1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Tehuti Networks(R) Network Driver 4 * ethtool interface implementation 5 * Copyright (C) 2007 Tehuti Networks Ltd. All rights reserved 6 */ 7 8 /* 9 * RX HW/SW interaction overview 10 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 11 * There are 2 types of RX communication channels between driver and NIC. 12 * 1) RX Free Fifo - RXF - holds descriptors of empty buffers to accept incoming 13 * traffic. This Fifo is filled by SW and is readen by HW. Each descriptor holds 14 * info about buffer's location, size and ID. An ID field is used to identify a 15 * buffer when it's returned with data via RXD Fifo (see below) 16 * 2) RX Data Fifo - RXD - holds descriptors of full buffers. This Fifo is 17 * filled by HW and is readen by SW. Each descriptor holds status and ID. 18 * HW pops descriptor from RXF Fifo, stores ID, fills buffer with incoming data, 19 * via dma moves it into host memory, builds new RXD descriptor with same ID, 20 * pushes it into RXD Fifo and raises interrupt to indicate new RX data. 21 * 22 * Current NIC configuration (registers + firmware) makes NIC use 2 RXF Fifos. 23 * One holds 1.5K packets and another - 26K packets. Depending on incoming 24 * packet size, HW desides on a RXF Fifo to pop buffer from. When packet is 25 * filled with data, HW builds new RXD descriptor for it and push it into single 26 * RXD Fifo. 27 * 28 * RX SW Data Structures 29 * ~~~~~~~~~~~~~~~~~~~~~ 30 * skb db - used to keep track of all skbs owned by SW and their dma addresses. 31 * For RX case, ownership lasts from allocating new empty skb for RXF until 32 * accepting full skb from RXD and passing it to OS. Each RXF Fifo has its own 33 * skb db. Implemented as array with bitmask. 34 * fifo - keeps info about fifo's size and location, relevant HW registers, 35 * usage and skb db. Each RXD and RXF Fifo has its own fifo structure. 36 * Implemented as simple struct. 37 * 38 * RX SW Execution Flow 39 * ~~~~~~~~~~~~~~~~~~~~ 40 * Upon initialization (ifconfig up) driver creates RX fifos and initializes 41 * relevant registers. At the end of init phase, driver enables interrupts. 42 * NIC sees that there is no RXF buffers and raises 43 * RD_INTR interrupt, isr fills skbs and Rx begins. 44 * Driver has two receive operation modes: 45 * NAPI - interrupt-driven mixed with polling 46 * interrupt-driven only 47 * 48 * Interrupt-driven only flow is following. When buffer is ready, HW raises 49 * interrupt and isr is called. isr collects all available packets 50 * (bdx_rx_receive), refills skbs (bdx_rx_alloc_skbs) and exit. 51 52 * Rx buffer allocation note 53 * ~~~~~~~~~~~~~~~~~~~~~~~~~ 54 * Driver cares to feed such amount of RxF descriptors that respective amount of 55 * RxD descriptors can not fill entire RxD fifo. The main reason is lack of 56 * overflow check in Bordeaux for RxD fifo free/used size. 57 * FIXME: this is NOT fully implemented, more work should be done 58 * 59 */ 60 61 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 62 63 #include "tehuti.h" 64 65 static const struct pci_device_id bdx_pci_tbl[] = { 66 { PCI_VDEVICE(TEHUTI, 0x3009), }, 67 { PCI_VDEVICE(TEHUTI, 0x3010), }, 68 { PCI_VDEVICE(TEHUTI, 0x3014), }, 69 { 0 } 70 }; 71 72 MODULE_DEVICE_TABLE(pci, bdx_pci_tbl); 73 74 /* Definitions needed by ISR or NAPI functions */ 75 static void bdx_rx_alloc_skbs(struct bdx_priv *priv, struct rxf_fifo *f); 76 static void bdx_tx_cleanup(struct bdx_priv *priv); 77 static int bdx_rx_receive(struct bdx_priv *priv, struct rxd_fifo *f, int budget); 78 79 /* Definitions needed by FW loading */ 80 static void bdx_tx_push_desc_safe(struct bdx_priv *priv, void *data, int size); 81 82 /* Definitions needed by hw_start */ 83 static int bdx_tx_init(struct bdx_priv *priv); 84 static int bdx_rx_init(struct bdx_priv *priv); 85 86 /* Definitions needed by bdx_close */ 87 static void bdx_rx_free(struct bdx_priv *priv); 88 static void bdx_tx_free(struct bdx_priv *priv); 89 90 /* Definitions needed by bdx_probe */ 91 static void bdx_set_ethtool_ops(struct net_device *netdev); 92 93 /************************************************************************* 94 * Print Info * 95 *************************************************************************/ 96 97 static void print_hw_id(struct pci_dev *pdev) 98 { 99 struct pci_nic *nic = pci_get_drvdata(pdev); 100 u16 pci_link_status = 0; 101 u16 pci_ctrl = 0; 102 103 pci_read_config_word(pdev, PCI_LINK_STATUS_REG, &pci_link_status); 104 pci_read_config_word(pdev, PCI_DEV_CTRL_REG, &pci_ctrl); 105 106 pr_info("%s%s\n", BDX_NIC_NAME, 107 nic->port_num == 1 ? "" : ", 2-Port"); 108 pr_info("srom 0x%x fpga %d build %u lane# %d max_pl 0x%x mrrs 0x%x\n", 109 readl(nic->regs + SROM_VER), readl(nic->regs + FPGA_VER) & 0xFFF, 110 readl(nic->regs + FPGA_SEED), 111 GET_LINK_STATUS_LANES(pci_link_status), 112 GET_DEV_CTRL_MAXPL(pci_ctrl), GET_DEV_CTRL_MRRS(pci_ctrl)); 113 } 114 115 static void print_fw_id(struct pci_nic *nic) 116 { 117 pr_info("fw 0x%x\n", readl(nic->regs + FW_VER)); 118 } 119 120 static void print_eth_id(struct net_device *ndev) 121 { 122 netdev_info(ndev, "%s, Port %c\n", 123 BDX_NIC_NAME, (ndev->if_port == 0) ? 'A' : 'B'); 124 125 } 126 127 /************************************************************************* 128 * Code * 129 *************************************************************************/ 130 131 #define bdx_enable_interrupts(priv) \ 132 do { WRITE_REG(priv, regIMR, IR_RUN); } while (0) 133 #define bdx_disable_interrupts(priv) \ 134 do { WRITE_REG(priv, regIMR, 0); } while (0) 135 136 /** 137 * bdx_fifo_init - create TX/RX descriptor fifo for host-NIC communication. 138 * @priv: NIC private structure 139 * @f: fifo to initialize 140 * @fsz_type: fifo size type: 0-4KB, 1-8KB, 2-16KB, 3-32KB 141 * @reg_CFG0: offsets of registers relative to base address 142 * @reg_CFG1: offsets of registers relative to base address 143 * @reg_RPTR: offsets of registers relative to base address 144 * @reg_WPTR: offsets of registers relative to base address 145 * 146 * 1K extra space is allocated at the end of the fifo to simplify 147 * processing of descriptors that wraps around fifo's end 148 * 149 * Returns 0 on success, negative value on failure 150 * 151 */ 152 static int 153 bdx_fifo_init(struct bdx_priv *priv, struct fifo *f, int fsz_type, 154 u16 reg_CFG0, u16 reg_CFG1, u16 reg_RPTR, u16 reg_WPTR) 155 { 156 u16 memsz = FIFO_SIZE * (1 << fsz_type); 157 158 memset(f, 0, sizeof(struct fifo)); 159 /* dma_alloc_coherent gives us 4k-aligned memory */ 160 f->va = dma_alloc_coherent(&priv->pdev->dev, memsz + FIFO_EXTRA_SPACE, 161 &f->da, GFP_ATOMIC); 162 if (!f->va) { 163 pr_err("dma_alloc_coherent failed\n"); 164 RET(-ENOMEM); 165 } 166 f->reg_CFG0 = reg_CFG0; 167 f->reg_CFG1 = reg_CFG1; 168 f->reg_RPTR = reg_RPTR; 169 f->reg_WPTR = reg_WPTR; 170 f->rptr = 0; 171 f->wptr = 0; 172 f->memsz = memsz; 173 f->size_mask = memsz - 1; 174 WRITE_REG(priv, reg_CFG0, (u32) ((f->da & TX_RX_CFG0_BASE) | fsz_type)); 175 WRITE_REG(priv, reg_CFG1, H32_64(f->da)); 176 177 RET(0); 178 } 179 180 /** 181 * bdx_fifo_free - free all resources used by fifo 182 * @priv: NIC private structure 183 * @f: fifo to release 184 */ 185 static void bdx_fifo_free(struct bdx_priv *priv, struct fifo *f) 186 { 187 ENTER; 188 if (f->va) { 189 dma_free_coherent(&priv->pdev->dev, 190 f->memsz + FIFO_EXTRA_SPACE, f->va, f->da); 191 f->va = NULL; 192 } 193 RET(); 194 } 195 196 /** 197 * bdx_link_changed - notifies OS about hw link state. 198 * @priv: hw adapter structure 199 */ 200 static void bdx_link_changed(struct bdx_priv *priv) 201 { 202 u32 link = READ_REG(priv, regMAC_LNK_STAT) & MAC_LINK_STAT; 203 204 if (!link) { 205 if (netif_carrier_ok(priv->ndev)) { 206 netif_stop_queue(priv->ndev); 207 netif_carrier_off(priv->ndev); 208 netdev_err(priv->ndev, "Link Down\n"); 209 } 210 } else { 211 if (!netif_carrier_ok(priv->ndev)) { 212 netif_wake_queue(priv->ndev); 213 netif_carrier_on(priv->ndev); 214 netdev_err(priv->ndev, "Link Up\n"); 215 } 216 } 217 } 218 219 static void bdx_isr_extra(struct bdx_priv *priv, u32 isr) 220 { 221 if (isr & IR_RX_FREE_0) { 222 bdx_rx_alloc_skbs(priv, &priv->rxf_fifo0); 223 DBG("RX_FREE_0\n"); 224 } 225 226 if (isr & IR_LNKCHG0) 227 bdx_link_changed(priv); 228 229 if (isr & IR_PCIE_LINK) 230 netdev_err(priv->ndev, "PCI-E Link Fault\n"); 231 232 if (isr & IR_PCIE_TOUT) 233 netdev_err(priv->ndev, "PCI-E Time Out\n"); 234 235 } 236 237 /** 238 * bdx_isr_napi - Interrupt Service Routine for Bordeaux NIC 239 * @irq: interrupt number 240 * @dev: network device 241 * 242 * Return IRQ_NONE if it was not our interrupt, IRQ_HANDLED - otherwise 243 * 244 * It reads ISR register to know interrupt reasons, and proceed them one by one. 245 * Reasons of interest are: 246 * RX_DESC - new packet has arrived and RXD fifo holds its descriptor 247 * RX_FREE - number of free Rx buffers in RXF fifo gets low 248 * TX_FREE - packet was transmited and RXF fifo holds its descriptor 249 */ 250 251 static irqreturn_t bdx_isr_napi(int irq, void *dev) 252 { 253 struct net_device *ndev = dev; 254 struct bdx_priv *priv = netdev_priv(ndev); 255 u32 isr; 256 257 ENTER; 258 isr = (READ_REG(priv, regISR) & IR_RUN); 259 if (unlikely(!isr)) { 260 bdx_enable_interrupts(priv); 261 return IRQ_NONE; /* Not our interrupt */ 262 } 263 264 if (isr & IR_EXTRA) 265 bdx_isr_extra(priv, isr); 266 267 if (isr & (IR_RX_DESC_0 | IR_TX_FREE_0)) { 268 if (likely(napi_schedule_prep(&priv->napi))) { 269 __napi_schedule(&priv->napi); 270 RET(IRQ_HANDLED); 271 } else { 272 /* NOTE: we get here if intr has slipped into window 273 * between these lines in bdx_poll: 274 * bdx_enable_interrupts(priv); 275 * return 0; 276 * currently intrs are disabled (since we read ISR), 277 * and we have failed to register next poll. 278 * so we read the regs to trigger chip 279 * and allow further interupts. */ 280 READ_REG(priv, regTXF_WPTR_0); 281 READ_REG(priv, regRXD_WPTR_0); 282 } 283 } 284 285 bdx_enable_interrupts(priv); 286 RET(IRQ_HANDLED); 287 } 288 289 static int bdx_poll(struct napi_struct *napi, int budget) 290 { 291 struct bdx_priv *priv = container_of(napi, struct bdx_priv, napi); 292 int work_done; 293 294 ENTER; 295 bdx_tx_cleanup(priv); 296 work_done = bdx_rx_receive(priv, &priv->rxd_fifo0, budget); 297 if ((work_done < budget) || 298 (priv->napi_stop++ >= 30)) { 299 DBG("rx poll is done. backing to isr-driven\n"); 300 301 /* from time to time we exit to let NAPI layer release 302 * device lock and allow waiting tasks (eg rmmod) to advance) */ 303 priv->napi_stop = 0; 304 305 napi_complete_done(napi, work_done); 306 bdx_enable_interrupts(priv); 307 } 308 return work_done; 309 } 310 311 /** 312 * bdx_fw_load - loads firmware to NIC 313 * @priv: NIC private structure 314 * 315 * Firmware is loaded via TXD fifo, so it must be initialized first. 316 * Firware must be loaded once per NIC not per PCI device provided by NIC (NIC 317 * can have few of them). So all drivers use semaphore register to choose one 318 * that will actually load FW to NIC. 319 */ 320 321 static int bdx_fw_load(struct bdx_priv *priv) 322 { 323 const struct firmware *fw = NULL; 324 int master, i; 325 int rc; 326 327 ENTER; 328 master = READ_REG(priv, regINIT_SEMAPHORE); 329 if (!READ_REG(priv, regINIT_STATUS) && master) { 330 rc = request_firmware(&fw, "tehuti/bdx.bin", &priv->pdev->dev); 331 if (rc) 332 goto out; 333 bdx_tx_push_desc_safe(priv, (char *)fw->data, fw->size); 334 mdelay(100); 335 } 336 for (i = 0; i < 200; i++) { 337 if (READ_REG(priv, regINIT_STATUS)) { 338 rc = 0; 339 goto out; 340 } 341 mdelay(2); 342 } 343 rc = -EIO; 344 out: 345 if (master) 346 WRITE_REG(priv, regINIT_SEMAPHORE, 1); 347 348 release_firmware(fw); 349 350 if (rc) { 351 netdev_err(priv->ndev, "firmware loading failed\n"); 352 if (rc == -EIO) 353 DBG("VPC = 0x%x VIC = 0x%x INIT_STATUS = 0x%x i=%d\n", 354 READ_REG(priv, regVPC), 355 READ_REG(priv, regVIC), 356 READ_REG(priv, regINIT_STATUS), i); 357 RET(rc); 358 } else { 359 DBG("%s: firmware loading success\n", priv->ndev->name); 360 RET(0); 361 } 362 } 363 364 static void bdx_restore_mac(struct net_device *ndev, struct bdx_priv *priv) 365 { 366 u32 val; 367 368 ENTER; 369 DBG("mac0=%x mac1=%x mac2=%x\n", 370 READ_REG(priv, regUNC_MAC0_A), 371 READ_REG(priv, regUNC_MAC1_A), READ_REG(priv, regUNC_MAC2_A)); 372 373 val = (ndev->dev_addr[0] << 8) | (ndev->dev_addr[1]); 374 WRITE_REG(priv, regUNC_MAC2_A, val); 375 val = (ndev->dev_addr[2] << 8) | (ndev->dev_addr[3]); 376 WRITE_REG(priv, regUNC_MAC1_A, val); 377 val = (ndev->dev_addr[4] << 8) | (ndev->dev_addr[5]); 378 WRITE_REG(priv, regUNC_MAC0_A, val); 379 380 DBG("mac0=%x mac1=%x mac2=%x\n", 381 READ_REG(priv, regUNC_MAC0_A), 382 READ_REG(priv, regUNC_MAC1_A), READ_REG(priv, regUNC_MAC2_A)); 383 RET(); 384 } 385 386 /** 387 * bdx_hw_start - inits registers and starts HW's Rx and Tx engines 388 * @priv: NIC private structure 389 */ 390 static int bdx_hw_start(struct bdx_priv *priv) 391 { 392 int rc = -EIO; 393 struct net_device *ndev = priv->ndev; 394 395 ENTER; 396 bdx_link_changed(priv); 397 398 /* 10G overall max length (vlan, eth&ip header, ip payload, crc) */ 399 WRITE_REG(priv, regFRM_LENGTH, 0X3FE0); 400 WRITE_REG(priv, regPAUSE_QUANT, 0x96); 401 WRITE_REG(priv, regRX_FIFO_SECTION, 0x800010); 402 WRITE_REG(priv, regTX_FIFO_SECTION, 0xE00010); 403 WRITE_REG(priv, regRX_FULLNESS, 0); 404 WRITE_REG(priv, regTX_FULLNESS, 0); 405 WRITE_REG(priv, regCTRLST, 406 regCTRLST_BASE | regCTRLST_RX_ENA | regCTRLST_TX_ENA); 407 408 WRITE_REG(priv, regVGLB, 0); 409 WRITE_REG(priv, regMAX_FRAME_A, 410 priv->rxf_fifo0.m.pktsz & MAX_FRAME_AB_VAL); 411 412 DBG("RDINTCM=%08x\n", priv->rdintcm); /*NOTE: test script uses this */ 413 WRITE_REG(priv, regRDINTCM0, priv->rdintcm); 414 WRITE_REG(priv, regRDINTCM2, 0); /*cpu_to_le32(rcm.val)); */ 415 416 DBG("TDINTCM=%08x\n", priv->tdintcm); /*NOTE: test script uses this */ 417 WRITE_REG(priv, regTDINTCM0, priv->tdintcm); /* old val = 0x300064 */ 418 419 /* Enable timer interrupt once in 2 secs. */ 420 /*WRITE_REG(priv, regGTMR0, ((GTMR_SEC * 2) & GTMR_DATA)); */ 421 bdx_restore_mac(priv->ndev, priv); 422 423 WRITE_REG(priv, regGMAC_RXF_A, GMAC_RX_FILTER_OSEN | 424 GMAC_RX_FILTER_AM | GMAC_RX_FILTER_AB); 425 426 #define BDX_IRQ_TYPE ((priv->nic->irq_type == IRQ_MSI) ? 0 : IRQF_SHARED) 427 428 rc = request_irq(priv->pdev->irq, bdx_isr_napi, BDX_IRQ_TYPE, 429 ndev->name, ndev); 430 if (rc) 431 goto err_irq; 432 bdx_enable_interrupts(priv); 433 434 RET(0); 435 436 err_irq: 437 RET(rc); 438 } 439 440 static void bdx_hw_stop(struct bdx_priv *priv) 441 { 442 ENTER; 443 bdx_disable_interrupts(priv); 444 free_irq(priv->pdev->irq, priv->ndev); 445 446 netif_carrier_off(priv->ndev); 447 netif_stop_queue(priv->ndev); 448 449 RET(); 450 } 451 452 static int bdx_hw_reset_direct(void __iomem *regs) 453 { 454 u32 val, i; 455 ENTER; 456 457 /* reset sequences: read, write 1, read, write 0 */ 458 val = readl(regs + regCLKPLL); 459 writel((val | CLKPLL_SFTRST) + 0x8, regs + regCLKPLL); 460 udelay(50); 461 val = readl(regs + regCLKPLL); 462 writel(val & ~CLKPLL_SFTRST, regs + regCLKPLL); 463 464 /* check that the PLLs are locked and reset ended */ 465 for (i = 0; i < 70; i++, mdelay(10)) 466 if ((readl(regs + regCLKPLL) & CLKPLL_LKD) == CLKPLL_LKD) { 467 /* do any PCI-E read transaction */ 468 readl(regs + regRXD_CFG0_0); 469 return 0; 470 } 471 pr_err("HW reset failed\n"); 472 return 1; /* failure */ 473 } 474 475 static int bdx_hw_reset(struct bdx_priv *priv) 476 { 477 u32 val, i; 478 ENTER; 479 480 if (priv->port == 0) { 481 /* reset sequences: read, write 1, read, write 0 */ 482 val = READ_REG(priv, regCLKPLL); 483 WRITE_REG(priv, regCLKPLL, (val | CLKPLL_SFTRST) + 0x8); 484 udelay(50); 485 val = READ_REG(priv, regCLKPLL); 486 WRITE_REG(priv, regCLKPLL, val & ~CLKPLL_SFTRST); 487 } 488 /* check that the PLLs are locked and reset ended */ 489 for (i = 0; i < 70; i++, mdelay(10)) 490 if ((READ_REG(priv, regCLKPLL) & CLKPLL_LKD) == CLKPLL_LKD) { 491 /* do any PCI-E read transaction */ 492 READ_REG(priv, regRXD_CFG0_0); 493 return 0; 494 } 495 pr_err("HW reset failed\n"); 496 return 1; /* failure */ 497 } 498 499 static int bdx_sw_reset(struct bdx_priv *priv) 500 { 501 int i; 502 503 ENTER; 504 /* 1. load MAC (obsolete) */ 505 /* 2. disable Rx (and Tx) */ 506 WRITE_REG(priv, regGMAC_RXF_A, 0); 507 mdelay(100); 508 /* 3. disable port */ 509 WRITE_REG(priv, regDIS_PORT, 1); 510 /* 4. disable queue */ 511 WRITE_REG(priv, regDIS_QU, 1); 512 /* 5. wait until hw is disabled */ 513 for (i = 0; i < 50; i++) { 514 if (READ_REG(priv, regRST_PORT) & 1) 515 break; 516 mdelay(10); 517 } 518 if (i == 50) 519 netdev_err(priv->ndev, "SW reset timeout. continuing anyway\n"); 520 521 /* 6. disable intrs */ 522 WRITE_REG(priv, regRDINTCM0, 0); 523 WRITE_REG(priv, regTDINTCM0, 0); 524 WRITE_REG(priv, regIMR, 0); 525 READ_REG(priv, regISR); 526 527 /* 7. reset queue */ 528 WRITE_REG(priv, regRST_QU, 1); 529 /* 8. reset port */ 530 WRITE_REG(priv, regRST_PORT, 1); 531 /* 9. zero all read and write pointers */ 532 for (i = regTXD_WPTR_0; i <= regTXF_RPTR_3; i += 0x10) 533 DBG("%x = %x\n", i, READ_REG(priv, i) & TXF_WPTR_WR_PTR); 534 for (i = regTXD_WPTR_0; i <= regTXF_RPTR_3; i += 0x10) 535 WRITE_REG(priv, i, 0); 536 /* 10. unseet port disable */ 537 WRITE_REG(priv, regDIS_PORT, 0); 538 /* 11. unset queue disable */ 539 WRITE_REG(priv, regDIS_QU, 0); 540 /* 12. unset queue reset */ 541 WRITE_REG(priv, regRST_QU, 0); 542 /* 13. unset port reset */ 543 WRITE_REG(priv, regRST_PORT, 0); 544 /* 14. enable Rx */ 545 /* skiped. will be done later */ 546 /* 15. save MAC (obsolete) */ 547 for (i = regTXD_WPTR_0; i <= regTXF_RPTR_3; i += 0x10) 548 DBG("%x = %x\n", i, READ_REG(priv, i) & TXF_WPTR_WR_PTR); 549 550 RET(0); 551 } 552 553 /* bdx_reset - performs right type of reset depending on hw type */ 554 static int bdx_reset(struct bdx_priv *priv) 555 { 556 ENTER; 557 RET((priv->pdev->device == 0x3009) 558 ? bdx_hw_reset(priv) 559 : bdx_sw_reset(priv)); 560 } 561 562 /** 563 * bdx_close - Disables a network interface 564 * @ndev: network interface device structure 565 * 566 * Returns 0, this is not allowed to fail 567 * 568 * The close entry point is called when an interface is de-activated 569 * by the OS. The hardware is still under the drivers control, but 570 * needs to be disabled. A global MAC reset is issued to stop the 571 * hardware, and all transmit and receive resources are freed. 572 **/ 573 static int bdx_close(struct net_device *ndev) 574 { 575 struct bdx_priv *priv = NULL; 576 577 ENTER; 578 priv = netdev_priv(ndev); 579 580 napi_disable(&priv->napi); 581 582 bdx_reset(priv); 583 bdx_hw_stop(priv); 584 bdx_rx_free(priv); 585 bdx_tx_free(priv); 586 RET(0); 587 } 588 589 /** 590 * bdx_open - Called when a network interface is made active 591 * @ndev: network interface device structure 592 * 593 * Returns 0 on success, negative value on failure 594 * 595 * The open entry point is called when a network interface is made 596 * active by the system (IFF_UP). At this point all resources needed 597 * for transmit and receive operations are allocated, the interrupt 598 * handler is registered with the OS, the watchdog timer is started, 599 * and the stack is notified that the interface is ready. 600 **/ 601 static int bdx_open(struct net_device *ndev) 602 { 603 struct bdx_priv *priv; 604 int rc; 605 606 ENTER; 607 priv = netdev_priv(ndev); 608 bdx_reset(priv); 609 if (netif_running(ndev)) 610 netif_stop_queue(priv->ndev); 611 612 if ((rc = bdx_tx_init(priv)) || 613 (rc = bdx_rx_init(priv)) || 614 (rc = bdx_fw_load(priv))) 615 goto err; 616 617 bdx_rx_alloc_skbs(priv, &priv->rxf_fifo0); 618 619 rc = bdx_hw_start(priv); 620 if (rc) 621 goto err; 622 623 napi_enable(&priv->napi); 624 625 print_fw_id(priv->nic); 626 627 RET(0); 628 629 err: 630 bdx_close(ndev); 631 RET(rc); 632 } 633 634 static int bdx_range_check(struct bdx_priv *priv, u32 offset) 635 { 636 return (offset > (u32) (BDX_REGS_SIZE / priv->nic->port_num)) ? 637 -EINVAL : 0; 638 } 639 640 static int bdx_ioctl_priv(struct net_device *ndev, struct ifreq *ifr, int cmd) 641 { 642 struct bdx_priv *priv = netdev_priv(ndev); 643 u32 data[3]; 644 int error; 645 646 ENTER; 647 648 DBG("jiffies=%ld cmd=%d\n", jiffies, cmd); 649 if (cmd != SIOCDEVPRIVATE) { 650 error = copy_from_user(data, ifr->ifr_data, sizeof(data)); 651 if (error) { 652 pr_err("can't copy from user\n"); 653 RET(-EFAULT); 654 } 655 DBG("%d 0x%x 0x%x\n", data[0], data[1], data[2]); 656 } else { 657 return -EOPNOTSUPP; 658 } 659 660 if (!capable(CAP_SYS_RAWIO)) 661 return -EPERM; 662 663 switch (data[0]) { 664 665 case BDX_OP_READ: 666 error = bdx_range_check(priv, data[1]); 667 if (error < 0) 668 return error; 669 data[2] = READ_REG(priv, data[1]); 670 DBG("read_reg(0x%x)=0x%x (dec %d)\n", data[1], data[2], 671 data[2]); 672 error = copy_to_user(ifr->ifr_data, data, sizeof(data)); 673 if (error) 674 RET(-EFAULT); 675 break; 676 677 case BDX_OP_WRITE: 678 error = bdx_range_check(priv, data[1]); 679 if (error < 0) 680 return error; 681 WRITE_REG(priv, data[1], data[2]); 682 DBG("write_reg(0x%x, 0x%x)\n", data[1], data[2]); 683 break; 684 685 default: 686 RET(-EOPNOTSUPP); 687 } 688 return 0; 689 } 690 691 static int bdx_ioctl(struct net_device *ndev, struct ifreq *ifr, int cmd) 692 { 693 ENTER; 694 if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) 695 RET(bdx_ioctl_priv(ndev, ifr, cmd)); 696 else 697 RET(-EOPNOTSUPP); 698 } 699 700 /** 701 * __bdx_vlan_rx_vid - private helper for adding/killing VLAN vid 702 * @ndev: network device 703 * @vid: VLAN vid 704 * @enable: enable or disable vlan 705 * 706 * Passes VLAN filter table to hardware 707 */ 708 static void __bdx_vlan_rx_vid(struct net_device *ndev, uint16_t vid, int enable) 709 { 710 struct bdx_priv *priv = netdev_priv(ndev); 711 u32 reg, bit, val; 712 713 ENTER; 714 DBG2("vid=%d value=%d\n", (int)vid, enable); 715 if (unlikely(vid >= 4096)) { 716 pr_err("invalid VID: %u (> 4096)\n", vid); 717 RET(); 718 } 719 reg = regVLAN_0 + (vid / 32) * 4; 720 bit = 1 << vid % 32; 721 val = READ_REG(priv, reg); 722 DBG2("reg=%x, val=%x, bit=%d\n", reg, val, bit); 723 if (enable) 724 val |= bit; 725 else 726 val &= ~bit; 727 DBG2("new val %x\n", val); 728 WRITE_REG(priv, reg, val); 729 RET(); 730 } 731 732 /** 733 * bdx_vlan_rx_add_vid - kernel hook for adding VLAN vid to hw filtering table 734 * @ndev: network device 735 * @proto: unused 736 * @vid: VLAN vid to add 737 */ 738 static int bdx_vlan_rx_add_vid(struct net_device *ndev, __be16 proto, u16 vid) 739 { 740 __bdx_vlan_rx_vid(ndev, vid, 1); 741 return 0; 742 } 743 744 /** 745 * bdx_vlan_rx_kill_vid - kernel hook for killing VLAN vid in hw filtering table 746 * @ndev: network device 747 * @proto: unused 748 * @vid: VLAN vid to kill 749 */ 750 static int bdx_vlan_rx_kill_vid(struct net_device *ndev, __be16 proto, u16 vid) 751 { 752 __bdx_vlan_rx_vid(ndev, vid, 0); 753 return 0; 754 } 755 756 /** 757 * bdx_change_mtu - Change the Maximum Transfer Unit 758 * @ndev: network interface device structure 759 * @new_mtu: new value for maximum frame size 760 * 761 * Returns 0 on success, negative on failure 762 */ 763 static int bdx_change_mtu(struct net_device *ndev, int new_mtu) 764 { 765 ENTER; 766 767 ndev->mtu = new_mtu; 768 if (netif_running(ndev)) { 769 bdx_close(ndev); 770 bdx_open(ndev); 771 } 772 RET(0); 773 } 774 775 static void bdx_setmulti(struct net_device *ndev) 776 { 777 struct bdx_priv *priv = netdev_priv(ndev); 778 779 u32 rxf_val = 780 GMAC_RX_FILTER_AM | GMAC_RX_FILTER_AB | GMAC_RX_FILTER_OSEN; 781 int i; 782 783 ENTER; 784 /* IMF - imperfect (hash) rx multicat filter */ 785 /* PMF - perfect rx multicat filter */ 786 787 /* FIXME: RXE(OFF) */ 788 if (ndev->flags & IFF_PROMISC) { 789 rxf_val |= GMAC_RX_FILTER_PRM; 790 } else if (ndev->flags & IFF_ALLMULTI) { 791 /* set IMF to accept all multicast frmaes */ 792 for (i = 0; i < MAC_MCST_HASH_NUM; i++) 793 WRITE_REG(priv, regRX_MCST_HASH0 + i * 4, ~0); 794 } else if (!netdev_mc_empty(ndev)) { 795 u8 hash; 796 struct netdev_hw_addr *ha; 797 u32 reg, val; 798 799 /* set IMF to deny all multicast frames */ 800 for (i = 0; i < MAC_MCST_HASH_NUM; i++) 801 WRITE_REG(priv, regRX_MCST_HASH0 + i * 4, 0); 802 /* set PMF to deny all multicast frames */ 803 for (i = 0; i < MAC_MCST_NUM; i++) { 804 WRITE_REG(priv, regRX_MAC_MCST0 + i * 8, 0); 805 WRITE_REG(priv, regRX_MAC_MCST1 + i * 8, 0); 806 } 807 808 /* use PMF to accept first MAC_MCST_NUM (15) addresses */ 809 /* TBD: sort addresses and write them in ascending order 810 * into RX_MAC_MCST regs. we skip this phase now and accept ALL 811 * multicast frames throu IMF */ 812 /* accept the rest of addresses throu IMF */ 813 netdev_for_each_mc_addr(ha, ndev) { 814 hash = 0; 815 for (i = 0; i < ETH_ALEN; i++) 816 hash ^= ha->addr[i]; 817 reg = regRX_MCST_HASH0 + ((hash >> 5) << 2); 818 val = READ_REG(priv, reg); 819 val |= (1 << (hash % 32)); 820 WRITE_REG(priv, reg, val); 821 } 822 823 } else { 824 DBG("only own mac %d\n", netdev_mc_count(ndev)); 825 rxf_val |= GMAC_RX_FILTER_AB; 826 } 827 WRITE_REG(priv, regGMAC_RXF_A, rxf_val); 828 /* enable RX */ 829 /* FIXME: RXE(ON) */ 830 RET(); 831 } 832 833 static int bdx_set_mac(struct net_device *ndev, void *p) 834 { 835 struct bdx_priv *priv = netdev_priv(ndev); 836 struct sockaddr *addr = p; 837 838 ENTER; 839 /* 840 if (netif_running(dev)) 841 return -EBUSY 842 */ 843 memcpy(ndev->dev_addr, addr->sa_data, ndev->addr_len); 844 bdx_restore_mac(ndev, priv); 845 RET(0); 846 } 847 848 static int bdx_read_mac(struct bdx_priv *priv) 849 { 850 u16 macAddress[3], i; 851 ENTER; 852 853 macAddress[2] = READ_REG(priv, regUNC_MAC0_A); 854 macAddress[2] = READ_REG(priv, regUNC_MAC0_A); 855 macAddress[1] = READ_REG(priv, regUNC_MAC1_A); 856 macAddress[1] = READ_REG(priv, regUNC_MAC1_A); 857 macAddress[0] = READ_REG(priv, regUNC_MAC2_A); 858 macAddress[0] = READ_REG(priv, regUNC_MAC2_A); 859 for (i = 0; i < 3; i++) { 860 priv->ndev->dev_addr[i * 2 + 1] = macAddress[i]; 861 priv->ndev->dev_addr[i * 2] = macAddress[i] >> 8; 862 } 863 RET(0); 864 } 865 866 static u64 bdx_read_l2stat(struct bdx_priv *priv, int reg) 867 { 868 u64 val; 869 870 val = READ_REG(priv, reg); 871 val |= ((u64) READ_REG(priv, reg + 8)) << 32; 872 return val; 873 } 874 875 /*Do the statistics-update work*/ 876 static void bdx_update_stats(struct bdx_priv *priv) 877 { 878 struct bdx_stats *stats = &priv->hw_stats; 879 u64 *stats_vector = (u64 *) stats; 880 int i; 881 int addr; 882 883 /*Fill HW structure */ 884 addr = 0x7200; 885 /*First 12 statistics - 0x7200 - 0x72B0 */ 886 for (i = 0; i < 12; i++) { 887 stats_vector[i] = bdx_read_l2stat(priv, addr); 888 addr += 0x10; 889 } 890 BDX_ASSERT(addr != 0x72C0); 891 /* 0x72C0-0x72E0 RSRV */ 892 addr = 0x72F0; 893 for (; i < 16; i++) { 894 stats_vector[i] = bdx_read_l2stat(priv, addr); 895 addr += 0x10; 896 } 897 BDX_ASSERT(addr != 0x7330); 898 /* 0x7330-0x7360 RSRV */ 899 addr = 0x7370; 900 for (; i < 19; i++) { 901 stats_vector[i] = bdx_read_l2stat(priv, addr); 902 addr += 0x10; 903 } 904 BDX_ASSERT(addr != 0x73A0); 905 /* 0x73A0-0x73B0 RSRV */ 906 addr = 0x73C0; 907 for (; i < 23; i++) { 908 stats_vector[i] = bdx_read_l2stat(priv, addr); 909 addr += 0x10; 910 } 911 BDX_ASSERT(addr != 0x7400); 912 BDX_ASSERT((sizeof(struct bdx_stats) / sizeof(u64)) != i); 913 } 914 915 static void print_rxdd(struct rxd_desc *rxdd, u32 rxd_val1, u16 len, 916 u16 rxd_vlan); 917 static void print_rxfd(struct rxf_desc *rxfd); 918 919 /************************************************************************* 920 * Rx DB * 921 *************************************************************************/ 922 923 static void bdx_rxdb_destroy(struct rxdb *db) 924 { 925 vfree(db); 926 } 927 928 static struct rxdb *bdx_rxdb_create(int nelem) 929 { 930 struct rxdb *db; 931 int i; 932 933 db = vmalloc(sizeof(struct rxdb) 934 + (nelem * sizeof(int)) 935 + (nelem * sizeof(struct rx_map))); 936 if (likely(db != NULL)) { 937 db->stack = (int *)(db + 1); 938 db->elems = (void *)(db->stack + nelem); 939 db->nelem = nelem; 940 db->top = nelem; 941 for (i = 0; i < nelem; i++) 942 db->stack[i] = nelem - i - 1; /* to make first allocs 943 close to db struct*/ 944 } 945 946 return db; 947 } 948 949 static inline int bdx_rxdb_alloc_elem(struct rxdb *db) 950 { 951 BDX_ASSERT(db->top <= 0); 952 return db->stack[--(db->top)]; 953 } 954 955 static inline void *bdx_rxdb_addr_elem(struct rxdb *db, int n) 956 { 957 BDX_ASSERT((n < 0) || (n >= db->nelem)); 958 return db->elems + n; 959 } 960 961 static inline int bdx_rxdb_available(struct rxdb *db) 962 { 963 return db->top; 964 } 965 966 static inline void bdx_rxdb_free_elem(struct rxdb *db, int n) 967 { 968 BDX_ASSERT((n >= db->nelem) || (n < 0)); 969 db->stack[(db->top)++] = n; 970 } 971 972 /************************************************************************* 973 * Rx Init * 974 *************************************************************************/ 975 976 /** 977 * bdx_rx_init - initialize RX all related HW and SW resources 978 * @priv: NIC private structure 979 * 980 * Returns 0 on success, negative value on failure 981 * 982 * It creates rxf and rxd fifos, update relevant HW registers, preallocate 983 * skb for rx. It assumes that Rx is desabled in HW 984 * funcs are grouped for better cache usage 985 * 986 * RxD fifo is smaller than RxF fifo by design. Upon high load, RxD will be 987 * filled and packets will be dropped by nic without getting into host or 988 * cousing interrupt. Anyway, in that condition, host has no chance to process 989 * all packets, but dropping in nic is cheaper, since it takes 0 cpu cycles 990 */ 991 992 /* TBD: ensure proper packet size */ 993 994 static int bdx_rx_init(struct bdx_priv *priv) 995 { 996 ENTER; 997 998 if (bdx_fifo_init(priv, &priv->rxd_fifo0.m, priv->rxd_size, 999 regRXD_CFG0_0, regRXD_CFG1_0, 1000 regRXD_RPTR_0, regRXD_WPTR_0)) 1001 goto err_mem; 1002 if (bdx_fifo_init(priv, &priv->rxf_fifo0.m, priv->rxf_size, 1003 regRXF_CFG0_0, regRXF_CFG1_0, 1004 regRXF_RPTR_0, regRXF_WPTR_0)) 1005 goto err_mem; 1006 priv->rxdb = bdx_rxdb_create(priv->rxf_fifo0.m.memsz / 1007 sizeof(struct rxf_desc)); 1008 if (!priv->rxdb) 1009 goto err_mem; 1010 1011 priv->rxf_fifo0.m.pktsz = priv->ndev->mtu + VLAN_ETH_HLEN; 1012 return 0; 1013 1014 err_mem: 1015 netdev_err(priv->ndev, "Rx init failed\n"); 1016 return -ENOMEM; 1017 } 1018 1019 /** 1020 * bdx_rx_free_skbs - frees and unmaps all skbs allocated for the fifo 1021 * @priv: NIC private structure 1022 * @f: RXF fifo 1023 */ 1024 static void bdx_rx_free_skbs(struct bdx_priv *priv, struct rxf_fifo *f) 1025 { 1026 struct rx_map *dm; 1027 struct rxdb *db = priv->rxdb; 1028 u16 i; 1029 1030 ENTER; 1031 DBG("total=%d free=%d busy=%d\n", db->nelem, bdx_rxdb_available(db), 1032 db->nelem - bdx_rxdb_available(db)); 1033 while (bdx_rxdb_available(db) > 0) { 1034 i = bdx_rxdb_alloc_elem(db); 1035 dm = bdx_rxdb_addr_elem(db, i); 1036 dm->dma = 0; 1037 } 1038 for (i = 0; i < db->nelem; i++) { 1039 dm = bdx_rxdb_addr_elem(db, i); 1040 if (dm->dma) { 1041 dma_unmap_single(&priv->pdev->dev, dm->dma, 1042 f->m.pktsz, DMA_FROM_DEVICE); 1043 dev_kfree_skb(dm->skb); 1044 } 1045 } 1046 } 1047 1048 /** 1049 * bdx_rx_free - release all Rx resources 1050 * @priv: NIC private structure 1051 * 1052 * It assumes that Rx is desabled in HW 1053 */ 1054 static void bdx_rx_free(struct bdx_priv *priv) 1055 { 1056 ENTER; 1057 if (priv->rxdb) { 1058 bdx_rx_free_skbs(priv, &priv->rxf_fifo0); 1059 bdx_rxdb_destroy(priv->rxdb); 1060 priv->rxdb = NULL; 1061 } 1062 bdx_fifo_free(priv, &priv->rxf_fifo0.m); 1063 bdx_fifo_free(priv, &priv->rxd_fifo0.m); 1064 1065 RET(); 1066 } 1067 1068 /************************************************************************* 1069 * Rx Engine * 1070 *************************************************************************/ 1071 1072 /** 1073 * bdx_rx_alloc_skbs - fill rxf fifo with new skbs 1074 * @priv: nic's private structure 1075 * @f: RXF fifo that needs skbs 1076 * 1077 * It allocates skbs, build rxf descs and push it (rxf descr) into rxf fifo. 1078 * skb's virtual and physical addresses are stored in skb db. 1079 * To calculate free space, func uses cached values of RPTR and WPTR 1080 * When needed, it also updates RPTR and WPTR. 1081 */ 1082 1083 /* TBD: do not update WPTR if no desc were written */ 1084 1085 static void bdx_rx_alloc_skbs(struct bdx_priv *priv, struct rxf_fifo *f) 1086 { 1087 struct sk_buff *skb; 1088 struct rxf_desc *rxfd; 1089 struct rx_map *dm; 1090 int dno, delta, idx; 1091 struct rxdb *db = priv->rxdb; 1092 1093 ENTER; 1094 dno = bdx_rxdb_available(db) - 1; 1095 while (dno > 0) { 1096 skb = netdev_alloc_skb(priv->ndev, f->m.pktsz + NET_IP_ALIGN); 1097 if (!skb) 1098 break; 1099 1100 skb_reserve(skb, NET_IP_ALIGN); 1101 1102 idx = bdx_rxdb_alloc_elem(db); 1103 dm = bdx_rxdb_addr_elem(db, idx); 1104 dm->dma = dma_map_single(&priv->pdev->dev, skb->data, 1105 f->m.pktsz, DMA_FROM_DEVICE); 1106 dm->skb = skb; 1107 rxfd = (struct rxf_desc *)(f->m.va + f->m.wptr); 1108 rxfd->info = CPU_CHIP_SWAP32(0x10003); /* INFO=1 BC=3 */ 1109 rxfd->va_lo = idx; 1110 rxfd->pa_lo = CPU_CHIP_SWAP32(L32_64(dm->dma)); 1111 rxfd->pa_hi = CPU_CHIP_SWAP32(H32_64(dm->dma)); 1112 rxfd->len = CPU_CHIP_SWAP32(f->m.pktsz); 1113 print_rxfd(rxfd); 1114 1115 f->m.wptr += sizeof(struct rxf_desc); 1116 delta = f->m.wptr - f->m.memsz; 1117 if (unlikely(delta >= 0)) { 1118 f->m.wptr = delta; 1119 if (delta > 0) { 1120 memcpy(f->m.va, f->m.va + f->m.memsz, delta); 1121 DBG("wrapped descriptor\n"); 1122 } 1123 } 1124 dno--; 1125 } 1126 /*TBD: to do - delayed rxf wptr like in txd */ 1127 WRITE_REG(priv, f->m.reg_WPTR, f->m.wptr & TXF_WPTR_WR_PTR); 1128 RET(); 1129 } 1130 1131 static inline void 1132 NETIF_RX_MUX(struct bdx_priv *priv, u32 rxd_val1, u16 rxd_vlan, 1133 struct sk_buff *skb) 1134 { 1135 ENTER; 1136 DBG("rxdd->flags.bits.vtag=%d\n", GET_RXD_VTAG(rxd_val1)); 1137 if (GET_RXD_VTAG(rxd_val1)) { 1138 DBG("%s: vlan rcv vlan '%x' vtag '%x'\n", 1139 priv->ndev->name, 1140 GET_RXD_VLAN_ID(rxd_vlan), 1141 GET_RXD_VTAG(rxd_val1)); 1142 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), GET_RXD_VLAN_TCI(rxd_vlan)); 1143 } 1144 netif_receive_skb(skb); 1145 } 1146 1147 static void bdx_recycle_skb(struct bdx_priv *priv, struct rxd_desc *rxdd) 1148 { 1149 struct rxf_desc *rxfd; 1150 struct rx_map *dm; 1151 struct rxf_fifo *f; 1152 struct rxdb *db; 1153 int delta; 1154 1155 ENTER; 1156 DBG("priv=%p rxdd=%p\n", priv, rxdd); 1157 f = &priv->rxf_fifo0; 1158 db = priv->rxdb; 1159 DBG("db=%p f=%p\n", db, f); 1160 dm = bdx_rxdb_addr_elem(db, rxdd->va_lo); 1161 DBG("dm=%p\n", dm); 1162 rxfd = (struct rxf_desc *)(f->m.va + f->m.wptr); 1163 rxfd->info = CPU_CHIP_SWAP32(0x10003); /* INFO=1 BC=3 */ 1164 rxfd->va_lo = rxdd->va_lo; 1165 rxfd->pa_lo = CPU_CHIP_SWAP32(L32_64(dm->dma)); 1166 rxfd->pa_hi = CPU_CHIP_SWAP32(H32_64(dm->dma)); 1167 rxfd->len = CPU_CHIP_SWAP32(f->m.pktsz); 1168 print_rxfd(rxfd); 1169 1170 f->m.wptr += sizeof(struct rxf_desc); 1171 delta = f->m.wptr - f->m.memsz; 1172 if (unlikely(delta >= 0)) { 1173 f->m.wptr = delta; 1174 if (delta > 0) { 1175 memcpy(f->m.va, f->m.va + f->m.memsz, delta); 1176 DBG("wrapped descriptor\n"); 1177 } 1178 } 1179 RET(); 1180 } 1181 1182 /** 1183 * bdx_rx_receive - receives full packets from RXD fifo and pass them to OS 1184 * NOTE: a special treatment is given to non-continuous descriptors 1185 * that start near the end, wraps around and continue at the beginning. a second 1186 * part is copied right after the first, and then descriptor is interpreted as 1187 * normal. fifo has an extra space to allow such operations 1188 * @priv: nic's private structure 1189 * @f: RXF fifo that needs skbs 1190 * @budget: maximum number of packets to receive 1191 */ 1192 1193 /* TBD: replace memcpy func call by explicite inline asm */ 1194 1195 static int bdx_rx_receive(struct bdx_priv *priv, struct rxd_fifo *f, int budget) 1196 { 1197 struct net_device *ndev = priv->ndev; 1198 struct sk_buff *skb, *skb2; 1199 struct rxd_desc *rxdd; 1200 struct rx_map *dm; 1201 struct rxf_fifo *rxf_fifo; 1202 int tmp_len, size; 1203 int done = 0; 1204 int max_done = BDX_MAX_RX_DONE; 1205 struct rxdb *db = NULL; 1206 /* Unmarshalled descriptor - copy of descriptor in host order */ 1207 u32 rxd_val1; 1208 u16 len; 1209 u16 rxd_vlan; 1210 1211 ENTER; 1212 max_done = budget; 1213 1214 f->m.wptr = READ_REG(priv, f->m.reg_WPTR) & TXF_WPTR_WR_PTR; 1215 1216 size = f->m.wptr - f->m.rptr; 1217 if (size < 0) 1218 size = f->m.memsz + size; /* size is negative :-) */ 1219 1220 while (size > 0) { 1221 1222 rxdd = (struct rxd_desc *)(f->m.va + f->m.rptr); 1223 rxd_val1 = CPU_CHIP_SWAP32(rxdd->rxd_val1); 1224 1225 len = CPU_CHIP_SWAP16(rxdd->len); 1226 1227 rxd_vlan = CPU_CHIP_SWAP16(rxdd->rxd_vlan); 1228 1229 print_rxdd(rxdd, rxd_val1, len, rxd_vlan); 1230 1231 tmp_len = GET_RXD_BC(rxd_val1) << 3; 1232 BDX_ASSERT(tmp_len <= 0); 1233 size -= tmp_len; 1234 if (size < 0) /* test for partially arrived descriptor */ 1235 break; 1236 1237 f->m.rptr += tmp_len; 1238 1239 tmp_len = f->m.rptr - f->m.memsz; 1240 if (unlikely(tmp_len >= 0)) { 1241 f->m.rptr = tmp_len; 1242 if (tmp_len > 0) { 1243 DBG("wrapped desc rptr=%d tmp_len=%d\n", 1244 f->m.rptr, tmp_len); 1245 memcpy(f->m.va + f->m.memsz, f->m.va, tmp_len); 1246 } 1247 } 1248 1249 if (unlikely(GET_RXD_ERR(rxd_val1))) { 1250 DBG("rxd_err = 0x%x\n", GET_RXD_ERR(rxd_val1)); 1251 ndev->stats.rx_errors++; 1252 bdx_recycle_skb(priv, rxdd); 1253 continue; 1254 } 1255 1256 rxf_fifo = &priv->rxf_fifo0; 1257 db = priv->rxdb; 1258 dm = bdx_rxdb_addr_elem(db, rxdd->va_lo); 1259 skb = dm->skb; 1260 1261 if (len < BDX_COPYBREAK && 1262 (skb2 = netdev_alloc_skb(priv->ndev, len + NET_IP_ALIGN))) { 1263 skb_reserve(skb2, NET_IP_ALIGN); 1264 /*skb_put(skb2, len); */ 1265 dma_sync_single_for_cpu(&priv->pdev->dev, dm->dma, 1266 rxf_fifo->m.pktsz, 1267 DMA_FROM_DEVICE); 1268 memcpy(skb2->data, skb->data, len); 1269 bdx_recycle_skb(priv, rxdd); 1270 skb = skb2; 1271 } else { 1272 dma_unmap_single(&priv->pdev->dev, dm->dma, 1273 rxf_fifo->m.pktsz, DMA_FROM_DEVICE); 1274 bdx_rxdb_free_elem(db, rxdd->va_lo); 1275 } 1276 1277 ndev->stats.rx_bytes += len; 1278 1279 skb_put(skb, len); 1280 skb->protocol = eth_type_trans(skb, ndev); 1281 1282 /* Non-IP packets aren't checksum-offloaded */ 1283 if (GET_RXD_PKT_ID(rxd_val1) == 0) 1284 skb_checksum_none_assert(skb); 1285 else 1286 skb->ip_summed = CHECKSUM_UNNECESSARY; 1287 1288 NETIF_RX_MUX(priv, rxd_val1, rxd_vlan, skb); 1289 1290 if (++done >= max_done) 1291 break; 1292 } 1293 1294 ndev->stats.rx_packets += done; 1295 1296 /* FIXME: do smth to minimize pci accesses */ 1297 WRITE_REG(priv, f->m.reg_RPTR, f->m.rptr & TXF_WPTR_WR_PTR); 1298 1299 bdx_rx_alloc_skbs(priv, &priv->rxf_fifo0); 1300 1301 RET(done); 1302 } 1303 1304 /************************************************************************* 1305 * Debug / Temprorary Code * 1306 *************************************************************************/ 1307 static void print_rxdd(struct rxd_desc *rxdd, u32 rxd_val1, u16 len, 1308 u16 rxd_vlan) 1309 { 1310 DBG("ERROR: rxdd bc %d rxfq %d to %d type %d err %d rxp %d pkt_id %d vtag %d len %d vlan_id %d cfi %d prio %d va_lo %d va_hi %d\n", 1311 GET_RXD_BC(rxd_val1), GET_RXD_RXFQ(rxd_val1), GET_RXD_TO(rxd_val1), 1312 GET_RXD_TYPE(rxd_val1), GET_RXD_ERR(rxd_val1), 1313 GET_RXD_RXP(rxd_val1), GET_RXD_PKT_ID(rxd_val1), 1314 GET_RXD_VTAG(rxd_val1), len, GET_RXD_VLAN_ID(rxd_vlan), 1315 GET_RXD_CFI(rxd_vlan), GET_RXD_PRIO(rxd_vlan), rxdd->va_lo, 1316 rxdd->va_hi); 1317 } 1318 1319 static void print_rxfd(struct rxf_desc *rxfd) 1320 { 1321 DBG("=== RxF desc CHIP ORDER/ENDIANNESS =============\n" 1322 "info 0x%x va_lo %u pa_lo 0x%x pa_hi 0x%x len 0x%x\n", 1323 rxfd->info, rxfd->va_lo, rxfd->pa_lo, rxfd->pa_hi, rxfd->len); 1324 } 1325 1326 /* 1327 * TX HW/SW interaction overview 1328 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1329 * There are 2 types of TX communication channels between driver and NIC. 1330 * 1) TX Free Fifo - TXF - holds ack descriptors for sent packets 1331 * 2) TX Data Fifo - TXD - holds descriptors of full buffers. 1332 * 1333 * Currently NIC supports TSO, checksuming and gather DMA 1334 * UFO and IP fragmentation is on the way 1335 * 1336 * RX SW Data Structures 1337 * ~~~~~~~~~~~~~~~~~~~~~ 1338 * txdb - used to keep track of all skbs owned by SW and their dma addresses. 1339 * For TX case, ownership lasts from geting packet via hard_xmit and until HW 1340 * acknowledges sent by TXF descriptors. 1341 * Implemented as cyclic buffer. 1342 * fifo - keeps info about fifo's size and location, relevant HW registers, 1343 * usage and skb db. Each RXD and RXF Fifo has its own fifo structure. 1344 * Implemented as simple struct. 1345 * 1346 * TX SW Execution Flow 1347 * ~~~~~~~~~~~~~~~~~~~~ 1348 * OS calls driver's hard_xmit method with packet to sent. 1349 * Driver creates DMA mappings, builds TXD descriptors and kicks HW 1350 * by updating TXD WPTR. 1351 * When packet is sent, HW write us TXF descriptor and SW frees original skb. 1352 * To prevent TXD fifo overflow without reading HW registers every time, 1353 * SW deploys "tx level" technique. 1354 * Upon strart up, tx level is initialized to TXD fifo length. 1355 * For every sent packet, SW gets its TXD descriptor sizei 1356 * (from precalculated array) and substructs it from tx level. 1357 * The size is also stored in txdb. When TXF ack arrives, SW fetch size of 1358 * original TXD descriptor from txdb and adds it to tx level. 1359 * When Tx level drops under some predefined treshhold, the driver 1360 * stops the TX queue. When TX level rises above that level, 1361 * the tx queue is enabled again. 1362 * 1363 * This technique avoids eccessive reading of RPTR and WPTR registers. 1364 * As our benchmarks shows, it adds 1.5 Gbit/sec to NIS's throuput. 1365 */ 1366 1367 /** 1368 * __bdx_tx_db_ptr_next - helper function, increment read/write pointer + wrap 1369 * @db: tx data base 1370 * @pptr: read or write pointer 1371 */ 1372 static inline void __bdx_tx_db_ptr_next(struct txdb *db, struct tx_map **pptr) 1373 { 1374 BDX_ASSERT(db == NULL || pptr == NULL); /* sanity */ 1375 1376 BDX_ASSERT(*pptr != db->rptr && /* expect either read */ 1377 *pptr != db->wptr); /* or write pointer */ 1378 1379 BDX_ASSERT(*pptr < db->start || /* pointer has to be */ 1380 *pptr >= db->end); /* in range */ 1381 1382 ++*pptr; 1383 if (unlikely(*pptr == db->end)) 1384 *pptr = db->start; 1385 } 1386 1387 /** 1388 * bdx_tx_db_inc_rptr - increment read pointer 1389 * @db: tx data base 1390 */ 1391 static inline void bdx_tx_db_inc_rptr(struct txdb *db) 1392 { 1393 BDX_ASSERT(db->rptr == db->wptr); /* can't read from empty db */ 1394 __bdx_tx_db_ptr_next(db, &db->rptr); 1395 } 1396 1397 /** 1398 * bdx_tx_db_inc_wptr - increment write pointer 1399 * @db: tx data base 1400 */ 1401 static inline void bdx_tx_db_inc_wptr(struct txdb *db) 1402 { 1403 __bdx_tx_db_ptr_next(db, &db->wptr); 1404 BDX_ASSERT(db->rptr == db->wptr); /* we can not get empty db as 1405 a result of write */ 1406 } 1407 1408 /** 1409 * bdx_tx_db_init - creates and initializes tx db 1410 * @d: tx data base 1411 * @sz_type: size of tx fifo 1412 * 1413 * Returns 0 on success, error code otherwise 1414 */ 1415 static int bdx_tx_db_init(struct txdb *d, int sz_type) 1416 { 1417 int memsz = FIFO_SIZE * (1 << (sz_type + 1)); 1418 1419 d->start = vmalloc(memsz); 1420 if (!d->start) 1421 return -ENOMEM; 1422 1423 /* 1424 * In order to differentiate between db is empty and db is full 1425 * states at least one element should always be empty in order to 1426 * avoid rptr == wptr which means db is empty 1427 */ 1428 d->size = memsz / sizeof(struct tx_map) - 1; 1429 d->end = d->start + d->size + 1; /* just after last element */ 1430 1431 /* all dbs are created equally empty */ 1432 d->rptr = d->start; 1433 d->wptr = d->start; 1434 1435 return 0; 1436 } 1437 1438 /** 1439 * bdx_tx_db_close - closes tx db and frees all memory 1440 * @d: tx data base 1441 */ 1442 static void bdx_tx_db_close(struct txdb *d) 1443 { 1444 BDX_ASSERT(d == NULL); 1445 1446 vfree(d->start); 1447 d->start = NULL; 1448 } 1449 1450 /************************************************************************* 1451 * Tx Engine * 1452 *************************************************************************/ 1453 1454 /* sizes of tx desc (including padding if needed) as function 1455 * of skb's frag number */ 1456 static struct { 1457 u16 bytes; 1458 u16 qwords; /* qword = 64 bit */ 1459 } txd_sizes[MAX_SKB_FRAGS + 1]; 1460 1461 /** 1462 * bdx_tx_map_skb - creates and stores dma mappings for skb's data blocks 1463 * @priv: NIC private structure 1464 * @skb: socket buffer to map 1465 * @txdd: TX descriptor to use 1466 * 1467 * It makes dma mappings for skb's data blocks and writes them to PBL of 1468 * new tx descriptor. It also stores them in the tx db, so they could be 1469 * unmaped after data was sent. It is reponsibility of a caller to make 1470 * sure that there is enough space in the tx db. Last element holds pointer 1471 * to skb itself and marked with zero length 1472 */ 1473 static inline void 1474 bdx_tx_map_skb(struct bdx_priv *priv, struct sk_buff *skb, 1475 struct txd_desc *txdd) 1476 { 1477 struct txdb *db = &priv->txdb; 1478 struct pbl *pbl = &txdd->pbl[0]; 1479 int nr_frags = skb_shinfo(skb)->nr_frags; 1480 int i; 1481 1482 db->wptr->len = skb_headlen(skb); 1483 db->wptr->addr.dma = dma_map_single(&priv->pdev->dev, skb->data, 1484 db->wptr->len, DMA_TO_DEVICE); 1485 pbl->len = CPU_CHIP_SWAP32(db->wptr->len); 1486 pbl->pa_lo = CPU_CHIP_SWAP32(L32_64(db->wptr->addr.dma)); 1487 pbl->pa_hi = CPU_CHIP_SWAP32(H32_64(db->wptr->addr.dma)); 1488 DBG("=== pbl len: 0x%x ================\n", pbl->len); 1489 DBG("=== pbl pa_lo: 0x%x ================\n", pbl->pa_lo); 1490 DBG("=== pbl pa_hi: 0x%x ================\n", pbl->pa_hi); 1491 bdx_tx_db_inc_wptr(db); 1492 1493 for (i = 0; i < nr_frags; i++) { 1494 const skb_frag_t *frag; 1495 1496 frag = &skb_shinfo(skb)->frags[i]; 1497 db->wptr->len = skb_frag_size(frag); 1498 db->wptr->addr.dma = skb_frag_dma_map(&priv->pdev->dev, frag, 1499 0, skb_frag_size(frag), 1500 DMA_TO_DEVICE); 1501 1502 pbl++; 1503 pbl->len = CPU_CHIP_SWAP32(db->wptr->len); 1504 pbl->pa_lo = CPU_CHIP_SWAP32(L32_64(db->wptr->addr.dma)); 1505 pbl->pa_hi = CPU_CHIP_SWAP32(H32_64(db->wptr->addr.dma)); 1506 bdx_tx_db_inc_wptr(db); 1507 } 1508 1509 /* add skb clean up info. */ 1510 db->wptr->len = -txd_sizes[nr_frags].bytes; 1511 db->wptr->addr.skb = skb; 1512 bdx_tx_db_inc_wptr(db); 1513 } 1514 1515 /* init_txd_sizes - precalculate sizes of descriptors for skbs up to 16 frags 1516 * number of frags is used as index to fetch correct descriptors size, 1517 * instead of calculating it each time */ 1518 static void __init init_txd_sizes(void) 1519 { 1520 int i, lwords; 1521 1522 /* 7 - is number of lwords in txd with one phys buffer 1523 * 3 - is number of lwords used for every additional phys buffer */ 1524 for (i = 0; i < MAX_SKB_FRAGS + 1; i++) { 1525 lwords = 7 + (i * 3); 1526 if (lwords & 1) 1527 lwords++; /* pad it with 1 lword */ 1528 txd_sizes[i].qwords = lwords >> 1; 1529 txd_sizes[i].bytes = lwords << 2; 1530 } 1531 } 1532 1533 /* bdx_tx_init - initialize all Tx related stuff. 1534 * Namely, TXD and TXF fifos, database etc */ 1535 static int bdx_tx_init(struct bdx_priv *priv) 1536 { 1537 if (bdx_fifo_init(priv, &priv->txd_fifo0.m, priv->txd_size, 1538 regTXD_CFG0_0, 1539 regTXD_CFG1_0, regTXD_RPTR_0, regTXD_WPTR_0)) 1540 goto err_mem; 1541 if (bdx_fifo_init(priv, &priv->txf_fifo0.m, priv->txf_size, 1542 regTXF_CFG0_0, 1543 regTXF_CFG1_0, regTXF_RPTR_0, regTXF_WPTR_0)) 1544 goto err_mem; 1545 1546 /* The TX db has to keep mappings for all packets sent (on TxD) 1547 * and not yet reclaimed (on TxF) */ 1548 if (bdx_tx_db_init(&priv->txdb, max(priv->txd_size, priv->txf_size))) 1549 goto err_mem; 1550 1551 priv->tx_level = BDX_MAX_TX_LEVEL; 1552 #ifdef BDX_DELAY_WPTR 1553 priv->tx_update_mark = priv->tx_level - 1024; 1554 #endif 1555 return 0; 1556 1557 err_mem: 1558 netdev_err(priv->ndev, "Tx init failed\n"); 1559 return -ENOMEM; 1560 } 1561 1562 /** 1563 * bdx_tx_space - calculates available space in TX fifo 1564 * @priv: NIC private structure 1565 * 1566 * Returns available space in TX fifo in bytes 1567 */ 1568 static inline int bdx_tx_space(struct bdx_priv *priv) 1569 { 1570 struct txd_fifo *f = &priv->txd_fifo0; 1571 int fsize; 1572 1573 f->m.rptr = READ_REG(priv, f->m.reg_RPTR) & TXF_WPTR_WR_PTR; 1574 fsize = f->m.rptr - f->m.wptr; 1575 if (fsize <= 0) 1576 fsize = f->m.memsz + fsize; 1577 return fsize; 1578 } 1579 1580 /** 1581 * bdx_tx_transmit - send packet to NIC 1582 * @skb: packet to send 1583 * @ndev: network device assigned to NIC 1584 * Return codes: 1585 * o NETDEV_TX_OK everything ok. 1586 * o NETDEV_TX_BUSY Cannot transmit packet, try later 1587 * Usually a bug, means queue start/stop flow control is broken in 1588 * the driver. Note: the driver must NOT put the skb in its DMA ring. 1589 */ 1590 static netdev_tx_t bdx_tx_transmit(struct sk_buff *skb, 1591 struct net_device *ndev) 1592 { 1593 struct bdx_priv *priv = netdev_priv(ndev); 1594 struct txd_fifo *f = &priv->txd_fifo0; 1595 int txd_checksum = 7; /* full checksum */ 1596 int txd_lgsnd = 0; 1597 int txd_vlan_id = 0; 1598 int txd_vtag = 0; 1599 int txd_mss = 0; 1600 1601 int nr_frags = skb_shinfo(skb)->nr_frags; 1602 struct txd_desc *txdd; 1603 int len; 1604 unsigned long flags; 1605 1606 ENTER; 1607 local_irq_save(flags); 1608 spin_lock(&priv->tx_lock); 1609 1610 /* build tx descriptor */ 1611 BDX_ASSERT(f->m.wptr >= f->m.memsz); /* started with valid wptr */ 1612 txdd = (struct txd_desc *)(f->m.va + f->m.wptr); 1613 if (unlikely(skb->ip_summed != CHECKSUM_PARTIAL)) 1614 txd_checksum = 0; 1615 1616 if (skb_shinfo(skb)->gso_size) { 1617 txd_mss = skb_shinfo(skb)->gso_size; 1618 txd_lgsnd = 1; 1619 DBG("skb %p skb len %d gso size = %d\n", skb, skb->len, 1620 txd_mss); 1621 } 1622 1623 if (skb_vlan_tag_present(skb)) { 1624 /*Cut VLAN ID to 12 bits */ 1625 txd_vlan_id = skb_vlan_tag_get(skb) & BITS_MASK(12); 1626 txd_vtag = 1; 1627 } 1628 1629 txdd->length = CPU_CHIP_SWAP16(skb->len); 1630 txdd->mss = CPU_CHIP_SWAP16(txd_mss); 1631 txdd->txd_val1 = 1632 CPU_CHIP_SWAP32(TXD_W1_VAL 1633 (txd_sizes[nr_frags].qwords, txd_checksum, txd_vtag, 1634 txd_lgsnd, txd_vlan_id)); 1635 DBG("=== TxD desc =====================\n"); 1636 DBG("=== w1: 0x%x ================\n", txdd->txd_val1); 1637 DBG("=== w2: mss 0x%x len 0x%x\n", txdd->mss, txdd->length); 1638 1639 bdx_tx_map_skb(priv, skb, txdd); 1640 1641 /* increment TXD write pointer. In case of 1642 fifo wrapping copy reminder of the descriptor 1643 to the beginning */ 1644 f->m.wptr += txd_sizes[nr_frags].bytes; 1645 len = f->m.wptr - f->m.memsz; 1646 if (unlikely(len >= 0)) { 1647 f->m.wptr = len; 1648 if (len > 0) { 1649 BDX_ASSERT(len > f->m.memsz); 1650 memcpy(f->m.va, f->m.va + f->m.memsz, len); 1651 } 1652 } 1653 BDX_ASSERT(f->m.wptr >= f->m.memsz); /* finished with valid wptr */ 1654 1655 priv->tx_level -= txd_sizes[nr_frags].bytes; 1656 BDX_ASSERT(priv->tx_level <= 0 || priv->tx_level > BDX_MAX_TX_LEVEL); 1657 #ifdef BDX_DELAY_WPTR 1658 if (priv->tx_level > priv->tx_update_mark) { 1659 /* Force memory writes to complete before letting h/w 1660 know there are new descriptors to fetch. 1661 (might be needed on platforms like IA64) 1662 wmb(); */ 1663 WRITE_REG(priv, f->m.reg_WPTR, f->m.wptr & TXF_WPTR_WR_PTR); 1664 } else { 1665 if (priv->tx_noupd++ > BDX_NO_UPD_PACKETS) { 1666 priv->tx_noupd = 0; 1667 WRITE_REG(priv, f->m.reg_WPTR, 1668 f->m.wptr & TXF_WPTR_WR_PTR); 1669 } 1670 } 1671 #else 1672 /* Force memory writes to complete before letting h/w 1673 know there are new descriptors to fetch. 1674 (might be needed on platforms like IA64) 1675 wmb(); */ 1676 WRITE_REG(priv, f->m.reg_WPTR, f->m.wptr & TXF_WPTR_WR_PTR); 1677 1678 #endif 1679 #ifdef BDX_LLTX 1680 netif_trans_update(ndev); /* NETIF_F_LLTX driver :( */ 1681 #endif 1682 ndev->stats.tx_packets++; 1683 ndev->stats.tx_bytes += skb->len; 1684 1685 if (priv->tx_level < BDX_MIN_TX_LEVEL) { 1686 DBG("%s: %s: TX Q STOP level %d\n", 1687 BDX_DRV_NAME, ndev->name, priv->tx_level); 1688 netif_stop_queue(ndev); 1689 } 1690 1691 spin_unlock_irqrestore(&priv->tx_lock, flags); 1692 return NETDEV_TX_OK; 1693 } 1694 1695 /** 1696 * bdx_tx_cleanup - clean TXF fifo, run in the context of IRQ. 1697 * @priv: bdx adapter 1698 * 1699 * It scans TXF fifo for descriptors, frees DMA mappings and reports to OS 1700 * that those packets were sent 1701 */ 1702 static void bdx_tx_cleanup(struct bdx_priv *priv) 1703 { 1704 struct txf_fifo *f = &priv->txf_fifo0; 1705 struct txdb *db = &priv->txdb; 1706 int tx_level = 0; 1707 1708 ENTER; 1709 f->m.wptr = READ_REG(priv, f->m.reg_WPTR) & TXF_WPTR_MASK; 1710 BDX_ASSERT(f->m.rptr >= f->m.memsz); /* started with valid rptr */ 1711 1712 while (f->m.wptr != f->m.rptr) { 1713 f->m.rptr += BDX_TXF_DESC_SZ; 1714 f->m.rptr &= f->m.size_mask; 1715 1716 /* unmap all the fragments */ 1717 /* first has to come tx_maps containing dma */ 1718 BDX_ASSERT(db->rptr->len == 0); 1719 do { 1720 BDX_ASSERT(db->rptr->addr.dma == 0); 1721 dma_unmap_page(&priv->pdev->dev, db->rptr->addr.dma, 1722 db->rptr->len, DMA_TO_DEVICE); 1723 bdx_tx_db_inc_rptr(db); 1724 } while (db->rptr->len > 0); 1725 tx_level -= db->rptr->len; /* '-' koz len is negative */ 1726 1727 /* now should come skb pointer - free it */ 1728 dev_consume_skb_irq(db->rptr->addr.skb); 1729 bdx_tx_db_inc_rptr(db); 1730 } 1731 1732 /* let h/w know which TXF descriptors were cleaned */ 1733 BDX_ASSERT((f->m.wptr & TXF_WPTR_WR_PTR) >= f->m.memsz); 1734 WRITE_REG(priv, f->m.reg_RPTR, f->m.rptr & TXF_WPTR_WR_PTR); 1735 1736 /* We reclaimed resources, so in case the Q is stopped by xmit callback, 1737 * we resume the transmission and use tx_lock to synchronize with xmit.*/ 1738 spin_lock(&priv->tx_lock); 1739 priv->tx_level += tx_level; 1740 BDX_ASSERT(priv->tx_level <= 0 || priv->tx_level > BDX_MAX_TX_LEVEL); 1741 #ifdef BDX_DELAY_WPTR 1742 if (priv->tx_noupd) { 1743 priv->tx_noupd = 0; 1744 WRITE_REG(priv, priv->txd_fifo0.m.reg_WPTR, 1745 priv->txd_fifo0.m.wptr & TXF_WPTR_WR_PTR); 1746 } 1747 #endif 1748 1749 if (unlikely(netif_queue_stopped(priv->ndev) && 1750 netif_carrier_ok(priv->ndev) && 1751 (priv->tx_level >= BDX_MIN_TX_LEVEL))) { 1752 DBG("%s: %s: TX Q WAKE level %d\n", 1753 BDX_DRV_NAME, priv->ndev->name, priv->tx_level); 1754 netif_wake_queue(priv->ndev); 1755 } 1756 spin_unlock(&priv->tx_lock); 1757 } 1758 1759 /** 1760 * bdx_tx_free_skbs - frees all skbs from TXD fifo. 1761 * @priv: NIC private structure 1762 * 1763 * It gets called when OS stops this dev, eg upon "ifconfig down" or rmmod 1764 */ 1765 static void bdx_tx_free_skbs(struct bdx_priv *priv) 1766 { 1767 struct txdb *db = &priv->txdb; 1768 1769 ENTER; 1770 while (db->rptr != db->wptr) { 1771 if (likely(db->rptr->len)) 1772 dma_unmap_page(&priv->pdev->dev, db->rptr->addr.dma, 1773 db->rptr->len, DMA_TO_DEVICE); 1774 else 1775 dev_kfree_skb(db->rptr->addr.skb); 1776 bdx_tx_db_inc_rptr(db); 1777 } 1778 RET(); 1779 } 1780 1781 /* bdx_tx_free - frees all Tx resources */ 1782 static void bdx_tx_free(struct bdx_priv *priv) 1783 { 1784 ENTER; 1785 bdx_tx_free_skbs(priv); 1786 bdx_fifo_free(priv, &priv->txd_fifo0.m); 1787 bdx_fifo_free(priv, &priv->txf_fifo0.m); 1788 bdx_tx_db_close(&priv->txdb); 1789 } 1790 1791 /** 1792 * bdx_tx_push_desc - push descriptor to TxD fifo 1793 * @priv: NIC private structure 1794 * @data: desc's data 1795 * @size: desc's size 1796 * 1797 * Pushes desc to TxD fifo and overlaps it if needed. 1798 * NOTE: this func does not check for available space. this is responsibility 1799 * of the caller. Neither does it check that data size is smaller than 1800 * fifo size. 1801 */ 1802 static void bdx_tx_push_desc(struct bdx_priv *priv, void *data, int size) 1803 { 1804 struct txd_fifo *f = &priv->txd_fifo0; 1805 int i = f->m.memsz - f->m.wptr; 1806 1807 if (size == 0) 1808 return; 1809 1810 if (i > size) { 1811 memcpy(f->m.va + f->m.wptr, data, size); 1812 f->m.wptr += size; 1813 } else { 1814 memcpy(f->m.va + f->m.wptr, data, i); 1815 f->m.wptr = size - i; 1816 memcpy(f->m.va, data + i, f->m.wptr); 1817 } 1818 WRITE_REG(priv, f->m.reg_WPTR, f->m.wptr & TXF_WPTR_WR_PTR); 1819 } 1820 1821 /** 1822 * bdx_tx_push_desc_safe - push descriptor to TxD fifo in a safe way 1823 * @priv: NIC private structure 1824 * @data: desc's data 1825 * @size: desc's size 1826 * 1827 * NOTE: this func does check for available space and, if necessary, waits for 1828 * NIC to read existing data before writing new one. 1829 */ 1830 static void bdx_tx_push_desc_safe(struct bdx_priv *priv, void *data, int size) 1831 { 1832 int timer = 0; 1833 ENTER; 1834 1835 while (size > 0) { 1836 /* we substruct 8 because when fifo is full rptr == wptr 1837 which also means that fifo is empty, we can understand 1838 the difference, but could hw do the same ??? :) */ 1839 int avail = bdx_tx_space(priv) - 8; 1840 if (avail <= 0) { 1841 if (timer++ > 300) { /* prevent endless loop */ 1842 DBG("timeout while writing desc to TxD fifo\n"); 1843 break; 1844 } 1845 udelay(50); /* give hw a chance to clean fifo */ 1846 continue; 1847 } 1848 avail = min(avail, size); 1849 DBG("about to push %d bytes starting %p size %d\n", avail, 1850 data, size); 1851 bdx_tx_push_desc(priv, data, avail); 1852 size -= avail; 1853 data += avail; 1854 } 1855 RET(); 1856 } 1857 1858 static const struct net_device_ops bdx_netdev_ops = { 1859 .ndo_open = bdx_open, 1860 .ndo_stop = bdx_close, 1861 .ndo_start_xmit = bdx_tx_transmit, 1862 .ndo_validate_addr = eth_validate_addr, 1863 .ndo_do_ioctl = bdx_ioctl, 1864 .ndo_set_rx_mode = bdx_setmulti, 1865 .ndo_change_mtu = bdx_change_mtu, 1866 .ndo_set_mac_address = bdx_set_mac, 1867 .ndo_vlan_rx_add_vid = bdx_vlan_rx_add_vid, 1868 .ndo_vlan_rx_kill_vid = bdx_vlan_rx_kill_vid, 1869 }; 1870 1871 /** 1872 * bdx_probe - Device Initialization Routine 1873 * @pdev: PCI device information struct 1874 * @ent: entry in bdx_pci_tbl 1875 * 1876 * Returns 0 on success, negative on failure 1877 * 1878 * bdx_probe initializes an adapter identified by a pci_dev structure. 1879 * The OS initialization, configuring of the adapter private structure, 1880 * and a hardware reset occur. 1881 * 1882 * functions and their order used as explained in 1883 * /usr/src/linux/Documentation/DMA-{API,mapping}.txt 1884 * 1885 */ 1886 1887 /* TBD: netif_msg should be checked and implemented. I disable it for now */ 1888 static int 1889 bdx_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 1890 { 1891 struct net_device *ndev; 1892 struct bdx_priv *priv; 1893 int err, pci_using_dac, port; 1894 unsigned long pciaddr; 1895 u32 regionSize; 1896 struct pci_nic *nic; 1897 1898 ENTER; 1899 1900 nic = vmalloc(sizeof(*nic)); 1901 if (!nic) 1902 RET(-ENOMEM); 1903 1904 /************** pci *****************/ 1905 err = pci_enable_device(pdev); 1906 if (err) /* it triggers interrupt, dunno why. */ 1907 goto err_pci; /* it's not a problem though */ 1908 1909 if (!(err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) && 1910 !(err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)))) { 1911 pci_using_dac = 1; 1912 } else { 1913 if ((err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) || 1914 (err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)))) { 1915 pr_err("No usable DMA configuration, aborting\n"); 1916 goto err_dma; 1917 } 1918 pci_using_dac = 0; 1919 } 1920 1921 err = pci_request_regions(pdev, BDX_DRV_NAME); 1922 if (err) 1923 goto err_dma; 1924 1925 pci_set_master(pdev); 1926 1927 pciaddr = pci_resource_start(pdev, 0); 1928 if (!pciaddr) { 1929 err = -EIO; 1930 pr_err("no MMIO resource\n"); 1931 goto err_out_res; 1932 } 1933 regionSize = pci_resource_len(pdev, 0); 1934 if (regionSize < BDX_REGS_SIZE) { 1935 err = -EIO; 1936 pr_err("MMIO resource (%x) too small\n", regionSize); 1937 goto err_out_res; 1938 } 1939 1940 nic->regs = ioremap(pciaddr, regionSize); 1941 if (!nic->regs) { 1942 err = -EIO; 1943 pr_err("ioremap failed\n"); 1944 goto err_out_res; 1945 } 1946 1947 if (pdev->irq < 2) { 1948 err = -EIO; 1949 pr_err("invalid irq (%d)\n", pdev->irq); 1950 goto err_out_iomap; 1951 } 1952 pci_set_drvdata(pdev, nic); 1953 1954 if (pdev->device == 0x3014) 1955 nic->port_num = 2; 1956 else 1957 nic->port_num = 1; 1958 1959 print_hw_id(pdev); 1960 1961 bdx_hw_reset_direct(nic->regs); 1962 1963 nic->irq_type = IRQ_INTX; 1964 #ifdef BDX_MSI 1965 if ((readl(nic->regs + FPGA_VER) & 0xFFF) >= 378) { 1966 err = pci_enable_msi(pdev); 1967 if (err) 1968 pr_err("Can't enable msi. error is %d\n", err); 1969 else 1970 nic->irq_type = IRQ_MSI; 1971 } else 1972 DBG("HW does not support MSI\n"); 1973 #endif 1974 1975 /************** netdev **************/ 1976 for (port = 0; port < nic->port_num; port++) { 1977 ndev = alloc_etherdev(sizeof(struct bdx_priv)); 1978 if (!ndev) { 1979 err = -ENOMEM; 1980 goto err_out_iomap; 1981 } 1982 1983 ndev->netdev_ops = &bdx_netdev_ops; 1984 ndev->tx_queue_len = BDX_NDEV_TXQ_LEN; 1985 1986 bdx_set_ethtool_ops(ndev); /* ethtool interface */ 1987 1988 /* these fields are used for info purposes only 1989 * so we can have them same for all ports of the board */ 1990 ndev->if_port = port; 1991 ndev->features = NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_TSO 1992 | NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX | 1993 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM 1994 ; 1995 ndev->hw_features = NETIF_F_IP_CSUM | NETIF_F_SG | 1996 NETIF_F_TSO | NETIF_F_HW_VLAN_CTAG_TX; 1997 1998 if (pci_using_dac) 1999 ndev->features |= NETIF_F_HIGHDMA; 2000 2001 /************** priv ****************/ 2002 priv = nic->priv[port] = netdev_priv(ndev); 2003 2004 priv->pBdxRegs = nic->regs + port * 0x8000; 2005 priv->port = port; 2006 priv->pdev = pdev; 2007 priv->ndev = ndev; 2008 priv->nic = nic; 2009 priv->msg_enable = BDX_DEF_MSG_ENABLE; 2010 2011 netif_napi_add(ndev, &priv->napi, bdx_poll, 64); 2012 2013 if ((readl(nic->regs + FPGA_VER) & 0xFFF) == 308) { 2014 DBG("HW statistics not supported\n"); 2015 priv->stats_flag = 0; 2016 } else { 2017 priv->stats_flag = 1; 2018 } 2019 2020 /* Initialize fifo sizes. */ 2021 priv->txd_size = 2; 2022 priv->txf_size = 2; 2023 priv->rxd_size = 2; 2024 priv->rxf_size = 3; 2025 2026 /* Initialize the initial coalescing registers. */ 2027 priv->rdintcm = INT_REG_VAL(0x20, 1, 4, 12); 2028 priv->tdintcm = INT_REG_VAL(0x20, 1, 0, 12); 2029 2030 /* ndev->xmit_lock spinlock is not used. 2031 * Private priv->tx_lock is used for synchronization 2032 * between transmit and TX irq cleanup. In addition 2033 * set multicast list callback has to use priv->tx_lock. 2034 */ 2035 #ifdef BDX_LLTX 2036 ndev->features |= NETIF_F_LLTX; 2037 #endif 2038 /* MTU range: 60 - 16384 */ 2039 ndev->min_mtu = ETH_ZLEN; 2040 ndev->max_mtu = BDX_MAX_MTU; 2041 2042 spin_lock_init(&priv->tx_lock); 2043 2044 /*bdx_hw_reset(priv); */ 2045 if (bdx_read_mac(priv)) { 2046 pr_err("load MAC address failed\n"); 2047 err = -EFAULT; 2048 goto err_out_iomap; 2049 } 2050 SET_NETDEV_DEV(ndev, &pdev->dev); 2051 err = register_netdev(ndev); 2052 if (err) { 2053 pr_err("register_netdev failed\n"); 2054 goto err_out_free; 2055 } 2056 netif_carrier_off(ndev); 2057 netif_stop_queue(ndev); 2058 2059 print_eth_id(ndev); 2060 } 2061 RET(0); 2062 2063 err_out_free: 2064 free_netdev(ndev); 2065 err_out_iomap: 2066 iounmap(nic->regs); 2067 err_out_res: 2068 pci_release_regions(pdev); 2069 err_dma: 2070 pci_disable_device(pdev); 2071 err_pci: 2072 vfree(nic); 2073 2074 RET(err); 2075 } 2076 2077 /****************** Ethtool interface *********************/ 2078 /* get strings for statistics counters */ 2079 static const char 2080 bdx_stat_names[][ETH_GSTRING_LEN] = { 2081 "InUCast", /* 0x7200 */ 2082 "InMCast", /* 0x7210 */ 2083 "InBCast", /* 0x7220 */ 2084 "InPkts", /* 0x7230 */ 2085 "InErrors", /* 0x7240 */ 2086 "InDropped", /* 0x7250 */ 2087 "FrameTooLong", /* 0x7260 */ 2088 "FrameSequenceErrors", /* 0x7270 */ 2089 "InVLAN", /* 0x7280 */ 2090 "InDroppedDFE", /* 0x7290 */ 2091 "InDroppedIntFull", /* 0x72A0 */ 2092 "InFrameAlignErrors", /* 0x72B0 */ 2093 2094 /* 0x72C0-0x72E0 RSRV */ 2095 2096 "OutUCast", /* 0x72F0 */ 2097 "OutMCast", /* 0x7300 */ 2098 "OutBCast", /* 0x7310 */ 2099 "OutPkts", /* 0x7320 */ 2100 2101 /* 0x7330-0x7360 RSRV */ 2102 2103 "OutVLAN", /* 0x7370 */ 2104 "InUCastOctects", /* 0x7380 */ 2105 "OutUCastOctects", /* 0x7390 */ 2106 2107 /* 0x73A0-0x73B0 RSRV */ 2108 2109 "InBCastOctects", /* 0x73C0 */ 2110 "OutBCastOctects", /* 0x73D0 */ 2111 "InOctects", /* 0x73E0 */ 2112 "OutOctects", /* 0x73F0 */ 2113 }; 2114 2115 /* 2116 * bdx_get_link_ksettings - get device-specific settings 2117 * @netdev 2118 * @ecmd 2119 */ 2120 static int bdx_get_link_ksettings(struct net_device *netdev, 2121 struct ethtool_link_ksettings *ecmd) 2122 { 2123 ethtool_link_ksettings_zero_link_mode(ecmd, supported); 2124 ethtool_link_ksettings_add_link_mode(ecmd, supported, 2125 10000baseT_Full); 2126 ethtool_link_ksettings_add_link_mode(ecmd, supported, FIBRE); 2127 ethtool_link_ksettings_zero_link_mode(ecmd, advertising); 2128 ethtool_link_ksettings_add_link_mode(ecmd, advertising, 2129 10000baseT_Full); 2130 ethtool_link_ksettings_add_link_mode(ecmd, advertising, FIBRE); 2131 2132 ecmd->base.speed = SPEED_10000; 2133 ecmd->base.duplex = DUPLEX_FULL; 2134 ecmd->base.port = PORT_FIBRE; 2135 ecmd->base.autoneg = AUTONEG_DISABLE; 2136 2137 return 0; 2138 } 2139 2140 /* 2141 * bdx_get_drvinfo - report driver information 2142 * @netdev 2143 * @drvinfo 2144 */ 2145 static void 2146 bdx_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *drvinfo) 2147 { 2148 struct bdx_priv *priv = netdev_priv(netdev); 2149 2150 strlcpy(drvinfo->driver, BDX_DRV_NAME, sizeof(drvinfo->driver)); 2151 strlcpy(drvinfo->version, BDX_DRV_VERSION, sizeof(drvinfo->version)); 2152 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); 2153 strlcpy(drvinfo->bus_info, pci_name(priv->pdev), 2154 sizeof(drvinfo->bus_info)); 2155 } 2156 2157 /* 2158 * bdx_get_coalesce - get interrupt coalescing parameters 2159 * @netdev 2160 * @ecoal 2161 */ 2162 static int 2163 bdx_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *ecoal) 2164 { 2165 u32 rdintcm; 2166 u32 tdintcm; 2167 struct bdx_priv *priv = netdev_priv(netdev); 2168 2169 rdintcm = priv->rdintcm; 2170 tdintcm = priv->tdintcm; 2171 2172 /* PCK_TH measures in multiples of FIFO bytes 2173 We translate to packets */ 2174 ecoal->rx_coalesce_usecs = GET_INT_COAL(rdintcm) * INT_COAL_MULT; 2175 ecoal->rx_max_coalesced_frames = 2176 ((GET_PCK_TH(rdintcm) * PCK_TH_MULT) / sizeof(struct rxf_desc)); 2177 2178 ecoal->tx_coalesce_usecs = GET_INT_COAL(tdintcm) * INT_COAL_MULT; 2179 ecoal->tx_max_coalesced_frames = 2180 ((GET_PCK_TH(tdintcm) * PCK_TH_MULT) / BDX_TXF_DESC_SZ); 2181 2182 /* adaptive parameters ignored */ 2183 return 0; 2184 } 2185 2186 /* 2187 * bdx_set_coalesce - set interrupt coalescing parameters 2188 * @netdev 2189 * @ecoal 2190 */ 2191 static int 2192 bdx_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *ecoal) 2193 { 2194 u32 rdintcm; 2195 u32 tdintcm; 2196 struct bdx_priv *priv = netdev_priv(netdev); 2197 int rx_coal; 2198 int tx_coal; 2199 int rx_max_coal; 2200 int tx_max_coal; 2201 2202 /* Check for valid input */ 2203 rx_coal = ecoal->rx_coalesce_usecs / INT_COAL_MULT; 2204 tx_coal = ecoal->tx_coalesce_usecs / INT_COAL_MULT; 2205 rx_max_coal = ecoal->rx_max_coalesced_frames; 2206 tx_max_coal = ecoal->tx_max_coalesced_frames; 2207 2208 /* Translate from packets to multiples of FIFO bytes */ 2209 rx_max_coal = 2210 (((rx_max_coal * sizeof(struct rxf_desc)) + PCK_TH_MULT - 1) 2211 / PCK_TH_MULT); 2212 tx_max_coal = 2213 (((tx_max_coal * BDX_TXF_DESC_SZ) + PCK_TH_MULT - 1) 2214 / PCK_TH_MULT); 2215 2216 if ((rx_coal > 0x7FFF) || (tx_coal > 0x7FFF) || 2217 (rx_max_coal > 0xF) || (tx_max_coal > 0xF)) 2218 return -EINVAL; 2219 2220 rdintcm = INT_REG_VAL(rx_coal, GET_INT_COAL_RC(priv->rdintcm), 2221 GET_RXF_TH(priv->rdintcm), rx_max_coal); 2222 tdintcm = INT_REG_VAL(tx_coal, GET_INT_COAL_RC(priv->tdintcm), 0, 2223 tx_max_coal); 2224 2225 priv->rdintcm = rdintcm; 2226 priv->tdintcm = tdintcm; 2227 2228 WRITE_REG(priv, regRDINTCM0, rdintcm); 2229 WRITE_REG(priv, regTDINTCM0, tdintcm); 2230 2231 return 0; 2232 } 2233 2234 /* Convert RX fifo size to number of pending packets */ 2235 static inline int bdx_rx_fifo_size_to_packets(int rx_size) 2236 { 2237 return (FIFO_SIZE * (1 << rx_size)) / sizeof(struct rxf_desc); 2238 } 2239 2240 /* Convert TX fifo size to number of pending packets */ 2241 static inline int bdx_tx_fifo_size_to_packets(int tx_size) 2242 { 2243 return (FIFO_SIZE * (1 << tx_size)) / BDX_TXF_DESC_SZ; 2244 } 2245 2246 /* 2247 * bdx_get_ringparam - report ring sizes 2248 * @netdev 2249 * @ring 2250 */ 2251 static void 2252 bdx_get_ringparam(struct net_device *netdev, struct ethtool_ringparam *ring) 2253 { 2254 struct bdx_priv *priv = netdev_priv(netdev); 2255 2256 /*max_pending - the maximum-sized FIFO we allow */ 2257 ring->rx_max_pending = bdx_rx_fifo_size_to_packets(3); 2258 ring->tx_max_pending = bdx_tx_fifo_size_to_packets(3); 2259 ring->rx_pending = bdx_rx_fifo_size_to_packets(priv->rxf_size); 2260 ring->tx_pending = bdx_tx_fifo_size_to_packets(priv->txd_size); 2261 } 2262 2263 /* 2264 * bdx_set_ringparam - set ring sizes 2265 * @netdev 2266 * @ring 2267 */ 2268 static int 2269 bdx_set_ringparam(struct net_device *netdev, struct ethtool_ringparam *ring) 2270 { 2271 struct bdx_priv *priv = netdev_priv(netdev); 2272 int rx_size = 0; 2273 int tx_size = 0; 2274 2275 for (; rx_size < 4; rx_size++) { 2276 if (bdx_rx_fifo_size_to_packets(rx_size) >= ring->rx_pending) 2277 break; 2278 } 2279 if (rx_size == 4) 2280 rx_size = 3; 2281 2282 for (; tx_size < 4; tx_size++) { 2283 if (bdx_tx_fifo_size_to_packets(tx_size) >= ring->tx_pending) 2284 break; 2285 } 2286 if (tx_size == 4) 2287 tx_size = 3; 2288 2289 /*Is there anything to do? */ 2290 if ((rx_size == priv->rxf_size) && 2291 (tx_size == priv->txd_size)) 2292 return 0; 2293 2294 priv->rxf_size = rx_size; 2295 if (rx_size > 1) 2296 priv->rxd_size = rx_size - 1; 2297 else 2298 priv->rxd_size = rx_size; 2299 2300 priv->txf_size = priv->txd_size = tx_size; 2301 2302 if (netif_running(netdev)) { 2303 bdx_close(netdev); 2304 bdx_open(netdev); 2305 } 2306 return 0; 2307 } 2308 2309 /* 2310 * bdx_get_strings - return a set of strings that describe the requested objects 2311 * @netdev 2312 * @data 2313 */ 2314 static void bdx_get_strings(struct net_device *netdev, u32 stringset, u8 *data) 2315 { 2316 switch (stringset) { 2317 case ETH_SS_STATS: 2318 memcpy(data, *bdx_stat_names, sizeof(bdx_stat_names)); 2319 break; 2320 } 2321 } 2322 2323 /* 2324 * bdx_get_sset_count - return number of statistics or tests 2325 * @netdev 2326 */ 2327 static int bdx_get_sset_count(struct net_device *netdev, int stringset) 2328 { 2329 struct bdx_priv *priv = netdev_priv(netdev); 2330 2331 switch (stringset) { 2332 case ETH_SS_STATS: 2333 BDX_ASSERT(ARRAY_SIZE(bdx_stat_names) 2334 != sizeof(struct bdx_stats) / sizeof(u64)); 2335 return (priv->stats_flag) ? ARRAY_SIZE(bdx_stat_names) : 0; 2336 } 2337 2338 return -EINVAL; 2339 } 2340 2341 /* 2342 * bdx_get_ethtool_stats - return device's hardware L2 statistics 2343 * @netdev 2344 * @stats 2345 * @data 2346 */ 2347 static void bdx_get_ethtool_stats(struct net_device *netdev, 2348 struct ethtool_stats *stats, u64 *data) 2349 { 2350 struct bdx_priv *priv = netdev_priv(netdev); 2351 2352 if (priv->stats_flag) { 2353 2354 /* Update stats from HW */ 2355 bdx_update_stats(priv); 2356 2357 /* Copy data to user buffer */ 2358 memcpy(data, &priv->hw_stats, sizeof(priv->hw_stats)); 2359 } 2360 } 2361 2362 /* 2363 * bdx_set_ethtool_ops - ethtool interface implementation 2364 * @netdev 2365 */ 2366 static void bdx_set_ethtool_ops(struct net_device *netdev) 2367 { 2368 static const struct ethtool_ops bdx_ethtool_ops = { 2369 .supported_coalesce_params = ETHTOOL_COALESCE_USECS | 2370 ETHTOOL_COALESCE_MAX_FRAMES, 2371 .get_drvinfo = bdx_get_drvinfo, 2372 .get_link = ethtool_op_get_link, 2373 .get_coalesce = bdx_get_coalesce, 2374 .set_coalesce = bdx_set_coalesce, 2375 .get_ringparam = bdx_get_ringparam, 2376 .set_ringparam = bdx_set_ringparam, 2377 .get_strings = bdx_get_strings, 2378 .get_sset_count = bdx_get_sset_count, 2379 .get_ethtool_stats = bdx_get_ethtool_stats, 2380 .get_link_ksettings = bdx_get_link_ksettings, 2381 }; 2382 2383 netdev->ethtool_ops = &bdx_ethtool_ops; 2384 } 2385 2386 /** 2387 * bdx_remove - Device Removal Routine 2388 * @pdev: PCI device information struct 2389 * 2390 * bdx_remove is called by the PCI subsystem to alert the driver 2391 * that it should release a PCI device. The could be caused by a 2392 * Hot-Plug event, or because the driver is going to be removed from 2393 * memory. 2394 **/ 2395 static void bdx_remove(struct pci_dev *pdev) 2396 { 2397 struct pci_nic *nic = pci_get_drvdata(pdev); 2398 struct net_device *ndev; 2399 int port; 2400 2401 for (port = 0; port < nic->port_num; port++) { 2402 ndev = nic->priv[port]->ndev; 2403 unregister_netdev(ndev); 2404 free_netdev(ndev); 2405 } 2406 2407 /*bdx_hw_reset_direct(nic->regs); */ 2408 #ifdef BDX_MSI 2409 if (nic->irq_type == IRQ_MSI) 2410 pci_disable_msi(pdev); 2411 #endif 2412 2413 iounmap(nic->regs); 2414 pci_release_regions(pdev); 2415 pci_disable_device(pdev); 2416 vfree(nic); 2417 2418 RET(); 2419 } 2420 2421 static struct pci_driver bdx_pci_driver = { 2422 .name = BDX_DRV_NAME, 2423 .id_table = bdx_pci_tbl, 2424 .probe = bdx_probe, 2425 .remove = bdx_remove, 2426 }; 2427 2428 /* 2429 * print_driver_id - print parameters of the driver build 2430 */ 2431 static void __init print_driver_id(void) 2432 { 2433 pr_info("%s, %s\n", BDX_DRV_DESC, BDX_DRV_VERSION); 2434 pr_info("Options: hw_csum %s\n", BDX_MSI_STRING); 2435 } 2436 2437 static int __init bdx_module_init(void) 2438 { 2439 ENTER; 2440 init_txd_sizes(); 2441 print_driver_id(); 2442 RET(pci_register_driver(&bdx_pci_driver)); 2443 } 2444 2445 module_init(bdx_module_init); 2446 2447 static void __exit bdx_module_exit(void) 2448 { 2449 ENTER; 2450 pci_unregister_driver(&bdx_pci_driver); 2451 RET(); 2452 } 2453 2454 module_exit(bdx_module_exit); 2455 2456 MODULE_LICENSE("GPL"); 2457 MODULE_AUTHOR(DRIVER_AUTHOR); 2458 MODULE_DESCRIPTION(BDX_DRV_DESC); 2459 MODULE_FIRMWARE("tehuti/bdx.bin"); 2460