Jeremy Kerr | 3d36ee2 | 2019-05-30 11:15:37 +0800 | [diff] [blame] | 1 | /* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later */ |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 2 | |
Andrew Jeffery | 3286f17 | 2020-03-17 23:04:13 +1030 | [diff] [blame] | 3 | #if HAVE_CONFIG_H |
| 4 | #include "config.h" |
| 5 | #endif |
| 6 | |
| 7 | #if HAVE_ENDIAN_H |
Jeremy Kerr | 92a10a6 | 2019-08-28 16:55:54 +0530 | [diff] [blame] | 8 | #include <endian.h> |
Andrew Jeffery | 3286f17 | 2020-03-17 23:04:13 +1030 | [diff] [blame] | 9 | #endif |
| 10 | |
| 11 | #include <assert.h> |
Andrew Jeffery | 59c6a5c | 2020-01-17 15:52:51 +1030 | [diff] [blame] | 12 | #include <err.h> |
Andrew Jeffery | 7cd72f1 | 2020-05-12 20:27:59 +0930 | [diff] [blame^] | 13 | #include <errno.h> |
Andrew Jeffery | edfe383 | 2020-02-06 11:52:11 +1030 | [diff] [blame] | 14 | #include <inttypes.h> |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 15 | #include <stdbool.h> |
| 16 | #include <stdlib.h> |
| 17 | #include <string.h> |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 18 | |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 19 | #define pr_fmt(x) "astlpc: " x |
| 20 | |
| 21 | #include "libmctp.h" |
| 22 | #include "libmctp-alloc.h" |
| 23 | #include "libmctp-log.h" |
| 24 | #include "libmctp-astlpc.h" |
Przemyslaw Czarnowski | ff25d7e | 2020-03-26 11:39:37 +0100 | [diff] [blame] | 25 | #include "container_of.h" |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 26 | |
Jeremy Kerr | b214c64 | 2019-11-27 11:34:00 +0800 | [diff] [blame] | 27 | #ifdef MCTP_HAVE_FILEIO |
Jeremy Kerr | 92a10a6 | 2019-08-28 16:55:54 +0530 | [diff] [blame] | 28 | |
Jeremy Kerr | c6f676d | 2019-12-19 09:24:06 +0800 | [diff] [blame] | 29 | #include <unistd.h> |
Jeremy Kerr | 92a10a6 | 2019-08-28 16:55:54 +0530 | [diff] [blame] | 30 | #include <fcntl.h> |
| 31 | #include <sys/ioctl.h> |
| 32 | #include <sys/mman.h> |
| 33 | #include <linux/aspeed-lpc-ctrl.h> |
| 34 | |
| 35 | /* kernel interface */ |
| 36 | static const char *kcs_path = "/dev/mctp0"; |
| 37 | static const char *lpc_path = "/dev/aspeed-lpc-ctrl"; |
| 38 | |
| 39 | #endif |
| 40 | |
Andrew Jeffery | 7cd72f1 | 2020-05-12 20:27:59 +0930 | [diff] [blame^] | 41 | struct mctp_astlpc_buffer { |
| 42 | uint32_t offset; |
| 43 | uint32_t size; |
| 44 | }; |
| 45 | |
| 46 | struct mctp_astlpc_layout { |
| 47 | struct mctp_astlpc_buffer rx; |
| 48 | struct mctp_astlpc_buffer tx; |
| 49 | }; |
| 50 | |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 51 | struct mctp_binding_astlpc { |
| 52 | struct mctp_binding binding; |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 53 | |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 54 | union { |
| 55 | void *lpc_map; |
| 56 | struct mctp_lpcmap_hdr *lpc_hdr; |
| 57 | }; |
Andrew Jeffery | 7cd72f1 | 2020-05-12 20:27:59 +0930 | [diff] [blame^] | 58 | struct mctp_astlpc_layout layout; |
| 59 | |
| 60 | uint8_t mode; |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 61 | |
| 62 | /* direct ops data */ |
| 63 | struct mctp_binding_astlpc_ops ops; |
| 64 | void *ops_data; |
| 65 | struct mctp_lpcmap_hdr *priv_hdr; |
| 66 | |
| 67 | /* fileio ops data */ |
| 68 | void *lpc_map_base; |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 69 | int kcs_fd; |
| 70 | uint8_t kcs_status; |
| 71 | |
| 72 | bool running; |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 73 | }; |
| 74 | |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 75 | #define binding_to_astlpc(b) \ |
| 76 | container_of(b, struct mctp_binding_astlpc, binding) |
| 77 | |
Andrew Jeffery | 7cd72f1 | 2020-05-12 20:27:59 +0930 | [diff] [blame^] | 78 | /* clang-format off */ |
| 79 | #define ASTLPC_MCTP_MAGIC 0x4d435450 |
| 80 | #define ASTLPC_VER_MIN 1 |
| 81 | #define ASTLPC_VER_CUR 1 |
| 82 | |
| 83 | #define ASTLPC_BODY_SIZE(sz) ((sz) - 4) |
| 84 | /* clang-format on */ |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 85 | |
| 86 | struct mctp_lpcmap_hdr { |
| 87 | uint32_t magic; |
| 88 | |
| 89 | uint16_t bmc_ver_min; |
| 90 | uint16_t bmc_ver_cur; |
| 91 | uint16_t host_ver_min; |
| 92 | uint16_t host_ver_cur; |
| 93 | uint16_t negotiated_ver; |
| 94 | uint16_t pad0; |
| 95 | |
| 96 | uint32_t rx_offset; |
| 97 | uint32_t rx_size; |
| 98 | uint32_t tx_offset; |
| 99 | uint32_t tx_size; |
| 100 | } __attribute__((packed)); |
| 101 | |
| 102 | /* layout of TX/RX areas */ |
| 103 | static const uint32_t rx_offset = 0x100; |
| 104 | static const uint32_t rx_size = 0x100; |
| 105 | static const uint32_t tx_offset = 0x200; |
| 106 | static const uint32_t tx_size = 0x100; |
| 107 | |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 108 | #define LPC_WIN_SIZE (1 * 1024 * 1024) |
| 109 | |
| 110 | enum { |
| 111 | KCS_REG_DATA = 0, |
| 112 | KCS_REG_STATUS = 1, |
| 113 | }; |
| 114 | |
| 115 | #define KCS_STATUS_BMC_READY 0x80 |
| 116 | #define KCS_STATUS_CHANNEL_ACTIVE 0x40 |
| 117 | #define KCS_STATUS_IBF 0x02 |
| 118 | #define KCS_STATUS_OBF 0x01 |
| 119 | |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 120 | static bool lpc_direct(struct mctp_binding_astlpc *astlpc) |
| 121 | { |
| 122 | return astlpc->lpc_map != NULL; |
| 123 | } |
| 124 | |
Andrew Jeffery | 7cd72f1 | 2020-05-12 20:27:59 +0930 | [diff] [blame^] | 125 | static int mctp_astlpc_init_bmc(struct mctp_binding_astlpc *astlpc) |
| 126 | { |
| 127 | struct mctp_lpcmap_hdr *hdr; |
| 128 | uint8_t status; |
| 129 | int rc; |
| 130 | |
| 131 | /* Flip the buffers as the names are defined in terms of the host */ |
| 132 | astlpc->layout.rx.offset = tx_offset; |
| 133 | astlpc->layout.rx.size = tx_size; |
| 134 | astlpc->layout.tx.offset = rx_offset; |
| 135 | astlpc->layout.tx.size = rx_size; |
| 136 | |
| 137 | if (lpc_direct(astlpc)) |
| 138 | hdr = astlpc->lpc_hdr; |
| 139 | else |
| 140 | hdr = astlpc->priv_hdr; |
| 141 | |
| 142 | hdr->magic = htobe32(ASTLPC_MCTP_MAGIC); |
| 143 | hdr->bmc_ver_min = htobe16(ASTLPC_VER_MIN); |
| 144 | hdr->bmc_ver_cur = htobe16(ASTLPC_VER_CUR); |
| 145 | |
| 146 | /* Flip the buffers back as we're now describing the host's |
| 147 | * configuration to the host */ |
| 148 | hdr->rx_offset = htobe32(astlpc->layout.tx.offset); |
| 149 | hdr->rx_size = htobe32(astlpc->layout.tx.size); |
| 150 | hdr->tx_offset = htobe32(astlpc->layout.rx.offset); |
| 151 | hdr->tx_size = htobe32(astlpc->layout.rx.size); |
| 152 | |
| 153 | if (!lpc_direct(astlpc)) |
| 154 | astlpc->ops.lpc_write(astlpc->ops_data, hdr, 0, sizeof(*hdr)); |
| 155 | |
| 156 | /* set status indicating that the BMC is now active */ |
| 157 | status = KCS_STATUS_BMC_READY | KCS_STATUS_OBF; |
| 158 | /* XXX: Should we be calling mctp_astlpc_kcs_set_status() instead? */ |
| 159 | rc = astlpc->ops.kcs_write(astlpc->ops_data, MCTP_ASTLPC_KCS_REG_STATUS, |
| 160 | status); |
| 161 | if (rc) { |
| 162 | mctp_prwarn("KCS write failed"); |
| 163 | } |
| 164 | |
| 165 | return rc; |
| 166 | } |
| 167 | |
| 168 | static int mctp_binding_astlpc_start_bmc(struct mctp_binding *b) |
| 169 | { |
| 170 | struct mctp_binding_astlpc *astlpc = |
| 171 | container_of(b, struct mctp_binding_astlpc, binding); |
| 172 | |
| 173 | return mctp_astlpc_init_bmc(astlpc); |
| 174 | } |
| 175 | |
| 176 | static int mctp_astlpc_init_host(struct mctp_binding_astlpc *astlpc) |
| 177 | { |
| 178 | struct mctp_lpcmap_hdr *hdr; |
| 179 | uint8_t status; |
| 180 | int rc; |
| 181 | |
| 182 | rc = astlpc->ops.kcs_read(astlpc->ops_data, MCTP_ASTLPC_KCS_REG_STATUS, |
| 183 | &status); |
| 184 | if (rc) { |
| 185 | mctp_prwarn("KCS status read failed"); |
| 186 | return rc; |
| 187 | } |
| 188 | |
| 189 | astlpc->kcs_status = status; |
| 190 | |
| 191 | if (!(status & KCS_STATUS_BMC_READY)) |
| 192 | return -EHOSTDOWN; |
| 193 | |
| 194 | if (lpc_direct(astlpc)) { |
| 195 | hdr = astlpc->lpc_hdr; |
| 196 | } else { |
| 197 | hdr = astlpc->priv_hdr; |
| 198 | astlpc->ops.lpc_read(astlpc->ops_data, hdr, 0, sizeof(*hdr)); |
| 199 | } |
| 200 | |
| 201 | astlpc->layout.rx.offset = be32toh(hdr->rx_offset); |
| 202 | astlpc->layout.rx.size = be32toh(hdr->rx_size); |
| 203 | astlpc->layout.tx.offset = be32toh(hdr->tx_offset); |
| 204 | astlpc->layout.tx.size = be32toh(hdr->tx_size); |
| 205 | |
| 206 | hdr->host_ver_min = htobe16(ASTLPC_VER_MIN); |
| 207 | if (!lpc_direct(astlpc)) |
| 208 | astlpc->ops.lpc_write(astlpc->ops_data, &hdr->host_ver_min, |
| 209 | offsetof(struct mctp_lpcmap_hdr, |
| 210 | host_ver_min), |
| 211 | sizeof(hdr->host_ver_min)); |
| 212 | |
| 213 | hdr->host_ver_cur = htobe16(ASTLPC_VER_CUR); |
| 214 | if (!lpc_direct(astlpc)) |
| 215 | astlpc->ops.lpc_write(astlpc->ops_data, &hdr->host_ver_cur, |
| 216 | offsetof(struct mctp_lpcmap_hdr, |
| 217 | host_ver_cur), |
| 218 | sizeof(hdr->host_ver_cur)); |
| 219 | |
| 220 | /* Send channel init command */ |
| 221 | rc = astlpc->ops.kcs_write(astlpc->ops_data, MCTP_ASTLPC_KCS_REG_DATA, |
| 222 | 0x0); |
| 223 | if (rc) { |
| 224 | mctp_prwarn("KCS write failed"); |
| 225 | } |
| 226 | |
| 227 | return rc; |
| 228 | } |
| 229 | |
| 230 | static int mctp_binding_astlpc_start_host(struct mctp_binding *b) |
| 231 | { |
| 232 | struct mctp_binding_astlpc *astlpc = |
| 233 | container_of(b, struct mctp_binding_astlpc, binding); |
| 234 | |
| 235 | return mctp_astlpc_init_host(astlpc); |
| 236 | } |
| 237 | |
| 238 | static bool __mctp_astlpc_kcs_ready(struct mctp_binding_astlpc *astlpc, |
| 239 | uint8_t status, bool is_write) |
| 240 | { |
| 241 | bool is_bmc; |
| 242 | bool ready_state; |
| 243 | uint8_t flag; |
| 244 | |
| 245 | is_bmc = (astlpc->mode == MCTP_BINDING_ASTLPC_MODE_BMC); |
| 246 | flag = (is_bmc ^ is_write) ? KCS_STATUS_IBF : KCS_STATUS_OBF; |
| 247 | ready_state = is_write ? 0 : 1; |
| 248 | |
| 249 | return !!(status & flag) == ready_state; |
| 250 | } |
| 251 | |
| 252 | static inline bool |
| 253 | mctp_astlpc_kcs_read_ready(struct mctp_binding_astlpc *astlpc, uint8_t status) |
| 254 | { |
| 255 | return __mctp_astlpc_kcs_ready(astlpc, status, false); |
| 256 | } |
| 257 | |
| 258 | static inline bool |
| 259 | mctp_astlpc_kcs_write_ready(struct mctp_binding_astlpc *astlpc, uint8_t status) |
| 260 | { |
| 261 | return __mctp_astlpc_kcs_ready(astlpc, status, true); |
| 262 | } |
| 263 | |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 264 | static int mctp_astlpc_kcs_set_status(struct mctp_binding_astlpc *astlpc, |
| 265 | uint8_t status) |
| 266 | { |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 267 | uint8_t data; |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 268 | int rc; |
| 269 | |
Jeremy Kerr | 1a4b55a | 2019-06-24 14:22:39 +0800 | [diff] [blame] | 270 | /* Since we're setting the status register, we want the other endpoint |
| 271 | * to be interrupted. However, some hardware may only raise a host-side |
| 272 | * interrupt on an ODR event. |
| 273 | * So, write a dummy value of 0xff to ODR, which will ensure that an |
| 274 | * interrupt is triggered, and can be ignored by the host. |
| 275 | */ |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 276 | data = 0xff; |
| 277 | status |= KCS_STATUS_OBF; |
Jeremy Kerr | 1a4b55a | 2019-06-24 14:22:39 +0800 | [diff] [blame] | 278 | |
Andrew Jeffery | c84fd56 | 2020-01-30 21:18:16 +1030 | [diff] [blame] | 279 | rc = astlpc->ops.kcs_write(astlpc->ops_data, MCTP_ASTLPC_KCS_REG_STATUS, |
| 280 | status); |
| 281 | if (rc) { |
| 282 | mctp_prwarn("KCS status write failed"); |
| 283 | return -1; |
| 284 | } |
| 285 | |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 286 | rc = astlpc->ops.kcs_write(astlpc->ops_data, MCTP_ASTLPC_KCS_REG_DATA, |
| 287 | data); |
| 288 | if (rc) { |
| 289 | mctp_prwarn("KCS dummy data write failed"); |
| 290 | return -1; |
| 291 | } |
| 292 | |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 293 | return 0; |
| 294 | } |
| 295 | |
| 296 | static int mctp_astlpc_kcs_send(struct mctp_binding_astlpc *astlpc, |
| 297 | uint8_t data) |
| 298 | { |
| 299 | uint8_t status; |
| 300 | int rc; |
| 301 | |
| 302 | for (;;) { |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 303 | rc = astlpc->ops.kcs_read(astlpc->ops_data, |
| 304 | MCTP_ASTLPC_KCS_REG_STATUS, &status); |
Andrew Jeffery | 1b27fe8 | 2020-01-24 16:05:11 +1030 | [diff] [blame] | 305 | if (rc) { |
Andrew Jeffery | 182204e | 2020-01-23 17:02:38 +1030 | [diff] [blame] | 306 | mctp_prwarn("KCS status read failed"); |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 307 | return -1; |
| 308 | } |
Andrew Jeffery | 7cd72f1 | 2020-05-12 20:27:59 +0930 | [diff] [blame^] | 309 | if (mctp_astlpc_kcs_write_ready(astlpc, status)) |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 310 | break; |
| 311 | /* todo: timeout */ |
| 312 | } |
| 313 | |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 314 | rc = astlpc->ops.kcs_write(astlpc->ops_data, MCTP_ASTLPC_KCS_REG_DATA, |
| 315 | data); |
| 316 | if (rc) { |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 317 | mctp_prwarn("KCS data write failed"); |
| 318 | return -1; |
| 319 | } |
| 320 | |
| 321 | return 0; |
| 322 | } |
| 323 | |
| 324 | static int mctp_binding_astlpc_tx(struct mctp_binding *b, |
| 325 | struct mctp_pktbuf *pkt) |
| 326 | { |
| 327 | struct mctp_binding_astlpc *astlpc = binding_to_astlpc(b); |
| 328 | uint32_t len; |
Andrew Jeffery | edfe383 | 2020-02-06 11:52:11 +1030 | [diff] [blame] | 329 | struct mctp_hdr *hdr; |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 330 | |
Andrew Jeffery | edfe383 | 2020-02-06 11:52:11 +1030 | [diff] [blame] | 331 | hdr = mctp_pktbuf_hdr(pkt); |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 332 | len = mctp_pktbuf_size(pkt); |
Andrew Jeffery | edfe383 | 2020-02-06 11:52:11 +1030 | [diff] [blame] | 333 | |
| 334 | mctp_prdebug("%s: Transmitting %"PRIu32"-byte packet (%hhu, %hhu, 0x%hhx)", |
| 335 | __func__, len, hdr->src, hdr->dest, hdr->flags_seq_tag); |
| 336 | |
Andrew Jeffery | 7cd72f1 | 2020-05-12 20:27:59 +0930 | [diff] [blame^] | 337 | if (len > ASTLPC_BODY_SIZE(astlpc->layout.tx.size)) { |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 338 | mctp_prwarn("invalid TX len 0x%x", len); |
| 339 | return -1; |
| 340 | } |
| 341 | |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 342 | if (lpc_direct(astlpc)) { |
Andrew Jeffery | 7cd72f1 | 2020-05-12 20:27:59 +0930 | [diff] [blame^] | 343 | *(uint32_t *)(astlpc->lpc_map + astlpc->layout.tx.offset) = |
| 344 | htobe32(len); |
| 345 | memcpy(astlpc->lpc_map + astlpc->layout.tx.offset + 4, |
| 346 | mctp_pktbuf_hdr(pkt), len); |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 347 | } else { |
| 348 | uint32_t tmp = htobe32(len); |
Andrew Jeffery | 7cd72f1 | 2020-05-12 20:27:59 +0930 | [diff] [blame^] | 349 | astlpc->ops.lpc_write(astlpc->ops_data, &tmp, |
| 350 | astlpc->layout.tx.offset, sizeof(tmp)); |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 351 | astlpc->ops.lpc_write(astlpc->ops_data, mctp_pktbuf_hdr(pkt), |
Andrew Jeffery | 7cd72f1 | 2020-05-12 20:27:59 +0930 | [diff] [blame^] | 352 | astlpc->layout.tx.offset + 4, len); |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 353 | } |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 354 | |
| 355 | mctp_binding_set_tx_enabled(b, false); |
| 356 | |
| 357 | mctp_astlpc_kcs_send(astlpc, 0x1); |
| 358 | return 0; |
| 359 | } |
| 360 | |
| 361 | static void mctp_astlpc_init_channel(struct mctp_binding_astlpc *astlpc) |
| 362 | { |
| 363 | /* todo: actual version negotiation */ |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 364 | if (lpc_direct(astlpc)) { |
| 365 | astlpc->lpc_hdr->negotiated_ver = htobe16(1); |
| 366 | } else { |
| 367 | uint16_t ver = htobe16(1); |
| 368 | astlpc->ops.lpc_write(astlpc->ops_data, &ver, |
| 369 | offsetof(struct mctp_lpcmap_hdr, |
| 370 | negotiated_ver), |
| 371 | sizeof(ver)); |
| 372 | } |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 373 | mctp_astlpc_kcs_set_status(astlpc, |
| 374 | KCS_STATUS_BMC_READY | KCS_STATUS_CHANNEL_ACTIVE | |
| 375 | KCS_STATUS_OBF); |
| 376 | |
| 377 | mctp_binding_set_tx_enabled(&astlpc->binding, true); |
| 378 | } |
| 379 | |
| 380 | static void mctp_astlpc_rx_start(struct mctp_binding_astlpc *astlpc) |
| 381 | { |
| 382 | struct mctp_pktbuf *pkt; |
| 383 | uint32_t len; |
| 384 | |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 385 | if (lpc_direct(astlpc)) { |
Andrew Jeffery | 7cd72f1 | 2020-05-12 20:27:59 +0930 | [diff] [blame^] | 386 | len = *(uint32_t *)(astlpc->lpc_map + astlpc->layout.rx.offset); |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 387 | } else { |
| 388 | astlpc->ops.lpc_read(astlpc->ops_data, &len, |
Andrew Jeffery | 7cd72f1 | 2020-05-12 20:27:59 +0930 | [diff] [blame^] | 389 | astlpc->layout.rx.offset, sizeof(len)); |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 390 | } |
| 391 | len = be32toh(len); |
| 392 | |
Andrew Jeffery | 7cd72f1 | 2020-05-12 20:27:59 +0930 | [diff] [blame^] | 393 | if (len > ASTLPC_BODY_SIZE(astlpc->layout.rx.size)) { |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 394 | mctp_prwarn("invalid RX len 0x%x", len); |
| 395 | return; |
| 396 | } |
| 397 | |
Andrew Jeffery | b93b611 | 2020-06-05 14:13:44 +0930 | [diff] [blame] | 398 | assert(astlpc->binding.pkt_size >= 0); |
| 399 | if (len > (uint32_t)astlpc->binding.pkt_size) { |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 400 | mctp_prwarn("invalid RX len 0x%x", len); |
| 401 | return; |
| 402 | } |
| 403 | |
Jeremy Kerr | df15f7e | 2019-08-05 15:41:19 +0800 | [diff] [blame] | 404 | pkt = mctp_pktbuf_alloc(&astlpc->binding, len); |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 405 | if (!pkt) |
| 406 | goto out_complete; |
| 407 | |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 408 | if (lpc_direct(astlpc)) { |
| 409 | memcpy(mctp_pktbuf_hdr(pkt), |
Andrew Jeffery | 7cd72f1 | 2020-05-12 20:27:59 +0930 | [diff] [blame^] | 410 | astlpc->lpc_map + astlpc->layout.rx.offset + 4, len); |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 411 | } else { |
| 412 | astlpc->ops.lpc_read(astlpc->ops_data, mctp_pktbuf_hdr(pkt), |
Andrew Jeffery | 7cd72f1 | 2020-05-12 20:27:59 +0930 | [diff] [blame^] | 413 | astlpc->layout.rx.offset + 4, len); |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 414 | } |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 415 | |
| 416 | mctp_bus_rx(&astlpc->binding, pkt); |
| 417 | |
| 418 | out_complete: |
| 419 | mctp_astlpc_kcs_send(astlpc, 0x2); |
| 420 | } |
| 421 | |
| 422 | static void mctp_astlpc_tx_complete(struct mctp_binding_astlpc *astlpc) |
| 423 | { |
| 424 | mctp_binding_set_tx_enabled(&astlpc->binding, true); |
| 425 | } |
| 426 | |
Andrew Jeffery | 7cd72f1 | 2020-05-12 20:27:59 +0930 | [diff] [blame^] | 427 | static int mctp_astlpc_update_channel(struct mctp_binding_astlpc *astlpc, |
| 428 | uint8_t status) |
| 429 | { |
| 430 | uint8_t updated; |
| 431 | int rc = 0; |
| 432 | |
| 433 | assert(astlpc->mode == MCTP_BINDING_ASTLPC_MODE_HOST); |
| 434 | |
| 435 | updated = astlpc->kcs_status ^ status; |
| 436 | |
| 437 | if (updated & KCS_STATUS_BMC_READY) { |
| 438 | if (!(status & KCS_STATUS_BMC_READY)) |
| 439 | mctp_binding_set_tx_enabled(&astlpc->binding, false); |
| 440 | } |
| 441 | |
| 442 | if (updated & KCS_STATUS_CHANNEL_ACTIVE) |
| 443 | mctp_binding_set_tx_enabled(&astlpc->binding, |
| 444 | status & KCS_STATUS_CHANNEL_ACTIVE); |
| 445 | |
| 446 | astlpc->kcs_status = status; |
| 447 | |
| 448 | return rc; |
| 449 | } |
| 450 | |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 451 | int mctp_astlpc_poll(struct mctp_binding_astlpc *astlpc) |
| 452 | { |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 453 | uint8_t status, data; |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 454 | int rc; |
| 455 | |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 456 | rc = astlpc->ops.kcs_read(astlpc->ops_data, MCTP_ASTLPC_KCS_REG_STATUS, |
| 457 | &status); |
| 458 | if (rc) { |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 459 | mctp_prwarn("KCS read error"); |
| 460 | return -1; |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 461 | } |
| 462 | |
Andrew Jeffery | edfe383 | 2020-02-06 11:52:11 +1030 | [diff] [blame] | 463 | mctp_prdebug("%s: status: 0x%hhx", __func__, status); |
| 464 | |
Andrew Jeffery | 7cd72f1 | 2020-05-12 20:27:59 +0930 | [diff] [blame^] | 465 | if (!mctp_astlpc_kcs_read_ready(astlpc, status)) |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 466 | return 0; |
| 467 | |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 468 | rc = astlpc->ops.kcs_read(astlpc->ops_data, MCTP_ASTLPC_KCS_REG_DATA, |
| 469 | &data); |
| 470 | if (rc) { |
| 471 | mctp_prwarn("KCS data read error"); |
| 472 | return -1; |
| 473 | } |
| 474 | |
Andrew Jeffery | edfe383 | 2020-02-06 11:52:11 +1030 | [diff] [blame] | 475 | mctp_prdebug("%s: data: 0x%hhx", __func__, data); |
| 476 | |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 477 | switch (data) { |
| 478 | case 0x0: |
| 479 | mctp_astlpc_init_channel(astlpc); |
| 480 | break; |
| 481 | case 0x1: |
| 482 | mctp_astlpc_rx_start(astlpc); |
| 483 | break; |
| 484 | case 0x2: |
| 485 | mctp_astlpc_tx_complete(astlpc); |
| 486 | break; |
Jeremy Kerr | 1a4b55a | 2019-06-24 14:22:39 +0800 | [diff] [blame] | 487 | case 0xff: |
Andrew Jeffery | 7cd72f1 | 2020-05-12 20:27:59 +0930 | [diff] [blame^] | 488 | /* No responsibilities for the BMC on 0xff */ |
| 489 | if (astlpc->mode == MCTP_BINDING_ASTLPC_MODE_BMC) |
| 490 | return 0; |
| 491 | |
| 492 | return mctp_astlpc_update_channel(astlpc, status); |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 493 | default: |
| 494 | mctp_prwarn("unknown message 0x%x", data); |
| 495 | } |
| 496 | return 0; |
| 497 | } |
| 498 | |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 499 | /* allocate and basic initialisation */ |
Andrew Jeffery | 7cd72f1 | 2020-05-12 20:27:59 +0930 | [diff] [blame^] | 500 | static struct mctp_binding_astlpc *__mctp_astlpc_init(uint8_t mode, |
| 501 | uint32_t mtu) |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 502 | { |
| 503 | struct mctp_binding_astlpc *astlpc; |
| 504 | |
Andrew Jeffery | 7cd72f1 | 2020-05-12 20:27:59 +0930 | [diff] [blame^] | 505 | assert((mode == MCTP_BINDING_ASTLPC_MODE_BMC) || |
| 506 | (mode == MCTP_BINDING_ASTLPC_MODE_HOST)); |
| 507 | |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 508 | astlpc = __mctp_alloc(sizeof(*astlpc)); |
Andrew Jeffery | 7cd72f1 | 2020-05-12 20:27:59 +0930 | [diff] [blame^] | 509 | if (!astlpc) |
| 510 | return NULL; |
| 511 | |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 512 | memset(astlpc, 0, sizeof(*astlpc)); |
Andrew Jeffery | 7cd72f1 | 2020-05-12 20:27:59 +0930 | [diff] [blame^] | 513 | astlpc->mode = mode; |
| 514 | astlpc->lpc_map = NULL; |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 515 | astlpc->binding.name = "astlpc"; |
| 516 | astlpc->binding.version = 1; |
Andrew Jeffery | 7cd72f1 | 2020-05-12 20:27:59 +0930 | [diff] [blame^] | 517 | astlpc->binding.pkt_size = MCTP_PACKET_SIZE(mtu); |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 518 | astlpc->binding.pkt_pad = 0; |
Andrew Jeffery | 7cd72f1 | 2020-05-12 20:27:59 +0930 | [diff] [blame^] | 519 | astlpc->binding.tx = mctp_binding_astlpc_tx; |
| 520 | if (mode == MCTP_BINDING_ASTLPC_MODE_BMC) |
| 521 | astlpc->binding.start = mctp_binding_astlpc_start_bmc; |
| 522 | else if (mode == MCTP_BINDING_ASTLPC_MODE_HOST) |
| 523 | astlpc->binding.start = mctp_binding_astlpc_start_host; |
| 524 | else { |
| 525 | mctp_prerr("%s: Invalid mode: %d\n", __func__, mode); |
| 526 | __mctp_free(astlpc); |
| 527 | return NULL; |
| 528 | } |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 529 | |
| 530 | return astlpc; |
| 531 | } |
| 532 | |
Jeremy Kerr | 3b36d17 | 2019-09-04 11:56:09 +0800 | [diff] [blame] | 533 | struct mctp_binding *mctp_binding_astlpc_core(struct mctp_binding_astlpc *b) |
| 534 | { |
| 535 | return &b->binding; |
| 536 | } |
| 537 | |
Andrew Jeffery | 7cd72f1 | 2020-05-12 20:27:59 +0930 | [diff] [blame^] | 538 | struct mctp_binding_astlpc * |
| 539 | mctp_astlpc_init(uint8_t mode, uint32_t mtu, void *lpc_map, |
| 540 | const struct mctp_binding_astlpc_ops *ops, void *ops_data) |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 541 | { |
| 542 | struct mctp_binding_astlpc *astlpc; |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 543 | |
Andrew Jeffery | 7cd72f1 | 2020-05-12 20:27:59 +0930 | [diff] [blame^] | 544 | if (!(mode == MCTP_BINDING_ASTLPC_MODE_BMC || |
| 545 | mode == MCTP_BINDING_ASTLPC_MODE_HOST)) { |
| 546 | mctp_prerr("Unknown binding mode: %u", mode); |
| 547 | return NULL; |
| 548 | } |
| 549 | |
| 550 | if (mtu != MCTP_BTU) { |
| 551 | mctp_prwarn("Unable to negotiate the MTU, using %u instead", |
| 552 | MCTP_BTU); |
| 553 | mtu = MCTP_BTU; |
| 554 | } |
| 555 | |
| 556 | astlpc = __mctp_astlpc_init(mode, mtu); |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 557 | if (!astlpc) |
| 558 | return NULL; |
| 559 | |
| 560 | memcpy(&astlpc->ops, ops, sizeof(astlpc->ops)); |
| 561 | astlpc->ops_data = ops_data; |
| 562 | astlpc->lpc_map = lpc_map; |
Andrew Jeffery | 7cd72f1 | 2020-05-12 20:27:59 +0930 | [diff] [blame^] | 563 | astlpc->mode = mode; |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 564 | |
| 565 | /* In indirect mode, we keep a separate buffer of header data. |
| 566 | * We need to sync this through the lpc_read/lpc_write ops. |
| 567 | */ |
| 568 | if (!astlpc->lpc_map) |
| 569 | astlpc->priv_hdr = __mctp_alloc(sizeof(*astlpc->priv_hdr)); |
| 570 | |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 571 | return astlpc; |
| 572 | } |
| 573 | |
Andrew Jeffery | 7cd72f1 | 2020-05-12 20:27:59 +0930 | [diff] [blame^] | 574 | struct mctp_binding_astlpc * |
| 575 | mctp_astlpc_init_ops(const struct mctp_binding_astlpc_ops *ops, void *ops_data, |
| 576 | void *lpc_map) |
| 577 | { |
| 578 | return mctp_astlpc_init(MCTP_BINDING_ASTLPC_MODE_BMC, MCTP_BTU, lpc_map, |
| 579 | ops, ops_data); |
| 580 | } |
| 581 | |
Andrew Jeffery | 4663f67 | 2020-03-10 23:36:24 +1030 | [diff] [blame] | 582 | void mctp_astlpc_destroy(struct mctp_binding_astlpc *astlpc) |
| 583 | { |
| 584 | if (astlpc->priv_hdr) |
| 585 | __mctp_free(astlpc->priv_hdr); |
| 586 | __mctp_free(astlpc); |
| 587 | } |
| 588 | |
Jeremy Kerr | b214c64 | 2019-11-27 11:34:00 +0800 | [diff] [blame] | 589 | #ifdef MCTP_HAVE_FILEIO |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 590 | static int mctp_astlpc_init_fileio_lpc(struct mctp_binding_astlpc *astlpc) |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 591 | { |
| 592 | struct aspeed_lpc_ctrl_mapping map = { |
| 593 | .window_type = ASPEED_LPC_CTRL_WINDOW_MEMORY, |
| 594 | .window_id = 0, /* There's only one */ |
| 595 | .flags = 0, |
| 596 | .addr = 0, |
| 597 | .offset = 0, |
| 598 | .size = 0 |
| 599 | }; |
| 600 | int fd, rc; |
| 601 | |
| 602 | fd = open(lpc_path, O_RDWR | O_SYNC); |
| 603 | if (fd < 0) { |
| 604 | mctp_prwarn("LPC open (%s) failed", lpc_path); |
| 605 | return -1; |
| 606 | } |
| 607 | |
| 608 | rc = ioctl(fd, ASPEED_LPC_CTRL_IOCTL_GET_SIZE, &map); |
| 609 | if (rc) { |
| 610 | mctp_prwarn("LPC GET_SIZE failed"); |
| 611 | close(fd); |
| 612 | return -1; |
| 613 | } |
| 614 | |
| 615 | astlpc->lpc_map_base = mmap(NULL, map.size, PROT_READ | PROT_WRITE, |
| 616 | MAP_SHARED, fd, 0); |
| 617 | if (astlpc->lpc_map_base == MAP_FAILED) { |
| 618 | mctp_prwarn("LPC mmap failed"); |
| 619 | rc = -1; |
| 620 | } else { |
| 621 | astlpc->lpc_map = astlpc->lpc_map_base + |
| 622 | map.size - LPC_WIN_SIZE; |
| 623 | } |
| 624 | |
| 625 | close(fd); |
| 626 | |
| 627 | return rc; |
| 628 | } |
| 629 | |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 630 | static int mctp_astlpc_init_fileio_kcs(struct mctp_binding_astlpc *astlpc) |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 631 | { |
| 632 | astlpc->kcs_fd = open(kcs_path, O_RDWR); |
| 633 | if (astlpc->kcs_fd < 0) |
| 634 | return -1; |
| 635 | |
| 636 | return 0; |
| 637 | } |
| 638 | |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 639 | static int __mctp_astlpc_fileio_kcs_read(void *arg, |
| 640 | enum mctp_binding_astlpc_kcs_reg reg, uint8_t *val) |
| 641 | { |
| 642 | struct mctp_binding_astlpc *astlpc = arg; |
| 643 | off_t offset = reg; |
| 644 | int rc; |
| 645 | |
| 646 | rc = pread(astlpc->kcs_fd, val, 1, offset); |
| 647 | |
| 648 | return rc == 1 ? 0 : -1; |
| 649 | } |
| 650 | |
| 651 | static int __mctp_astlpc_fileio_kcs_write(void *arg, |
| 652 | enum mctp_binding_astlpc_kcs_reg reg, uint8_t val) |
| 653 | { |
| 654 | struct mctp_binding_astlpc *astlpc = arg; |
| 655 | off_t offset = reg; |
| 656 | int rc; |
| 657 | |
| 658 | rc = pwrite(astlpc->kcs_fd, &val, 1, offset); |
| 659 | |
| 660 | return rc == 1 ? 0 : -1; |
| 661 | } |
| 662 | |
| 663 | int mctp_astlpc_get_fd(struct mctp_binding_astlpc *astlpc) |
| 664 | { |
| 665 | return astlpc->kcs_fd; |
| 666 | } |
| 667 | |
| 668 | struct mctp_binding_astlpc *mctp_astlpc_init_fileio(void) |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 669 | { |
| 670 | struct mctp_binding_astlpc *astlpc; |
| 671 | int rc; |
| 672 | |
Andrew Jeffery | 7cd72f1 | 2020-05-12 20:27:59 +0930 | [diff] [blame^] | 673 | /* |
| 674 | * If we're doing file IO then we're very likely not running |
| 675 | * freestanding, so lets assume that we're on the BMC side |
| 676 | */ |
| 677 | astlpc = __mctp_astlpc_init(MCTP_BINDING_ASTLPC_MODE_BMC, MCTP_BTU); |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 678 | if (!astlpc) |
| 679 | return NULL; |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 680 | |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 681 | /* Set internal operations for kcs. We use direct accesses to the lpc |
| 682 | * map area */ |
| 683 | astlpc->ops.kcs_read = __mctp_astlpc_fileio_kcs_read; |
| 684 | astlpc->ops.kcs_write = __mctp_astlpc_fileio_kcs_write; |
| 685 | astlpc->ops_data = astlpc; |
| 686 | |
| 687 | rc = mctp_astlpc_init_fileio_lpc(astlpc); |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 688 | if (rc) { |
| 689 | free(astlpc); |
| 690 | return NULL; |
| 691 | } |
| 692 | |
Jeremy Kerr | bc53d35 | 2019-08-28 14:26:14 +0530 | [diff] [blame] | 693 | rc = mctp_astlpc_init_fileio_kcs(astlpc); |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 694 | if (rc) { |
| 695 | free(astlpc); |
| 696 | return NULL; |
| 697 | } |
| 698 | |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 699 | return astlpc; |
| 700 | } |
Jeremy Kerr | 92a10a6 | 2019-08-28 16:55:54 +0530 | [diff] [blame] | 701 | #else |
| 702 | struct mctp_binding_astlpc * __attribute__((const)) |
| 703 | mctp_astlpc_init_fileio(void) |
| 704 | { |
Andrew Jeffery | 09e0749 | 2020-03-17 22:57:55 +1030 | [diff] [blame] | 705 | mctp_prerr("Missing support for file IO"); |
Jeremy Kerr | 92a10a6 | 2019-08-28 16:55:54 +0530 | [diff] [blame] | 706 | return NULL; |
| 707 | } |
Jeremy Kerr | 672c885 | 2019-03-01 12:18:07 +0800 | [diff] [blame] | 708 | |
Jeremy Kerr | 92a10a6 | 2019-08-28 16:55:54 +0530 | [diff] [blame] | 709 | int __attribute__((const)) mctp_astlpc_get_fd( |
| 710 | struct mctp_binding_astlpc *astlpc __attribute__((unused))) |
| 711 | { |
Andrew Jeffery | 09e0749 | 2020-03-17 22:57:55 +1030 | [diff] [blame] | 712 | mctp_prerr("Missing support for file IO"); |
Jeremy Kerr | 92a10a6 | 2019-08-28 16:55:54 +0530 | [diff] [blame] | 713 | return -1; |
| 714 | } |
| 715 | #endif |