From: Duane Grigsby <duane.grigsby@cavium.com>
Date: Wed, 21 Jun 2017 13:48:42 -0700
Subject: scsi: qla2xxx: Add FC-NVMe command handling
Patch-mainline: v4.13-rc1
Git-commit: 7401bc18d1ee39e46b668341097e0183975c02eb
References: FATE#322910
This patch adds logic to handle the completion of FC-NVMe commands and
creates a sub-command in the SRB command structure to manage NVMe
commands.
Signed-off-by: Darren Trapp <darren.trapp@cavium.com>
Signed-off-by: Duane Grigsby <duane.grigsby@cavium.com>
Signed-off-by: Anil Gurumurthy <anil.gurumurhty@cavium.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
---
drivers/scsi/qla2xxx/qla_def.h | 17 ++++++++
drivers/scsi/qla2xxx/qla_fw.h | 22 +++++++++--
drivers/scsi/qla2xxx/qla_isr.c | 80 +++++++++++++++++++++++++++++++++++++++++
drivers/scsi/qla2xxx/qla_os.c | 18 ++++++++-
4 files changed, 132 insertions(+), 5 deletions(-)
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -412,6 +412,20 @@ struct srb_iocb {
struct {
struct imm_ntfy_from_isp *ntfy;
} nack;
+ struct {
+ __le16 comp_status;
+ uint16_t rsp_pyld_len;
+ uint8_t aen_op;
+ void *desc;
+
+ /* These are only used with ls4 requests */
+ int cmd_len;
+ int rsp_len;
+ dma_addr_t cmd_dma;
+ dma_addr_t rsp_dma;
+ uint32_t dl;
+ uint32_t timeout_sec;
+ } nvme;
} u;
struct timer_list timer;
@@ -437,6 +451,7 @@ struct srb_iocb {
#define SRB_NACK_PLOGI 16
#define SRB_NACK_PRLI 17
#define SRB_NACK_LOGO 18
+#define SRB_NVME_CMD 19
#define SRB_PRLI_CMD 21
enum {
@@ -4110,6 +4125,8 @@ typedef struct scsi_qla_host {
struct nvme_fc_local_port *nvme_local_port;
atomic_t nvme_ref_count;
struct list_head nvme_rport_list;
+ atomic_t nvme_active_aen_cnt;
+ uint16_t nvme_last_rptd_aen;
uint16_t fcoe_vlan_id;
uint16_t fcoe_fcf_idx;
--- a/drivers/scsi/qla2xxx/qla_fw.h
+++ b/drivers/scsi/qla2xxx/qla_fw.h
@@ -7,6 +7,9 @@
#ifndef __QLA_FW_H
#define __QLA_FW_H
+#include <linux/nvme.h>
+#include <linux/nvme-fc.h>
+
#define MBS_CHECKSUM_ERROR 0x4010
#define MBS_INVALID_PRODUCT_KEY 0x4020
@@ -603,9 +606,14 @@ struct sts_entry_24xx {
uint32_t residual_len; /* FW calc residual transfer length. */
- uint16_t reserved_1;
+ union {
+ uint16_t reserved_1;
+ uint16_t nvme_rsp_pyld_len;
+ };
+
uint16_t state_flags; /* State flags. */
#define SF_TRANSFERRED_DATA BIT_11
+#define SF_NVME_ERSP BIT_6
#define SF_FCP_RSP_DMA BIT_0
uint16_t retry_delay;
@@ -615,8 +623,16 @@ struct sts_entry_24xx {
uint32_t rsp_residual_count; /* FCP RSP residual count. */
uint32_t sense_len; /* FCP SENSE length. */
- uint32_t rsp_data_len; /* FCP response data length. */
- uint8_t data[28]; /* FCP response/sense information. */
+
+ union {
+ struct {
+ uint32_t rsp_data_len; /* FCP response data length */
+ uint8_t data[28]; /* FCP rsp/sense information */
+ };
+ struct nvme_fc_ersp_iu nvme_ersp;
+ uint8_t nvme_ersp_data[32];
+ };
+
/*
* If DIF Error is set in comp_status, these additional fields are
* defined:
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -1799,6 +1799,79 @@ qla24xx_tm_iocb_entry(scsi_qla_host_t *v
sp->done(sp, 0);
}
+static void
+qla24xx_nvme_iocb_entry(scsi_qla_host_t *vha, struct req_que *req, void *tsk)
+{
+ const char func[] = "NVME-IOCB";
+ fc_port_t *fcport;
+ srb_t *sp;
+ struct srb_iocb *iocb;
+ struct sts_entry_24xx *sts = (struct sts_entry_24xx *)tsk;
+ uint16_t state_flags;
+ struct nvmefc_fcp_req *fd;
+ uint16_t ret = 0;
+ struct srb_iocb *nvme;
+
+ sp = qla2x00_get_sp_from_handle(vha, func, req, tsk);
+ if (!sp)
+ return;
+
+ iocb = &sp->u.iocb_cmd;
+ fcport = sp->fcport;
+ iocb->u.nvme.comp_status = le16_to_cpu(sts->comp_status);
+ state_flags = le16_to_cpu(sts->state_flags);
+ fd = iocb->u.nvme.desc;
+ nvme = &sp->u.iocb_cmd;
+
+ if (unlikely(nvme->u.nvme.aen_op))
+ atomic_dec(&sp->vha->nvme_active_aen_cnt);
+
+ /*
+ * State flags: Bit 6 and 0.
+ * If 0 is set, we don't care about 6.
+ * both cases resp was dma'd to host buffer
+ * if both are 0, that is good path case.
+ * if six is set and 0 is clear, we need to
+ * copy resp data from status iocb to resp buffer.
+ */
+ if (!(state_flags & (SF_FCP_RSP_DMA | SF_NVME_ERSP))) {
+ iocb->u.nvme.rsp_pyld_len = 0;
+ } else if ((state_flags & SF_FCP_RSP_DMA)) {
+ iocb->u.nvme.rsp_pyld_len = le16_to_cpu(sts->nvme_rsp_pyld_len);
+ } else if (state_flags & SF_NVME_ERSP) {
+ uint32_t *inbuf, *outbuf;
+ uint16_t iter;
+
+ inbuf = (uint32_t *)&sts->nvme_ersp_data;
+ outbuf = (uint32_t *)fd->rspaddr;
+ iocb->u.nvme.rsp_pyld_len = le16_to_cpu(sts->nvme_rsp_pyld_len);
+ iter = iocb->u.nvme.rsp_pyld_len >> 2;
+ for (; iter; iter--)
+ *outbuf++ = swab32(*inbuf++);
+ } else { /* unhandled case */
+ ql_log(ql_log_warn, fcport->vha, 0x503a,
+ "NVME-%s error. Unhandled state_flags of %x\n",
+ sp->name, state_flags);
+ }
+
+ fd->transferred_length = fd->payload_length -
+ le32_to_cpu(sts->residual_len);
+
+ if (sts->entry_status) {
+ ql_log(ql_log_warn, fcport->vha, 0x5038,
+ "NVME-%s error - hdl=%x entry-status(%x).\n",
+ sp->name, sp->handle, sts->entry_status);
+ ret = QLA_FUNCTION_FAILED;
+ } else if (sts->comp_status != cpu_to_le16(CS_COMPLETE)) {
+ ql_log(ql_log_warn, fcport->vha, 0x5039,
+ "NVME-%s error - hdl=%x completion status(%x) resid=%x ox_id=%x\n",
+ sp->name, sp->handle, sts->comp_status,
+ le32_to_cpu(sts->residual_len), sts->ox_id);
+ ret = QLA_FUNCTION_FAILED;
+ }
+ sp->done(sp, ret);
+}
+
/**
* qla2x00_process_response_queue() - Process response queue entries.
* @ha: SCSI driver HA context
@@ -2289,6 +2362,12 @@ qla2x00_status_entry(scsi_qla_host_t *vh
return;
}
+ /* NVME completion. */
+ if (sp->type == SRB_NVME_CMD) {
+ qla24xx_nvme_iocb_entry(vha, req, pkt);
+ return;
+ }
+
if (unlikely((state_flags & BIT_1) && (sp->type == SRB_BIDI_CMD))) {
qla25xx_process_bidir_status_iocb(vha, pkt, req, handle);
return;
@@ -3499,3 +3578,4 @@ int qla25xx_request_irq(struct qla_hw_da
msix->handle = qpair;
return ret;
}
+
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -695,8 +695,10 @@ qla2x00_sp_free_dma(void *ptr)
}
end:
- CMD_SP(cmd) = NULL;
- qla2x00_rel_sp(sp);
+ if (sp->type != SRB_NVME_CMD) {
+ CMD_SP(cmd) = NULL;
+ qla2x00_rel_sp(sp);
+ }
}
void
@@ -5993,6 +5995,18 @@ qla2x00_timer(scsi_qla_host_t *vha)
if (!list_empty(&vha->work_list))
start_dpc++;
+ /*
+ * FC-NVME
+ * see if the active AEN count has changed from what was last reported.
+ */
+ if (atomic_read(&vha->nvme_active_aen_cnt) != vha->nvme_last_rptd_aen) {
+ vha->nvme_last_rptd_aen =
+ atomic_read(&vha->nvme_active_aen_cnt);
+ ql_log(ql_log_info, vha, 0x3002,
+ "reporting new aen count of %d to the fw\n",
+ vha->nvme_last_rptd_aen);
+ }
+
/* Schedule the DPC routine if needed */
if ((test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags) ||
test_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags) ||