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;
100 struct mutex busy_shutting_down;
101 struct list_head scan_list;
102 struct completion scan_wait;
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];
110 * Performant mode tables.
114 struct TransTable_struct *transtable;
115 unsigned long transMethod;
118 * Performant mode completion buffer
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;
128 #define HPSA_ABORT_MSG 0
129 #define HPSA_DEVICE_RESET_MSG 1
130 #define HPSA_BUS_RESET_MSG 2
131 #define HPSA_HOST_RESET_MSG 3
132 #define HPSA_MSG_SEND_RETRY_LIMIT 10
133 #define HPSA_MSG_SEND_RETRY_INTERVAL_MSECS 1000
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_READY_POLL_INTERVAL_MSECS (100)
159 #define HPSA_BOARD_READY_POLL_INTERVAL \
160 ((HPSA_BOARD_READY_POLL_INTERVAL_MSECS * HZ) / 1000)
161 #define HPSA_BOARD_READY_ITERATIONS \
162 ((HPSA_BOARD_READY_WAIT_SECS * 1000) / \
163 HPSA_BOARD_READY_POLL_INTERVAL_MSECS)
164 #define HPSA_POST_RESET_PAUSE_MSECS (3000)
165 #define HPSA_POST_RESET_NOOP_RETRIES (12)
167 /* Defining the diffent access_menthods */
169 * Memory mapped FIFO interface (SMART 53xx cards)
171 #define SA5_DOORBELL 0x20
172 #define SA5_REQUEST_PORT_OFFSET 0x40
173 #define SA5_REPLY_INTR_MASK_OFFSET 0x34
174 #define SA5_REPLY_PORT_OFFSET 0x44
175 #define SA5_INTR_STATUS 0x30
176 #define SA5_SCRATCHPAD_OFFSET 0xB0
178 #define SA5_CTCFG_OFFSET 0xB4
179 #define SA5_CTMEM_OFFSET 0xB8
181 #define SA5_INTR_OFF 0x08
182 #define SA5B_INTR_OFF 0x04
183 #define SA5_INTR_PENDING 0x08
184 #define SA5B_INTR_PENDING 0x04
185 #define FIFO_EMPTY 0xffffffff
186 #define HPSA_FIRMWARE_READY 0xffff0000 /* value in scratchpad register */
188 #define HPSA_ERROR_BIT 0x02
190 /* Performant mode flags */
191 #define SA5_PERF_INTR_PENDING 0x04
192 #define SA5_PERF_INTR_OFF 0x05
193 #define SA5_OUTDB_STATUS_PERF_BIT 0x01
194 #define SA5_OUTDB_CLEAR_PERF_BIT 0x01
195 #define SA5_OUTDB_CLEAR 0xA0
196 #define SA5_OUTDB_CLEAR_PERF_BIT 0x01
197 #define SA5_OUTDB_STATUS 0x9C
200 #define HPSA_INTR_ON 1
201 #define HPSA_INTR_OFF 0
203 Send the command to the hardware
205 static void SA5_submit_command(struct ctlr_info *h,
206 struct CommandList *c)
208 dev_dbg(&h->pdev->dev, "Sending %x, tag = %x\n", c->busaddr,
209 c->Header.Tag.lower);
210 writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
211 h->commands_outstanding++;
212 if (h->commands_outstanding > h->max_outstanding)
213 h->max_outstanding = h->commands_outstanding;
217 * This card is the opposite of the other cards.
218 * 0 turns interrupts on...
219 * 0x08 turns them off...
221 static void SA5_intr_mask(struct ctlr_info *h, unsigned long val)
223 if (val) { /* Turn interrupts on */
224 h->interrupts_enabled = 1;
225 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
226 } else { /* Turn them off */
227 h->interrupts_enabled = 0;
229 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
233 static void SA5_performant_intr_mask(struct ctlr_info *h, unsigned long val)
235 if (val) { /* turn on interrupts */
236 h->interrupts_enabled = 1;
237 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
239 h->interrupts_enabled = 0;
240 writel(SA5_PERF_INTR_OFF,
241 h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
245 static unsigned long SA5_performant_completed(struct ctlr_info *h)
247 unsigned long register_value = FIFO_EMPTY;
249 /* flush the controller write of the reply queue by reading
250 * outbound doorbell status register.
252 register_value = readl(h->vaddr + SA5_OUTDB_STATUS);
253 /* msi auto clears the interrupt pending bit. */
254 if (!(h->msi_vector || h->msix_vector)) {
255 writel(SA5_OUTDB_CLEAR_PERF_BIT, h->vaddr + SA5_OUTDB_CLEAR);
256 /* Do a read in order to flush the write to the controller
259 register_value = readl(h->vaddr + SA5_OUTDB_STATUS);
262 if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) {
263 register_value = *(h->reply_pool_head);
264 (h->reply_pool_head)++;
265 h->commands_outstanding--;
267 register_value = FIFO_EMPTY;
269 /* Check for wraparound */
270 if (h->reply_pool_head == (h->reply_pool + h->max_commands)) {
271 h->reply_pool_head = h->reply_pool;
272 h->reply_pool_wraparound ^= 1;
275 return register_value;
279 * Returns true if fifo is full.
282 static unsigned long SA5_fifo_full(struct ctlr_info *h)
284 if (h->commands_outstanding >= h->max_commands)
291 * returns value read from hardware.
292 * returns FIFO_EMPTY if there is nothing to read
294 static unsigned long SA5_completed(struct ctlr_info *h)
296 unsigned long register_value
297 = readl(h->vaddr + SA5_REPLY_PORT_OFFSET);
299 if (register_value != FIFO_EMPTY)
300 h->commands_outstanding--;
303 if (register_value != FIFO_EMPTY)
304 dev_dbg(&h->pdev->dev, "Read %lx back from board\n",
307 dev_dbg(&h->pdev->dev, "hpsa: FIFO Empty read\n");
310 return register_value;
313 * Returns true if an interrupt is pending..
315 static bool SA5_intr_pending(struct ctlr_info *h)
317 unsigned long register_value =
318 readl(h->vaddr + SA5_INTR_STATUS);
319 dev_dbg(&h->pdev->dev, "intr_pending %lx\n", register_value);
320 return register_value & SA5_INTR_PENDING;
323 static bool SA5_performant_intr_pending(struct ctlr_info *h)
325 unsigned long register_value = readl(h->vaddr + SA5_INTR_STATUS);
330 if (h->msi_vector || h->msix_vector)
333 /* Read outbound doorbell to flush */
334 register_value = readl(h->vaddr + SA5_OUTDB_STATUS);
335 return register_value & SA5_OUTDB_STATUS_PERF_BIT;
338 static struct access_method SA5_access = {
346 static struct access_method SA5_performant_access = {
348 SA5_performant_intr_mask,
350 SA5_performant_intr_pending,
351 SA5_performant_completed,
357 struct access_method *access;