diff options
Diffstat (limited to 'drivers/scsi/aic94xx/aic94xx_task.c')
| -rw-r--r-- | drivers/scsi/aic94xx/aic94xx_task.c | 642 |
1 files changed, 642 insertions, 0 deletions
diff --git a/drivers/scsi/aic94xx/aic94xx_task.c b/drivers/scsi/aic94xx/aic94xx_task.c new file mode 100644 index 000000000000..d202ed5a6709 --- /dev/null +++ b/drivers/scsi/aic94xx/aic94xx_task.c @@ -0,0 +1,642 @@ +/* + * Aic94xx SAS/SATA Tasks + * + * Copyright (C) 2005 Adaptec, Inc. All rights reserved. + * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com> + * + * This file is licensed under GPLv2. + * + * This file is part of the aic94xx driver. + * + * The aic94xx driver 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. + * + * The aic94xx driver 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. + * + * You should have received a copy of the GNU General Public License + * along with the aic94xx driver; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * + */ + +#include <linux/spinlock.h> +#include "aic94xx.h" +#include "aic94xx_sas.h" +#include "aic94xx_hwi.h" + +static void asd_unbuild_ata_ascb(struct asd_ascb *a); +static void asd_unbuild_smp_ascb(struct asd_ascb *a); +static void asd_unbuild_ssp_ascb(struct asd_ascb *a); + +static inline void asd_can_dequeue(struct asd_ha_struct *asd_ha, int num) +{ + unsigned long flags; + + spin_lock_irqsave(&asd_ha->seq.pend_q_lock, flags); + asd_ha->seq.can_queue += num; + spin_unlock_irqrestore(&asd_ha->seq.pend_q_lock, flags); +} + +/* PCI_DMA_... to our direction translation. + */ +static const u8 data_dir_flags[] = { + [PCI_DMA_BIDIRECTIONAL] = DATA_DIR_BYRECIPIENT, /* UNSPECIFIED */ + [PCI_DMA_TODEVICE] = DATA_DIR_OUT, /* OUTBOUND */ + [PCI_DMA_FROMDEVICE] = DATA_DIR_IN, /* INBOUND */ + [PCI_DMA_NONE] = DATA_DIR_NONE, /* NO TRANSFER */ +}; + +static inline int asd_map_scatterlist(struct sas_task *task, + struct sg_el *sg_arr, + gfp_t gfp_flags) +{ + struct asd_ascb *ascb = task->lldd_task; + struct asd_ha_struct *asd_ha = ascb->ha; + struct scatterlist *sc; + int num_sg, res; + + if (task->data_dir == PCI_DMA_NONE) + return 0; + + if (task->num_scatter == 0) { + void *p = task->scatter; + dma_addr_t dma = pci_map_single(asd_ha->pcidev, p, + task->total_xfer_len, + task->data_dir); + sg_arr[0].bus_addr = cpu_to_le64((u64)dma); + sg_arr[0].size = cpu_to_le32(task->total_xfer_len); + sg_arr[0].flags |= ASD_SG_EL_LIST_EOL; + return 0; + } + + num_sg = pci_map_sg(asd_ha->pcidev, task->scatter, task->num_scatter, + task->data_dir); + if (num_sg == 0) + return -ENOMEM; + + if (num_sg > 3) { + int i; + + ascb->sg_arr = asd_alloc_coherent(asd_ha, + num_sg*sizeof(struct sg_el), + gfp_flags); + if (!ascb->sg_arr) { + res = -ENOMEM; + goto err_unmap; + } + for (sc = task->scatter, i = 0; i < num_sg; i++, sc++) { + struct sg_el *sg = + &((struct sg_el *)ascb->sg_arr->vaddr)[i]; + sg->bus_addr = cpu_to_le64((u64)sg_dma_address(sc)); + sg->size = cpu_to_le32((u32)sg_dma_len(sc)); + if (i == num_sg-1) + sg->flags |= ASD_SG_EL_LIST_EOL; + } + + for (sc = task->scatter, i = 0; i < 2; i++, sc++) { + sg_arr[i].bus_addr = + cpu_to_le64((u64)sg_dma_address(sc)); + sg_arr[i].size = cpu_to_le32((u32)sg_dma_len(sc)); + } + sg_arr[1].next_sg_offs = 2 * sizeof(*sg_arr); + sg_arr[1].flags |= ASD_SG_EL_LIST_EOS; + + memset(&sg_arr[2], 0, sizeof(*sg_arr)); + sg_arr[2].bus_addr=cpu_to_le64((u64)ascb->sg_arr->dma_handle); + } else { + int i; + for (sc = task->scatter, i = 0; i < num_sg; i++, sc++) { + sg_arr[i].bus_addr = + cpu_to_le64((u64)sg_dma_address(sc)); + sg_arr[i].size = cpu_to_le32((u32)sg_dma_len(sc)); + } + sg_arr[i-1].flags |= ASD_SG_EL_LIST_EOL; + } + + return 0; +err_unmap: + pci_unmap_sg(asd_ha->pcidev, task->scatter, task->num_scatter, + task->data_dir); + return res; +} + +static inline void asd_unmap_scatterlist(struct asd_ascb *ascb) +{ + struct asd_ha_struct *asd_ha = ascb->ha; + struct sas_task *task = ascb->uldd_task; + + if (task->data_dir == PCI_DMA_NONE) + return; + + if (task->num_scatter == 0) { + dma_addr_t dma = (dma_addr_t) + le64_to_cpu(ascb->scb->ssp_task.sg_element[0].bus_addr); + pci_unmap_single(ascb->ha->pcidev, dma, task->total_xfer_len, + task->data_dir); + return; + } + + asd_free_coherent(asd_ha, ascb->sg_arr); + pci_unmap_sg(asd_ha->pcidev, task->scatter, task->num_scatter, + task->data_dir); +} + +/* ---------- Task complete tasklet ---------- */ + +static void asd_get_response_tasklet(struct asd_ascb *ascb, + struct done_list_struct *dl) +{ + struct asd_ha_struct *asd_ha = ascb->ha; + struct sas_task *task = ascb->uldd_task; + struct task_status_struct *ts = &task->task_status; + unsigned long flags; + struct tc_resp_sb_struct { + __le16 index_escb; + u8 len_lsb; + u8 flags; + } __attribute__ ((packed)) *resp_sb = (void *) dl->status_block; + +/* int size = ((resp_sb->flags & 7) << 8) | resp_sb->len_lsb; */ + int edb_id = ((resp_sb->flags & 0x70) >> 4)-1; + struct asd_ascb *escb; + struct asd_dma_tok *edb; + void *r; + + spin_lock_irqsave(&asd_ha->seq.tc_index_lock, flags); + escb = asd_tc_index_find(&asd_ha->seq, + (int)le16_to_cpu(resp_sb->index_escb)); + spin_unlock_irqrestore(&asd_ha->seq.tc_index_lock, flags); + + if (!escb) { + ASD_DPRINTK("Uh-oh! No escb for this dl?!\n"); + return; + } + + ts->buf_valid_size = 0; + edb = asd_ha->seq.edb_arr[edb_id + escb->edb_index]; + r = edb->vaddr; + if (task->task_proto == SAS_PROTO_SSP) { + struct ssp_response_iu *iu = + r + 16 + sizeof(struct ssp_frame_hdr); + + ts->residual = le32_to_cpu(*(__le32 *)r); + ts->resp = SAS_TASK_COMPLETE; + if (iu->datapres == 0) + ts->stat = iu->status; + else if (iu->datapres == 1) + ts->stat = iu->resp_data[3]; + else if (iu->datapres == 2) { + ts->stat = SAM_CHECK_COND; + ts->buf_valid_size = min((u32) SAS_STATUS_BUF_SIZE, + be32_to_cpu(iu->sense_data_len)); + memcpy(ts->buf, iu->sense_data, ts->buf_valid_size); + if (iu->status != SAM_CHECK_COND) { + ASD_DPRINTK("device %llx sent sense data, but " + "stat(0x%x) is not CHECK_CONDITION" + "\n", + SAS_ADDR(task->dev->sas_addr), + ts->stat); + } + } + } else { + struct ata_task_resp *resp = (void *) &ts->buf[0]; + + ts->residual = le32_to_cpu(*(__le32 *)r); + + if (SAS_STATUS_BUF_SIZE >= sizeof(*resp)) { + resp->frame_len = le16_to_cpu(*(__le16 *)(r+6)); + memcpy(&resp->ending_fis[0], r+16, 24); + ts->buf_valid_size = sizeof(*resp); + } + } + + asd_invalidate_edb(escb, edb_id); +} + +static void asd_task_tasklet_complete(struct asd_ascb *ascb, + struct done_list_struct *dl) +{ + struct sas_task *task = ascb->uldd_task; + struct task_status_struct *ts = &task->task_status; + unsigned long flags; + u8 opcode = dl->opcode; + + asd_can_dequeue(ascb->ha, 1); + +Again: + switch (opcode) { + case TC_NO_ERROR: + ts->resp = SAS_TASK_COMPLETE; + ts->stat = SAM_GOOD; + break; + case TC_UNDERRUN: + ts->resp = SAS_TASK_COMPLETE; + ts->stat = SAS_DATA_UNDERRUN; + ts->residual = le32_to_cpu(*(__le32 *)dl->status_block); + break; + case TC_OVERRUN: + ts->resp = SAS_TASK_COMPLETE; + ts->stat = SAS_DATA_OVERRUN; + ts->residual = 0; + break; + case TC_SSP_RESP: + case TC_ATA_RESP: + ts->resp = SAS_TASK_COMPLETE; + ts->stat = SAS_PROTO_RESPONSE; + asd_get_response_tasklet(ascb, dl); + break; + case TF_OPEN_REJECT: + ts->resp = SAS_TASK_UNDELIVERED; + ts->stat = SAS_OPEN_REJECT; + if (dl->status_block[1] & 2) + ts->open_rej_reason = 1 + dl->status_block[2]; + else if (dl->status_block[1] & 1) + ts->open_rej_reason = (dl->status_block[2] >> 4)+10; + else + ts->open_rej_reason = SAS_OREJ_UNKNOWN; + break; + case TF_OPEN_TO: + ts->resp = SAS_TASK_UNDELIVERED; + ts->stat = SAS_OPEN_TO; + break; + case TF_PHY_DOWN: + case TU_PHY_DOWN: + ts->resp = SAS_TASK_UNDELIVERED; + ts->stat = SAS_PHY_DOWN; + break; + case TI_PHY_DOWN: + ts->resp = SAS_TASK_COMPLETE; + ts->stat = SAS_PHY_DOWN; + break; + case TI_BREAK: + case TI_PROTO_ERR: + case TI_NAK: + case TI_ACK_NAK_TO: + case TF_SMP_XMIT_RCV_ERR: + case TC_ATA_R_ERR_RECV: + ts->resp = SAS_TASK_COMPLETE; + ts->stat = SAS_INTERRUPTED; + break; + case TF_BREAK: + case TU_BREAK: + case TU_ACK_NAK_TO: + case TF_SMPRSP_TO: + ts->resp = SAS_TASK_UNDELIVERED; + ts->stat = SAS_DEV_NO_RESPONSE; + break; + case TF_NAK_RECV: + ts->resp = SAS_TASK_COMPLETE; + ts->stat = SAS_NAK_R_ERR; + break; + case TA_I_T_NEXUS_LOSS: + opcode = dl->status_block[0]; + goto Again; + break; + case TF_INV_CONN_HANDLE: + ts->resp = SAS_TASK_UNDELIVERED; + ts->stat = SAS_DEVICE_UNKNOWN; + break; + case TF_REQUESTED_N_PENDING: + ts->resp = SAS_TASK_UNDELIVERED; + ts->stat = SAS_PENDING; + break; + case TC_TASK_CLEARED: + case TA_ON_REQ: + ts->resp = SAS_TASK_COMPLETE; + ts->stat = SAS_ABORTED_TASK; + break; + + case TF_NO_SMP_CONN: + case TF_TMF_NO_CTX: + case TF_TMF_NO_TAG: + case TF_TMF_TAG_FREE: + case TF_TMF_TASK_DONE: + case TF_TMF_NO_CONN_HANDLE: + case TF_IRTT_TO: + case TF_IU_SHORT: + case TF_DATA_OFFS_ERR: + ts->resp = SAS_TASK_UNDELIVERED; + ts->stat = SAS_DEV_NO_RESPONSE; + break; + + case TC_LINK_ADM_RESP: + case TC_CONTROL_PHY: + case TC_RESUME: + case TC_PARTIAL_SG_LIST: + default: + ASD_DPRINTK("%s: dl opcode: 0x%x?\n", __FUNCTION__, opcode); + break; + } + + switch (task->task_proto) { + case SATA_PROTO: + case SAS_PROTO_STP: + asd_unbuild_ata_ascb(ascb); + break; + case SAS_PROTO_SMP: + asd_unbuild_smp_ascb(ascb); + break; + case SAS_PROTO_SSP: + asd_unbuild_ssp_ascb(ascb); + default: + break; + } + + spin_lock_irqsave(&task->task_state_lock, flags); + task->task_state_flags &= ~SAS_TASK_STATE_PENDING; + task->task_state_flags |= SAS_TASK_STATE_DONE; + if (unlikely((task->task_state_flags & SAS_TASK_STATE_ABORTED))) { + spin_unlock_irqrestore(&task->task_state_lock, flags); + ASD_DPRINTK("task 0x%p done with opcode 0x%x resp 0x%x " + "stat 0x%x but aborted by upper layer!\n", + task, opcode, ts->resp, ts->stat); + complete(&ascb->completion); + } else { + spin_unlock_irqrestore(&task->task_state_lock, flags); + task->lldd_task = NULL; + asd_ascb_free(ascb); + mb(); + task->task_done(task); + } +} + +/* ---------- ATA ---------- */ + +static int asd_build_ata_ascb(struct asd_ascb *ascb, struct sas_task *task, + gfp_t gfp_flags) +{ + struct domain_device *dev = task->dev; + struct scb *scb; + u8 flags; + int res = 0; + + scb = ascb->scb; + + if (unlikely(task->ata_task.device_control_reg_update)) + scb->header.opcode = CONTROL_ATA_DEV; + else if (dev->sata_dev.command_set == ATA_COMMAND_SET) + scb->header.opcode = INITIATE_ATA_TASK; + else + scb->header.opcode = INITIATE_ATAPI_TASK; + + scb->ata_task.proto_conn_rate = (1 << 5); /* STP */ + if (dev->port->oob_mode == SAS_OOB_MODE) + scb->ata_task.proto_conn_rate |= dev->linkrate; + + scb->ata_task.total_xfer_len = cpu_to_le32(task->total_xfer_len); + scb->ata_task.fis = task->ata_task.fis; + scb->ata_task.fis.fis_type = 0x27; + if (likely(!task->ata_task.device_control_reg_update)) + scb->ata_task.fis.flags |= 0x80; /* C=1: update ATA cmd reg */ + scb->ata_task.fis.flags &= 0xF0; /* PM_PORT field shall be 0 */ + if (dev->sata_dev.command_set == ATAPI_COMMAND_SET) + memcpy(scb->ata_task.atapi_packet, task->ata_task.atapi_packet, + 16); + scb->ata_task.sister_scb = cpu_to_le16(0xFFFF); + scb->ata_task.conn_handle = cpu_to_le16( + (u16)(unsigned long)dev->lldd_dev); + + if (likely(!task->ata_task.device_control_reg_update)) { + flags = 0; + if (task->ata_task.dma_xfer) + flags |= DATA_XFER_MODE_DMA; + if (task->ata_task.use_ncq && + dev->sata_dev.command_set != ATAPI_COMMAND_SET) + flags |= ATA_Q_TYPE_NCQ; + flags |= data_dir_flags[task->data_dir]; + scb->ata_task.ata_flags = flags; + + scb->ata_task.retry_count = task->ata_task.retry_count; + + flags = 0; + if (task->ata_task.set_affil_pol) + flags |= SET_AFFIL_POLICY; + if (task->ata_task.stp_affil_pol) + flags |= STP_AFFIL_POLICY; + scb->ata_task.flags = flags; + } + ascb->tasklet_complete = asd_task_tasklet_complete; + + if (likely(!task->ata_task.device_control_reg_update)) + res = asd_map_scatterlist(task, scb->ata_task.sg_element, + gfp_flags); + + return res; +} + +static void asd_unbuild_ata_ascb(struct asd_ascb *a) +{ + asd_unmap_scatterlist(a); +} + +/* ---------- SMP ---------- */ + +static int asd_build_smp_ascb(struct asd_ascb *ascb, struct sas_task *task, + gfp_t gfp_flags) +{ + struct asd_ha_struct *asd_ha = ascb->ha; + struct domain_device *dev = task->dev; + struct scb *scb; + + pci_map_sg(asd_ha->pcidev, &task->smp_task.smp_req, 1, + PCI_DMA_FROMDEVICE); + pci_map_sg(asd_ha->pcidev, &task->smp_task.smp_resp, 1, + PCI_DMA_FROMDEVICE); + + scb = ascb->scb; + + scb->header.opcode = INITIATE_SMP_TASK; + + scb->smp_task.proto_conn_rate = dev->linkrate; + + scb->smp_task.smp_req.bus_addr = + cpu_to_le64((u64)sg_dma_address(&task->smp_task.smp_req)); + scb->smp_task.smp_req.size = + cpu_to_le32((u32)sg_dma_len(&task->smp_task.smp_req)-4); + + scb->smp_task.smp_resp.bus_addr = + cpu_to_le64((u64)sg_dma_address(&task->smp_task.smp_resp)); + scb->smp_task.smp_resp.size = + cpu_to_le32((u32)sg_dma_len(&task->smp_task.smp_resp)-4); + + scb->smp_task.sister_scb = cpu_to_le16(0xFFFF); + scb->smp_task.conn_handle = cpu_to_le16((u16) + (unsigned long)dev->lldd_dev); + + ascb->tasklet_complete = asd_task_tasklet_complete; + + return 0; +} + +static void asd_unbuild_smp_ascb(struct asd_ascb *a) +{ + struct sas_task *task = a->uldd_task; + + BUG_ON(!task); + pci_unmap_sg(a->ha->pcidev, &task->smp_task.smp_req, 1, + PCI_DMA_FROMDEVICE); + pci_unmap_sg(a->ha->pcidev, &task->smp_task.smp_resp, 1, + PCI_DMA_FROMDEVICE); +} + +/* ---------- SSP ---------- */ + +static int asd_build_ssp_ascb(struct asd_ascb *ascb, struct sas_task *task, + gfp_t gfp_flags) +{ + struct domain_device *dev = task->dev; + struct scb *scb; + int res = 0; + + scb = ascb->scb; + + scb->header.opcode = INITIATE_SSP_TASK; + + scb->ssp_task.proto_conn_rate = (1 << 4); /* SSP */ + scb->ssp_task.proto_conn_rate |= dev->linkrate; + scb->ssp_task.total_xfer_len = cpu_to_le32(task->total_xfer_len); + scb->ssp_task.ssp_frame.frame_type = SSP_DATA; + memcpy(scb->ssp_task.ssp_frame.hashed_dest_addr, dev->hashed_sas_addr, + HASHED_SAS_ADDR_SIZE); + memcpy(scb->ssp_task.ssp_frame.hashed_src_addr, + dev->port->ha->hashed_sas_addr, HASHED_SAS_ADDR_SIZE); + scb->ssp_task.ssp_frame.tptt = cpu_to_be16(0xFFFF); + + memcpy(scb->ssp_task.ssp_cmd.lun, task->ssp_task.LUN, 8); + if (task->ssp_task.enable_first_burst) + scb->ssp_task.ssp_cmd.efb_prio_attr |= EFB_MASK; + scb->ssp_task.ssp_cmd.efb_prio_attr |= (task->ssp_task.task_prio << 3); + scb->ssp_task.ssp_cmd.efb_prio_attr |= (task->ssp_task.task_attr & 7); + memcpy(scb->ssp_task.ssp_cmd.cdb, task->ssp_task.cdb, 16); + + scb->ssp_task.sister_scb = cpu_to_le16(0xFFFF); + scb->ssp_task.conn_handle = cpu_to_le16( + (u16)(unsigned long)dev->lldd_dev); + scb->ssp_task.data_dir = data_dir_flags[task->data_dir]; + scb->ssp_task.retry_count = scb->ssp_task.retry_count; + + ascb->tasklet_complete = asd_task_tasklet_complete; + + res = asd_map_scatterlist(task, scb->ssp_task.sg_element, gfp_flags); + + return res; +} + +static void asd_unbuild_ssp_ascb(struct asd_ascb *a) +{ + asd_unmap_scatterlist(a); +} + +/* ---------- Execute Task ---------- */ + +static inline int asd_can_queue(struct asd_ha_struct *asd_ha, int num) +{ + int res = 0; + unsigned long flags; + + spin_lock_irqsave(&asd_ha->seq.pend_q_lock, flags); + if ((asd_ha->seq.can_queue - num) < 0) + res = -SAS_QUEUE_FULL; + else + asd_ha->seq.can_queue -= num; + spin_unlock_irqrestore(&asd_ha->seq.pend_q_lock, flags); + + return res; +} + +int asd_execute_task(struct sas_task *task, const int num, + gfp_t gfp_flags) +{ + int res = 0; + LIST_HEAD(alist); + struct sas_task *t = task; + struct asd_ascb *ascb = NULL, *a; + struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha; + + res = asd_can_queue(asd_ha, num); + if (res) + return res; + + res = num; + ascb = asd_ascb_alloc_list(asd_ha, &res, gfp_flags); + if (res) { + res = -ENOMEM; + goto out_err; + } + + __list_add(&alist, ascb->list.prev, &ascb->list); + list_for_each_entry(a, &alist, list) { + a->uldd_task = t; + t->lldd_task = a; + t = list_entry(t->list.next, struct sas_task, list); + } + list_for_each_entry(a, &alist, list) { + t = a->uldd_task; + a->uldd_timer = 1; + if (t->task_proto & SAS_PROTO_STP) + t->task_proto = SAS_PROTO_STP; + switch (t->task_proto) { + case SATA_PROTO: + case SAS_PROTO_STP: + res = asd_build_ata_ascb(a, t, gfp_flags); + break; + case SAS_PROTO_SMP: + res = asd_build_smp_ascb(a, t, gfp_flags); + break; + case SAS_PROTO_SSP: + res = asd_build_ssp_ascb(a, t, gfp_flags); + break; + default: + asd_printk("unknown sas_task proto: 0x%x\n", + t->task_proto); + res = -ENOMEM; + break; + } + if (res) + goto out_err_unmap; + } + list_del_init(&alist); + + res = asd_post_ascb_list(asd_ha, ascb, num); + if (unlikely(res)) { + a = NULL; + __list_add(&alist, ascb->list.prev, &ascb->list); + goto out_err_unmap; + } + + return 0; +out_err_unmap: + { + struct asd_ascb *b = a; + list_for_each_entry(a, &alist, list) { + if (a == b) + break; + t = a->uldd_task; + switch (t->task_proto) { + case SATA_PROTO: + case SAS_PROTO_STP: + asd_unbuild_ata_ascb(a); + break; + case SAS_PROTO_SMP: + asd_unbuild_smp_ascb(a); + break; + case SAS_PROTO_SSP: + asd_unbuild_ssp_ascb(a); + default: + break; + } + t->lldd_task = NULL; + } + } + list_del_init(&alist); +out_err: + if (ascb) + asd_ascb_free_list(ascb); + asd_can_dequeue(asd_ha, num); + return res; +} |