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5df6d737dd
fnic is a driver for the Cisco PCI-Express FCoE HBA Signed-off-by: Abhijeet Joglekar <abjoglek@cisco.com> Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
266 lines
8.2 KiB
C
266 lines
8.2 KiB
C
/*
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* Copyright 2008 Cisco Systems, Inc. All rights reserved.
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* Copyright 2007 Nuova Systems, Inc. All rights reserved.
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*
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* This program is free software; you may redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef _FNIC_H_
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#define _FNIC_H_
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#include <linux/interrupt.h>
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#include <linux/netdevice.h>
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#include <linux/workqueue.h>
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#include <scsi/libfc.h>
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#include "fnic_io.h"
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#include "fnic_res.h"
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#include "vnic_dev.h"
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#include "vnic_wq.h"
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#include "vnic_rq.h"
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#include "vnic_cq.h"
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#include "vnic_wq_copy.h"
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#include "vnic_intr.h"
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#include "vnic_stats.h"
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#include "vnic_scsi.h"
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#define DRV_NAME "fnic"
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#define DRV_DESCRIPTION "Cisco FCoE HBA Driver"
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#define DRV_VERSION "1.0.0.1121"
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#define PFX DRV_NAME ": "
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#define DFX DRV_NAME "%d: "
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#define DESC_CLEAN_LOW_WATERMARK 8
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#define FNIC_MAX_IO_REQ 2048 /* scsi_cmnd tag map entries */
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#define FNIC_IO_LOCKS 64 /* IO locks: power of 2 */
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#define FNIC_DFLT_QUEUE_DEPTH 32
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#define FNIC_STATS_RATE_LIMIT 4 /* limit rate at which stats are pulled up */
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/*
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* Tag bits used for special requests.
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*/
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#define BIT(nr) (1UL << (nr))
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#define FNIC_TAG_ABORT BIT(30) /* tag bit indicating abort */
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#define FNIC_TAG_DEV_RST BIT(29) /* indicates device reset */
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#define FNIC_TAG_MASK (BIT(24) - 1) /* mask for lookup */
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#define FNIC_NO_TAG -1
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/*
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* Usage of the scsi_cmnd scratchpad.
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* These fields are locked by the hashed io_req_lock.
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*/
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#define CMD_SP(Cmnd) ((Cmnd)->SCp.ptr)
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#define CMD_STATE(Cmnd) ((Cmnd)->SCp.phase)
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#define CMD_ABTS_STATUS(Cmnd) ((Cmnd)->SCp.Message)
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#define CMD_LR_STATUS(Cmnd) ((Cmnd)->SCp.have_data_in)
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#define CMD_TAG(Cmnd) ((Cmnd)->SCp.sent_command)
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#define FCPIO_INVALID_CODE 0x100 /* hdr_status value unused by firmware */
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#define FNIC_LUN_RESET_TIMEOUT 10000 /* mSec */
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#define FNIC_HOST_RESET_TIMEOUT 10000 /* mSec */
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#define FNIC_RMDEVICE_TIMEOUT 1000 /* mSec */
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#define FNIC_HOST_RESET_SETTLE_TIME 30 /* Sec */
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#define FNIC_MAX_FCP_TARGET 256
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extern unsigned int fnic_log_level;
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#define FNIC_MAIN_LOGGING 0x01
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#define FNIC_FCS_LOGGING 0x02
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#define FNIC_SCSI_LOGGING 0x04
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#define FNIC_ISR_LOGGING 0x08
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#define FNIC_CHECK_LOGGING(LEVEL, CMD) \
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do { \
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if (unlikely(fnic_log_level & LEVEL)) \
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do { \
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CMD; \
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} while (0); \
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} while (0)
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#define FNIC_MAIN_DBG(kern_level, host, fmt, args...) \
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FNIC_CHECK_LOGGING(FNIC_MAIN_LOGGING, \
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shost_printk(kern_level, host, fmt, ##args);)
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#define FNIC_FCS_DBG(kern_level, host, fmt, args...) \
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FNIC_CHECK_LOGGING(FNIC_FCS_LOGGING, \
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shost_printk(kern_level, host, fmt, ##args);)
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#define FNIC_SCSI_DBG(kern_level, host, fmt, args...) \
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FNIC_CHECK_LOGGING(FNIC_SCSI_LOGGING, \
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shost_printk(kern_level, host, fmt, ##args);)
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#define FNIC_ISR_DBG(kern_level, host, fmt, args...) \
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FNIC_CHECK_LOGGING(FNIC_ISR_LOGGING, \
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shost_printk(kern_level, host, fmt, ##args);)
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extern const char *fnic_state_str[];
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enum fnic_intx_intr_index {
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FNIC_INTX_WQ_RQ_COPYWQ,
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FNIC_INTX_ERR,
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FNIC_INTX_NOTIFY,
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FNIC_INTX_INTR_MAX,
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};
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enum fnic_msix_intr_index {
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FNIC_MSIX_RQ,
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FNIC_MSIX_WQ,
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FNIC_MSIX_WQ_COPY,
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FNIC_MSIX_ERR_NOTIFY,
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FNIC_MSIX_INTR_MAX,
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};
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struct fnic_msix_entry {
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int requested;
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char devname[IFNAMSIZ];
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irqreturn_t (*isr)(int, void *);
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void *devid;
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};
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enum fnic_state {
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FNIC_IN_FC_MODE = 0,
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FNIC_IN_FC_TRANS_ETH_MODE,
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FNIC_IN_ETH_MODE,
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FNIC_IN_ETH_TRANS_FC_MODE,
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};
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#define FNIC_WQ_COPY_MAX 1
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#define FNIC_WQ_MAX 1
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#define FNIC_RQ_MAX 1
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#define FNIC_CQ_MAX (FNIC_WQ_COPY_MAX + FNIC_WQ_MAX + FNIC_RQ_MAX)
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struct mempool;
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/* Per-instance private data structure */
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struct fnic {
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struct fc_lport *lport;
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struct vnic_dev_bar bar0;
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struct msix_entry msix_entry[FNIC_MSIX_INTR_MAX];
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struct fnic_msix_entry msix[FNIC_MSIX_INTR_MAX];
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struct vnic_stats *stats;
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unsigned long stats_time; /* time of stats update */
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struct vnic_nic_cfg *nic_cfg;
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char name[IFNAMSIZ];
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struct timer_list notify_timer; /* used for MSI interrupts */
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unsigned int err_intr_offset;
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unsigned int link_intr_offset;
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unsigned int wq_count;
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unsigned int cq_count;
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u32 fcoui_mode:1; /* use fcoui address*/
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u32 vlan_hw_insert:1; /* let hw insert the tag */
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u32 in_remove:1; /* fnic device in removal */
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u32 stop_rx_link_events:1; /* stop proc. rx frames, link events */
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struct completion *remove_wait; /* device remove thread blocks */
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struct fc_frame *flogi;
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struct fc_frame *flogi_resp;
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u16 flogi_oxid;
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unsigned long s_id;
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enum fnic_state state;
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spinlock_t fnic_lock;
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u16 vlan_id; /* VLAN tag including priority */
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u8 mac_addr[ETH_ALEN];
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u8 dest_addr[ETH_ALEN];
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u8 data_src_addr[ETH_ALEN];
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u64 fcp_input_bytes; /* internal statistic */
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u64 fcp_output_bytes; /* internal statistic */
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u32 link_down_cnt;
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int link_status;
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struct list_head list;
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struct pci_dev *pdev;
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struct vnic_fc_config config;
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struct vnic_dev *vdev;
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unsigned int raw_wq_count;
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unsigned int wq_copy_count;
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unsigned int rq_count;
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int fw_ack_index[FNIC_WQ_COPY_MAX];
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unsigned short fw_ack_recd[FNIC_WQ_COPY_MAX];
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unsigned short wq_copy_desc_low[FNIC_WQ_COPY_MAX];
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unsigned int intr_count;
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u32 __iomem *legacy_pba;
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struct fnic_host_tag *tags;
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mempool_t *io_req_pool;
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mempool_t *io_sgl_pool[FNIC_SGL_NUM_CACHES];
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spinlock_t io_req_lock[FNIC_IO_LOCKS]; /* locks for scsi cmnds */
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struct work_struct link_work;
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struct work_struct frame_work;
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struct sk_buff_head frame_queue;
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/* copy work queue cache line section */
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____cacheline_aligned struct vnic_wq_copy wq_copy[FNIC_WQ_COPY_MAX];
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/* completion queue cache line section */
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____cacheline_aligned struct vnic_cq cq[FNIC_CQ_MAX];
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spinlock_t wq_copy_lock[FNIC_WQ_COPY_MAX];
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/* work queue cache line section */
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____cacheline_aligned struct vnic_wq wq[FNIC_WQ_MAX];
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spinlock_t wq_lock[FNIC_WQ_MAX];
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/* receive queue cache line section */
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____cacheline_aligned struct vnic_rq rq[FNIC_RQ_MAX];
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/* interrupt resource cache line section */
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____cacheline_aligned struct vnic_intr intr[FNIC_MSIX_INTR_MAX];
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};
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extern struct workqueue_struct *fnic_event_queue;
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extern struct device_attribute *fnic_attrs[];
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void fnic_clear_intr_mode(struct fnic *fnic);
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int fnic_set_intr_mode(struct fnic *fnic);
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void fnic_free_intr(struct fnic *fnic);
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int fnic_request_intr(struct fnic *fnic);
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int fnic_send(struct fc_lport *, struct fc_frame *);
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void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf);
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void fnic_handle_frame(struct work_struct *work);
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void fnic_handle_link(struct work_struct *work);
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int fnic_rq_cmpl_handler(struct fnic *fnic, int);
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int fnic_alloc_rq_frame(struct vnic_rq *rq);
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void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf);
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int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp);
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int fnic_queuecommand(struct scsi_cmnd *, void (*done)(struct scsi_cmnd *));
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int fnic_abort_cmd(struct scsi_cmnd *);
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int fnic_device_reset(struct scsi_cmnd *);
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int fnic_host_reset(struct scsi_cmnd *);
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int fnic_reset(struct Scsi_Host *);
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void fnic_scsi_cleanup(struct fc_lport *);
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void fnic_scsi_abort_io(struct fc_lport *);
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void fnic_empty_scsi_cleanup(struct fc_lport *);
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void fnic_exch_mgr_reset(struct fc_lport *, u32, u32);
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int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int);
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int fnic_wq_cmpl_handler(struct fnic *fnic, int);
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int fnic_flogi_reg_handler(struct fnic *fnic);
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void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
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struct fcpio_host_req *desc);
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int fnic_fw_reset_handler(struct fnic *fnic);
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void fnic_terminate_rport_io(struct fc_rport *);
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const char *fnic_state_to_str(unsigned int state);
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void fnic_log_q_error(struct fnic *fnic);
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void fnic_handle_link_event(struct fnic *fnic);
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#endif /* _FNIC_H_ */
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