366 lines
8.6 KiB
C
366 lines
8.6 KiB
C
/*
|
|
* QLogic iSCSI 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 _QEDI_H_
|
|
#define _QEDI_H_
|
|
|
|
#define __PREVENT_QED_HSI__
|
|
|
|
#include <scsi/scsi_transport_iscsi.h>
|
|
#include <scsi/libiscsi.h>
|
|
#include <scsi/scsi_host.h>
|
|
#include <linux/uio_driver.h>
|
|
|
|
#include "qedi_hsi.h"
|
|
#include <linux/qed/qed_if.h>
|
|
#include "qedi_dbg.h"
|
|
#include <linux/qed/qed_iscsi_if.h>
|
|
#include <linux/qed/qed_ll2_if.h>
|
|
#include "qedi_version.h"
|
|
|
|
#define QEDI_MODULE_NAME "qedi"
|
|
|
|
struct qedi_endpoint;
|
|
|
|
/*
|
|
* PCI function probe defines
|
|
*/
|
|
#define QEDI_MODE_NORMAL 0
|
|
#define QEDI_MODE_RECOVERY 1
|
|
|
|
#define ISCSI_WQE_SET_PTU_INVALIDATE 1
|
|
#define QEDI_MAX_ISCSI_TASK 4096
|
|
#define QEDI_MAX_TASK_NUM 0x0FFF
|
|
#define QEDI_MAX_ISCSI_CONNS_PER_HBA 1024
|
|
#define QEDI_ISCSI_MAX_BDS_PER_CMD 255 /* Firmware max BDs is 255 */
|
|
#define MAX_OUSTANDING_TASKS_PER_CON 1024
|
|
|
|
#define QEDI_MAX_BD_LEN 0xffff
|
|
#define QEDI_BD_SPLIT_SZ 0x1000
|
|
#define QEDI_PAGE_SIZE 4096
|
|
#define QEDI_FAST_SGE_COUNT 4
|
|
/* MAX Length for cached SGL */
|
|
#define MAX_SGLEN_FOR_CACHESGL ((1U << 16) - 1)
|
|
|
|
#define MAX_NUM_MSIX_PF 8
|
|
#define MIN_NUM_CPUS_MSIX(x) min((x)->msix_count, num_online_cpus())
|
|
|
|
#define QEDI_LOCAL_PORT_MIN 60000
|
|
#define QEDI_LOCAL_PORT_MAX 61024
|
|
#define QEDI_LOCAL_PORT_RANGE (QEDI_LOCAL_PORT_MAX - QEDI_LOCAL_PORT_MIN)
|
|
#define QEDI_LOCAL_PORT_INVALID 0xffff
|
|
#define TX_RX_RING 16
|
|
#define RX_RING (TX_RX_RING - 1)
|
|
#define LL2_SINGLE_BUF_SIZE 0x400
|
|
#define QEDI_PAGE_SIZE 4096
|
|
#define QEDI_PAGE_ALIGN(addr) ALIGN(addr, QEDI_PAGE_SIZE)
|
|
#define QEDI_PAGE_MASK (~((QEDI_PAGE_SIZE) - 1))
|
|
|
|
#define QEDI_PAGE_SIZE 4096
|
|
#define QEDI_HW_DMA_BOUNDARY 0xfff
|
|
#define QEDI_PATH_HANDLE 0xFE0000000UL
|
|
|
|
struct qedi_uio_ctrl {
|
|
/* meta data */
|
|
u32 uio_hsi_version;
|
|
|
|
/* user writes */
|
|
u32 host_tx_prod;
|
|
u32 host_rx_cons;
|
|
u32 host_rx_bd_cons;
|
|
u32 host_tx_pkt_len;
|
|
u32 host_rx_cons_cnt;
|
|
|
|
/* driver writes */
|
|
u32 hw_tx_cons;
|
|
u32 hw_rx_prod;
|
|
u32 hw_rx_bd_prod;
|
|
u32 hw_rx_prod_cnt;
|
|
|
|
/* other */
|
|
u8 mac_addr[6];
|
|
u8 reserve[2];
|
|
};
|
|
|
|
struct qedi_rx_bd {
|
|
u32 rx_pkt_index;
|
|
u32 rx_pkt_len;
|
|
u16 vlan_id;
|
|
};
|
|
|
|
#define QEDI_RX_DESC_CNT (QEDI_PAGE_SIZE / sizeof(struct qedi_rx_bd))
|
|
#define QEDI_MAX_RX_DESC_CNT (QEDI_RX_DESC_CNT - 1)
|
|
#define QEDI_NUM_RX_BD (QEDI_RX_DESC_CNT * 1)
|
|
#define QEDI_MAX_RX_BD (QEDI_NUM_RX_BD - 1)
|
|
|
|
#define QEDI_NEXT_RX_IDX(x) ((((x) & (QEDI_MAX_RX_DESC_CNT)) == \
|
|
(QEDI_MAX_RX_DESC_CNT - 1)) ? \
|
|
(x) + 2 : (x) + 1)
|
|
|
|
struct qedi_uio_dev {
|
|
struct uio_info qedi_uinfo;
|
|
u32 uio_dev;
|
|
struct list_head list;
|
|
|
|
u32 ll2_ring_size;
|
|
void *ll2_ring;
|
|
|
|
u32 ll2_buf_size;
|
|
void *ll2_buf;
|
|
|
|
void *rx_pkt;
|
|
void *tx_pkt;
|
|
|
|
struct qedi_ctx *qedi;
|
|
struct pci_dev *pdev;
|
|
void *uctrl;
|
|
};
|
|
|
|
/* List to maintain the skb pointers */
|
|
struct skb_work_list {
|
|
struct list_head list;
|
|
struct sk_buff *skb;
|
|
u16 vlan_id;
|
|
};
|
|
|
|
/* Queue sizes in number of elements */
|
|
#define QEDI_SQ_SIZE MAX_OUSTANDING_TASKS_PER_CON
|
|
#define QEDI_CQ_SIZE 2048
|
|
#define QEDI_CMDQ_SIZE QEDI_MAX_ISCSI_TASK
|
|
#define QEDI_PROTO_CQ_PROD_IDX 0
|
|
|
|
struct qedi_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 {
|
|
union iscsi_cqe *cq;
|
|
dma_addr_t cq_dma;
|
|
u32 cq_mem_size;
|
|
u32 cq_cons_idx; /* Completion queue consumer index */
|
|
|
|
void *cq_pbl;
|
|
dma_addr_t cq_pbl_dma;
|
|
u32 cq_pbl_size;
|
|
|
|
};
|
|
|
|
struct qedi_fastpath {
|
|
struct qed_sb_info *sb_info;
|
|
u16 sb_id;
|
|
#define QEDI_NAME_SIZE 16
|
|
char name[QEDI_NAME_SIZE];
|
|
struct qedi_ctx *qedi;
|
|
};
|
|
|
|
/* Used to pass fastpath information needed to process CQEs */
|
|
struct qedi_io_work {
|
|
struct list_head list;
|
|
struct iscsi_cqe_solicited cqe;
|
|
u16 que_idx;
|
|
};
|
|
|
|
/**
|
|
* struct iscsi_cid_queue - Per adapter iscsi cid queue
|
|
*
|
|
* @cid_que_base: queue base memory
|
|
* @cid_que: queue memory pointer
|
|
* @cid_q_prod_idx: produce index
|
|
* @cid_q_cons_idx: consumer index
|
|
* @cid_q_max_idx: max index. used to detect wrap around condition
|
|
* @cid_free_cnt: queue size
|
|
* @conn_cid_tbl: iscsi cid to conn structure mapping table
|
|
*
|
|
* Per adapter iSCSI CID Queue
|
|
*/
|
|
struct iscsi_cid_queue {
|
|
void *cid_que_base;
|
|
u32 *cid_que;
|
|
u32 cid_q_prod_idx;
|
|
u32 cid_q_cons_idx;
|
|
u32 cid_q_max_idx;
|
|
u32 cid_free_cnt;
|
|
struct qedi_conn **conn_cid_tbl;
|
|
};
|
|
|
|
struct qedi_portid_tbl {
|
|
spinlock_t lock; /* Port id lock */
|
|
u16 start;
|
|
u16 max;
|
|
u16 next;
|
|
unsigned long *table;
|
|
};
|
|
|
|
struct qedi_itt_map {
|
|
__le32 itt;
|
|
struct qedi_cmd *p_cmd;
|
|
};
|
|
|
|
/* I/O tracing entry */
|
|
#define QEDI_IO_TRACE_SIZE 2048
|
|
struct qedi_io_log {
|
|
#define QEDI_IO_TRACE_REQ 0
|
|
#define QEDI_IO_TRACE_RSP 1
|
|
u8 direction;
|
|
u16 task_id;
|
|
u32 cid;
|
|
u32 port_id; /* Remote port fabric ID */
|
|
int lun;
|
|
u8 op; /* SCSI CDB */
|
|
u8 lba[4];
|
|
unsigned int bufflen; /* SCSI buffer length */
|
|
unsigned int sg_count; /* Number of SG elements */
|
|
u8 fast_sgs; /* number of fast sgls */
|
|
u8 slow_sgs; /* number of slow sgls */
|
|
u8 cached_sgs; /* number of cached sgls */
|
|
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 blk_req_cpu; /* CPU that the task is queued on by
|
|
* blk layer
|
|
*/
|
|
unsigned int req_cpu; /* CPU that the task is queued on */
|
|
unsigned int intr_cpu; /* Interrupt CPU that the task is received on */
|
|
unsigned int blk_rsp_cpu;/* CPU that task is actually processed and
|
|
* returned to blk layer
|
|
*/
|
|
bool cached_sge;
|
|
bool slow_sge;
|
|
bool fast_sge;
|
|
};
|
|
|
|
/* Number of entries in BDQ */
|
|
#define QEDI_BDQ_NUM 256
|
|
#define QEDI_BDQ_BUF_SIZE 256
|
|
|
|
/* DMA coherent buffers for BDQ */
|
|
struct qedi_bdq_buf {
|
|
void *buf_addr;
|
|
dma_addr_t buf_dma;
|
|
};
|
|
|
|
/* Main port level struct */
|
|
struct qedi_ctx {
|
|
struct qedi_dbg_ctx dbg_ctx;
|
|
struct Scsi_Host *shost;
|
|
struct pci_dev *pdev;
|
|
struct qed_dev *cdev;
|
|
struct qed_dev_iscsi_info dev_info;
|
|
struct qed_int_info int_info;
|
|
struct qedi_glbl_q_params *p_cpuq;
|
|
struct global_queue **global_queues;
|
|
/* uio declaration */
|
|
struct qedi_uio_dev *udev;
|
|
struct list_head ll2_skb_list;
|
|
spinlock_t ll2_lock; /* Light L2 lock */
|
|
spinlock_t hba_lock; /* per port lock */
|
|
struct task_struct *ll2_recv_thread;
|
|
unsigned long flags;
|
|
#define UIO_DEV_OPENED 1
|
|
#define QEDI_IOTHREAD_WAKE 2
|
|
#define QEDI_IN_RECOVERY 5
|
|
#define QEDI_IN_OFFLINE 6
|
|
|
|
u8 mac[ETH_ALEN];
|
|
u32 src_ip[4];
|
|
u8 ip_type;
|
|
|
|
/* Physical address of above array */
|
|
dma_addr_t hw_p_cpuq;
|
|
|
|
struct qedi_bdq_buf bdq[QEDI_BDQ_NUM];
|
|
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;
|
|
u16 bdq_prod_idx;
|
|
u16 rq_num_entries;
|
|
|
|
u32 msix_count;
|
|
u32 max_sqes;
|
|
u8 num_queues;
|
|
u32 max_active_conns;
|
|
|
|
struct iscsi_cid_queue cid_que;
|
|
struct qedi_endpoint **ep_tbl;
|
|
struct qedi_portid_tbl lcl_port_tbl;
|
|
|
|
/* Rx fast path intr context */
|
|
struct qed_sb_info *sb_array;
|
|
struct qedi_fastpath *fp_array;
|
|
struct qed_iscsi_tid tasks;
|
|
|
|
#define QEDI_LINK_DOWN 0
|
|
#define QEDI_LINK_UP 1
|
|
atomic_t link_state;
|
|
|
|
#define QEDI_RESERVE_TASK_ID 0
|
|
#define MAX_ISCSI_TASK_ENTRIES 4096
|
|
#define QEDI_INVALID_TASK_ID (MAX_ISCSI_TASK_ENTRIES + 1)
|
|
unsigned long task_idx_map[MAX_ISCSI_TASK_ENTRIES / BITS_PER_LONG];
|
|
struct qedi_itt_map *itt_map;
|
|
u16 tid_reuse_count[QEDI_MAX_ISCSI_TASK];
|
|
struct qed_pf_params pf_params;
|
|
|
|
struct workqueue_struct *tmf_thread;
|
|
struct workqueue_struct *offload_thread;
|
|
|
|
u16 ll2_mtu;
|
|
|
|
struct workqueue_struct *dpc_wq;
|
|
|
|
spinlock_t task_idx_lock; /* To protect gbl context */
|
|
s32 last_tidx_alloc;
|
|
s32 last_tidx_clear;
|
|
|
|
struct qedi_io_log io_trace_buf[QEDI_IO_TRACE_SIZE];
|
|
spinlock_t io_trace_lock; /* prtect trace Log buf */
|
|
u16 io_trace_idx;
|
|
unsigned int intr_cpu;
|
|
u32 cached_sgls;
|
|
bool use_cached_sge;
|
|
u32 slow_sgls;
|
|
bool use_slow_sge;
|
|
u32 fast_sgls;
|
|
bool use_fast_sge;
|
|
|
|
atomic_t num_offloads;
|
|
};
|
|
|
|
struct qedi_work {
|
|
struct list_head list;
|
|
struct qedi_ctx *qedi;
|
|
union iscsi_cqe cqe;
|
|
u16 que_idx;
|
|
bool is_solicited;
|
|
};
|
|
|
|
struct qedi_percpu_s {
|
|
struct task_struct *iothread;
|
|
struct list_head work_list;
|
|
spinlock_t p_work_lock; /* Per cpu worker lock */
|
|
};
|
|
|
|
static inline void *qedi_get_task_mem(struct qed_iscsi_tid *info, u32 tid)
|
|
{
|
|
return (info->blocks[tid / info->num_tids_per_block] +
|
|
(tid % info->num_tids_per_block) * info->size);
|
|
}
|
|
|
|
#define QEDI_U64_HI(val) ((u32)(((u64)(val)) >> 32))
|
|
#define QEDI_U64_LO(val) ((u32)(((u64)(val)) & 0xffffffff))
|
|
|
|
#endif /* _QEDI_H_ */
|