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Diffstat (limited to 'arch/mips/cavium-octeon/executive/cvmx-helper-fpa.c')
| -rw-r--r-- | arch/mips/cavium-octeon/executive/cvmx-helper-fpa.c | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/arch/mips/cavium-octeon/executive/cvmx-helper-fpa.c b/arch/mips/cavium-octeon/executive/cvmx-helper-fpa.c new file mode 100644 index 000000000000..c239e5f4ab9a --- /dev/null +++ b/arch/mips/cavium-octeon/executive/cvmx-helper-fpa.c @@ -0,0 +1,243 @@ +/***********************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**************************************/ + +/** + * @file + * + * Helper functions for FPA setup. + * + */ +#include "executive-config.h" +#include "cvmx-config.h" +#include "cvmx.h" +#include "cvmx-bootmem.h" +#include "cvmx-fpa.h" +#include "cvmx-helper-fpa.h" + +/** + * Allocate memory for and initialize a single FPA pool. + * + * @pool: Pool to initialize + * @buffer_size: Size of buffers to allocate in bytes + * @buffers: Number of buffers to put in the pool. Zero is allowed + * @name: String name of the pool for debugging purposes + * Returns Zero on success, non-zero on failure + */ +static int __cvmx_helper_initialize_fpa_pool(int pool, uint64_t buffer_size, + uint64_t buffers, const char *name) +{ + uint64_t current_num; + void *memory; + uint64_t align = CVMX_CACHE_LINE_SIZE; + + /* + * Align the allocation so that power of 2 size buffers are + * naturally aligned. + */ + while (align < buffer_size) + align = align << 1; + + if (buffers == 0) + return 0; + + current_num = cvmx_read_csr(CVMX_FPA_QUEX_AVAILABLE(pool)); + if (current_num) { + cvmx_dprintf("Fpa pool %d(%s) already has %llu buffers. " + "Skipping setup.\n", + pool, name, (unsigned long long)current_num); + return 0; + } + + memory = cvmx_bootmem_alloc(buffer_size * buffers, align); + if (memory == NULL) { + cvmx_dprintf("Out of memory initializing fpa pool %d(%s).\n", + pool, name); + return -1; + } + cvmx_fpa_setup_pool(pool, name, memory, buffer_size, buffers); + return 0; +} + +/** + * Allocate memory and initialize the FPA pools using memory + * from cvmx-bootmem. Specifying zero for the number of + * buffers will cause that FPA pool to not be setup. This is + * useful if you aren't using some of the hardware and want + * to save memory. Use cvmx_helper_initialize_fpa instead of + * this function directly. + * + * @pip_pool: Should always be CVMX_FPA_PACKET_POOL + * @pip_size: Should always be CVMX_FPA_PACKET_POOL_SIZE + * @pip_buffers: + * Number of packet buffers. + * @wqe_pool: Should always be CVMX_FPA_WQE_POOL + * @wqe_size: Should always be CVMX_FPA_WQE_POOL_SIZE + * @wqe_entries: + * Number of work queue entries + * @pko_pool: Should always be CVMX_FPA_OUTPUT_BUFFER_POOL + * @pko_size: Should always be CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE + * @pko_buffers: + * PKO Command buffers. You should at minimum have two per + * each PKO queue. + * @tim_pool: Should always be CVMX_FPA_TIMER_POOL + * @tim_size: Should always be CVMX_FPA_TIMER_POOL_SIZE + * @tim_buffers: + * TIM ring buffer command queues. At least two per timer bucket + * is recommened. + * @dfa_pool: Should always be CVMX_FPA_DFA_POOL + * @dfa_size: Should always be CVMX_FPA_DFA_POOL_SIZE + * @dfa_buffers: + * DFA command buffer. A relatively small (32 for example) + * number should work. + * Returns Zero on success, non-zero if out of memory + */ +static int __cvmx_helper_initialize_fpa(int pip_pool, int pip_size, + int pip_buffers, int wqe_pool, + int wqe_size, int wqe_entries, + int pko_pool, int pko_size, + int pko_buffers, int tim_pool, + int tim_size, int tim_buffers, + int dfa_pool, int dfa_size, + int dfa_buffers) +{ + int status; + + cvmx_fpa_enable(); + + if ((pip_buffers > 0) && (pip_buffers <= 64)) + cvmx_dprintf + ("Warning: %d packet buffers may not be enough for hardware" + " prefetch. 65 or more is recommended.\n", pip_buffers); + + if (pip_pool >= 0) { + status = + __cvmx_helper_initialize_fpa_pool(pip_pool, pip_size, + pip_buffers, + "Packet Buffers"); + if (status) + return status; + } + + if (wqe_pool >= 0) { + status = + __cvmx_helper_initialize_fpa_pool(wqe_pool, wqe_size, + wqe_entries, + "Work Queue Entries"); + if (status) + return status; + } + + if (pko_pool >= 0) { + status = + __cvmx_helper_initialize_fpa_pool(pko_pool, pko_size, + pko_buffers, + "PKO Command Buffers"); + if (status) + return status; + } + + if (tim_pool >= 0) { + status = + __cvmx_helper_initialize_fpa_pool(tim_pool, tim_size, + tim_buffers, + "TIM Command Buffers"); + if (status) + return status; + } + + if (dfa_pool >= 0) { + status = + __cvmx_helper_initialize_fpa_pool(dfa_pool, dfa_size, + dfa_buffers, + "DFA Command Buffers"); + if (status) + return status; + } + + return 0; +} + +/** + * Allocate memory and initialize the FPA pools using memory + * from cvmx-bootmem. Sizes of each element in the pools is + * controlled by the cvmx-config.h header file. Specifying + * zero for any parameter will cause that FPA pool to not be + * setup. This is useful if you aren't using some of the + * hardware and want to save memory. + * + * @packet_buffers: + * Number of packet buffers to allocate + * @work_queue_entries: + * Number of work queue entries + * @pko_buffers: + * PKO Command buffers. You should at minimum have two per + * each PKO queue. + * @tim_buffers: + * TIM ring buffer command queues. At least two per timer bucket + * is recommened. + * @dfa_buffers: + * DFA command buffer. A relatively small (32 for example) + * number should work. + * Returns Zero on success, non-zero if out of memory + */ +int cvmx_helper_initialize_fpa(int packet_buffers, int work_queue_entries, + int pko_buffers, int tim_buffers, + int dfa_buffers) +{ +#ifndef CVMX_FPA_PACKET_POOL +#define CVMX_FPA_PACKET_POOL -1 +#define CVMX_FPA_PACKET_POOL_SIZE 0 +#endif +#ifndef CVMX_FPA_WQE_POOL +#define CVMX_FPA_WQE_POOL -1 +#define CVMX_FPA_WQE_POOL_SIZE 0 +#endif +#ifndef CVMX_FPA_OUTPUT_BUFFER_POOL +#define CVMX_FPA_OUTPUT_BUFFER_POOL -1 +#define CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE 0 +#endif +#ifndef CVMX_FPA_TIMER_POOL +#define CVMX_FPA_TIMER_POOL -1 +#define CVMX_FPA_TIMER_POOL_SIZE 0 +#endif +#ifndef CVMX_FPA_DFA_POOL +#define CVMX_FPA_DFA_POOL -1 +#define CVMX_FPA_DFA_POOL_SIZE 0 +#endif + return __cvmx_helper_initialize_fpa(CVMX_FPA_PACKET_POOL, + CVMX_FPA_PACKET_POOL_SIZE, + packet_buffers, CVMX_FPA_WQE_POOL, + CVMX_FPA_WQE_POOL_SIZE, + work_queue_entries, + CVMX_FPA_OUTPUT_BUFFER_POOL, + CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, + pko_buffers, CVMX_FPA_TIMER_POOL, + CVMX_FPA_TIMER_POOL_SIZE, + tim_buffers, CVMX_FPA_DFA_POOL, + CVMX_FPA_DFA_POOL_SIZE, + dfa_buffers); +} |