2 * Disk Array driver for HP Smart Array SAS controllers
3 * Copyright 2000, 2009 Hewlett-Packard Development Company, L.P.
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.
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.
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.
18 * Questions/Comments/Bugfixes to iss_storagedev@hp.com
24 #include <scsi/scsicam.h>
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, u8 q);
40 struct hpsa_scsi_dev_t {
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 */
66 int nr_cmds; /* Number of commands allowed on this controller */
67 struct CfgTable __iomem *cfgtable;
68 int interrupts_enabled;
71 int commands_outstanding;
72 int max_outstanding; /* Debug */
73 int usage_count; /* number of opens all all minor devices */
74 # define PERF_MODE_INT 0
75 # define DOORBELL_INT 1
76 # define SIMPLE_MODE_INT 2
77 # define MEMQ_MODE_INT 3
78 unsigned int intr[MAX_REPLY_QUEUES];
79 unsigned int msix_vector;
80 unsigned int msi_vector;
81 int intr_mode; /* either PERF_MODE_INT or SIMPLE_MODE_INT */
82 struct access_method access;
84 /* queue and queue Info */
85 struct list_head reqQ;
86 struct list_head cmpQ;
91 u8 max_cmd_sg_entries;
93 struct SGDescriptor **cmd_sg_list;
95 /* pointers to command and error info pool */
96 struct CommandList *cmd_pool;
97 dma_addr_t cmd_pool_dhandle;
98 struct ErrorInfo *errinfo_pool;
99 dma_addr_t errinfo_pool_dhandle;
100 unsigned long *cmd_pool_bits;
104 spinlock_t scan_lock;
105 wait_queue_head_t scan_wait_queue;
107 struct Scsi_Host *scsi_host;
108 spinlock_t devlock; /* to protect hba[ctlr]->dev[]; */
109 int ndevices; /* number of used elements in .dev[] array. */
110 struct hpsa_scsi_dev_t *dev[HPSA_MAX_DEVICES];
112 * Performant mode tables.
116 struct TransTable_struct *transtable;
117 unsigned long transMethod;
120 * Performant mode completion buffers
123 size_t reply_pool_size;
124 struct reply_pool reply_queue[MAX_REPLY_QUEUES];
126 dma_addr_t reply_pool_dhandle;
127 u32 *blockFetchTable;
128 unsigned char *hba_inquiry_data;
129 u64 last_intr_timestamp;
131 u64 last_heartbeat_timestamp;
132 u32 heartbeat_sample_interval;
133 atomic_t firmware_flash_in_progress;
135 struct list_head lockup_list;
136 /* Address of h->q[x] is passed to intr handler to know which queue */
137 u8 q[MAX_REPLY_QUEUES];
138 u32 TMFSupportFlags; /* cache what task mgmt funcs are supported. */
139 #define HPSATMF_BITS_SUPPORTED (1 << 0)
140 #define HPSATMF_PHYS_LUN_RESET (1 << 1)
141 #define HPSATMF_PHYS_NEX_RESET (1 << 2)
142 #define HPSATMF_PHYS_TASK_ABORT (1 << 3)
143 #define HPSATMF_PHYS_TSET_ABORT (1 << 4)
144 #define HPSATMF_PHYS_CLEAR_ACA (1 << 5)
145 #define HPSATMF_PHYS_CLEAR_TSET (1 << 6)
146 #define HPSATMF_PHYS_QRY_TASK (1 << 7)
147 #define HPSATMF_PHYS_QRY_TSET (1 << 8)
148 #define HPSATMF_PHYS_QRY_ASYNC (1 << 9)
149 #define HPSATMF_MASK_SUPPORTED (1 << 16)
150 #define HPSATMF_LOG_LUN_RESET (1 << 17)
151 #define HPSATMF_LOG_NEX_RESET (1 << 18)
152 #define HPSATMF_LOG_TASK_ABORT (1 << 19)
153 #define HPSATMF_LOG_TSET_ABORT (1 << 20)
154 #define HPSATMF_LOG_CLEAR_ACA (1 << 21)
155 #define HPSATMF_LOG_CLEAR_TSET (1 << 22)
156 #define HPSATMF_LOG_QRY_TASK (1 << 23)
157 #define HPSATMF_LOG_QRY_TSET (1 << 24)
158 #define HPSATMF_LOG_QRY_ASYNC (1 << 25)
160 #define HPSA_ABORT_MSG 0
161 #define HPSA_DEVICE_RESET_MSG 1
162 #define HPSA_RESET_TYPE_CONTROLLER 0x00
163 #define HPSA_RESET_TYPE_BUS 0x01
164 #define HPSA_RESET_TYPE_TARGET 0x03
165 #define HPSA_RESET_TYPE_LUN 0x04
166 #define HPSA_MSG_SEND_RETRY_LIMIT 10
167 #define HPSA_MSG_SEND_RETRY_INTERVAL_MSECS (10000)
169 /* Maximum time in seconds driver will wait for command completions
170 * when polling before giving up.
172 #define HPSA_MAX_POLL_TIME_SECS (20)
174 /* During SCSI error recovery, HPSA_TUR_RETRY_LIMIT defines
175 * how many times to retry TEST UNIT READY on a device
176 * while waiting for it to become ready before giving up.
177 * HPSA_MAX_WAIT_INTERVAL_SECS is the max wait interval
178 * between sending TURs while waiting for a device
181 #define HPSA_TUR_RETRY_LIMIT (20)
182 #define HPSA_MAX_WAIT_INTERVAL_SECS (30)
184 /* HPSA_BOARD_READY_WAIT_SECS is how long to wait for a board
185 * to become ready, in seconds, before giving up on it.
186 * HPSA_BOARD_READY_POLL_INTERVAL_MSECS * is how long to wait
187 * between polling the board to see if it is ready, in
188 * milliseconds. HPSA_BOARD_READY_POLL_INTERVAL and
189 * HPSA_BOARD_READY_ITERATIONS are derived from those.
191 #define HPSA_BOARD_READY_WAIT_SECS (120)
192 #define HPSA_BOARD_NOT_READY_WAIT_SECS (100)
193 #define HPSA_BOARD_READY_POLL_INTERVAL_MSECS (100)
194 #define HPSA_BOARD_READY_POLL_INTERVAL \
195 ((HPSA_BOARD_READY_POLL_INTERVAL_MSECS * HZ) / 1000)
196 #define HPSA_BOARD_READY_ITERATIONS \
197 ((HPSA_BOARD_READY_WAIT_SECS * 1000) / \
198 HPSA_BOARD_READY_POLL_INTERVAL_MSECS)
199 #define HPSA_BOARD_NOT_READY_ITERATIONS \
200 ((HPSA_BOARD_NOT_READY_WAIT_SECS * 1000) / \
201 HPSA_BOARD_READY_POLL_INTERVAL_MSECS)
202 #define HPSA_POST_RESET_PAUSE_MSECS (3000)
203 #define HPSA_POST_RESET_NOOP_RETRIES (12)
205 /* Defining the diffent access_menthods */
207 * Memory mapped FIFO interface (SMART 53xx cards)
209 #define SA5_DOORBELL 0x20
210 #define SA5_REQUEST_PORT_OFFSET 0x40
211 #define SA5_REPLY_INTR_MASK_OFFSET 0x34
212 #define SA5_REPLY_PORT_OFFSET 0x44
213 #define SA5_INTR_STATUS 0x30
214 #define SA5_SCRATCHPAD_OFFSET 0xB0
216 #define SA5_CTCFG_OFFSET 0xB4
217 #define SA5_CTMEM_OFFSET 0xB8
219 #define SA5_INTR_OFF 0x08
220 #define SA5B_INTR_OFF 0x04
221 #define SA5_INTR_PENDING 0x08
222 #define SA5B_INTR_PENDING 0x04
223 #define FIFO_EMPTY 0xffffffff
224 #define HPSA_FIRMWARE_READY 0xffff0000 /* value in scratchpad register */
226 #define HPSA_ERROR_BIT 0x02
228 /* Performant mode flags */
229 #define SA5_PERF_INTR_PENDING 0x04
230 #define SA5_PERF_INTR_OFF 0x05
231 #define SA5_OUTDB_STATUS_PERF_BIT 0x01
232 #define SA5_OUTDB_CLEAR_PERF_BIT 0x01
233 #define SA5_OUTDB_CLEAR 0xA0
234 #define SA5_OUTDB_CLEAR_PERF_BIT 0x01
235 #define SA5_OUTDB_STATUS 0x9C
238 #define HPSA_INTR_ON 1
239 #define HPSA_INTR_OFF 0
241 Send the command to the hardware
243 static void SA5_submit_command(struct ctlr_info *h,
244 struct CommandList *c)
246 dev_dbg(&h->pdev->dev, "Sending %x, tag = %x\n", c->busaddr,
247 c->Header.Tag.lower);
248 writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
249 (void) readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
253 * This card is the opposite of the other cards.
254 * 0 turns interrupts on...
255 * 0x08 turns them off...
257 static void SA5_intr_mask(struct ctlr_info *h, unsigned long val)
259 if (val) { /* Turn interrupts on */
260 h->interrupts_enabled = 1;
261 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
262 (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
263 } else { /* Turn them off */
264 h->interrupts_enabled = 0;
266 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
267 (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
271 static void SA5_performant_intr_mask(struct ctlr_info *h, unsigned long val)
273 if (val) { /* turn on interrupts */
274 h->interrupts_enabled = 1;
275 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
276 (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
278 h->interrupts_enabled = 0;
279 writel(SA5_PERF_INTR_OFF,
280 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
281 (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
285 static unsigned long SA5_performant_completed(struct ctlr_info *h, u8 q)
287 struct reply_pool *rq = &h->reply_queue[q];
288 unsigned long flags, register_value = FIFO_EMPTY;
290 /* msi auto clears the interrupt pending bit. */
291 if (!(h->msi_vector || h->msix_vector)) {
292 /* flush the controller write of the reply queue by reading
293 * outbound doorbell status register.
295 register_value = readl(h->vaddr + SA5_OUTDB_STATUS);
296 writel(SA5_OUTDB_CLEAR_PERF_BIT, h->vaddr + SA5_OUTDB_CLEAR);
297 /* Do a read in order to flush the write to the controller
300 register_value = readl(h->vaddr + SA5_OUTDB_STATUS);
303 if ((rq->head[rq->current_entry] & 1) == rq->wraparound) {
304 register_value = rq->head[rq->current_entry];
306 spin_lock_irqsave(&h->lock, flags);
307 h->commands_outstanding--;
308 spin_unlock_irqrestore(&h->lock, flags);
310 register_value = FIFO_EMPTY;
312 /* Check for wraparound */
313 if (rq->current_entry == h->max_commands) {
314 rq->current_entry = 0;
317 return register_value;
321 * Returns true if fifo is full.
324 static unsigned long SA5_fifo_full(struct ctlr_info *h)
326 if (h->commands_outstanding >= h->max_commands)
333 * returns value read from hardware.
334 * returns FIFO_EMPTY if there is nothing to read
336 static unsigned long SA5_completed(struct ctlr_info *h,
337 __attribute__((unused)) u8 q)
339 unsigned long register_value
340 = readl(h->vaddr + SA5_REPLY_PORT_OFFSET);
343 if (register_value != FIFO_EMPTY) {
344 spin_lock_irqsave(&h->lock, flags);
345 h->commands_outstanding--;
346 spin_unlock_irqrestore(&h->lock, flags);
350 if (register_value != FIFO_EMPTY)
351 dev_dbg(&h->pdev->dev, "Read %lx back from board\n",
354 dev_dbg(&h->pdev->dev, "FIFO Empty read\n");
357 return register_value;
360 * Returns true if an interrupt is pending..
362 static bool SA5_intr_pending(struct ctlr_info *h)
364 unsigned long register_value =
365 readl(h->vaddr + SA5_INTR_STATUS);
366 dev_dbg(&h->pdev->dev, "intr_pending %lx\n", register_value);
367 return register_value & SA5_INTR_PENDING;
370 static bool SA5_performant_intr_pending(struct ctlr_info *h)
372 unsigned long register_value = readl(h->vaddr + SA5_INTR_STATUS);
377 if (h->msi_vector || h->msix_vector)
380 /* Read outbound doorbell to flush */
381 register_value = readl(h->vaddr + SA5_OUTDB_STATUS);
382 return register_value & SA5_OUTDB_STATUS_PERF_BIT;
385 static struct access_method SA5_access = {
393 static struct access_method SA5_performant_access = {
395 SA5_performant_intr_mask,
397 SA5_performant_intr_pending,
398 SA5_performant_completed,
404 struct access_method *access;