Release 4.7 drivers/scsi/snic/snic_fwint.h
/*
* Copyright 2014 Cisco Systems, Inc. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef __SNIC_FWINT_H
#define __SNIC_FWINT_H
#define SNIC_CDB_LEN 32
/* SCSI CDB size 32, can be used for 16 bytes */
#define LUN_ADDR_LEN 8
/*
* Command entry type
*/
enum snic_io_type {
/*
* Initiator request types
*/
SNIC_REQ_REPORT_TGTS = 0x2, /* Report Targets */
SNIC_REQ_ICMND, /* Initiator command for SCSI IO */
SNIC_REQ_ITMF, /* Initiator command for Task Mgmt */
SNIC_REQ_HBA_RESET, /* SNIC Reset */
SNIC_REQ_EXCH_VER, /* Exchange Version Information */
SNIC_REQ_TGT_INFO, /* Backend/Target Information */
SNIC_REQ_BOOT_LUNS,
/*
* Response type
*/
SNIC_RSP_REPORT_TGTS_CMPL = 0x12,/* Report Targets Completion */
SNIC_RSP_ICMND_CMPL, /* SCSI IO Completion */
SNIC_RSP_ITMF_CMPL, /* Task Management Completion */
SNIC_RSP_HBA_RESET_CMPL, /* SNIC Reset Completion */
SNIC_RSP_EXCH_VER_CMPL, /* Exchange Version Completion*/
SNIC_RSP_BOOT_LUNS_CMPL,
/*
* Misc Request types
*/
SNIC_MSG_ACK = 0x80, /* Ack: snic_notify_msg */
SNIC_MSG_ASYNC_EVNOTIFY, /* Asynchronous Event Notification */
}; /* end of enum snic_io_type */
/*
* Header status codes from firmware
*/
enum snic_io_status {
SNIC_STAT_IO_SUCCESS = 0, /* request was successful */
/*
* If a request to the fw is rejected, the original request header
* will be returned with the status set to one of the following:
*/
SNIC_STAT_INVALID_HDR, /* header contains invalid data */
SNIC_STAT_OUT_OF_RES, /* out of resources to complete request */
SNIC_STAT_INVALID_PARM, /* some parameter in request is not valid */
SNIC_STAT_REQ_NOT_SUP, /* req type is not supported */
SNIC_STAT_IO_NOT_FOUND, /* requested IO was not found */
/*
* Once a request is processed, the fw will usually return
* a cmpl message type. In cases where errors occurred,
* the header status would be filled in with one of the following:
*/
SNIC_STAT_ABORTED, /* req was aborted */
SNIC_STAT_TIMEOUT, /* req was timed out */
SNIC_STAT_SGL_INVALID, /* req was aborted due to sgl error */
SNIC_STAT_DATA_CNT_MISMATCH, /*recv/sent more/less data than expec */
SNIC_STAT_FW_ERR, /* req was terminated due to fw error */
SNIC_STAT_ITMF_REJECT, /* itmf req was rejected by target */
SNIC_STAT_ITMF_FAIL, /* itmf req was failed */
SNIC_STAT_ITMF_INCORRECT_LUN, /* itmf req has incorrect LUN id*/
SNIC_STAT_CMND_REJECT, /* req was invalid and rejected */
SNIC_STAT_DEV_OFFLINE, /* req sent to offline device */
SNIC_STAT_NO_BOOTLUN,
SNIC_STAT_SCSI_ERR, /* SCSI error returned by Target. */
SNIC_STAT_NOT_READY, /* sNIC Subsystem is not ready */
SNIC_STAT_FATAL_ERROR, /* sNIC is in unrecoverable state */
}; /* end of enum snic_io_status */
/*
* snic_io_hdr : host <--> firmare
*
* for any other message that will be queued to firmware should
* have the following request header
*/
struct snic_io_hdr {
__le32 hid;
__le32 cmnd_id; /* tag here */
ulong init_ctx; /* initiator context */
u8 type; /* request/response type */
u8 status; /* header status entry */
u8 protocol; /* Protocol specific, may needed for RoCE*/
u8 flags;
__le16 sg_cnt;
u16 resvd;
};
/* auxillary funciton for encoding the snic_io_hdr */
static inline void
snic_io_hdr_enc(struct snic_io_hdr *hdr, u8 typ, u8 status, u32 id, u32 hid,
u16 sg_cnt, ulong ctx)
{
hdr->type = typ;
hdr->status = status;
hdr->protocol = 0;
hdr->hid = cpu_to_le32(hid);
hdr->cmnd_id = cpu_to_le32(id);
hdr->sg_cnt = cpu_to_le16(sg_cnt);
hdr->init_ctx = ctx;
hdr->flags = 0;
}
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/* auxillary funciton for decoding the snic_io_hdr */
static inline void
snic_io_hdr_dec(struct snic_io_hdr *hdr, u8 *typ, u8 *stat, u32 *cmnd_id,
u32 *hid, ulong *ctx)
{
*typ = hdr->type;
*stat = hdr->status;
*hid = le32_to_cpu(hdr->hid);
*cmnd_id = le32_to_cpu(hdr->cmnd_id);
*ctx = hdr->init_ctx;
}
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/*
* snic_host_info: host -> firmware
*
* Used for sending host information to firmware, and request fw version
*/
struct snic_exch_ver_req {
__le32 drvr_ver; /* for debugging, when fw dump captured */
__le32 os_type; /* for OS specific features */
};
/*
* os_type flags
* Bit 0-7 : OS information
* Bit 8-31: Feature/Capability Information
*/
#define SNIC_OS_LINUX 0x1
#define SNIC_OS_WIN 0x2
#define SNIC_OS_ESX 0x3
/*
* HBA Capabilities
* Bit 1: Reserved.
* Bit 2: Dynamic Discovery of LUNs.
* Bit 3: Async event notifications on on tgt online/offline events.
* Bit 4: IO timeout support in FW.
* Bit 5-31: Reserved.
*/
#define SNIC_HBA_CAP_DDL 0x02
/* Supports Dynamic Discovery of LUNs */
#define SNIC_HBA_CAP_AEN 0x04
/* Supports Async Event Noitifcation */
#define SNIC_HBA_CAP_TMO 0x08
/* Supports IO timeout in FW */
/*
* snic_exch_ver_rsp : firmware -> host
*
* Used by firmware to send response to version request
*/
struct snic_exch_ver_rsp {
__le32 version;
__le32 hid;
__le32 max_concur_ios; /* max concurrent ios */
__le32 max_sgs_per_cmd; /* max sgls per IO */
__le32 max_io_sz; /* max io size supported */
__le32 hba_cap; /* hba capabilities */
__le32 max_tgts; /* max tgts supported */
__le16 io_timeout; /* FW extended timeout */
u16 rsvd;
};
/*
* snic_report_tgts : host -> firmware request
*
* Used by the host to request list of targets
*/
struct snic_report_tgts {
__le16 sg_cnt;
__le16 flags; /* specific flags from fw */
u8 _resvd[4];
__le64 sg_addr; /* Points to SGL */
__le64 sense_addr;
};
enum snic_type {
SNIC_NONE = 0x0,
SNIC_DAS,
SNIC_SAN,
};
/* Report Target Response */
enum snic_tgt_type {
SNIC_TGT_NONE = 0x0,
SNIC_TGT_DAS, /* DAS Target */
SNIC_TGT_SAN, /* SAN Target */
};
/* target id format */
struct snic_tgt_id {
__le32 tgt_id; /* target id */
__le16 tgt_type; /* tgt type */
__le16 vnic_id; /* corresponding vnic id */
};
/*
* snic_report_tgts_cmpl : firmware -> host response
*
* Used by firmware to send response to Report Targets request
*/
struct snic_report_tgts_cmpl {
__le32 tgt_cnt; /* Number of Targets accessible */
u32 _resvd;
};
/*
* Command flags
*
* Bit 0: Read flags
* Bit 1: Write flag
* Bit 2: ESGL - sg/esg array contains extended sg
* ESGE - is a host buffer contains sg elements
* Bit 3-4: Task Attributes
* 00b - simple
* 01b - head of queue
* 10b - ordered
* Bit 5-7: Priority - future use
* Bit 8-15: Reserved
*/
#define SNIC_ICMND_WR 0x01
/* write command */
#define SNIC_ICMND_RD 0x02
/* read command */
#define SNIC_ICMND_ESGL 0x04
/* SGE/ESGE array contains valid data*/
/*
* Priority/Task Attribute settings
*/
#define SNIC_ICMND_TSK_SHIFT 2
/* task attr starts at bit 2 */
#define SNIC_ICMND_TSK_MASK(x) ((x>>SNIC_ICMND_TSK_SHIFT) & ~(0xffff))
#define SNIC_ICMND_TSK_SIMPLE 0
/* simple task attr */
#define SNIC_ICMND_TSK_HEAD_OF_QUEUE 1
/* head of qeuue task attr */
#define SNIC_ICMND_TSK_ORDERED 2
/* ordered task attr */
#define SNIC_ICMND_PRI_SHIFT 5
/* prio val starts at bit 5 */
/*
* snic_icmnd : host-> firmware request
*
* used for sending out an initiator SCSI 16/32-byte command
*/
struct snic_icmnd {
__le16 sg_cnt; /* Number of SG Elements */
__le16 flags; /* flags */
__le32 sense_len; /* Sense buffer length */
__le64 tgt_id; /* Destination Target ID */
__le64 lun_id; /* Destination LUN ID */
u8 cdb_len;
u8 _resvd;
__le16 time_out; /* ms time for Res allocations fw to handle io*/
__le32 data_len; /* Total number of bytes to be transferred */
u8 cdb[SNIC_CDB_LEN];
__le64 sg_addr; /* Points to SG List */
__le64 sense_addr; /* Sense buffer address */
};
/* Response flags */
/* Bit 0: Under run
* Bit 1: Over Run
* Bit 2-7: Reserved
*/
#define SNIC_ICMND_CMPL_UNDR_RUN 0x01
/* resid under and valid */
#define SNIC_ICMND_CMPL_OVER_RUN 0x02
/* resid over and valid */
/*
* snic_icmnd_cmpl: firmware -> host response
*
* Used for sending the host a response to an icmnd (initiator command)
*/
struct snic_icmnd_cmpl {
u8 scsi_status; /* value as per SAM */
u8 flags;
__le16 sense_len; /* Sense Length */
__le32 resid; /* Residue : # bytes under or over run */
};
/*
* snic_itmf: host->firmware request
*
* used for requesting the firmware to abort a request and/or send out
* a task management function
*
* the req_id field is valid in case of abort task and clear task
*/
struct snic_itmf {
u8 tm_type; /* SCSI Task Management request */
u8 resvd;
__le16 flags; /* flags */
__le32 req_id; /* Command id of snic req to be aborted */
__le64 tgt_id; /* Target ID */
__le64 lun_id; /* Destination LUN ID */
__le16 timeout; /* in sec */
};
/*
* Task Management Request
*/
enum snic_itmf_tm_type {
SNIC_ITMF_ABTS_TASK = 0x01, /* Abort Task */
SNIC_ITMF_ABTS_TASK_SET, /* Abort Task Set */
SNIC_ITMF_CLR_TASK, /* Clear Task */
SNIC_ITMF_CLR_TASKSET, /* Clear Task Set */
SNIC_ITMF_LUN_RESET, /* Lun Reset */
SNIC_ITMF_ABTS_TASK_TERM, /* Supported for SAN Targets */
};
/*
* snic_itmf_cmpl: firmware -> host resposne
*
* used for sending the host a response for a itmf request
*/
struct snic_itmf_cmpl {
__le32 nterminated; /* # IOs terminated as a result of tmf */
u8 flags; /* flags */
u8 _resvd[3];
};
/*
* itmfl_cmpl flags
* Bit 0 : 1 - Num terminated field valid
* Bit 1 - 7 : Reserved
*/
#define SNIC_NUM_TERM_VALID 0x01
/* Number of IOs terminated */
/*
* snic_hba_reset: host -> firmware request
*
* used for requesting firmware to reset snic
*/
struct snic_hba_reset {
__le16 flags; /* flags */
u8 _resvd[6];
};
/*
* snic_hba_reset_cmpl: firmware -> host response
*
* Used by firmware to respond to the host's hba reset request
*/
struct snic_hba_reset_cmpl {
u8 flags; /* flags : more info needs to be added*/
u8 _resvd[7];
};
/*
* snic_notify_msg: firmware -> host response
*
* Used by firmware to notify host of the last work queue entry received
*/
struct snic_notify_msg {
__le32 wqe_num; /* wq entry number */
u8 flags; /* flags, macros */
u8 _resvd[4];
};
#define SNIC_EVDATA_LEN 24
/* in bytes */
/* snic_async_evnotify: firmware -> host notification
*
* Used by firmware to notify the host about configuration/state changes
*/
struct snic_async_evnotify {
u8 FLS_EVENT_DESC;
u8 vnic; /* vnic id */
u8 _resvd[2];
__le32 ev_id; /* Event ID */
u8 ev_data[SNIC_EVDATA_LEN]; /* Event Data */
u8 _resvd2[4];
};
/* async event flags */
enum snic_ev_type {
SNIC_EV_TGT_OFFLINE = 0x01, /* Target Offline, PL contains TGT ID */
SNIC_EV_TGT_ONLINE, /* Target Online, PL contains TGT ID */
SNIC_EV_LUN_OFFLINE, /* LUN Offline, PL contains LUN ID */
SNIC_EV_LUN_ONLINE, /* LUN Online, PL contains LUN ID */
SNIC_EV_CONF_CHG, /* Dev Config/Attr Change Event */
SNIC_EV_TGT_ADDED, /* Target Added */
SNIC_EV_TGT_DELTD, /* Target Del'd, PL contains TGT ID */
SNIC_EV_LUN_ADDED, /* LUN Added */
SNIC_EV_LUN_DELTD, /* LUN Del'd, PL cont. TGT & LUN ID */
SNIC_EV_DISC_CMPL = 0x10, /* Discovery Completed Event */
};
#define SNIC_HOST_REQ_LEN 128
/*Exp length of host req, wq desc sz*/
/* Payload 88 bytes = 128 - 24 - 16 */
#define SNIC_HOST_REQ_PAYLOAD ((int)(SNIC_HOST_REQ_LEN - \
sizeof(struct snic_io_hdr) - \
(2 * sizeof(u64)) - sizeof(ulong)))
/*
* snic_host_req: host -> firmware request
*
* Basic structure for all snic requests that are sent from the host to
* firmware. They are 128 bytes in size.
*/
struct snic_host_req {
u64 ctrl_data[2]; /*16 bytes - Control Data */
struct snic_io_hdr hdr;
union {
/*
* Entry specific space, last byte contains color
*/
u8 buf[SNIC_HOST_REQ_PAYLOAD];
/*
* Exchange firmware version
*/
struct snic_exch_ver_req exch_ver;
/* report targets */
struct snic_report_tgts rpt_tgts;
/* io request */
struct snic_icmnd icmnd;
/* task management request */
struct snic_itmf itmf;
/* hba reset */
struct snic_hba_reset reset;
}
u;
ulong req_pa;
}; /* end of snic_host_req structure */
#define SNIC_FW_REQ_LEN 64
/* Expected length of fw req */
struct snic_fw_req {
struct snic_io_hdr hdr;
union {
/*
* Entry specific space, last byte contains color
*/
u8 buf[SNIC_FW_REQ_LEN - sizeof(struct snic_io_hdr)];
/* Exchange Version Response */
struct snic_exch_ver_rsp exch_ver_cmpl;
/* Report Targets Response */
struct snic_report_tgts_cmpl rpt_tgts_cmpl;
/* scsi response */
struct snic_icmnd_cmpl icmnd_cmpl;
/* task management response */
struct snic_itmf_cmpl itmf_cmpl;
/* hba reset response */
struct snic_hba_reset_cmpl reset_cmpl;
/* notify message */
struct snic_notify_msg ack;
/* async notification event */
struct snic_async_evnotify async_ev;
}
u;
}; /* end of snic_fw_req structure */
/*
* Auxillary macro to verify specific snic req/cmpl structures
* to ensure that it will be aligned to 64 bit, and not using
* color bit field
*/
#define VERIFY_REQ_SZ(x)
#define VERIFY_CMPL_SZ(x)
/*
* Access routines to encode and decode the color bit, which is the most
* significant bit of the structure.
*/
static inline void
snic_color_enc(struct snic_fw_req *req, u8 color)
{
u8 *c = ((u8 *) req) + sizeof(struct snic_fw_req) - 1;
if (color)
*c |= 0x80;
else
*c &= ~0x80;
}
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static inline void
snic_color_dec(struct snic_fw_req *req, u8 *color)
{
u8 *c = ((u8 *) req) + sizeof(struct snic_fw_req) - 1;
*color = *c >> 7;
/* Make sure color bit is read from desc *before* other fields
* are read from desc. Hardware guarantees color bit is last
* bit (byte) written. Adding the rmb() prevents the compiler
* and/or CPU from reordering the reads which would potentially
* result in reading stale values.
*/
rmb();
}
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#endif /* end of __SNIC_FWINT_H */
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