/*-
* Copyright (c) 2017 Broadcom. All rights reserved.
* The term "Broadcom" refers to Broadcom Limited and/or its subsidiaries.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
/**
* @file
* OCS Linux SCSI API base driver implementation.
*/
/**
* @defgroup scsi_api_base SCSI Base Target/Initiator
*/
#include "ocs.h"
#include "ocs_els.h"
#include "ocs_scsi.h"
#if defined(OCS_ENABLE_VPD_SUPPORT)
#include "ocs_vpd.h"
#endif
#include "ocs_utils.h"
#include "ocs_device.h"
#define SCSI_IOFMT "[%04x][i:%0*x t:%0*x h:%04x]"
#define SCSI_ITT_SIZE(ocs) ((ocs->ocs_xport == OCS_XPORT_FC) ? 4 : 8)
#define SCSI_IOFMT_ARGS(io) io->instance_index, SCSI_ITT_SIZE(io->ocs), io->init_task_tag, SCSI_ITT_SIZE(io->ocs), io->tgt_task_tag, io->hw_tag
#define enable_tsend_auto_resp(ocs) ((ocs->ctrlmask & OCS_CTRLMASK_XPORT_DISABLE_AUTORSP_TSEND) == 0)
#define enable_treceive_auto_resp(ocs) ((ocs->ctrlmask & OCS_CTRLMASK_XPORT_DISABLE_AUTORSP_TRECEIVE) == 0)
#define scsi_io_printf(io, fmt, ...) ocs_log_info(io->ocs, "[%s]" SCSI_IOFMT fmt, \
io->node->display_name, SCSI_IOFMT_ARGS(io), ##__VA_ARGS__)
#define scsi_io_trace(io, fmt, ...) \
do { \
if (OCS_LOG_ENABLE_SCSI_TRACE(io->ocs)) \
scsi_io_printf(io, fmt, ##__VA_ARGS__); \
} while (0)
#define scsi_log(ocs, fmt, ...) \
do { \
if (OCS_LOG_ENABLE_SCSI_TRACE(ocs)) \
ocs_log_info(ocs, fmt, ##__VA_ARGS__); \
} while (0)
static int32_t ocs_target_send_bls_resp(ocs_io_t *io, ocs_scsi_io_cb_t cb, void *arg);
static int32_t ocs_scsi_abort_io_cb(struct ocs_hw_io_s *hio, ocs_remote_node_t *rnode, uint32_t len, int32_t status,
uint32_t ext, void *arg);
static void ocs_scsi_io_free_ovfl(ocs_io_t *io);
static uint32_t ocs_scsi_count_sgls(ocs_hw_dif_info_t *hw_dif, ocs_scsi_sgl_t *sgl, uint32_t sgl_count);
static int ocs_scsi_dif_guard_is_crc(uint8_t direction, ocs_hw_dif_info_t *dif_info);
static ocs_scsi_io_status_e ocs_scsi_dif_check_unknown(ocs_io_t *io, uint32_t length, uint32_t check_length, int is_crc);
static uint32_t ocs_scsi_dif_check_guard(ocs_hw_dif_info_t *dif_info, ocs_scsi_vaddr_len_t addrlen[],
uint32_t addrlen_count, ocs_dif_t *dif, int is_crc);
static uint32_t ocs_scsi_dif_check_app_tag(ocs_t *ocs, ocs_hw_dif_info_t *dif_info, uint16_t exp_app_tag, ocs_dif_t *dif);
static uint32_t ocs_scsi_dif_check_ref_tag(ocs_t *ocs, ocs_hw_dif_info_t *dif_info, uint32_t exp_ref_tag, ocs_dif_t *dif);
static int32_t ocs_scsi_convert_dif_info(ocs_t *ocs, ocs_scsi_dif_info_t *scsi_dif_info,
ocs_hw_dif_info_t *hw_dif_info);
static int32_t ocs_scsi_io_dispatch_hw_io(ocs_io_t *io, ocs_hw_io_t *hio);
static int32_t ocs_scsi_io_dispatch_no_hw_io(ocs_io_t *io);
static void _ocs_scsi_io_free(void *arg);
/**
* @ingroup scsi_api_base
* @brief Returns a big-endian 32-bit value given a pointer.
*
* @param p Pointer to the 32-bit big-endian location.
*
* @return Returns the byte-swapped 32-bit value.
*/
static inline uint32_t
ocs_fc_getbe32(void *p)
{
return ocs_be32toh(*((uint32_t*)p));
}
/**
* @ingroup scsi_api_base
* @brief Enable IO allocation.
*
* @par Description
* The SCSI and Transport IO allocation functions are enabled. If the allocation functions
* are not enabled, then calls to ocs_scsi_io_alloc() (and ocs_els_io_alloc() for FC) will
* fail.
*
* @param node Pointer to node object.
*
* @return None.
*/
void
ocs_scsi_io_alloc_enable(ocs_node_t *node)
{
ocs_assert(node != NULL);
ocs_lock(&node->active_ios_lock);
node->io_alloc_enabled = TRUE;
ocs_unlock(&node->active_ios_lock);
}
/**
* @ingroup scsi_api_base
* @brief Disable IO allocation
*
* @par Description
* The SCSI and Transport IO allocation functions are disabled. If the allocation functions
* are not enabled, then calls to ocs_scsi_io_alloc() (and ocs_els_io_alloc() for FC) will
* fail.
*
* @param node Pointer to node object
*
* @return None.
*/
void
ocs_scsi_io_alloc_disable(ocs_node_t *node)
{
ocs_assert(node != NULL);
ocs_lock(&node->active_ios_lock);
node->io_alloc_enabled = FALSE;
ocs_unlock(&node->active_ios_lock);
}
/**
* @ingroup scsi_api_base
* @brief Allocate a SCSI IO context.
*
* @par Description
* A SCSI IO context is allocated and associated with a @c node. This function
* is called by an initiator-client when issuing SCSI commands to remote
* target devices. On completion, ocs_scsi_io_free() is called.
* @n @n
* The returned ocs_io_t structure has an element of type ocs_scsi_ini_io_t named
* "ini_io" that is declared and used by an initiator-client for private information.
*
* @param node Pointer to the associated node structure.
* @param role Role for IO (originator/responder).
*
* @return Returns the pointer to the IO context, or NULL.
*
*/
ocs_io_t *
ocs_scsi_io_alloc(ocs_node_t *node, ocs_scsi_io_role_e role)
{
ocs_t *ocs;
ocs_xport_t *xport;
ocs_io_t *io;
ocs_assert(node, NULL);
ocs_assert(node->ocs, NULL);
ocs = node->ocs;
ocs_assert(ocs->xport, NULL);
xport = ocs->xport;
ocs_lock(&node->active_ios_lock);
if (!node->io_alloc_enabled) {
ocs_unlock(&node->active_ios_lock);
return NULL;
}
io = ocs_io_alloc(ocs);
if (io == NULL) {
ocs_atomic_add_return(&xport->io_alloc_failed_count, 1);
ocs_unlock(&node->active_ios_lock);
return NULL;
}
/* initialize refcount */
ocs_ref_init(&io->ref, _ocs_scsi_io_free, io);
if (io->hio != NULL) {
ocs_log_err(node->ocs, "assertion failed: io->hio is not NULL\n");
ocs_unlock(&node->active_ios_lock);
return NULL;
}
/* set generic fields */
io->ocs = ocs;
io->node = node;
/* set type and name */
io->io_type = OCS_IO_TYPE_IO;
io->display_name = "scsi_io";
switch (role) {
case OCS_SCSI_IO_ROLE_ORIGINATOR:
io->cmd_ini = TRUE;
io->cmd_tgt = FALSE;
break;
case OCS_SCSI_IO_ROLE_RESPONDER:
io->cmd_ini = FALSE;
io->cmd_tgt = TRUE;
break;
}
/* Add to node's active_ios list */
ocs_list_add_tail(&node->active_ios, io);
ocs_unlock(&node->active_ios_lock);
return io;
}
/**
* @ingroup scsi_api_base
* @brief Free a SCSI IO context (internal).
*
* @par Description
* The IO context previously allocated using ocs_scsi_io_alloc()
* is freed. This is called from within the transport layer,
* when the reference count goes to zero.
*
* @param arg Pointer to the IO context.
*
* @return None.
*/
static void
_ocs_scsi_io_free(void *arg)
{
ocs_io_t *io = (ocs_io_t *)arg;
ocs_t *ocs = io->ocs;
ocs_node_t *node = io->node;
int send_empty_event;
ocs_assert(io != NULL);
scsi_io_trace(io, "freeing io 0x%p %s\n", io, io->display_name);
ocs_assert(ocs_io_busy(io));
ocs_lock(&node->active_ios_lock);
ocs_list_remove(&node->active_ios, io);
send_empty_event = (!node->io_alloc_enabled) && ocs_list_empty(&node->active_ios);
ocs_unlock(&node->active_ios_lock);
if (send_empty_event) {
ocs_node_post_event(node, OCS_EVT_NODE_ACTIVE_IO_LIST_EMPTY, NULL);
}
io->node = NULL;
ocs_io_free(ocs, io);
}
/**
* @ingroup scsi_api_base
* @brief Free a SCSI IO context.
*
* @par Description
* The IO context previously allocated using ocs_scsi_io_alloc() is freed.
*
* @param io Pointer to the IO context.
*
* @return None.
*/
void
ocs_scsi_io_free(ocs_io_t *io)
{
scsi_io_trace(io, "freeing io 0x%p %s\n", io, io->display_name);
ocs_assert(ocs_ref_read_count(&io->ref) > 0);
ocs_ref_put(&io->ref); /* ocs_ref_get(): ocs_scsi_io_alloc() */
}
static int32_t
ocs_scsi_send_io(ocs_hw_io_type_e type, ocs_node_t *node, ocs_io_t *io, uint64_t lun,
ocs_scsi_tmf_cmd_e tmf, uint8_t *cdb, uint32_t cdb_len,
ocs_scsi_dif_info_t *dif_info,
ocs_scsi_sgl_t *sgl, uint32_t sgl_count, uint32_t wire_len, uint32_t first_burst,
ocs_scsi_rsp_io_cb_t cb, void *arg);
/**
* @brief Target response completion callback.
*
* @par Description
* Function is called upon the completion of a target IO request.
*
* @param hio Pointer to the HW IO structure.
* @param rnode Remote node associated with the IO that is completing.
* @param length Length of the response payload.
* @param status Completion status.
* @param ext_status Extended completion status.
* @param app Application-specific data (generally a pointer to the IO context).
*
* @return None.
*/
static void
ocs_target_io_cb(ocs_hw_io_t *hio, ocs_remote_node_t *rnode, uint32_t length,
int32_t status, uint32_t ext_status, void *app)
{
ocs_io_t *io = app;
ocs_t *ocs;
ocs_scsi_io_status_e scsi_status = OCS_SCSI_STATUS_GOOD;
uint16_t additional_length;
uint8_t edir;
uint8_t tdpv;
ocs_hw_dif_info_t *dif_info = &io->hw_dif;
int is_crc;
ocs_assert(io);
scsi_io_trace(io, "status x%x ext_status x%x\n", status, ext_status);
ocs = io->ocs;
ocs_assert(ocs);
ocs_scsi_io_free_ovfl(io);
io->transferred += length;
/* Call target server completion */
if (io->scsi_tgt_cb) {
ocs_scsi_io_cb_t cb = io->scsi_tgt_cb;
uint32_t flags = 0;
/* Clear the callback before invoking the callback */
io->scsi_tgt_cb = NULL;
/* if status was good, and auto-good-response was set, then callback
* target-server with IO_CMPL_RSP_SENT, otherwise send IO_CMPL
*/
if ((status == 0) && (io->auto_resp))
flags |= OCS_SCSI_IO_CMPL_RSP_SENT;
else
flags |= OCS_SCSI_IO_CMPL;
switch (status) {
case SLI4_FC_WCQE_STATUS_SUCCESS:
scsi_status = OCS_SCSI_STATUS_GOOD;
break;
case SLI4_FC_WCQE_STATUS_DI_ERROR:
if (ext_status & SLI4_FC_DI_ERROR_GE) {
scsi_status = OCS_SCSI_STATUS_DIF_GUARD_ERROR;
} else if (ext_status & SLI4_FC_DI_ERROR_AE) {
scsi_status = OCS_SCSI_STATUS_DIF_APP_TAG_ERROR;
} else if (ext_status & SLI4_FC_DI_ERROR_RE) {
scsi_status = OCS_SCSI_STATUS_DIF_REF_TAG_ERROR;
} else {
additional_length = ((ext_status >> 16) & 0xFFFF);
/* Capture the EDIR and TDPV bits as 0 or 1 for easier printing. */
edir = !!(ext_status & SLI4_FC_DI_ERROR_EDIR);
tdpv = !!(ext_status & SLI4_FC_DI_ERROR_TDPV);
is_crc = ocs_scsi_dif_guard_is_crc(edir, dif_info);
if (edir == 0) {
/* For reads, we have everything in memory. Start checking from beginning. */
scsi_status = ocs_scsi_dif_check_unknown(io, 0, io->wire_len, is_crc);
} else {
/* For writes, use the additional length to determine where to look for the error.
* The additional_length field is set to 0 if it is not supported.
* The additional length field is valid if:
* . additional_length is not zero
* . Total Data Placed is valid
* . Error Direction is RX (1)
* . Operation is a pass thru (CRC or CKSUM on IN, and CRC or CHKSUM on OUT) (all pass-thru cases except raw)
*/
if ((additional_length != 0) && (tdpv != 0) &&
(dif_info->dif == SLI4_DIF_PASS_THROUGH) && (dif_info->dif_oper != OCS_HW_SGE_DIF_OP_IN_RAW_OUT_RAW) ) {
scsi_status = ocs_scsi_dif_check_unknown(io, length, additional_length, is_crc);
} else {
/* If we can't do additional checking, then fall-back to guard error */
scsi_status = OCS_SCSI_STATUS_DIF_GUARD_ERROR;
}
}
}
break;
case SLI4_FC_WCQE_STATUS_LOCAL_REJECT:
switch (ext_status) {
case SLI4_FC_LOCAL_REJECT_INVALID_RELOFFSET:
case SLI4_FC_LOCAL_REJECT_ABORT_REQUESTED:
scsi_status = OCS_SCSI_STATUS_ABORTED;
break;
case SLI4_FC_LOCAL_REJECT_INVALID_RPI:
scsi_status = OCS_SCSI_STATUS_NEXUS_LOST;
break;
case SLI4_FC_LOCAL_REJECT_NO_XRI:
scsi_status = OCS_SCSI_STATUS_NO_IO;
break;
default:
/* TODO: we have seen 0x0d (TX_DMA_FAILED error) */
scsi_status = OCS_SCSI_STATUS_ERROR;
break;
}
break;
case SLI4_FC_WCQE_STATUS_TARGET_WQE_TIMEOUT:
/* target IO timed out */
scsi_status = OCS_SCSI_STATUS_TIMEDOUT_AND_ABORTED;
break;
case SLI4_FC_WCQE_STATUS_SHUTDOWN:
/* Target IO cancelled by HW */
scsi_status = OCS_SCSI_STATUS_SHUTDOWN;
break;
default:
scsi_status = OCS_SCSI_STATUS_ERROR;
break;
}
cb(io, scsi_status, flags, io->scsi_tgt_cb_arg);
}
ocs_scsi_check_pending(ocs);
}
/**
* @brief Determine if an IO is using CRC for DIF guard format.
*
* @param direction IO direction: 1 for write, 0 for read.
* @param dif_info Pointer to HW DIF info data.
*
* @return Returns TRUE if using CRC, FALSE if not.
*/
static int
ocs_scsi_dif_guard_is_crc(uint8_t direction, ocs_hw_dif_info_t *dif_info)
{
int is_crc;
if (direction) {
/* For writes, check if operation is "OUT_CRC" or not */
switch(dif_info->dif_oper) {
case OCS_HW_SGE_DIF_OP_IN_NODIF_OUT_CRC:
case OCS_HW_SGE_DIF_OP_IN_CRC_OUT_CRC:
case OCS_HW_SGE_DIF_OP_IN_CHKSUM_OUT_CRC:
is_crc = TRUE;
break;
default:
is_crc = FALSE;
break;
}
} else {
/* For reads, check if operation is "IN_CRC" or not */
switch(dif_info->dif_oper) {
case OCS_HW_SGE_DIF_OP_IN_CRC_OUT_NODIF:
case OCS_HW_SGE_DIF_OP_IN_CRC_OUT_CRC:
case OCS_HW_SGE_DIF_OP_IN_CRC_OUT_CHKSUM:
is_crc = TRUE;
break;
default:
is_crc = FALSE;
break;
}
}
return is_crc;
}
/**
* @brief Check a block and DIF data, computing the appropriate SCSI status
*
* @par Description
* This function is used to check blocks and DIF when given an unknown DIF
* status using the following logic:
*
* Given the address of the last good block, and a length of bytes that includes
* the block with the DIF error, find the bad block. If a block is found with an
* app_tag or ref_tag error, then return the appropriate error. No block is expected
* to have a block guard error since hardware "fixes" the crc. So if no block in the
* range of blocks has an error, then it is presumed to be a BLOCK GUARD error.
*
* @param io Pointer to the IO object.
* @param length Length of bytes covering the good blocks.
* @param check_length Length of bytes that covers the bad block.
* @param is_crc True if guard is using CRC format.
*
* @return Returns SCSI status.
*/
static ocs_scsi_io_status_e
ocs_scsi_dif_check_unknown(ocs_io_t *io, uint32_t length, uint32_t check_length, int is_crc)
{
uint32_t i;
ocs_t *ocs = io->ocs;
ocs_hw_dif_info_t *dif_info = &io->hw_dif;
ocs_scsi_io_status_e scsi_status = OCS_SCSI_STATUS_DIF_GUARD_ERROR;
uint32_t blocksize; /* data block size */
uint64_t first_check_block; /* first block following total data placed */
uint64_t last_check_block; /* last block to check */
uint32_t check_count; /* count of blocks to check */
ocs_scsi_vaddr_len_t addrlen[4]; /* address-length pairs returned from target */
int32_t addrlen_count; /* count of address-length pairs */
ocs_dif_t *dif; /* pointer to DIF block returned from target */
ocs_scsi_dif_info_t scsi_dif_info = io->scsi_dif_info;
blocksize = ocs_hw_dif_mem_blocksize(&io->hw_dif, TRUE);
first_check_block = length / blocksize;
last_check_block = ((length + check_length) / blocksize);
check_count = last_check_block - first_check_block;
ocs_log_debug(ocs, "blocksize %d first check_block %" PRId64 " last_check_block %" PRId64 " check_count %d\n",
blocksize, first_check_block, last_check_block, check_count);
for (i = first_check_block; i < last_check_block; i++) {
addrlen_count = ocs_scsi_get_block_vaddr(io, (scsi_dif_info.lba + i), addrlen, ARRAY_SIZE(addrlen), (void**) &dif);
if (addrlen_count < 0) {
ocs_log_test(ocs, "ocs_scsi_get_block_vaddr() failed: %d\n", addrlen_count);
scsi_status = OCS_SCSI_STATUS_DIF_UNKNOWN_ERROR;
break;
}
if (! ocs_scsi_dif_check_guard(dif_info, addrlen, addrlen_count, dif, is_crc)) {
ocs_log_debug(ocs, "block guard check error, lba %" PRId64 "\n", scsi_dif_info.lba + i);
scsi_status = OCS_SCSI_STATUS_DIF_GUARD_ERROR;
break;
}
if (! ocs_scsi_dif_check_app_tag(ocs, dif_info, scsi_dif_info.app_tag, dif)) {
ocs_log_debug(ocs, "app tag check error, lba %" PRId64 "\n", scsi_dif_info.lba + i);
scsi_status = OCS_SCSI_STATUS_DIF_APP_TAG_ERROR;
break;
}
if (! ocs_scsi_dif_check_ref_tag(ocs, dif_info, (scsi_dif_info.ref_tag + i), dif)) {
ocs_log_debug(ocs, "ref tag check error, lba %" PRId64 "\n", scsi_dif_info.lba + i);
scsi_status = OCS_SCSI_STATUS_DIF_REF_TAG_ERROR;
break;
}
}
return scsi_status;
}
/**
* @brief Check the block guard of block data
*
* @par Description
* Using the dif_info for the transfer, check the block guard value.
*
* @param dif_info Pointer to HW DIF info data.
* @param addrlen Array of address length pairs.
* @param addrlen_count Number of entries in the addrlen[] array.
* @param dif Pointer to the DIF data block being checked.
* @param is_crc True if guard is using CRC format.
*
* @return Returns TRUE if block guard check is ok.
*/
static uint32_t
ocs_scsi_dif_check_guard(ocs_hw_dif_info_t *dif_info, ocs_scsi_vaddr_len_t addrlen[], uint32_t addrlen_count,
ocs_dif_t *dif, int is_crc)
{
uint16_t crc = dif_info->dif_seed;
uint32_t i;
uint16_t checksum;
if ((dif == NULL) || !dif_info->check_guard) {
return TRUE;
}
if (is_crc) {
for (i = 0; i < addrlen_count; i++) {
crc = ocs_scsi_dif_calc_crc(addrlen[i].vaddr, addrlen[i].length, crc);
}
return (crc == ocs_be16toh(dif->crc));
} else {
checksum = ocs_scsi_dif_calc_checksum(addrlen, addrlen_count);
return (checksum == dif->crc);
}
}
/**
* @brief Check the app tag of dif data
*
* @par Description
* Using the dif_info for the transfer, check the app tag.
*
* @param ocs Pointer to the ocs structure for logging.
* @param dif_info Pointer to HW DIF info data.
* @param exp_app_tag The value the app tag is expected to be.
* @param dif Pointer to the DIF data block being checked.
*
* @return Returns TRUE if app tag check is ok.
*/
static uint32_t
ocs_scsi_dif_check_app_tag(ocs_t *ocs, ocs_hw_dif_info_t *dif_info, uint16_t exp_app_tag, ocs_dif_t *dif)
{
if ((dif == NULL) || !dif_info->check_app_tag) {
return TRUE;
}
ocs_log_debug(ocs, "expected app tag 0x%x, actual 0x%x\n",
exp_app_tag, ocs_be16toh(dif->app_tag));
return (exp_app_tag == ocs_be16toh(dif->app_tag));
}
/**
* @brief Check the ref tag of dif data
*
* @par Description
* Using the dif_info for the transfer, check the app tag.
*
* @param ocs Pointer to the ocs structure for logging.
* @param dif_info Pointer to HW DIF info data.
* @param exp_ref_tag The value the ref tag is expected to be.
* @param dif Pointer to the DIF data block being checked.
*
* @return Returns TRUE if ref tag check is ok.
*/
static uint32_t
ocs_scsi_dif_check_ref_tag(ocs_t *ocs, ocs_hw_dif_info_t *dif_info, uint32_t exp_ref_tag, ocs_dif_t *dif)
{
if ((dif == NULL) || !dif_info->check_ref_tag) {
return TRUE;
}
if (exp_ref_tag != ocs_be32toh(dif->ref_tag)) {
ocs_log_debug(ocs, "expected ref tag 0x%x, actual 0x%x\n",
exp_ref_tag, ocs_be32toh(dif->ref_tag));
return FALSE;
} else {
return TRUE;
}
}
/**
* @brief Return count of SGE's required for request
*
* @par Description
* An accurate count of SGEs is computed and returned.
*
* @param hw_dif Pointer to HW dif information.
* @param sgl Pointer to SGL from back end.
* @param sgl_count Count of SGEs in SGL.
*
* @return Count of SGEs.
*/
static uint32_t
ocs_scsi_count_sgls(ocs_hw_dif_info_t *hw_dif, ocs_scsi_sgl_t *sgl, uint32_t sgl_count)
{
uint32_t count = 0;
uint32_t i;
/* Convert DIF Information */
if (hw_dif->dif_oper != OCS_HW_DIF_OPER_DISABLED) {
/* If we're not DIF separate, then emit a seed SGE */
if (!hw_dif->dif_separate) {
count++;
}
for (i = 0; i < sgl_count; i++) {
/* If DIF is enabled, and DIF is separate, then append a SEED then DIF SGE */
if (hw_dif->dif_separate) {
count += 2;
}
count++;
}
} else {
count = sgl_count;
}
return count;
}
static int32_t
ocs_scsi_build_sgls(ocs_hw_t *hw, ocs_hw_io_t *hio, ocs_hw_dif_info_t *hw_dif, ocs_scsi_sgl_t *sgl, uint32_t sgl_count, ocs_hw_io_type_e type)
{
int32_t rc;
uint32_t i;
ocs_t *ocs = hw->os;
uint32_t blocksize = 0;
uint32_t blockcount;
ocs_assert(hio, -1);
/* Initialize HW SGL */
rc = ocs_hw_io_init_sges(hw, hio, type);
if (rc) {
ocs_log_err(ocs, "ocs_hw_io_init_sges failed: %d\n", rc);
return -1;
}
/* Convert DIF Information */
if (hw_dif->dif_oper != OCS_HW_DIF_OPER_DISABLED) {
/* If we're not DIF separate, then emit a seed SGE */
if (!hw_dif->dif_separate) {
rc = ocs_hw_io_add_seed_sge(hw, hio, hw_dif);
if (rc) {
return rc;
}
}
/* if we are doing DIF separate, then figure out the block size so that we
* can update the ref tag in the DIF seed SGE. Also verify that the
* the sgl lengths are all multiples of the blocksize
*/
if (hw_dif->dif_separate) {
switch(hw_dif->blk_size) {
case OCS_HW_DIF_BK_SIZE_512: blocksize = 512; break;
case OCS_HW_DIF_BK_SIZE_1024: blocksize = 1024; break;
case OCS_HW_DIF_BK_SIZE_2048: blocksize = 2048; break;
case OCS_HW_DIF_BK_SIZE_4096: blocksize = 4096; break;
case OCS_HW_DIF_BK_SIZE_520: blocksize = 520; break;
case OCS_HW_DIF_BK_SIZE_4104: blocksize = 4104; break;
default:
ocs_log_test(hw->os, "Inavlid hw_dif blocksize %d\n", hw_dif->blk_size);
return -1;
}
for (i = 0; i < sgl_count; i++) {
if ((sgl[i].len % blocksize) != 0) {
ocs_log_test(hw->os, "sgl[%d] len of %ld is not multiple of blocksize\n",
i, sgl[i].len);
return -1;
}
}
}
for (i = 0; i < sgl_count; i++) {
ocs_assert(sgl[i].addr, -1);
ocs_assert(sgl[i].len, -1);
/* If DIF is enabled, and DIF is separate, then append a SEED then DIF SGE */
if (hw_dif->dif_separate) {
rc = ocs_hw_io_add_seed_sge(hw, hio, hw_dif);
if (rc) {
return rc;
}
rc = ocs_hw_io_add_dif_sge(hw, hio, sgl[i].dif_addr);
if (rc) {
return rc;
}
/* Update the ref_tag for the next DIF seed SGE */
blockcount = sgl[i].len / blocksize;
if (hw_dif->dif_oper == OCS_HW_DIF_OPER_INSERT) {
hw_dif->ref_tag_repl += blockcount;
} else {
hw_dif->ref_tag_cmp += blockcount;
}
}
/* Add data SGE */
rc = ocs_hw_io_add_sge(hw, hio, sgl[i].addr, sgl[i].len);
if (rc) {
ocs_log_err(ocs, "ocs_hw_io_add_sge failed: count=%d rc=%d\n",
sgl_count, rc);
return rc;
}
}
} else {
for (i = 0; i < sgl_count; i++) {
ocs_assert(sgl[i].addr, -1);
ocs_assert(sgl[i].len, -1);
/* Add data SGE */
rc = ocs_hw_io_add_sge(hw, hio, sgl[i].addr, sgl[i].len);
if (rc) {
ocs_log_err(ocs, "ocs_hw_io_add_sge failed: count=%d rc=%d\n",
sgl_count, rc);
return rc;
}
}
}
return 0;
}
/**
* @ingroup scsi_api_base
* @brief Convert SCSI API T10 DIF information into the FC HW format.
*
* @param ocs Pointer to the ocs structure for logging.
* @param scsi_dif_info Pointer to the SCSI API T10 DIF fields.
* @param hw_dif_info Pointer to the FC HW API T10 DIF fields.
*
* @return Returns 0 on success, or a negative error code value on failure.
*/
static int32_t
ocs_scsi_convert_dif_info(ocs_t *ocs, ocs_scsi_dif_info_t *scsi_dif_info, ocs_hw_dif_info_t *hw_dif_info)
{
uint32_t dif_seed;
ocs_memset(hw_dif_info, 0, sizeof(ocs_hw_dif_info_t));
if (scsi_dif_info == NULL) {
hw_dif_info->dif_oper = OCS_HW_DIF_OPER_DISABLED;
hw_dif_info->blk_size = OCS_HW_DIF_BK_SIZE_NA;
return 0;
}
/* Convert the DIF operation */
switch(scsi_dif_info->dif_oper) {
case OCS_SCSI_DIF_OPER_IN_NODIF_OUT_CRC:
hw_dif_info->dif_oper = OCS_HW_SGE_DIF_OP_IN_NODIF_OUT_CRC;
hw_dif_info->dif = SLI4_DIF_INSERT;
break;
case OCS_SCSI_DIF_OPER_IN_CRC_OUT_NODIF:
hw_dif_info->dif_oper = OCS_HW_SGE_DIF_OP_IN_CRC_OUT_NODIF;
hw_dif_info->dif = SLI4_DIF_STRIP;
break;
case OCS_SCSI_DIF_OPER_IN_NODIF_OUT_CHKSUM:
hw_dif_info->dif_oper = OCS_HW_SGE_DIF_OP_IN_NODIF_OUT_CHKSUM;
hw_dif_info->dif = SLI4_DIF_INSERT;
break;
case OCS_SCSI_DIF_OPER_IN_CHKSUM_OUT_NODIF:
hw_dif_info->dif_oper = OCS_HW_SGE_DIF_OP_IN_CHKSUM_OUT_NODIF;
hw_dif_info->dif = SLI4_DIF_STRIP;
break;
case OCS_SCSI_DIF_OPER_IN_CRC_OUT_CRC:
hw_dif_info->dif_oper = OCS_HW_SGE_DIF_OP_IN_CRC_OUT_CRC;
hw_dif_info->dif = SLI4_DIF_PASS_THROUGH;
break;
case OCS_SCSI_DIF_OPER_IN_CHKSUM_OUT_CHKSUM:
hw_dif_info->dif_oper = OCS_HW_SGE_DIF_OP_IN_CHKSUM_OUT_CHKSUM;
hw_dif_info->dif = SLI4_DIF_PASS_THROUGH;
break;
case OCS_SCSI_DIF_OPER_IN_CRC_OUT_CHKSUM:
hw_dif_info->dif_oper = OCS_HW_SGE_DIF_OP_IN_CRC_OUT_CHKSUM;
hw_dif_info->dif = SLI4_DIF_PASS_THROUGH;
break;
case OCS_SCSI_DIF_OPER_IN_CHKSUM_OUT_CRC:
hw_dif_info->dif_oper = OCS_HW_SGE_DIF_OP_IN_CHKSUM_OUT_CRC;
hw_dif_info->dif = SLI4_DIF_PASS_THROUGH;
break;
case OCS_SCSI_DIF_OPER_IN_RAW_OUT_RAW:
hw_dif_info->dif_oper = OCS_HW_SGE_DIF_OP_IN_RAW_OUT_RAW;
hw_dif_info->dif = SLI4_DIF_PASS_THROUGH;
break;
default:
ocs_log_test(ocs, "unhandled SCSI DIF operation %d\n",
scsi_dif_info->dif_oper);
return -1;
}
switch(scsi_dif_info->blk_size) {
case OCS_SCSI_DIF_BK_SIZE_512:
hw_dif_info->blk_size = OCS_HW_DIF_BK_SIZE_512;
break;
case OCS_SCSI_DIF_BK_SIZE_1024:
hw_dif_info->blk_size = OCS_HW_DIF_BK_SIZE_1024;
break;
case OCS_SCSI_DIF_BK_SIZE_2048:
hw_dif_info->blk_size = OCS_HW_DIF_BK_SIZE_2048;
break;
case OCS_SCSI_DIF_BK_SIZE_4096:
hw_dif_info->blk_size = OCS_HW_DIF_BK_SIZE_4096;
break;
case OCS_SCSI_DIF_BK_SIZE_520:
hw_dif_info->blk_size = OCS_HW_DIF_BK_SIZE_520;
break;
case OCS_SCSI_DIF_BK_SIZE_4104:
hw_dif_info->blk_size = OCS_HW_DIF_BK_SIZE_4104;
break;
default:
ocs_log_test(ocs, "unhandled SCSI DIF block size %d\n",
scsi_dif_info->blk_size);
return -1;
}
/* If the operation is an INSERT the tags provided are the ones that should be
* inserted, otherwise they're the ones to be checked against. */
if (hw_dif_info->dif == SLI4_DIF_INSERT ) {
hw_dif_info->ref_tag_repl = scsi_dif_info->ref_tag;
hw_dif_info->app_tag_repl = scsi_dif_info->app_tag;
} else {
hw_dif_info->ref_tag_cmp = scsi_dif_info->ref_tag;
hw_dif_info->app_tag_cmp = scsi_dif_info->app_tag;
}
hw_dif_info->check_ref_tag = scsi_dif_info->check_ref_tag;
hw_dif_info->check_app_tag = scsi_dif_info->check_app_tag;
hw_dif_info->check_guard = scsi_dif_info->check_guard;
hw_dif_info->auto_incr_ref_tag = 1;
hw_dif_info->dif_separate = scsi_dif_info->dif_separate;
hw_dif_info->disable_app_ffff = scsi_dif_info->disable_app_ffff;
hw_dif_info->disable_app_ref_ffff = scsi_dif_info->disable_app_ref_ffff;
ocs_hw_get(&ocs->hw, OCS_HW_DIF_SEED, &dif_seed);
hw_dif_info->dif_seed = dif_seed;
return 0;
}
/**
* @ingroup scsi_api_base
* @brief This function logs the SGLs for an IO.
*
* @param io Pointer to the IO context.
*/
static void ocs_log_sgl(ocs_io_t *io)
{
ocs_hw_io_t *hio = io->hio;
sli4_sge_t *data = NULL;
uint32_t *dword = NULL;
uint32_t i;
uint32_t n_sge;
scsi_io_trace(io, "def_sgl at 0x%x 0x%08x\n",
ocs_addr32_hi(hio->def_sgl.phys),
ocs_addr32_lo(hio->def_sgl.phys));
n_sge = (hio->sgl == &hio->def_sgl ? hio->n_sge : hio->def_sgl_count);
for (i = 0, data = hio->def_sgl.virt; i < n_sge; i++, data++) {
dword = (uint32_t*)data;
scsi_io_trace(io, "SGL %2d 0x%08x 0x%08x 0x%08x 0x%08x\n",
i, dword[0], dword[1], dword[2], dword[3]);
if (dword[2] & (1U << 31)) {
break;
}
}
if (hio->ovfl_sgl != NULL &&
hio->sgl == hio->ovfl_sgl) {
scsi_io_trace(io, "Overflow at 0x%x 0x%08x\n",
ocs_addr32_hi(hio->ovfl_sgl->phys),
ocs_addr32_lo(hio->ovfl_sgl->phys));
for (i = 0, data = hio->ovfl_sgl->virt; i < hio->n_sge; i++, data++) {
dword = (uint32_t*)data;
scsi_io_trace(io, "SGL %2d 0x%08x 0x%08x 0x%08x 0x%08x\n",
i, dword[0], dword[1], dword[2], dword[3]);
if (dword[2] & (1U << 31)) {
break;
}
}
}
}
/**
* @brief Check pending error asynchronous callback function.
*
* @par Description
* Invoke the HW callback function for a given IO. This function is called
* from the NOP mailbox completion context.
*
* @param hw Pointer to HW object.
* @param status Completion status.
* @param mqe Mailbox completion queue entry.
* @param arg General purpose argument.
*
* @return Returns 0.
*/
static int32_t
ocs_scsi_check_pending_async_cb(ocs_hw_t *hw, int32_t status, uint8_t *mqe, void *arg)
{
ocs_io_t *io = arg;
if (io != NULL) {
if (io->hw_cb != NULL) {
ocs_hw_done_t cb = io->hw_cb;
io->hw_cb = NULL;
cb(io->hio, NULL, 0, SLI4_FC_WCQE_STATUS_DISPATCH_ERROR, 0, io);
}
}
return 0;
}
/**
* @brief Check for pending IOs to dispatch.
*
* @par Description
* If there are IOs on the pending list, and a HW IO is available, then
* dispatch the IOs.
*
* @param ocs Pointer to the OCS structure.
*
* @return None.
*/
void
ocs_scsi_check_pending(ocs_t *ocs)
{
ocs_xport_t *xport = ocs->xport;
ocs_io_t *io;
ocs_hw_io_t *hio;
int32_t status;
int count = 0;
int dispatch;
/* Guard against recursion */
if (ocs_atomic_add_return(&xport->io_pending_recursing, 1)) {
/* This function is already running. Decrement and return. */
ocs_atomic_sub_return(&xport->io_pending_recursing, 1);
return;
}
do {
ocs_lock(&xport->io_pending_lock);
status = 0;
hio = NULL;
io = ocs_list_remove_head(&xport->io_pending_list);
if (io != NULL) {
if (io->io_type == OCS_IO_TYPE_ABORT) {
hio = NULL;
} else {
hio = ocs_hw_io_alloc(&ocs->hw);
if (hio == NULL) {
/*
* No HW IO available.
* Put IO back on the front of pending list
*/
ocs_list_add_head(&xport->io_pending_list, io);
io = NULL;
} else {
hio->eq = io->hw_priv;
}
}
}
/* Must drop the lock before dispatching the IO */
ocs_unlock(&xport->io_pending_lock);
if (io != NULL) {
count++;
/*
* We pulled an IO off the pending list,
* and either got an HW IO or don't need one
*/
ocs_atomic_sub_return(&xport->io_pending_count, 1);
if (hio == NULL) {
status = ocs_scsi_io_dispatch_no_hw_io(io);
} else {
status = ocs_scsi_io_dispatch_hw_io(io, hio);
}
if (status) {
/*
* Invoke the HW callback, but do so in the separate execution context,
* provided by the NOP mailbox completion processing context by using
* ocs_hw_async_call()
*/
if (ocs_hw_async_call(&ocs->hw, ocs_scsi_check_pending_async_cb, io)) {
ocs_log_test(ocs, "call to ocs_hw_async_call() failed\n");
}
}
}
} while (io != NULL);
/*
* If nothing was removed from the list,
* we might be in a case where we need to abort an
* active IO and the abort is on the pending list.
* Look for an abort we can dispatch.
*/
if (count == 0 ) {
dispatch = 0;
ocs_lock(&xport->io_pending_lock);
ocs_list_foreach(&xport->io_pending_list, io) {
if (io->io_type == OCS_IO_TYPE_ABORT) {
if (io->io_to_abort->hio != NULL) {
/* This IO has a HW IO, so it is active. Dispatch the abort. */
dispatch = 1;
} else {
/* Leave this abort on the pending list and keep looking */
dispatch = 0;
}
}
if (dispatch) {
ocs_list_remove(&xport->io_pending_list, io);
ocs_atomic_sub_return(&xport->io_pending_count, 1);
break;
}
}
ocs_unlock(&xport->io_pending_lock);
if (dispatch) {
status = ocs_scsi_io_dispatch_no_hw_io(io);
if (status) {
if (ocs_hw_async_call(&ocs->hw, ocs_scsi_check_pending_async_cb, io)) {
ocs_log_test(ocs, "call to ocs_hw_async_call() failed\n");
}
}
}
}
ocs_atomic_sub_return(&xport->io_pending_recursing, 1);
return;
}
/**
* @brief Attempt to dispatch a non-abort IO
*
* @par Description
* An IO is dispatched:
* - if the pending list is not empty, add IO to pending list
* and call a function to process the pending list.
* - if pending list is empty, try to allocate a HW IO. If none
* is available, place this IO at the tail of the pending IO
* list.
* - if HW IO is available, attach this IO to the HW IO and
* submit it.
*
* @param io Pointer to IO structure.
* @param cb Callback function.
*
* @return Returns 0 on success, a negative error code value on failure.
*/
int32_t
ocs_scsi_io_dispatch(ocs_io_t *io, void *cb)
{
ocs_hw_io_t *hio;
ocs_t *ocs = io->ocs;
ocs_xport_t *xport = ocs->xport;
ocs_assert(io->cmd_tgt || io->cmd_ini, -1);
ocs_assert((io->io_type != OCS_IO_TYPE_ABORT), -1);
io->hw_cb = cb;
/*
* if this IO already has a HW IO, then this is either not the first phase of
* the IO. Send it to the HW.
*/
if (io->hio != NULL) {
return ocs_scsi_io_dispatch_hw_io(io, io->hio);
}
/*
* We don't already have a HW IO associated with the IO. First check
* the pending list. If not empty, add IO to the tail and process the
* pending list.
*/
ocs_lock(&xport->io_pending_lock);
if (!ocs_list_empty(&xport->io_pending_list)) {
/*
* If this is a low latency request, the put at the front of the IO pending
* queue, otherwise put it at the end of the queue.
*/
if (io->low_latency) {
ocs_list_add_head(&xport->io_pending_list, io);
} else {
ocs_list_add_tail(&xport->io_pending_list, io);
}
ocs_unlock(&xport->io_pending_lock);
ocs_atomic_add_return(&xport->io_pending_count, 1);
ocs_atomic_add_return(&xport->io_total_pending, 1);
/* process pending list */
ocs_scsi_check_pending(ocs);
return 0;
}
ocs_unlock(&xport->io_pending_lock);
/*
* We don't have a HW IO associated with the IO and there's nothing
* on the pending list. Attempt to allocate a HW IO and dispatch it.
*/
hio = ocs_hw_io_alloc(&io->ocs->hw);
if (hio == NULL) {
/* Couldn't get a HW IO. Save this IO on the pending list */
ocs_lock(&xport->io_pending_lock);
ocs_list_add_tail(&xport->io_pending_list, io);
ocs_unlock(&xport->io_pending_lock);
ocs_atomic_add_return(&xport->io_total_pending, 1);
ocs_atomic_add_return(&xport->io_pending_count, 1);
return 0;
}
/* We successfully allocated a HW IO; dispatch to HW */
return ocs_scsi_io_dispatch_hw_io(io, hio);
}
/**
* @brief Attempt to dispatch an Abort IO.
*
* @par Description
* An Abort IO is dispatched:
* - if the pending list is not empty, add IO to pending list
* and call a function to process the pending list.
* - if pending list is empty, send abort to the HW.
*
* @param io Pointer to IO structure.
* @param cb Callback function.
*
* @return Returns 0 on success, a negative error code value on failure.
*/
int32_t
ocs_scsi_io_dispatch_abort(ocs_io_t *io, void *cb)
{
ocs_t *ocs = io->ocs;
ocs_xport_t *xport = ocs->xport;
ocs_assert((io->io_type == OCS_IO_TYPE_ABORT), -1);
io->hw_cb = cb;
/*
* For aborts, we don't need a HW IO, but we still want to pass through
* the pending list to preserve ordering. Thus, if the pending list is
* not empty, add this abort to the pending list and process the pending list.
*/
ocs_lock(&xport->io_pending_lock);
if (!ocs_list_empty(&xport->io_pending_list)) {
ocs_list_add_tail(&xport->io_pending_list, io);
ocs_unlock(&xport->io_pending_lock);
ocs_atomic_add_return(&xport->io_pending_count, 1);
ocs_atomic_add_return(&xport->io_total_pending, 1);
/* process pending list */
ocs_scsi_check_pending(ocs);
return 0;
}
ocs_unlock(&xport->io_pending_lock);
/* nothing on pending list, dispatch abort */
return ocs_scsi_io_dispatch_no_hw_io(io);
}
/**
* @brief Dispatch IO
*
* @par Description
* An IO and its associated HW IO is dispatched to the HW.
*
* @param io Pointer to IO structure.
* @param hio Pointer to HW IO structure from which IO will be
* dispatched.
*
* @return Returns 0 on success, a negative error code value on failure.
*/
static int32_t
ocs_scsi_io_dispatch_hw_io(ocs_io_t *io, ocs_hw_io_t *hio)
{
int32_t rc;
ocs_t *ocs = io->ocs;
/* Got a HW IO; update ini/tgt_task_tag with HW IO info and dispatch */
io->hio = hio;
if (io->cmd_tgt) {
io->tgt_task_tag = hio->indicator;
} else if (io->cmd_ini) {
io->init_task_tag = hio->indicator;
}
io->hw_tag = hio->reqtag;
hio->eq = io->hw_priv;
/* Copy WQ steering */
switch(io->wq_steering) {
case OCS_SCSI_WQ_STEERING_CLASS >> OCS_SCSI_WQ_STEERING_SHIFT:
hio->wq_steering = OCS_HW_WQ_STEERING_CLASS;
break;
case OCS_SCSI_WQ_STEERING_REQUEST >> OCS_SCSI_WQ_STEERING_SHIFT:
hio->wq_steering = OCS_HW_WQ_STEERING_REQUEST;
break;
case OCS_SCSI_WQ_STEERING_CPU >> OCS_SCSI_WQ_STEERING_SHIFT:
hio->wq_steering = OCS_HW_WQ_STEERING_CPU;
break;
}
switch (io->io_type) {
case OCS_IO_TYPE_IO: {
uint32_t max_sgl;
uint32_t total_count;
uint32_t host_allocated;
ocs_hw_get(&ocs->hw, OCS_HW_N_SGL, &max_sgl);
ocs_hw_get(&ocs->hw, OCS_HW_SGL_CHAINING_HOST_ALLOCATED, &host_allocated);
/*
* If the requested SGL is larger than the default size, then we can allocate
* an overflow SGL.
*/
total_count = ocs_scsi_count_sgls(&io->hw_dif, io->sgl, io->sgl_count);
/*
* Lancer requires us to allocate the chained memory area, but
* Skyhawk must use the SGL list associated with another XRI.
*/
if (host_allocated && total_count > max_sgl) {
/* Compute count needed, the number extra plus 1 for the link sge */
uint32_t count = total_count - max_sgl + 1;
rc = ocs_dma_alloc(ocs, &io->ovfl_sgl, count*sizeof(sli4_sge_t), 64);
if (rc) {
ocs_log_err(ocs, "ocs_dma_alloc overflow sgl failed\n");
break;
}
rc = ocs_hw_io_register_sgl(&ocs->hw, io->hio, &io->ovfl_sgl, count);
if (rc) {
ocs_scsi_io_free_ovfl(io);
ocs_log_err(ocs, "ocs_hw_io_register_sgl() failed\n");
break;
}
/* EVT: update chained_io_count */
io->node->chained_io_count++;
}
rc = ocs_scsi_build_sgls(&ocs->hw, io->hio, &io->hw_dif, io->sgl, io->sgl_count, io->hio_type);
if (rc) {
ocs_scsi_io_free_ovfl(io);
break;
}
if (OCS_LOG_ENABLE_SCSI_TRACE(ocs)) {
ocs_log_sgl(io);
}
if (io->app_id) {
io->iparam.fcp_tgt.app_id = io->app_id;
}
rc = ocs_hw_io_send(&io->ocs->hw, io->hio_type, io->hio, io->wire_len, &io->iparam, &io->node->rnode,
io->hw_cb, io);
break;
}
case OCS_IO_TYPE_ELS:
case OCS_IO_TYPE_CT: {
rc = ocs_hw_srrs_send(&ocs->hw, io->hio_type, io->hio,
&io->els_req, io->wire_len,
&io->els_rsp, &io->node->rnode, &io->iparam,
io->hw_cb, io);
break;
}
case OCS_IO_TYPE_CT_RESP: {
rc = ocs_hw_srrs_send(&ocs->hw, io->hio_type, io->hio,
&io->els_rsp, io->wire_len,
NULL, &io->node->rnode, &io->iparam,
io->hw_cb, io);
break;
}
case OCS_IO_TYPE_BLS_RESP: {
/* no need to update tgt_task_tag for BLS response since the RX_ID
* will be specified by the payload, not the XRI */
rc = ocs_hw_srrs_send(&ocs->hw, io->hio_type, io->hio,
NULL, 0, NULL, &io->node->rnode, &io->iparam, io->hw_cb, io);
break;
}
default:
scsi_io_printf(io, "Unknown IO type=%d\n", io->io_type);
rc = -1;
break;
}
return rc;
}
/**
* @brief Dispatch IO
*
* @par Description
* An IO that does require a HW IO is dispatched to the HW.
*
* @param io Pointer to IO structure.
*
* @return Returns 0 on success, or a negative error code value on failure.
*/
static int32_t
ocs_scsi_io_dispatch_no_hw_io(ocs_io_t *io)
{
int32_t rc;
switch (io->io_type) {
case OCS_IO_TYPE_ABORT: {
ocs_hw_io_t *hio_to_abort = NULL;
ocs_assert(io->io_to_abort, -1);
hio_to_abort = io->io_to_abort->hio;
if (hio_to_abort == NULL) {
/*
* If "IO to abort" does not have an associated HW IO, immediately
* make callback with success. The command must have been sent to
* the backend, but the data phase has not yet started, so we don't
* have a HW IO.
*
* Note: since the backend shims should be taking a reference
* on io_to_abort, it should not be possible to have been completed
* and freed by the backend before the abort got here.
*/
scsi_io_printf(io, "IO: " SCSI_IOFMT " not active\n",
SCSI_IOFMT_ARGS(io->io_to_abort));
((ocs_hw_done_t)io->hw_cb)(io->hio, NULL, 0, SLI4_FC_WCQE_STATUS_SUCCESS, 0, io);
rc = 0;
} else {
/* HW IO is valid, abort it */
scsi_io_printf(io, "aborting " SCSI_IOFMT "\n", SCSI_IOFMT_ARGS(io->io_to_abort));
rc = ocs_hw_io_abort(&io->ocs->hw, hio_to_abort, io->send_abts,
io->hw_cb, io);
if (rc) {
int status = SLI4_FC_WCQE_STATUS_SUCCESS;
if ((rc != OCS_HW_RTN_IO_NOT_ACTIVE) &&
(rc != OCS_HW_RTN_IO_ABORT_IN_PROGRESS)) {
status = -1;
scsi_io_printf(io, "Failed to abort IO: " SCSI_IOFMT " status=%d\n",
SCSI_IOFMT_ARGS(io->io_to_abort), rc);
}
((ocs_hw_done_t)io->hw_cb)(io->hio, NULL, 0, status, 0, io);
rc = 0;
}
}
break;
}
default:
scsi_io_printf(io, "Unknown IO type=%d\n", io->io_type);
rc = -1;
break;
}
return rc;
}
/**
* @ingroup scsi_api_base
* @brief Send read/write data.
*
* @par Description
* This call is made by a target-server to initiate a SCSI read or write data phase, transferring
* data between the target to the remote initiator. The payload is specified by the
* scatter-gather list @c sgl of length @c sgl_count. The @c wire_len argument
* specifies the payload length (independent of the scatter-gather list cumulative length).
* @n @n
* The @c flags argument has one bit, OCS_SCSI_LAST_DATAPHASE, which is a hint to the base
* driver that it may use auto SCSI response features if the hardware supports it.
* @n @n
* Upon completion, the callback function @b cb is called with flags indicating that the
* IO has completed (OCS_SCSI_IO_COMPL) and another data phase or response may be sent;
* that the IO has completed and no response needs to be sent (OCS_SCSI_IO_COMPL_NO_RSP);
* or that the IO was aborted (OCS_SCSI_IO_ABORTED).
*
* @param io Pointer to the IO context.
* @param flags Flags controlling the sending of data.
* @param dif_info Pointer to T10 DIF fields, or NULL if no DIF.
* @param sgl Pointer to the payload scatter-gather list.
* @param sgl_count Count of the scatter-gather list elements.
* @param xwire_len Length of the payload on wire, in bytes.
* @param type HW IO type.
* @param enable_ar Enable auto-response if true.
* @param cb Completion callback.
* @param arg Application-supplied callback data.
*
* @return Returns 0 on success, or a negative error code value on failure.
*/
static inline int32_t
ocs_scsi_xfer_data(ocs_io_t *io, uint32_t flags,
ocs_scsi_dif_info_t *dif_info,
ocs_scsi_sgl_t *sgl, uint32_t sgl_count, uint32_t xwire_len,
ocs_hw_io_type_e type, int enable_ar,
ocs_scsi_io_cb_t cb, void *arg)
{
int32_t rc;
ocs_t *ocs;
uint32_t disable_ar_tgt_dif = FALSE;
size_t residual = 0;
if ((dif_info != NULL) && (dif_info->dif_oper == OCS_SCSI_DIF_OPER_DISABLED)) {
dif_info = NULL;
}
ocs_assert(io, -1);
if (dif_info != NULL) {
ocs_hw_get(&io->ocs->hw, OCS_HW_DISABLE_AR_TGT_DIF, &disable_ar_tgt_dif);
if (disable_ar_tgt_dif) {
enable_ar = FALSE;
}
}
io->sgl_count = sgl_count;
/* If needed, copy SGL */
if (sgl && (sgl != io->sgl)) {
ocs_assert(sgl_count <= io->sgl_allocated, -1);
ocs_memcpy(io->sgl, sgl, sgl_count*sizeof(*io->sgl));
}
ocs = io->ocs;
ocs_assert(ocs, -1);
ocs_assert(io->node, -1);
scsi_io_trace(io, "%s wire_len %d\n", (type == OCS_HW_IO_TARGET_READ) ? "send" : "recv", xwire_len);
ocs_assert(sgl, -1);
ocs_assert(sgl_count > 0, -1);
ocs_assert(io->exp_xfer_len > io->transferred, -1);
io->hio_type = type;
io->scsi_tgt_cb = cb;
io->scsi_tgt_cb_arg = arg;
rc = ocs_scsi_convert_dif_info(ocs, dif_info, &io->hw_dif);
if (rc) {
return rc;
}
/* If DIF is used, then save lba for error recovery */
if (dif_info) {
io->scsi_dif_info = *dif_info;
}
io->wire_len = MIN(xwire_len, io->exp_xfer_len - io->transferred);
residual = (xwire_len - io->wire_len);
ocs_memset(&io->iparam, 0, sizeof(io->iparam));
io->iparam.fcp_tgt.ox_id = io->init_task_tag;
io->iparam.fcp_tgt.offset = io->transferred;
io->iparam.fcp_tgt.dif_oper = io->hw_dif.dif;
io->iparam.fcp_tgt.blk_size = io->hw_dif.blk_size;
io->iparam.fcp_tgt.cs_ctl = io->cs_ctl;
io->iparam.fcp_tgt.timeout = io->timeout;
/* if this is the last data phase and there is no residual, enable
* auto-good-response
*/
if (enable_ar && (flags & OCS_SCSI_LAST_DATAPHASE) &&
(residual == 0) && ((io->transferred + io->wire_len) == io->exp_xfer_len) && (!(flags & OCS_SCSI_NO_AUTO_RESPONSE))) {
io->iparam.fcp_tgt.flags |= SLI4_IO_AUTO_GOOD_RESPONSE;
io->auto_resp = TRUE;
} else {
io->auto_resp = FALSE;
}
/* save this transfer length */
io->xfer_req = io->wire_len;
/* Adjust the transferred count to account for overrun
* when the residual is calculated in ocs_scsi_send_resp
*/
io->transferred += residual;
/* Adjust the SGL size if there is overrun */
if (residual) {
ocs_scsi_sgl_t *sgl_ptr = &io->sgl[sgl_count-1];
while (residual) {
size_t len = sgl_ptr->len;
if ( len > residual) {
sgl_ptr->len = len - residual;
residual = 0;
} else {
sgl_ptr->len = 0;
residual -= len;
io->sgl_count--;
}
sgl_ptr--;
}
}
/* Set latency and WQ steering */
io->low_latency = (flags & OCS_SCSI_LOW_LATENCY) != 0;
io->wq_steering = (flags & OCS_SCSI_WQ_STEERING_MASK) >> OCS_SCSI_WQ_STEERING_SHIFT;
io->wq_class = (flags & OCS_SCSI_WQ_CLASS_MASK) >> OCS_SCSI_WQ_CLASS_SHIFT;
return ocs_scsi_io_dispatch(io, ocs_target_io_cb);
}
int32_t
ocs_scsi_send_rd_data(ocs_io_t *io, uint32_t flags,
ocs_scsi_dif_info_t *dif_info,
ocs_scsi_sgl_t *sgl, uint32_t sgl_count, uint32_t len,
ocs_scsi_io_cb_t cb, void *arg)
{
return ocs_scsi_xfer_data(io, flags, dif_info, sgl, sgl_count, len, OCS_HW_IO_TARGET_READ,
enable_tsend_auto_resp(io->ocs), cb, arg);
}
int32_t
ocs_scsi_recv_wr_data(ocs_io_t *io, uint32_t flags,
ocs_scsi_dif_info_t *dif_info,
ocs_scsi_sgl_t *sgl, uint32_t sgl_count, uint32_t len,
ocs_scsi_io_cb_t cb, void *arg)
{
return ocs_scsi_xfer_data(io, flags, dif_info, sgl, sgl_count, len, OCS_HW_IO_TARGET_WRITE,
enable_treceive_auto_resp(io->ocs), cb, arg);
}
/**
* @ingroup scsi_api_base
* @brief Free overflow SGL.
*
* @par Description
* Free the overflow SGL if it is present.
*
* @param io Pointer to IO object.
*
* @return None.
*/
static void
ocs_scsi_io_free_ovfl(ocs_io_t *io) {
if (io->ovfl_sgl.size) {
ocs_dma_free(io->ocs, &io->ovfl_sgl);
}
}
/**
* @ingroup scsi_api_base
* @brief Send response data.
*
* @par Description
* This function is used by a target-server to send the SCSI response data to a remote
* initiator node. The target-server populates the @c ocs_scsi_cmd_resp_t
* argument with scsi status, status qualifier, sense data, and response data, as
* needed.
* @n @n
* Upon completion, the callback function @c cb is invoked. The target-server will generally
* clean up its IO context resources and call ocs_scsi_io_complete().
*
* @param io Pointer to the IO context.
* @param flags Flags to control sending of the SCSI response.
* @param rsp Pointer to the response data populated by the caller.
* @param cb Completion callback.
* @param arg Application-specified completion callback argument.
* @return Returns 0 on success, or a negative error code value on failure.
*/
int32_t
ocs_scsi_send_resp(ocs_io_t *io, uint32_t flags, ocs_scsi_cmd_resp_t *rsp, ocs_scsi_io_cb_t cb, void *arg)
{
ocs_t *ocs;
int32_t residual;
int auto_resp = TRUE; /* Always try auto resp */
uint8_t scsi_status = 0;
uint16_t scsi_status_qualifier = 0;
uint8_t *sense_data = NULL;
uint32_t sense_data_length = 0;
ocs_assert(io, -1);
ocs = io->ocs;
ocs_assert(ocs, -1);
ocs_assert(io->node, -1);
ocs_scsi_convert_dif_info(ocs, NULL, &io->hw_dif);
if (rsp) {
scsi_status = rsp->scsi_status;
scsi_status_qualifier = rsp->scsi_status_qualifier;
sense_data = rsp->sense_data;
sense_data_length = rsp->sense_data_length;
residual = rsp->residual;
} else {
residual = io->exp_xfer_len - io->transferred;
}
io->wire_len = 0;
io->hio_type = OCS_HW_IO_TARGET_RSP;
io->scsi_tgt_cb = cb;
io->scsi_tgt_cb_arg = arg;
ocs_memset(&io->iparam, 0, sizeof(io->iparam));
io->iparam.fcp_tgt.ox_id = io->init_task_tag;
io->iparam.fcp_tgt.offset = 0;
io->iparam.fcp_tgt.cs_ctl = io->cs_ctl;
io->iparam.fcp_tgt.timeout = io->timeout;
/* Set low latency queueing request */
io->low_latency = (flags & OCS_SCSI_LOW_LATENCY) != 0;
io->wq_steering = (flags & OCS_SCSI_WQ_STEERING_MASK) >> OCS_SCSI_WQ_STEERING_SHIFT;
io->wq_class = (flags & OCS_SCSI_WQ_CLASS_MASK) >> OCS_SCSI_WQ_CLASS_SHIFT;
if ((scsi_status != 0) || residual || sense_data_length) {
fcp_rsp_iu_t *fcprsp = io->rspbuf.virt;
if (!fcprsp) {
ocs_log_err(ocs, "NULL response buffer\n");
return -1;
}
auto_resp = FALSE;
ocs_memset(fcprsp, 0, sizeof(*fcprsp));
io->wire_len += (sizeof(*fcprsp) - sizeof(fcprsp->data));
fcprsp->scsi_status = scsi_status;
*((uint16_t*)fcprsp->status_qualifier) = ocs_htobe16(scsi_status_qualifier);
/* set residual status if necessary */
if (residual != 0) {
/* FCP: if data transferred is less than the amount expected, then this is an
* underflow. If data transferred would have been greater than the amount expected
* then this is an overflow
*/
if (residual > 0) {
fcprsp->flags |= FCP_RESID_UNDER;
*((uint32_t *)fcprsp->fcp_resid) = ocs_htobe32(residual);
} else {
fcprsp->flags |= FCP_RESID_OVER;
*((uint32_t *)fcprsp->fcp_resid) = ocs_htobe32(-residual);
}
}
if (sense_data && sense_data_length) {
ocs_assert(sense_data_length <= sizeof(fcprsp->data), -1);
fcprsp->flags |= FCP_SNS_LEN_VALID;
ocs_memcpy(fcprsp->data, sense_data, sense_data_length);
*((uint32_t*)fcprsp->fcp_sns_len) = ocs_htobe32(sense_data_length);
io->wire_len += sense_data_length;
}
io->sgl[0].addr = io->rspbuf.phys;
io->sgl[0].dif_addr = 0;
io->sgl[0].len = io->wire_len;
io->sgl_count = 1;
}
if (auto_resp) {
io->iparam.fcp_tgt.flags |= SLI4_IO_AUTO_GOOD_RESPONSE;
}
return ocs_scsi_io_dispatch(io, ocs_target_io_cb);
}
/**
* @ingroup scsi_api_base
* @brief Send TMF response data.
*
* @par Description
* This function is used by a target-server to send SCSI TMF response data to a remote
* initiator node.
* Upon completion, the callback function @c cb is invoked. The target-server will generally
* clean up its IO context resources and call ocs_scsi_io_complete().
*
* @param io Pointer to the IO context.
* @param rspcode TMF response code.
* @param addl_rsp_info Additional TMF response information (may be NULL for zero data).
* @param cb Completion callback.
* @param arg Application-specified completion callback argument.
*
* @return Returns 0 on success, or a negative error code value on failure.
*/
int32_t
ocs_scsi_send_tmf_resp(ocs_io_t *io, ocs_scsi_tmf_resp_e rspcode, uint8_t addl_rsp_info[3],
ocs_scsi_io_cb_t cb, void *arg)
{
int32_t rc = -1;
ocs_t *ocs = NULL;
fcp_rsp_iu_t *fcprsp = NULL;
fcp_rsp_info_t *rspinfo = NULL;
uint8_t fcp_rspcode;
ocs_assert(io, -1);
ocs_assert(io->ocs, -1);
ocs_assert(io->node, -1);
ocs = io->ocs;
io->wire_len = 0;
ocs_scsi_convert_dif_info(ocs, NULL, &io->hw_dif);
switch(rspcode) {
case OCS_SCSI_TMF_FUNCTION_COMPLETE:
fcp_rspcode = FCP_TMF_COMPLETE;
break;
case OCS_SCSI_TMF_FUNCTION_SUCCEEDED:
case OCS_SCSI_TMF_FUNCTION_IO_NOT_FOUND:
fcp_rspcode = FCP_TMF_SUCCEEDED;
break;
case OCS_SCSI_TMF_FUNCTION_REJECTED:
fcp_rspcode = FCP_TMF_REJECTED;
break;
case OCS_SCSI_TMF_INCORRECT_LOGICAL_UNIT_NUMBER:
fcp_rspcode = FCP_TMF_INCORRECT_LUN;
break;
case OCS_SCSI_TMF_SERVICE_DELIVERY:
fcp_rspcode = FCP_TMF_FAILED;
break;
default:
fcp_rspcode = FCP_TMF_REJECTED;
break;
}
io->hio_type = OCS_HW_IO_TARGET_RSP;
io->scsi_tgt_cb = cb;
io->scsi_tgt_cb_arg = arg;
if (io->tmf_cmd == OCS_SCSI_TMF_ABORT_TASK) {
rc = ocs_target_send_bls_resp(io, cb, arg);
return rc;
}
/* populate the FCP TMF response */
fcprsp = io->rspbuf.virt;
ocs_memset(fcprsp, 0, sizeof(*fcprsp));
fcprsp->flags |= FCP_RSP_LEN_VALID;
rspinfo = (fcp_rsp_info_t*) fcprsp->data;
if (addl_rsp_info != NULL) {
ocs_memcpy(rspinfo->addl_rsp_info, addl_rsp_info, sizeof(rspinfo->addl_rsp_info));
}
rspinfo->rsp_code = fcp_rspcode;
io->wire_len = sizeof(*fcprsp) - sizeof(fcprsp->data) + sizeof(*rspinfo);
*((uint32_t*)fcprsp->fcp_rsp_len) = ocs_htobe32(sizeof(*rspinfo));
io->sgl[0].addr = io->rspbuf.phys;
io->sgl[0].dif_addr = 0;
io->sgl[0].len = io->wire_len;
io->sgl_count = 1;
ocs_memset(&io->iparam, 0, sizeof(io->iparam));
io->iparam.fcp_tgt.ox_id = io->init_task_tag;
io->iparam.fcp_tgt.offset = 0;
io->iparam.fcp_tgt.cs_ctl = io->cs_ctl;
io->iparam.fcp_tgt.timeout = io->timeout;
rc = ocs_scsi_io_dispatch(io, ocs_target_io_cb);
return rc;
}
/**
* @brief Process target abort callback.
*
* @par Description
* Accepts HW abort requests.
*
* @param hio HW IO context.
* @param rnode Remote node.
* @param length Length of response data.
* @param status Completion status.
* @param ext_status Extended completion status.
* @param app Application-specified callback data.
*
* @return Returns 0 on success, or a negative error code value on failure.
*/
static int32_t
ocs_target_abort_cb(ocs_hw_io_t *hio, ocs_remote_node_t *rnode, uint32_t length, int32_t status, uint32_t ext_status, void *app)
{
ocs_io_t *io = app;
ocs_t *ocs;
ocs_scsi_io_status_e scsi_status;
ocs_assert(io, -1);
ocs_assert(io->ocs, -1);
ocs = io->ocs;
if (io->abort_cb) {
ocs_scsi_io_cb_t abort_cb = io->abort_cb;
void *abort_cb_arg = io->abort_cb_arg;
io->abort_cb = NULL;
io->abort_cb_arg = NULL;
switch (status) {
case SLI4_FC_WCQE_STATUS_SUCCESS:
scsi_status = OCS_SCSI_STATUS_GOOD;
break;
case SLI4_FC_WCQE_STATUS_LOCAL_REJECT:
switch (ext_status) {
case SLI4_FC_LOCAL_REJECT_NO_XRI:
scsi_status = OCS_SCSI_STATUS_NO_IO;
break;
case SLI4_FC_LOCAL_REJECT_ABORT_IN_PROGRESS:
scsi_status = OCS_SCSI_STATUS_ABORT_IN_PROGRESS;
break;
default:
/* TODO: we have seen 0x15 (abort in progress) */
scsi_status = OCS_SCSI_STATUS_ERROR;
break;
}
break;
case SLI4_FC_WCQE_STATUS_FCP_RSP_FAILURE:
scsi_status = OCS_SCSI_STATUS_CHECK_RESPONSE;
break;
default:
scsi_status = OCS_SCSI_STATUS_ERROR;
break;
}
/* invoke callback */
abort_cb(io->io_to_abort, scsi_status, 0, abort_cb_arg);
}
ocs_assert(io != io->io_to_abort, -1);
/* done with IO to abort */
ocs_ref_put(&io->io_to_abort->ref); /* ocs_ref_get(): ocs_scsi_tgt_abort_io() */
ocs_io_free(ocs, io);
ocs_scsi_check_pending(ocs);
return 0;
}
/**
* @ingroup scsi_api_base
* @brief Abort a target IO.
*
* @par Description
* This routine is called from a SCSI target-server. It initiates an abort of a
* previously-issued target data phase or response request.
*
* @param io IO context.
* @param cb SCSI target server callback.
* @param arg SCSI target server supplied callback argument.
*
* @return Returns 0 on success, or a non-zero value on failure.
*/
int32_t
ocs_scsi_tgt_abort_io(ocs_io_t *io, ocs_scsi_io_cb_t cb, void *arg)
{
ocs_t *ocs;
ocs_xport_t *xport;
int32_t rc;
ocs_io_t *abort_io = NULL;
ocs_assert(io, -1);
ocs_assert(io->node, -1);
ocs_assert(io->ocs, -1);
ocs = io->ocs;
xport = ocs->xport;
/* take a reference on IO being aborted */
if ((ocs_ref_get_unless_zero(&io->ref) == 0)) {
/* command no longer active */
scsi_io_printf(io, "command no longer active\n");
return -1;
}
/*
* allocate a new IO to send the abort request. Use ocs_io_alloc() directly, as
* we need an IO object that will not fail allocation due to allocations being
* disabled (in ocs_scsi_io_alloc())
*/
abort_io = ocs_io_alloc(ocs);
if (abort_io == NULL) {
ocs_atomic_add_return(&xport->io_alloc_failed_count, 1);
ocs_ref_put(&io->ref); /* ocs_ref_get(): same function */
return -1;
}
/* Save the target server callback and argument */
ocs_assert(abort_io->hio == NULL, -1);
/* set generic fields */
abort_io->cmd_tgt = TRUE;
abort_io->node = io->node;
/* set type and abort-specific fields */
abort_io->io_type = OCS_IO_TYPE_ABORT;
abort_io->display_name = "tgt_abort";
abort_io->io_to_abort = io;
abort_io->send_abts = FALSE;
abort_io->abort_cb = cb;
abort_io->abort_cb_arg = arg;
/* now dispatch IO */
rc = ocs_scsi_io_dispatch_abort(abort_io, ocs_target_abort_cb);
if (rc) {
ocs_ref_put(&io->ref); /* ocs_ref_get(): same function */
}
return rc;
}
/**
* @brief Process target BLS response callback.
*
* @par Description
* Accepts HW abort requests.
*
* @param hio HW IO context.
* @param rnode Remote node.
* @param length Length of response data.
* @param status Completion status.
* @param ext_status Extended completion status.
* @param app Application-specified callback data.
*
* @return Returns 0 on success, or a negative error code value on failure.
*/
static int32_t
ocs_target_bls_resp_cb(ocs_hw_io_t *hio, ocs_remote_node_t *rnode, uint32_t length, int32_t status, uint32_t ext_status, void *app)
{
ocs_io_t *io = app;
ocs_t *ocs;
ocs_scsi_io_status_e bls_status;
ocs_assert(io, -1);
ocs_assert(io->ocs, -1);
ocs = io->ocs;
/* BLS isn't really a "SCSI" concept, but use SCSI status */
if (status) {
io_error_log(io, "s=%#x x=%#x\n", status, ext_status);
bls_status = OCS_SCSI_STATUS_ERROR;
} else {
bls_status = OCS_SCSI_STATUS_GOOD;
}
if (io->bls_cb) {
ocs_scsi_io_cb_t bls_cb = io->bls_cb;
void *bls_cb_arg = io->bls_cb_arg;
io->bls_cb = NULL;
io->bls_cb_arg = NULL;
/* invoke callback */
bls_cb(io, bls_status, 0, bls_cb_arg);
}
ocs_scsi_check_pending(ocs);
return 0;
}
/**
* @brief Complete abort request.
*
* @par Description
* An abort request is completed by posting a BA_ACC for the IO that requested the abort.
*
* @param io Pointer to the IO context.
* @param cb Callback function to invoke upon completion.
* @param arg Application-specified completion callback argument.
*
* @return Returns 0 on success, or a negative error code value on failure.
*/
static int32_t
ocs_target_send_bls_resp(ocs_io_t *io, ocs_scsi_io_cb_t cb, void *arg)
{
int32_t rc;
fc_ba_acc_payload_t *acc;
ocs_assert(io, -1);
/* fill out IO structure with everything needed to send BA_ACC */
ocs_memset(&io->iparam, 0, sizeof(io->iparam));
io->iparam.bls.ox_id = io->init_task_tag;
io->iparam.bls.rx_id = io->abort_rx_id;
acc = (void *)io->iparam.bls.payload;
ocs_memset(io->iparam.bls.payload, 0, sizeof(io->iparam.bls.payload));
acc->ox_id = io->iparam.bls.ox_id;
acc->rx_id = io->iparam.bls.rx_id;
acc->high_seq_cnt = UINT16_MAX;
/* generic io fields have already been populated */
/* set type and BLS-specific fields */
io->io_type = OCS_IO_TYPE_BLS_RESP;
io->display_name = "bls_rsp";
io->hio_type = OCS_HW_BLS_ACC;
io->bls_cb = cb;
io->bls_cb_arg = arg;
/* dispatch IO */
rc = ocs_scsi_io_dispatch(io, ocs_target_bls_resp_cb);
return rc;
}
/**
* @ingroup scsi_api_base
* @brief Notify the base driver that the IO is complete.
*
* @par Description
* This function is called by a target-server to notify the base driver that an IO
* has completed, allowing for the base driver to free resources.
* @n
* @n @b Note: This function is not called by initiator-clients.
*
* @param io Pointer to IO context.
*
* @return None.
*/
void
ocs_scsi_io_complete(ocs_io_t *io)
{
ocs_assert(io);
if (!ocs_io_busy(io)) {
ocs_log_test(io->ocs, "Got completion for non-busy io with tag 0x%x\n", io->tag);
return;
}
scsi_io_trace(io, "freeing io 0x%p %s\n", io, io->display_name);
ocs_assert(ocs_ref_read_count(&io->ref) > 0);
ocs_ref_put(&io->ref); /* ocs_ref_get(): ocs_scsi_io_alloc() */
}
/**
* @brief Handle initiator IO completion.
*
* @par Description
* This callback is made upon completion of an initiator operation (initiator read/write command).
*
* @param hio HW IO context.
* @param rnode Remote node.
* @param length Length of completion data.
* @param status Completion status.
* @param ext_status Extended completion status.
* @param app Application-specified callback data.
*
* @return None.
*/
static void
ocs_initiator_io_cb(ocs_hw_io_t *hio, ocs_remote_node_t *rnode, uint32_t length,
int32_t status, uint32_t ext_status, void *app)
{
ocs_io_t *io = app;
ocs_t *ocs;
ocs_scsi_io_status_e scsi_status;
ocs_assert(io);
ocs_assert(io->scsi_ini_cb);
scsi_io_trace(io, "status x%x ext_status x%x\n", status, ext_status);
ocs = io->ocs;
ocs_assert(ocs);
ocs_scsi_io_free_ovfl(io);
/* Call target server completion */
if (io->scsi_ini_cb) {
fcp_rsp_iu_t *fcprsp = io->rspbuf.virt;
ocs_scsi_cmd_resp_t rsp;
ocs_scsi_rsp_io_cb_t cb = io->scsi_ini_cb;
uint32_t flags = 0;
uint8_t *pd = fcprsp->data;
/* Clear the callback before invoking the callback */
io->scsi_ini_cb = NULL;
ocs_memset(&rsp, 0, sizeof(rsp));
/* Unless status is FCP_RSP_FAILURE, fcprsp is not filled in */
switch (status) {
case SLI4_FC_WCQE_STATUS_SUCCESS:
scsi_status = OCS_SCSI_STATUS_GOOD;
break;
case SLI4_FC_WCQE_STATUS_FCP_RSP_FAILURE:
scsi_status = OCS_SCSI_STATUS_CHECK_RESPONSE;
rsp.scsi_status = fcprsp->scsi_status;
rsp.scsi_status_qualifier = ocs_be16toh(*((uint16_t*)fcprsp->status_qualifier));
if (fcprsp->flags & FCP_RSP_LEN_VALID) {
rsp.response_data = pd;
rsp.response_data_length = ocs_fc_getbe32(fcprsp->fcp_rsp_len);
pd += rsp.response_data_length;
}
if (fcprsp->flags & FCP_SNS_LEN_VALID) {
uint32_t sns_len = ocs_fc_getbe32(fcprsp->fcp_sns_len);
rsp.sense_data = pd;
rsp.sense_data_length = sns_len;
pd += sns_len;
}
/* Set residual */
if (fcprsp->flags & FCP_RESID_OVER) {
rsp.residual = -ocs_fc_getbe32(fcprsp->fcp_resid);
rsp.response_wire_length = length;
} else if (fcprsp->flags & FCP_RESID_UNDER) {
rsp.residual = ocs_fc_getbe32(fcprsp->fcp_resid);
rsp.response_wire_length = length;
}
/*
* Note: The FCP_RSP_FAILURE can be returned for initiator IOs when the total data
* placed does not match the requested length even if the status is good. If
* the status is all zeroes, then we have to assume that a frame(s) were
* dropped and change the status to LOCAL_REJECT/OUT_OF_ORDER_DATA
*/
if (length != io->wire_len) {
uint32_t rsp_len = ext_status;
uint8_t *rsp_bytes = io->rspbuf.virt;
uint32_t i;
uint8_t all_zeroes = (rsp_len > 0);
/* Check if the rsp is zero */
for (i = 0; i < rsp_len; i++) {
if (rsp_bytes[i] != 0) {
all_zeroes = FALSE;
break;
}
}
if (all_zeroes) {
scsi_status = OCS_SCSI_STATUS_ERROR;
ocs_log_test(io->ocs, "[%s]" SCSI_IOFMT "local reject=0x%02x\n",
io->node->display_name, SCSI_IOFMT_ARGS(io),
SLI4_FC_LOCAL_REJECT_OUT_OF_ORDER_DATA);
}
}
break;
case SLI4_FC_WCQE_STATUS_LOCAL_REJECT:
if (ext_status == SLI4_FC_LOCAL_REJECT_SEQUENCE_TIMEOUT) {
scsi_status = OCS_SCSI_STATUS_COMMAND_TIMEOUT;
} else {
scsi_status = OCS_SCSI_STATUS_ERROR;
}
break;
case SLI4_FC_WCQE_STATUS_DI_ERROR:
if (ext_status & 0x01) {
scsi_status = OCS_SCSI_STATUS_DIF_GUARD_ERROR;
} else if (ext_status & 0x02) {
scsi_status = OCS_SCSI_STATUS_DIF_APP_TAG_ERROR;
} else if (ext_status & 0x04) {
scsi_status = OCS_SCSI_STATUS_DIF_REF_TAG_ERROR;
} else {
scsi_status = OCS_SCSI_STATUS_DIF_UNKNOWN_ERROR;
}
break;
default:
scsi_status = OCS_SCSI_STATUS_ERROR;
break;
}
cb(io, scsi_status, &rsp, flags, io->scsi_ini_cb_arg);
}
ocs_scsi_check_pending(ocs);
}
/**
* @ingroup scsi_api_base
* @brief Initiate initiator read IO.
*
* @par Description
* This call is made by an initiator-client to send a SCSI read command. The payload
* for the command is given by a scatter-gather list @c sgl for @c sgl_count
* entries.
* @n @n
* Upon completion, the callback @b cb is invoked and passed request status.
* If the command completed successfully, the callback is given SCSI response data.
*
* @param node Pointer to the node.
* @param io Pointer to the IO context.
* @param lun LUN value.
* @param cdb Pointer to the CDB.
* @param cdb_len Length of the CDB.
* @param dif_info Pointer to the T10 DIF fields, or NULL if no DIF.
* @param sgl Pointer to the scatter-gather list.
* @param sgl_count Count of the scatter-gather list elements.
* @param wire_len Length of the payload.
* @param cb Completion callback.
* @param arg Application-specified completion callback argument.
*
* @return Returns 0 on success, or a negative error code value on failure.
*/
int32_t
ocs_scsi_send_rd_io(ocs_node_t *node, ocs_io_t *io, uint64_t lun, void *cdb, uint32_t cdb_len,
ocs_scsi_dif_info_t *dif_info,
ocs_scsi_sgl_t *sgl, uint32_t sgl_count, uint32_t wire_len,
ocs_scsi_rsp_io_cb_t cb, void *arg)
{
int32_t rc;
rc = ocs_scsi_send_io(OCS_HW_IO_INITIATOR_READ, node, io, lun, 0, cdb, cdb_len, dif_info, sgl, sgl_count,
wire_len, 0, cb, arg);
return rc;
}
/**
* @ingroup scsi_api_base
* @brief Initiate initiator write IO.
*
* @par Description
* This call is made by an initiator-client to send a SCSI write command. The payload
* for the command is given by a scatter-gather list @c sgl for @c sgl_count
* entries.
* @n @n
* Upon completion, the callback @c cb is invoked and passed request status. If the command
* completed successfully, the callback is given SCSI response data.
*
* @param node Pointer to the node.
* @param io Pointer to IO context.
* @param lun LUN value.
* @param cdb Pointer to the CDB.
* @param cdb_len Length of the CDB.
* @param dif_info Pointer to the T10 DIF fields, or NULL if no DIF.
* @param sgl Pointer to the scatter-gather list.
* @param sgl_count Count of the scatter-gather list elements.
* @param wire_len Length of the payload.
* @param cb Completion callback.
* @param arg Application-specified completion callback argument.
*
* @return Returns 0 on success, or a negative error code value on failure.
*/
int32_t ocs_scsi_send_wr_io(ocs_node_t *node, ocs_io_t *io, uint64_t lun, void *cdb, uint32_t cdb_len,
ocs_scsi_dif_info_t *dif_info,
ocs_scsi_sgl_t *sgl, uint32_t sgl_count, uint32_t wire_len,
ocs_scsi_rsp_io_cb_t cb, void *arg)
{
int32_t rc;
rc = ocs_scsi_send_io(OCS_HW_IO_INITIATOR_WRITE, node, io, lun, 0, cdb, cdb_len, dif_info, sgl, sgl_count,
wire_len, 0, cb, arg);
return rc;
}
/**
* @ingroup scsi_api_base
* @brief Initiate initiator write IO.
*
* @par Description
* This call is made by an initiator-client to send a SCSI write command. The payload
* for the command is given by a scatter-gather list @c sgl for @c sgl_count
* entries.
* @n @n
* Upon completion, the callback @c cb is invoked and passed request status. If the command
* completed successfully, the callback is given SCSI response data.
*
* @param node Pointer to the node.
* @param io Pointer to IO context.
* @param lun LUN value.
* @param cdb Pointer to the CDB.
* @param cdb_len Length of the CDB.
* @param dif_info Pointer to the T10 DIF fields, or NULL if no DIF.
* @param sgl Pointer to the scatter-gather list.
* @param sgl_count Count of the scatter-gather list elements.
* @param wire_len Length of the payload.
* @param first_burst Number of first burst bytes to send.
* @param cb Completion callback.
* @param arg Application-specified completion callback argument.
*
* @return Returns 0 on success, or a negative error code value on failure.
*/
int32_t
ocs_scsi_send_wr_io_first_burst(ocs_node_t *node, ocs_io_t *io, uint64_t lun, void *cdb, uint32_t cdb_len,
ocs_scsi_dif_info_t *dif_info,
ocs_scsi_sgl_t *sgl, uint32_t sgl_count, uint32_t wire_len, uint32_t first_burst,
ocs_scsi_rsp_io_cb_t cb, void *arg)
{
int32_t rc;
rc = ocs_scsi_send_io(OCS_HW_IO_INITIATOR_WRITE, node, io, lun, 0, cdb, cdb_len, dif_info, sgl, sgl_count,
wire_len, 0, cb, arg);
return rc;
}
/**
* @ingroup scsi_api_base
* @brief Initiate initiator SCSI command with no data.
*
* @par Description
* This call is made by an initiator-client to send a SCSI command with no data.
* @n @n
* Upon completion, the callback @c cb is invoked and passed request status. If the command
* completed successfully, the callback is given SCSI response data.
*
* @param node Pointer to the node.
* @param io Pointer to the IO context.
* @param lun LUN value.
* @param cdb Pointer to the CDB.
* @param cdb_len Length of the CDB.
* @param cb Completion callback.
* @param arg Application-specified completion callback argument.
*
* @return Returns 0 on success, or a negative error code value on failure.
*/
int32_t ocs_scsi_send_nodata_io(ocs_node_t *node, ocs_io_t *io, uint64_t lun, void *cdb, uint32_t cdb_len,
ocs_scsi_rsp_io_cb_t cb, void *arg)
{
int32_t rc;
rc = ocs_scsi_send_io(OCS_HW_IO_INITIATOR_NODATA, node, io, lun, 0, cdb, cdb_len, NULL, NULL, 0, 0, 0, cb, arg);
return rc;
}
/**
* @ingroup scsi_api_base
* @brief Initiate initiator task management operation.
*
* @par Description
* This command is used to send a SCSI task management function command. If the command
* requires it (QUERY_TASK_SET for example), a payload may be associated with the command.
* If no payload is required, then @c sgl_count may be zero and @c sgl is ignored.
* @n @n
* Upon completion @c cb is invoked with status and SCSI response data.
*
* @param node Pointer to the node.
* @param io Pointer to the IO context.
* @param io_to_abort Pointer to the IO context to abort in the
* case of OCS_SCSI_TMF_ABORT_TASK. Note: this can point to the
* same the same ocs_io_t as @c io, provided that @c io does not
* have any outstanding work requests.
* @param lun LUN value.
* @param tmf Task management command.
* @param sgl Pointer to the scatter-gather list.
* @param sgl_count Count of the scatter-gather list elements.
* @param len Length of the payload.
* @param cb Completion callback.
* @param arg Application-specified completion callback argument.
*
* @return Returns 0 on success, or a negative error code value on failure.
*/
int32_t
ocs_scsi_send_tmf(ocs_node_t *node, ocs_io_t *io, ocs_io_t *io_to_abort, uint64_t lun, ocs_scsi_tmf_cmd_e tmf,
ocs_scsi_sgl_t *sgl, uint32_t sgl_count, uint32_t len, ocs_scsi_rsp_io_cb_t cb, void *arg)
{
int32_t rc;
ocs_assert(io, -1);
if (tmf == OCS_SCSI_TMF_ABORT_TASK) {
ocs_assert(io_to_abort, -1);
/* take a reference on IO being aborted */
if ((ocs_ref_get_unless_zero(&io_to_abort->ref) == 0)) {
/* command no longer active */
scsi_io_printf(io, "command no longer active\n");
return -1;
}
/* generic io fields have already been populated */
/* abort-specific fields */
io->io_type = OCS_IO_TYPE_ABORT;
io->display_name = "abort_task";
io->io_to_abort = io_to_abort;
io->send_abts = TRUE;
io->scsi_ini_cb = cb;
io->scsi_ini_cb_arg = arg;
/* now dispatch IO */
rc = ocs_scsi_io_dispatch_abort(io, ocs_scsi_abort_io_cb);
if (rc) {
scsi_io_printf(io, "Failed to dispatch abort\n");
ocs_ref_put(&io->ref); /* ocs_ref_get(): same function */
}
} else {
io->display_name = "tmf";
rc = ocs_scsi_send_io(OCS_HW_IO_INITIATOR_READ, node, io, lun, tmf, NULL, 0, NULL,
sgl, sgl_count, len, 0, cb, arg);
}
return rc;
}
/**
* @ingroup scsi_api_base
* @brief Send an FCP IO.
*
* @par Description
* An FCP read/write IO command, with optional task management flags, is sent to @c node.
*
* @param type HW IO type to send.
* @param node Pointer to the node destination of the IO.
* @param io Pointer to the IO context.
* @param lun LUN value.
* @param tmf Task management command.
* @param cdb Pointer to the SCSI CDB.
* @param cdb_len Length of the CDB, in bytes.
* @param dif_info Pointer to the T10 DIF fields, or NULL if no DIF.
* @param sgl Pointer to the scatter-gather list.
* @param sgl_count Number of SGL entries in SGL.
* @param wire_len Payload length, in bytes, of data on wire.
* @param first_burst Number of first burst bytes to send.
* @param cb Completion callback.
* @param arg Application-specified completion callback argument.
*
* @return Returns 0 on success, or a negative error code value on failure.
*/
/* tc: could elminiate LUN, as it's part of the IO structure */
static int32_t ocs_scsi_send_io(ocs_hw_io_type_e type, ocs_node_t *node, ocs_io_t *io, uint64_t lun,
ocs_scsi_tmf_cmd_e tmf, uint8_t *cdb, uint32_t cdb_len,
ocs_scsi_dif_info_t *dif_info,
ocs_scsi_sgl_t *sgl, uint32_t sgl_count, uint32_t wire_len, uint32_t first_burst,
ocs_scsi_rsp_io_cb_t cb, void *arg)
{
int32_t rc;
ocs_t *ocs;
fcp_cmnd_iu_t *cmnd;
uint32_t cmnd_bytes = 0;
uint32_t *fcp_dl;
uint8_t tmf_flags = 0;
ocs_assert(io->node, -1);
ocs_assert(io->node == node, -1);
ocs_assert(io, -1);
ocs = io->ocs;
ocs_assert(cb, -1);
io->sgl_count = sgl_count;
/* Copy SGL if needed */
if (sgl != io->sgl) {
ocs_assert(sgl_count <= io->sgl_allocated, -1);
ocs_memcpy(io->sgl, sgl, sizeof(*io->sgl) * sgl_count);
}
/* save initiator and target task tags for debugging */
io->tgt_task_tag = 0xffff;
io->wire_len = wire_len;
io->hio_type = type;
if (OCS_LOG_ENABLE_SCSI_TRACE(ocs)) {
char buf[80];
ocs_textbuf_t txtbuf;
uint32_t i;
ocs_textbuf_init(ocs, &txtbuf, buf, sizeof(buf));
ocs_textbuf_printf(&txtbuf, "cdb%d: ", cdb_len);
for (i = 0; i < cdb_len; i ++) {
ocs_textbuf_printf(&txtbuf, "%02X%s", cdb[i], (i == (cdb_len-1)) ? "" : " ");
}
scsi_io_printf(io, "%s len %d, %s\n", (io->hio_type == OCS_HW_IO_INITIATOR_READ) ? "read" :
(io->hio_type == OCS_HW_IO_INITIATOR_WRITE) ? "write" : "", io->wire_len,
ocs_textbuf_get_buffer(&txtbuf));
}
ocs_assert(io->cmdbuf.virt, -1);
cmnd = io->cmdbuf.virt;
ocs_assert(sizeof(*cmnd) <= io->cmdbuf.size, -1);
ocs_memset(cmnd, 0, sizeof(*cmnd));
/* Default FCP_CMND IU doesn't include additional CDB bytes but does include FCP_DL */
cmnd_bytes = sizeof(fcp_cmnd_iu_t) - sizeof(cmnd->fcp_cdb_and_dl) + sizeof(uint32_t);
fcp_dl = (uint32_t*)(&(cmnd->fcp_cdb_and_dl));
if (cdb) {
if (cdb_len <= 16) {
ocs_memcpy(cmnd->fcp_cdb, cdb, cdb_len);
} else {
uint32_t addl_cdb_bytes;
ocs_memcpy(cmnd->fcp_cdb, cdb, 16);
addl_cdb_bytes = cdb_len - 16;
ocs_memcpy(cmnd->fcp_cdb_and_dl, &(cdb[16]), addl_cdb_bytes);
/* additional_fcp_cdb_length is in words, not bytes */
cmnd->additional_fcp_cdb_length = (addl_cdb_bytes + 3) / 4;
fcp_dl += cmnd->additional_fcp_cdb_length;
/* Round up additional CDB bytes */
cmnd_bytes += (addl_cdb_bytes + 3) & ~0x3;
}
}
be64enc(cmnd->fcp_lun, CAM_EXTLUN_BYTE_SWIZZLE(lun));
if (node->fcp2device) {
if(ocs_get_crn(node, &cmnd->command_reference_number,
lun)) {
return -1;
}
}
switch (tmf) {
case OCS_SCSI_TMF_QUERY_TASK_SET:
tmf_flags = FCP_QUERY_TASK_SET;
break;
case OCS_SCSI_TMF_ABORT_TASK_SET:
tmf_flags = FCP_ABORT_TASK_SET;
break;
case OCS_SCSI_TMF_CLEAR_TASK_SET:
tmf_flags = FCP_CLEAR_TASK_SET;
break;
case OCS_SCSI_TMF_QUERY_ASYNCHRONOUS_EVENT:
tmf_flags = FCP_QUERY_ASYNCHRONOUS_EVENT;
break;
case OCS_SCSI_TMF_LOGICAL_UNIT_RESET:
tmf_flags = FCP_LOGICAL_UNIT_RESET;
break;
case OCS_SCSI_TMF_CLEAR_ACA:
tmf_flags = FCP_CLEAR_ACA;
break;
case OCS_SCSI_TMF_TARGET_RESET:
tmf_flags = FCP_TARGET_RESET;
break;
default:
tmf_flags = 0;
}
cmnd->task_management_flags = tmf_flags;
*fcp_dl = ocs_htobe32(io->wire_len);
switch (io->hio_type) {
case OCS_HW_IO_INITIATOR_READ:
cmnd->rddata = 1;
break;
case OCS_HW_IO_INITIATOR_WRITE:
cmnd->wrdata = 1;
break;
case OCS_HW_IO_INITIATOR_NODATA:
/* sets neither */
break;
default:
ocs_log_test(ocs, "bad IO type %d\n", io->hio_type);
return -1;
}
rc = ocs_scsi_convert_dif_info(ocs, dif_info, &io->hw_dif);
if (rc) {
return rc;
}
io->scsi_ini_cb = cb;
io->scsi_ini_cb_arg = arg;
/* set command and response buffers in the iparam */
io->iparam.fcp_ini.cmnd = &io->cmdbuf;
io->iparam.fcp_ini.cmnd_size = cmnd_bytes;
io->iparam.fcp_ini.rsp = &io->rspbuf;
io->iparam.fcp_ini.flags = 0;
io->iparam.fcp_ini.dif_oper = io->hw_dif.dif;
io->iparam.fcp_ini.blk_size = io->hw_dif.blk_size;
io->iparam.fcp_ini.timeout = io->timeout;
io->iparam.fcp_ini.first_burst = first_burst;
return ocs_scsi_io_dispatch(io, ocs_initiator_io_cb);
}
/**
* @ingroup scsi_api_base
* @brief Callback for an aborted IO.
*
* @par Description
* Callback function invoked upon completion of an IO abort request.
*
* @param hio HW IO context.
* @param rnode Remote node.
* @param len Response length.
* @param status Completion status.
* @param ext_status Extended completion status.
* @param arg Application-specific callback, usually IO context.
* @return Returns 0 on success, or a negative error code value on failure.
*/
static int32_t
ocs_scsi_abort_io_cb(struct ocs_hw_io_s *hio, ocs_remote_node_t *rnode, uint32_t len, int32_t status,
uint32_t ext_status, void *arg)
{
ocs_io_t *io = arg;
ocs_t *ocs;
ocs_scsi_io_status_e scsi_status = OCS_SCSI_STATUS_GOOD;
ocs_assert(io, -1);
ocs_assert(ocs_io_busy(io), -1);
ocs_assert(io->ocs, -1);
ocs_assert(io->io_to_abort, -1);
ocs = io->ocs;
ocs_log_debug(ocs, "status %d ext %d\n", status, ext_status);
/* done with IO to abort */
ocs_ref_put(&io->io_to_abort->ref); /* ocs_ref_get(): ocs_scsi_send_tmf() */
ocs_scsi_io_free_ovfl(io);
switch (status) {
case SLI4_FC_WCQE_STATUS_SUCCESS:
scsi_status = OCS_SCSI_STATUS_GOOD;
break;
case SLI4_FC_WCQE_STATUS_LOCAL_REJECT:
if (ext_status == SLI4_FC_LOCAL_REJECT_ABORT_REQUESTED) {
scsi_status = OCS_SCSI_STATUS_ABORTED;
} else if (ext_status == SLI4_FC_LOCAL_REJECT_NO_XRI) {
scsi_status = OCS_SCSI_STATUS_NO_IO;
} else if (ext_status == SLI4_FC_LOCAL_REJECT_ABORT_IN_PROGRESS) {
scsi_status = OCS_SCSI_STATUS_ABORT_IN_PROGRESS;
} else {
ocs_log_test(ocs, "Unhandled local reject 0x%x/0x%x\n", status, ext_status);
scsi_status = OCS_SCSI_STATUS_ERROR;
}
break;
default:
scsi_status = OCS_SCSI_STATUS_ERROR;
break;
}
if (io->scsi_ini_cb) {
(*io->scsi_ini_cb)(io, scsi_status, NULL, 0, io->scsi_ini_cb_arg);
} else {
ocs_scsi_io_free(io);
}
ocs_scsi_check_pending(ocs);
return 0;
}
/**
* @ingroup scsi_api_base
* @brief Return SCSI API integer valued property.
*
* @par Description
* This function is called by a target-server or initiator-client to
* retrieve an integer valued property.
*
* @param ocs Pointer to the ocs.
* @param prop Property value to return.
*
* @return Returns a value, or 0 if invalid property was requested.
*/
uint32_t
ocs_scsi_get_property(ocs_t *ocs, ocs_scsi_property_e prop)
{
ocs_xport_t *xport = ocs->xport;
uint32_t val;
switch (prop) {
case OCS_SCSI_MAX_SGE:
if (0 == ocs_hw_get(&ocs->hw, OCS_HW_MAX_SGE, &val)) {
return val;
}
break;
case OCS_SCSI_MAX_SGL:
if (ocs->ctrlmask & OCS_CTRLMASK_TEST_CHAINED_SGLS) {
/*
* If chain SGL test-mode is enabled, the number of HW SGEs
* has been limited; report back original max.
*/
return (OCS_FC_MAX_SGL);
}
if (0 == ocs_hw_get(&ocs->hw, OCS_HW_N_SGL, &val)) {
return val;
}
break;
case OCS_SCSI_MAX_IOS:
return ocs_io_pool_allocated(xport->io_pool);
case OCS_SCSI_DIF_CAPABLE:
if (0 == ocs_hw_get(&ocs->hw, OCS_HW_DIF_CAPABLE, &val)) {
return val;
}
break;
case OCS_SCSI_MAX_FIRST_BURST:
return 0;
case OCS_SCSI_DIF_MULTI_SEPARATE:
if (ocs_hw_get(&ocs->hw, OCS_HW_DIF_MULTI_SEPARATE, &val) == 0) {
return val;
}
break;
case OCS_SCSI_ENABLE_TASK_SET_FULL:
/* Return FALSE if we are send frame capable */
if (ocs_hw_get(&ocs->hw, OCS_HW_SEND_FRAME_CAPABLE, &val) == 0) {
return ! val;
}
break;
default:
break;
}
ocs_log_debug(ocs, "invalid property request %d\n", prop);
return 0;
}
/**
* @ingroup scsi_api_base
* @brief Return a property pointer.
*
* @par Description
* This function is called by a target-server or initiator-client to
* retrieve a pointer to the requested property.
*
* @param ocs Pointer to the ocs.
* @param prop Property value to return.
*
* @return Returns pointer to the requested property, or NULL otherwise.
*/
void *ocs_scsi_get_property_ptr(ocs_t *ocs, ocs_scsi_property_e prop)
{
void *rc = NULL;
switch (prop) {
case OCS_SCSI_WWNN:
rc = ocs_hw_get_ptr(&ocs->hw, OCS_HW_WWN_NODE);
break;
case OCS_SCSI_WWPN:
rc = ocs_hw_get_ptr(&ocs->hw, OCS_HW_WWN_PORT);
break;
case OCS_SCSI_PORTNUM:
rc = ocs_hw_get_ptr(&ocs->hw, OCS_HW_PORTNUM);
break;
case OCS_SCSI_BIOS_VERSION_STRING:
rc = ocs_hw_get_ptr(&ocs->hw, OCS_HW_BIOS_VERSION_STRING);
break;
#if defined(OCS_ENABLE_VPD_SUPPORT)
case OCS_SCSI_SERIALNUMBER:
{
uint8_t *pvpd;
uint32_t vpd_len;
if (ocs_hw_get(&ocs->hw, OCS_HW_VPD_LEN, &vpd_len)) {
ocs_log_test(ocs, "Can't get VPD length\n");
rc = "\012sn-unknown";
break;
}
pvpd = ocs_hw_get_ptr(&ocs->hw, OCS_HW_VPD);
if (pvpd) {
rc = ocs_find_vpd(pvpd, vpd_len, "SN");
}
if (rc == NULL ||
ocs_strlen(rc) == 0) {
/* Note: VPD is missing, using wwnn for serial number */
scsi_log(ocs, "Note: VPD is missing, using wwnn for serial number\n");
/* Use the last 32 bits of the WWN */
if ((ocs == NULL) || (ocs->domain == NULL) || (ocs->domain->sport == NULL)) {
rc = "\011(Unknown)";
} else {
rc = &ocs->domain->sport->wwnn_str[8];
}
}
break;
}
case OCS_SCSI_PARTNUMBER:
{
uint8_t *pvpd;
uint32_t vpd_len;
if (ocs_hw_get(&ocs->hw, OCS_HW_VPD_LEN, &vpd_len)) {
ocs_log_test(ocs, "Can't get VPD length\n");
rc = "\012pn-unknown";
break;
}
pvpd = ocs_hw_get_ptr(&ocs->hw, OCS_HW_VPD);
if (pvpd) {
rc = ocs_find_vpd(pvpd, vpd_len, "PN");
if (rc == NULL) {
rc = "\012pn-unknown";
}
} else {
rc = "\012pn-unknown";
}
break;
}
#endif
default:
break;
}
if (rc == NULL) {
ocs_log_debug(ocs, "invalid property request %d\n", prop);
}
return rc;
}
/**
* @ingroup scsi_api_base
* @brief Notify that delete initiator is complete.
*
* @par Description
* Sent by the target-server to notify the base driver that the work started from
* ocs_scsi_del_initiator() is now complete and that it is safe for the node to
* release the rest of its resources.
*
* @param node Pointer to the node.
*
* @return None.
*/
void
ocs_scsi_del_initiator_complete(ocs_node_t *node)
{
/* Notify the node to resume */
ocs_node_post_event(node, OCS_EVT_NODE_DEL_INI_COMPLETE, NULL);
}
/**
* @ingroup scsi_api_base
* @brief Notify that delete target is complete.
*
* @par Description
* Sent by the initiator-client to notify the base driver that the work started from
* ocs_scsi_del_target() is now complete and that it is safe for the node to
* release the rest of its resources.
*
* @param node Pointer to the node.
*
* @return None.
*/
void
ocs_scsi_del_target_complete(ocs_node_t *node)
{
/* Notify the node to resume */
ocs_node_post_event(node, OCS_EVT_NODE_DEL_TGT_COMPLETE, NULL);
}
/**
* @brief Update transferred count
*
* @par Description
* Updates io->transferred, as required when using first burst, when the amount
* of first burst data processed differs from the amount of first burst
* data received.
*
* @param io Pointer to the io object.
* @param transferred Number of bytes transferred out of first burst buffers.
*
* @return None.
*/
void
ocs_scsi_update_first_burst_transferred(ocs_io_t *io, uint32_t transferred)
{
io->transferred = transferred;
}
/**
* @brief Register bounce callback for multi-threading.
*
* @par Description
* Register the back end bounce function.
*
* @param ocs Pointer to device object.
* @param fctn Function pointer of bounce function.
*
* @return None.
*/
void
ocs_scsi_register_bounce(ocs_t *ocs, void(*fctn)(void(*fctn)(void *arg), void *arg, uint32_t s_id, uint32_t d_id,
uint32_t ox_id))
{
ocs_hw_rtn_e rc;
rc = ocs_hw_callback(&ocs->hw, OCS_HW_CB_BOUNCE, fctn, NULL);
if (rc) {
ocs_log_test(ocs, "ocs_hw_callback(OCS_HW_CB_BOUNCE) failed: %d\n", rc);
}
}