blob: 087c94c8b2dab8559020466c548cb85edae6a46e [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * sx8.c: Driver for Promise SATA SX8 looks-like-I2O hardware
3 *
Jeff Garzik2d5a2ae2005-10-22 00:14:31 -04004 * Copyright 2004-2005 Red Hat, Inc.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 *
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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#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>
Tobias Klausera3948662005-06-20 23:49:08 +020028#include <linux/dma-mapping.h>
Steven Rostedt906c3b72006-01-09 15:59:26 -080029#include <linux/completion.h>
Ralf Baechle11763602007-10-23 20:42:11 +020030#include <linux/scatterlist.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include <asm/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include <asm/uaccess.h>
33
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#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"
Jeff Garzik2d5a2ae2005-10-22 00:14:31 -040044#define DRV_VERSION "1.0"
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#define PFX DRV_NAME ": "
46
Jeff Garzik2d5a2ae2005-10-22 00:14:31 -040047MODULE_AUTHOR("Jeff Garzik");
48MODULE_LICENSE("GPL");
49MODULE_DESCRIPTION("Promise SATA SX8 block driver");
50MODULE_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 */
68static int max_queue = 1;
69module_param(max_queue, int, 0444);
70MODULE_PARM_DESC(max_queue, "Maximum number of queued commands. (min==1, max==30, safe==1)");
71
72
Linus Torvalds1da177e2005-04-16 15:20:36 -070073#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
Harvey Harrisoncece9332008-04-21 09:51:04 +020082#define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
Linus Torvalds1da177e2005-04-16 15:20:36 -070083#ifdef CARM_VERBOSE_DEBUG
Harvey Harrisoncece9332008-04-21 09:51:04 +020084#define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
Linus Torvalds1da177e2005-04-16 15:20:36 -070085#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", \
Harvey Harrisoncece9332008-04-21 09:51:04 +020099 #expr, __FILE__, __func__, __LINE__); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 }
101#endif
102
103/* defines only for the constants which don't work well as enums */
104struct carm_host;
105
106enum {
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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 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
Jeff Garzik2d5a2ae2005-10-22 00:14:31 -0400204enum {
205 CARM_SG_BOUNDARY = 0xffffUL, /* s/g segment boundary */
206};
207
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208enum scatter_gather_types {
209 SGT_32BIT = 0,
210 SGT_64BIT = 1,
211};
212
213enum 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
228static 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
243struct carm_port {
244 unsigned int port_no;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 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
256struct 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
267struct 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
Jens Axboe165125e2007-07-24 09:28:11 +0200282 struct request_queue *oob_q;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 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;
Jens Axboe165125e2007-07-24 09:28:11 +0200291 struct request_queue *wait_q[CARM_MAX_WAIT_Q];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292
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
Steven Rostedt906c3b72006-01-09 15:59:26 -0800306 struct completion probe_comp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307};
308
309struct carm_response {
310 __le32 ret_handle;
311 __le32 status;
312} __attribute__((packed));
313
314struct carm_msg_sg {
315 __le32 start;
316 __le32 len;
317} __attribute__((packed));
318
319struct 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
331struct 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
348struct 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
358struct 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
367struct 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
376struct carm_fw_ver {
377 __le32 version;
378 u8 features;
379 u8 reserved1;
380 u16 reserved2;
381} __attribute__((packed));
382
383struct 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
408static int carm_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
409static void carm_remove_one (struct pci_dev *pdev);
Christoph Hellwiga885c8c2006-01-08 01:02:50 -0800410static int carm_bdev_getgeo(struct block_device *bdev, struct hd_geometry *geo);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411
412static 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};
417MODULE_DEVICE_TABLE(pci, carm_pci_tbl);
418
419static 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
426static struct block_device_operations carm_bd_ops = {
427 .owner = THIS_MODULE,
Christoph Hellwiga885c8c2006-01-08 01:02:50 -0800428 .getgeo = carm_bdev_getgeo,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429};
430
431static unsigned int carm_host_id;
432static unsigned long carm_major_alloc;
433
434
435
Christoph Hellwiga885c8c2006-01-08 01:02:50 -0800436static int carm_bdev_getgeo(struct block_device *bdev, struct hd_geometry *geo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437{
Christoph Hellwiga885c8c2006-01-08 01:02:50 -0800438 struct carm_port *port = bdev->bd_disk->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439
Christoph Hellwiga885c8c2006-01-08 01:02:50 -0800440 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444}
445
446static const u32 msg_sizes[] = { 32, 64, 128, CARM_MSG_SIZE };
447
448static 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;
Jeff Garzik2d5a2ae2005-10-22 00:14:31 -0400455
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 return -ENOENT;
457}
458
459static 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
467static 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
473static 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
479static 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
508static 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
Jeff Garzik2d5a2ae2005-10-22 00:14:31 -0400516 for (i = 0; i < max_queue; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 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);
Jens Axboe45711f12007-10-22 21:19:53 +0200526 sg_init_table(crq->sg, CARM_MAX_REQ_SG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527 return crq;
528 }
Jeff Garzik2d5a2ae2005-10-22 00:14:31 -0400529
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530 DPRINTK("no request available, returning NULL\n");
531 return NULL;
532}
533
534static int carm_put_request(struct carm_host *host, struct carm_request *crq)
535{
Jeff Garzik2d5a2ae2005-10-22 00:14:31 -0400536 assert(crq->tag < max_queue);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537
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
550static 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
582static 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);
Tejun Heo 867d1192005-04-24 02:06:05 -0500623 blk_insert_request(host->oob_q, crq->rq, 1, crq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624
625 return 0;
626
627err_out:
628 spin_lock_irq(&host->lock);
629 host->state = HST_ERROR;
630 spin_unlock_irq(&host->lock);
631 return rc;
632}
633
634typedef unsigned int (*carm_sspc_t)(struct carm_host *, unsigned int, void *);
635
636static 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);
Tejun Heo 867d1192005-04-24 02:06:05 -0500662 blk_insert_request(host->oob_q, crq->rq, 1, crq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663
664 return 0;
665}
666
667static 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
684static 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
709static 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
729static 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
745static inline void carm_end_request_queued(struct carm_host *host,
746 struct carm_request *crq,
Kiyoshi Uedaa9c73d02007-12-11 17:46:10 -0500747 int error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748{
749 struct request *req = crq->rq;
750 int rc;
751
Tejun Heo40cbbb72009-04-23 11:05:19 +0900752 __blk_end_request_all(req, error);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754 rc = carm_put_request(host, crq);
755 assert(rc == 0);
756}
757
Jens Axboe165125e2007-07-24 09:28:11 +0200758static inline void carm_push_q (struct carm_host *host, struct request_queue *q)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759{
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
Jens Axboe165125e2007-07-24 09:28:11 +0200770static inline struct request_queue *carm_pop_q(struct carm_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771{
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
783static inline void carm_round_robin(struct carm_host *host)
784{
Jens Axboe165125e2007-07-24 09:28:11 +0200785 struct request_queue *q = carm_pop_q(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786 if (q) {
787 blk_start_queue(q);
788 VPRINTK("STARTED QUEUE %p\n", q);
789 }
790}
791
792static inline void carm_end_rq(struct carm_host *host, struct carm_request *crq,
Kiyoshi Uedaa9c73d02007-12-11 17:46:10 -0500793 int error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794{
Kiyoshi Uedaa9c73d02007-12-11 17:46:10 -0500795 carm_end_request_queued(host, crq, error);
Jeff Garzik2d5a2ae2005-10-22 00:14:31 -0400796 if (max_queue == 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797 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
Jens Axboe165125e2007-07-24 09:28:11 +0200804static void carm_oob_rq_fn(struct request_queue *q)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805{
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");
813 rq = elv_next_request(q);
814 if (!rq)
815 break;
816
817 blkdev_dequeue_request(rq);
818
819 crq = rq->special;
820 assert(crq != NULL);
821 assert(crq->rq == rq);
822
823 crq->n_elem = 0;
824
825 DPRINTK("send req\n");
826 rc = carm_send_msg(host, crq);
827 if (rc) {
828 blk_requeue_request(q, rq);
829 carm_push_q(host, q);
830 return; /* call us again later, eventually */
831 }
832 }
833}
834
Jens Axboe165125e2007-07-24 09:28:11 +0200835static void carm_rq_fn(struct request_queue *q)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836{
837 struct carm_port *port = q->queuedata;
838 struct carm_host *host = port->host;
839 struct carm_msg_rw *msg;
840 struct carm_request *crq;
841 struct request *rq;
842 struct scatterlist *sg;
843 int writing = 0, pci_dir, i, n_elem, rc;
844 u32 tmp;
845 unsigned int msg_size;
846
847queue_one_request:
848 VPRINTK("get req\n");
849 rq = elv_next_request(q);
850 if (!rq)
851 return;
852
853 crq = carm_get_request(host);
854 if (!crq) {
855 carm_push_q(host, q);
856 return; /* call us again later, eventually */
857 }
858 crq->rq = rq;
859
860 blkdev_dequeue_request(rq);
861
862 if (rq_data_dir(rq) == WRITE) {
863 writing = 1;
864 pci_dir = PCI_DMA_TODEVICE;
865 } else {
866 pci_dir = PCI_DMA_FROMDEVICE;
867 }
868
869 /* get scatterlist from block layer */
870 sg = &crq->sg[0];
871 n_elem = blk_rq_map_sg(q, rq, sg);
872 if (n_elem <= 0) {
Kiyoshi Uedaa9c73d02007-12-11 17:46:10 -0500873 carm_end_rq(host, crq, -EIO);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874 return; /* request with no s/g entries? */
875 }
876
877 /* map scatterlist to PCI bus addresses */
878 n_elem = pci_map_sg(host->pdev, sg, n_elem, pci_dir);
879 if (n_elem <= 0) {
Kiyoshi Uedaa9c73d02007-12-11 17:46:10 -0500880 carm_end_rq(host, crq, -EIO);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881 return; /* request with no s/g entries? */
882 }
883 crq->n_elem = n_elem;
884 crq->port = port;
885 host->hw_sg_used += n_elem;
886
887 /*
888 * build read/write message
889 */
890
891 VPRINTK("build msg\n");
892 msg = (struct carm_msg_rw *) carm_ref_msg(host, crq->tag);
893
894 if (writing) {
895 msg->type = CARM_MSG_WRITE;
896 crq->msg_type = CARM_MSG_WRITE;
897 } else {
898 msg->type = CARM_MSG_READ;
899 crq->msg_type = CARM_MSG_READ;
900 }
901
902 msg->id = port->port_no;
903 msg->sg_count = n_elem;
904 msg->sg_type = SGT_32BIT;
905 msg->handle = cpu_to_le32(TAG_ENCODE(crq->tag));
Tejun Heo83096eb2009-05-07 22:24:39 +0900906 msg->lba = cpu_to_le32(blk_rq_pos(rq) & 0xffffffff);
907 tmp = (blk_rq_pos(rq) >> 16) >> 16;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908 msg->lba_high = cpu_to_le16( (u16) tmp );
Tejun Heo83096eb2009-05-07 22:24:39 +0900909 msg->lba_count = cpu_to_le16(blk_rq_sectors(rq));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910
911 msg_size = sizeof(struct carm_msg_rw) - sizeof(msg->sg);
912 for (i = 0; i < n_elem; i++) {
913 struct carm_msg_sg *carm_sg = &msg->sg[i];
914 carm_sg->start = cpu_to_le32(sg_dma_address(&crq->sg[i]));
915 carm_sg->len = cpu_to_le32(sg_dma_len(&crq->sg[i]));
916 msg_size += sizeof(struct carm_msg_sg);
917 }
918
919 rc = carm_lookup_bucket(msg_size);
920 BUG_ON(rc < 0);
921 crq->msg_bucket = (u32) rc;
922
923 /*
924 * queue read/write message to hardware
925 */
926
927 VPRINTK("send msg, tag == %u\n", crq->tag);
928 rc = carm_send_msg(host, crq);
929 if (rc) {
930 carm_put_request(host, crq);
931 blk_requeue_request(q, rq);
932 carm_push_q(host, q);
933 return; /* call us again later, eventually */
934 }
935
936 goto queue_one_request;
937}
938
939static void carm_handle_array_info(struct carm_host *host,
940 struct carm_request *crq, u8 *mem,
Kiyoshi Uedaa9c73d02007-12-11 17:46:10 -0500941 int error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942{
943 struct carm_port *port;
944 u8 *msg_data = mem + sizeof(struct carm_array_info);
945 struct carm_array_info *desc = (struct carm_array_info *) msg_data;
946 u64 lo, hi;
947 int cur_port;
948 size_t slen;
949
950 DPRINTK("ENTER\n");
951
Kiyoshi Uedaa9c73d02007-12-11 17:46:10 -0500952 carm_end_rq(host, crq, error);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953
Kiyoshi Uedaa9c73d02007-12-11 17:46:10 -0500954 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955 goto out;
956 if (le32_to_cpu(desc->array_status) & ARRAY_NO_EXIST)
957 goto out;
958
959 cur_port = host->cur_scan_dev;
960
961 /* should never occur */
962 if ((cur_port < 0) || (cur_port >= CARM_MAX_PORTS)) {
963 printk(KERN_ERR PFX "BUG: cur_scan_dev==%d, array_id==%d\n",
964 cur_port, (int) desc->array_id);
965 goto out;
966 }
967
968 port = &host->port[cur_port];
969
970 lo = (u64) le32_to_cpu(desc->size);
971 hi = (u64) le16_to_cpu(desc->size_hi);
972
973 port->capacity = lo | (hi << 32);
974 port->dev_geom_head = le16_to_cpu(desc->head);
975 port->dev_geom_sect = le16_to_cpu(desc->sect);
976 port->dev_geom_cyl = le16_to_cpu(desc->cyl);
977
978 host->dev_active |= (1 << cur_port);
979
980 strncpy(port->name, desc->name, sizeof(port->name));
981 port->name[sizeof(port->name) - 1] = 0;
982 slen = strlen(port->name);
983 while (slen && (port->name[slen - 1] == ' ')) {
984 port->name[slen - 1] = 0;
985 slen--;
986 }
987
988 printk(KERN_INFO DRV_NAME "(%s): port %u device %Lu sectors\n",
989 pci_name(host->pdev), port->port_no,
990 (unsigned long long) port->capacity);
991 printk(KERN_INFO DRV_NAME "(%s): port %u device \"%s\"\n",
992 pci_name(host->pdev), port->port_no, port->name);
993
994out:
995 assert(host->state == HST_DEV_SCAN);
996 schedule_work(&host->fsm_task);
997}
998
999static void carm_handle_scan_chan(struct carm_host *host,
1000 struct carm_request *crq, u8 *mem,
Kiyoshi Uedaa9c73d02007-12-11 17:46:10 -05001001 int error)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001002{
1003 u8 *msg_data = mem + IOC_SCAN_CHAN_OFFSET;
1004 unsigned int i, dev_count = 0;
1005 int new_state = HST_DEV_SCAN_START;
1006
1007 DPRINTK("ENTER\n");
1008
Kiyoshi Uedaa9c73d02007-12-11 17:46:10 -05001009 carm_end_rq(host, crq, error);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010
Kiyoshi Uedaa9c73d02007-12-11 17:46:10 -05001011 if (error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012 new_state = HST_ERROR;
1013 goto out;
1014 }
1015
1016 /* TODO: scan and support non-disk devices */
1017 for (i = 0; i < 8; i++)
1018 if (msg_data[i] == 0) { /* direct-access device (disk) */
1019 host->dev_present |= (1 << i);
1020 dev_count++;
1021 }
1022
1023 printk(KERN_INFO DRV_NAME "(%s): found %u interesting devices\n",
1024 pci_name(host->pdev), dev_count);
1025
1026out:
1027 assert(host->state == HST_PORT_SCAN);
1028 host->state = new_state;
1029 schedule_work(&host->fsm_task);
1030}
1031
1032static void carm_handle_generic(struct carm_host *host,
Kiyoshi Uedaa9c73d02007-12-11 17:46:10 -05001033 struct carm_request *crq, int error,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034 int cur_state, int next_state)
1035{
1036 DPRINTK("ENTER\n");
1037
Kiyoshi Uedaa9c73d02007-12-11 17:46:10 -05001038 carm_end_rq(host, crq, error);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039
1040 assert(host->state == cur_state);
Kiyoshi Uedaa9c73d02007-12-11 17:46:10 -05001041 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042 host->state = HST_ERROR;
Kiyoshi Uedaa9c73d02007-12-11 17:46:10 -05001043 else
1044 host->state = next_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045 schedule_work(&host->fsm_task);
1046}
1047
1048static inline void carm_handle_rw(struct carm_host *host,
Kiyoshi Uedaa9c73d02007-12-11 17:46:10 -05001049 struct carm_request *crq, int error)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050{
1051 int pci_dir;
1052
1053 VPRINTK("ENTER\n");
1054
1055 if (rq_data_dir(crq->rq) == WRITE)
1056 pci_dir = PCI_DMA_TODEVICE;
1057 else
1058 pci_dir = PCI_DMA_FROMDEVICE;
1059
1060 pci_unmap_sg(host->pdev, &crq->sg[0], crq->n_elem, pci_dir);
1061
Kiyoshi Uedaa9c73d02007-12-11 17:46:10 -05001062 carm_end_rq(host, crq, error);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063}
1064
1065static inline void carm_handle_resp(struct carm_host *host,
1066 __le32 ret_handle_le, u32 status)
1067{
1068 u32 handle = le32_to_cpu(ret_handle_le);
1069 unsigned int msg_idx;
1070 struct carm_request *crq;
Kiyoshi Uedaa9c73d02007-12-11 17:46:10 -05001071 int error = (status == RMSG_OK) ? 0 : -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072 u8 *mem;
1073
1074 VPRINTK("ENTER, handle == 0x%x\n", handle);
1075
1076 if (unlikely(!TAG_VALID(handle))) {
1077 printk(KERN_ERR DRV_NAME "(%s): BUG: invalid tag 0x%x\n",
1078 pci_name(host->pdev), handle);
1079 return;
1080 }
1081
1082 msg_idx = TAG_DECODE(handle);
1083 VPRINTK("tag == %u\n", msg_idx);
1084
1085 crq = &host->req[msg_idx];
1086
1087 /* fast path */
1088 if (likely(crq->msg_type == CARM_MSG_READ ||
1089 crq->msg_type == CARM_MSG_WRITE)) {
Kiyoshi Uedaa9c73d02007-12-11 17:46:10 -05001090 carm_handle_rw(host, crq, error);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091 return;
1092 }
1093
1094 mem = carm_ref_msg(host, msg_idx);
1095
1096 switch (crq->msg_type) {
1097 case CARM_MSG_IOCTL: {
1098 switch (crq->msg_subtype) {
1099 case CARM_IOC_SCAN_CHAN:
Kiyoshi Uedaa9c73d02007-12-11 17:46:10 -05001100 carm_handle_scan_chan(host, crq, mem, error);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101 break;
1102 default:
1103 /* unknown / invalid response */
1104 goto err_out;
1105 }
1106 break;
1107 }
1108
1109 case CARM_MSG_MISC: {
1110 switch (crq->msg_subtype) {
1111 case MISC_ALLOC_MEM:
Kiyoshi Uedaa9c73d02007-12-11 17:46:10 -05001112 carm_handle_generic(host, crq, error,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113 HST_ALLOC_BUF, HST_SYNC_TIME);
1114 break;
1115 case MISC_SET_TIME:
Kiyoshi Uedaa9c73d02007-12-11 17:46:10 -05001116 carm_handle_generic(host, crq, error,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001117 HST_SYNC_TIME, HST_GET_FW_VER);
1118 break;
1119 case MISC_GET_FW_VER: {
1120 struct carm_fw_ver *ver = (struct carm_fw_ver *)
1121 mem + sizeof(struct carm_msg_get_fw_ver);
Kiyoshi Uedaa9c73d02007-12-11 17:46:10 -05001122 if (!error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001123 host->fw_ver = le32_to_cpu(ver->version);
1124 host->flags |= (ver->features & FL_FW_VER_MASK);
1125 }
Kiyoshi Uedaa9c73d02007-12-11 17:46:10 -05001126 carm_handle_generic(host, crq, error,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127 HST_GET_FW_VER, HST_PORT_SCAN);
1128 break;
1129 }
1130 default:
1131 /* unknown / invalid response */
1132 goto err_out;
1133 }
1134 break;
1135 }
1136
1137 case CARM_MSG_ARRAY: {
1138 switch (crq->msg_subtype) {
1139 case CARM_ARRAY_INFO:
Kiyoshi Uedaa9c73d02007-12-11 17:46:10 -05001140 carm_handle_array_info(host, crq, mem, error);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001141 break;
1142 default:
1143 /* unknown / invalid response */
1144 goto err_out;
1145 }
1146 break;
1147 }
1148
1149 default:
1150 /* unknown / invalid response */
1151 goto err_out;
1152 }
1153
1154 return;
1155
1156err_out:
1157 printk(KERN_WARNING DRV_NAME "(%s): BUG: unhandled message type %d/%d\n",
1158 pci_name(host->pdev), crq->msg_type, crq->msg_subtype);
Kiyoshi Uedaa9c73d02007-12-11 17:46:10 -05001159 carm_end_rq(host, crq, -EIO);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160}
1161
1162static inline void carm_handle_responses(struct carm_host *host)
1163{
1164 void __iomem *mmio = host->mmio;
1165 struct carm_response *resp = (struct carm_response *) host->shm;
1166 unsigned int work = 0;
1167 unsigned int idx = host->resp_idx % RMSG_Q_LEN;
1168
1169 while (1) {
1170 u32 status = le32_to_cpu(resp[idx].status);
1171
1172 if (status == 0xffffffff) {
1173 VPRINTK("ending response on index %u\n", idx);
1174 writel(idx << 3, mmio + CARM_RESP_IDX);
1175 break;
1176 }
1177
1178 /* response to a message we sent */
1179 else if ((status & (1 << 31)) == 0) {
1180 VPRINTK("handling msg response on index %u\n", idx);
1181 carm_handle_resp(host, resp[idx].ret_handle, status);
1182 resp[idx].status = cpu_to_le32(0xffffffff);
1183 }
1184
1185 /* asynchronous events the hardware throws our way */
1186 else if ((status & 0xff000000) == (1 << 31)) {
1187 u8 *evt_type_ptr = (u8 *) &resp[idx];
1188 u8 evt_type = *evt_type_ptr;
1189 printk(KERN_WARNING DRV_NAME "(%s): unhandled event type %d\n",
1190 pci_name(host->pdev), (int) evt_type);
1191 resp[idx].status = cpu_to_le32(0xffffffff);
1192 }
1193
1194 idx = NEXT_RESP(idx);
1195 work++;
1196 }
1197
1198 VPRINTK("EXIT, work==%u\n", work);
1199 host->resp_idx += work;
1200}
1201
David Howells7d12e782006-10-05 14:55:46 +01001202static irqreturn_t carm_interrupt(int irq, void *__host)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203{
1204 struct carm_host *host = __host;
1205 void __iomem *mmio;
1206 u32 mask;
1207 int handled = 0;
1208 unsigned long flags;
1209
1210 if (!host) {
1211 VPRINTK("no host\n");
1212 return IRQ_NONE;
1213 }
1214
1215 spin_lock_irqsave(&host->lock, flags);
1216
1217 mmio = host->mmio;
1218
1219 /* reading should also clear interrupts */
1220 mask = readl(mmio + CARM_INT_STAT);
1221
1222 if (mask == 0 || mask == 0xffffffff) {
1223 VPRINTK("no work, mask == 0x%x\n", mask);
1224 goto out;
1225 }
1226
1227 if (mask & INT_ACK_MASK)
1228 writel(mask, mmio + CARM_INT_STAT);
1229
1230 if (unlikely(host->state == HST_INVALID)) {
1231 VPRINTK("not initialized yet, mask = 0x%x\n", mask);
1232 goto out;
1233 }
1234
1235 if (mask & CARM_HAVE_RESP) {
1236 handled = 1;
1237 carm_handle_responses(host);
1238 }
1239
1240out:
1241 spin_unlock_irqrestore(&host->lock, flags);
1242 VPRINTK("EXIT\n");
1243 return IRQ_RETVAL(handled);
1244}
1245
David Howellsc4028952006-11-22 14:57:56 +00001246static void carm_fsm_task (struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247{
David Howellsc4028952006-11-22 14:57:56 +00001248 struct carm_host *host =
1249 container_of(work, struct carm_host, fsm_task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001250 unsigned long flags;
1251 unsigned int state;
1252 int rc, i, next_dev;
1253 int reschedule = 0;
1254 int new_state = HST_INVALID;
1255
1256 spin_lock_irqsave(&host->lock, flags);
1257 state = host->state;
1258 spin_unlock_irqrestore(&host->lock, flags);
1259
1260 DPRINTK("ENTER, state == %s\n", state_name[state]);
1261
1262 switch (state) {
1263 case HST_PROBE_START:
1264 new_state = HST_ALLOC_BUF;
1265 reschedule = 1;
1266 break;
1267
1268 case HST_ALLOC_BUF:
1269 rc = carm_send_special(host, carm_fill_alloc_buf);
1270 if (rc) {
1271 new_state = HST_ERROR;
1272 reschedule = 1;
1273 }
1274 break;
1275
1276 case HST_SYNC_TIME:
1277 rc = carm_send_special(host, carm_fill_sync_time);
1278 if (rc) {
1279 new_state = HST_ERROR;
1280 reschedule = 1;
1281 }
1282 break;
1283
1284 case HST_GET_FW_VER:
1285 rc = carm_send_special(host, carm_fill_get_fw_ver);
1286 if (rc) {
1287 new_state = HST_ERROR;
1288 reschedule = 1;
1289 }
1290 break;
1291
1292 case HST_PORT_SCAN:
1293 rc = carm_send_special(host, carm_fill_scan_channels);
1294 if (rc) {
1295 new_state = HST_ERROR;
1296 reschedule = 1;
1297 }
1298 break;
1299
1300 case HST_DEV_SCAN_START:
1301 host->cur_scan_dev = -1;
1302 new_state = HST_DEV_SCAN;
1303 reschedule = 1;
1304 break;
1305
1306 case HST_DEV_SCAN:
1307 next_dev = -1;
1308 for (i = host->cur_scan_dev + 1; i < CARM_MAX_PORTS; i++)
1309 if (host->dev_present & (1 << i)) {
1310 next_dev = i;
1311 break;
1312 }
1313
1314 if (next_dev >= 0) {
1315 host->cur_scan_dev = next_dev;
1316 rc = carm_array_info(host, next_dev);
1317 if (rc) {
1318 new_state = HST_ERROR;
1319 reschedule = 1;
1320 }
1321 } else {
1322 new_state = HST_DEV_ACTIVATE;
1323 reschedule = 1;
1324 }
1325 break;
1326
1327 case HST_DEV_ACTIVATE: {
1328 int activated = 0;
1329 for (i = 0; i < CARM_MAX_PORTS; i++)
1330 if (host->dev_active & (1 << i)) {
1331 struct carm_port *port = &host->port[i];
1332 struct gendisk *disk = port->disk;
1333
1334 set_capacity(disk, port->capacity);
1335 add_disk(disk);
1336 activated++;
1337 }
1338
1339 printk(KERN_INFO DRV_NAME "(%s): %d ports activated\n",
1340 pci_name(host->pdev), activated);
1341
1342 new_state = HST_PROBE_FINISHED;
1343 reschedule = 1;
1344 break;
1345 }
1346
1347 case HST_PROBE_FINISHED:
Steven Rostedt906c3b72006-01-09 15:59:26 -08001348 complete(&host->probe_comp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001349 break;
1350
1351 case HST_ERROR:
1352 /* FIXME: TODO */
1353 break;
1354
1355 default:
1356 /* should never occur */
1357 printk(KERN_ERR PFX "BUG: unknown state %d\n", state);
1358 assert(0);
1359 break;
1360 }
1361
1362 if (new_state != HST_INVALID) {
1363 spin_lock_irqsave(&host->lock, flags);
1364 host->state = new_state;
1365 spin_unlock_irqrestore(&host->lock, flags);
1366 }
1367 if (reschedule)
1368 schedule_work(&host->fsm_task);
1369}
1370
1371static int carm_init_wait(void __iomem *mmio, u32 bits, unsigned int test_bit)
1372{
1373 unsigned int i;
1374
1375 for (i = 0; i < 50000; i++) {
1376 u32 tmp = readl(mmio + CARM_LMUC);
1377 udelay(100);
1378
1379 if (test_bit) {
1380 if ((tmp & bits) == bits)
1381 return 0;
1382 } else {
1383 if ((tmp & bits) == 0)
1384 return 0;
1385 }
1386
1387 cond_resched();
1388 }
1389
1390 printk(KERN_ERR PFX "carm_init_wait timeout, bits == 0x%x, test_bit == %s\n",
1391 bits, test_bit ? "yes" : "no");
1392 return -EBUSY;
1393}
1394
1395static void carm_init_responses(struct carm_host *host)
1396{
1397 void __iomem *mmio = host->mmio;
1398 unsigned int i;
1399 struct carm_response *resp = (struct carm_response *) host->shm;
1400
1401 for (i = 0; i < RMSG_Q_LEN; i++)
1402 resp[i].status = cpu_to_le32(0xffffffff);
1403
1404 writel(0, mmio + CARM_RESP_IDX);
1405}
1406
1407static int carm_init_host(struct carm_host *host)
1408{
1409 void __iomem *mmio = host->mmio;
1410 u32 tmp;
1411 u8 tmp8;
1412 int rc;
1413
1414 DPRINTK("ENTER\n");
1415
1416 writel(0, mmio + CARM_INT_MASK);
1417
1418 tmp8 = readb(mmio + CARM_INITC);
1419 if (tmp8 & 0x01) {
1420 tmp8 &= ~0x01;
1421 writeb(tmp8, mmio + CARM_INITC);
1422 readb(mmio + CARM_INITC); /* flush */
1423
1424 DPRINTK("snooze...\n");
1425 msleep(5000);
1426 }
1427
1428 tmp = readl(mmio + CARM_HMUC);
1429 if (tmp & CARM_CME) {
1430 DPRINTK("CME bit present, waiting\n");
1431 rc = carm_init_wait(mmio, CARM_CME, 1);
1432 if (rc) {
1433 DPRINTK("EXIT, carm_init_wait 1 failed\n");
1434 return rc;
1435 }
1436 }
1437 if (tmp & CARM_RME) {
1438 DPRINTK("RME bit present, waiting\n");
1439 rc = carm_init_wait(mmio, CARM_RME, 1);
1440 if (rc) {
1441 DPRINTK("EXIT, carm_init_wait 2 failed\n");
1442 return rc;
1443 }
1444 }
1445
1446 tmp &= ~(CARM_RME | CARM_CME);
1447 writel(tmp, mmio + CARM_HMUC);
1448 readl(mmio + CARM_HMUC); /* flush */
1449
1450 rc = carm_init_wait(mmio, CARM_RME | CARM_CME, 0);
1451 if (rc) {
1452 DPRINTK("EXIT, carm_init_wait 3 failed\n");
1453 return rc;
1454 }
1455
1456 carm_init_buckets(mmio);
1457
1458 writel(host->shm_dma & 0xffffffff, mmio + RBUF_ADDR_LO);
1459 writel((host->shm_dma >> 16) >> 16, mmio + RBUF_ADDR_HI);
1460 writel(RBUF_LEN, mmio + RBUF_BYTE_SZ);
1461
1462 tmp = readl(mmio + CARM_HMUC);
1463 tmp |= (CARM_RME | CARM_CME | CARM_WZBC);
1464 writel(tmp, mmio + CARM_HMUC);
1465 readl(mmio + CARM_HMUC); /* flush */
1466
1467 rc = carm_init_wait(mmio, CARM_RME | CARM_CME, 1);
1468 if (rc) {
1469 DPRINTK("EXIT, carm_init_wait 4 failed\n");
1470 return rc;
1471 }
1472
1473 writel(0, mmio + CARM_HMPHA);
1474 writel(INT_DEF_MASK, mmio + CARM_INT_MASK);
1475
1476 carm_init_responses(host);
1477
1478 /* start initialization, probing state machine */
1479 spin_lock_irq(&host->lock);
1480 assert(host->state == HST_INVALID);
1481 host->state = HST_PROBE_START;
1482 spin_unlock_irq(&host->lock);
1483 schedule_work(&host->fsm_task);
1484
1485 DPRINTK("EXIT\n");
1486 return 0;
1487}
1488
1489static int carm_init_disks(struct carm_host *host)
1490{
1491 unsigned int i;
1492 int rc = 0;
1493
1494 for (i = 0; i < CARM_MAX_PORTS; i++) {
1495 struct gendisk *disk;
Jens Axboe165125e2007-07-24 09:28:11 +02001496 struct request_queue *q;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001497 struct carm_port *port;
1498
1499 port = &host->port[i];
1500 port->host = host;
1501 port->port_no = i;
1502
1503 disk = alloc_disk(CARM_MINORS_PER_MAJOR);
1504 if (!disk) {
1505 rc = -ENOMEM;
1506 break;
1507 }
1508
1509 port->disk = disk;
1510 sprintf(disk->disk_name, DRV_NAME "/%u",
1511 (unsigned int) (host->id * CARM_MAX_PORTS) + i);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001512 disk->major = host->major;
1513 disk->first_minor = i * CARM_MINORS_PER_MAJOR;
1514 disk->fops = &carm_bd_ops;
1515 disk->private_data = port;
1516
1517 q = blk_init_queue(carm_rq_fn, &host->lock);
1518 if (!q) {
1519 rc = -ENOMEM;
1520 break;
1521 }
1522 disk->queue = q;
1523 blk_queue_max_hw_segments(q, CARM_MAX_REQ_SG);
1524 blk_queue_max_phys_segments(q, CARM_MAX_REQ_SG);
1525 blk_queue_segment_boundary(q, CARM_SG_BOUNDARY);
1526
1527 q->queuedata = port;
1528 }
1529
1530 return rc;
1531}
1532
1533static void carm_free_disks(struct carm_host *host)
1534{
1535 unsigned int i;
1536
1537 for (i = 0; i < CARM_MAX_PORTS; i++) {
1538 struct gendisk *disk = host->port[i].disk;
1539 if (disk) {
Jens Axboe165125e2007-07-24 09:28:11 +02001540 struct request_queue *q = disk->queue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001541
1542 if (disk->flags & GENHD_FL_UP)
1543 del_gendisk(disk);
1544 if (q)
1545 blk_cleanup_queue(q);
1546 put_disk(disk);
1547 }
1548 }
1549}
1550
1551static int carm_init_shm(struct carm_host *host)
1552{
1553 host->shm = pci_alloc_consistent(host->pdev, CARM_SHM_SIZE,
1554 &host->shm_dma);
1555 if (!host->shm)
1556 return -ENOMEM;
1557
1558 host->msg_base = host->shm + RBUF_LEN;
1559 host->msg_dma = host->shm_dma + RBUF_LEN;
1560
1561 memset(host->shm, 0xff, RBUF_LEN);
1562 memset(host->msg_base, 0, PDC_SHM_SIZE - RBUF_LEN);
1563
1564 return 0;
1565}
1566
1567static int carm_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
1568{
1569 static unsigned int printed_version;
1570 struct carm_host *host;
1571 unsigned int pci_dac;
1572 int rc;
Jens Axboe165125e2007-07-24 09:28:11 +02001573 struct request_queue *q;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001574 unsigned int i;
1575
1576 if (!printed_version++)
1577 printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n");
1578
1579 rc = pci_enable_device(pdev);
1580 if (rc)
1581 return rc;
1582
1583 rc = pci_request_regions(pdev, DRV_NAME);
1584 if (rc)
1585 goto err_out;
1586
Olaf Hering44456d32005-07-27 11:45:17 -07001587#ifdef IF_64BIT_DMA_IS_POSSIBLE /* grrrr... */
Yang Hongyang6a355282009-04-06 19:01:13 -07001588 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001589 if (!rc) {
Yang Hongyang6a355282009-04-06 19:01:13 -07001590 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001591 if (rc) {
1592 printk(KERN_ERR DRV_NAME "(%s): consistent DMA mask failure\n",
1593 pci_name(pdev));
1594 goto err_out_regions;
1595 }
1596 pci_dac = 1;
1597 } else {
1598#endif
Yang Hongyang284901a2009-04-06 19:01:15 -07001599 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001600 if (rc) {
1601 printk(KERN_ERR DRV_NAME "(%s): DMA mask failure\n",
1602 pci_name(pdev));
1603 goto err_out_regions;
1604 }
1605 pci_dac = 0;
Olaf Hering44456d32005-07-27 11:45:17 -07001606#ifdef IF_64BIT_DMA_IS_POSSIBLE /* grrrr... */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001607 }
1608#endif
1609
Yoann Padioleaudd00cc42007-07-19 01:49:03 -07001610 host = kzalloc(sizeof(*host), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001611 if (!host) {
1612 printk(KERN_ERR DRV_NAME "(%s): memory alloc failure\n",
1613 pci_name(pdev));
1614 rc = -ENOMEM;
1615 goto err_out_regions;
1616 }
1617
Linus Torvalds1da177e2005-04-16 15:20:36 -07001618 host->pdev = pdev;
1619 host->flags = pci_dac ? FL_DAC : 0;
1620 spin_lock_init(&host->lock);
David Howellsc4028952006-11-22 14:57:56 +00001621 INIT_WORK(&host->fsm_task, carm_fsm_task);
Steven Rostedt906c3b72006-01-09 15:59:26 -08001622 init_completion(&host->probe_comp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001623
1624 for (i = 0; i < ARRAY_SIZE(host->req); i++)
1625 host->req[i].tag = i;
1626
1627 host->mmio = ioremap(pci_resource_start(pdev, 0),
1628 pci_resource_len(pdev, 0));
1629 if (!host->mmio) {
1630 printk(KERN_ERR DRV_NAME "(%s): MMIO alloc failure\n",
1631 pci_name(pdev));
1632 rc = -ENOMEM;
1633 goto err_out_kfree;
1634 }
1635
1636 rc = carm_init_shm(host);
1637 if (rc) {
1638 printk(KERN_ERR DRV_NAME "(%s): DMA SHM alloc failure\n",
1639 pci_name(pdev));
1640 goto err_out_iounmap;
1641 }
1642
1643 q = blk_init_queue(carm_oob_rq_fn, &host->lock);
1644 if (!q) {
1645 printk(KERN_ERR DRV_NAME "(%s): OOB queue alloc failure\n",
1646 pci_name(pdev));
1647 rc = -ENOMEM;
1648 goto err_out_pci_free;
1649 }
1650 host->oob_q = q;
1651 q->queuedata = host;
1652
1653 /*
1654 * Figure out which major to use: 160, 161, or dynamic
1655 */
1656 if (!test_and_set_bit(0, &carm_major_alloc))
1657 host->major = 160;
1658 else if (!test_and_set_bit(1, &carm_major_alloc))
1659 host->major = 161;
1660 else
1661 host->flags |= FL_DYN_MAJOR;
1662
1663 host->id = carm_host_id;
1664 sprintf(host->name, DRV_NAME "%d", carm_host_id);
1665
1666 rc = register_blkdev(host->major, host->name);
1667 if (rc < 0)
1668 goto err_out_free_majors;
1669 if (host->flags & FL_DYN_MAJOR)
1670 host->major = rc;
1671
Linus Torvalds1da177e2005-04-16 15:20:36 -07001672 rc = carm_init_disks(host);
1673 if (rc)
1674 goto err_out_blkdev_disks;
1675
1676 pci_set_master(pdev);
1677
Thomas Gleixner69ab3912006-07-01 19:29:32 -07001678 rc = request_irq(pdev->irq, carm_interrupt, IRQF_SHARED, DRV_NAME, host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001679 if (rc) {
1680 printk(KERN_ERR DRV_NAME "(%s): irq alloc failure\n",
1681 pci_name(pdev));
1682 goto err_out_blkdev_disks;
1683 }
1684
1685 rc = carm_init_host(host);
1686 if (rc)
1687 goto err_out_free_irq;
1688
Steven Rostedt906c3b72006-01-09 15:59:26 -08001689 DPRINTK("waiting for probe_comp\n");
1690 wait_for_completion(&host->probe_comp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001691
Greg Kroah-Hartmane29419f2006-06-12 15:20:16 -07001692 printk(KERN_INFO "%s: pci %s, ports %d, io %llx, irq %u, major %d\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001693 host->name, pci_name(pdev), (int) CARM_MAX_PORTS,
Greg Kroah-Hartmane29419f2006-06-12 15:20:16 -07001694 (unsigned long long)pci_resource_start(pdev, 0),
1695 pdev->irq, host->major);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001696
1697 carm_host_id++;
1698 pci_set_drvdata(pdev, host);
1699 return 0;
1700
1701err_out_free_irq:
1702 free_irq(pdev->irq, host);
1703err_out_blkdev_disks:
1704 carm_free_disks(host);
1705 unregister_blkdev(host->major, host->name);
1706err_out_free_majors:
1707 if (host->major == 160)
1708 clear_bit(0, &carm_major_alloc);
1709 else if (host->major == 161)
1710 clear_bit(1, &carm_major_alloc);
1711 blk_cleanup_queue(host->oob_q);
1712err_out_pci_free:
1713 pci_free_consistent(pdev, CARM_SHM_SIZE, host->shm, host->shm_dma);
1714err_out_iounmap:
1715 iounmap(host->mmio);
1716err_out_kfree:
1717 kfree(host);
1718err_out_regions:
1719 pci_release_regions(pdev);
1720err_out:
1721 pci_disable_device(pdev);
1722 return rc;
1723}
1724
1725static void carm_remove_one (struct pci_dev *pdev)
1726{
1727 struct carm_host *host = pci_get_drvdata(pdev);
1728
1729 if (!host) {
1730 printk(KERN_ERR PFX "BUG: no host data for PCI(%s)\n",
1731 pci_name(pdev));
1732 return;
1733 }
1734
1735 free_irq(pdev->irq, host);
1736 carm_free_disks(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001737 unregister_blkdev(host->major, host->name);
1738 if (host->major == 160)
1739 clear_bit(0, &carm_major_alloc);
1740 else if (host->major == 161)
1741 clear_bit(1, &carm_major_alloc);
1742 blk_cleanup_queue(host->oob_q);
1743 pci_free_consistent(pdev, CARM_SHM_SIZE, host->shm, host->shm_dma);
1744 iounmap(host->mmio);
1745 kfree(host);
1746 pci_release_regions(pdev);
1747 pci_disable_device(pdev);
1748 pci_set_drvdata(pdev, NULL);
1749}
1750
1751static int __init carm_init(void)
1752{
Richard Knutsson9bfab8c2005-11-30 00:59:34 +01001753 return pci_register_driver(&carm_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001754}
1755
1756static void __exit carm_exit(void)
1757{
1758 pci_unregister_driver(&carm_driver);
1759}
1760
1761module_init(carm_init);
1762module_exit(carm_exit);
1763
1764