diff options
Diffstat (limited to 'arch/mips/cavium-octeon/executive/cvmx-helper-util.c')
| -rw-r--r-- | arch/mips/cavium-octeon/executive/cvmx-helper-util.c | 437 |
1 files changed, 437 insertions, 0 deletions
diff --git a/arch/mips/cavium-octeon/executive/cvmx-helper-util.c b/arch/mips/cavium-octeon/executive/cvmx-helper-util.c new file mode 100644 index 000000000..453d7f664 --- /dev/null +++ b/arch/mips/cavium-octeon/executive/cvmx-helper-util.c @@ -0,0 +1,437 @@ +/***********************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**************************************/ + +/* + * Small helper utilities. + */ +#include <linux/kernel.h> + +#include <asm/octeon/octeon.h> + +#include <asm/octeon/cvmx-config.h> + +#include <asm/octeon/cvmx-fpa.h> +#include <asm/octeon/cvmx-pip.h> +#include <asm/octeon/cvmx-pko.h> +#include <asm/octeon/cvmx-ipd.h> +#include <asm/octeon/cvmx-spi.h> + +#include <asm/octeon/cvmx-helper.h> +#include <asm/octeon/cvmx-helper-util.h> + +#include <asm/octeon/cvmx-ipd-defs.h> + +/** + * Convert a interface mode into a human readable string + * + * @mode: Mode to convert + * + * Returns String + */ +const char *cvmx_helper_interface_mode_to_string(cvmx_helper_interface_mode_t + mode) +{ + switch (mode) { + case CVMX_HELPER_INTERFACE_MODE_DISABLED: + return "DISABLED"; + case CVMX_HELPER_INTERFACE_MODE_RGMII: + return "RGMII"; + case CVMX_HELPER_INTERFACE_MODE_GMII: + return "GMII"; + case CVMX_HELPER_INTERFACE_MODE_SPI: + return "SPI"; + case CVMX_HELPER_INTERFACE_MODE_PCIE: + return "PCIE"; + case CVMX_HELPER_INTERFACE_MODE_XAUI: + return "XAUI"; + case CVMX_HELPER_INTERFACE_MODE_SGMII: + return "SGMII"; + case CVMX_HELPER_INTERFACE_MODE_PICMG: + return "PICMG"; + case CVMX_HELPER_INTERFACE_MODE_NPI: + return "NPI"; + case CVMX_HELPER_INTERFACE_MODE_LOOP: + return "LOOP"; + } + return "UNKNOWN"; +} + +/** + * Debug routine to dump the packet structure to the console + * + * @work: Work queue entry containing the packet to dump + * Returns + */ +int cvmx_helper_dump_packet(cvmx_wqe_t *work) +{ + uint64_t count; + uint64_t remaining_bytes; + union cvmx_buf_ptr buffer_ptr; + uint64_t start_of_buffer; + uint8_t *data_address; + uint8_t *end_of_data; + + cvmx_dprintf("Packet Length: %u\n", work->len); + cvmx_dprintf(" Input Port: %u\n", work->ipprt); + cvmx_dprintf(" QoS: %u\n", work->qos); + cvmx_dprintf(" Buffers: %u\n", work->word2.s.bufs); + + if (work->word2.s.bufs == 0) { + union cvmx_ipd_wqe_fpa_queue wqe_pool; + wqe_pool.u64 = cvmx_read_csr(CVMX_IPD_WQE_FPA_QUEUE); + buffer_ptr.u64 = 0; + buffer_ptr.s.pool = wqe_pool.s.wqe_pool; + buffer_ptr.s.size = 128; + buffer_ptr.s.addr = cvmx_ptr_to_phys(work->packet_data); + if (likely(!work->word2.s.not_IP)) { + union cvmx_pip_ip_offset pip_ip_offset; + pip_ip_offset.u64 = cvmx_read_csr(CVMX_PIP_IP_OFFSET); + buffer_ptr.s.addr += + (pip_ip_offset.s.offset << 3) - + work->word2.s.ip_offset; + buffer_ptr.s.addr += (work->word2.s.is_v6 ^ 1) << 2; + } else { + /* + * WARNING: This code assumes that the packet + * is not RAW. If it was, we would use + * PIP_GBL_CFG[RAW_SHF] instead of + * PIP_GBL_CFG[NIP_SHF]. + */ + union cvmx_pip_gbl_cfg pip_gbl_cfg; + pip_gbl_cfg.u64 = cvmx_read_csr(CVMX_PIP_GBL_CFG); + buffer_ptr.s.addr += pip_gbl_cfg.s.nip_shf; + } + } else + buffer_ptr = work->packet_ptr; + remaining_bytes = work->len; + + while (remaining_bytes) { + start_of_buffer = + ((buffer_ptr.s.addr >> 7) - buffer_ptr.s.back) << 7; + cvmx_dprintf(" Buffer Start:%llx\n", + (unsigned long long)start_of_buffer); + cvmx_dprintf(" Buffer I : %u\n", buffer_ptr.s.i); + cvmx_dprintf(" Buffer Back: %u\n", buffer_ptr.s.back); + cvmx_dprintf(" Buffer Pool: %u\n", buffer_ptr.s.pool); + cvmx_dprintf(" Buffer Data: %llx\n", + (unsigned long long)buffer_ptr.s.addr); + cvmx_dprintf(" Buffer Size: %u\n", buffer_ptr.s.size); + + cvmx_dprintf("\t\t"); + data_address = (uint8_t *) cvmx_phys_to_ptr(buffer_ptr.s.addr); + end_of_data = data_address + buffer_ptr.s.size; + count = 0; + while (data_address < end_of_data) { + if (remaining_bytes == 0) + break; + else + remaining_bytes--; + cvmx_dprintf("%02x", (unsigned int)*data_address); + data_address++; + if (remaining_bytes && (count == 7)) { + cvmx_dprintf("\n\t\t"); + count = 0; + } else + count++; + } + cvmx_dprintf("\n"); + + if (remaining_bytes) + buffer_ptr = *(union cvmx_buf_ptr *) + cvmx_phys_to_ptr(buffer_ptr.s.addr - 8); + } + return 0; +} + +/** + * Setup Random Early Drop on a specific input queue + * + * @queue: Input queue to setup RED on (0-7) + * @pass_thresh: + * Packets will begin slowly dropping when there are less than + * this many packet buffers free in FPA 0. + * @drop_thresh: + * All incoming packets will be dropped when there are less + * than this many free packet buffers in FPA 0. + * Returns Zero on success. Negative on failure + */ +int cvmx_helper_setup_red_queue(int queue, int pass_thresh, int drop_thresh) +{ + union cvmx_ipd_qosx_red_marks red_marks; + union cvmx_ipd_red_quex_param red_param; + + /* Set RED to begin dropping packets when there are pass_thresh buffers + left. It will linearly drop more packets until reaching drop_thresh + buffers */ + red_marks.u64 = 0; + red_marks.s.drop = drop_thresh; + red_marks.s.pass = pass_thresh; + cvmx_write_csr(CVMX_IPD_QOSX_RED_MARKS(queue), red_marks.u64); + + /* Use the actual queue 0 counter, not the average */ + red_param.u64 = 0; + red_param.s.prb_con = + (255ul << 24) / (red_marks.s.pass - red_marks.s.drop); + red_param.s.avg_con = 1; + red_param.s.new_con = 255; + red_param.s.use_pcnt = 1; + cvmx_write_csr(CVMX_IPD_RED_QUEX_PARAM(queue), red_param.u64); + return 0; +} + +/** + * Setup Random Early Drop to automatically begin dropping packets. + * + * @pass_thresh: + * Packets will begin slowly dropping when there are less than + * this many packet buffers free in FPA 0. + * @drop_thresh: + * All incoming packets will be dropped when there are less + * than this many free packet buffers in FPA 0. + * Returns Zero on success. Negative on failure + */ +int cvmx_helper_setup_red(int pass_thresh, int drop_thresh) +{ + union cvmx_ipd_portx_bp_page_cnt page_cnt; + union cvmx_ipd_bp_prt_red_end ipd_bp_prt_red_end; + union cvmx_ipd_red_port_enable red_port_enable; + int queue; + int interface; + int port; + + /* Disable backpressure based on queued buffers. It needs SW support */ + page_cnt.u64 = 0; + page_cnt.s.bp_enb = 0; + page_cnt.s.page_cnt = 100; + for (interface = 0; interface < 2; interface++) { + for (port = cvmx_helper_get_first_ipd_port(interface); + port < cvmx_helper_get_last_ipd_port(interface); port++) + cvmx_write_csr(CVMX_IPD_PORTX_BP_PAGE_CNT(port), + page_cnt.u64); + } + + for (queue = 0; queue < 8; queue++) + cvmx_helper_setup_red_queue(queue, pass_thresh, drop_thresh); + + /* Shutoff the dropping based on the per port page count. SW isn't + decrementing it right now */ + ipd_bp_prt_red_end.u64 = 0; + ipd_bp_prt_red_end.s.prt_enb = 0; + cvmx_write_csr(CVMX_IPD_BP_PRT_RED_END, ipd_bp_prt_red_end.u64); + + red_port_enable.u64 = 0; + red_port_enable.s.prt_enb = 0xfffffffffull; + red_port_enable.s.avg_dly = 10000; + red_port_enable.s.prb_dly = 10000; + cvmx_write_csr(CVMX_IPD_RED_PORT_ENABLE, red_port_enable.u64); + + return 0; +} +EXPORT_SYMBOL_GPL(cvmx_helper_setup_red); + +/** + * Setup the common GMX settings that determine the number of + * ports. These setting apply to almost all configurations of all + * chips. + * + * @interface: Interface to configure + * @num_ports: Number of ports on the interface + * + * Returns Zero on success, negative on failure + */ +int __cvmx_helper_setup_gmx(int interface, int num_ports) +{ + union cvmx_gmxx_tx_prts gmx_tx_prts; + union cvmx_gmxx_rx_prts gmx_rx_prts; + union cvmx_pko_reg_gmx_port_mode pko_mode; + union cvmx_gmxx_txx_thresh gmx_tx_thresh; + int index; + + /* Tell GMX the number of TX ports on this interface */ + gmx_tx_prts.u64 = cvmx_read_csr(CVMX_GMXX_TX_PRTS(interface)); + gmx_tx_prts.s.prts = num_ports; + cvmx_write_csr(CVMX_GMXX_TX_PRTS(interface), gmx_tx_prts.u64); + + /* Tell GMX the number of RX ports on this interface. This only + ** applies to *GMII and XAUI ports */ + if (cvmx_helper_interface_get_mode(interface) == + CVMX_HELPER_INTERFACE_MODE_RGMII + || cvmx_helper_interface_get_mode(interface) == + CVMX_HELPER_INTERFACE_MODE_SGMII + || cvmx_helper_interface_get_mode(interface) == + CVMX_HELPER_INTERFACE_MODE_GMII + || cvmx_helper_interface_get_mode(interface) == + CVMX_HELPER_INTERFACE_MODE_XAUI) { + if (num_ports > 4) { + cvmx_dprintf("__cvmx_helper_setup_gmx: Illegal " + "num_ports\n"); + return -1; + } + + gmx_rx_prts.u64 = cvmx_read_csr(CVMX_GMXX_RX_PRTS(interface)); + gmx_rx_prts.s.prts = num_ports; + cvmx_write_csr(CVMX_GMXX_RX_PRTS(interface), gmx_rx_prts.u64); + } + + /* Skip setting CVMX_PKO_REG_GMX_PORT_MODE on 30XX, 31XX, and 50XX */ + if (!OCTEON_IS_MODEL(OCTEON_CN30XX) && !OCTEON_IS_MODEL(OCTEON_CN31XX) + && !OCTEON_IS_MODEL(OCTEON_CN50XX)) { + /* Tell PKO the number of ports on this interface */ + pko_mode.u64 = cvmx_read_csr(CVMX_PKO_REG_GMX_PORT_MODE); + if (interface == 0) { + if (num_ports == 1) + pko_mode.s.mode0 = 4; + else if (num_ports == 2) + pko_mode.s.mode0 = 3; + else if (num_ports <= 4) + pko_mode.s.mode0 = 2; + else if (num_ports <= 8) + pko_mode.s.mode0 = 1; + else + pko_mode.s.mode0 = 0; + } else { + if (num_ports == 1) + pko_mode.s.mode1 = 4; + else if (num_ports == 2) + pko_mode.s.mode1 = 3; + else if (num_ports <= 4) + pko_mode.s.mode1 = 2; + else if (num_ports <= 8) + pko_mode.s.mode1 = 1; + else + pko_mode.s.mode1 = 0; + } + cvmx_write_csr(CVMX_PKO_REG_GMX_PORT_MODE, pko_mode.u64); + } + + /* + * Set GMX to buffer as much data as possible before starting + * transmit. This reduces the chances that we have a TX under + * run due to memory contention. Any packet that fits entirely + * in the GMX FIFO can never have an under run regardless of + * memory load. + */ + gmx_tx_thresh.u64 = cvmx_read_csr(CVMX_GMXX_TXX_THRESH(0, interface)); + if (OCTEON_IS_MODEL(OCTEON_CN30XX) || OCTEON_IS_MODEL(OCTEON_CN31XX) + || OCTEON_IS_MODEL(OCTEON_CN50XX)) { + /* These chips have a fixed max threshold of 0x40 */ + gmx_tx_thresh.s.cnt = 0x40; + } else { + /* Choose the max value for the number of ports */ + if (num_ports <= 1) + gmx_tx_thresh.s.cnt = 0x100 / 1; + else if (num_ports == 2) + gmx_tx_thresh.s.cnt = 0x100 / 2; + else + gmx_tx_thresh.s.cnt = 0x100 / 4; + } + /* + * SPI and XAUI can have lots of ports but the GMX hardware + * only ever has a max of 4. + */ + if (num_ports > 4) + num_ports = 4; + for (index = 0; index < num_ports; index++) + cvmx_write_csr(CVMX_GMXX_TXX_THRESH(index, interface), + gmx_tx_thresh.u64); + + return 0; +} + +/** + * Returns the IPD/PKO port number for a port on the given + * interface. + * + * @interface: Interface to use + * @port: Port on the interface + * + * Returns IPD/PKO port number + */ +int cvmx_helper_get_ipd_port(int interface, int port) +{ + switch (interface) { + case 0: + return port; + case 1: + return port + 16; + case 2: + return port + 32; + case 3: + return port + 36; + } + return -1; +} +EXPORT_SYMBOL_GPL(cvmx_helper_get_ipd_port); + +/** + * Returns the interface number for an IPD/PKO port number. + * + * @ipd_port: IPD/PKO port number + * + * Returns Interface number + */ +int cvmx_helper_get_interface_num(int ipd_port) +{ + if (ipd_port < 16) + return 0; + else if (ipd_port < 32) + return 1; + else if (ipd_port < 36) + return 2; + else if (ipd_port < 40) + return 3; + else + cvmx_dprintf("cvmx_helper_get_interface_num: Illegal IPD " + "port number\n"); + + return -1; +} +EXPORT_SYMBOL_GPL(cvmx_helper_get_interface_num); + +/** + * Returns the interface index number for an IPD/PKO port + * number. + * + * @ipd_port: IPD/PKO port number + * + * Returns Interface index number + */ +int cvmx_helper_get_interface_index_num(int ipd_port) +{ + if (ipd_port < 32) + return ipd_port & 15; + else if (ipd_port < 36) + return ipd_port & 3; + else if (ipd_port < 40) + return ipd_port & 3; + else + cvmx_dprintf("cvmx_helper_get_interface_index_num: " + "Illegal IPD port number\n"); + + return -1; +} +EXPORT_SYMBOL_GPL(cvmx_helper_get_interface_index_num); |