summaryrefslogtreecommitdiffstats
path: root/drivers/scsi/esas2r/esas2r_vda.c
blob: 30028e56df63790e7f8ae1a9b6caec3a729fc966 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
/*
 *  linux/drivers/scsi/esas2r/esas2r_vda.c
 *      esas2r driver VDA firmware interface functions
 *
 *  Copyright (c) 2001-2013 ATTO Technology, Inc.
 *  (mailto:linuxdrivers@attotech.com)
 */
/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; version 2 of the License.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  NO WARRANTY
 *  THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
 *  CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
 *  LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
 *  MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
 *  solely responsible for determining the appropriateness of using and
 *  distributing the Program and assumes all risks associated with its
 *  exercise of rights under this Agreement, including but not limited to
 *  the risks and costs of program errors, damage to or loss of data,
 *  programs or equipment, and unavailability or interruption of operations.
 *
 *  DISCLAIMER OF LIABILITY
 *  NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
 *  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 *  DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
 *  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
 *  TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
 *  USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
 *  HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/

#include "esas2r.h"

static u8 esas2r_vdaioctl_versions[] = {
	ATTO_VDA_VER_UNSUPPORTED,
	ATTO_VDA_FLASH_VER,
	ATTO_VDA_VER_UNSUPPORTED,
	ATTO_VDA_VER_UNSUPPORTED,
	ATTO_VDA_CLI_VER,
	ATTO_VDA_VER_UNSUPPORTED,
	ATTO_VDA_CFG_VER,
	ATTO_VDA_MGT_VER,
	ATTO_VDA_GSV_VER
};

static void clear_vda_request(struct esas2r_request *rq);

static void esas2r_complete_vda_ioctl(struct esas2r_adapter *a,
				      struct esas2r_request *rq);

/* Prepare a VDA IOCTL request to be sent to the firmware. */
bool esas2r_process_vda_ioctl(struct esas2r_adapter *a,
			      struct atto_ioctl_vda *vi,
			      struct esas2r_request *rq,
			      struct esas2r_sg_context *sgc)
{
	u32 datalen = 0;
	struct atto_vda_sge *firstsg = NULL;
	u8 vercnt = (u8)ARRAY_SIZE(esas2r_vdaioctl_versions);

	vi->status = ATTO_STS_SUCCESS;
	vi->vda_status = RS_PENDING;

	if (vi->function >= vercnt) {
		vi->status = ATTO_STS_INV_FUNC;
		return false;
	}

	if (vi->version > esas2r_vdaioctl_versions[vi->function]) {
		vi->status = ATTO_STS_INV_VERSION;
		return false;
	}

	if (test_bit(AF_DEGRADED_MODE, &a->flags)) {
		vi->status = ATTO_STS_DEGRADED;
		return false;
	}

	if (vi->function != VDA_FUNC_SCSI)
		clear_vda_request(rq);

	rq->vrq->scsi.function = vi->function;
	rq->interrupt_cb = esas2r_complete_vda_ioctl;
	rq->interrupt_cx = vi;

	switch (vi->function) {
	case VDA_FUNC_FLASH:

		if (vi->cmd.flash.sub_func != VDA_FLASH_FREAD
		    && vi->cmd.flash.sub_func != VDA_FLASH_FWRITE
		    && vi->cmd.flash.sub_func != VDA_FLASH_FINFO) {
			vi->status = ATTO_STS_INV_FUNC;
			return false;
		}

		if (vi->cmd.flash.sub_func != VDA_FLASH_FINFO)
			datalen = vi->data_length;

		rq->vrq->flash.length = cpu_to_le32(datalen);
		rq->vrq->flash.sub_func = vi->cmd.flash.sub_func;

		memcpy(rq->vrq->flash.data.file.file_name,
		       vi->cmd.flash.data.file.file_name,
		       sizeof(vi->cmd.flash.data.file.file_name));

		firstsg = rq->vrq->flash.data.file.sge;
		break;

	case VDA_FUNC_CLI:

		datalen = vi->data_length;

		rq->vrq->cli.cmd_rsp_len =
			cpu_to_le32(vi->cmd.cli.cmd_rsp_len);
		rq->vrq->cli.length = cpu_to_le32(datalen);

		firstsg = rq->vrq->cli.sge;
		break;

	case VDA_FUNC_MGT:
	{
		u8 *cmdcurr_offset = sgc->cur_offset
				     - offsetof(struct atto_ioctl_vda, data)
				     + offsetof(struct atto_ioctl_vda, cmd)
				     + offsetof(struct atto_ioctl_vda_mgt_cmd,
						data);
		/*
		 * build the data payload SGL here first since
		 * esas2r_sgc_init() will modify the S/G list offset for the
		 * management SGL (which is built below where the data SGL is
		 * usually built).
		 */

		if (vi->data_length) {
			u32 payldlen = 0;

			if (vi->cmd.mgt.mgt_func == VDAMGT_DEV_HEALTH_REQ
			    || vi->cmd.mgt.mgt_func == VDAMGT_DEV_METRICS) {
				rq->vrq->mgt.payld_sglst_offset =
					(u8)offsetof(struct atto_vda_mgmt_req,
						     payld_sge);

				payldlen = vi->data_length;
				datalen = vi->cmd.mgt.data_length;
			} else if (vi->cmd.mgt.mgt_func == VDAMGT_DEV_INFO2
				   || vi->cmd.mgt.mgt_func ==
				   VDAMGT_DEV_INFO2_BYADDR) {
				datalen = vi->data_length;
				cmdcurr_offset = sgc->cur_offset;
			} else {
				vi->status = ATTO_STS_INV_PARAM;
				return false;
			}

			/* Setup the length so building the payload SGL works */
			rq->vrq->mgt.length = cpu_to_le32(datalen);

			if (payldlen) {
				rq->vrq->mgt.payld_length =
					cpu_to_le32(payldlen);

				esas2r_sgc_init(sgc, a, rq,
						rq->vrq->mgt.payld_sge);
				sgc->length = payldlen;

				if (!esas2r_build_sg_list(a, rq, sgc)) {
					vi->status = ATTO_STS_OUT_OF_RSRC;
					return false;
				}
			}
		} else {
			datalen = vi->cmd.mgt.data_length;

			rq->vrq->mgt.length = cpu_to_le32(datalen);
		}

		/*
		 * Now that the payload SGL is built, if any, setup to build
		 * the management SGL.
		 */
		firstsg = rq->vrq->mgt.sge;
		sgc->cur_offset = cmdcurr_offset;

		/* Finish initializing the management request. */
		rq->vrq->mgt.mgt_func = vi->cmd.mgt.mgt_func;
		rq->vrq->mgt.scan_generation = vi->cmd.mgt.scan_generation;
		rq->vrq->mgt.dev_index =
			cpu_to_le32(vi->cmd.mgt.dev_index);

		esas2r_nuxi_mgt_data(rq->vrq->mgt.mgt_func, &vi->cmd.mgt.data);
		break;
	}

	case VDA_FUNC_CFG:

		if (vi->data_length
		    || vi->cmd.cfg.data_length == 0) {
			vi->status = ATTO_STS_INV_PARAM;
			return false;
		}

		if (vi->cmd.cfg.cfg_func == VDA_CFG_INIT) {
			vi->status = ATTO_STS_INV_FUNC;
			return false;
		}

		rq->vrq->cfg.sub_func = vi->cmd.cfg.cfg_func;
		rq->vrq->cfg.length = cpu_to_le32(vi->cmd.cfg.data_length);

		if (vi->cmd.cfg.cfg_func == VDA_CFG_GET_INIT) {
			memcpy(&rq->vrq->cfg.data,
			       &vi->cmd.cfg.data,
			       vi->cmd.cfg.data_length);

			esas2r_nuxi_cfg_data(rq->vrq->cfg.sub_func,
					     &rq->vrq->cfg.data);
		} else {
			vi->status = ATTO_STS_INV_FUNC;

			return false;
		}

		break;

	case VDA_FUNC_GSV:

		vi->cmd.gsv.rsp_len = vercnt;

		memcpy(vi->cmd.gsv.version_info, esas2r_vdaioctl_versions,
		       vercnt);

		vi->vda_status = RS_SUCCESS;
		break;

	default:

		vi->status = ATTO_STS_INV_FUNC;
		return false;
	}

	if (datalen) {
		esas2r_sgc_init(sgc, a, rq, firstsg);
		sgc->length = datalen;

		if (!esas2r_build_sg_list(a, rq, sgc)) {
			vi->status = ATTO_STS_OUT_OF_RSRC;
			return false;
		}
	}

	esas2r_start_request(a, rq);

	return true;
}

static void esas2r_complete_vda_ioctl(struct esas2r_adapter *a,
				      struct esas2r_request *rq)
{
	struct atto_ioctl_vda *vi = (struct atto_ioctl_vda *)rq->interrupt_cx;

	vi->vda_status = rq->req_stat;

	switch (vi->function) {
	case VDA_FUNC_FLASH:

		if (vi->cmd.flash.sub_func == VDA_FLASH_FINFO
		    || vi->cmd.flash.sub_func == VDA_FLASH_FREAD)
			vi->cmd.flash.data.file.file_size =
				le32_to_cpu(rq->func_rsp.flash_rsp.file_size);

		break;

	case VDA_FUNC_MGT:

		vi->cmd.mgt.scan_generation =
			rq->func_rsp.mgt_rsp.scan_generation;
		vi->cmd.mgt.dev_index = le16_to_cpu(
			rq->func_rsp.mgt_rsp.dev_index);

		if (vi->data_length == 0)
			vi->cmd.mgt.data_length =
				le32_to_cpu(rq->func_rsp.mgt_rsp.length);

		esas2r_nuxi_mgt_data(rq->vrq->mgt.mgt_func, &vi->cmd.mgt.data);
		break;

	case VDA_FUNC_CFG:

		if (vi->cmd.cfg.cfg_func == VDA_CFG_GET_INIT) {
			struct atto_ioctl_vda_cfg_cmd *cfg = &vi->cmd.cfg;
			struct atto_vda_cfg_rsp *rsp = &rq->func_rsp.cfg_rsp;
			char buf[sizeof(cfg->data.init.fw_release) + 1];

			cfg->data_length =
				cpu_to_le32(sizeof(struct atto_vda_cfg_init));
			cfg->data.init.vda_version =
				le32_to_cpu(rsp->vda_version);
			cfg->data.init.fw_build = rsp->fw_build;

			snprintf(buf, sizeof(buf), "%1.1u.%2.2u",
				 (int)LOBYTE(le16_to_cpu(rsp->fw_release)),
				 (int)HIBYTE(le16_to_cpu(rsp->fw_release)));

			memcpy(&cfg->data.init.fw_release, buf,
			       sizeof(cfg->data.init.fw_release));

			if (LOWORD(LOBYTE(cfg->data.init.fw_build)) == 'A')
				cfg->data.init.fw_version =
					cfg->data.init.fw_build;
			else
				cfg->data.init.fw_version =
					cfg->data.init.fw_release;
		} else {
			esas2r_nuxi_cfg_data(rq->vrq->cfg.sub_func,
					     &vi->cmd.cfg.data);
		}

		break;

	case VDA_FUNC_CLI:

		vi->cmd.cli.cmd_rsp_len =
			le32_to_cpu(rq->func_rsp.cli_rsp.cmd_rsp_len);
		break;

	default:

		break;
	}
}

/* Build a flash VDA request. */
void esas2r_build_flash_req(struct esas2r_adapter *a,
			    struct esas2r_request *rq,
			    u8 sub_func,
			    u8 cksum,
			    u32 addr,
			    u32 length)
{
	struct atto_vda_flash_req *vrq = &rq->vrq->flash;

	clear_vda_request(rq);

	rq->vrq->scsi.function = VDA_FUNC_FLASH;

	if (sub_func == VDA_FLASH_BEGINW
	    || sub_func == VDA_FLASH_WRITE
	    || sub_func == VDA_FLASH_READ)
		vrq->sg_list_offset = (u8)offsetof(struct atto_vda_flash_req,
						   data.sge);

	vrq->length = cpu_to_le32(length);
	vrq->flash_addr = cpu_to_le32(addr);
	vrq->checksum = cksum;
	vrq->sub_func = sub_func;
}

/* Build a VDA management request. */
void esas2r_build_mgt_req(struct esas2r_adapter *a,
			  struct esas2r_request *rq,
			  u8 sub_func,
			  u8 scan_gen,
			  u16 dev_index,
			  u32 length,
			  void *data)
{
	struct atto_vda_mgmt_req *vrq = &rq->vrq->mgt;

	clear_vda_request(rq);

	rq->vrq->scsi.function = VDA_FUNC_MGT;

	vrq->mgt_func = sub_func;
	vrq->scan_generation = scan_gen;
	vrq->dev_index = cpu_to_le16(dev_index);
	vrq->length = cpu_to_le32(length);

	if (vrq->length) {
		if (test_bit(AF_LEGACY_SGE_MODE, &a->flags)) {
			vrq->sg_list_offset = (u8)offsetof(
				struct atto_vda_mgmt_req, sge);

			vrq->sge[0].length = cpu_to_le32(SGE_LAST | length);
			vrq->sge[0].address = cpu_to_le64(
				rq->vrq_md->phys_addr +
				sizeof(union atto_vda_req));
		} else {
			vrq->sg_list_offset = (u8)offsetof(
				struct atto_vda_mgmt_req, prde);

			vrq->prde[0].ctl_len = cpu_to_le32(length);
			vrq->prde[0].address = cpu_to_le64(
				rq->vrq_md->phys_addr +
				sizeof(union atto_vda_req));
		}
	}

	if (data) {
		esas2r_nuxi_mgt_data(sub_func, data);

		memcpy(&rq->vda_rsp_data->mgt_data.data.bytes[0], data,
		       length);
	}
}

/* Build a VDA asyncronous event (AE) request. */
void esas2r_build_ae_req(struct esas2r_adapter *a, struct esas2r_request *rq)
{
	struct atto_vda_ae_req *vrq = &rq->vrq->ae;

	clear_vda_request(rq);

	rq->vrq->scsi.function = VDA_FUNC_AE;

	vrq->length = cpu_to_le32(sizeof(struct atto_vda_ae_data));

	if (test_bit(AF_LEGACY_SGE_MODE, &a->flags)) {
		vrq->sg_list_offset =
			(u8)offsetof(struct atto_vda_ae_req, sge);
		vrq->sge[0].length = cpu_to_le32(SGE_LAST | vrq->length);
		vrq->sge[0].address = cpu_to_le64(
			rq->vrq_md->phys_addr +
			sizeof(union atto_vda_req));
	} else {
		vrq->sg_list_offset = (u8)offsetof(struct atto_vda_ae_req,
						   prde);
		vrq->prde[0].ctl_len = cpu_to_le32(vrq->length);
		vrq->prde[0].address = cpu_to_le64(
			rq->vrq_md->phys_addr +
			sizeof(union atto_vda_req));
	}
}

/* Build a VDA CLI request. */
void esas2r_build_cli_req(struct esas2r_adapter *a,
			  struct esas2r_request *rq,
			  u32 length,
			  u32 cmd_rsp_len)
{
	struct atto_vda_cli_req *vrq = &rq->vrq->cli;

	clear_vda_request(rq);

	rq->vrq->scsi.function = VDA_FUNC_CLI;

	vrq->length = cpu_to_le32(length);
	vrq->cmd_rsp_len = cpu_to_le32(cmd_rsp_len);
	vrq->sg_list_offset = (u8)offsetof(struct atto_vda_cli_req, sge);
}

/* Build a VDA IOCTL request. */
void esas2r_build_ioctl_req(struct esas2r_adapter *a,
			    struct esas2r_request *rq,
			    u32 length,
			    u8 sub_func)
{
	struct atto_vda_ioctl_req *vrq = &rq->vrq->ioctl;

	clear_vda_request(rq);

	rq->vrq->scsi.function = VDA_FUNC_IOCTL;

	vrq->length = cpu_to_le32(length);
	vrq->sub_func = sub_func;
	vrq->sg_list_offset = (u8)offsetof(struct atto_vda_ioctl_req, sge);
}

/* Build a VDA configuration request. */
void esas2r_build_cfg_req(struct esas2r_adapter *a,
			  struct esas2r_request *rq,
			  u8 sub_func,
			  u32 length,
			  void *data)
{
	struct atto_vda_cfg_req *vrq = &rq->vrq->cfg;

	clear_vda_request(rq);

	rq->vrq->scsi.function = VDA_FUNC_CFG;

	vrq->sub_func = sub_func;
	vrq->length = cpu_to_le32(length);

	if (data) {
		esas2r_nuxi_cfg_data(sub_func, data);

		memcpy(&vrq->data, data, length);
	}
}

static void clear_vda_request(struct esas2r_request *rq)
{
	u32 handle = rq->vrq->scsi.handle;

	memset(rq->vrq, 0, sizeof(*rq->vrq));

	rq->vrq->scsi.handle = handle;

	rq->req_stat = RS_PENDING;

	/* since the data buffer is separate clear that too */

	memset(rq->data_buf, 0, ESAS2R_DATA_BUF_LEN);

	/*
	 * Setup next and prev pointer in case the request is not going through
	 * esas2r_start_request().
	 */

	INIT_LIST_HEAD(&rq->req_list);
}
OpenPOWER on IntegriCloud