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 raid_level; /* from inquiry page 0xC1 */ 49 }; 50 51 struct ctlr_info { 52 int ctlr; 53 char devname[8]; 54 char *product_name; 55 struct pci_dev *pdev; 56 u32 board_id; 57 void __iomem *vaddr; 58 unsigned long paddr; 59 int nr_cmds; /* Number of commands allowed on this controller */ 60 struct CfgTable __iomem *cfgtable; 61 int max_sg_entries; 62 int interrupts_enabled; 63 int major; 64 int max_commands; 65 int commands_outstanding; 66 int max_outstanding; /* Debug */ 67 int usage_count; /* number of opens all all minor devices */ 68 # define PERF_MODE_INT 0 69 # define DOORBELL_INT 1 70 # define SIMPLE_MODE_INT 2 71 # define MEMQ_MODE_INT 3 72 unsigned int intr[4]; 73 unsigned int msix_vector; 74 unsigned int msi_vector; 75 int intr_mode; /* either PERF_MODE_INT or SIMPLE_MODE_INT */ 76 struct access_method access; 77 78 /* queue and queue Info */ 79 struct list_head reqQ; 80 struct list_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_RESET_TYPE_CONTROLLER 0x00 131 #define HPSA_RESET_TYPE_BUS 0x01 132 #define HPSA_RESET_TYPE_TARGET 0x03 133 #define HPSA_RESET_TYPE_LUN 0x04 134 #define HPSA_MSG_SEND_RETRY_LIMIT 10 135 #define HPSA_MSG_SEND_RETRY_INTERVAL_MSECS (10000) 136 137 /* Maximum time in seconds driver will wait for command completions 138 * when polling before giving up. 139 */ 140 #define HPSA_MAX_POLL_TIME_SECS (20) 141 142 /* During SCSI error recovery, HPSA_TUR_RETRY_LIMIT defines 143 * how many times to retry TEST UNIT READY on a device 144 * while waiting for it to become ready before giving up. 145 * HPSA_MAX_WAIT_INTERVAL_SECS is the max wait interval 146 * between sending TURs while waiting for a device 147 * to become ready. 148 */ 149 #define HPSA_TUR_RETRY_LIMIT (20) 150 #define HPSA_MAX_WAIT_INTERVAL_SECS (30) 151 152 /* HPSA_BOARD_READY_WAIT_SECS is how long to wait for a board 153 * to become ready, in seconds, before giving up on it. 154 * HPSA_BOARD_READY_POLL_INTERVAL_MSECS * is how long to wait 155 * between polling the board to see if it is ready, in 156 * milliseconds. HPSA_BOARD_READY_POLL_INTERVAL and 157 * HPSA_BOARD_READY_ITERATIONS are derived from those. 158 */ 159 #define HPSA_BOARD_READY_WAIT_SECS (120) 160 #define HPSA_BOARD_NOT_READY_WAIT_SECS (100) 161 #define HPSA_BOARD_READY_POLL_INTERVAL_MSECS (100) 162 #define HPSA_BOARD_READY_POLL_INTERVAL \ 163 ((HPSA_BOARD_READY_POLL_INTERVAL_MSECS * HZ) / 1000) 164 #define HPSA_BOARD_READY_ITERATIONS \ 165 ((HPSA_BOARD_READY_WAIT_SECS * 1000) / \ 166 HPSA_BOARD_READY_POLL_INTERVAL_MSECS) 167 #define HPSA_BOARD_NOT_READY_ITERATIONS \ 168 ((HPSA_BOARD_NOT_READY_WAIT_SECS * 1000) / \ 169 HPSA_BOARD_READY_POLL_INTERVAL_MSECS) 170 #define HPSA_POST_RESET_PAUSE_MSECS (3000) 171 #define HPSA_POST_RESET_NOOP_RETRIES (12) 172 173 /* Defining the diffent access_menthods */ 174 /* 175 * Memory mapped FIFO interface (SMART 53xx cards) 176 */ 177 #define SA5_DOORBELL 0x20 178 #define SA5_REQUEST_PORT_OFFSET 0x40 179 #define SA5_REPLY_INTR_MASK_OFFSET 0x34 180 #define SA5_REPLY_PORT_OFFSET 0x44 181 #define SA5_INTR_STATUS 0x30 182 #define SA5_SCRATCHPAD_OFFSET 0xB0 183 184 #define SA5_CTCFG_OFFSET 0xB4 185 #define SA5_CTMEM_OFFSET 0xB8 186 187 #define SA5_INTR_OFF 0x08 188 #define SA5B_INTR_OFF 0x04 189 #define SA5_INTR_PENDING 0x08 190 #define SA5B_INTR_PENDING 0x04 191 #define FIFO_EMPTY 0xffffffff 192 #define HPSA_FIRMWARE_READY 0xffff0000 /* value in scratchpad register */ 193 194 #define HPSA_ERROR_BIT 0x02 195 196 /* Performant mode flags */ 197 #define SA5_PERF_INTR_PENDING 0x04 198 #define SA5_PERF_INTR_OFF 0x05 199 #define SA5_OUTDB_STATUS_PERF_BIT 0x01 200 #define SA5_OUTDB_CLEAR_PERF_BIT 0x01 201 #define SA5_OUTDB_CLEAR 0xA0 202 #define SA5_OUTDB_CLEAR_PERF_BIT 0x01 203 #define SA5_OUTDB_STATUS 0x9C 204 205 206 #define HPSA_INTR_ON 1 207 #define HPSA_INTR_OFF 0 208 /* 209 Send the command to the hardware 210 */ 211 static void SA5_submit_command(struct ctlr_info *h, 212 struct CommandList *c) 213 { 214 dev_dbg(&h->pdev->dev, "Sending %x, tag = %x\n", c->busaddr, 215 c->Header.Tag.lower); 216 writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET); 217 (void) readl(h->vaddr + SA5_REQUEST_PORT_OFFSET); 218 h->commands_outstanding++; 219 if (h->commands_outstanding > h->max_outstanding) 220 h->max_outstanding = h->commands_outstanding; 221 } 222 223 /* 224 * This card is the opposite of the other cards. 225 * 0 turns interrupts on... 226 * 0x08 turns them off... 227 */ 228 static void SA5_intr_mask(struct ctlr_info *h, unsigned long val) 229 { 230 if (val) { /* Turn interrupts on */ 231 h->interrupts_enabled = 1; 232 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET); 233 (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET); 234 } else { /* Turn them off */ 235 h->interrupts_enabled = 0; 236 writel(SA5_INTR_OFF, 237 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET); 238 (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET); 239 } 240 } 241 242 static void SA5_performant_intr_mask(struct ctlr_info *h, unsigned long val) 243 { 244 if (val) { /* turn on interrupts */ 245 h->interrupts_enabled = 1; 246 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET); 247 (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET); 248 } else { 249 h->interrupts_enabled = 0; 250 writel(SA5_PERF_INTR_OFF, 251 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET); 252 (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET); 253 } 254 } 255 256 static unsigned long SA5_performant_completed(struct ctlr_info *h) 257 { 258 unsigned long register_value = FIFO_EMPTY; 259 260 /* flush the controller write of the reply queue by reading 261 * outbound doorbell status register. 262 */ 263 register_value = readl(h->vaddr + SA5_OUTDB_STATUS); 264 /* msi auto clears the interrupt pending bit. */ 265 if (!(h->msi_vector || h->msix_vector)) { 266 writel(SA5_OUTDB_CLEAR_PERF_BIT, h->vaddr + SA5_OUTDB_CLEAR); 267 /* Do a read in order to flush the write to the controller 268 * (as per spec.) 269 */ 270 register_value = readl(h->vaddr + SA5_OUTDB_STATUS); 271 } 272 273 if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) { 274 register_value = *(h->reply_pool_head); 275 (h->reply_pool_head)++; 276 h->commands_outstanding--; 277 } else { 278 register_value = FIFO_EMPTY; 279 } 280 /* Check for wraparound */ 281 if (h->reply_pool_head == (h->reply_pool + h->max_commands)) { 282 h->reply_pool_head = h->reply_pool; 283 h->reply_pool_wraparound ^= 1; 284 } 285 286 return register_value; 287 } 288 289 /* 290 * Returns true if fifo is full. 291 * 292 */ 293 static unsigned long SA5_fifo_full(struct ctlr_info *h) 294 { 295 if (h->commands_outstanding >= h->max_commands) 296 return 1; 297 else 298 return 0; 299 300 } 301 /* 302 * returns value read from hardware. 303 * returns FIFO_EMPTY if there is nothing to read 304 */ 305 static unsigned long SA5_completed(struct ctlr_info *h) 306 { 307 unsigned long register_value 308 = readl(h->vaddr + SA5_REPLY_PORT_OFFSET); 309 310 if (register_value != FIFO_EMPTY) 311 h->commands_outstanding--; 312 313 #ifdef HPSA_DEBUG 314 if (register_value != FIFO_EMPTY) 315 dev_dbg(&h->pdev->dev, "Read %lx back from board\n", 316 register_value); 317 else 318 dev_dbg(&h->pdev->dev, "hpsa: FIFO Empty read\n"); 319 #endif 320 321 return register_value; 322 } 323 /* 324 * Returns true if an interrupt is pending.. 325 */ 326 static bool SA5_intr_pending(struct ctlr_info *h) 327 { 328 unsigned long register_value = 329 readl(h->vaddr + SA5_INTR_STATUS); 330 dev_dbg(&h->pdev->dev, "intr_pending %lx\n", register_value); 331 return register_value & SA5_INTR_PENDING; 332 } 333 334 static bool SA5_performant_intr_pending(struct ctlr_info *h) 335 { 336 unsigned long register_value = readl(h->vaddr + SA5_INTR_STATUS); 337 338 if (!register_value) 339 return false; 340 341 if (h->msi_vector || h->msix_vector) 342 return true; 343 344 /* Read outbound doorbell to flush */ 345 register_value = readl(h->vaddr + SA5_OUTDB_STATUS); 346 return register_value & SA5_OUTDB_STATUS_PERF_BIT; 347 } 348 349 static struct access_method SA5_access = { 350 SA5_submit_command, 351 SA5_intr_mask, 352 SA5_fifo_full, 353 SA5_intr_pending, 354 SA5_completed, 355 }; 356 357 static struct access_method SA5_performant_access = { 358 SA5_submit_command, 359 SA5_performant_intr_mask, 360 SA5_fifo_full, 361 SA5_performant_intr_pending, 362 SA5_performant_completed, 363 }; 364 365 struct board_type { 366 u32 board_id; 367 char *product_name; 368 struct access_method *access; 369 }; 370 371 #endif /* HPSA_H */ 372 373