aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/staging/octeon/cvmx-cmd-queue.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/staging/octeon/cvmx-cmd-queue.c')
-rw-r--r--drivers/staging/octeon/cvmx-cmd-queue.c306
1 files changed, 0 insertions, 306 deletions
diff --git a/drivers/staging/octeon/cvmx-cmd-queue.c b/drivers/staging/octeon/cvmx-cmd-queue.c
deleted file mode 100644
index e9809d375162..000000000000
--- a/drivers/staging/octeon/cvmx-cmd-queue.c
+++ /dev/null
@@ -1,306 +0,0 @@
-/***********************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 "cvmx-config.h"
-#include "cvmx-fpa.h"
-#include "cvmx-cmd-queue.h"
-
-#include <asm/octeon/cvmx-npei-defs.h>
-#include <asm/octeon/cvmx-pexp-defs.h>
-#include "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;
-
-/**
- * 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.cn58xx.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;
-}

Privacy Policy