485 lines
15 KiB
C
485 lines
15 KiB
C
/*-
|
|
* 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.
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* Provide IO object allocation.
|
|
*/
|
|
|
|
/*!
|
|
* @defgroup io_alloc IO allocation
|
|
*/
|
|
|
|
#include "ocs.h"
|
|
#include "ocs_scsi.h"
|
|
#include "ocs_els.h"
|
|
#include "ocs_utils.h"
|
|
|
|
void ocs_mgmt_io_list(ocs_textbuf_t *textbuf, void *io);
|
|
void ocs_mgmt_io_get_all(ocs_textbuf_t *textbuf, void *io);
|
|
int ocs_mgmt_io_get(ocs_textbuf_t *textbuf, char *parent, char *name, void *io);
|
|
|
|
static ocs_mgmt_functions_t io_mgmt_functions = {
|
|
.get_list_handler = ocs_mgmt_io_list,
|
|
.get_handler = ocs_mgmt_io_get,
|
|
.get_all_handler = ocs_mgmt_io_get_all,
|
|
};
|
|
|
|
/**
|
|
* @brief IO pool.
|
|
*
|
|
* Structure encapsulating a pool of IO objects.
|
|
*
|
|
*/
|
|
|
|
struct ocs_io_pool_s {
|
|
ocs_t *ocs; /* Pointer to device object */
|
|
ocs_lock_t lock; /* IO pool lock */
|
|
uint32_t io_num_ios; /* Total IOs allocated */
|
|
ocs_pool_t *pool;
|
|
};
|
|
|
|
/**
|
|
* @brief Create a pool of IO objects.
|
|
*
|
|
* @par Description
|
|
* This function allocates memory in larger chucks called
|
|
* "slabs" which are a fixed size. It calculates the number of IO objects that
|
|
* fit within each "slab" and determines the number of "slabs" required to
|
|
* allocate the number of IOs requested. Each of the slabs is allocated and
|
|
* then it grabs each IO object within the slab and adds it to the free list.
|
|
* Individual command, response and SGL DMA buffers are allocated for each IO.
|
|
*
|
|
* "Slabs"
|
|
* +----------------+
|
|
* | |
|
|
* +----------------+ |
|
|
* | IO | |
|
|
* +----------------+ |
|
|
* | ... | |
|
|
* +----------------+__+
|
|
* | IO |
|
|
* +----------------+
|
|
*
|
|
* @param ocs Driver instance's software context.
|
|
* @param num_io Number of IO contexts to allocate.
|
|
* @param num_sgl Number of SGL entries to allocate for each IO.
|
|
*
|
|
* @return Returns a pointer to a new ocs_io_pool_t on success,
|
|
* or NULL on failure.
|
|
*/
|
|
|
|
ocs_io_pool_t *
|
|
ocs_io_pool_create(ocs_t *ocs, uint32_t num_io, uint32_t num_sgl)
|
|
{
|
|
uint32_t i = 0;
|
|
int32_t rc = -1;
|
|
ocs_io_pool_t *io_pool;
|
|
|
|
/* Allocate the IO pool */
|
|
io_pool = ocs_malloc(ocs, sizeof(*io_pool), OCS_M_ZERO | OCS_M_NOWAIT);
|
|
if (io_pool == NULL) {
|
|
ocs_log_err(ocs, "allocate of IO pool failed\n");
|
|
return NULL;
|
|
}
|
|
|
|
io_pool->ocs = ocs;
|
|
io_pool->io_num_ios = num_io;
|
|
|
|
/* initialize IO pool lock */
|
|
ocs_lock_init(ocs, &io_pool->lock, "io_pool lock[%d]", ocs->instance_index);
|
|
|
|
io_pool->pool = ocs_pool_alloc(ocs, sizeof(ocs_io_t), io_pool->io_num_ios, FALSE);
|
|
|
|
for (i = 0; i < io_pool->io_num_ios; i++) {
|
|
ocs_io_t *io = ocs_pool_get_instance(io_pool->pool, i);
|
|
|
|
io->tag = i;
|
|
io->instance_index = i;
|
|
io->ocs = ocs;
|
|
|
|
/* allocate a command/response dma buffer */
|
|
if (ocs->enable_ini) {
|
|
rc = ocs_dma_alloc(ocs, &io->cmdbuf, SCSI_CMD_BUF_LENGTH, OCS_MIN_DMA_ALIGNMENT);
|
|
if (rc) {
|
|
ocs_log_err(ocs, "ocs_dma_alloc cmdbuf failed\n");
|
|
ocs_io_pool_free(io_pool);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/* Allocate a response buffer */
|
|
rc = ocs_dma_alloc(ocs, &io->rspbuf, SCSI_RSP_BUF_LENGTH, OCS_MIN_DMA_ALIGNMENT);
|
|
if (rc) {
|
|
ocs_log_err(ocs, "ocs_dma_alloc cmdbuf failed\n");
|
|
ocs_io_pool_free(io_pool);
|
|
return NULL;
|
|
}
|
|
|
|
/* Allocate SGL */
|
|
io->sgl = ocs_malloc(ocs, sizeof(*io->sgl) * num_sgl, OCS_M_NOWAIT | OCS_M_ZERO);
|
|
if (io->sgl == NULL) {
|
|
ocs_log_err(ocs, "malloc sgl's failed\n");
|
|
ocs_io_pool_free(io_pool);
|
|
return NULL;
|
|
}
|
|
io->sgl_allocated = num_sgl;
|
|
io->sgl_count = 0;
|
|
|
|
/* Make IO backend call to initialize IO */
|
|
ocs_scsi_tgt_io_init(io);
|
|
ocs_scsi_ini_io_init(io);
|
|
|
|
rc = ocs_dma_alloc(ocs, &io->els_req, OCS_ELS_REQ_LEN, OCS_MIN_DMA_ALIGNMENT);
|
|
if (rc) {
|
|
ocs_log_err(ocs, "ocs_dma_alloc els_req failed\n");
|
|
ocs_io_pool_free(io_pool);
|
|
return NULL;
|
|
}
|
|
|
|
rc = ocs_dma_alloc(ocs, &io->els_rsp, OCS_ELS_GID_PT_RSP_LEN, OCS_MIN_DMA_ALIGNMENT);
|
|
if (rc) {
|
|
ocs_log_err(ocs, "ocs_dma_alloc els_rsp failed\n");
|
|
ocs_io_pool_free(io_pool);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
return io_pool;
|
|
}
|
|
|
|
/**
|
|
* @brief Free IO objects pool
|
|
*
|
|
* @par Description
|
|
* The pool of IO objects are freed.
|
|
*
|
|
* @param io_pool Pointer to IO pool object.
|
|
*
|
|
* @return Returns 0 on success, or a negative error code value on failure.
|
|
*/
|
|
int32_t
|
|
ocs_io_pool_free(ocs_io_pool_t *io_pool)
|
|
{
|
|
ocs_t *ocs;
|
|
uint32_t i;
|
|
ocs_io_t *io;
|
|
|
|
if (io_pool != NULL) {
|
|
ocs = io_pool->ocs;
|
|
for (i = 0; i < io_pool->io_num_ios; i++) {
|
|
io = ocs_pool_get_instance(io_pool->pool, i);
|
|
if (!io)
|
|
continue;
|
|
ocs_scsi_tgt_io_exit(io);
|
|
ocs_scsi_ini_io_exit(io);
|
|
if (io->sgl) {
|
|
ocs_free(ocs, io->sgl, sizeof(*io->sgl) * io->sgl_allocated);
|
|
}
|
|
ocs_dma_free(ocs, &io->cmdbuf);
|
|
ocs_dma_free(ocs, &io->rspbuf);
|
|
ocs_dma_free(ocs, &io->els_req);
|
|
ocs_dma_free(ocs, &io->els_rsp);
|
|
}
|
|
|
|
if (io_pool->pool != NULL) {
|
|
ocs_pool_free(io_pool->pool);
|
|
}
|
|
ocs_lock_free(&io_pool->lock);
|
|
ocs_free(ocs, io_pool, sizeof(*io_pool));
|
|
ocs->xport->io_pool = NULL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
uint32_t ocs_io_pool_allocated(ocs_io_pool_t *io_pool)
|
|
{
|
|
return io_pool->io_num_ios;
|
|
}
|
|
|
|
/**
|
|
* @ingroup io_alloc
|
|
* @brief Allocate an object used to track an IO.
|
|
*
|
|
* @param io_pool Pointer to the IO pool.
|
|
*
|
|
* @return Returns the pointer to a new object, or NULL if none available.
|
|
*/
|
|
ocs_io_t *
|
|
ocs_io_pool_io_alloc(ocs_io_pool_t *io_pool)
|
|
{
|
|
ocs_io_t *io = NULL;
|
|
ocs_t *ocs;
|
|
|
|
ocs_assert(io_pool, NULL);
|
|
|
|
ocs = io_pool->ocs;
|
|
|
|
ocs_lock(&io_pool->lock);
|
|
if ((io = ocs_pool_get(io_pool->pool)) != NULL) {
|
|
ocs_unlock(&io_pool->lock);
|
|
|
|
io->io_type = OCS_IO_TYPE_MAX;
|
|
io->hio_type = OCS_HW_IO_MAX;
|
|
io->hio = NULL;
|
|
io->transferred = 0;
|
|
io->ocs = ocs;
|
|
io->timeout = 0;
|
|
io->sgl_count = 0;
|
|
io->tgt_task_tag = 0;
|
|
io->init_task_tag = 0;
|
|
io->hw_tag = 0;
|
|
io->display_name = "pending";
|
|
io->seq_init = 0;
|
|
io->els_req_free = 0;
|
|
io->mgmt_functions = &io_mgmt_functions;
|
|
io->io_free = 0;
|
|
ocs_atomic_add_return(&ocs->xport->io_active_count, 1);
|
|
ocs_atomic_add_return(&ocs->xport->io_total_alloc, 1);
|
|
} else {
|
|
ocs_unlock(&io_pool->lock);
|
|
}
|
|
return io;
|
|
}
|
|
|
|
/**
|
|
* @ingroup io_alloc
|
|
* @brief Free an object used to track an IO.
|
|
*
|
|
* @param io_pool Pointer to IO pool object.
|
|
* @param io Pointer to the IO object.
|
|
*/
|
|
void
|
|
ocs_io_pool_io_free(ocs_io_pool_t *io_pool, ocs_io_t *io)
|
|
{
|
|
ocs_t *ocs;
|
|
ocs_hw_io_t *hio = NULL;
|
|
|
|
ocs_assert(io_pool);
|
|
|
|
ocs = io_pool->ocs;
|
|
|
|
ocs_lock(&io_pool->lock);
|
|
hio = io->hio;
|
|
io->hio = NULL;
|
|
ocs_pool_put(io_pool->pool, io);
|
|
ocs_unlock(&io_pool->lock);
|
|
|
|
if (hio) {
|
|
ocs_hw_io_free(&ocs->hw, hio);
|
|
}
|
|
io->io_free = 1;
|
|
ocs_atomic_sub_return(&ocs->xport->io_active_count, 1);
|
|
ocs_atomic_add_return(&ocs->xport->io_total_free, 1);
|
|
}
|
|
|
|
/**
|
|
* @ingroup io_alloc
|
|
* @brief Find an I/O given it's node and ox_id.
|
|
*
|
|
* @param ocs Driver instance's software context.
|
|
* @param node Pointer to node.
|
|
* @param ox_id OX_ID to find.
|
|
* @param rx_id RX_ID to find (0xffff for unassigned).
|
|
*/
|
|
ocs_io_t *
|
|
ocs_io_find_tgt_io(ocs_t *ocs, ocs_node_t *node, uint16_t ox_id, uint16_t rx_id)
|
|
{
|
|
ocs_io_t *io = NULL;
|
|
|
|
ocs_lock(&node->active_ios_lock);
|
|
ocs_list_foreach(&node->active_ios, io)
|
|
if ((io->cmd_tgt && (io->init_task_tag == ox_id)) &&
|
|
((rx_id == 0xffff) || (io->tgt_task_tag == rx_id))) {
|
|
break;
|
|
}
|
|
ocs_unlock(&node->active_ios_lock);
|
|
return io;
|
|
}
|
|
|
|
/**
|
|
* @ingroup io_alloc
|
|
* @brief Return IO context given the instance index.
|
|
*
|
|
* @par Description
|
|
* Returns a pointer to the IO context given by the instance index.
|
|
*
|
|
* @param ocs Pointer to driver structure.
|
|
* @param index IO instance index to return.
|
|
*
|
|
* @return Returns a pointer to the IO context, or NULL if not found.
|
|
*/
|
|
ocs_io_t *
|
|
ocs_io_get_instance(ocs_t *ocs, uint32_t index)
|
|
{
|
|
ocs_xport_t *xport = ocs->xport;
|
|
ocs_io_pool_t *io_pool = xport->io_pool;
|
|
return ocs_pool_get_instance(io_pool->pool, index);
|
|
}
|
|
|
|
/**
|
|
* @brief Generate IO context ddump data.
|
|
*
|
|
* The ddump data for an IO context is generated.
|
|
*
|
|
* @param textbuf Pointer to text buffer.
|
|
* @param io Pointer to IO context.
|
|
*
|
|
* @return None.
|
|
*/
|
|
|
|
void
|
|
ocs_ddump_io(ocs_textbuf_t *textbuf, ocs_io_t *io)
|
|
{
|
|
ocs_ddump_section(textbuf, "io", io->instance_index);
|
|
ocs_ddump_value(textbuf, "display_name", "%s", io->display_name);
|
|
ocs_ddump_value(textbuf, "node_name", "%s", io->node->display_name);
|
|
|
|
ocs_ddump_value(textbuf, "ref_count", "%d", ocs_ref_read_count(&io->ref));
|
|
ocs_ddump_value(textbuf, "io_type", "%d", io->io_type);
|
|
ocs_ddump_value(textbuf, "hio_type", "%d", io->hio_type);
|
|
ocs_ddump_value(textbuf, "cmd_tgt", "%d", io->cmd_tgt);
|
|
ocs_ddump_value(textbuf, "cmd_ini", "%d", io->cmd_ini);
|
|
ocs_ddump_value(textbuf, "send_abts", "%d", io->send_abts);
|
|
ocs_ddump_value(textbuf, "init_task_tag", "0x%x", io->init_task_tag);
|
|
ocs_ddump_value(textbuf, "tgt_task_tag", "0x%x", io->tgt_task_tag);
|
|
ocs_ddump_value(textbuf, "hw_tag", "0x%x", io->hw_tag);
|
|
ocs_ddump_value(textbuf, "tag", "0x%x", io->tag);
|
|
ocs_ddump_value(textbuf, "timeout", "%d", io->timeout);
|
|
ocs_ddump_value(textbuf, "tmf_cmd", "%d", io->tmf_cmd);
|
|
ocs_ddump_value(textbuf, "abort_rx_id", "0x%x", io->abort_rx_id);
|
|
|
|
ocs_ddump_value(textbuf, "busy", "%d", ocs_io_busy(io));
|
|
ocs_ddump_value(textbuf, "transferred", "%zu", io->transferred);
|
|
ocs_ddump_value(textbuf, "auto_resp", "%d", io->auto_resp);
|
|
ocs_ddump_value(textbuf, "exp_xfer_len", "%d", io->exp_xfer_len);
|
|
ocs_ddump_value(textbuf, "xfer_req", "%d", io->xfer_req);
|
|
ocs_ddump_value(textbuf, "seq_init", "%d", io->seq_init);
|
|
|
|
ocs_ddump_value(textbuf, "alloc_link", "%d", ocs_list_on_list(&io->io_alloc_link));
|
|
ocs_ddump_value(textbuf, "pending_link", "%d", ocs_list_on_list(&io->io_pending_link));
|
|
ocs_ddump_value(textbuf, "backend_link", "%d", ocs_list_on_list(&io->link));
|
|
|
|
if (io->hio) {
|
|
ocs_ddump_value(textbuf, "hw_tag", "%#x", io->hio->reqtag);
|
|
ocs_ddump_value(textbuf, "hw_xri", "%#x", io->hio->indicator);
|
|
ocs_ddump_value(textbuf, "hw_type", "%#x", io->hio->type);
|
|
} else {
|
|
ocs_ddump_value(textbuf, "hw_tag", "%s", "pending");
|
|
ocs_ddump_value(textbuf, "hw_xri", "%s", "pending");
|
|
ocs_ddump_value(textbuf, "hw_type", "%s", "pending");
|
|
}
|
|
|
|
ocs_scsi_ini_ddump(textbuf, OCS_SCSI_DDUMP_IO, io);
|
|
ocs_scsi_tgt_ddump(textbuf, OCS_SCSI_DDUMP_IO, io);
|
|
|
|
ocs_ddump_endsection(textbuf, "io", io->instance_index);
|
|
}
|
|
|
|
void
|
|
ocs_mgmt_io_list(ocs_textbuf_t *textbuf, void *object)
|
|
{
|
|
|
|
/* Readonly values */
|
|
ocs_mgmt_emit_property_name(textbuf, MGMT_MODE_RD, "display_name");
|
|
ocs_mgmt_emit_property_name(textbuf, MGMT_MODE_RD, "init_task_tag");
|
|
ocs_mgmt_emit_property_name(textbuf, MGMT_MODE_RD, "tag");
|
|
ocs_mgmt_emit_property_name(textbuf, MGMT_MODE_RD, "transferred");
|
|
ocs_mgmt_emit_property_name(textbuf, MGMT_MODE_RD, "auto_resp");
|
|
ocs_mgmt_emit_property_name(textbuf, MGMT_MODE_RD, "exp_xfer_len");
|
|
ocs_mgmt_emit_property_name(textbuf, MGMT_MODE_RD, "xfer_req");
|
|
}
|
|
|
|
int
|
|
ocs_mgmt_io_get(ocs_textbuf_t *textbuf, char *parent, char *name, void *object)
|
|
{
|
|
char qualifier[80];
|
|
int retval = -1;
|
|
ocs_io_t *io = (ocs_io_t *) object;
|
|
|
|
snprintf(qualifier, sizeof(qualifier), "%s/io[%d]", parent, io->instance_index);
|
|
|
|
/* If it doesn't start with my qualifier I don't know what to do with it */
|
|
if (ocs_strncmp(name, qualifier, strlen(qualifier)) == 0) {
|
|
char *unqualified_name = name + strlen(qualifier) +1;
|
|
|
|
/* See if it's a value I can supply */
|
|
if (ocs_strcmp(unqualified_name, "display_name") == 0) {
|
|
ocs_mgmt_emit_string(textbuf, MGMT_MODE_RD, "display_name", io->display_name);
|
|
retval = 0;
|
|
} else if (ocs_strcmp(unqualified_name, "init_task_tag") == 0) {
|
|
ocs_mgmt_emit_int(textbuf, MGMT_MODE_RD, "init_task_tag", "0x%x", io->init_task_tag);
|
|
retval = 0;
|
|
} else if (ocs_strcmp(unqualified_name, "tgt_task_tag") == 0) {
|
|
ocs_mgmt_emit_int(textbuf, MGMT_MODE_RD, "tgt_task_tag", "0x%x", io->tgt_task_tag);
|
|
retval = 0;
|
|
} else if (ocs_strcmp(unqualified_name, "hw_tag") == 0) {
|
|
ocs_mgmt_emit_int(textbuf, MGMT_MODE_RD, "hw_tag", "0x%x", io->hw_tag);
|
|
retval = 0;
|
|
} else if (ocs_strcmp(unqualified_name, "tag") == 0) {
|
|
ocs_mgmt_emit_int(textbuf, MGMT_MODE_RD, "tag", "0x%x", io->tag);
|
|
retval = 0;
|
|
} else if (ocs_strcmp(unqualified_name, "transferred") == 0) {
|
|
ocs_mgmt_emit_int(textbuf, MGMT_MODE_RD, "transferred", "%zu", io->transferred);
|
|
retval = 0;
|
|
} else if (ocs_strcmp(unqualified_name, "auto_resp") == 0) {
|
|
ocs_mgmt_emit_boolean(textbuf, MGMT_MODE_RD, "auto_resp", io->auto_resp);
|
|
retval = 0;
|
|
} else if (ocs_strcmp(unqualified_name, "exp_xfer_len") == 0) {
|
|
ocs_mgmt_emit_int(textbuf, MGMT_MODE_RD, "exp_xfer_len", "%d", io->exp_xfer_len);
|
|
retval = 0;
|
|
} else if (ocs_strcmp(unqualified_name, "xfer_req") == 0) {
|
|
ocs_mgmt_emit_int(textbuf, MGMT_MODE_RD, "xfer_req", "%d", io->xfer_req);
|
|
retval = 0;
|
|
}
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
void
|
|
ocs_mgmt_io_get_all(ocs_textbuf_t *textbuf, void *object)
|
|
{
|
|
ocs_io_t *io = (ocs_io_t *) object;
|
|
|
|
ocs_mgmt_emit_string(textbuf, MGMT_MODE_RD, "display_name", io->display_name);
|
|
ocs_mgmt_emit_int(textbuf, MGMT_MODE_RD, "init_task_tag", "0x%x", io->init_task_tag);
|
|
ocs_mgmt_emit_int(textbuf, MGMT_MODE_RD, "tgt_task_tag", "0x%x", io->tgt_task_tag);
|
|
ocs_mgmt_emit_int(textbuf, MGMT_MODE_RD, "hw_tag", "0x%x", io->hw_tag);
|
|
ocs_mgmt_emit_int(textbuf, MGMT_MODE_RD, "tag", "0x%x", io->tag);
|
|
ocs_mgmt_emit_int(textbuf, MGMT_MODE_RD, "transferred", "%zu", io->transferred);
|
|
ocs_mgmt_emit_boolean(textbuf, MGMT_MODE_RD, "auto_resp", io->auto_resp);
|
|
ocs_mgmt_emit_int(textbuf, MGMT_MODE_RD, "exp_xfer_len", "%d", io->exp_xfer_len);
|
|
ocs_mgmt_emit_int(textbuf, MGMT_MODE_RD, "xfer_req", "%d", io->xfer_req);
|
|
|
|
}
|