Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
David Daney | 1070 | 94.36% | 2 | 28.57% |
Janne Huttunen | 40 | 3.53% | 1 | 14.29% |
Aaro Koskinen | 21 | 1.85% | 2 | 28.57% |
Linus Torvalds | 2 | 0.18% | 1 | 14.29% |
Lucas De Marchi | 1 | 0.09% | 1 | 14.29% |
Total | 1134 | 7 |
/***********************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"; } /** * 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 */ static 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; case 4: return port + 40; case 5: return port + 44; } 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 if (ipd_port < 44) return 4; else if (ipd_port < 48) return 5; 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 if (ipd_port < 44) return ipd_port & 3; else if (ipd_port < 48) 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);
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