Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * sx8.c: Driver for Promise SATA SX8 looks-like-I2O hardware | |
3 | * | |
2d5a2ae5 | 4 | * Copyright 2004-2005 Red Hat, Inc. |
1da177e4 LT |
5 | * |
6 | * Author/maintainer: Jeff Garzik <jgarzik@pobox.com> | |
7 | * | |
8 | * This file is subject to the terms and conditions of the GNU General Public | |
9 | * License. See the file "COPYING" in the main directory of this archive | |
10 | * for more details. | |
11 | */ | |
12 | ||
13 | #include <linux/kernel.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/init.h> | |
16 | #include <linux/pci.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/spinlock.h> | |
19 | #include <linux/blkdev.h> | |
20 | #include <linux/sched.h> | |
1da177e4 LT |
21 | #include <linux/interrupt.h> |
22 | #include <linux/compiler.h> | |
23 | #include <linux/workqueue.h> | |
24 | #include <linux/bitops.h> | |
25 | #include <linux/delay.h> | |
26 | #include <linux/time.h> | |
27 | #include <linux/hdreg.h> | |
a3948663 | 28 | #include <linux/dma-mapping.h> |
906c3b75 | 29 | #include <linux/completion.h> |
11763609 | 30 | #include <linux/scatterlist.h> |
1da177e4 | 31 | #include <asm/io.h> |
1da177e4 LT |
32 | #include <asm/uaccess.h> |
33 | ||
1da177e4 LT |
34 | #if 0 |
35 | #define CARM_DEBUG | |
36 | #define CARM_VERBOSE_DEBUG | |
37 | #else | |
38 | #undef CARM_DEBUG | |
39 | #undef CARM_VERBOSE_DEBUG | |
40 | #endif | |
41 | #undef CARM_NDEBUG | |
42 | ||
43 | #define DRV_NAME "sx8" | |
2d5a2ae5 | 44 | #define DRV_VERSION "1.0" |
1da177e4 LT |
45 | #define PFX DRV_NAME ": " |
46 | ||
2d5a2ae5 JG |
47 | MODULE_AUTHOR("Jeff Garzik"); |
48 | MODULE_LICENSE("GPL"); | |
49 | MODULE_DESCRIPTION("Promise SATA SX8 block driver"); | |
50 | MODULE_VERSION(DRV_VERSION); | |
51 | ||
52 | /* | |
53 | * SX8 hardware has a single message queue for all ATA ports. | |
54 | * When this driver was written, the hardware (firmware?) would | |
55 | * corrupt data eventually, if more than one request was outstanding. | |
56 | * As one can imagine, having 8 ports bottlenecking on a single | |
57 | * command hurts performance. | |
58 | * | |
59 | * Based on user reports, later versions of the hardware (firmware?) | |
60 | * seem to be able to survive with more than one command queued. | |
61 | * | |
62 | * Therefore, we default to the safe option -- 1 command -- but | |
63 | * allow the user to increase this. | |
64 | * | |
65 | * SX8 should be able to support up to ~60 queued commands (CARM_MAX_REQ), | |
66 | * but problems seem to occur when you exceed ~30, even on newer hardware. | |
67 | */ | |
68 | static int max_queue = 1; | |
69 | module_param(max_queue, int, 0444); | |
70 | MODULE_PARM_DESC(max_queue, "Maximum number of queued commands. (min==1, max==30, safe==1)"); | |
71 | ||
72 | ||
1da177e4 LT |
73 | #define NEXT_RESP(idx) ((idx + 1) % RMSG_Q_LEN) |
74 | ||
75 | /* 0xf is just arbitrary, non-zero noise; this is sorta like poisoning */ | |
76 | #define TAG_ENCODE(tag) (((tag) << 16) | 0xf) | |
77 | #define TAG_DECODE(tag) (((tag) >> 16) & 0x1f) | |
78 | #define TAG_VALID(tag) ((((tag) & 0xf) == 0xf) && (TAG_DECODE(tag) < 32)) | |
79 | ||
80 | /* note: prints function name for you */ | |
81 | #ifdef CARM_DEBUG | |
cece9339 | 82 | #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args) |
1da177e4 | 83 | #ifdef CARM_VERBOSE_DEBUG |
cece9339 | 84 | #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args) |
1da177e4 LT |
85 | #else |
86 | #define VPRINTK(fmt, args...) | |
87 | #endif /* CARM_VERBOSE_DEBUG */ | |
88 | #else | |
89 | #define DPRINTK(fmt, args...) | |
90 | #define VPRINTK(fmt, args...) | |
91 | #endif /* CARM_DEBUG */ | |
92 | ||
93 | #ifdef CARM_NDEBUG | |
94 | #define assert(expr) | |
95 | #else | |
96 | #define assert(expr) \ | |
97 | if(unlikely(!(expr))) { \ | |
98 | printk(KERN_ERR "Assertion failed! %s,%s,%s,line=%d\n", \ | |
cece9339 | 99 | #expr, __FILE__, __func__, __LINE__); \ |
1da177e4 LT |
100 | } |
101 | #endif | |
102 | ||
103 | /* defines only for the constants which don't work well as enums */ | |
104 | struct carm_host; | |
105 | ||
106 | enum { | |
107 | /* adapter-wide limits */ | |
108 | CARM_MAX_PORTS = 8, | |
109 | CARM_SHM_SIZE = (4096 << 7), | |
110 | CARM_MINORS_PER_MAJOR = 256 / CARM_MAX_PORTS, | |
111 | CARM_MAX_WAIT_Q = CARM_MAX_PORTS + 1, | |
112 | ||
113 | /* command message queue limits */ | |
114 | CARM_MAX_REQ = 64, /* max command msgs per host */ | |
1da177e4 LT |
115 | CARM_MSG_LOW_WATER = (CARM_MAX_REQ / 4), /* refill mark */ |
116 | ||
117 | /* S/G limits, host-wide and per-request */ | |
118 | CARM_MAX_REQ_SG = 32, /* max s/g entries per request */ | |
1da177e4 LT |
119 | CARM_MAX_HOST_SG = 600, /* max s/g entries per host */ |
120 | CARM_SG_LOW_WATER = (CARM_MAX_HOST_SG / 4), /* re-fill mark */ | |
121 | ||
122 | /* hardware registers */ | |
123 | CARM_IHQP = 0x1c, | |
124 | CARM_INT_STAT = 0x10, /* interrupt status */ | |
125 | CARM_INT_MASK = 0x14, /* interrupt mask */ | |
126 | CARM_HMUC = 0x18, /* host message unit control */ | |
127 | RBUF_ADDR_LO = 0x20, /* response msg DMA buf low 32 bits */ | |
128 | RBUF_ADDR_HI = 0x24, /* response msg DMA buf high 32 bits */ | |
129 | RBUF_BYTE_SZ = 0x28, | |
130 | CARM_RESP_IDX = 0x2c, | |
131 | CARM_CMS0 = 0x30, /* command message size reg 0 */ | |
132 | CARM_LMUC = 0x48, | |
133 | CARM_HMPHA = 0x6c, | |
134 | CARM_INITC = 0xb5, | |
135 | ||
136 | /* bits in CARM_INT_{STAT,MASK} */ | |
137 | INT_RESERVED = 0xfffffff0, | |
138 | INT_WATCHDOG = (1 << 3), /* watchdog timer */ | |
139 | INT_Q_OVERFLOW = (1 << 2), /* cmd msg q overflow */ | |
140 | INT_Q_AVAILABLE = (1 << 1), /* cmd msg q has free space */ | |
141 | INT_RESPONSE = (1 << 0), /* response msg available */ | |
142 | INT_ACK_MASK = INT_WATCHDOG | INT_Q_OVERFLOW, | |
143 | INT_DEF_MASK = INT_RESERVED | INT_Q_OVERFLOW | | |
144 | INT_RESPONSE, | |
145 | ||
146 | /* command messages, and related register bits */ | |
147 | CARM_HAVE_RESP = 0x01, | |
148 | CARM_MSG_READ = 1, | |
149 | CARM_MSG_WRITE = 2, | |
150 | CARM_MSG_VERIFY = 3, | |
151 | CARM_MSG_GET_CAPACITY = 4, | |
152 | CARM_MSG_FLUSH = 5, | |
153 | CARM_MSG_IOCTL = 6, | |
154 | CARM_MSG_ARRAY = 8, | |
155 | CARM_MSG_MISC = 9, | |
156 | CARM_CME = (1 << 2), | |
157 | CARM_RME = (1 << 1), | |
158 | CARM_WZBC = (1 << 0), | |
159 | CARM_RMI = (1 << 0), | |
160 | CARM_Q_FULL = (1 << 3), | |
161 | CARM_MSG_SIZE = 288, | |
162 | CARM_Q_LEN = 48, | |
163 | ||
164 | /* CARM_MSG_IOCTL messages */ | |
165 | CARM_IOC_SCAN_CHAN = 5, /* scan channels for devices */ | |
166 | CARM_IOC_GET_TCQ = 13, /* get tcq/ncq depth */ | |
167 | CARM_IOC_SET_TCQ = 14, /* set tcq/ncq depth */ | |
168 | ||
169 | IOC_SCAN_CHAN_NODEV = 0x1f, | |
170 | IOC_SCAN_CHAN_OFFSET = 0x40, | |
171 | ||
172 | /* CARM_MSG_ARRAY messages */ | |
173 | CARM_ARRAY_INFO = 0, | |
174 | ||
175 | ARRAY_NO_EXIST = (1 << 31), | |
176 | ||
177 | /* response messages */ | |
178 | RMSG_SZ = 8, /* sizeof(struct carm_response) */ | |
179 | RMSG_Q_LEN = 48, /* resp. msg list length */ | |
180 | RMSG_OK = 1, /* bit indicating msg was successful */ | |
181 | /* length of entire resp. msg buffer */ | |
182 | RBUF_LEN = RMSG_SZ * RMSG_Q_LEN, | |
183 | ||
184 | PDC_SHM_SIZE = (4096 << 7), /* length of entire h/w buffer */ | |
185 | ||
186 | /* CARM_MSG_MISC messages */ | |
187 | MISC_GET_FW_VER = 2, | |
188 | MISC_ALLOC_MEM = 3, | |
189 | MISC_SET_TIME = 5, | |
190 | ||
191 | /* MISC_GET_FW_VER feature bits */ | |
192 | FW_VER_4PORT = (1 << 2), /* 1=4 ports, 0=8 ports */ | |
193 | FW_VER_NON_RAID = (1 << 1), /* 1=non-RAID firmware, 0=RAID */ | |
194 | FW_VER_ZCR = (1 << 0), /* zero channel RAID (whatever that is) */ | |
195 | ||
196 | /* carm_host flags */ | |
197 | FL_NON_RAID = FW_VER_NON_RAID, | |
198 | FL_4PORT = FW_VER_4PORT, | |
199 | FL_FW_VER_MASK = (FW_VER_NON_RAID | FW_VER_4PORT), | |
200 | FL_DAC = (1 << 16), | |
201 | FL_DYN_MAJOR = (1 << 17), | |
202 | }; | |
203 | ||
2d5a2ae5 JG |
204 | enum { |
205 | CARM_SG_BOUNDARY = 0xffffUL, /* s/g segment boundary */ | |
206 | }; | |
207 | ||
1da177e4 LT |
208 | enum scatter_gather_types { |
209 | SGT_32BIT = 0, | |
210 | SGT_64BIT = 1, | |
211 | }; | |
212 | ||
213 | enum host_states { | |
214 | HST_INVALID, /* invalid state; never used */ | |
215 | HST_ALLOC_BUF, /* setting up master SHM area */ | |
216 | HST_ERROR, /* we never leave here */ | |
217 | HST_PORT_SCAN, /* start dev scan */ | |
218 | HST_DEV_SCAN_START, /* start per-device probe */ | |
219 | HST_DEV_SCAN, /* continue per-device probe */ | |
220 | HST_DEV_ACTIVATE, /* activate devices we found */ | |
221 | HST_PROBE_FINISHED, /* probe is complete */ | |
222 | HST_PROBE_START, /* initiate probe */ | |
223 | HST_SYNC_TIME, /* tell firmware what time it is */ | |
224 | HST_GET_FW_VER, /* get firmware version, adapter port cnt */ | |
225 | }; | |
226 | ||
227 | #ifdef CARM_DEBUG | |
228 | static const char *state_name[] = { | |
229 | "HST_INVALID", | |
230 | "HST_ALLOC_BUF", | |
231 | "HST_ERROR", | |
232 | "HST_PORT_SCAN", | |
233 | "HST_DEV_SCAN_START", | |
234 | "HST_DEV_SCAN", | |
235 | "HST_DEV_ACTIVATE", | |
236 | "HST_PROBE_FINISHED", | |
237 | "HST_PROBE_START", | |
238 | "HST_SYNC_TIME", | |
239 | "HST_GET_FW_VER", | |
240 | }; | |
241 | #endif | |
242 | ||
243 | struct carm_port { | |
244 | unsigned int port_no; | |
1da177e4 LT |
245 | struct gendisk *disk; |
246 | struct carm_host *host; | |
247 | ||
248 | /* attached device characteristics */ | |
249 | u64 capacity; | |
250 | char name[41]; | |
251 | u16 dev_geom_head; | |
252 | u16 dev_geom_sect; | |
253 | u16 dev_geom_cyl; | |
254 | }; | |
255 | ||
256 | struct carm_request { | |
257 | unsigned int tag; | |
258 | int n_elem; | |
259 | unsigned int msg_type; | |
260 | unsigned int msg_subtype; | |
261 | unsigned int msg_bucket; | |
262 | struct request *rq; | |
263 | struct carm_port *port; | |
264 | struct scatterlist sg[CARM_MAX_REQ_SG]; | |
265 | }; | |
266 | ||
267 | struct carm_host { | |
268 | unsigned long flags; | |
269 | void __iomem *mmio; | |
270 | void *shm; | |
271 | dma_addr_t shm_dma; | |
272 | ||
273 | int major; | |
274 | int id; | |
275 | char name[32]; | |
276 | ||
277 | spinlock_t lock; | |
278 | struct pci_dev *pdev; | |
279 | unsigned int state; | |
280 | u32 fw_ver; | |
281 | ||
165125e1 | 282 | struct request_queue *oob_q; |
1da177e4 LT |
283 | unsigned int n_oob; |
284 | ||
285 | unsigned int hw_sg_used; | |
286 | ||
287 | unsigned int resp_idx; | |
288 | ||
289 | unsigned int wait_q_prod; | |
290 | unsigned int wait_q_cons; | |
165125e1 | 291 | struct request_queue *wait_q[CARM_MAX_WAIT_Q]; |
1da177e4 LT |
292 | |
293 | unsigned int n_msgs; | |
294 | u64 msg_alloc; | |
295 | struct carm_request req[CARM_MAX_REQ]; | |
296 | void *msg_base; | |
297 | dma_addr_t msg_dma; | |
298 | ||
299 | int cur_scan_dev; | |
300 | unsigned long dev_active; | |
301 | unsigned long dev_present; | |
302 | struct carm_port port[CARM_MAX_PORTS]; | |
303 | ||
304 | struct work_struct fsm_task; | |
305 | ||
906c3b75 | 306 | struct completion probe_comp; |
1da177e4 LT |
307 | }; |
308 | ||
309 | struct carm_response { | |
310 | __le32 ret_handle; | |
311 | __le32 status; | |
312 | } __attribute__((packed)); | |
313 | ||
314 | struct carm_msg_sg { | |
315 | __le32 start; | |
316 | __le32 len; | |
317 | } __attribute__((packed)); | |
318 | ||
319 | struct carm_msg_rw { | |
320 | u8 type; | |
321 | u8 id; | |
322 | u8 sg_count; | |
323 | u8 sg_type; | |
324 | __le32 handle; | |
325 | __le32 lba; | |
326 | __le16 lba_count; | |
327 | __le16 lba_high; | |
328 | struct carm_msg_sg sg[32]; | |
329 | } __attribute__((packed)); | |
330 | ||
331 | struct carm_msg_allocbuf { | |
332 | u8 type; | |
333 | u8 subtype; | |
334 | u8 n_sg; | |
335 | u8 sg_type; | |
336 | __le32 handle; | |
337 | __le32 addr; | |
338 | __le32 len; | |
339 | __le32 evt_pool; | |
340 | __le32 n_evt; | |
341 | __le32 rbuf_pool; | |
342 | __le32 n_rbuf; | |
343 | __le32 msg_pool; | |
344 | __le32 n_msg; | |
345 | struct carm_msg_sg sg[8]; | |
346 | } __attribute__((packed)); | |
347 | ||
348 | struct carm_msg_ioctl { | |
349 | u8 type; | |
350 | u8 subtype; | |
351 | u8 array_id; | |
352 | u8 reserved1; | |
353 | __le32 handle; | |
354 | __le32 data_addr; | |
355 | u32 reserved2; | |
356 | } __attribute__((packed)); | |
357 | ||
358 | struct carm_msg_sync_time { | |
359 | u8 type; | |
360 | u8 subtype; | |
361 | u16 reserved1; | |
362 | __le32 handle; | |
363 | u32 reserved2; | |
364 | __le32 timestamp; | |
365 | } __attribute__((packed)); | |
366 | ||
367 | struct carm_msg_get_fw_ver { | |
368 | u8 type; | |
369 | u8 subtype; | |
370 | u16 reserved1; | |
371 | __le32 handle; | |
372 | __le32 data_addr; | |
373 | u32 reserved2; | |
374 | } __attribute__((packed)); | |
375 | ||
376 | struct carm_fw_ver { | |
377 | __le32 version; | |
378 | u8 features; | |
379 | u8 reserved1; | |
380 | u16 reserved2; | |
381 | } __attribute__((packed)); | |
382 | ||
383 | struct carm_array_info { | |
384 | __le32 size; | |
385 | ||
386 | __le16 size_hi; | |
387 | __le16 stripe_size; | |
388 | ||
389 | __le32 mode; | |
390 | ||
391 | __le16 stripe_blk_sz; | |
392 | __le16 reserved1; | |
393 | ||
394 | __le16 cyl; | |
395 | __le16 head; | |
396 | ||
397 | __le16 sect; | |
398 | u8 array_id; | |
399 | u8 reserved2; | |
400 | ||
401 | char name[40]; | |
402 | ||
403 | __le32 array_status; | |
404 | ||
405 | /* device list continues beyond this point? */ | |
406 | } __attribute__((packed)); | |
407 | ||
408 | static int carm_init_one (struct pci_dev *pdev, const struct pci_device_id *ent); | |
409 | static void carm_remove_one (struct pci_dev *pdev); | |
a885c8c4 | 410 | static int carm_bdev_getgeo(struct block_device *bdev, struct hd_geometry *geo); |
1da177e4 LT |
411 | |
412 | static struct pci_device_id carm_pci_tbl[] = { | |
413 | { PCI_VENDOR_ID_PROMISE, 0x8000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, }, | |
414 | { PCI_VENDOR_ID_PROMISE, 0x8002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, }, | |
415 | { } /* terminate list */ | |
416 | }; | |
417 | MODULE_DEVICE_TABLE(pci, carm_pci_tbl); | |
418 | ||
419 | static struct pci_driver carm_driver = { | |
420 | .name = DRV_NAME, | |
421 | .id_table = carm_pci_tbl, | |
422 | .probe = carm_init_one, | |
423 | .remove = carm_remove_one, | |
424 | }; | |
425 | ||
426 | static struct block_device_operations carm_bd_ops = { | |
427 | .owner = THIS_MODULE, | |
a885c8c4 | 428 | .getgeo = carm_bdev_getgeo, |
1da177e4 LT |
429 | }; |
430 | ||
431 | static unsigned int carm_host_id; | |
432 | static unsigned long carm_major_alloc; | |
433 | ||
434 | ||
435 | ||
a885c8c4 | 436 | static int carm_bdev_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 | 437 | { |
a885c8c4 | 438 | struct carm_port *port = bdev->bd_disk->private_data; |
1da177e4 | 439 | |
a885c8c4 CH |
440 | geo->heads = (u8) port->dev_geom_head; |
441 | geo->sectors = (u8) port->dev_geom_sect; | |
442 | geo->cylinders = port->dev_geom_cyl; | |
443 | return 0; | |
1da177e4 LT |
444 | } |
445 | ||
446 | static const u32 msg_sizes[] = { 32, 64, 128, CARM_MSG_SIZE }; | |
447 | ||
448 | static inline int carm_lookup_bucket(u32 msg_size) | |
449 | { | |
450 | int i; | |
451 | ||
452 | for (i = 0; i < ARRAY_SIZE(msg_sizes); i++) | |
453 | if (msg_size <= msg_sizes[i]) | |
454 | return i; | |
2d5a2ae5 | 455 | |
1da177e4 LT |
456 | return -ENOENT; |
457 | } | |
458 | ||
459 | static void carm_init_buckets(void __iomem *mmio) | |
460 | { | |
461 | unsigned int i; | |
462 | ||
463 | for (i = 0; i < ARRAY_SIZE(msg_sizes); i++) | |
464 | writel(msg_sizes[i], mmio + CARM_CMS0 + (4 * i)); | |
465 | } | |
466 | ||
467 | static inline void *carm_ref_msg(struct carm_host *host, | |
468 | unsigned int msg_idx) | |
469 | { | |
470 | return host->msg_base + (msg_idx * CARM_MSG_SIZE); | |
471 | } | |
472 | ||
473 | static inline dma_addr_t carm_ref_msg_dma(struct carm_host *host, | |
474 | unsigned int msg_idx) | |
475 | { | |
476 | return host->msg_dma + (msg_idx * CARM_MSG_SIZE); | |
477 | } | |
478 | ||
479 | static int carm_send_msg(struct carm_host *host, | |
480 | struct carm_request *crq) | |
481 | { | |
482 | void __iomem *mmio = host->mmio; | |
483 | u32 msg = (u32) carm_ref_msg_dma(host, crq->tag); | |
484 | u32 cm_bucket = crq->msg_bucket; | |
485 | u32 tmp; | |
486 | int rc = 0; | |
487 | ||
488 | VPRINTK("ENTER\n"); | |
489 | ||
490 | tmp = readl(mmio + CARM_HMUC); | |
491 | if (tmp & CARM_Q_FULL) { | |
492 | #if 0 | |
493 | tmp = readl(mmio + CARM_INT_MASK); | |
494 | tmp |= INT_Q_AVAILABLE; | |
495 | writel(tmp, mmio + CARM_INT_MASK); | |
496 | readl(mmio + CARM_INT_MASK); /* flush */ | |
497 | #endif | |
498 | DPRINTK("host msg queue full\n"); | |
499 | rc = -EBUSY; | |
500 | } else { | |
501 | writel(msg | (cm_bucket << 1), mmio + CARM_IHQP); | |
502 | readl(mmio + CARM_IHQP); /* flush */ | |
503 | } | |
504 | ||
505 | return rc; | |
506 | } | |
507 | ||
508 | static struct carm_request *carm_get_request(struct carm_host *host) | |
509 | { | |
510 | unsigned int i; | |
511 | ||
512 | /* obey global hardware limit on S/G entries */ | |
513 | if (host->hw_sg_used >= (CARM_MAX_HOST_SG - CARM_MAX_REQ_SG)) | |
514 | return NULL; | |
515 | ||
2d5a2ae5 | 516 | for (i = 0; i < max_queue; i++) |
1da177e4 LT |
517 | if ((host->msg_alloc & (1ULL << i)) == 0) { |
518 | struct carm_request *crq = &host->req[i]; | |
519 | crq->port = NULL; | |
520 | crq->n_elem = 0; | |
521 | ||
522 | host->msg_alloc |= (1ULL << i); | |
523 | host->n_msgs++; | |
524 | ||
525 | assert(host->n_msgs <= CARM_MAX_REQ); | |
45711f1a | 526 | sg_init_table(crq->sg, CARM_MAX_REQ_SG); |
1da177e4 LT |
527 | return crq; |
528 | } | |
2d5a2ae5 | 529 | |
1da177e4 LT |
530 | DPRINTK("no request available, returning NULL\n"); |
531 | return NULL; | |
532 | } | |
533 | ||
534 | static int carm_put_request(struct carm_host *host, struct carm_request *crq) | |
535 | { | |
2d5a2ae5 | 536 | assert(crq->tag < max_queue); |
1da177e4 LT |
537 | |
538 | if (unlikely((host->msg_alloc & (1ULL << crq->tag)) == 0)) | |
539 | return -EINVAL; /* tried to clear a tag that was not active */ | |
540 | ||
541 | assert(host->hw_sg_used >= crq->n_elem); | |
542 | ||
543 | host->msg_alloc &= ~(1ULL << crq->tag); | |
544 | host->hw_sg_used -= crq->n_elem; | |
545 | host->n_msgs--; | |
546 | ||
547 | return 0; | |
548 | } | |
549 | ||
550 | static struct carm_request *carm_get_special(struct carm_host *host) | |
551 | { | |
552 | unsigned long flags; | |
553 | struct carm_request *crq = NULL; | |
554 | struct request *rq; | |
555 | int tries = 5000; | |
556 | ||
557 | while (tries-- > 0) { | |
558 | spin_lock_irqsave(&host->lock, flags); | |
559 | crq = carm_get_request(host); | |
560 | spin_unlock_irqrestore(&host->lock, flags); | |
561 | ||
562 | if (crq) | |
563 | break; | |
564 | msleep(10); | |
565 | } | |
566 | ||
567 | if (!crq) | |
568 | return NULL; | |
569 | ||
570 | rq = blk_get_request(host->oob_q, WRITE /* bogus */, GFP_KERNEL); | |
571 | if (!rq) { | |
572 | spin_lock_irqsave(&host->lock, flags); | |
573 | carm_put_request(host, crq); | |
574 | spin_unlock_irqrestore(&host->lock, flags); | |
575 | return NULL; | |
576 | } | |
577 | ||
578 | crq->rq = rq; | |
579 | return crq; | |
580 | } | |
581 | ||
582 | static int carm_array_info (struct carm_host *host, unsigned int array_idx) | |
583 | { | |
584 | struct carm_msg_ioctl *ioc; | |
585 | unsigned int idx; | |
586 | u32 msg_data; | |
587 | dma_addr_t msg_dma; | |
588 | struct carm_request *crq; | |
589 | int rc; | |
590 | ||
591 | crq = carm_get_special(host); | |
592 | if (!crq) { | |
593 | rc = -ENOMEM; | |
594 | goto err_out; | |
595 | } | |
596 | ||
597 | idx = crq->tag; | |
598 | ||
599 | ioc = carm_ref_msg(host, idx); | |
600 | msg_dma = carm_ref_msg_dma(host, idx); | |
601 | msg_data = (u32) (msg_dma + sizeof(struct carm_array_info)); | |
602 | ||
603 | crq->msg_type = CARM_MSG_ARRAY; | |
604 | crq->msg_subtype = CARM_ARRAY_INFO; | |
605 | rc = carm_lookup_bucket(sizeof(struct carm_msg_ioctl) + | |
606 | sizeof(struct carm_array_info)); | |
607 | BUG_ON(rc < 0); | |
608 | crq->msg_bucket = (u32) rc; | |
609 | ||
610 | memset(ioc, 0, sizeof(*ioc)); | |
611 | ioc->type = CARM_MSG_ARRAY; | |
612 | ioc->subtype = CARM_ARRAY_INFO; | |
613 | ioc->array_id = (u8) array_idx; | |
614 | ioc->handle = cpu_to_le32(TAG_ENCODE(idx)); | |
615 | ioc->data_addr = cpu_to_le32(msg_data); | |
616 | ||
617 | spin_lock_irq(&host->lock); | |
618 | assert(host->state == HST_DEV_SCAN_START || | |
619 | host->state == HST_DEV_SCAN); | |
620 | spin_unlock_irq(&host->lock); | |
621 | ||
622 | DPRINTK("blk_insert_request, tag == %u\n", idx); | |
867d1191 | 623 | blk_insert_request(host->oob_q, crq->rq, 1, crq); |
1da177e4 LT |
624 | |
625 | return 0; | |
626 | ||
627 | err_out: | |
628 | spin_lock_irq(&host->lock); | |
629 | host->state = HST_ERROR; | |
630 | spin_unlock_irq(&host->lock); | |
631 | return rc; | |
632 | } | |
633 | ||
634 | typedef unsigned int (*carm_sspc_t)(struct carm_host *, unsigned int, void *); | |
635 | ||
636 | static int carm_send_special (struct carm_host *host, carm_sspc_t func) | |
637 | { | |
638 | struct carm_request *crq; | |
639 | struct carm_msg_ioctl *ioc; | |
640 | void *mem; | |
641 | unsigned int idx, msg_size; | |
642 | int rc; | |
643 | ||
644 | crq = carm_get_special(host); | |
645 | if (!crq) | |
646 | return -ENOMEM; | |
647 | ||
648 | idx = crq->tag; | |
649 | ||
650 | mem = carm_ref_msg(host, idx); | |
651 | ||
652 | msg_size = func(host, idx, mem); | |
653 | ||
654 | ioc = mem; | |
655 | crq->msg_type = ioc->type; | |
656 | crq->msg_subtype = ioc->subtype; | |
657 | rc = carm_lookup_bucket(msg_size); | |
658 | BUG_ON(rc < 0); | |
659 | crq->msg_bucket = (u32) rc; | |
660 | ||
661 | DPRINTK("blk_insert_request, tag == %u\n", idx); | |
867d1191 | 662 | blk_insert_request(host->oob_q, crq->rq, 1, crq); |
1da177e4 LT |
663 | |
664 | return 0; | |
665 | } | |
666 | ||
667 | static unsigned int carm_fill_sync_time(struct carm_host *host, | |
668 | unsigned int idx, void *mem) | |
669 | { | |
670 | struct timeval tv; | |
671 | struct carm_msg_sync_time *st = mem; | |
672 | ||
673 | do_gettimeofday(&tv); | |
674 | ||
675 | memset(st, 0, sizeof(*st)); | |
676 | st->type = CARM_MSG_MISC; | |
677 | st->subtype = MISC_SET_TIME; | |
678 | st->handle = cpu_to_le32(TAG_ENCODE(idx)); | |
679 | st->timestamp = cpu_to_le32(tv.tv_sec); | |
680 | ||
681 | return sizeof(struct carm_msg_sync_time); | |
682 | } | |
683 | ||
684 | static unsigned int carm_fill_alloc_buf(struct carm_host *host, | |
685 | unsigned int idx, void *mem) | |
686 | { | |
687 | struct carm_msg_allocbuf *ab = mem; | |
688 | ||
689 | memset(ab, 0, sizeof(*ab)); | |
690 | ab->type = CARM_MSG_MISC; | |
691 | ab->subtype = MISC_ALLOC_MEM; | |
692 | ab->handle = cpu_to_le32(TAG_ENCODE(idx)); | |
693 | ab->n_sg = 1; | |
694 | ab->sg_type = SGT_32BIT; | |
695 | ab->addr = cpu_to_le32(host->shm_dma + (PDC_SHM_SIZE >> 1)); | |
696 | ab->len = cpu_to_le32(PDC_SHM_SIZE >> 1); | |
697 | ab->evt_pool = cpu_to_le32(host->shm_dma + (16 * 1024)); | |
698 | ab->n_evt = cpu_to_le32(1024); | |
699 | ab->rbuf_pool = cpu_to_le32(host->shm_dma); | |
700 | ab->n_rbuf = cpu_to_le32(RMSG_Q_LEN); | |
701 | ab->msg_pool = cpu_to_le32(host->shm_dma + RBUF_LEN); | |
702 | ab->n_msg = cpu_to_le32(CARM_Q_LEN); | |
703 | ab->sg[0].start = cpu_to_le32(host->shm_dma + (PDC_SHM_SIZE >> 1)); | |
704 | ab->sg[0].len = cpu_to_le32(65536); | |
705 | ||
706 | return sizeof(struct carm_msg_allocbuf); | |
707 | } | |
708 | ||
709 | static unsigned int carm_fill_scan_channels(struct carm_host *host, | |
710 | unsigned int idx, void *mem) | |
711 | { | |
712 | struct carm_msg_ioctl *ioc = mem; | |
713 | u32 msg_data = (u32) (carm_ref_msg_dma(host, idx) + | |
714 | IOC_SCAN_CHAN_OFFSET); | |
715 | ||
716 | memset(ioc, 0, sizeof(*ioc)); | |
717 | ioc->type = CARM_MSG_IOCTL; | |
718 | ioc->subtype = CARM_IOC_SCAN_CHAN; | |
719 | ioc->handle = cpu_to_le32(TAG_ENCODE(idx)); | |
720 | ioc->data_addr = cpu_to_le32(msg_data); | |
721 | ||
722 | /* fill output data area with "no device" default values */ | |
723 | mem += IOC_SCAN_CHAN_OFFSET; | |
724 | memset(mem, IOC_SCAN_CHAN_NODEV, CARM_MAX_PORTS); | |
725 | ||
726 | return IOC_SCAN_CHAN_OFFSET + CARM_MAX_PORTS; | |
727 | } | |
728 | ||
729 | static unsigned int carm_fill_get_fw_ver(struct carm_host *host, | |
730 | unsigned int idx, void *mem) | |
731 | { | |
732 | struct carm_msg_get_fw_ver *ioc = mem; | |
733 | u32 msg_data = (u32) (carm_ref_msg_dma(host, idx) + sizeof(*ioc)); | |
734 | ||
735 | memset(ioc, 0, sizeof(*ioc)); | |
736 | ioc->type = CARM_MSG_MISC; | |
737 | ioc->subtype = MISC_GET_FW_VER; | |
738 | ioc->handle = cpu_to_le32(TAG_ENCODE(idx)); | |
739 | ioc->data_addr = cpu_to_le32(msg_data); | |
740 | ||
741 | return sizeof(struct carm_msg_get_fw_ver) + | |
742 | sizeof(struct carm_fw_ver); | |
743 | } | |
744 | ||
745 | static inline void carm_end_request_queued(struct carm_host *host, | |
746 | struct carm_request *crq, | |
a9c73d05 | 747 | int error) |
1da177e4 LT |
748 | { |
749 | struct request *req = crq->rq; | |
750 | int rc; | |
751 | ||
40cbbb78 | 752 | __blk_end_request_all(req, error); |
1da177e4 | 753 | |
1da177e4 LT |
754 | rc = carm_put_request(host, crq); |
755 | assert(rc == 0); | |
756 | } | |
757 | ||
165125e1 | 758 | static inline void carm_push_q (struct carm_host *host, struct request_queue *q) |
1da177e4 LT |
759 | { |
760 | unsigned int idx = host->wait_q_prod % CARM_MAX_WAIT_Q; | |
761 | ||
762 | blk_stop_queue(q); | |
763 | VPRINTK("STOPPED QUEUE %p\n", q); | |
764 | ||
765 | host->wait_q[idx] = q; | |
766 | host->wait_q_prod++; | |
767 | BUG_ON(host->wait_q_prod == host->wait_q_cons); /* overrun */ | |
768 | } | |
769 | ||
165125e1 | 770 | static inline struct request_queue *carm_pop_q(struct carm_host *host) |
1da177e4 LT |
771 | { |
772 | unsigned int idx; | |
773 | ||
774 | if (host->wait_q_prod == host->wait_q_cons) | |
775 | return NULL; | |
776 | ||
777 | idx = host->wait_q_cons % CARM_MAX_WAIT_Q; | |
778 | host->wait_q_cons++; | |
779 | ||
780 | return host->wait_q[idx]; | |
781 | } | |
782 | ||
783 | static inline void carm_round_robin(struct carm_host *host) | |
784 | { | |
165125e1 | 785 | struct request_queue *q = carm_pop_q(host); |
1da177e4 LT |
786 | if (q) { |
787 | blk_start_queue(q); | |
788 | VPRINTK("STARTED QUEUE %p\n", q); | |
789 | } | |
790 | } | |
791 | ||
792 | static inline void carm_end_rq(struct carm_host *host, struct carm_request *crq, | |
a9c73d05 | 793 | int error) |
1da177e4 | 794 | { |
a9c73d05 | 795 | carm_end_request_queued(host, crq, error); |
2d5a2ae5 | 796 | if (max_queue == 1) |
1da177e4 LT |
797 | carm_round_robin(host); |
798 | else if ((host->n_msgs <= CARM_MSG_LOW_WATER) && | |
799 | (host->hw_sg_used <= CARM_SG_LOW_WATER)) { | |
800 | carm_round_robin(host); | |
801 | } | |
802 | } | |
803 | ||
165125e1 | 804 | static void carm_oob_rq_fn(struct request_queue *q) |
1da177e4 LT |
805 | { |
806 | struct carm_host *host = q->queuedata; | |
807 | struct carm_request *crq; | |
808 | struct request *rq; | |
809 | int rc; | |
810 | ||
811 | while (1) { | |
812 | DPRINTK("get req\n"); | |
9934c8c0 | 813 | rq = blk_fetch_request(q); |
1da177e4 LT |
814 | if (!rq) |
815 | break; | |
816 | ||
1da177e4 LT |
817 | crq = rq->special; |
818 | assert(crq != NULL); | |
819 | assert(crq->rq == rq); | |
820 | ||
821 | crq->n_elem = 0; | |
822 | ||
823 | DPRINTK("send req\n"); | |
824 | rc = carm_send_msg(host, crq); | |
825 | if (rc) { | |
826 | blk_requeue_request(q, rq); | |
827 | carm_push_q(host, q); | |
828 | return; /* call us again later, eventually */ | |
829 | } | |
830 | } | |
831 | } | |
832 | ||
165125e1 | 833 | static void carm_rq_fn(struct request_queue *q) |
1da177e4 LT |
834 | { |
835 | struct carm_port *port = q->queuedata; | |
836 | struct carm_host *host = port->host; | |
837 | struct carm_msg_rw *msg; | |
838 | struct carm_request *crq; | |
839 | struct request *rq; | |
840 | struct scatterlist *sg; | |
841 | int writing = 0, pci_dir, i, n_elem, rc; | |
842 | u32 tmp; | |
843 | unsigned int msg_size; | |
844 | ||
845 | queue_one_request: | |
846 | VPRINTK("get req\n"); | |
9934c8c0 | 847 | rq = blk_peek_request(q); |
1da177e4 LT |
848 | if (!rq) |
849 | return; | |
850 | ||
851 | crq = carm_get_request(host); | |
852 | if (!crq) { | |
853 | carm_push_q(host, q); | |
854 | return; /* call us again later, eventually */ | |
855 | } | |
856 | crq->rq = rq; | |
857 | ||
9934c8c0 | 858 | blk_start_request(rq); |
1da177e4 LT |
859 | |
860 | if (rq_data_dir(rq) == WRITE) { | |
861 | writing = 1; | |
862 | pci_dir = PCI_DMA_TODEVICE; | |
863 | } else { | |
864 | pci_dir = PCI_DMA_FROMDEVICE; | |
865 | } | |
866 | ||
867 | /* get scatterlist from block layer */ | |
868 | sg = &crq->sg[0]; | |
869 | n_elem = blk_rq_map_sg(q, rq, sg); | |
870 | if (n_elem <= 0) { | |
a9c73d05 | 871 | carm_end_rq(host, crq, -EIO); |
1da177e4 LT |
872 | return; /* request with no s/g entries? */ |
873 | } | |
874 | ||
875 | /* map scatterlist to PCI bus addresses */ | |
876 | n_elem = pci_map_sg(host->pdev, sg, n_elem, pci_dir); | |
877 | if (n_elem <= 0) { | |
a9c73d05 | 878 | carm_end_rq(host, crq, -EIO); |
1da177e4 LT |
879 | return; /* request with no s/g entries? */ |
880 | } | |
881 | crq->n_elem = n_elem; | |
882 | crq->port = port; | |
883 | host->hw_sg_used += n_elem; | |
884 | ||
885 | /* | |
886 | * build read/write message | |
887 | */ | |
888 | ||
889 | VPRINTK("build msg\n"); | |
890 | msg = (struct carm_msg_rw *) carm_ref_msg(host, crq->tag); | |
891 | ||
892 | if (writing) { | |
893 | msg->type = CARM_MSG_WRITE; | |
894 | crq->msg_type = CARM_MSG_WRITE; | |
895 | } else { | |
896 | msg->type = CARM_MSG_READ; | |
897 | crq->msg_type = CARM_MSG_READ; | |
898 | } | |
899 | ||
900 | msg->id = port->port_no; | |
901 | msg->sg_count = n_elem; | |
902 | msg->sg_type = SGT_32BIT; | |
903 | msg->handle = cpu_to_le32(TAG_ENCODE(crq->tag)); | |
83096ebf TH |
904 | msg->lba = cpu_to_le32(blk_rq_pos(rq) & 0xffffffff); |
905 | tmp = (blk_rq_pos(rq) >> 16) >> 16; | |
1da177e4 | 906 | msg->lba_high = cpu_to_le16( (u16) tmp ); |
83096ebf | 907 | msg->lba_count = cpu_to_le16(blk_rq_sectors(rq)); |
1da177e4 LT |
908 | |
909 | msg_size = sizeof(struct carm_msg_rw) - sizeof(msg->sg); | |
910 | for (i = 0; i < n_elem; i++) { | |
911 | struct carm_msg_sg *carm_sg = &msg->sg[i]; | |
912 | carm_sg->start = cpu_to_le32(sg_dma_address(&crq->sg[i])); | |
913 | carm_sg->len = cpu_to_le32(sg_dma_len(&crq->sg[i])); | |
914 | msg_size += sizeof(struct carm_msg_sg); | |
915 | } | |
916 | ||
917 | rc = carm_lookup_bucket(msg_size); | |
918 | BUG_ON(rc < 0); | |
919 | crq->msg_bucket = (u32) rc; | |
920 | ||
921 | /* | |
922 | * queue read/write message to hardware | |
923 | */ | |
924 | ||
925 | VPRINTK("send msg, tag == %u\n", crq->tag); | |
926 | rc = carm_send_msg(host, crq); | |
927 | if (rc) { | |
928 | carm_put_request(host, crq); | |
929 | blk_requeue_request(q, rq); | |
930 | carm_push_q(host, q); | |
931 | return; /* call us again later, eventually */ | |
932 | } | |
933 | ||
934 | goto queue_one_request; | |
935 | } | |
936 | ||
937 | static void carm_handle_array_info(struct carm_host *host, | |
938 | struct carm_request *crq, u8 *mem, | |
a9c73d05 | 939 | int error) |
1da177e4 LT |
940 | { |
941 | struct carm_port *port; | |
942 | u8 *msg_data = mem + sizeof(struct carm_array_info); | |
943 | struct carm_array_info *desc = (struct carm_array_info *) msg_data; | |
944 | u64 lo, hi; | |
945 | int cur_port; | |
946 | size_t slen; | |
947 | ||
948 | DPRINTK("ENTER\n"); | |
949 | ||
a9c73d05 | 950 | carm_end_rq(host, crq, error); |
1da177e4 | 951 | |
a9c73d05 | 952 | if (error) |
1da177e4 LT |
953 | goto out; |
954 | if (le32_to_cpu(desc->array_status) & ARRAY_NO_EXIST) | |
955 | goto out; | |
956 | ||
957 | cur_port = host->cur_scan_dev; | |
958 | ||
959 | /* should never occur */ | |
960 | if ((cur_port < 0) || (cur_port >= CARM_MAX_PORTS)) { | |
961 | printk(KERN_ERR PFX "BUG: cur_scan_dev==%d, array_id==%d\n", | |
962 | cur_port, (int) desc->array_id); | |
963 | goto out; | |
964 | } | |
965 | ||
966 | port = &host->port[cur_port]; | |
967 | ||
968 | lo = (u64) le32_to_cpu(desc->size); | |
969 | hi = (u64) le16_to_cpu(desc->size_hi); | |
970 | ||
971 | port->capacity = lo | (hi << 32); | |
972 | port->dev_geom_head = le16_to_cpu(desc->head); | |
973 | port->dev_geom_sect = le16_to_cpu(desc->sect); | |
974 | port->dev_geom_cyl = le16_to_cpu(desc->cyl); | |
975 | ||
976 | host->dev_active |= (1 << cur_port); | |
977 | ||
978 | strncpy(port->name, desc->name, sizeof(port->name)); | |
979 | port->name[sizeof(port->name) - 1] = 0; | |
980 | slen = strlen(port->name); | |
981 | while (slen && (port->name[slen - 1] == ' ')) { | |
982 | port->name[slen - 1] = 0; | |
983 | slen--; | |
984 | } | |
985 | ||
986 | printk(KERN_INFO DRV_NAME "(%s): port %u device %Lu sectors\n", | |
987 | pci_name(host->pdev), port->port_no, | |
988 | (unsigned long long) port->capacity); | |
989 | printk(KERN_INFO DRV_NAME "(%s): port %u device \"%s\"\n", | |
990 | pci_name(host->pdev), port->port_no, port->name); | |
991 | ||
992 | out: | |
993 | assert(host->state == HST_DEV_SCAN); | |
994 | schedule_work(&host->fsm_task); | |
995 | } | |
996 | ||
997 | static void carm_handle_scan_chan(struct carm_host *host, | |
998 | struct carm_request *crq, u8 *mem, | |
a9c73d05 | 999 | int error) |
1da177e4 LT |
1000 | { |
1001 | u8 *msg_data = mem + IOC_SCAN_CHAN_OFFSET; | |
1002 | unsigned int i, dev_count = 0; | |
1003 | int new_state = HST_DEV_SCAN_START; | |
1004 | ||
1005 | DPRINTK("ENTER\n"); | |
1006 | ||
a9c73d05 | 1007 | carm_end_rq(host, crq, error); |
1da177e4 | 1008 | |
a9c73d05 | 1009 | if (error) { |
1da177e4 LT |
1010 | new_state = HST_ERROR; |
1011 | goto out; | |
1012 | } | |
1013 | ||
1014 | /* TODO: scan and support non-disk devices */ | |
1015 | for (i = 0; i < 8; i++) | |
1016 | if (msg_data[i] == 0) { /* direct-access device (disk) */ | |
1017 | host->dev_present |= (1 << i); | |
1018 | dev_count++; | |
1019 | } | |
1020 | ||
1021 | printk(KERN_INFO DRV_NAME "(%s): found %u interesting devices\n", | |
1022 | pci_name(host->pdev), dev_count); | |
1023 | ||
1024 | out: | |
1025 | assert(host->state == HST_PORT_SCAN); | |
1026 | host->state = new_state; | |
1027 | schedule_work(&host->fsm_task); | |
1028 | } | |
1029 | ||
1030 | static void carm_handle_generic(struct carm_host *host, | |
a9c73d05 | 1031 | struct carm_request *crq, int error, |
1da177e4 LT |
1032 | int cur_state, int next_state) |
1033 | { | |
1034 | DPRINTK("ENTER\n"); | |
1035 | ||
a9c73d05 | 1036 | carm_end_rq(host, crq, error); |
1da177e4 LT |
1037 | |
1038 | assert(host->state == cur_state); | |
a9c73d05 | 1039 | if (error) |
1da177e4 | 1040 | host->state = HST_ERROR; |
a9c73d05 KU |
1041 | else |
1042 | host->state = next_state; | |
1da177e4 LT |
1043 | schedule_work(&host->fsm_task); |
1044 | } | |
1045 | ||
1046 | static inline void carm_handle_rw(struct carm_host *host, | |
a9c73d05 | 1047 | struct carm_request *crq, int error) |
1da177e4 LT |
1048 | { |
1049 | int pci_dir; | |
1050 | ||
1051 | VPRINTK("ENTER\n"); | |
1052 | ||
1053 | if (rq_data_dir(crq->rq) == WRITE) | |
1054 | pci_dir = PCI_DMA_TODEVICE; | |
1055 | else | |
1056 | pci_dir = PCI_DMA_FROMDEVICE; | |
1057 | ||
1058 | pci_unmap_sg(host->pdev, &crq->sg[0], crq->n_elem, pci_dir); | |
1059 | ||
a9c73d05 | 1060 | carm_end_rq(host, crq, error); |
1da177e4 LT |
1061 | } |
1062 | ||
1063 | static inline void carm_handle_resp(struct carm_host *host, | |
1064 | __le32 ret_handle_le, u32 status) | |
1065 | { | |
1066 | u32 handle = le32_to_cpu(ret_handle_le); | |
1067 | unsigned int msg_idx; | |
1068 | struct carm_request *crq; | |
a9c73d05 | 1069 | int error = (status == RMSG_OK) ? 0 : -EIO; |
1da177e4 LT |
1070 | u8 *mem; |
1071 | ||
1072 | VPRINTK("ENTER, handle == 0x%x\n", handle); | |
1073 | ||
1074 | if (unlikely(!TAG_VALID(handle))) { | |
1075 | printk(KERN_ERR DRV_NAME "(%s): BUG: invalid tag 0x%x\n", | |
1076 | pci_name(host->pdev), handle); | |
1077 | return; | |
1078 | } | |
1079 | ||
1080 | msg_idx = TAG_DECODE(handle); | |
1081 | VPRINTK("tag == %u\n", msg_idx); | |
1082 | ||
1083 | crq = &host->req[msg_idx]; | |
1084 | ||
1085 | /* fast path */ | |
1086 | if (likely(crq->msg_type == CARM_MSG_READ || | |
1087 | crq->msg_type == CARM_MSG_WRITE)) { | |
a9c73d05 | 1088 | carm_handle_rw(host, crq, error); |
1da177e4 LT |
1089 | return; |
1090 | } | |
1091 | ||
1092 | mem = carm_ref_msg(host, msg_idx); | |
1093 | ||
1094 | switch (crq->msg_type) { | |
1095 | case CARM_MSG_IOCTL: { | |
1096 | switch (crq->msg_subtype) { | |
1097 | case CARM_IOC_SCAN_CHAN: | |
a9c73d05 | 1098 | carm_handle_scan_chan(host, crq, mem, error); |
1da177e4 LT |
1099 | break; |
1100 | default: | |
1101 | /* unknown / invalid response */ | |
1102 | goto err_out; | |
1103 | } | |
1104 | break; | |
1105 | } | |
1106 | ||
1107 | case CARM_MSG_MISC: { | |
1108 | switch (crq->msg_subtype) { | |
1109 | case MISC_ALLOC_MEM: | |
a9c73d05 | 1110 | carm_handle_generic(host, crq, error, |
1da177e4 LT |
1111 | HST_ALLOC_BUF, HST_SYNC_TIME); |
1112 | break; | |
1113 | case MISC_SET_TIME: | |
a9c73d05 | 1114 | carm_handle_generic(host, crq, error, |
1da177e4 LT |
1115 | HST_SYNC_TIME, HST_GET_FW_VER); |
1116 | break; | |
1117 | case MISC_GET_FW_VER: { | |
1118 | struct carm_fw_ver *ver = (struct carm_fw_ver *) | |
1119 | mem + sizeof(struct carm_msg_get_fw_ver); | |
a9c73d05 | 1120 | if (!error) { |
1da177e4 LT |
1121 | host->fw_ver = le32_to_cpu(ver->version); |
1122 | host->flags |= (ver->features & FL_FW_VER_MASK); | |
1123 | } | |
a9c73d05 | 1124 | carm_handle_generic(host, crq, error, |
1da177e4 LT |
1125 | HST_GET_FW_VER, HST_PORT_SCAN); |
1126 | break; | |
1127 | } | |
1128 | default: | |
1129 | /* unknown / invalid response */ | |
1130 | goto err_out; | |
1131 | } | |
1132 | break; | |
1133 | } | |
1134 | ||
1135 | case CARM_MSG_ARRAY: { | |
1136 | switch (crq->msg_subtype) { | |
1137 | case CARM_ARRAY_INFO: | |
a9c73d05 | 1138 | carm_handle_array_info(host, crq, mem, error); |
1da177e4 LT |
1139 | break; |
1140 | default: | |
1141 | /* unknown / invalid response */ | |
1142 | goto err_out; | |
1143 | } | |
1144 | break; | |
1145 | } | |
1146 | ||
1147 | default: | |
1148 | /* unknown / invalid response */ | |
1149 | goto err_out; | |
1150 | } | |
1151 | ||
1152 | return; | |
1153 | ||
1154 | err_out: | |
1155 | printk(KERN_WARNING DRV_NAME "(%s): BUG: unhandled message type %d/%d\n", | |
1156 | pci_name(host->pdev), crq->msg_type, crq->msg_subtype); | |
a9c73d05 | 1157 | carm_end_rq(host, crq, -EIO); |
1da177e4 LT |
1158 | } |
1159 | ||
1160 | static inline void carm_handle_responses(struct carm_host *host) | |
1161 | { | |
1162 | void __iomem *mmio = host->mmio; | |
1163 | struct carm_response *resp = (struct carm_response *) host->shm; | |
1164 | unsigned int work = 0; | |
1165 | unsigned int idx = host->resp_idx % RMSG_Q_LEN; | |
1166 | ||
1167 | while (1) { | |
1168 | u32 status = le32_to_cpu(resp[idx].status); | |
1169 | ||
1170 | if (status == 0xffffffff) { | |
1171 | VPRINTK("ending response on index %u\n", idx); | |
1172 | writel(idx << 3, mmio + CARM_RESP_IDX); | |
1173 | break; | |
1174 | } | |
1175 | ||
1176 | /* response to a message we sent */ | |
1177 | else if ((status & (1 << 31)) == 0) { | |
1178 | VPRINTK("handling msg response on index %u\n", idx); | |
1179 | carm_handle_resp(host, resp[idx].ret_handle, status); | |
1180 | resp[idx].status = cpu_to_le32(0xffffffff); | |
1181 | } | |
1182 | ||
1183 | /* asynchronous events the hardware throws our way */ | |
1184 | else if ((status & 0xff000000) == (1 << 31)) { | |
1185 | u8 *evt_type_ptr = (u8 *) &resp[idx]; | |
1186 | u8 evt_type = *evt_type_ptr; | |
1187 | printk(KERN_WARNING DRV_NAME "(%s): unhandled event type %d\n", | |
1188 | pci_name(host->pdev), (int) evt_type); | |
1189 | resp[idx].status = cpu_to_le32(0xffffffff); | |
1190 | } | |
1191 | ||
1192 | idx = NEXT_RESP(idx); | |
1193 | work++; | |
1194 | } | |
1195 | ||
1196 | VPRINTK("EXIT, work==%u\n", work); | |
1197 | host->resp_idx += work; | |
1198 | } | |
1199 | ||
7d12e780 | 1200 | static irqreturn_t carm_interrupt(int irq, void *__host) |
1da177e4 LT |
1201 | { |
1202 | struct carm_host *host = __host; | |
1203 | void __iomem *mmio; | |
1204 | u32 mask; | |
1205 | int handled = 0; | |
1206 | unsigned long flags; | |
1207 | ||
1208 | if (!host) { | |
1209 | VPRINTK("no host\n"); | |
1210 | return IRQ_NONE; | |
1211 | } | |
1212 | ||
1213 | spin_lock_irqsave(&host->lock, flags); | |
1214 | ||
1215 | mmio = host->mmio; | |
1216 | ||
1217 | /* reading should also clear interrupts */ | |
1218 | mask = readl(mmio + CARM_INT_STAT); | |
1219 | ||
1220 | if (mask == 0 || mask == 0xffffffff) { | |
1221 | VPRINTK("no work, mask == 0x%x\n", mask); | |
1222 | goto out; | |
1223 | } | |
1224 | ||
1225 | if (mask & INT_ACK_MASK) | |
1226 | writel(mask, mmio + CARM_INT_STAT); | |
1227 | ||
1228 | if (unlikely(host->state == HST_INVALID)) { | |
1229 | VPRINTK("not initialized yet, mask = 0x%x\n", mask); | |
1230 | goto out; | |
1231 | } | |
1232 | ||
1233 | if (mask & CARM_HAVE_RESP) { | |
1234 | handled = 1; | |
1235 | carm_handle_responses(host); | |
1236 | } | |
1237 | ||
1238 | out: | |
1239 | spin_unlock_irqrestore(&host->lock, flags); | |
1240 | VPRINTK("EXIT\n"); | |
1241 | return IRQ_RETVAL(handled); | |
1242 | } | |
1243 | ||
c4028958 | 1244 | static void carm_fsm_task (struct work_struct *work) |
1da177e4 | 1245 | { |
c4028958 DH |
1246 | struct carm_host *host = |
1247 | container_of(work, struct carm_host, fsm_task); | |
1da177e4 LT |
1248 | unsigned long flags; |
1249 | unsigned int state; | |
1250 | int rc, i, next_dev; | |
1251 | int reschedule = 0; | |
1252 | int new_state = HST_INVALID; | |
1253 | ||
1254 | spin_lock_irqsave(&host->lock, flags); | |
1255 | state = host->state; | |
1256 | spin_unlock_irqrestore(&host->lock, flags); | |
1257 | ||
1258 | DPRINTK("ENTER, state == %s\n", state_name[state]); | |
1259 | ||
1260 | switch (state) { | |
1261 | case HST_PROBE_START: | |
1262 | new_state = HST_ALLOC_BUF; | |
1263 | reschedule = 1; | |
1264 | break; | |
1265 | ||
1266 | case HST_ALLOC_BUF: | |
1267 | rc = carm_send_special(host, carm_fill_alloc_buf); | |
1268 | if (rc) { | |
1269 | new_state = HST_ERROR; | |
1270 | reschedule = 1; | |
1271 | } | |
1272 | break; | |
1273 | ||
1274 | case HST_SYNC_TIME: | |
1275 | rc = carm_send_special(host, carm_fill_sync_time); | |
1276 | if (rc) { | |
1277 | new_state = HST_ERROR; | |
1278 | reschedule = 1; | |
1279 | } | |
1280 | break; | |
1281 | ||
1282 | case HST_GET_FW_VER: | |
1283 | rc = carm_send_special(host, carm_fill_get_fw_ver); | |
1284 | if (rc) { | |
1285 | new_state = HST_ERROR; | |
1286 | reschedule = 1; | |
1287 | } | |
1288 | break; | |
1289 | ||
1290 | case HST_PORT_SCAN: | |
1291 | rc = carm_send_special(host, carm_fill_scan_channels); | |
1292 | if (rc) { | |
1293 | new_state = HST_ERROR; | |
1294 | reschedule = 1; | |
1295 | } | |
1296 | break; | |
1297 | ||
1298 | case HST_DEV_SCAN_START: | |
1299 | host->cur_scan_dev = -1; | |
1300 | new_state = HST_DEV_SCAN; | |
1301 | reschedule = 1; | |
1302 | break; | |
1303 | ||
1304 | case HST_DEV_SCAN: | |
1305 | next_dev = -1; | |
1306 | for (i = host->cur_scan_dev + 1; i < CARM_MAX_PORTS; i++) | |
1307 | if (host->dev_present & (1 << i)) { | |
1308 | next_dev = i; | |
1309 | break; | |
1310 | } | |
1311 | ||
1312 | if (next_dev >= 0) { | |
1313 | host->cur_scan_dev = next_dev; | |
1314 | rc = carm_array_info(host, next_dev); | |
1315 | if (rc) { | |
1316 | new_state = HST_ERROR; | |
1317 | reschedule = 1; | |
1318 | } | |
1319 | } else { | |
1320 | new_state = HST_DEV_ACTIVATE; | |
1321 | reschedule = 1; | |
1322 | } | |
1323 | break; | |
1324 | ||
1325 | case HST_DEV_ACTIVATE: { | |
1326 | int activated = 0; | |
1327 | for (i = 0; i < CARM_MAX_PORTS; i++) | |
1328 | if (host->dev_active & (1 << i)) { | |
1329 | struct carm_port *port = &host->port[i]; | |
1330 | struct gendisk *disk = port->disk; | |
1331 | ||
1332 | set_capacity(disk, port->capacity); | |
1333 | add_disk(disk); | |
1334 | activated++; | |
1335 | } | |
1336 | ||
1337 | printk(KERN_INFO DRV_NAME "(%s): %d ports activated\n", | |
1338 | pci_name(host->pdev), activated); | |
1339 | ||
1340 | new_state = HST_PROBE_FINISHED; | |
1341 | reschedule = 1; | |
1342 | break; | |
1343 | } | |
1344 | ||
1345 | case HST_PROBE_FINISHED: | |
906c3b75 | 1346 | complete(&host->probe_comp); |
1da177e4 LT |
1347 | break; |
1348 | ||
1349 | case HST_ERROR: | |
1350 | /* FIXME: TODO */ | |
1351 | break; | |
1352 | ||
1353 | default: | |
1354 | /* should never occur */ | |
1355 | printk(KERN_ERR PFX "BUG: unknown state %d\n", state); | |
1356 | assert(0); | |
1357 | break; | |
1358 | } | |
1359 | ||
1360 | if (new_state != HST_INVALID) { | |
1361 | spin_lock_irqsave(&host->lock, flags); | |
1362 | host->state = new_state; | |
1363 | spin_unlock_irqrestore(&host->lock, flags); | |
1364 | } | |
1365 | if (reschedule) | |
1366 | schedule_work(&host->fsm_task); | |
1367 | } | |
1368 | ||
1369 | static int carm_init_wait(void __iomem *mmio, u32 bits, unsigned int test_bit) | |
1370 | { | |
1371 | unsigned int i; | |
1372 | ||
1373 | for (i = 0; i < 50000; i++) { | |
1374 | u32 tmp = readl(mmio + CARM_LMUC); | |
1375 | udelay(100); | |
1376 | ||
1377 | if (test_bit) { | |
1378 | if ((tmp & bits) == bits) | |
1379 | return 0; | |
1380 | } else { | |
1381 | if ((tmp & bits) == 0) | |
1382 | return 0; | |
1383 | } | |
1384 | ||
1385 | cond_resched(); | |
1386 | } | |
1387 | ||
1388 | printk(KERN_ERR PFX "carm_init_wait timeout, bits == 0x%x, test_bit == %s\n", | |
1389 | bits, test_bit ? "yes" : "no"); | |
1390 | return -EBUSY; | |
1391 | } | |
1392 | ||
1393 | static void carm_init_responses(struct carm_host *host) | |
1394 | { | |
1395 | void __iomem *mmio = host->mmio; | |
1396 | unsigned int i; | |
1397 | struct carm_response *resp = (struct carm_response *) host->shm; | |
1398 | ||
1399 | for (i = 0; i < RMSG_Q_LEN; i++) | |
1400 | resp[i].status = cpu_to_le32(0xffffffff); | |
1401 | ||
1402 | writel(0, mmio + CARM_RESP_IDX); | |
1403 | } | |
1404 | ||
1405 | static int carm_init_host(struct carm_host *host) | |
1406 | { | |
1407 | void __iomem *mmio = host->mmio; | |
1408 | u32 tmp; | |
1409 | u8 tmp8; | |
1410 | int rc; | |
1411 | ||
1412 | DPRINTK("ENTER\n"); | |
1413 | ||
1414 | writel(0, mmio + CARM_INT_MASK); | |
1415 | ||
1416 | tmp8 = readb(mmio + CARM_INITC); | |
1417 | if (tmp8 & 0x01) { | |
1418 | tmp8 &= ~0x01; | |
1419 | writeb(tmp8, mmio + CARM_INITC); | |
1420 | readb(mmio + CARM_INITC); /* flush */ | |
1421 | ||
1422 | DPRINTK("snooze...\n"); | |
1423 | msleep(5000); | |
1424 | } | |
1425 | ||
1426 | tmp = readl(mmio + CARM_HMUC); | |
1427 | if (tmp & CARM_CME) { | |
1428 | DPRINTK("CME bit present, waiting\n"); | |
1429 | rc = carm_init_wait(mmio, CARM_CME, 1); | |
1430 | if (rc) { | |
1431 | DPRINTK("EXIT, carm_init_wait 1 failed\n"); | |
1432 | return rc; | |
1433 | } | |
1434 | } | |
1435 | if (tmp & CARM_RME) { | |
1436 | DPRINTK("RME bit present, waiting\n"); | |
1437 | rc = carm_init_wait(mmio, CARM_RME, 1); | |
1438 | if (rc) { | |
1439 | DPRINTK("EXIT, carm_init_wait 2 failed\n"); | |
1440 | return rc; | |
1441 | } | |
1442 | } | |
1443 | ||
1444 | tmp &= ~(CARM_RME | CARM_CME); | |
1445 | writel(tmp, mmio + CARM_HMUC); | |
1446 | readl(mmio + CARM_HMUC); /* flush */ | |
1447 | ||
1448 | rc = carm_init_wait(mmio, CARM_RME | CARM_CME, 0); | |
1449 | if (rc) { | |
1450 | DPRINTK("EXIT, carm_init_wait 3 failed\n"); | |
1451 | return rc; | |
1452 | } | |
1453 | ||
1454 | carm_init_buckets(mmio); | |
1455 | ||
1456 | writel(host->shm_dma & 0xffffffff, mmio + RBUF_ADDR_LO); | |
1457 | writel((host->shm_dma >> 16) >> 16, mmio + RBUF_ADDR_HI); | |
1458 | writel(RBUF_LEN, mmio + RBUF_BYTE_SZ); | |
1459 | ||
1460 | tmp = readl(mmio + CARM_HMUC); | |
1461 | tmp |= (CARM_RME | CARM_CME | CARM_WZBC); | |
1462 | writel(tmp, mmio + CARM_HMUC); | |
1463 | readl(mmio + CARM_HMUC); /* flush */ | |
1464 | ||
1465 | rc = carm_init_wait(mmio, CARM_RME | CARM_CME, 1); | |
1466 | if (rc) { | |
1467 | DPRINTK("EXIT, carm_init_wait 4 failed\n"); | |
1468 | return rc; | |
1469 | } | |
1470 | ||
1471 | writel(0, mmio + CARM_HMPHA); | |
1472 | writel(INT_DEF_MASK, mmio + CARM_INT_MASK); | |
1473 | ||
1474 | carm_init_responses(host); | |
1475 | ||
1476 | /* start initialization, probing state machine */ | |
1477 | spin_lock_irq(&host->lock); | |
1478 | assert(host->state == HST_INVALID); | |
1479 | host->state = HST_PROBE_START; | |
1480 | spin_unlock_irq(&host->lock); | |
1481 | schedule_work(&host->fsm_task); | |
1482 | ||
1483 | DPRINTK("EXIT\n"); | |
1484 | return 0; | |
1485 | } | |
1486 | ||
1487 | static int carm_init_disks(struct carm_host *host) | |
1488 | { | |
1489 | unsigned int i; | |
1490 | int rc = 0; | |
1491 | ||
1492 | for (i = 0; i < CARM_MAX_PORTS; i++) { | |
1493 | struct gendisk *disk; | |
165125e1 | 1494 | struct request_queue *q; |
1da177e4 LT |
1495 | struct carm_port *port; |
1496 | ||
1497 | port = &host->port[i]; | |
1498 | port->host = host; | |
1499 | port->port_no = i; | |
1500 | ||
1501 | disk = alloc_disk(CARM_MINORS_PER_MAJOR); | |
1502 | if (!disk) { | |
1503 | rc = -ENOMEM; | |
1504 | break; | |
1505 | } | |
1506 | ||
1507 | port->disk = disk; | |
1508 | sprintf(disk->disk_name, DRV_NAME "/%u", | |
1509 | (unsigned int) (host->id * CARM_MAX_PORTS) + i); | |
1da177e4 LT |
1510 | disk->major = host->major; |
1511 | disk->first_minor = i * CARM_MINORS_PER_MAJOR; | |
1512 | disk->fops = &carm_bd_ops; | |
1513 | disk->private_data = port; | |
1514 | ||
1515 | q = blk_init_queue(carm_rq_fn, &host->lock); | |
1516 | if (!q) { | |
1517 | rc = -ENOMEM; | |
1518 | break; | |
1519 | } | |
1520 | disk->queue = q; | |
1521 | blk_queue_max_hw_segments(q, CARM_MAX_REQ_SG); | |
1522 | blk_queue_max_phys_segments(q, CARM_MAX_REQ_SG); | |
1523 | blk_queue_segment_boundary(q, CARM_SG_BOUNDARY); | |
1524 | ||
1525 | q->queuedata = port; | |
1526 | } | |
1527 | ||
1528 | return rc; | |
1529 | } | |
1530 | ||
1531 | static void carm_free_disks(struct carm_host *host) | |
1532 | { | |
1533 | unsigned int i; | |
1534 | ||
1535 | for (i = 0; i < CARM_MAX_PORTS; i++) { | |
1536 | struct gendisk *disk = host->port[i].disk; | |
1537 | if (disk) { | |
165125e1 | 1538 | struct request_queue *q = disk->queue; |
1da177e4 LT |
1539 | |
1540 | if (disk->flags & GENHD_FL_UP) | |
1541 | del_gendisk(disk); | |
1542 | if (q) | |
1543 | blk_cleanup_queue(q); | |
1544 | put_disk(disk); | |
1545 | } | |
1546 | } | |
1547 | } | |
1548 | ||
1549 | static int carm_init_shm(struct carm_host *host) | |
1550 | { | |
1551 | host->shm = pci_alloc_consistent(host->pdev, CARM_SHM_SIZE, | |
1552 | &host->shm_dma); | |
1553 | if (!host->shm) | |
1554 | return -ENOMEM; | |
1555 | ||
1556 | host->msg_base = host->shm + RBUF_LEN; | |
1557 | host->msg_dma = host->shm_dma + RBUF_LEN; | |
1558 | ||
1559 | memset(host->shm, 0xff, RBUF_LEN); | |
1560 | memset(host->msg_base, 0, PDC_SHM_SIZE - RBUF_LEN); | |
1561 | ||
1562 | return 0; | |
1563 | } | |
1564 | ||
1565 | static int carm_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) | |
1566 | { | |
1da177e4 LT |
1567 | struct carm_host *host; |
1568 | unsigned int pci_dac; | |
1569 | int rc; | |
165125e1 | 1570 | struct request_queue *q; |
1da177e4 LT |
1571 | unsigned int i; |
1572 | ||
49b3a3cb | 1573 | printk_once(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n"); |
1da177e4 LT |
1574 | |
1575 | rc = pci_enable_device(pdev); | |
1576 | if (rc) | |
1577 | return rc; | |
1578 | ||
1579 | rc = pci_request_regions(pdev, DRV_NAME); | |
1580 | if (rc) | |
1581 | goto err_out; | |
1582 | ||
44456d37 | 1583 | #ifdef IF_64BIT_DMA_IS_POSSIBLE /* grrrr... */ |
6a35528a | 1584 | rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); |
1da177e4 | 1585 | if (!rc) { |
6a35528a | 1586 | rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); |
1da177e4 LT |
1587 | if (rc) { |
1588 | printk(KERN_ERR DRV_NAME "(%s): consistent DMA mask failure\n", | |
1589 | pci_name(pdev)); | |
1590 | goto err_out_regions; | |
1591 | } | |
1592 | pci_dac = 1; | |
1593 | } else { | |
1594 | #endif | |
284901a9 | 1595 | rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); |
1da177e4 LT |
1596 | if (rc) { |
1597 | printk(KERN_ERR DRV_NAME "(%s): DMA mask failure\n", | |
1598 | pci_name(pdev)); | |
1599 | goto err_out_regions; | |
1600 | } | |
1601 | pci_dac = 0; | |
44456d37 | 1602 | #ifdef IF_64BIT_DMA_IS_POSSIBLE /* grrrr... */ |
1da177e4 LT |
1603 | } |
1604 | #endif | |
1605 | ||
dd00cc48 | 1606 | host = kzalloc(sizeof(*host), GFP_KERNEL); |
1da177e4 LT |
1607 | if (!host) { |
1608 | printk(KERN_ERR DRV_NAME "(%s): memory alloc failure\n", | |
1609 | pci_name(pdev)); | |
1610 | rc = -ENOMEM; | |
1611 | goto err_out_regions; | |
1612 | } | |
1613 | ||
1da177e4 LT |
1614 | host->pdev = pdev; |
1615 | host->flags = pci_dac ? FL_DAC : 0; | |
1616 | spin_lock_init(&host->lock); | |
c4028958 | 1617 | INIT_WORK(&host->fsm_task, carm_fsm_task); |
906c3b75 | 1618 | init_completion(&host->probe_comp); |
1da177e4 LT |
1619 | |
1620 | for (i = 0; i < ARRAY_SIZE(host->req); i++) | |
1621 | host->req[i].tag = i; | |
1622 | ||
1623 | host->mmio = ioremap(pci_resource_start(pdev, 0), | |
1624 | pci_resource_len(pdev, 0)); | |
1625 | if (!host->mmio) { | |
1626 | printk(KERN_ERR DRV_NAME "(%s): MMIO alloc failure\n", | |
1627 | pci_name(pdev)); | |
1628 | rc = -ENOMEM; | |
1629 | goto err_out_kfree; | |
1630 | } | |
1631 | ||
1632 | rc = carm_init_shm(host); | |
1633 | if (rc) { | |
1634 | printk(KERN_ERR DRV_NAME "(%s): DMA SHM alloc failure\n", | |
1635 | pci_name(pdev)); | |
1636 | goto err_out_iounmap; | |
1637 | } | |
1638 | ||
1639 | q = blk_init_queue(carm_oob_rq_fn, &host->lock); | |
1640 | if (!q) { | |
1641 | printk(KERN_ERR DRV_NAME "(%s): OOB queue alloc failure\n", | |
1642 | pci_name(pdev)); | |
1643 | rc = -ENOMEM; | |
1644 | goto err_out_pci_free; | |
1645 | } | |
1646 | host->oob_q = q; | |
1647 | q->queuedata = host; | |
1648 | ||
1649 | /* | |
1650 | * Figure out which major to use: 160, 161, or dynamic | |
1651 | */ | |
1652 | if (!test_and_set_bit(0, &carm_major_alloc)) | |
1653 | host->major = 160; | |
1654 | else if (!test_and_set_bit(1, &carm_major_alloc)) | |
1655 | host->major = 161; | |
1656 | else | |
1657 | host->flags |= FL_DYN_MAJOR; | |
1658 | ||
1659 | host->id = carm_host_id; | |
1660 | sprintf(host->name, DRV_NAME "%d", carm_host_id); | |
1661 | ||
1662 | rc = register_blkdev(host->major, host->name); | |
1663 | if (rc < 0) | |
1664 | goto err_out_free_majors; | |
1665 | if (host->flags & FL_DYN_MAJOR) | |
1666 | host->major = rc; | |
1667 | ||
1da177e4 LT |
1668 | rc = carm_init_disks(host); |
1669 | if (rc) | |
1670 | goto err_out_blkdev_disks; | |
1671 | ||
1672 | pci_set_master(pdev); | |
1673 | ||
69ab3912 | 1674 | rc = request_irq(pdev->irq, carm_interrupt, IRQF_SHARED, DRV_NAME, host); |
1da177e4 LT |
1675 | if (rc) { |
1676 | printk(KERN_ERR DRV_NAME "(%s): irq alloc failure\n", | |
1677 | pci_name(pdev)); | |
1678 | goto err_out_blkdev_disks; | |
1679 | } | |
1680 | ||
1681 | rc = carm_init_host(host); | |
1682 | if (rc) | |
1683 | goto err_out_free_irq; | |
1684 | ||
906c3b75 SR |
1685 | DPRINTK("waiting for probe_comp\n"); |
1686 | wait_for_completion(&host->probe_comp); | |
1da177e4 | 1687 | |
e29419ff | 1688 | printk(KERN_INFO "%s: pci %s, ports %d, io %llx, irq %u, major %d\n", |
1da177e4 | 1689 | host->name, pci_name(pdev), (int) CARM_MAX_PORTS, |
e29419ff GKH |
1690 | (unsigned long long)pci_resource_start(pdev, 0), |
1691 | pdev->irq, host->major); | |
1da177e4 LT |
1692 | |
1693 | carm_host_id++; | |
1694 | pci_set_drvdata(pdev, host); | |
1695 | return 0; | |
1696 | ||
1697 | err_out_free_irq: | |
1698 | free_irq(pdev->irq, host); | |
1699 | err_out_blkdev_disks: | |
1700 | carm_free_disks(host); | |
1701 | unregister_blkdev(host->major, host->name); | |
1702 | err_out_free_majors: | |
1703 | if (host->major == 160) | |
1704 | clear_bit(0, &carm_major_alloc); | |
1705 | else if (host->major == 161) | |
1706 | clear_bit(1, &carm_major_alloc); | |
1707 | blk_cleanup_queue(host->oob_q); | |
1708 | err_out_pci_free: | |
1709 | pci_free_consistent(pdev, CARM_SHM_SIZE, host->shm, host->shm_dma); | |
1710 | err_out_iounmap: | |
1711 | iounmap(host->mmio); | |
1712 | err_out_kfree: | |
1713 | kfree(host); | |
1714 | err_out_regions: | |
1715 | pci_release_regions(pdev); | |
1716 | err_out: | |
1717 | pci_disable_device(pdev); | |
1718 | return rc; | |
1719 | } | |
1720 | ||
1721 | static void carm_remove_one (struct pci_dev *pdev) | |
1722 | { | |
1723 | struct carm_host *host = pci_get_drvdata(pdev); | |
1724 | ||
1725 | if (!host) { | |
1726 | printk(KERN_ERR PFX "BUG: no host data for PCI(%s)\n", | |
1727 | pci_name(pdev)); | |
1728 | return; | |
1729 | } | |
1730 | ||
1731 | free_irq(pdev->irq, host); | |
1732 | carm_free_disks(host); | |
1da177e4 LT |
1733 | unregister_blkdev(host->major, host->name); |
1734 | if (host->major == 160) | |
1735 | clear_bit(0, &carm_major_alloc); | |
1736 | else if (host->major == 161) | |
1737 | clear_bit(1, &carm_major_alloc); | |
1738 | blk_cleanup_queue(host->oob_q); | |
1739 | pci_free_consistent(pdev, CARM_SHM_SIZE, host->shm, host->shm_dma); | |
1740 | iounmap(host->mmio); | |
1741 | kfree(host); | |
1742 | pci_release_regions(pdev); | |
1743 | pci_disable_device(pdev); | |
1744 | pci_set_drvdata(pdev, NULL); | |
1745 | } | |
1746 | ||
1747 | static int __init carm_init(void) | |
1748 | { | |
9bfab8ce | 1749 | return pci_register_driver(&carm_driver); |
1da177e4 LT |
1750 | } |
1751 | ||
1752 | static void __exit carm_exit(void) | |
1753 | { | |
1754 | pci_unregister_driver(&carm_driver); | |
1755 | } | |
1756 | ||
1757 | module_init(carm_init); | |
1758 | module_exit(carm_exit); | |
1759 | ||
1760 |