diff options
Diffstat (limited to 'drivers/staging/octeon/cvmx-cmd-queue.c')
| -rw-r--r-- | drivers/staging/octeon/cvmx-cmd-queue.c | 306 |
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 e9809d3..0000000 --- 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; -} |