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;
88 unsigned int maxQsinceinit;
92 u8 max_cmd_sg_entries;
94 struct SGDescriptor **cmd_sg_list;
96 /* pointers to command and error info pool */
97 struct CommandList *cmd_pool;
98 dma_addr_t cmd_pool_dhandle;
99 struct ErrorInfo *errinfo_pool;
100 dma_addr_t errinfo_pool_dhandle;
101 unsigned long *cmd_pool_bits;
105 spinlock_t scan_lock;
106 wait_queue_head_t scan_wait_queue;
108 struct Scsi_Host *scsi_host;
109 spinlock_t devlock; /* to protect hba[ctlr]->dev[]; */
110 int ndevices; /* number of used elements in .dev[] array. */
111 struct hpsa_scsi_dev_t *dev[HPSA_MAX_DEVICES];
113 * Performant mode tables.
117 struct TransTable_struct *transtable;
118 unsigned long transMethod;
121 * Performant mode completion buffers
124 size_t reply_pool_size;
125 struct reply_pool reply_queue[MAX_REPLY_QUEUES];
127 dma_addr_t reply_pool_dhandle;
128 u32 *blockFetchTable;
129 unsigned char *hba_inquiry_data;
130 u64 last_intr_timestamp;
132 u64 last_heartbeat_timestamp;
134 struct list_head lockup_list;
135 /* Address of h->q[x] is passed to intr handler to know which queue */
136 u8 q[MAX_REPLY_QUEUES];
137 u32 TMFSupportFlags; /* cache what task mgmt funcs are supported. */
138 #define HPSATMF_BITS_SUPPORTED (1 << 0)
139 #define HPSATMF_PHYS_LUN_RESET (1 << 1)
140 #define HPSATMF_PHYS_NEX_RESET (1 << 2)
141 #define HPSATMF_PHYS_TASK_ABORT (1 << 3)
142 #define HPSATMF_PHYS_TSET_ABORT (1 << 4)
143 #define HPSATMF_PHYS_CLEAR_ACA (1 << 5)
144 #define HPSATMF_PHYS_CLEAR_TSET (1 << 6)
145 #define HPSATMF_PHYS_QRY_TASK (1 << 7)
146 #define HPSATMF_PHYS_QRY_TSET (1 << 8)
147 #define HPSATMF_PHYS_QRY_ASYNC (1 << 9)
148 #define HPSATMF_MASK_SUPPORTED (1 << 16)
149 #define HPSATMF_LOG_LUN_RESET (1 << 17)
150 #define HPSATMF_LOG_NEX_RESET (1 << 18)
151 #define HPSATMF_LOG_TASK_ABORT (1 << 19)
152 #define HPSATMF_LOG_TSET_ABORT (1 << 20)
153 #define HPSATMF_LOG_CLEAR_ACA (1 << 21)
154 #define HPSATMF_LOG_CLEAR_TSET (1 << 22)
155 #define HPSATMF_LOG_QRY_TASK (1 << 23)
156 #define HPSATMF_LOG_QRY_TSET (1 << 24)
157 #define HPSATMF_LOG_QRY_ASYNC (1 << 25)
159 #define HPSA_ABORT_MSG 0
160 #define HPSA_DEVICE_RESET_MSG 1
161 #define HPSA_RESET_TYPE_CONTROLLER 0x00
162 #define HPSA_RESET_TYPE_BUS 0x01
163 #define HPSA_RESET_TYPE_TARGET 0x03
164 #define HPSA_RESET_TYPE_LUN 0x04
165 #define HPSA_MSG_SEND_RETRY_LIMIT 10
166 #define HPSA_MSG_SEND_RETRY_INTERVAL_MSECS (10000)
168 /* Maximum time in seconds driver will wait for command completions
169 * when polling before giving up.
171 #define HPSA_MAX_POLL_TIME_SECS (20)
173 /* During SCSI error recovery, HPSA_TUR_RETRY_LIMIT defines
174 * how many times to retry TEST UNIT READY on a device
175 * while waiting for it to become ready before giving up.
176 * HPSA_MAX_WAIT_INTERVAL_SECS is the max wait interval
177 * between sending TURs while waiting for a device
180 #define HPSA_TUR_RETRY_LIMIT (20)
181 #define HPSA_MAX_WAIT_INTERVAL_SECS (30)
183 /* HPSA_BOARD_READY_WAIT_SECS is how long to wait for a board
184 * to become ready, in seconds, before giving up on it.
185 * HPSA_BOARD_READY_POLL_INTERVAL_MSECS * is how long to wait
186 * between polling the board to see if it is ready, in
187 * milliseconds. HPSA_BOARD_READY_POLL_INTERVAL and
188 * HPSA_BOARD_READY_ITERATIONS are derived from those.
190 #define HPSA_BOARD_READY_WAIT_SECS (120)
191 #define HPSA_BOARD_NOT_READY_WAIT_SECS (100)
192 #define HPSA_BOARD_READY_POLL_INTERVAL_MSECS (100)
193 #define HPSA_BOARD_READY_POLL_INTERVAL \
194 ((HPSA_BOARD_READY_POLL_INTERVAL_MSECS * HZ) / 1000)
195 #define HPSA_BOARD_READY_ITERATIONS \
196 ((HPSA_BOARD_READY_WAIT_SECS * 1000) / \
197 HPSA_BOARD_READY_POLL_INTERVAL_MSECS)
198 #define HPSA_BOARD_NOT_READY_ITERATIONS \
199 ((HPSA_BOARD_NOT_READY_WAIT_SECS * 1000) / \
200 HPSA_BOARD_READY_POLL_INTERVAL_MSECS)
201 #define HPSA_POST_RESET_PAUSE_MSECS (3000)
202 #define HPSA_POST_RESET_NOOP_RETRIES (12)
204 /* Defining the diffent access_menthods */
206 * Memory mapped FIFO interface (SMART 53xx cards)
208 #define SA5_DOORBELL 0x20
209 #define SA5_REQUEST_PORT_OFFSET 0x40
210 #define SA5_REPLY_INTR_MASK_OFFSET 0x34
211 #define SA5_REPLY_PORT_OFFSET 0x44
212 #define SA5_INTR_STATUS 0x30
213 #define SA5_SCRATCHPAD_OFFSET 0xB0
215 #define SA5_CTCFG_OFFSET 0xB4
216 #define SA5_CTMEM_OFFSET 0xB8
218 #define SA5_INTR_OFF 0x08
219 #define SA5B_INTR_OFF 0x04
220 #define SA5_INTR_PENDING 0x08
221 #define SA5B_INTR_PENDING 0x04
222 #define FIFO_EMPTY 0xffffffff
223 #define HPSA_FIRMWARE_READY 0xffff0000 /* value in scratchpad register */
225 #define HPSA_ERROR_BIT 0x02
227 /* Performant mode flags */
228 #define SA5_PERF_INTR_PENDING 0x04
229 #define SA5_PERF_INTR_OFF 0x05
230 #define SA5_OUTDB_STATUS_PERF_BIT 0x01
231 #define SA5_OUTDB_CLEAR_PERF_BIT 0x01
232 #define SA5_OUTDB_CLEAR 0xA0
233 #define SA5_OUTDB_CLEAR_PERF_BIT 0x01
234 #define SA5_OUTDB_STATUS 0x9C
237 #define HPSA_INTR_ON 1
238 #define HPSA_INTR_OFF 0
240 Send the command to the hardware
242 static void SA5_submit_command(struct ctlr_info *h,
243 struct CommandList *c)
245 dev_dbg(&h->pdev->dev, "Sending %x, tag = %x\n", c->busaddr,
246 c->Header.Tag.lower);
247 writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
248 (void) readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
252 * This card is the opposite of the other cards.
253 * 0 turns interrupts on...
254 * 0x08 turns them off...
256 static void SA5_intr_mask(struct ctlr_info *h, unsigned long val)
258 if (val) { /* Turn interrupts on */
259 h->interrupts_enabled = 1;
260 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
261 (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
262 } else { /* Turn them off */
263 h->interrupts_enabled = 0;
265 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
266 (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
270 static void SA5_performant_intr_mask(struct ctlr_info *h, unsigned long val)
272 if (val) { /* turn on interrupts */
273 h->interrupts_enabled = 1;
274 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
275 (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
277 h->interrupts_enabled = 0;
278 writel(SA5_PERF_INTR_OFF,
279 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
280 (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
284 static unsigned long SA5_performant_completed(struct ctlr_info *h, u8 q)
286 struct reply_pool *rq = &h->reply_queue[q];
287 unsigned long flags, register_value = FIFO_EMPTY;
289 /* msi auto clears the interrupt pending bit. */
290 if (!(h->msi_vector || h->msix_vector)) {
291 /* flush the controller write of the reply queue by reading
292 * outbound doorbell status register.
294 register_value = readl(h->vaddr + SA5_OUTDB_STATUS);
295 writel(SA5_OUTDB_CLEAR_PERF_BIT, h->vaddr + SA5_OUTDB_CLEAR);
296 /* Do a read in order to flush the write to the controller
299 register_value = readl(h->vaddr + SA5_OUTDB_STATUS);
302 if ((rq->head[rq->current_entry] & 1) == rq->wraparound) {
303 register_value = rq->head[rq->current_entry];
305 spin_lock_irqsave(&h->lock, flags);
306 h->commands_outstanding--;
307 spin_unlock_irqrestore(&h->lock, flags);
309 register_value = FIFO_EMPTY;
311 /* Check for wraparound */
312 if (rq->current_entry == h->max_commands) {
313 rq->current_entry = 0;
316 return register_value;
320 * Returns true if fifo is full.
323 static unsigned long SA5_fifo_full(struct ctlr_info *h)
325 if (h->commands_outstanding >= h->max_commands)
332 * returns value read from hardware.
333 * returns FIFO_EMPTY if there is nothing to read
335 static unsigned long SA5_completed(struct ctlr_info *h,
336 __attribute__((unused)) u8 q)
338 unsigned long register_value
339 = readl(h->vaddr + SA5_REPLY_PORT_OFFSET);
342 if (register_value != FIFO_EMPTY) {
343 spin_lock_irqsave(&h->lock, flags);
344 h->commands_outstanding--;
345 spin_unlock_irqrestore(&h->lock, flags);
349 if (register_value != FIFO_EMPTY)
350 dev_dbg(&h->pdev->dev, "Read %lx back from board\n",
353 dev_dbg(&h->pdev->dev, "FIFO Empty read\n");
356 return register_value;
359 * Returns true if an interrupt is pending..
361 static bool SA5_intr_pending(struct ctlr_info *h)
363 unsigned long register_value =
364 readl(h->vaddr + SA5_INTR_STATUS);
365 dev_dbg(&h->pdev->dev, "intr_pending %lx\n", register_value);
366 return register_value & SA5_INTR_PENDING;
369 static bool SA5_performant_intr_pending(struct ctlr_info *h)
371 unsigned long register_value = readl(h->vaddr + SA5_INTR_STATUS);
376 if (h->msi_vector || h->msix_vector)
379 /* Read outbound doorbell to flush */
380 register_value = readl(h->vaddr + SA5_OUTDB_STATUS);
381 return register_value & SA5_OUTDB_STATUS_PERF_BIT;
384 static struct access_method SA5_access = {
392 static struct access_method SA5_performant_access = {
394 SA5_performant_intr_mask,
396 SA5_performant_intr_pending,
397 SA5_performant_completed,
403 struct access_method *access;