2 * Tehuti Networks(R) Network Driver
3 * ethtool interface implementation
4 * Copyright (C) 2007 Tehuti Networks Ltd. All rights reserved
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
13 * RX HW/SW interaction overview
14 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
15 * There are 2 types of RX communication channels between driver and NIC.
16 * 1) RX Free Fifo - RXF - holds descriptors of empty buffers to accept incoming
17 * traffic. This Fifo is filled by SW and is readen by HW. Each descriptor holds
18 * info about buffer's location, size and ID. An ID field is used to identify a
19 * buffer when it's returned with data via RXD Fifo (see below)
20 * 2) RX Data Fifo - RXD - holds descriptors of full buffers. This Fifo is
21 * filled by HW and is readen by SW. Each descriptor holds status and ID.
22 * HW pops descriptor from RXF Fifo, stores ID, fills buffer with incoming data,
23 * via dma moves it into host memory, builds new RXD descriptor with same ID,
24 * pushes it into RXD Fifo and raises interrupt to indicate new RX data.
26 * Current NIC configuration (registers + firmware) makes NIC use 2 RXF Fifos.
27 * One holds 1.5K packets and another - 26K packets. Depending on incoming
28 * packet size, HW desides on a RXF Fifo to pop buffer from. When packet is
29 * filled with data, HW builds new RXD descriptor for it and push it into single
32 * RX SW Data Structures
33 * ~~~~~~~~~~~~~~~~~~~~~
34 * skb db - used to keep track of all skbs owned by SW and their dma addresses.
35 * For RX case, ownership lasts from allocating new empty skb for RXF until
36 * accepting full skb from RXD and passing it to OS. Each RXF Fifo has its own
37 * skb db. Implemented as array with bitmask.
38 * fifo - keeps info about fifo's size and location, relevant HW registers,
39 * usage and skb db. Each RXD and RXF Fifo has its own fifo structure.
40 * Implemented as simple struct.
42 * RX SW Execution Flow
43 * ~~~~~~~~~~~~~~~~~~~~
44 * Upon initialization (ifconfig up) driver creates RX fifos and initializes
45 * relevant registers. At the end of init phase, driver enables interrupts.
46 * NIC sees that there is no RXF buffers and raises
47 * RD_INTR interrupt, isr fills skbs and Rx begins.
48 * Driver has two receive operation modes:
49 * NAPI - interrupt-driven mixed with polling
50 * interrupt-driven only
52 * Interrupt-driven only flow is following. When buffer is ready, HW raises
53 * interrupt and isr is called. isr collects all available packets
54 * (bdx_rx_receive), refills skbs (bdx_rx_alloc_skbs) and exit.
56 * Rx buffer allocation note
57 * ~~~~~~~~~~~~~~~~~~~~~~~~~
58 * Driver cares to feed such amount of RxF descriptors that respective amount of
59 * RxD descriptors can not fill entire RxD fifo. The main reason is lack of
60 * overflow check in Bordeaux for RxD fifo free/used size.
61 * FIXME: this is NOT fully implemented, more work should be done
65 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
69 static const struct pci_device_id bdx_pci_tbl[] = {
70 { PCI_VDEVICE(TEHUTI, 0x3009), },
71 { PCI_VDEVICE(TEHUTI, 0x3010), },
72 { PCI_VDEVICE(TEHUTI, 0x3014), },
76 MODULE_DEVICE_TABLE(pci, bdx_pci_tbl);
78 /* Definitions needed by ISR or NAPI functions */
79 static void bdx_rx_alloc_skbs(struct bdx_priv *priv, struct rxf_fifo *f);
80 static void bdx_tx_cleanup(struct bdx_priv *priv);
81 static int bdx_rx_receive(struct bdx_priv *priv, struct rxd_fifo *f, int budget);
83 /* Definitions needed by FW loading */
84 static void bdx_tx_push_desc_safe(struct bdx_priv *priv, void *data, int size);
86 /* Definitions needed by hw_start */
87 static int bdx_tx_init(struct bdx_priv *priv);
88 static int bdx_rx_init(struct bdx_priv *priv);
90 /* Definitions needed by bdx_close */
91 static void bdx_rx_free(struct bdx_priv *priv);
92 static void bdx_tx_free(struct bdx_priv *priv);
94 /* Definitions needed by bdx_probe */
95 static void bdx_set_ethtool_ops(struct net_device *netdev);
97 /*************************************************************************
99 *************************************************************************/
101 static void print_hw_id(struct pci_dev *pdev)
103 struct pci_nic *nic = pci_get_drvdata(pdev);
104 u16 pci_link_status = 0;
107 pci_read_config_word(pdev, PCI_LINK_STATUS_REG, &pci_link_status);
108 pci_read_config_word(pdev, PCI_DEV_CTRL_REG, &pci_ctrl);
110 pr_info("%s%s\n", BDX_NIC_NAME,
111 nic->port_num == 1 ? "" : ", 2-Port");
112 pr_info("srom 0x%x fpga %d build %u lane# %d max_pl 0x%x mrrs 0x%x\n",
113 readl(nic->regs + SROM_VER), readl(nic->regs + FPGA_VER) & 0xFFF,
114 readl(nic->regs + FPGA_SEED),
115 GET_LINK_STATUS_LANES(pci_link_status),
116 GET_DEV_CTRL_MAXPL(pci_ctrl), GET_DEV_CTRL_MRRS(pci_ctrl));
119 static void print_fw_id(struct pci_nic *nic)
121 pr_info("fw 0x%x\n", readl(nic->regs + FW_VER));
124 static void print_eth_id(struct net_device *ndev)
126 netdev_info(ndev, "%s, Port %c\n",
127 BDX_NIC_NAME, (ndev->if_port == 0) ? 'A' : 'B');
131 /*************************************************************************
133 *************************************************************************/
135 #define bdx_enable_interrupts(priv) \
136 do { WRITE_REG(priv, regIMR, IR_RUN); } while (0)
137 #define bdx_disable_interrupts(priv) \
138 do { WRITE_REG(priv, regIMR, 0); } while (0)
141 * bdx_fifo_init - create TX/RX descriptor fifo for host-NIC communication.
142 * @priv: NIC private structure
143 * @f: fifo to initialize
144 * @fsz_type: fifo size type: 0-4KB, 1-8KB, 2-16KB, 3-32KB
145 * @reg_XXX: offsets of registers relative to base address
147 * 1K extra space is allocated at the end of the fifo to simplify
148 * processing of descriptors that wraps around fifo's end
150 * Returns 0 on success, negative value on failure
154 bdx_fifo_init(struct bdx_priv *priv, struct fifo *f, int fsz_type,
155 u16 reg_CFG0, u16 reg_CFG1, u16 reg_RPTR, u16 reg_WPTR)
157 u16 memsz = FIFO_SIZE * (1 << fsz_type);
159 memset(f, 0, sizeof(struct fifo));
160 /* pci_alloc_consistent gives us 4k-aligned memory */
161 f->va = pci_alloc_consistent(priv->pdev,
162 memsz + FIFO_EXTRA_SPACE, &f->da);
164 pr_err("pci_alloc_consistent failed\n");
167 f->reg_CFG0 = reg_CFG0;
168 f->reg_CFG1 = reg_CFG1;
169 f->reg_RPTR = reg_RPTR;
170 f->reg_WPTR = reg_WPTR;
174 f->size_mask = memsz - 1;
175 WRITE_REG(priv, reg_CFG0, (u32) ((f->da & TX_RX_CFG0_BASE) | fsz_type));
176 WRITE_REG(priv, reg_CFG1, H32_64(f->da));
182 * bdx_fifo_free - free all resources used by fifo
183 * @priv: NIC private structure
184 * @f: fifo to release
186 static void bdx_fifo_free(struct bdx_priv *priv, struct fifo *f)
190 pci_free_consistent(priv->pdev,
191 f->memsz + FIFO_EXTRA_SPACE, f->va, f->da);
198 * bdx_link_changed - notifies OS about hw link state.
199 * @priv: hw adapter structure
201 static void bdx_link_changed(struct bdx_priv *priv)
203 u32 link = READ_REG(priv, regMAC_LNK_STAT) & MAC_LINK_STAT;
206 if (netif_carrier_ok(priv->ndev)) {
207 netif_stop_queue(priv->ndev);
208 netif_carrier_off(priv->ndev);
209 netdev_err(priv->ndev, "Link Down\n");
212 if (!netif_carrier_ok(priv->ndev)) {
213 netif_wake_queue(priv->ndev);
214 netif_carrier_on(priv->ndev);
215 netdev_err(priv->ndev, "Link Up\n");
220 static void bdx_isr_extra(struct bdx_priv *priv, u32 isr)
222 if (isr & IR_RX_FREE_0) {
223 bdx_rx_alloc_skbs(priv, &priv->rxf_fifo0);
227 if (isr & IR_LNKCHG0)
228 bdx_link_changed(priv);
230 if (isr & IR_PCIE_LINK)
231 netdev_err(priv->ndev, "PCI-E Link Fault\n");
233 if (isr & IR_PCIE_TOUT)
234 netdev_err(priv->ndev, "PCI-E Time Out\n");
239 * bdx_isr_napi - Interrupt Service Routine for Bordeaux NIC
240 * @irq: interrupt number
241 * @dev: network device
243 * Return IRQ_NONE if it was not our interrupt, IRQ_HANDLED - otherwise
245 * It reads ISR register to know interrupt reasons, and proceed them one by one.
246 * Reasons of interest are:
247 * RX_DESC - new packet has arrived and RXD fifo holds its descriptor
248 * RX_FREE - number of free Rx buffers in RXF fifo gets low
249 * TX_FREE - packet was transmited and RXF fifo holds its descriptor
252 static irqreturn_t bdx_isr_napi(int irq, void *dev)
254 struct net_device *ndev = dev;
255 struct bdx_priv *priv = netdev_priv(ndev);
259 isr = (READ_REG(priv, regISR) & IR_RUN);
260 if (unlikely(!isr)) {
261 bdx_enable_interrupts(priv);
262 return IRQ_NONE; /* Not our interrupt */
266 bdx_isr_extra(priv, isr);
268 if (isr & (IR_RX_DESC_0 | IR_TX_FREE_0)) {
269 if (likely(napi_schedule_prep(&priv->napi))) {
270 __napi_schedule(&priv->napi);
273 /* NOTE: we get here if intr has slipped into window
274 * between these lines in bdx_poll:
275 * bdx_enable_interrupts(priv);
277 * currently intrs are disabled (since we read ISR),
278 * and we have failed to register next poll.
279 * so we read the regs to trigger chip
280 * and allow further interupts. */
281 READ_REG(priv, regTXF_WPTR_0);
282 READ_REG(priv, regRXD_WPTR_0);
286 bdx_enable_interrupts(priv);
290 static int bdx_poll(struct napi_struct *napi, int budget)
292 struct bdx_priv *priv = container_of(napi, struct bdx_priv, napi);
296 bdx_tx_cleanup(priv);
297 work_done = bdx_rx_receive(priv, &priv->rxd_fifo0, budget);
298 if ((work_done < budget) ||
299 (priv->napi_stop++ >= 30)) {
300 DBG("rx poll is done. backing to isr-driven\n");
302 /* from time to time we exit to let NAPI layer release
303 * device lock and allow waiting tasks (eg rmmod) to advance) */
307 bdx_enable_interrupts(priv);
313 * bdx_fw_load - loads firmware to NIC
314 * @priv: NIC private structure
316 * Firmware is loaded via TXD fifo, so it must be initialized first.
317 * Firware must be loaded once per NIC not per PCI device provided by NIC (NIC
318 * can have few of them). So all drivers use semaphore register to choose one
319 * that will actually load FW to NIC.
322 static int bdx_fw_load(struct bdx_priv *priv)
324 const struct firmware *fw = NULL;
329 master = READ_REG(priv, regINIT_SEMAPHORE);
330 if (!READ_REG(priv, regINIT_STATUS) && master) {
331 rc = request_firmware(&fw, "tehuti/bdx.bin", &priv->pdev->dev);
334 bdx_tx_push_desc_safe(priv, (char *)fw->data, fw->size);
337 for (i = 0; i < 200; i++) {
338 if (READ_REG(priv, regINIT_STATUS)) {
347 WRITE_REG(priv, regINIT_SEMAPHORE, 1);
349 release_firmware(fw);
352 netdev_err(priv->ndev, "firmware loading failed\n");
354 DBG("VPC = 0x%x VIC = 0x%x INIT_STATUS = 0x%x i=%d\n",
355 READ_REG(priv, regVPC),
356 READ_REG(priv, regVIC),
357 READ_REG(priv, regINIT_STATUS), i);
360 DBG("%s: firmware loading success\n", priv->ndev->name);
365 static void bdx_restore_mac(struct net_device *ndev, struct bdx_priv *priv)
370 DBG("mac0=%x mac1=%x mac2=%x\n",
371 READ_REG(priv, regUNC_MAC0_A),
372 READ_REG(priv, regUNC_MAC1_A), READ_REG(priv, regUNC_MAC2_A));
374 val = (ndev->dev_addr[0] << 8) | (ndev->dev_addr[1]);
375 WRITE_REG(priv, regUNC_MAC2_A, val);
376 val = (ndev->dev_addr[2] << 8) | (ndev->dev_addr[3]);
377 WRITE_REG(priv, regUNC_MAC1_A, val);
378 val = (ndev->dev_addr[4] << 8) | (ndev->dev_addr[5]);
379 WRITE_REG(priv, regUNC_MAC0_A, val);
381 DBG("mac0=%x mac1=%x mac2=%x\n",
382 READ_REG(priv, regUNC_MAC0_A),
383 READ_REG(priv, regUNC_MAC1_A), READ_REG(priv, regUNC_MAC2_A));
388 * bdx_hw_start - inits registers and starts HW's Rx and Tx engines
389 * @priv: NIC private structure
391 static int bdx_hw_start(struct bdx_priv *priv)
394 struct net_device *ndev = priv->ndev;
397 bdx_link_changed(priv);
399 /* 10G overall max length (vlan, eth&ip header, ip payload, crc) */
400 WRITE_REG(priv, regFRM_LENGTH, 0X3FE0);
401 WRITE_REG(priv, regPAUSE_QUANT, 0x96);
402 WRITE_REG(priv, regRX_FIFO_SECTION, 0x800010);
403 WRITE_REG(priv, regTX_FIFO_SECTION, 0xE00010);
404 WRITE_REG(priv, regRX_FULLNESS, 0);
405 WRITE_REG(priv, regTX_FULLNESS, 0);
406 WRITE_REG(priv, regCTRLST,
407 regCTRLST_BASE | regCTRLST_RX_ENA | regCTRLST_TX_ENA);
409 WRITE_REG(priv, regVGLB, 0);
410 WRITE_REG(priv, regMAX_FRAME_A,
411 priv->rxf_fifo0.m.pktsz & MAX_FRAME_AB_VAL);
413 DBG("RDINTCM=%08x\n", priv->rdintcm); /*NOTE: test script uses this */
414 WRITE_REG(priv, regRDINTCM0, priv->rdintcm);
415 WRITE_REG(priv, regRDINTCM2, 0); /*cpu_to_le32(rcm.val)); */
417 DBG("TDINTCM=%08x\n", priv->tdintcm); /*NOTE: test script uses this */
418 WRITE_REG(priv, regTDINTCM0, priv->tdintcm); /* old val = 0x300064 */
420 /* Enable timer interrupt once in 2 secs. */
421 /*WRITE_REG(priv, regGTMR0, ((GTMR_SEC * 2) & GTMR_DATA)); */
422 bdx_restore_mac(priv->ndev, priv);
424 WRITE_REG(priv, regGMAC_RXF_A, GMAC_RX_FILTER_OSEN |
425 GMAC_RX_FILTER_AM | GMAC_RX_FILTER_AB);
427 #define BDX_IRQ_TYPE ((priv->nic->irq_type == IRQ_MSI) ? 0 : IRQF_SHARED)
429 rc = request_irq(priv->pdev->irq, bdx_isr_napi, BDX_IRQ_TYPE,
433 bdx_enable_interrupts(priv);
441 static void bdx_hw_stop(struct bdx_priv *priv)
444 bdx_disable_interrupts(priv);
445 free_irq(priv->pdev->irq, priv->ndev);
447 netif_carrier_off(priv->ndev);
448 netif_stop_queue(priv->ndev);
453 static int bdx_hw_reset_direct(void __iomem *regs)
458 /* reset sequences: read, write 1, read, write 0 */
459 val = readl(regs + regCLKPLL);
460 writel((val | CLKPLL_SFTRST) + 0x8, regs + regCLKPLL);
462 val = readl(regs + regCLKPLL);
463 writel(val & ~CLKPLL_SFTRST, regs + regCLKPLL);
465 /* check that the PLLs are locked and reset ended */
466 for (i = 0; i < 70; i++, mdelay(10))
467 if ((readl(regs + regCLKPLL) & CLKPLL_LKD) == CLKPLL_LKD) {
468 /* do any PCI-E read transaction */
469 readl(regs + regRXD_CFG0_0);
472 pr_err("HW reset failed\n");
473 return 1; /* failure */
476 static int bdx_hw_reset(struct bdx_priv *priv)
481 if (priv->port == 0) {
482 /* reset sequences: read, write 1, read, write 0 */
483 val = READ_REG(priv, regCLKPLL);
484 WRITE_REG(priv, regCLKPLL, (val | CLKPLL_SFTRST) + 0x8);
486 val = READ_REG(priv, regCLKPLL);
487 WRITE_REG(priv, regCLKPLL, val & ~CLKPLL_SFTRST);
489 /* check that the PLLs are locked and reset ended */
490 for (i = 0; i < 70; i++, mdelay(10))
491 if ((READ_REG(priv, regCLKPLL) & CLKPLL_LKD) == CLKPLL_LKD) {
492 /* do any PCI-E read transaction */
493 READ_REG(priv, regRXD_CFG0_0);
496 pr_err("HW reset failed\n");
497 return 1; /* failure */
500 static int bdx_sw_reset(struct bdx_priv *priv)
505 /* 1. load MAC (obsolete) */
506 /* 2. disable Rx (and Tx) */
507 WRITE_REG(priv, regGMAC_RXF_A, 0);
509 /* 3. disable port */
510 WRITE_REG(priv, regDIS_PORT, 1);
511 /* 4. disable queue */
512 WRITE_REG(priv, regDIS_QU, 1);
513 /* 5. wait until hw is disabled */
514 for (i = 0; i < 50; i++) {
515 if (READ_REG(priv, regRST_PORT) & 1)
520 netdev_err(priv->ndev, "SW reset timeout. continuing anyway\n");
522 /* 6. disable intrs */
523 WRITE_REG(priv, regRDINTCM0, 0);
524 WRITE_REG(priv, regTDINTCM0, 0);
525 WRITE_REG(priv, regIMR, 0);
526 READ_REG(priv, regISR);
529 WRITE_REG(priv, regRST_QU, 1);
531 WRITE_REG(priv, regRST_PORT, 1);
532 /* 9. zero all read and write pointers */
533 for (i = regTXD_WPTR_0; i <= regTXF_RPTR_3; i += 0x10)
534 DBG("%x = %x\n", i, READ_REG(priv, i) & TXF_WPTR_WR_PTR);
535 for (i = regTXD_WPTR_0; i <= regTXF_RPTR_3; i += 0x10)
536 WRITE_REG(priv, i, 0);
537 /* 10. unseet port disable */
538 WRITE_REG(priv, regDIS_PORT, 0);
539 /* 11. unset queue disable */
540 WRITE_REG(priv, regDIS_QU, 0);
541 /* 12. unset queue reset */
542 WRITE_REG(priv, regRST_QU, 0);
543 /* 13. unset port reset */
544 WRITE_REG(priv, regRST_PORT, 0);
546 /* skiped. will be done later */
547 /* 15. save MAC (obsolete) */
548 for (i = regTXD_WPTR_0; i <= regTXF_RPTR_3; i += 0x10)
549 DBG("%x = %x\n", i, READ_REG(priv, i) & TXF_WPTR_WR_PTR);
554 /* bdx_reset - performs right type of reset depending on hw type */
555 static int bdx_reset(struct bdx_priv *priv)
558 RET((priv->pdev->device == 0x3009)
560 : bdx_sw_reset(priv));
564 * bdx_close - Disables a network interface
565 * @netdev: network interface device structure
567 * Returns 0, this is not allowed to fail
569 * The close entry point is called when an interface is de-activated
570 * by the OS. The hardware is still under the drivers control, but
571 * needs to be disabled. A global MAC reset is issued to stop the
572 * hardware, and all transmit and receive resources are freed.
574 static int bdx_close(struct net_device *ndev)
576 struct bdx_priv *priv = NULL;
579 priv = netdev_priv(ndev);
581 napi_disable(&priv->napi);
591 * bdx_open - Called when a network interface is made active
592 * @netdev: network interface device structure
594 * Returns 0 on success, negative value on failure
596 * The open entry point is called when a network interface is made
597 * active by the system (IFF_UP). At this point all resources needed
598 * for transmit and receive operations are allocated, the interrupt
599 * handler is registered with the OS, the watchdog timer is started,
600 * and the stack is notified that the interface is ready.
602 static int bdx_open(struct net_device *ndev)
604 struct bdx_priv *priv;
608 priv = netdev_priv(ndev);
610 if (netif_running(ndev))
611 netif_stop_queue(priv->ndev);
613 if ((rc = bdx_tx_init(priv)) ||
614 (rc = bdx_rx_init(priv)) ||
615 (rc = bdx_fw_load(priv)))
618 bdx_rx_alloc_skbs(priv, &priv->rxf_fifo0);
620 rc = bdx_hw_start(priv);
624 napi_enable(&priv->napi);
626 print_fw_id(priv->nic);
635 static int bdx_range_check(struct bdx_priv *priv, u32 offset)
637 return (offset > (u32) (BDX_REGS_SIZE / priv->nic->port_num)) ?
641 static int bdx_ioctl_priv(struct net_device *ndev, struct ifreq *ifr, int cmd)
643 struct bdx_priv *priv = netdev_priv(ndev);
649 DBG("jiffies=%ld cmd=%d\n", jiffies, cmd);
650 if (cmd != SIOCDEVPRIVATE) {
651 error = copy_from_user(data, ifr->ifr_data, sizeof(data));
653 pr_err("can't copy from user\n");
656 DBG("%d 0x%x 0x%x\n", data[0], data[1], data[2]);
659 if (!capable(CAP_SYS_RAWIO))
665 error = bdx_range_check(priv, data[1]);
668 data[2] = READ_REG(priv, data[1]);
669 DBG("read_reg(0x%x)=0x%x (dec %d)\n", data[1], data[2],
671 error = copy_to_user(ifr->ifr_data, data, sizeof(data));
677 error = bdx_range_check(priv, data[1]);
680 WRITE_REG(priv, data[1], data[2]);
681 DBG("write_reg(0x%x, 0x%x)\n", data[1], data[2]);
690 static int bdx_ioctl(struct net_device *ndev, struct ifreq *ifr, int cmd)
693 if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15))
694 RET(bdx_ioctl_priv(ndev, ifr, cmd));
700 * __bdx_vlan_rx_vid - private helper for adding/killing VLAN vid
701 * @ndev: network device
703 * @op: add or kill operation
705 * Passes VLAN filter table to hardware
707 static void __bdx_vlan_rx_vid(struct net_device *ndev, uint16_t vid, int enable)
709 struct bdx_priv *priv = netdev_priv(ndev);
713 DBG2("vid=%d value=%d\n", (int)vid, enable);
714 if (unlikely(vid >= 4096)) {
715 pr_err("invalid VID: %u (> 4096)\n", vid);
718 reg = regVLAN_0 + (vid / 32) * 4;
720 val = READ_REG(priv, reg);
721 DBG2("reg=%x, val=%x, bit=%d\n", reg, val, bit);
726 DBG2("new val %x\n", val);
727 WRITE_REG(priv, reg, val);
732 * bdx_vlan_rx_add_vid - kernel hook for adding VLAN vid to hw filtering table
733 * @ndev: network device
734 * @vid: VLAN vid to add
736 static int bdx_vlan_rx_add_vid(struct net_device *ndev, __be16 proto, u16 vid)
738 __bdx_vlan_rx_vid(ndev, vid, 1);
743 * bdx_vlan_rx_kill_vid - kernel hook for killing VLAN vid in hw filtering table
744 * @ndev: network device
745 * @vid: VLAN vid to kill
747 static int bdx_vlan_rx_kill_vid(struct net_device *ndev, __be16 proto, u16 vid)
749 __bdx_vlan_rx_vid(ndev, vid, 0);
754 * bdx_change_mtu - Change the Maximum Transfer Unit
755 * @netdev: network interface device structure
756 * @new_mtu: new value for maximum frame size
758 * Returns 0 on success, negative on failure
760 static int bdx_change_mtu(struct net_device *ndev, int new_mtu)
764 if (new_mtu == ndev->mtu)
767 /* enforce minimum frame size */
768 if (new_mtu < ETH_ZLEN) {
769 netdev_err(ndev, "mtu %d is less then minimal %d\n",
775 if (netif_running(ndev)) {
782 static void bdx_setmulti(struct net_device *ndev)
784 struct bdx_priv *priv = netdev_priv(ndev);
787 GMAC_RX_FILTER_AM | GMAC_RX_FILTER_AB | GMAC_RX_FILTER_OSEN;
791 /* IMF - imperfect (hash) rx multicat filter */
792 /* PMF - perfect rx multicat filter */
794 /* FIXME: RXE(OFF) */
795 if (ndev->flags & IFF_PROMISC) {
796 rxf_val |= GMAC_RX_FILTER_PRM;
797 } else if (ndev->flags & IFF_ALLMULTI) {
798 /* set IMF to accept all multicast frmaes */
799 for (i = 0; i < MAC_MCST_HASH_NUM; i++)
800 WRITE_REG(priv, regRX_MCST_HASH0 + i * 4, ~0);
801 } else if (!netdev_mc_empty(ndev)) {
803 struct netdev_hw_addr *ha;
806 /* set IMF to deny all multicast frames */
807 for (i = 0; i < MAC_MCST_HASH_NUM; i++)
808 WRITE_REG(priv, regRX_MCST_HASH0 + i * 4, 0);
809 /* set PMF to deny all multicast frames */
810 for (i = 0; i < MAC_MCST_NUM; i++) {
811 WRITE_REG(priv, regRX_MAC_MCST0 + i * 8, 0);
812 WRITE_REG(priv, regRX_MAC_MCST1 + i * 8, 0);
815 /* use PMF to accept first MAC_MCST_NUM (15) addresses */
816 /* TBD: sort addresses and write them in ascending order
817 * into RX_MAC_MCST regs. we skip this phase now and accept ALL
818 * multicast frames throu IMF */
819 /* accept the rest of addresses throu IMF */
820 netdev_for_each_mc_addr(ha, ndev) {
822 for (i = 0; i < ETH_ALEN; i++)
824 reg = regRX_MCST_HASH0 + ((hash >> 5) << 2);
825 val = READ_REG(priv, reg);
826 val |= (1 << (hash % 32));
827 WRITE_REG(priv, reg, val);
831 DBG("only own mac %d\n", netdev_mc_count(ndev));
832 rxf_val |= GMAC_RX_FILTER_AB;
834 WRITE_REG(priv, regGMAC_RXF_A, rxf_val);
840 static int bdx_set_mac(struct net_device *ndev, void *p)
842 struct bdx_priv *priv = netdev_priv(ndev);
843 struct sockaddr *addr = p;
847 if (netif_running(dev))
850 memcpy(ndev->dev_addr, addr->sa_data, ndev->addr_len);
851 bdx_restore_mac(ndev, priv);
855 static int bdx_read_mac(struct bdx_priv *priv)
857 u16 macAddress[3], i;
860 macAddress[2] = READ_REG(priv, regUNC_MAC0_A);
861 macAddress[2] = READ_REG(priv, regUNC_MAC0_A);
862 macAddress[1] = READ_REG(priv, regUNC_MAC1_A);
863 macAddress[1] = READ_REG(priv, regUNC_MAC1_A);
864 macAddress[0] = READ_REG(priv, regUNC_MAC2_A);
865 macAddress[0] = READ_REG(priv, regUNC_MAC2_A);
866 for (i = 0; i < 3; i++) {
867 priv->ndev->dev_addr[i * 2 + 1] = macAddress[i];
868 priv->ndev->dev_addr[i * 2] = macAddress[i] >> 8;
873 static u64 bdx_read_l2stat(struct bdx_priv *priv, int reg)
877 val = READ_REG(priv, reg);
878 val |= ((u64) READ_REG(priv, reg + 8)) << 32;
882 /*Do the statistics-update work*/
883 static void bdx_update_stats(struct bdx_priv *priv)
885 struct bdx_stats *stats = &priv->hw_stats;
886 u64 *stats_vector = (u64 *) stats;
890 /*Fill HW structure */
892 /*First 12 statistics - 0x7200 - 0x72B0 */
893 for (i = 0; i < 12; i++) {
894 stats_vector[i] = bdx_read_l2stat(priv, addr);
897 BDX_ASSERT(addr != 0x72C0);
898 /* 0x72C0-0x72E0 RSRV */
900 for (; i < 16; i++) {
901 stats_vector[i] = bdx_read_l2stat(priv, addr);
904 BDX_ASSERT(addr != 0x7330);
905 /* 0x7330-0x7360 RSRV */
907 for (; i < 19; i++) {
908 stats_vector[i] = bdx_read_l2stat(priv, addr);
911 BDX_ASSERT(addr != 0x73A0);
912 /* 0x73A0-0x73B0 RSRV */
914 for (; i < 23; i++) {
915 stats_vector[i] = bdx_read_l2stat(priv, addr);
918 BDX_ASSERT(addr != 0x7400);
919 BDX_ASSERT((sizeof(struct bdx_stats) / sizeof(u64)) != i);
922 static void print_rxdd(struct rxd_desc *rxdd, u32 rxd_val1, u16 len,
924 static void print_rxfd(struct rxf_desc *rxfd);
926 /*************************************************************************
928 *************************************************************************/
930 static void bdx_rxdb_destroy(struct rxdb *db)
935 static struct rxdb *bdx_rxdb_create(int nelem)
940 db = vmalloc(sizeof(struct rxdb)
941 + (nelem * sizeof(int))
942 + (nelem * sizeof(struct rx_map)));
943 if (likely(db != NULL)) {
944 db->stack = (int *)(db + 1);
945 db->elems = (void *)(db->stack + nelem);
948 for (i = 0; i < nelem; i++)
949 db->stack[i] = nelem - i - 1; /* to make first allocs
956 static inline int bdx_rxdb_alloc_elem(struct rxdb *db)
958 BDX_ASSERT(db->top <= 0);
959 return db->stack[--(db->top)];
962 static inline void *bdx_rxdb_addr_elem(struct rxdb *db, int n)
964 BDX_ASSERT((n < 0) || (n >= db->nelem));
965 return db->elems + n;
968 static inline int bdx_rxdb_available(struct rxdb *db)
973 static inline void bdx_rxdb_free_elem(struct rxdb *db, int n)
975 BDX_ASSERT((n >= db->nelem) || (n < 0));
976 db->stack[(db->top)++] = n;
979 /*************************************************************************
981 *************************************************************************/
984 * bdx_rx_init - initialize RX all related HW and SW resources
985 * @priv: NIC private structure
987 * Returns 0 on success, negative value on failure
989 * It creates rxf and rxd fifos, update relevant HW registers, preallocate
990 * skb for rx. It assumes that Rx is desabled in HW
991 * funcs are grouped for better cache usage
993 * RxD fifo is smaller than RxF fifo by design. Upon high load, RxD will be
994 * filled and packets will be dropped by nic without getting into host or
995 * cousing interrupt. Anyway, in that condition, host has no chance to process
996 * all packets, but dropping in nic is cheaper, since it takes 0 cpu cycles
999 /* TBD: ensure proper packet size */
1001 static int bdx_rx_init(struct bdx_priv *priv)
1005 if (bdx_fifo_init(priv, &priv->rxd_fifo0.m, priv->rxd_size,
1006 regRXD_CFG0_0, regRXD_CFG1_0,
1007 regRXD_RPTR_0, regRXD_WPTR_0))
1009 if (bdx_fifo_init(priv, &priv->rxf_fifo0.m, priv->rxf_size,
1010 regRXF_CFG0_0, regRXF_CFG1_0,
1011 regRXF_RPTR_0, regRXF_WPTR_0))
1013 priv->rxdb = bdx_rxdb_create(priv->rxf_fifo0.m.memsz /
1014 sizeof(struct rxf_desc));
1018 priv->rxf_fifo0.m.pktsz = priv->ndev->mtu + VLAN_ETH_HLEN;
1022 netdev_err(priv->ndev, "Rx init failed\n");
1027 * bdx_rx_free_skbs - frees and unmaps all skbs allocated for the fifo
1028 * @priv: NIC private structure
1031 static void bdx_rx_free_skbs(struct bdx_priv *priv, struct rxf_fifo *f)
1034 struct rxdb *db = priv->rxdb;
1038 DBG("total=%d free=%d busy=%d\n", db->nelem, bdx_rxdb_available(db),
1039 db->nelem - bdx_rxdb_available(db));
1040 while (bdx_rxdb_available(db) > 0) {
1041 i = bdx_rxdb_alloc_elem(db);
1042 dm = bdx_rxdb_addr_elem(db, i);
1045 for (i = 0; i < db->nelem; i++) {
1046 dm = bdx_rxdb_addr_elem(db, i);
1048 pci_unmap_single(priv->pdev,
1049 dm->dma, f->m.pktsz,
1050 PCI_DMA_FROMDEVICE);
1051 dev_kfree_skb(dm->skb);
1057 * bdx_rx_free - release all Rx resources
1058 * @priv: NIC private structure
1060 * It assumes that Rx is desabled in HW
1062 static void bdx_rx_free(struct bdx_priv *priv)
1066 bdx_rx_free_skbs(priv, &priv->rxf_fifo0);
1067 bdx_rxdb_destroy(priv->rxdb);
1070 bdx_fifo_free(priv, &priv->rxf_fifo0.m);
1071 bdx_fifo_free(priv, &priv->rxd_fifo0.m);
1076 /*************************************************************************
1078 *************************************************************************/
1081 * bdx_rx_alloc_skbs - fill rxf fifo with new skbs
1082 * @priv: nic's private structure
1083 * @f: RXF fifo that needs skbs
1085 * It allocates skbs, build rxf descs and push it (rxf descr) into rxf fifo.
1086 * skb's virtual and physical addresses are stored in skb db.
1087 * To calculate free space, func uses cached values of RPTR and WPTR
1088 * When needed, it also updates RPTR and WPTR.
1091 /* TBD: do not update WPTR if no desc were written */
1093 static void bdx_rx_alloc_skbs(struct bdx_priv *priv, struct rxf_fifo *f)
1095 struct sk_buff *skb;
1096 struct rxf_desc *rxfd;
1098 int dno, delta, idx;
1099 struct rxdb *db = priv->rxdb;
1102 dno = bdx_rxdb_available(db) - 1;
1104 skb = netdev_alloc_skb(priv->ndev, f->m.pktsz + NET_IP_ALIGN);
1108 skb_reserve(skb, NET_IP_ALIGN);
1110 idx = bdx_rxdb_alloc_elem(db);
1111 dm = bdx_rxdb_addr_elem(db, idx);
1112 dm->dma = pci_map_single(priv->pdev,
1113 skb->data, f->m.pktsz,
1114 PCI_DMA_FROMDEVICE);
1116 rxfd = (struct rxf_desc *)(f->m.va + f->m.wptr);
1117 rxfd->info = CPU_CHIP_SWAP32(0x10003); /* INFO=1 BC=3 */
1119 rxfd->pa_lo = CPU_CHIP_SWAP32(L32_64(dm->dma));
1120 rxfd->pa_hi = CPU_CHIP_SWAP32(H32_64(dm->dma));
1121 rxfd->len = CPU_CHIP_SWAP32(f->m.pktsz);
1124 f->m.wptr += sizeof(struct rxf_desc);
1125 delta = f->m.wptr - f->m.memsz;
1126 if (unlikely(delta >= 0)) {
1129 memcpy(f->m.va, f->m.va + f->m.memsz, delta);
1130 DBG("wrapped descriptor\n");
1135 /*TBD: to do - delayed rxf wptr like in txd */
1136 WRITE_REG(priv, f->m.reg_WPTR, f->m.wptr & TXF_WPTR_WR_PTR);
1141 NETIF_RX_MUX(struct bdx_priv *priv, u32 rxd_val1, u16 rxd_vlan,
1142 struct sk_buff *skb)
1145 DBG("rxdd->flags.bits.vtag=%d\n", GET_RXD_VTAG(rxd_val1));
1146 if (GET_RXD_VTAG(rxd_val1)) {
1147 DBG("%s: vlan rcv vlan '%x' vtag '%x'\n",
1149 GET_RXD_VLAN_ID(rxd_vlan),
1150 GET_RXD_VTAG(rxd_val1));
1151 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), GET_RXD_VLAN_TCI(rxd_vlan));
1153 netif_receive_skb(skb);
1156 static void bdx_recycle_skb(struct bdx_priv *priv, struct rxd_desc *rxdd)
1158 struct rxf_desc *rxfd;
1162 struct sk_buff *skb;
1166 DBG("priv=%p rxdd=%p\n", priv, rxdd);
1167 f = &priv->rxf_fifo0;
1169 DBG("db=%p f=%p\n", db, f);
1170 dm = bdx_rxdb_addr_elem(db, rxdd->va_lo);
1173 rxfd = (struct rxf_desc *)(f->m.va + f->m.wptr);
1174 rxfd->info = CPU_CHIP_SWAP32(0x10003); /* INFO=1 BC=3 */
1175 rxfd->va_lo = rxdd->va_lo;
1176 rxfd->pa_lo = CPU_CHIP_SWAP32(L32_64(dm->dma));
1177 rxfd->pa_hi = CPU_CHIP_SWAP32(H32_64(dm->dma));
1178 rxfd->len = CPU_CHIP_SWAP32(f->m.pktsz);
1181 f->m.wptr += sizeof(struct rxf_desc);
1182 delta = f->m.wptr - f->m.memsz;
1183 if (unlikely(delta >= 0)) {
1186 memcpy(f->m.va, f->m.va + f->m.memsz, delta);
1187 DBG("wrapped descriptor\n");
1194 * bdx_rx_receive - receives full packets from RXD fifo and pass them to OS
1195 * NOTE: a special treatment is given to non-continuous descriptors
1196 * that start near the end, wraps around and continue at the beginning. a second
1197 * part is copied right after the first, and then descriptor is interpreted as
1198 * normal. fifo has an extra space to allow such operations
1199 * @priv: nic's private structure
1200 * @f: RXF fifo that needs skbs
1201 * @budget: maximum number of packets to receive
1204 /* TBD: replace memcpy func call by explicite inline asm */
1206 static int bdx_rx_receive(struct bdx_priv *priv, struct rxd_fifo *f, int budget)
1208 struct net_device *ndev = priv->ndev;
1209 struct sk_buff *skb, *skb2;
1210 struct rxd_desc *rxdd;
1212 struct rxf_fifo *rxf_fifo;
1215 int max_done = BDX_MAX_RX_DONE;
1216 struct rxdb *db = NULL;
1217 /* Unmarshalled descriptor - copy of descriptor in host order */
1225 f->m.wptr = READ_REG(priv, f->m.reg_WPTR) & TXF_WPTR_WR_PTR;
1227 size = f->m.wptr - f->m.rptr;
1229 size = f->m.memsz + size; /* size is negative :-) */
1233 rxdd = (struct rxd_desc *)(f->m.va + f->m.rptr);
1234 rxd_val1 = CPU_CHIP_SWAP32(rxdd->rxd_val1);
1236 len = CPU_CHIP_SWAP16(rxdd->len);
1238 rxd_vlan = CPU_CHIP_SWAP16(rxdd->rxd_vlan);
1240 print_rxdd(rxdd, rxd_val1, len, rxd_vlan);
1242 tmp_len = GET_RXD_BC(rxd_val1) << 3;
1243 BDX_ASSERT(tmp_len <= 0);
1245 if (size < 0) /* test for partially arrived descriptor */
1248 f->m.rptr += tmp_len;
1250 tmp_len = f->m.rptr - f->m.memsz;
1251 if (unlikely(tmp_len >= 0)) {
1252 f->m.rptr = tmp_len;
1254 DBG("wrapped desc rptr=%d tmp_len=%d\n",
1255 f->m.rptr, tmp_len);
1256 memcpy(f->m.va + f->m.memsz, f->m.va, tmp_len);
1260 if (unlikely(GET_RXD_ERR(rxd_val1))) {
1261 DBG("rxd_err = 0x%x\n", GET_RXD_ERR(rxd_val1));
1262 ndev->stats.rx_errors++;
1263 bdx_recycle_skb(priv, rxdd);
1267 rxf_fifo = &priv->rxf_fifo0;
1269 dm = bdx_rxdb_addr_elem(db, rxdd->va_lo);
1272 if (len < BDX_COPYBREAK &&
1273 (skb2 = netdev_alloc_skb(priv->ndev, len + NET_IP_ALIGN))) {
1274 skb_reserve(skb2, NET_IP_ALIGN);
1275 /*skb_put(skb2, len); */
1276 pci_dma_sync_single_for_cpu(priv->pdev,
1277 dm->dma, rxf_fifo->m.pktsz,
1278 PCI_DMA_FROMDEVICE);
1279 memcpy(skb2->data, skb->data, len);
1280 bdx_recycle_skb(priv, rxdd);
1283 pci_unmap_single(priv->pdev,
1284 dm->dma, rxf_fifo->m.pktsz,
1285 PCI_DMA_FROMDEVICE);
1286 bdx_rxdb_free_elem(db, rxdd->va_lo);
1289 ndev->stats.rx_bytes += len;
1292 skb->protocol = eth_type_trans(skb, ndev);
1294 /* Non-IP packets aren't checksum-offloaded */
1295 if (GET_RXD_PKT_ID(rxd_val1) == 0)
1296 skb_checksum_none_assert(skb);
1298 skb->ip_summed = CHECKSUM_UNNECESSARY;
1300 NETIF_RX_MUX(priv, rxd_val1, rxd_vlan, skb);
1302 if (++done >= max_done)
1306 ndev->stats.rx_packets += done;
1308 /* FIXME: do smth to minimize pci accesses */
1309 WRITE_REG(priv, f->m.reg_RPTR, f->m.rptr & TXF_WPTR_WR_PTR);
1311 bdx_rx_alloc_skbs(priv, &priv->rxf_fifo0);
1316 /*************************************************************************
1317 * Debug / Temprorary Code *
1318 *************************************************************************/
1319 static void print_rxdd(struct rxd_desc *rxdd, u32 rxd_val1, u16 len,
1322 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",
1323 GET_RXD_BC(rxd_val1), GET_RXD_RXFQ(rxd_val1), GET_RXD_TO(rxd_val1),
1324 GET_RXD_TYPE(rxd_val1), GET_RXD_ERR(rxd_val1),
1325 GET_RXD_RXP(rxd_val1), GET_RXD_PKT_ID(rxd_val1),
1326 GET_RXD_VTAG(rxd_val1), len, GET_RXD_VLAN_ID(rxd_vlan),
1327 GET_RXD_CFI(rxd_vlan), GET_RXD_PRIO(rxd_vlan), rxdd->va_lo,
1331 static void print_rxfd(struct rxf_desc *rxfd)
1333 DBG("=== RxF desc CHIP ORDER/ENDIANNESS =============\n"
1334 "info 0x%x va_lo %u pa_lo 0x%x pa_hi 0x%x len 0x%x\n",
1335 rxfd->info, rxfd->va_lo, rxfd->pa_lo, rxfd->pa_hi, rxfd->len);
1339 * TX HW/SW interaction overview
1340 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1341 * There are 2 types of TX communication channels between driver and NIC.
1342 * 1) TX Free Fifo - TXF - holds ack descriptors for sent packets
1343 * 2) TX Data Fifo - TXD - holds descriptors of full buffers.
1345 * Currently NIC supports TSO, checksuming and gather DMA
1346 * UFO and IP fragmentation is on the way
1348 * RX SW Data Structures
1349 * ~~~~~~~~~~~~~~~~~~~~~
1350 * txdb - used to keep track of all skbs owned by SW and their dma addresses.
1351 * For TX case, ownership lasts from geting packet via hard_xmit and until HW
1352 * acknowledges sent by TXF descriptors.
1353 * Implemented as cyclic buffer.
1354 * fifo - keeps info about fifo's size and location, relevant HW registers,
1355 * usage and skb db. Each RXD and RXF Fifo has its own fifo structure.
1356 * Implemented as simple struct.
1358 * TX SW Execution Flow
1359 * ~~~~~~~~~~~~~~~~~~~~
1360 * OS calls driver's hard_xmit method with packet to sent.
1361 * Driver creates DMA mappings, builds TXD descriptors and kicks HW
1362 * by updating TXD WPTR.
1363 * When packet is sent, HW write us TXF descriptor and SW frees original skb.
1364 * To prevent TXD fifo overflow without reading HW registers every time,
1365 * SW deploys "tx level" technique.
1366 * Upon strart up, tx level is initialized to TXD fifo length.
1367 * For every sent packet, SW gets its TXD descriptor sizei
1368 * (from precalculated array) and substructs it from tx level.
1369 * The size is also stored in txdb. When TXF ack arrives, SW fetch size of
1370 * original TXD descriptor from txdb and adds it to tx level.
1371 * When Tx level drops under some predefined treshhold, the driver
1372 * stops the TX queue. When TX level rises above that level,
1373 * the tx queue is enabled again.
1375 * This technique avoids eccessive reading of RPTR and WPTR registers.
1376 * As our benchmarks shows, it adds 1.5 Gbit/sec to NIS's throuput.
1379 /*************************************************************************
1381 *************************************************************************/
1382 static inline int bdx_tx_db_size(struct txdb *db)
1384 int taken = db->wptr - db->rptr;
1386 taken = db->size + 1 + taken; /* (size + 1) equals memsz */
1388 return db->size - taken;
1392 * __bdx_tx_db_ptr_next - helper function, increment read/write pointer + wrap
1394 * @pptr: read or write pointer
1396 static inline void __bdx_tx_db_ptr_next(struct txdb *db, struct tx_map **pptr)
1398 BDX_ASSERT(db == NULL || pptr == NULL); /* sanity */
1400 BDX_ASSERT(*pptr != db->rptr && /* expect either read */
1401 *pptr != db->wptr); /* or write pointer */
1403 BDX_ASSERT(*pptr < db->start || /* pointer has to be */
1404 *pptr >= db->end); /* in range */
1407 if (unlikely(*pptr == db->end))
1412 * bdx_tx_db_inc_rptr - increment read pointer
1415 static inline void bdx_tx_db_inc_rptr(struct txdb *db)
1417 BDX_ASSERT(db->rptr == db->wptr); /* can't read from empty db */
1418 __bdx_tx_db_ptr_next(db, &db->rptr);
1422 * bdx_tx_db_inc_wptr - increment write pointer
1425 static inline void bdx_tx_db_inc_wptr(struct txdb *db)
1427 __bdx_tx_db_ptr_next(db, &db->wptr);
1428 BDX_ASSERT(db->rptr == db->wptr); /* we can not get empty db as
1429 a result of write */
1433 * bdx_tx_db_init - creates and initializes tx db
1435 * @sz_type: size of tx fifo
1437 * Returns 0 on success, error code otherwise
1439 static int bdx_tx_db_init(struct txdb *d, int sz_type)
1441 int memsz = FIFO_SIZE * (1 << (sz_type + 1));
1443 d->start = vmalloc(memsz);
1448 * In order to differentiate between db is empty and db is full
1449 * states at least one element should always be empty in order to
1450 * avoid rptr == wptr which means db is empty
1452 d->size = memsz / sizeof(struct tx_map) - 1;
1453 d->end = d->start + d->size + 1; /* just after last element */
1455 /* all dbs are created equally empty */
1463 * bdx_tx_db_close - closes tx db and frees all memory
1466 static void bdx_tx_db_close(struct txdb *d)
1468 BDX_ASSERT(d == NULL);
1474 /*************************************************************************
1476 *************************************************************************/
1478 /* sizes of tx desc (including padding if needed) as function
1479 * of skb's frag number */
1482 u16 qwords; /* qword = 64 bit */
1483 } txd_sizes[MAX_SKB_FRAGS + 1];
1486 * bdx_tx_map_skb - creates and stores dma mappings for skb's data blocks
1487 * @priv: NIC private structure
1488 * @skb: socket buffer to map
1489 * @txdd: TX descriptor to use
1491 * It makes dma mappings for skb's data blocks and writes them to PBL of
1492 * new tx descriptor. It also stores them in the tx db, so they could be
1493 * unmaped after data was sent. It is reponsibility of a caller to make
1494 * sure that there is enough space in the tx db. Last element holds pointer
1495 * to skb itself and marked with zero length
1498 bdx_tx_map_skb(struct bdx_priv *priv, struct sk_buff *skb,
1499 struct txd_desc *txdd)
1501 struct txdb *db = &priv->txdb;
1502 struct pbl *pbl = &txdd->pbl[0];
1503 int nr_frags = skb_shinfo(skb)->nr_frags;
1506 db->wptr->len = skb_headlen(skb);
1507 db->wptr->addr.dma = pci_map_single(priv->pdev, skb->data,
1508 db->wptr->len, PCI_DMA_TODEVICE);
1509 pbl->len = CPU_CHIP_SWAP32(db->wptr->len);
1510 pbl->pa_lo = CPU_CHIP_SWAP32(L32_64(db->wptr->addr.dma));
1511 pbl->pa_hi = CPU_CHIP_SWAP32(H32_64(db->wptr->addr.dma));
1512 DBG("=== pbl len: 0x%x ================\n", pbl->len);
1513 DBG("=== pbl pa_lo: 0x%x ================\n", pbl->pa_lo);
1514 DBG("=== pbl pa_hi: 0x%x ================\n", pbl->pa_hi);
1515 bdx_tx_db_inc_wptr(db);
1517 for (i = 0; i < nr_frags; i++) {
1518 const struct skb_frag_struct *frag;
1520 frag = &skb_shinfo(skb)->frags[i];
1521 db->wptr->len = skb_frag_size(frag);
1522 db->wptr->addr.dma = skb_frag_dma_map(&priv->pdev->dev, frag,
1523 0, skb_frag_size(frag),
1527 pbl->len = CPU_CHIP_SWAP32(db->wptr->len);
1528 pbl->pa_lo = CPU_CHIP_SWAP32(L32_64(db->wptr->addr.dma));
1529 pbl->pa_hi = CPU_CHIP_SWAP32(H32_64(db->wptr->addr.dma));
1530 bdx_tx_db_inc_wptr(db);
1533 /* add skb clean up info. */
1534 db->wptr->len = -txd_sizes[nr_frags].bytes;
1535 db->wptr->addr.skb = skb;
1536 bdx_tx_db_inc_wptr(db);
1539 /* init_txd_sizes - precalculate sizes of descriptors for skbs up to 16 frags
1540 * number of frags is used as index to fetch correct descriptors size,
1541 * instead of calculating it each time */
1542 static void __init init_txd_sizes(void)
1546 /* 7 - is number of lwords in txd with one phys buffer
1547 * 3 - is number of lwords used for every additional phys buffer */
1548 for (i = 0; i < MAX_SKB_FRAGS + 1; i++) {
1549 lwords = 7 + (i * 3);
1551 lwords++; /* pad it with 1 lword */
1552 txd_sizes[i].qwords = lwords >> 1;
1553 txd_sizes[i].bytes = lwords << 2;
1557 /* bdx_tx_init - initialize all Tx related stuff.
1558 * Namely, TXD and TXF fifos, database etc */
1559 static int bdx_tx_init(struct bdx_priv *priv)
1561 if (bdx_fifo_init(priv, &priv->txd_fifo0.m, priv->txd_size,
1563 regTXD_CFG1_0, regTXD_RPTR_0, regTXD_WPTR_0))
1565 if (bdx_fifo_init(priv, &priv->txf_fifo0.m, priv->txf_size,
1567 regTXF_CFG1_0, regTXF_RPTR_0, regTXF_WPTR_0))
1570 /* The TX db has to keep mappings for all packets sent (on TxD)
1571 * and not yet reclaimed (on TxF) */
1572 if (bdx_tx_db_init(&priv->txdb, max(priv->txd_size, priv->txf_size)))
1575 priv->tx_level = BDX_MAX_TX_LEVEL;
1576 #ifdef BDX_DELAY_WPTR
1577 priv->tx_update_mark = priv->tx_level - 1024;
1582 netdev_err(priv->ndev, "Tx init failed\n");
1587 * bdx_tx_space - calculates available space in TX fifo
1588 * @priv: NIC private structure
1590 * Returns available space in TX fifo in bytes
1592 static inline int bdx_tx_space(struct bdx_priv *priv)
1594 struct txd_fifo *f = &priv->txd_fifo0;
1597 f->m.rptr = READ_REG(priv, f->m.reg_RPTR) & TXF_WPTR_WR_PTR;
1598 fsize = f->m.rptr - f->m.wptr;
1600 fsize = f->m.memsz + fsize;
1605 * bdx_tx_transmit - send packet to NIC
1606 * @skb: packet to send
1607 * @ndev: network device assigned to NIC
1609 * o NETDEV_TX_OK everything ok.
1610 * o NETDEV_TX_BUSY Cannot transmit packet, try later
1611 * Usually a bug, means queue start/stop flow control is broken in
1612 * the driver. Note: the driver must NOT put the skb in its DMA ring.
1614 static netdev_tx_t bdx_tx_transmit(struct sk_buff *skb,
1615 struct net_device *ndev)
1617 struct bdx_priv *priv = netdev_priv(ndev);
1618 struct txd_fifo *f = &priv->txd_fifo0;
1619 int txd_checksum = 7; /* full checksum */
1621 int txd_vlan_id = 0;
1625 int nr_frags = skb_shinfo(skb)->nr_frags;
1626 struct txd_desc *txdd;
1628 unsigned long flags;
1631 local_irq_save(flags);
1632 spin_lock(&priv->tx_lock);
1634 /* build tx descriptor */
1635 BDX_ASSERT(f->m.wptr >= f->m.memsz); /* started with valid wptr */
1636 txdd = (struct txd_desc *)(f->m.va + f->m.wptr);
1637 if (unlikely(skb->ip_summed != CHECKSUM_PARTIAL))
1640 if (skb_shinfo(skb)->gso_size) {
1641 txd_mss = skb_shinfo(skb)->gso_size;
1643 DBG("skb %p skb len %d gso size = %d\n", skb, skb->len,
1647 if (skb_vlan_tag_present(skb)) {
1648 /*Cut VLAN ID to 12 bits */
1649 txd_vlan_id = skb_vlan_tag_get(skb) & BITS_MASK(12);
1653 txdd->length = CPU_CHIP_SWAP16(skb->len);
1654 txdd->mss = CPU_CHIP_SWAP16(txd_mss);
1656 CPU_CHIP_SWAP32(TXD_W1_VAL
1657 (txd_sizes[nr_frags].qwords, txd_checksum, txd_vtag,
1658 txd_lgsnd, txd_vlan_id));
1659 DBG("=== TxD desc =====================\n");
1660 DBG("=== w1: 0x%x ================\n", txdd->txd_val1);
1661 DBG("=== w2: mss 0x%x len 0x%x\n", txdd->mss, txdd->length);
1663 bdx_tx_map_skb(priv, skb, txdd);
1665 /* increment TXD write pointer. In case of
1666 fifo wrapping copy reminder of the descriptor
1668 f->m.wptr += txd_sizes[nr_frags].bytes;
1669 len = f->m.wptr - f->m.memsz;
1670 if (unlikely(len >= 0)) {
1673 BDX_ASSERT(len > f->m.memsz);
1674 memcpy(f->m.va, f->m.va + f->m.memsz, len);
1677 BDX_ASSERT(f->m.wptr >= f->m.memsz); /* finished with valid wptr */
1679 priv->tx_level -= txd_sizes[nr_frags].bytes;
1680 BDX_ASSERT(priv->tx_level <= 0 || priv->tx_level > BDX_MAX_TX_LEVEL);
1681 #ifdef BDX_DELAY_WPTR
1682 if (priv->tx_level > priv->tx_update_mark) {
1683 /* Force memory writes to complete before letting h/w
1684 know there are new descriptors to fetch.
1685 (might be needed on platforms like IA64)
1687 WRITE_REG(priv, f->m.reg_WPTR, f->m.wptr & TXF_WPTR_WR_PTR);
1689 if (priv->tx_noupd++ > BDX_NO_UPD_PACKETS) {
1691 WRITE_REG(priv, f->m.reg_WPTR,
1692 f->m.wptr & TXF_WPTR_WR_PTR);
1696 /* Force memory writes to complete before letting h/w
1697 know there are new descriptors to fetch.
1698 (might be needed on platforms like IA64)
1700 WRITE_REG(priv, f->m.reg_WPTR, f->m.wptr & TXF_WPTR_WR_PTR);
1704 netif_trans_update(ndev); /* NETIF_F_LLTX driver :( */
1706 ndev->stats.tx_packets++;
1707 ndev->stats.tx_bytes += skb->len;
1709 if (priv->tx_level < BDX_MIN_TX_LEVEL) {
1710 DBG("%s: %s: TX Q STOP level %d\n",
1711 BDX_DRV_NAME, ndev->name, priv->tx_level);
1712 netif_stop_queue(ndev);
1715 spin_unlock_irqrestore(&priv->tx_lock, flags);
1716 return NETDEV_TX_OK;
1720 * bdx_tx_cleanup - clean TXF fifo, run in the context of IRQ.
1721 * @priv: bdx adapter
1723 * It scans TXF fifo for descriptors, frees DMA mappings and reports to OS
1724 * that those packets were sent
1726 static void bdx_tx_cleanup(struct bdx_priv *priv)
1728 struct txf_fifo *f = &priv->txf_fifo0;
1729 struct txdb *db = &priv->txdb;
1733 f->m.wptr = READ_REG(priv, f->m.reg_WPTR) & TXF_WPTR_MASK;
1734 BDX_ASSERT(f->m.rptr >= f->m.memsz); /* started with valid rptr */
1736 while (f->m.wptr != f->m.rptr) {
1737 f->m.rptr += BDX_TXF_DESC_SZ;
1738 f->m.rptr &= f->m.size_mask;
1740 /* unmap all the fragments */
1741 /* first has to come tx_maps containing dma */
1742 BDX_ASSERT(db->rptr->len == 0);
1744 BDX_ASSERT(db->rptr->addr.dma == 0);
1745 pci_unmap_page(priv->pdev, db->rptr->addr.dma,
1746 db->rptr->len, PCI_DMA_TODEVICE);
1747 bdx_tx_db_inc_rptr(db);
1748 } while (db->rptr->len > 0);
1749 tx_level -= db->rptr->len; /* '-' koz len is negative */
1751 /* now should come skb pointer - free it */
1752 dev_kfree_skb_irq(db->rptr->addr.skb);
1753 bdx_tx_db_inc_rptr(db);
1756 /* let h/w know which TXF descriptors were cleaned */
1757 BDX_ASSERT((f->m.wptr & TXF_WPTR_WR_PTR) >= f->m.memsz);
1758 WRITE_REG(priv, f->m.reg_RPTR, f->m.rptr & TXF_WPTR_WR_PTR);
1760 /* We reclaimed resources, so in case the Q is stopped by xmit callback,
1761 * we resume the transmission and use tx_lock to synchronize with xmit.*/
1762 spin_lock(&priv->tx_lock);
1763 priv->tx_level += tx_level;
1764 BDX_ASSERT(priv->tx_level <= 0 || priv->tx_level > BDX_MAX_TX_LEVEL);
1765 #ifdef BDX_DELAY_WPTR
1766 if (priv->tx_noupd) {
1768 WRITE_REG(priv, priv->txd_fifo0.m.reg_WPTR,
1769 priv->txd_fifo0.m.wptr & TXF_WPTR_WR_PTR);
1773 if (unlikely(netif_queue_stopped(priv->ndev) &&
1774 netif_carrier_ok(priv->ndev) &&
1775 (priv->tx_level >= BDX_MIN_TX_LEVEL))) {
1776 DBG("%s: %s: TX Q WAKE level %d\n",
1777 BDX_DRV_NAME, priv->ndev->name, priv->tx_level);
1778 netif_wake_queue(priv->ndev);
1780 spin_unlock(&priv->tx_lock);
1784 * bdx_tx_free_skbs - frees all skbs from TXD fifo.
1785 * It gets called when OS stops this dev, eg upon "ifconfig down" or rmmod
1787 static void bdx_tx_free_skbs(struct bdx_priv *priv)
1789 struct txdb *db = &priv->txdb;
1792 while (db->rptr != db->wptr) {
1793 if (likely(db->rptr->len))
1794 pci_unmap_page(priv->pdev, db->rptr->addr.dma,
1795 db->rptr->len, PCI_DMA_TODEVICE);
1797 dev_kfree_skb(db->rptr->addr.skb);
1798 bdx_tx_db_inc_rptr(db);
1803 /* bdx_tx_free - frees all Tx resources */
1804 static void bdx_tx_free(struct bdx_priv *priv)
1807 bdx_tx_free_skbs(priv);
1808 bdx_fifo_free(priv, &priv->txd_fifo0.m);
1809 bdx_fifo_free(priv, &priv->txf_fifo0.m);
1810 bdx_tx_db_close(&priv->txdb);
1814 * bdx_tx_push_desc - push descriptor to TxD fifo
1815 * @priv: NIC private structure
1816 * @data: desc's data
1817 * @size: desc's size
1819 * Pushes desc to TxD fifo and overlaps it if needed.
1820 * NOTE: this func does not check for available space. this is responsibility
1821 * of the caller. Neither does it check that data size is smaller than
1824 static void bdx_tx_push_desc(struct bdx_priv *priv, void *data, int size)
1826 struct txd_fifo *f = &priv->txd_fifo0;
1827 int i = f->m.memsz - f->m.wptr;
1833 memcpy(f->m.va + f->m.wptr, data, size);
1836 memcpy(f->m.va + f->m.wptr, data, i);
1837 f->m.wptr = size - i;
1838 memcpy(f->m.va, data + i, f->m.wptr);
1840 WRITE_REG(priv, f->m.reg_WPTR, f->m.wptr & TXF_WPTR_WR_PTR);
1844 * bdx_tx_push_desc_safe - push descriptor to TxD fifo in a safe way
1845 * @priv: NIC private structure
1846 * @data: desc's data
1847 * @size: desc's size
1849 * NOTE: this func does check for available space and, if necessary, waits for
1850 * NIC to read existing data before writing new one.
1852 static void bdx_tx_push_desc_safe(struct bdx_priv *priv, void *data, int size)
1858 /* we substruct 8 because when fifo is full rptr == wptr
1859 which also means that fifo is empty, we can understand
1860 the difference, but could hw do the same ??? :) */
1861 int avail = bdx_tx_space(priv) - 8;
1863 if (timer++ > 300) { /* prevent endless loop */
1864 DBG("timeout while writing desc to TxD fifo\n");
1867 udelay(50); /* give hw a chance to clean fifo */
1870 avail = min(avail, size);
1871 DBG("about to push %d bytes starting %p size %d\n", avail,
1873 bdx_tx_push_desc(priv, data, avail);
1880 static const struct net_device_ops bdx_netdev_ops = {
1881 .ndo_open = bdx_open,
1882 .ndo_stop = bdx_close,
1883 .ndo_start_xmit = bdx_tx_transmit,
1884 .ndo_validate_addr = eth_validate_addr,
1885 .ndo_do_ioctl = bdx_ioctl,
1886 .ndo_set_rx_mode = bdx_setmulti,
1887 .ndo_change_mtu = bdx_change_mtu,
1888 .ndo_set_mac_address = bdx_set_mac,
1889 .ndo_vlan_rx_add_vid = bdx_vlan_rx_add_vid,
1890 .ndo_vlan_rx_kill_vid = bdx_vlan_rx_kill_vid,
1894 * bdx_probe - Device Initialization Routine
1895 * @pdev: PCI device information struct
1896 * @ent: entry in bdx_pci_tbl
1898 * Returns 0 on success, negative on failure
1900 * bdx_probe initializes an adapter identified by a pci_dev structure.
1901 * The OS initialization, configuring of the adapter private structure,
1902 * and a hardware reset occur.
1904 * functions and their order used as explained in
1905 * /usr/src/linux/Documentation/DMA-{API,mapping}.txt
1909 /* TBD: netif_msg should be checked and implemented. I disable it for now */
1911 bdx_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1913 struct net_device *ndev;
1914 struct bdx_priv *priv;
1915 int err, pci_using_dac, port;
1916 unsigned long pciaddr;
1918 struct pci_nic *nic;
1922 nic = vmalloc(sizeof(*nic));
1926 /************** pci *****************/
1927 err = pci_enable_device(pdev);
1928 if (err) /* it triggers interrupt, dunno why. */
1929 goto err_pci; /* it's not a problem though */
1931 if (!(err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) &&
1932 !(err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)))) {
1935 if ((err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) ||
1936 (err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)))) {
1937 pr_err("No usable DMA configuration, aborting\n");
1943 err = pci_request_regions(pdev, BDX_DRV_NAME);
1947 pci_set_master(pdev);
1949 pciaddr = pci_resource_start(pdev, 0);
1952 pr_err("no MMIO resource\n");
1955 regionSize = pci_resource_len(pdev, 0);
1956 if (regionSize < BDX_REGS_SIZE) {
1958 pr_err("MMIO resource (%x) too small\n", regionSize);
1962 nic->regs = ioremap(pciaddr, regionSize);
1965 pr_err("ioremap failed\n");
1969 if (pdev->irq < 2) {
1971 pr_err("invalid irq (%d)\n", pdev->irq);
1974 pci_set_drvdata(pdev, nic);
1976 if (pdev->device == 0x3014)
1983 bdx_hw_reset_direct(nic->regs);
1985 nic->irq_type = IRQ_INTX;
1987 if ((readl(nic->regs + FPGA_VER) & 0xFFF) >= 378) {
1988 err = pci_enable_msi(pdev);
1990 pr_err("Can't enable msi. error is %d\n", err);
1992 nic->irq_type = IRQ_MSI;
1994 DBG("HW does not support MSI\n");
1997 /************** netdev **************/
1998 for (port = 0; port < nic->port_num; port++) {
1999 ndev = alloc_etherdev(sizeof(struct bdx_priv));
2005 ndev->netdev_ops = &bdx_netdev_ops;
2006 ndev->tx_queue_len = BDX_NDEV_TXQ_LEN;
2008 bdx_set_ethtool_ops(ndev); /* ethtool interface */
2010 /* these fields are used for info purposes only
2011 * so we can have them same for all ports of the board */
2012 ndev->if_port = port;
2013 ndev->features = NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_TSO
2014 | NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
2015 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM
2017 ndev->hw_features = NETIF_F_IP_CSUM | NETIF_F_SG |
2018 NETIF_F_TSO | NETIF_F_HW_VLAN_CTAG_TX;
2021 ndev->features |= NETIF_F_HIGHDMA;
2023 /************** priv ****************/
2024 priv = nic->priv[port] = netdev_priv(ndev);
2026 priv->pBdxRegs = nic->regs + port * 0x8000;
2031 priv->msg_enable = BDX_DEF_MSG_ENABLE;
2033 netif_napi_add(ndev, &priv->napi, bdx_poll, 64);
2035 if ((readl(nic->regs + FPGA_VER) & 0xFFF) == 308) {
2036 DBG("HW statistics not supported\n");
2037 priv->stats_flag = 0;
2039 priv->stats_flag = 1;
2042 /* Initialize fifo sizes. */
2048 /* Initialize the initial coalescing registers. */
2049 priv->rdintcm = INT_REG_VAL(0x20, 1, 4, 12);
2050 priv->tdintcm = INT_REG_VAL(0x20, 1, 0, 12);
2052 /* ndev->xmit_lock spinlock is not used.
2053 * Private priv->tx_lock is used for synchronization
2054 * between transmit and TX irq cleanup. In addition
2055 * set multicast list callback has to use priv->tx_lock.
2058 ndev->features |= NETIF_F_LLTX;
2060 spin_lock_init(&priv->tx_lock);
2062 /*bdx_hw_reset(priv); */
2063 if (bdx_read_mac(priv)) {
2064 pr_err("load MAC address failed\n");
2067 SET_NETDEV_DEV(ndev, &pdev->dev);
2068 err = register_netdev(ndev);
2070 pr_err("register_netdev failed\n");
2073 netif_carrier_off(ndev);
2074 netif_stop_queue(ndev);
2085 pci_release_regions(pdev);
2087 pci_disable_device(pdev);
2094 /****************** Ethtool interface *********************/
2095 /* get strings for statistics counters */
2097 bdx_stat_names[][ETH_GSTRING_LEN] = {
2098 "InUCast", /* 0x7200 */
2099 "InMCast", /* 0x7210 */
2100 "InBCast", /* 0x7220 */
2101 "InPkts", /* 0x7230 */
2102 "InErrors", /* 0x7240 */
2103 "InDropped", /* 0x7250 */
2104 "FrameTooLong", /* 0x7260 */
2105 "FrameSequenceErrors", /* 0x7270 */
2106 "InVLAN", /* 0x7280 */
2107 "InDroppedDFE", /* 0x7290 */
2108 "InDroppedIntFull", /* 0x72A0 */
2109 "InFrameAlignErrors", /* 0x72B0 */
2111 /* 0x72C0-0x72E0 RSRV */
2113 "OutUCast", /* 0x72F0 */
2114 "OutMCast", /* 0x7300 */
2115 "OutBCast", /* 0x7310 */
2116 "OutPkts", /* 0x7320 */
2118 /* 0x7330-0x7360 RSRV */
2120 "OutVLAN", /* 0x7370 */
2121 "InUCastOctects", /* 0x7380 */
2122 "OutUCastOctects", /* 0x7390 */
2124 /* 0x73A0-0x73B0 RSRV */
2126 "InBCastOctects", /* 0x73C0 */
2127 "OutBCastOctects", /* 0x73D0 */
2128 "InOctects", /* 0x73E0 */
2129 "OutOctects", /* 0x73F0 */
2133 * bdx_get_settings - get device-specific settings
2137 static int bdx_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
2141 struct bdx_priv *priv = netdev_priv(netdev);
2143 rdintcm = priv->rdintcm;
2144 tdintcm = priv->tdintcm;
2146 ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
2147 ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE);
2148 ethtool_cmd_speed_set(ecmd, SPEED_10000);
2149 ecmd->duplex = DUPLEX_FULL;
2150 ecmd->port = PORT_FIBRE;
2151 ecmd->transceiver = XCVR_EXTERNAL; /* what does it mean? */
2152 ecmd->autoneg = AUTONEG_DISABLE;
2154 /* PCK_TH measures in multiples of FIFO bytes
2155 We translate to packets */
2157 ((GET_PCK_TH(tdintcm) * PCK_TH_MULT) / BDX_TXF_DESC_SZ);
2159 ((GET_PCK_TH(rdintcm) * PCK_TH_MULT) / sizeof(struct rxf_desc));
2165 * bdx_get_drvinfo - report driver information
2170 bdx_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *drvinfo)
2172 struct bdx_priv *priv = netdev_priv(netdev);
2174 strlcpy(drvinfo->driver, BDX_DRV_NAME, sizeof(drvinfo->driver));
2175 strlcpy(drvinfo->version, BDX_DRV_VERSION, sizeof(drvinfo->version));
2176 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
2177 strlcpy(drvinfo->bus_info, pci_name(priv->pdev),
2178 sizeof(drvinfo->bus_info));
2182 * bdx_get_coalesce - get interrupt coalescing parameters
2187 bdx_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *ecoal)
2191 struct bdx_priv *priv = netdev_priv(netdev);
2193 rdintcm = priv->rdintcm;
2194 tdintcm = priv->tdintcm;
2196 /* PCK_TH measures in multiples of FIFO bytes
2197 We translate to packets */
2198 ecoal->rx_coalesce_usecs = GET_INT_COAL(rdintcm) * INT_COAL_MULT;
2199 ecoal->rx_max_coalesced_frames =
2200 ((GET_PCK_TH(rdintcm) * PCK_TH_MULT) / sizeof(struct rxf_desc));
2202 ecoal->tx_coalesce_usecs = GET_INT_COAL(tdintcm) * INT_COAL_MULT;
2203 ecoal->tx_max_coalesced_frames =
2204 ((GET_PCK_TH(tdintcm) * PCK_TH_MULT) / BDX_TXF_DESC_SZ);
2206 /* adaptive parameters ignored */
2211 * bdx_set_coalesce - set interrupt coalescing parameters
2216 bdx_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *ecoal)
2220 struct bdx_priv *priv = netdev_priv(netdev);
2226 /* Check for valid input */
2227 rx_coal = ecoal->rx_coalesce_usecs / INT_COAL_MULT;
2228 tx_coal = ecoal->tx_coalesce_usecs / INT_COAL_MULT;
2229 rx_max_coal = ecoal->rx_max_coalesced_frames;
2230 tx_max_coal = ecoal->tx_max_coalesced_frames;
2232 /* Translate from packets to multiples of FIFO bytes */
2234 (((rx_max_coal * sizeof(struct rxf_desc)) + PCK_TH_MULT - 1)
2237 (((tx_max_coal * BDX_TXF_DESC_SZ) + PCK_TH_MULT - 1)
2240 if ((rx_coal > 0x7FFF) || (tx_coal > 0x7FFF) ||
2241 (rx_max_coal > 0xF) || (tx_max_coal > 0xF))
2244 rdintcm = INT_REG_VAL(rx_coal, GET_INT_COAL_RC(priv->rdintcm),
2245 GET_RXF_TH(priv->rdintcm), rx_max_coal);
2246 tdintcm = INT_REG_VAL(tx_coal, GET_INT_COAL_RC(priv->tdintcm), 0,
2249 priv->rdintcm = rdintcm;
2250 priv->tdintcm = tdintcm;
2252 WRITE_REG(priv, regRDINTCM0, rdintcm);
2253 WRITE_REG(priv, regTDINTCM0, tdintcm);
2258 /* Convert RX fifo size to number of pending packets */
2259 static inline int bdx_rx_fifo_size_to_packets(int rx_size)
2261 return (FIFO_SIZE * (1 << rx_size)) / sizeof(struct rxf_desc);
2264 /* Convert TX fifo size to number of pending packets */
2265 static inline int bdx_tx_fifo_size_to_packets(int tx_size)
2267 return (FIFO_SIZE * (1 << tx_size)) / BDX_TXF_DESC_SZ;
2271 * bdx_get_ringparam - report ring sizes
2276 bdx_get_ringparam(struct net_device *netdev, struct ethtool_ringparam *ring)
2278 struct bdx_priv *priv = netdev_priv(netdev);
2280 /*max_pending - the maximum-sized FIFO we allow */
2281 ring->rx_max_pending = bdx_rx_fifo_size_to_packets(3);
2282 ring->tx_max_pending = bdx_tx_fifo_size_to_packets(3);
2283 ring->rx_pending = bdx_rx_fifo_size_to_packets(priv->rxf_size);
2284 ring->tx_pending = bdx_tx_fifo_size_to_packets(priv->txd_size);
2288 * bdx_set_ringparam - set ring sizes
2293 bdx_set_ringparam(struct net_device *netdev, struct ethtool_ringparam *ring)
2295 struct bdx_priv *priv = netdev_priv(netdev);
2299 for (; rx_size < 4; rx_size++) {
2300 if (bdx_rx_fifo_size_to_packets(rx_size) >= ring->rx_pending)
2306 for (; tx_size < 4; tx_size++) {
2307 if (bdx_tx_fifo_size_to_packets(tx_size) >= ring->tx_pending)
2313 /*Is there anything to do? */
2314 if ((rx_size == priv->rxf_size) &&
2315 (tx_size == priv->txd_size))
2318 priv->rxf_size = rx_size;
2320 priv->rxd_size = rx_size - 1;
2322 priv->rxd_size = rx_size;
2324 priv->txf_size = priv->txd_size = tx_size;
2326 if (netif_running(netdev)) {
2334 * bdx_get_strings - return a set of strings that describe the requested objects
2338 static void bdx_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
2340 switch (stringset) {
2342 memcpy(data, *bdx_stat_names, sizeof(bdx_stat_names));
2348 * bdx_get_sset_count - return number of statistics or tests
2351 static int bdx_get_sset_count(struct net_device *netdev, int stringset)
2353 struct bdx_priv *priv = netdev_priv(netdev);
2355 switch (stringset) {
2357 BDX_ASSERT(ARRAY_SIZE(bdx_stat_names)
2358 != sizeof(struct bdx_stats) / sizeof(u64));
2359 return (priv->stats_flag) ? ARRAY_SIZE(bdx_stat_names) : 0;
2366 * bdx_get_ethtool_stats - return device's hardware L2 statistics
2371 static void bdx_get_ethtool_stats(struct net_device *netdev,
2372 struct ethtool_stats *stats, u64 *data)
2374 struct bdx_priv *priv = netdev_priv(netdev);
2376 if (priv->stats_flag) {
2378 /* Update stats from HW */
2379 bdx_update_stats(priv);
2381 /* Copy data to user buffer */
2382 memcpy(data, &priv->hw_stats, sizeof(priv->hw_stats));
2387 * bdx_set_ethtool_ops - ethtool interface implementation
2390 static void bdx_set_ethtool_ops(struct net_device *netdev)
2392 static const struct ethtool_ops bdx_ethtool_ops = {
2393 .get_settings = bdx_get_settings,
2394 .get_drvinfo = bdx_get_drvinfo,
2395 .get_link = ethtool_op_get_link,
2396 .get_coalesce = bdx_get_coalesce,
2397 .set_coalesce = bdx_set_coalesce,
2398 .get_ringparam = bdx_get_ringparam,
2399 .set_ringparam = bdx_set_ringparam,
2400 .get_strings = bdx_get_strings,
2401 .get_sset_count = bdx_get_sset_count,
2402 .get_ethtool_stats = bdx_get_ethtool_stats,
2405 netdev->ethtool_ops = &bdx_ethtool_ops;
2409 * bdx_remove - Device Removal Routine
2410 * @pdev: PCI device information struct
2412 * bdx_remove is called by the PCI subsystem to alert the driver
2413 * that it should release a PCI device. The could be caused by a
2414 * Hot-Plug event, or because the driver is going to be removed from
2417 static void bdx_remove(struct pci_dev *pdev)
2419 struct pci_nic *nic = pci_get_drvdata(pdev);
2420 struct net_device *ndev;
2423 for (port = 0; port < nic->port_num; port++) {
2424 ndev = nic->priv[port]->ndev;
2425 unregister_netdev(ndev);
2429 /*bdx_hw_reset_direct(nic->regs); */
2431 if (nic->irq_type == IRQ_MSI)
2432 pci_disable_msi(pdev);
2436 pci_release_regions(pdev);
2437 pci_disable_device(pdev);
2443 static struct pci_driver bdx_pci_driver = {
2444 .name = BDX_DRV_NAME,
2445 .id_table = bdx_pci_tbl,
2447 .remove = bdx_remove,
2451 * print_driver_id - print parameters of the driver build
2453 static void __init print_driver_id(void)
2455 pr_info("%s, %s\n", BDX_DRV_DESC, BDX_DRV_VERSION);
2456 pr_info("Options: hw_csum %s\n", BDX_MSI_STRING);
2459 static int __init bdx_module_init(void)
2464 RET(pci_register_driver(&bdx_pci_driver));
2467 module_init(bdx_module_init);
2469 static void __exit bdx_module_exit(void)
2472 pci_unregister_driver(&bdx_pci_driver);
2476 module_exit(bdx_module_exit);
2478 MODULE_LICENSE("GPL");
2479 MODULE_AUTHOR(DRIVER_AUTHOR);
2480 MODULE_DESCRIPTION(BDX_DRV_DESC);
2481 MODULE_FIRMWARE("tehuti/bdx.bin");