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Diffstat (limited to 'arch/mips/cavium-octeon/executive/cvmx-pko.c')
-rw-r--r--arch/mips/cavium-octeon/executive/cvmx-pko.c506
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 00000000000..f557084b109
--- /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;
+}
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-22 11:23:29 +0000