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.
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);
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 */
59 int nr_cmds; /* Number of commands allowed on this controller */
60 struct CfgTable __iomem *cfgtable;
62 int interrupts_enabled;
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
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;
78 /* queue and queue Info */
79 struct list_head reqQ;
80 struct list_head cmpQ;
82 unsigned int maxQsinceinit;
86 u8 max_cmd_sg_entries;
88 struct SGDescriptor **cmd_sg_list;
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;
100 wait_queue_head_t scan_wait_queue;
102 struct Scsi_Host *scsi_host;
103 spinlock_t devlock; /* to protect hba[ctlr]->dev[]; */
104 int ndevices; /* number of used elements in .dev[] array. */
105 #define HPSA_MAX_SCSI_DEVS_PER_HBA 256
106 struct hpsa_scsi_dev_t *dev[HPSA_MAX_SCSI_DEVS_PER_HBA];
108 * Performant mode tables.
112 struct TransTable_struct *transtable;
113 unsigned long transMethod;
116 * Performant mode completion buffer
119 dma_addr_t reply_pool_dhandle;
120 u64 *reply_pool_head;
121 size_t reply_pool_size;
122 unsigned char reply_pool_wraparound;
123 u32 *blockFetchTable;
124 unsigned char *hba_inquiry_data;
126 #define HPSA_ABORT_MSG 0
127 #define HPSA_DEVICE_RESET_MSG 1
128 #define HPSA_RESET_TYPE_CONTROLLER 0x00
129 #define HPSA_RESET_TYPE_BUS 0x01
130 #define HPSA_RESET_TYPE_TARGET 0x03
131 #define HPSA_RESET_TYPE_LUN 0x04
132 #define HPSA_MSG_SEND_RETRY_LIMIT 10
133 #define HPSA_MSG_SEND_RETRY_INTERVAL_MSECS (10000)
135 /* Maximum time in seconds driver will wait for command completions
136 * when polling before giving up.
138 #define HPSA_MAX_POLL_TIME_SECS (20)
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
147 #define HPSA_TUR_RETRY_LIMIT (20)
148 #define HPSA_MAX_WAIT_INTERVAL_SECS (30)
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.
157 #define HPSA_BOARD_READY_WAIT_SECS (120)
158 #define HPSA_BOARD_NOT_READY_WAIT_SECS (100)
159 #define HPSA_BOARD_READY_POLL_INTERVAL_MSECS (100)
160 #define HPSA_BOARD_READY_POLL_INTERVAL \
161 ((HPSA_BOARD_READY_POLL_INTERVAL_MSECS * HZ) / 1000)
162 #define HPSA_BOARD_READY_ITERATIONS \
163 ((HPSA_BOARD_READY_WAIT_SECS * 1000) / \
164 HPSA_BOARD_READY_POLL_INTERVAL_MSECS)
165 #define HPSA_BOARD_NOT_READY_ITERATIONS \
166 ((HPSA_BOARD_NOT_READY_WAIT_SECS * 1000) / \
167 HPSA_BOARD_READY_POLL_INTERVAL_MSECS)
168 #define HPSA_POST_RESET_PAUSE_MSECS (3000)
169 #define HPSA_POST_RESET_NOOP_RETRIES (12)
171 /* Defining the diffent access_menthods */
173 * Memory mapped FIFO interface (SMART 53xx cards)
175 #define SA5_DOORBELL 0x20
176 #define SA5_REQUEST_PORT_OFFSET 0x40
177 #define SA5_REPLY_INTR_MASK_OFFSET 0x34
178 #define SA5_REPLY_PORT_OFFSET 0x44
179 #define SA5_INTR_STATUS 0x30
180 #define SA5_SCRATCHPAD_OFFSET 0xB0
182 #define SA5_CTCFG_OFFSET 0xB4
183 #define SA5_CTMEM_OFFSET 0xB8
185 #define SA5_INTR_OFF 0x08
186 #define SA5B_INTR_OFF 0x04
187 #define SA5_INTR_PENDING 0x08
188 #define SA5B_INTR_PENDING 0x04
189 #define FIFO_EMPTY 0xffffffff
190 #define HPSA_FIRMWARE_READY 0xffff0000 /* value in scratchpad register */
192 #define HPSA_ERROR_BIT 0x02
194 /* Performant mode flags */
195 #define SA5_PERF_INTR_PENDING 0x04
196 #define SA5_PERF_INTR_OFF 0x05
197 #define SA5_OUTDB_STATUS_PERF_BIT 0x01
198 #define SA5_OUTDB_CLEAR_PERF_BIT 0x01
199 #define SA5_OUTDB_CLEAR 0xA0
200 #define SA5_OUTDB_CLEAR_PERF_BIT 0x01
201 #define SA5_OUTDB_STATUS 0x9C
204 #define HPSA_INTR_ON 1
205 #define HPSA_INTR_OFF 0
207 Send the command to the hardware
209 static void SA5_submit_command(struct ctlr_info *h,
210 struct CommandList *c)
212 dev_dbg(&h->pdev->dev, "Sending %x, tag = %x\n", c->busaddr,
213 c->Header.Tag.lower);
214 writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
215 (void) readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
216 h->commands_outstanding++;
217 if (h->commands_outstanding > h->max_outstanding)
218 h->max_outstanding = h->commands_outstanding;
222 * This card is the opposite of the other cards.
223 * 0 turns interrupts on...
224 * 0x08 turns them off...
226 static void SA5_intr_mask(struct ctlr_info *h, unsigned long val)
228 if (val) { /* Turn interrupts on */
229 h->interrupts_enabled = 1;
230 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
231 (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
232 } else { /* Turn them off */
233 h->interrupts_enabled = 0;
235 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
236 (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
240 static void SA5_performant_intr_mask(struct ctlr_info *h, unsigned long val)
242 if (val) { /* turn on interrupts */
243 h->interrupts_enabled = 1;
244 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
245 (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
247 h->interrupts_enabled = 0;
248 writel(SA5_PERF_INTR_OFF,
249 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
250 (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
254 static unsigned long SA5_performant_completed(struct ctlr_info *h)
256 unsigned long register_value = FIFO_EMPTY;
258 /* flush the controller write of the reply queue by reading
259 * outbound doorbell status register.
261 register_value = readl(h->vaddr + SA5_OUTDB_STATUS);
262 /* msi auto clears the interrupt pending bit. */
263 if (!(h->msi_vector || h->msix_vector)) {
264 writel(SA5_OUTDB_CLEAR_PERF_BIT, h->vaddr + SA5_OUTDB_CLEAR);
265 /* Do a read in order to flush the write to the controller
268 register_value = readl(h->vaddr + SA5_OUTDB_STATUS);
271 if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) {
272 register_value = *(h->reply_pool_head);
273 (h->reply_pool_head)++;
274 h->commands_outstanding--;
276 register_value = FIFO_EMPTY;
278 /* Check for wraparound */
279 if (h->reply_pool_head == (h->reply_pool + h->max_commands)) {
280 h->reply_pool_head = h->reply_pool;
281 h->reply_pool_wraparound ^= 1;
284 return register_value;
288 * Returns true if fifo is full.
291 static unsigned long SA5_fifo_full(struct ctlr_info *h)
293 if (h->commands_outstanding >= h->max_commands)
300 * returns value read from hardware.
301 * returns FIFO_EMPTY if there is nothing to read
303 static unsigned long SA5_completed(struct ctlr_info *h)
305 unsigned long register_value
306 = readl(h->vaddr + SA5_REPLY_PORT_OFFSET);
308 if (register_value != FIFO_EMPTY)
309 h->commands_outstanding--;
312 if (register_value != FIFO_EMPTY)
313 dev_dbg(&h->pdev->dev, "Read %lx back from board\n",
316 dev_dbg(&h->pdev->dev, "hpsa: FIFO Empty read\n");
319 return register_value;
322 * Returns true if an interrupt is pending..
324 static bool SA5_intr_pending(struct ctlr_info *h)
326 unsigned long register_value =
327 readl(h->vaddr + SA5_INTR_STATUS);
328 dev_dbg(&h->pdev->dev, "intr_pending %lx\n", register_value);
329 return register_value & SA5_INTR_PENDING;
332 static bool SA5_performant_intr_pending(struct ctlr_info *h)
334 unsigned long register_value = readl(h->vaddr + SA5_INTR_STATUS);
339 if (h->msi_vector || h->msix_vector)
342 /* Read outbound doorbell to flush */
343 register_value = readl(h->vaddr + SA5_OUTDB_STATUS);
344 return register_value & SA5_OUTDB_STATUS_PERF_BIT;
347 static struct access_method SA5_access = {
355 static struct access_method SA5_performant_access = {
357 SA5_performant_intr_mask,
359 SA5_performant_intr_pending,
360 SA5_performant_completed,
366 struct access_method *access;