xref: /openbmc/linux/drivers/scsi/mvsas/mv_sas.c (revision 4dc051eb)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Marvell 88SE64xx/88SE94xx main function
4  *
5  * Copyright 2007 Red Hat, Inc.
6  * Copyright 2008 Marvell. <kewei@marvell.com>
7  * Copyright 2009-2011 Marvell. <yuxiangl@marvell.com>
8 */
9 
10 #include "mv_sas.h"
11 
mvs_find_tag(struct mvs_info * mvi,struct sas_task * task,u32 * tag)12 static int mvs_find_tag(struct mvs_info *mvi, struct sas_task *task, u32 *tag)
13 {
14 	if (task->lldd_task) {
15 		struct mvs_slot_info *slot;
16 		slot = task->lldd_task;
17 		*tag = slot->slot_tag;
18 		return 1;
19 	}
20 	return 0;
21 }
22 
mvs_tag_clear(struct mvs_info * mvi,u32 tag)23 static void mvs_tag_clear(struct mvs_info *mvi, u32 tag)
24 {
25 	void *bitmap = mvi->rsvd_tags;
26 	clear_bit(tag, bitmap);
27 }
28 
mvs_tag_free(struct mvs_info * mvi,u32 tag)29 static void mvs_tag_free(struct mvs_info *mvi, u32 tag)
30 {
31 	if (tag >= MVS_RSVD_SLOTS)
32 		return;
33 
34 	mvs_tag_clear(mvi, tag);
35 }
36 
mvs_tag_set(struct mvs_info * mvi,unsigned int tag)37 static void mvs_tag_set(struct mvs_info *mvi, unsigned int tag)
38 {
39 	void *bitmap = mvi->rsvd_tags;
40 	set_bit(tag, bitmap);
41 }
42 
mvs_tag_alloc(struct mvs_info * mvi,u32 * tag_out)43 static int mvs_tag_alloc(struct mvs_info *mvi, u32 *tag_out)
44 {
45 	unsigned int index, tag;
46 	void *bitmap = mvi->rsvd_tags;
47 
48 	index = find_first_zero_bit(bitmap, MVS_RSVD_SLOTS);
49 	tag = index;
50 	if (tag >= MVS_RSVD_SLOTS)
51 		return -SAS_QUEUE_FULL;
52 	mvs_tag_set(mvi, tag);
53 	*tag_out = tag;
54 	return 0;
55 }
56 
mvs_find_dev_mvi(struct domain_device * dev)57 static struct mvs_info *mvs_find_dev_mvi(struct domain_device *dev)
58 {
59 	unsigned long i = 0, j = 0, hi = 0;
60 	struct sas_ha_struct *sha = dev->port->ha;
61 	struct mvs_info *mvi = NULL;
62 	struct asd_sas_phy *phy;
63 
64 	while (sha->sas_port[i]) {
65 		if (sha->sas_port[i] == dev->port) {
66 			spin_lock(&sha->sas_port[i]->phy_list_lock);
67 			phy =  container_of(sha->sas_port[i]->phy_list.next,
68 				struct asd_sas_phy, port_phy_el);
69 			spin_unlock(&sha->sas_port[i]->phy_list_lock);
70 			j = 0;
71 			while (sha->sas_phy[j]) {
72 				if (sha->sas_phy[j] == phy)
73 					break;
74 				j++;
75 			}
76 			break;
77 		}
78 		i++;
79 	}
80 	hi = j/((struct mvs_prv_info *)sha->lldd_ha)->n_phy;
81 	mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[hi];
82 
83 	return mvi;
84 
85 }
86 
mvs_find_dev_phyno(struct domain_device * dev,int * phyno)87 static int mvs_find_dev_phyno(struct domain_device *dev, int *phyno)
88 {
89 	unsigned long i = 0, j = 0, n = 0, num = 0;
90 	struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
91 	struct mvs_info *mvi = mvi_dev->mvi_info;
92 	struct sas_ha_struct *sha = dev->port->ha;
93 
94 	while (sha->sas_port[i]) {
95 		if (sha->sas_port[i] == dev->port) {
96 			struct asd_sas_phy *phy;
97 
98 			spin_lock(&sha->sas_port[i]->phy_list_lock);
99 			list_for_each_entry(phy,
100 				&sha->sas_port[i]->phy_list, port_phy_el) {
101 				j = 0;
102 				while (sha->sas_phy[j]) {
103 					if (sha->sas_phy[j] == phy)
104 						break;
105 					j++;
106 				}
107 				phyno[n] = (j >= mvi->chip->n_phy) ?
108 					(j - mvi->chip->n_phy) : j;
109 				num++;
110 				n++;
111 			}
112 			spin_unlock(&sha->sas_port[i]->phy_list_lock);
113 			break;
114 		}
115 		i++;
116 	}
117 	return num;
118 }
119 
mvs_find_dev_by_reg_set(struct mvs_info * mvi,u8 reg_set)120 struct mvs_device *mvs_find_dev_by_reg_set(struct mvs_info *mvi,
121 						u8 reg_set)
122 {
123 	u32 dev_no;
124 	for (dev_no = 0; dev_no < MVS_MAX_DEVICES; dev_no++) {
125 		if (mvi->devices[dev_no].taskfileset == MVS_ID_NOT_MAPPED)
126 			continue;
127 
128 		if (mvi->devices[dev_no].taskfileset == reg_set)
129 			return &mvi->devices[dev_no];
130 	}
131 	return NULL;
132 }
133 
mvs_free_reg_set(struct mvs_info * mvi,struct mvs_device * dev)134 static inline void mvs_free_reg_set(struct mvs_info *mvi,
135 				struct mvs_device *dev)
136 {
137 	if (!dev) {
138 		mv_printk("device has been free.\n");
139 		return;
140 	}
141 	if (dev->taskfileset == MVS_ID_NOT_MAPPED)
142 		return;
143 	MVS_CHIP_DISP->free_reg_set(mvi, &dev->taskfileset);
144 }
145 
mvs_assign_reg_set(struct mvs_info * mvi,struct mvs_device * dev)146 static inline u8 mvs_assign_reg_set(struct mvs_info *mvi,
147 				struct mvs_device *dev)
148 {
149 	if (dev->taskfileset != MVS_ID_NOT_MAPPED)
150 		return 0;
151 	return MVS_CHIP_DISP->assign_reg_set(mvi, &dev->taskfileset);
152 }
153 
mvs_phys_reset(struct mvs_info * mvi,u32 phy_mask,int hard)154 void mvs_phys_reset(struct mvs_info *mvi, u32 phy_mask, int hard)
155 {
156 	u32 no;
157 	for_each_phy(phy_mask, phy_mask, no) {
158 		if (!(phy_mask & 1))
159 			continue;
160 		MVS_CHIP_DISP->phy_reset(mvi, no, hard);
161 	}
162 }
163 
mvs_phy_control(struct asd_sas_phy * sas_phy,enum phy_func func,void * funcdata)164 int mvs_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func,
165 			void *funcdata)
166 {
167 	int rc = 0, phy_id = sas_phy->id;
168 	u32 tmp, i = 0, hi;
169 	struct sas_ha_struct *sha = sas_phy->ha;
170 	struct mvs_info *mvi = NULL;
171 
172 	while (sha->sas_phy[i]) {
173 		if (sha->sas_phy[i] == sas_phy)
174 			break;
175 		i++;
176 	}
177 	hi = i/((struct mvs_prv_info *)sha->lldd_ha)->n_phy;
178 	mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[hi];
179 
180 	switch (func) {
181 	case PHY_FUNC_SET_LINK_RATE:
182 		MVS_CHIP_DISP->phy_set_link_rate(mvi, phy_id, funcdata);
183 		break;
184 
185 	case PHY_FUNC_HARD_RESET:
186 		tmp = MVS_CHIP_DISP->read_phy_ctl(mvi, phy_id);
187 		if (tmp & PHY_RST_HARD)
188 			break;
189 		MVS_CHIP_DISP->phy_reset(mvi, phy_id, MVS_HARD_RESET);
190 		break;
191 
192 	case PHY_FUNC_LINK_RESET:
193 		MVS_CHIP_DISP->phy_enable(mvi, phy_id);
194 		MVS_CHIP_DISP->phy_reset(mvi, phy_id, MVS_SOFT_RESET);
195 		break;
196 
197 	case PHY_FUNC_DISABLE:
198 		MVS_CHIP_DISP->phy_disable(mvi, phy_id);
199 		break;
200 	case PHY_FUNC_RELEASE_SPINUP_HOLD:
201 	default:
202 		rc = -ENOSYS;
203 	}
204 	msleep(200);
205 	return rc;
206 }
207 
mvs_set_sas_addr(struct mvs_info * mvi,int port_id,u32 off_lo,u32 off_hi,u64 sas_addr)208 void mvs_set_sas_addr(struct mvs_info *mvi, int port_id, u32 off_lo,
209 		      u32 off_hi, u64 sas_addr)
210 {
211 	u32 lo = (u32)sas_addr;
212 	u32 hi = (u32)(sas_addr>>32);
213 
214 	MVS_CHIP_DISP->write_port_cfg_addr(mvi, port_id, off_lo);
215 	MVS_CHIP_DISP->write_port_cfg_data(mvi, port_id, lo);
216 	MVS_CHIP_DISP->write_port_cfg_addr(mvi, port_id, off_hi);
217 	MVS_CHIP_DISP->write_port_cfg_data(mvi, port_id, hi);
218 }
219 
mvs_bytes_dmaed(struct mvs_info * mvi,int i,gfp_t gfp_flags)220 static void mvs_bytes_dmaed(struct mvs_info *mvi, int i, gfp_t gfp_flags)
221 {
222 	struct mvs_phy *phy = &mvi->phy[i];
223 	struct asd_sas_phy *sas_phy = &phy->sas_phy;
224 
225 	if (!phy->phy_attached)
226 		return;
227 
228 	if (!(phy->att_dev_info & PORT_DEV_TRGT_MASK)
229 		&& phy->phy_type & PORT_TYPE_SAS) {
230 		return;
231 	}
232 
233 	sas_notify_phy_event(sas_phy, PHYE_OOB_DONE, gfp_flags);
234 
235 	if (sas_phy->phy) {
236 		struct sas_phy *sphy = sas_phy->phy;
237 
238 		sphy->negotiated_linkrate = sas_phy->linkrate;
239 		sphy->minimum_linkrate = phy->minimum_linkrate;
240 		sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
241 		sphy->maximum_linkrate = phy->maximum_linkrate;
242 		sphy->maximum_linkrate_hw = MVS_CHIP_DISP->phy_max_link_rate();
243 	}
244 
245 	if (phy->phy_type & PORT_TYPE_SAS) {
246 		struct sas_identify_frame *id;
247 
248 		id = (struct sas_identify_frame *)phy->frame_rcvd;
249 		id->dev_type = phy->identify.device_type;
250 		id->initiator_bits = SAS_PROTOCOL_ALL;
251 		id->target_bits = phy->identify.target_port_protocols;
252 
253 		/* direct attached SAS device */
254 		if (phy->att_dev_info & PORT_SSP_TRGT_MASK) {
255 			MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_PHY_STAT);
256 			MVS_CHIP_DISP->write_port_cfg_data(mvi, i, 0x00);
257 		}
258 	} else if (phy->phy_type & PORT_TYPE_SATA) {
259 		/*Nothing*/
260 	}
261 	mv_dprintk("phy %d byte dmaded.\n", i + mvi->id * mvi->chip->n_phy);
262 
263 	sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
264 
265 	sas_notify_port_event(sas_phy, PORTE_BYTES_DMAED, gfp_flags);
266 }
267 
mvs_scan_start(struct Scsi_Host * shost)268 void mvs_scan_start(struct Scsi_Host *shost)
269 {
270 	int i, j;
271 	unsigned short core_nr;
272 	struct mvs_info *mvi;
273 	struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
274 	struct mvs_prv_info *mvs_prv = sha->lldd_ha;
275 
276 	core_nr = ((struct mvs_prv_info *)sha->lldd_ha)->n_host;
277 
278 	for (j = 0; j < core_nr; j++) {
279 		mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[j];
280 		for (i = 0; i < mvi->chip->n_phy; ++i)
281 			mvs_bytes_dmaed(mvi, i, GFP_KERNEL);
282 	}
283 	mvs_prv->scan_finished = 1;
284 }
285 
mvs_scan_finished(struct Scsi_Host * shost,unsigned long time)286 int mvs_scan_finished(struct Scsi_Host *shost, unsigned long time)
287 {
288 	struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
289 	struct mvs_prv_info *mvs_prv = sha->lldd_ha;
290 
291 	if (mvs_prv->scan_finished == 0)
292 		return 0;
293 
294 	sas_drain_work(sha);
295 	return 1;
296 }
297 
mvs_task_prep_smp(struct mvs_info * mvi,struct mvs_task_exec_info * tei)298 static int mvs_task_prep_smp(struct mvs_info *mvi,
299 			     struct mvs_task_exec_info *tei)
300 {
301 	int elem, rc, i;
302 	struct sas_ha_struct *sha = mvi->sas;
303 	struct sas_task *task = tei->task;
304 	struct mvs_cmd_hdr *hdr = tei->hdr;
305 	struct domain_device *dev = task->dev;
306 	struct asd_sas_port *sas_port = dev->port;
307 	struct sas_phy *sphy = dev->phy;
308 	struct asd_sas_phy *sas_phy = sha->sas_phy[sphy->number];
309 	struct scatterlist *sg_req, *sg_resp;
310 	u32 req_len, resp_len, tag = tei->tag;
311 	void *buf_tmp;
312 	u8 *buf_oaf;
313 	dma_addr_t buf_tmp_dma;
314 	void *buf_prd;
315 	struct mvs_slot_info *slot = &mvi->slot_info[tag];
316 	u32 flags = (tei->n_elem << MCH_PRD_LEN_SHIFT);
317 
318 	/*
319 	 * DMA-map SMP request, response buffers
320 	 */
321 	sg_req = &task->smp_task.smp_req;
322 	elem = dma_map_sg(mvi->dev, sg_req, 1, DMA_TO_DEVICE);
323 	if (!elem)
324 		return -ENOMEM;
325 	req_len = sg_dma_len(sg_req);
326 
327 	sg_resp = &task->smp_task.smp_resp;
328 	elem = dma_map_sg(mvi->dev, sg_resp, 1, DMA_FROM_DEVICE);
329 	if (!elem) {
330 		rc = -ENOMEM;
331 		goto err_out;
332 	}
333 	resp_len = SB_RFB_MAX;
334 
335 	/* must be in dwords */
336 	if ((req_len & 0x3) || (resp_len & 0x3)) {
337 		rc = -EINVAL;
338 		goto err_out_2;
339 	}
340 
341 	/*
342 	 * arrange MVS_SLOT_BUF_SZ-sized DMA buffer according to our needs
343 	 */
344 
345 	/* region 1: command table area (MVS_SSP_CMD_SZ bytes) ***** */
346 	buf_tmp = slot->buf;
347 	buf_tmp_dma = slot->buf_dma;
348 
349 	hdr->cmd_tbl = cpu_to_le64(sg_dma_address(sg_req));
350 
351 	/* region 2: open address frame area (MVS_OAF_SZ bytes) ********* */
352 	buf_oaf = buf_tmp;
353 	hdr->open_frame = cpu_to_le64(buf_tmp_dma);
354 
355 	buf_tmp += MVS_OAF_SZ;
356 	buf_tmp_dma += MVS_OAF_SZ;
357 
358 	/* region 3: PRD table *********************************** */
359 	buf_prd = buf_tmp;
360 	if (tei->n_elem)
361 		hdr->prd_tbl = cpu_to_le64(buf_tmp_dma);
362 	else
363 		hdr->prd_tbl = 0;
364 
365 	i = MVS_CHIP_DISP->prd_size() * tei->n_elem;
366 	buf_tmp += i;
367 	buf_tmp_dma += i;
368 
369 	/* region 4: status buffer (larger the PRD, smaller this buf) ****** */
370 	slot->response = buf_tmp;
371 	hdr->status_buf = cpu_to_le64(buf_tmp_dma);
372 	if (mvi->flags & MVF_FLAG_SOC)
373 		hdr->reserved[0] = 0;
374 
375 	/*
376 	 * Fill in TX ring and command slot header
377 	 */
378 	slot->tx = mvi->tx_prod;
379 	mvi->tx[mvi->tx_prod] = cpu_to_le32((TXQ_CMD_SMP << TXQ_CMD_SHIFT) |
380 					TXQ_MODE_I | tag |
381 					(MVS_PHY_ID << TXQ_PHY_SHIFT));
382 
383 	hdr->flags |= flags;
384 	hdr->lens = cpu_to_le32(((resp_len / 4) << 16) | ((req_len - 4) / 4));
385 	hdr->tags = cpu_to_le32(tag);
386 	hdr->data_len = 0;
387 
388 	/* generate open address frame hdr (first 12 bytes) */
389 	/* initiator, SMP, ftype 1h */
390 	buf_oaf[0] = (1 << 7) | (PROTOCOL_SMP << 4) | 0x01;
391 	buf_oaf[1] = min(sas_port->linkrate, dev->linkrate) & 0xf;
392 	*(u16 *)(buf_oaf + 2) = 0xFFFF;		/* SAS SPEC */
393 	memcpy(buf_oaf + 4, dev->sas_addr, SAS_ADDR_SIZE);
394 
395 	/* fill in PRD (scatter/gather) table, if any */
396 	MVS_CHIP_DISP->make_prd(task->scatter, tei->n_elem, buf_prd);
397 
398 	return 0;
399 
400 err_out_2:
401 	dma_unmap_sg(mvi->dev, &tei->task->smp_task.smp_resp, 1,
402 		     DMA_FROM_DEVICE);
403 err_out:
404 	dma_unmap_sg(mvi->dev, &tei->task->smp_task.smp_req, 1,
405 		     DMA_TO_DEVICE);
406 	return rc;
407 }
408 
mvs_get_ncq_tag(struct sas_task * task,u32 * tag)409 static u32 mvs_get_ncq_tag(struct sas_task *task, u32 *tag)
410 {
411 	struct ata_queued_cmd *qc = task->uldd_task;
412 
413 	if (qc) {
414 		if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
415 		    qc->tf.command == ATA_CMD_FPDMA_READ ||
416 		    qc->tf.command == ATA_CMD_FPDMA_RECV ||
417 		    qc->tf.command == ATA_CMD_FPDMA_SEND ||
418 		    qc->tf.command == ATA_CMD_NCQ_NON_DATA) {
419 			*tag = qc->tag;
420 			return 1;
421 		}
422 	}
423 
424 	return 0;
425 }
426 
mvs_task_prep_ata(struct mvs_info * mvi,struct mvs_task_exec_info * tei)427 static int mvs_task_prep_ata(struct mvs_info *mvi,
428 			     struct mvs_task_exec_info *tei)
429 {
430 	struct sas_task *task = tei->task;
431 	struct domain_device *dev = task->dev;
432 	struct mvs_device *mvi_dev = dev->lldd_dev;
433 	struct mvs_cmd_hdr *hdr = tei->hdr;
434 	struct asd_sas_port *sas_port = dev->port;
435 	struct mvs_slot_info *slot;
436 	void *buf_prd;
437 	u32 tag = tei->tag, hdr_tag;
438 	u32 flags, del_q;
439 	void *buf_tmp;
440 	u8 *buf_cmd, *buf_oaf;
441 	dma_addr_t buf_tmp_dma;
442 	u32 i, req_len, resp_len;
443 	const u32 max_resp_len = SB_RFB_MAX;
444 
445 	if (mvs_assign_reg_set(mvi, mvi_dev) == MVS_ID_NOT_MAPPED) {
446 		mv_dprintk("Have not enough regiset for dev %d.\n",
447 			mvi_dev->device_id);
448 		return -EBUSY;
449 	}
450 	slot = &mvi->slot_info[tag];
451 	slot->tx = mvi->tx_prod;
452 	del_q = TXQ_MODE_I | tag |
453 		(TXQ_CMD_STP << TXQ_CMD_SHIFT) |
454 		((sas_port->phy_mask & TXQ_PHY_MASK) << TXQ_PHY_SHIFT) |
455 		(mvi_dev->taskfileset << TXQ_SRS_SHIFT);
456 	mvi->tx[mvi->tx_prod] = cpu_to_le32(del_q);
457 
458 	if (task->data_dir == DMA_FROM_DEVICE)
459 		flags = (MVS_CHIP_DISP->prd_count() << MCH_PRD_LEN_SHIFT);
460 	else
461 		flags = (tei->n_elem << MCH_PRD_LEN_SHIFT);
462 
463 	if (task->ata_task.use_ncq)
464 		flags |= MCH_FPDMA;
465 	if (dev->sata_dev.class == ATA_DEV_ATAPI) {
466 		if (task->ata_task.fis.command != ATA_CMD_ID_ATAPI)
467 			flags |= MCH_ATAPI;
468 	}
469 
470 	hdr->flags = cpu_to_le32(flags);
471 
472 	if (task->ata_task.use_ncq && mvs_get_ncq_tag(task, &hdr_tag))
473 		task->ata_task.fis.sector_count |= (u8) (hdr_tag << 3);
474 	else
475 		hdr_tag = tag;
476 
477 	hdr->tags = cpu_to_le32(hdr_tag);
478 
479 	hdr->data_len = cpu_to_le32(task->total_xfer_len);
480 
481 	/*
482 	 * arrange MVS_SLOT_BUF_SZ-sized DMA buffer according to our needs
483 	 */
484 
485 	/* region 1: command table area (MVS_ATA_CMD_SZ bytes) ************** */
486 	buf_cmd = buf_tmp = slot->buf;
487 	buf_tmp_dma = slot->buf_dma;
488 
489 	hdr->cmd_tbl = cpu_to_le64(buf_tmp_dma);
490 
491 	buf_tmp += MVS_ATA_CMD_SZ;
492 	buf_tmp_dma += MVS_ATA_CMD_SZ;
493 
494 	/* region 2: open address frame area (MVS_OAF_SZ bytes) ********* */
495 	/* used for STP.  unused for SATA? */
496 	buf_oaf = buf_tmp;
497 	hdr->open_frame = cpu_to_le64(buf_tmp_dma);
498 
499 	buf_tmp += MVS_OAF_SZ;
500 	buf_tmp_dma += MVS_OAF_SZ;
501 
502 	/* region 3: PRD table ********************************************* */
503 	buf_prd = buf_tmp;
504 
505 	if (tei->n_elem)
506 		hdr->prd_tbl = cpu_to_le64(buf_tmp_dma);
507 	else
508 		hdr->prd_tbl = 0;
509 	i = MVS_CHIP_DISP->prd_size() * MVS_CHIP_DISP->prd_count();
510 
511 	buf_tmp += i;
512 	buf_tmp_dma += i;
513 
514 	/* region 4: status buffer (larger the PRD, smaller this buf) ****** */
515 	slot->response = buf_tmp;
516 	hdr->status_buf = cpu_to_le64(buf_tmp_dma);
517 	if (mvi->flags & MVF_FLAG_SOC)
518 		hdr->reserved[0] = 0;
519 
520 	req_len = sizeof(struct host_to_dev_fis);
521 	resp_len = MVS_SLOT_BUF_SZ - MVS_ATA_CMD_SZ -
522 	    sizeof(struct mvs_err_info) - i;
523 
524 	/* request, response lengths */
525 	resp_len = min(resp_len, max_resp_len);
526 	hdr->lens = cpu_to_le32(((resp_len / 4) << 16) | (req_len / 4));
527 
528 	if (likely(!task->ata_task.device_control_reg_update))
529 		task->ata_task.fis.flags |= 0x80; /* C=1: update ATA cmd reg */
530 	/* fill in command FIS and ATAPI CDB */
531 	memcpy(buf_cmd, &task->ata_task.fis, sizeof(struct host_to_dev_fis));
532 	if (dev->sata_dev.class == ATA_DEV_ATAPI)
533 		memcpy(buf_cmd + STP_ATAPI_CMD,
534 			task->ata_task.atapi_packet, 16);
535 
536 	/* generate open address frame hdr (first 12 bytes) */
537 	/* initiator, STP, ftype 1h */
538 	buf_oaf[0] = (1 << 7) | (PROTOCOL_STP << 4) | 0x1;
539 	buf_oaf[1] = min(sas_port->linkrate, dev->linkrate) & 0xf;
540 	*(u16 *)(buf_oaf + 2) = cpu_to_be16(mvi_dev->device_id + 1);
541 	memcpy(buf_oaf + 4, dev->sas_addr, SAS_ADDR_SIZE);
542 
543 	/* fill in PRD (scatter/gather) table, if any */
544 	MVS_CHIP_DISP->make_prd(task->scatter, tei->n_elem, buf_prd);
545 
546 	if (task->data_dir == DMA_FROM_DEVICE)
547 		MVS_CHIP_DISP->dma_fix(mvi, sas_port->phy_mask,
548 				TRASH_BUCKET_SIZE, tei->n_elem, buf_prd);
549 
550 	return 0;
551 }
552 
mvs_task_prep_ssp(struct mvs_info * mvi,struct mvs_task_exec_info * tei,int is_tmf,struct sas_tmf_task * tmf)553 static int mvs_task_prep_ssp(struct mvs_info *mvi,
554 			     struct mvs_task_exec_info *tei, int is_tmf,
555 			     struct sas_tmf_task *tmf)
556 {
557 	struct sas_task *task = tei->task;
558 	struct mvs_cmd_hdr *hdr = tei->hdr;
559 	struct mvs_port *port = tei->port;
560 	struct domain_device *dev = task->dev;
561 	struct mvs_device *mvi_dev = dev->lldd_dev;
562 	struct asd_sas_port *sas_port = dev->port;
563 	struct mvs_slot_info *slot;
564 	void *buf_prd;
565 	struct ssp_frame_hdr *ssp_hdr;
566 	void *buf_tmp;
567 	u8 *buf_cmd, *buf_oaf;
568 	dma_addr_t buf_tmp_dma;
569 	u32 flags;
570 	u32 resp_len, req_len, i, tag = tei->tag;
571 	const u32 max_resp_len = SB_RFB_MAX;
572 	u32 phy_mask;
573 
574 	slot = &mvi->slot_info[tag];
575 
576 	phy_mask = ((port->wide_port_phymap) ? port->wide_port_phymap :
577 		sas_port->phy_mask) & TXQ_PHY_MASK;
578 
579 	slot->tx = mvi->tx_prod;
580 	mvi->tx[mvi->tx_prod] = cpu_to_le32(TXQ_MODE_I | tag |
581 				(TXQ_CMD_SSP << TXQ_CMD_SHIFT) |
582 				(phy_mask << TXQ_PHY_SHIFT));
583 
584 	flags = MCH_RETRY;
585 	if (is_tmf)
586 		flags |= (MCH_SSP_FR_TASK << MCH_SSP_FR_TYPE_SHIFT);
587 	else
588 		flags |= (MCH_SSP_FR_CMD << MCH_SSP_FR_TYPE_SHIFT);
589 
590 	hdr->flags = cpu_to_le32(flags | (tei->n_elem << MCH_PRD_LEN_SHIFT));
591 	hdr->tags = cpu_to_le32(tag);
592 	hdr->data_len = cpu_to_le32(task->total_xfer_len);
593 
594 	/*
595 	 * arrange MVS_SLOT_BUF_SZ-sized DMA buffer according to our needs
596 	 */
597 
598 	/* region 1: command table area (MVS_SSP_CMD_SZ bytes) ************** */
599 	buf_cmd = buf_tmp = slot->buf;
600 	buf_tmp_dma = slot->buf_dma;
601 
602 	hdr->cmd_tbl = cpu_to_le64(buf_tmp_dma);
603 
604 	buf_tmp += MVS_SSP_CMD_SZ;
605 	buf_tmp_dma += MVS_SSP_CMD_SZ;
606 
607 	/* region 2: open address frame area (MVS_OAF_SZ bytes) ********* */
608 	buf_oaf = buf_tmp;
609 	hdr->open_frame = cpu_to_le64(buf_tmp_dma);
610 
611 	buf_tmp += MVS_OAF_SZ;
612 	buf_tmp_dma += MVS_OAF_SZ;
613 
614 	/* region 3: PRD table ********************************************* */
615 	buf_prd = buf_tmp;
616 	if (tei->n_elem)
617 		hdr->prd_tbl = cpu_to_le64(buf_tmp_dma);
618 	else
619 		hdr->prd_tbl = 0;
620 
621 	i = MVS_CHIP_DISP->prd_size() * tei->n_elem;
622 	buf_tmp += i;
623 	buf_tmp_dma += i;
624 
625 	/* region 4: status buffer (larger the PRD, smaller this buf) ****** */
626 	slot->response = buf_tmp;
627 	hdr->status_buf = cpu_to_le64(buf_tmp_dma);
628 	if (mvi->flags & MVF_FLAG_SOC)
629 		hdr->reserved[0] = 0;
630 
631 	resp_len = MVS_SLOT_BUF_SZ - MVS_SSP_CMD_SZ - MVS_OAF_SZ -
632 	    sizeof(struct mvs_err_info) - i;
633 	resp_len = min(resp_len, max_resp_len);
634 
635 	req_len = sizeof(struct ssp_frame_hdr) + 28;
636 
637 	/* request, response lengths */
638 	hdr->lens = cpu_to_le32(((resp_len / 4) << 16) | (req_len / 4));
639 
640 	/* generate open address frame hdr (first 12 bytes) */
641 	/* initiator, SSP, ftype 1h */
642 	buf_oaf[0] = (1 << 7) | (PROTOCOL_SSP << 4) | 0x1;
643 	buf_oaf[1] = min(sas_port->linkrate, dev->linkrate) & 0xf;
644 	*(u16 *)(buf_oaf + 2) = cpu_to_be16(mvi_dev->device_id + 1);
645 	memcpy(buf_oaf + 4, dev->sas_addr, SAS_ADDR_SIZE);
646 
647 	/* fill in SSP frame header (Command Table.SSP frame header) */
648 	ssp_hdr = (struct ssp_frame_hdr *)buf_cmd;
649 
650 	if (is_tmf)
651 		ssp_hdr->frame_type = SSP_TASK;
652 	else
653 		ssp_hdr->frame_type = SSP_COMMAND;
654 
655 	memcpy(ssp_hdr->hashed_dest_addr, dev->hashed_sas_addr,
656 	       HASHED_SAS_ADDR_SIZE);
657 	memcpy(ssp_hdr->hashed_src_addr,
658 	       dev->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
659 	ssp_hdr->tag = cpu_to_be16(tag);
660 
661 	/* fill in IU for TASK and Command Frame */
662 	buf_cmd += sizeof(*ssp_hdr);
663 	memcpy(buf_cmd, &task->ssp_task.LUN, 8);
664 
665 	if (ssp_hdr->frame_type != SSP_TASK) {
666 		buf_cmd[9] = task->ssp_task.task_attr;
667 		memcpy(buf_cmd + 12, task->ssp_task.cmd->cmnd,
668 		       task->ssp_task.cmd->cmd_len);
669 	} else{
670 		buf_cmd[10] = tmf->tmf;
671 		switch (tmf->tmf) {
672 		case TMF_ABORT_TASK:
673 		case TMF_QUERY_TASK:
674 			buf_cmd[12] =
675 				(tmf->tag_of_task_to_be_managed >> 8) & 0xff;
676 			buf_cmd[13] =
677 				tmf->tag_of_task_to_be_managed & 0xff;
678 			break;
679 		default:
680 			break;
681 		}
682 	}
683 	/* fill in PRD (scatter/gather) table, if any */
684 	MVS_CHIP_DISP->make_prd(task->scatter, tei->n_elem, buf_prd);
685 	return 0;
686 }
687 
688 #define	DEV_IS_GONE(mvi_dev)	((!mvi_dev || (mvi_dev->dev_type == SAS_PHY_UNUSED)))
mvs_task_prep(struct sas_task * task,struct mvs_info * mvi,int is_tmf,struct sas_tmf_task * tmf,int * pass)689 static int mvs_task_prep(struct sas_task *task, struct mvs_info *mvi, int is_tmf,
690 				struct sas_tmf_task *tmf, int *pass)
691 {
692 	struct domain_device *dev = task->dev;
693 	struct mvs_device *mvi_dev = dev->lldd_dev;
694 	struct mvs_task_exec_info tei;
695 	struct mvs_slot_info *slot;
696 	u32 tag = 0xdeadbeef, n_elem = 0;
697 	struct request *rq;
698 	int rc = 0;
699 
700 	if (!dev->port) {
701 		struct task_status_struct *tsm = &task->task_status;
702 
703 		tsm->resp = SAS_TASK_UNDELIVERED;
704 		tsm->stat = SAS_PHY_DOWN;
705 		/*
706 		 * libsas will use dev->port, should
707 		 * not call task_done for sata
708 		 */
709 		if (dev->dev_type != SAS_SATA_DEV)
710 			task->task_done(task);
711 		return rc;
712 	}
713 
714 	if (DEV_IS_GONE(mvi_dev)) {
715 		if (mvi_dev)
716 			mv_dprintk("device %d not ready.\n",
717 				mvi_dev->device_id);
718 		else
719 			mv_dprintk("device %016llx not ready.\n",
720 				SAS_ADDR(dev->sas_addr));
721 
722 		rc = SAS_PHY_DOWN;
723 		return rc;
724 	}
725 	tei.port = dev->port->lldd_port;
726 	if (tei.port && !tei.port->port_attached && !tmf) {
727 		if (sas_protocol_ata(task->task_proto)) {
728 			struct task_status_struct *ts = &task->task_status;
729 			mv_dprintk("SATA/STP port %d does not attach"
730 					"device.\n", dev->port->id);
731 			ts->resp = SAS_TASK_COMPLETE;
732 			ts->stat = SAS_PHY_DOWN;
733 
734 			task->task_done(task);
735 
736 		} else {
737 			struct task_status_struct *ts = &task->task_status;
738 			mv_dprintk("SAS port %d does not attach"
739 				"device.\n", dev->port->id);
740 			ts->resp = SAS_TASK_UNDELIVERED;
741 			ts->stat = SAS_PHY_DOWN;
742 			task->task_done(task);
743 		}
744 		return rc;
745 	}
746 
747 	if (!sas_protocol_ata(task->task_proto)) {
748 		if (task->num_scatter) {
749 			n_elem = dma_map_sg(mvi->dev,
750 					    task->scatter,
751 					    task->num_scatter,
752 					    task->data_dir);
753 			if (!n_elem) {
754 				rc = -ENOMEM;
755 				goto prep_out;
756 			}
757 		}
758 	} else {
759 		n_elem = task->num_scatter;
760 	}
761 
762 	rq = sas_task_find_rq(task);
763 	if (rq) {
764 		tag = rq->tag + MVS_RSVD_SLOTS;
765 	} else {
766 		rc = mvs_tag_alloc(mvi, &tag);
767 		if (rc)
768 			goto err_out;
769 	}
770 
771 	slot = &mvi->slot_info[tag];
772 
773 	task->lldd_task = NULL;
774 	slot->n_elem = n_elem;
775 	slot->slot_tag = tag;
776 
777 	slot->buf = dma_pool_zalloc(mvi->dma_pool, GFP_ATOMIC, &slot->buf_dma);
778 	if (!slot->buf) {
779 		rc = -ENOMEM;
780 		goto err_out_tag;
781 	}
782 
783 	tei.task = task;
784 	tei.hdr = &mvi->slot[tag];
785 	tei.tag = tag;
786 	tei.n_elem = n_elem;
787 	switch (task->task_proto) {
788 	case SAS_PROTOCOL_SMP:
789 		rc = mvs_task_prep_smp(mvi, &tei);
790 		break;
791 	case SAS_PROTOCOL_SSP:
792 		rc = mvs_task_prep_ssp(mvi, &tei, is_tmf, tmf);
793 		break;
794 	case SAS_PROTOCOL_SATA:
795 	case SAS_PROTOCOL_STP:
796 	case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
797 		rc = mvs_task_prep_ata(mvi, &tei);
798 		break;
799 	default:
800 		dev_printk(KERN_ERR, mvi->dev,
801 			"unknown sas_task proto: 0x%x\n",
802 			task->task_proto);
803 		rc = -EINVAL;
804 		break;
805 	}
806 
807 	if (rc) {
808 		mv_dprintk("rc is %x\n", rc);
809 		goto err_out_slot_buf;
810 	}
811 	slot->task = task;
812 	slot->port = tei.port;
813 	task->lldd_task = slot;
814 	list_add_tail(&slot->entry, &tei.port->list);
815 
816 	mvi_dev->running_req++;
817 	++(*pass);
818 	mvi->tx_prod = (mvi->tx_prod + 1) & (MVS_CHIP_SLOT_SZ - 1);
819 
820 	return rc;
821 
822 err_out_slot_buf:
823 	dma_pool_free(mvi->dma_pool, slot->buf, slot->buf_dma);
824 err_out_tag:
825 	mvs_tag_free(mvi, tag);
826 err_out:
827 
828 	dev_printk(KERN_ERR, mvi->dev, "mvsas prep failed[%d]!\n", rc);
829 	if (!sas_protocol_ata(task->task_proto))
830 		if (n_elem)
831 			dma_unmap_sg(mvi->dev, task->scatter, n_elem,
832 				     task->data_dir);
833 prep_out:
834 	return rc;
835 }
836 
mvs_queue_command(struct sas_task * task,gfp_t gfp_flags)837 int mvs_queue_command(struct sas_task *task, gfp_t gfp_flags)
838 {
839 	struct mvs_info *mvi = NULL;
840 	u32 rc = 0;
841 	u32 pass = 0;
842 	unsigned long flags = 0;
843 	struct sas_tmf_task *tmf = task->tmf;
844 	int is_tmf = !!task->tmf;
845 
846 	mvi = ((struct mvs_device *)task->dev->lldd_dev)->mvi_info;
847 
848 	spin_lock_irqsave(&mvi->lock, flags);
849 	rc = mvs_task_prep(task, mvi, is_tmf, tmf, &pass);
850 	if (rc)
851 		dev_printk(KERN_ERR, mvi->dev, "mvsas exec failed[%d]!\n", rc);
852 
853 	if (likely(pass))
854 			MVS_CHIP_DISP->start_delivery(mvi, (mvi->tx_prod - 1) &
855 				(MVS_CHIP_SLOT_SZ - 1));
856 	spin_unlock_irqrestore(&mvi->lock, flags);
857 
858 	return rc;
859 }
860 
mvs_slot_free(struct mvs_info * mvi,u32 rx_desc)861 static void mvs_slot_free(struct mvs_info *mvi, u32 rx_desc)
862 {
863 	u32 slot_idx = rx_desc & RXQ_SLOT_MASK;
864 	mvs_tag_free(mvi, slot_idx);
865 }
866 
mvs_slot_task_free(struct mvs_info * mvi,struct sas_task * task,struct mvs_slot_info * slot,u32 slot_idx)867 static void mvs_slot_task_free(struct mvs_info *mvi, struct sas_task *task,
868 			  struct mvs_slot_info *slot, u32 slot_idx)
869 {
870 	if (!slot)
871 		return;
872 	if (!slot->task)
873 		return;
874 	if (!sas_protocol_ata(task->task_proto))
875 		if (slot->n_elem)
876 			dma_unmap_sg(mvi->dev, task->scatter,
877 				     slot->n_elem, task->data_dir);
878 
879 	switch (task->task_proto) {
880 	case SAS_PROTOCOL_SMP:
881 		dma_unmap_sg(mvi->dev, &task->smp_task.smp_resp, 1,
882 			     DMA_FROM_DEVICE);
883 		dma_unmap_sg(mvi->dev, &task->smp_task.smp_req, 1,
884 			     DMA_TO_DEVICE);
885 		break;
886 
887 	case SAS_PROTOCOL_SATA:
888 	case SAS_PROTOCOL_STP:
889 	case SAS_PROTOCOL_SSP:
890 	default:
891 		/* do nothing */
892 		break;
893 	}
894 
895 	if (slot->buf) {
896 		dma_pool_free(mvi->dma_pool, slot->buf, slot->buf_dma);
897 		slot->buf = NULL;
898 	}
899 	list_del_init(&slot->entry);
900 	task->lldd_task = NULL;
901 	slot->task = NULL;
902 	slot->port = NULL;
903 	slot->slot_tag = 0xFFFFFFFF;
904 	mvs_slot_free(mvi, slot_idx);
905 }
906 
mvs_update_wideport(struct mvs_info * mvi,int phy_no)907 static void mvs_update_wideport(struct mvs_info *mvi, int phy_no)
908 {
909 	struct mvs_phy *phy = &mvi->phy[phy_no];
910 	struct mvs_port *port = phy->port;
911 	int j, no;
912 
913 	for_each_phy(port->wide_port_phymap, j, no) {
914 		if (j & 1) {
915 			MVS_CHIP_DISP->write_port_cfg_addr(mvi, no,
916 						PHYR_WIDE_PORT);
917 			MVS_CHIP_DISP->write_port_cfg_data(mvi, no,
918 						port->wide_port_phymap);
919 		} else {
920 			MVS_CHIP_DISP->write_port_cfg_addr(mvi, no,
921 						PHYR_WIDE_PORT);
922 			MVS_CHIP_DISP->write_port_cfg_data(mvi, no,
923 						0);
924 		}
925 	}
926 }
927 
mvs_is_phy_ready(struct mvs_info * mvi,int i)928 static u32 mvs_is_phy_ready(struct mvs_info *mvi, int i)
929 {
930 	u32 tmp;
931 	struct mvs_phy *phy = &mvi->phy[i];
932 	struct mvs_port *port = phy->port;
933 
934 	tmp = MVS_CHIP_DISP->read_phy_ctl(mvi, i);
935 	if ((tmp & PHY_READY_MASK) && !(phy->irq_status & PHYEV_POOF)) {
936 		if (!port)
937 			phy->phy_attached = 1;
938 		return tmp;
939 	}
940 
941 	if (port) {
942 		if (phy->phy_type & PORT_TYPE_SAS) {
943 			port->wide_port_phymap &= ~(1U << i);
944 			if (!port->wide_port_phymap)
945 				port->port_attached = 0;
946 			mvs_update_wideport(mvi, i);
947 		} else if (phy->phy_type & PORT_TYPE_SATA)
948 			port->port_attached = 0;
949 		phy->port = NULL;
950 		phy->phy_attached = 0;
951 		phy->phy_type &= ~(PORT_TYPE_SAS | PORT_TYPE_SATA);
952 	}
953 	return 0;
954 }
955 
mvs_get_d2h_reg(struct mvs_info * mvi,int i,void * buf)956 static void *mvs_get_d2h_reg(struct mvs_info *mvi, int i, void *buf)
957 {
958 	u32 *s = (u32 *) buf;
959 
960 	if (!s)
961 		return NULL;
962 
963 	MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG3);
964 	s[3] = cpu_to_le32(MVS_CHIP_DISP->read_port_cfg_data(mvi, i));
965 
966 	MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG2);
967 	s[2] = cpu_to_le32(MVS_CHIP_DISP->read_port_cfg_data(mvi, i));
968 
969 	MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG1);
970 	s[1] = cpu_to_le32(MVS_CHIP_DISP->read_port_cfg_data(mvi, i));
971 
972 	MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG0);
973 	s[0] = cpu_to_le32(MVS_CHIP_DISP->read_port_cfg_data(mvi, i));
974 
975 	if (((s[1] & 0x00FFFFFF) == 0x00EB1401) && (*(u8 *)&s[3] == 0x01))
976 		s[1] = 0x00EB1401 | (*((u8 *)&s[1] + 3) & 0x10);
977 
978 	return s;
979 }
980 
mvs_is_sig_fis_received(u32 irq_status)981 static u32 mvs_is_sig_fis_received(u32 irq_status)
982 {
983 	return irq_status & PHYEV_SIG_FIS;
984 }
985 
mvs_sig_remove_timer(struct mvs_phy * phy)986 static void mvs_sig_remove_timer(struct mvs_phy *phy)
987 {
988 	if (phy->timer.function)
989 		del_timer(&phy->timer);
990 	phy->timer.function = NULL;
991 }
992 
mvs_update_phyinfo(struct mvs_info * mvi,int i,int get_st)993 void mvs_update_phyinfo(struct mvs_info *mvi, int i, int get_st)
994 {
995 	struct mvs_phy *phy = &mvi->phy[i];
996 	struct sas_identify_frame *id;
997 
998 	id = (struct sas_identify_frame *)phy->frame_rcvd;
999 
1000 	if (get_st) {
1001 		phy->irq_status = MVS_CHIP_DISP->read_port_irq_stat(mvi, i);
1002 		phy->phy_status = mvs_is_phy_ready(mvi, i);
1003 	}
1004 
1005 	if (phy->phy_status) {
1006 		int oob_done = 0;
1007 		struct asd_sas_phy *sas_phy = &mvi->phy[i].sas_phy;
1008 
1009 		oob_done = MVS_CHIP_DISP->oob_done(mvi, i);
1010 
1011 		MVS_CHIP_DISP->fix_phy_info(mvi, i, id);
1012 		if (phy->phy_type & PORT_TYPE_SATA) {
1013 			phy->identify.target_port_protocols = SAS_PROTOCOL_STP;
1014 			if (mvs_is_sig_fis_received(phy->irq_status)) {
1015 				mvs_sig_remove_timer(phy);
1016 				phy->phy_attached = 1;
1017 				phy->att_dev_sas_addr =
1018 					i + mvi->id * mvi->chip->n_phy;
1019 				if (oob_done)
1020 					sas_phy->oob_mode = SATA_OOB_MODE;
1021 				phy->frame_rcvd_size =
1022 				    sizeof(struct dev_to_host_fis);
1023 				mvs_get_d2h_reg(mvi, i, id);
1024 			} else {
1025 				u32 tmp;
1026 				dev_printk(KERN_DEBUG, mvi->dev,
1027 					"Phy%d : No sig fis\n", i);
1028 				tmp = MVS_CHIP_DISP->read_port_irq_mask(mvi, i);
1029 				MVS_CHIP_DISP->write_port_irq_mask(mvi, i,
1030 						tmp | PHYEV_SIG_FIS);
1031 				phy->phy_attached = 0;
1032 				phy->phy_type &= ~PORT_TYPE_SATA;
1033 				goto out_done;
1034 			}
1035 		}	else if (phy->phy_type & PORT_TYPE_SAS
1036 			|| phy->att_dev_info & PORT_SSP_INIT_MASK) {
1037 			phy->phy_attached = 1;
1038 			phy->identify.device_type =
1039 				phy->att_dev_info & PORT_DEV_TYPE_MASK;
1040 
1041 			if (phy->identify.device_type == SAS_END_DEVICE)
1042 				phy->identify.target_port_protocols =
1043 							SAS_PROTOCOL_SSP;
1044 			else if (phy->identify.device_type != SAS_PHY_UNUSED)
1045 				phy->identify.target_port_protocols =
1046 							SAS_PROTOCOL_SMP;
1047 			if (oob_done)
1048 				sas_phy->oob_mode = SAS_OOB_MODE;
1049 			phy->frame_rcvd_size =
1050 			    sizeof(struct sas_identify_frame);
1051 		}
1052 		memcpy(sas_phy->attached_sas_addr,
1053 			&phy->att_dev_sas_addr, SAS_ADDR_SIZE);
1054 
1055 		if (MVS_CHIP_DISP->phy_work_around)
1056 			MVS_CHIP_DISP->phy_work_around(mvi, i);
1057 	}
1058 	mv_dprintk("phy %d attach dev info is %x\n",
1059 		i + mvi->id * mvi->chip->n_phy, phy->att_dev_info);
1060 	mv_dprintk("phy %d attach sas addr is %llx\n",
1061 		i + mvi->id * mvi->chip->n_phy, phy->att_dev_sas_addr);
1062 out_done:
1063 	if (get_st)
1064 		MVS_CHIP_DISP->write_port_irq_stat(mvi, i, phy->irq_status);
1065 }
1066 
mvs_port_notify_formed(struct asd_sas_phy * sas_phy,int lock)1067 static void mvs_port_notify_formed(struct asd_sas_phy *sas_phy, int lock)
1068 {
1069 	struct sas_ha_struct *sas_ha = sas_phy->ha;
1070 	struct mvs_info *mvi = NULL; int i = 0, hi;
1071 	struct mvs_phy *phy = sas_phy->lldd_phy;
1072 	struct asd_sas_port *sas_port = sas_phy->port;
1073 	struct mvs_port *port;
1074 	unsigned long flags = 0;
1075 	if (!sas_port)
1076 		return;
1077 
1078 	while (sas_ha->sas_phy[i]) {
1079 		if (sas_ha->sas_phy[i] == sas_phy)
1080 			break;
1081 		i++;
1082 	}
1083 	hi = i/((struct mvs_prv_info *)sas_ha->lldd_ha)->n_phy;
1084 	mvi = ((struct mvs_prv_info *)sas_ha->lldd_ha)->mvi[hi];
1085 	if (i >= mvi->chip->n_phy)
1086 		port = &mvi->port[i - mvi->chip->n_phy];
1087 	else
1088 		port = &mvi->port[i];
1089 	if (lock)
1090 		spin_lock_irqsave(&mvi->lock, flags);
1091 	port->port_attached = 1;
1092 	phy->port = port;
1093 	sas_port->lldd_port = port;
1094 	if (phy->phy_type & PORT_TYPE_SAS) {
1095 		port->wide_port_phymap = sas_port->phy_mask;
1096 		mv_printk("set wide port phy map %x\n", sas_port->phy_mask);
1097 		mvs_update_wideport(mvi, sas_phy->id);
1098 
1099 		/* direct attached SAS device */
1100 		if (phy->att_dev_info & PORT_SSP_TRGT_MASK) {
1101 			MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_PHY_STAT);
1102 			MVS_CHIP_DISP->write_port_cfg_data(mvi, i, 0x04);
1103 		}
1104 	}
1105 	if (lock)
1106 		spin_unlock_irqrestore(&mvi->lock, flags);
1107 }
1108 
mvs_port_notify_deformed(struct asd_sas_phy * sas_phy,int lock)1109 static void mvs_port_notify_deformed(struct asd_sas_phy *sas_phy, int lock)
1110 {
1111 	struct domain_device *dev;
1112 	struct mvs_phy *phy = sas_phy->lldd_phy;
1113 	struct mvs_info *mvi = phy->mvi;
1114 	struct asd_sas_port *port = sas_phy->port;
1115 	int phy_no = 0;
1116 
1117 	while (phy != &mvi->phy[phy_no]) {
1118 		phy_no++;
1119 		if (phy_no >= MVS_MAX_PHYS)
1120 			return;
1121 	}
1122 	list_for_each_entry(dev, &port->dev_list, dev_list_node)
1123 		mvs_do_release_task(phy->mvi, phy_no, dev);
1124 
1125 }
1126 
1127 
mvs_port_formed(struct asd_sas_phy * sas_phy)1128 void mvs_port_formed(struct asd_sas_phy *sas_phy)
1129 {
1130 	mvs_port_notify_formed(sas_phy, 1);
1131 }
1132 
mvs_port_deformed(struct asd_sas_phy * sas_phy)1133 void mvs_port_deformed(struct asd_sas_phy *sas_phy)
1134 {
1135 	mvs_port_notify_deformed(sas_phy, 1);
1136 }
1137 
mvs_alloc_dev(struct mvs_info * mvi)1138 static struct mvs_device *mvs_alloc_dev(struct mvs_info *mvi)
1139 {
1140 	u32 dev;
1141 	for (dev = 0; dev < MVS_MAX_DEVICES; dev++) {
1142 		if (mvi->devices[dev].dev_type == SAS_PHY_UNUSED) {
1143 			mvi->devices[dev].device_id = dev;
1144 			return &mvi->devices[dev];
1145 		}
1146 	}
1147 
1148 	if (dev == MVS_MAX_DEVICES)
1149 		mv_printk("max support %d devices, ignore ..\n",
1150 			MVS_MAX_DEVICES);
1151 
1152 	return NULL;
1153 }
1154 
mvs_free_dev(struct mvs_device * mvi_dev)1155 static void mvs_free_dev(struct mvs_device *mvi_dev)
1156 {
1157 	u32 id = mvi_dev->device_id;
1158 	memset(mvi_dev, 0, sizeof(*mvi_dev));
1159 	mvi_dev->device_id = id;
1160 	mvi_dev->dev_type = SAS_PHY_UNUSED;
1161 	mvi_dev->dev_status = MVS_DEV_NORMAL;
1162 	mvi_dev->taskfileset = MVS_ID_NOT_MAPPED;
1163 }
1164 
mvs_dev_found_notify(struct domain_device * dev,int lock)1165 static int mvs_dev_found_notify(struct domain_device *dev, int lock)
1166 {
1167 	unsigned long flags = 0;
1168 	int res = 0;
1169 	struct mvs_info *mvi = NULL;
1170 	struct domain_device *parent_dev = dev->parent;
1171 	struct mvs_device *mvi_device;
1172 
1173 	mvi = mvs_find_dev_mvi(dev);
1174 
1175 	if (lock)
1176 		spin_lock_irqsave(&mvi->lock, flags);
1177 
1178 	mvi_device = mvs_alloc_dev(mvi);
1179 	if (!mvi_device) {
1180 		res = -1;
1181 		goto found_out;
1182 	}
1183 	dev->lldd_dev = mvi_device;
1184 	mvi_device->dev_status = MVS_DEV_NORMAL;
1185 	mvi_device->dev_type = dev->dev_type;
1186 	mvi_device->mvi_info = mvi;
1187 	mvi_device->sas_device = dev;
1188 	if (parent_dev && dev_is_expander(parent_dev->dev_type)) {
1189 		int phy_id;
1190 
1191 		phy_id = sas_find_attached_phy_id(&parent_dev->ex_dev, dev);
1192 		if (phy_id < 0) {
1193 			mv_printk("Error: no attached dev:%016llx"
1194 				"at ex:%016llx.\n",
1195 				SAS_ADDR(dev->sas_addr),
1196 				SAS_ADDR(parent_dev->sas_addr));
1197 			res = phy_id;
1198 		} else {
1199 			mvi_device->attached_phy = phy_id;
1200 		}
1201 	}
1202 
1203 found_out:
1204 	if (lock)
1205 		spin_unlock_irqrestore(&mvi->lock, flags);
1206 	return res;
1207 }
1208 
mvs_dev_found(struct domain_device * dev)1209 int mvs_dev_found(struct domain_device *dev)
1210 {
1211 	return mvs_dev_found_notify(dev, 1);
1212 }
1213 
mvs_dev_gone_notify(struct domain_device * dev)1214 static void mvs_dev_gone_notify(struct domain_device *dev)
1215 {
1216 	unsigned long flags = 0;
1217 	struct mvs_device *mvi_dev = dev->lldd_dev;
1218 	struct mvs_info *mvi;
1219 
1220 	if (!mvi_dev) {
1221 		mv_dprintk("found dev has gone.\n");
1222 		return;
1223 	}
1224 
1225 	mvi = mvi_dev->mvi_info;
1226 
1227 	spin_lock_irqsave(&mvi->lock, flags);
1228 
1229 	mv_dprintk("found dev[%d:%x] is gone.\n",
1230 		mvi_dev->device_id, mvi_dev->dev_type);
1231 	mvs_release_task(mvi, dev);
1232 	mvs_free_reg_set(mvi, mvi_dev);
1233 	mvs_free_dev(mvi_dev);
1234 
1235 	dev->lldd_dev = NULL;
1236 	mvi_dev->sas_device = NULL;
1237 
1238 	spin_unlock_irqrestore(&mvi->lock, flags);
1239 }
1240 
1241 
mvs_dev_gone(struct domain_device * dev)1242 void mvs_dev_gone(struct domain_device *dev)
1243 {
1244 	mvs_dev_gone_notify(dev);
1245 }
1246 
1247 /*  Standard mandates link reset for ATA  (type 0)
1248     and hard reset for SSP (type 1) , only for RECOVERY */
mvs_debug_I_T_nexus_reset(struct domain_device * dev)1249 static int mvs_debug_I_T_nexus_reset(struct domain_device *dev)
1250 {
1251 	int rc;
1252 	struct sas_phy *phy = sas_get_local_phy(dev);
1253 	int reset_type = (dev->dev_type == SAS_SATA_DEV ||
1254 			(dev->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
1255 	rc = sas_phy_reset(phy, reset_type);
1256 	sas_put_local_phy(phy);
1257 	msleep(2000);
1258 	return rc;
1259 }
1260 
1261 /* mandatory SAM-3 */
mvs_lu_reset(struct domain_device * dev,u8 * lun)1262 int mvs_lu_reset(struct domain_device *dev, u8 *lun)
1263 {
1264 	unsigned long flags;
1265 	int rc = TMF_RESP_FUNC_FAILED;
1266 	struct mvs_device * mvi_dev = dev->lldd_dev;
1267 	struct mvs_info *mvi = mvi_dev->mvi_info;
1268 
1269 	mvi_dev->dev_status = MVS_DEV_EH;
1270 	rc = sas_lu_reset(dev, lun);
1271 	if (rc == TMF_RESP_FUNC_COMPLETE) {
1272 		spin_lock_irqsave(&mvi->lock, flags);
1273 		mvs_release_task(mvi, dev);
1274 		spin_unlock_irqrestore(&mvi->lock, flags);
1275 	}
1276 	/* If failed, fall-through I_T_Nexus reset */
1277 	mv_printk("%s for device[%x]:rc= %d\n", __func__,
1278 			mvi_dev->device_id, rc);
1279 	return rc;
1280 }
1281 
mvs_I_T_nexus_reset(struct domain_device * dev)1282 int mvs_I_T_nexus_reset(struct domain_device *dev)
1283 {
1284 	unsigned long flags;
1285 	int rc = TMF_RESP_FUNC_FAILED;
1286 	struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
1287 	struct mvs_info *mvi = mvi_dev->mvi_info;
1288 
1289 	if (mvi_dev->dev_status != MVS_DEV_EH)
1290 		return TMF_RESP_FUNC_COMPLETE;
1291 	else
1292 		mvi_dev->dev_status = MVS_DEV_NORMAL;
1293 	rc = mvs_debug_I_T_nexus_reset(dev);
1294 	mv_printk("%s for device[%x]:rc= %d\n",
1295 		__func__, mvi_dev->device_id, rc);
1296 
1297 	spin_lock_irqsave(&mvi->lock, flags);
1298 	mvs_release_task(mvi, dev);
1299 	spin_unlock_irqrestore(&mvi->lock, flags);
1300 
1301 	return rc;
1302 }
1303 /* optional SAM-3 */
mvs_query_task(struct sas_task * task)1304 int mvs_query_task(struct sas_task *task)
1305 {
1306 	u32 tag;
1307 	int rc = TMF_RESP_FUNC_FAILED;
1308 
1309 	if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1310 		struct domain_device *dev = task->dev;
1311 		struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
1312 		struct mvs_info *mvi = mvi_dev->mvi_info;
1313 
1314 		rc = mvs_find_tag(mvi, task, &tag);
1315 		if (rc == 0) {
1316 			rc = TMF_RESP_FUNC_FAILED;
1317 			return rc;
1318 		}
1319 
1320 		rc = sas_query_task(task, tag);
1321 		switch (rc) {
1322 		/* The task is still in Lun, release it then */
1323 		case TMF_RESP_FUNC_SUCC:
1324 		/* The task is not in Lun or failed, reset the phy */
1325 		case TMF_RESP_FUNC_FAILED:
1326 		case TMF_RESP_FUNC_COMPLETE:
1327 			break;
1328 		}
1329 	}
1330 	mv_printk("%s:rc= %d\n", __func__, rc);
1331 	return rc;
1332 }
1333 
1334 /*  mandatory SAM-3, still need free task/slot info */
mvs_abort_task(struct sas_task * task)1335 int mvs_abort_task(struct sas_task *task)
1336 {
1337 	struct domain_device *dev = task->dev;
1338 	struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
1339 	struct mvs_info *mvi;
1340 	int rc = TMF_RESP_FUNC_FAILED;
1341 	unsigned long flags;
1342 	u32 tag;
1343 
1344 	if (!mvi_dev) {
1345 		mv_printk("Device has removed\n");
1346 		return TMF_RESP_FUNC_FAILED;
1347 	}
1348 
1349 	mvi = mvi_dev->mvi_info;
1350 
1351 	spin_lock_irqsave(&task->task_state_lock, flags);
1352 	if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1353 		spin_unlock_irqrestore(&task->task_state_lock, flags);
1354 		rc = TMF_RESP_FUNC_COMPLETE;
1355 		goto out;
1356 	}
1357 	spin_unlock_irqrestore(&task->task_state_lock, flags);
1358 	mvi_dev->dev_status = MVS_DEV_EH;
1359 	if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1360 		rc = mvs_find_tag(mvi, task, &tag);
1361 		if (rc == 0) {
1362 			mv_printk("No such tag in %s\n", __func__);
1363 			rc = TMF_RESP_FUNC_FAILED;
1364 			return rc;
1365 		}
1366 
1367 		rc = sas_abort_task(task, tag);
1368 
1369 		/* if successful, clear the task and callback forwards.*/
1370 		if (rc == TMF_RESP_FUNC_COMPLETE) {
1371 			u32 slot_no;
1372 			struct mvs_slot_info *slot;
1373 
1374 			if (task->lldd_task) {
1375 				slot = task->lldd_task;
1376 				slot_no = (u32) (slot - mvi->slot_info);
1377 				spin_lock_irqsave(&mvi->lock, flags);
1378 				mvs_slot_complete(mvi, slot_no, 1);
1379 				spin_unlock_irqrestore(&mvi->lock, flags);
1380 			}
1381 		}
1382 
1383 	} else if (task->task_proto & SAS_PROTOCOL_SATA ||
1384 		task->task_proto & SAS_PROTOCOL_STP) {
1385 		if (SAS_SATA_DEV == dev->dev_type) {
1386 			struct mvs_slot_info *slot = task->lldd_task;
1387 			u32 slot_idx = (u32)(slot - mvi->slot_info);
1388 			mv_dprintk("mvs_abort_task() mvi=%p task=%p "
1389 				   "slot=%p slot_idx=x%x\n",
1390 				   mvi, task, slot, slot_idx);
1391 			task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1392 			mvs_slot_task_free(mvi, task, slot, slot_idx);
1393 			rc = TMF_RESP_FUNC_COMPLETE;
1394 			goto out;
1395 		}
1396 
1397 	}
1398 out:
1399 	if (rc != TMF_RESP_FUNC_COMPLETE)
1400 		mv_printk("%s:rc= %d\n", __func__, rc);
1401 	return rc;
1402 }
1403 
mvs_sata_done(struct mvs_info * mvi,struct sas_task * task,u32 slot_idx,int err)1404 static int mvs_sata_done(struct mvs_info *mvi, struct sas_task *task,
1405 			u32 slot_idx, int err)
1406 {
1407 	struct mvs_device *mvi_dev = task->dev->lldd_dev;
1408 	struct task_status_struct *tstat = &task->task_status;
1409 	struct ata_task_resp *resp = (struct ata_task_resp *)tstat->buf;
1410 	int stat = SAM_STAT_GOOD;
1411 
1412 
1413 	resp->frame_len = sizeof(struct dev_to_host_fis);
1414 	memcpy(&resp->ending_fis[0],
1415 	       SATA_RECEIVED_D2H_FIS(mvi_dev->taskfileset),
1416 	       sizeof(struct dev_to_host_fis));
1417 	tstat->buf_valid_size = sizeof(*resp);
1418 	if (unlikely(err)) {
1419 		if (unlikely(err & CMD_ISS_STPD))
1420 			stat = SAS_OPEN_REJECT;
1421 		else
1422 			stat = SAS_PROTO_RESPONSE;
1423        }
1424 
1425 	return stat;
1426 }
1427 
mvs_set_sense(u8 * buffer,int len,int d_sense,int key,int asc,int ascq)1428 static void mvs_set_sense(u8 *buffer, int len, int d_sense,
1429 		int key, int asc, int ascq)
1430 {
1431 	memset(buffer, 0, len);
1432 
1433 	if (d_sense) {
1434 		/* Descriptor format */
1435 		if (len < 4) {
1436 			mv_printk("Length %d of sense buffer too small to "
1437 				"fit sense %x:%x:%x", len, key, asc, ascq);
1438 		}
1439 
1440 		buffer[0] = 0x72;		/* Response Code	*/
1441 		if (len > 1)
1442 			buffer[1] = key;	/* Sense Key */
1443 		if (len > 2)
1444 			buffer[2] = asc;	/* ASC	*/
1445 		if (len > 3)
1446 			buffer[3] = ascq;	/* ASCQ	*/
1447 	} else {
1448 		if (len < 14) {
1449 			mv_printk("Length %d of sense buffer too small to "
1450 				"fit sense %x:%x:%x", len, key, asc, ascq);
1451 		}
1452 
1453 		buffer[0] = 0x70;		/* Response Code	*/
1454 		if (len > 2)
1455 			buffer[2] = key;	/* Sense Key */
1456 		if (len > 7)
1457 			buffer[7] = 0x0a;	/* Additional Sense Length */
1458 		if (len > 12)
1459 			buffer[12] = asc;	/* ASC */
1460 		if (len > 13)
1461 			buffer[13] = ascq; /* ASCQ */
1462 	}
1463 
1464 	return;
1465 }
1466 
mvs_fill_ssp_resp_iu(struct ssp_response_iu * iu,u8 key,u8 asc,u8 asc_q)1467 static void mvs_fill_ssp_resp_iu(struct ssp_response_iu *iu,
1468 				u8 key, u8 asc, u8 asc_q)
1469 {
1470 	iu->datapres = SAS_DATAPRES_SENSE_DATA;
1471 	iu->response_data_len = 0;
1472 	iu->sense_data_len = 17;
1473 	iu->status = 02;
1474 	mvs_set_sense(iu->sense_data, 17, 0,
1475 			key, asc, asc_q);
1476 }
1477 
mvs_slot_err(struct mvs_info * mvi,struct sas_task * task,u32 slot_idx)1478 static int mvs_slot_err(struct mvs_info *mvi, struct sas_task *task,
1479 			 u32 slot_idx)
1480 {
1481 	struct mvs_slot_info *slot = &mvi->slot_info[slot_idx];
1482 	int stat;
1483 	u32 err_dw0 = le32_to_cpu(*(u32 *)slot->response);
1484 	u32 err_dw1 = le32_to_cpu(*((u32 *)slot->response + 1));
1485 	u32 tfs = 0;
1486 	enum mvs_port_type type = PORT_TYPE_SAS;
1487 
1488 	if (err_dw0 & CMD_ISS_STPD)
1489 		MVS_CHIP_DISP->issue_stop(mvi, type, tfs);
1490 
1491 	MVS_CHIP_DISP->command_active(mvi, slot_idx);
1492 
1493 	stat = SAM_STAT_CHECK_CONDITION;
1494 	switch (task->task_proto) {
1495 	case SAS_PROTOCOL_SSP:
1496 	{
1497 		stat = SAS_ABORTED_TASK;
1498 		if ((err_dw0 & NO_DEST) || err_dw1 & bit(31)) {
1499 			struct ssp_response_iu *iu = slot->response +
1500 				sizeof(struct mvs_err_info);
1501 			mvs_fill_ssp_resp_iu(iu, NOT_READY, 0x04, 01);
1502 			sas_ssp_task_response(mvi->dev, task, iu);
1503 			stat = SAM_STAT_CHECK_CONDITION;
1504 		}
1505 		if (err_dw1 & bit(31))
1506 			mv_printk("reuse same slot, retry command.\n");
1507 		break;
1508 	}
1509 	case SAS_PROTOCOL_SMP:
1510 		stat = SAM_STAT_CHECK_CONDITION;
1511 		break;
1512 
1513 	case SAS_PROTOCOL_SATA:
1514 	case SAS_PROTOCOL_STP:
1515 	case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
1516 	{
1517 		task->ata_task.use_ncq = 0;
1518 		stat = SAS_PROTO_RESPONSE;
1519 		mvs_sata_done(mvi, task, slot_idx, err_dw0);
1520 	}
1521 		break;
1522 	default:
1523 		break;
1524 	}
1525 
1526 	return stat;
1527 }
1528 
mvs_slot_complete(struct mvs_info * mvi,u32 rx_desc,u32 flags)1529 int mvs_slot_complete(struct mvs_info *mvi, u32 rx_desc, u32 flags)
1530 {
1531 	u32 slot_idx = rx_desc & RXQ_SLOT_MASK;
1532 	struct mvs_slot_info *slot = &mvi->slot_info[slot_idx];
1533 	struct sas_task *task = slot->task;
1534 	struct mvs_device *mvi_dev = NULL;
1535 	struct task_status_struct *tstat;
1536 	struct domain_device *dev;
1537 	u32 aborted;
1538 
1539 	void *to;
1540 	enum exec_status sts;
1541 
1542 	if (unlikely(!task || !task->lldd_task || !task->dev))
1543 		return -1;
1544 
1545 	tstat = &task->task_status;
1546 	dev = task->dev;
1547 	mvi_dev = dev->lldd_dev;
1548 
1549 	spin_lock(&task->task_state_lock);
1550 	task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
1551 	task->task_state_flags |= SAS_TASK_STATE_DONE;
1552 	/* race condition*/
1553 	aborted = task->task_state_flags & SAS_TASK_STATE_ABORTED;
1554 	spin_unlock(&task->task_state_lock);
1555 
1556 	memset(tstat, 0, sizeof(*tstat));
1557 	tstat->resp = SAS_TASK_COMPLETE;
1558 
1559 	if (unlikely(aborted)) {
1560 		tstat->stat = SAS_ABORTED_TASK;
1561 		if (mvi_dev && mvi_dev->running_req)
1562 			mvi_dev->running_req--;
1563 		if (sas_protocol_ata(task->task_proto))
1564 			mvs_free_reg_set(mvi, mvi_dev);
1565 
1566 		mvs_slot_task_free(mvi, task, slot, slot_idx);
1567 		return -1;
1568 	}
1569 
1570 	/* when no device attaching, go ahead and complete by error handling*/
1571 	if (unlikely(!mvi_dev || flags)) {
1572 		if (!mvi_dev)
1573 			mv_dprintk("port has not device.\n");
1574 		tstat->stat = SAS_PHY_DOWN;
1575 		goto out;
1576 	}
1577 
1578 	/*
1579 	 * error info record present; slot->response is 32 bit aligned but may
1580 	 * not be 64 bit aligned, so check for zero in two 32 bit reads
1581 	 */
1582 	if (unlikely((rx_desc & RXQ_ERR)
1583 		     && (*((u32 *)slot->response)
1584 			 || *(((u32 *)slot->response) + 1)))) {
1585 		mv_dprintk("port %d slot %d rx_desc %X has error info"
1586 			"%016llX.\n", slot->port->sas_port.id, slot_idx,
1587 			 rx_desc, get_unaligned_le64(slot->response));
1588 		tstat->stat = mvs_slot_err(mvi, task, slot_idx);
1589 		tstat->resp = SAS_TASK_COMPLETE;
1590 		goto out;
1591 	}
1592 
1593 	switch (task->task_proto) {
1594 	case SAS_PROTOCOL_SSP:
1595 		/* hw says status == 0, datapres == 0 */
1596 		if (rx_desc & RXQ_GOOD) {
1597 			tstat->stat = SAS_SAM_STAT_GOOD;
1598 			tstat->resp = SAS_TASK_COMPLETE;
1599 		}
1600 		/* response frame present */
1601 		else if (rx_desc & RXQ_RSP) {
1602 			struct ssp_response_iu *iu = slot->response +
1603 						sizeof(struct mvs_err_info);
1604 			sas_ssp_task_response(mvi->dev, task, iu);
1605 		} else
1606 			tstat->stat = SAS_SAM_STAT_CHECK_CONDITION;
1607 		break;
1608 
1609 	case SAS_PROTOCOL_SMP: {
1610 			struct scatterlist *sg_resp = &task->smp_task.smp_resp;
1611 			tstat->stat = SAS_SAM_STAT_GOOD;
1612 			to = kmap_atomic(sg_page(sg_resp));
1613 			memcpy(to + sg_resp->offset,
1614 				slot->response + sizeof(struct mvs_err_info),
1615 				sg_dma_len(sg_resp));
1616 			kunmap_atomic(to);
1617 			break;
1618 		}
1619 
1620 	case SAS_PROTOCOL_SATA:
1621 	case SAS_PROTOCOL_STP:
1622 	case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP: {
1623 			tstat->stat = mvs_sata_done(mvi, task, slot_idx, 0);
1624 			break;
1625 		}
1626 
1627 	default:
1628 		tstat->stat = SAS_SAM_STAT_CHECK_CONDITION;
1629 		break;
1630 	}
1631 	if (!slot->port->port_attached) {
1632 		mv_dprintk("port %d has removed.\n", slot->port->sas_port.id);
1633 		tstat->stat = SAS_PHY_DOWN;
1634 	}
1635 
1636 
1637 out:
1638 	if (mvi_dev && mvi_dev->running_req) {
1639 		mvi_dev->running_req--;
1640 		if (sas_protocol_ata(task->task_proto) && !mvi_dev->running_req)
1641 			mvs_free_reg_set(mvi, mvi_dev);
1642 	}
1643 	mvs_slot_task_free(mvi, task, slot, slot_idx);
1644 	sts = tstat->stat;
1645 
1646 	spin_unlock(&mvi->lock);
1647 	if (task->task_done)
1648 		task->task_done(task);
1649 
1650 	spin_lock(&mvi->lock);
1651 
1652 	return sts;
1653 }
1654 
mvs_do_release_task(struct mvs_info * mvi,int phy_no,struct domain_device * dev)1655 void mvs_do_release_task(struct mvs_info *mvi,
1656 		int phy_no, struct domain_device *dev)
1657 {
1658 	u32 slot_idx;
1659 	struct mvs_phy *phy;
1660 	struct mvs_port *port;
1661 	struct mvs_slot_info *slot, *slot2;
1662 
1663 	phy = &mvi->phy[phy_no];
1664 	port = phy->port;
1665 	if (!port)
1666 		return;
1667 	/* clean cmpl queue in case request is already finished */
1668 	mvs_int_rx(mvi, false);
1669 
1670 
1671 
1672 	list_for_each_entry_safe(slot, slot2, &port->list, entry) {
1673 		struct sas_task *task;
1674 		slot_idx = (u32) (slot - mvi->slot_info);
1675 		task = slot->task;
1676 
1677 		if (dev && task->dev != dev)
1678 			continue;
1679 
1680 		mv_printk("Release slot [%x] tag[%x], task [%p]:\n",
1681 			slot_idx, slot->slot_tag, task);
1682 		MVS_CHIP_DISP->command_active(mvi, slot_idx);
1683 
1684 		mvs_slot_complete(mvi, slot_idx, 1);
1685 	}
1686 }
1687 
mvs_release_task(struct mvs_info * mvi,struct domain_device * dev)1688 void mvs_release_task(struct mvs_info *mvi,
1689 		      struct domain_device *dev)
1690 {
1691 	int i, phyno[WIDE_PORT_MAX_PHY], num;
1692 	num = mvs_find_dev_phyno(dev, phyno);
1693 	for (i = 0; i < num; i++)
1694 		mvs_do_release_task(mvi, phyno[i], dev);
1695 }
1696 
mvs_phy_disconnected(struct mvs_phy * phy)1697 static void mvs_phy_disconnected(struct mvs_phy *phy)
1698 {
1699 	phy->phy_attached = 0;
1700 	phy->att_dev_info = 0;
1701 	phy->att_dev_sas_addr = 0;
1702 }
1703 
mvs_work_queue(struct work_struct * work)1704 static void mvs_work_queue(struct work_struct *work)
1705 {
1706 	struct delayed_work *dw = container_of(work, struct delayed_work, work);
1707 	struct mvs_wq *mwq = container_of(dw, struct mvs_wq, work_q);
1708 	struct mvs_info *mvi = mwq->mvi;
1709 	unsigned long flags;
1710 	u32 phy_no = (unsigned long) mwq->data;
1711 	struct mvs_phy *phy = &mvi->phy[phy_no];
1712 	struct asd_sas_phy *sas_phy = &phy->sas_phy;
1713 
1714 	spin_lock_irqsave(&mvi->lock, flags);
1715 	if (mwq->handler & PHY_PLUG_EVENT) {
1716 
1717 		if (phy->phy_event & PHY_PLUG_OUT) {
1718 			u32 tmp;
1719 
1720 			tmp = MVS_CHIP_DISP->read_phy_ctl(mvi, phy_no);
1721 			phy->phy_event &= ~PHY_PLUG_OUT;
1722 			if (!(tmp & PHY_READY_MASK)) {
1723 				sas_phy_disconnected(sas_phy);
1724 				mvs_phy_disconnected(phy);
1725 				sas_notify_phy_event(sas_phy,
1726 					PHYE_LOSS_OF_SIGNAL, GFP_ATOMIC);
1727 				mv_dprintk("phy%d Removed Device\n", phy_no);
1728 			} else {
1729 				MVS_CHIP_DISP->detect_porttype(mvi, phy_no);
1730 				mvs_update_phyinfo(mvi, phy_no, 1);
1731 				mvs_bytes_dmaed(mvi, phy_no, GFP_ATOMIC);
1732 				mvs_port_notify_formed(sas_phy, 0);
1733 				mv_dprintk("phy%d Attached Device\n", phy_no);
1734 			}
1735 		}
1736 	} else if (mwq->handler & EXP_BRCT_CHG) {
1737 		phy->phy_event &= ~EXP_BRCT_CHG;
1738 		sas_notify_port_event(sas_phy,
1739 				PORTE_BROADCAST_RCVD, GFP_ATOMIC);
1740 		mv_dprintk("phy%d Got Broadcast Change\n", phy_no);
1741 	}
1742 	list_del(&mwq->entry);
1743 	spin_unlock_irqrestore(&mvi->lock, flags);
1744 	kfree(mwq);
1745 }
1746 
mvs_handle_event(struct mvs_info * mvi,void * data,int handler)1747 static int mvs_handle_event(struct mvs_info *mvi, void *data, int handler)
1748 {
1749 	struct mvs_wq *mwq;
1750 	int ret = 0;
1751 
1752 	mwq = kmalloc(sizeof(struct mvs_wq), GFP_ATOMIC);
1753 	if (mwq) {
1754 		mwq->mvi = mvi;
1755 		mwq->data = data;
1756 		mwq->handler = handler;
1757 		MV_INIT_DELAYED_WORK(&mwq->work_q, mvs_work_queue, mwq);
1758 		list_add_tail(&mwq->entry, &mvi->wq_list);
1759 		schedule_delayed_work(&mwq->work_q, HZ * 2);
1760 	} else
1761 		ret = -ENOMEM;
1762 
1763 	return ret;
1764 }
1765 
mvs_sig_time_out(struct timer_list * t)1766 static void mvs_sig_time_out(struct timer_list *t)
1767 {
1768 	struct mvs_phy *phy = from_timer(phy, t, timer);
1769 	struct mvs_info *mvi = phy->mvi;
1770 	u8 phy_no;
1771 
1772 	for (phy_no = 0; phy_no < mvi->chip->n_phy; phy_no++) {
1773 		if (&mvi->phy[phy_no] == phy) {
1774 			mv_dprintk("Get signature time out, reset phy %d\n",
1775 				phy_no+mvi->id*mvi->chip->n_phy);
1776 			MVS_CHIP_DISP->phy_reset(mvi, phy_no, MVS_HARD_RESET);
1777 		}
1778 	}
1779 }
1780 
mvs_int_port(struct mvs_info * mvi,int phy_no,u32 events)1781 void mvs_int_port(struct mvs_info *mvi, int phy_no, u32 events)
1782 {
1783 	u32 tmp;
1784 	struct mvs_phy *phy = &mvi->phy[phy_no];
1785 
1786 	phy->irq_status = MVS_CHIP_DISP->read_port_irq_stat(mvi, phy_no);
1787 	MVS_CHIP_DISP->write_port_irq_stat(mvi, phy_no, phy->irq_status);
1788 	mv_dprintk("phy %d ctrl sts=0x%08X.\n", phy_no+mvi->id*mvi->chip->n_phy,
1789 		MVS_CHIP_DISP->read_phy_ctl(mvi, phy_no));
1790 	mv_dprintk("phy %d irq sts = 0x%08X\n", phy_no+mvi->id*mvi->chip->n_phy,
1791 		phy->irq_status);
1792 
1793 	/*
1794 	* events is port event now ,
1795 	* we need check the interrupt status which belongs to per port.
1796 	*/
1797 
1798 	if (phy->irq_status & PHYEV_DCDR_ERR) {
1799 		mv_dprintk("phy %d STP decoding error.\n",
1800 		phy_no + mvi->id*mvi->chip->n_phy);
1801 	}
1802 
1803 	if (phy->irq_status & PHYEV_POOF) {
1804 		mdelay(500);
1805 		if (!(phy->phy_event & PHY_PLUG_OUT)) {
1806 			int dev_sata = phy->phy_type & PORT_TYPE_SATA;
1807 			int ready;
1808 			mvs_do_release_task(mvi, phy_no, NULL);
1809 			phy->phy_event |= PHY_PLUG_OUT;
1810 			MVS_CHIP_DISP->clear_srs_irq(mvi, 0, 1);
1811 			mvs_handle_event(mvi,
1812 				(void *)(unsigned long)phy_no,
1813 				PHY_PLUG_EVENT);
1814 			ready = mvs_is_phy_ready(mvi, phy_no);
1815 			if (ready || dev_sata) {
1816 				if (MVS_CHIP_DISP->stp_reset)
1817 					MVS_CHIP_DISP->stp_reset(mvi,
1818 							phy_no);
1819 				else
1820 					MVS_CHIP_DISP->phy_reset(mvi,
1821 							phy_no, MVS_SOFT_RESET);
1822 				return;
1823 			}
1824 		}
1825 	}
1826 
1827 	if (phy->irq_status & PHYEV_COMWAKE) {
1828 		tmp = MVS_CHIP_DISP->read_port_irq_mask(mvi, phy_no);
1829 		MVS_CHIP_DISP->write_port_irq_mask(mvi, phy_no,
1830 					tmp | PHYEV_SIG_FIS);
1831 		if (phy->timer.function == NULL) {
1832 			phy->timer.function = mvs_sig_time_out;
1833 			phy->timer.expires = jiffies + 5*HZ;
1834 			add_timer(&phy->timer);
1835 		}
1836 	}
1837 	if (phy->irq_status & (PHYEV_SIG_FIS | PHYEV_ID_DONE)) {
1838 		phy->phy_status = mvs_is_phy_ready(mvi, phy_no);
1839 		mv_dprintk("notify plug in on phy[%d]\n", phy_no);
1840 		if (phy->phy_status) {
1841 			mdelay(10);
1842 			MVS_CHIP_DISP->detect_porttype(mvi, phy_no);
1843 			if (phy->phy_type & PORT_TYPE_SATA) {
1844 				tmp = MVS_CHIP_DISP->read_port_irq_mask(
1845 						mvi, phy_no);
1846 				tmp &= ~PHYEV_SIG_FIS;
1847 				MVS_CHIP_DISP->write_port_irq_mask(mvi,
1848 							phy_no, tmp);
1849 			}
1850 			mvs_update_phyinfo(mvi, phy_no, 0);
1851 			if (phy->phy_type & PORT_TYPE_SAS) {
1852 				MVS_CHIP_DISP->phy_reset(mvi, phy_no, MVS_PHY_TUNE);
1853 				mdelay(10);
1854 			}
1855 
1856 			mvs_bytes_dmaed(mvi, phy_no, GFP_ATOMIC);
1857 			/* whether driver is going to handle hot plug */
1858 			if (phy->phy_event & PHY_PLUG_OUT) {
1859 				mvs_port_notify_formed(&phy->sas_phy, 0);
1860 				phy->phy_event &= ~PHY_PLUG_OUT;
1861 			}
1862 		} else {
1863 			mv_dprintk("plugin interrupt but phy%d is gone\n",
1864 				phy_no + mvi->id*mvi->chip->n_phy);
1865 		}
1866 	} else if (phy->irq_status & PHYEV_BROAD_CH) {
1867 		mv_dprintk("phy %d broadcast change.\n",
1868 			phy_no + mvi->id*mvi->chip->n_phy);
1869 		mvs_handle_event(mvi, (void *)(unsigned long)phy_no,
1870 				EXP_BRCT_CHG);
1871 	}
1872 }
1873 
mvs_int_rx(struct mvs_info * mvi,bool self_clear)1874 int mvs_int_rx(struct mvs_info *mvi, bool self_clear)
1875 {
1876 	u32 rx_prod_idx, rx_desc;
1877 	bool attn = false;
1878 
1879 	/* the first dword in the RX ring is special: it contains
1880 	 * a mirror of the hardware's RX producer index, so that
1881 	 * we don't have to stall the CPU reading that register.
1882 	 * The actual RX ring is offset by one dword, due to this.
1883 	 */
1884 	rx_prod_idx = mvi->rx_cons;
1885 	mvi->rx_cons = le32_to_cpu(mvi->rx[0]);
1886 	if (mvi->rx_cons == 0xfff)	/* h/w hasn't touched RX ring yet */
1887 		return 0;
1888 
1889 	/* The CMPL_Q may come late, read from register and try again
1890 	* note: if coalescing is enabled,
1891 	* it will need to read from register every time for sure
1892 	*/
1893 	if (unlikely(mvi->rx_cons == rx_prod_idx))
1894 		mvi->rx_cons = MVS_CHIP_DISP->rx_update(mvi) & RX_RING_SZ_MASK;
1895 
1896 	if (mvi->rx_cons == rx_prod_idx)
1897 		return 0;
1898 
1899 	while (mvi->rx_cons != rx_prod_idx) {
1900 		/* increment our internal RX consumer pointer */
1901 		rx_prod_idx = (rx_prod_idx + 1) & (MVS_RX_RING_SZ - 1);
1902 		rx_desc = le32_to_cpu(mvi->rx[rx_prod_idx + 1]);
1903 
1904 		if (likely(rx_desc & RXQ_DONE))
1905 			mvs_slot_complete(mvi, rx_desc, 0);
1906 		if (rx_desc & RXQ_ATTN) {
1907 			attn = true;
1908 		} else if (rx_desc & RXQ_ERR) {
1909 			if (!(rx_desc & RXQ_DONE))
1910 				mvs_slot_complete(mvi, rx_desc, 0);
1911 		} else if (rx_desc & RXQ_SLOT_RESET) {
1912 			mvs_slot_free(mvi, rx_desc);
1913 		}
1914 	}
1915 
1916 	if (attn && self_clear)
1917 		MVS_CHIP_DISP->int_full(mvi);
1918 	return 0;
1919 }
1920 
mvs_gpio_write(struct sas_ha_struct * sha,u8 reg_type,u8 reg_index,u8 reg_count,u8 * write_data)1921 int mvs_gpio_write(struct sas_ha_struct *sha, u8 reg_type, u8 reg_index,
1922 			u8 reg_count, u8 *write_data)
1923 {
1924 	struct mvs_prv_info *mvs_prv = sha->lldd_ha;
1925 	struct mvs_info *mvi = mvs_prv->mvi[0];
1926 
1927 	if (MVS_CHIP_DISP->gpio_write) {
1928 		return MVS_CHIP_DISP->gpio_write(mvs_prv, reg_type,
1929 			reg_index, reg_count, write_data);
1930 	}
1931 
1932 	return -ENOSYS;
1933 }
1934