Hi Hannes,
Thank you for reviewing the patch. Please find responses inline.
I will incorporate the comments and suggests in next patch submittal.
On 02/03/15 6:23 pm, "Hannes Reinecke" <h...@suse.de> wrote:
>Hi Narsimhulu,
>
>please find comments inline.
>
>On 02/10/2015 05:43 PM, Narsimhulu Musini wrote:
>> snic_fwint.h contains firmware interface structures.
>>
>> snic_res.h contains firmware request initialization
>>
>> snic_res.c contains retrieval of resource configuration, and allocation,
>> and initialization of HW Queues.
>>
>> snic_isr.c contains interrupt request, release, and handling
>>
>> Signed-off-by: Narsimhulu Musini <nmus...@cisco.com>
>> Signed-off-by: Sesidhar Baddela <sebad...@cisco.com>
>> ---
>> drivers/scsi/snic/snic_fwint.h | 567
>>+++++++++++++++++++++++++++++++++++++++++
>> drivers/scsi/snic/snic_isr.c | 206 +++++++++++++++
>> drivers/scsi/snic/snic_res.c | 318 +++++++++++++++++++++++
>> drivers/scsi/snic/snic_res.h | 96 +++++++
>> 4 files changed, 1187 insertions(+)
>> create mode 100644 drivers/scsi/snic/snic_fwint.h
>> create mode 100644 drivers/scsi/snic/snic_isr.c
>> create mode 100644 drivers/scsi/snic/snic_res.c
>> create mode 100644 drivers/scsi/snic/snic_res.h
>>
>> diff --git a/drivers/scsi/snic/snic_fwint.h
>>b/drivers/scsi/snic/snic_fwint.h
>> new file mode 100644
>> index 0000000..456de1b
>> --- /dev/null
>> +++ b/drivers/scsi/snic/snic_fwint.h
>> @@ -0,0 +1,567 @@
>> +/*
>> + * 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 {
>> + u32 hid;
>> + u32 cmnd_id; /* tag here */
>> + u64 init_ctx; /* initiator context */
>> + u8 type; /* request/response type */
>> + u8 status; /* header status entry */
>> + u8 protocol; /* Protocol specific, may needed for RoCE*/
>> + u8 flags;
>> + u16 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, u64 ctx)
>> +{
>> + hdr->type = typ;
>> + hdr->status = status;
>> + hdr->protocol = 0;
>> + hdr->hid = hid;
>> + hdr->cmnd_id = id;
>> + hdr->sg_cnt = sg_cnt;
>> + hdr->init_ctx = ctx;
>> + hdr->flags = 0;
>> +}
>> +
>> +/* 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, u64 *ctx)
>> +{
>> + *typ = hdr->type;
>> + *stat = hdr->status;
>> + *hid = hdr->hid;
>> + *cmnd_id = hdr->cmnd_id;
>> + *ctx = hdr->init_ctx;
>> +}
>> +
>> +/*
>> + * snic_host_info: host -> firmware
>> + *
>> + * Used for sending host information to firmware, and request fw
>>version
>> + */
>> +struct snic_exch_ver_req {
>> + u32 drvr_ver; /* for debugging, when fw dump captured */
>> + u32 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 {
>> + u32 version;
>> + u32 hid; /* FIXME: u16 hid | u16 vnic id */
>> + u32 max_concur_ios; /* max concurrent ios */
>> + u32 max_sgs_per_cmd; /* max sgls per IO */
>> + u32 max_io_sz; /* max io size supported */
>> + u32 hba_cap; /* hba capabilities */
>> + u32 max_tgts; /* max tgts supported */
>> + u16 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 {
>> + u16 sg_cnt;
>> + u16 flags; /* specific flags from fw */
>> + u8 _resvd[4];
>> + u64 sg_addr; /* Points to SGL */
>> + u64 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 {
>> + u32 tgt_id; /* target id */
>> + u16 tgt_type; /* tgt type */
>> + u16 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 {
>> + u32 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 {
>> + u16 sg_cnt; /* Number of SG Elements */
>> + u16 flags; /* flags */
>> + u32 sense_len; /* Sense buffer length */
>> + u64 tgt_id; /* Destination Target ID */
>> + u64 lun_id; /* Destination LUN ID */
>> + u8 cdb_len;
>> + u8 _resvd;
>> + u16 time_out; /* ms time for Res allocations fw to handle io*/
>> + u32 data_len; /* Total number of bytes to be transferred */
>> + u8 cdb[SNIC_CDB_LEN];
>> + u64 sg_addr; /* Points to SG List */
>> + u64 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;
>> + u16 sense_len; /* Sense Length */
>> + u32 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;
>> + u16 flags; /* flags */
>> + u32 req_id; /* Command id of snic req to be aborted */
>> + u64 tgt_id; /* Target ID */
>> + u64 lun_id; /* Destination LUN ID */
>> + u16 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 {
>> + u32 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 {
>> + u16 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_echo: host -> firmware request
>> + *
>> + * sends a heartbeat echo request to the firmware
>> + */
>> +struct snic_echo {
>> + u64 _resvd;
>> +};
>> +
>> +/* snic_echo_cmpl: firmware -> host response
>> + *
>> + * response to the snic_echo request
>> + */
>> +struct snic_echo_cmpl {
>> + u64 _resvd;
>> +};
>> +
>> +/*
>> + * snic_notify_msg: firmware -> host response
>> + *
>> + * Used by firmware to notify host of the last work queue entry
>>received
>> + */
>> +struct snic_notify_msg {
>> + u32 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; /* TODO: ?? */
>> + u8 vnic; /* vnic id */
>> + u8 _resvd[2];
>> + u32 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, /* TODO:Target Added, PL contains ?? */
>> + SNIC_EV_TGT_DELTD, /* Target Del'd, PL contains TGT ID */
>> + SNIC_EV_LUN_ADDED, /* TODO:LUN Added, PL contains ?? */
>> + 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))))
>> +
>> +/*
>> + * 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;
>> +
>> + /* echo request (heartbeat) */
>> + struct snic_echo echo;
>> + } u;
>> +}; /* 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;
>> +
>> + /* echo response (heartbeat) */
>> + struct snic_echo_cmpl echo_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;
>> +}
>> +
>Ho-hum. You sure this is endian-safe?
At this moment, the driver is supported for x86-64 (little endian)
architecture only.
>
>> +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();
>> +}
>Same here...
At this moment, the driver is supported for x86-64 (little endian)
architecture only.
>
>> +
>> +/*
>> + * Report Target BootLun Response
>> + * snic_report_bootlun_list : fw -> host request
>> + *
>> + * Used by the UEFI driver to request list of target boot lun list.
>> + */
>> +#define MAX_BOOTLUN_LIST_INFO 2
>> +
>> +struct bootlun_info {
>> + u64 scsi_target;
>> + u64 scsi_lun;
>> +};
>> +
>> +struct snic_report_tgt_bootlun {
>> + u64 num_targets;
>> + struct bootlun_info *bootlun_list[MAX_BOOTLUN_LIST_INFO]; /* pt to
>>rsp*/
>> + u64 sg_addr;
>> +};
>> +
>> +#endif /* end of __SNIC_FWINT_H */
>> diff --git a/drivers/scsi/snic/snic_isr.c b/drivers/scsi/snic/snic_isr.c
>> new file mode 100644
>> index 0000000..895ccc4
>> --- /dev/null
>> +++ b/drivers/scsi/snic/snic_isr.c
>> @@ -0,0 +1,206 @@
>> +/*
>> + * 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.
>> + * [Insert appropriate license here when releasing outside of Cisco]
>> + *
>> + */
>> +
>> +#include <linux/string.h>
>> +#include <linux/errno.h>
>> +#include <linux/pci.h>
>> +#include <linux/interrupt.h>
>> +
>> +#include "vnic_dev.h"
>> +#include "vnic_intr.h"
>> +#include "vnic_stats.h"
>> +#include "snic_io.h"
>> +#include "snic.h"
>> +
>> +
>> +/*
>> + * snic_isr_msix_wq : MSIx ISR for work queue.
>> + */
>> +
>> +static irqreturn_t
>> +snic_isr_msix_wq(int irq, void *data)
>> +{
>> + struct snic *snic = data;
>> + unsigned long wq_work_done = 0;
>> +
>> + snic->s_stats.misc.last_isr_time = jiffies;
>> + atomic64_inc(&snic->s_stats.misc.isr_cnt);
>> +
>> + wq_work_done = snic_wq_cmpl_handler(snic, -1);
>> + vnic_intr_return_credits(&snic->intr[SNIC_MSIX_WQ],
>> + wq_work_done,
>> + 1 /* unmask intr */,
>> + 1 /* reset intr timer */);
>> +
>> + return IRQ_HANDLED;
>> +} /* end of snic_isr_msix_wq */
>> +
>> +static irqreturn_t
>> +snic_isr_msix_io_cmpl(int irq, void *data)
>> +{
>> + struct snic *snic = data;
>> + unsigned long iocmpl_work_done = 0;
>> +
>> + snic->s_stats.misc.last_isr_time = jiffies;
>> + atomic64_inc(&snic->s_stats.misc.isr_cnt);
>> +
>> + iocmpl_work_done = snic_fwcq_cmpl_handler(snic, -1);
>> + vnic_intr_return_credits(&snic->intr[SNIC_MSIX_IO_CMPL],
>> + iocmpl_work_done,
>> + 1 /* unmask intr */,
>> + 1 /* reset intr timer */);
>> +
>> + return IRQ_HANDLED;
>> +} /* end of snic_isr_msix_io_cmpl */
>> +
>> +static irqreturn_t
>> +snic_isr_msix_err_notify(int irq, void *data)
>> +{
>> + struct snic *snic = data;
>> +
>> + snic->s_stats.misc.last_isr_time = jiffies;
>> + atomic64_inc(&snic->s_stats.misc.isr_cnt);
>> +
>> + vnic_intr_return_all_credits(&snic->intr[SNIC_MSIX_ERR_NOTIFY]);
>> + snic_log_q_error(snic);
>> +
>> + /*Handling link events */
>> + snic_handle_link_event(snic);
>> +
>> + return IRQ_HANDLED;
>> +} /* end of snic_isr_msix_err_notify */
>> +
>> +
>> +void
>> +snic_free_intr(struct snic *snic)
>> +{
>> + int i;
>> +
>> + /* ONLY interrupt mode MSIX is supported */
>> + for (i = 0; i < ARRAY_SIZE(snic->msix); i++) {
>> + if (snic->msix[i].requested) {
>> + free_irq(snic->msix_entry[i].vector,
>> + snic->msix[i].devid);
>> + }
>> + }
>> +} /* end of snic_free_intr */
>> +
>> +int
>> +snic_request_intr(struct snic *snic)
>> +{
>> + int ret = 0, i;
>> +
>> +#ifdef SNIC_DEBUG
>> + enum vnic_dev_intr_mode intr_mode;
>> +
>> + intr_mode = vnic_dev_get_intr_mode(snic->vdev);
>> + SNIC_BUG_ON(intr_mode != VNIC_DEV_INTR_MODE_MSIX);
>> +#endif
>> +
>> + /* FIXME: Pass devid as work queue or completion queue pointers
>> + * except for err_notify
>> + */
>> + sprintf(snic->msix[SNIC_MSIX_WQ].devname,
>> + "%.11s-scsi-wq",
>> + snic->name);
>> + snic->msix[SNIC_MSIX_WQ].isr = snic_isr_msix_wq;
>> + snic->msix[SNIC_MSIX_WQ].devid = snic;
>> +
>> + /* FIXME: name can be scsi_cq or iocmpl */
>> + sprintf(snic->msix[SNIC_MSIX_IO_CMPL].devname,
>> + "%.11s-io-cmpl",
>> + snic->name);
>> + snic->msix[SNIC_MSIX_IO_CMPL].isr = snic_isr_msix_io_cmpl;
>> + snic->msix[SNIC_MSIX_IO_CMPL].devid = snic;
>> +
>> + sprintf(snic->msix[SNIC_MSIX_ERR_NOTIFY].devname,
>> + "%.11s-err-notify",
>> + snic->name);
>> + snic->msix[SNIC_MSIX_ERR_NOTIFY].isr = snic_isr_msix_err_notify;
>> + snic->msix[SNIC_MSIX_ERR_NOTIFY].devid = snic;
>> +
>> + for (i = 0; i < ARRAY_SIZE(snic->msix); i++) {
>> + ret = request_irq(snic->msix_entry[i].vector,
>> + snic->msix[i].isr,
>> + 0,
>> + snic->msix[i].devname,
>> + snic->msix[i].devid);
>> + if (ret) {
>> + SNIC_HOST_ERR(snic->shost,
>> + "MSI-X: requrest_irq(%d) failed %d\n",
>> + i,
>> + ret);
>> + snic_free_intr(snic);
>> + break;
>> + }
>> + snic->msix[i].requested = 1;
>> + }
>> +
>> + return ret;
>> +} /* end of snic_requrest_intr */
>> +
>> +int
>> +snic_set_intr_mode(struct snic *snic)
>> +{
>> + unsigned int n = ARRAY_SIZE(snic->wq);
>> + unsigned int m = SNIC_CQ_IO_CMPL_MAX;
>> + unsigned int i;
>> +
>> + /*
>> + * We need n WQs, m CQs, and n+m+1 INTRs
>> + * (last INTR is used for WQ/CQ errors and notification area
>> + */
>> +
>> + BUILD_BUG_ON((ARRAY_SIZE(snic->wq) + SNIC_CQ_IO_CMPL_MAX) >
>> + ARRAY_SIZE(snic->intr));
>> + SNIC_BUG_ON(ARRAY_SIZE(snic->msix_entry) < (n + m + 1));
>> +
>> + for (i = 0; i < (n + m + 1); i++)
>> + snic->msix_entry[i].entry = i;
>> +
>> + if (snic->wq_count >= n && snic->cq_count >= (n + m)) {
>> + if (!pci_enable_msix(snic->pdev,
>> + snic->msix_entry,
>> + (n + m + 1))) {
>> + snic->wq_count = n;
>> + snic->cq_count = n + m;
>> + snic->intr_count = n + m + 1;
>> + snic->err_intr_offset = SNIC_MSIX_ERR_NOTIFY;
>> +
>> + SNIC_ISR_DBG(snic->shost,
>> + "Using MSI-X Interrupts\n");
>> + vnic_dev_set_intr_mode(snic->vdev,
>> + VNIC_DEV_INTR_MODE_MSIX);
>> +
>> + return 0;
>> + }
>> + }
>> +
>> + vnic_dev_set_intr_mode(snic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
>> +
>> + return -EINVAL;
>> +} /* end of snic_set_intr_mode */
>> +
>> +void
>> +snic_clear_intr_mode(struct snic *snic)
>> +{
>> + pci_disable_msix(snic->pdev);
>> +
>> + vnic_dev_set_intr_mode(snic->vdev, VNIC_DEV_INTR_MODE_INTX);
>> +}
>> diff --git a/drivers/scsi/snic/snic_res.c b/drivers/scsi/snic/snic_res.c
>> new file mode 100644
>> index 0000000..da27a72
>> --- /dev/null
>> +++ b/drivers/scsi/snic/snic_res.c
>> @@ -0,0 +1,318 @@
>> +/*
>> + * 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.
>> + */
>> +
>> +#include <linux/errno.h>
>> +#include <linux/types.h>
>> +#include <linux/pci.h>
>> +
>> +#include "wq_enet_desc.h"
>> +#include "cq_enet_desc.h"
>> +#include "vnic_resource.h"
>> +#include "vnic_dev.h"
>> +#include "vnic_wq.h"
>> +#include "vnic_cq.h"
>> +#include "vnic_intr.h"
>> +#include "vnic_stats.h"
>> +#include "snic.h"
>> +
>> +int
>> +snic_get_vnic_config(struct snic *snic)
>> +{
>> + struct vnic_snic_config *c = &snic->config;
>> + int ret;
>> +
>> +#define GET_CONFIG(m) \
>> + do { \
>> + ret = vnic_dev_spec(snic->vdev, \
>> + offsetof(struct vnic_snic_config, m), \
>> + sizeof(c->m), \
>> + &c->m); \
>> + if (ret) { \
>> + SNIC_HOST_ERR(snic->shost, \
>> + "Error getting %s, %d\n", #m, ret); \
>> + return ret; \
>> + } \
>> + } while (0)
>> +
>> + GET_CONFIG(wq_enet_desc_count);
>> + GET_CONFIG(maxdatafieldsize);
>> + GET_CONFIG(intr_timer);
>> + GET_CONFIG(intr_timer_type);
>> + GET_CONFIG(flags);
>> + GET_CONFIG(io_throttle_count);
>> + GET_CONFIG(port_down_timeout);
>> + GET_CONFIG(port_down_io_retries);
>> + GET_CONFIG(luns_per_tgt);
>> + GET_CONFIG(xpt_type);
>> + GET_CONFIG(hid);
>> +
>> + c->wq_enet_desc_count = min_t(u32,
>> + VNIC_SNIC_WQ_DESCS_MAX,
>> + max_t(u32,
>> + VNIC_SNIC_WQ_DESCS_MIN,
>> + c->wq_enet_desc_count));
>> +
>> + c->wq_enet_desc_count = ALIGN(c->wq_enet_desc_count, 16);
>> +
>> + c->maxdatafieldsize = min_t(u32,
>> + VNIC_SNIC_MAXDATAFIELDSIZE_MAX,
>> + max_t(u32,
>> + VNIC_SNIC_MAXDATAFIELDSIZE_MIN,
>> + c->maxdatafieldsize));
>> +
>> + c->io_throttle_count = min_t(u32,
>> + VNIC_SNIC_IO_THROTTLE_COUNT_MAX,
>> + max_t(u32,
>> + VNIC_SNIC_IO_THROTTLE_COUNT_MIN,
>> + c->io_throttle_count));
>> +
>> + c->port_down_timeout = min_t(u32,
>> + VNIC_SNIC_PORT_DOWN_TIMEOUT_MAX,
>> + c->port_down_timeout);
>> +
>> + c->port_down_io_retries = min_t(u32,
>> + VNIC_SNIC_PORT_DOWN_IO_RETRIES_MAX,
>> + c->port_down_io_retries);
>> +
>> + c->luns_per_tgt = min_t(u32,
>> + VNIC_SNIC_LUNS_PER_TARGET_MAX,
>> + max_t(u32,
>> + VNIC_SNIC_LUNS_PER_TARGET_MIN,
>> + c->luns_per_tgt));
>> +
>> + c->intr_timer = min_t(u32, VNIC_INTR_TIMER_MAX, c->intr_timer);
>> +
>> + SNIC_INFO("vNIC resources wq %d\n", c->wq_enet_desc_count);
>> + SNIC_INFO("vNIC mtu %d intr timer %d\n",
>> + c->maxdatafieldsize,
>> + c->intr_timer);
>> +
>> + SNIC_INFO("vNIC flags 0x%x luns per tgt %d\n",
>> + c->flags,
>> + c->luns_per_tgt);
>> +
>> + SNIC_INFO("vNIC io throttle count %d\n", c->io_throttle_count);
>> + SNIC_INFO("vNIC port down timeout %d port down io retries %d\n",
>> + c->port_down_timeout,
>> + c->port_down_io_retries);
>> +
>> + SNIC_INFO("vNIC back end type = %d\n", c->xpt_type);
>> + SNIC_INFO("vNIC hid = %d\n", c->hid);
>> +
>> + return 0;
>> +}
>> +
>> +void
>> +snic_get_res_counts(struct snic *snic)
>> +{
>> + snic->wq_count = vnic_dev_get_res_count(snic->vdev, RES_TYPE_WQ);
>> + SNIC_BUG_ON(snic->wq_count == 0);
>> + snic->cq_count = vnic_dev_get_res_count(snic->vdev, RES_TYPE_CQ);
>> + SNIC_BUG_ON(snic->cq_count == 0);
>> + snic->intr_count = vnic_dev_get_res_count(snic->vdev,
>> + RES_TYPE_INTR_CTRL);
>> + SNIC_BUG_ON(snic->intr_count == 0);
>> +}
>> +
>> +void
>> +snic_free_vnic_res(struct snic *snic)
>> +{
>> + unsigned int i;
>> +
>> + for (i = 0; i < snic->wq_count; i++)
>> + vnic_wq_free(&snic->wq[i]);
>> +
>> + for (i = 0; i < snic->cq_count; i++)
>> + vnic_cq_free(&snic->cq[i]);
>> +
>> + for (i = 0; i < snic->intr_count; i++)
>> + vnic_intr_free(&snic->intr[i]);
>> +}
>> +
>> +int
>> +snic_alloc_vnic_res(struct snic *snic)
>> +{
>> + enum vnic_dev_intr_mode intr_mode;
>> + unsigned int mask_on_assertion;
>> + unsigned int intr_offset;
>> + unsigned int err_intr_enable;
>> + unsigned int err_intr_offset;
>> + unsigned int i;
>> + int ret;
>> +
>> + intr_mode = vnic_dev_get_intr_mode(snic->vdev);
>> +
>> + SNIC_INFO("vNIC interrupt mode: %s\n",
>> + ((intr_mode == VNIC_DEV_INTR_MODE_INTX) ?
>> + "Legacy PCI INTx" :
>> + ((intr_mode == VNIC_DEV_INTR_MODE_MSI) ?
>> + "MSI" :
>> + ((intr_mode == VNIC_DEV_INTR_MODE_MSIX) ?
>> + "MSI-X" : "Unknown"))));
>> +
>> + /* only MSI-X is supported */
>> + SNIC_BUG_ON(intr_mode != VNIC_DEV_INTR_MODE_MSIX);
>> +
>> + SNIC_INFO("wq %d cq %d intr %d\n", snic->wq_count,
>> + snic->cq_count,
>> + snic->intr_count);
>> +
>> +
>> + /* Allocate WQs used for SCSI IOs */
>> + for (i = 0; i < snic->wq_count; i++) {
>> + ret = vnic_wq_alloc(snic->vdev,
>> + &snic->wq[i],
>> + i,
>> + snic->config.wq_enet_desc_count,
>> + sizeof(struct wq_enet_desc));
>> + if (ret)
>> + goto error_cleanup;
>> + }
>> +
>> + /* CQ for each WQ */
>> + for (i = 0; i < snic->wq_count; i++) {
>> + ret = vnic_cq_alloc(snic->vdev,
>> + &snic->cq[i],
>> + i,
>> + snic->config.wq_enet_desc_count,
>> + sizeof(struct cq_enet_wq_desc));
>> + if (ret)
>> + goto error_cleanup;
>> + }
>> +
>> +#ifdef SNIC_DEBUG
>> + SNIC_BUG_ON(snic->cq_count != 2 * snic->wq_count);
>> +#endif
>> + /* CQ for FW TO host */
>> + for (i = snic->wq_count; i < snic->cq_count; i++) {
>> + ret = vnic_cq_alloc(snic->vdev,
>> + &snic->cq[i],
>> + i,
>> + (snic->config.wq_enet_desc_count * 3),
>> + sizeof(struct snic_fw_req));
>> + if (ret)
>> + goto error_cleanup;
>> + }
>> +
>> + for (i = 0; i < snic->intr_count; i++) {
>> + ret = vnic_intr_alloc(snic->vdev, &snic->intr[i], i);
>> + if (ret)
>> + goto error_cleanup;
>> + }
>> +
>> + /*
>> + * Init WQ Resources.
>> + * WQ[0 to n] points to CQ[0 to n-1]
>> + * firmware to host comm points to CQ[n to m+1]
>> + */
>> + err_intr_enable = 1;
>> + err_intr_offset = snic->err_intr_offset;
>> +
>> + for (i = 0; i < snic->wq_count; i++) {
>> + vnic_wq_init(&snic->wq[i],
>> + i,
>> + err_intr_enable,
>> + err_intr_offset);
>> + }
>> +
>> + for (i = 0; i < snic->cq_count; i++) {
>> + intr_offset = i;
>> +
>> + vnic_cq_init(&snic->cq[i],
>> + 0 /* flow_control_enable */,
>> + 1 /* color_enable */,
>> + 0 /* cq_head */,
>> + 0 /* cq_tail */,
>> + 1 /* cq_tail_color */,
>> + 1 /* interrupt_enable */,
>> + 1 /* cq_entry_enable */,
>> + 0 /* cq_message_enable */,
>> + intr_offset,
>> + 0 /* cq_message_addr */);
>> + }
>> +
>> + /*
>> + * Init INTR resources
>> + * Assumption : snic is always in MSI-X mode
>> + */
>> + SNIC_BUG_ON(intr_mode != VNIC_DEV_INTR_MODE_MSIX);
>> + mask_on_assertion = 1;
>> +
>> + for (i = 0; i < snic->intr_count; i++) {
>> + vnic_intr_init(&snic->intr[i],
>> + snic->config.intr_timer,
>> + snic->config.intr_timer_type,
>> + mask_on_assertion);
>> + }
>> +
>> + /* init the stats memory by making the first call here */
>> + ret = vnic_dev_stats_dump(snic->vdev, &snic->stats);
>> + if (ret) {
>> + SNIC_HOST_ERR(snic->shost,
>> + "vnic_dev_stats_dump failed - x%x\n",
>> + ret);
>> + goto error_cleanup;
>> + }
>> +
>> + /* Clear LIF stats */
>> + vnic_dev_stats_clear(snic->vdev);
>> + ret = 0;
>> +
>> + return ret;
>> +
>> +error_cleanup:
>> + snic_free_vnic_res(snic);
>> +
>> + return ret;
>> +}
>> +
>> +int snic_get_vnic_resources_size(struct snic *snic)
>> +{
>> + unsigned int mem_size = 0;
>> +
>> + snic_get_res_counts(snic);
>> +
>> + /* add mem size for vnic stats structure */
>> + mem_size += sizeof(struct vnic_stats);
>> +
>> + /* add mem size for fw info */
>> + mem_size += sizeof(struct vnic_devcmd_fw_info);
>> +
>> + /* add mem size for dev cmd notify */
>> + mem_size += sizeof(struct vnic_devcmd_notify);
>> +
>> + pr_info(PFX "vNIC mem_size reqd: %d\n", mem_size);
>> +
>> + return mem_size;
>> +
>> +}
>> +
>> +void
>> +snic_log_q_error(struct snic *snic)
>> +{
>> + unsigned int i;
>> + u32 err_status;
>> +
>> + for (i = 0; i < snic->wq_count; i++) {
>> + err_status = ioread32(&snic->wq[i].ctrl->error_status);
>> + if (err_status)
>> + SNIC_HOST_ERR(snic->shost,
>> + "WQ[%d] error status %d\n",
>> + i,
>> + err_status);
>> + }
>> +} /* end of snic_log_q_error */
>> diff --git a/drivers/scsi/snic/snic_res.h b/drivers/scsi/snic/snic_res.h
>> new file mode 100644
>> index 0000000..f8f4e29
>> --- /dev/null
>> +++ b/drivers/scsi/snic/snic_res.h
>> @@ -0,0 +1,96 @@
>> +/*
>> + * 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_RES_H
>> +#define __SNIC_RES_H
>> +
>> +#include "snic_io.h"
>> +#include "wq_enet_desc.h"
>> +#include "vnic_wq.h"
>> +#include "snic_fwint.h"
>> +#include "vnic_cq_fw.h"
>> +
>> +static inline void
>> +snic_icmnd_init(struct snic_host_req *req, u32 cmnd_id, u32 host_id,
>>u64 ctx,
>> + u16 flags, u64 tgt_id, u8 *lun, u8 *scsi_cdb, u8 cdb_len,
>> + u32 data_len, u16 sg_cnt, u64 sgl_addr, u64 sns_addr_pa,
>> + u32 sense_len)
>> +{
>> + snic_io_hdr_enc(&req->hdr, SNIC_REQ_ICMND, 0, cmnd_id, host_id,
>>sg_cnt,
>> + ctx);
>> +
>> + req->u.icmnd.flags = flags;
>> + req->u.icmnd.tgt_id = tgt_id;
>> + memcpy(&req->u.icmnd.lun_id, lun, LUN_ADDR_LEN);
>> + req->u.icmnd.cdb_len = cdb_len;
>> + memset(req->u.icmnd.cdb, 0, SNIC_CDB_LEN);
>> + memcpy(req->u.icmnd.cdb, scsi_cdb, cdb_len);
>> + req->u.icmnd.data_len = data_len;
>> + req->u.icmnd.sg_addr = sgl_addr;
>> + req->u.icmnd.sense_len = sense_len;
>> + req->u.icmnd.sense_addr = sns_addr_pa;
>> +}
>> +
>> +static inline void
>> +snic_itmf_init(struct snic_host_req *req, u32 cmnd_id, u32 host_id,
>>u64 ctx,
>> + u16 flags, u32 req_id, u64 tgt_id, u8 *lun, u8 tm_type)
>> +{
>> + snic_io_hdr_enc(&req->hdr, SNIC_REQ_ITMF, 0, cmnd_id, host_id, 0,
>>ctx);
>> +
>> + req->u.itmf.tm_type = tm_type;
>> + req->u.itmf.flags = flags;
>> + req->u.itmf.req_id = req_id; /* valid only in abort, clear task */
>> + req->u.itmf.tgt_id = tgt_id;
>> + memcpy(&req->u.itmf.lun_id, lun, LUN_ADDR_LEN);
>> +}
>> +
>> +static inline void
>> +snic_queue_wq_eth_desc(struct vnic_wq *wq,
>> + void *os_buf,
>> + dma_addr_t dma_addr,
>> + unsigned int len,
>> + int vlan_tag_insert,
>> + unsigned int vlan_tag,
>> + int cq_entry)
>> +{
>> + struct wq_enet_desc *desc = vnic_wq_next_desc(wq);
>> +
>> + wq_enet_desc_enc(desc,
>> + (u64)dma_addr | VNIC_PADDR_TARGET,
>> + (u16)len,
>> + 0, /* mss_or_csum_offset */
>> + 0, /* fc_eof */
>> + 0, /* offload mode */
>> + 1, /* eop */
>> + (u8)cq_entry,
>> + 0, /* fcoe_encap */
>> + (u8)vlan_tag_insert,
>> + (u16)vlan_tag,
>> + 0 /* loopback */);
>> +
>> + vnic_wq_post(wq, os_buf, dma_addr, len, 1, 1);
>> +}
>> +
>> +struct snic;
>> +
>> +int snic_get_vnic_config(struct snic *);
>> +int snic_alloc_vnic_res(struct snic *);
>> +void snic_free_vnic_res(struct snic *);
>> +void snic_get_res_counts(struct snic *);
>> +void snic_log_q_error(struct snic *);
>> +int snic_get_vnic_resources_size(struct snic *);
>> +#endif /* __SNIC_RES_H */
>>
>As mentioned above. this whole infrastructure doesn't look as if it
>would be endian-safe. Is this intentional?
At this moment, the driver is supported for x86-64 (little endian)
architecture only.
>
>Cheers,
>
>Hannes
>--
>Dr. Hannes Reinecke zSeries & Storage
>h...@suse.de +49 911 74053 688
>SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
>GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton
>HRB 21284 (AG Nürnberg)
Thanks
Narsimhulu
>
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