4753b3c6a2c2ab6743a7a6b4767c202d7d656aa8
[muen/linux.git] / drivers / scsi / mvsas / mv_sas.c
1 /*
2  * Marvell 88SE64xx/88SE94xx main function
3  *
4  * Copyright 2007 Red Hat, Inc.
5  * Copyright 2008 Marvell. <kewei@marvell.com>
6  * Copyright 2009-2011 Marvell. <yuxiangl@marvell.com>
7  *
8  * This file is licensed under GPLv2.
9  *
10  * This program is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU General Public License as
12  * published by the Free Software Foundation; version 2 of the
13  * License.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
18  * General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
23  * USA
24 */
25
26 #include "mv_sas.h"
27
28 static int mvs_find_tag(struct mvs_info *mvi, struct sas_task *task, u32 *tag)
29 {
30         if (task->lldd_task) {
31                 struct mvs_slot_info *slot;
32                 slot = task->lldd_task;
33                 *tag = slot->slot_tag;
34                 return 1;
35         }
36         return 0;
37 }
38
39 void mvs_tag_clear(struct mvs_info *mvi, u32 tag)
40 {
41         void *bitmap = mvi->tags;
42         clear_bit(tag, bitmap);
43 }
44
45 void mvs_tag_free(struct mvs_info *mvi, u32 tag)
46 {
47         mvs_tag_clear(mvi, tag);
48 }
49
50 void mvs_tag_set(struct mvs_info *mvi, unsigned int tag)
51 {
52         void *bitmap = mvi->tags;
53         set_bit(tag, bitmap);
54 }
55
56 inline int mvs_tag_alloc(struct mvs_info *mvi, u32 *tag_out)
57 {
58         unsigned int index, tag;
59         void *bitmap = mvi->tags;
60
61         index = find_first_zero_bit(bitmap, mvi->tags_num);
62         tag = index;
63         if (tag >= mvi->tags_num)
64                 return -SAS_QUEUE_FULL;
65         mvs_tag_set(mvi, tag);
66         *tag_out = tag;
67         return 0;
68 }
69
70 void mvs_tag_init(struct mvs_info *mvi)
71 {
72         int i;
73         for (i = 0; i < mvi->tags_num; ++i)
74                 mvs_tag_clear(mvi, i);
75 }
76
77 static struct mvs_info *mvs_find_dev_mvi(struct domain_device *dev)
78 {
79         unsigned long i = 0, j = 0, hi = 0;
80         struct sas_ha_struct *sha = dev->port->ha;
81         struct mvs_info *mvi = NULL;
82         struct asd_sas_phy *phy;
83
84         while (sha->sas_port[i]) {
85                 if (sha->sas_port[i] == dev->port) {
86                         phy =  container_of(sha->sas_port[i]->phy_list.next,
87                                 struct asd_sas_phy, port_phy_el);
88                         j = 0;
89                         while (sha->sas_phy[j]) {
90                                 if (sha->sas_phy[j] == phy)
91                                         break;
92                                 j++;
93                         }
94                         break;
95                 }
96                 i++;
97         }
98         hi = j/((struct mvs_prv_info *)sha->lldd_ha)->n_phy;
99         mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[hi];
100
101         return mvi;
102
103 }
104
105 static int mvs_find_dev_phyno(struct domain_device *dev, int *phyno)
106 {
107         unsigned long i = 0, j = 0, n = 0, num = 0;
108         struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
109         struct mvs_info *mvi = mvi_dev->mvi_info;
110         struct sas_ha_struct *sha = dev->port->ha;
111
112         while (sha->sas_port[i]) {
113                 if (sha->sas_port[i] == dev->port) {
114                         struct asd_sas_phy *phy;
115                         list_for_each_entry(phy,
116                                 &sha->sas_port[i]->phy_list, port_phy_el) {
117                                 j = 0;
118                                 while (sha->sas_phy[j]) {
119                                         if (sha->sas_phy[j] == phy)
120                                                 break;
121                                         j++;
122                                 }
123                                 phyno[n] = (j >= mvi->chip->n_phy) ?
124                                         (j - mvi->chip->n_phy) : j;
125                                 num++;
126                                 n++;
127                         }
128                         break;
129                 }
130                 i++;
131         }
132         return num;
133 }
134
135 struct mvs_device *mvs_find_dev_by_reg_set(struct mvs_info *mvi,
136                                                 u8 reg_set)
137 {
138         u32 dev_no;
139         for (dev_no = 0; dev_no < MVS_MAX_DEVICES; dev_no++) {
140                 if (mvi->devices[dev_no].taskfileset == MVS_ID_NOT_MAPPED)
141                         continue;
142
143                 if (mvi->devices[dev_no].taskfileset == reg_set)
144                         return &mvi->devices[dev_no];
145         }
146         return NULL;
147 }
148
149 static inline void mvs_free_reg_set(struct mvs_info *mvi,
150                                 struct mvs_device *dev)
151 {
152         if (!dev) {
153                 mv_printk("device has been free.\n");
154                 return;
155         }
156         if (dev->taskfileset == MVS_ID_NOT_MAPPED)
157                 return;
158         MVS_CHIP_DISP->free_reg_set(mvi, &dev->taskfileset);
159 }
160
161 static inline u8 mvs_assign_reg_set(struct mvs_info *mvi,
162                                 struct mvs_device *dev)
163 {
164         if (dev->taskfileset != MVS_ID_NOT_MAPPED)
165                 return 0;
166         return MVS_CHIP_DISP->assign_reg_set(mvi, &dev->taskfileset);
167 }
168
169 void mvs_phys_reset(struct mvs_info *mvi, u32 phy_mask, int hard)
170 {
171         u32 no;
172         for_each_phy(phy_mask, phy_mask, no) {
173                 if (!(phy_mask & 1))
174                         continue;
175                 MVS_CHIP_DISP->phy_reset(mvi, no, hard);
176         }
177 }
178
179 int mvs_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func,
180                         void *funcdata)
181 {
182         int rc = 0, phy_id = sas_phy->id;
183         u32 tmp, i = 0, hi;
184         struct sas_ha_struct *sha = sas_phy->ha;
185         struct mvs_info *mvi = NULL;
186
187         while (sha->sas_phy[i]) {
188                 if (sha->sas_phy[i] == sas_phy)
189                         break;
190                 i++;
191         }
192         hi = i/((struct mvs_prv_info *)sha->lldd_ha)->n_phy;
193         mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[hi];
194
195         switch (func) {
196         case PHY_FUNC_SET_LINK_RATE:
197                 MVS_CHIP_DISP->phy_set_link_rate(mvi, phy_id, funcdata);
198                 break;
199
200         case PHY_FUNC_HARD_RESET:
201                 tmp = MVS_CHIP_DISP->read_phy_ctl(mvi, phy_id);
202                 if (tmp & PHY_RST_HARD)
203                         break;
204                 MVS_CHIP_DISP->phy_reset(mvi, phy_id, MVS_HARD_RESET);
205                 break;
206
207         case PHY_FUNC_LINK_RESET:
208                 MVS_CHIP_DISP->phy_enable(mvi, phy_id);
209                 MVS_CHIP_DISP->phy_reset(mvi, phy_id, MVS_SOFT_RESET);
210                 break;
211
212         case PHY_FUNC_DISABLE:
213                 MVS_CHIP_DISP->phy_disable(mvi, phy_id);
214                 break;
215         case PHY_FUNC_RELEASE_SPINUP_HOLD:
216         default:
217                 rc = -ENOSYS;
218         }
219         msleep(200);
220         return rc;
221 }
222
223 void mvs_set_sas_addr(struct mvs_info *mvi, int port_id, u32 off_lo,
224                       u32 off_hi, u64 sas_addr)
225 {
226         u32 lo = (u32)sas_addr;
227         u32 hi = (u32)(sas_addr>>32);
228
229         MVS_CHIP_DISP->write_port_cfg_addr(mvi, port_id, off_lo);
230         MVS_CHIP_DISP->write_port_cfg_data(mvi, port_id, lo);
231         MVS_CHIP_DISP->write_port_cfg_addr(mvi, port_id, off_hi);
232         MVS_CHIP_DISP->write_port_cfg_data(mvi, port_id, hi);
233 }
234
235 static void mvs_bytes_dmaed(struct mvs_info *mvi, int i)
236 {
237         struct mvs_phy *phy = &mvi->phy[i];
238         struct asd_sas_phy *sas_phy = &phy->sas_phy;
239         struct sas_ha_struct *sas_ha;
240         if (!phy->phy_attached)
241                 return;
242
243         if (!(phy->att_dev_info & PORT_DEV_TRGT_MASK)
244                 && phy->phy_type & PORT_TYPE_SAS) {
245                 return;
246         }
247
248         sas_ha = mvi->sas;
249         sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE);
250
251         if (sas_phy->phy) {
252                 struct sas_phy *sphy = sas_phy->phy;
253
254                 sphy->negotiated_linkrate = sas_phy->linkrate;
255                 sphy->minimum_linkrate = phy->minimum_linkrate;
256                 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
257                 sphy->maximum_linkrate = phy->maximum_linkrate;
258                 sphy->maximum_linkrate_hw = MVS_CHIP_DISP->phy_max_link_rate();
259         }
260
261         if (phy->phy_type & PORT_TYPE_SAS) {
262                 struct sas_identify_frame *id;
263
264                 id = (struct sas_identify_frame *)phy->frame_rcvd;
265                 id->dev_type = phy->identify.device_type;
266                 id->initiator_bits = SAS_PROTOCOL_ALL;
267                 id->target_bits = phy->identify.target_port_protocols;
268
269                 /* direct attached SAS device */
270                 if (phy->att_dev_info & PORT_SSP_TRGT_MASK) {
271                         MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_PHY_STAT);
272                         MVS_CHIP_DISP->write_port_cfg_data(mvi, i, 0x00);
273                 }
274         } else if (phy->phy_type & PORT_TYPE_SATA) {
275                 /*Nothing*/
276         }
277         mv_dprintk("phy %d byte dmaded.\n", i + mvi->id * mvi->chip->n_phy);
278
279         sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
280
281         mvi->sas->notify_port_event(sas_phy,
282                                    PORTE_BYTES_DMAED);
283 }
284
285 void mvs_scan_start(struct Scsi_Host *shost)
286 {
287         int i, j;
288         unsigned short core_nr;
289         struct mvs_info *mvi;
290         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
291         struct mvs_prv_info *mvs_prv = sha->lldd_ha;
292
293         core_nr = ((struct mvs_prv_info *)sha->lldd_ha)->n_host;
294
295         for (j = 0; j < core_nr; j++) {
296                 mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[j];
297                 for (i = 0; i < mvi->chip->n_phy; ++i)
298                         mvs_bytes_dmaed(mvi, i);
299         }
300         mvs_prv->scan_finished = 1;
301 }
302
303 int mvs_scan_finished(struct Scsi_Host *shost, unsigned long time)
304 {
305         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
306         struct mvs_prv_info *mvs_prv = sha->lldd_ha;
307
308         if (mvs_prv->scan_finished == 0)
309                 return 0;
310
311         sas_drain_work(sha);
312         return 1;
313 }
314
315 static int mvs_task_prep_smp(struct mvs_info *mvi,
316                              struct mvs_task_exec_info *tei)
317 {
318         int elem, rc, i;
319         struct sas_ha_struct *sha = mvi->sas;
320         struct sas_task *task = tei->task;
321         struct mvs_cmd_hdr *hdr = tei->hdr;
322         struct domain_device *dev = task->dev;
323         struct asd_sas_port *sas_port = dev->port;
324         struct sas_phy *sphy = dev->phy;
325         struct asd_sas_phy *sas_phy = sha->sas_phy[sphy->number];
326         struct scatterlist *sg_req, *sg_resp;
327         u32 req_len, resp_len, tag = tei->tag;
328         void *buf_tmp;
329         u8 *buf_oaf;
330         dma_addr_t buf_tmp_dma;
331         void *buf_prd;
332         struct mvs_slot_info *slot = &mvi->slot_info[tag];
333         u32 flags = (tei->n_elem << MCH_PRD_LEN_SHIFT);
334
335         /*
336          * DMA-map SMP request, response buffers
337          */
338         sg_req = &task->smp_task.smp_req;
339         elem = dma_map_sg(mvi->dev, sg_req, 1, DMA_TO_DEVICE);
340         if (!elem)
341                 return -ENOMEM;
342         req_len = sg_dma_len(sg_req);
343
344         sg_resp = &task->smp_task.smp_resp;
345         elem = dma_map_sg(mvi->dev, sg_resp, 1, DMA_FROM_DEVICE);
346         if (!elem) {
347                 rc = -ENOMEM;
348                 goto err_out;
349         }
350         resp_len = SB_RFB_MAX;
351
352         /* must be in dwords */
353         if ((req_len & 0x3) || (resp_len & 0x3)) {
354                 rc = -EINVAL;
355                 goto err_out_2;
356         }
357
358         /*
359          * arrange MVS_SLOT_BUF_SZ-sized DMA buffer according to our needs
360          */
361
362         /* region 1: command table area (MVS_SSP_CMD_SZ bytes) ***** */
363         buf_tmp = slot->buf;
364         buf_tmp_dma = slot->buf_dma;
365
366         hdr->cmd_tbl = cpu_to_le64(sg_dma_address(sg_req));
367
368         /* region 2: open address frame area (MVS_OAF_SZ bytes) ********* */
369         buf_oaf = buf_tmp;
370         hdr->open_frame = cpu_to_le64(buf_tmp_dma);
371
372         buf_tmp += MVS_OAF_SZ;
373         buf_tmp_dma += MVS_OAF_SZ;
374
375         /* region 3: PRD table *********************************** */
376         buf_prd = buf_tmp;
377         if (tei->n_elem)
378                 hdr->prd_tbl = cpu_to_le64(buf_tmp_dma);
379         else
380                 hdr->prd_tbl = 0;
381
382         i = MVS_CHIP_DISP->prd_size() * tei->n_elem;
383         buf_tmp += i;
384         buf_tmp_dma += i;
385
386         /* region 4: status buffer (larger the PRD, smaller this buf) ****** */
387         slot->response = buf_tmp;
388         hdr->status_buf = cpu_to_le64(buf_tmp_dma);
389         if (mvi->flags & MVF_FLAG_SOC)
390                 hdr->reserved[0] = 0;
391
392         /*
393          * Fill in TX ring and command slot header
394          */
395         slot->tx = mvi->tx_prod;
396         mvi->tx[mvi->tx_prod] = cpu_to_le32((TXQ_CMD_SMP << TXQ_CMD_SHIFT) |
397                                         TXQ_MODE_I | tag |
398                                         (MVS_PHY_ID << TXQ_PHY_SHIFT));
399
400         hdr->flags |= flags;
401         hdr->lens = cpu_to_le32(((resp_len / 4) << 16) | ((req_len - 4) / 4));
402         hdr->tags = cpu_to_le32(tag);
403         hdr->data_len = 0;
404
405         /* generate open address frame hdr (first 12 bytes) */
406         /* initiator, SMP, ftype 1h */
407         buf_oaf[0] = (1 << 7) | (PROTOCOL_SMP << 4) | 0x01;
408         buf_oaf[1] = min(sas_port->linkrate, dev->linkrate) & 0xf;
409         *(u16 *)(buf_oaf + 2) = 0xFFFF;         /* SAS SPEC */
410         memcpy(buf_oaf + 4, dev->sas_addr, SAS_ADDR_SIZE);
411
412         /* fill in PRD (scatter/gather) table, if any */
413         MVS_CHIP_DISP->make_prd(task->scatter, tei->n_elem, buf_prd);
414
415         return 0;
416
417 err_out_2:
418         dma_unmap_sg(mvi->dev, &tei->task->smp_task.smp_resp, 1,
419                      DMA_FROM_DEVICE);
420 err_out:
421         dma_unmap_sg(mvi->dev, &tei->task->smp_task.smp_req, 1,
422                      DMA_TO_DEVICE);
423         return rc;
424 }
425
426 static u32 mvs_get_ncq_tag(struct sas_task *task, u32 *tag)
427 {
428         struct ata_queued_cmd *qc = task->uldd_task;
429
430         if (qc) {
431                 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
432                     qc->tf.command == ATA_CMD_FPDMA_READ ||
433                     qc->tf.command == ATA_CMD_FPDMA_RECV ||
434                     qc->tf.command == ATA_CMD_FPDMA_SEND ||
435                     qc->tf.command == ATA_CMD_NCQ_NON_DATA) {
436                         *tag = qc->tag;
437                         return 1;
438                 }
439         }
440
441         return 0;
442 }
443
444 static int mvs_task_prep_ata(struct mvs_info *mvi,
445                              struct mvs_task_exec_info *tei)
446 {
447         struct sas_task *task = tei->task;
448         struct domain_device *dev = task->dev;
449         struct mvs_device *mvi_dev = dev->lldd_dev;
450         struct mvs_cmd_hdr *hdr = tei->hdr;
451         struct asd_sas_port *sas_port = dev->port;
452         struct mvs_slot_info *slot;
453         void *buf_prd;
454         u32 tag = tei->tag, hdr_tag;
455         u32 flags, del_q;
456         void *buf_tmp;
457         u8 *buf_cmd, *buf_oaf;
458         dma_addr_t buf_tmp_dma;
459         u32 i, req_len, resp_len;
460         const u32 max_resp_len = SB_RFB_MAX;
461
462         if (mvs_assign_reg_set(mvi, mvi_dev) == MVS_ID_NOT_MAPPED) {
463                 mv_dprintk("Have not enough regiset for dev %d.\n",
464                         mvi_dev->device_id);
465                 return -EBUSY;
466         }
467         slot = &mvi->slot_info[tag];
468         slot->tx = mvi->tx_prod;
469         del_q = TXQ_MODE_I | tag |
470                 (TXQ_CMD_STP << TXQ_CMD_SHIFT) |
471                 ((sas_port->phy_mask & TXQ_PHY_MASK) << TXQ_PHY_SHIFT) |
472                 (mvi_dev->taskfileset << TXQ_SRS_SHIFT);
473         mvi->tx[mvi->tx_prod] = cpu_to_le32(del_q);
474
475         if (task->data_dir == DMA_FROM_DEVICE)
476                 flags = (MVS_CHIP_DISP->prd_count() << MCH_PRD_LEN_SHIFT);
477         else
478                 flags = (tei->n_elem << MCH_PRD_LEN_SHIFT);
479
480         if (task->ata_task.use_ncq)
481                 flags |= MCH_FPDMA;
482         if (dev->sata_dev.class == ATA_DEV_ATAPI) {
483                 if (task->ata_task.fis.command != ATA_CMD_ID_ATAPI)
484                         flags |= MCH_ATAPI;
485         }
486
487         hdr->flags = cpu_to_le32(flags);
488
489         if (task->ata_task.use_ncq && mvs_get_ncq_tag(task, &hdr_tag))
490                 task->ata_task.fis.sector_count |= (u8) (hdr_tag << 3);
491         else
492                 hdr_tag = tag;
493
494         hdr->tags = cpu_to_le32(hdr_tag);
495
496         hdr->data_len = cpu_to_le32(task->total_xfer_len);
497
498         /*
499          * arrange MVS_SLOT_BUF_SZ-sized DMA buffer according to our needs
500          */
501
502         /* region 1: command table area (MVS_ATA_CMD_SZ bytes) ************** */
503         buf_cmd = buf_tmp = slot->buf;
504         buf_tmp_dma = slot->buf_dma;
505
506         hdr->cmd_tbl = cpu_to_le64(buf_tmp_dma);
507
508         buf_tmp += MVS_ATA_CMD_SZ;
509         buf_tmp_dma += MVS_ATA_CMD_SZ;
510
511         /* region 2: open address frame area (MVS_OAF_SZ bytes) ********* */
512         /* used for STP.  unused for SATA? */
513         buf_oaf = buf_tmp;
514         hdr->open_frame = cpu_to_le64(buf_tmp_dma);
515
516         buf_tmp += MVS_OAF_SZ;
517         buf_tmp_dma += MVS_OAF_SZ;
518
519         /* region 3: PRD table ********************************************* */
520         buf_prd = buf_tmp;
521
522         if (tei->n_elem)
523                 hdr->prd_tbl = cpu_to_le64(buf_tmp_dma);
524         else
525                 hdr->prd_tbl = 0;
526         i = MVS_CHIP_DISP->prd_size() * MVS_CHIP_DISP->prd_count();
527
528         buf_tmp += i;
529         buf_tmp_dma += i;
530
531         /* region 4: status buffer (larger the PRD, smaller this buf) ****** */
532         slot->response = buf_tmp;
533         hdr->status_buf = cpu_to_le64(buf_tmp_dma);
534         if (mvi->flags & MVF_FLAG_SOC)
535                 hdr->reserved[0] = 0;
536
537         req_len = sizeof(struct host_to_dev_fis);
538         resp_len = MVS_SLOT_BUF_SZ - MVS_ATA_CMD_SZ -
539             sizeof(struct mvs_err_info) - i;
540
541         /* request, response lengths */
542         resp_len = min(resp_len, max_resp_len);
543         hdr->lens = cpu_to_le32(((resp_len / 4) << 16) | (req_len / 4));
544
545         if (likely(!task->ata_task.device_control_reg_update))
546                 task->ata_task.fis.flags |= 0x80; /* C=1: update ATA cmd reg */
547         /* fill in command FIS and ATAPI CDB */
548         memcpy(buf_cmd, &task->ata_task.fis, sizeof(struct host_to_dev_fis));
549         if (dev->sata_dev.class == ATA_DEV_ATAPI)
550                 memcpy(buf_cmd + STP_ATAPI_CMD,
551                         task->ata_task.atapi_packet, 16);
552
553         /* generate open address frame hdr (first 12 bytes) */
554         /* initiator, STP, ftype 1h */
555         buf_oaf[0] = (1 << 7) | (PROTOCOL_STP << 4) | 0x1;
556         buf_oaf[1] = min(sas_port->linkrate, dev->linkrate) & 0xf;
557         *(u16 *)(buf_oaf + 2) = cpu_to_be16(mvi_dev->device_id + 1);
558         memcpy(buf_oaf + 4, dev->sas_addr, SAS_ADDR_SIZE);
559
560         /* fill in PRD (scatter/gather) table, if any */
561         MVS_CHIP_DISP->make_prd(task->scatter, tei->n_elem, buf_prd);
562
563         if (task->data_dir == DMA_FROM_DEVICE)
564                 MVS_CHIP_DISP->dma_fix(mvi, sas_port->phy_mask,
565                                 TRASH_BUCKET_SIZE, tei->n_elem, buf_prd);
566
567         return 0;
568 }
569
570 static int mvs_task_prep_ssp(struct mvs_info *mvi,
571                              struct mvs_task_exec_info *tei, int is_tmf,
572                              struct mvs_tmf_task *tmf)
573 {
574         struct sas_task *task = tei->task;
575         struct mvs_cmd_hdr *hdr = tei->hdr;
576         struct mvs_port *port = tei->port;
577         struct domain_device *dev = task->dev;
578         struct mvs_device *mvi_dev = dev->lldd_dev;
579         struct asd_sas_port *sas_port = dev->port;
580         struct mvs_slot_info *slot;
581         void *buf_prd;
582         struct ssp_frame_hdr *ssp_hdr;
583         void *buf_tmp;
584         u8 *buf_cmd, *buf_oaf, fburst = 0;
585         dma_addr_t buf_tmp_dma;
586         u32 flags;
587         u32 resp_len, req_len, i, tag = tei->tag;
588         const u32 max_resp_len = SB_RFB_MAX;
589         u32 phy_mask;
590
591         slot = &mvi->slot_info[tag];
592
593         phy_mask = ((port->wide_port_phymap) ? port->wide_port_phymap :
594                 sas_port->phy_mask) & TXQ_PHY_MASK;
595
596         slot->tx = mvi->tx_prod;
597         mvi->tx[mvi->tx_prod] = cpu_to_le32(TXQ_MODE_I | tag |
598                                 (TXQ_CMD_SSP << TXQ_CMD_SHIFT) |
599                                 (phy_mask << TXQ_PHY_SHIFT));
600
601         flags = MCH_RETRY;
602         if (task->ssp_task.enable_first_burst) {
603                 flags |= MCH_FBURST;
604                 fburst = (1 << 7);
605         }
606         if (is_tmf)
607                 flags |= (MCH_SSP_FR_TASK << MCH_SSP_FR_TYPE_SHIFT);
608         else
609                 flags |= (MCH_SSP_FR_CMD << MCH_SSP_FR_TYPE_SHIFT);
610
611         hdr->flags = cpu_to_le32(flags | (tei->n_elem << MCH_PRD_LEN_SHIFT));
612         hdr->tags = cpu_to_le32(tag);
613         hdr->data_len = cpu_to_le32(task->total_xfer_len);
614
615         /*
616          * arrange MVS_SLOT_BUF_SZ-sized DMA buffer according to our needs
617          */
618
619         /* region 1: command table area (MVS_SSP_CMD_SZ bytes) ************** */
620         buf_cmd = buf_tmp = slot->buf;
621         buf_tmp_dma = slot->buf_dma;
622
623         hdr->cmd_tbl = cpu_to_le64(buf_tmp_dma);
624
625         buf_tmp += MVS_SSP_CMD_SZ;
626         buf_tmp_dma += MVS_SSP_CMD_SZ;
627
628         /* region 2: open address frame area (MVS_OAF_SZ bytes) ********* */
629         buf_oaf = buf_tmp;
630         hdr->open_frame = cpu_to_le64(buf_tmp_dma);
631
632         buf_tmp += MVS_OAF_SZ;
633         buf_tmp_dma += MVS_OAF_SZ;
634
635         /* region 3: PRD table ********************************************* */
636         buf_prd = buf_tmp;
637         if (tei->n_elem)
638                 hdr->prd_tbl = cpu_to_le64(buf_tmp_dma);
639         else
640                 hdr->prd_tbl = 0;
641
642         i = MVS_CHIP_DISP->prd_size() * tei->n_elem;
643         buf_tmp += i;
644         buf_tmp_dma += i;
645
646         /* region 4: status buffer (larger the PRD, smaller this buf) ****** */
647         slot->response = buf_tmp;
648         hdr->status_buf = cpu_to_le64(buf_tmp_dma);
649         if (mvi->flags & MVF_FLAG_SOC)
650                 hdr->reserved[0] = 0;
651
652         resp_len = MVS_SLOT_BUF_SZ - MVS_SSP_CMD_SZ - MVS_OAF_SZ -
653             sizeof(struct mvs_err_info) - i;
654         resp_len = min(resp_len, max_resp_len);
655
656         req_len = sizeof(struct ssp_frame_hdr) + 28;
657
658         /* request, response lengths */
659         hdr->lens = cpu_to_le32(((resp_len / 4) << 16) | (req_len / 4));
660
661         /* generate open address frame hdr (first 12 bytes) */
662         /* initiator, SSP, ftype 1h */
663         buf_oaf[0] = (1 << 7) | (PROTOCOL_SSP << 4) | 0x1;
664         buf_oaf[1] = min(sas_port->linkrate, dev->linkrate) & 0xf;
665         *(u16 *)(buf_oaf + 2) = cpu_to_be16(mvi_dev->device_id + 1);
666         memcpy(buf_oaf + 4, dev->sas_addr, SAS_ADDR_SIZE);
667
668         /* fill in SSP frame header (Command Table.SSP frame header) */
669         ssp_hdr = (struct ssp_frame_hdr *)buf_cmd;
670
671         if (is_tmf)
672                 ssp_hdr->frame_type = SSP_TASK;
673         else
674                 ssp_hdr->frame_type = SSP_COMMAND;
675
676         memcpy(ssp_hdr->hashed_dest_addr, dev->hashed_sas_addr,
677                HASHED_SAS_ADDR_SIZE);
678         memcpy(ssp_hdr->hashed_src_addr,
679                dev->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
680         ssp_hdr->tag = cpu_to_be16(tag);
681
682         /* fill in IU for TASK and Command Frame */
683         buf_cmd += sizeof(*ssp_hdr);
684         memcpy(buf_cmd, &task->ssp_task.LUN, 8);
685
686         if (ssp_hdr->frame_type != SSP_TASK) {
687                 buf_cmd[9] = fburst | task->ssp_task.task_attr |
688                                 (task->ssp_task.task_prio << 3);
689                 memcpy(buf_cmd + 12, task->ssp_task.cmd->cmnd,
690                        task->ssp_task.cmd->cmd_len);
691         } else{
692                 buf_cmd[10] = tmf->tmf;
693                 switch (tmf->tmf) {
694                 case TMF_ABORT_TASK:
695                 case TMF_QUERY_TASK:
696                         buf_cmd[12] =
697                                 (tmf->tag_of_task_to_be_managed >> 8) & 0xff;
698                         buf_cmd[13] =
699                                 tmf->tag_of_task_to_be_managed & 0xff;
700                         break;
701                 default:
702                         break;
703                 }
704         }
705         /* fill in PRD (scatter/gather) table, if any */
706         MVS_CHIP_DISP->make_prd(task->scatter, tei->n_elem, buf_prd);
707         return 0;
708 }
709
710 #define DEV_IS_GONE(mvi_dev)    ((!mvi_dev || (mvi_dev->dev_type == SAS_PHY_UNUSED)))
711 static int mvs_task_prep(struct sas_task *task, struct mvs_info *mvi, int is_tmf,
712                                 struct mvs_tmf_task *tmf, int *pass)
713 {
714         struct domain_device *dev = task->dev;
715         struct mvs_device *mvi_dev = dev->lldd_dev;
716         struct mvs_task_exec_info tei;
717         struct mvs_slot_info *slot;
718         u32 tag = 0xdeadbeef, n_elem = 0;
719         int rc = 0;
720
721         if (!dev->port) {
722                 struct task_status_struct *tsm = &task->task_status;
723
724                 tsm->resp = SAS_TASK_UNDELIVERED;
725                 tsm->stat = SAS_PHY_DOWN;
726                 /*
727                  * libsas will use dev->port, should
728                  * not call task_done for sata
729                  */
730                 if (dev->dev_type != SAS_SATA_DEV)
731                         task->task_done(task);
732                 return rc;
733         }
734
735         if (DEV_IS_GONE(mvi_dev)) {
736                 if (mvi_dev)
737                         mv_dprintk("device %d not ready.\n",
738                                 mvi_dev->device_id);
739                 else
740                         mv_dprintk("device %016llx not ready.\n",
741                                 SAS_ADDR(dev->sas_addr));
742
743                 rc = SAS_PHY_DOWN;
744                 return rc;
745         }
746         tei.port = dev->port->lldd_port;
747         if (tei.port && !tei.port->port_attached && !tmf) {
748                 if (sas_protocol_ata(task->task_proto)) {
749                         struct task_status_struct *ts = &task->task_status;
750                         mv_dprintk("SATA/STP port %d does not attach"
751                                         "device.\n", dev->port->id);
752                         ts->resp = SAS_TASK_COMPLETE;
753                         ts->stat = SAS_PHY_DOWN;
754
755                         task->task_done(task);
756
757                 } else {
758                         struct task_status_struct *ts = &task->task_status;
759                         mv_dprintk("SAS port %d does not attach"
760                                 "device.\n", dev->port->id);
761                         ts->resp = SAS_TASK_UNDELIVERED;
762                         ts->stat = SAS_PHY_DOWN;
763                         task->task_done(task);
764                 }
765                 return rc;
766         }
767
768         if (!sas_protocol_ata(task->task_proto)) {
769                 if (task->num_scatter) {
770                         n_elem = dma_map_sg(mvi->dev,
771                                             task->scatter,
772                                             task->num_scatter,
773                                             task->data_dir);
774                         if (!n_elem) {
775                                 rc = -ENOMEM;
776                                 goto prep_out;
777                         }
778                 }
779         } else {
780                 n_elem = task->num_scatter;
781         }
782
783         rc = mvs_tag_alloc(mvi, &tag);
784         if (rc)
785                 goto err_out;
786
787         slot = &mvi->slot_info[tag];
788
789         task->lldd_task = NULL;
790         slot->n_elem = n_elem;
791         slot->slot_tag = tag;
792
793         slot->buf = dma_pool_zalloc(mvi->dma_pool, GFP_ATOMIC, &slot->buf_dma);
794         if (!slot->buf) {
795                 rc = -ENOMEM;
796                 goto err_out_tag;
797         }
798
799         tei.task = task;
800         tei.hdr = &mvi->slot[tag];
801         tei.tag = tag;
802         tei.n_elem = n_elem;
803         switch (task->task_proto) {
804         case SAS_PROTOCOL_SMP:
805                 rc = mvs_task_prep_smp(mvi, &tei);
806                 break;
807         case SAS_PROTOCOL_SSP:
808                 rc = mvs_task_prep_ssp(mvi, &tei, is_tmf, tmf);
809                 break;
810         case SAS_PROTOCOL_SATA:
811         case SAS_PROTOCOL_STP:
812         case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
813                 rc = mvs_task_prep_ata(mvi, &tei);
814                 break;
815         default:
816                 dev_printk(KERN_ERR, mvi->dev,
817                         "unknown sas_task proto: 0x%x\n",
818                         task->task_proto);
819                 rc = -EINVAL;
820                 break;
821         }
822
823         if (rc) {
824                 mv_dprintk("rc is %x\n", rc);
825                 goto err_out_slot_buf;
826         }
827         slot->task = task;
828         slot->port = tei.port;
829         task->lldd_task = slot;
830         list_add_tail(&slot->entry, &tei.port->list);
831         spin_lock(&task->task_state_lock);
832         task->task_state_flags |= SAS_TASK_AT_INITIATOR;
833         spin_unlock(&task->task_state_lock);
834
835         mvi_dev->running_req++;
836         ++(*pass);
837         mvi->tx_prod = (mvi->tx_prod + 1) & (MVS_CHIP_SLOT_SZ - 1);
838
839         return rc;
840
841 err_out_slot_buf:
842         dma_pool_free(mvi->dma_pool, slot->buf, slot->buf_dma);
843 err_out_tag:
844         mvs_tag_free(mvi, tag);
845 err_out:
846
847         dev_printk(KERN_ERR, mvi->dev, "mvsas prep failed[%d]!\n", rc);
848         if (!sas_protocol_ata(task->task_proto))
849                 if (n_elem)
850                         dma_unmap_sg(mvi->dev, task->scatter, n_elem,
851                                      task->data_dir);
852 prep_out:
853         return rc;
854 }
855
856 static int mvs_task_exec(struct sas_task *task, gfp_t gfp_flags,
857                                 struct completion *completion, int is_tmf,
858                                 struct mvs_tmf_task *tmf)
859 {
860         struct mvs_info *mvi = NULL;
861         u32 rc = 0;
862         u32 pass = 0;
863         unsigned long flags = 0;
864
865         mvi = ((struct mvs_device *)task->dev->lldd_dev)->mvi_info;
866
867         spin_lock_irqsave(&mvi->lock, flags);
868         rc = mvs_task_prep(task, mvi, is_tmf, tmf, &pass);
869         if (rc)
870                 dev_printk(KERN_ERR, mvi->dev, "mvsas exec failed[%d]!\n", rc);
871
872         if (likely(pass))
873                         MVS_CHIP_DISP->start_delivery(mvi, (mvi->tx_prod - 1) &
874                                 (MVS_CHIP_SLOT_SZ - 1));
875         spin_unlock_irqrestore(&mvi->lock, flags);
876
877         return rc;
878 }
879
880 int mvs_queue_command(struct sas_task *task, gfp_t gfp_flags)
881 {
882         return mvs_task_exec(task, gfp_flags, NULL, 0, NULL);
883 }
884
885 static void mvs_slot_free(struct mvs_info *mvi, u32 rx_desc)
886 {
887         u32 slot_idx = rx_desc & RXQ_SLOT_MASK;
888         mvs_tag_clear(mvi, slot_idx);
889 }
890
891 static void mvs_slot_task_free(struct mvs_info *mvi, struct sas_task *task,
892                           struct mvs_slot_info *slot, u32 slot_idx)
893 {
894         if (!slot)
895                 return;
896         if (!slot->task)
897                 return;
898         if (!sas_protocol_ata(task->task_proto))
899                 if (slot->n_elem)
900                         dma_unmap_sg(mvi->dev, task->scatter,
901                                      slot->n_elem, task->data_dir);
902
903         switch (task->task_proto) {
904         case SAS_PROTOCOL_SMP:
905                 dma_unmap_sg(mvi->dev, &task->smp_task.smp_resp, 1,
906                              DMA_FROM_DEVICE);
907                 dma_unmap_sg(mvi->dev, &task->smp_task.smp_req, 1,
908                              DMA_TO_DEVICE);
909                 break;
910
911         case SAS_PROTOCOL_SATA:
912         case SAS_PROTOCOL_STP:
913         case SAS_PROTOCOL_SSP:
914         default:
915                 /* do nothing */
916                 break;
917         }
918
919         if (slot->buf) {
920                 dma_pool_free(mvi->dma_pool, slot->buf, slot->buf_dma);
921                 slot->buf = NULL;
922         }
923         list_del_init(&slot->entry);
924         task->lldd_task = NULL;
925         slot->task = NULL;
926         slot->port = NULL;
927         slot->slot_tag = 0xFFFFFFFF;
928         mvs_slot_free(mvi, slot_idx);
929 }
930
931 static void mvs_update_wideport(struct mvs_info *mvi, int phy_no)
932 {
933         struct mvs_phy *phy = &mvi->phy[phy_no];
934         struct mvs_port *port = phy->port;
935         int j, no;
936
937         for_each_phy(port->wide_port_phymap, j, no) {
938                 if (j & 1) {
939                         MVS_CHIP_DISP->write_port_cfg_addr(mvi, no,
940                                                 PHYR_WIDE_PORT);
941                         MVS_CHIP_DISP->write_port_cfg_data(mvi, no,
942                                                 port->wide_port_phymap);
943                 } else {
944                         MVS_CHIP_DISP->write_port_cfg_addr(mvi, no,
945                                                 PHYR_WIDE_PORT);
946                         MVS_CHIP_DISP->write_port_cfg_data(mvi, no,
947                                                 0);
948                 }
949         }
950 }
951
952 static u32 mvs_is_phy_ready(struct mvs_info *mvi, int i)
953 {
954         u32 tmp;
955         struct mvs_phy *phy = &mvi->phy[i];
956         struct mvs_port *port = phy->port;
957
958         tmp = MVS_CHIP_DISP->read_phy_ctl(mvi, i);
959         if ((tmp & PHY_READY_MASK) && !(phy->irq_status & PHYEV_POOF)) {
960                 if (!port)
961                         phy->phy_attached = 1;
962                 return tmp;
963         }
964
965         if (port) {
966                 if (phy->phy_type & PORT_TYPE_SAS) {
967                         port->wide_port_phymap &= ~(1U << i);
968                         if (!port->wide_port_phymap)
969                                 port->port_attached = 0;
970                         mvs_update_wideport(mvi, i);
971                 } else if (phy->phy_type & PORT_TYPE_SATA)
972                         port->port_attached = 0;
973                 phy->port = NULL;
974                 phy->phy_attached = 0;
975                 phy->phy_type &= ~(PORT_TYPE_SAS | PORT_TYPE_SATA);
976         }
977         return 0;
978 }
979
980 static void *mvs_get_d2h_reg(struct mvs_info *mvi, int i, void *buf)
981 {
982         u32 *s = (u32 *) buf;
983
984         if (!s)
985                 return NULL;
986
987         MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG3);
988         s[3] = cpu_to_le32(MVS_CHIP_DISP->read_port_cfg_data(mvi, i));
989
990         MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG2);
991         s[2] = cpu_to_le32(MVS_CHIP_DISP->read_port_cfg_data(mvi, i));
992
993         MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG1);
994         s[1] = cpu_to_le32(MVS_CHIP_DISP->read_port_cfg_data(mvi, i));
995
996         MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG0);
997         s[0] = cpu_to_le32(MVS_CHIP_DISP->read_port_cfg_data(mvi, i));
998
999         if (((s[1] & 0x00FFFFFF) == 0x00EB1401) && (*(u8 *)&s[3] == 0x01))
1000                 s[1] = 0x00EB1401 | (*((u8 *)&s[1] + 3) & 0x10);
1001
1002         return s;
1003 }
1004
1005 static u32 mvs_is_sig_fis_received(u32 irq_status)
1006 {
1007         return irq_status & PHYEV_SIG_FIS;
1008 }
1009
1010 static void mvs_sig_remove_timer(struct mvs_phy *phy)
1011 {
1012         if (phy->timer.function)
1013                 del_timer(&phy->timer);
1014         phy->timer.function = NULL;
1015 }
1016
1017 void mvs_update_phyinfo(struct mvs_info *mvi, int i, int get_st)
1018 {
1019         struct mvs_phy *phy = &mvi->phy[i];
1020         struct sas_identify_frame *id;
1021
1022         id = (struct sas_identify_frame *)phy->frame_rcvd;
1023
1024         if (get_st) {
1025                 phy->irq_status = MVS_CHIP_DISP->read_port_irq_stat(mvi, i);
1026                 phy->phy_status = mvs_is_phy_ready(mvi, i);
1027         }
1028
1029         if (phy->phy_status) {
1030                 int oob_done = 0;
1031                 struct asd_sas_phy *sas_phy = &mvi->phy[i].sas_phy;
1032
1033                 oob_done = MVS_CHIP_DISP->oob_done(mvi, i);
1034
1035                 MVS_CHIP_DISP->fix_phy_info(mvi, i, id);
1036                 if (phy->phy_type & PORT_TYPE_SATA) {
1037                         phy->identify.target_port_protocols = SAS_PROTOCOL_STP;
1038                         if (mvs_is_sig_fis_received(phy->irq_status)) {
1039                                 mvs_sig_remove_timer(phy);
1040                                 phy->phy_attached = 1;
1041                                 phy->att_dev_sas_addr =
1042                                         i + mvi->id * mvi->chip->n_phy;
1043                                 if (oob_done)
1044                                         sas_phy->oob_mode = SATA_OOB_MODE;
1045                                 phy->frame_rcvd_size =
1046                                     sizeof(struct dev_to_host_fis);
1047                                 mvs_get_d2h_reg(mvi, i, id);
1048                         } else {
1049                                 u32 tmp;
1050                                 dev_printk(KERN_DEBUG, mvi->dev,
1051                                         "Phy%d : No sig fis\n", i);
1052                                 tmp = MVS_CHIP_DISP->read_port_irq_mask(mvi, i);
1053                                 MVS_CHIP_DISP->write_port_irq_mask(mvi, i,
1054                                                 tmp | PHYEV_SIG_FIS);
1055                                 phy->phy_attached = 0;
1056                                 phy->phy_type &= ~PORT_TYPE_SATA;
1057                                 goto out_done;
1058                         }
1059                 }       else if (phy->phy_type & PORT_TYPE_SAS
1060                         || phy->att_dev_info & PORT_SSP_INIT_MASK) {
1061                         phy->phy_attached = 1;
1062                         phy->identify.device_type =
1063                                 phy->att_dev_info & PORT_DEV_TYPE_MASK;
1064
1065                         if (phy->identify.device_type == SAS_END_DEVICE)
1066                                 phy->identify.target_port_protocols =
1067                                                         SAS_PROTOCOL_SSP;
1068                         else if (phy->identify.device_type != SAS_PHY_UNUSED)
1069                                 phy->identify.target_port_protocols =
1070                                                         SAS_PROTOCOL_SMP;
1071                         if (oob_done)
1072                                 sas_phy->oob_mode = SAS_OOB_MODE;
1073                         phy->frame_rcvd_size =
1074                             sizeof(struct sas_identify_frame);
1075                 }
1076                 memcpy(sas_phy->attached_sas_addr,
1077                         &phy->att_dev_sas_addr, SAS_ADDR_SIZE);
1078
1079                 if (MVS_CHIP_DISP->phy_work_around)
1080                         MVS_CHIP_DISP->phy_work_around(mvi, i);
1081         }
1082         mv_dprintk("phy %d attach dev info is %x\n",
1083                 i + mvi->id * mvi->chip->n_phy, phy->att_dev_info);
1084         mv_dprintk("phy %d attach sas addr is %llx\n",
1085                 i + mvi->id * mvi->chip->n_phy, phy->att_dev_sas_addr);
1086 out_done:
1087         if (get_st)
1088                 MVS_CHIP_DISP->write_port_irq_stat(mvi, i, phy->irq_status);
1089 }
1090
1091 static void mvs_port_notify_formed(struct asd_sas_phy *sas_phy, int lock)
1092 {
1093         struct sas_ha_struct *sas_ha = sas_phy->ha;
1094         struct mvs_info *mvi = NULL; int i = 0, hi;
1095         struct mvs_phy *phy = sas_phy->lldd_phy;
1096         struct asd_sas_port *sas_port = sas_phy->port;
1097         struct mvs_port *port;
1098         unsigned long flags = 0;
1099         if (!sas_port)
1100                 return;
1101
1102         while (sas_ha->sas_phy[i]) {
1103                 if (sas_ha->sas_phy[i] == sas_phy)
1104                         break;
1105                 i++;
1106         }
1107         hi = i/((struct mvs_prv_info *)sas_ha->lldd_ha)->n_phy;
1108         mvi = ((struct mvs_prv_info *)sas_ha->lldd_ha)->mvi[hi];
1109         if (i >= mvi->chip->n_phy)
1110                 port = &mvi->port[i - mvi->chip->n_phy];
1111         else
1112                 port = &mvi->port[i];
1113         if (lock)
1114                 spin_lock_irqsave(&mvi->lock, flags);
1115         port->port_attached = 1;
1116         phy->port = port;
1117         sas_port->lldd_port = port;
1118         if (phy->phy_type & PORT_TYPE_SAS) {
1119                 port->wide_port_phymap = sas_port->phy_mask;
1120                 mv_printk("set wide port phy map %x\n", sas_port->phy_mask);
1121                 mvs_update_wideport(mvi, sas_phy->id);
1122
1123                 /* direct attached SAS device */
1124                 if (phy->att_dev_info & PORT_SSP_TRGT_MASK) {
1125                         MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_PHY_STAT);
1126                         MVS_CHIP_DISP->write_port_cfg_data(mvi, i, 0x04);
1127                 }
1128         }
1129         if (lock)
1130                 spin_unlock_irqrestore(&mvi->lock, flags);
1131 }
1132
1133 static void mvs_port_notify_deformed(struct asd_sas_phy *sas_phy, int lock)
1134 {
1135         struct domain_device *dev;
1136         struct mvs_phy *phy = sas_phy->lldd_phy;
1137         struct mvs_info *mvi = phy->mvi;
1138         struct asd_sas_port *port = sas_phy->port;
1139         int phy_no = 0;
1140
1141         while (phy != &mvi->phy[phy_no]) {
1142                 phy_no++;
1143                 if (phy_no >= MVS_MAX_PHYS)
1144                         return;
1145         }
1146         list_for_each_entry(dev, &port->dev_list, dev_list_node)
1147                 mvs_do_release_task(phy->mvi, phy_no, dev);
1148
1149 }
1150
1151
1152 void mvs_port_formed(struct asd_sas_phy *sas_phy)
1153 {
1154         mvs_port_notify_formed(sas_phy, 1);
1155 }
1156
1157 void mvs_port_deformed(struct asd_sas_phy *sas_phy)
1158 {
1159         mvs_port_notify_deformed(sas_phy, 1);
1160 }
1161
1162 static struct mvs_device *mvs_alloc_dev(struct mvs_info *mvi)
1163 {
1164         u32 dev;
1165         for (dev = 0; dev < MVS_MAX_DEVICES; dev++) {
1166                 if (mvi->devices[dev].dev_type == SAS_PHY_UNUSED) {
1167                         mvi->devices[dev].device_id = dev;
1168                         return &mvi->devices[dev];
1169                 }
1170         }
1171
1172         if (dev == MVS_MAX_DEVICES)
1173                 mv_printk("max support %d devices, ignore ..\n",
1174                         MVS_MAX_DEVICES);
1175
1176         return NULL;
1177 }
1178
1179 static void mvs_free_dev(struct mvs_device *mvi_dev)
1180 {
1181         u32 id = mvi_dev->device_id;
1182         memset(mvi_dev, 0, sizeof(*mvi_dev));
1183         mvi_dev->device_id = id;
1184         mvi_dev->dev_type = SAS_PHY_UNUSED;
1185         mvi_dev->dev_status = MVS_DEV_NORMAL;
1186         mvi_dev->taskfileset = MVS_ID_NOT_MAPPED;
1187 }
1188
1189 static int mvs_dev_found_notify(struct domain_device *dev, int lock)
1190 {
1191         unsigned long flags = 0;
1192         int res = 0;
1193         struct mvs_info *mvi = NULL;
1194         struct domain_device *parent_dev = dev->parent;
1195         struct mvs_device *mvi_device;
1196
1197         mvi = mvs_find_dev_mvi(dev);
1198
1199         if (lock)
1200                 spin_lock_irqsave(&mvi->lock, flags);
1201
1202         mvi_device = mvs_alloc_dev(mvi);
1203         if (!mvi_device) {
1204                 res = -1;
1205                 goto found_out;
1206         }
1207         dev->lldd_dev = mvi_device;
1208         mvi_device->dev_status = MVS_DEV_NORMAL;
1209         mvi_device->dev_type = dev->dev_type;
1210         mvi_device->mvi_info = mvi;
1211         mvi_device->sas_device = dev;
1212         if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
1213                 int phy_id;
1214                 u8 phy_num = parent_dev->ex_dev.num_phys;
1215                 struct ex_phy *phy;
1216                 for (phy_id = 0; phy_id < phy_num; phy_id++) {
1217                         phy = &parent_dev->ex_dev.ex_phy[phy_id];
1218                         if (SAS_ADDR(phy->attached_sas_addr) ==
1219                                 SAS_ADDR(dev->sas_addr)) {
1220                                 mvi_device->attached_phy = phy_id;
1221                                 break;
1222                         }
1223                 }
1224
1225                 if (phy_id == phy_num) {
1226                         mv_printk("Error: no attached dev:%016llx"
1227                                 "at ex:%016llx.\n",
1228                                 SAS_ADDR(dev->sas_addr),
1229                                 SAS_ADDR(parent_dev->sas_addr));
1230                         res = -1;
1231                 }
1232         }
1233
1234 found_out:
1235         if (lock)
1236                 spin_unlock_irqrestore(&mvi->lock, flags);
1237         return res;
1238 }
1239
1240 int mvs_dev_found(struct domain_device *dev)
1241 {
1242         return mvs_dev_found_notify(dev, 1);
1243 }
1244
1245 static void mvs_dev_gone_notify(struct domain_device *dev)
1246 {
1247         unsigned long flags = 0;
1248         struct mvs_device *mvi_dev = dev->lldd_dev;
1249         struct mvs_info *mvi;
1250
1251         if (!mvi_dev) {
1252                 mv_dprintk("found dev has gone.\n");
1253                 return;
1254         }
1255
1256         mvi = mvi_dev->mvi_info;
1257
1258         spin_lock_irqsave(&mvi->lock, flags);
1259
1260         mv_dprintk("found dev[%d:%x] is gone.\n",
1261                 mvi_dev->device_id, mvi_dev->dev_type);
1262         mvs_release_task(mvi, dev);
1263         mvs_free_reg_set(mvi, mvi_dev);
1264         mvs_free_dev(mvi_dev);
1265
1266         dev->lldd_dev = NULL;
1267         mvi_dev->sas_device = NULL;
1268
1269         spin_unlock_irqrestore(&mvi->lock, flags);
1270 }
1271
1272
1273 void mvs_dev_gone(struct domain_device *dev)
1274 {
1275         mvs_dev_gone_notify(dev);
1276 }
1277
1278 static void mvs_task_done(struct sas_task *task)
1279 {
1280         if (!del_timer(&task->slow_task->timer))
1281                 return;
1282         complete(&task->slow_task->completion);
1283 }
1284
1285 static void mvs_tmf_timedout(struct timer_list *t)
1286 {
1287         struct sas_task_slow *slow = from_timer(slow, t, timer);
1288         struct sas_task *task = slow->task;
1289
1290         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1291         complete(&task->slow_task->completion);
1292 }
1293
1294 #define MVS_TASK_TIMEOUT 20
1295 static int mvs_exec_internal_tmf_task(struct domain_device *dev,
1296                         void *parameter, u32 para_len, struct mvs_tmf_task *tmf)
1297 {
1298         int res, retry;
1299         struct sas_task *task = NULL;
1300
1301         for (retry = 0; retry < 3; retry++) {
1302                 task = sas_alloc_slow_task(GFP_KERNEL);
1303                 if (!task)
1304                         return -ENOMEM;
1305
1306                 task->dev = dev;
1307                 task->task_proto = dev->tproto;
1308
1309                 memcpy(&task->ssp_task, parameter, para_len);
1310                 task->task_done = mvs_task_done;
1311
1312                 task->slow_task->timer.function = mvs_tmf_timedout;
1313                 task->slow_task->timer.expires = jiffies + MVS_TASK_TIMEOUT*HZ;
1314                 add_timer(&task->slow_task->timer);
1315
1316                 res = mvs_task_exec(task, GFP_KERNEL, NULL, 1, tmf);
1317
1318                 if (res) {
1319                         del_timer(&task->slow_task->timer);
1320                         mv_printk("executing internal task failed:%d\n", res);
1321                         goto ex_err;
1322                 }
1323
1324                 wait_for_completion(&task->slow_task->completion);
1325                 res = TMF_RESP_FUNC_FAILED;
1326                 /* Even TMF timed out, return direct. */
1327                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1328                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1329                                 mv_printk("TMF task[%x] timeout.\n", tmf->tmf);
1330                                 goto ex_err;
1331                         }
1332                 }
1333
1334                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1335                     task->task_status.stat == SAM_STAT_GOOD) {
1336                         res = TMF_RESP_FUNC_COMPLETE;
1337                         break;
1338                 }
1339
1340                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1341                       task->task_status.stat == SAS_DATA_UNDERRUN) {
1342                         /* no error, but return the number of bytes of
1343                          * underrun */
1344                         res = task->task_status.residual;
1345                         break;
1346                 }
1347
1348                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1349                       task->task_status.stat == SAS_DATA_OVERRUN) {
1350                         mv_dprintk("blocked task error.\n");
1351                         res = -EMSGSIZE;
1352                         break;
1353                 } else {
1354                         mv_dprintk(" task to dev %016llx response: 0x%x "
1355                                     "status 0x%x\n",
1356                                     SAS_ADDR(dev->sas_addr),
1357                                     task->task_status.resp,
1358                                     task->task_status.stat);
1359                         sas_free_task(task);
1360                         task = NULL;
1361
1362                 }
1363         }
1364 ex_err:
1365         BUG_ON(retry == 3 && task != NULL);
1366         sas_free_task(task);
1367         return res;
1368 }
1369
1370 static int mvs_debug_issue_ssp_tmf(struct domain_device *dev,
1371                                 u8 *lun, struct mvs_tmf_task *tmf)
1372 {
1373         struct sas_ssp_task ssp_task;
1374         if (!(dev->tproto & SAS_PROTOCOL_SSP))
1375                 return TMF_RESP_FUNC_ESUPP;
1376
1377         memcpy(ssp_task.LUN, lun, 8);
1378
1379         return mvs_exec_internal_tmf_task(dev, &ssp_task,
1380                                 sizeof(ssp_task), tmf);
1381 }
1382
1383
1384 /*  Standard mandates link reset for ATA  (type 0)
1385     and hard reset for SSP (type 1) , only for RECOVERY */
1386 static int mvs_debug_I_T_nexus_reset(struct domain_device *dev)
1387 {
1388         int rc;
1389         struct sas_phy *phy = sas_get_local_phy(dev);
1390         int reset_type = (dev->dev_type == SAS_SATA_DEV ||
1391                         (dev->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
1392         rc = sas_phy_reset(phy, reset_type);
1393         sas_put_local_phy(phy);
1394         msleep(2000);
1395         return rc;
1396 }
1397
1398 /* mandatory SAM-3 */
1399 int mvs_lu_reset(struct domain_device *dev, u8 *lun)
1400 {
1401         unsigned long flags;
1402         int rc = TMF_RESP_FUNC_FAILED;
1403         struct mvs_tmf_task tmf_task;
1404         struct mvs_device * mvi_dev = dev->lldd_dev;
1405         struct mvs_info *mvi = mvi_dev->mvi_info;
1406
1407         tmf_task.tmf = TMF_LU_RESET;
1408         mvi_dev->dev_status = MVS_DEV_EH;
1409         rc = mvs_debug_issue_ssp_tmf(dev, lun, &tmf_task);
1410         if (rc == TMF_RESP_FUNC_COMPLETE) {
1411                 spin_lock_irqsave(&mvi->lock, flags);
1412                 mvs_release_task(mvi, dev);
1413                 spin_unlock_irqrestore(&mvi->lock, flags);
1414         }
1415         /* If failed, fall-through I_T_Nexus reset */
1416         mv_printk("%s for device[%x]:rc= %d\n", __func__,
1417                         mvi_dev->device_id, rc);
1418         return rc;
1419 }
1420
1421 int mvs_I_T_nexus_reset(struct domain_device *dev)
1422 {
1423         unsigned long flags;
1424         int rc = TMF_RESP_FUNC_FAILED;
1425     struct mvs_device * mvi_dev = (struct mvs_device *)dev->lldd_dev;
1426         struct mvs_info *mvi = mvi_dev->mvi_info;
1427
1428         if (mvi_dev->dev_status != MVS_DEV_EH)
1429                 return TMF_RESP_FUNC_COMPLETE;
1430         else
1431                 mvi_dev->dev_status = MVS_DEV_NORMAL;
1432         rc = mvs_debug_I_T_nexus_reset(dev);
1433         mv_printk("%s for device[%x]:rc= %d\n",
1434                 __func__, mvi_dev->device_id, rc);
1435
1436         spin_lock_irqsave(&mvi->lock, flags);
1437         mvs_release_task(mvi, dev);
1438         spin_unlock_irqrestore(&mvi->lock, flags);
1439
1440         return rc;
1441 }
1442 /* optional SAM-3 */
1443 int mvs_query_task(struct sas_task *task)
1444 {
1445         u32 tag;
1446         struct scsi_lun lun;
1447         struct mvs_tmf_task tmf_task;
1448         int rc = TMF_RESP_FUNC_FAILED;
1449
1450         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1451                 struct scsi_cmnd * cmnd = (struct scsi_cmnd *)task->uldd_task;
1452                 struct domain_device *dev = task->dev;
1453                 struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
1454                 struct mvs_info *mvi = mvi_dev->mvi_info;
1455
1456                 int_to_scsilun(cmnd->device->lun, &lun);
1457                 rc = mvs_find_tag(mvi, task, &tag);
1458                 if (rc == 0) {
1459                         rc = TMF_RESP_FUNC_FAILED;
1460                         return rc;
1461                 }
1462
1463                 tmf_task.tmf = TMF_QUERY_TASK;
1464                 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1465
1466                 rc = mvs_debug_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1467                 switch (rc) {
1468                 /* The task is still in Lun, release it then */
1469                 case TMF_RESP_FUNC_SUCC:
1470                 /* The task is not in Lun or failed, reset the phy */
1471                 case TMF_RESP_FUNC_FAILED:
1472                 case TMF_RESP_FUNC_COMPLETE:
1473                         break;
1474                 }
1475         }
1476         mv_printk("%s:rc= %d\n", __func__, rc);
1477         return rc;
1478 }
1479
1480 /*  mandatory SAM-3, still need free task/slot info */
1481 int mvs_abort_task(struct sas_task *task)
1482 {
1483         struct scsi_lun lun;
1484         struct mvs_tmf_task tmf_task;
1485         struct domain_device *dev = task->dev;
1486         struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
1487         struct mvs_info *mvi;
1488         int rc = TMF_RESP_FUNC_FAILED;
1489         unsigned long flags;
1490         u32 tag;
1491
1492         if (!mvi_dev) {
1493                 mv_printk("Device has removed\n");
1494                 return TMF_RESP_FUNC_FAILED;
1495         }
1496
1497         mvi = mvi_dev->mvi_info;
1498
1499         spin_lock_irqsave(&task->task_state_lock, flags);
1500         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1501                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1502                 rc = TMF_RESP_FUNC_COMPLETE;
1503                 goto out;
1504         }
1505         spin_unlock_irqrestore(&task->task_state_lock, flags);
1506         mvi_dev->dev_status = MVS_DEV_EH;
1507         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1508                 struct scsi_cmnd * cmnd = (struct scsi_cmnd *)task->uldd_task;
1509
1510                 int_to_scsilun(cmnd->device->lun, &lun);
1511                 rc = mvs_find_tag(mvi, task, &tag);
1512                 if (rc == 0) {
1513                         mv_printk("No such tag in %s\n", __func__);
1514                         rc = TMF_RESP_FUNC_FAILED;
1515                         return rc;
1516                 }
1517
1518                 tmf_task.tmf = TMF_ABORT_TASK;
1519                 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1520
1521                 rc = mvs_debug_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1522
1523                 /* if successful, clear the task and callback forwards.*/
1524                 if (rc == TMF_RESP_FUNC_COMPLETE) {
1525                         u32 slot_no;
1526                         struct mvs_slot_info *slot;
1527
1528                         if (task->lldd_task) {
1529                                 slot = task->lldd_task;
1530                                 slot_no = (u32) (slot - mvi->slot_info);
1531                                 spin_lock_irqsave(&mvi->lock, flags);
1532                                 mvs_slot_complete(mvi, slot_no, 1);
1533                                 spin_unlock_irqrestore(&mvi->lock, flags);
1534                         }
1535                 }
1536
1537         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1538                 task->task_proto & SAS_PROTOCOL_STP) {
1539                 if (SAS_SATA_DEV == dev->dev_type) {
1540                         struct mvs_slot_info *slot = task->lldd_task;
1541                         u32 slot_idx = (u32)(slot - mvi->slot_info);
1542                         mv_dprintk("mvs_abort_task() mvi=%p task=%p "
1543                                    "slot=%p slot_idx=x%x\n",
1544                                    mvi, task, slot, slot_idx);
1545                         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1546                         mvs_slot_task_free(mvi, task, slot, slot_idx);
1547                         rc = TMF_RESP_FUNC_COMPLETE;
1548                         goto out;
1549                 }
1550
1551         }
1552 out:
1553         if (rc != TMF_RESP_FUNC_COMPLETE)
1554                 mv_printk("%s:rc= %d\n", __func__, rc);
1555         return rc;
1556 }
1557
1558 int mvs_abort_task_set(struct domain_device *dev, u8 *lun)
1559 {
1560         int rc = TMF_RESP_FUNC_FAILED;
1561         struct mvs_tmf_task tmf_task;
1562
1563         tmf_task.tmf = TMF_ABORT_TASK_SET;
1564         rc = mvs_debug_issue_ssp_tmf(dev, lun, &tmf_task);
1565
1566         return rc;
1567 }
1568
1569 int mvs_clear_aca(struct domain_device *dev, u8 *lun)
1570 {
1571         int rc = TMF_RESP_FUNC_FAILED;
1572         struct mvs_tmf_task tmf_task;
1573
1574         tmf_task.tmf = TMF_CLEAR_ACA;
1575         rc = mvs_debug_issue_ssp_tmf(dev, lun, &tmf_task);
1576
1577         return rc;
1578 }
1579
1580 int mvs_clear_task_set(struct domain_device *dev, u8 *lun)
1581 {
1582         int rc = TMF_RESP_FUNC_FAILED;
1583         struct mvs_tmf_task tmf_task;
1584
1585         tmf_task.tmf = TMF_CLEAR_TASK_SET;
1586         rc = mvs_debug_issue_ssp_tmf(dev, lun, &tmf_task);
1587
1588         return rc;
1589 }
1590
1591 static int mvs_sata_done(struct mvs_info *mvi, struct sas_task *task,
1592                         u32 slot_idx, int err)
1593 {
1594         struct mvs_device *mvi_dev = task->dev->lldd_dev;
1595         struct task_status_struct *tstat = &task->task_status;
1596         struct ata_task_resp *resp = (struct ata_task_resp *)tstat->buf;
1597         int stat = SAM_STAT_GOOD;
1598
1599
1600         resp->frame_len = sizeof(struct dev_to_host_fis);
1601         memcpy(&resp->ending_fis[0],
1602                SATA_RECEIVED_D2H_FIS(mvi_dev->taskfileset),
1603                sizeof(struct dev_to_host_fis));
1604         tstat->buf_valid_size = sizeof(*resp);
1605         if (unlikely(err)) {
1606                 if (unlikely(err & CMD_ISS_STPD))
1607                         stat = SAS_OPEN_REJECT;
1608                 else
1609                         stat = SAS_PROTO_RESPONSE;
1610        }
1611
1612         return stat;
1613 }
1614
1615 static void mvs_set_sense(u8 *buffer, int len, int d_sense,
1616                 int key, int asc, int ascq)
1617 {
1618         memset(buffer, 0, len);
1619
1620         if (d_sense) {
1621                 /* Descriptor format */
1622                 if (len < 4) {
1623                         mv_printk("Length %d of sense buffer too small to "
1624                                 "fit sense %x:%x:%x", len, key, asc, ascq);
1625                 }
1626
1627                 buffer[0] = 0x72;               /* Response Code        */
1628                 if (len > 1)
1629                         buffer[1] = key;        /* Sense Key */
1630                 if (len > 2)
1631                         buffer[2] = asc;        /* ASC  */
1632                 if (len > 3)
1633                         buffer[3] = ascq;       /* ASCQ */
1634         } else {
1635                 if (len < 14) {
1636                         mv_printk("Length %d of sense buffer too small to "
1637                                 "fit sense %x:%x:%x", len, key, asc, ascq);
1638                 }
1639
1640                 buffer[0] = 0x70;               /* Response Code        */
1641                 if (len > 2)
1642                         buffer[2] = key;        /* Sense Key */
1643                 if (len > 7)
1644                         buffer[7] = 0x0a;       /* Additional Sense Length */
1645                 if (len > 12)
1646                         buffer[12] = asc;       /* ASC */
1647                 if (len > 13)
1648                         buffer[13] = ascq; /* ASCQ */
1649         }
1650
1651         return;
1652 }
1653
1654 static void mvs_fill_ssp_resp_iu(struct ssp_response_iu *iu,
1655                                 u8 key, u8 asc, u8 asc_q)
1656 {
1657         iu->datapres = 2;
1658         iu->response_data_len = 0;
1659         iu->sense_data_len = 17;
1660         iu->status = 02;
1661         mvs_set_sense(iu->sense_data, 17, 0,
1662                         key, asc, asc_q);
1663 }
1664
1665 static int mvs_slot_err(struct mvs_info *mvi, struct sas_task *task,
1666                          u32 slot_idx)
1667 {
1668         struct mvs_slot_info *slot = &mvi->slot_info[slot_idx];
1669         int stat;
1670         u32 err_dw0 = le32_to_cpu(*(u32 *)slot->response);
1671         u32 err_dw1 = le32_to_cpu(*((u32 *)slot->response + 1));
1672         u32 tfs = 0;
1673         enum mvs_port_type type = PORT_TYPE_SAS;
1674
1675         if (err_dw0 & CMD_ISS_STPD)
1676                 MVS_CHIP_DISP->issue_stop(mvi, type, tfs);
1677
1678         MVS_CHIP_DISP->command_active(mvi, slot_idx);
1679
1680         stat = SAM_STAT_CHECK_CONDITION;
1681         switch (task->task_proto) {
1682         case SAS_PROTOCOL_SSP:
1683         {
1684                 stat = SAS_ABORTED_TASK;
1685                 if ((err_dw0 & NO_DEST) || err_dw1 & bit(31)) {
1686                         struct ssp_response_iu *iu = slot->response +
1687                                 sizeof(struct mvs_err_info);
1688                         mvs_fill_ssp_resp_iu(iu, NOT_READY, 0x04, 01);
1689                         sas_ssp_task_response(mvi->dev, task, iu);
1690                         stat = SAM_STAT_CHECK_CONDITION;
1691                 }
1692                 if (err_dw1 & bit(31))
1693                         mv_printk("reuse same slot, retry command.\n");
1694                 break;
1695         }
1696         case SAS_PROTOCOL_SMP:
1697                 stat = SAM_STAT_CHECK_CONDITION;
1698                 break;
1699
1700         case SAS_PROTOCOL_SATA:
1701         case SAS_PROTOCOL_STP:
1702         case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
1703         {
1704                 task->ata_task.use_ncq = 0;
1705                 stat = SAS_PROTO_RESPONSE;
1706                 mvs_sata_done(mvi, task, slot_idx, err_dw0);
1707         }
1708                 break;
1709         default:
1710                 break;
1711         }
1712
1713         return stat;
1714 }
1715
1716 int mvs_slot_complete(struct mvs_info *mvi, u32 rx_desc, u32 flags)
1717 {
1718         u32 slot_idx = rx_desc & RXQ_SLOT_MASK;
1719         struct mvs_slot_info *slot = &mvi->slot_info[slot_idx];
1720         struct sas_task *task = slot->task;
1721         struct mvs_device *mvi_dev = NULL;
1722         struct task_status_struct *tstat;
1723         struct domain_device *dev;
1724         u32 aborted;
1725
1726         void *to;
1727         enum exec_status sts;
1728
1729         if (unlikely(!task || !task->lldd_task || !task->dev))
1730                 return -1;
1731
1732         tstat = &task->task_status;
1733         dev = task->dev;
1734         mvi_dev = dev->lldd_dev;
1735
1736         spin_lock(&task->task_state_lock);
1737         task->task_state_flags &=
1738                 ~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
1739         task->task_state_flags |= SAS_TASK_STATE_DONE;
1740         /* race condition*/
1741         aborted = task->task_state_flags & SAS_TASK_STATE_ABORTED;
1742         spin_unlock(&task->task_state_lock);
1743
1744         memset(tstat, 0, sizeof(*tstat));
1745         tstat->resp = SAS_TASK_COMPLETE;
1746
1747         if (unlikely(aborted)) {
1748                 tstat->stat = SAS_ABORTED_TASK;
1749                 if (mvi_dev && mvi_dev->running_req)
1750                         mvi_dev->running_req--;
1751                 if (sas_protocol_ata(task->task_proto))
1752                         mvs_free_reg_set(mvi, mvi_dev);
1753
1754                 mvs_slot_task_free(mvi, task, slot, slot_idx);
1755                 return -1;
1756         }
1757
1758         /* when no device attaching, go ahead and complete by error handling*/
1759         if (unlikely(!mvi_dev || flags)) {
1760                 if (!mvi_dev)
1761                         mv_dprintk("port has not device.\n");
1762                 tstat->stat = SAS_PHY_DOWN;
1763                 goto out;
1764         }
1765
1766         /*
1767          * error info record present; slot->response is 32 bit aligned but may
1768          * not be 64 bit aligned, so check for zero in two 32 bit reads
1769          */
1770         if (unlikely((rx_desc & RXQ_ERR)
1771                      && (*((u32 *)slot->response)
1772                          || *(((u32 *)slot->response) + 1)))) {
1773                 mv_dprintk("port %d slot %d rx_desc %X has error info"
1774                         "%016llX.\n", slot->port->sas_port.id, slot_idx,
1775                          rx_desc, get_unaligned_le64(slot->response));
1776                 tstat->stat = mvs_slot_err(mvi, task, slot_idx);
1777                 tstat->resp = SAS_TASK_COMPLETE;
1778                 goto out;
1779         }
1780
1781         switch (task->task_proto) {
1782         case SAS_PROTOCOL_SSP:
1783                 /* hw says status == 0, datapres == 0 */
1784                 if (rx_desc & RXQ_GOOD) {
1785                         tstat->stat = SAM_STAT_GOOD;
1786                         tstat->resp = SAS_TASK_COMPLETE;
1787                 }
1788                 /* response frame present */
1789                 else if (rx_desc & RXQ_RSP) {
1790                         struct ssp_response_iu *iu = slot->response +
1791                                                 sizeof(struct mvs_err_info);
1792                         sas_ssp_task_response(mvi->dev, task, iu);
1793                 } else
1794                         tstat->stat = SAM_STAT_CHECK_CONDITION;
1795                 break;
1796
1797         case SAS_PROTOCOL_SMP: {
1798                         struct scatterlist *sg_resp = &task->smp_task.smp_resp;
1799                         tstat->stat = SAM_STAT_GOOD;
1800                         to = kmap_atomic(sg_page(sg_resp));
1801                         memcpy(to + sg_resp->offset,
1802                                 slot->response + sizeof(struct mvs_err_info),
1803                                 sg_dma_len(sg_resp));
1804                         kunmap_atomic(to);
1805                         break;
1806                 }
1807
1808         case SAS_PROTOCOL_SATA:
1809         case SAS_PROTOCOL_STP:
1810         case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP: {
1811                         tstat->stat = mvs_sata_done(mvi, task, slot_idx, 0);
1812                         break;
1813                 }
1814
1815         default:
1816                 tstat->stat = SAM_STAT_CHECK_CONDITION;
1817                 break;
1818         }
1819         if (!slot->port->port_attached) {
1820                 mv_dprintk("port %d has removed.\n", slot->port->sas_port.id);
1821                 tstat->stat = SAS_PHY_DOWN;
1822         }
1823
1824
1825 out:
1826         if (mvi_dev && mvi_dev->running_req) {
1827                 mvi_dev->running_req--;
1828                 if (sas_protocol_ata(task->task_proto) && !mvi_dev->running_req)
1829                         mvs_free_reg_set(mvi, mvi_dev);
1830         }
1831         mvs_slot_task_free(mvi, task, slot, slot_idx);
1832         sts = tstat->stat;
1833
1834         spin_unlock(&mvi->lock);
1835         if (task->task_done)
1836                 task->task_done(task);
1837
1838         spin_lock(&mvi->lock);
1839
1840         return sts;
1841 }
1842
1843 void mvs_do_release_task(struct mvs_info *mvi,
1844                 int phy_no, struct domain_device *dev)
1845 {
1846         u32 slot_idx;
1847         struct mvs_phy *phy;
1848         struct mvs_port *port;
1849         struct mvs_slot_info *slot, *slot2;
1850
1851         phy = &mvi->phy[phy_no];
1852         port = phy->port;
1853         if (!port)
1854                 return;
1855         /* clean cmpl queue in case request is already finished */
1856         mvs_int_rx(mvi, false);
1857
1858
1859
1860         list_for_each_entry_safe(slot, slot2, &port->list, entry) {
1861                 struct sas_task *task;
1862                 slot_idx = (u32) (slot - mvi->slot_info);
1863                 task = slot->task;
1864
1865                 if (dev && task->dev != dev)
1866                         continue;
1867
1868                 mv_printk("Release slot [%x] tag[%x], task [%p]:\n",
1869                         slot_idx, slot->slot_tag, task);
1870                 MVS_CHIP_DISP->command_active(mvi, slot_idx);
1871
1872                 mvs_slot_complete(mvi, slot_idx, 1);
1873         }
1874 }
1875
1876 void mvs_release_task(struct mvs_info *mvi,
1877                       struct domain_device *dev)
1878 {
1879         int i, phyno[WIDE_PORT_MAX_PHY], num;
1880         num = mvs_find_dev_phyno(dev, phyno);
1881         for (i = 0; i < num; i++)
1882                 mvs_do_release_task(mvi, phyno[i], dev);
1883 }
1884
1885 static void mvs_phy_disconnected(struct mvs_phy *phy)
1886 {
1887         phy->phy_attached = 0;
1888         phy->att_dev_info = 0;
1889         phy->att_dev_sas_addr = 0;
1890 }
1891
1892 static void mvs_work_queue(struct work_struct *work)
1893 {
1894         struct delayed_work *dw = container_of(work, struct delayed_work, work);
1895         struct mvs_wq *mwq = container_of(dw, struct mvs_wq, work_q);
1896         struct mvs_info *mvi = mwq->mvi;
1897         unsigned long flags;
1898         u32 phy_no = (unsigned long) mwq->data;
1899         struct sas_ha_struct *sas_ha = mvi->sas;
1900         struct mvs_phy *phy = &mvi->phy[phy_no];
1901         struct asd_sas_phy *sas_phy = &phy->sas_phy;
1902
1903         spin_lock_irqsave(&mvi->lock, flags);
1904         if (mwq->handler & PHY_PLUG_EVENT) {
1905
1906                 if (phy->phy_event & PHY_PLUG_OUT) {
1907                         u32 tmp;
1908                         struct sas_identify_frame *id;
1909                         id = (struct sas_identify_frame *)phy->frame_rcvd;
1910                         tmp = MVS_CHIP_DISP->read_phy_ctl(mvi, phy_no);
1911                         phy->phy_event &= ~PHY_PLUG_OUT;
1912                         if (!(tmp & PHY_READY_MASK)) {
1913                                 sas_phy_disconnected(sas_phy);
1914                                 mvs_phy_disconnected(phy);
1915                                 sas_ha->notify_phy_event(sas_phy,
1916                                         PHYE_LOSS_OF_SIGNAL);
1917                                 mv_dprintk("phy%d Removed Device\n", phy_no);
1918                         } else {
1919                                 MVS_CHIP_DISP->detect_porttype(mvi, phy_no);
1920                                 mvs_update_phyinfo(mvi, phy_no, 1);
1921                                 mvs_bytes_dmaed(mvi, phy_no);
1922                                 mvs_port_notify_formed(sas_phy, 0);
1923                                 mv_dprintk("phy%d Attached Device\n", phy_no);
1924                         }
1925                 }
1926         } else if (mwq->handler & EXP_BRCT_CHG) {
1927                 phy->phy_event &= ~EXP_BRCT_CHG;
1928                 sas_ha->notify_port_event(sas_phy,
1929                                 PORTE_BROADCAST_RCVD);
1930                 mv_dprintk("phy%d Got Broadcast Change\n", phy_no);
1931         }
1932         list_del(&mwq->entry);
1933         spin_unlock_irqrestore(&mvi->lock, flags);
1934         kfree(mwq);
1935 }
1936
1937 static int mvs_handle_event(struct mvs_info *mvi, void *data, int handler)
1938 {
1939         struct mvs_wq *mwq;
1940         int ret = 0;
1941
1942         mwq = kmalloc(sizeof(struct mvs_wq), GFP_ATOMIC);
1943         if (mwq) {
1944                 mwq->mvi = mvi;
1945                 mwq->data = data;
1946                 mwq->handler = handler;
1947                 MV_INIT_DELAYED_WORK(&mwq->work_q, mvs_work_queue, mwq);
1948                 list_add_tail(&mwq->entry, &mvi->wq_list);
1949                 schedule_delayed_work(&mwq->work_q, HZ * 2);
1950         } else
1951                 ret = -ENOMEM;
1952
1953         return ret;
1954 }
1955
1956 static void mvs_sig_time_out(struct timer_list *t)
1957 {
1958         struct mvs_phy *phy = from_timer(phy, t, timer);
1959         struct mvs_info *mvi = phy->mvi;
1960         u8 phy_no;
1961
1962         for (phy_no = 0; phy_no < mvi->chip->n_phy; phy_no++) {
1963                 if (&mvi->phy[phy_no] == phy) {
1964                         mv_dprintk("Get signature time out, reset phy %d\n",
1965                                 phy_no+mvi->id*mvi->chip->n_phy);
1966                         MVS_CHIP_DISP->phy_reset(mvi, phy_no, MVS_HARD_RESET);
1967                 }
1968         }
1969 }
1970
1971 void mvs_int_port(struct mvs_info *mvi, int phy_no, u32 events)
1972 {
1973         u32 tmp;
1974         struct mvs_phy *phy = &mvi->phy[phy_no];
1975
1976         phy->irq_status = MVS_CHIP_DISP->read_port_irq_stat(mvi, phy_no);
1977         MVS_CHIP_DISP->write_port_irq_stat(mvi, phy_no, phy->irq_status);
1978         mv_dprintk("phy %d ctrl sts=0x%08X.\n", phy_no+mvi->id*mvi->chip->n_phy,
1979                 MVS_CHIP_DISP->read_phy_ctl(mvi, phy_no));
1980         mv_dprintk("phy %d irq sts = 0x%08X\n", phy_no+mvi->id*mvi->chip->n_phy,
1981                 phy->irq_status);
1982
1983         /*
1984         * events is port event now ,
1985         * we need check the interrupt status which belongs to per port.
1986         */
1987
1988         if (phy->irq_status & PHYEV_DCDR_ERR) {
1989                 mv_dprintk("phy %d STP decoding error.\n",
1990                 phy_no + mvi->id*mvi->chip->n_phy);
1991         }
1992
1993         if (phy->irq_status & PHYEV_POOF) {
1994                 mdelay(500);
1995                 if (!(phy->phy_event & PHY_PLUG_OUT)) {
1996                         int dev_sata = phy->phy_type & PORT_TYPE_SATA;
1997                         int ready;
1998                         mvs_do_release_task(mvi, phy_no, NULL);
1999                         phy->phy_event |= PHY_PLUG_OUT;
2000                         MVS_CHIP_DISP->clear_srs_irq(mvi, 0, 1);
2001                         mvs_handle_event(mvi,
2002                                 (void *)(unsigned long)phy_no,
2003                                 PHY_PLUG_EVENT);
2004                         ready = mvs_is_phy_ready(mvi, phy_no);
2005                         if (ready || dev_sata) {
2006                                 if (MVS_CHIP_DISP->stp_reset)
2007                                         MVS_CHIP_DISP->stp_reset(mvi,
2008                                                         phy_no);
2009                                 else
2010                                         MVS_CHIP_DISP->phy_reset(mvi,
2011                                                         phy_no, MVS_SOFT_RESET);
2012                                 return;
2013                         }
2014                 }
2015         }
2016
2017         if (phy->irq_status & PHYEV_COMWAKE) {
2018                 tmp = MVS_CHIP_DISP->read_port_irq_mask(mvi, phy_no);
2019                 MVS_CHIP_DISP->write_port_irq_mask(mvi, phy_no,
2020                                         tmp | PHYEV_SIG_FIS);
2021                 if (phy->timer.function == NULL) {
2022                         phy->timer.function = mvs_sig_time_out;
2023                         phy->timer.expires = jiffies + 5*HZ;
2024                         add_timer(&phy->timer);
2025                 }
2026         }
2027         if (phy->irq_status & (PHYEV_SIG_FIS | PHYEV_ID_DONE)) {
2028                 phy->phy_status = mvs_is_phy_ready(mvi, phy_no);
2029                 mv_dprintk("notify plug in on phy[%d]\n", phy_no);
2030                 if (phy->phy_status) {
2031                         mdelay(10);
2032                         MVS_CHIP_DISP->detect_porttype(mvi, phy_no);
2033                         if (phy->phy_type & PORT_TYPE_SATA) {
2034                                 tmp = MVS_CHIP_DISP->read_port_irq_mask(
2035                                                 mvi, phy_no);
2036                                 tmp &= ~PHYEV_SIG_FIS;
2037                                 MVS_CHIP_DISP->write_port_irq_mask(mvi,
2038                                                         phy_no, tmp);
2039                         }
2040                         mvs_update_phyinfo(mvi, phy_no, 0);
2041                         if (phy->phy_type & PORT_TYPE_SAS) {
2042                                 MVS_CHIP_DISP->phy_reset(mvi, phy_no, MVS_PHY_TUNE);
2043                                 mdelay(10);
2044                         }
2045
2046                         mvs_bytes_dmaed(mvi, phy_no);
2047                         /* whether driver is going to handle hot plug */
2048                         if (phy->phy_event & PHY_PLUG_OUT) {
2049                                 mvs_port_notify_formed(&phy->sas_phy, 0);
2050                                 phy->phy_event &= ~PHY_PLUG_OUT;
2051                         }
2052                 } else {
2053                         mv_dprintk("plugin interrupt but phy%d is gone\n",
2054                                 phy_no + mvi->id*mvi->chip->n_phy);
2055                 }
2056         } else if (phy->irq_status & PHYEV_BROAD_CH) {
2057                 mv_dprintk("phy %d broadcast change.\n",
2058                         phy_no + mvi->id*mvi->chip->n_phy);
2059                 mvs_handle_event(mvi, (void *)(unsigned long)phy_no,
2060                                 EXP_BRCT_CHG);
2061         }
2062 }
2063
2064 int mvs_int_rx(struct mvs_info *mvi, bool self_clear)
2065 {
2066         u32 rx_prod_idx, rx_desc;
2067         bool attn = false;
2068
2069         /* the first dword in the RX ring is special: it contains
2070          * a mirror of the hardware's RX producer index, so that
2071          * we don't have to stall the CPU reading that register.
2072          * The actual RX ring is offset by one dword, due to this.
2073          */
2074         rx_prod_idx = mvi->rx_cons;
2075         mvi->rx_cons = le32_to_cpu(mvi->rx[0]);
2076         if (mvi->rx_cons == 0xfff)      /* h/w hasn't touched RX ring yet */
2077                 return 0;
2078
2079         /* The CMPL_Q may come late, read from register and try again
2080         * note: if coalescing is enabled,
2081         * it will need to read from register every time for sure
2082         */
2083         if (unlikely(mvi->rx_cons == rx_prod_idx))
2084                 mvi->rx_cons = MVS_CHIP_DISP->rx_update(mvi) & RX_RING_SZ_MASK;
2085
2086         if (mvi->rx_cons == rx_prod_idx)
2087                 return 0;
2088
2089         while (mvi->rx_cons != rx_prod_idx) {
2090                 /* increment our internal RX consumer pointer */
2091                 rx_prod_idx = (rx_prod_idx + 1) & (MVS_RX_RING_SZ - 1);
2092                 rx_desc = le32_to_cpu(mvi->rx[rx_prod_idx + 1]);
2093
2094                 if (likely(rx_desc & RXQ_DONE))
2095                         mvs_slot_complete(mvi, rx_desc, 0);
2096                 if (rx_desc & RXQ_ATTN) {
2097                         attn = true;
2098                 } else if (rx_desc & RXQ_ERR) {
2099                         if (!(rx_desc & RXQ_DONE))
2100                                 mvs_slot_complete(mvi, rx_desc, 0);
2101                 } else if (rx_desc & RXQ_SLOT_RESET) {
2102                         mvs_slot_free(mvi, rx_desc);
2103                 }
2104         }
2105
2106         if (attn && self_clear)
2107                 MVS_CHIP_DISP->int_full(mvi);
2108         return 0;
2109 }
2110
2111 int mvs_gpio_write(struct sas_ha_struct *sha, u8 reg_type, u8 reg_index,
2112                         u8 reg_count, u8 *write_data)
2113 {
2114         struct mvs_prv_info *mvs_prv = sha->lldd_ha;
2115         struct mvs_info *mvi = mvs_prv->mvi[0];
2116
2117         if (MVS_CHIP_DISP->gpio_write) {
2118                 return MVS_CHIP_DISP->gpio_write(mvs_prv, reg_type,
2119                         reg_index, reg_count, write_data);
2120         }
2121
2122         return -ENOSYS;
2123 }