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);
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 revision[4]; /* bytes 32-35 of inquiry data */
49 unsigned char raid_level; /* from inquiry page 0xC1 */
56 char firm_ver[4]; /* Firmware version */
61 int nr_cmds; /* Number of commands allowed on this controller */
62 struct CfgTable __iomem *cfgtable;
64 int interrupts_enabled;
67 int commands_outstanding;
68 int max_outstanding; /* Debug */
69 int usage_count; /* number of opens all all minor devices */
70 # define PERF_MODE_INT 0
71 # define DOORBELL_INT 1
72 # define SIMPLE_MODE_INT 2
73 # define MEMQ_MODE_INT 3
75 unsigned int msix_vector;
76 unsigned int msi_vector;
77 struct access_method access;
79 /* queue and queue Info */
80 struct hlist_head reqQ;
81 struct hlist_head cmpQ;
83 unsigned int maxQsinceinit;
87 /* pointers to command and error info pool */
88 struct CommandList *cmd_pool;
89 dma_addr_t cmd_pool_dhandle;
90 struct ErrorInfo *errinfo_pool;
91 dma_addr_t errinfo_pool_dhandle;
92 unsigned long *cmd_pool_bits;
95 int busy_initializing;
99 wait_queue_head_t scan_wait_queue;
101 struct Scsi_Host *scsi_host;
102 spinlock_t devlock; /* to protect hba[ctlr]->dev[]; */
103 int ndevices; /* number of used elements in .dev[] array. */
104 #define HPSA_MAX_SCSI_DEVS_PER_HBA 256
105 struct hpsa_scsi_dev_t *dev[HPSA_MAX_SCSI_DEVS_PER_HBA];
107 * Performant mode tables.
111 struct TransTable_struct *transtable;
112 unsigned long transMethod;
115 * Performant mode completion buffer
118 dma_addr_t reply_pool_dhandle;
119 u64 *reply_pool_head;
120 size_t reply_pool_size;
121 unsigned char reply_pool_wraparound;
122 u32 *blockFetchTable;
123 unsigned char *hba_inquiry_data;
125 #define HPSA_ABORT_MSG 0
126 #define HPSA_DEVICE_RESET_MSG 1
127 #define HPSA_BUS_RESET_MSG 2
128 #define HPSA_HOST_RESET_MSG 3
129 #define HPSA_MSG_SEND_RETRY_LIMIT 10
130 #define HPSA_MSG_SEND_RETRY_INTERVAL_MSECS 1000
132 /* Maximum time in seconds driver will wait for command completions
133 * when polling before giving up.
135 #define HPSA_MAX_POLL_TIME_SECS (20)
137 /* During SCSI error recovery, HPSA_TUR_RETRY_LIMIT defines
138 * how many times to retry TEST UNIT READY on a device
139 * while waiting for it to become ready before giving up.
140 * HPSA_MAX_WAIT_INTERVAL_SECS is the max wait interval
141 * between sending TURs while waiting for a device
144 #define HPSA_TUR_RETRY_LIMIT (20)
145 #define HPSA_MAX_WAIT_INTERVAL_SECS (30)
147 /* HPSA_BOARD_READY_WAIT_SECS is how long to wait for a board
148 * to become ready, in seconds, before giving up on it.
149 * HPSA_BOARD_READY_POLL_INTERVAL_MSECS * is how long to wait
150 * between polling the board to see if it is ready, in
151 * milliseconds. HPSA_BOARD_READY_POLL_INTERVAL and
152 * HPSA_BOARD_READY_ITERATIONS are derived from those.
154 #define HPSA_BOARD_READY_WAIT_SECS (120)
155 #define HPSA_BOARD_READY_POLL_INTERVAL_MSECS (100)
156 #define HPSA_BOARD_READY_POLL_INTERVAL \
157 ((HPSA_BOARD_READY_POLL_INTERVAL_MSECS * HZ) / 1000)
158 #define HPSA_BOARD_READY_ITERATIONS \
159 ((HPSA_BOARD_READY_WAIT_SECS * 1000) / \
160 HPSA_BOARD_READY_POLL_INTERVAL_MSECS)
161 #define HPSA_POST_RESET_PAUSE_MSECS (3000)
162 #define HPSA_POST_RESET_NOOP_RETRIES (12)
164 /* Defining the diffent access_menthods */
166 * Memory mapped FIFO interface (SMART 53xx cards)
168 #define SA5_DOORBELL 0x20
169 #define SA5_REQUEST_PORT_OFFSET 0x40
170 #define SA5_REPLY_INTR_MASK_OFFSET 0x34
171 #define SA5_REPLY_PORT_OFFSET 0x44
172 #define SA5_INTR_STATUS 0x30
173 #define SA5_SCRATCHPAD_OFFSET 0xB0
175 #define SA5_CTCFG_OFFSET 0xB4
176 #define SA5_CTMEM_OFFSET 0xB8
178 #define SA5_INTR_OFF 0x08
179 #define SA5B_INTR_OFF 0x04
180 #define SA5_INTR_PENDING 0x08
181 #define SA5B_INTR_PENDING 0x04
182 #define FIFO_EMPTY 0xffffffff
183 #define HPSA_FIRMWARE_READY 0xffff0000 /* value in scratchpad register */
185 #define HPSA_ERROR_BIT 0x02
187 /* Performant mode flags */
188 #define SA5_PERF_INTR_PENDING 0x04
189 #define SA5_PERF_INTR_OFF 0x05
190 #define SA5_OUTDB_STATUS_PERF_BIT 0x01
191 #define SA5_OUTDB_CLEAR_PERF_BIT 0x01
192 #define SA5_OUTDB_CLEAR 0xA0
193 #define SA5_OUTDB_CLEAR_PERF_BIT 0x01
194 #define SA5_OUTDB_STATUS 0x9C
197 #define HPSA_INTR_ON 1
198 #define HPSA_INTR_OFF 0
200 Send the command to the hardware
202 static void SA5_submit_command(struct ctlr_info *h,
203 struct CommandList *c)
205 dev_dbg(&h->pdev->dev, "Sending %x, tag = %x\n", c->busaddr,
206 c->Header.Tag.lower);
207 writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
208 h->commands_outstanding++;
209 if (h->commands_outstanding > h->max_outstanding)
210 h->max_outstanding = h->commands_outstanding;
214 * This card is the opposite of the other cards.
215 * 0 turns interrupts on...
216 * 0x08 turns them off...
218 static void SA5_intr_mask(struct ctlr_info *h, unsigned long val)
220 if (val) { /* Turn interrupts on */
221 h->interrupts_enabled = 1;
222 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
223 } else { /* Turn them off */
224 h->interrupts_enabled = 0;
226 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
230 static void SA5_performant_intr_mask(struct ctlr_info *h, unsigned long val)
232 if (val) { /* turn on interrupts */
233 h->interrupts_enabled = 1;
234 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
236 h->interrupts_enabled = 0;
237 writel(SA5_PERF_INTR_OFF,
238 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
242 static unsigned long SA5_performant_completed(struct ctlr_info *h)
244 unsigned long register_value = FIFO_EMPTY;
246 /* flush the controller write of the reply queue by reading
247 * outbound doorbell status register.
249 register_value = readl(h->vaddr + SA5_OUTDB_STATUS);
250 /* msi auto clears the interrupt pending bit. */
251 if (!(h->msi_vector || h->msix_vector)) {
252 writel(SA5_OUTDB_CLEAR_PERF_BIT, h->vaddr + SA5_OUTDB_CLEAR);
253 /* Do a read in order to flush the write to the controller
256 register_value = readl(h->vaddr + SA5_OUTDB_STATUS);
259 if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) {
260 register_value = *(h->reply_pool_head);
261 (h->reply_pool_head)++;
262 h->commands_outstanding--;
264 register_value = FIFO_EMPTY;
266 /* Check for wraparound */
267 if (h->reply_pool_head == (h->reply_pool + h->max_commands)) {
268 h->reply_pool_head = h->reply_pool;
269 h->reply_pool_wraparound ^= 1;
272 return register_value;
276 * Returns true if fifo is full.
279 static unsigned long SA5_fifo_full(struct ctlr_info *h)
281 if (h->commands_outstanding >= h->max_commands)
288 * returns value read from hardware.
289 * returns FIFO_EMPTY if there is nothing to read
291 static unsigned long SA5_completed(struct ctlr_info *h)
293 unsigned long register_value
294 = readl(h->vaddr + SA5_REPLY_PORT_OFFSET);
296 if (register_value != FIFO_EMPTY)
297 h->commands_outstanding--;
300 if (register_value != FIFO_EMPTY)
301 dev_dbg(&h->pdev->dev, "Read %lx back from board\n",
304 dev_dbg(&h->pdev->dev, "hpsa: FIFO Empty read\n");
307 return register_value;
310 * Returns true if an interrupt is pending..
312 static bool SA5_intr_pending(struct ctlr_info *h)
314 unsigned long register_value =
315 readl(h->vaddr + SA5_INTR_STATUS);
316 dev_dbg(&h->pdev->dev, "intr_pending %lx\n", register_value);
317 return register_value & SA5_INTR_PENDING;
320 static bool SA5_performant_intr_pending(struct ctlr_info *h)
322 unsigned long register_value = readl(h->vaddr + SA5_INTR_STATUS);
327 if (h->msi_vector || h->msix_vector)
330 /* Read outbound doorbell to flush */
331 register_value = readl(h->vaddr + SA5_OUTDB_STATUS);
332 return register_value & SA5_OUTDB_STATUS_PERF_BIT;
335 static struct access_method SA5_access = {
343 static struct access_method SA5_performant_access = {
345 SA5_performant_intr_mask,
347 SA5_performant_intr_pending,
348 SA5_performant_completed,
354 struct access_method *access;