James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Aic94xx SAS/SATA Tasks |
| 3 | * |
| 4 | * Copyright (C) 2005 Adaptec, Inc. All rights reserved. |
| 5 | * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com> |
| 6 | * |
| 7 | * This file is licensed under GPLv2. |
| 8 | * |
| 9 | * This file is part of the aic94xx driver. |
| 10 | * |
| 11 | * The aic94xx driver is free software; you can redistribute it and/or |
| 12 | * modify it under the terms of the GNU General Public License as |
| 13 | * published by the Free Software Foundation; version 2 of the |
| 14 | * License. |
| 15 | * |
| 16 | * The aic94xx driver is distributed in the hope that it will be useful, |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 19 | * General Public License for more details. |
| 20 | * |
| 21 | * You should have received a copy of the GNU General Public License |
| 22 | * along with the aic94xx driver; if not, write to the Free Software |
| 23 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 24 | * |
| 25 | */ |
| 26 | |
| 27 | #include <linux/spinlock.h> |
| 28 | #include "aic94xx.h" |
| 29 | #include "aic94xx_sas.h" |
| 30 | #include "aic94xx_hwi.h" |
| 31 | |
| 32 | static void asd_unbuild_ata_ascb(struct asd_ascb *a); |
| 33 | static void asd_unbuild_smp_ascb(struct asd_ascb *a); |
| 34 | static void asd_unbuild_ssp_ascb(struct asd_ascb *a); |
| 35 | |
| 36 | static inline void asd_can_dequeue(struct asd_ha_struct *asd_ha, int num) |
| 37 | { |
| 38 | unsigned long flags; |
| 39 | |
| 40 | spin_lock_irqsave(&asd_ha->seq.pend_q_lock, flags); |
| 41 | asd_ha->seq.can_queue += num; |
| 42 | spin_unlock_irqrestore(&asd_ha->seq.pend_q_lock, flags); |
| 43 | } |
| 44 | |
| 45 | /* PCI_DMA_... to our direction translation. |
| 46 | */ |
| 47 | static const u8 data_dir_flags[] = { |
| 48 | [PCI_DMA_BIDIRECTIONAL] = DATA_DIR_BYRECIPIENT, /* UNSPECIFIED */ |
| 49 | [PCI_DMA_TODEVICE] = DATA_DIR_OUT, /* OUTBOUND */ |
| 50 | [PCI_DMA_FROMDEVICE] = DATA_DIR_IN, /* INBOUND */ |
| 51 | [PCI_DMA_NONE] = DATA_DIR_NONE, /* NO TRANSFER */ |
| 52 | }; |
| 53 | |
| 54 | static inline int asd_map_scatterlist(struct sas_task *task, |
| 55 | struct sg_el *sg_arr, |
Al Viro | 3cc2754 | 2006-09-25 02:55:40 +0100 | [diff] [blame] | 56 | gfp_t gfp_flags) |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 57 | { |
| 58 | struct asd_ascb *ascb = task->lldd_task; |
| 59 | struct asd_ha_struct *asd_ha = ascb->ha; |
| 60 | struct scatterlist *sc; |
| 61 | int num_sg, res; |
| 62 | |
| 63 | if (task->data_dir == PCI_DMA_NONE) |
| 64 | return 0; |
| 65 | |
| 66 | if (task->num_scatter == 0) { |
| 67 | void *p = task->scatter; |
| 68 | dma_addr_t dma = pci_map_single(asd_ha->pcidev, p, |
| 69 | task->total_xfer_len, |
| 70 | task->data_dir); |
| 71 | sg_arr[0].bus_addr = cpu_to_le64((u64)dma); |
| 72 | sg_arr[0].size = cpu_to_le32(task->total_xfer_len); |
| 73 | sg_arr[0].flags |= ASD_SG_EL_LIST_EOL; |
| 74 | return 0; |
| 75 | } |
| 76 | |
Darrick J. Wong | ba330ff | 2006-11-10 16:59:24 -0800 | [diff] [blame] | 77 | /* STP tasks come from libata which has already mapped |
| 78 | * the SG list */ |
James Bottomley | 0f05df8b | 2007-07-16 13:41:04 -0500 | [diff] [blame] | 79 | if (sas_protocol_ata(task->task_proto)) |
Darrick J. Wong | ba330ff | 2006-11-10 16:59:24 -0800 | [diff] [blame] | 80 | num_sg = task->num_scatter; |
| 81 | else |
| 82 | num_sg = pci_map_sg(asd_ha->pcidev, task->scatter, |
| 83 | task->num_scatter, task->data_dir); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 84 | if (num_sg == 0) |
| 85 | return -ENOMEM; |
| 86 | |
| 87 | if (num_sg > 3) { |
| 88 | int i; |
| 89 | |
| 90 | ascb->sg_arr = asd_alloc_coherent(asd_ha, |
| 91 | num_sg*sizeof(struct sg_el), |
| 92 | gfp_flags); |
| 93 | if (!ascb->sg_arr) { |
| 94 | res = -ENOMEM; |
| 95 | goto err_unmap; |
| 96 | } |
| 97 | for (sc = task->scatter, i = 0; i < num_sg; i++, sc++) { |
| 98 | struct sg_el *sg = |
| 99 | &((struct sg_el *)ascb->sg_arr->vaddr)[i]; |
| 100 | sg->bus_addr = cpu_to_le64((u64)sg_dma_address(sc)); |
| 101 | sg->size = cpu_to_le32((u32)sg_dma_len(sc)); |
| 102 | if (i == num_sg-1) |
| 103 | sg->flags |= ASD_SG_EL_LIST_EOL; |
| 104 | } |
| 105 | |
| 106 | for (sc = task->scatter, i = 0; i < 2; i++, sc++) { |
| 107 | sg_arr[i].bus_addr = |
| 108 | cpu_to_le64((u64)sg_dma_address(sc)); |
| 109 | sg_arr[i].size = cpu_to_le32((u32)sg_dma_len(sc)); |
| 110 | } |
| 111 | sg_arr[1].next_sg_offs = 2 * sizeof(*sg_arr); |
| 112 | sg_arr[1].flags |= ASD_SG_EL_LIST_EOS; |
| 113 | |
| 114 | memset(&sg_arr[2], 0, sizeof(*sg_arr)); |
| 115 | sg_arr[2].bus_addr=cpu_to_le64((u64)ascb->sg_arr->dma_handle); |
| 116 | } else { |
| 117 | int i; |
| 118 | for (sc = task->scatter, i = 0; i < num_sg; i++, sc++) { |
| 119 | sg_arr[i].bus_addr = |
| 120 | cpu_to_le64((u64)sg_dma_address(sc)); |
| 121 | sg_arr[i].size = cpu_to_le32((u32)sg_dma_len(sc)); |
| 122 | } |
| 123 | sg_arr[i-1].flags |= ASD_SG_EL_LIST_EOL; |
| 124 | } |
| 125 | |
| 126 | return 0; |
| 127 | err_unmap: |
James Bottomley | 0f05df8b | 2007-07-16 13:41:04 -0500 | [diff] [blame] | 128 | if (sas_protocol_ata(task->task_proto)) |
Darrick J. Wong | ba330ff | 2006-11-10 16:59:24 -0800 | [diff] [blame] | 129 | pci_unmap_sg(asd_ha->pcidev, task->scatter, task->num_scatter, |
| 130 | task->data_dir); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 131 | return res; |
| 132 | } |
| 133 | |
| 134 | static inline void asd_unmap_scatterlist(struct asd_ascb *ascb) |
| 135 | { |
| 136 | struct asd_ha_struct *asd_ha = ascb->ha; |
| 137 | struct sas_task *task = ascb->uldd_task; |
| 138 | |
| 139 | if (task->data_dir == PCI_DMA_NONE) |
| 140 | return; |
| 141 | |
| 142 | if (task->num_scatter == 0) { |
| 143 | dma_addr_t dma = (dma_addr_t) |
| 144 | le64_to_cpu(ascb->scb->ssp_task.sg_element[0].bus_addr); |
| 145 | pci_unmap_single(ascb->ha->pcidev, dma, task->total_xfer_len, |
| 146 | task->data_dir); |
| 147 | return; |
| 148 | } |
| 149 | |
| 150 | asd_free_coherent(asd_ha, ascb->sg_arr); |
Darrick J. Wong | ba330ff | 2006-11-10 16:59:24 -0800 | [diff] [blame] | 151 | if (task->task_proto != SAS_PROTOCOL_STP) |
| 152 | pci_unmap_sg(asd_ha->pcidev, task->scatter, task->num_scatter, |
| 153 | task->data_dir); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 154 | } |
| 155 | |
| 156 | /* ---------- Task complete tasklet ---------- */ |
| 157 | |
| 158 | static void asd_get_response_tasklet(struct asd_ascb *ascb, |
| 159 | struct done_list_struct *dl) |
| 160 | { |
| 161 | struct asd_ha_struct *asd_ha = ascb->ha; |
| 162 | struct sas_task *task = ascb->uldd_task; |
| 163 | struct task_status_struct *ts = &task->task_status; |
| 164 | unsigned long flags; |
| 165 | struct tc_resp_sb_struct { |
| 166 | __le16 index_escb; |
| 167 | u8 len_lsb; |
| 168 | u8 flags; |
| 169 | } __attribute__ ((packed)) *resp_sb = (void *) dl->status_block; |
| 170 | |
| 171 | /* int size = ((resp_sb->flags & 7) << 8) | resp_sb->len_lsb; */ |
| 172 | int edb_id = ((resp_sb->flags & 0x70) >> 4)-1; |
| 173 | struct asd_ascb *escb; |
| 174 | struct asd_dma_tok *edb; |
| 175 | void *r; |
| 176 | |
| 177 | spin_lock_irqsave(&asd_ha->seq.tc_index_lock, flags); |
| 178 | escb = asd_tc_index_find(&asd_ha->seq, |
| 179 | (int)le16_to_cpu(resp_sb->index_escb)); |
| 180 | spin_unlock_irqrestore(&asd_ha->seq.tc_index_lock, flags); |
| 181 | |
| 182 | if (!escb) { |
| 183 | ASD_DPRINTK("Uh-oh! No escb for this dl?!\n"); |
| 184 | return; |
| 185 | } |
| 186 | |
| 187 | ts->buf_valid_size = 0; |
| 188 | edb = asd_ha->seq.edb_arr[edb_id + escb->edb_index]; |
| 189 | r = edb->vaddr; |
| 190 | if (task->task_proto == SAS_PROTO_SSP) { |
| 191 | struct ssp_response_iu *iu = |
| 192 | r + 16 + sizeof(struct ssp_frame_hdr); |
| 193 | |
| 194 | ts->residual = le32_to_cpu(*(__le32 *)r); |
| 195 | ts->resp = SAS_TASK_COMPLETE; |
| 196 | if (iu->datapres == 0) |
| 197 | ts->stat = iu->status; |
| 198 | else if (iu->datapres == 1) |
| 199 | ts->stat = iu->resp_data[3]; |
| 200 | else if (iu->datapres == 2) { |
| 201 | ts->stat = SAM_CHECK_COND; |
| 202 | ts->buf_valid_size = min((u32) SAS_STATUS_BUF_SIZE, |
| 203 | be32_to_cpu(iu->sense_data_len)); |
| 204 | memcpy(ts->buf, iu->sense_data, ts->buf_valid_size); |
| 205 | if (iu->status != SAM_CHECK_COND) { |
| 206 | ASD_DPRINTK("device %llx sent sense data, but " |
| 207 | "stat(0x%x) is not CHECK_CONDITION" |
| 208 | "\n", |
| 209 | SAS_ADDR(task->dev->sas_addr), |
| 210 | ts->stat); |
| 211 | } |
| 212 | } |
| 213 | } else { |
| 214 | struct ata_task_resp *resp = (void *) &ts->buf[0]; |
| 215 | |
| 216 | ts->residual = le32_to_cpu(*(__le32 *)r); |
| 217 | |
| 218 | if (SAS_STATUS_BUF_SIZE >= sizeof(*resp)) { |
| 219 | resp->frame_len = le16_to_cpu(*(__le16 *)(r+6)); |
| 220 | memcpy(&resp->ending_fis[0], r+16, 24); |
| 221 | ts->buf_valid_size = sizeof(*resp); |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | asd_invalidate_edb(escb, edb_id); |
| 226 | } |
| 227 | |
| 228 | static void asd_task_tasklet_complete(struct asd_ascb *ascb, |
| 229 | struct done_list_struct *dl) |
| 230 | { |
| 231 | struct sas_task *task = ascb->uldd_task; |
| 232 | struct task_status_struct *ts = &task->task_status; |
| 233 | unsigned long flags; |
| 234 | u8 opcode = dl->opcode; |
| 235 | |
| 236 | asd_can_dequeue(ascb->ha, 1); |
| 237 | |
| 238 | Again: |
| 239 | switch (opcode) { |
| 240 | case TC_NO_ERROR: |
| 241 | ts->resp = SAS_TASK_COMPLETE; |
| 242 | ts->stat = SAM_GOOD; |
| 243 | break; |
| 244 | case TC_UNDERRUN: |
| 245 | ts->resp = SAS_TASK_COMPLETE; |
| 246 | ts->stat = SAS_DATA_UNDERRUN; |
| 247 | ts->residual = le32_to_cpu(*(__le32 *)dl->status_block); |
| 248 | break; |
| 249 | case TC_OVERRUN: |
| 250 | ts->resp = SAS_TASK_COMPLETE; |
| 251 | ts->stat = SAS_DATA_OVERRUN; |
| 252 | ts->residual = 0; |
| 253 | break; |
| 254 | case TC_SSP_RESP: |
| 255 | case TC_ATA_RESP: |
| 256 | ts->resp = SAS_TASK_COMPLETE; |
| 257 | ts->stat = SAS_PROTO_RESPONSE; |
| 258 | asd_get_response_tasklet(ascb, dl); |
| 259 | break; |
| 260 | case TF_OPEN_REJECT: |
| 261 | ts->resp = SAS_TASK_UNDELIVERED; |
| 262 | ts->stat = SAS_OPEN_REJECT; |
| 263 | if (dl->status_block[1] & 2) |
| 264 | ts->open_rej_reason = 1 + dl->status_block[2]; |
| 265 | else if (dl->status_block[1] & 1) |
| 266 | ts->open_rej_reason = (dl->status_block[2] >> 4)+10; |
| 267 | else |
| 268 | ts->open_rej_reason = SAS_OREJ_UNKNOWN; |
| 269 | break; |
| 270 | case TF_OPEN_TO: |
| 271 | ts->resp = SAS_TASK_UNDELIVERED; |
| 272 | ts->stat = SAS_OPEN_TO; |
| 273 | break; |
| 274 | case TF_PHY_DOWN: |
| 275 | case TU_PHY_DOWN: |
| 276 | ts->resp = SAS_TASK_UNDELIVERED; |
| 277 | ts->stat = SAS_PHY_DOWN; |
| 278 | break; |
| 279 | case TI_PHY_DOWN: |
| 280 | ts->resp = SAS_TASK_COMPLETE; |
| 281 | ts->stat = SAS_PHY_DOWN; |
| 282 | break; |
| 283 | case TI_BREAK: |
| 284 | case TI_PROTO_ERR: |
| 285 | case TI_NAK: |
| 286 | case TI_ACK_NAK_TO: |
| 287 | case TF_SMP_XMIT_RCV_ERR: |
| 288 | case TC_ATA_R_ERR_RECV: |
| 289 | ts->resp = SAS_TASK_COMPLETE; |
| 290 | ts->stat = SAS_INTERRUPTED; |
| 291 | break; |
| 292 | case TF_BREAK: |
| 293 | case TU_BREAK: |
| 294 | case TU_ACK_NAK_TO: |
| 295 | case TF_SMPRSP_TO: |
| 296 | ts->resp = SAS_TASK_UNDELIVERED; |
| 297 | ts->stat = SAS_DEV_NO_RESPONSE; |
| 298 | break; |
| 299 | case TF_NAK_RECV: |
| 300 | ts->resp = SAS_TASK_COMPLETE; |
| 301 | ts->stat = SAS_NAK_R_ERR; |
| 302 | break; |
| 303 | case TA_I_T_NEXUS_LOSS: |
| 304 | opcode = dl->status_block[0]; |
| 305 | goto Again; |
| 306 | break; |
| 307 | case TF_INV_CONN_HANDLE: |
| 308 | ts->resp = SAS_TASK_UNDELIVERED; |
| 309 | ts->stat = SAS_DEVICE_UNKNOWN; |
| 310 | break; |
| 311 | case TF_REQUESTED_N_PENDING: |
| 312 | ts->resp = SAS_TASK_UNDELIVERED; |
| 313 | ts->stat = SAS_PENDING; |
| 314 | break; |
| 315 | case TC_TASK_CLEARED: |
| 316 | case TA_ON_REQ: |
| 317 | ts->resp = SAS_TASK_COMPLETE; |
| 318 | ts->stat = SAS_ABORTED_TASK; |
| 319 | break; |
| 320 | |
| 321 | case TF_NO_SMP_CONN: |
| 322 | case TF_TMF_NO_CTX: |
| 323 | case TF_TMF_NO_TAG: |
| 324 | case TF_TMF_TAG_FREE: |
| 325 | case TF_TMF_TASK_DONE: |
| 326 | case TF_TMF_NO_CONN_HANDLE: |
| 327 | case TF_IRTT_TO: |
| 328 | case TF_IU_SHORT: |
| 329 | case TF_DATA_OFFS_ERR: |
| 330 | ts->resp = SAS_TASK_UNDELIVERED; |
| 331 | ts->stat = SAS_DEV_NO_RESPONSE; |
| 332 | break; |
| 333 | |
| 334 | case TC_LINK_ADM_RESP: |
| 335 | case TC_CONTROL_PHY: |
| 336 | case TC_RESUME: |
| 337 | case TC_PARTIAL_SG_LIST: |
| 338 | default: |
| 339 | ASD_DPRINTK("%s: dl opcode: 0x%x?\n", __FUNCTION__, opcode); |
| 340 | break; |
| 341 | } |
| 342 | |
| 343 | switch (task->task_proto) { |
| 344 | case SATA_PROTO: |
| 345 | case SAS_PROTO_STP: |
| 346 | asd_unbuild_ata_ascb(ascb); |
| 347 | break; |
| 348 | case SAS_PROTO_SMP: |
| 349 | asd_unbuild_smp_ascb(ascb); |
| 350 | break; |
| 351 | case SAS_PROTO_SSP: |
| 352 | asd_unbuild_ssp_ascb(ascb); |
| 353 | default: |
| 354 | break; |
| 355 | } |
| 356 | |
| 357 | spin_lock_irqsave(&task->task_state_lock, flags); |
| 358 | task->task_state_flags &= ~SAS_TASK_STATE_PENDING; |
Darrick J. Wong | b218a0d | 2007-01-11 14:14:55 -0800 | [diff] [blame] | 359 | task->task_state_flags &= ~SAS_TASK_AT_INITIATOR; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 360 | task->task_state_flags |= SAS_TASK_STATE_DONE; |
| 361 | if (unlikely((task->task_state_flags & SAS_TASK_STATE_ABORTED))) { |
| 362 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
| 363 | ASD_DPRINTK("task 0x%p done with opcode 0x%x resp 0x%x " |
| 364 | "stat 0x%x but aborted by upper layer!\n", |
| 365 | task, opcode, ts->resp, ts->stat); |
| 366 | complete(&ascb->completion); |
| 367 | } else { |
| 368 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
| 369 | task->lldd_task = NULL; |
| 370 | asd_ascb_free(ascb); |
| 371 | mb(); |
| 372 | task->task_done(task); |
| 373 | } |
| 374 | } |
| 375 | |
| 376 | /* ---------- ATA ---------- */ |
| 377 | |
| 378 | static int asd_build_ata_ascb(struct asd_ascb *ascb, struct sas_task *task, |
Al Viro | 3cc2754 | 2006-09-25 02:55:40 +0100 | [diff] [blame] | 379 | gfp_t gfp_flags) |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 380 | { |
| 381 | struct domain_device *dev = task->dev; |
| 382 | struct scb *scb; |
| 383 | u8 flags; |
| 384 | int res = 0; |
| 385 | |
| 386 | scb = ascb->scb; |
| 387 | |
| 388 | if (unlikely(task->ata_task.device_control_reg_update)) |
| 389 | scb->header.opcode = CONTROL_ATA_DEV; |
| 390 | else if (dev->sata_dev.command_set == ATA_COMMAND_SET) |
| 391 | scb->header.opcode = INITIATE_ATA_TASK; |
| 392 | else |
| 393 | scb->header.opcode = INITIATE_ATAPI_TASK; |
| 394 | |
| 395 | scb->ata_task.proto_conn_rate = (1 << 5); /* STP */ |
| 396 | if (dev->port->oob_mode == SAS_OOB_MODE) |
| 397 | scb->ata_task.proto_conn_rate |= dev->linkrate; |
| 398 | |
| 399 | scb->ata_task.total_xfer_len = cpu_to_le32(task->total_xfer_len); |
| 400 | scb->ata_task.fis = task->ata_task.fis; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 401 | if (likely(!task->ata_task.device_control_reg_update)) |
| 402 | scb->ata_task.fis.flags |= 0x80; /* C=1: update ATA cmd reg */ |
| 403 | scb->ata_task.fis.flags &= 0xF0; /* PM_PORT field shall be 0 */ |
| 404 | if (dev->sata_dev.command_set == ATAPI_COMMAND_SET) |
| 405 | memcpy(scb->ata_task.atapi_packet, task->ata_task.atapi_packet, |
| 406 | 16); |
| 407 | scb->ata_task.sister_scb = cpu_to_le16(0xFFFF); |
| 408 | scb->ata_task.conn_handle = cpu_to_le16( |
| 409 | (u16)(unsigned long)dev->lldd_dev); |
| 410 | |
| 411 | if (likely(!task->ata_task.device_control_reg_update)) { |
| 412 | flags = 0; |
| 413 | if (task->ata_task.dma_xfer) |
| 414 | flags |= DATA_XFER_MODE_DMA; |
| 415 | if (task->ata_task.use_ncq && |
| 416 | dev->sata_dev.command_set != ATAPI_COMMAND_SET) |
| 417 | flags |= ATA_Q_TYPE_NCQ; |
| 418 | flags |= data_dir_flags[task->data_dir]; |
| 419 | scb->ata_task.ata_flags = flags; |
| 420 | |
| 421 | scb->ata_task.retry_count = task->ata_task.retry_count; |
| 422 | |
| 423 | flags = 0; |
| 424 | if (task->ata_task.set_affil_pol) |
| 425 | flags |= SET_AFFIL_POLICY; |
| 426 | if (task->ata_task.stp_affil_pol) |
| 427 | flags |= STP_AFFIL_POLICY; |
| 428 | scb->ata_task.flags = flags; |
| 429 | } |
| 430 | ascb->tasklet_complete = asd_task_tasklet_complete; |
| 431 | |
| 432 | if (likely(!task->ata_task.device_control_reg_update)) |
| 433 | res = asd_map_scatterlist(task, scb->ata_task.sg_element, |
| 434 | gfp_flags); |
| 435 | |
| 436 | return res; |
| 437 | } |
| 438 | |
| 439 | static void asd_unbuild_ata_ascb(struct asd_ascb *a) |
| 440 | { |
| 441 | asd_unmap_scatterlist(a); |
| 442 | } |
| 443 | |
| 444 | /* ---------- SMP ---------- */ |
| 445 | |
| 446 | static int asd_build_smp_ascb(struct asd_ascb *ascb, struct sas_task *task, |
Al Viro | 3cc2754 | 2006-09-25 02:55:40 +0100 | [diff] [blame] | 447 | gfp_t gfp_flags) |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 448 | { |
| 449 | struct asd_ha_struct *asd_ha = ascb->ha; |
| 450 | struct domain_device *dev = task->dev; |
| 451 | struct scb *scb; |
| 452 | |
| 453 | pci_map_sg(asd_ha->pcidev, &task->smp_task.smp_req, 1, |
Jeff Garzik | d136552 | 2007-10-02 13:16:10 -0400 | [diff] [blame] | 454 | PCI_DMA_TODEVICE); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 455 | pci_map_sg(asd_ha->pcidev, &task->smp_task.smp_resp, 1, |
| 456 | PCI_DMA_FROMDEVICE); |
| 457 | |
| 458 | scb = ascb->scb; |
| 459 | |
| 460 | scb->header.opcode = INITIATE_SMP_TASK; |
| 461 | |
| 462 | scb->smp_task.proto_conn_rate = dev->linkrate; |
| 463 | |
| 464 | scb->smp_task.smp_req.bus_addr = |
| 465 | cpu_to_le64((u64)sg_dma_address(&task->smp_task.smp_req)); |
| 466 | scb->smp_task.smp_req.size = |
| 467 | cpu_to_le32((u32)sg_dma_len(&task->smp_task.smp_req)-4); |
| 468 | |
| 469 | scb->smp_task.smp_resp.bus_addr = |
| 470 | cpu_to_le64((u64)sg_dma_address(&task->smp_task.smp_resp)); |
| 471 | scb->smp_task.smp_resp.size = |
| 472 | cpu_to_le32((u32)sg_dma_len(&task->smp_task.smp_resp)-4); |
| 473 | |
| 474 | scb->smp_task.sister_scb = cpu_to_le16(0xFFFF); |
| 475 | scb->smp_task.conn_handle = cpu_to_le16((u16) |
| 476 | (unsigned long)dev->lldd_dev); |
| 477 | |
| 478 | ascb->tasklet_complete = asd_task_tasklet_complete; |
| 479 | |
| 480 | return 0; |
| 481 | } |
| 482 | |
| 483 | static void asd_unbuild_smp_ascb(struct asd_ascb *a) |
| 484 | { |
| 485 | struct sas_task *task = a->uldd_task; |
| 486 | |
| 487 | BUG_ON(!task); |
| 488 | pci_unmap_sg(a->ha->pcidev, &task->smp_task.smp_req, 1, |
Jeff Garzik | d136552 | 2007-10-02 13:16:10 -0400 | [diff] [blame] | 489 | PCI_DMA_TODEVICE); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 490 | pci_unmap_sg(a->ha->pcidev, &task->smp_task.smp_resp, 1, |
| 491 | PCI_DMA_FROMDEVICE); |
| 492 | } |
| 493 | |
| 494 | /* ---------- SSP ---------- */ |
| 495 | |
| 496 | static int asd_build_ssp_ascb(struct asd_ascb *ascb, struct sas_task *task, |
Al Viro | 3cc2754 | 2006-09-25 02:55:40 +0100 | [diff] [blame] | 497 | gfp_t gfp_flags) |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 498 | { |
| 499 | struct domain_device *dev = task->dev; |
| 500 | struct scb *scb; |
| 501 | int res = 0; |
| 502 | |
| 503 | scb = ascb->scb; |
| 504 | |
| 505 | scb->header.opcode = INITIATE_SSP_TASK; |
| 506 | |
| 507 | scb->ssp_task.proto_conn_rate = (1 << 4); /* SSP */ |
| 508 | scb->ssp_task.proto_conn_rate |= dev->linkrate; |
| 509 | scb->ssp_task.total_xfer_len = cpu_to_le32(task->total_xfer_len); |
| 510 | scb->ssp_task.ssp_frame.frame_type = SSP_DATA; |
| 511 | memcpy(scb->ssp_task.ssp_frame.hashed_dest_addr, dev->hashed_sas_addr, |
| 512 | HASHED_SAS_ADDR_SIZE); |
| 513 | memcpy(scb->ssp_task.ssp_frame.hashed_src_addr, |
| 514 | dev->port->ha->hashed_sas_addr, HASHED_SAS_ADDR_SIZE); |
| 515 | scb->ssp_task.ssp_frame.tptt = cpu_to_be16(0xFFFF); |
| 516 | |
| 517 | memcpy(scb->ssp_task.ssp_cmd.lun, task->ssp_task.LUN, 8); |
| 518 | if (task->ssp_task.enable_first_burst) |
| 519 | scb->ssp_task.ssp_cmd.efb_prio_attr |= EFB_MASK; |
| 520 | scb->ssp_task.ssp_cmd.efb_prio_attr |= (task->ssp_task.task_prio << 3); |
| 521 | scb->ssp_task.ssp_cmd.efb_prio_attr |= (task->ssp_task.task_attr & 7); |
| 522 | memcpy(scb->ssp_task.ssp_cmd.cdb, task->ssp_task.cdb, 16); |
| 523 | |
| 524 | scb->ssp_task.sister_scb = cpu_to_le16(0xFFFF); |
| 525 | scb->ssp_task.conn_handle = cpu_to_le16( |
| 526 | (u16)(unsigned long)dev->lldd_dev); |
| 527 | scb->ssp_task.data_dir = data_dir_flags[task->data_dir]; |
| 528 | scb->ssp_task.retry_count = scb->ssp_task.retry_count; |
| 529 | |
| 530 | ascb->tasklet_complete = asd_task_tasklet_complete; |
| 531 | |
| 532 | res = asd_map_scatterlist(task, scb->ssp_task.sg_element, gfp_flags); |
| 533 | |
| 534 | return res; |
| 535 | } |
| 536 | |
| 537 | static void asd_unbuild_ssp_ascb(struct asd_ascb *a) |
| 538 | { |
| 539 | asd_unmap_scatterlist(a); |
| 540 | } |
| 541 | |
| 542 | /* ---------- Execute Task ---------- */ |
| 543 | |
| 544 | static inline int asd_can_queue(struct asd_ha_struct *asd_ha, int num) |
| 545 | { |
| 546 | int res = 0; |
| 547 | unsigned long flags; |
| 548 | |
| 549 | spin_lock_irqsave(&asd_ha->seq.pend_q_lock, flags); |
| 550 | if ((asd_ha->seq.can_queue - num) < 0) |
| 551 | res = -SAS_QUEUE_FULL; |
| 552 | else |
| 553 | asd_ha->seq.can_queue -= num; |
| 554 | spin_unlock_irqrestore(&asd_ha->seq.pend_q_lock, flags); |
| 555 | |
| 556 | return res; |
| 557 | } |
| 558 | |
| 559 | int asd_execute_task(struct sas_task *task, const int num, |
Al Viro | 3cc2754 | 2006-09-25 02:55:40 +0100 | [diff] [blame] | 560 | gfp_t gfp_flags) |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 561 | { |
| 562 | int res = 0; |
| 563 | LIST_HEAD(alist); |
| 564 | struct sas_task *t = task; |
| 565 | struct asd_ascb *ascb = NULL, *a; |
| 566 | struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha; |
Darrick J. Wong | b218a0d | 2007-01-11 14:14:55 -0800 | [diff] [blame] | 567 | unsigned long flags; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 568 | |
| 569 | res = asd_can_queue(asd_ha, num); |
| 570 | if (res) |
| 571 | return res; |
| 572 | |
| 573 | res = num; |
| 574 | ascb = asd_ascb_alloc_list(asd_ha, &res, gfp_flags); |
| 575 | if (res) { |
| 576 | res = -ENOMEM; |
| 577 | goto out_err; |
| 578 | } |
| 579 | |
| 580 | __list_add(&alist, ascb->list.prev, &ascb->list); |
| 581 | list_for_each_entry(a, &alist, list) { |
| 582 | a->uldd_task = t; |
| 583 | t->lldd_task = a; |
| 584 | t = list_entry(t->list.next, struct sas_task, list); |
| 585 | } |
| 586 | list_for_each_entry(a, &alist, list) { |
| 587 | t = a->uldd_task; |
| 588 | a->uldd_timer = 1; |
| 589 | if (t->task_proto & SAS_PROTO_STP) |
| 590 | t->task_proto = SAS_PROTO_STP; |
| 591 | switch (t->task_proto) { |
| 592 | case SATA_PROTO: |
| 593 | case SAS_PROTO_STP: |
| 594 | res = asd_build_ata_ascb(a, t, gfp_flags); |
| 595 | break; |
| 596 | case SAS_PROTO_SMP: |
| 597 | res = asd_build_smp_ascb(a, t, gfp_flags); |
| 598 | break; |
| 599 | case SAS_PROTO_SSP: |
| 600 | res = asd_build_ssp_ascb(a, t, gfp_flags); |
| 601 | break; |
| 602 | default: |
| 603 | asd_printk("unknown sas_task proto: 0x%x\n", |
| 604 | t->task_proto); |
| 605 | res = -ENOMEM; |
| 606 | break; |
| 607 | } |
| 608 | if (res) |
| 609 | goto out_err_unmap; |
Darrick J. Wong | b218a0d | 2007-01-11 14:14:55 -0800 | [diff] [blame] | 610 | |
| 611 | spin_lock_irqsave(&t->task_state_lock, flags); |
| 612 | t->task_state_flags |= SAS_TASK_AT_INITIATOR; |
| 613 | spin_unlock_irqrestore(&t->task_state_lock, flags); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 614 | } |
| 615 | list_del_init(&alist); |
| 616 | |
| 617 | res = asd_post_ascb_list(asd_ha, ascb, num); |
| 618 | if (unlikely(res)) { |
| 619 | a = NULL; |
| 620 | __list_add(&alist, ascb->list.prev, &ascb->list); |
| 621 | goto out_err_unmap; |
| 622 | } |
| 623 | |
| 624 | return 0; |
| 625 | out_err_unmap: |
| 626 | { |
| 627 | struct asd_ascb *b = a; |
| 628 | list_for_each_entry(a, &alist, list) { |
| 629 | if (a == b) |
| 630 | break; |
| 631 | t = a->uldd_task; |
Darrick J. Wong | b218a0d | 2007-01-11 14:14:55 -0800 | [diff] [blame] | 632 | spin_lock_irqsave(&t->task_state_lock, flags); |
| 633 | t->task_state_flags &= ~SAS_TASK_AT_INITIATOR; |
| 634 | spin_unlock_irqrestore(&t->task_state_lock, flags); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 635 | switch (t->task_proto) { |
| 636 | case SATA_PROTO: |
| 637 | case SAS_PROTO_STP: |
| 638 | asd_unbuild_ata_ascb(a); |
| 639 | break; |
| 640 | case SAS_PROTO_SMP: |
| 641 | asd_unbuild_smp_ascb(a); |
| 642 | break; |
| 643 | case SAS_PROTO_SSP: |
| 644 | asd_unbuild_ssp_ascb(a); |
| 645 | default: |
| 646 | break; |
| 647 | } |
| 648 | t->lldd_task = NULL; |
| 649 | } |
| 650 | } |
| 651 | list_del_init(&alist); |
| 652 | out_err: |
| 653 | if (ascb) |
| 654 | asd_ascb_free_list(ascb); |
| 655 | asd_can_dequeue(asd_ha, num); |
| 656 | return res; |
| 657 | } |