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scsi: qedf: Add QLogic FastLinQ offload FCoE driver framework.

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The QLogic FastLinQ Driver for FCoE (qedf) is the FCoE specific module
for 41000 Series Converged Network Adapters by QLogic. This patch
consists of following changes:

- MAINTAINERS Makefile and Kconfig changes for qedf
- PCI driver registration
- libfc/fcoe host level initialization
- SCSI host template initialization and callbacks
- Debugfs and log level infrastructure
- Link handling
- Firmware interface structures
- QED core module initialization
- Light L2 interface callbacks
- I/O request initialization
- Firmware I/O completion handling
- Firmware ELS request/response handling
- FIP request/response handled by the driver itself

Signed-off-by: Nilesh Javali <nilesh.javali@cavium.com>
Signed-off-by: Manish Rangankar <manish.rangankar@cavium.com>
Signed-off-by: Saurav Kashyap <saurav.kashyap@cavium.com>
Signed-off-by: Arun Easi <arun.easi@cavium.com>
Signed-off-by: Chad Dupuis <chad.dupuis@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Dupuis, Chad 2017-02-15 06:28:23 -08:00 committed by Martin K. Petersen
parent 67f2db8792
commit 61d8658b4a
16 changed files with 8816 additions and 0 deletions
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6
MAINTAINERS
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@ -10242,6 +10242,12 @@ L: linux-scsi@vger.kernel.org
S: Supported S: Supported
F: drivers/scsi/qedi/ F: drivers/scsi/qedi/
QLOGIC QL41xxx FCOE DRIVER
M: QLogic-Storage-Upstream@cavium.com
L: linux-scsi@vger.kernel.org
S: Supported
F: drivers/scsi/qedf/
QNX4 FILESYSTEM QNX4 FILESYSTEM
M: Anders Larsen <al@alarsen.net> M: Anders Larsen <al@alarsen.net>
W: http://www.alarsen.net/linux/qnx4fs/ W: http://www.alarsen.net/linux/qnx4fs/

1
drivers/scsi/Kconfig
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@ -1235,6 +1235,7 @@ config SCSI_QLOGICPTI
source "drivers/scsi/qla2xxx/Kconfig" source "drivers/scsi/qla2xxx/Kconfig"
source "drivers/scsi/qla4xxx/Kconfig" source "drivers/scsi/qla4xxx/Kconfig"
source "drivers/scsi/qedi/Kconfig" source "drivers/scsi/qedi/Kconfig"
source "drivers/scsi/qedf/Kconfig"
config SCSI_LPFC config SCSI_LPFC
tristate "Emulex LightPulse Fibre Channel Support" tristate "Emulex LightPulse Fibre Channel Support"

1
drivers/scsi/Makefile
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@ -41,6 +41,7 @@ obj-$(CONFIG_FCOE) += fcoe/
obj-$(CONFIG_FCOE_FNIC) += fnic/ obj-$(CONFIG_FCOE_FNIC) += fnic/
obj-$(CONFIG_SCSI_SNIC) += snic/ obj-$(CONFIG_SCSI_SNIC) += snic/
obj-$(CONFIG_SCSI_BNX2X_FCOE) += libfc/ fcoe/ bnx2fc/ obj-$(CONFIG_SCSI_BNX2X_FCOE) += libfc/ fcoe/ bnx2fc/
obj-$(CONFIG_QEDF) += qedf/
obj-$(CONFIG_ISCSI_TCP) += libiscsi.o libiscsi_tcp.o iscsi_tcp.o obj-$(CONFIG_ISCSI_TCP) += libiscsi.o libiscsi_tcp.o iscsi_tcp.o
obj-$(CONFIG_INFINIBAND_ISER) += libiscsi.o obj-$(CONFIG_INFINIBAND_ISER) += libiscsi.o
obj-$(CONFIG_ISCSI_BOOT_SYSFS) += iscsi_boot_sysfs.o obj-$(CONFIG_ISCSI_BOOT_SYSFS) += iscsi_boot_sysfs.o

11
drivers/scsi/qedf/Kconfig Normal file
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@ -0,0 +1,11 @@
config QEDF
tristate "QLogic QEDF 25/40/100Gb FCoE Initiator Driver Support"
depends on PCI && SCSI
depends on QED
depends on LIBFC
depends on LIBFCOE
select QED_LL2
select QED_FCOE
---help---
This driver supports FCoE offload for the QLogic FastLinQ
41000 Series Converged Network Adapters.

5
drivers/scsi/qedf/Makefile Normal file
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@ -0,0 +1,5 @@
obj-$(CONFIG_QEDF) := qedf.o
qedf-y = qedf_dbg.o qedf_main.o qedf_io.o qedf_fip.o \
qedf_attr.o qedf_els.o
qedf-$(CONFIG_DEBUG_FS) += qedf_debugfs.o

545
drivers/scsi/qedf/qedf.h Normal file
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@ -0,0 +1,545 @@
/*
* QLogic FCoE Offload Driver
* Copyright (c) 2016 Cavium Inc.
*
* This software is available under the terms of the GNU General Public License
* (GPL) Version 2, available from the file COPYING in the main directory of
* this source tree.
*/
#ifndef _QEDFC_H_
#define _QEDFC_H_
#include <scsi/libfcoe.h>
#include <scsi/libfc.h>
#include <scsi/fc/fc_fip.h>
#include <scsi/fc/fc_fc2.h>
#include <scsi/scsi_tcq.h>
#include <scsi/fc_encode.h>
#include <linux/version.h>
/* qedf_hsi.h needs to before included any qed includes */
#include "qedf_hsi.h"
#include <linux/qed/qed_if.h>
#include <linux/qed/qed_fcoe_if.h>
#include <linux/qed/qed_ll2_if.h>
#include "qedf_version.h"
#include "qedf_dbg.h"
/* Helpers to extract upper and lower 32-bits of pointer */
#define U64_HI(val) ((u32)(((u64)(val)) >> 32))
#define U64_LO(val) ((u32)(((u64)(val)) & 0xffffffff))
#define QEDF_DESCR "QLogic FCoE Offload Driver"
#define QEDF_MODULE_NAME "qedf"
#define QEDF_MIN_XID 0
#define QEDF_MAX_SCSI_XID (NUM_TASKS_PER_CONNECTION - 1)
#define QEDF_MAX_ELS_XID 4095
#define QEDF_FLOGI_RETRY_CNT 3
#define QEDF_RPORT_RETRY_CNT 255
#define QEDF_MAX_SESSIONS 1024
#define QEDF_MAX_PAYLOAD 2048
#define QEDF_MAX_BDS_PER_CMD 256
#define QEDF_MAX_BD_LEN 0xffff
#define QEDF_BD_SPLIT_SZ 0x1000
#define QEDF_PAGE_SIZE 4096
#define QED_HW_DMA_BOUNDARY 0xfff
#define QEDF_MAX_SGLEN_FOR_CACHESGL ((1U << 16) - 1)
#define QEDF_MFS (QEDF_MAX_PAYLOAD + \
sizeof(struct fc_frame_header))
#define QEDF_MAX_NPIV 64
#define QEDF_TM_TIMEOUT 10
#define QEDF_ABORT_TIMEOUT 10
#define QEDF_CLEANUP_TIMEOUT 10
#define QEDF_MAX_CDB_LEN 16
#define UPSTREAM_REMOVE 1
#define UPSTREAM_KEEP 1
struct qedf_mp_req {
uint8_t tm_flags;
uint32_t req_len;
void *req_buf;
dma_addr_t req_buf_dma;
struct fcoe_sge *mp_req_bd;
dma_addr_t mp_req_bd_dma;
struct fc_frame_header req_fc_hdr;
uint32_t resp_len;
void *resp_buf;
dma_addr_t resp_buf_dma;
struct fcoe_sge *mp_resp_bd;
dma_addr_t mp_resp_bd_dma;
struct fc_frame_header resp_fc_hdr;
};
struct qedf_els_cb_arg {
struct qedf_ioreq *aborted_io_req;
struct qedf_ioreq *io_req;
u8 op; /* Used to keep track of ELS op */
uint16_t l2_oxid;
u32 offset; /* Used for sequence cleanup */
u8 r_ctl; /* Used for sequence cleanup */
};
enum qedf_ioreq_event {
QEDF_IOREQ_EV_ABORT_SUCCESS,
QEDF_IOREQ_EV_ABORT_FAILED,
QEDF_IOREQ_EV_SEND_RRQ,
QEDF_IOREQ_EV_ELS_TMO,
QEDF_IOREQ_EV_ELS_ERR_DETECT,
QEDF_IOREQ_EV_ELS_FLUSH,
QEDF_IOREQ_EV_CLEANUP_SUCCESS,
QEDF_IOREQ_EV_CLEANUP_FAILED,
};
#define FC_GOOD 0
#define FCOE_FCP_RSP_FLAGS_FCP_RESID_OVER (0x1<<2)
#define FCOE_FCP_RSP_FLAGS_FCP_RESID_UNDER (0x1<<3)
#define CMD_SCSI_STATUS(Cmnd) ((Cmnd)->SCp.Status)
#define FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID (0x1<<0)
#define FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID (0x1<<1)
struct qedf_ioreq {
struct list_head link;
uint16_t xid;
struct scsi_cmnd *sc_cmd;
bool use_slowpath; /* Use slow SGL for this I/O */
#define QEDF_SCSI_CMD 1
#define QEDF_TASK_MGMT_CMD 2
#define QEDF_ABTS 3
#define QEDF_ELS 4
#define QEDF_CLEANUP 5
#define QEDF_SEQ_CLEANUP 6
u8 cmd_type;
#define QEDF_CMD_OUTSTANDING 0x0
#define QEDF_CMD_IN_ABORT 0x1
#define QEDF_CMD_IN_CLEANUP 0x2
#define QEDF_CMD_SRR_SENT 0x3
u8 io_req_flags;
struct qedf_rport *fcport;
unsigned long flags;
enum qedf_ioreq_event event;
size_t data_xfer_len;
struct kref refcount;
struct qedf_cmd_mgr *cmd_mgr;
struct io_bdt *bd_tbl;
struct delayed_work timeout_work;
struct completion tm_done;
struct completion abts_done;
struct fcoe_task_context *task;
int idx;
/*
* Need to allocate enough room for both sense data and FCP response data
* which has a max length of 8 bytes according to spec.
*/
#define QEDF_SCSI_SENSE_BUFFERSIZE (SCSI_SENSE_BUFFERSIZE + 8)
uint8_t *sense_buffer;
dma_addr_t sense_buffer_dma;
u32 fcp_resid;
u32 fcp_rsp_len;
u32 fcp_sns_len;
u8 cdb_status;
u8 fcp_status;
u8 fcp_rsp_code;
u8 scsi_comp_flags;
#define QEDF_MAX_REUSE 0xfff
u16 reuse_count;
struct qedf_mp_req mp_req;
void (*cb_func)(struct qedf_els_cb_arg *cb_arg);
struct qedf_els_cb_arg *cb_arg;
int fp_idx;
unsigned int cpu;
unsigned int int_cpu;
#define QEDF_IOREQ_SLOW_SGE 0
#define QEDF_IOREQ_SINGLE_SGE 1
#define QEDF_IOREQ_FAST_SGE 2
u8 sge_type;
struct delayed_work rrq_work;
/* Used for sequence level recovery; i.e. REC/SRR */
uint32_t rx_buf_off;
uint32_t tx_buf_off;
uint32_t rx_id;
uint32_t task_retry_identifier;
/*
* Used to tell if we need to return a SCSI command
* during some form of error processing.
*/
bool return_scsi_cmd_on_abts;
};
extern struct workqueue_struct *qedf_io_wq;
struct qedf_rport {
spinlock_t rport_lock;
#define QEDF_RPORT_SESSION_READY 1
#define QEDF_RPORT_UPLOADING_CONNECTION 2
unsigned long flags;
unsigned long retry_delay_timestamp;
struct fc_rport *rport;
struct fc_rport_priv *rdata;
struct qedf_ctx *qedf;
u32 handle; /* Handle from qed */
u32 fw_cid; /* fw_cid from qed */
void __iomem *p_doorbell;
/* Send queue management */
atomic_t free_sqes;
atomic_t num_active_ios;
struct fcoe_wqe *sq;
dma_addr_t sq_dma;
u16 sq_prod_idx;
u16 fw_sq_prod_idx;
u16 sq_con_idx;
u32 sq_mem_size;
void *sq_pbl;
dma_addr_t sq_pbl_dma;
u32 sq_pbl_size;
u32 sid;
#define QEDF_RPORT_TYPE_DISK 1
#define QEDF_RPORT_TYPE_TAPE 2
uint dev_type; /* Disk or tape */
struct list_head peers;
};
/* Used to contain LL2 skb's in ll2_skb_list */
struct qedf_skb_work {
struct work_struct work;
struct sk_buff *skb;
struct qedf_ctx *qedf;
};
struct qedf_fastpath {
#define QEDF_SB_ID_NULL 0xffff
u16 sb_id;
struct qed_sb_info *sb_info;
struct qedf_ctx *qedf;
/* Keep track of number of completions on this fastpath */
unsigned long completions;
uint32_t cq_num_entries;
};
/* Used to pass fastpath information needed to process CQEs */
struct qedf_io_work {
struct work_struct work;
struct fcoe_cqe cqe;
struct qedf_ctx *qedf;
struct fc_frame *fp;
};
struct qedf_glbl_q_params {
u64 hw_p_cq; /* Completion queue PBL */
u64 hw_p_rq; /* Request queue PBL */
u64 hw_p_cmdq; /* Command queue PBL */
};
struct global_queue {
struct fcoe_cqe *cq;
dma_addr_t cq_dma;
u32 cq_mem_size;
u32 cq_cons_idx; /* Completion queue consumer index */
u32 cq_prod_idx;
void *cq_pbl;
dma_addr_t cq_pbl_dma;
u32 cq_pbl_size;
};
/* I/O tracing entry */
#define QEDF_IO_TRACE_SIZE 2048
struct qedf_io_log {
#define QEDF_IO_TRACE_REQ 0
#define QEDF_IO_TRACE_RSP 1
uint8_t direction;
uint16_t task_id;
uint32_t port_id; /* Remote port fabric ID */
int lun;
char op; /* SCSI CDB */
uint8_t lba[4];
unsigned int bufflen; /* SCSI buffer length */
unsigned int sg_count; /* Number of SG elements */
int result; /* Result passed back to mid-layer */
unsigned long jiffies; /* Time stamp when I/O logged */
int refcount; /* Reference count for task id */
unsigned int req_cpu; /* CPU that the task is queued on */
unsigned int int_cpu; /* Interrupt CPU that the task is received on */
unsigned int rsp_cpu; /* CPU that task is returned on */
u8 sge_type; /* Did we take the slow, single or fast SGE path */
};
/* Number of entries in BDQ */
#define QEDF_BDQ_SIZE 256
#define QEDF_BDQ_BUF_SIZE 2072
/* DMA coherent buffers for BDQ */
struct qedf_bdq_buf {
void *buf_addr;
dma_addr_t buf_dma;
};
/* Main adapter struct */
struct qedf_ctx {
struct qedf_dbg_ctx dbg_ctx;
struct fcoe_ctlr ctlr;
struct fc_lport *lport;
u8 data_src_addr[ETH_ALEN];
#define QEDF_LINK_DOWN 0
#define QEDF_LINK_UP 1
atomic_t link_state;
#define QEDF_DCBX_PENDING 0
#define QEDF_DCBX_DONE 1
atomic_t dcbx;
uint16_t max_scsi_xid;
uint16_t max_els_xid;
#define QEDF_NULL_VLAN_ID -1
#define QEDF_FALLBACK_VLAN 1002
#define QEDF_DEFAULT_PRIO 3
int vlan_id;
uint vlan_hw_insert:1;
struct qed_dev *cdev;
struct qed_dev_fcoe_info dev_info;
struct qed_int_info int_info;
uint16_t last_command;
spinlock_t hba_lock;
struct pci_dev *pdev;
u64 wwnn;
u64 wwpn;
u8 __aligned(16) mac[ETH_ALEN];
struct list_head fcports;
atomic_t num_offloads;
unsigned int curr_conn_id;
struct workqueue_struct *ll2_recv_wq;
struct workqueue_struct *link_update_wq;
struct delayed_work link_update;
struct delayed_work link_recovery;
struct completion flogi_compl;
struct completion fipvlan_compl;
/*
* Used to tell if we're in the window where we are waiting for
* the link to come back up before informting fcoe that the link is
* done.
*/
atomic_t link_down_tmo_valid;
#define QEDF_TIMER_INTERVAL (1 * HZ)
struct timer_list timer; /* One second book keeping timer */
#define QEDF_DRAIN_ACTIVE 1
#define QEDF_LL2_STARTED 2
#define QEDF_UNLOADING 3
#define QEDF_GRCDUMP_CAPTURE 4
#define QEDF_IN_RECOVERY 5
#define QEDF_DBG_STOP_IO 6
unsigned long flags; /* Miscellaneous state flags */
int fipvlan_retries;
u8 num_queues;
struct global_queue **global_queues;
/* Pointer to array of queue structures */
struct qedf_glbl_q_params *p_cpuq;
/* Physical address of array of queue structures */
dma_addr_t hw_p_cpuq;
struct qedf_bdq_buf bdq[QEDF_BDQ_SIZE];
void *bdq_pbl;
dma_addr_t bdq_pbl_dma;
size_t bdq_pbl_mem_size;
void *bdq_pbl_list;
dma_addr_t bdq_pbl_list_dma;
u8 bdq_pbl_list_num_entries;
void __iomem *bdq_primary_prod;
void __iomem *bdq_secondary_prod;
uint16_t bdq_prod_idx;
/* Structure for holding all the fastpath for this qedf_ctx */
struct qedf_fastpath *fp_array;
struct qed_fcoe_tid tasks;
struct qedf_cmd_mgr *cmd_mgr;
/* Holds the PF parameters we pass to qed to start he FCoE function */
struct qed_pf_params pf_params;
/* Used to time middle path ELS and TM commands */
struct workqueue_struct *timer_work_queue;
#define QEDF_IO_WORK_MIN 64
mempool_t *io_mempool;
struct workqueue_struct *dpc_wq;
u32 slow_sge_ios;
u32 fast_sge_ios;
u32 single_sge_ios;
uint8_t *grcdump;
uint32_t grcdump_size;
struct qedf_io_log io_trace_buf[QEDF_IO_TRACE_SIZE];
spinlock_t io_trace_lock;
uint16_t io_trace_idx;
bool stop_io_on_error;
u32 flogi_cnt;
u32 flogi_failed;
/* Used for fc statistics */
u64 input_requests;
u64 output_requests;
u64 control_requests;
u64 packet_aborts;
u64 alloc_failures;
};
struct io_bdt {
struct qedf_ioreq *io_req;
struct fcoe_sge *bd_tbl;
dma_addr_t bd_tbl_dma;
u16 bd_valid;
};
struct qedf_cmd_mgr {
struct qedf_ctx *qedf;
u16 idx;
struct io_bdt **io_bdt_pool;
#define FCOE_PARAMS_NUM_TASKS 4096
struct qedf_ioreq cmds[FCOE_PARAMS_NUM_TASKS];
spinlock_t lock;
atomic_t free_list_cnt;
};
/* Stolen from qed_cxt_api.h and adapted for qed_fcoe_info
* Usage:
*
* void *ptr;
* ptr = qedf_get_task_mem(&qedf->tasks, 128);
*/
static inline void *qedf_get_task_mem(struct qed_fcoe_tid *info, u32 tid)
{
return (void *)(info->blocks[tid / info->num_tids_per_block] +
(tid % info->num_tids_per_block) * info->size);
}
static inline void qedf_stop_all_io(struct qedf_ctx *qedf)
{
set_bit(QEDF_DBG_STOP_IO, &qedf->flags);
}
/*
* Externs
*/
#define QEDF_DEFAULT_LOG_MASK 0x3CFB6
extern const struct qed_fcoe_ops *qed_ops;
extern uint qedf_dump_frames;
extern uint qedf_io_tracing;
extern uint qedf_stop_io_on_error;
extern uint qedf_link_down_tmo;
#define QEDF_RETRY_DELAY_MAX 20 /* 2 seconds */
extern bool qedf_retry_delay;
extern uint qedf_debug;
extern struct qedf_cmd_mgr *qedf_cmd_mgr_alloc(struct qedf_ctx *qedf);
extern void qedf_cmd_mgr_free(struct qedf_cmd_mgr *cmgr);
extern int qedf_queuecommand(struct Scsi_Host *host,
struct scsi_cmnd *sc_cmd);
extern void qedf_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb);
extern void qedf_update_src_mac(struct fc_lport *lport, u8 *addr);
extern u8 *qedf_get_src_mac(struct fc_lport *lport);
extern void qedf_fip_recv(struct qedf_ctx *qedf, struct sk_buff *skb);
extern void qedf_fcoe_send_vlan_req(struct qedf_ctx *qedf);
extern void qedf_scsi_completion(struct qedf_ctx *qedf, struct fcoe_cqe *cqe,
struct qedf_ioreq *io_req);
extern void qedf_process_warning_compl(struct qedf_ctx *qedf,
struct fcoe_cqe *cqe, struct qedf_ioreq *io_req);
extern void qedf_process_error_detect(struct qedf_ctx *qedf,
struct fcoe_cqe *cqe, struct qedf_ioreq *io_req);
extern void qedf_flush_active_ios(struct qedf_rport *fcport, int lun);
extern void qedf_release_cmd(struct kref *ref);
extern int qedf_initiate_abts(struct qedf_ioreq *io_req,
bool return_scsi_cmd_on_abts);
extern void qedf_process_abts_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe,
struct qedf_ioreq *io_req);
extern struct qedf_ioreq *qedf_alloc_cmd(struct qedf_rport *fcport,
u8 cmd_type);
extern struct device_attribute *qedf_host_attrs[];
extern void qedf_cmd_timer_set(struct qedf_ctx *qedf, struct qedf_ioreq *io_req,
unsigned int timer_msec);
extern int qedf_init_mp_req(struct qedf_ioreq *io_req);
extern void qedf_init_mp_task(struct qedf_ioreq *io_req,
struct fcoe_task_context *task_ctx);
extern void qedf_add_to_sq(struct qedf_rport *fcport, u16 xid,
u32 ptu_invalidate, enum fcoe_task_type req_type, u32 offset);
extern void qedf_ring_doorbell(struct qedf_rport *fcport);
extern void qedf_process_els_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe,
struct qedf_ioreq *els_req);
extern int qedf_send_rrq(struct qedf_ioreq *aborted_io_req);
extern int qedf_send_adisc(struct qedf_rport *fcport, struct fc_frame *fp);
extern int qedf_initiate_cleanup(struct qedf_ioreq *io_req,
bool return_scsi_cmd_on_abts);
extern void qedf_process_cleanup_compl(struct qedf_ctx *qedf,
struct fcoe_cqe *cqe, struct qedf_ioreq *io_req);
extern int qedf_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags);
extern void qedf_process_tmf_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe,
struct qedf_ioreq *io_req);
extern void qedf_process_cqe(struct qedf_ctx *qedf, struct fcoe_cqe *cqe);
extern void qedf_scsi_done(struct qedf_ctx *qedf, struct qedf_ioreq *io_req,
int result);
extern void qedf_set_vlan_id(struct qedf_ctx *qedf, int vlan_id);
extern void qedf_create_sysfs_ctx_attr(struct qedf_ctx *qedf);
extern void qedf_remove_sysfs_ctx_attr(struct qedf_ctx *qedf);
extern void qedf_capture_grc_dump(struct qedf_ctx *qedf);
extern void qedf_wait_for_upload(struct qedf_ctx *qedf);
extern void qedf_process_unsol_compl(struct qedf_ctx *qedf, uint16_t que_idx,
struct fcoe_cqe *cqe);
extern void qedf_restart_rport(struct qedf_rport *fcport);
extern int qedf_send_rec(struct qedf_ioreq *orig_io_req);
extern int qedf_post_io_req(struct qedf_rport *fcport,
struct qedf_ioreq *io_req);
extern void qedf_process_seq_cleanup_compl(struct qedf_ctx *qedf,
struct fcoe_cqe *cqe, struct qedf_ioreq *io_req);
extern int qedf_send_flogi(struct qedf_ctx *qedf);
extern void qedf_fp_io_handler(struct work_struct *work);
#define FCOE_WORD_TO_BYTE 4
#define QEDF_MAX_TASK_NUM 0xFFFF
struct fip_vlan {
struct ethhdr eth;
struct fip_header fip;
struct {
struct fip_mac_desc mac;
struct fip_wwn_desc wwnn;
} desc;
};
/* SQ/CQ Sizes */
#define GBL_RSVD_TASKS 16
#define NUM_TASKS_PER_CONNECTION 1024
#define NUM_RW_TASKS_PER_CONNECTION 512
#define FCOE_PARAMS_CQ_NUM_ENTRIES FCOE_PARAMS_NUM_TASKS
#define FCOE_PARAMS_CMDQ_NUM_ENTRIES FCOE_PARAMS_NUM_TASKS
#define SQ_NUM_ENTRIES NUM_TASKS_PER_CONNECTION
#define QEDF_FCOE_PARAMS_GL_RQ_PI 0
#define QEDF_FCOE_PARAMS_GL_CMD_PI 1
#define QEDF_READ (1 << 1)
#define QEDF_WRITE (1 << 0)
#define MAX_FIBRE_LUNS 0xffffffff
#define QEDF_MAX_NUM_CQS 8
/*
* PCI function probe defines
*/
/* Probe/remove called during normal PCI probe */
#define QEDF_MODE_NORMAL 0
/* Probe/remove called from qed error recovery */
#define QEDF_MODE_RECOVERY 1
#define SUPPORTED_25000baseKR_Full (1<<27)
#define SUPPORTED_50000baseKR2_Full (1<<28)
#define SUPPORTED_100000baseKR4_Full (1<<29)
#define SUPPORTED_100000baseCR4_Full (1<<30)
#endif

165
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/*
* QLogic FCoE Offload Driver
* Copyright (c) 2016 Cavium Inc.
*
* This software is available under the terms of the GNU General Public License
* (GPL) Version 2, available from the file COPYING in the main directory of
* this source tree.
*/
#include "qedf.h"
static ssize_t
qedf_fcoe_mac_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct fc_lport *lport = shost_priv(class_to_shost(dev));
u32 port_id;
u8 lport_src_id[3];
u8 fcoe_mac[6];
port_id = fc_host_port_id(lport->host);
lport_src_id[2] = (port_id & 0x000000FF);
lport_src_id[1] = (port_id & 0x0000FF00) >> 8;
lport_src_id[0] = (port_id & 0x00FF0000) >> 16;
fc_fcoe_set_mac(fcoe_mac, lport_src_id);
return scnprintf(buf, PAGE_SIZE, "%pM\n", fcoe_mac);
}
static DEVICE_ATTR(fcoe_mac, S_IRUGO, qedf_fcoe_mac_show, NULL);
struct device_attribute *qedf_host_attrs[] = {
&dev_attr_fcoe_mac,
NULL,
};
extern const struct qed_fcoe_ops *qed_ops;
inline bool qedf_is_vport(struct qedf_ctx *qedf)
{
return (!(qedf->lport->vport == NULL));
}
/* Get base qedf for physical port from vport */
static struct qedf_ctx *qedf_get_base_qedf(struct qedf_ctx *qedf)
{
struct fc_lport *lport;
struct fc_lport *base_lport;
if (!(qedf_is_vport(qedf)))
return NULL;
lport = qedf->lport;
base_lport = shost_priv(vport_to_shost(lport->vport));
return (struct qedf_ctx *)(lport_priv(base_lport));
}
void qedf_capture_grc_dump(struct qedf_ctx *qedf)
{
struct qedf_ctx *base_qedf;
/* Make sure we use the base qedf to take the GRC dump */
if (qedf_is_vport(qedf))
base_qedf = qedf_get_base_qedf(qedf);
else
base_qedf = qedf;
if (test_bit(QEDF_GRCDUMP_CAPTURE, &base_qedf->flags)) {
QEDF_INFO(&(base_qedf->dbg_ctx), QEDF_LOG_INFO,
"GRC Dump already captured.\n");
return;
}
qedf_get_grc_dump(base_qedf->cdev, qed_ops->common,
&base_qedf->grcdump, &base_qedf->grcdump_size);
QEDF_ERR(&(base_qedf->dbg_ctx), "GRC Dump captured.\n");
set_bit(QEDF_GRCDUMP_CAPTURE, &base_qedf->flags);
qedf_uevent_emit(base_qedf->lport->host, QEDF_UEVENT_CODE_GRCDUMP,
NULL);
}
static ssize_t
qedf_sysfs_read_grcdump(struct file *filep, struct kobject *kobj,
struct bin_attribute *ba, char *buf, loff_t off,
size_t count)
{
ssize_t ret = 0;
struct fc_lport *lport = shost_priv(dev_to_shost(container_of(kobj,
struct device, kobj)));
struct qedf_ctx *qedf = lport_priv(lport);
if (test_bit(QEDF_GRCDUMP_CAPTURE, &qedf->flags)) {
ret = memory_read_from_buffer(buf, count, &off,
qedf->grcdump, qedf->grcdump_size);
} else {
QEDF_ERR(&(qedf->dbg_ctx), "GRC Dump not captured!\n");
}
return ret;
}
static ssize_t
qedf_sysfs_write_grcdump(struct file *filep, struct kobject *kobj,
struct bin_attribute *ba, char *buf, loff_t off,
size_t count)
{
struct fc_lport *lport = NULL;
struct qedf_ctx *qedf = NULL;
long reading;
int ret = 0;
char msg[40];
if (off != 0)
return ret;
lport = shost_priv(dev_to_shost(container_of(kobj,
struct device, kobj)));
qedf = lport_priv(lport);
buf[1] = 0;
ret = kstrtol(buf, 10, &reading);
if (ret) {
QEDF_ERR(&(qedf->dbg_ctx), "Invalid input, err(%d)\n", ret);
return ret;
}
memset(msg, 0, sizeof(msg));
switch (reading) {
case 0:
memset(qedf->grcdump, 0, qedf->grcdump_size);
clear_bit(QEDF_GRCDUMP_CAPTURE, &qedf->flags);
break;
case 1:
qedf_capture_grc_dump(qedf);
break;
}
return count;
}
static struct bin_attribute sysfs_grcdump_attr = {
.attr = {
.name = "grcdump",
.mode = S_IRUSR | S_IWUSR,
},
.size = 0,
.read = qedf_sysfs_read_grcdump,
.write = qedf_sysfs_write_grcdump,
};
static struct sysfs_bin_attrs bin_file_entries[] = {
{"grcdump", &sysfs_grcdump_attr},
{NULL},
};
void qedf_create_sysfs_ctx_attr(struct qedf_ctx *qedf)
{
qedf_create_sysfs_attr(qedf->lport->host, bin_file_entries);
}
void qedf_remove_sysfs_ctx_attr(struct qedf_ctx *qedf)
{
qedf_remove_sysfs_attr(qedf->lport->host, bin_file_entries);
}

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/*
* QLogic FCoE Offload Driver
* Copyright (c) 2016 Cavium Inc.
*
* This software is available under the terms of the GNU General Public License
* (GPL) Version 2, available from the file COPYING in the main directory of
* this source tree.
*/
#include "qedf_dbg.h"
#include <linux/vmalloc.h>
void
qedf_dbg_err(struct qedf_dbg_ctx *qedf, const char *func, u32 line,
const char *fmt, ...)
{
va_list va;
struct va_format vaf;
char nfunc[32];
memset(nfunc, 0, sizeof(nfunc));
memcpy(nfunc, func, sizeof(nfunc) - 1);
va_start(va, fmt);
vaf.fmt = fmt;
vaf.va = &va;
if (likely(qedf) && likely(qedf->pdev))
pr_err("[%s]:[%s:%d]:%d: %pV", dev_name(&(qedf->pdev->dev)),
nfunc, line, qedf->host_no, &vaf);
else
pr_err("[0000:00:00.0]:[%s:%d]: %pV", nfunc, line, &vaf);
va_end(va);
}
void
qedf_dbg_warn(struct qedf_dbg_ctx *qedf, const char *func, u32 line,
const char *fmt, ...)
{
va_list va;
struct va_format vaf;
char nfunc[32];
memset(nfunc, 0, sizeof(nfunc));
memcpy(nfunc, func, sizeof(nfunc) - 1);
va_start(va, fmt);
vaf.fmt = fmt;
vaf.va = &va;
if (!(qedf_debug & QEDF_LOG_WARN))
goto ret;
if (likely(qedf) && likely(qedf->pdev))
pr_warn("[%s]:[%s:%d]:%d: %pV", dev_name(&(qedf->pdev->dev)),
nfunc, line, qedf->host_no, &vaf);
else
pr_warn("[0000:00:00.0]:[%s:%d]: %pV", nfunc, line, &vaf);
ret:
va_end(va);
}
void
qedf_dbg_notice(struct qedf_dbg_ctx *qedf, const char *func, u32 line,
const char *fmt, ...)
{
va_list va;
struct va_format vaf;
char nfunc[32];
memset(nfunc, 0, sizeof(nfunc));
memcpy(nfunc, func, sizeof(nfunc) - 1);
va_start(va, fmt);
vaf.fmt = fmt;
vaf.va = &va;
if (!(qedf_debug & QEDF_LOG_NOTICE))
goto ret;
if (likely(qedf) && likely(qedf->pdev))
pr_notice("[%s]:[%s:%d]:%d: %pV",
dev_name(&(qedf->pdev->dev)), nfunc, line,
qedf->host_no, &vaf);
else
pr_notice("[0000:00:00.0]:[%s:%d]: %pV", nfunc, line, &vaf);
ret:
va_end(va);
}
void
qedf_dbg_info(struct qedf_dbg_ctx *qedf, const char *func, u32 line,
u32 level, const char *fmt, ...)
{
va_list va;
struct va_format vaf;
char nfunc[32];
memset(nfunc, 0, sizeof(nfunc));
memcpy(nfunc, func, sizeof(nfunc) - 1);
va_start(va, fmt);
vaf.fmt = fmt;
vaf.va = &va;
if (!(qedf_debug & level))
goto ret;
if (likely(qedf) && likely(qedf->pdev))
pr_info("[%s]:[%s:%d]:%d: %pV", dev_name(&(qedf->pdev->dev)),
nfunc, line, qedf->host_no, &vaf);
else
pr_info("[0000:00:00.0]:[%s:%d]: %pV", nfunc, line, &vaf);
ret:
va_end(va);
}
int
qedf_alloc_grc_dump_buf(u8 **buf, uint32_t len)
{
*buf = vmalloc(len);
if (!(*buf))
return -ENOMEM;
memset(*buf, 0, len);
return 0;
}
void
qedf_free_grc_dump_buf(uint8_t **buf)
{
vfree(*buf);
*buf = NULL;
}
int
qedf_get_grc_dump(struct qed_dev *cdev, const struct qed_common_ops *common,
u8 **buf, uint32_t *grcsize)
{
if (!*buf)
return -EINVAL;
return common->dbg_grc(cdev, *buf, grcsize);
}
void
qedf_uevent_emit(struct Scsi_Host *shost, u32 code, char *msg)
{
char event_string[40];
char *envp[] = {event_string, NULL};
memset(event_string, 0, sizeof(event_string));
switch (code) {
case QEDF_UEVENT_CODE_GRCDUMP:
if (msg)
strncpy(event_string, msg, strlen(msg));
else
sprintf(event_string, "GRCDUMP=%u", shost->host_no);
break;
default:
/* do nothing */
break;
}
kobject_uevent_env(&shost->shost_gendev.kobj, KOBJ_CHANGE, envp);
}
int
qedf_create_sysfs_attr(struct Scsi_Host *shost, struct sysfs_bin_attrs *iter)
{
int ret = 0;
for (; iter->name; iter++) {
ret = sysfs_create_bin_file(&shost->shost_gendev.kobj,
iter->attr);
if (ret)
pr_err("Unable to create sysfs %s attr, err(%d).\n",
iter->name, ret);
}
return ret;
}
void
qedf_remove_sysfs_attr(struct Scsi_Host *shost, struct sysfs_bin_attrs *iter)
{
for (; iter->name; iter++)
sysfs_remove_bin_file(&shost->shost_gendev.kobj, iter->attr);
}

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/*
* QLogic FCoE Offload Driver
* Copyright (c) 2016 Cavium Inc.
*
* This software is available under the terms of the GNU General Public License
* (GPL) Version 2, available from the file COPYING in the main directory of
* this source tree.
*/
#ifndef _QEDF_DBG_H_
#define _QEDF_DBG_H_
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/compiler.h>
#include <linux/string.h>
#include <linux/version.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <scsi/scsi_transport.h>
#include <linux/fs.h>
#include <linux/qed/common_hsi.h>
#include <linux/qed/qed_if.h>
extern uint qedf_debug;
/* Debug print level definitions */
#define QEDF_LOG_DEFAULT 0x1 /* Set default logging mask */
#define QEDF_LOG_INFO 0x2 /*
* Informational logs,
* MAC address, WWPN, WWNN
*/
#define QEDF_LOG_DISC 0x4 /* Init, discovery, rport */
#define QEDF_LOG_LL2 0x8 /* LL2, VLAN logs */
#define QEDF_LOG_CONN 0x10 /* Connection setup, cleanup */
#define QEDF_LOG_EVT 0x20 /* Events, link, mtu */
#define QEDF_LOG_TIMER 0x40 /* Timer events */
#define QEDF_LOG_MP_REQ 0x80 /* Middle Path (MP) logs */
#define QEDF_LOG_SCSI_TM 0x100 /* SCSI Aborts, Task Mgmt */
#define QEDF_LOG_UNSOL 0x200 /* unsolicited event logs */
#define QEDF_LOG_IO 0x400 /* scsi cmd, completion */
#define QEDF_LOG_MQ 0x800 /* Multi Queue logs */
#define QEDF_LOG_BSG 0x1000 /* BSG logs */
#define QEDF_LOG_DEBUGFS 0x2000 /* debugFS logs */
#define QEDF_LOG_LPORT 0x4000 /* lport logs */
#define QEDF_LOG_ELS 0x8000 /* ELS logs */
#define QEDF_LOG_NPIV 0x10000 /* NPIV logs */
#define QEDF_LOG_SESS 0x20000 /* Conection setup, cleanup */
#define QEDF_LOG_TID 0x80000 /*
* FW TID context acquire
* free
*/
#define QEDF_TRACK_TID 0x100000 /*
* Track TID state. To be
* enabled only at module load
* and not run-time.
*/
#define QEDF_TRACK_CMD_LIST 0x300000 /*
* Track active cmd list nodes,
* done with reference to TID,
* hence TRACK_TID also enabled.
*/
#define QEDF_LOG_NOTICE 0x40000000 /* Notice logs */
#define QEDF_LOG_WARN 0x80000000 /* Warning logs */
/* Debug context structure */
struct qedf_dbg_ctx {
unsigned int host_no;
struct pci_dev *pdev;
#ifdef CONFIG_DEBUG_FS
struct dentry *bdf_dentry;
#endif
};
#define QEDF_ERR(pdev, fmt, ...) \
qedf_dbg_err(pdev, __func__, __LINE__, fmt, ## __VA_ARGS__)
#define QEDF_WARN(pdev, fmt, ...) \
qedf_dbg_warn(pdev, __func__, __LINE__, fmt, ## __VA_ARGS__)
#define QEDF_NOTICE(pdev, fmt, ...) \
qedf_dbg_notice(pdev, __func__, __LINE__, fmt, ## __VA_ARGS__)
#define QEDF_INFO(pdev, level, fmt, ...) \
qedf_dbg_info(pdev, __func__, __LINE__, level, fmt, \
## __VA_ARGS__)
extern void qedf_dbg_err(struct qedf_dbg_ctx *qedf, const char *func, u32 line,
const char *fmt, ...);
extern void qedf_dbg_warn(struct qedf_dbg_ctx *qedf, const char *func, u32 line,
const char *, ...);
extern void qedf_dbg_notice(struct qedf_dbg_ctx *qedf, const char *func,
u32 line, const char *, ...);
extern void qedf_dbg_info(struct qedf_dbg_ctx *qedf, const char *func, u32 line,
u32 info, const char *fmt, ...);
/* GRC Dump related defines */
struct Scsi_Host;
#define QEDF_UEVENT_CODE_GRCDUMP 0
struct sysfs_bin_attrs {
char *name;
struct bin_attribute *attr;
};
extern int qedf_alloc_grc_dump_buf(uint8_t **buf, uint32_t len);
extern void qedf_free_grc_dump_buf(uint8_t **buf);
extern int qedf_get_grc_dump(struct qed_dev *cdev,
const struct qed_common_ops *common, uint8_t **buf,
uint32_t *grcsize);
extern void qedf_uevent_emit(struct Scsi_Host *shost, u32 code, char *msg);
extern int qedf_create_sysfs_attr(struct Scsi_Host *shost,
struct sysfs_bin_attrs *iter);
extern void qedf_remove_sysfs_attr(struct Scsi_Host *shost,
struct sysfs_bin_attrs *iter);
#ifdef CONFIG_DEBUG_FS
/* DebugFS related code */
struct qedf_list_of_funcs {
char *oper_str;
ssize_t (*oper_func)(struct qedf_dbg_ctx *qedf);
};
struct qedf_debugfs_ops {
char *name;
struct qedf_list_of_funcs *qedf_funcs;
};
#define qedf_dbg_fileops(drv, ops) \
{ \
.owner = THIS_MODULE, \
.open = simple_open, \
.read = drv##_dbg_##ops##_cmd_read, \
.write = drv##_dbg_##ops##_cmd_write \
}
/* Used for debugfs sequential files */
#define qedf_dbg_fileops_seq(drv, ops) \
{ \
.owner = THIS_MODULE, \
.open = drv##_dbg_##ops##_open, \
.read = seq_read, \
.llseek = seq_lseek, \
.release = single_release, \
}
extern void qedf_dbg_host_init(struct qedf_dbg_ctx *qedf,
struct qedf_debugfs_ops *dops,
struct file_operations *fops);
extern void qedf_dbg_host_exit(struct qedf_dbg_ctx *qedf);
extern void qedf_dbg_init(char *drv_name);
extern void qedf_dbg_exit(void);
#endif /* CONFIG_DEBUG_FS */
#endif /* _QEDF_DBG_H_ */

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/*
* QLogic FCoE Offload Driver
* Copyright (c) 2016 QLogic Corporation
*
* This software is available under the terms of the GNU General Public License
* (GPL) Version 2, available from the file COPYING in the main directory of
* this source tree.
*/
#ifdef CONFIG_DEBUG_FS
#include <linux/uaccess.h>
#include <linux/debugfs.h>
#include <linux/module.h>
#include "qedf.h"
#include "qedf_dbg.h"
static struct dentry *qedf_dbg_root;
/**
* qedf_dbg_host_init - setup the debugfs file for the pf
* @pf: the pf that is starting up
**/
void
qedf_dbg_host_init(struct qedf_dbg_ctx *qedf,
struct qedf_debugfs_ops *dops,
struct file_operations *fops)
{
char host_dirname[32];
struct dentry *file_dentry = NULL;
QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "Creating debugfs host node\n");
/* create pf dir */
sprintf(host_dirname, "host%u", qedf->host_no);
qedf->bdf_dentry = debugfs_create_dir(host_dirname, qedf_dbg_root);
if (!qedf->bdf_dentry)
return;
/* create debugfs files */
while (dops) {
if (!(dops->name))
break;
file_dentry = debugfs_create_file(dops->name, 0600,
qedf->bdf_dentry, qedf,
fops);
if (!file_dentry) {
QEDF_INFO(qedf, QEDF_LOG_DEBUGFS,
"Debugfs entry %s creation failed\n",
dops->name);
debugfs_remove_recursive(qedf->bdf_dentry);
return;
}
dops++;
fops++;
}
}
/**
* qedf_dbg_host_exit - clear out the pf's debugfs entries
* @pf: the pf that is stopping
**/
void
qedf_dbg_host_exit(struct qedf_dbg_ctx *qedf)
{
QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "Destroying debugfs host "
"entry\n");
/* remove debugfs entries of this PF */
debugfs_remove_recursive(qedf->bdf_dentry);
qedf->bdf_dentry = NULL;
}
/**
* qedf_dbg_init - start up debugfs for the driver
**/
void
qedf_dbg_init(char *drv_name)
{
QEDF_INFO(NULL, QEDF_LOG_DEBUGFS, "Creating debugfs root node\n");
/* create qed dir in root of debugfs. NULL means debugfs root */
qedf_dbg_root = debugfs_create_dir(drv_name, NULL);
if (!qedf_dbg_root)
QEDF_INFO(NULL, QEDF_LOG_DEBUGFS, "Init of debugfs "
"failed\n");
}
/**
* qedf_dbg_exit - clean out the driver's debugfs entries
**/
void
qedf_dbg_exit(void)
{
QEDF_INFO(NULL, QEDF_LOG_DEBUGFS, "Destroying debugfs root "
"entry\n");
/* remove qed dir in root of debugfs */
debugfs_remove_recursive(qedf_dbg_root);
qedf_dbg_root = NULL;
}
struct qedf_debugfs_ops qedf_debugfs_ops[] = {
{ "fp_int", NULL },
{ "io_trace", NULL },
{ "debug", NULL },
{ "stop_io_on_error", NULL},
{ "driver_stats", NULL},
{ "clear_stats", NULL},
{ "offload_stats", NULL},
/* This must be last */
{ NULL, NULL }
};
DECLARE_PER_CPU(struct qedf_percpu_iothread_s, qedf_percpu_iothreads);
static ssize_t
qedf_dbg_fp_int_cmd_read(struct file *filp, char __user *buffer, size_t count,
loff_t *ppos)
{
size_t cnt = 0;
int id;
struct qedf_fastpath *fp = NULL;
struct qedf_dbg_ctx *qedf_dbg =
(struct qedf_dbg_ctx *)filp->private_data;
struct qedf_ctx *qedf = container_of(qedf_dbg,
struct qedf_ctx, dbg_ctx);
QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");
cnt = sprintf(buffer, "\nFastpath I/O completions\n\n");
for (id = 0; id < qedf->num_queues; id++) {
fp = &(qedf->fp_array[id]);
if (fp->sb_id == QEDF_SB_ID_NULL)
continue;
cnt += sprintf((buffer + cnt), "#%d: %lu\n", id,
fp->completions);
}
cnt = min_t(int, count, cnt - *ppos);
*ppos += cnt;
return cnt;
}
static ssize_t
qedf_dbg_fp_int_cmd_write(struct file *filp, const char __user *buffer,
size_t count, loff_t *ppos)
{
if (!count || *ppos)
return 0;
return count;
}
static ssize_t
qedf_dbg_debug_cmd_read(struct file *filp, char __user *buffer, size_t count,
loff_t *ppos)
{
int cnt;
struct qedf_dbg_ctx *qedf =
(struct qedf_dbg_ctx *)filp->private_data;
QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "entered\n");
cnt = sprintf(buffer, "debug mask = 0x%x\n", qedf_debug);
cnt = min_t(int, count, cnt - *ppos);
*ppos += cnt;
return cnt;
}
static ssize_t
qedf_dbg_debug_cmd_write(struct file *filp, const char __user *buffer,
size_t count, loff_t *ppos)
{
uint32_t val;
void *kern_buf;
int rval;
struct qedf_dbg_ctx *qedf =
(struct qedf_dbg_ctx *)filp->private_data;
if (!count || *ppos)
return 0;
kern_buf = memdup_user(buffer, count);
if (IS_ERR(kern_buf))
return PTR_ERR(kern_buf);
rval = kstrtouint(kern_buf, 10, &val);
kfree(kern_buf);
if (rval)
return rval;
if (val == 1)
qedf_debug = QEDF_DEFAULT_LOG_MASK;
else
qedf_debug = val;
QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "Setting debug=0x%x.\n", val);
return count;
}
static ssize_t
qedf_dbg_stop_io_on_error_cmd_read(struct file *filp, char __user *buffer,
size_t count, loff_t *ppos)
{
int cnt;
struct qedf_dbg_ctx *qedf_dbg =
(struct qedf_dbg_ctx *)filp->private_data;
struct qedf_ctx *qedf = container_of(qedf_dbg,
struct qedf_ctx, dbg_ctx);
QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");
cnt = sprintf(buffer, "%s\n",
qedf->stop_io_on_error ? "true" : "false");
cnt = min_t(int, count, cnt - *ppos);
*ppos += cnt;
return cnt;
}
static ssize_t
qedf_dbg_stop_io_on_error_cmd_write(struct file *filp,
const char __user *buffer, size_t count,
loff_t *ppos)
{
void *kern_buf;
struct qedf_dbg_ctx *qedf_dbg =
(struct qedf_dbg_ctx *)filp->private_data;
struct qedf_ctx *qedf = container_of(qedf_dbg, struct qedf_ctx,
dbg_ctx);
QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");
if (!count || *ppos)
return 0;
kern_buf = memdup_user(buffer, 6);
if (IS_ERR(kern_buf))
return PTR_ERR(kern_buf);
if (strncmp(kern_buf, "false", 5) == 0)
qedf->stop_io_on_error = false;
else if (strncmp(kern_buf, "true", 4) == 0)
qedf->stop_io_on_error = true;
else if (strncmp(kern_buf, "now", 3) == 0)
/* Trigger from user to stop all I/O on this host */
set_bit(QEDF_DBG_STOP_IO, &qedf->flags);
kfree(kern_buf);
return count;
}
static int
qedf_io_trace_show(struct seq_file *s, void *unused)
{
int i, idx = 0;
struct qedf_ctx *qedf = s->private;
struct qedf_dbg_ctx *qedf_dbg = &qedf->dbg_ctx;
struct qedf_io_log *io_log;
unsigned long flags;
if (!qedf_io_tracing) {
seq_puts(s, "I/O tracing not enabled.\n");
goto out;
}
QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");
spin_lock_irqsave(&qedf->io_trace_lock, flags);
idx = qedf->io_trace_idx;
for (i = 0; i < QEDF_IO_TRACE_SIZE; i++) {
io_log = &qedf->io_trace_buf[idx];
seq_printf(s, "%d:", io_log->direction);
seq_printf(s, "0x%x:", io_log->task_id);
seq_printf(s, "0x%06x:", io_log->port_id);
seq_printf(s, "%d:", io_log->lun);
seq_printf(s, "0x%02x:", io_log->op);
seq_printf(s, "0x%02x%02x%02x%02x:", io_log->lba[0],
io_log->lba[1], io_log->lba[2], io_log->lba[3]);
seq_printf(s, "%d:", io_log->bufflen);
seq_printf(s, "%d:", io_log->sg_count);
seq_printf(s, "0x%08x:", io_log->result);
seq_printf(s, "%lu:", io_log->jiffies);
seq_printf(s, "%d:", io_log->refcount);
seq_printf(s, "%d:", io_log->req_cpu);
seq_printf(s, "%d:", io_log->int_cpu);
seq_printf(s, "%d:", io_log->rsp_cpu);
seq_printf(s, "%d\n", io_log->sge_type);
idx++;
if (idx == QEDF_IO_TRACE_SIZE)
idx = 0;
}
spin_unlock_irqrestore(&qedf->io_trace_lock, flags);
out:
return 0;
}
static int
qedf_dbg_io_trace_open(struct inode *inode, struct file *file)
{
struct qedf_dbg_ctx *qedf_dbg = inode->i_private;
struct qedf_ctx *qedf = container_of(qedf_dbg,
struct qedf_ctx, dbg_ctx);
return single_open(file, qedf_io_trace_show, qedf);
}
static int
qedf_driver_stats_show(struct seq_file *s, void *unused)
{
struct qedf_ctx *qedf = s->private;
struct qedf_rport *fcport;
struct fc_rport_priv *rdata;
seq_printf(s, "cmg_mgr free io_reqs: %d\n",
atomic_read(&qedf->cmd_mgr->free_list_cnt));
seq_printf(s, "slow SGEs: %d\n", qedf->slow_sge_ios);
seq_printf(s, "single SGEs: %d\n", qedf->single_sge_ios);
seq_printf(s, "fast SGEs: %d\n\n", qedf->fast_sge_ios);
seq_puts(s, "Offloaded ports:\n\n");
rcu_read_lock();
list_for_each_entry_rcu(fcport, &qedf->fcports, peers) {
rdata = fcport->rdata;
if (rdata == NULL)
continue;
seq_printf(s, "%06x: free_sqes: %d, num_active_ios: %d\n",
rdata->ids.port_id, atomic_read(&fcport->free_sqes),
atomic_read(&fcport->num_active_ios));
}
rcu_read_unlock();
return 0;
}
static int
qedf_dbg_driver_stats_open(struct inode *inode, struct file *file)
{
struct qedf_dbg_ctx *qedf_dbg = inode->i_private;
struct qedf_ctx *qedf = container_of(qedf_dbg,
struct qedf_ctx, dbg_ctx);
return single_open(file, qedf_driver_stats_show, qedf);
}
static ssize_t
qedf_dbg_clear_stats_cmd_read(struct file *filp, char __user *buffer,
size_t count, loff_t *ppos)
{
int cnt = 0;
/* Essentially a read stub */
cnt = min_t(int, count, cnt - *ppos);
*ppos += cnt;
return cnt;
}
static ssize_t
qedf_dbg_clear_stats_cmd_write(struct file *filp,
const char __user *buffer, size_t count,
loff_t *ppos)
{
struct qedf_dbg_ctx *qedf_dbg =
(struct qedf_dbg_ctx *)filp->private_data;
struct qedf_ctx *qedf = container_of(qedf_dbg, struct qedf_ctx,
dbg_ctx);
QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "Clearing stat counters.\n");
if (!count || *ppos)
return 0;
/* Clear stat counters exposed by 'stats' node */
qedf->slow_sge_ios = 0;
qedf->single_sge_ios = 0;
qedf->fast_sge_ios = 0;
return count;
}
static int
qedf_offload_stats_show(struct seq_file *s, void *unused)
{
struct qedf_ctx *qedf = s->private;
struct qed_fcoe_stats *fw_fcoe_stats;
fw_fcoe_stats = kmalloc(sizeof(struct qed_fcoe_stats), GFP_KERNEL);
if (!fw_fcoe_stats) {
QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate memory for "
"fw_fcoe_stats.\n");
goto out;
}
/* Query firmware for offload stats */
qed_ops->get_stats(qedf->cdev, fw_fcoe_stats);
seq_printf(s, "fcoe_rx_byte_cnt=%llu\n"
"fcoe_rx_data_pkt_cnt=%llu\n"
"fcoe_rx_xfer_pkt_cnt=%llu\n"
"fcoe_rx_other_pkt_cnt=%llu\n"
"fcoe_silent_drop_pkt_cmdq_full_cnt=%u\n"
"fcoe_silent_drop_pkt_crc_error_cnt=%u\n"
"fcoe_silent_drop_pkt_task_invalid_cnt=%u\n"
"fcoe_silent_drop_total_pkt_cnt=%u\n"
"fcoe_silent_drop_pkt_rq_full_cnt=%u\n"
"fcoe_tx_byte_cnt=%llu\n"
"fcoe_tx_data_pkt_cnt=%llu\n"
"fcoe_tx_xfer_pkt_cnt=%llu\n"
"fcoe_tx_other_pkt_cnt=%llu\n",
fw_fcoe_stats->fcoe_rx_byte_cnt,
fw_fcoe_stats->fcoe_rx_data_pkt_cnt,
fw_fcoe_stats->fcoe_rx_xfer_pkt_cnt,
fw_fcoe_stats->fcoe_rx_other_pkt_cnt,
fw_fcoe_stats->fcoe_silent_drop_pkt_cmdq_full_cnt,
fw_fcoe_stats->fcoe_silent_drop_pkt_crc_error_cnt,
fw_fcoe_stats->fcoe_silent_drop_pkt_task_invalid_cnt,
fw_fcoe_stats->fcoe_silent_drop_total_pkt_cnt,
fw_fcoe_stats->fcoe_silent_drop_pkt_rq_full_cnt,
fw_fcoe_stats->fcoe_tx_byte_cnt,
fw_fcoe_stats->fcoe_tx_data_pkt_cnt,
fw_fcoe_stats->fcoe_tx_xfer_pkt_cnt,
fw_fcoe_stats->fcoe_tx_other_pkt_cnt);
kfree(fw_fcoe_stats);
out:
return 0;
}
static int
qedf_dbg_offload_stats_open(struct inode *inode, struct file *file)
{
struct qedf_dbg_ctx *qedf_dbg = inode->i_private;
struct qedf_ctx *qedf = container_of(qedf_dbg,
struct qedf_ctx, dbg_ctx);
return single_open(file, qedf_offload_stats_show, qedf);
}
const struct file_operations qedf_dbg_fops[] = {
qedf_dbg_fileops(qedf, fp_int),
qedf_dbg_fileops_seq(qedf, io_trace),
qedf_dbg_fileops(qedf, debug),
qedf_dbg_fileops(qedf, stop_io_on_error),
qedf_dbg_fileops_seq(qedf, driver_stats),
qedf_dbg_fileops(qedf, clear_stats),
qedf_dbg_fileops_seq(qedf, offload_stats),
/* This must be last */
{ NULL, NULL },
};
#else /* CONFIG_DEBUG_FS */
void qedf_dbg_host_init(struct qedf_dbg_ctx *);
void qedf_dbg_host_exit(struct qedf_dbg_ctx *);
void qedf_dbg_init(char *);
void qedf_dbg_exit(void);
#endif /* CONFIG_DEBUG_FS */

949
drivers/scsi/qedf/qedf_els.c Normal file
View File

@ -0,0 +1,949 @@
/*
* QLogic FCoE Offload Driver
* Copyright (c) 2016 Cavium Inc.
*
* This software is available under the terms of the GNU General Public License
* (GPL) Version 2, available from the file COPYING in the main directory of
* this source tree.
*/
#include "qedf.h"
/* It's assumed that the lock is held when calling this function. */
static int qedf_initiate_els(struct qedf_rport *fcport, unsigned int op,
void *data, uint32_t data_len,
void (*cb_func)(struct qedf_els_cb_arg *cb_arg),
struct qedf_els_cb_arg *cb_arg, uint32_t timer_msec)
{
struct qedf_ctx *qedf = fcport->qedf;
struct fc_lport *lport = qedf->lport;
struct qedf_ioreq *els_req;
struct qedf_mp_req *mp_req;
struct fc_frame_header *fc_hdr;
struct fcoe_task_context *task;
int rc = 0;
uint32_t did, sid;
uint16_t xid;
uint32_t start_time = jiffies / HZ;
uint32_t current_time;
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "Sending ELS\n");
rc = fc_remote_port_chkready(fcport->rport);
if (rc) {
QEDF_ERR(&(qedf->dbg_ctx), "els 0x%x: rport not ready\n", op);
rc = -EAGAIN;
goto els_err;
}
if (lport->state != LPORT_ST_READY || !(lport->link_up)) {
QEDF_ERR(&(qedf->dbg_ctx), "els 0x%x: link is not ready\n",
op);
rc = -EAGAIN;
goto els_err;
}
if (!(test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags))) {
QEDF_ERR(&(qedf->dbg_ctx), "els 0x%x: fcport not ready\n", op);
rc = -EINVAL;
goto els_err;
}
retry_els:
els_req = qedf_alloc_cmd(fcport, QEDF_ELS);
if (!els_req) {
current_time = jiffies / HZ;
if ((current_time - start_time) > 10) {
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
"els: Failed els 0x%x\n", op);
rc = -ENOMEM;
goto els_err;
}
mdelay(20 * USEC_PER_MSEC);
goto retry_els;
}
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "initiate_els els_req = "
"0x%p cb_arg = %p xid = %x\n", els_req, cb_arg,
els_req->xid);
els_req->sc_cmd = NULL;
els_req->cmd_type = QEDF_ELS;
els_req->fcport = fcport;
els_req->cb_func = cb_func;
cb_arg->io_req = els_req;
cb_arg->op = op;
els_req->cb_arg = cb_arg;
els_req->data_xfer_len = data_len;
/* Record which cpu this request is associated with */
els_req->cpu = smp_processor_id();
mp_req = (struct qedf_mp_req *)&(els_req->mp_req);
rc = qedf_init_mp_req(els_req);
if (rc) {
QEDF_ERR(&(qedf->dbg_ctx), "ELS MP request init failed\n");
kref_put(&els_req->refcount, qedf_release_cmd);
goto els_err;
} else {
rc = 0;
}
/* Fill ELS Payload */
if ((op >= ELS_LS_RJT) && (op <= ELS_AUTH_ELS)) {
memcpy(mp_req->req_buf, data, data_len);
} else {
QEDF_ERR(&(qedf->dbg_ctx), "Invalid ELS op 0x%x\n", op);
els_req->cb_func = NULL;
els_req->cb_arg = NULL;
kref_put(&els_req->refcount, qedf_release_cmd);
rc = -EINVAL;
}
if (rc)
goto els_err;
/* Fill FC header */
fc_hdr = &(mp_req->req_fc_hdr);
did = fcport->rdata->ids.port_id;
sid = fcport->sid;
__fc_fill_fc_hdr(fc_hdr, FC_RCTL_ELS_REQ, sid, did,
FC_TYPE_ELS, FC_FC_FIRST_SEQ | FC_FC_END_SEQ |
FC_FC_SEQ_INIT, 0);
/* Obtain exchange id */
xid = els_req->xid;
/* Initialize task context for this IO request */
task = qedf_get_task_mem(&qedf->tasks, xid);
qedf_init_mp_task(els_req, task);
/* Put timer on original I/O request */
if (timer_msec)
qedf_cmd_timer_set(qedf, els_req, timer_msec);
qedf_add_to_sq(fcport, xid, 0, FCOE_TASK_TYPE_MIDPATH, 0);
/* Ring doorbell */
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "Ringing doorbell for ELS "
"req\n");
qedf_ring_doorbell(fcport);
els_err:
return rc;
}
void qedf_process_els_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe,
struct qedf_ioreq *els_req)
{
struct fcoe_task_context *task_ctx;
struct scsi_cmnd *sc_cmd;
uint16_t xid;
struct fcoe_cqe_midpath_info *mp_info;
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "Entered with xid = 0x%x"
" cmd_type = %d.\n", els_req->xid, els_req->cmd_type);
/* Kill the ELS timer */
cancel_delayed_work(&els_req->timeout_work);
xid = els_req->xid;
task_ctx = qedf_get_task_mem(&qedf->tasks, xid);
sc_cmd = els_req->sc_cmd;
/* Get ELS response length from CQE */
mp_info = &cqe->cqe_info.midpath_info;
els_req->mp_req.resp_len = mp_info->data_placement_size;
/* Parse ELS response */
if ((els_req->cb_func) && (els_req->cb_arg)) {
els_req->cb_func(els_req->cb_arg);
els_req->cb_arg = NULL;
}
kref_put(&els_req->refcount, qedf_release_cmd);
}
static void qedf_rrq_compl(struct qedf_els_cb_arg *cb_arg)
{
struct qedf_ioreq *orig_io_req;
struct qedf_ioreq *rrq_req;
struct qedf_ctx *qedf;
int refcount;
rrq_req = cb_arg->io_req;
qedf = rrq_req->fcport->qedf;
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "Entered.\n");
orig_io_req = cb_arg->aborted_io_req;
if (!orig_io_req)
goto out_free;
if (rrq_req->event != QEDF_IOREQ_EV_ELS_TMO &&
rrq_req->event != QEDF_IOREQ_EV_ELS_ERR_DETECT)
cancel_delayed_work_sync(&orig_io_req->timeout_work);
refcount = atomic_read(&orig_io_req->refcount.refcount);
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "rrq_compl: orig io = %p,"
" orig xid = 0x%x, rrq_xid = 0x%x, refcount=%d\n",
orig_io_req, orig_io_req->xid, rrq_req->xid, refcount);
/* This should return the aborted io_req to the command pool */
if (orig_io_req)
kref_put(&orig_io_req->refcount, qedf_release_cmd);
out_free:
kfree(cb_arg);
}
/* Assumes kref is already held by caller */
int qedf_send_rrq(struct qedf_ioreq *aborted_io_req)
{
struct fc_els_rrq rrq;
struct qedf_rport *fcport;
struct fc_lport *lport;
struct qedf_els_cb_arg *cb_arg = NULL;
struct qedf_ctx *qedf;
uint32_t sid;
uint32_t r_a_tov;
int rc;
if (!aborted_io_req) {
QEDF_ERR(NULL, "abort_io_req is NULL.\n");
return -EINVAL;
}
fcport = aborted_io_req->fcport;
/* Check that fcport is still offloaded */
if (!(test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags))) {
QEDF_ERR(NULL, "fcport is no longer offloaded.\n");
return -EINVAL;
}
if (!fcport->qedf) {
QEDF_ERR(NULL, "fcport->qedf is NULL.\n");
return -EINVAL;
}
qedf = fcport->qedf;
lport = qedf->lport;
sid = fcport->sid;
r_a_tov = lport->r_a_tov;
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "Sending RRQ orig "
"io = %p, orig_xid = 0x%x\n", aborted_io_req,
aborted_io_req->xid);
memset(&rrq, 0, sizeof(rrq));
cb_arg = kzalloc(sizeof(struct qedf_els_cb_arg), GFP_NOIO);
if (!cb_arg) {
QEDF_ERR(&(qedf->dbg_ctx), "Unable to allocate cb_arg for "
"RRQ\n");
rc = -ENOMEM;
goto rrq_err;
}
cb_arg->aborted_io_req = aborted_io_req;
rrq.rrq_cmd = ELS_RRQ;
hton24(rrq.rrq_s_id, sid);
rrq.rrq_ox_id = htons(aborted_io_req->xid);
rrq.rrq_rx_id =
htons(aborted_io_req->task->tstorm_st_context.read_write.rx_id);
rc = qedf_initiate_els(fcport, ELS_RRQ, &rrq, sizeof(rrq),
qedf_rrq_compl, cb_arg, r_a_tov);
rrq_err:
if (rc) {
QEDF_ERR(&(qedf->dbg_ctx), "RRQ failed - release orig io "
"req 0x%x\n", aborted_io_req->xid);
kfree(cb_arg);
kref_put(&aborted_io_req->refcount, qedf_release_cmd);
}
return rc;
}
static void qedf_process_l2_frame_compl(struct qedf_rport *fcport,
struct fc_frame *fp,
u16 l2_oxid)
{
struct fc_lport *lport = fcport->qedf->lport;
struct fc_frame_header *fh;
u32 crc;
fh = (struct fc_frame_header *)fc_frame_header_get(fp);
/* Set the OXID we return to what libfc used */
if (l2_oxid != FC_XID_UNKNOWN)
fh->fh_ox_id = htons(l2_oxid);
/* Setup header fields */
fh->fh_r_ctl = FC_RCTL_ELS_REP;
fh->fh_type = FC_TYPE_ELS;
/* Last sequence, end sequence */
fh->fh_f_ctl[0] = 0x98;
hton24(fh->fh_d_id, lport->port_id);
hton24(fh->fh_s_id, fcport->rdata->ids.port_id);
fh->fh_rx_id = 0xffff;
/* Set frame attributes */
crc = fcoe_fc_crc(fp);
fc_frame_init(fp);
fr_dev(fp) = lport;
fr_sof(fp) = FC_SOF_I3;
fr_eof(fp) = FC_EOF_T;
fr_crc(fp) = cpu_to_le32(~crc);
/* Send completed request to libfc */
fc_exch_recv(lport, fp);
}
/*
* In instances where an ELS command times out we may need to restart the
* rport by logging out and then logging back in.
*/
void qedf_restart_rport(struct qedf_rport *fcport)
{
struct fc_lport *lport;
struct fc_rport_priv *rdata;
u32 port_id;
if (!fcport)
return;
rdata = fcport->rdata;
if (rdata) {
lport = fcport->qedf->lport;
port_id = rdata->ids.port_id;
QEDF_ERR(&(fcport->qedf->dbg_ctx),
"LOGO port_id=%x.\n", port_id);
fc_rport_logoff(rdata);
/* Recreate the rport and log back in */
rdata = fc_rport_create(lport, port_id);
if (rdata)
fc_rport_login(rdata);
}
}
static void qedf_l2_els_compl(struct qedf_els_cb_arg *cb_arg)
{
struct qedf_ioreq *els_req;
struct qedf_rport *fcport;
struct qedf_mp_req *mp_req;
struct fc_frame *fp;
struct fc_frame_header *fh, *mp_fc_hdr;
void *resp_buf, *fc_payload;
u32 resp_len;
u16 l2_oxid;
l2_oxid = cb_arg->l2_oxid;
els_req = cb_arg->io_req;
if (!els_req) {
QEDF_ERR(NULL, "els_req is NULL.\n");
goto free_arg;
}
/*
* If we are flushing the command just free the cb_arg as none of the
* response data will be valid.
*/
if (els_req->event == QEDF_IOREQ_EV_ELS_FLUSH)
goto free_arg;
fcport = els_req->fcport;
mp_req = &(els_req->mp_req);
mp_fc_hdr = &(mp_req->resp_fc_hdr);
resp_len = mp_req->resp_len;
resp_buf = mp_req->resp_buf;
/*
* If a middle path ELS command times out, don't try to return
* the command but rather do any internal cleanup and then libfc
* timeout the command and clean up its internal resources.
*/
if (els_req->event == QEDF_IOREQ_EV_ELS_TMO) {
/*
* If ADISC times out, libfc will timeout the exchange and then
* try to send a PLOGI which will timeout since the session is
* still offloaded. Force libfc to logout the session which
* will offload the connection and allow the PLOGI response to
* flow over the LL2 path.
*/
if (cb_arg->op == ELS_ADISC)
qedf_restart_rport(fcport);
return;
}
if (sizeof(struct fc_frame_header) + resp_len > QEDF_PAGE_SIZE) {
QEDF_ERR(&(fcport->qedf->dbg_ctx), "resp_len is "
"beyond page size.\n");
goto free_arg;
}
fp = fc_frame_alloc(fcport->qedf->lport, resp_len);
if (!fp) {
QEDF_ERR(&(fcport->qedf->dbg_ctx),
"fc_frame_alloc failure.\n");
return;
}
/* Copy frame header from firmware into fp */
fh = (struct fc_frame_header *)fc_frame_header_get(fp);
memcpy(fh, mp_fc_hdr, sizeof(struct fc_frame_header));
/* Copy payload from firmware into fp */
fc_payload = fc_frame_payload_get(fp, resp_len);
memcpy(fc_payload, resp_buf, resp_len);
QEDF_INFO(&(fcport->qedf->dbg_ctx), QEDF_LOG_ELS,
"Completing OX_ID 0x%x back to libfc.\n", l2_oxid);
qedf_process_l2_frame_compl(fcport, fp, l2_oxid);
free_arg:
kfree(cb_arg);
}
int qedf_send_adisc(struct qedf_rport *fcport, struct fc_frame *fp)
{
struct fc_els_adisc *adisc;
struct fc_frame_header *fh;
struct fc_lport *lport = fcport->qedf->lport;
struct qedf_els_cb_arg *cb_arg = NULL;
struct qedf_ctx *qedf;
uint32_t r_a_tov = lport->r_a_tov;
int rc;
qedf = fcport->qedf;
fh = fc_frame_header_get(fp);
cb_arg = kzalloc(sizeof(struct qedf_els_cb_arg), GFP_NOIO);
if (!cb_arg) {
QEDF_ERR(&(qedf->dbg_ctx), "Unable to allocate cb_arg for "
"ADISC\n");
rc = -ENOMEM;
goto adisc_err;
}
cb_arg->l2_oxid = ntohs(fh->fh_ox_id);
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
"Sending ADISC ox_id=0x%x.\n", cb_arg->l2_oxid);
adisc = fc_frame_payload_get(fp, sizeof(*adisc));
rc = qedf_initiate_els(fcport, ELS_ADISC, adisc, sizeof(*adisc),
qedf_l2_els_compl, cb_arg, r_a_tov);
adisc_err:
if (rc) {
QEDF_ERR(&(qedf->dbg_ctx), "ADISC failed.\n");
kfree(cb_arg);
}
return rc;
}
static void qedf_srr_compl(struct qedf_els_cb_arg *cb_arg)
{
struct qedf_ioreq *orig_io_req;
struct qedf_ioreq *srr_req;
struct qedf_mp_req *mp_req;
struct fc_frame_header *mp_fc_hdr, *fh;
struct fc_frame *fp;
void *resp_buf, *fc_payload;
u32 resp_len;
struct fc_lport *lport;
struct qedf_ctx *qedf;
int refcount;
u8 opcode;
srr_req = cb_arg->io_req;
qedf = srr_req->fcport->qedf;
lport = qedf->lport;
orig_io_req = cb_arg->aborted_io_req;
if (!orig_io_req)
goto out_free;
clear_bit(QEDF_CMD_SRR_SENT, &orig_io_req->flags);
if (srr_req->event != QEDF_IOREQ_EV_ELS_TMO &&
srr_req->event != QEDF_IOREQ_EV_ELS_ERR_DETECT)
cancel_delayed_work_sync(&orig_io_req->timeout_work);
refcount = atomic_read(&orig_io_req->refcount.refcount);
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "Entered: orig_io=%p,"
" orig_io_xid=0x%x, rec_xid=0x%x, refcount=%d\n",
orig_io_req, orig_io_req->xid, srr_req->xid, refcount);
/* If a SRR times out, simply free resources */
if (srr_req->event == QEDF_IOREQ_EV_ELS_TMO)
goto out_free;
/* Normalize response data into struct fc_frame */
mp_req = &(srr_req->mp_req);
mp_fc_hdr = &(mp_req->resp_fc_hdr);
resp_len = mp_req->resp_len;
resp_buf = mp_req->resp_buf;
fp = fc_frame_alloc(lport, resp_len);
if (!fp) {
QEDF_ERR(&(qedf->dbg_ctx),
"fc_frame_alloc failure.\n");
goto out_free;
}
/* Copy frame header from firmware into fp */
fh = (struct fc_frame_header *)fc_frame_header_get(fp);
memcpy(fh, mp_fc_hdr, sizeof(struct fc_frame_header));
/* Copy payload from firmware into fp */
fc_payload = fc_frame_payload_get(fp, resp_len);
memcpy(fc_payload, resp_buf, resp_len);
opcode = fc_frame_payload_op(fp);
switch (opcode) {
case ELS_LS_ACC:
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
"SRR success.\n");
break;
case ELS_LS_RJT:
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_ELS,
"SRR rejected.\n");
qedf_initiate_abts(orig_io_req, true);
break;
}
fc_frame_free(fp);
out_free:
/* Put reference for original command since SRR completed */
kref_put(&orig_io_req->refcount, qedf_release_cmd);
kfree(cb_arg);
}
static int qedf_send_srr(struct qedf_ioreq *orig_io_req, u32 offset, u8 r_ctl)
{
struct fcp_srr srr;
struct qedf_ctx *qedf;
struct qedf_rport *fcport;
struct fc_lport *lport;
struct qedf_els_cb_arg *cb_arg = NULL;
u32 sid, r_a_tov;
int rc;
if (!orig_io_req) {
QEDF_ERR(NULL, "orig_io_req is NULL.\n");
return -EINVAL;
}
fcport = orig_io_req->fcport;
/* Check that fcport is still offloaded */
if (!(test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags))) {
QEDF_ERR(NULL, "fcport is no longer offloaded.\n");
return -EINVAL;
}
if (!fcport->qedf) {
QEDF_ERR(NULL, "fcport->qedf is NULL.\n");
return -EINVAL;
}
/* Take reference until SRR command completion */
kref_get(&orig_io_req->refcount);
qedf = fcport->qedf;
lport = qedf->lport;
sid = fcport->sid;
r_a_tov = lport->r_a_tov;
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "Sending SRR orig_io=%p, "
"orig_xid=0x%x\n", orig_io_req, orig_io_req->xid);
memset(&srr, 0, sizeof(srr));
cb_arg = kzalloc(sizeof(struct qedf_els_cb_arg), GFP_NOIO);
if (!cb_arg) {
QEDF_ERR(&(qedf->dbg_ctx), "Unable to allocate cb_arg for "
"SRR\n");
rc = -ENOMEM;
goto srr_err;
}
cb_arg->aborted_io_req = orig_io_req;
srr.srr_op = ELS_SRR;
srr.srr_ox_id = htons(orig_io_req->xid);
srr.srr_rx_id = htons(orig_io_req->rx_id);
srr.srr_rel_off = htonl(offset);
srr.srr_r_ctl = r_ctl;
rc = qedf_initiate_els(fcport, ELS_SRR, &srr, sizeof(srr),
qedf_srr_compl, cb_arg, r_a_tov);
srr_err:
if (rc) {
QEDF_ERR(&(qedf->dbg_ctx), "SRR failed - release orig_io_req"
"=0x%x\n", orig_io_req->xid);
kfree(cb_arg);
/* If we fail to queue SRR, send ABTS to orig_io */
qedf_initiate_abts(orig_io_req, true);
kref_put(&orig_io_req->refcount, qedf_release_cmd);
} else
/* Tell other threads that SRR is in progress */
set_bit(QEDF_CMD_SRR_SENT, &orig_io_req->flags);
return rc;
}
static void qedf_initiate_seq_cleanup(struct qedf_ioreq *orig_io_req,
u32 offset, u8 r_ctl)
{
struct qedf_rport *fcport;
unsigned long flags;
struct qedf_els_cb_arg *cb_arg;
fcport = orig_io_req->fcport;
QEDF_INFO(&(fcport->qedf->dbg_ctx), QEDF_LOG_ELS,
"Doing sequence cleanup for xid=0x%x offset=%u.\n",
orig_io_req->xid, offset);
cb_arg = kzalloc(sizeof(struct qedf_els_cb_arg), GFP_NOIO);
if (!cb_arg) {
QEDF_ERR(&(fcport->qedf->dbg_ctx), "Unable to allocate cb_arg "
"for sequence cleanup\n");
return;
}
/* Get reference for cleanup request */
kref_get(&orig_io_req->refcount);
orig_io_req->cmd_type = QEDF_SEQ_CLEANUP;
cb_arg->offset = offset;
cb_arg->r_ctl = r_ctl;
orig_io_req->cb_arg = cb_arg;
qedf_cmd_timer_set(fcport->qedf, orig_io_req,
QEDF_CLEANUP_TIMEOUT * HZ);
spin_lock_irqsave(&fcport->rport_lock, flags);
qedf_add_to_sq(fcport, orig_io_req->xid, 0,
FCOE_TASK_TYPE_SEQUENCE_CLEANUP, offset);
qedf_ring_doorbell(fcport);
spin_unlock_irqrestore(&fcport->rport_lock, flags);
}
void qedf_process_seq_cleanup_compl(struct qedf_ctx *qedf,
struct fcoe_cqe *cqe, struct qedf_ioreq *io_req)
{
int rc;
struct qedf_els_cb_arg *cb_arg;
cb_arg = io_req->cb_arg;
/* If we timed out just free resources */
if (io_req->event == QEDF_IOREQ_EV_ELS_TMO || !cqe)
goto free;
/* Kill the timer we put on the request */
cancel_delayed_work_sync(&io_req->timeout_work);
rc = qedf_send_srr(io_req, cb_arg->offset, cb_arg->r_ctl);
if (rc)
QEDF_ERR(&(qedf->dbg_ctx), "Unable to send SRR, I/O will "
"abort, xid=0x%x.\n", io_req->xid);
free:
kfree(cb_arg);
kref_put(&io_req->refcount, qedf_release_cmd);
}
static bool qedf_requeue_io_req(struct qedf_ioreq *orig_io_req)
{
struct qedf_rport *fcport;
struct qedf_ioreq *new_io_req;
unsigned long flags;
bool rc = false;
fcport = orig_io_req->fcport;
if (!fcport) {
QEDF_ERR(NULL, "fcport is NULL.\n");
goto out;
}
if (!orig_io_req->sc_cmd) {
QEDF_ERR(&(fcport->qedf->dbg_ctx), "sc_cmd is NULL for "
"xid=0x%x.\n", orig_io_req->xid);
goto out;
}
new_io_req = qedf_alloc_cmd(fcport, QEDF_SCSI_CMD);
if (!new_io_req) {
QEDF_ERR(&(fcport->qedf->dbg_ctx), "Could not allocate new "
"io_req.\n");
goto out;
}
new_io_req->sc_cmd = orig_io_req->sc_cmd;
/*
* This keeps the sc_cmd struct from being returned to the tape
* driver and being requeued twice. We do need to put a reference
* for the original I/O request since we will not do a SCSI completion
* for it.
*/
orig_io_req->sc_cmd = NULL;
kref_put(&orig_io_req->refcount, qedf_release_cmd);
spin_lock_irqsave(&fcport->rport_lock, flags);
/* kref for new command released in qedf_post_io_req on error */
if (qedf_post_io_req(fcport, new_io_req)) {
QEDF_ERR(&(fcport->qedf->dbg_ctx), "Unable to post io_req\n");
/* Return SQE to pool */
atomic_inc(&fcport->free_sqes);
} else {
QEDF_INFO(&(fcport->qedf->dbg_ctx), QEDF_LOG_ELS,
"Reissued SCSI command from orig_xid=0x%x on "
"new_xid=0x%x.\n", orig_io_req->xid, new_io_req->xid);
/*
* Abort the original I/O but do not return SCSI command as
* it has been reissued on another OX_ID.
*/
spin_unlock_irqrestore(&fcport->rport_lock, flags);
qedf_initiate_abts(orig_io_req, false);
goto out;
}
spin_unlock_irqrestore(&fcport->rport_lock, flags);
out:
return rc;
}
static void qedf_rec_compl(struct qedf_els_cb_arg *cb_arg)
{
struct qedf_ioreq *orig_io_req;
struct qedf_ioreq *rec_req;
struct qedf_mp_req *mp_req;
struct fc_frame_header *mp_fc_hdr, *fh;
struct fc_frame *fp;
void *resp_buf, *fc_payload;
u32 resp_len;
struct fc_lport *lport;
struct qedf_ctx *qedf;
int refcount;
enum fc_rctl r_ctl;
struct fc_els_ls_rjt *rjt;
struct fc_els_rec_acc *acc;
u8 opcode;
u32 offset, e_stat;
struct scsi_cmnd *sc_cmd;
bool srr_needed = false;
rec_req = cb_arg->io_req;
qedf = rec_req->fcport->qedf;
lport = qedf->lport;
orig_io_req = cb_arg->aborted_io_req;
if (!orig_io_req)
goto out_free;
if (rec_req->event != QEDF_IOREQ_EV_ELS_TMO &&
rec_req->event != QEDF_IOREQ_EV_ELS_ERR_DETECT)
cancel_delayed_work_sync(&orig_io_req->timeout_work);
refcount = atomic_read(&orig_io_req->refcount.refcount);
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "Entered: orig_io=%p,"
" orig_io_xid=0x%x, rec_xid=0x%x, refcount=%d\n",
orig_io_req, orig_io_req->xid, rec_req->xid, refcount);
/* If a REC times out, free resources */
if (rec_req->event == QEDF_IOREQ_EV_ELS_TMO)
goto out_free;
/* Normalize response data into struct fc_frame */
mp_req = &(rec_req->mp_req);
mp_fc_hdr = &(mp_req->resp_fc_hdr);
resp_len = mp_req->resp_len;
acc = resp_buf = mp_req->resp_buf;
fp = fc_frame_alloc(lport, resp_len);
if (!fp) {
QEDF_ERR(&(qedf->dbg_ctx),
"fc_frame_alloc failure.\n");
goto out_free;
}
/* Copy frame header from firmware into fp */
fh = (struct fc_frame_header *)fc_frame_header_get(fp);
memcpy(fh, mp_fc_hdr, sizeof(struct fc_frame_header));
/* Copy payload from firmware into fp */
fc_payload = fc_frame_payload_get(fp, resp_len);
memcpy(fc_payload, resp_buf, resp_len);
opcode = fc_frame_payload_op(fp);
if (opcode == ELS_LS_RJT) {
rjt = fc_frame_payload_get(fp, sizeof(*rjt));
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
"Received LS_RJT for REC: er_reason=0x%x, "
"er_explan=0x%x.\n", rjt->er_reason, rjt->er_explan);
/*
* The following response(s) mean that we need to reissue the
* request on another exchange. We need to do this without
* informing the upper layers lest it cause an application
* error.
*/
if ((rjt->er_reason == ELS_RJT_LOGIC ||
rjt->er_reason == ELS_RJT_UNAB) &&
rjt->er_explan == ELS_EXPL_OXID_RXID) {
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
"Handle CMD LOST case.\n");
qedf_requeue_io_req(orig_io_req);
}
} else if (opcode == ELS_LS_ACC) {
offset = ntohl(acc->reca_fc4value);
e_stat = ntohl(acc->reca_e_stat);
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
"Received LS_ACC for REC: offset=0x%x, e_stat=0x%x.\n",
offset, e_stat);
if (e_stat & ESB_ST_SEQ_INIT) {
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
"Target has the seq init\n");
goto out_free_frame;
}
sc_cmd = orig_io_req->sc_cmd;
if (!sc_cmd) {
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
"sc_cmd is NULL for xid=0x%x.\n",
orig_io_req->xid);
goto out_free_frame;
}
/* SCSI write case */
if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) {
if (offset == orig_io_req->data_xfer_len) {
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
"WRITE - response lost.\n");
r_ctl = FC_RCTL_DD_CMD_STATUS;
srr_needed = true;
offset = 0;
} else {
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
"WRITE - XFER_RDY/DATA lost.\n");
r_ctl = FC_RCTL_DD_DATA_DESC;
/* Use data from warning CQE instead of REC */
offset = orig_io_req->tx_buf_off;
}
/* SCSI read case */
} else {
if (orig_io_req->rx_buf_off ==
orig_io_req->data_xfer_len) {
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
"READ - response lost.\n");
srr_needed = true;
r_ctl = FC_RCTL_DD_CMD_STATUS;
offset = 0;
} else {
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
"READ - DATA lost.\n");
/*
* For read case we always set the offset to 0
* for sequence recovery task.
*/
offset = 0;
r_ctl = FC_RCTL_DD_SOL_DATA;
}
}
if (srr_needed)
qedf_send_srr(orig_io_req, offset, r_ctl);
else
qedf_initiate_seq_cleanup(orig_io_req, offset, r_ctl);
}
out_free_frame:
fc_frame_free(fp);
out_free:
/* Put reference for original command since REC completed */
kref_put(&orig_io_req->refcount, qedf_release_cmd);
kfree(cb_arg);
}
/* Assumes kref is already held by caller */
int qedf_send_rec(struct qedf_ioreq *orig_io_req)
{
struct fc_els_rec rec;
struct qedf_rport *fcport;
struct fc_lport *lport;
struct qedf_els_cb_arg *cb_arg = NULL;
struct qedf_ctx *qedf;
uint32_t sid;
uint32_t r_a_tov;
int rc;
if (!orig_io_req) {
QEDF_ERR(NULL, "orig_io_req is NULL.\n");
return -EINVAL;
}
fcport = orig_io_req->fcport;
/* Check that fcport is still offloaded */
if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
QEDF_ERR(NULL, "fcport is no longer offloaded.\n");
return -EINVAL;
}
if (!fcport->qedf) {
QEDF_ERR(NULL, "fcport->qedf is NULL.\n");
return -EINVAL;
}
/* Take reference until REC command completion */
kref_get(&orig_io_req->refcount);
qedf = fcport->qedf;
lport = qedf->lport;
sid = fcport->sid;
r_a_tov = lport->r_a_tov;
memset(&rec, 0, sizeof(rec));
cb_arg = kzalloc(sizeof(struct qedf_els_cb_arg), GFP_NOIO);
if (!cb_arg) {
QEDF_ERR(&(qedf->dbg_ctx), "Unable to allocate cb_arg for "
"REC\n");
rc = -ENOMEM;
goto rec_err;
}
cb_arg->aborted_io_req = orig_io_req;
rec.rec_cmd = ELS_REC;
hton24(rec.rec_s_id, sid);
rec.rec_ox_id = htons(orig_io_req->xid);
rec.rec_rx_id =
htons(orig_io_req->task->tstorm_st_context.read_write.rx_id);
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "Sending REC orig_io=%p, "
"orig_xid=0x%x rx_id=0x%x\n", orig_io_req,
orig_io_req->xid, rec.rec_rx_id);
rc = qedf_initiate_els(fcport, ELS_REC, &rec, sizeof(rec),
qedf_rec_compl, cb_arg, r_a_tov);
rec_err:
if (rc) {
QEDF_ERR(&(qedf->dbg_ctx), "REC failed - release orig_io_req"
"=0x%x\n", orig_io_req->xid);
kfree(cb_arg);
kref_put(&orig_io_req->refcount, qedf_release_cmd);
}
return rc;
}

269
drivers/scsi/qedf/qedf_fip.c Normal file
View File

@ -0,0 +1,269 @@
/*
* QLogic FCoE Offload Driver
* Copyright (c) 2016 Cavium Inc.
*
* This software is available under the terms of the GNU General Public License
* (GPL) Version 2, available from the file COPYING in the main directory of
* this source tree.
*/
#include <linux/if_ether.h>
#include <linux/if_vlan.h>
#include "qedf.h"
extern const struct qed_fcoe_ops *qed_ops;
/*
* FIP VLAN functions that will eventually move to libfcoe.
*/
void qedf_fcoe_send_vlan_req(struct qedf_ctx *qedf)
{
struct sk_buff *skb;
char *eth_fr;
int fr_len;
struct fip_vlan *vlan;
#define MY_FIP_ALL_FCF_MACS ((__u8[6]) { 1, 0x10, 0x18, 1, 0, 2 })
static u8 my_fcoe_all_fcfs[ETH_ALEN] = MY_FIP_ALL_FCF_MACS;
skb = dev_alloc_skb(sizeof(struct fip_vlan));
if (!skb)
return;
fr_len = sizeof(*vlan);
eth_fr = (char *)skb->data;
vlan = (struct fip_vlan *)eth_fr;
memset(vlan, 0, sizeof(*vlan));
ether_addr_copy(vlan->eth.h_source, qedf->mac);
ether_addr_copy(vlan->eth.h_dest, my_fcoe_all_fcfs);
vlan->eth.h_proto = htons(ETH_P_FIP);
vlan->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
vlan->fip.fip_op = htons(FIP_OP_VLAN);
vlan->fip.fip_subcode = FIP_SC_VL_REQ;
vlan->fip.fip_dl_len = htons(sizeof(vlan->desc) / FIP_BPW);
vlan->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC;
vlan->desc.mac.fd_desc.fip_dlen = sizeof(vlan->desc.mac) / FIP_BPW;
ether_addr_copy(vlan->desc.mac.fd_mac, qedf->mac);
vlan->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME;
vlan->desc.wwnn.fd_desc.fip_dlen = sizeof(vlan->desc.wwnn) / FIP_BPW;
put_unaligned_be64(qedf->lport->wwnn, &vlan->desc.wwnn.fd_wwn);
skb_put(skb, sizeof(*vlan));
skb->protocol = htons(ETH_P_FIP);
skb_reset_mac_header(skb);
skb_reset_network_header(skb);
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "Sending FIP VLAN "
"request.");
if (atomic_read(&qedf->link_state) != QEDF_LINK_UP) {
QEDF_WARN(&(qedf->dbg_ctx), "Cannot send vlan request "
"because link is not up.\n");
kfree_skb(skb);
return;
}
qed_ops->ll2->start_xmit(qedf->cdev, skb);
}
static void qedf_fcoe_process_vlan_resp(struct qedf_ctx *qedf,
struct sk_buff *skb)
{
struct fip_header *fiph;
struct fip_desc *desc;
u16 vid = 0;
ssize_t rlen;
size_t dlen;
fiph = (struct fip_header *)(((void *)skb->data) + 2 * ETH_ALEN + 2);
rlen = ntohs(fiph->fip_dl_len) * 4;
desc = (struct fip_desc *)(fiph + 1);
while (rlen > 0) {
dlen = desc->fip_dlen * FIP_BPW;
switch (desc->fip_dtype) {
case FIP_DT_VLAN:
vid = ntohs(((struct fip_vlan_desc *)desc)->fd_vlan);
break;
}
desc = (struct fip_desc *)((char *)desc + dlen);
rlen -= dlen;
}
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "VLAN response, "
"vid=0x%x.\n", vid);
if (vid > 0 && qedf->vlan_id != vid) {
qedf_set_vlan_id(qedf, vid);
/* Inform waiter that it's ok to call fcoe_ctlr_link up() */
complete(&qedf->fipvlan_compl);
}
}
void qedf_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
{
struct qedf_ctx *qedf = container_of(fip, struct qedf_ctx, ctlr);
struct ethhdr *eth_hdr;
struct vlan_ethhdr *vlan_hdr;
struct fip_header *fiph;
u16 op, vlan_tci = 0;
u8 sub;
if (!test_bit(QEDF_LL2_STARTED, &qedf->flags)) {
QEDF_WARN(&(qedf->dbg_ctx), "LL2 not started\n");
kfree_skb(skb);
return;
}
fiph = (struct fip_header *) ((void *)skb->data + 2 * ETH_ALEN + 2);
eth_hdr = (struct ethhdr *)skb_mac_header(skb);
op = ntohs(fiph->fip_op);
sub = fiph->fip_subcode;
if (!qedf->vlan_hw_insert) {
vlan_hdr = (struct vlan_ethhdr *)skb_push(skb, sizeof(*vlan_hdr)
- sizeof(*eth_hdr));
memcpy(vlan_hdr, eth_hdr, 2 * ETH_ALEN);
vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
vlan_hdr->h_vlan_encapsulated_proto = eth_hdr->h_proto;
vlan_hdr->h_vlan_TCI = vlan_tci = htons(qedf->vlan_id);
}
/* Update eth_hdr since we added a VLAN tag */
eth_hdr = (struct ethhdr *)skb_mac_header(skb);
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2, "FIP frame send: "
"dest=%pM op=%x sub=%x vlan=%04x.", eth_hdr->h_dest, op, sub,
ntohs(vlan_tci));
if (qedf_dump_frames)
print_hex_dump(KERN_WARNING, "fip ", DUMP_PREFIX_OFFSET, 16, 1,
skb->data, skb->len, false);
qed_ops->ll2->start_xmit(qedf->cdev, skb);
}
/* Process incoming FIP frames. */
void qedf_fip_recv(struct qedf_ctx *qedf, struct sk_buff *skb)
{
struct ethhdr *eth_hdr;
struct fip_header *fiph;
struct fip_desc *desc;
struct fip_mac_desc *mp;
struct fip_wwn_desc *wp;
struct fip_vn_desc *vp;
size_t rlen, dlen;
uint32_t cvl_port_id;
__u8 cvl_mac[ETH_ALEN];
u16 op;
u8 sub;
eth_hdr = (struct ethhdr *)skb_mac_header(skb);
fiph = (struct fip_header *) ((void *)skb->data + 2 * ETH_ALEN + 2);
op = ntohs(fiph->fip_op);
sub = fiph->fip_subcode;
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2, "FIP frame received: "
"skb=%p fiph=%p source=%pM op=%x sub=%x", skb, fiph,
eth_hdr->h_source, op, sub);
if (qedf_dump_frames)
print_hex_dump(KERN_WARNING, "fip ", DUMP_PREFIX_OFFSET, 16, 1,
skb->data, skb->len, false);
/* Handle FIP VLAN resp in the driver */
if (op == FIP_OP_VLAN && sub == FIP_SC_VL_NOTE) {
qedf_fcoe_process_vlan_resp(qedf, skb);
qedf->vlan_hw_insert = 0;
kfree_skb(skb);
} else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) {
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "Clear virtual "
"link received.\n");
/* Check that an FCF has been selected by fcoe */
if (qedf->ctlr.sel_fcf == NULL) {
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
"Dropping CVL since FCF has not been selected "
"yet.");
return;
}
cvl_port_id = 0;
memset(cvl_mac, 0, ETH_ALEN);
/*
* We need to loop through the CVL descriptors to determine
* if we want to reset the fcoe link
*/
rlen = ntohs(fiph->fip_dl_len) * FIP_BPW;
desc = (struct fip_desc *)(fiph + 1);
while (rlen >= sizeof(*desc)) {
dlen = desc->fip_dlen * FIP_BPW;
switch (desc->fip_dtype) {
case FIP_DT_MAC:
mp = (struct fip_mac_desc *)desc;
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
"fd_mac=%pM.\n", __func__, mp->fd_mac);
ether_addr_copy(cvl_mac, mp->fd_mac);
break;
case FIP_DT_NAME:
wp = (struct fip_wwn_desc *)desc;
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
"fc_wwpn=%016llx.\n",
get_unaligned_be64(&wp->fd_wwn));
break;
case FIP_DT_VN_ID:
vp = (struct fip_vn_desc *)desc;
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
"fd_fc_id=%x.\n", ntoh24(vp->fd_fc_id));
cvl_port_id = ntoh24(vp->fd_fc_id);
break;
default:
/* Ignore anything else */
break;
}
desc = (struct fip_desc *)((char *)desc + dlen);
rlen -= dlen;
}
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
"cvl_port_id=%06x cvl_mac=%pM.\n", cvl_port_id,
cvl_mac);
if (cvl_port_id == qedf->lport->port_id &&
ether_addr_equal(cvl_mac,
qedf->ctlr.sel_fcf->fcf_mac)) {
fcoe_ctlr_link_down(&qedf->ctlr);
qedf_wait_for_upload(qedf);
fcoe_ctlr_link_up(&qedf->ctlr);
}
kfree_skb(skb);
} else {
/* Everything else is handled by libfcoe */
__skb_pull(skb, ETH_HLEN);
fcoe_ctlr_recv(&qedf->ctlr, skb);
}
}
void qedf_update_src_mac(struct fc_lport *lport, u8 *addr)
{
struct qedf_ctx *qedf = lport_priv(lport);
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
"Setting data_src_addr=%pM.\n", addr);
ether_addr_copy(qedf->data_src_addr, addr);
}
u8 *qedf_get_src_mac(struct fc_lport *lport)
{
u8 mac[ETH_ALEN];
u8 port_id[3];
struct qedf_ctx *qedf = lport_priv(lport);
/* We need to use the lport port_id to create the data_src_addr */
if (is_zero_ether_addr(qedf->data_src_addr)) {
hton24(port_id, lport->port_id);
fc_fcoe_set_mac(mac, port_id);
qedf->ctlr.update_mac(lport, mac);
}
return qedf->data_src_addr;
}

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/*
* QLogic FCoE Offload Driver
* Copyright (c) 2016 Cavium Inc.
*
* This software is available under the terms of the GNU General Public License
* (GPL) Version 2, available from the file COPYING in the main directory of
* this source tree.
*/
#ifndef __QEDF_HSI__
#define __QEDF_HSI__
/*
* Add include to common target
*/
#include <linux/qed/common_hsi.h>
/*
* Add include to common storage target
*/
#include <linux/qed/storage_common.h>
/*
* Add include to common fcoe target for both eCore and protocol driver
*/
#include <linux/qed/fcoe_common.h>
/*
* FCoE CQ element ABTS information
*/
struct fcoe_abts_info {
u8 r_ctl /* R_CTL in the ABTS response frame */;
u8 reserved0;
__le16 rx_id;
__le32 reserved2[2];
__le32 fc_payload[3] /* ABTS FC payload response frame */;
};
/*
* FCoE class type
*/
enum fcoe_class_type {
FCOE_TASK_CLASS_TYPE_3,
FCOE_TASK_CLASS_TYPE_2,
MAX_FCOE_CLASS_TYPE
};
/*
* FCoE CMDQ element control information
*/
struct fcoe_cmdqe_control {
__le16 conn_id;
u8 num_additional_cmdqes;
u8 cmdType;
/* true for ABTS request cmdqe. used in Target mode */
#define FCOE_CMDQE_CONTROL_ABTSREQCMD_MASK 0x1
#define FCOE_CMDQE_CONTROL_ABTSREQCMD_SHIFT 0
#define FCOE_CMDQE_CONTROL_RESERVED1_MASK 0x7F
#define FCOE_CMDQE_CONTROL_RESERVED1_SHIFT 1
u8 reserved2[4];
};
/*
* FCoE control + payload CMDQ element
*/
struct fcoe_cmdqe {
struct fcoe_cmdqe_control hdr;
u8 fc_header[24];
__le32 fcp_cmd_payload[8];
};
/*
* FCP RSP flags
*/
struct fcoe_fcp_rsp_flags {
u8 flags;
#define FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID_MASK 0x1
#define FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID_SHIFT 0
#define FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID_MASK 0x1
#define FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID_SHIFT 1
#define FCOE_FCP_RSP_FLAGS_FCP_RESID_OVER_MASK 0x1
#define FCOE_FCP_RSP_FLAGS_FCP_RESID_OVER_SHIFT 2
#define FCOE_FCP_RSP_FLAGS_FCP_RESID_UNDER_MASK 0x1
#define FCOE_FCP_RSP_FLAGS_FCP_RESID_UNDER_SHIFT 3
#define FCOE_FCP_RSP_FLAGS_FCP_CONF_REQ_MASK 0x1
#define FCOE_FCP_RSP_FLAGS_FCP_CONF_REQ_SHIFT 4
#define FCOE_FCP_RSP_FLAGS_FCP_BIDI_FLAGS_MASK 0x7
#define FCOE_FCP_RSP_FLAGS_FCP_BIDI_FLAGS_SHIFT 5
};
/*
* FCoE CQ element response information
*/
struct fcoe_cqe_rsp_info {
struct fcoe_fcp_rsp_flags rsp_flags;
u8 scsi_status_code;
__le16 retry_delay_timer;
__le32 fcp_resid;
__le32 fcp_sns_len;
__le32 fcp_rsp_len;
__le16 rx_id;
u8 fw_error_flags;
#define FCOE_CQE_RSP_INFO_FW_UNDERRUN_MASK 0x1 /* FW detected underrun */
#define FCOE_CQE_RSP_INFO_FW_UNDERRUN_SHIFT 0
#define FCOE_CQE_RSP_INFO_RESREVED_MASK 0x7F
#define FCOE_CQE_RSP_INFO_RESREVED_SHIFT 1
u8 reserved;
__le32 fw_residual /* Residual bytes calculated by FW */;
};
/*
* FCoE CQ element Target completion information
*/
struct fcoe_cqe_target_info {
__le16 rx_id;
__le16 reserved0;
__le32 reserved1[5];
};
/*
* FCoE error/warning reporting entry
*/
struct fcoe_err_report_entry {
__le32 err_warn_bitmap_lo /* Error bitmap lower 32 bits */;
__le32 err_warn_bitmap_hi /* Error bitmap higher 32 bits */;
/* Buffer offset the beginning of the Sequence last transmitted */
__le32 tx_buf_off;
/* Buffer offset from the beginning of the Sequence last received */
__le32 rx_buf_off;
__le16 rx_id /* RX_ID of the associated task */;
__le16 reserved1;
__le32 reserved2;
};
/*
* FCoE CQ element middle path information
*/
struct fcoe_cqe_midpath_info {
__le32 data_placement_size;
__le16 rx_id;
__le16 reserved0;
__le32 reserved1[4];
};
/*
* FCoE CQ element unsolicited information
*/
struct fcoe_unsolic_info {
/* BD information: Physical address and opaque data */
struct scsi_bd bd_info;
__le16 conn_id /* Connection ID the frame is associated to */;
__le16 pkt_len /* Packet length */;
u8 reserved1[4];
};
/*
* FCoE warning reporting entry
*/
struct fcoe_warning_report_entry {
/* BD information: Physical address and opaque data */
struct scsi_bd bd_info;
/* Buffer offset the beginning of the Sequence last transmitted */
__le32 buf_off;
__le16 rx_id /* RX_ID of the associated task */;
__le16 reserved1;
};
/*
* FCoE CQ element information
*/
union fcoe_cqe_info {
struct fcoe_cqe_rsp_info rsp_info /* Response completion information */;
/* Target completion information */
struct fcoe_cqe_target_info target_info;
/* Error completion information */
struct fcoe_err_report_entry err_info;
struct fcoe_abts_info abts_info /* ABTS completion information */;
/* Middle path completion information */
struct fcoe_cqe_midpath_info midpath_info;
/* Unsolicited packet completion information */
struct fcoe_unsolic_info unsolic_info;
/* Warning completion information (Rec Tov expiration) */
struct fcoe_warning_report_entry warn_info;
};
/*
* FCoE CQ element
*/
struct fcoe_cqe {
__le32 cqe_data;
/* The task identifier (OX_ID) to be completed */
#define FCOE_CQE_TASK_ID_MASK 0xFFFF
#define FCOE_CQE_TASK_ID_SHIFT 0
/*
* The CQE type: 0x0 Indicating on a pending work request completion.
* 0x1 - Indicating on an unsolicited event notification. use enum
* fcoe_cqe_type (use enum fcoe_cqe_type)
*/
#define FCOE_CQE_CQE_TYPE_MASK 0xF
#define FCOE_CQE_CQE_TYPE_SHIFT 16
#define FCOE_CQE_RESERVED0_MASK 0xFFF
#define FCOE_CQE_RESERVED0_SHIFT 20
__le16 reserved1;
__le16 fw_cq_prod;
union fcoe_cqe_info cqe_info;
};
/*
* FCoE CQE type
*/
enum fcoe_cqe_type {
/* solicited response on a R/W or middle-path SQE */
FCOE_GOOD_COMPLETION_CQE_TYPE,
FCOE_UNSOLIC_CQE_TYPE /* unsolicited packet, RQ consumed */,
FCOE_ERROR_DETECTION_CQE_TYPE /* timer expiration, validation error */,
FCOE_WARNING_CQE_TYPE /* rec_tov or rr_tov timer expiration */,
FCOE_EXCH_CLEANUP_CQE_TYPE /* task cleanup completed */,
FCOE_ABTS_CQE_TYPE /* ABTS received and task cleaned */,
FCOE_DUMMY_CQE_TYPE /* just increment SQ CONS */,
/* Task was completed wight after sending a pkt to the target */
FCOE_LOCAL_COMP_CQE_TYPE,
MAX_FCOE_CQE_TYPE
};
/*
* FCoE device type
*/
enum fcoe_device_type {
FCOE_TASK_DEV_TYPE_DISK,
FCOE_TASK_DEV_TYPE_TAPE,
MAX_FCOE_DEVICE_TYPE
};
/*
* FCoE fast path error codes
*/
enum fcoe_fp_error_warning_code {
FCOE_ERROR_CODE_XFER_OOO_RO /* XFER error codes */,
FCOE_ERROR_CODE_XFER_RO_NOT_ALIGNED,
FCOE_ERROR_CODE_XFER_NULL_BURST_LEN,
FCOE_ERROR_CODE_XFER_RO_GREATER_THAN_DATA2TRNS,
FCOE_ERROR_CODE_XFER_INVALID_PAYLOAD_SIZE,
FCOE_ERROR_CODE_XFER_TASK_TYPE_NOT_WRITE,
FCOE_ERROR_CODE_XFER_PEND_XFER_SET,
FCOE_ERROR_CODE_XFER_OPENED_SEQ,
FCOE_ERROR_CODE_XFER_FCTL,
FCOE_ERROR_CODE_FCP_RSP_BIDI_FLAGS_SET /* FCP RSP error codes */,
FCOE_ERROR_CODE_FCP_RSP_INVALID_LENGTH_FIELD,
FCOE_ERROR_CODE_FCP_RSP_INVALID_SNS_FIELD,
FCOE_ERROR_CODE_FCP_RSP_INVALID_PAYLOAD_SIZE,
FCOE_ERROR_CODE_FCP_RSP_PEND_XFER_SET,
FCOE_ERROR_CODE_FCP_RSP_OPENED_SEQ,
FCOE_ERROR_CODE_FCP_RSP_FCTL,
FCOE_ERROR_CODE_FCP_RSP_LAST_SEQ_RESET,
FCOE_ERROR_CODE_FCP_RSP_CONF_REQ_NOT_SUPPORTED_YET,
FCOE_ERROR_CODE_DATA_OOO_RO /* FCP DATA error codes */,
FCOE_ERROR_CODE_DATA_EXCEEDS_DEFINED_MAX_FRAME_SIZE,
FCOE_ERROR_CODE_DATA_EXCEEDS_DATA2TRNS,
FCOE_ERROR_CODE_DATA_SOFI3_SEQ_ACTIVE_SET,
FCOE_ERROR_CODE_DATA_SOFN_SEQ_ACTIVE_RESET,
FCOE_ERROR_CODE_DATA_EOFN_END_SEQ_SET,
FCOE_ERROR_CODE_DATA_EOFT_END_SEQ_RESET,
FCOE_ERROR_CODE_DATA_TASK_TYPE_NOT_READ,
FCOE_ERROR_CODE_DATA_FCTL_INITIATIR,
FCOE_ERROR_CODE_MIDPATH_INVALID_TYPE /* Middle path error codes */,
FCOE_ERROR_CODE_MIDPATH_SOFI3_SEQ_ACTIVE_SET,
FCOE_ERROR_CODE_MIDPATH_SOFN_SEQ_ACTIVE_RESET,
FCOE_ERROR_CODE_MIDPATH_EOFN_END_SEQ_SET,
FCOE_ERROR_CODE_MIDPATH_EOFT_END_SEQ_RESET,
FCOE_ERROR_CODE_MIDPATH_REPLY_FCTL,
FCOE_ERROR_CODE_MIDPATH_INVALID_REPLY,
FCOE_ERROR_CODE_MIDPATH_ELS_REPLY_RCTL,
FCOE_ERROR_CODE_COMMON_MIDDLE_FRAME_WITH_PAD /* Common error codes */,
FCOE_ERROR_CODE_COMMON_SEQ_INIT_IN_TCE,
FCOE_ERROR_CODE_COMMON_FC_HDR_RX_ID_MISMATCH,
FCOE_ERROR_CODE_COMMON_INCORRECT_SEQ_CNT,
FCOE_ERROR_CODE_COMMON_DATA_FC_HDR_FCP_TYPE_MISMATCH,
FCOE_ERROR_CODE_COMMON_DATA_NO_MORE_SGES,
FCOE_ERROR_CODE_COMMON_OPTIONAL_FC_HDR,
FCOE_ERROR_CODE_COMMON_READ_TCE_OX_ID_TOO_BIG,
FCOE_ERROR_CODE_COMMON_DATA_WAS_NOT_TRANSMITTED,
FCOE_ERROR_CODE_COMMON_TASK_DDF_RCTL_INFO_FIELD,
FCOE_ERROR_CODE_COMMON_TASK_INVALID_RCTL,
FCOE_ERROR_CODE_COMMON_TASK_RCTL_GENERAL_MISMATCH,
FCOE_ERROR_CODE_E_D_TOV_TIMER_EXPIRATION /* Timer error codes */,
FCOE_WARNING_CODE_REC_TOV_TIMER_EXPIRATION /* Timer error codes */,
FCOE_ERROR_CODE_RR_TOV_TIMER_EXPIRATION /* Timer error codes */,
/* ABTSrsp pckt arrived unexpected */
FCOE_ERROR_CODE_ABTS_REPLY_UNEXPECTED,
FCOE_ERROR_CODE_TARGET_MODE_FCP_RSP,
FCOE_ERROR_CODE_TARGET_MODE_FCP_XFER,
FCOE_ERROR_CODE_TARGET_MODE_DATA_TASK_TYPE_NOT_WRITE,
FCOE_ERROR_CODE_DATA_FCTL_TARGET,
FCOE_ERROR_CODE_TARGET_DATA_SIZE_NO_MATCH_XFER,
FCOE_ERROR_CODE_TARGET_DIF_CRC_CHECKSUM_ERROR,
FCOE_ERROR_CODE_TARGET_DIF_REF_TAG_ERROR,
FCOE_ERROR_CODE_TARGET_DIF_APP_TAG_ERROR,
MAX_FCOE_FP_ERROR_WARNING_CODE
};
/*
* FCoE RESPQ element
*/
struct fcoe_respqe {
__le16 ox_id /* OX_ID that is located in the FCP_RSP FC header */;
__le16 rx_id /* RX_ID that is located in the FCP_RSP FC header */;
__le32 additional_info;
/* PARAM that is located in the FCP_RSP FC header */
#define FCOE_RESPQE_PARAM_MASK 0xFFFFFF
#define FCOE_RESPQE_PARAM_SHIFT 0
/* Indication whther its Target-auto-rsp mode or not */
#define FCOE_RESPQE_TARGET_AUTO_RSP_MASK 0xFF
#define FCOE_RESPQE_TARGET_AUTO_RSP_SHIFT 24
};
/*
* FCoE slow path error codes
*/
enum fcoe_sp_error_code {
/* Error codes for Error Reporting in slow path flows */
FCOE_ERROR_CODE_SLOW_PATH_TOO_MANY_FUNCS,
FCOE_ERROR_SLOW_PATH_CODE_NO_LICENSE,
MAX_FCOE_SP_ERROR_CODE
};
/*
* FCoE SQE request type
*/
enum fcoe_sqe_request_type {
SEND_FCOE_CMD,
SEND_FCOE_MIDPATH,
SEND_FCOE_ABTS_REQUEST,
FCOE_EXCHANGE_CLEANUP,
FCOE_SEQUENCE_RECOVERY,
SEND_FCOE_XFER_RDY,
SEND_FCOE_RSP,
SEND_FCOE_RSP_WITH_SENSE_DATA,
SEND_FCOE_TARGET_DATA,
SEND_FCOE_INITIATOR_DATA,
/*
* Xfer Continuation (==1) ready to be sent. Previous XFERs data
* received successfully.
*/
SEND_FCOE_XFER_CONTINUATION_RDY,
SEND_FCOE_TARGET_ABTS_RSP,
MAX_FCOE_SQE_REQUEST_TYPE
};
/*
* FCoE task TX state
*/
enum fcoe_task_tx_state {
/* Initiate state after driver has initialized the task */
FCOE_TASK_TX_STATE_NORMAL,
/* Updated by TX path after complete transmitting unsolicited packet */
FCOE_TASK_TX_STATE_UNSOLICITED_COMPLETED,
/*
* Updated by TX path after start processing the task requesting the
* cleanup/abort operation
*/
FCOE_TASK_TX_STATE_CLEAN_REQ,
FCOE_TASK_TX_STATE_ABTS /* Updated by TX path during abort procedure */,
/* Updated by TX path during exchange cleanup procedure */
FCOE_TASK_TX_STATE_EXCLEANUP,
/*
* Updated by TX path during exchange cleanup continuation task
* procedure
*/
FCOE_TASK_TX_STATE_EXCLEANUP_TARGET_WRITE_CONT,
/* Updated by TX path during exchange cleanup first xfer procedure */
FCOE_TASK_TX_STATE_EXCLEANUP_TARGET_WRITE,
/* Updated by TX path during exchange cleanup read task in Target */
FCOE_TASK_TX_STATE_EXCLEANUP_TARGET_READ_OR_RSP,
/* Updated by TX path during target exchange cleanup procedure */
FCOE_TASK_TX_STATE_EXCLEANUP_TARGET_WRITE_LAST_CYCLE,
/* Updated by TX path during sequence recovery procedure */
FCOE_TASK_TX_STATE_SEQRECOVERY,
MAX_FCOE_TASK_TX_STATE
};
/*
* FCoE task type
*/
enum fcoe_task_type {
FCOE_TASK_TYPE_WRITE_INITIATOR,
FCOE_TASK_TYPE_READ_INITIATOR,
FCOE_TASK_TYPE_MIDPATH,
FCOE_TASK_TYPE_UNSOLICITED,
FCOE_TASK_TYPE_ABTS,
FCOE_TASK_TYPE_EXCHANGE_CLEANUP,
FCOE_TASK_TYPE_SEQUENCE_CLEANUP,
FCOE_TASK_TYPE_WRITE_TARGET,
FCOE_TASK_TYPE_READ_TARGET,
FCOE_TASK_TYPE_RSP,
FCOE_TASK_TYPE_RSP_SENSE_DATA,
FCOE_TASK_TYPE_ABTS_TARGET,
FCOE_TASK_TYPE_ENUM_SIZE,
MAX_FCOE_TASK_TYPE
};
struct scsi_glbl_queue_entry {
/* Start physical address for the RQ (receive queue) PBL. */
struct regpair rq_pbl_addr;
/* Start physical address for the CQ (completion queue) PBL. */
struct regpair cq_pbl_addr;
/* Start physical address for the CMDQ (command queue) PBL. */
struct regpair cmdq_pbl_addr;
};
#endif /* __QEDF_HSI__ */

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/*
* QLogic FCoE Offload Driver
* Copyright (c) 2016 Cavium Inc.
*
* This software is available under the terms of the GNU General Public License
* (GPL) Version 2, available from the file COPYING in the main directory of
* this source tree.
*/
#define QEDF_VERSION "8.10.7.0"
#define QEDF_DRIVER_MAJOR_VER 8
#define QEDF_DRIVER_MINOR_VER 10
#define QEDF_DRIVER_REV_VER 7
#define QEDF_DRIVER_ENG_VER 0