scsi: qla2xxx: Add FC-NVMe F/W initialization and transport registration

This code provides the interfaces to register remote and local ports of
FC4 type 0x28 with the FC-NVMe transport and transports the requests
(FC-NVMe FC link services and FC-NVMe commands IUs) to the fabric. It
also provides the support for allocating h/w queues and aborting FC-NVMe
FC requests.
Signed-off-by: NDarren Trapp <darren.trapp@cavium.com>
Signed-off-by: NDuane Grigsby <duane.grigsby@cavium.com>
Signed-off-by: NAnil Gurumurthy <anil.gurumurhty@cavium.com>
Signed-off-by: NGiridhar Malavali <giridhar.malavali@cavium.com>
Signed-off-by: NHimanshu Madhani <himanshu.madhani@cavium.com>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qla2xxx/Makefile

 qla2xxx-y := qla_os.o qla_init.o qla_mbx.o qla_iocb.o qla_isr.o qla_gs.o \
 		qla_dbg.o qla_sup.o qla_attr.o qla_mid.o qla_dfs.o qla_bsg.o \
-		qla_nx.o qla_mr.o qla_nx2.o qla_target.o qla_tmpl.o
+		qla_nx.o qla_mr.o qla_nx2.o qla_target.o qla_tmpl.o qla_nvme.o
 
 obj-$(CONFIG_SCSI_QLA_FC) += qla2xxx.o
 obj-$(CONFIG_TCM_QLA2XXX) += tcm_qla2xxx.o

drivers/scsi/qla2xxx/qla_dbg.c

@@ -15,7 +15,7 @@
  * |                              |                    | 0x015b-0x0160	|
  * |                              |                    | 0x016e		|
  * | Mailbox commands             |       0x1199       | 0x1193		|
- * | Device Discovery             |       0x2131       | 0x210e-0x2116  |
+ * | Device Discovery             |       0x2134       | 0x210e-0x2116  |
  * |				  | 		       | 0x211a         |
  * |                              |                    | 0x211c-0x2128  |
  * |                              |                    | 0x212a-0x2130  |

drivers/scsi/qla2xxx/qla_def.h

@@ -37,6 +37,7 @@
 #include "qla_bsg.h"
 #include "qla_nx.h"
 #include "qla_nx2.h"
+#include "qla_nvme.h"
 #define QLA2XXX_DRIVER_NAME	"qla2xxx"
 #define QLA2XXX_APIDEV		"ql2xapidev"
 #define QLA2XXX_MANUFACTURER	"QLogic Corporation"
@@ -423,6 +424,7 @@ struct srb_iocb {
 			int rsp_len;
 			dma_addr_t cmd_dma;
 			dma_addr_t rsp_dma;
+			enum nvmefc_fcp_datadir dir;
 			uint32_t dl;
 			uint32_t timeout_sec;
 		} nvme;
@@ -452,6 +454,7 @@ struct srb_iocb {
 #define SRB_NACK_PRLI	17
 #define SRB_NACK_LOGO	18
 #define SRB_NVME_CMD	19
+#define SRB_NVME_LS	20
 #define SRB_PRLI_CMD	21
 
 enum {
@@ -467,6 +470,7 @@ typedef struct srb {
 	uint8_t cmd_type;
 	uint8_t pad[3];
 	atomic_t ref_count;
+	wait_queue_head_t nvme_ls_waitQ;
 	struct fc_port *fcport;
 	struct scsi_qla_host *vha;
 	uint32_t handle;
@@ -2298,6 +2302,7 @@ typedef struct fc_port {
 
 	struct work_struct nvme_del_work;
 	atomic_t nvme_ref_count;
+	wait_queue_head_t nvme_waitQ;
 	uint32_t nvme_prli_service_param;
 #define NVME_PRLI_SP_CONF       BIT_7
 #define NVME_PRLI_SP_INITIATOR  BIT_5
@@ -4124,6 +4129,7 @@ typedef struct scsi_qla_host {
 
 	struct		nvme_fc_local_port *nvme_local_port;
 	atomic_t	nvme_ref_count;
+	wait_queue_head_t nvme_waitQ;
 	struct list_head nvme_rport_list;
 	atomic_t 	nvme_active_aen_cnt;
 	uint16_t	nvme_last_rptd_aen;

drivers/scsi/qla2xxx/qla_gbl.h

@@ -9,6 +9,16 @@
 
 #include <linux/interrupt.h>
 
+/*
+ * Global functions prototype in qla_nvme.c source file.
+ */
+extern void qla_nvme_register_hba(scsi_qla_host_t *);
+extern int  qla_nvme_register_remote(scsi_qla_host_t *, fc_port_t *);
+extern void qla_nvme_delete(scsi_qla_host_t *);
+extern void qla_nvme_abort(struct qla_hw_data *, srb_t *sp);
+extern void qla24xx_nvme_ls4_iocb(scsi_qla_host_t *, struct pt_ls4_request *,
+    struct req_que *);
+
 /*
  * Global Function Prototypes in qla_init.c source file.
  */
@@ -141,6 +151,7 @@ extern int ql2xiniexchg;
 extern int ql2xfwholdabts;
 extern int ql2xmvasynctoatio;
 extern int ql2xuctrlirq;
+extern int ql2xnvmeenable;
 
 extern int qla2x00_loop_reset(scsi_qla_host_t *);
 extern void qla2x00_abort_all_cmds(scsi_qla_host_t *, int);

drivers/scsi/qla2xxx/qla_init.c

@@ -4520,6 +4520,11 @@ qla2x00_update_fcport(scsi_qla_host_t *vha, fc_port_t *fcport)
 	fcport->deleted = 0;
 	fcport->logout_on_delete = 1;
 
+	if (fcport->fc4f_nvme) {
+		qla_nvme_register_remote(vha, fcport);
+		return;
+	}
+
 	qla2x00_set_fcport_state(fcport, FCS_ONLINE);
 	qla2x00_iidma_fcport(vha, fcport);
 	qla24xx_update_fcport_fcp_prio(vha, fcport);
@@ -4669,6 +4674,9 @@ qla2x00_configure_fabric(scsi_qla_host_t *vha)
 			break;
 	} while (0);
 
+	if (!vha->nvme_local_port && vha->flags.nvme_enabled)
+		qla_nvme_register_hba(vha);
+
 	if (rval)
 		ql_dbg(ql_dbg_disc, vha, 0x2068,
 		    "Configure fabric error exit rval=%d.\n", rval);

drivers/scsi/qla2xxx/qla_iocb.c

@@ -3155,6 +3155,39 @@ static void qla2x00_send_notify_ack_iocb(srb_t *sp,
 	nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
 }
 
+/*
+ * Build NVME LS request
+ */
+static int
+qla_nvme_ls(srb_t *sp, struct pt_ls4_request *cmd_pkt)
+{
+	struct srb_iocb *nvme;
+	int     rval = QLA_SUCCESS;
+
+	nvme = &sp->u.iocb_cmd;
+	cmd_pkt->entry_type = PT_LS4_REQUEST;
+	cmd_pkt->entry_count = 1;
+	cmd_pkt->control_flags = CF_LS4_ORIGINATOR << CF_LS4_SHIFT;
+
+	cmd_pkt->timeout = cpu_to_le16(nvme->u.nvme.timeout_sec);
+	cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
+	cmd_pkt->vp_index = sp->fcport->vha->vp_idx;
+
+	cmd_pkt->tx_dseg_count = 1;
+	cmd_pkt->tx_byte_count = nvme->u.nvme.cmd_len;
+	cmd_pkt->dseg0_len = nvme->u.nvme.cmd_len;
+	cmd_pkt->dseg0_address[0] = cpu_to_le32(LSD(nvme->u.nvme.cmd_dma));
+	cmd_pkt->dseg0_address[1] = cpu_to_le32(MSD(nvme->u.nvme.cmd_dma));
+
+	cmd_pkt->rx_dseg_count = 1;
+	cmd_pkt->rx_byte_count = nvme->u.nvme.rsp_len;
+	cmd_pkt->dseg1_len  = nvme->u.nvme.rsp_len;
+	cmd_pkt->dseg1_address[0] =  cpu_to_le32(LSD(nvme->u.nvme.rsp_dma));
+	cmd_pkt->dseg1_address[1] =  cpu_to_le32(MSD(nvme->u.nvme.rsp_dma));
+
+	return rval;
+}
+
 int
 qla2x00_start_sp(srb_t *sp)
 {
@@ -3211,6 +3244,9 @@ qla2x00_start_sp(srb_t *sp)
 	case SRB_FXIOCB_BCMD:
 		qlafx00_fxdisc_iocb(sp, pkt);
 		break;
+	case SRB_NVME_LS:
+		qla_nvme_ls(sp, pkt);
+		break;
 	case SRB_ABT_CMD:
 		IS_QLAFX00(ha) ?
 			qlafx00_abort_iocb(sp, pkt) :

drivers/scsi/qla2xxx/qla_isr.c

@@ -2828,6 +2828,21 @@ qla24xx_abort_iocb_entry(scsi_qla_host_t *vha, struct req_que *req,
 	sp->done(sp, 0);
 }
 
+void qla24xx_nvme_ls4_iocb(scsi_qla_host_t *vha, struct pt_ls4_request *pkt,
+    struct req_que *req)
+{
+	srb_t *sp;
+	const char func[] = "LS4_IOCB";
+	uint16_t comp_status;
+
+	sp = qla2x00_get_sp_from_handle(vha, func, req, pkt);
+	if (!sp)
+		return;
+
+	comp_status = le16_to_cpu(pkt->status);
+	sp->done(sp, comp_status);
+}
+
 /**
  * qla24xx_process_response_queue() - Process response queue entries.
  * @ha: SCSI driver HA context
@@ -2901,6 +2916,10 @@ void qla24xx_process_response_queue(struct scsi_qla_host *vha,
 		case CTIO_CRC2:
 			qlt_response_pkt_all_vps(vha, rsp, (response_t *)pkt);
 			break;
+		case PT_LS4_REQUEST:
+			qla24xx_nvme_ls4_iocb(vha, (struct pt_ls4_request *)pkt,
+			    rsp->req);
+			break;
 		case NOTIFY_ACK_TYPE:
 			if (pkt->handle == QLA_TGT_SKIP_HANDLE)
 				qlt_response_pkt_all_vps(vha, rsp,

drivers/scsi/qla2xxx/qla_mbx.c

@@ -560,6 +560,8 @@ qla2x00_load_ram(scsi_qla_host_t *vha, dma_addr_t req_dma, uint32_t risc_addr,
 }
 
 #define	EXTENDED_BB_CREDITS	BIT_0
+#define	NVME_ENABLE_FLAG	BIT_3
+
 /*
  * qla2x00_execute_fw
  *     Start adapter firmware.
@@ -601,6 +603,9 @@ qla2x00_execute_fw(scsi_qla_host_t *vha, uint32_t risc_addr)
 		} else
 			mcp->mb[4] = 0;
 
+		if (ql2xnvmeenable && IS_QLA27XX(ha))
+			mcp->mb[4] |= NVME_ENABLE_FLAG;
+
 		if (ha->flags.exlogins_enabled)
 			mcp->mb[4] |= ENABLE_EXTENDED_LOGIN;
 
@@ -941,6 +946,22 @@ qla2x00_get_fw_version(scsi_qla_host_t *vha)
 			ql_dbg(ql_dbg_mbx + ql_dbg_verbose, vha, 0x1191,
 			    "%s: Firmware supports Exchange Offload 0x%x\n",
 			    __func__, ha->fw_attributes_h);
+
+		/* bit 26 of fw_attributes */
+		if ((ha->fw_attributes_h & 0x400) && ql2xnvmeenable) {
+			struct init_cb_24xx *icb;
+
+			icb = (struct init_cb_24xx *)ha->init_cb;
+			/*
+			 * fw supports nvme and driver load
+			 * parameter requested nvme
+			 */
+			vha->flags.nvme_enabled = 1;
+			icb->firmware_options_2 &= cpu_to_le32(~0xf);
+			ha->zio_mode = 0;
+			ha->zio_timer = 0;
+		}
+
 	}
 
 	if (IS_QLA27XX(ha)) {

drivers/scsi/qla2xxx/qla_nvme.h

+/*
+ * QLogic Fibre Channel HBA Driver
+ * Copyright (c)  2003-2017 QLogic Corporation
+ *
+ * See LICENSE.qla2xxx for copyright and licensing details.
+ */
+#ifndef __QLA_NVME_H
+#define __QLA_NVME_H
+
+#include <linux/blk-mq.h>
+#include <uapi/scsi/fc/fc_fs.h>
+#include <uapi/scsi/fc/fc_els.h>
+#include <linux/nvme-fc-driver.h>
+
+#define NVME_ATIO_CMD_OFF 32
+#define NVME_FIRST_PACKET_CMDLEN (64 - NVME_ATIO_CMD_OFF)
+#define Q2T_NVME_NUM_TAGS 2048
+#define QLA_MAX_FC_SEGMENTS 64
+
+struct srb;
+struct nvme_private {
+	struct srb	*sp;
+	struct nvmefc_ls_req *fd;
+	struct work_struct ls_work;
+	int comp_status;
+};
+
+struct nvme_rport {
+	struct nvme_fc_port_info req;
+	struct list_head list;
+	struct fc_port *fcport;
+};
+
+#define COMMAND_NVME    0x88            /* Command Type FC-NVMe IOCB */
+struct cmd_nvme {
+	uint8_t entry_type;             /* Entry type. */
+	uint8_t entry_count;            /* Entry count. */
+	uint8_t sys_define;             /* System defined. */
+	uint8_t entry_status;           /* Entry Status. */
+
+	uint32_t handle;                /* System handle. */
+	uint16_t nport_handle;          /* N_PORT handle. */
+	uint16_t timeout;               /* Command timeout. */
+
+	uint16_t dseg_count;            /* Data segment count. */
+	uint16_t nvme_rsp_dsd_len;      /* NVMe RSP DSD length */
+
+	uint64_t rsvd;
+
+	uint16_t control_flags;         /* Control Flags */
+#define CF_NVME_ENABLE                  BIT_9
+#define CF_DIF_SEG_DESCR_ENABLE         BIT_3
+#define CF_DATA_SEG_DESCR_ENABLE        BIT_2
+#define CF_READ_DATA                    BIT_1
+#define CF_WRITE_DATA                   BIT_0
+
+	uint16_t nvme_cmnd_dseg_len;             /* Data segment length. */
+	uint32_t nvme_cmnd_dseg_address[2];      /* Data segment address. */
+	uint32_t nvme_rsp_dseg_address[2];       /* Data segment address. */
+
+	uint32_t byte_count;            /* Total byte count. */
+
+	uint8_t port_id[3];             /* PortID of destination port. */
+	uint8_t vp_index;
+
+	uint32_t nvme_data_dseg_address[2];      /* Data segment address. */
+	uint32_t nvme_data_dseg_len;             /* Data segment length. */
+};
+
+#define PT_LS4_REQUEST 0x89	/* Link Service pass-through IOCB (request) */
+struct pt_ls4_request {
+	uint8_t entry_type;
+	uint8_t entry_count;
+	uint8_t sys_define;
+	uint8_t entry_status;
+	uint32_t handle;
+	uint16_t status;
+	uint16_t nport_handle;
+	uint16_t tx_dseg_count;
+	uint8_t  vp_index;
+	uint8_t  rsvd;
+	uint16_t timeout;
+	uint16_t control_flags;
+#define CF_LS4_SHIFT		13
+#define CF_LS4_ORIGINATOR	0
+#define CF_LS4_RESPONDER	1
+#define CF_LS4_RESPONDER_TERM	2
+
+	uint16_t rx_dseg_count;
+	uint16_t rsvd2;
+	uint32_t exchange_address;
+	uint32_t rsvd3;
+	uint32_t rx_byte_count;
+	uint32_t tx_byte_count;
+	uint32_t dseg0_address[2];
+	uint32_t dseg0_len;
+	uint32_t dseg1_address[2];
+	uint32_t dseg1_len;
+};
+
+#define PT_LS4_UNSOL 0x56	/* pass-up unsolicited rec FC-NVMe request */
+struct pt_ls4_rx_unsol {
+	uint8_t entry_type;
+	uint8_t entry_count;
+	uint16_t rsvd0;
+	uint16_t rsvd1;
+	uint8_t vp_index;
+	uint8_t rsvd2;
+	uint16_t rsvd3;
+	uint16_t nport_handle;
+	uint16_t frame_size;
+	uint16_t rsvd4;
+	uint32_t exchange_address;
+	uint8_t d_id[3];
+	uint8_t r_ctl;
+	uint8_t s_id[3];
+	uint8_t cs_ctl;
+	uint8_t f_ctl[3];
+	uint8_t type;
+	uint16_t seq_cnt;
+	uint8_t df_ctl;
+	uint8_t seq_id;
+	uint16_t rx_id;
+	uint16_t ox_id;
+	uint32_t param;
+	uint32_t desc0;
+#define PT_LS4_PAYLOAD_OFFSET 0x2c
+#define PT_LS4_FIRST_PACKET_LEN 20
+	uint32_t desc_len;
+	uint32_t payload[3];
+};
+#endif

drivers/scsi/qla2xxx/qla_os.c

@@ -120,7 +120,11 @@ MODULE_PARM_DESC(ql2xmaxqdepth,
 		"Maximum queue depth to set for each LUN. "
 		"Default is 32.");
 
+#if (IS_ENABLED(CONFIG_NVME_FC))
+int ql2xenabledif;
+#else
 int ql2xenabledif = 2;
+#endif
 module_param(ql2xenabledif, int, S_IRUGO);
 MODULE_PARM_DESC(ql2xenabledif,
 		" Enable T10-CRC-DIF:\n"
@@ -129,6 +133,16 @@ MODULE_PARM_DESC(ql2xenabledif,
 		"  1 -- Enable DIF for all types\n"
 		"  2 -- Enable DIF for all types, except Type 0.\n");
 
+#if (IS_ENABLED(CONFIG_NVME_FC))
+int ql2xnvmeenable = 1;
+#else
+int ql2xnvmeenable;
+#endif
+module_param(ql2xnvmeenable, int, 0644);
+MODULE_PARM_DESC(ql2xnvmeenable,
+    "Enables NVME support. "
+    "0 - no NVMe.  Default is Y");
+
 int ql2xenablehba_err_chk = 2;
 module_param(ql2xenablehba_err_chk, int, S_IRUGO|S_IWUSR);
 MODULE_PARM_DESC(ql2xenablehba_err_chk,
@@ -267,6 +281,7 @@ static void qla2x00_clear_drv_active(struct qla_hw_data *);
 static void qla2x00_free_device(scsi_qla_host_t *);
 static void qla83xx_disable_laser(scsi_qla_host_t *vha);
 static int qla2xxx_map_queues(struct Scsi_Host *shost);
+static void qla2x00_destroy_deferred_work(struct qla_hw_data *);
 
 struct scsi_host_template qla2xxx_driver_template = {
 	.module			= THIS_MODULE,
@@ -695,7 +710,7 @@ qla2x00_sp_free_dma(void *ptr)
 	}
 
 end:
-	if (sp->type != SRB_NVME_CMD) {
+	if ((sp->type != SRB_NVME_CMD) && (sp->type != SRB_NVME_LS)) {
 		CMD_SP(cmd) = NULL;
 		qla2x00_rel_sp(sp);
 	}
@@ -1700,15 +1715,23 @@ qla2x00_abort_all_cmds(scsi_qla_host_t *vha, int res)
 			if (sp) {
 				req->outstanding_cmds[cnt] = NULL;
 				if (sp->cmd_type == TYPE_SRB) {
-					/*
-					 * Don't abort commands in adapter
-					 * during EEH recovery as it's not
-					 * accessible/responding.
-					 */
-					if (GET_CMD_SP(sp) &&
+					if ((sp->type == SRB_NVME_CMD) ||
+					    (sp->type == SRB_NVME_LS)) {
+						sp_get(sp);
+						spin_unlock_irqrestore(
+						    &ha->hardware_lock, flags);
+						qla_nvme_abort(ha, sp);
+						spin_lock_irqsave(
+						    &ha->hardware_lock, flags);
+					} else if (GET_CMD_SP(sp) &&
 					    !ha->flags.eeh_busy &&
 					    (sp->type == SRB_SCSI_CMD)) {
 						/*
+						 * Don't abort commands in
+						 * adapter during EEH
+						 * recovery as it's not
+						 * accessible/responding.
+						 *
 						 * Get a reference to the sp
 						 * and drop the lock. The
 						 * reference ensures this
@@ -3534,6 +3557,9 @@ qla2x00_remove_one(struct pci_dev *pdev)
 		return;
 
 	set_bit(UNLOADING, &base_vha->dpc_flags);
+
+	qla_nvme_delete(base_vha);
+
 	dma_free_coherent(&ha->pdev->dev,
 		base_vha->gnl.size, base_vha->gnl.l, base_vha->gnl.ldma);