| 1573 | |
| 1574 | /* Free all the commands in the cmd_list */ |
| 1575 | for (i = 0; i < instance->max_fw_cmds; i++) |
| 1576 | kfree(instance->cmd_list[i]); |
| 1577 | |
| 1578 | /* Free the cmd_list buffer itself */ |
| 1579 | kfree(instance->cmd_list); |
| 1580 | instance->cmd_list = NULL; |
| 1581 | |
| 1582 | INIT_LIST_HEAD(&instance->cmd_pool); |
| 1583 | } |
| 1584 | |
| 1585 | /** |
| 1586 | * megasas_alloc_cmds - Allocates the command packets |
| 1587 | * @instance: Adapter soft state |
| 1588 | * |
| 1589 | * Each command that is issued to the FW, whether IO commands from the OS or |
| 1590 | * internal commands like IOCTLs, are wrapped in local data structure called |
| 1591 | * megasas_cmd. The frame embedded in this megasas_cmd is actually issued to |
| 1592 | * the FW. |
| 1593 | * |
| 1594 | * Each frame has a 32-bit field called context (tag). This context is used |
| 1595 | * to get back the megasas_cmd from the frame when a frame gets completed in |
| 1596 | * the ISR. Typically the address of the megasas_cmd itself would be used as |
| 1597 | * the context. But we wanted to keep the differences between 32 and 64 bit |
| 1598 | * systems to the mininum. We always use 32 bit integers for the context. In |
| 1599 | * this driver, the 32 bit values are the indices into an array cmd_list. |
| 1600 | * This array is used only to look up the megasas_cmd given the context. The |
| 1601 | * free commands themselves are maintained in a linked list called cmd_pool. |
| 1602 | */ |
| 1603 | static int megasas_alloc_cmds(struct megasas_instance *instance) |
| 1604 | { |
| 1605 | int i; |
| 1606 | int j; |
| 1607 | u32 max_cmd; |
| 1608 | struct megasas_cmd *cmd; |
| 1609 | |
| 1610 | max_cmd = instance->max_fw_cmds; |
| 1611 | |
| 1612 | /* |
| 1613 | * instance->cmd_list is an array of struct megasas_cmd pointers. |
| 1614 | * Allocate the dynamic array first and then allocate individual |
| 1615 | * commands. |
| 1616 | */ |
| 1617 | instance->cmd_list = kmalloc(sizeof(struct megasas_cmd *) * max_cmd, |
| 1618 | GFP_KERNEL); |
| 1619 | |
| 1620 | if (!instance->cmd_list) { |
| 1621 | printk(KERN_DEBUG "megasas: out of memory\n"); |
| 1622 | return -ENOMEM; |
| 1623 | } |
| 1624 | |
| 1625 | memset(instance->cmd_list, 0, sizeof(struct megasas_cmd *) * max_cmd); |
| 1626 | |
| 1627 | for (i = 0; i < max_cmd; i++) { |
| 1628 | instance->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd), |
| 1629 | GFP_KERNEL); |
| 1630 | |
| 1631 | if (!instance->cmd_list[i]) { |
| 1632 | |
| 1633 | for (j = 0; j < i; j++) |
| 1634 | kfree(instance->cmd_list[j]); |
| 1635 | |
| 1636 | kfree(instance->cmd_list); |
| 1637 | instance->cmd_list = NULL; |
| 1638 | |
| 1639 | return -ENOMEM; |
| 1640 | } |
| 1641 | } |
| 1642 | |
| 1643 | /* |
| 1644 | * Add all the commands to command pool (instance->cmd_pool) |
| 1645 | */ |
| 1646 | for (i = 0; i < max_cmd; i++) { |
| 1647 | cmd = instance->cmd_list[i]; |
| 1648 | memset(cmd, 0, sizeof(struct megasas_cmd)); |
| 1649 | cmd->index = i; |
| 1650 | cmd->instance = instance; |
| 1651 | |
| 1652 | list_add_tail(&cmd->list, &instance->cmd_pool); |
| 1653 | } |
| 1654 | |
| 1655 | /* |
| 1656 | * Create a frame pool and assign one frame to each cmd |
| 1657 | */ |
| 1658 | if (megasas_create_frame_pool(instance)) { |
| 1659 | printk(KERN_DEBUG "megasas: Error creating frame DMA pool\n"); |
| 1660 | megasas_free_cmds(instance); |
| 1661 | } |
| 1662 | |
| 1663 | return 0; |
| 1664 | } |
| 1665 | |
| 1666 | /** |
| 1667 | * megasas_get_controller_info - Returns FW's controller structure |
| 1668 | * @instance: Adapter soft state |
| 1669 | * @ctrl_info: Controller information structure |
| 1670 | * |
| 1671 | * Issues an internal command (DCMD) to get the FW's controller structure. |
| 1672 | * This information is mainly used to find out the maximum IO transfer per |
| 1673 | * command supported by the FW. |
| 1674 | */ |
| 1675 | static int |
| 1676 | megasas_get_ctrl_info(struct megasas_instance *instance, |
| 1677 | struct megasas_ctrl_info *ctrl_info) |
| 1678 | { |
| 1679 | int ret = 0; |
| 1680 | struct megasas_cmd *cmd; |
| 1681 | struct megasas_dcmd_frame *dcmd; |
| 1682 | struct megasas_ctrl_info *ci; |
| 1683 | dma_addr_t ci_h = 0; |
| 1684 | |
| 1685 | cmd = megasas_get_cmd(instance); |
| 1686 | |
| 1687 | if (!cmd) { |
| 1688 | printk(KERN_DEBUG "megasas: Failed to get a free cmd\n"); |
| 1689 | return -ENOMEM; |
| 1690 | } |
| 1691 | |
| 1692 | dcmd = &cmd->frame->dcmd; |
| 1693 | |
| 1694 | ci = pci_alloc_consistent(instance->pdev, |
| 1695 | sizeof(struct megasas_ctrl_info), &ci_h); |
| 1696 | |
| 1697 | if (!ci) { |
| 1698 | printk(KERN_DEBUG "Failed to alloc mem for ctrl info\n"); |
| 1699 | megasas_return_cmd(instance, cmd); |
| 1700 | return -ENOMEM; |
| 1701 | } |
| 1702 | |
| 1703 | memset(ci, 0, sizeof(*ci)); |
| 1704 | memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE); |
| 1705 | |
| 1706 | dcmd->cmd = MFI_CMD_DCMD; |
| 1707 | dcmd->cmd_status = 0xFF; |
| 1708 | dcmd->sge_count = 1; |
| 1709 | dcmd->flags = MFI_FRAME_DIR_READ; |
| 1710 | dcmd->timeout = 0; |
| 1711 | dcmd->data_xfer_len = sizeof(struct megasas_ctrl_info); |
| 1712 | dcmd->opcode = MR_DCMD_CTRL_GET_INFO; |
| 1713 | dcmd->sgl.sge32[0].phys_addr = ci_h; |
| 1714 | dcmd->sgl.sge32[0].length = sizeof(struct megasas_ctrl_info); |
| 1715 | |
| 1716 | if (!megasas_issue_polled(instance, cmd)) { |
| 1717 | ret = 0; |
| 1718 | memcpy(ctrl_info, ci, sizeof(struct megasas_ctrl_info)); |
| 1719 | } else { |
| 1720 | ret = -1; |
| 1721 | } |
| 1722 | |
| 1723 | pci_free_consistent(instance->pdev, sizeof(struct megasas_ctrl_info), |
| 1724 | ci, ci_h); |
| 1725 | |
| 1726 | megasas_return_cmd(instance, cmd); |
| 1727 | return ret; |
| 1728 | } |
| 1729 | |
| 1730 | /** |
Sumant Patro | 5d018ad | 2006-10-03 13:13:18 -0700 | [diff] [blame] | 1731 | * megasas_complete_cmd_dpc - Returns FW's controller structure |
| 1732 | * @instance_addr: Address of adapter soft state |
| 1733 | * |
| 1734 | * Tasklet to complete cmds |
| 1735 | */ |
| 1736 | void megasas_complete_cmd_dpc(unsigned long instance_addr) |
| 1737 | { |
| 1738 | u32 producer; |
| 1739 | u32 consumer; |
| 1740 | u32 context; |
| 1741 | struct megasas_cmd *cmd; |
| 1742 | struct megasas_instance *instance = (struct megasas_instance *)instance_addr; |
| 1743 | |
| 1744 | producer = *instance->producer; |
| 1745 | consumer = *instance->consumer; |
| 1746 | |
| 1747 | while (consumer != producer) { |
| 1748 | context = instance->reply_queue[consumer]; |
| 1749 | |
| 1750 | cmd = instance->cmd_list[context]; |
| 1751 | |
| 1752 | megasas_complete_cmd(instance, cmd, DID_OK); |
| 1753 | |
| 1754 | consumer++; |
| 1755 | if (consumer == (instance->max_fw_cmds + 1)) { |
| 1756 | consumer = 0; |
| 1757 | } |
| 1758 | } |
| 1759 | |
| 1760 | *instance->consumer = producer; |
| 1761 | } |
| 1762 | |
| 1763 | /** |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1764 | * megasas_init_mfi - Initializes the FW |
| 1765 | * @instance: Adapter soft state |
| 1766 | * |
| 1767 | * This is the main function for initializing MFI firmware. |
| 1768 | */ |
| 1769 | static int megasas_init_mfi(struct megasas_instance *instance) |
| 1770 | { |
| 1771 | u32 context_sz; |
| 1772 | u32 reply_q_sz; |
| 1773 | u32 max_sectors_1; |
| 1774 | u32 max_sectors_2; |
| 1775 | struct megasas_register_set __iomem *reg_set; |
| 1776 | |
| 1777 | struct megasas_cmd *cmd; |
| 1778 | struct megasas_ctrl_info *ctrl_info; |
| 1779 | |
| 1780 | struct megasas_init_frame *init_frame; |
| 1781 | struct megasas_init_queue_info *initq_info; |
| 1782 | dma_addr_t init_frame_h; |
| 1783 | dma_addr_t initq_info_h; |
| 1784 | |
| 1785 | /* |
| 1786 | * Map the message registers |
| 1787 | */ |
| 1788 | instance->base_addr = pci_resource_start(instance->pdev, 0); |
| 1789 | |
| 1790 | if (pci_request_regions(instance->pdev, "megasas: LSI Logic")) { |
| 1791 | printk(KERN_DEBUG "megasas: IO memory region busy!\n"); |
| 1792 | return -EBUSY; |
| 1793 | } |
| 1794 | |
| 1795 | instance->reg_set = ioremap_nocache(instance->base_addr, 8192); |
| 1796 | |
| 1797 | if (!instance->reg_set) { |
| 1798 | printk(KERN_DEBUG "megasas: Failed to map IO mem\n"); |
| 1799 | goto fail_ioremap; |
| 1800 | } |
| 1801 | |
| 1802 | reg_set = instance->reg_set; |
| 1803 | |
Sumant Patro | f9876f0 | 2006-02-03 15:34:35 -0800 | [diff] [blame] | 1804 | switch(instance->pdev->device) |
| 1805 | { |
| 1806 | case PCI_DEVICE_ID_LSI_SAS1078R: |
| 1807 | instance->instancet = &megasas_instance_template_ppc; |
| 1808 | break; |
| 1809 | case PCI_DEVICE_ID_LSI_SAS1064R: |
| 1810 | case PCI_DEVICE_ID_DELL_PERC5: |
| 1811 | default: |
| 1812 | instance->instancet = &megasas_instance_template_xscale; |
| 1813 | break; |
| 1814 | } |
Sumant Patro | 1341c93 | 2006-01-25 12:02:40 -0800 | [diff] [blame] | 1815 | |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1816 | /* |
| 1817 | * We expect the FW state to be READY |
| 1818 | */ |
Sumant Patro | 1341c93 | 2006-01-25 12:02:40 -0800 | [diff] [blame] | 1819 | if (megasas_transition_to_ready(instance)) |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1820 | goto fail_ready_state; |
| 1821 | |
| 1822 | /* |
| 1823 | * Get various operational parameters from status register |
| 1824 | */ |
Sumant Patro | 1341c93 | 2006-01-25 12:02:40 -0800 | [diff] [blame] | 1825 | instance->max_fw_cmds = instance->instancet->read_fw_status_reg(reg_set) & 0x00FFFF; |
Sumant Patro | e3bbff9 | 2006-10-03 12:28:49 -0700 | [diff] [blame] | 1826 | /* |
| 1827 | * Reduce the max supported cmds by 1. This is to ensure that the |
| 1828 | * reply_q_sz (1 more than the max cmd that driver may send) |
| 1829 | * does not exceed max cmds that the FW can support |
| 1830 | */ |
| 1831 | instance->max_fw_cmds = instance->max_fw_cmds-1; |
Sumant Patro | 1341c93 | 2006-01-25 12:02:40 -0800 | [diff] [blame] | 1832 | instance->max_num_sge = (instance->instancet->read_fw_status_reg(reg_set) & 0xFF0000) >> |
| 1833 | 0x10; |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1834 | /* |
| 1835 | * Create a pool of commands |
| 1836 | */ |
| 1837 | if (megasas_alloc_cmds(instance)) |
| 1838 | goto fail_alloc_cmds; |
| 1839 | |
| 1840 | /* |
| 1841 | * Allocate memory for reply queue. Length of reply queue should |
| 1842 | * be _one_ more than the maximum commands handled by the firmware. |
| 1843 | * |
| 1844 | * Note: When FW completes commands, it places corresponding contex |
| 1845 | * values in this circular reply queue. This circular queue is a fairly |
| 1846 | * typical producer-consumer queue. FW is the producer (of completed |
| 1847 | * commands) and the driver is the consumer. |
| 1848 | */ |
| 1849 | context_sz = sizeof(u32); |
| 1850 | reply_q_sz = context_sz * (instance->max_fw_cmds + 1); |
| 1851 | |
| 1852 | instance->reply_queue = pci_alloc_consistent(instance->pdev, |
| 1853 | reply_q_sz, |
| 1854 | &instance->reply_queue_h); |
| 1855 | |
| 1856 | if (!instance->reply_queue) { |
| 1857 | printk(KERN_DEBUG "megasas: Out of DMA mem for reply queue\n"); |
| 1858 | goto fail_reply_queue; |
| 1859 | } |
| 1860 | |
| 1861 | /* |
| 1862 | * Prepare a init frame. Note the init frame points to queue info |
| 1863 | * structure. Each frame has SGL allocated after first 64 bytes. For |
| 1864 | * this frame - since we don't need any SGL - we use SGL's space as |
| 1865 | * queue info structure |
| 1866 | * |
| 1867 | * We will not get a NULL command below. We just created the pool. |
| 1868 | */ |
| 1869 | cmd = megasas_get_cmd(instance); |
| 1870 | |
| 1871 | init_frame = (struct megasas_init_frame *)cmd->frame; |
| 1872 | initq_info = (struct megasas_init_queue_info *) |
| 1873 | ((unsigned long)init_frame + 64); |
| 1874 | |
| 1875 | init_frame_h = cmd->frame_phys_addr; |
| 1876 | initq_info_h = init_frame_h + 64; |
| 1877 | |
| 1878 | memset(init_frame, 0, MEGAMFI_FRAME_SIZE); |
| 1879 | memset(initq_info, 0, sizeof(struct megasas_init_queue_info)); |
| 1880 | |
| 1881 | initq_info->reply_queue_entries = instance->max_fw_cmds + 1; |
| 1882 | initq_info->reply_queue_start_phys_addr_lo = instance->reply_queue_h; |
| 1883 | |
| 1884 | initq_info->producer_index_phys_addr_lo = instance->producer_h; |
| 1885 | initq_info->consumer_index_phys_addr_lo = instance->consumer_h; |
| 1886 | |
| 1887 | init_frame->cmd = MFI_CMD_INIT; |
| 1888 | init_frame->cmd_status = 0xFF; |
| 1889 | init_frame->queue_info_new_phys_addr_lo = initq_info_h; |
| 1890 | |
| 1891 | init_frame->data_xfer_len = sizeof(struct megasas_init_queue_info); |
| 1892 | |
| 1893 | /* |
Sumant Patro | 0e98936 | 2006-06-20 15:32:37 -0700 | [diff] [blame] | 1894 | * disable the intr before firing the init frame to FW |
| 1895 | */ |
Sumant Patro | b274cab | 2006-10-03 12:52:12 -0700 | [diff] [blame] | 1896 | instance->instancet->disable_intr(instance->reg_set); |
Sumant Patro | 0e98936 | 2006-06-20 15:32:37 -0700 | [diff] [blame] | 1897 | |
| 1898 | /* |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1899 | * Issue the init frame in polled mode |
| 1900 | */ |
| 1901 | if (megasas_issue_polled(instance, cmd)) { |
| 1902 | printk(KERN_DEBUG "megasas: Failed to init firmware\n"); |
| 1903 | goto fail_fw_init; |
| 1904 | } |
| 1905 | |
| 1906 | megasas_return_cmd(instance, cmd); |
| 1907 | |
| 1908 | ctrl_info = kmalloc(sizeof(struct megasas_ctrl_info), GFP_KERNEL); |
| 1909 | |
| 1910 | /* |
| 1911 | * Compute the max allowed sectors per IO: The controller info has two |
| 1912 | * limits on max sectors. Driver should use the minimum of these two. |
| 1913 | * |
| 1914 | * 1 << stripe_sz_ops.min = max sectors per strip |
| 1915 | * |
| 1916 | * Note that older firmwares ( < FW ver 30) didn't report information |
| 1917 | * to calculate max_sectors_1. So the number ended up as zero always. |
| 1918 | */ |
| 1919 | if (ctrl_info && !megasas_get_ctrl_info(instance, ctrl_info)) { |
| 1920 | |
| 1921 | max_sectors_1 = (1 << ctrl_info->stripe_sz_ops.min) * |
| 1922 | ctrl_info->max_strips_per_io; |
| 1923 | max_sectors_2 = ctrl_info->max_request_size; |
| 1924 | |
| 1925 | instance->max_sectors_per_req = (max_sectors_1 < max_sectors_2) |
| 1926 | ? max_sectors_1 : max_sectors_2; |
| 1927 | } else |
| 1928 | instance->max_sectors_per_req = instance->max_num_sge * |
| 1929 | PAGE_SIZE / 512; |
| 1930 | |
| 1931 | kfree(ctrl_info); |
| 1932 | |
Sumant Patro | 5d018ad | 2006-10-03 13:13:18 -0700 | [diff] [blame] | 1933 | /* |
| 1934 | * Setup tasklet for cmd completion |
| 1935 | */ |
| 1936 | |
| 1937 | tasklet_init(&instance->isr_tasklet, megasas_complete_cmd_dpc, |
| 1938 | (unsigned long)instance); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 1939 | return 0; |
| 1940 | |
| 1941 | fail_fw_init: |
| 1942 | megasas_return_cmd(instance, cmd); |
| 1943 | |
| 1944 | pci_free_consistent(instance->pdev, reply_q_sz, |
| 1945 | instance->reply_queue, instance->reply_queue_h); |
| 1946 | fail_reply_queue: |
| 1947 | megasas_free_cmds(instance); |
| 1948 | |
| 1949 | fail_alloc_cmds: |
| 1950 | fail_ready_state: |
| 1951 | iounmap(instance->reg_set); |
| 1952 | |
| 1953 | fail_ioremap: |
| 1954 | pci_release_regions(instance->pdev); |
| 1955 | |
| 1956 | return -EINVAL; |
| 1957 | } |
| 1958 | |
| 1959 | /** |
| 1960 | * megasas_release_mfi - Reverses the FW initialization |
| 1961 | * @intance: Adapter soft state |
| 1962 | */ |
| 1963 | static void megasas_release_mfi(struct megasas_instance *instance) |
| 1964 | { |
| 1965 | u32 reply_q_sz = sizeof(u32) * (instance->max_fw_cmds + 1); |
| 1966 | |
| 1967 | pci_free_consistent(instance->pdev, reply_q_sz, |
| 1968 | instance->reply_queue, instance->reply_queue_h); |
| 1969 | |
| 1970 | megasas_free_cmds(instance); |
| 1971 | |
| 1972 | iounmap(instance->reg_set); |
| 1973 | |
| 1974 | pci_release_regions(instance->pdev); |
| 1975 | } |
| 1976 | |
| 1977 | /** |
| 1978 | * megasas_get_seq_num - Gets latest event sequence numbers |
| 1979 | * @instance: Adapter soft state |
| 1980 | * @eli: FW event log sequence numbers information |
| 1981 | * |
| 1982 | * FW maintains a log of all events in a non-volatile area. Upper layers would |
| 1983 | * usually find out the latest sequence number of the events, the seq number at |
| 1984 | * the boot etc. They would "read" all the events below the latest seq number |
| 1985 | * by issuing a direct fw cmd (DCMD). For the future events (beyond latest seq |
| 1986 | * number), they would subsribe to AEN (asynchronous event notification) and |
| 1987 | * wait for the events to happen. |
| 1988 | */ |
| 1989 | static int |
| 1990 | megasas_get_seq_num(struct megasas_instance *instance, |
| 1991 | struct megasas_evt_log_info *eli) |
| 1992 | { |
| 1993 | struct megasas_cmd *cmd; |
| 1994 | struct megasas_dcmd_frame *dcmd; |
| 1995 | struct megasas_evt_log_info *el_info; |
| 1996 | dma_addr_t el_info_h = 0; |
| 1997 | |
| 1998 | cmd = megasas_get_cmd(instance); |
| 1999 | |
| 2000 | if (!cmd) { |
| 2001 | return -ENOMEM; |
| 2002 | } |
| 2003 | |
| 2004 | dcmd = &cmd->frame->dcmd; |
| 2005 | el_info = pci_alloc_consistent(instance->pdev, |
| 2006 | sizeof(struct megasas_evt_log_info), |
| 2007 | &el_info_h); |
| 2008 | |
| 2009 | if (!el_info) { |
| 2010 | megasas_return_cmd(instance, cmd); |
| 2011 | return -ENOMEM; |
| 2012 | } |
| 2013 | |
| 2014 | memset(el_info, 0, sizeof(*el_info)); |
| 2015 | memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE); |
| 2016 | |
| 2017 | dcmd->cmd = MFI_CMD_DCMD; |
| 2018 | dcmd->cmd_status = 0x0; |
| 2019 | dcmd->sge_count = 1; |
| 2020 | dcmd->flags = MFI_FRAME_DIR_READ; |
| 2021 | dcmd->timeout = 0; |
| 2022 | dcmd->data_xfer_len = sizeof(struct megasas_evt_log_info); |
| 2023 | dcmd->opcode = MR_DCMD_CTRL_EVENT_GET_INFO; |
| 2024 | dcmd->sgl.sge32[0].phys_addr = el_info_h; |
| 2025 | dcmd->sgl.sge32[0].length = sizeof(struct megasas_evt_log_info); |
| 2026 | |
| 2027 | megasas_issue_blocked_cmd(instance, cmd); |
| 2028 | |
| 2029 | /* |
| 2030 | * Copy the data back into callers buffer |
| 2031 | */ |
| 2032 | memcpy(eli, el_info, sizeof(struct megasas_evt_log_info)); |
| 2033 | |
| 2034 | pci_free_consistent(instance->pdev, sizeof(struct megasas_evt_log_info), |
| 2035 | el_info, el_info_h); |
| 2036 | |
| 2037 | megasas_return_cmd(instance, cmd); |
| 2038 | |
| 2039 | return 0; |
| 2040 | } |
| 2041 | |
| 2042 | /** |
| 2043 | * megasas_register_aen - Registers for asynchronous event notification |
| 2044 | * @instance: Adapter soft state |
| 2045 | * @seq_num: The starting sequence number |
| 2046 | * @class_locale: Class of the event |
| 2047 | * |
| 2048 | * This function subscribes for AEN for events beyond the @seq_num. It requests |
| 2049 | * to be notified if and only if the event is of type @class_locale |
| 2050 | */ |
| 2051 | static int |
| 2052 | megasas_register_aen(struct megasas_instance *instance, u32 seq_num, |
| 2053 | u32 class_locale_word) |
| 2054 | { |
| 2055 | int ret_val; |
| 2056 | struct megasas_cmd *cmd; |
| 2057 | struct megasas_dcmd_frame *dcmd; |
| 2058 | union megasas_evt_class_locale curr_aen; |
| 2059 | union megasas_evt_class_locale prev_aen; |
| 2060 | |
| 2061 | /* |
| 2062 | * If there an AEN pending already (aen_cmd), check if the |
| 2063 | * class_locale of that pending AEN is inclusive of the new |
| 2064 | * AEN request we currently have. If it is, then we don't have |
| 2065 | * to do anything. In other words, whichever events the current |
| 2066 | * AEN request is subscribing to, have already been subscribed |
| 2067 | * to. |
| 2068 | * |
| 2069 | * If the old_cmd is _not_ inclusive, then we have to abort |
| 2070 | * that command, form a class_locale that is superset of both |
| 2071 | * old and current and re-issue to the FW |
| 2072 | */ |
| 2073 | |
| 2074 | curr_aen.word = class_locale_word; |
| 2075 | |
| 2076 | if (instance->aen_cmd) { |
| 2077 | |
| 2078 | prev_aen.word = instance->aen_cmd->frame->dcmd.mbox.w[1]; |
| 2079 | |
| 2080 | /* |
| 2081 | * A class whose enum value is smaller is inclusive of all |
| 2082 | * higher values. If a PROGRESS (= -1) was previously |
| 2083 | * registered, then a new registration requests for higher |
| 2084 | * classes need not be sent to FW. They are automatically |
| 2085 | * included. |
| 2086 | * |
| 2087 | * Locale numbers don't have such hierarchy. They are bitmap |
| 2088 | * values |
| 2089 | */ |
| 2090 | if ((prev_aen.members.class <= curr_aen.members.class) && |
| 2091 | !((prev_aen.members.locale & curr_aen.members.locale) ^ |
| 2092 | curr_aen.members.locale)) { |
| 2093 | /* |
| 2094 | * Previously issued event registration includes |
| 2095 | * current request. Nothing to do. |
| 2096 | */ |
| 2097 | return 0; |
| 2098 | } else { |
| 2099 | curr_aen.members.locale |= prev_aen.members.locale; |
| 2100 | |
| 2101 | if (prev_aen.members.class < curr_aen.members.class) |
| 2102 | curr_aen.members.class = prev_aen.members.class; |
| 2103 | |
| 2104 | instance->aen_cmd->abort_aen = 1; |
| 2105 | ret_val = megasas_issue_blocked_abort_cmd(instance, |
| 2106 | instance-> |
| 2107 | aen_cmd); |
| 2108 | |
| 2109 | if (ret_val) { |
| 2110 | printk(KERN_DEBUG "megasas: Failed to abort " |
| 2111 | "previous AEN command\n"); |
| 2112 | return ret_val; |
| 2113 | } |
| 2114 | } |
| 2115 | } |
| 2116 | |
| 2117 | cmd = megasas_get_cmd(instance); |
| 2118 | |
| 2119 | if (!cmd) |
| 2120 | return -ENOMEM; |
| 2121 | |
| 2122 | dcmd = &cmd->frame->dcmd; |
| 2123 | |
| 2124 | memset(instance->evt_detail, 0, sizeof(struct megasas_evt_detail)); |
| 2125 | |
| 2126 | /* |
| 2127 | * Prepare DCMD for aen registration |
| 2128 | */ |
| 2129 | memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE); |
| 2130 | |
| 2131 | dcmd->cmd = MFI_CMD_DCMD; |
| 2132 | dcmd->cmd_status = 0x0; |
| 2133 | dcmd->sge_count = 1; |
| 2134 | dcmd->flags = MFI_FRAME_DIR_READ; |
| 2135 | dcmd->timeout = 0; |
| 2136 | dcmd->data_xfer_len = sizeof(struct megasas_evt_detail); |
| 2137 | dcmd->opcode = MR_DCMD_CTRL_EVENT_WAIT; |
| 2138 | dcmd->mbox.w[0] = seq_num; |
| 2139 | dcmd->mbox.w[1] = curr_aen.word; |
| 2140 | dcmd->sgl.sge32[0].phys_addr = (u32) instance->evt_detail_h; |
| 2141 | dcmd->sgl.sge32[0].length = sizeof(struct megasas_evt_detail); |
| 2142 | |
| 2143 | /* |
| 2144 | * Store reference to the cmd used to register for AEN. When an |
| 2145 | * application wants us to register for AEN, we have to abort this |
| 2146 | * cmd and re-register with a new EVENT LOCALE supplied by that app |
| 2147 | */ |
| 2148 | instance->aen_cmd = cmd; |
| 2149 | |
| 2150 | /* |
| 2151 | * Issue the aen registration frame |
| 2152 | */ |
Sumant Patro | 1341c93 | 2006-01-25 12:02:40 -0800 | [diff] [blame] | 2153 | instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 2154 | |
| 2155 | return 0; |
| 2156 | } |
| 2157 | |
| 2158 | /** |
| 2159 | * megasas_start_aen - Subscribes to AEN during driver load time |
| 2160 | * @instance: Adapter soft state |
| 2161 | */ |
| 2162 | static int megasas_start_aen(struct megasas_instance *instance) |
| 2163 | { |
| 2164 | struct megasas_evt_log_info eli; |
| 2165 | union megasas_evt_class_locale class_locale; |
| 2166 | |
| 2167 | /* |
| 2168 | * Get the latest sequence number from FW |
| 2169 | */ |
| 2170 | memset(&eli, 0, sizeof(eli)); |
| 2171 | |
| 2172 | if (megasas_get_seq_num(instance, &eli)) |
| 2173 | return -1; |
| 2174 | |
| 2175 | /* |
| 2176 | * Register AEN with FW for latest sequence number plus 1 |
| 2177 | */ |
| 2178 | class_locale.members.reserved = 0; |
| 2179 | class_locale.members.locale = MR_EVT_LOCALE_ALL; |
| 2180 | class_locale.members.class = MR_EVT_CLASS_DEBUG; |
| 2181 | |
| 2182 | return megasas_register_aen(instance, eli.newest_seq_num + 1, |
| 2183 | class_locale.word); |
| 2184 | } |
| 2185 | |
| 2186 | /** |
| 2187 | * megasas_io_attach - Attaches this driver to SCSI mid-layer |
| 2188 | * @instance: Adapter soft state |
| 2189 | */ |
| 2190 | static int megasas_io_attach(struct megasas_instance *instance) |
| 2191 | { |
| 2192 | struct Scsi_Host *host = instance->host; |
| 2193 | |
| 2194 | /* |
| 2195 | * Export parameters required by SCSI mid-layer |
| 2196 | */ |
| 2197 | host->irq = instance->pdev->irq; |
| 2198 | host->unique_id = instance->unique_id; |
| 2199 | host->can_queue = instance->max_fw_cmds - MEGASAS_INT_CMDS; |
| 2200 | host->this_id = instance->init_id; |
| 2201 | host->sg_tablesize = instance->max_num_sge; |
| 2202 | host->max_sectors = instance->max_sectors_per_req; |
| 2203 | host->cmd_per_lun = 128; |
| 2204 | host->max_channel = MEGASAS_MAX_CHANNELS - 1; |
| 2205 | host->max_id = MEGASAS_MAX_DEV_PER_CHANNEL; |
| 2206 | host->max_lun = MEGASAS_MAX_LUN; |
Joshua Giles | 122da30 | 2006-02-03 15:34:17 -0800 | [diff] [blame] | 2207 | host->max_cmd_len = 16; |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 2208 | |
| 2209 | /* |
| 2210 | * Notify the mid-layer about the new controller |
| 2211 | */ |
| 2212 | if (scsi_add_host(host, &instance->pdev->dev)) { |
| 2213 | printk(KERN_DEBUG "megasas: scsi_add_host failed\n"); |
| 2214 | return -ENODEV; |
| 2215 | } |
| 2216 | |
| 2217 | /* |
| 2218 | * Trigger SCSI to scan our drives |
| 2219 | */ |
| 2220 | scsi_scan_host(host); |
| 2221 | return 0; |
| 2222 | } |
| 2223 | |
| 2224 | /** |
| 2225 | * megasas_probe_one - PCI hotplug entry point |
| 2226 | * @pdev: PCI device structure |
| 2227 | * @id: PCI ids of supported hotplugged adapter |
| 2228 | */ |
| 2229 | static int __devinit |
| 2230 | megasas_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) |
| 2231 | { |
| 2232 | int rval; |
| 2233 | struct Scsi_Host *host; |
| 2234 | struct megasas_instance *instance; |
| 2235 | |
| 2236 | /* |
| 2237 | * Announce PCI information |
| 2238 | */ |
| 2239 | printk(KERN_INFO "megasas: %#4.04x:%#4.04x:%#4.04x:%#4.04x: ", |
| 2240 | pdev->vendor, pdev->device, pdev->subsystem_vendor, |
| 2241 | pdev->subsystem_device); |
| 2242 | |
| 2243 | printk("bus %d:slot %d:func %d\n", |
| 2244 | pdev->bus->number, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)); |
| 2245 | |
| 2246 | /* |
| 2247 | * PCI prepping: enable device set bus mastering and dma mask |
| 2248 | */ |
| 2249 | rval = pci_enable_device(pdev); |
| 2250 | |
| 2251 | if (rval) { |
| 2252 | return rval; |
| 2253 | } |
| 2254 | |
| 2255 | pci_set_master(pdev); |
| 2256 | |
| 2257 | /* |
| 2258 | * All our contollers are capable of performing 64-bit DMA |
| 2259 | */ |
| 2260 | if (IS_DMA64) { |
| 2261 | if (pci_set_dma_mask(pdev, DMA_64BIT_MASK) != 0) { |
| 2262 | |
| 2263 | if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0) |
| 2264 | goto fail_set_dma_mask; |
| 2265 | } |
| 2266 | } else { |
| 2267 | if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0) |
| 2268 | goto fail_set_dma_mask; |
| 2269 | } |
| 2270 | |
| 2271 | host = scsi_host_alloc(&megasas_template, |
| 2272 | sizeof(struct megasas_instance)); |
| 2273 | |
| 2274 | if (!host) { |
| 2275 | printk(KERN_DEBUG "megasas: scsi_host_alloc failed\n"); |
| 2276 | goto fail_alloc_instance; |
| 2277 | } |
| 2278 | |
| 2279 | instance = (struct megasas_instance *)host->hostdata; |
| 2280 | memset(instance, 0, sizeof(*instance)); |
| 2281 | |
| 2282 | instance->producer = pci_alloc_consistent(pdev, sizeof(u32), |
| 2283 | &instance->producer_h); |
| 2284 | instance->consumer = pci_alloc_consistent(pdev, sizeof(u32), |
| 2285 | &instance->consumer_h); |
| 2286 | |
| 2287 | if (!instance->producer || !instance->consumer) { |
| 2288 | printk(KERN_DEBUG "megasas: Failed to allocate memory for " |
| 2289 | "producer, consumer\n"); |
| 2290 | goto fail_alloc_dma_buf; |
| 2291 | } |
| 2292 | |
| 2293 | *instance->producer = 0; |
| 2294 | *instance->consumer = 0; |
| 2295 | |
| 2296 | instance->evt_detail = pci_alloc_consistent(pdev, |
| 2297 | sizeof(struct |
| 2298 | megasas_evt_detail), |
| 2299 | &instance->evt_detail_h); |
| 2300 | |
| 2301 | if (!instance->evt_detail) { |
| 2302 | printk(KERN_DEBUG "megasas: Failed to allocate memory for " |
| 2303 | "event detail structure\n"); |
| 2304 | goto fail_alloc_dma_buf; |
| 2305 | } |
| 2306 | |
| 2307 | /* |
| 2308 | * Initialize locks and queues |
| 2309 | */ |
| 2310 | INIT_LIST_HEAD(&instance->cmd_pool); |
| 2311 | |
Sumant Patro | e4a082c | 2006-05-30 12:03:37 -0700 | [diff] [blame] | 2312 | atomic_set(&instance->fw_outstanding,0); |
| 2313 | |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 2314 | init_waitqueue_head(&instance->int_cmd_wait_q); |
| 2315 | init_waitqueue_head(&instance->abort_cmd_wait_q); |
| 2316 | |
| 2317 | spin_lock_init(&instance->cmd_pool_lock); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 2318 | |
| 2319 | sema_init(&instance->aen_mutex, 1); |
| 2320 | sema_init(&instance->ioctl_sem, MEGASAS_INT_CMDS); |
| 2321 | |
| 2322 | /* |
| 2323 | * Initialize PCI related and misc parameters |
| 2324 | */ |
| 2325 | instance->pdev = pdev; |
| 2326 | instance->host = host; |
| 2327 | instance->unique_id = pdev->bus->number << 8 | pdev->devfn; |
| 2328 | instance->init_id = MEGASAS_DEFAULT_INIT_ID; |
| 2329 | |
Sumant Patro | 658dced | 2006-10-03 13:09:14 -0700 | [diff] [blame] | 2330 | megasas_dbg_lvl = 0; |
| 2331 | |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 2332 | /* |
| 2333 | * Initialize MFI Firmware |
| 2334 | */ |
| 2335 | if (megasas_init_mfi(instance)) |
| 2336 | goto fail_init_mfi; |
| 2337 | |
| 2338 | /* |
| 2339 | * Register IRQ |
| 2340 | */ |
Thomas Gleixner | 1d6f359 | 2006-07-01 19:29:42 -0700 | [diff] [blame] | 2341 | if (request_irq(pdev->irq, megasas_isr, IRQF_SHARED, "megasas", instance)) { |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 2342 | printk(KERN_DEBUG "megasas: Failed to register IRQ\n"); |
| 2343 | goto fail_irq; |
| 2344 | } |
| 2345 | |
Sumant Patro | 1341c93 | 2006-01-25 12:02:40 -0800 | [diff] [blame] | 2346 | instance->instancet->enable_intr(instance->reg_set); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 2347 | |
| 2348 | /* |
| 2349 | * Store instance in PCI softstate |
| 2350 | */ |
| 2351 | pci_set_drvdata(pdev, instance); |
| 2352 | |
| 2353 | /* |
| 2354 | * Add this controller to megasas_mgmt_info structure so that it |
| 2355 | * can be exported to management applications |
| 2356 | */ |
| 2357 | megasas_mgmt_info.count++; |
| 2358 | megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = instance; |
| 2359 | megasas_mgmt_info.max_index++; |
| 2360 | |
| 2361 | /* |
| 2362 | * Initiate AEN (Asynchronous Event Notification) |
| 2363 | */ |
| 2364 | if (megasas_start_aen(instance)) { |
| 2365 | printk(KERN_DEBUG "megasas: start aen failed\n"); |
| 2366 | goto fail_start_aen; |
| 2367 | } |
| 2368 | |
| 2369 | /* |
| 2370 | * Register with SCSI mid-layer |
| 2371 | */ |
| 2372 | if (megasas_io_attach(instance)) |
| 2373 | goto fail_io_attach; |
| 2374 | |
| 2375 | return 0; |
| 2376 | |
| 2377 | fail_start_aen: |
| 2378 | fail_io_attach: |
| 2379 | megasas_mgmt_info.count--; |
| 2380 | megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = NULL; |
| 2381 | megasas_mgmt_info.max_index--; |
| 2382 | |
| 2383 | pci_set_drvdata(pdev, NULL); |
Sumant Patro | b274cab | 2006-10-03 12:52:12 -0700 | [diff] [blame] | 2384 | instance->instancet->disable_intr(instance->reg_set); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 2385 | free_irq(instance->pdev->irq, instance); |
| 2386 | |
| 2387 | megasas_release_mfi(instance); |
| 2388 | |
| 2389 | fail_irq: |
| 2390 | fail_init_mfi: |
| 2391 | fail_alloc_dma_buf: |
| 2392 | if (instance->evt_detail) |
| 2393 | pci_free_consistent(pdev, sizeof(struct megasas_evt_detail), |
| 2394 | instance->evt_detail, |
| 2395 | instance->evt_detail_h); |
| 2396 | |
| 2397 | if (instance->producer) |
| 2398 | pci_free_consistent(pdev, sizeof(u32), instance->producer, |
| 2399 | instance->producer_h); |
| 2400 | if (instance->consumer) |
| 2401 | pci_free_consistent(pdev, sizeof(u32), instance->consumer, |
| 2402 | instance->consumer_h); |
| 2403 | scsi_host_put(host); |
| 2404 | |
| 2405 | fail_alloc_instance: |
| 2406 | fail_set_dma_mask: |
| 2407 | pci_disable_device(pdev); |
| 2408 | |
| 2409 | return -ENODEV; |
| 2410 | } |
| 2411 | |
| 2412 | /** |
| 2413 | * megasas_flush_cache - Requests FW to flush all its caches |
| 2414 | * @instance: Adapter soft state |
| 2415 | */ |
| 2416 | static void megasas_flush_cache(struct megasas_instance *instance) |
| 2417 | { |
| 2418 | struct megasas_cmd *cmd; |
| 2419 | struct megasas_dcmd_frame *dcmd; |
| 2420 | |
| 2421 | cmd = megasas_get_cmd(instance); |
| 2422 | |
| 2423 | if (!cmd) |
| 2424 | return; |
| 2425 | |
| 2426 | dcmd = &cmd->frame->dcmd; |
| 2427 | |
| 2428 | memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE); |
| 2429 | |
| 2430 | dcmd->cmd = MFI_CMD_DCMD; |
| 2431 | dcmd->cmd_status = 0x0; |
| 2432 | dcmd->sge_count = 0; |
| 2433 | dcmd->flags = MFI_FRAME_DIR_NONE; |
| 2434 | dcmd->timeout = 0; |
| 2435 | dcmd->data_xfer_len = 0; |
| 2436 | dcmd->opcode = MR_DCMD_CTRL_CACHE_FLUSH; |
| 2437 | dcmd->mbox.b[0] = MR_FLUSH_CTRL_CACHE | MR_FLUSH_DISK_CACHE; |
| 2438 | |
| 2439 | megasas_issue_blocked_cmd(instance, cmd); |
| 2440 | |
| 2441 | megasas_return_cmd(instance, cmd); |
| 2442 | |
| 2443 | return; |
| 2444 | } |
| 2445 | |
| 2446 | /** |
| 2447 | * megasas_shutdown_controller - Instructs FW to shutdown the controller |
| 2448 | * @instance: Adapter soft state |
| 2449 | */ |
| 2450 | static void megasas_shutdown_controller(struct megasas_instance *instance) |
| 2451 | { |
| 2452 | struct megasas_cmd *cmd; |
| 2453 | struct megasas_dcmd_frame *dcmd; |
| 2454 | |
| 2455 | cmd = megasas_get_cmd(instance); |
| 2456 | |
| 2457 | if (!cmd) |
| 2458 | return; |
| 2459 | |
| 2460 | if (instance->aen_cmd) |
| 2461 | megasas_issue_blocked_abort_cmd(instance, instance->aen_cmd); |
| 2462 | |
| 2463 | dcmd = &cmd->frame->dcmd; |
| 2464 | |
| 2465 | memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE); |
| 2466 | |
| 2467 | dcmd->cmd = MFI_CMD_DCMD; |
| 2468 | dcmd->cmd_status = 0x0; |
| 2469 | dcmd->sge_count = 0; |
| 2470 | dcmd->flags = MFI_FRAME_DIR_NONE; |
| 2471 | dcmd->timeout = 0; |
| 2472 | dcmd->data_xfer_len = 0; |
| 2473 | dcmd->opcode = MR_DCMD_CTRL_SHUTDOWN; |
| 2474 | |
| 2475 | megasas_issue_blocked_cmd(instance, cmd); |
| 2476 | |
| 2477 | megasas_return_cmd(instance, cmd); |
| 2478 | |
| 2479 | return; |
| 2480 | } |
| 2481 | |
| 2482 | /** |
| 2483 | * megasas_detach_one - PCI hot"un"plug entry point |
| 2484 | * @pdev: PCI device structure |
| 2485 | */ |
| 2486 | static void megasas_detach_one(struct pci_dev *pdev) |
| 2487 | { |
| 2488 | int i; |
| 2489 | struct Scsi_Host *host; |
| 2490 | struct megasas_instance *instance; |
| 2491 | |
| 2492 | instance = pci_get_drvdata(pdev); |
| 2493 | host = instance->host; |
| 2494 | |
| 2495 | scsi_remove_host(instance->host); |
| 2496 | megasas_flush_cache(instance); |
| 2497 | megasas_shutdown_controller(instance); |
Sumant Patro | 5d018ad | 2006-10-03 13:13:18 -0700 | [diff] [blame] | 2498 | tasklet_kill(&instance->isr_tasklet); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 2499 | |
| 2500 | /* |
| 2501 | * Take the instance off the instance array. Note that we will not |
| 2502 | * decrement the max_index. We let this array be sparse array |
| 2503 | */ |
| 2504 | for (i = 0; i < megasas_mgmt_info.max_index; i++) { |
| 2505 | if (megasas_mgmt_info.instance[i] == instance) { |
| 2506 | megasas_mgmt_info.count--; |
| 2507 | megasas_mgmt_info.instance[i] = NULL; |
| 2508 | |
| 2509 | break; |
| 2510 | } |
| 2511 | } |
| 2512 | |
| 2513 | pci_set_drvdata(instance->pdev, NULL); |
| 2514 | |
Sumant Patro | b274cab | 2006-10-03 12:52:12 -0700 | [diff] [blame] | 2515 | instance->instancet->disable_intr(instance->reg_set); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 2516 | |
| 2517 | free_irq(instance->pdev->irq, instance); |
| 2518 | |
| 2519 | megasas_release_mfi(instance); |
| 2520 | |
| 2521 | pci_free_consistent(pdev, sizeof(struct megasas_evt_detail), |
| 2522 | instance->evt_detail, instance->evt_detail_h); |
| 2523 | |
| 2524 | pci_free_consistent(pdev, sizeof(u32), instance->producer, |
| 2525 | instance->producer_h); |
| 2526 | |
| 2527 | pci_free_consistent(pdev, sizeof(u32), instance->consumer, |
| 2528 | instance->consumer_h); |
| 2529 | |
| 2530 | scsi_host_put(host); |
| 2531 | |
| 2532 | pci_set_drvdata(pdev, NULL); |
| 2533 | |
| 2534 | pci_disable_device(pdev); |
| 2535 | |
| 2536 | return; |
| 2537 | } |
| 2538 | |
| 2539 | /** |
| 2540 | * megasas_shutdown - Shutdown entry point |
| 2541 | * @device: Generic device structure |
| 2542 | */ |
| 2543 | static void megasas_shutdown(struct pci_dev *pdev) |
| 2544 | { |
| 2545 | struct megasas_instance *instance = pci_get_drvdata(pdev); |
| 2546 | megasas_flush_cache(instance); |
| 2547 | } |
| 2548 | |
| 2549 | /** |
| 2550 | * megasas_mgmt_open - char node "open" entry point |
| 2551 | */ |
| 2552 | static int megasas_mgmt_open(struct inode *inode, struct file *filep) |
| 2553 | { |
| 2554 | /* |
| 2555 | * Allow only those users with admin rights |
| 2556 | */ |
| 2557 | if (!capable(CAP_SYS_ADMIN)) |
| 2558 | return -EACCES; |
| 2559 | |
| 2560 | return 0; |
| 2561 | } |
| 2562 | |
| 2563 | /** |
| 2564 | * megasas_mgmt_release - char node "release" entry point |
| 2565 | */ |
| 2566 | static int megasas_mgmt_release(struct inode *inode, struct file *filep) |
| 2567 | { |
| 2568 | filep->private_data = NULL; |
| 2569 | fasync_helper(-1, filep, 0, &megasas_async_queue); |
| 2570 | |
| 2571 | return 0; |
| 2572 | } |
| 2573 | |
| 2574 | /** |
| 2575 | * megasas_mgmt_fasync - Async notifier registration from applications |
| 2576 | * |
| 2577 | * This function adds the calling process to a driver global queue. When an |
| 2578 | * event occurs, SIGIO will be sent to all processes in this queue. |
| 2579 | */ |
| 2580 | static int megasas_mgmt_fasync(int fd, struct file *filep, int mode) |
| 2581 | { |
| 2582 | int rc; |
| 2583 | |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 2584 | mutex_lock(&megasas_async_queue_mutex); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 2585 | |
| 2586 | rc = fasync_helper(fd, filep, mode, &megasas_async_queue); |
| 2587 | |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 2588 | mutex_unlock(&megasas_async_queue_mutex); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 2589 | |
| 2590 | if (rc >= 0) { |
| 2591 | /* For sanity check when we get ioctl */ |
| 2592 | filep->private_data = filep; |
| 2593 | return 0; |
| 2594 | } |
| 2595 | |
| 2596 | printk(KERN_DEBUG "megasas: fasync_helper failed [%d]\n", rc); |
| 2597 | |
| 2598 | return rc; |
| 2599 | } |
| 2600 | |
| 2601 | /** |
| 2602 | * megasas_mgmt_fw_ioctl - Issues management ioctls to FW |
| 2603 | * @instance: Adapter soft state |
| 2604 | * @argp: User's ioctl packet |
| 2605 | */ |
| 2606 | static int |
| 2607 | megasas_mgmt_fw_ioctl(struct megasas_instance *instance, |
| 2608 | struct megasas_iocpacket __user * user_ioc, |
| 2609 | struct megasas_iocpacket *ioc) |
| 2610 | { |
| 2611 | struct megasas_sge32 *kern_sge32; |
| 2612 | struct megasas_cmd *cmd; |
| 2613 | void *kbuff_arr[MAX_IOCTL_SGE]; |
| 2614 | dma_addr_t buf_handle = 0; |
| 2615 | int error = 0, i; |
| 2616 | void *sense = NULL; |
| 2617 | dma_addr_t sense_handle; |
| 2618 | u32 *sense_ptr; |
| 2619 | |
| 2620 | memset(kbuff_arr, 0, sizeof(kbuff_arr)); |
| 2621 | |
| 2622 | if (ioc->sge_count > MAX_IOCTL_SGE) { |
| 2623 | printk(KERN_DEBUG "megasas: SGE count [%d] > max limit [%d]\n", |
| 2624 | ioc->sge_count, MAX_IOCTL_SGE); |
| 2625 | return -EINVAL; |
| 2626 | } |
| 2627 | |
| 2628 | cmd = megasas_get_cmd(instance); |
| 2629 | if (!cmd) { |
| 2630 | printk(KERN_DEBUG "megasas: Failed to get a cmd packet\n"); |
| 2631 | return -ENOMEM; |
| 2632 | } |
| 2633 | |
| 2634 | /* |
| 2635 | * User's IOCTL packet has 2 frames (maximum). Copy those two |
| 2636 | * frames into our cmd's frames. cmd->frame's context will get |
| 2637 | * overwritten when we copy from user's frames. So set that value |
| 2638 | * alone separately |
| 2639 | */ |
| 2640 | memcpy(cmd->frame, ioc->frame.raw, 2 * MEGAMFI_FRAME_SIZE); |
| 2641 | cmd->frame->hdr.context = cmd->index; |
| 2642 | |
| 2643 | /* |
| 2644 | * The management interface between applications and the fw uses |
| 2645 | * MFI frames. E.g, RAID configuration changes, LD property changes |
| 2646 | * etc are accomplishes through different kinds of MFI frames. The |
| 2647 | * driver needs to care only about substituting user buffers with |
| 2648 | * kernel buffers in SGLs. The location of SGL is embedded in the |
| 2649 | * struct iocpacket itself. |
| 2650 | */ |
| 2651 | kern_sge32 = (struct megasas_sge32 *) |
| 2652 | ((unsigned long)cmd->frame + ioc->sgl_off); |
| 2653 | |
| 2654 | /* |
| 2655 | * For each user buffer, create a mirror buffer and copy in |
| 2656 | */ |
| 2657 | for (i = 0; i < ioc->sge_count; i++) { |
| 2658 | kbuff_arr[i] = pci_alloc_consistent(instance->pdev, |
| 2659 | ioc->sgl[i].iov_len, |
| 2660 | &buf_handle); |
| 2661 | if (!kbuff_arr[i]) { |
| 2662 | printk(KERN_DEBUG "megasas: Failed to alloc " |
| 2663 | "kernel SGL buffer for IOCTL \n"); |
| 2664 | error = -ENOMEM; |
| 2665 | goto out; |
| 2666 | } |
| 2667 | |
| 2668 | /* |
| 2669 | * We don't change the dma_coherent_mask, so |
| 2670 | * pci_alloc_consistent only returns 32bit addresses |
| 2671 | */ |
| 2672 | kern_sge32[i].phys_addr = (u32) buf_handle; |
| 2673 | kern_sge32[i].length = ioc->sgl[i].iov_len; |
| 2674 | |
| 2675 | /* |
| 2676 | * We created a kernel buffer corresponding to the |
| 2677 | * user buffer. Now copy in from the user buffer |
| 2678 | */ |
| 2679 | if (copy_from_user(kbuff_arr[i], ioc->sgl[i].iov_base, |
| 2680 | (u32) (ioc->sgl[i].iov_len))) { |
| 2681 | error = -EFAULT; |
| 2682 | goto out; |
| 2683 | } |
| 2684 | } |
| 2685 | |
| 2686 | if (ioc->sense_len) { |
| 2687 | sense = pci_alloc_consistent(instance->pdev, ioc->sense_len, |
| 2688 | &sense_handle); |
| 2689 | if (!sense) { |
| 2690 | error = -ENOMEM; |
| 2691 | goto out; |
| 2692 | } |
| 2693 | |
| 2694 | sense_ptr = |
| 2695 | (u32 *) ((unsigned long)cmd->frame + ioc->sense_off); |
| 2696 | *sense_ptr = sense_handle; |
| 2697 | } |
| 2698 | |
| 2699 | /* |
| 2700 | * Set the sync_cmd flag so that the ISR knows not to complete this |
| 2701 | * cmd to the SCSI mid-layer |
| 2702 | */ |
| 2703 | cmd->sync_cmd = 1; |
| 2704 | megasas_issue_blocked_cmd(instance, cmd); |
| 2705 | cmd->sync_cmd = 0; |
| 2706 | |
| 2707 | /* |
| 2708 | * copy out the kernel buffers to user buffers |
| 2709 | */ |
| 2710 | for (i = 0; i < ioc->sge_count; i++) { |
| 2711 | if (copy_to_user(ioc->sgl[i].iov_base, kbuff_arr[i], |
| 2712 | ioc->sgl[i].iov_len)) { |
| 2713 | error = -EFAULT; |
| 2714 | goto out; |
| 2715 | } |
| 2716 | } |
| 2717 | |
| 2718 | /* |
| 2719 | * copy out the sense |
| 2720 | */ |
| 2721 | if (ioc->sense_len) { |
| 2722 | /* |
| 2723 | * sense_ptr points to the location that has the user |
| 2724 | * sense buffer address |
| 2725 | */ |
| 2726 | sense_ptr = (u32 *) ((unsigned long)ioc->frame.raw + |
| 2727 | ioc->sense_off); |
| 2728 | |
| 2729 | if (copy_to_user((void __user *)((unsigned long)(*sense_ptr)), |
| 2730 | sense, ioc->sense_len)) { |
| 2731 | error = -EFAULT; |
| 2732 | goto out; |
| 2733 | } |
| 2734 | } |
| 2735 | |
| 2736 | /* |
| 2737 | * copy the status codes returned by the fw |
| 2738 | */ |
| 2739 | if (copy_to_user(&user_ioc->frame.hdr.cmd_status, |
| 2740 | &cmd->frame->hdr.cmd_status, sizeof(u8))) { |
| 2741 | printk(KERN_DEBUG "megasas: Error copying out cmd_status\n"); |
| 2742 | error = -EFAULT; |
| 2743 | } |
| 2744 | |
| 2745 | out: |
| 2746 | if (sense) { |
| 2747 | pci_free_consistent(instance->pdev, ioc->sense_len, |
| 2748 | sense, sense_handle); |
| 2749 | } |
| 2750 | |
| 2751 | for (i = 0; i < ioc->sge_count && kbuff_arr[i]; i++) { |
| 2752 | pci_free_consistent(instance->pdev, |
| 2753 | kern_sge32[i].length, |
| 2754 | kbuff_arr[i], kern_sge32[i].phys_addr); |
| 2755 | } |
| 2756 | |
| 2757 | megasas_return_cmd(instance, cmd); |
| 2758 | return error; |
| 2759 | } |
| 2760 | |
| 2761 | static struct megasas_instance *megasas_lookup_instance(u16 host_no) |
| 2762 | { |
| 2763 | int i; |
| 2764 | |
| 2765 | for (i = 0; i < megasas_mgmt_info.max_index; i++) { |
| 2766 | |
| 2767 | if ((megasas_mgmt_info.instance[i]) && |
| 2768 | (megasas_mgmt_info.instance[i]->host->host_no == host_no)) |
| 2769 | return megasas_mgmt_info.instance[i]; |
| 2770 | } |
| 2771 | |
| 2772 | return NULL; |
| 2773 | } |
| 2774 | |
| 2775 | static int megasas_mgmt_ioctl_fw(struct file *file, unsigned long arg) |
| 2776 | { |
| 2777 | struct megasas_iocpacket __user *user_ioc = |
| 2778 | (struct megasas_iocpacket __user *)arg; |
| 2779 | struct megasas_iocpacket *ioc; |
| 2780 | struct megasas_instance *instance; |
| 2781 | int error; |
| 2782 | |
| 2783 | ioc = kmalloc(sizeof(*ioc), GFP_KERNEL); |
| 2784 | if (!ioc) |
| 2785 | return -ENOMEM; |
| 2786 | |
| 2787 | if (copy_from_user(ioc, user_ioc, sizeof(*ioc))) { |
| 2788 | error = -EFAULT; |
| 2789 | goto out_kfree_ioc; |
| 2790 | } |
| 2791 | |
| 2792 | instance = megasas_lookup_instance(ioc->host_no); |
| 2793 | if (!instance) { |
| 2794 | error = -ENODEV; |
| 2795 | goto out_kfree_ioc; |
| 2796 | } |
| 2797 | |
| 2798 | /* |
| 2799 | * We will allow only MEGASAS_INT_CMDS number of parallel ioctl cmds |
| 2800 | */ |
| 2801 | if (down_interruptible(&instance->ioctl_sem)) { |
| 2802 | error = -ERESTARTSYS; |
| 2803 | goto out_kfree_ioc; |
| 2804 | } |
| 2805 | error = megasas_mgmt_fw_ioctl(instance, user_ioc, ioc); |
| 2806 | up(&instance->ioctl_sem); |
| 2807 | |
| 2808 | out_kfree_ioc: |
| 2809 | kfree(ioc); |
| 2810 | return error; |
| 2811 | } |
| 2812 | |
| 2813 | static int megasas_mgmt_ioctl_aen(struct file *file, unsigned long arg) |
| 2814 | { |
| 2815 | struct megasas_instance *instance; |
| 2816 | struct megasas_aen aen; |
| 2817 | int error; |
| 2818 | |
| 2819 | if (file->private_data != file) { |
| 2820 | printk(KERN_DEBUG "megasas: fasync_helper was not " |
| 2821 | "called first\n"); |
| 2822 | return -EINVAL; |
| 2823 | } |
| 2824 | |
| 2825 | if (copy_from_user(&aen, (void __user *)arg, sizeof(aen))) |
| 2826 | return -EFAULT; |
| 2827 | |
| 2828 | instance = megasas_lookup_instance(aen.host_no); |
| 2829 | |
| 2830 | if (!instance) |
| 2831 | return -ENODEV; |
| 2832 | |
| 2833 | down(&instance->aen_mutex); |
| 2834 | error = megasas_register_aen(instance, aen.seq_num, |
| 2835 | aen.class_locale_word); |
| 2836 | up(&instance->aen_mutex); |
| 2837 | return error; |
| 2838 | } |
| 2839 | |
| 2840 | /** |
| 2841 | * megasas_mgmt_ioctl - char node ioctl entry point |
| 2842 | */ |
| 2843 | static long |
| 2844 | megasas_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
| 2845 | { |
| 2846 | switch (cmd) { |
| 2847 | case MEGASAS_IOC_FIRMWARE: |
| 2848 | return megasas_mgmt_ioctl_fw(file, arg); |
| 2849 | |
| 2850 | case MEGASAS_IOC_GET_AEN: |
| 2851 | return megasas_mgmt_ioctl_aen(file, arg); |
| 2852 | } |
| 2853 | |
| 2854 | return -ENOTTY; |
| 2855 | } |
| 2856 | |
| 2857 | #ifdef CONFIG_COMPAT |
| 2858 | static int megasas_mgmt_compat_ioctl_fw(struct file *file, unsigned long arg) |
| 2859 | { |
| 2860 | struct compat_megasas_iocpacket __user *cioc = |
| 2861 | (struct compat_megasas_iocpacket __user *)arg; |
| 2862 | struct megasas_iocpacket __user *ioc = |
| 2863 | compat_alloc_user_space(sizeof(struct megasas_iocpacket)); |
| 2864 | int i; |
| 2865 | int error = 0; |
| 2866 | |
| 2867 | clear_user(ioc, sizeof(*ioc)); |
| 2868 | |
| 2869 | if (copy_in_user(&ioc->host_no, &cioc->host_no, sizeof(u16)) || |
| 2870 | copy_in_user(&ioc->sgl_off, &cioc->sgl_off, sizeof(u32)) || |
| 2871 | copy_in_user(&ioc->sense_off, &cioc->sense_off, sizeof(u32)) || |
| 2872 | copy_in_user(&ioc->sense_len, &cioc->sense_len, sizeof(u32)) || |
| 2873 | copy_in_user(ioc->frame.raw, cioc->frame.raw, 128) || |
| 2874 | copy_in_user(&ioc->sge_count, &cioc->sge_count, sizeof(u32))) |
| 2875 | return -EFAULT; |
| 2876 | |
| 2877 | for (i = 0; i < MAX_IOCTL_SGE; i++) { |
| 2878 | compat_uptr_t ptr; |
| 2879 | |
| 2880 | if (get_user(ptr, &cioc->sgl[i].iov_base) || |
| 2881 | put_user(compat_ptr(ptr), &ioc->sgl[i].iov_base) || |
| 2882 | copy_in_user(&ioc->sgl[i].iov_len, |
| 2883 | &cioc->sgl[i].iov_len, sizeof(compat_size_t))) |
| 2884 | return -EFAULT; |
| 2885 | } |
| 2886 | |
| 2887 | error = megasas_mgmt_ioctl_fw(file, (unsigned long)ioc); |
| 2888 | |
| 2889 | if (copy_in_user(&cioc->frame.hdr.cmd_status, |
| 2890 | &ioc->frame.hdr.cmd_status, sizeof(u8))) { |
| 2891 | printk(KERN_DEBUG "megasas: error copy_in_user cmd_status\n"); |
| 2892 | return -EFAULT; |
| 2893 | } |
| 2894 | return error; |
| 2895 | } |
| 2896 | |
| 2897 | static long |
| 2898 | megasas_mgmt_compat_ioctl(struct file *file, unsigned int cmd, |
| 2899 | unsigned long arg) |
| 2900 | { |
| 2901 | switch (cmd) { |
Sumant Patro | cb59aa6 | 2006-01-25 11:53:25 -0800 | [diff] [blame] | 2902 | case MEGASAS_IOC_FIRMWARE32: |
| 2903 | return megasas_mgmt_compat_ioctl_fw(file, arg); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 2904 | case MEGASAS_IOC_GET_AEN: |
| 2905 | return megasas_mgmt_ioctl_aen(file, arg); |
| 2906 | } |
| 2907 | |
| 2908 | return -ENOTTY; |
| 2909 | } |
| 2910 | #endif |
| 2911 | |
| 2912 | /* |
| 2913 | * File operations structure for management interface |
| 2914 | */ |
| 2915 | static struct file_operations megasas_mgmt_fops = { |
| 2916 | .owner = THIS_MODULE, |
| 2917 | .open = megasas_mgmt_open, |
| 2918 | .release = megasas_mgmt_release, |
| 2919 | .fasync = megasas_mgmt_fasync, |
| 2920 | .unlocked_ioctl = megasas_mgmt_ioctl, |
| 2921 | #ifdef CONFIG_COMPAT |
| 2922 | .compat_ioctl = megasas_mgmt_compat_ioctl, |
| 2923 | #endif |
| 2924 | }; |
| 2925 | |
| 2926 | /* |
| 2927 | * PCI hotplug support registration structure |
| 2928 | */ |
| 2929 | static struct pci_driver megasas_pci_driver = { |
| 2930 | |
| 2931 | .name = "megaraid_sas", |
| 2932 | .id_table = megasas_pci_table, |
| 2933 | .probe = megasas_probe_one, |
| 2934 | .remove = __devexit_p(megasas_detach_one), |
| 2935 | .shutdown = megasas_shutdown, |
| 2936 | }; |
| 2937 | |
| 2938 | /* |
| 2939 | * Sysfs driver attributes |
| 2940 | */ |
| 2941 | static ssize_t megasas_sysfs_show_version(struct device_driver *dd, char *buf) |
| 2942 | { |
| 2943 | return snprintf(buf, strlen(MEGASAS_VERSION) + 2, "%s\n", |
| 2944 | MEGASAS_VERSION); |
| 2945 | } |
| 2946 | |
| 2947 | static DRIVER_ATTR(version, S_IRUGO, megasas_sysfs_show_version, NULL); |
| 2948 | |
| 2949 | static ssize_t |
| 2950 | megasas_sysfs_show_release_date(struct device_driver *dd, char *buf) |
| 2951 | { |
| 2952 | return snprintf(buf, strlen(MEGASAS_RELDATE) + 2, "%s\n", |
| 2953 | MEGASAS_RELDATE); |
| 2954 | } |
| 2955 | |
| 2956 | static DRIVER_ATTR(release_date, S_IRUGO, megasas_sysfs_show_release_date, |
| 2957 | NULL); |
| 2958 | |
Sumant Patro | 658dced | 2006-10-03 13:09:14 -0700 | [diff] [blame] | 2959 | static ssize_t |
| 2960 | megasas_sysfs_show_dbg_lvl(struct device_driver *dd, char *buf) |
| 2961 | { |
| 2962 | return sprintf(buf,"%u",megasas_dbg_lvl); |
| 2963 | } |
| 2964 | |
| 2965 | static ssize_t |
| 2966 | megasas_sysfs_set_dbg_lvl(struct device_driver *dd, const char *buf, size_t count) |
| 2967 | { |
| 2968 | int retval = count; |
| 2969 | if(sscanf(buf,"%u",&megasas_dbg_lvl)<1){ |
| 2970 | printk(KERN_ERR "megasas: could not set dbg_lvl\n"); |
| 2971 | retval = -EINVAL; |
| 2972 | } |
| 2973 | return retval; |
| 2974 | } |
| 2975 | |
| 2976 | static DRIVER_ATTR(dbg_lvl, S_IRUGO|S_IWUGO, megasas_sysfs_show_dbg_lvl, |
| 2977 | megasas_sysfs_set_dbg_lvl); |
| 2978 | |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 2979 | /** |
| 2980 | * megasas_init - Driver load entry point |
| 2981 | */ |
| 2982 | static int __init megasas_init(void) |
| 2983 | { |
| 2984 | int rval; |
| 2985 | |
| 2986 | /* |
| 2987 | * Announce driver version and other information |
| 2988 | */ |
| 2989 | printk(KERN_INFO "megasas: %s %s\n", MEGASAS_VERSION, |
| 2990 | MEGASAS_EXT_VERSION); |
| 2991 | |
| 2992 | memset(&megasas_mgmt_info, 0, sizeof(megasas_mgmt_info)); |
| 2993 | |
| 2994 | /* |
| 2995 | * Register character device node |
| 2996 | */ |
| 2997 | rval = register_chrdev(0, "megaraid_sas_ioctl", &megasas_mgmt_fops); |
| 2998 | |
| 2999 | if (rval < 0) { |
| 3000 | printk(KERN_DEBUG "megasas: failed to open device node\n"); |
| 3001 | return rval; |
| 3002 | } |
| 3003 | |
| 3004 | megasas_mgmt_majorno = rval; |
| 3005 | |
| 3006 | /* |
| 3007 | * Register ourselves as PCI hotplug module |
| 3008 | */ |
Michal Piotrowski | 4041b9c | 2006-08-17 13:28:22 +0000 | [diff] [blame] | 3009 | rval = pci_register_driver(&megasas_pci_driver); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 3010 | |
| 3011 | if (rval) { |
| 3012 | printk(KERN_DEBUG "megasas: PCI hotplug regisration failed \n"); |
| 3013 | unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl"); |
| 3014 | } |
| 3015 | |
| 3016 | driver_create_file(&megasas_pci_driver.driver, &driver_attr_version); |
| 3017 | driver_create_file(&megasas_pci_driver.driver, |
| 3018 | &driver_attr_release_date); |
Sumant Patro | 658dced | 2006-10-03 13:09:14 -0700 | [diff] [blame] | 3019 | driver_create_file(&megasas_pci_driver.driver, |
| 3020 | &driver_attr_dbg_lvl); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 3021 | |
| 3022 | return rval; |
| 3023 | } |
| 3024 | |
| 3025 | /** |
| 3026 | * megasas_exit - Driver unload entry point |
| 3027 | */ |
| 3028 | static void __exit megasas_exit(void) |
| 3029 | { |
| 3030 | driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version); |
| 3031 | driver_remove_file(&megasas_pci_driver.driver, |
| 3032 | &driver_attr_release_date); |
Sumant Patro | 658dced | 2006-10-03 13:09:14 -0700 | [diff] [blame] | 3033 | driver_remove_file(&megasas_pci_driver.driver, |
| 3034 | &driver_attr_dbg_lvl); |
Bagalkote, Sreenivas | c4a3e0a | 2005-09-20 17:46:58 -0400 | [diff] [blame] | 3035 | |
| 3036 | pci_unregister_driver(&megasas_pci_driver); |
| 3037 | unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl"); |
| 3038 | } |
| 3039 | |
| 3040 | module_init(megasas_init); |
| 3041 | module_exit(megasas_exit); |