1 // SPDX-License-Identifier: GPL-2.0 2 /* Marvell OcteonTx2 CGX driver 3 * 4 * Copyright (C) 2018 Marvell International Ltd. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11 #include <linux/acpi.h> 12 #include <linux/module.h> 13 #include <linux/interrupt.h> 14 #include <linux/pci.h> 15 #include <linux/netdevice.h> 16 #include <linux/etherdevice.h> 17 #include <linux/phy.h> 18 #include <linux/of.h> 19 #include <linux/of_mdio.h> 20 #include <linux/of_net.h> 21 22 #include "cgx.h" 23 24 #define DRV_NAME "octeontx2-cgx" 25 #define DRV_STRING "Marvell OcteonTX2 CGX/MAC Driver" 26 27 /** 28 * struct lmac 29 * @wq_cmd_cmplt: waitq to keep the process blocked until cmd completion 30 * @cmd_lock: Lock to serialize the command interface 31 * @resp: command response 32 * @link_info: link related information 33 * @event_cb: callback for linkchange events 34 * @event_cb_lock: lock for serializing callback with unregister 35 * @cmd_pend: flag set before new command is started 36 * flag cleared after command response is received 37 * @cgx: parent cgx port 38 * @lmac_id: lmac port id 39 * @name: lmac port name 40 */ 41 struct lmac { 42 wait_queue_head_t wq_cmd_cmplt; 43 struct mutex cmd_lock; 44 u64 resp; 45 struct cgx_link_user_info link_info; 46 struct cgx_event_cb event_cb; 47 spinlock_t event_cb_lock; 48 bool cmd_pend; 49 struct cgx *cgx; 50 u8 lmac_id; 51 char *name; 52 }; 53 54 struct cgx { 55 void __iomem *reg_base; 56 struct pci_dev *pdev; 57 u8 cgx_id; 58 u8 lmac_count; 59 struct lmac *lmac_idmap[MAX_LMAC_PER_CGX]; 60 struct work_struct cgx_cmd_work; 61 struct workqueue_struct *cgx_cmd_workq; 62 struct list_head cgx_list; 63 }; 64 65 static LIST_HEAD(cgx_list); 66 67 /* Convert firmware speed encoding to user format(Mbps) */ 68 static u32 cgx_speed_mbps[CGX_LINK_SPEED_MAX]; 69 70 /* Convert firmware lmac type encoding to string */ 71 static char *cgx_lmactype_string[LMAC_MODE_MAX]; 72 73 /* CGX PHY management internal APIs */ 74 static int cgx_fwi_link_change(struct cgx *cgx, int lmac_id, bool en); 75 76 /* Supported devices */ 77 static const struct pci_device_id cgx_id_table[] = { 78 { PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVID_OCTEONTX2_CGX) }, 79 { 0, } /* end of table */ 80 }; 81 82 MODULE_DEVICE_TABLE(pci, cgx_id_table); 83 84 static void cgx_write(struct cgx *cgx, u64 lmac, u64 offset, u64 val) 85 { 86 writeq(val, cgx->reg_base + (lmac << 18) + offset); 87 } 88 89 static u64 cgx_read(struct cgx *cgx, u64 lmac, u64 offset) 90 { 91 return readq(cgx->reg_base + (lmac << 18) + offset); 92 } 93 94 static inline struct lmac *lmac_pdata(u8 lmac_id, struct cgx *cgx) 95 { 96 if (!cgx || lmac_id >= MAX_LMAC_PER_CGX) 97 return NULL; 98 99 return cgx->lmac_idmap[lmac_id]; 100 } 101 102 int cgx_get_cgxcnt_max(void) 103 { 104 struct cgx *cgx_dev; 105 int idmax = -ENODEV; 106 107 list_for_each_entry(cgx_dev, &cgx_list, cgx_list) 108 if (cgx_dev->cgx_id > idmax) 109 idmax = cgx_dev->cgx_id; 110 111 if (idmax < 0) 112 return 0; 113 114 return idmax + 1; 115 } 116 EXPORT_SYMBOL(cgx_get_cgxcnt_max); 117 118 int cgx_get_lmac_cnt(void *cgxd) 119 { 120 struct cgx *cgx = cgxd; 121 122 if (!cgx) 123 return -ENODEV; 124 125 return cgx->lmac_count; 126 } 127 EXPORT_SYMBOL(cgx_get_lmac_cnt); 128 129 void *cgx_get_pdata(int cgx_id) 130 { 131 struct cgx *cgx_dev; 132 133 list_for_each_entry(cgx_dev, &cgx_list, cgx_list) { 134 if (cgx_dev->cgx_id == cgx_id) 135 return cgx_dev; 136 } 137 return NULL; 138 } 139 EXPORT_SYMBOL(cgx_get_pdata); 140 141 /* Ensure the required lock for event queue(where asynchronous events are 142 * posted) is acquired before calling this API. Else an asynchronous event(with 143 * latest link status) can reach the destination before this function returns 144 * and could make the link status appear wrong. 145 */ 146 int cgx_get_link_info(void *cgxd, int lmac_id, 147 struct cgx_link_user_info *linfo) 148 { 149 struct lmac *lmac = lmac_pdata(lmac_id, cgxd); 150 151 if (!lmac) 152 return -ENODEV; 153 154 *linfo = lmac->link_info; 155 return 0; 156 } 157 EXPORT_SYMBOL(cgx_get_link_info); 158 159 static u64 mac2u64 (u8 *mac_addr) 160 { 161 u64 mac = 0; 162 int index; 163 164 for (index = ETH_ALEN - 1; index >= 0; index--) 165 mac |= ((u64)*mac_addr++) << (8 * index); 166 return mac; 167 } 168 169 int cgx_lmac_addr_set(u8 cgx_id, u8 lmac_id, u8 *mac_addr) 170 { 171 struct cgx *cgx_dev = cgx_get_pdata(cgx_id); 172 u64 cfg; 173 174 /* copy 6bytes from macaddr */ 175 /* memcpy(&cfg, mac_addr, 6); */ 176 177 cfg = mac2u64 (mac_addr); 178 179 cgx_write(cgx_dev, 0, (CGXX_CMRX_RX_DMAC_CAM0 + (lmac_id * 0x8)), 180 cfg | CGX_DMAC_CAM_ADDR_ENABLE | ((u64)lmac_id << 49)); 181 182 cfg = cgx_read(cgx_dev, lmac_id, CGXX_CMRX_RX_DMAC_CTL0); 183 cfg |= CGX_DMAC_CTL0_CAM_ENABLE; 184 cgx_write(cgx_dev, lmac_id, CGXX_CMRX_RX_DMAC_CTL0, cfg); 185 186 return 0; 187 } 188 EXPORT_SYMBOL(cgx_lmac_addr_set); 189 190 u64 cgx_lmac_addr_get(u8 cgx_id, u8 lmac_id) 191 { 192 struct cgx *cgx_dev = cgx_get_pdata(cgx_id); 193 u64 cfg; 194 195 cfg = cgx_read(cgx_dev, 0, CGXX_CMRX_RX_DMAC_CAM0 + lmac_id * 0x8); 196 return cfg & CGX_RX_DMAC_ADR_MASK; 197 } 198 EXPORT_SYMBOL(cgx_lmac_addr_get); 199 200 int cgx_set_pkind(void *cgxd, u8 lmac_id, int pkind) 201 { 202 struct cgx *cgx = cgxd; 203 204 if (!cgx || lmac_id >= cgx->lmac_count) 205 return -ENODEV; 206 207 cgx_write(cgx, lmac_id, CGXX_CMRX_RX_ID_MAP, (pkind & 0x3F)); 208 return 0; 209 } 210 EXPORT_SYMBOL(cgx_set_pkind); 211 212 static inline u8 cgx_get_lmac_type(struct cgx *cgx, int lmac_id) 213 { 214 u64 cfg; 215 216 cfg = cgx_read(cgx, lmac_id, CGXX_CMRX_CFG); 217 return (cfg >> CGX_LMAC_TYPE_SHIFT) & CGX_LMAC_TYPE_MASK; 218 } 219 220 /* Configure CGX LMAC in internal loopback mode */ 221 int cgx_lmac_internal_loopback(void *cgxd, int lmac_id, bool enable) 222 { 223 struct cgx *cgx = cgxd; 224 u8 lmac_type; 225 u64 cfg; 226 227 if (!cgx || lmac_id >= cgx->lmac_count) 228 return -ENODEV; 229 230 lmac_type = cgx_get_lmac_type(cgx, lmac_id); 231 if (lmac_type == LMAC_MODE_SGMII || lmac_type == LMAC_MODE_QSGMII) { 232 cfg = cgx_read(cgx, lmac_id, CGXX_GMP_PCS_MRX_CTL); 233 if (enable) 234 cfg |= CGXX_GMP_PCS_MRX_CTL_LBK; 235 else 236 cfg &= ~CGXX_GMP_PCS_MRX_CTL_LBK; 237 cgx_write(cgx, lmac_id, CGXX_GMP_PCS_MRX_CTL, cfg); 238 } else { 239 cfg = cgx_read(cgx, lmac_id, CGXX_SPUX_CONTROL1); 240 if (enable) 241 cfg |= CGXX_SPUX_CONTROL1_LBK; 242 else 243 cfg &= ~CGXX_SPUX_CONTROL1_LBK; 244 cgx_write(cgx, lmac_id, CGXX_SPUX_CONTROL1, cfg); 245 } 246 return 0; 247 } 248 EXPORT_SYMBOL(cgx_lmac_internal_loopback); 249 250 void cgx_lmac_promisc_config(int cgx_id, int lmac_id, bool enable) 251 { 252 struct cgx *cgx = cgx_get_pdata(cgx_id); 253 u64 cfg = 0; 254 255 if (!cgx) 256 return; 257 258 if (enable) { 259 /* Enable promiscuous mode on LMAC */ 260 cfg = cgx_read(cgx, lmac_id, CGXX_CMRX_RX_DMAC_CTL0); 261 cfg &= ~(CGX_DMAC_CAM_ACCEPT | CGX_DMAC_MCAST_MODE); 262 cfg |= CGX_DMAC_BCAST_MODE; 263 cgx_write(cgx, lmac_id, CGXX_CMRX_RX_DMAC_CTL0, cfg); 264 265 cfg = cgx_read(cgx, 0, 266 (CGXX_CMRX_RX_DMAC_CAM0 + lmac_id * 0x8)); 267 cfg &= ~CGX_DMAC_CAM_ADDR_ENABLE; 268 cgx_write(cgx, 0, 269 (CGXX_CMRX_RX_DMAC_CAM0 + lmac_id * 0x8), cfg); 270 } else { 271 /* Disable promiscuous mode */ 272 cfg = cgx_read(cgx, lmac_id, CGXX_CMRX_RX_DMAC_CTL0); 273 cfg |= CGX_DMAC_CAM_ACCEPT | CGX_DMAC_MCAST_MODE; 274 cgx_write(cgx, lmac_id, CGXX_CMRX_RX_DMAC_CTL0, cfg); 275 cfg = cgx_read(cgx, 0, 276 (CGXX_CMRX_RX_DMAC_CAM0 + lmac_id * 0x8)); 277 cfg |= CGX_DMAC_CAM_ADDR_ENABLE; 278 cgx_write(cgx, 0, 279 (CGXX_CMRX_RX_DMAC_CAM0 + lmac_id * 0x8), cfg); 280 } 281 } 282 EXPORT_SYMBOL(cgx_lmac_promisc_config); 283 284 int cgx_get_rx_stats(void *cgxd, int lmac_id, int idx, u64 *rx_stat) 285 { 286 struct cgx *cgx = cgxd; 287 288 if (!cgx || lmac_id >= cgx->lmac_count) 289 return -ENODEV; 290 *rx_stat = cgx_read(cgx, lmac_id, CGXX_CMRX_RX_STAT0 + (idx * 8)); 291 return 0; 292 } 293 EXPORT_SYMBOL(cgx_get_rx_stats); 294 295 int cgx_get_tx_stats(void *cgxd, int lmac_id, int idx, u64 *tx_stat) 296 { 297 struct cgx *cgx = cgxd; 298 299 if (!cgx || lmac_id >= cgx->lmac_count) 300 return -ENODEV; 301 *tx_stat = cgx_read(cgx, lmac_id, CGXX_CMRX_TX_STAT0 + (idx * 8)); 302 return 0; 303 } 304 EXPORT_SYMBOL(cgx_get_tx_stats); 305 306 int cgx_lmac_rx_tx_enable(void *cgxd, int lmac_id, bool enable) 307 { 308 struct cgx *cgx = cgxd; 309 u64 cfg; 310 311 if (!cgx || lmac_id >= cgx->lmac_count) 312 return -ENODEV; 313 314 cfg = cgx_read(cgx, lmac_id, CGXX_CMRX_CFG); 315 if (enable) 316 cfg |= CMR_EN | DATA_PKT_RX_EN | DATA_PKT_TX_EN; 317 else 318 cfg &= ~(CMR_EN | DATA_PKT_RX_EN | DATA_PKT_TX_EN); 319 cgx_write(cgx, lmac_id, CGXX_CMRX_CFG, cfg); 320 return 0; 321 } 322 EXPORT_SYMBOL(cgx_lmac_rx_tx_enable); 323 324 /* CGX Firmware interface low level support */ 325 static int cgx_fwi_cmd_send(u64 req, u64 *resp, struct lmac *lmac) 326 { 327 struct cgx *cgx = lmac->cgx; 328 struct device *dev; 329 int err = 0; 330 u64 cmd; 331 332 /* Ensure no other command is in progress */ 333 err = mutex_lock_interruptible(&lmac->cmd_lock); 334 if (err) 335 return err; 336 337 /* Ensure command register is free */ 338 cmd = cgx_read(cgx, lmac->lmac_id, CGX_COMMAND_REG); 339 if (FIELD_GET(CMDREG_OWN, cmd) != CGX_CMD_OWN_NS) { 340 err = -EBUSY; 341 goto unlock; 342 } 343 344 /* Update ownership in command request */ 345 req = FIELD_SET(CMDREG_OWN, CGX_CMD_OWN_FIRMWARE, req); 346 347 /* Mark this lmac as pending, before we start */ 348 lmac->cmd_pend = true; 349 350 /* Start command in hardware */ 351 cgx_write(cgx, lmac->lmac_id, CGX_COMMAND_REG, req); 352 353 /* Ensure command is completed without errors */ 354 if (!wait_event_timeout(lmac->wq_cmd_cmplt, !lmac->cmd_pend, 355 msecs_to_jiffies(CGX_CMD_TIMEOUT))) { 356 dev = &cgx->pdev->dev; 357 dev_err(dev, "cgx port %d:%d cmd timeout\n", 358 cgx->cgx_id, lmac->lmac_id); 359 err = -EIO; 360 goto unlock; 361 } 362 363 /* we have a valid command response */ 364 smp_rmb(); /* Ensure the latest updates are visible */ 365 *resp = lmac->resp; 366 367 unlock: 368 mutex_unlock(&lmac->cmd_lock); 369 370 return err; 371 } 372 373 static inline int cgx_fwi_cmd_generic(u64 req, u64 *resp, 374 struct cgx *cgx, int lmac_id) 375 { 376 struct lmac *lmac; 377 int err; 378 379 lmac = lmac_pdata(lmac_id, cgx); 380 if (!lmac) 381 return -ENODEV; 382 383 err = cgx_fwi_cmd_send(req, resp, lmac); 384 385 /* Check for valid response */ 386 if (!err) { 387 if (FIELD_GET(EVTREG_STAT, *resp) == CGX_STAT_FAIL) 388 return -EIO; 389 else 390 return 0; 391 } 392 393 return err; 394 } 395 396 static inline void cgx_link_usertable_init(void) 397 { 398 cgx_speed_mbps[CGX_LINK_NONE] = 0; 399 cgx_speed_mbps[CGX_LINK_10M] = 10; 400 cgx_speed_mbps[CGX_LINK_100M] = 100; 401 cgx_speed_mbps[CGX_LINK_1G] = 1000; 402 cgx_speed_mbps[CGX_LINK_2HG] = 2500; 403 cgx_speed_mbps[CGX_LINK_5G] = 5000; 404 cgx_speed_mbps[CGX_LINK_10G] = 10000; 405 cgx_speed_mbps[CGX_LINK_20G] = 20000; 406 cgx_speed_mbps[CGX_LINK_25G] = 25000; 407 cgx_speed_mbps[CGX_LINK_40G] = 40000; 408 cgx_speed_mbps[CGX_LINK_50G] = 50000; 409 cgx_speed_mbps[CGX_LINK_100G] = 100000; 410 411 cgx_lmactype_string[LMAC_MODE_SGMII] = "SGMII"; 412 cgx_lmactype_string[LMAC_MODE_XAUI] = "XAUI"; 413 cgx_lmactype_string[LMAC_MODE_RXAUI] = "RXAUI"; 414 cgx_lmactype_string[LMAC_MODE_10G_R] = "10G_R"; 415 cgx_lmactype_string[LMAC_MODE_40G_R] = "40G_R"; 416 cgx_lmactype_string[LMAC_MODE_QSGMII] = "QSGMII"; 417 cgx_lmactype_string[LMAC_MODE_25G_R] = "25G_R"; 418 cgx_lmactype_string[LMAC_MODE_50G_R] = "50G_R"; 419 cgx_lmactype_string[LMAC_MODE_100G_R] = "100G_R"; 420 cgx_lmactype_string[LMAC_MODE_USXGMII] = "USXGMII"; 421 } 422 423 static inline void link_status_user_format(u64 lstat, 424 struct cgx_link_user_info *linfo, 425 struct cgx *cgx, u8 lmac_id) 426 { 427 char *lmac_string; 428 429 linfo->link_up = FIELD_GET(RESP_LINKSTAT_UP, lstat); 430 linfo->full_duplex = FIELD_GET(RESP_LINKSTAT_FDUPLEX, lstat); 431 linfo->speed = cgx_speed_mbps[FIELD_GET(RESP_LINKSTAT_SPEED, lstat)]; 432 linfo->lmac_type_id = cgx_get_lmac_type(cgx, lmac_id); 433 lmac_string = cgx_lmactype_string[linfo->lmac_type_id]; 434 strncpy(linfo->lmac_type, lmac_string, LMACTYPE_STR_LEN - 1); 435 } 436 437 /* Hardware event handlers */ 438 static inline void cgx_link_change_handler(u64 lstat, 439 struct lmac *lmac) 440 { 441 struct cgx_link_user_info *linfo; 442 struct cgx *cgx = lmac->cgx; 443 struct cgx_link_event event; 444 struct device *dev; 445 int err_type; 446 447 dev = &cgx->pdev->dev; 448 449 link_status_user_format(lstat, &event.link_uinfo, cgx, lmac->lmac_id); 450 err_type = FIELD_GET(RESP_LINKSTAT_ERRTYPE, lstat); 451 452 event.cgx_id = cgx->cgx_id; 453 event.lmac_id = lmac->lmac_id; 454 455 /* update the local copy of link status */ 456 lmac->link_info = event.link_uinfo; 457 linfo = &lmac->link_info; 458 459 /* Ensure callback doesn't get unregistered until we finish it */ 460 spin_lock(&lmac->event_cb_lock); 461 462 if (!lmac->event_cb.notify_link_chg) { 463 dev_dbg(dev, "cgx port %d:%d Link change handler null", 464 cgx->cgx_id, lmac->lmac_id); 465 if (err_type != CGX_ERR_NONE) { 466 dev_err(dev, "cgx port %d:%d Link error %d\n", 467 cgx->cgx_id, lmac->lmac_id, err_type); 468 } 469 dev_info(dev, "cgx port %d:%d Link is %s %d Mbps\n", 470 cgx->cgx_id, lmac->lmac_id, 471 linfo->link_up ? "UP" : "DOWN", linfo->speed); 472 goto err; 473 } 474 475 if (lmac->event_cb.notify_link_chg(&event, lmac->event_cb.data)) 476 dev_err(dev, "event notification failure\n"); 477 err: 478 spin_unlock(&lmac->event_cb_lock); 479 } 480 481 static inline bool cgx_cmdresp_is_linkevent(u64 event) 482 { 483 u8 id; 484 485 id = FIELD_GET(EVTREG_ID, event); 486 if (id == CGX_CMD_LINK_BRING_UP || 487 id == CGX_CMD_LINK_BRING_DOWN) 488 return true; 489 else 490 return false; 491 } 492 493 static inline bool cgx_event_is_linkevent(u64 event) 494 { 495 if (FIELD_GET(EVTREG_ID, event) == CGX_EVT_LINK_CHANGE) 496 return true; 497 else 498 return false; 499 } 500 501 static inline int cgx_fwi_get_mkex_prfl_sz(u64 *prfl_sz, 502 struct cgx *cgx) 503 { 504 u64 req = 0; 505 u64 resp; 506 int err; 507 508 req = FIELD_SET(CMDREG_ID, CGX_CMD_GET_MKEX_PRFL_SIZE, req); 509 err = cgx_fwi_cmd_generic(req, &resp, cgx, 0); 510 if (!err) 511 *prfl_sz = FIELD_GET(RESP_MKEX_PRFL_SIZE, resp); 512 513 return err; 514 } 515 516 static inline int cgx_fwi_get_mkex_prfl_addr(u64 *prfl_addr, 517 struct cgx *cgx) 518 { 519 u64 req = 0; 520 u64 resp; 521 int err; 522 523 req = FIELD_SET(CMDREG_ID, CGX_CMD_GET_MKEX_PRFL_ADDR, req); 524 err = cgx_fwi_cmd_generic(req, &resp, cgx, 0); 525 if (!err) 526 *prfl_addr = FIELD_GET(RESP_MKEX_PRFL_ADDR, resp); 527 528 return err; 529 } 530 531 int cgx_get_mkex_prfl_info(u64 *addr, u64 *size) 532 { 533 struct cgx *cgx_dev; 534 int err; 535 536 if (!addr || !size) 537 return -EINVAL; 538 539 cgx_dev = list_first_entry(&cgx_list, struct cgx, cgx_list); 540 if (!cgx_dev) 541 return -ENXIO; 542 543 err = cgx_fwi_get_mkex_prfl_sz(size, cgx_dev); 544 if (err) 545 return -EIO; 546 547 err = cgx_fwi_get_mkex_prfl_addr(addr, cgx_dev); 548 if (err) 549 return -EIO; 550 551 return 0; 552 } 553 EXPORT_SYMBOL(cgx_get_mkex_prfl_info); 554 555 static irqreturn_t cgx_fwi_event_handler(int irq, void *data) 556 { 557 struct lmac *lmac = data; 558 struct cgx *cgx; 559 u64 event; 560 561 cgx = lmac->cgx; 562 563 event = cgx_read(cgx, lmac->lmac_id, CGX_EVENT_REG); 564 565 if (!FIELD_GET(EVTREG_ACK, event)) 566 return IRQ_NONE; 567 568 switch (FIELD_GET(EVTREG_EVT_TYPE, event)) { 569 case CGX_EVT_CMD_RESP: 570 /* Copy the response. Since only one command is active at a 571 * time, there is no way a response can get overwritten 572 */ 573 lmac->resp = event; 574 /* Ensure response is updated before thread context starts */ 575 smp_wmb(); 576 577 /* There wont be separate events for link change initiated from 578 * software; Hence report the command responses as events 579 */ 580 if (cgx_cmdresp_is_linkevent(event)) 581 cgx_link_change_handler(event, lmac); 582 583 /* Release thread waiting for completion */ 584 lmac->cmd_pend = false; 585 wake_up_interruptible(&lmac->wq_cmd_cmplt); 586 break; 587 case CGX_EVT_ASYNC: 588 if (cgx_event_is_linkevent(event)) 589 cgx_link_change_handler(event, lmac); 590 break; 591 } 592 593 /* Any new event or command response will be posted by firmware 594 * only after the current status is acked. 595 * Ack the interrupt register as well. 596 */ 597 cgx_write(lmac->cgx, lmac->lmac_id, CGX_EVENT_REG, 0); 598 cgx_write(lmac->cgx, lmac->lmac_id, CGXX_CMRX_INT, FW_CGX_INT); 599 600 return IRQ_HANDLED; 601 } 602 603 /* APIs for PHY management using CGX firmware interface */ 604 605 /* callback registration for hardware events like link change */ 606 int cgx_lmac_evh_register(struct cgx_event_cb *cb, void *cgxd, int lmac_id) 607 { 608 struct cgx *cgx = cgxd; 609 struct lmac *lmac; 610 611 lmac = lmac_pdata(lmac_id, cgx); 612 if (!lmac) 613 return -ENODEV; 614 615 lmac->event_cb = *cb; 616 617 return 0; 618 } 619 EXPORT_SYMBOL(cgx_lmac_evh_register); 620 621 int cgx_lmac_evh_unregister(void *cgxd, int lmac_id) 622 { 623 struct lmac *lmac; 624 unsigned long flags; 625 struct cgx *cgx = cgxd; 626 627 lmac = lmac_pdata(lmac_id, cgx); 628 if (!lmac) 629 return -ENODEV; 630 631 spin_lock_irqsave(&lmac->event_cb_lock, flags); 632 lmac->event_cb.notify_link_chg = NULL; 633 lmac->event_cb.data = NULL; 634 spin_unlock_irqrestore(&lmac->event_cb_lock, flags); 635 636 return 0; 637 } 638 EXPORT_SYMBOL(cgx_lmac_evh_unregister); 639 640 static int cgx_fwi_link_change(struct cgx *cgx, int lmac_id, bool enable) 641 { 642 u64 req = 0; 643 u64 resp; 644 645 if (enable) 646 req = FIELD_SET(CMDREG_ID, CGX_CMD_LINK_BRING_UP, req); 647 else 648 req = FIELD_SET(CMDREG_ID, CGX_CMD_LINK_BRING_DOWN, req); 649 650 return cgx_fwi_cmd_generic(req, &resp, cgx, lmac_id); 651 } 652 653 static inline int cgx_fwi_read_version(u64 *resp, struct cgx *cgx) 654 { 655 u64 req = 0; 656 657 req = FIELD_SET(CMDREG_ID, CGX_CMD_GET_FW_VER, req); 658 return cgx_fwi_cmd_generic(req, resp, cgx, 0); 659 } 660 661 static int cgx_lmac_verify_fwi_version(struct cgx *cgx) 662 { 663 struct device *dev = &cgx->pdev->dev; 664 int major_ver, minor_ver; 665 u64 resp; 666 int err; 667 668 if (!cgx->lmac_count) 669 return 0; 670 671 err = cgx_fwi_read_version(&resp, cgx); 672 if (err) 673 return err; 674 675 major_ver = FIELD_GET(RESP_MAJOR_VER, resp); 676 minor_ver = FIELD_GET(RESP_MINOR_VER, resp); 677 dev_dbg(dev, "Firmware command interface version = %d.%d\n", 678 major_ver, minor_ver); 679 if (major_ver != CGX_FIRMWARE_MAJOR_VER || 680 minor_ver != CGX_FIRMWARE_MINOR_VER) 681 return -EIO; 682 else 683 return 0; 684 } 685 686 static void cgx_lmac_linkup_work(struct work_struct *work) 687 { 688 struct cgx *cgx = container_of(work, struct cgx, cgx_cmd_work); 689 struct device *dev = &cgx->pdev->dev; 690 int i, err; 691 692 /* Do Link up for all the lmacs */ 693 for (i = 0; i < cgx->lmac_count; i++) { 694 err = cgx_fwi_link_change(cgx, i, true); 695 if (err) 696 dev_info(dev, "cgx port %d:%d Link up command failed\n", 697 cgx->cgx_id, i); 698 } 699 } 700 701 int cgx_lmac_linkup_start(void *cgxd) 702 { 703 struct cgx *cgx = cgxd; 704 705 if (!cgx) 706 return -ENODEV; 707 708 queue_work(cgx->cgx_cmd_workq, &cgx->cgx_cmd_work); 709 710 return 0; 711 } 712 EXPORT_SYMBOL(cgx_lmac_linkup_start); 713 714 static int cgx_lmac_init(struct cgx *cgx) 715 { 716 struct lmac *lmac; 717 int i, err; 718 719 cgx->lmac_count = cgx_read(cgx, 0, CGXX_CMRX_RX_LMACS) & 0x7; 720 if (cgx->lmac_count > MAX_LMAC_PER_CGX) 721 cgx->lmac_count = MAX_LMAC_PER_CGX; 722 723 for (i = 0; i < cgx->lmac_count; i++) { 724 lmac = kcalloc(1, sizeof(struct lmac), GFP_KERNEL); 725 if (!lmac) 726 return -ENOMEM; 727 lmac->name = kcalloc(1, sizeof("cgx_fwi_xxx_yyy"), GFP_KERNEL); 728 if (!lmac->name) 729 return -ENOMEM; 730 sprintf(lmac->name, "cgx_fwi_%d_%d", cgx->cgx_id, i); 731 lmac->lmac_id = i; 732 lmac->cgx = cgx; 733 init_waitqueue_head(&lmac->wq_cmd_cmplt); 734 mutex_init(&lmac->cmd_lock); 735 spin_lock_init(&lmac->event_cb_lock); 736 err = request_irq(pci_irq_vector(cgx->pdev, 737 CGX_LMAC_FWI + i * 9), 738 cgx_fwi_event_handler, 0, lmac->name, lmac); 739 if (err) 740 return err; 741 742 /* Enable interrupt */ 743 cgx_write(cgx, lmac->lmac_id, CGXX_CMRX_INT_ENA_W1S, 744 FW_CGX_INT); 745 746 /* Add reference */ 747 cgx->lmac_idmap[i] = lmac; 748 } 749 750 return cgx_lmac_verify_fwi_version(cgx); 751 } 752 753 static int cgx_lmac_exit(struct cgx *cgx) 754 { 755 struct lmac *lmac; 756 int i; 757 758 if (cgx->cgx_cmd_workq) { 759 flush_workqueue(cgx->cgx_cmd_workq); 760 destroy_workqueue(cgx->cgx_cmd_workq); 761 cgx->cgx_cmd_workq = NULL; 762 } 763 764 /* Free all lmac related resources */ 765 for (i = 0; i < cgx->lmac_count; i++) { 766 lmac = cgx->lmac_idmap[i]; 767 if (!lmac) 768 continue; 769 free_irq(pci_irq_vector(cgx->pdev, CGX_LMAC_FWI + i * 9), lmac); 770 kfree(lmac->name); 771 kfree(lmac); 772 } 773 774 return 0; 775 } 776 777 static int cgx_probe(struct pci_dev *pdev, const struct pci_device_id *id) 778 { 779 struct device *dev = &pdev->dev; 780 struct cgx *cgx; 781 int err, nvec; 782 783 cgx = devm_kzalloc(dev, sizeof(*cgx), GFP_KERNEL); 784 if (!cgx) 785 return -ENOMEM; 786 cgx->pdev = pdev; 787 788 pci_set_drvdata(pdev, cgx); 789 790 err = pci_enable_device(pdev); 791 if (err) { 792 dev_err(dev, "Failed to enable PCI device\n"); 793 pci_set_drvdata(pdev, NULL); 794 return err; 795 } 796 797 err = pci_request_regions(pdev, DRV_NAME); 798 if (err) { 799 dev_err(dev, "PCI request regions failed 0x%x\n", err); 800 goto err_disable_device; 801 } 802 803 /* MAP configuration registers */ 804 cgx->reg_base = pcim_iomap(pdev, PCI_CFG_REG_BAR_NUM, 0); 805 if (!cgx->reg_base) { 806 dev_err(dev, "CGX: Cannot map CSR memory space, aborting\n"); 807 err = -ENOMEM; 808 goto err_release_regions; 809 } 810 811 nvec = CGX_NVEC; 812 err = pci_alloc_irq_vectors(pdev, nvec, nvec, PCI_IRQ_MSIX); 813 if (err < 0 || err != nvec) { 814 dev_err(dev, "Request for %d msix vectors failed, err %d\n", 815 nvec, err); 816 goto err_release_regions; 817 } 818 819 cgx->cgx_id = (pci_resource_start(pdev, PCI_CFG_REG_BAR_NUM) >> 24) 820 & CGX_ID_MASK; 821 822 /* init wq for processing linkup requests */ 823 INIT_WORK(&cgx->cgx_cmd_work, cgx_lmac_linkup_work); 824 cgx->cgx_cmd_workq = alloc_workqueue("cgx_cmd_workq", 0, 0); 825 if (!cgx->cgx_cmd_workq) { 826 dev_err(dev, "alloc workqueue failed for cgx cmd"); 827 err = -ENOMEM; 828 goto err_release_regions; 829 } 830 831 list_add(&cgx->cgx_list, &cgx_list); 832 833 cgx_link_usertable_init(); 834 835 err = cgx_lmac_init(cgx); 836 if (err) 837 goto err_release_lmac; 838 839 return 0; 840 841 err_release_lmac: 842 cgx_lmac_exit(cgx); 843 list_del(&cgx->cgx_list); 844 err_release_regions: 845 pci_release_regions(pdev); 846 err_disable_device: 847 pci_disable_device(pdev); 848 pci_set_drvdata(pdev, NULL); 849 return err; 850 } 851 852 static void cgx_remove(struct pci_dev *pdev) 853 { 854 struct cgx *cgx = pci_get_drvdata(pdev); 855 856 cgx_lmac_exit(cgx); 857 list_del(&cgx->cgx_list); 858 pci_free_irq_vectors(pdev); 859 pci_release_regions(pdev); 860 pci_disable_device(pdev); 861 pci_set_drvdata(pdev, NULL); 862 } 863 864 struct pci_driver cgx_driver = { 865 .name = DRV_NAME, 866 .id_table = cgx_id_table, 867 .probe = cgx_probe, 868 .remove = cgx_remove, 869 }; 870