1 /* 2 * Disk Array driver for HP Smart Array SAS controllers 3 * Copyright 2000, 2009 Hewlett-Packard Development Company, L.P. 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; version 2 of the License. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or 12 * NON INFRINGEMENT. See the GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 17 * 18 * Questions/Comments/Bugfixes to iss_storagedev@hp.com 19 * 20 */ 21 #ifndef HPSA_H 22 #define HPSA_H 23 24 #include <scsi/scsicam.h> 25 26 #define IO_OK 0 27 #define IO_ERROR 1 28 29 struct ctlr_info; 30 31 struct access_method { 32 void (*submit_command)(struct ctlr_info *h, 33 struct CommandList *c); 34 void (*set_intr_mask)(struct ctlr_info *h, unsigned long val); 35 unsigned long (*fifo_full)(struct ctlr_info *h); 36 bool (*intr_pending)(struct ctlr_info *h); 37 unsigned long (*command_completed)(struct ctlr_info *h); 38 }; 39 40 struct hpsa_scsi_dev_t { 41 int devtype; 42 int bus, target, lun; /* as presented to the OS */ 43 unsigned char scsi3addr[8]; /* as presented to the HW */ 44 #define RAID_CTLR_LUNID "\0\0\0\0\0\0\0\0" 45 unsigned char device_id[16]; /* from inquiry pg. 0x83 */ 46 unsigned char vendor[8]; /* bytes 8-15 of inquiry data */ 47 unsigned char model[16]; /* bytes 16-31 of inquiry data */ 48 unsigned char revision[4]; /* bytes 32-35 of inquiry data */ 49 unsigned char raid_level; /* from inquiry page 0xC1 */ 50 }; 51 52 struct ctlr_info { 53 int ctlr; 54 char devname[8]; 55 char *product_name; 56 struct pci_dev *pdev; 57 u32 board_id; 58 void __iomem *vaddr; 59 unsigned long paddr; 60 int nr_cmds; /* Number of commands allowed on this controller */ 61 struct CfgTable __iomem *cfgtable; 62 int max_sg_entries; 63 int interrupts_enabled; 64 int major; 65 int max_commands; 66 int commands_outstanding; 67 int max_outstanding; /* Debug */ 68 int usage_count; /* number of opens all all minor devices */ 69 # define PERF_MODE_INT 0 70 # define DOORBELL_INT 1 71 # define SIMPLE_MODE_INT 2 72 # define MEMQ_MODE_INT 3 73 unsigned int intr[4]; 74 unsigned int msix_vector; 75 unsigned int msi_vector; 76 struct access_method access; 77 78 /* queue and queue Info */ 79 struct hlist_head reqQ; 80 struct hlist_head cmpQ; 81 unsigned int Qdepth; 82 unsigned int maxQsinceinit; 83 unsigned int maxSG; 84 spinlock_t lock; 85 int maxsgentries; 86 u8 max_cmd_sg_entries; 87 int chainsize; 88 struct SGDescriptor **cmd_sg_list; 89 90 /* pointers to command and error info pool */ 91 struct CommandList *cmd_pool; 92 dma_addr_t cmd_pool_dhandle; 93 struct ErrorInfo *errinfo_pool; 94 dma_addr_t errinfo_pool_dhandle; 95 unsigned long *cmd_pool_bits; 96 int nr_allocs; 97 int nr_frees; 98 int busy_initializing; 99 int busy_scanning; 100 int scan_finished; 101 spinlock_t scan_lock; 102 wait_queue_head_t scan_wait_queue; 103 104 struct Scsi_Host *scsi_host; 105 spinlock_t devlock; /* to protect hba[ctlr]->dev[]; */ 106 int ndevices; /* number of used elements in .dev[] array. */ 107 #define HPSA_MAX_SCSI_DEVS_PER_HBA 256 108 struct hpsa_scsi_dev_t *dev[HPSA_MAX_SCSI_DEVS_PER_HBA]; 109 /* 110 * Performant mode tables. 111 */ 112 u32 trans_support; 113 u32 trans_offset; 114 struct TransTable_struct *transtable; 115 unsigned long transMethod; 116 117 /* 118 * Performant mode completion buffer 119 */ 120 u64 *reply_pool; 121 dma_addr_t reply_pool_dhandle; 122 u64 *reply_pool_head; 123 size_t reply_pool_size; 124 unsigned char reply_pool_wraparound; 125 u32 *blockFetchTable; 126 unsigned char *hba_inquiry_data; 127 }; 128 #define HPSA_ABORT_MSG 0 129 #define HPSA_DEVICE_RESET_MSG 1 130 #define HPSA_BUS_RESET_MSG 2 131 #define HPSA_HOST_RESET_MSG 3 132 #define HPSA_MSG_SEND_RETRY_LIMIT 10 133 #define HPSA_MSG_SEND_RETRY_INTERVAL_MSECS 1000 134 135 /* Maximum time in seconds driver will wait for command completions 136 * when polling before giving up. 137 */ 138 #define HPSA_MAX_POLL_TIME_SECS (20) 139 140 /* During SCSI error recovery, HPSA_TUR_RETRY_LIMIT defines 141 * how many times to retry TEST UNIT READY on a device 142 * while waiting for it to become ready before giving up. 143 * HPSA_MAX_WAIT_INTERVAL_SECS is the max wait interval 144 * between sending TURs while waiting for a device 145 * to become ready. 146 */ 147 #define HPSA_TUR_RETRY_LIMIT (20) 148 #define HPSA_MAX_WAIT_INTERVAL_SECS (30) 149 150 /* HPSA_BOARD_READY_WAIT_SECS is how long to wait for a board 151 * to become ready, in seconds, before giving up on it. 152 * HPSA_BOARD_READY_POLL_INTERVAL_MSECS * is how long to wait 153 * between polling the board to see if it is ready, in 154 * milliseconds. HPSA_BOARD_READY_POLL_INTERVAL and 155 * HPSA_BOARD_READY_ITERATIONS are derived from those. 156 */ 157 #define HPSA_BOARD_READY_WAIT_SECS (120) 158 #define HPSA_BOARD_READY_POLL_INTERVAL_MSECS (100) 159 #define HPSA_BOARD_READY_POLL_INTERVAL \ 160 ((HPSA_BOARD_READY_POLL_INTERVAL_MSECS * HZ) / 1000) 161 #define HPSA_BOARD_READY_ITERATIONS \ 162 ((HPSA_BOARD_READY_WAIT_SECS * 1000) / \ 163 HPSA_BOARD_READY_POLL_INTERVAL_MSECS) 164 #define HPSA_POST_RESET_PAUSE_MSECS (3000) 165 #define HPSA_POST_RESET_NOOP_RETRIES (12) 166 167 /* Defining the diffent access_menthods */ 168 /* 169 * Memory mapped FIFO interface (SMART 53xx cards) 170 */ 171 #define SA5_DOORBELL 0x20 172 #define SA5_REQUEST_PORT_OFFSET 0x40 173 #define SA5_REPLY_INTR_MASK_OFFSET 0x34 174 #define SA5_REPLY_PORT_OFFSET 0x44 175 #define SA5_INTR_STATUS 0x30 176 #define SA5_SCRATCHPAD_OFFSET 0xB0 177 178 #define SA5_CTCFG_OFFSET 0xB4 179 #define SA5_CTMEM_OFFSET 0xB8 180 181 #define SA5_INTR_OFF 0x08 182 #define SA5B_INTR_OFF 0x04 183 #define SA5_INTR_PENDING 0x08 184 #define SA5B_INTR_PENDING 0x04 185 #define FIFO_EMPTY 0xffffffff 186 #define HPSA_FIRMWARE_READY 0xffff0000 /* value in scratchpad register */ 187 188 #define HPSA_ERROR_BIT 0x02 189 190 /* Performant mode flags */ 191 #define SA5_PERF_INTR_PENDING 0x04 192 #define SA5_PERF_INTR_OFF 0x05 193 #define SA5_OUTDB_STATUS_PERF_BIT 0x01 194 #define SA5_OUTDB_CLEAR_PERF_BIT 0x01 195 #define SA5_OUTDB_CLEAR 0xA0 196 #define SA5_OUTDB_CLEAR_PERF_BIT 0x01 197 #define SA5_OUTDB_STATUS 0x9C 198 199 200 #define HPSA_INTR_ON 1 201 #define HPSA_INTR_OFF 0 202 /* 203 Send the command to the hardware 204 */ 205 static void SA5_submit_command(struct ctlr_info *h, 206 struct CommandList *c) 207 { 208 dev_dbg(&h->pdev->dev, "Sending %x, tag = %x\n", c->busaddr, 209 c->Header.Tag.lower); 210 writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET); 211 h->commands_outstanding++; 212 if (h->commands_outstanding > h->max_outstanding) 213 h->max_outstanding = h->commands_outstanding; 214 } 215 216 /* 217 * This card is the opposite of the other cards. 218 * 0 turns interrupts on... 219 * 0x08 turns them off... 220 */ 221 static void SA5_intr_mask(struct ctlr_info *h, unsigned long val) 222 { 223 if (val) { /* Turn interrupts on */ 224 h->interrupts_enabled = 1; 225 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET); 226 } else { /* Turn them off */ 227 h->interrupts_enabled = 0; 228 writel(SA5_INTR_OFF, 229 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET); 230 } 231 } 232 233 static void SA5_performant_intr_mask(struct ctlr_info *h, unsigned long val) 234 { 235 if (val) { /* turn on interrupts */ 236 h->interrupts_enabled = 1; 237 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET); 238 } else { 239 h->interrupts_enabled = 0; 240 writel(SA5_PERF_INTR_OFF, 241 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET); 242 } 243 } 244 245 static unsigned long SA5_performant_completed(struct ctlr_info *h) 246 { 247 unsigned long register_value = FIFO_EMPTY; 248 249 /* flush the controller write of the reply queue by reading 250 * outbound doorbell status register. 251 */ 252 register_value = readl(h->vaddr + SA5_OUTDB_STATUS); 253 /* msi auto clears the interrupt pending bit. */ 254 if (!(h->msi_vector || h->msix_vector)) { 255 writel(SA5_OUTDB_CLEAR_PERF_BIT, h->vaddr + SA5_OUTDB_CLEAR); 256 /* Do a read in order to flush the write to the controller 257 * (as per spec.) 258 */ 259 register_value = readl(h->vaddr + SA5_OUTDB_STATUS); 260 } 261 262 if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) { 263 register_value = *(h->reply_pool_head); 264 (h->reply_pool_head)++; 265 h->commands_outstanding--; 266 } else { 267 register_value = FIFO_EMPTY; 268 } 269 /* Check for wraparound */ 270 if (h->reply_pool_head == (h->reply_pool + h->max_commands)) { 271 h->reply_pool_head = h->reply_pool; 272 h->reply_pool_wraparound ^= 1; 273 } 274 275 return register_value; 276 } 277 278 /* 279 * Returns true if fifo is full. 280 * 281 */ 282 static unsigned long SA5_fifo_full(struct ctlr_info *h) 283 { 284 if (h->commands_outstanding >= h->max_commands) 285 return 1; 286 else 287 return 0; 288 289 } 290 /* 291 * returns value read from hardware. 292 * returns FIFO_EMPTY if there is nothing to read 293 */ 294 static unsigned long SA5_completed(struct ctlr_info *h) 295 { 296 unsigned long register_value 297 = readl(h->vaddr + SA5_REPLY_PORT_OFFSET); 298 299 if (register_value != FIFO_EMPTY) 300 h->commands_outstanding--; 301 302 #ifdef HPSA_DEBUG 303 if (register_value != FIFO_EMPTY) 304 dev_dbg(&h->pdev->dev, "Read %lx back from board\n", 305 register_value); 306 else 307 dev_dbg(&h->pdev->dev, "hpsa: FIFO Empty read\n"); 308 #endif 309 310 return register_value; 311 } 312 /* 313 * Returns true if an interrupt is pending.. 314 */ 315 static bool SA5_intr_pending(struct ctlr_info *h) 316 { 317 unsigned long register_value = 318 readl(h->vaddr + SA5_INTR_STATUS); 319 dev_dbg(&h->pdev->dev, "intr_pending %lx\n", register_value); 320 return register_value & SA5_INTR_PENDING; 321 } 322 323 static bool SA5_performant_intr_pending(struct ctlr_info *h) 324 { 325 unsigned long register_value = readl(h->vaddr + SA5_INTR_STATUS); 326 327 if (!register_value) 328 return false; 329 330 if (h->msi_vector || h->msix_vector) 331 return true; 332 333 /* Read outbound doorbell to flush */ 334 register_value = readl(h->vaddr + SA5_OUTDB_STATUS); 335 return register_value & SA5_OUTDB_STATUS_PERF_BIT; 336 } 337 338 static struct access_method SA5_access = { 339 SA5_submit_command, 340 SA5_intr_mask, 341 SA5_fifo_full, 342 SA5_intr_pending, 343 SA5_completed, 344 }; 345 346 static struct access_method SA5_performant_access = { 347 SA5_submit_command, 348 SA5_performant_intr_mask, 349 SA5_fifo_full, 350 SA5_performant_intr_pending, 351 SA5_performant_completed, 352 }; 353 354 struct board_type { 355 u32 board_id; 356 char *product_name; 357 struct access_method *access; 358 }; 359 360 #endif /* HPSA_H */ 361 362