diff options
Diffstat (limited to 'arch/mips/cavium-octeon/executive/cvmx-pko.c')
| -rw-r--r-- | arch/mips/cavium-octeon/executive/cvmx-pko.c | 506 |
1 files changed, 506 insertions, 0 deletions
diff --git a/arch/mips/cavium-octeon/executive/cvmx-pko.c b/arch/mips/cavium-octeon/executive/cvmx-pko.c new file mode 100644 index 000000000000..f557084b1092 --- /dev/null +++ b/arch/mips/cavium-octeon/executive/cvmx-pko.c @@ -0,0 +1,506 @@ +/***********************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 library for the hardware Packet Output unit. + */ + +#include <asm/octeon/octeon.h> + +#include <asm/octeon/cvmx-config.h> +#include <asm/octeon/cvmx-pko.h> +#include <asm/octeon/cvmx-helper.h> + +/** + * Internal state of packet output + */ + +/** + * Call before any other calls to initialize the packet + * output system. This does chip global config, and should only be + * done by one core. + */ + +void cvmx_pko_initialize_global(void) +{ + int i; + uint64_t priority = 8; + union cvmx_pko_reg_cmd_buf config; + + /* + * Set the size of the PKO command buffers to an odd number of + * 64bit words. This allows the normal two word send to stay + * aligned and never span a comamnd word buffer. + */ + config.u64 = 0; + config.s.pool = CVMX_FPA_OUTPUT_BUFFER_POOL; + config.s.size = CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE / 8 - 1; + + cvmx_write_csr(CVMX_PKO_REG_CMD_BUF, config.u64); + + for (i = 0; i < CVMX_PKO_MAX_OUTPUT_QUEUES; i++) + cvmx_pko_config_port(CVMX_PKO_MEM_QUEUE_PTRS_ILLEGAL_PID, i, 1, + &priority); + + /* + * If we aren't using all of the queues optimize PKO's + * internal memory. + */ + if (OCTEON_IS_MODEL(OCTEON_CN38XX) || OCTEON_IS_MODEL(OCTEON_CN58XX) + || OCTEON_IS_MODEL(OCTEON_CN56XX) + || OCTEON_IS_MODEL(OCTEON_CN52XX)) { + int num_interfaces = cvmx_helper_get_number_of_interfaces(); + int last_port = + cvmx_helper_get_last_ipd_port(num_interfaces - 1); + int max_queues = + cvmx_pko_get_base_queue(last_port) + + cvmx_pko_get_num_queues(last_port); + if (OCTEON_IS_MODEL(OCTEON_CN38XX)) { + if (max_queues <= 32) + cvmx_write_csr(CVMX_PKO_REG_QUEUE_MODE, 2); + else if (max_queues <= 64) + cvmx_write_csr(CVMX_PKO_REG_QUEUE_MODE, 1); + } else { + if (max_queues <= 64) + cvmx_write_csr(CVMX_PKO_REG_QUEUE_MODE, 2); + else if (max_queues <= 128) + cvmx_write_csr(CVMX_PKO_REG_QUEUE_MODE, 1); + } + } +} + +/** + * This function does per-core initialization required by the PKO routines. + * This must be called on all cores that will do packet output, and must + * be called after the FPA has been initialized and filled with pages. + * + * Returns 0 on success + * !0 on failure + */ +int cvmx_pko_initialize_local(void) +{ + /* Nothing to do */ + return 0; +} + +/** + * Enables the packet output hardware. It must already be + * configured. + */ +void cvmx_pko_enable(void) +{ + union cvmx_pko_reg_flags flags; + + flags.u64 = cvmx_read_csr(CVMX_PKO_REG_FLAGS); + if (flags.s.ena_pko) + cvmx_dprintf + ("Warning: Enabling PKO when PKO already enabled.\n"); + + flags.s.ena_dwb = 1; + flags.s.ena_pko = 1; + /* + * always enable big endian for 3-word command. Does nothing + * for 2-word. + */ + flags.s.store_be = 1; + cvmx_write_csr(CVMX_PKO_REG_FLAGS, flags.u64); +} + +/** + * Disables the packet output. Does not affect any configuration. + */ +void cvmx_pko_disable(void) +{ + union cvmx_pko_reg_flags pko_reg_flags; + pko_reg_flags.u64 = cvmx_read_csr(CVMX_PKO_REG_FLAGS); + pko_reg_flags.s.ena_pko = 0; + cvmx_write_csr(CVMX_PKO_REG_FLAGS, pko_reg_flags.u64); +} + + +/** + * Reset the packet output. + */ +static void __cvmx_pko_reset(void) +{ + union cvmx_pko_reg_flags pko_reg_flags; + pko_reg_flags.u64 = cvmx_read_csr(CVMX_PKO_REG_FLAGS); + pko_reg_flags.s.reset = 1; + cvmx_write_csr(CVMX_PKO_REG_FLAGS, pko_reg_flags.u64); +} + +/** + * Shutdown and free resources required by packet output. + */ +void cvmx_pko_shutdown(void) +{ + union cvmx_pko_mem_queue_ptrs config; + int queue; + + cvmx_pko_disable(); + + for (queue = 0; queue < CVMX_PKO_MAX_OUTPUT_QUEUES; queue++) { + config.u64 = 0; + config.s.tail = 1; + config.s.index = 0; + config.s.port = CVMX_PKO_MEM_QUEUE_PTRS_ILLEGAL_PID; + config.s.queue = queue & 0x7f; + config.s.qos_mask = 0; + config.s.buf_ptr = 0; + if (!OCTEON_IS_MODEL(OCTEON_CN3XXX)) { + union cvmx_pko_reg_queue_ptrs1 config1; + config1.u64 = 0; + config1.s.qid7 = queue >> 7; + cvmx_write_csr(CVMX_PKO_REG_QUEUE_PTRS1, config1.u64); + } + cvmx_write_csr(CVMX_PKO_MEM_QUEUE_PTRS, config.u64); + cvmx_cmd_queue_shutdown(CVMX_CMD_QUEUE_PKO(queue)); + } + __cvmx_pko_reset(); +} + +/** + * Configure a output port and the associated queues for use. + * + * @port: Port to configure. + * @base_queue: First queue number to associate with this port. + * @num_queues: Number of queues to associate with this port + * @priority: Array of priority levels for each queue. Values are + * allowed to be 0-8. A value of 8 get 8 times the traffic + * of a value of 1. A value of 0 indicates that no rounds + * will be participated in. These priorities can be changed + * on the fly while the pko is enabled. A priority of 9 + * indicates that static priority should be used. If static + * priority is used all queues with static priority must be + * contiguous starting at the base_queue, and lower numbered + * queues have higher priority than higher numbered queues. + * There must be num_queues elements in the array. + */ +cvmx_pko_status_t cvmx_pko_config_port(uint64_t port, uint64_t base_queue, + uint64_t num_queues, + const uint64_t priority[]) +{ + cvmx_pko_status_t result_code; + uint64_t queue; + union cvmx_pko_mem_queue_ptrs config; + union cvmx_pko_reg_queue_ptrs1 config1; + int static_priority_base = -1; + int static_priority_end = -1; + + if ((port >= CVMX_PKO_NUM_OUTPUT_PORTS) + && (port != CVMX_PKO_MEM_QUEUE_PTRS_ILLEGAL_PID)) { + cvmx_dprintf("ERROR: cvmx_pko_config_port: Invalid port %llu\n", + (unsigned long long)port); + return CVMX_PKO_INVALID_PORT; + } + + if (base_queue + num_queues > CVMX_PKO_MAX_OUTPUT_QUEUES) { + cvmx_dprintf + ("ERROR: cvmx_pko_config_port: Invalid queue range %llu\n", + (unsigned long long)(base_queue + num_queues)); + return CVMX_PKO_INVALID_QUEUE; + } + + if (port != CVMX_PKO_MEM_QUEUE_PTRS_ILLEGAL_PID) { + /* + * Validate the static queue priority setup and set + * static_priority_base and static_priority_end + * accordingly. + */ + for (queue = 0; queue < num_queues; queue++) { + /* Find first queue of static priority */ + if (static_priority_base == -1 + && priority[queue] == + CVMX_PKO_QUEUE_STATIC_PRIORITY) + static_priority_base = queue; + /* Find last queue of static priority */ + if (static_priority_base != -1 + && static_priority_end == -1 + && priority[queue] != CVMX_PKO_QUEUE_STATIC_PRIORITY + && queue) + static_priority_end = queue - 1; + else if (static_priority_base != -1 + && static_priority_end == -1 + && queue == num_queues - 1) + /* all queues are static priority */ + static_priority_end = queue; + /* + * Check to make sure all static priority + * queues are contiguous. Also catches some + * cases of static priorites not starting at + * queue 0. + */ + if (static_priority_end != -1 + && (int)queue > static_priority_end + && priority[queue] == + CVMX_PKO_QUEUE_STATIC_PRIORITY) { + cvmx_dprintf("ERROR: cvmx_pko_config_port: " + "Static priority queues aren't " + "contiguous or don't start at " + "base queue. q: %d, eq: %d\n", + (int)queue, static_priority_end); + return CVMX_PKO_INVALID_PRIORITY; + } + } + if (static_priority_base > 0) { + cvmx_dprintf("ERROR: cvmx_pko_config_port: Static " + "priority queues don't start at base " + "queue. sq: %d\n", + static_priority_base); + return CVMX_PKO_INVALID_PRIORITY; + } +#if 0 + cvmx_dprintf("Port %d: Static priority queue base: %d, " + "end: %d\n", port, + static_priority_base, static_priority_end); +#endif + } + /* + * At this point, static_priority_base and static_priority_end + * are either both -1, or are valid start/end queue + * numbers. + */ + + result_code = CVMX_PKO_SUCCESS; + +#ifdef PKO_DEBUG + cvmx_dprintf("num queues: %d (%lld,%lld)\n", num_queues, + CVMX_PKO_QUEUES_PER_PORT_INTERFACE0, + CVMX_PKO_QUEUES_PER_PORT_INTERFACE1); +#endif + + for (queue = 0; queue < num_queues; queue++) { + uint64_t *buf_ptr = NULL; + + config1.u64 = 0; + config1.s.idx3 = queue >> 3; + config1.s.qid7 = (base_queue + queue) >> 7; + + config.u64 = 0; + config.s.tail = queue == (num_queues - 1); + config.s.index = queue; + config.s.port = port; + config.s.queue = base_queue + queue; + + if (!cvmx_octeon_is_pass1()) { + config.s.static_p = static_priority_base >= 0; + config.s.static_q = (int)queue <= static_priority_end; + config.s.s_tail = (int)queue == static_priority_end; + } + /* + * Convert the priority into an enable bit field. Try + * to space the bits out evenly so the packet don't + * get grouped up + */ + switch ((int)priority[queue]) { + case 0: + config.s.qos_mask = 0x00; + break; + case 1: + config.s.qos_mask = 0x01; + break; + case 2: + config.s.qos_mask = 0x11; + break; + case 3: + config.s.qos_mask = 0x49; + break; + case 4: + config.s.qos_mask = 0x55; + break; + case 5: + config.s.qos_mask = 0x57; + break; + case 6: + config.s.qos_mask = 0x77; + break; + case 7: + config.s.qos_mask = 0x7f; + break; + case 8: + config.s.qos_mask = 0xff; + break; + case CVMX_PKO_QUEUE_STATIC_PRIORITY: + /* Pass 1 will fall through to the error case */ + if (!cvmx_octeon_is_pass1()) { + config.s.qos_mask = 0xff; + break; + } + default: + cvmx_dprintf("ERROR: cvmx_pko_config_port: Invalid " + "priority %llu\n", + (unsigned long long)priority[queue]); + config.s.qos_mask = 0xff; + result_code = CVMX_PKO_INVALID_PRIORITY; + break; + } + + if (port != CVMX_PKO_MEM_QUEUE_PTRS_ILLEGAL_PID) { + cvmx_cmd_queue_result_t cmd_res = + cvmx_cmd_queue_initialize(CVMX_CMD_QUEUE_PKO + (base_queue + queue), + CVMX_PKO_MAX_QUEUE_DEPTH, + CVMX_FPA_OUTPUT_BUFFER_POOL, + CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE + - + CVMX_PKO_COMMAND_BUFFER_SIZE_ADJUST + * 8); + if (cmd_res != CVMX_CMD_QUEUE_SUCCESS) { + switch (cmd_res) { + case CVMX_CMD_QUEUE_NO_MEMORY: + cvmx_dprintf("ERROR: " + "cvmx_pko_config_port: " + "Unable to allocate " + "output buffer.\n"); + return CVMX_PKO_NO_MEMORY; + case CVMX_CMD_QUEUE_ALREADY_SETUP: + cvmx_dprintf + ("ERROR: cvmx_pko_config_port: Port already setup.\n"); + return CVMX_PKO_PORT_ALREADY_SETUP; + case CVMX_CMD_QUEUE_INVALID_PARAM: + default: + cvmx_dprintf + ("ERROR: cvmx_pko_config_port: Command queue initialization failed.\n"); + return CVMX_PKO_CMD_QUEUE_INIT_ERROR; + } + } + + buf_ptr = + (uint64_t *) + cvmx_cmd_queue_buffer(CVMX_CMD_QUEUE_PKO + (base_queue + queue)); + config.s.buf_ptr = cvmx_ptr_to_phys(buf_ptr); + } else + config.s.buf_ptr = 0; + + CVMX_SYNCWS; + + if (!OCTEON_IS_MODEL(OCTEON_CN3XXX)) + cvmx_write_csr(CVMX_PKO_REG_QUEUE_PTRS1, config1.u64); + cvmx_write_csr(CVMX_PKO_MEM_QUEUE_PTRS, config.u64); + } + + return result_code; +} + +#ifdef PKO_DEBUG +/** + * Show map of ports -> queues for different cores. + */ +void cvmx_pko_show_queue_map() +{ + int core, port; + int pko_output_ports = 36; + + cvmx_dprintf("port"); + for (port = 0; port < pko_output_ports; port++) + cvmx_dprintf("%3d ", port); + cvmx_dprintf("\n"); + + for (core = 0; core < CVMX_MAX_CORES; core++) { + cvmx_dprintf("\n%2d: ", core); + for (port = 0; port < pko_output_ports; port++) { + cvmx_dprintf("%3d ", + cvmx_pko_get_base_queue_per_core(port, + core)); + } + } + cvmx_dprintf("\n"); +} +#endif + +/** + * Rate limit a PKO port to a max packets/sec. This function is only + * supported on CN51XX and higher, excluding CN58XX. + * + * @port: Port to rate limit + * @packets_s: Maximum packet/sec + * @burst: Maximum number of packets to burst in a row before rate + * limiting cuts in. + * + * Returns Zero on success, negative on failure + */ +int cvmx_pko_rate_limit_packets(int port, int packets_s, int burst) +{ + union cvmx_pko_mem_port_rate0 pko_mem_port_rate0; + union cvmx_pko_mem_port_rate1 pko_mem_port_rate1; + + pko_mem_port_rate0.u64 = 0; + pko_mem_port_rate0.s.pid = port; + pko_mem_port_rate0.s.rate_pkt = + cvmx_sysinfo_get()->cpu_clock_hz / packets_s / 16; + /* No cost per word since we are limited by packets/sec, not bits/sec */ + pko_mem_port_rate0.s.rate_word = 0; + + pko_mem_port_rate1.u64 = 0; + pko_mem_port_rate1.s.pid = port; + pko_mem_port_rate1.s.rate_lim = + ((uint64_t) pko_mem_port_rate0.s.rate_pkt * burst) >> 8; + + cvmx_write_csr(CVMX_PKO_MEM_PORT_RATE0, pko_mem_port_rate0.u64); + cvmx_write_csr(CVMX_PKO_MEM_PORT_RATE1, pko_mem_port_rate1.u64); + return 0; +} + +/** + * Rate limit a PKO port to a max bits/sec. This function is only + * supported on CN51XX and higher, excluding CN58XX. + * + * @port: Port to rate limit + * @bits_s: PKO rate limit in bits/sec + * @burst: Maximum number of bits to burst before rate + * limiting cuts in. + * + * Returns Zero on success, negative on failure + */ +int cvmx_pko_rate_limit_bits(int port, uint64_t bits_s, int burst) +{ + union cvmx_pko_mem_port_rate0 pko_mem_port_rate0; + union cvmx_pko_mem_port_rate1 pko_mem_port_rate1; + uint64_t clock_rate = cvmx_sysinfo_get()->cpu_clock_hz; + uint64_t tokens_per_bit = clock_rate * 16 / bits_s; + + pko_mem_port_rate0.u64 = 0; + pko_mem_port_rate0.s.pid = port; + /* + * Each packet has a 12 bytes of interframe gap, an 8 byte + * preamble, and a 4 byte CRC. These are not included in the + * per word count. Multiply by 8 to covert to bits and divide + * by 256 for limit granularity. + */ + pko_mem_port_rate0.s.rate_pkt = (12 + 8 + 4) * 8 * tokens_per_bit / 256; + /* Each 8 byte word has 64bits */ + pko_mem_port_rate0.s.rate_word = 64 * tokens_per_bit; + + pko_mem_port_rate1.u64 = 0; + pko_mem_port_rate1.s.pid = port; + pko_mem_port_rate1.s.rate_lim = tokens_per_bit * burst / 256; + + cvmx_write_csr(CVMX_PKO_MEM_PORT_RATE0, pko_mem_port_rate0.u64); + cvmx_write_csr(CVMX_PKO_MEM_PORT_RATE1, pko_mem_port_rate1.u64); + return 0; +} |