[SCSI] qla2xxx: Add asynchronous-login support.

ISPs which support this feature include 23xx and above.

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 202 insertions, 0 deletions

diff --git a/drivers/scsi/qla2xxx/qla_iocb.c b/drivers/scsi/qla2xxx/qla_iocb.c
index d37554ecd313..c5ccac0bef76 100644
--- a/drivers/scsi/qla2xxx/qla_iocb.c
+++ b/drivers/scsi/qla2xxx/qla_iocb.c
@@ -860,3 +860,205 @@ static void qla25xx_set_que(srb_t *sp, struct rsp_que **rsp)
          else
                 *rsp = ha->rsp_q_map[0];
 }
+
+/* Generic Control-SRB manipulation functions. */
+
+static void *
+qla2x00_alloc_iocbs(srb_t *sp)
+{
+        scsi_qla_host_t *vha = sp->fcport->vha;
+        struct qla_hw_data *ha = vha->hw;
+        struct req_que *req = ha->req_q_map[0];
+        device_reg_t __iomem *reg = ISP_QUE_REG(ha, req->id);
+        uint32_t index, handle;
+        request_t *pkt;
+        uint16_t cnt, req_cnt;
+
+        pkt = NULL;
+        req_cnt = 1;
+
+        /* Check for room in outstanding command list. */
+        handle = req->current_outstanding_cmd;
+        for (index = 1; index < MAX_OUTSTANDING_COMMANDS; index++) {
+                handle++;
+                if (handle == MAX_OUTSTANDING_COMMANDS)
+                        handle = 1;
+                if (!req->outstanding_cmds[handle])
+                        break;
+        }
+        if (index == MAX_OUTSTANDING_COMMANDS)
+                goto queuing_error;
+
+        /* Check for room on request queue. */
+        if (req->cnt < req_cnt) {
+                if (ha->mqenable)
+                        cnt = RD_REG_DWORD(&reg->isp25mq.req_q_out);
+                else if (IS_FWI2_CAPABLE(ha))
+                        cnt = RD_REG_DWORD(&reg->isp24.req_q_out);
+                else
+                        cnt = qla2x00_debounce_register(
+                            ISP_REQ_Q_OUT(ha, &reg->isp));
+
+                if  (req->ring_index < cnt)
+                        req->cnt = cnt - req->ring_index;
+                else
+                        req->cnt = req->length -
+                            (req->ring_index - cnt);
+        }
+        if (req->cnt < req_cnt)
+                goto queuing_error;
+
+        /* Prep packet */
+        req->current_outstanding_cmd = handle;
+        req->outstanding_cmds[handle] = sp;
+        req->cnt -= req_cnt;
+
+        pkt = req->ring_ptr;
+        memset(pkt, 0, REQUEST_ENTRY_SIZE);
+        pkt->entry_count = req_cnt;
+        pkt->handle = handle;
+        sp->handle = handle;
+
+queuing_error:
+        return pkt;
+}
+
+static void
+qla2x00_start_iocbs(srb_t *sp)
+{
+        struct qla_hw_data *ha = sp->fcport->vha->hw;
+        struct req_que *req = ha->req_q_map[0];
+        device_reg_t __iomem *reg = ISP_QUE_REG(ha, req->id);
+        struct device_reg_2xxx __iomem *ioreg = &ha->iobase->isp;
+
+        /* Adjust ring index. */
+        req->ring_index++;
+        if (req->ring_index == req->length) {
+                req->ring_index = 0;
+                req->ring_ptr = req->ring;
+        } else
+                req->ring_ptr++;
+
+        /* Set chip new ring index. */
+        if (ha->mqenable) {
+                WRT_REG_DWORD(&reg->isp25mq.req_q_in, req->ring_index);
+                RD_REG_DWORD(&ioreg->hccr);
+        } else if (IS_FWI2_CAPABLE(ha)) {
+                WRT_REG_DWORD(&reg->isp24.req_q_in, req->ring_index);
+                RD_REG_DWORD_RELAXED(&reg->isp24.req_q_in);
+        } else {
+                WRT_REG_WORD(ISP_REQ_Q_IN(ha, &reg->isp), req->ring_index);
+                RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, &reg->isp));
+        }
+}
+
+static void
+qla24xx_login_iocb(srb_t *sp, struct logio_entry_24xx *logio)
+{
+        struct srb_logio *lio = sp->ctx;
+
+        logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
+        logio->control_flags = cpu_to_le16(LCF_COMMAND_PLOGI);
+        if (lio->flags & SRB_LOGIN_COND_PLOGI)
+                logio->control_flags |= cpu_to_le16(LCF_COND_PLOGI);
+        if (lio->flags & SRB_LOGIN_SKIP_PRLI)
+                logio->control_flags |= cpu_to_le16(LCF_SKIP_PRLI);
+        logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
+        logio->port_id[0] = sp->fcport->d_id.b.al_pa;
+        logio->port_id[1] = sp->fcport->d_id.b.area;
+        logio->port_id[2] = sp->fcport->d_id.b.domain;
+        logio->vp_index = sp->fcport->vp_idx;
+}
+
+static void
+qla2x00_login_iocb(srb_t *sp, struct mbx_entry *mbx)
+{
+        struct qla_hw_data *ha = sp->fcport->vha->hw;
+        struct srb_logio *lio = sp->ctx;
+        uint16_t opts;
+
+        mbx->entry_type = MBX_IOCB_TYPE;;
+        SET_TARGET_ID(ha, mbx->loop_id, sp->fcport->loop_id);
+        mbx->mb0 = cpu_to_le16(MBC_LOGIN_FABRIC_PORT);
+        opts = lio->flags & SRB_LOGIN_COND_PLOGI ? BIT_0: 0;
+        opts |= lio->flags & SRB_LOGIN_SKIP_PRLI ? BIT_1: 0;
+        if (HAS_EXTENDED_IDS(ha)) {
+                mbx->mb1 = cpu_to_le16(sp->fcport->loop_id);
+                mbx->mb10 = cpu_to_le16(opts);
+        } else {
+                mbx->mb1 = cpu_to_le16((sp->fcport->loop_id << 8) | opts);
+        }
+        mbx->mb2 = cpu_to_le16(sp->fcport->d_id.b.domain);
+        mbx->mb3 = cpu_to_le16(sp->fcport->d_id.b.area << 8 |
+            sp->fcport->d_id.b.al_pa);
+        mbx->mb9 = cpu_to_le16(sp->fcport->vp_idx);
+}
+
+static void
+qla24xx_logout_iocb(srb_t *sp, struct logio_entry_24xx *logio)
+{
+        logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
+        logio->control_flags =
+            cpu_to_le16(LCF_COMMAND_LOGO|LCF_IMPL_LOGO);
+        logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
+        logio->port_id[0] = sp->fcport->d_id.b.al_pa;
+        logio->port_id[1] = sp->fcport->d_id.b.area;
+        logio->port_id[2] = sp->fcport->d_id.b.domain;
+        logio->vp_index = sp->fcport->vp_idx;
+}
+
+static void
+qla2x00_logout_iocb(srb_t *sp, struct mbx_entry *mbx)
+{
+        struct qla_hw_data *ha = sp->fcport->vha->hw;
+
+        mbx->entry_type = MBX_IOCB_TYPE;;
+        SET_TARGET_ID(ha, mbx->loop_id, sp->fcport->loop_id);
+        mbx->mb0 = cpu_to_le16(MBC_LOGOUT_FABRIC_PORT);
+        mbx->mb1 = HAS_EXTENDED_IDS(ha) ?
+            cpu_to_le16(sp->fcport->loop_id):
+            cpu_to_le16(sp->fcport->loop_id << 8);
+        mbx->mb2 = cpu_to_le16(sp->fcport->d_id.b.domain);
+        mbx->mb3 = cpu_to_le16(sp->fcport->d_id.b.area << 8 |
+            sp->fcport->d_id.b.al_pa);
+        mbx->mb9 = cpu_to_le16(sp->fcport->vp_idx);
+        /* Implicit: mbx->mbx10 = 0. */
+}
+
+int
+qla2x00_start_sp(srb_t *sp)
+{
+        int rval;
+        struct qla_hw_data *ha = sp->fcport->vha->hw;
+        void *pkt;
+        struct srb_ctx *ctx = sp->ctx;
+        unsigned long flags;
+
+        rval = QLA_FUNCTION_FAILED;
+        spin_lock_irqsave(&ha->hardware_lock, flags);
+        pkt = qla2x00_alloc_iocbs(sp);
+        if (!pkt)
+                goto done;
+
+        rval = QLA_SUCCESS;
+        switch (ctx->type) {
+        case SRB_LOGIN_CMD:
+                IS_FWI2_CAPABLE(ha) ?
+                    qla24xx_login_iocb(sp, pkt):
+                    qla2x00_login_iocb(sp, pkt);
+                break;
+        case SRB_LOGOUT_CMD:
+                IS_FWI2_CAPABLE(ha) ?
+                    qla24xx_logout_iocb(sp, pkt):
+                    qla2x00_logout_iocb(sp, pkt);
+                break;
+        default:
+                break;
+        }
+
+        wmb();
+        qla2x00_start_iocbs(sp);
+done:
+        spin_unlock_irqrestore(&ha->hardware_lock, flags);
+        return rval;
+}