11590Srgrimes// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 21590Srgrimes/* Copyright (C) 2018 Netronome Systems, Inc. */ 31590Srgrimes 41590Srgrimes#include <linux/bitfield.h> 51590Srgrimes#include <linux/device.h> 61590Srgrimes#include <linux/kernel.h> 71590Srgrimes#include <linux/types.h> 81590Srgrimes 91590Srgrimes#include "nfp_net_ctrl.h" 101590Srgrimes#include "nfp_net.h" 111590Srgrimes 121590Srgrimesstatic void nfp_net_tlv_caps_reset(struct nfp_net_tlv_caps *caps) 131590Srgrimes{ 141590Srgrimes memset(caps, 0, sizeof(*caps)); 151590Srgrimes caps->me_freq_mhz = 1200; 161590Srgrimes caps->mbox_off = NFP_NET_CFG_MBOX_BASE; 171590Srgrimes caps->mbox_len = NFP_NET_CFG_MBOX_VAL_MAX_SZ; 181590Srgrimes} 191590Srgrimes 201590Srgrimesstatic bool 211590Srgrimesnfp_net_tls_parse_crypto_ops(struct device *dev, struct nfp_net_tlv_caps *caps, 221590Srgrimes u8 __iomem *ctrl_mem, u8 __iomem *data, 231590Srgrimes unsigned int length, unsigned int offset, 241590Srgrimes bool rx_stream_scan) 251590Srgrimes{ 261590Srgrimes /* Ignore the legacy TLV if new one was already parsed */ 271590Srgrimes if (caps->tls_resync_ss && !rx_stream_scan) 281590Srgrimes return true; 291590Srgrimes 301590Srgrimes if (length < 32) { 311590Srgrimes dev_err(dev, 321590Srgrimes "CRYPTO OPS TLV should be at least 32B, is %dB offset:%u\n", 331590Srgrimes length, offset); 341590Srgrimes return false; 351590Srgrimes } 361590Srgrimes 371590Srgrimes caps->crypto_ops = readl(data); 381590Srgrimes caps->crypto_enable_off = data - ctrl_mem + 16; 3928066Scharnier caps->tls_resync_ss = rx_stream_scan; 401590Srgrimes 4128066Scharnier return true; 4228066Scharnier} 4350477Speter 441590Srgrimesint nfp_net_tlv_caps_parse(struct device *dev, u8 __iomem *ctrl_mem, 451590Srgrimes struct nfp_net_tlv_caps *caps) 461590Srgrimes{ 471590Srgrimes u8 __iomem *data = ctrl_mem + NFP_NET_CFG_TLV_BASE; 4828066Scharnier u8 __iomem *end = ctrl_mem + NFP_NET_CFG_BAR_SZ; 491590Srgrimes u32 hdr; 501590Srgrimes 511590Srgrimes nfp_net_tlv_caps_reset(caps); 521590Srgrimes 531590Srgrimes hdr = readl(data); 541590Srgrimes if (!hdr) 551590Srgrimes return 0; 561590Srgrimes 571590Srgrimes while (true) { 581590Srgrimes unsigned int length, offset; 591590Srgrimes u32 hdr = readl(data); 601590Srgrimes 611590Srgrimes length = FIELD_GET(NFP_NET_CFG_TLV_HEADER_LENGTH, hdr); 621590Srgrimes offset = data - ctrl_mem; 631590Srgrimes 641590Srgrimes /* Advance past the header */ 651590Srgrimes data += 4; 661590Srgrimes 6728066Scharnier if (length % NFP_NET_CFG_TLV_LENGTH_INC) { 681590Srgrimes dev_err(dev, "TLV size not multiple of %u offset:%u len:%u\n", 691590Srgrimes NFP_NET_CFG_TLV_LENGTH_INC, offset, length); 701590Srgrimes return -EINVAL; 711590Srgrimes } 721590Srgrimes if (data + length > end) { 731590Srgrimes dev_err(dev, "oversized TLV offset:%u len:%u\n", 741590Srgrimes offset, length); 751590Srgrimes return -EINVAL; 761590Srgrimes } 771590Srgrimes 781590Srgrimes switch (FIELD_GET(NFP_NET_CFG_TLV_HEADER_TYPE, hdr)) { 791590Srgrimes case NFP_NET_CFG_TLV_TYPE_UNKNOWN: 801590Srgrimes dev_err(dev, "NULL TLV at offset:%u\n", offset); 811590Srgrimes return -EINVAL; 821590Srgrimes case NFP_NET_CFG_TLV_TYPE_RESERVED: 8328066Scharnier break; 841590Srgrimes case NFP_NET_CFG_TLV_TYPE_END: 851590Srgrimes if (!length) 861590Srgrimes return 0; 871590Srgrimes 881590Srgrimes dev_err(dev, "END TLV should be empty, has offset:%u len:%d\n", 891590Srgrimes offset, length); 901590Srgrimes return -EINVAL; 911590Srgrimes case NFP_NET_CFG_TLV_TYPE_ME_FREQ: 921590Srgrimes if (length != 4) { 931590Srgrimes dev_err(dev, 941590Srgrimes "ME FREQ TLV should be 4B, is %dB offset:%u\n", 951590Srgrimes length, offset); 961590Srgrimes return -EINVAL; 971590Srgrimes } 981590Srgrimes 991590Srgrimes caps->me_freq_mhz = readl(data); 1001590Srgrimes break; 1011590Srgrimes case NFP_NET_CFG_TLV_TYPE_MBOX: 1021590Srgrimes if (!length) { 1031590Srgrimes caps->mbox_off = 0; 1041590Srgrimes caps->mbox_len = 0; 1051590Srgrimes } else { 1061590Srgrimes caps->mbox_off = data - ctrl_mem; 107 caps->mbox_len = length; 108 } 109 break; 110 case NFP_NET_CFG_TLV_TYPE_EXPERIMENTAL0: 111 case NFP_NET_CFG_TLV_TYPE_EXPERIMENTAL1: 112 dev_warn(dev, 113 "experimental TLV type:%u offset:%u len:%u\n", 114 FIELD_GET(NFP_NET_CFG_TLV_HEADER_TYPE, hdr), 115 offset, length); 116 break; 117 case NFP_NET_CFG_TLV_TYPE_REPR_CAP: 118 if (length < 4) { 119 dev_err(dev, "REPR CAP TLV short %dB < 4B offset:%u\n", 120 length, offset); 121 return -EINVAL; 122 } 123 124 caps->repr_cap = readl(data); 125 break; 126 case NFP_NET_CFG_TLV_TYPE_MBOX_CMSG_TYPES: 127 if (length >= 4) 128 caps->mbox_cmsg_types = readl(data); 129 break; 130 case NFP_NET_CFG_TLV_TYPE_CRYPTO_OPS: 131 if (!nfp_net_tls_parse_crypto_ops(dev, caps, ctrl_mem, 132 data, length, offset, 133 false)) 134 return -EINVAL; 135 break; 136 case NFP_NET_CFG_TLV_TYPE_VNIC_STATS: 137 if ((data - ctrl_mem) % 8) { 138 dev_warn(dev, "VNIC STATS TLV misaligned, ignoring offset:%u len:%u\n", 139 offset, length); 140 break; 141 } 142 caps->vnic_stats_off = data - ctrl_mem; 143 caps->vnic_stats_cnt = length / 10; 144 break; 145 case NFP_NET_CFG_TLV_TYPE_CRYPTO_OPS_RX_SCAN: 146 if (!nfp_net_tls_parse_crypto_ops(dev, caps, ctrl_mem, 147 data, length, offset, 148 true)) 149 return -EINVAL; 150 break; 151 default: 152 if (!FIELD_GET(NFP_NET_CFG_TLV_HEADER_REQUIRED, hdr)) 153 break; 154 155 dev_err(dev, "unknown TLV type:%u offset:%u len:%u\n", 156 FIELD_GET(NFP_NET_CFG_TLV_HEADER_TYPE, hdr), 157 offset, length); 158 return -EINVAL; 159 } 160 161 data += length; 162 if (data + 4 > end) { 163 dev_err(dev, "reached end of BAR without END TLV\n"); 164 return -EINVAL; 165 } 166 } 167 168 /* Not reached */ 169 return -EINVAL; 170} 171