From 7c6300e3941da8e84bf5faf1358bf3909c5ef97e Mon Sep 17 00:00:00 2001 From: Joe Carnuccio Date: Fri, 11 Apr 2014 16:54:37 -0400 Subject: [PATCH] qla2xxx: ISP27xx queue index shadow registers. For ISP27xx use the request/response queue index shadow registers to avoid directly access them on the PCI bus. Signed-off-by: Joe Carnuccio Signed-off-by: Saurav Kashyap Signed-off-by: Christoph Hellwig --- drivers/scsi/qla2xxx/qla_def.h | 3 +++ drivers/scsi/qla2xxx/qla_fw.h | 5 ++++- drivers/scsi/qla2xxx/qla_init.c | 8 ++++++++ drivers/scsi/qla2xxx/qla_iocb.c | 12 ++++++------ drivers/scsi/qla2xxx/qla_mbx.c | 10 ++++++++-- drivers/scsi/qla2xxx/qla_tmpl.c | 6 ++++-- 6 files changed, 33 insertions(+), 11 deletions(-) diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h index 6c9724c1c5a4..5c590d40e676 100644 --- a/drivers/scsi/qla2xxx/qla_def.h +++ b/drivers/scsi/qla2xxx/qla_def.h @@ -2685,6 +2685,7 @@ struct rsp_que { uint32_t __iomem *rsp_q_out; uint16_t ring_index; uint16_t out_ptr; + uint16_t *in_ptr; /* queue shadow in index */ uint16_t length; uint16_t options; uint16_t rid; @@ -2711,6 +2712,7 @@ struct req_que { uint32_t __iomem *req_q_out; uint16_t ring_index; uint16_t in_ptr; + uint16_t *out_ptr; /* queue shadow out index */ uint16_t cnt; uint16_t length; uint16_t options; @@ -3019,6 +3021,7 @@ struct qla_hw_data { (((ha)->fw_attributes_h << 16 | (ha)->fw_attributes) & BIT_22)) #define IS_ATIO_MSIX_CAPABLE(ha) (IS_QLA83XX(ha)) #define IS_TGT_MODE_CAPABLE(ha) (ha->tgt.atio_q_length) +#define IS_SHADOW_REG_CAPABLE(ha) (IS_QLA27XX(ha)) /* HBA serial number */ uint8_t serial0; diff --git a/drivers/scsi/qla2xxx/qla_fw.h b/drivers/scsi/qla2xxx/qla_fw.h index a9f86e713f75..2cdedd9e9f4d 100644 --- a/drivers/scsi/qla2xxx/qla_fw.h +++ b/drivers/scsi/qla2xxx/qla_fw.h @@ -371,7 +371,10 @@ struct init_cb_24xx { * BIT 14 = Data Rate bit 1 * BIT 15 = Data Rate bit 2 * BIT 16 = Enable 75 ohm Termination Select - * BIT 17-31 = Reserved + * BIT 17-28 = Reserved + * BIT 29 = Enable response queue 0 in index shadowing + * BIT 30 = Enable request queue 0 out index shadowing + * BIT 31 = Reserved */ uint32_t firmware_options_3; uint16_t qos; diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c index 2d97d7c146e4..20b569e93340 100644 --- a/drivers/scsi/qla2xxx/qla_init.c +++ b/drivers/scsi/qla2xxx/qla_init.c @@ -2062,6 +2062,10 @@ qla24xx_config_rings(struct scsi_qla_host *vha) icb->atio_q_address[0] = cpu_to_le32(LSD(ha->tgt.atio_dma)); icb->atio_q_address[1] = cpu_to_le32(MSD(ha->tgt.atio_dma)); + if (IS_SHADOW_REG_CAPABLE(ha)) + icb->firmware_options_2 |= + __constant_cpu_to_le32(BIT_30|BIT_29); + if (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha)) { icb->qos = __constant_cpu_to_le16(QLA_DEFAULT_QUE_QOS); icb->rid = __constant_cpu_to_le16(rid); @@ -2139,6 +2143,8 @@ qla2x00_init_rings(scsi_qla_host_t *vha) req = ha->req_q_map[que]; if (!req) continue; + req->out_ptr = (void *)(req->ring + req->length); + *req->out_ptr = 0; for (cnt = 1; cnt < req->num_outstanding_cmds; cnt++) req->outstanding_cmds[cnt] = NULL; @@ -2154,6 +2160,8 @@ qla2x00_init_rings(scsi_qla_host_t *vha) rsp = ha->rsp_q_map[que]; if (!rsp) continue; + rsp->in_ptr = (void *)(rsp->ring + rsp->length); + *rsp->in_ptr = 0; /* Initialize response queue entries */ if (IS_QLAFX00(ha)) qlafx00_init_response_q_entries(rsp); diff --git a/drivers/scsi/qla2xxx/qla_iocb.c b/drivers/scsi/qla2xxx/qla_iocb.c index 8707a64a0770..af83132141f7 100644 --- a/drivers/scsi/qla2xxx/qla_iocb.c +++ b/drivers/scsi/qla2xxx/qla_iocb.c @@ -1478,8 +1478,8 @@ qla24xx_start_scsi(srb_t *sp) tot_dsds = nseg; req_cnt = qla24xx_calc_iocbs(vha, tot_dsds); if (req->cnt < (req_cnt + 2)) { - cnt = RD_REG_DWORD_RELAXED(req->req_q_out); - + cnt = IS_SHADOW_REG_CAPABLE(ha) ? *req->out_ptr : + RD_REG_DWORD_RELAXED(req->req_q_out); if (req->ring_index < cnt) req->cnt = cnt - req->ring_index; else @@ -1697,8 +1697,8 @@ qla24xx_dif_start_scsi(srb_t *sp) tot_prot_dsds = nseg; tot_dsds += nseg; if (req->cnt < (req_cnt + 2)) { - cnt = RD_REG_DWORD_RELAXED(req->req_q_out); - + cnt = IS_SHADOW_REG_CAPABLE(ha) ? *req->out_ptr : + RD_REG_DWORD_RELAXED(req->req_q_out); if (req->ring_index < cnt) req->cnt = cnt - req->ring_index; else @@ -2825,8 +2825,8 @@ qla2x00_start_bidir(srb_t *sp, struct scsi_qla_host *vha, uint32_t tot_dsds) /* Check for room on request queue. */ if (req->cnt < req_cnt + 2) { - cnt = RD_REG_DWORD_RELAXED(req->req_q_out); - + cnt = IS_SHADOW_REG_CAPABLE(ha) ? *req->out_ptr : + RD_REG_DWORD_RELAXED(req->req_q_out); if (req->ring_index < cnt) req->cnt = cnt - req->ring_index; else diff --git a/drivers/scsi/qla2xxx/qla_mbx.c b/drivers/scsi/qla2xxx/qla_mbx.c index 01d9f54a3222..7f39e3605027 100644 --- a/drivers/scsi/qla2xxx/qla_mbx.c +++ b/drivers/scsi/qla2xxx/qla_mbx.c @@ -3735,6 +3735,9 @@ qla25xx_init_req_que(struct scsi_qla_host *vha, struct req_que *req) ql_dbg(ql_dbg_mbx + ql_dbg_verbose, vha, 0x10d3, "Entered %s.\n", __func__); + if (IS_SHADOW_REG_CAPABLE(ha)) + req->options |= BIT_13; + mcp->mb[0] = MBC_INITIALIZE_MULTIQ; mcp->mb[1] = req->options; mcp->mb[2] = MSW(LSD(req->dma)); @@ -3754,7 +3757,7 @@ qla25xx_init_req_que(struct scsi_qla_host *vha, struct req_que *req) /* que in ptr index */ mcp->mb[8] = 0; /* que out ptr index */ - mcp->mb[9] = 0; + mcp->mb[9] = *req->out_ptr = 0; mcp->out_mb = MBX_14|MBX_13|MBX_12|MBX_11|MBX_10|MBX_9|MBX_8|MBX_7| MBX_6|MBX_5|MBX_4|MBX_3|MBX_2|MBX_1|MBX_0; mcp->in_mb = MBX_0; @@ -3801,6 +3804,9 @@ qla25xx_init_rsp_que(struct scsi_qla_host *vha, struct rsp_que *rsp) ql_dbg(ql_dbg_mbx + ql_dbg_verbose, vha, 0x10d6, "Entered %s.\n", __func__); + if (IS_SHADOW_REG_CAPABLE(ha)) + rsp->options |= BIT_13; + mcp->mb[0] = MBC_INITIALIZE_MULTIQ; mcp->mb[1] = rsp->options; mcp->mb[2] = MSW(LSD(rsp->dma)); @@ -3815,7 +3821,7 @@ qla25xx_init_rsp_que(struct scsi_qla_host *vha, struct rsp_que *rsp) mcp->mb[4] = rsp->id; /* que in ptr index */ - mcp->mb[8] = 0; + mcp->mb[8] = *rsp->in_ptr = 0; /* que out ptr index */ mcp->mb[9] = 0; mcp->out_mb = MBX_14|MBX_13|MBX_9|MBX_8|MBX_7 diff --git a/drivers/scsi/qla2xxx/qla_tmpl.c b/drivers/scsi/qla2xxx/qla_tmpl.c index a9fa9b72b31a..cb9a0c4bc419 100644 --- a/drivers/scsi/qla2xxx/qla_tmpl.c +++ b/drivers/scsi/qla2xxx/qla_tmpl.c @@ -679,7 +679,8 @@ qla27xx_fwdt_entry_t274(struct scsi_qla_host *vha, if (req || !buf) { qla27xx_insert16(i, buf, len); qla27xx_insert16(1, buf, len); - qla27xx_insert32(0, buf, len); + qla27xx_insert32(req && req->out_ptr ? + *req->out_ptr : 0, buf, len); count++; } } @@ -689,7 +690,8 @@ qla27xx_fwdt_entry_t274(struct scsi_qla_host *vha, if (rsp || !buf) { qla27xx_insert16(i, buf, len); qla27xx_insert16(1, buf, len); - qla27xx_insert32(0, buf, len); + qla27xx_insert32(rsp && rsp->in_ptr ? + *rsp->in_ptr : 0, buf, len); count++; } }