diff options
Diffstat (limited to 'drivers/scsi/mvsas/mv_sas.c')
| -rw-r--r-- | drivers/scsi/mvsas/mv_sas.c | 2103 |
1 files changed, 2103 insertions, 0 deletions
diff --git a/drivers/scsi/mvsas/mv_sas.c b/drivers/scsi/mvsas/mv_sas.c new file mode 100644 index 000000000..a2a13969c --- /dev/null +++ b/drivers/scsi/mvsas/mv_sas.c @@ -0,0 +1,2103 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Marvell 88SE64xx/88SE94xx main function + * + * Copyright 2007 Red Hat, Inc. + * Copyright 2008 Marvell. <kewei@marvell.com> + * Copyright 2009-2011 Marvell. <yuxiangl@marvell.com> +*/ + +#include "mv_sas.h" + +static int mvs_find_tag(struct mvs_info *mvi, struct sas_task *task, u32 *tag) +{ + if (task->lldd_task) { + struct mvs_slot_info *slot; + slot = task->lldd_task; + *tag = slot->slot_tag; + return 1; + } + return 0; +} + +void mvs_tag_clear(struct mvs_info *mvi, u32 tag) +{ + void *bitmap = mvi->tags; + clear_bit(tag, bitmap); +} + +void mvs_tag_free(struct mvs_info *mvi, u32 tag) +{ + mvs_tag_clear(mvi, tag); +} + +void mvs_tag_set(struct mvs_info *mvi, unsigned int tag) +{ + void *bitmap = mvi->tags; + set_bit(tag, bitmap); +} + +inline int mvs_tag_alloc(struct mvs_info *mvi, u32 *tag_out) +{ + unsigned int index, tag; + void *bitmap = mvi->tags; + + index = find_first_zero_bit(bitmap, mvi->tags_num); + tag = index; + if (tag >= mvi->tags_num) + return -SAS_QUEUE_FULL; + mvs_tag_set(mvi, tag); + *tag_out = tag; + return 0; +} + +void mvs_tag_init(struct mvs_info *mvi) +{ + int i; + for (i = 0; i < mvi->tags_num; ++i) + mvs_tag_clear(mvi, i); +} + +static struct mvs_info *mvs_find_dev_mvi(struct domain_device *dev) +{ + unsigned long i = 0, j = 0, hi = 0; + struct sas_ha_struct *sha = dev->port->ha; + struct mvs_info *mvi = NULL; + struct asd_sas_phy *phy; + + while (sha->sas_port[i]) { + if (sha->sas_port[i] == dev->port) { + phy = container_of(sha->sas_port[i]->phy_list.next, + struct asd_sas_phy, port_phy_el); + j = 0; + while (sha->sas_phy[j]) { + if (sha->sas_phy[j] == phy) + break; + j++; + } + break; + } + i++; + } + hi = j/((struct mvs_prv_info *)sha->lldd_ha)->n_phy; + mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[hi]; + + return mvi; + +} + +static int mvs_find_dev_phyno(struct domain_device *dev, int *phyno) +{ + unsigned long i = 0, j = 0, n = 0, num = 0; + struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev; + struct mvs_info *mvi = mvi_dev->mvi_info; + struct sas_ha_struct *sha = dev->port->ha; + + while (sha->sas_port[i]) { + if (sha->sas_port[i] == dev->port) { + struct asd_sas_phy *phy; + list_for_each_entry(phy, + &sha->sas_port[i]->phy_list, port_phy_el) { + j = 0; + while (sha->sas_phy[j]) { + if (sha->sas_phy[j] == phy) + break; + j++; + } + phyno[n] = (j >= mvi->chip->n_phy) ? + (j - mvi->chip->n_phy) : j; + num++; + n++; + } + break; + } + i++; + } + return num; +} + +struct mvs_device *mvs_find_dev_by_reg_set(struct mvs_info *mvi, + u8 reg_set) +{ + u32 dev_no; + for (dev_no = 0; dev_no < MVS_MAX_DEVICES; dev_no++) { + if (mvi->devices[dev_no].taskfileset == MVS_ID_NOT_MAPPED) + continue; + + if (mvi->devices[dev_no].taskfileset == reg_set) + return &mvi->devices[dev_no]; + } + return NULL; +} + +static inline void mvs_free_reg_set(struct mvs_info *mvi, + struct mvs_device *dev) +{ + if (!dev) { + mv_printk("device has been free.\n"); + return; + } + if (dev->taskfileset == MVS_ID_NOT_MAPPED) + return; + MVS_CHIP_DISP->free_reg_set(mvi, &dev->taskfileset); +} + +static inline u8 mvs_assign_reg_set(struct mvs_info *mvi, + struct mvs_device *dev) +{ + if (dev->taskfileset != MVS_ID_NOT_MAPPED) + return 0; + return MVS_CHIP_DISP->assign_reg_set(mvi, &dev->taskfileset); +} + +void mvs_phys_reset(struct mvs_info *mvi, u32 phy_mask, int hard) +{ + u32 no; + for_each_phy(phy_mask, phy_mask, no) { + if (!(phy_mask & 1)) + continue; + MVS_CHIP_DISP->phy_reset(mvi, no, hard); + } +} + +int mvs_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func, + void *funcdata) +{ + int rc = 0, phy_id = sas_phy->id; + u32 tmp, i = 0, hi; + struct sas_ha_struct *sha = sas_phy->ha; + struct mvs_info *mvi = NULL; + + while (sha->sas_phy[i]) { + if (sha->sas_phy[i] == sas_phy) + break; + i++; + } + hi = i/((struct mvs_prv_info *)sha->lldd_ha)->n_phy; + mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[hi]; + + switch (func) { + case PHY_FUNC_SET_LINK_RATE: + MVS_CHIP_DISP->phy_set_link_rate(mvi, phy_id, funcdata); + break; + + case PHY_FUNC_HARD_RESET: + tmp = MVS_CHIP_DISP->read_phy_ctl(mvi, phy_id); + if (tmp & PHY_RST_HARD) + break; + MVS_CHIP_DISP->phy_reset(mvi, phy_id, MVS_HARD_RESET); + break; + + case PHY_FUNC_LINK_RESET: + MVS_CHIP_DISP->phy_enable(mvi, phy_id); + MVS_CHIP_DISP->phy_reset(mvi, phy_id, MVS_SOFT_RESET); + break; + + case PHY_FUNC_DISABLE: + MVS_CHIP_DISP->phy_disable(mvi, phy_id); + break; + case PHY_FUNC_RELEASE_SPINUP_HOLD: + default: + rc = -ENOSYS; + } + msleep(200); + return rc; +} + +void mvs_set_sas_addr(struct mvs_info *mvi, int port_id, u32 off_lo, + u32 off_hi, u64 sas_addr) +{ + u32 lo = (u32)sas_addr; + u32 hi = (u32)(sas_addr>>32); + + MVS_CHIP_DISP->write_port_cfg_addr(mvi, port_id, off_lo); + MVS_CHIP_DISP->write_port_cfg_data(mvi, port_id, lo); + MVS_CHIP_DISP->write_port_cfg_addr(mvi, port_id, off_hi); + MVS_CHIP_DISP->write_port_cfg_data(mvi, port_id, hi); +} + +static void mvs_bytes_dmaed(struct mvs_info *mvi, int i, gfp_t gfp_flags) +{ + struct mvs_phy *phy = &mvi->phy[i]; + struct asd_sas_phy *sas_phy = &phy->sas_phy; + + if (!phy->phy_attached) + return; + + if (!(phy->att_dev_info & PORT_DEV_TRGT_MASK) + && phy->phy_type & PORT_TYPE_SAS) { + return; + } + + sas_notify_phy_event_gfp(sas_phy, PHYE_OOB_DONE, gfp_flags); + + if (sas_phy->phy) { + struct sas_phy *sphy = sas_phy->phy; + + sphy->negotiated_linkrate = sas_phy->linkrate; + sphy->minimum_linkrate = phy->minimum_linkrate; + sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS; + sphy->maximum_linkrate = phy->maximum_linkrate; + sphy->maximum_linkrate_hw = MVS_CHIP_DISP->phy_max_link_rate(); + } + + if (phy->phy_type & PORT_TYPE_SAS) { + struct sas_identify_frame *id; + + id = (struct sas_identify_frame *)phy->frame_rcvd; + id->dev_type = phy->identify.device_type; + id->initiator_bits = SAS_PROTOCOL_ALL; + id->target_bits = phy->identify.target_port_protocols; + + /* direct attached SAS device */ + if (phy->att_dev_info & PORT_SSP_TRGT_MASK) { + MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_PHY_STAT); + MVS_CHIP_DISP->write_port_cfg_data(mvi, i, 0x00); + } + } else if (phy->phy_type & PORT_TYPE_SATA) { + /*Nothing*/ + } + mv_dprintk("phy %d byte dmaded.\n", i + mvi->id * mvi->chip->n_phy); + + sas_phy->frame_rcvd_size = phy->frame_rcvd_size; + + sas_notify_port_event_gfp(sas_phy, PORTE_BYTES_DMAED, gfp_flags); +} + +void mvs_scan_start(struct Scsi_Host *shost) +{ + int i, j; + unsigned short core_nr; + struct mvs_info *mvi; + struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost); + struct mvs_prv_info *mvs_prv = sha->lldd_ha; + + core_nr = ((struct mvs_prv_info *)sha->lldd_ha)->n_host; + + for (j = 0; j < core_nr; j++) { + mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[j]; + for (i = 0; i < mvi->chip->n_phy; ++i) + mvs_bytes_dmaed(mvi, i, GFP_KERNEL); + } + mvs_prv->scan_finished = 1; +} + +int mvs_scan_finished(struct Scsi_Host *shost, unsigned long time) +{ + struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost); + struct mvs_prv_info *mvs_prv = sha->lldd_ha; + + if (mvs_prv->scan_finished == 0) + return 0; + + sas_drain_work(sha); + return 1; +} + +static int mvs_task_prep_smp(struct mvs_info *mvi, + struct mvs_task_exec_info *tei) +{ + int elem, rc, i; + struct sas_ha_struct *sha = mvi->sas; + struct sas_task *task = tei->task; + struct mvs_cmd_hdr *hdr = tei->hdr; + struct domain_device *dev = task->dev; + struct asd_sas_port *sas_port = dev->port; + struct sas_phy *sphy = dev->phy; + struct asd_sas_phy *sas_phy = sha->sas_phy[sphy->number]; + struct scatterlist *sg_req, *sg_resp; + u32 req_len, resp_len, tag = tei->tag; + void *buf_tmp; + u8 *buf_oaf; + dma_addr_t buf_tmp_dma; + void *buf_prd; + struct mvs_slot_info *slot = &mvi->slot_info[tag]; + u32 flags = (tei->n_elem << MCH_PRD_LEN_SHIFT); + + /* + * DMA-map SMP request, response buffers + */ + sg_req = &task->smp_task.smp_req; + elem = dma_map_sg(mvi->dev, sg_req, 1, DMA_TO_DEVICE); + if (!elem) + return -ENOMEM; + req_len = sg_dma_len(sg_req); + + sg_resp = &task->smp_task.smp_resp; + elem = dma_map_sg(mvi->dev, sg_resp, 1, DMA_FROM_DEVICE); + if (!elem) { + rc = -ENOMEM; + goto err_out; + } + resp_len = SB_RFB_MAX; + + /* must be in dwords */ + if ((req_len & 0x3) || (resp_len & 0x3)) { + rc = -EINVAL; + goto err_out_2; + } + + /* + * arrange MVS_SLOT_BUF_SZ-sized DMA buffer according to our needs + */ + + /* region 1: command table area (MVS_SSP_CMD_SZ bytes) ***** */ + buf_tmp = slot->buf; + buf_tmp_dma = slot->buf_dma; + + hdr->cmd_tbl = cpu_to_le64(sg_dma_address(sg_req)); + + /* region 2: open address frame area (MVS_OAF_SZ bytes) ********* */ + buf_oaf = buf_tmp; + hdr->open_frame = cpu_to_le64(buf_tmp_dma); + + buf_tmp += MVS_OAF_SZ; + buf_tmp_dma += MVS_OAF_SZ; + + /* region 3: PRD table *********************************** */ + buf_prd = buf_tmp; + if (tei->n_elem) + hdr->prd_tbl = cpu_to_le64(buf_tmp_dma); + else + hdr->prd_tbl = 0; + + i = MVS_CHIP_DISP->prd_size() * tei->n_elem; + buf_tmp += i; + buf_tmp_dma += i; + + /* region 4: status buffer (larger the PRD, smaller this buf) ****** */ + slot->response = buf_tmp; + hdr->status_buf = cpu_to_le64(buf_tmp_dma); + if (mvi->flags & MVF_FLAG_SOC) + hdr->reserved[0] = 0; + + /* + * Fill in TX ring and command slot header + */ + slot->tx = mvi->tx_prod; + mvi->tx[mvi->tx_prod] = cpu_to_le32((TXQ_CMD_SMP << TXQ_CMD_SHIFT) | + TXQ_MODE_I | tag | + (MVS_PHY_ID << TXQ_PHY_SHIFT)); + + hdr->flags |= flags; + hdr->lens = cpu_to_le32(((resp_len / 4) << 16) | ((req_len - 4) / 4)); + hdr->tags = cpu_to_le32(tag); + hdr->data_len = 0; + + /* generate open address frame hdr (first 12 bytes) */ + /* initiator, SMP, ftype 1h */ + buf_oaf[0] = (1 << 7) | (PROTOCOL_SMP << 4) | 0x01; + buf_oaf[1] = min(sas_port->linkrate, dev->linkrate) & 0xf; + *(u16 *)(buf_oaf + 2) = 0xFFFF; /* SAS SPEC */ + memcpy(buf_oaf + 4, dev->sas_addr, SAS_ADDR_SIZE); + + /* fill in PRD (scatter/gather) table, if any */ + MVS_CHIP_DISP->make_prd(task->scatter, tei->n_elem, buf_prd); + + return 0; + +err_out_2: + dma_unmap_sg(mvi->dev, &tei->task->smp_task.smp_resp, 1, + DMA_FROM_DEVICE); +err_out: + dma_unmap_sg(mvi->dev, &tei->task->smp_task.smp_req, 1, + DMA_TO_DEVICE); + return rc; +} + +static u32 mvs_get_ncq_tag(struct sas_task *task, u32 *tag) +{ + struct ata_queued_cmd *qc = task->uldd_task; + + if (qc) { + if (qc->tf.command == ATA_CMD_FPDMA_WRITE || + qc->tf.command == ATA_CMD_FPDMA_READ || + qc->tf.command == ATA_CMD_FPDMA_RECV || + qc->tf.command == ATA_CMD_FPDMA_SEND || + qc->tf.command == ATA_CMD_NCQ_NON_DATA) { + *tag = qc->tag; + return 1; + } + } + + return 0; +} + +static int mvs_task_prep_ata(struct mvs_info *mvi, + struct mvs_task_exec_info *tei) +{ + struct sas_task *task = tei->task; + struct domain_device *dev = task->dev; + struct mvs_device *mvi_dev = dev->lldd_dev; + struct mvs_cmd_hdr *hdr = tei->hdr; + struct asd_sas_port *sas_port = dev->port; + struct mvs_slot_info *slot; + void *buf_prd; + u32 tag = tei->tag, hdr_tag; + u32 flags, del_q; + void *buf_tmp; + u8 *buf_cmd, *buf_oaf; + dma_addr_t buf_tmp_dma; + u32 i, req_len, resp_len; + const u32 max_resp_len = SB_RFB_MAX; + + if (mvs_assign_reg_set(mvi, mvi_dev) == MVS_ID_NOT_MAPPED) { + mv_dprintk("Have not enough regiset for dev %d.\n", + mvi_dev->device_id); + return -EBUSY; + } + slot = &mvi->slot_info[tag]; + slot->tx = mvi->tx_prod; + del_q = TXQ_MODE_I | tag | + (TXQ_CMD_STP << TXQ_CMD_SHIFT) | + ((sas_port->phy_mask & TXQ_PHY_MASK) << TXQ_PHY_SHIFT) | + (mvi_dev->taskfileset << TXQ_SRS_SHIFT); + mvi->tx[mvi->tx_prod] = cpu_to_le32(del_q); + + if (task->data_dir == DMA_FROM_DEVICE) + flags = (MVS_CHIP_DISP->prd_count() << MCH_PRD_LEN_SHIFT); + else + flags = (tei->n_elem << MCH_PRD_LEN_SHIFT); + + if (task->ata_task.use_ncq) + flags |= MCH_FPDMA; + if (dev->sata_dev.class == ATA_DEV_ATAPI) { + if (task->ata_task.fis.command != ATA_CMD_ID_ATAPI) + flags |= MCH_ATAPI; + } + + hdr->flags = cpu_to_le32(flags); + + if (task->ata_task.use_ncq && mvs_get_ncq_tag(task, &hdr_tag)) + task->ata_task.fis.sector_count |= (u8) (hdr_tag << 3); + else + hdr_tag = tag; + + hdr->tags = cpu_to_le32(hdr_tag); + + hdr->data_len = cpu_to_le32(task->total_xfer_len); + + /* + * arrange MVS_SLOT_BUF_SZ-sized DMA buffer according to our needs + */ + + /* region 1: command table area (MVS_ATA_CMD_SZ bytes) ************** */ + buf_cmd = buf_tmp = slot->buf; + buf_tmp_dma = slot->buf_dma; + + hdr->cmd_tbl = cpu_to_le64(buf_tmp_dma); + + buf_tmp += MVS_ATA_CMD_SZ; + buf_tmp_dma += MVS_ATA_CMD_SZ; + + /* region 2: open address frame area (MVS_OAF_SZ bytes) ********* */ + /* used for STP. unused for SATA? */ + buf_oaf = buf_tmp; + hdr->open_frame = cpu_to_le64(buf_tmp_dma); + + buf_tmp += MVS_OAF_SZ; + buf_tmp_dma += MVS_OAF_SZ; + + /* region 3: PRD table ********************************************* */ + buf_prd = buf_tmp; + + if (tei->n_elem) + hdr->prd_tbl = cpu_to_le64(buf_tmp_dma); + else + hdr->prd_tbl = 0; + i = MVS_CHIP_DISP->prd_size() * MVS_CHIP_DISP->prd_count(); + + buf_tmp += i; + buf_tmp_dma += i; + + /* region 4: status buffer (larger the PRD, smaller this buf) ****** */ + slot->response = buf_tmp; + hdr->status_buf = cpu_to_le64(buf_tmp_dma); + if (mvi->flags & MVF_FLAG_SOC) + hdr->reserved[0] = 0; + + req_len = sizeof(struct host_to_dev_fis); + resp_len = MVS_SLOT_BUF_SZ - MVS_ATA_CMD_SZ - + sizeof(struct mvs_err_info) - i; + + /* request, response lengths */ + resp_len = min(resp_len, max_resp_len); + hdr->lens = cpu_to_le32(((resp_len / 4) << 16) | (req_len / 4)); + + if (likely(!task->ata_task.device_control_reg_update)) + task->ata_task.fis.flags |= 0x80; /* C=1: update ATA cmd reg */ + /* fill in command FIS and ATAPI CDB */ + memcpy(buf_cmd, &task->ata_task.fis, sizeof(struct host_to_dev_fis)); + if (dev->sata_dev.class == ATA_DEV_ATAPI) + memcpy(buf_cmd + STP_ATAPI_CMD, + task->ata_task.atapi_packet, 16); + + /* generate open address frame hdr (first 12 bytes) */ + /* initiator, STP, ftype 1h */ + buf_oaf[0] = (1 << 7) | (PROTOCOL_STP << 4) | 0x1; + buf_oaf[1] = min(sas_port->linkrate, dev->linkrate) & 0xf; + *(u16 *)(buf_oaf + 2) = cpu_to_be16(mvi_dev->device_id + 1); + memcpy(buf_oaf + 4, dev->sas_addr, SAS_ADDR_SIZE); + + /* fill in PRD (scatter/gather) table, if any */ + MVS_CHIP_DISP->make_prd(task->scatter, tei->n_elem, buf_prd); + + if (task->data_dir == DMA_FROM_DEVICE) + MVS_CHIP_DISP->dma_fix(mvi, sas_port->phy_mask, + TRASH_BUCKET_SIZE, tei->n_elem, buf_prd); + + return 0; +} + +static int mvs_task_prep_ssp(struct mvs_info *mvi, + struct mvs_task_exec_info *tei, int is_tmf, + struct mvs_tmf_task *tmf) +{ + struct sas_task *task = tei->task; + struct mvs_cmd_hdr *hdr = tei->hdr; + struct mvs_port *port = tei->port; + struct domain_device *dev = task->dev; + struct mvs_device *mvi_dev = dev->lldd_dev; + struct asd_sas_port *sas_port = dev->port; + struct mvs_slot_info *slot; + void *buf_prd; + struct ssp_frame_hdr *ssp_hdr; + void *buf_tmp; + u8 *buf_cmd, *buf_oaf, fburst = 0; + dma_addr_t buf_tmp_dma; + u32 flags; + u32 resp_len, req_len, i, tag = tei->tag; + const u32 max_resp_len = SB_RFB_MAX; + u32 phy_mask; + + slot = &mvi->slot_info[tag]; + + phy_mask = ((port->wide_port_phymap) ? port->wide_port_phymap : + sas_port->phy_mask) & TXQ_PHY_MASK; + + slot->tx = mvi->tx_prod; + mvi->tx[mvi->tx_prod] = cpu_to_le32(TXQ_MODE_I | tag | + (TXQ_CMD_SSP << TXQ_CMD_SHIFT) | + (phy_mask << TXQ_PHY_SHIFT)); + + flags = MCH_RETRY; + if (task->ssp_task.enable_first_burst) { + flags |= MCH_FBURST; + fburst = (1 << 7); + } + if (is_tmf) + flags |= (MCH_SSP_FR_TASK << MCH_SSP_FR_TYPE_SHIFT); + else + flags |= (MCH_SSP_FR_CMD << MCH_SSP_FR_TYPE_SHIFT); + + hdr->flags = cpu_to_le32(flags | (tei->n_elem << MCH_PRD_LEN_SHIFT)); + hdr->tags = cpu_to_le32(tag); + hdr->data_len = cpu_to_le32(task->total_xfer_len); + + /* + * arrange MVS_SLOT_BUF_SZ-sized DMA buffer according to our needs + */ + + /* region 1: command table area (MVS_SSP_CMD_SZ bytes) ************** */ + buf_cmd = buf_tmp = slot->buf; + buf_tmp_dma = slot->buf_dma; + + hdr->cmd_tbl = cpu_to_le64(buf_tmp_dma); + + buf_tmp += MVS_SSP_CMD_SZ; + buf_tmp_dma += MVS_SSP_CMD_SZ; + + /* region 2: open address frame area (MVS_OAF_SZ bytes) ********* */ + buf_oaf = buf_tmp; + hdr->open_frame = cpu_to_le64(buf_tmp_dma); + + buf_tmp += MVS_OAF_SZ; + buf_tmp_dma += MVS_OAF_SZ; + + /* region 3: PRD table ********************************************* */ + buf_prd = buf_tmp; + if (tei->n_elem) + hdr->prd_tbl = cpu_to_le64(buf_tmp_dma); + else + hdr->prd_tbl = 0; + + i = MVS_CHIP_DISP->prd_size() * tei->n_elem; + buf_tmp += i; + buf_tmp_dma += i; + + /* region 4: status buffer (larger the PRD, smaller this buf) ****** */ + slot->response = buf_tmp; + hdr->status_buf = cpu_to_le64(buf_tmp_dma); + if (mvi->flags & MVF_FLAG_SOC) + hdr->reserved[0] = 0; + + resp_len = MVS_SLOT_BUF_SZ - MVS_SSP_CMD_SZ - MVS_OAF_SZ - + sizeof(struct mvs_err_info) - i; + resp_len = min(resp_len, max_resp_len); + + req_len = sizeof(struct ssp_frame_hdr) + 28; + + /* request, response lengths */ + hdr->lens = cpu_to_le32(((resp_len / 4) << 16) | (req_len / 4)); + + /* generate open address frame hdr (first 12 bytes) */ + /* initiator, SSP, ftype 1h */ + buf_oaf[0] = (1 << 7) | (PROTOCOL_SSP << 4) | 0x1; + buf_oaf[1] = min(sas_port->linkrate, dev->linkrate) & 0xf; + *(u16 *)(buf_oaf + 2) = cpu_to_be16(mvi_dev->device_id + 1); + memcpy(buf_oaf + 4, dev->sas_addr, SAS_ADDR_SIZE); + + /* fill in SSP frame header (Command Table.SSP frame header) */ + ssp_hdr = (struct ssp_frame_hdr *)buf_cmd; + + if (is_tmf) + ssp_hdr->frame_type = SSP_TASK; + else + ssp_hdr->frame_type = SSP_COMMAND; + + memcpy(ssp_hdr->hashed_dest_addr, dev->hashed_sas_addr, + HASHED_SAS_ADDR_SIZE); + memcpy(ssp_hdr->hashed_src_addr, + dev->hashed_sas_addr, HASHED_SAS_ADDR_SIZE); + ssp_hdr->tag = cpu_to_be16(tag); + + /* fill in IU for TASK and Command Frame */ + buf_cmd += sizeof(*ssp_hdr); + memcpy(buf_cmd, &task->ssp_task.LUN, 8); + + if (ssp_hdr->frame_type != SSP_TASK) { + buf_cmd[9] = fburst | task->ssp_task.task_attr | + (task->ssp_task.task_prio << 3); + memcpy(buf_cmd + 12, task->ssp_task.cmd->cmnd, + task->ssp_task.cmd->cmd_len); + } else{ + buf_cmd[10] = tmf->tmf; + switch (tmf->tmf) { + case TMF_ABORT_TASK: + case TMF_QUERY_TASK: + buf_cmd[12] = + (tmf->tag_of_task_to_be_managed >> 8) & 0xff; + buf_cmd[13] = + tmf->tag_of_task_to_be_managed & 0xff; + break; + default: + break; + } + } + /* fill in PRD (scatter/gather) table, if any */ + MVS_CHIP_DISP->make_prd(task->scatter, tei->n_elem, buf_prd); + return 0; +} + +#define DEV_IS_GONE(mvi_dev) ((!mvi_dev || (mvi_dev->dev_type == SAS_PHY_UNUSED))) +static int mvs_task_prep(struct sas_task *task, struct mvs_info *mvi, int is_tmf, + struct mvs_tmf_task *tmf, int *pass) +{ + struct domain_device *dev = task->dev; + struct mvs_device *mvi_dev = dev->lldd_dev; + struct mvs_task_exec_info tei; + struct mvs_slot_info *slot; + u32 tag = 0xdeadbeef, n_elem = 0; + int rc = 0; + + if (!dev->port) { + struct task_status_struct *tsm = &task->task_status; + + tsm->resp = SAS_TASK_UNDELIVERED; + tsm->stat = SAS_PHY_DOWN; + /* + * libsas will use dev->port, should + * not call task_done for sata + */ + if (dev->dev_type != SAS_SATA_DEV) + task->task_done(task); + return rc; + } + + if (DEV_IS_GONE(mvi_dev)) { + if (mvi_dev) + mv_dprintk("device %d not ready.\n", + mvi_dev->device_id); + else + mv_dprintk("device %016llx not ready.\n", + SAS_ADDR(dev->sas_addr)); + + rc = SAS_PHY_DOWN; + return rc; + } + tei.port = dev->port->lldd_port; + if (tei.port && !tei.port->port_attached && !tmf) { + if (sas_protocol_ata(task->task_proto)) { + struct task_status_struct *ts = &task->task_status; + mv_dprintk("SATA/STP port %d does not attach" + "device.\n", dev->port->id); + ts->resp = SAS_TASK_COMPLETE; + ts->stat = SAS_PHY_DOWN; + + task->task_done(task); + + } else { + struct task_status_struct *ts = &task->task_status; + mv_dprintk("SAS port %d does not attach" + "device.\n", dev->port->id); + ts->resp = SAS_TASK_UNDELIVERED; + ts->stat = SAS_PHY_DOWN; + task->task_done(task); + } + return rc; + } + + if (!sas_protocol_ata(task->task_proto)) { + if (task->num_scatter) { + n_elem = dma_map_sg(mvi->dev, + task->scatter, + task->num_scatter, + task->data_dir); + if (!n_elem) { + rc = -ENOMEM; + goto prep_out; + } + } + } else { + n_elem = task->num_scatter; + } + + rc = mvs_tag_alloc(mvi, &tag); + if (rc) + goto err_out; + + slot = &mvi->slot_info[tag]; + + task->lldd_task = NULL; + slot->n_elem = n_elem; + slot->slot_tag = tag; + + slot->buf = dma_pool_zalloc(mvi->dma_pool, GFP_ATOMIC, &slot->buf_dma); + if (!slot->buf) { + rc = -ENOMEM; + goto err_out_tag; + } + + tei.task = task; + tei.hdr = &mvi->slot[tag]; + tei.tag = tag; + tei.n_elem = n_elem; + switch (task->task_proto) { + case SAS_PROTOCOL_SMP: + rc = mvs_task_prep_smp(mvi, &tei); + break; + case SAS_PROTOCOL_SSP: + rc = mvs_task_prep_ssp(mvi, &tei, is_tmf, tmf); + break; + case SAS_PROTOCOL_SATA: + case SAS_PROTOCOL_STP: + case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP: + rc = mvs_task_prep_ata(mvi, &tei); + break; + default: + dev_printk(KERN_ERR, mvi->dev, + "unknown sas_task proto: 0x%x\n", + task->task_proto); + rc = -EINVAL; + break; + } + + if (rc) { + mv_dprintk("rc is %x\n", rc); + goto err_out_slot_buf; + } + slot->task = task; + slot->port = tei.port; + task->lldd_task = slot; + list_add_tail(&slot->entry, &tei.port->list); + spin_lock(&task->task_state_lock); + task->task_state_flags |= SAS_TASK_AT_INITIATOR; + spin_unlock(&task->task_state_lock); + + mvi_dev->running_req++; + ++(*pass); + mvi->tx_prod = (mvi->tx_prod + 1) & (MVS_CHIP_SLOT_SZ - 1); + + return rc; + +err_out_slot_buf: + dma_pool_free(mvi->dma_pool, slot->buf, slot->buf_dma); +err_out_tag: + mvs_tag_free(mvi, tag); +err_out: + + dev_printk(KERN_ERR, mvi->dev, "mvsas prep failed[%d]!\n", rc); + if (!sas_protocol_ata(task->task_proto)) + if (n_elem) + dma_unmap_sg(mvi->dev, task->scatter, n_elem, + task->data_dir); +prep_out: + return rc; +} + +static int mvs_task_exec(struct sas_task *task, gfp_t gfp_flags, + struct completion *completion, int is_tmf, + struct mvs_tmf_task *tmf) +{ + struct mvs_info *mvi = NULL; + u32 rc = 0; + u32 pass = 0; + unsigned long flags = 0; + + mvi = ((struct mvs_device *)task->dev->lldd_dev)->mvi_info; + + spin_lock_irqsave(&mvi->lock, flags); + rc = mvs_task_prep(task, mvi, is_tmf, tmf, &pass); + if (rc) + dev_printk(KERN_ERR, mvi->dev, "mvsas exec failed[%d]!\n", rc); + + if (likely(pass)) + MVS_CHIP_DISP->start_delivery(mvi, (mvi->tx_prod - 1) & + (MVS_CHIP_SLOT_SZ - 1)); + spin_unlock_irqrestore(&mvi->lock, flags); + + return rc; +} + +int mvs_queue_command(struct sas_task *task, gfp_t gfp_flags) +{ + return mvs_task_exec(task, gfp_flags, NULL, 0, NULL); +} + +static void mvs_slot_free(struct mvs_info *mvi, u32 rx_desc) +{ + u32 slot_idx = rx_desc & RXQ_SLOT_MASK; + mvs_tag_clear(mvi, slot_idx); +} + +static void mvs_slot_task_free(struct mvs_info *mvi, struct sas_task *task, + struct mvs_slot_info *slot, u32 slot_idx) +{ + if (!slot) + return; + if (!slot->task) + return; + if (!sas_protocol_ata(task->task_proto)) + if (slot->n_elem) + dma_unmap_sg(mvi->dev, task->scatter, + slot->n_elem, task->data_dir); + + switch (task->task_proto) { + case SAS_PROTOCOL_SMP: + dma_unmap_sg(mvi->dev, &task->smp_task.smp_resp, 1, + DMA_FROM_DEVICE); + dma_unmap_sg(mvi->dev, &task->smp_task.smp_req, 1, + DMA_TO_DEVICE); + break; + + case SAS_PROTOCOL_SATA: + case SAS_PROTOCOL_STP: + case SAS_PROTOCOL_SSP: + default: + /* do nothing */ + break; + } + + if (slot->buf) { + dma_pool_free(mvi->dma_pool, slot->buf, slot->buf_dma); + slot->buf = NULL; + } + list_del_init(&slot->entry); + task->lldd_task = NULL; + slot->task = NULL; + slot->port = NULL; + slot->slot_tag = 0xFFFFFFFF; + mvs_slot_free(mvi, slot_idx); +} + +static void mvs_update_wideport(struct mvs_info *mvi, int phy_no) +{ + struct mvs_phy *phy = &mvi->phy[phy_no]; + struct mvs_port *port = phy->port; + int j, no; + + for_each_phy(port->wide_port_phymap, j, no) { + if (j & 1) { + MVS_CHIP_DISP->write_port_cfg_addr(mvi, no, + PHYR_WIDE_PORT); + MVS_CHIP_DISP->write_port_cfg_data(mvi, no, + port->wide_port_phymap); + } else { + MVS_CHIP_DISP->write_port_cfg_addr(mvi, no, + PHYR_WIDE_PORT); + MVS_CHIP_DISP->write_port_cfg_data(mvi, no, + 0); + } + } +} + +static u32 mvs_is_phy_ready(struct mvs_info *mvi, int i) +{ + u32 tmp; + struct mvs_phy *phy = &mvi->phy[i]; + struct mvs_port *port = phy->port; + + tmp = MVS_CHIP_DISP->read_phy_ctl(mvi, i); + if ((tmp & PHY_READY_MASK) && !(phy->irq_status & PHYEV_POOF)) { + if (!port) + phy->phy_attached = 1; + return tmp; + } + + if (port) { + if (phy->phy_type & PORT_TYPE_SAS) { + port->wide_port_phymap &= ~(1U << i); + if (!port->wide_port_phymap) + port->port_attached = 0; + mvs_update_wideport(mvi, i); + } else if (phy->phy_type & PORT_TYPE_SATA) + port->port_attached = 0; + phy->port = NULL; + phy->phy_attached = 0; + phy->phy_type &= ~(PORT_TYPE_SAS | PORT_TYPE_SATA); + } + return 0; +} + +static void *mvs_get_d2h_reg(struct mvs_info *mvi, int i, void *buf) +{ + u32 *s = (u32 *) buf; + + if (!s) + return NULL; + + MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG3); + s[3] = cpu_to_le32(MVS_CHIP_DISP->read_port_cfg_data(mvi, i)); + + MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG2); + s[2] = cpu_to_le32(MVS_CHIP_DISP->read_port_cfg_data(mvi, i)); + + MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG1); + s[1] = cpu_to_le32(MVS_CHIP_DISP->read_port_cfg_data(mvi, i)); + + MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG0); + s[0] = cpu_to_le32(MVS_CHIP_DISP->read_port_cfg_data(mvi, i)); + + if (((s[1] & 0x00FFFFFF) == 0x00EB1401) && (*(u8 *)&s[3] == 0x01)) + s[1] = 0x00EB1401 | (*((u8 *)&s[1] + 3) & 0x10); + + return s; +} + +static u32 mvs_is_sig_fis_received(u32 irq_status) +{ + return irq_status & PHYEV_SIG_FIS; +} + +static void mvs_sig_remove_timer(struct mvs_phy *phy) +{ + if (phy->timer.function) + del_timer(&phy->timer); + phy->timer.function = NULL; +} + +void mvs_update_phyinfo(struct mvs_info *mvi, int i, int get_st) +{ + struct mvs_phy *phy = &mvi->phy[i]; + struct sas_identify_frame *id; + + id = (struct sas_identify_frame *)phy->frame_rcvd; + + if (get_st) { + phy->irq_status = MVS_CHIP_DISP->read_port_irq_stat(mvi, i); + phy->phy_status = mvs_is_phy_ready(mvi, i); + } + + if (phy->phy_status) { + int oob_done = 0; + struct asd_sas_phy *sas_phy = &mvi->phy[i].sas_phy; + + oob_done = MVS_CHIP_DISP->oob_done(mvi, i); + + MVS_CHIP_DISP->fix_phy_info(mvi, i, id); + if (phy->phy_type & PORT_TYPE_SATA) { + phy->identify.target_port_protocols = SAS_PROTOCOL_STP; + if (mvs_is_sig_fis_received(phy->irq_status)) { + mvs_sig_remove_timer(phy); + phy->phy_attached = 1; + phy->att_dev_sas_addr = + i + mvi->id * mvi->chip->n_phy; + if (oob_done) + sas_phy->oob_mode = SATA_OOB_MODE; + phy->frame_rcvd_size = + sizeof(struct dev_to_host_fis); + mvs_get_d2h_reg(mvi, i, id); + } else { + u32 tmp; + dev_printk(KERN_DEBUG, mvi->dev, + "Phy%d : No sig fis\n", i); + tmp = MVS_CHIP_DISP->read_port_irq_mask(mvi, i); + MVS_CHIP_DISP->write_port_irq_mask(mvi, i, + tmp | PHYEV_SIG_FIS); + phy->phy_attached = 0; + phy->phy_type &= ~PORT_TYPE_SATA; + goto out_done; + } + } else if (phy->phy_type & PORT_TYPE_SAS + || phy->att_dev_info & PORT_SSP_INIT_MASK) { + phy->phy_attached = 1; + phy->identify.device_type = + phy->att_dev_info & PORT_DEV_TYPE_MASK; + + if (phy->identify.device_type == SAS_END_DEVICE) + phy->identify.target_port_protocols = + SAS_PROTOCOL_SSP; + else if (phy->identify.device_type != SAS_PHY_UNUSED) + phy->identify.target_port_protocols = + SAS_PROTOCOL_SMP; + if (oob_done) + sas_phy->oob_mode = SAS_OOB_MODE; + phy->frame_rcvd_size = + sizeof(struct sas_identify_frame); + } + memcpy(sas_phy->attached_sas_addr, + &phy->att_dev_sas_addr, SAS_ADDR_SIZE); + + if (MVS_CHIP_DISP->phy_work_around) + MVS_CHIP_DISP->phy_work_around(mvi, i); + } + mv_dprintk("phy %d attach dev info is %x\n", + i + mvi->id * mvi->chip->n_phy, phy->att_dev_info); + mv_dprintk("phy %d attach sas addr is %llx\n", + i + mvi->id * mvi->chip->n_phy, phy->att_dev_sas_addr); +out_done: + if (get_st) + MVS_CHIP_DISP->write_port_irq_stat(mvi, i, phy->irq_status); +} + +static void mvs_port_notify_formed(struct asd_sas_phy *sas_phy, int lock) +{ + struct sas_ha_struct *sas_ha = sas_phy->ha; + struct mvs_info *mvi = NULL; int i = 0, hi; + struct mvs_phy *phy = sas_phy->lldd_phy; + struct asd_sas_port *sas_port = sas_phy->port; + struct mvs_port *port; + unsigned long flags = 0; + if (!sas_port) + return; + + while (sas_ha->sas_phy[i]) { + if (sas_ha->sas_phy[i] == sas_phy) + break; + i++; + } + hi = i/((struct mvs_prv_info *)sas_ha->lldd_ha)->n_phy; + mvi = ((struct mvs_prv_info *)sas_ha->lldd_ha)->mvi[hi]; + if (i >= mvi->chip->n_phy) + port = &mvi->port[i - mvi->chip->n_phy]; + else + port = &mvi->port[i]; + if (lock) + spin_lock_irqsave(&mvi->lock, flags); + port->port_attached = 1; + phy->port = port; + sas_port->lldd_port = port; + if (phy->phy_type & PORT_TYPE_SAS) { + port->wide_port_phymap = sas_port->phy_mask; + mv_printk("set wide port phy map %x\n", sas_port->phy_mask); + mvs_update_wideport(mvi, sas_phy->id); + + /* direct attached SAS device */ + if (phy->att_dev_info & PORT_SSP_TRGT_MASK) { + MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_PHY_STAT); + MVS_CHIP_DISP->write_port_cfg_data(mvi, i, 0x04); + } + } + if (lock) + spin_unlock_irqrestore(&mvi->lock, flags); +} + +static void mvs_port_notify_deformed(struct asd_sas_phy *sas_phy, int lock) +{ + struct domain_device *dev; + struct mvs_phy *phy = sas_phy->lldd_phy; + struct mvs_info *mvi = phy->mvi; + struct asd_sas_port *port = sas_phy->port; + int phy_no = 0; + + while (phy != &mvi->phy[phy_no]) { + phy_no++; + if (phy_no >= MVS_MAX_PHYS) + return; + } + list_for_each_entry(dev, &port->dev_list, dev_list_node) + mvs_do_release_task(phy->mvi, phy_no, dev); + +} + + +void mvs_port_formed(struct asd_sas_phy *sas_phy) +{ + mvs_port_notify_formed(sas_phy, 1); +} + +void mvs_port_deformed(struct asd_sas_phy *sas_phy) +{ + mvs_port_notify_deformed(sas_phy, 1); +} + +static struct mvs_device *mvs_alloc_dev(struct mvs_info *mvi) +{ + u32 dev; + for (dev = 0; dev < MVS_MAX_DEVICES; dev++) { + if (mvi->devices[dev].dev_type == SAS_PHY_UNUSED) { + mvi->devices[dev].device_id = dev; + return &mvi->devices[dev]; + } + } + + if (dev == MVS_MAX_DEVICES) + mv_printk("max support %d devices, ignore ..\n", + MVS_MAX_DEVICES); + + return NULL; +} + +static void mvs_free_dev(struct mvs_device *mvi_dev) +{ + u32 id = mvi_dev->device_id; + memset(mvi_dev, 0, sizeof(*mvi_dev)); + mvi_dev->device_id = id; + mvi_dev->dev_type = SAS_PHY_UNUSED; + mvi_dev->dev_status = MVS_DEV_NORMAL; + mvi_dev->taskfileset = MVS_ID_NOT_MAPPED; +} + +static int mvs_dev_found_notify(struct domain_device *dev, int lock) +{ + unsigned long flags = 0; + int res = 0; + struct mvs_info *mvi = NULL; + struct domain_device *parent_dev = dev->parent; + struct mvs_device *mvi_device; + + mvi = mvs_find_dev_mvi(dev); + + if (lock) + spin_lock_irqsave(&mvi->lock, flags); + + mvi_device = mvs_alloc_dev(mvi); + if (!mvi_device) { + res = -1; + goto found_out; + } + dev->lldd_dev = mvi_device; + mvi_device->dev_status = MVS_DEV_NORMAL; + mvi_device->dev_type = dev->dev_type; + mvi_device->mvi_info = mvi; + mvi_device->sas_device = dev; + if (parent_dev && dev_is_expander(parent_dev->dev_type)) { + int phy_id; + u8 phy_num = parent_dev->ex_dev.num_phys; + struct ex_phy *phy; + for (phy_id = 0; phy_id < phy_num; phy_id++) { + phy = &parent_dev->ex_dev.ex_phy[phy_id]; + if (SAS_ADDR(phy->attached_sas_addr) == + SAS_ADDR(dev->sas_addr)) { + mvi_device->attached_phy = phy_id; + break; + } + } + + if (phy_id == phy_num) { + mv_printk("Error: no attached dev:%016llx" + "at ex:%016llx.\n", + SAS_ADDR(dev->sas_addr), + SAS_ADDR(parent_dev->sas_addr)); + res = -1; + } + } + +found_out: + if (lock) + spin_unlock_irqrestore(&mvi->lock, flags); + return res; +} + +int mvs_dev_found(struct domain_device *dev) +{ + return mvs_dev_found_notify(dev, 1); +} + +static void mvs_dev_gone_notify(struct domain_device *dev) +{ + unsigned long flags = 0; + struct mvs_device *mvi_dev = dev->lldd_dev; + struct mvs_info *mvi; + + if (!mvi_dev) { + mv_dprintk("found dev has gone.\n"); + return; + } + + mvi = mvi_dev->mvi_info; + + spin_lock_irqsave(&mvi->lock, flags); + + mv_dprintk("found dev[%d:%x] is gone.\n", + mvi_dev->device_id, mvi_dev->dev_type); + mvs_release_task(mvi, dev); + mvs_free_reg_set(mvi, mvi_dev); + mvs_free_dev(mvi_dev); + + dev->lldd_dev = NULL; + mvi_dev->sas_device = NULL; + + spin_unlock_irqrestore(&mvi->lock, flags); +} + + +void mvs_dev_gone(struct domain_device *dev) +{ + mvs_dev_gone_notify(dev); +} + +static void mvs_task_done(struct sas_task *task) +{ + if (!del_timer(&task->slow_task->timer)) + return; + complete(&task->slow_task->completion); +} + +static void mvs_tmf_timedout(struct timer_list *t) +{ + struct sas_task_slow *slow = from_timer(slow, t, timer); + struct sas_task *task = slow->task; + + task->task_state_flags |= SAS_TASK_STATE_ABORTED; + complete(&task->slow_task->completion); +} + +#define MVS_TASK_TIMEOUT 20 +static int mvs_exec_internal_tmf_task(struct domain_device *dev, + void *parameter, u32 para_len, struct mvs_tmf_task *tmf) +{ + int res, retry; + struct sas_task *task = NULL; + + for (retry = 0; retry < 3; retry++) { + task = sas_alloc_slow_task(GFP_KERNEL); + if (!task) + return -ENOMEM; + + task->dev = dev; + task->task_proto = dev->tproto; + + memcpy(&task->ssp_task, parameter, para_len); + task->task_done = mvs_task_done; + + task->slow_task->timer.function = mvs_tmf_timedout; + task->slow_task->timer.expires = jiffies + MVS_TASK_TIMEOUT*HZ; + add_timer(&task->slow_task->timer); + + res = mvs_task_exec(task, GFP_KERNEL, NULL, 1, tmf); + + if (res) { + del_timer(&task->slow_task->timer); + mv_printk("executing internal task failed:%d\n", res); + goto ex_err; + } + + wait_for_completion(&task->slow_task->completion); + res = TMF_RESP_FUNC_FAILED; + /* Even TMF timed out, return direct. */ + if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { + if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { + mv_printk("TMF task[%x] timeout.\n", tmf->tmf); + goto ex_err; + } + } + + if (task->task_status.resp == SAS_TASK_COMPLETE && + task->task_status.stat == SAS_SAM_STAT_GOOD) { + res = TMF_RESP_FUNC_COMPLETE; + break; + } + + if (task->task_status.resp == SAS_TASK_COMPLETE && + task->task_status.stat == SAS_DATA_UNDERRUN) { + /* no error, but return the number of bytes of + * underrun */ + res = task->task_status.residual; + break; + } + + if (task->task_status.resp == SAS_TASK_COMPLETE && + task->task_status.stat == SAS_DATA_OVERRUN) { + mv_dprintk("blocked task error.\n"); + res = -EMSGSIZE; + break; + } else { + mv_dprintk(" task to dev %016llx response: 0x%x " + "status 0x%x\n", + SAS_ADDR(dev->sas_addr), + task->task_status.resp, + task->task_status.stat); + sas_free_task(task); + task = NULL; + + } + } +ex_err: + BUG_ON(retry == 3 && task != NULL); + sas_free_task(task); + return res; +} + +static int mvs_debug_issue_ssp_tmf(struct domain_device *dev, + u8 *lun, struct mvs_tmf_task *tmf) +{ + struct sas_ssp_task ssp_task; + if (!(dev->tproto & SAS_PROTOCOL_SSP)) + return TMF_RESP_FUNC_ESUPP; + + memcpy(ssp_task.LUN, lun, 8); + + return mvs_exec_internal_tmf_task(dev, &ssp_task, + sizeof(ssp_task), tmf); +} + + +/* Standard mandates link reset for ATA (type 0) + and hard reset for SSP (type 1) , only for RECOVERY */ +static int mvs_debug_I_T_nexus_reset(struct domain_device *dev) +{ + int rc; + struct sas_phy *phy = sas_get_local_phy(dev); + int reset_type = (dev->dev_type == SAS_SATA_DEV || + (dev->tproto & SAS_PROTOCOL_STP)) ? 0 : 1; + rc = sas_phy_reset(phy, reset_type); + sas_put_local_phy(phy); + msleep(2000); + return rc; +} + +/* mandatory SAM-3 */ +int mvs_lu_reset(struct domain_device *dev, u8 *lun) +{ + unsigned long flags; + int rc = TMF_RESP_FUNC_FAILED; + struct mvs_tmf_task tmf_task; + struct mvs_device * mvi_dev = dev->lldd_dev; + struct mvs_info *mvi = mvi_dev->mvi_info; + + tmf_task.tmf = TMF_LU_RESET; + mvi_dev->dev_status = MVS_DEV_EH; + rc = mvs_debug_issue_ssp_tmf(dev, lun, &tmf_task); + if (rc == TMF_RESP_FUNC_COMPLETE) { + spin_lock_irqsave(&mvi->lock, flags); + mvs_release_task(mvi, dev); + spin_unlock_irqrestore(&mvi->lock, flags); + } + /* If failed, fall-through I_T_Nexus reset */ + mv_printk("%s for device[%x]:rc= %d\n", __func__, + mvi_dev->device_id, rc); + return rc; +} + +int mvs_I_T_nexus_reset(struct domain_device *dev) +{ + unsigned long flags; + int rc = TMF_RESP_FUNC_FAILED; + struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev; + struct mvs_info *mvi = mvi_dev->mvi_info; + + if (mvi_dev->dev_status != MVS_DEV_EH) + return TMF_RESP_FUNC_COMPLETE; + else + mvi_dev->dev_status = MVS_DEV_NORMAL; + rc = mvs_debug_I_T_nexus_reset(dev); + mv_printk("%s for device[%x]:rc= %d\n", + __func__, mvi_dev->device_id, rc); + + spin_lock_irqsave(&mvi->lock, flags); + mvs_release_task(mvi, dev); + spin_unlock_irqrestore(&mvi->lock, flags); + + return rc; +} +/* optional SAM-3 */ +int mvs_query_task(struct sas_task *task) +{ + u32 tag; + struct scsi_lun lun; + struct mvs_tmf_task tmf_task; + int rc = TMF_RESP_FUNC_FAILED; + + if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) { + struct scsi_cmnd * cmnd = (struct scsi_cmnd *)task->uldd_task; + struct domain_device *dev = task->dev; + struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev; + struct mvs_info *mvi = mvi_dev->mvi_info; + + int_to_scsilun(cmnd->device->lun, &lun); + rc = mvs_find_tag(mvi, task, &tag); + if (rc == 0) { + rc = TMF_RESP_FUNC_FAILED; + return rc; + } + + tmf_task.tmf = TMF_QUERY_TASK; + tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag); + + rc = mvs_debug_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task); + switch (rc) { + /* The task is still in Lun, release it then */ + case TMF_RESP_FUNC_SUCC: + /* The task is not in Lun or failed, reset the phy */ + case TMF_RESP_FUNC_FAILED: + case TMF_RESP_FUNC_COMPLETE: + break; + } + } + mv_printk("%s:rc= %d\n", __func__, rc); + return rc; +} + +/* mandatory SAM-3, still need free task/slot info */ +int mvs_abort_task(struct sas_task *task) +{ + struct scsi_lun lun; + struct mvs_tmf_task tmf_task; + struct domain_device *dev = task->dev; + struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev; + struct mvs_info *mvi; + int rc = TMF_RESP_FUNC_FAILED; + unsigned long flags; + u32 tag; + + if (!mvi_dev) { + mv_printk("Device has removed\n"); + return TMF_RESP_FUNC_FAILED; + } + + mvi = mvi_dev->mvi_info; + + spin_lock_irqsave(&task->task_state_lock, flags); + if (task->task_state_flags & SAS_TASK_STATE_DONE) { + spin_unlock_irqrestore(&task->task_state_lock, flags); + rc = TMF_RESP_FUNC_COMPLETE; + goto out; + } + spin_unlock_irqrestore(&task->task_state_lock, flags); + mvi_dev->dev_status = MVS_DEV_EH; + if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) { + struct scsi_cmnd * cmnd = (struct scsi_cmnd *)task->uldd_task; + + int_to_scsilun(cmnd->device->lun, &lun); + rc = mvs_find_tag(mvi, task, &tag); + if (rc == 0) { + mv_printk("No such tag in %s\n", __func__); + rc = TMF_RESP_FUNC_FAILED; + return rc; + } + + tmf_task.tmf = TMF_ABORT_TASK; + tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag); + + rc = mvs_debug_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task); + + /* if successful, clear the task and callback forwards.*/ + if (rc == TMF_RESP_FUNC_COMPLETE) { + u32 slot_no; + struct mvs_slot_info *slot; + + if (task->lldd_task) { + slot = task->lldd_task; + slot_no = (u32) (slot - mvi->slot_info); + spin_lock_irqsave(&mvi->lock, flags); + mvs_slot_complete(mvi, slot_no, 1); + spin_unlock_irqrestore(&mvi->lock, flags); + } + } + + } else if (task->task_proto & SAS_PROTOCOL_SATA || + task->task_proto & SAS_PROTOCOL_STP) { + if (SAS_SATA_DEV == dev->dev_type) { + struct mvs_slot_info *slot = task->lldd_task; + u32 slot_idx = (u32)(slot - mvi->slot_info); + mv_dprintk("mvs_abort_task() mvi=%p task=%p " + "slot=%p slot_idx=x%x\n", + mvi, task, slot, slot_idx); + task->task_state_flags |= SAS_TASK_STATE_ABORTED; + mvs_slot_task_free(mvi, task, slot, slot_idx); + rc = TMF_RESP_FUNC_COMPLETE; + goto out; + } + + } +out: + if (rc != TMF_RESP_FUNC_COMPLETE) + mv_printk("%s:rc= %d\n", __func__, rc); + return rc; +} + +int mvs_abort_task_set(struct domain_device *dev, u8 *lun) +{ + int rc; + struct mvs_tmf_task tmf_task; + + tmf_task.tmf = TMF_ABORT_TASK_SET; + rc = mvs_debug_issue_ssp_tmf(dev, lun, &tmf_task); + + return rc; +} + +int mvs_clear_aca(struct domain_device *dev, u8 *lun) +{ + int rc = TMF_RESP_FUNC_FAILED; + struct mvs_tmf_task tmf_task; + + tmf_task.tmf = TMF_CLEAR_ACA; + rc = mvs_debug_issue_ssp_tmf(dev, lun, &tmf_task); + + return rc; +} + +int mvs_clear_task_set(struct domain_device *dev, u8 *lun) +{ + int rc = TMF_RESP_FUNC_FAILED; + struct mvs_tmf_task tmf_task; + + tmf_task.tmf = TMF_CLEAR_TASK_SET; + rc = mvs_debug_issue_ssp_tmf(dev, lun, &tmf_task); + + return rc; +} + +static int mvs_sata_done(struct mvs_info *mvi, struct sas_task *task, + u32 slot_idx, int err) +{ + struct mvs_device *mvi_dev = task->dev->lldd_dev; + struct task_status_struct *tstat = &task->task_status; + struct ata_task_resp *resp = (struct ata_task_resp *)tstat->buf; + int stat = SAM_STAT_GOOD; + + + resp->frame_len = sizeof(struct dev_to_host_fis); + memcpy(&resp->ending_fis[0], + SATA_RECEIVED_D2H_FIS(mvi_dev->taskfileset), + sizeof(struct dev_to_host_fis)); + tstat->buf_valid_size = sizeof(*resp); + if (unlikely(err)) { + if (unlikely(err & CMD_ISS_STPD)) + stat = SAS_OPEN_REJECT; + else + stat = SAS_PROTO_RESPONSE; + } + + return stat; +} + +static void mvs_set_sense(u8 *buffer, int len, int d_sense, + int key, int asc, int ascq) +{ + memset(buffer, 0, len); + + if (d_sense) { + /* Descriptor format */ + if (len < 4) { + mv_printk("Length %d of sense buffer too small to " + "fit sense %x:%x:%x", len, key, asc, ascq); + } + + buffer[0] = 0x72; /* Response Code */ + if (len > 1) + buffer[1] = key; /* Sense Key */ + if (len > 2) + buffer[2] = asc; /* ASC */ + if (len > 3) + buffer[3] = ascq; /* ASCQ */ + } else { + if (len < 14) { + mv_printk("Length %d of sense buffer too small to " + "fit sense %x:%x:%x", len, key, asc, ascq); + } + + buffer[0] = 0x70; /* Response Code */ + if (len > 2) + buffer[2] = key; /* Sense Key */ + if (len > 7) + buffer[7] = 0x0a; /* Additional Sense Length */ + if (len > 12) + buffer[12] = asc; /* ASC */ + if (len > 13) + buffer[13] = ascq; /* ASCQ */ + } + + return; +} + +static void mvs_fill_ssp_resp_iu(struct ssp_response_iu *iu, + u8 key, u8 asc, u8 asc_q) +{ + iu->datapres = 2; + iu->response_data_len = 0; + iu->sense_data_len = 17; + iu->status = 02; + mvs_set_sense(iu->sense_data, 17, 0, + key, asc, asc_q); +} + +static int mvs_slot_err(struct mvs_info *mvi, struct sas_task *task, + u32 slot_idx) +{ + struct mvs_slot_info *slot = &mvi->slot_info[slot_idx]; + int stat; + u32 err_dw0 = le32_to_cpu(*(u32 *)slot->response); + u32 err_dw1 = le32_to_cpu(*((u32 *)slot->response + 1)); + u32 tfs = 0; + enum mvs_port_type type = PORT_TYPE_SAS; + + if (err_dw0 & CMD_ISS_STPD) + MVS_CHIP_DISP->issue_stop(mvi, type, tfs); + + MVS_CHIP_DISP->command_active(mvi, slot_idx); + + stat = SAM_STAT_CHECK_CONDITION; + switch (task->task_proto) { + case SAS_PROTOCOL_SSP: + { + stat = SAS_ABORTED_TASK; + if ((err_dw0 & NO_DEST) || err_dw1 & bit(31)) { + struct ssp_response_iu *iu = slot->response + + sizeof(struct mvs_err_info); + mvs_fill_ssp_resp_iu(iu, NOT_READY, 0x04, 01); + sas_ssp_task_response(mvi->dev, task, iu); + stat = SAM_STAT_CHECK_CONDITION; + } + if (err_dw1 & bit(31)) + mv_printk("reuse same slot, retry command.\n"); + break; + } + case SAS_PROTOCOL_SMP: + stat = SAM_STAT_CHECK_CONDITION; + break; + + case SAS_PROTOCOL_SATA: + case SAS_PROTOCOL_STP: + case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP: + { + task->ata_task.use_ncq = 0; + stat = SAS_PROTO_RESPONSE; + mvs_sata_done(mvi, task, slot_idx, err_dw0); + } + break; + default: + break; + } + + return stat; +} + +int mvs_slot_complete(struct mvs_info *mvi, u32 rx_desc, u32 flags) +{ + u32 slot_idx = rx_desc & RXQ_SLOT_MASK; + struct mvs_slot_info *slot = &mvi->slot_info[slot_idx]; + struct sas_task *task = slot->task; + struct mvs_device *mvi_dev = NULL; + struct task_status_struct *tstat; + struct domain_device *dev; + u32 aborted; + + void *to; + enum exec_status sts; + + if (unlikely(!task || !task->lldd_task || !task->dev)) + return -1; + + tstat = &task->task_status; + dev = task->dev; + mvi_dev = dev->lldd_dev; + + spin_lock(&task->task_state_lock); + task->task_state_flags &= + ~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR); + task->task_state_flags |= SAS_TASK_STATE_DONE; + /* race condition*/ + aborted = task->task_state_flags & SAS_TASK_STATE_ABORTED; + spin_unlock(&task->task_state_lock); + + memset(tstat, 0, sizeof(*tstat)); + tstat->resp = SAS_TASK_COMPLETE; + + if (unlikely(aborted)) { + tstat->stat = SAS_ABORTED_TASK; + if (mvi_dev && mvi_dev->running_req) + mvi_dev->running_req--; + if (sas_protocol_ata(task->task_proto)) + mvs_free_reg_set(mvi, mvi_dev); + + mvs_slot_task_free(mvi, task, slot, slot_idx); + return -1; + } + + /* when no device attaching, go ahead and complete by error handling*/ + if (unlikely(!mvi_dev || flags)) { + if (!mvi_dev) + mv_dprintk("port has not device.\n"); + tstat->stat = SAS_PHY_DOWN; + goto out; + } + + /* + * error info record present; slot->response is 32 bit aligned but may + * not be 64 bit aligned, so check for zero in two 32 bit reads + */ + if (unlikely((rx_desc & RXQ_ERR) + && (*((u32 *)slot->response) + || *(((u32 *)slot->response) + 1)))) { + mv_dprintk("port %d slot %d rx_desc %X has error info" + "%016llX.\n", slot->port->sas_port.id, slot_idx, + rx_desc, get_unaligned_le64(slot->response)); + tstat->stat = mvs_slot_err(mvi, task, slot_idx); + tstat->resp = SAS_TASK_COMPLETE; + goto out; + } + + switch (task->task_proto) { + case SAS_PROTOCOL_SSP: + /* hw says status == 0, datapres == 0 */ + if (rx_desc & RXQ_GOOD) { + tstat->stat = SAS_SAM_STAT_GOOD; + tstat->resp = SAS_TASK_COMPLETE; + } + /* response frame present */ + else if (rx_desc & RXQ_RSP) { + struct ssp_response_iu *iu = slot->response + + sizeof(struct mvs_err_info); + sas_ssp_task_response(mvi->dev, task, iu); + } else + tstat->stat = SAS_SAM_STAT_CHECK_CONDITION; + break; + + case SAS_PROTOCOL_SMP: { + struct scatterlist *sg_resp = &task->smp_task.smp_resp; + tstat->stat = SAS_SAM_STAT_GOOD; + to = kmap_atomic(sg_page(sg_resp)); + memcpy(to + sg_resp->offset, + slot->response + sizeof(struct mvs_err_info), + sg_dma_len(sg_resp)); + kunmap_atomic(to); + break; + } + + case SAS_PROTOCOL_SATA: + case SAS_PROTOCOL_STP: + case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP: { + tstat->stat = mvs_sata_done(mvi, task, slot_idx, 0); + break; + } + + default: + tstat->stat = SAS_SAM_STAT_CHECK_CONDITION; + break; + } + if (!slot->port->port_attached) { + mv_dprintk("port %d has removed.\n", slot->port->sas_port.id); + tstat->stat = SAS_PHY_DOWN; + } + + +out: + if (mvi_dev && mvi_dev->running_req) { + mvi_dev->running_req--; + if (sas_protocol_ata(task->task_proto) && !mvi_dev->running_req) + mvs_free_reg_set(mvi, mvi_dev); + } + mvs_slot_task_free(mvi, task, slot, slot_idx); + sts = tstat->stat; + + spin_unlock(&mvi->lock); + if (task->task_done) + task->task_done(task); + + spin_lock(&mvi->lock); + + return sts; +} + +void mvs_do_release_task(struct mvs_info *mvi, + int phy_no, struct domain_device *dev) +{ + u32 slot_idx; + struct mvs_phy *phy; + struct mvs_port *port; + struct mvs_slot_info *slot, *slot2; + + phy = &mvi->phy[phy_no]; + port = phy->port; + if (!port) + return; + /* clean cmpl queue in case request is already finished */ + mvs_int_rx(mvi, false); + + + + list_for_each_entry_safe(slot, slot2, &port->list, entry) { + struct sas_task *task; + slot_idx = (u32) (slot - mvi->slot_info); + task = slot->task; + + if (dev && task->dev != dev) + continue; + + mv_printk("Release slot [%x] tag[%x], task [%p]:\n", + slot_idx, slot->slot_tag, task); + MVS_CHIP_DISP->command_active(mvi, slot_idx); + + mvs_slot_complete(mvi, slot_idx, 1); + } +} + +void mvs_release_task(struct mvs_info *mvi, + struct domain_device *dev) +{ + int i, phyno[WIDE_PORT_MAX_PHY], num; + num = mvs_find_dev_phyno(dev, phyno); + for (i = 0; i < num; i++) + mvs_do_release_task(mvi, phyno[i], dev); +} + +static void mvs_phy_disconnected(struct mvs_phy *phy) +{ + phy->phy_attached = 0; + phy->att_dev_info = 0; + phy->att_dev_sas_addr = 0; +} + +static void mvs_work_queue(struct work_struct *work) +{ + struct delayed_work *dw = container_of(work, struct delayed_work, work); + struct mvs_wq *mwq = container_of(dw, struct mvs_wq, work_q); + struct mvs_info *mvi = mwq->mvi; + unsigned long flags; + u32 phy_no = (unsigned long) mwq->data; + struct mvs_phy *phy = &mvi->phy[phy_no]; + struct asd_sas_phy *sas_phy = &phy->sas_phy; + + spin_lock_irqsave(&mvi->lock, flags); + if (mwq->handler & PHY_PLUG_EVENT) { + + if (phy->phy_event & PHY_PLUG_OUT) { + u32 tmp; + + tmp = MVS_CHIP_DISP->read_phy_ctl(mvi, phy_no); + phy->phy_event &= ~PHY_PLUG_OUT; + if (!(tmp & PHY_READY_MASK)) { + sas_phy_disconnected(sas_phy); + mvs_phy_disconnected(phy); + sas_notify_phy_event_gfp(sas_phy, + PHYE_LOSS_OF_SIGNAL, GFP_ATOMIC); + mv_dprintk("phy%d Removed Device\n", phy_no); + } else { + MVS_CHIP_DISP->detect_porttype(mvi, phy_no); + mvs_update_phyinfo(mvi, phy_no, 1); + mvs_bytes_dmaed(mvi, phy_no, GFP_ATOMIC); + mvs_port_notify_formed(sas_phy, 0); + mv_dprintk("phy%d Attached Device\n", phy_no); + } + } + } else if (mwq->handler & EXP_BRCT_CHG) { + phy->phy_event &= ~EXP_BRCT_CHG; + sas_notify_port_event_gfp(sas_phy, + PORTE_BROADCAST_RCVD, GFP_ATOMIC); + mv_dprintk("phy%d Got Broadcast Change\n", phy_no); + } + list_del(&mwq->entry); + spin_unlock_irqrestore(&mvi->lock, flags); + kfree(mwq); +} + +static int mvs_handle_event(struct mvs_info *mvi, void *data, int handler) +{ + struct mvs_wq *mwq; + int ret = 0; + + mwq = kmalloc(sizeof(struct mvs_wq), GFP_ATOMIC); + if (mwq) { + mwq->mvi = mvi; + mwq->data = data; + mwq->handler = handler; + MV_INIT_DELAYED_WORK(&mwq->work_q, mvs_work_queue, mwq); + list_add_tail(&mwq->entry, &mvi->wq_list); + schedule_delayed_work(&mwq->work_q, HZ * 2); + } else + ret = -ENOMEM; + + return ret; +} + +static void mvs_sig_time_out(struct timer_list *t) +{ + struct mvs_phy *phy = from_timer(phy, t, timer); + struct mvs_info *mvi = phy->mvi; + u8 phy_no; + + for (phy_no = 0; phy_no < mvi->chip->n_phy; phy_no++) { + if (&mvi->phy[phy_no] == phy) { + mv_dprintk("Get signature time out, reset phy %d\n", + phy_no+mvi->id*mvi->chip->n_phy); + MVS_CHIP_DISP->phy_reset(mvi, phy_no, MVS_HARD_RESET); + } + } +} + +void mvs_int_port(struct mvs_info *mvi, int phy_no, u32 events) +{ + u32 tmp; + struct mvs_phy *phy = &mvi->phy[phy_no]; + + phy->irq_status = MVS_CHIP_DISP->read_port_irq_stat(mvi, phy_no); + MVS_CHIP_DISP->write_port_irq_stat(mvi, phy_no, phy->irq_status); + mv_dprintk("phy %d ctrl sts=0x%08X.\n", phy_no+mvi->id*mvi->chip->n_phy, + MVS_CHIP_DISP->read_phy_ctl(mvi, phy_no)); + mv_dprintk("phy %d irq sts = 0x%08X\n", phy_no+mvi->id*mvi->chip->n_phy, + phy->irq_status); + + /* + * events is port event now , + * we need check the interrupt status which belongs to per port. + */ + + if (phy->irq_status & PHYEV_DCDR_ERR) { + mv_dprintk("phy %d STP decoding error.\n", + phy_no + mvi->id*mvi->chip->n_phy); + } + + if (phy->irq_status & PHYEV_POOF) { + mdelay(500); + if (!(phy->phy_event & PHY_PLUG_OUT)) { + int dev_sata = phy->phy_type & PORT_TYPE_SATA; + int ready; + mvs_do_release_task(mvi, phy_no, NULL); + phy->phy_event |= PHY_PLUG_OUT; + MVS_CHIP_DISP->clear_srs_irq(mvi, 0, 1); + mvs_handle_event(mvi, + (void *)(unsigned long)phy_no, + PHY_PLUG_EVENT); + ready = mvs_is_phy_ready(mvi, phy_no); + if (ready || dev_sata) { + if (MVS_CHIP_DISP->stp_reset) + MVS_CHIP_DISP->stp_reset(mvi, + phy_no); + else + MVS_CHIP_DISP->phy_reset(mvi, + phy_no, MVS_SOFT_RESET); + return; + } + } + } + + if (phy->irq_status & PHYEV_COMWAKE) { + tmp = MVS_CHIP_DISP->read_port_irq_mask(mvi, phy_no); + MVS_CHIP_DISP->write_port_irq_mask(mvi, phy_no, + tmp | PHYEV_SIG_FIS); + if (phy->timer.function == NULL) { + phy->timer.function = mvs_sig_time_out; + phy->timer.expires = jiffies + 5*HZ; + add_timer(&phy->timer); + } + } + if (phy->irq_status & (PHYEV_SIG_FIS | PHYEV_ID_DONE)) { + phy->phy_status = mvs_is_phy_ready(mvi, phy_no); + mv_dprintk("notify plug in on phy[%d]\n", phy_no); + if (phy->phy_status) { + mdelay(10); + MVS_CHIP_DISP->detect_porttype(mvi, phy_no); + if (phy->phy_type & PORT_TYPE_SATA) { + tmp = MVS_CHIP_DISP->read_port_irq_mask( + mvi, phy_no); + tmp &= ~PHYEV_SIG_FIS; + MVS_CHIP_DISP->write_port_irq_mask(mvi, + phy_no, tmp); + } + mvs_update_phyinfo(mvi, phy_no, 0); + if (phy->phy_type & PORT_TYPE_SAS) { + MVS_CHIP_DISP->phy_reset(mvi, phy_no, MVS_PHY_TUNE); + mdelay(10); + } + + mvs_bytes_dmaed(mvi, phy_no, GFP_ATOMIC); + /* whether driver is going to handle hot plug */ + if (phy->phy_event & PHY_PLUG_OUT) { + mvs_port_notify_formed(&phy->sas_phy, 0); + phy->phy_event &= ~PHY_PLUG_OUT; + } + } else { + mv_dprintk("plugin interrupt but phy%d is gone\n", + phy_no + mvi->id*mvi->chip->n_phy); + } + } else if (phy->irq_status & PHYEV_BROAD_CH) { + mv_dprintk("phy %d broadcast change.\n", + phy_no + mvi->id*mvi->chip->n_phy); + mvs_handle_event(mvi, (void *)(unsigned long)phy_no, + EXP_BRCT_CHG); + } +} + +int mvs_int_rx(struct mvs_info *mvi, bool self_clear) +{ + u32 rx_prod_idx, rx_desc; + bool attn = false; + + /* the first dword in the RX ring is special: it contains + * a mirror of the hardware's RX producer index, so that + * we don't have to stall the CPU reading that register. + * The actual RX ring is offset by one dword, due to this. + */ + rx_prod_idx = mvi->rx_cons; + mvi->rx_cons = le32_to_cpu(mvi->rx[0]); + if (mvi->rx_cons == 0xfff) /* h/w hasn't touched RX ring yet */ + return 0; + + /* The CMPL_Q may come late, read from register and try again + * note: if coalescing is enabled, + * it will need to read from register every time for sure + */ + if (unlikely(mvi->rx_cons == rx_prod_idx)) + mvi->rx_cons = MVS_CHIP_DISP->rx_update(mvi) & RX_RING_SZ_MASK; + + if (mvi->rx_cons == rx_prod_idx) + return 0; + + while (mvi->rx_cons != rx_prod_idx) { + /* increment our internal RX consumer pointer */ + rx_prod_idx = (rx_prod_idx + 1) & (MVS_RX_RING_SZ - 1); + rx_desc = le32_to_cpu(mvi->rx[rx_prod_idx + 1]); + + if (likely(rx_desc & RXQ_DONE)) + mvs_slot_complete(mvi, rx_desc, 0); + if (rx_desc & RXQ_ATTN) { + attn = true; + } else if (rx_desc & RXQ_ERR) { + if (!(rx_desc & RXQ_DONE)) + mvs_slot_complete(mvi, rx_desc, 0); + } else if (rx_desc & RXQ_SLOT_RESET) { + mvs_slot_free(mvi, rx_desc); + } + } + + if (attn && self_clear) + MVS_CHIP_DISP->int_full(mvi); + return 0; +} + +int mvs_gpio_write(struct sas_ha_struct *sha, u8 reg_type, u8 reg_index, + u8 reg_count, u8 *write_data) +{ + struct mvs_prv_info *mvs_prv = sha->lldd_ha; + struct mvs_info *mvi = mvs_prv->mvi[0]; + + if (MVS_CHIP_DISP->gpio_write) { + return MVS_CHIP_DISP->gpio_write(mvs_prv, reg_type, + reg_index, reg_count, write_data); + } + + return -ENOSYS; +} |