308 lines
9.3 KiB
C
308 lines
9.3 KiB
C
/***********************license start***************
|
|
* Author: Cavium Networks
|
|
*
|
|
* Contact: support@caviumnetworks.com
|
|
* This file is part of the OCTEON SDK
|
|
*
|
|
* Copyright (c) 2003-2008 Cavium Networks
|
|
*
|
|
* This file is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License, Version 2, as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This file is distributed in the hope that it will be useful, but
|
|
* AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
|
|
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
|
|
* NONINFRINGEMENT. See the GNU General Public License for more
|
|
* details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this file; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
* or visit http://www.gnu.org/licenses/.
|
|
*
|
|
* This file may also be available under a different license from Cavium.
|
|
* Contact Cavium Networks for more information
|
|
***********************license end**************************************/
|
|
|
|
/*
|
|
* Support functions for managing command queues used for
|
|
* various hardware blocks.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <asm/octeon/octeon.h>
|
|
|
|
#include <asm/octeon/cvmx-config.h>
|
|
#include <asm/octeon/cvmx-fpa.h>
|
|
#include <asm/octeon/cvmx-cmd-queue.h>
|
|
|
|
#include <asm/octeon/cvmx-npei-defs.h>
|
|
#include <asm/octeon/cvmx-pexp-defs.h>
|
|
#include <asm/octeon/cvmx-pko-defs.h>
|
|
|
|
/**
|
|
* This application uses this pointer to access the global queue
|
|
* state. It points to a bootmem named block.
|
|
*/
|
|
__cvmx_cmd_queue_all_state_t *__cvmx_cmd_queue_state_ptr;
|
|
EXPORT_SYMBOL_GPL(__cvmx_cmd_queue_state_ptr);
|
|
|
|
/**
|
|
* Initialize the Global queue state pointer.
|
|
*
|
|
* Returns CVMX_CMD_QUEUE_SUCCESS or a failure code
|
|
*/
|
|
static cvmx_cmd_queue_result_t __cvmx_cmd_queue_init_state_ptr(void)
|
|
{
|
|
char *alloc_name = "cvmx_cmd_queues";
|
|
#if defined(CONFIG_CAVIUM_RESERVE32) && CONFIG_CAVIUM_RESERVE32
|
|
extern uint64_t octeon_reserve32_memory;
|
|
#endif
|
|
|
|
if (likely(__cvmx_cmd_queue_state_ptr))
|
|
return CVMX_CMD_QUEUE_SUCCESS;
|
|
|
|
#if defined(CONFIG_CAVIUM_RESERVE32) && CONFIG_CAVIUM_RESERVE32
|
|
if (octeon_reserve32_memory)
|
|
__cvmx_cmd_queue_state_ptr =
|
|
cvmx_bootmem_alloc_named_range(sizeof(*__cvmx_cmd_queue_state_ptr),
|
|
octeon_reserve32_memory,
|
|
octeon_reserve32_memory +
|
|
(CONFIG_CAVIUM_RESERVE32 <<
|
|
20) - 1, 128, alloc_name);
|
|
else
|
|
#endif
|
|
__cvmx_cmd_queue_state_ptr =
|
|
cvmx_bootmem_alloc_named(sizeof(*__cvmx_cmd_queue_state_ptr),
|
|
128,
|
|
alloc_name);
|
|
if (__cvmx_cmd_queue_state_ptr)
|
|
memset(__cvmx_cmd_queue_state_ptr, 0,
|
|
sizeof(*__cvmx_cmd_queue_state_ptr));
|
|
else {
|
|
struct cvmx_bootmem_named_block_desc *block_desc =
|
|
cvmx_bootmem_find_named_block(alloc_name);
|
|
if (block_desc)
|
|
__cvmx_cmd_queue_state_ptr =
|
|
cvmx_phys_to_ptr(block_desc->base_addr);
|
|
else {
|
|
cvmx_dprintf
|
|
("ERROR: cvmx_cmd_queue_initialize: Unable to get named block %s.\n",
|
|
alloc_name);
|
|
return CVMX_CMD_QUEUE_NO_MEMORY;
|
|
}
|
|
}
|
|
return CVMX_CMD_QUEUE_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* Initialize a command queue for use. The initial FPA buffer is
|
|
* allocated and the hardware unit is configured to point to the
|
|
* new command queue.
|
|
*
|
|
* @queue_id: Hardware command queue to initialize.
|
|
* @max_depth: Maximum outstanding commands that can be queued.
|
|
* @fpa_pool: FPA pool the command queues should come from.
|
|
* @pool_size: Size of each buffer in the FPA pool (bytes)
|
|
*
|
|
* Returns CVMX_CMD_QUEUE_SUCCESS or a failure code
|
|
*/
|
|
cvmx_cmd_queue_result_t cvmx_cmd_queue_initialize(cvmx_cmd_queue_id_t queue_id,
|
|
int max_depth, int fpa_pool,
|
|
int pool_size)
|
|
{
|
|
__cvmx_cmd_queue_state_t *qstate;
|
|
cvmx_cmd_queue_result_t result = __cvmx_cmd_queue_init_state_ptr();
|
|
if (result != CVMX_CMD_QUEUE_SUCCESS)
|
|
return result;
|
|
|
|
qstate = __cvmx_cmd_queue_get_state(queue_id);
|
|
if (qstate == NULL)
|
|
return CVMX_CMD_QUEUE_INVALID_PARAM;
|
|
|
|
/*
|
|
* We artificially limit max_depth to 1<<20 words. It is an
|
|
* arbitrary limit.
|
|
*/
|
|
if (CVMX_CMD_QUEUE_ENABLE_MAX_DEPTH) {
|
|
if ((max_depth < 0) || (max_depth > 1 << 20))
|
|
return CVMX_CMD_QUEUE_INVALID_PARAM;
|
|
} else if (max_depth != 0)
|
|
return CVMX_CMD_QUEUE_INVALID_PARAM;
|
|
|
|
if ((fpa_pool < 0) || (fpa_pool > 7))
|
|
return CVMX_CMD_QUEUE_INVALID_PARAM;
|
|
if ((pool_size < 128) || (pool_size > 65536))
|
|
return CVMX_CMD_QUEUE_INVALID_PARAM;
|
|
|
|
/* See if someone else has already initialized the queue */
|
|
if (qstate->base_ptr_div128) {
|
|
if (max_depth != (int)qstate->max_depth) {
|
|
cvmx_dprintf("ERROR: cvmx_cmd_queue_initialize: "
|
|
"Queue already initialized with different "
|
|
"max_depth (%d).\n",
|
|
(int)qstate->max_depth);
|
|
return CVMX_CMD_QUEUE_INVALID_PARAM;
|
|
}
|
|
if (fpa_pool != qstate->fpa_pool) {
|
|
cvmx_dprintf("ERROR: cvmx_cmd_queue_initialize: "
|
|
"Queue already initialized with different "
|
|
"FPA pool (%u).\n",
|
|
qstate->fpa_pool);
|
|
return CVMX_CMD_QUEUE_INVALID_PARAM;
|
|
}
|
|
if ((pool_size >> 3) - 1 != qstate->pool_size_m1) {
|
|
cvmx_dprintf("ERROR: cvmx_cmd_queue_initialize: "
|
|
"Queue already initialized with different "
|
|
"FPA pool size (%u).\n",
|
|
(qstate->pool_size_m1 + 1) << 3);
|
|
return CVMX_CMD_QUEUE_INVALID_PARAM;
|
|
}
|
|
CVMX_SYNCWS;
|
|
return CVMX_CMD_QUEUE_ALREADY_SETUP;
|
|
} else {
|
|
union cvmx_fpa_ctl_status status;
|
|
void *buffer;
|
|
|
|
status.u64 = cvmx_read_csr(CVMX_FPA_CTL_STATUS);
|
|
if (!status.s.enb) {
|
|
cvmx_dprintf("ERROR: cvmx_cmd_queue_initialize: "
|
|
"FPA is not enabled.\n");
|
|
return CVMX_CMD_QUEUE_NO_MEMORY;
|
|
}
|
|
buffer = cvmx_fpa_alloc(fpa_pool);
|
|
if (buffer == NULL) {
|
|
cvmx_dprintf("ERROR: cvmx_cmd_queue_initialize: "
|
|
"Unable to allocate initial buffer.\n");
|
|
return CVMX_CMD_QUEUE_NO_MEMORY;
|
|
}
|
|
|
|
memset(qstate, 0, sizeof(*qstate));
|
|
qstate->max_depth = max_depth;
|
|
qstate->fpa_pool = fpa_pool;
|
|
qstate->pool_size_m1 = (pool_size >> 3) - 1;
|
|
qstate->base_ptr_div128 = cvmx_ptr_to_phys(buffer) / 128;
|
|
/*
|
|
* We zeroed the now serving field so we need to also
|
|
* zero the ticket.
|
|
*/
|
|
__cvmx_cmd_queue_state_ptr->
|
|
ticket[__cvmx_cmd_queue_get_index(queue_id)] = 0;
|
|
CVMX_SYNCWS;
|
|
return CVMX_CMD_QUEUE_SUCCESS;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Shutdown a queue a free it's command buffers to the FPA. The
|
|
* hardware connected to the queue must be stopped before this
|
|
* function is called.
|
|
*
|
|
* @queue_id: Queue to shutdown
|
|
*
|
|
* Returns CVMX_CMD_QUEUE_SUCCESS or a failure code
|
|
*/
|
|
cvmx_cmd_queue_result_t cvmx_cmd_queue_shutdown(cvmx_cmd_queue_id_t queue_id)
|
|
{
|
|
__cvmx_cmd_queue_state_t *qptr = __cvmx_cmd_queue_get_state(queue_id);
|
|
if (qptr == NULL) {
|
|
cvmx_dprintf("ERROR: cvmx_cmd_queue_shutdown: Unable to "
|
|
"get queue information.\n");
|
|
return CVMX_CMD_QUEUE_INVALID_PARAM;
|
|
}
|
|
|
|
if (cvmx_cmd_queue_length(queue_id) > 0) {
|
|
cvmx_dprintf("ERROR: cvmx_cmd_queue_shutdown: Queue still "
|
|
"has data in it.\n");
|
|
return CVMX_CMD_QUEUE_FULL;
|
|
}
|
|
|
|
__cvmx_cmd_queue_lock(queue_id, qptr);
|
|
if (qptr->base_ptr_div128) {
|
|
cvmx_fpa_free(cvmx_phys_to_ptr
|
|
((uint64_t) qptr->base_ptr_div128 << 7),
|
|
qptr->fpa_pool, 0);
|
|
qptr->base_ptr_div128 = 0;
|
|
}
|
|
__cvmx_cmd_queue_unlock(qptr);
|
|
|
|
return CVMX_CMD_QUEUE_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* Return the number of command words pending in the queue. This
|
|
* function may be relatively slow for some hardware units.
|
|
*
|
|
* @queue_id: Hardware command queue to query
|
|
*
|
|
* Returns Number of outstanding commands
|
|
*/
|
|
int cvmx_cmd_queue_length(cvmx_cmd_queue_id_t queue_id)
|
|
{
|
|
if (CVMX_ENABLE_PARAMETER_CHECKING) {
|
|
if (__cvmx_cmd_queue_get_state(queue_id) == NULL)
|
|
return CVMX_CMD_QUEUE_INVALID_PARAM;
|
|
}
|
|
|
|
/*
|
|
* The cast is here so gcc with check that all values in the
|
|
* cvmx_cmd_queue_id_t enumeration are here.
|
|
*/
|
|
switch ((cvmx_cmd_queue_id_t) (queue_id & 0xff0000)) {
|
|
case CVMX_CMD_QUEUE_PKO_BASE:
|
|
/*
|
|
* FIXME: Need atomic lock on
|
|
* CVMX_PKO_REG_READ_IDX. Right now we are normally
|
|
* called with the queue lock, so that is a SLIGHT
|
|
* amount of protection.
|
|
*/
|
|
cvmx_write_csr(CVMX_PKO_REG_READ_IDX, queue_id & 0xffff);
|
|
if (OCTEON_IS_MODEL(OCTEON_CN3XXX)) {
|
|
union cvmx_pko_mem_debug9 debug9;
|
|
debug9.u64 = cvmx_read_csr(CVMX_PKO_MEM_DEBUG9);
|
|
return debug9.cn38xx.doorbell;
|
|
} else {
|
|
union cvmx_pko_mem_debug8 debug8;
|
|
debug8.u64 = cvmx_read_csr(CVMX_PKO_MEM_DEBUG8);
|
|
return debug8.cn50xx.doorbell;
|
|
}
|
|
case CVMX_CMD_QUEUE_ZIP:
|
|
case CVMX_CMD_QUEUE_DFA:
|
|
case CVMX_CMD_QUEUE_RAID:
|
|
/* FIXME: Implement other lengths */
|
|
return 0;
|
|
case CVMX_CMD_QUEUE_DMA_BASE:
|
|
{
|
|
union cvmx_npei_dmax_counts dmax_counts;
|
|
dmax_counts.u64 =
|
|
cvmx_read_csr(CVMX_PEXP_NPEI_DMAX_COUNTS
|
|
(queue_id & 0x7));
|
|
return dmax_counts.s.dbell;
|
|
}
|
|
case CVMX_CMD_QUEUE_END:
|
|
return CVMX_CMD_QUEUE_INVALID_PARAM;
|
|
}
|
|
return CVMX_CMD_QUEUE_INVALID_PARAM;
|
|
}
|
|
|
|
/**
|
|
* Return the command buffer to be written to. The purpose of this
|
|
* function is to allow CVMX routine access t othe low level buffer
|
|
* for initial hardware setup. User applications should not call this
|
|
* function directly.
|
|
*
|
|
* @queue_id: Command queue to query
|
|
*
|
|
* Returns Command buffer or NULL on failure
|
|
*/
|
|
void *cvmx_cmd_queue_buffer(cvmx_cmd_queue_id_t queue_id)
|
|
{
|
|
__cvmx_cmd_queue_state_t *qptr = __cvmx_cmd_queue_get_state(queue_id);
|
|
if (qptr && qptr->base_ptr_div128)
|
|
return cvmx_phys_to_ptr((uint64_t) qptr->base_ptr_div128 << 7);
|
|
else
|
|
return NULL;
|
|
}
|