From: Aaron Williams Date: Thu, 7 Apr 2022 07:11:37 +0000 (+0200) Subject: mips: octeon: Add cvmx-pko3.c X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=0f64057b4fc362e6e52164fff1fbfb89a1640c9e;p=u-boot.git mips: octeon: Add cvmx-pko3.c Import cvmx-pko3.c from 2013 U-Boot. It will be used by the later added drivers to support networking on the MIPS Octeon II / III platforms. Signed-off-by: Aaron Williams Signed-off-by: Stefan Roese --- diff --git a/arch/mips/mach-octeon/cvmx-pko3.c b/arch/mips/mach-octeon/cvmx-pko3.c new file mode 100644 index 0000000000..d8ce02a271 --- /dev/null +++ b/arch/mips/mach-octeon/cvmx-pko3.c @@ -0,0 +1,786 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2018-2022 Marvell International Ltd. + */ + +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#include +#include +#include +#include + +static const int debug; + +#define CVMX_DUMP_REGX(reg) \ + if (debug) \ + debug("%s=%#llx\n", #reg, (long long)csr_rd_node(node, reg)) + +static int cvmx_pko_setup_macs(int node); + +/* + * PKO descriptor queue operation error string + * + * @param dqstatus is the enumeration returned from hardware, + * PKO_QUERY_RTN_S[DQSTATUS]. + * + * @return static constant string error description + */ +const char *pko_dqstatus_error(pko_query_dqstatus_t dqstatus) +{ + char *str = "PKO Undefined error"; + + switch (dqstatus) { + case PKO_DQSTATUS_PASS: + str = "No error"; + break; + case PKO_DQSTATUS_BADSTATE: + str = "PKO queue not ready"; + break; + case PKO_DQSTATUS_NOFPABUF: + str = "PKO failed to allocate buffer from FPA"; + break; + case PKO_DQSTATUS_NOPKOBUF: + str = "PKO out of buffers"; + break; + case PKO_DQSTATUS_FAILRTNPTR: + str = "PKO failed to return buffer to FPA"; + break; + case PKO_DQSTATUS_ALREADY: + str = "PKO queue already opened"; + break; + case PKO_DQSTATUS_NOTCREATED: + str = "PKO queue has not been created"; + break; + case PKO_DQSTATUS_NOTEMPTY: + str = "PKO queue is not empty"; + break; + case PKO_DQSTATUS_SENDPKTDROP: + str = "Illegal PKO command construct"; + break; + } + return str; +} + +/* + * PKO global initialization for 78XX. + * + * @param node is the node on which PKO block is initialized. + * @return none. + */ +int cvmx_pko3_hw_init_global(int node, uint16_t aura) +{ + cvmx_pko_dpfi_flush_t pko_flush; + cvmx_pko_dpfi_fpa_aura_t pko_aura; + cvmx_pko_dpfi_ena_t dpfi_enable; + cvmx_pko_ptf_iobp_cfg_t ptf_iobp_cfg; + cvmx_pko_pdm_cfg_t pko_pdm_cfg; + cvmx_pko_enable_t pko_enable; + cvmx_pko_dpfi_status_t dpfi_status; + cvmx_pko_status_t pko_status; + cvmx_pko_shaper_cfg_t shaper_cfg; + u64 cycles; + const unsigned int timeout = 100; /* 100 milliseconds */ + + if (node != (aura >> 10)) + cvmx_printf("WARNING: AURA vs PKO node mismatch\n"); + + pko_enable.u64 = csr_rd_node(node, CVMX_PKO_ENABLE); + if (pko_enable.s.enable) { + cvmx_printf("WARNING: %s: PKO already enabled on node %u\n", + __func__, node); + return 0; + } + /* Enable color awareness. */ + shaper_cfg.u64 = csr_rd_node(node, CVMX_PKO_SHAPER_CFG); + shaper_cfg.s.color_aware = 1; + csr_wr_node(node, CVMX_PKO_SHAPER_CFG, shaper_cfg.u64); + + /* Clear FLUSH command to be sure */ + pko_flush.u64 = 0; + pko_flush.s.flush_en = 0; + csr_wr_node(node, CVMX_PKO_DPFI_FLUSH, pko_flush.u64); + + /* set the aura number in pko, use aura node from parameter */ + pko_aura.u64 = 0; + pko_aura.s.node = aura >> 10; + pko_aura.s.laura = aura; + csr_wr_node(node, CVMX_PKO_DPFI_FPA_AURA, pko_aura.u64); + + CVMX_DUMP_REGX(CVMX_PKO_DPFI_FPA_AURA); + + dpfi_enable.u64 = 0; + dpfi_enable.s.enable = 1; + csr_wr_node(node, CVMX_PKO_DPFI_ENA, dpfi_enable.u64); + + /* Prepare timeout */ + cycles = get_timer(0); + + /* Wait until all pointers have been returned */ + do { + pko_status.u64 = csr_rd_node(node, CVMX_PKO_STATUS); + if (get_timer(cycles) > timeout) + break; + } while (!pko_status.s.pko_rdy); + + if (!pko_status.s.pko_rdy) { + dpfi_status.u64 = csr_rd_node(node, CVMX_PKO_DPFI_STATUS); + cvmx_printf("ERROR: %s: PKO DFPI failed, PKO_STATUS=%#llx DPFI_STATUS=%#llx\n", + __func__, (unsigned long long)pko_status.u64, + (unsigned long long)dpfi_status.u64); + return -1; + } + + /* Set max outstanding requests in IOBP for any FIFO.*/ + ptf_iobp_cfg.u64 = csr_rd_node(node, CVMX_PKO_PTF_IOBP_CFG); + if (OCTEON_IS_MODEL(OCTEON_CN78XX)) + ptf_iobp_cfg.s.max_read_size = 0x10; /* Recommended by HRM.*/ + else + /* Reduce the value from recommended 0x10 to avoid + * getting "underflow" condition in the BGX TX FIFO. + */ + ptf_iobp_cfg.s.max_read_size = 3; + csr_wr_node(node, CVMX_PKO_PTF_IOBP_CFG, ptf_iobp_cfg.u64); + + /* Set minimum packet size per Ethernet standard */ + pko_pdm_cfg.u64 = 0; + pko_pdm_cfg.s.pko_pad_minlen = 0x3c; /* 60 bytes before FCS */ + csr_wr_node(node, CVMX_PKO_PDM_CFG, pko_pdm_cfg.u64); + + /* Initialize MACs and FIFOs */ + cvmx_pko_setup_macs(node); + + /* enable PKO, although interfaces and queues are not up yet */ + pko_enable.u64 = 0; + pko_enable.s.enable = 1; + csr_wr_node(node, CVMX_PKO_ENABLE, pko_enable.u64); + + /* PKO_RDY set indicates successful initialization */ + pko_status.u64 = csr_rd_node(node, CVMX_PKO_STATUS); + if (pko_status.s.pko_rdy) + return 0; + + cvmx_printf("ERROR: %s: failed, PKO_STATUS=%#llx\n", __func__, + (unsigned long long)pko_status.u64); + return -1; +} + +/* + * Configure Channel credit level in PKO. + * + * @param node is to specify the node to which this configuration is applied. + * @param level specifies the level at which pko channel queues will be configured, + * @return returns 0 if successful and -1 on failure. + */ +int cvmx_pko3_channel_credit_level(int node, enum cvmx_pko3_level_e level) +{ + union cvmx_pko_channel_level channel_level; + + channel_level.u64 = 0; + + if (level == CVMX_PKO_L2_QUEUES) + channel_level.s.cc_level = 0; + else if (level == CVMX_PKO_L3_QUEUES) + channel_level.s.cc_level = 1; + else + return -1; + + csr_wr_node(node, CVMX_PKO_CHANNEL_LEVEL, channel_level.u64); + + return 0; +} + +/** Open configured descriptor queues before queueing packets into them. + * + * @param node is to specify the node to which this configuration is applied. + * @param dq is the descriptor queue number to be opened. + * @return returns 0 on success or -1 on failure. + */ +int cvmx_pko_dq_open(int node, int dq) +{ + cvmx_pko_query_rtn_t pko_status; + pko_query_dqstatus_t dqstatus; + cvmx_pko3_dq_params_t *p_param; + + if (debug) + debug("%s: DEBUG: dq %u\n", __func__, dq); + + __cvmx_pko3_dq_param_setup(node); + + pko_status = __cvmx_pko3_do_dma(node, dq, NULL, 0, CVMX_PKO_DQ_OPEN); + + dqstatus = pko_status.s.dqstatus; + + if (dqstatus == PKO_DQSTATUS_ALREADY) + return 0; + if (dqstatus != PKO_DQSTATUS_PASS) { + cvmx_printf("%s: ERROR: Failed to open dq :%u: %s\n", __func__, + dq, pko_dqstatus_error(dqstatus)); + return -1; + } + + /* Setup the descriptor queue software parameters */ + p_param = cvmx_pko3_dq_parameters(node, dq); + if (p_param) { + p_param->depth = pko_status.s.depth; + if (p_param->limit == 0) + p_param->limit = 1024; /* last-resort default */ + } + + return 0; +} + +/* + * PKO initialization of MACs and FIFOs + * + * All MACs are configured and assigned a specific FIFO, + * and each FIFO is configured with size for a best utilization + * of available FIFO resources. + * + * @param node is to specify which node's pko block for this setup. + * @return returns 0 if successful and -1 on failure. + * + * Note: This function contains model-specific code. + */ +static int cvmx_pko_setup_macs(int node) +{ + unsigned int interface; + unsigned int port, num_ports; + unsigned int mac_num, fifo, pri, cnt; + cvmx_helper_interface_mode_t mode; + const unsigned int num_interfaces = + cvmx_helper_get_number_of_interfaces(); + u8 fifo_group_cfg[8]; + u8 fifo_group_spd[8]; + unsigned int fifo_count = 0; + unsigned int max_fifos = 0, fifo_groups = 0; + struct { + u8 fifo_cnt; + u8 fifo_id; + u8 pri; + u8 spd; + u8 mac_fifo_cnt; + } cvmx_pko3_mac_table[32]; + + if (OCTEON_IS_MODEL(OCTEON_CN78XX)) { + max_fifos = 28; /* exclusive of NULL FIFO */ + fifo_groups = 8; /* inclusive of NULL PTGF */ + } + if (OCTEON_IS_MODEL(OCTEON_CN73XX) || OCTEON_IS_MODEL(OCTEON_CNF75XX)) { + max_fifos = 16; + fifo_groups = 5; + } + + /* Initialize FIFO allocation table */ + memset(&fifo_group_cfg, 0, sizeof(fifo_group_cfg)); + memset(&fifo_group_spd, 0, sizeof(fifo_group_spd)); + memset(cvmx_pko3_mac_table, 0, sizeof(cvmx_pko3_mac_table)); + + /* Initialize all MACs as disabled */ + for (mac_num = 0; mac_num < __cvmx_pko3_num_macs(); mac_num++) { + cvmx_pko3_mac_table[mac_num].pri = 0; + cvmx_pko3_mac_table[mac_num].fifo_cnt = 0; + cvmx_pko3_mac_table[mac_num].fifo_id = 0x1f; + } + + for (interface = 0; interface < num_interfaces; interface++) { + int xiface = + cvmx_helper_node_interface_to_xiface(node, interface); + /* Interface type for ALL interfaces */ + mode = cvmx_helper_interface_get_mode(xiface); + num_ports = cvmx_helper_interface_enumerate(xiface); + + if (mode == CVMX_HELPER_INTERFACE_MODE_DISABLED) + continue; + /* + * Non-BGX interfaces: + * Each of these interfaces has a single MAC really. + */ + if (mode == CVMX_HELPER_INTERFACE_MODE_ILK || + mode == CVMX_HELPER_INTERFACE_MODE_NPI || + mode == CVMX_HELPER_INTERFACE_MODE_LOOP) + num_ports = 1; + + for (port = 0; port < num_ports; port++) { + int i; + + /* Get the per-port mode for BGX-interfaces */ + if (interface < CVMX_HELPER_MAX_GMX) + mode = cvmx_helper_bgx_get_mode(xiface, port); + /* In MIXED mode, LMACs can run different protocols */ + + /* convert interface/port to mac number */ + i = __cvmx_pko3_get_mac_num(xiface, port); + if (i < 0 || i >= (int)__cvmx_pko3_num_macs()) { + cvmx_printf("%s: ERROR: interface %d:%u port %d has no MAC %d/%d\n", + __func__, node, interface, port, i, + __cvmx_pko3_num_macs()); + continue; + } + + if (mode == CVMX_HELPER_INTERFACE_MODE_RXAUI) { + unsigned int bgx_fifo_size = + __cvmx_helper_bgx_fifo_size(xiface, + port); + + cvmx_pko3_mac_table[i].mac_fifo_cnt = + bgx_fifo_size / + (CVMX_BGX_TX_FIFO_SIZE / 4); + cvmx_pko3_mac_table[i].pri = 2; + cvmx_pko3_mac_table[i].spd = 10; + cvmx_pko3_mac_table[i].fifo_cnt = 2; + } else if (mode == CVMX_HELPER_INTERFACE_MODE_XLAUI) { + unsigned int bgx_fifo_size = + __cvmx_helper_bgx_fifo_size(xiface, + port); + + cvmx_pko3_mac_table[i].mac_fifo_cnt = + bgx_fifo_size / + (CVMX_BGX_TX_FIFO_SIZE / 4); + cvmx_pko3_mac_table[i].pri = 4; + cvmx_pko3_mac_table[i].spd = 40; + cvmx_pko3_mac_table[i].fifo_cnt = 4; + } else if (mode == CVMX_HELPER_INTERFACE_MODE_XAUI) { + unsigned int bgx_fifo_size = + __cvmx_helper_bgx_fifo_size(xiface, + port); + + cvmx_pko3_mac_table[i].mac_fifo_cnt = + bgx_fifo_size / + (CVMX_BGX_TX_FIFO_SIZE / 4); + cvmx_pko3_mac_table[i].pri = 3; + cvmx_pko3_mac_table[i].fifo_cnt = 4; + /* DXAUI at 20G, or XAU at 10G */ + cvmx_pko3_mac_table[i].spd = 20; + } else if (mode == CVMX_HELPER_INTERFACE_MODE_XFI) { + unsigned int bgx_fifo_size = + __cvmx_helper_bgx_fifo_size(xiface, + port); + + cvmx_pko3_mac_table[i].mac_fifo_cnt = + bgx_fifo_size / + (CVMX_BGX_TX_FIFO_SIZE / 4); + cvmx_pko3_mac_table[i].pri = 3; + cvmx_pko3_mac_table[i].fifo_cnt = 4; + cvmx_pko3_mac_table[i].spd = 10; + } else if (mode == CVMX_HELPER_INTERFACE_MODE_LOOP) { + cvmx_pko3_mac_table[i].fifo_cnt = 1; + cvmx_pko3_mac_table[i].pri = 1; + cvmx_pko3_mac_table[i].spd = 1; + cvmx_pko3_mac_table[i].mac_fifo_cnt = 1; + } else if (mode == CVMX_HELPER_INTERFACE_MODE_ILK || + mode == CVMX_HELPER_INTERFACE_MODE_SRIO) { + cvmx_pko3_mac_table[i].fifo_cnt = 4; + cvmx_pko3_mac_table[i].pri = 3; + /* ILK/SRIO: speed depends on lane count */ + cvmx_pko3_mac_table[i].spd = 40; + cvmx_pko3_mac_table[i].mac_fifo_cnt = 4; + } else if (mode == CVMX_HELPER_INTERFACE_MODE_NPI) { + cvmx_pko3_mac_table[i].fifo_cnt = 4; + cvmx_pko3_mac_table[i].pri = 2; + /* Actual speed depends on PCIe lanes/mode */ + cvmx_pko3_mac_table[i].spd = 50; + /* SLI Tx FIFO size to be revisitted */ + cvmx_pko3_mac_table[i].mac_fifo_cnt = 1; + } else { + /* Other BGX interface modes: SGMII/RGMII */ + unsigned int bgx_fifo_size = + __cvmx_helper_bgx_fifo_size(xiface, + port); + + cvmx_pko3_mac_table[i].mac_fifo_cnt = + bgx_fifo_size / + (CVMX_BGX_TX_FIFO_SIZE / 4); + cvmx_pko3_mac_table[i].fifo_cnt = 1; + cvmx_pko3_mac_table[i].pri = 1; + cvmx_pko3_mac_table[i].spd = 1; + } + + if (debug) + debug("%s: intf %d:%u port %u %s mac %02u cnt %u macfifo %uk spd %u\n", + __func__, node, interface, port, + cvmx_helper_interface_mode_to_string(mode), + i, cvmx_pko3_mac_table[i].fifo_cnt, + cvmx_pko3_mac_table[i].mac_fifo_cnt * 8, + cvmx_pko3_mac_table[i].spd); + + } /* for port */ + } /* for interface */ + + /* Count the number of requested FIFOs */ + for (fifo_count = mac_num = 0; mac_num < __cvmx_pko3_num_macs(); + mac_num++) + fifo_count += cvmx_pko3_mac_table[mac_num].fifo_cnt; + + if (debug) + debug("%s: initially requested FIFO count %u\n", __func__, + fifo_count); + + /* Heuristically trim FIFO count to fit in available number */ + pri = 1; + cnt = 4; + while (fifo_count > max_fifos) { + for (mac_num = 0; mac_num < __cvmx_pko3_num_macs(); mac_num++) { + if (cvmx_pko3_mac_table[mac_num].fifo_cnt == cnt && + cvmx_pko3_mac_table[mac_num].pri <= pri) { + cvmx_pko3_mac_table[mac_num].fifo_cnt >>= 1; + fifo_count -= + cvmx_pko3_mac_table[mac_num].fifo_cnt; + } + if (fifo_count <= max_fifos) + break; + } + if (pri >= 4) { + pri = 1; + cnt >>= 1; + } else { + pri++; + } + if (cnt == 0) + break; + } + + if (debug) + debug("%s: adjusted FIFO count %u\n", __func__, fifo_count); + + /* Special case for NULL Virtual FIFO */ + fifo_group_cfg[fifo_groups - 1] = 0; + /* there is no MAC connected to NULL FIFO */ + + /* Configure MAC units, and attach a FIFO to each */ + for (fifo = 0, cnt = 4; cnt > 0; cnt >>= 1) { + unsigned int g; + + for (mac_num = 0; mac_num < __cvmx_pko3_num_macs(); mac_num++) { + if (cvmx_pko3_mac_table[mac_num].fifo_cnt < cnt || + cvmx_pko3_mac_table[mac_num].fifo_id != 0x1f) + continue; + + /* Attach FIFO to MAC */ + cvmx_pko3_mac_table[mac_num].fifo_id = fifo; + g = fifo >> 2; + /* Sum speed for FIFO group */ + fifo_group_spd[g] += cvmx_pko3_mac_table[mac_num].spd; + + if (cnt == 4) + fifo_group_cfg[g] = 4; /* 10k,0,0,0 */ + else if (cnt == 2 && (fifo & 0x3) == 0) + fifo_group_cfg[g] = 3; /* 5k,0,5k,0 */ + else if (cnt == 2 && fifo_group_cfg[g] == 3) + /* no change */; + else if (cnt == 1 && (fifo & 0x2) && + fifo_group_cfg[g] == 3) + fifo_group_cfg[g] = 1; /* 5k,0,2.5k 2.5k*/ + else if (cnt == 1 && (fifo & 0x3) == 0x3) + /* no change */; + else if (cnt == 1) + fifo_group_cfg[g] = 0; /* 2.5k x 4 */ + else + cvmx_printf("ERROR: %s: internal error\n", + __func__); + + fifo += cnt; + } + } + + /* Check if there was no error in FIFO allocation */ + if (fifo > max_fifos) { + cvmx_printf("ERROR: %s: Internal error FIFO %u\n", __func__, + fifo); + return -1; + } + + if (debug) + debug("%s: used %u of FIFOs\n", __func__, fifo); + + /* Now configure all FIFO groups */ + for (fifo = 0; fifo < fifo_groups; fifo++) { + cvmx_pko_ptgfx_cfg_t pko_ptgfx_cfg; + + pko_ptgfx_cfg.u64 = csr_rd_node(node, CVMX_PKO_PTGFX_CFG(fifo)); + if (pko_ptgfx_cfg.s.size != fifo_group_cfg[fifo]) + pko_ptgfx_cfg.s.reset = 1; + pko_ptgfx_cfg.s.size = fifo_group_cfg[fifo]; + if (fifo_group_spd[fifo] >= 40) + if (pko_ptgfx_cfg.s.size >= 3) + pko_ptgfx_cfg.s.rate = 3; /* 50 Gbps */ + else + pko_ptgfx_cfg.s.rate = 2; /* 25 Gbps */ + else if (fifo_group_spd[fifo] >= 20) + pko_ptgfx_cfg.s.rate = 2; /* 25 Gbps */ + else if (fifo_group_spd[fifo] >= 10) + pko_ptgfx_cfg.s.rate = 1; /* 12.5 Gbps */ + else + pko_ptgfx_cfg.s.rate = 0; /* 6.25 Gbps */ + + if (debug) + debug("%s: FIFO %#x-%#x size=%u speed=%d rate=%d\n", + __func__, fifo * 4, fifo * 4 + 3, + pko_ptgfx_cfg.s.size, fifo_group_spd[fifo], + pko_ptgfx_cfg.s.rate); + + csr_wr_node(node, CVMX_PKO_PTGFX_CFG(fifo), pko_ptgfx_cfg.u64); + pko_ptgfx_cfg.s.reset = 0; + csr_wr_node(node, CVMX_PKO_PTGFX_CFG(fifo), pko_ptgfx_cfg.u64); + } + + /* Configure all MACs assigned FIFO number */ + for (mac_num = 0; mac_num < __cvmx_pko3_num_macs(); mac_num++) { + cvmx_pko_macx_cfg_t pko_mac_cfg; + + if (debug) + debug("%s: mac#%02u: fifo=%#x cnt=%u speed=%d\n", + __func__, mac_num, + cvmx_pko3_mac_table[mac_num].fifo_id, + cvmx_pko3_mac_table[mac_num].fifo_cnt, + cvmx_pko3_mac_table[mac_num].spd); + + pko_mac_cfg.u64 = csr_rd_node(node, CVMX_PKO_MACX_CFG(mac_num)); + pko_mac_cfg.s.fifo_num = cvmx_pko3_mac_table[mac_num].fifo_id; + csr_wr_node(node, CVMX_PKO_MACX_CFG(mac_num), pko_mac_cfg.u64); + } + + /* Setup PKO MCI0/MCI1/SKID credits */ + for (mac_num = 0; mac_num < __cvmx_pko3_num_macs(); mac_num++) { + cvmx_pko_mci0_max_credx_t pko_mci0_max_cred; + cvmx_pko_mci1_max_credx_t pko_mci1_max_cred; + cvmx_pko_macx_cfg_t pko_mac_cfg; + unsigned int fifo_credit, mac_credit, skid_credit; + unsigned int pko_fifo_cnt, fifo_size; + unsigned int mac_fifo_cnt; + unsigned int tmp; + int saved_fifo_num; + + pko_fifo_cnt = cvmx_pko3_mac_table[mac_num].fifo_cnt; + mac_fifo_cnt = cvmx_pko3_mac_table[mac_num].mac_fifo_cnt; + + /* Skip unused MACs */ + if (pko_fifo_cnt == 0) + continue; + + /* Check for sanity */ + if (pko_fifo_cnt > 4) + pko_fifo_cnt = 1; + + fifo_size = (2 * 1024) + (1024 / 2); /* 2.5KiB */ + fifo_credit = pko_fifo_cnt * fifo_size; + + if (mac_num == 0) { + /* loopback */ + mac_credit = 4096; /* From HRM Sec 13.0 */ + skid_credit = 0; + } else if (mac_num == 1) { + /* DPI */ + mac_credit = 2 * 1024; + skid_credit = 0; + } else if (octeon_has_feature(OCTEON_FEATURE_ILK) && + (mac_num & 0xfe) == 2) { + /* ILK0, ILK1: MAC 2,3 */ + mac_credit = 4 * 1024; /* 4KB fifo */ + skid_credit = 0; + } else if (octeon_has_feature(OCTEON_FEATURE_SRIO) && + (mac_num >= 6) && (mac_num <= 9)) { + /* SRIO0, SRIO1: MAC 6..9 */ + mac_credit = 1024 / 2; + skid_credit = 0; + } else { + /* BGX */ + mac_credit = mac_fifo_cnt * 8 * 1024; + skid_credit = mac_fifo_cnt * 256; + } + + if (debug) + debug("%s: mac %u pko_fifo_credit=%u mac_credit=%u\n", + __func__, mac_num, fifo_credit, mac_credit); + + tmp = (fifo_credit + mac_credit) / 16; + pko_mci0_max_cred.u64 = 0; + pko_mci0_max_cred.s.max_cred_lim = tmp; + + /* Check for overflow */ + if (pko_mci0_max_cred.s.max_cred_lim != tmp) { + cvmx_printf("WARNING: %s: MCI0 credit overflow\n", + __func__); + pko_mci0_max_cred.s.max_cred_lim = 0xfff; + } + + /* Pass 2 PKO hardware does not use the MCI0 credits */ + if (OCTEON_IS_MODEL(OCTEON_CN78XX_PASS1_X)) + csr_wr_node(node, CVMX_PKO_MCI0_MAX_CREDX(mac_num), + pko_mci0_max_cred.u64); + + /* The original CSR formula is the correct one after all */ + tmp = (mac_credit) / 16; + pko_mci1_max_cred.u64 = 0; + pko_mci1_max_cred.s.max_cred_lim = tmp; + + /* Check for overflow */ + if (pko_mci1_max_cred.s.max_cred_lim != tmp) { + cvmx_printf("WARNING: %s: MCI1 credit overflow\n", + __func__); + pko_mci1_max_cred.s.max_cred_lim = 0xfff; + } + + csr_wr_node(node, CVMX_PKO_MCI1_MAX_CREDX(mac_num), + pko_mci1_max_cred.u64); + + tmp = (skid_credit / 256) >> 1; /* valid 0,1,2 */ + pko_mac_cfg.u64 = csr_rd_node(node, CVMX_PKO_MACX_CFG(mac_num)); + + /* The PKO_MACX_CFG bits cannot be changed unless FIFO_MUM=0x1f (unused fifo) */ + saved_fifo_num = pko_mac_cfg.s.fifo_num; + pko_mac_cfg.s.fifo_num = 0x1f; + pko_mac_cfg.s.skid_max_cnt = tmp; + csr_wr_node(node, CVMX_PKO_MACX_CFG(mac_num), pko_mac_cfg.u64); + + pko_mac_cfg.u64 = csr_rd_node(node, CVMX_PKO_MACX_CFG(mac_num)); + pko_mac_cfg.s.fifo_num = saved_fifo_num; + csr_wr_node(node, CVMX_PKO_MACX_CFG(mac_num), pko_mac_cfg.u64); + + if (debug) { + pko_mci0_max_cred.u64 = + csr_rd_node(node, CVMX_PKO_MCI0_MAX_CREDX(mac_num)); + pko_mci1_max_cred.u64 = + csr_rd_node(node, CVMX_PKO_MCI1_MAX_CREDX(mac_num)); + pko_mac_cfg.u64 = + csr_rd_node(node, CVMX_PKO_MACX_CFG(mac_num)); + debug("%s: mac %u PKO_MCI0_MAX_CREDX=%u PKO_MCI1_MAX_CREDX=%u PKO_MACX_CFG[SKID_MAX_CNT]=%u\n", + __func__, mac_num, + pko_mci0_max_cred.s.max_cred_lim, + pko_mci1_max_cred.s.max_cred_lim, + pko_mac_cfg.s.skid_max_cnt); + } + } /* for mac_num */ + + return 0; +} + +/** Set MAC options + * + * The options supported are the parameters below: + * + * @param xiface The physical interface number + * @param index The physical sub-interface port + * @param fcs_enable Enable FCS generation + * @param pad_enable Enable padding to minimum packet size + * @param fcs_sop_off Number of bytes at start of packet to exclude from FCS + * + * The typical use for `fcs_sop_off` is when the interface is configured + * to use a header such as HighGig to precede every Ethernet packet, + * such a header usually does not partake in the CRC32 computation stream, + * and its size must be set with this parameter. + * + * @return Returns 0 on success, -1 if interface/port is invalid. + */ +int cvmx_pko3_interface_options(int xiface, int index, bool fcs_enable, + bool pad_enable, unsigned int fcs_sop_off) +{ + int mac_num; + cvmx_pko_macx_cfg_t pko_mac_cfg; + unsigned int fifo_num; + struct cvmx_xiface xi = cvmx_helper_xiface_to_node_interface(xiface); + + if (debug) + debug("%s: intf %u:%u/%u fcs=%d pad=%d\n", __func__, xi.node, + xi.interface, index, fcs_enable, pad_enable); + + mac_num = __cvmx_pko3_get_mac_num(xiface, index); + if (mac_num < 0) { + cvmx_printf("ERROR: %s: invalid interface %u:%u/%u\n", __func__, + xi.node, xi.interface, index); + return -1; + } + + pko_mac_cfg.u64 = csr_rd_node(xi.node, CVMX_PKO_MACX_CFG(mac_num)); + + /* If MAC is not assigned, return an error */ + if (pko_mac_cfg.s.fifo_num == 0x1f) { + cvmx_printf("ERROR: %s: unused interface %u:%u/%u\n", __func__, + xi.node, xi.interface, index); + return -1; + } + + if (pko_mac_cfg.s.min_pad_ena == pad_enable && + pko_mac_cfg.s.fcs_ena == fcs_enable) { + if (debug) + debug("%s: mac %#x unchanged\n", __func__, mac_num); + return 0; + } + + /* WORKAROUND: Pass1 won't allow change any bits unless FIFO_NUM=0x1f */ + fifo_num = pko_mac_cfg.s.fifo_num; + pko_mac_cfg.s.fifo_num = 0x1f; + + pko_mac_cfg.s.min_pad_ena = pad_enable; + pko_mac_cfg.s.fcs_ena = fcs_enable; + pko_mac_cfg.s.fcs_sop_off = fcs_sop_off; + + csr_wr_node(xi.node, CVMX_PKO_MACX_CFG(mac_num), pko_mac_cfg.u64); + + pko_mac_cfg.s.fifo_num = fifo_num; + csr_wr_node(xi.node, CVMX_PKO_MACX_CFG(mac_num), pko_mac_cfg.u64); + + if (debug) + debug("%s: PKO_MAC[%u]CFG=%#llx\n", __func__, mac_num, + (unsigned long long)csr_rd_node(xi.node, CVMX_PKO_MACX_CFG(mac_num))); + + return 0; +} + +/** Set Descriptor Queue options + * + * The `min_pad` parameter must be in agreement with the interface-level + * padding option for all descriptor queues assigned to that particular + * interface/port. + * + * @param node on which to operate + * @param dq descriptor queue to set + * @param min_pad minimum padding to set for dq + */ +void cvmx_pko3_dq_options(unsigned int node, unsigned int dq, bool min_pad) +{ + cvmx_pko_pdm_dqx_minpad_t reg; + + dq &= (1 << 10) - 1; + reg.u64 = csr_rd_node(node, CVMX_PKO_PDM_DQX_MINPAD(dq)); + reg.s.minpad = min_pad; + csr_wr_node(node, CVMX_PKO_PDM_DQX_MINPAD(dq), reg.u64); +}