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 betwean 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
66 #include "tehuti_fw.h"
68 static struct pci_device_id __devinitdata bdx_pci_tbl[] = {
69 {0x1FC9, 0x3009, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
70 {0x1FC9, 0x3010, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
71 {0x1FC9, 0x3014, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
75 MODULE_DEVICE_TABLE(pci, bdx_pci_tbl);
77 /* Definitions needed by ISR or NAPI functions */
78 static void bdx_rx_alloc_skbs(struct bdx_priv *priv, struct rxf_fifo *f);
79 static void bdx_tx_cleanup(struct bdx_priv *priv);
80 static int bdx_rx_receive(struct bdx_priv *priv, struct rxd_fifo *f, int budget);
82 /* Definitions needed by FW loading */
83 static void bdx_tx_push_desc_safe(struct bdx_priv *priv, void *data, int size);
85 /* Definitions needed by hw_start */
86 static int bdx_tx_init(struct bdx_priv *priv);
87 static int bdx_rx_init(struct bdx_priv *priv);
89 /* Definitions needed by bdx_close */
90 static void bdx_rx_free(struct bdx_priv *priv);
91 static void bdx_tx_free(struct bdx_priv *priv);
93 /* Definitions needed by bdx_probe */
94 static void bdx_ethtool_ops(struct net_device *netdev);
96 /*************************************************************************
98 *************************************************************************/
100 static void print_hw_id(struct pci_dev *pdev)
102 struct pci_nic *nic = pci_get_drvdata(pdev);
103 u16 pci_link_status = 0;
106 pci_read_config_word(pdev, PCI_LINK_STATUS_REG, &pci_link_status);
107 pci_read_config_word(pdev, PCI_DEV_CTRL_REG, &pci_ctrl);
109 printk(KERN_INFO "tehuti: %s%s\n", BDX_NIC_NAME,
110 nic->port_num == 1 ? "" : ", 2-Port");
112 "tehuti: srom 0x%x fpga %d build %u lane# %d"
113 " max_pl 0x%x mrrs 0x%x\n",
114 readl(nic->regs + SROM_VER), readl(nic->regs + FPGA_VER) & 0xFFF,
115 readl(nic->regs + FPGA_SEED),
116 GET_LINK_STATUS_LANES(pci_link_status),
117 GET_DEV_CTRL_MAXPL(pci_ctrl), GET_DEV_CTRL_MRRS(pci_ctrl));
120 static void print_fw_id(struct pci_nic *nic)
122 printk(KERN_INFO "tehuti: fw 0x%x\n", readl(nic->regs + FW_VER));
125 static void print_eth_id(struct net_device *ndev)
127 printk(KERN_INFO "%s: %s, Port %c\n", ndev->name, BDX_NIC_NAME,
128 (ndev->if_port == 0) ? 'A' : 'B');
132 /*************************************************************************
134 *************************************************************************/
136 #define bdx_enable_interrupts(priv) \
137 do { WRITE_REG(priv, regIMR, IR_RUN); } while (0)
138 #define bdx_disable_interrupts(priv) \
139 do { WRITE_REG(priv, regIMR, 0); } while (0)
142 * create TX/RX descriptor fifo for host-NIC communication.
143 * 1K extra space is allocated at the end of the fifo to simplify
144 * processing of descriptors that wraps around fifo's end
145 * @priv - NIC private structure
146 * @f - fifo to initialize
147 * @fsz_type - fifo size type: 0-4KB, 1-8KB, 2-16KB, 3-32KB
148 * @reg_XXX - offsets of registers relative to base address
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 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));
181 /* bdx_fifo_free - free all resources used by fifo
182 * @priv - NIC private structure
183 * @f - fifo to release
185 static void bdx_fifo_free(struct bdx_priv *priv, struct fifo *f)
189 pci_free_consistent(priv->pdev,
190 f->memsz + FIFO_EXTRA_SPACE, f->va, f->da);
197 * bdx_link_changed - notifies OS about hw link state.
198 * @bdx_priv - hw adapter structure
200 static void bdx_link_changed(struct bdx_priv *priv)
202 u32 link = READ_REG(priv, regMAC_LNK_STAT) & MAC_LINK_STAT;
205 if (netif_carrier_ok(priv->ndev)) {
206 netif_stop_queue(priv->ndev);
207 netif_carrier_off(priv->ndev);
208 ERR("%s: Link Down\n", priv->ndev->name);
211 if (!netif_carrier_ok(priv->ndev)) {
212 netif_wake_queue(priv->ndev);
213 netif_carrier_on(priv->ndev);
214 ERR("%s: Link Up\n", priv->ndev->name);
219 static void bdx_isr_extra(struct bdx_priv *priv, u32 isr)
221 if (isr & IR_RX_FREE_0) {
222 bdx_rx_alloc_skbs(priv, &priv->rxf_fifo0);
226 if (isr & IR_LNKCHG0)
227 bdx_link_changed(priv);
229 if (isr & IR_PCIE_LINK)
230 ERR("%s: PCI-E Link Fault\n", priv->ndev->name);
232 if (isr & IR_PCIE_TOUT)
233 ERR("%s: PCI-E Time Out\n", priv->ndev->name);
237 /* bdx_isr - Interrupt Service Routine for Bordeaux NIC
238 * @irq - interrupt number
239 * @ndev - network device
240 * @regs - CPU registers
242 * Return IRQ_NONE if it was not our interrupt, IRQ_HANDLED - otherwise
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
251 static irqreturn_t bdx_isr_napi(int irq, void *dev)
253 struct net_device *ndev = dev;
254 struct bdx_priv *priv = ndev->priv;
258 isr = (READ_REG(priv, regISR) & IR_RUN);
259 if (unlikely(!isr)) {
260 bdx_enable_interrupts(priv);
261 return IRQ_NONE; /* Not our interrupt */
265 bdx_isr_extra(priv, isr);
267 if (isr & (IR_RX_DESC_0 | IR_TX_FREE_0)) {
268 if (likely(netif_rx_schedule_prep(ndev, &priv->napi))) {
269 __netif_rx_schedule(ndev, &priv->napi);
272 /* NOTE: we get here if intr has slipped into window
273 * between these lines in bdx_poll:
274 * bdx_enable_interrupts(priv);
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);
285 bdx_enable_interrupts(priv);
289 static int bdx_poll(struct napi_struct *napi, int budget)
291 struct bdx_priv *priv = container_of(napi, struct bdx_priv, napi);
292 struct net_device *dev = priv->ndev;
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) */
306 netif_rx_complete(dev, napi);
307 bdx_enable_interrupts(priv);
312 /* bdx_fw_load - loads firmware to NIC
313 * @priv - NIC private structure
314 * Firmware is loaded via TXD fifo, so it must be initialized first.
315 * Firware must be loaded once per NIC not per PCI device provided by NIC (NIC
316 * can have few of them). So all drivers use semaphore register to choose one
317 * that will actually load FW to NIC.
320 static int bdx_fw_load(struct bdx_priv *priv)
325 master = READ_REG(priv, regINIT_SEMAPHORE);
326 if (!READ_REG(priv, regINIT_STATUS) && master) {
327 bdx_tx_push_desc_safe(priv, s_firmLoad, sizeof(s_firmLoad));
330 for (i = 0; i < 200; i++) {
331 if (READ_REG(priv, regINIT_STATUS))
336 WRITE_REG(priv, regINIT_SEMAPHORE, 1);
339 ERR("%s: firmware loading failed\n", priv->ndev->name);
340 DBG("VPC = 0x%x VIC = 0x%x INIT_STATUS = 0x%x i=%d\n",
341 READ_REG(priv, regVPC),
342 READ_REG(priv, regVIC), READ_REG(priv, regINIT_STATUS), i);
345 DBG("%s: firmware loading success\n", priv->ndev->name);
350 static void bdx_restore_mac(struct net_device *ndev, struct bdx_priv *priv)
355 DBG("mac0=%x mac1=%x mac2=%x\n",
356 READ_REG(priv, regUNC_MAC0_A),
357 READ_REG(priv, regUNC_MAC1_A), READ_REG(priv, regUNC_MAC2_A));
359 val = (ndev->dev_addr[0] << 8) | (ndev->dev_addr[1]);
360 WRITE_REG(priv, regUNC_MAC2_A, val);
361 val = (ndev->dev_addr[2] << 8) | (ndev->dev_addr[3]);
362 WRITE_REG(priv, regUNC_MAC1_A, val);
363 val = (ndev->dev_addr[4] << 8) | (ndev->dev_addr[5]);
364 WRITE_REG(priv, regUNC_MAC0_A, val);
366 DBG("mac0=%x mac1=%x mac2=%x\n",
367 READ_REG(priv, regUNC_MAC0_A),
368 READ_REG(priv, regUNC_MAC1_A), READ_REG(priv, regUNC_MAC2_A));
372 /* bdx_hw_start - inits registers and starts HW's Rx and Tx engines
373 * @priv - NIC private structure
375 static int bdx_hw_start(struct bdx_priv *priv)
378 struct net_device *ndev = priv->ndev;
381 bdx_link_changed(priv);
383 /* 10G overall max length (vlan, eth&ip header, ip payload, crc) */
384 WRITE_REG(priv, regFRM_LENGTH, 0X3FE0);
385 WRITE_REG(priv, regPAUSE_QUANT, 0x96);
386 WRITE_REG(priv, regRX_FIFO_SECTION, 0x800010);
387 WRITE_REG(priv, regTX_FIFO_SECTION, 0xE00010);
388 WRITE_REG(priv, regRX_FULLNESS, 0);
389 WRITE_REG(priv, regTX_FULLNESS, 0);
390 WRITE_REG(priv, regCTRLST,
391 regCTRLST_BASE | regCTRLST_RX_ENA | regCTRLST_TX_ENA);
393 WRITE_REG(priv, regVGLB, 0);
394 WRITE_REG(priv, regMAX_FRAME_A,
395 priv->rxf_fifo0.m.pktsz & MAX_FRAME_AB_VAL);
397 DBG("RDINTCM=%08x\n", priv->rdintcm); /*NOTE: test script uses this */
398 WRITE_REG(priv, regRDINTCM0, priv->rdintcm);
399 WRITE_REG(priv, regRDINTCM2, 0); /*cpu_to_le32(rcm.val)); */
401 DBG("TDINTCM=%08x\n", priv->tdintcm); /*NOTE: test script uses this */
402 WRITE_REG(priv, regTDINTCM0, priv->tdintcm); /* old val = 0x300064 */
404 /* Enable timer interrupt once in 2 secs. */
405 /*WRITE_REG(priv, regGTMR0, ((GTMR_SEC * 2) & GTMR_DATA)); */
406 bdx_restore_mac(priv->ndev, priv);
408 WRITE_REG(priv, regGMAC_RXF_A, GMAC_RX_FILTER_OSEN |
409 GMAC_RX_FILTER_AM | GMAC_RX_FILTER_AB);
411 #define BDX_IRQ_TYPE ((priv->nic->irq_type == IRQ_MSI)?0:IRQF_SHARED)
412 if ((rc = request_irq(priv->pdev->irq, &bdx_isr_napi, BDX_IRQ_TYPE,
415 bdx_enable_interrupts(priv);
423 static void bdx_hw_stop(struct bdx_priv *priv)
426 bdx_disable_interrupts(priv);
427 free_irq(priv->pdev->irq, priv->ndev);
429 netif_carrier_off(priv->ndev);
430 netif_stop_queue(priv->ndev);
435 static int bdx_hw_reset_direct(void __iomem *regs)
440 /* reset sequences: read, write 1, read, write 0 */
441 val = readl(regs + regCLKPLL);
442 writel((val | CLKPLL_SFTRST) + 0x8, regs + regCLKPLL);
444 val = readl(regs + regCLKPLL);
445 writel(val & ~CLKPLL_SFTRST, regs + regCLKPLL);
447 /* check that the PLLs are locked and reset ended */
448 for (i = 0; i < 70; i++, mdelay(10))
449 if ((readl(regs + regCLKPLL) & CLKPLL_LKD) == CLKPLL_LKD) {
450 /* do any PCI-E read transaction */
451 readl(regs + regRXD_CFG0_0);
454 ERR("tehuti: HW reset failed\n");
455 return 1; /* failure */
458 static int bdx_hw_reset(struct bdx_priv *priv)
463 if (priv->port == 0) {
464 /* reset sequences: read, write 1, read, write 0 */
465 val = READ_REG(priv, regCLKPLL);
466 WRITE_REG(priv, regCLKPLL, (val | CLKPLL_SFTRST) + 0x8);
468 val = READ_REG(priv, regCLKPLL);
469 WRITE_REG(priv, regCLKPLL, val & ~CLKPLL_SFTRST);
471 /* check that the PLLs are locked and reset ended */
472 for (i = 0; i < 70; i++, mdelay(10))
473 if ((READ_REG(priv, regCLKPLL) & CLKPLL_LKD) == CLKPLL_LKD) {
474 /* do any PCI-E read transaction */
475 READ_REG(priv, regRXD_CFG0_0);
478 ERR("tehuti: HW reset failed\n");
479 return 1; /* failure */
482 static int bdx_sw_reset(struct bdx_priv *priv)
487 /* 1. load MAC (obsolete) */
488 /* 2. disable Rx (and Tx) */
489 WRITE_REG(priv, regGMAC_RXF_A, 0);
491 /* 3. disable port */
492 WRITE_REG(priv, regDIS_PORT, 1);
493 /* 4. disable queue */
494 WRITE_REG(priv, regDIS_QU, 1);
495 /* 5. wait until hw is disabled */
496 for (i = 0; i < 50; i++) {
497 if (READ_REG(priv, regRST_PORT) & 1)
502 ERR("%s: SW reset timeout. continuing anyway\n",
505 /* 6. disable intrs */
506 WRITE_REG(priv, regRDINTCM0, 0);
507 WRITE_REG(priv, regTDINTCM0, 0);
508 WRITE_REG(priv, regIMR, 0);
509 READ_REG(priv, regISR);
512 WRITE_REG(priv, regRST_QU, 1);
514 WRITE_REG(priv, regRST_PORT, 1);
515 /* 9. zero all read and write pointers */
516 for (i = regTXD_WPTR_0; i <= regTXF_RPTR_3; i += 0x10)
517 DBG("%x = %x\n", i, READ_REG(priv, i) & TXF_WPTR_WR_PTR);
518 for (i = regTXD_WPTR_0; i <= regTXF_RPTR_3; i += 0x10)
519 WRITE_REG(priv, i, 0);
520 /* 10. unseet port disable */
521 WRITE_REG(priv, regDIS_PORT, 0);
522 /* 11. unset queue disable */
523 WRITE_REG(priv, regDIS_QU, 0);
524 /* 12. unset queue reset */
525 WRITE_REG(priv, regRST_QU, 0);
526 /* 13. unset port reset */
527 WRITE_REG(priv, regRST_PORT, 0);
529 /* skiped. will be done later */
530 /* 15. save MAC (obsolete) */
531 for (i = regTXD_WPTR_0; i <= regTXF_RPTR_3; i += 0x10)
532 DBG("%x = %x\n", i, READ_REG(priv, i) & TXF_WPTR_WR_PTR);
537 /* bdx_reset - performs right type of reset depending on hw type */
538 static int bdx_reset(struct bdx_priv *priv)
541 RET((priv->pdev->device == 0x3009)
543 : bdx_sw_reset(priv));
547 * bdx_close - Disables a network interface
548 * @netdev: network interface device structure
550 * Returns 0, this is not allowed to fail
552 * The close entry point is called when an interface is de-activated
553 * by the OS. The hardware is still under the drivers control, but
554 * needs to be disabled. A global MAC reset is issued to stop the
555 * hardware, and all transmit and receive resources are freed.
557 static int bdx_close(struct net_device *ndev)
559 struct bdx_priv *priv = NULL;
564 napi_disable(&priv->napi);
574 * bdx_open - Called when a network interface is made active
575 * @netdev: network interface device structure
577 * Returns 0 on success, negative value on failure
579 * The open entry point is called when a network interface is made
580 * active by the system (IFF_UP). At this point all resources needed
581 * for transmit and receive operations are allocated, the interrupt
582 * handler is registered with the OS, the watchdog timer is started,
583 * and the stack is notified that the interface is ready.
585 static int bdx_open(struct net_device *ndev)
587 struct bdx_priv *priv;
593 if (netif_running(ndev))
594 netif_stop_queue(priv->ndev);
596 if ((rc = bdx_tx_init(priv)))
599 if ((rc = bdx_rx_init(priv)))
602 if ((rc = bdx_fw_load(priv)))
605 bdx_rx_alloc_skbs(priv, &priv->rxf_fifo0);
607 if ((rc = bdx_hw_start(priv)))
610 napi_enable(&priv->napi);
612 print_fw_id(priv->nic);
621 static void __init bdx_firmware_endianess(void)
624 for (i = 0; i < ARRAY_SIZE(s_firmLoad); i++)
625 s_firmLoad[i] = CPU_CHIP_SWAP32(s_firmLoad[i]);
628 static int bdx_range_check(struct bdx_priv *priv, u32 offset)
630 return (offset > (u32) (BDX_REGS_SIZE / priv->nic->port_num)) ?
634 static int bdx_ioctl_priv(struct net_device *ndev, struct ifreq *ifr, int cmd)
636 struct bdx_priv *priv = ndev->priv;
642 DBG("jiffies=%ld cmd=%d\n", jiffies, cmd);
643 if (cmd != SIOCDEVPRIVATE) {
644 error = copy_from_user(data, ifr->ifr_data, sizeof(data));
646 ERR("cant copy from user\n");
649 DBG("%d 0x%x 0x%x\n", data[0], data[1], data[2]);
655 error = bdx_range_check(priv, data[1]);
658 data[2] = READ_REG(priv, data[1]);
659 DBG("read_reg(0x%x)=0x%x (dec %d)\n", data[1], data[2],
661 error = copy_to_user(ifr->ifr_data, data, sizeof(data));
667 if (!capable(CAP_NET_ADMIN))
669 error = bdx_range_check(priv, data[1]);
672 WRITE_REG(priv, data[1], data[2]);
673 DBG("write_reg(0x%x, 0x%x)\n", data[1], data[2]);
682 static int bdx_ioctl(struct net_device *ndev, struct ifreq *ifr, int cmd)
685 if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15))
686 RET(bdx_ioctl_priv(ndev, ifr, cmd));
692 * __bdx_vlan_rx_vid - private helper for adding/killing VLAN vid
693 * by passing VLAN filter table to hardware
694 * @ndev network device
696 * @op add or kill operation
698 static void __bdx_vlan_rx_vid(struct net_device *ndev, uint16_t vid, int enable)
700 struct bdx_priv *priv = ndev->priv;
704 DBG2("vid=%d value=%d\n", (int)vid, enable);
705 if (unlikely(vid >= 4096)) {
706 ERR("tehuti: invalid VID: %u (> 4096)\n", vid);
709 reg = regVLAN_0 + (vid / 32) * 4;
711 val = READ_REG(priv, reg);
712 DBG2("reg=%x, val=%x, bit=%d\n", reg, val, bit);
717 DBG2("new val %x\n", val);
718 WRITE_REG(priv, reg, val);
723 * bdx_vlan_rx_add_vid - kernel hook for adding VLAN vid to hw filtering table
724 * @ndev network device
725 * @vid VLAN vid to add
727 static void bdx_vlan_rx_add_vid(struct net_device *ndev, uint16_t vid)
729 __bdx_vlan_rx_vid(ndev, vid, 1);
733 * bdx_vlan_rx_kill_vid - kernel hook for killing VLAN vid in hw filtering table
734 * @ndev network device
735 * @vid VLAN vid to kill
737 static void bdx_vlan_rx_kill_vid(struct net_device *ndev, unsigned short vid)
739 __bdx_vlan_rx_vid(ndev, vid, 0);
743 * bdx_vlan_rx_register - kernel hook for adding VLAN group
744 * @ndev network device
748 bdx_vlan_rx_register(struct net_device *ndev, struct vlan_group *grp)
750 struct bdx_priv *priv = ndev->priv;
753 DBG("device='%s', group='%p'\n", ndev->name, grp);
759 * bdx_change_mtu - Change the Maximum Transfer Unit
760 * @netdev: network interface device structure
761 * @new_mtu: new value for maximum frame size
763 * Returns 0 on success, negative on failure
765 static int bdx_change_mtu(struct net_device *ndev, int new_mtu)
769 if (new_mtu == ndev->mtu)
772 /* enforce minimum frame size */
773 if (new_mtu < ETH_ZLEN) {
774 ERR("%s: %s mtu %d is less then minimal %d\n",
775 BDX_DRV_NAME, ndev->name, new_mtu, ETH_ZLEN);
780 if (netif_running(ndev)) {
787 static void bdx_setmulti(struct net_device *ndev)
789 struct bdx_priv *priv = ndev->priv;
792 GMAC_RX_FILTER_AM | GMAC_RX_FILTER_AB | GMAC_RX_FILTER_OSEN;
796 /* IMF - imperfect (hash) rx multicat filter */
797 /* PMF - perfect rx multicat filter */
799 /* FIXME: RXE(OFF) */
800 if (ndev->flags & IFF_PROMISC) {
801 rxf_val |= GMAC_RX_FILTER_PRM;
802 } else if (ndev->flags & IFF_ALLMULTI) {
803 /* set IMF to accept all multicast frmaes */
804 for (i = 0; i < MAC_MCST_HASH_NUM; i++)
805 WRITE_REG(priv, regRX_MCST_HASH0 + i * 4, ~0);
806 } else if (ndev->mc_count) {
808 struct dev_mc_list *mclist;
811 /* set IMF to deny all multicast frames */
812 for (i = 0; i < MAC_MCST_HASH_NUM; i++)
813 WRITE_REG(priv, regRX_MCST_HASH0 + i * 4, 0);
814 /* set PMF to deny all multicast frames */
815 for (i = 0; i < MAC_MCST_NUM; i++) {
816 WRITE_REG(priv, regRX_MAC_MCST0 + i * 8, 0);
817 WRITE_REG(priv, regRX_MAC_MCST1 + i * 8, 0);
820 /* use PMF to accept first MAC_MCST_NUM (15) addresses */
821 /* TBD: sort addreses and write them in ascending order
822 * into RX_MAC_MCST regs. we skip this phase now and accept ALL
823 * multicast frames throu IMF */
824 mclist = ndev->mc_list;
826 /* accept the rest of addresses throu IMF */
827 for (; mclist; mclist = mclist->next) {
829 for (i = 0; i < ETH_ALEN; i++)
830 hash ^= mclist->dmi_addr[i];
831 reg = regRX_MCST_HASH0 + ((hash >> 5) << 2);
832 val = READ_REG(priv, reg);
833 val |= (1 << (hash % 32));
834 WRITE_REG(priv, reg, val);
838 DBG("only own mac %d\n", ndev->mc_count);
839 rxf_val |= GMAC_RX_FILTER_AB;
841 WRITE_REG(priv, regGMAC_RXF_A, rxf_val);
847 static int bdx_set_mac(struct net_device *ndev, void *p)
849 struct bdx_priv *priv = ndev->priv;
850 struct sockaddr *addr = p;
854 if (netif_running(dev))
857 memcpy(ndev->dev_addr, addr->sa_data, ndev->addr_len);
858 bdx_restore_mac(ndev, priv);
862 static int bdx_read_mac(struct bdx_priv *priv)
864 u16 macAddress[3], i;
867 macAddress[2] = READ_REG(priv, regUNC_MAC0_A);
868 macAddress[2] = READ_REG(priv, regUNC_MAC0_A);
869 macAddress[1] = READ_REG(priv, regUNC_MAC1_A);
870 macAddress[1] = READ_REG(priv, regUNC_MAC1_A);
871 macAddress[0] = READ_REG(priv, regUNC_MAC2_A);
872 macAddress[0] = READ_REG(priv, regUNC_MAC2_A);
873 for (i = 0; i < 3; i++) {
874 priv->ndev->dev_addr[i * 2 + 1] = macAddress[i];
875 priv->ndev->dev_addr[i * 2] = macAddress[i] >> 8;
880 static u64 bdx_read_l2stat(struct bdx_priv *priv, int reg)
884 val = READ_REG(priv, reg);
885 val |= ((u64) READ_REG(priv, reg + 8)) << 32;
889 /*Do the statistics-update work*/
890 static void bdx_update_stats(struct bdx_priv *priv)
892 struct bdx_stats *stats = &priv->hw_stats;
893 u64 *stats_vector = (u64 *) stats;
897 /*Fill HW structure */
899 /*First 12 statistics - 0x7200 - 0x72B0 */
900 for (i = 0; i < 12; i++) {
901 stats_vector[i] = bdx_read_l2stat(priv, addr);
904 BDX_ASSERT(addr != 0x72C0);
905 /* 0x72C0-0x72E0 RSRV */
907 for (; i < 16; i++) {
908 stats_vector[i] = bdx_read_l2stat(priv, addr);
911 BDX_ASSERT(addr != 0x7330);
912 /* 0x7330-0x7360 RSRV */
914 for (; i < 19; i++) {
915 stats_vector[i] = bdx_read_l2stat(priv, addr);
918 BDX_ASSERT(addr != 0x73A0);
919 /* 0x73A0-0x73B0 RSRV */
921 for (; i < 23; i++) {
922 stats_vector[i] = bdx_read_l2stat(priv, addr);
925 BDX_ASSERT(addr != 0x7400);
926 BDX_ASSERT((sizeof(struct bdx_stats) / sizeof(u64)) != i);
929 static struct net_device_stats *bdx_get_stats(struct net_device *ndev)
931 struct bdx_priv *priv = ndev->priv;
932 struct net_device_stats *net_stat = &priv->net_stats;
936 static void print_rxdd(struct rxd_desc *rxdd, u32 rxd_val1, u16 len,
938 static void print_rxfd(struct rxf_desc *rxfd);
940 /*************************************************************************
942 *************************************************************************/
944 static void bdx_rxdb_destroy(struct rxdb *db)
950 static struct rxdb *bdx_rxdb_create(int nelem)
955 db = vmalloc(sizeof(struct rxdb)
956 + (nelem * sizeof(int))
957 + (nelem * sizeof(struct rx_map)));
958 if (likely(db != NULL)) {
959 db->stack = (int *)(db + 1);
960 db->elems = (void *)(db->stack + nelem);
963 for (i = 0; i < nelem; i++)
964 db->stack[i] = nelem - i - 1; /* to make first allocs
971 static inline int bdx_rxdb_alloc_elem(struct rxdb *db)
973 BDX_ASSERT(db->top <= 0);
974 return db->stack[--(db->top)];
977 static inline void *bdx_rxdb_addr_elem(struct rxdb *db, int n)
979 BDX_ASSERT((n < 0) || (n >= db->nelem));
980 return db->elems + n;
983 static inline int bdx_rxdb_available(struct rxdb *db)
988 static inline void bdx_rxdb_free_elem(struct rxdb *db, int n)
990 BDX_ASSERT((n >= db->nelem) || (n < 0));
991 db->stack[(db->top)++] = n;
994 /*************************************************************************
996 *************************************************************************/
998 /* bdx_rx_init - initialize RX all related HW and SW resources
999 * @priv - NIC private structure
1001 * Returns 0 on success, negative value on failure
1003 * It creates rxf and rxd fifos, update relevant HW registers, preallocate
1004 * skb for rx. It assumes that Rx is desabled in HW
1005 * funcs are grouped for better cache usage
1007 * RxD fifo is smaller then RxF fifo by design. Upon high load, RxD will be
1008 * filled and packets will be dropped by nic without getting into host or
1009 * cousing interrupt. Anyway, in that condition, host has no chance to proccess
1010 * all packets, but dropping in nic is cheaper, since it takes 0 cpu cycles
1013 /* TBD: ensure proper packet size */
1015 static int bdx_rx_init(struct bdx_priv *priv)
1019 if (bdx_fifo_init(priv, &priv->rxd_fifo0.m, priv->rxd_size,
1020 regRXD_CFG0_0, regRXD_CFG1_0,
1021 regRXD_RPTR_0, regRXD_WPTR_0))
1023 if (bdx_fifo_init(priv, &priv->rxf_fifo0.m, priv->rxf_size,
1024 regRXF_CFG0_0, regRXF_CFG1_0,
1025 regRXF_RPTR_0, regRXF_WPTR_0))
1029 bdx_rxdb_create(priv->rxf_fifo0.m.memsz /
1030 sizeof(struct rxf_desc))))
1033 priv->rxf_fifo0.m.pktsz = priv->ndev->mtu + VLAN_ETH_HLEN;
1037 ERR("%s: %s: Rx init failed\n", BDX_DRV_NAME, priv->ndev->name);
1041 /* bdx_rx_free_skbs - frees and unmaps all skbs allocated for the fifo
1042 * @priv - NIC private structure
1045 static void bdx_rx_free_skbs(struct bdx_priv *priv, struct rxf_fifo *f)
1048 struct rxdb *db = priv->rxdb;
1052 DBG("total=%d free=%d busy=%d\n", db->nelem, bdx_rxdb_available(db),
1053 db->nelem - bdx_rxdb_available(db));
1054 while (bdx_rxdb_available(db) > 0) {
1055 i = bdx_rxdb_alloc_elem(db);
1056 dm = bdx_rxdb_addr_elem(db, i);
1059 for (i = 0; i < db->nelem; i++) {
1060 dm = bdx_rxdb_addr_elem(db, i);
1062 pci_unmap_single(priv->pdev,
1063 dm->dma, f->m.pktsz,
1064 PCI_DMA_FROMDEVICE);
1065 dev_kfree_skb(dm->skb);
1070 /* bdx_rx_free - release all Rx resources
1071 * @priv - NIC private structure
1072 * It assumes that Rx is desabled in HW
1074 static void bdx_rx_free(struct bdx_priv *priv)
1078 bdx_rx_free_skbs(priv, &priv->rxf_fifo0);
1079 bdx_rxdb_destroy(priv->rxdb);
1082 bdx_fifo_free(priv, &priv->rxf_fifo0.m);
1083 bdx_fifo_free(priv, &priv->rxd_fifo0.m);
1088 /*************************************************************************
1090 *************************************************************************/
1092 /* bdx_rx_alloc_skbs - fill rxf fifo with new skbs
1093 * @priv - nic's private structure
1094 * @f - RXF fifo that needs skbs
1095 * It allocates skbs, build rxf descs and push it (rxf descr) into rxf fifo.
1096 * skb's virtual and physical addresses are stored in skb db.
1097 * To calculate free space, func uses cached values of RPTR and WPTR
1098 * When needed, it also updates RPTR and WPTR.
1101 /* TBD: do not update WPTR if no desc were written */
1103 static void bdx_rx_alloc_skbs(struct bdx_priv *priv, struct rxf_fifo *f)
1105 struct sk_buff *skb;
1106 struct rxf_desc *rxfd;
1108 int dno, delta, idx;
1109 struct rxdb *db = priv->rxdb;
1112 dno = bdx_rxdb_available(db) - 1;
1114 if (!(skb = dev_alloc_skb(f->m.pktsz + NET_IP_ALIGN))) {
1115 ERR("NO MEM: dev_alloc_skb failed\n");
1118 skb->dev = priv->ndev;
1119 skb_reserve(skb, NET_IP_ALIGN);
1121 idx = bdx_rxdb_alloc_elem(db);
1122 dm = bdx_rxdb_addr_elem(db, idx);
1123 dm->dma = pci_map_single(priv->pdev,
1124 skb->data, f->m.pktsz,
1125 PCI_DMA_FROMDEVICE);
1127 rxfd = (struct rxf_desc *)(f->m.va + f->m.wptr);
1128 rxfd->info = CPU_CHIP_SWAP32(0x10003); /* INFO=1 BC=3 */
1130 rxfd->pa_lo = CPU_CHIP_SWAP32(L32_64(dm->dma));
1131 rxfd->pa_hi = CPU_CHIP_SWAP32(H32_64(dm->dma));
1132 rxfd->len = CPU_CHIP_SWAP32(f->m.pktsz);
1135 f->m.wptr += sizeof(struct rxf_desc);
1136 delta = f->m.wptr - f->m.memsz;
1137 if (unlikely(delta >= 0)) {
1140 memcpy(f->m.va, f->m.va + f->m.memsz, delta);
1141 DBG("wrapped descriptor\n");
1146 /*TBD: to do - delayed rxf wptr like in txd */
1147 WRITE_REG(priv, f->m.reg_WPTR, f->m.wptr & TXF_WPTR_WR_PTR);
1152 NETIF_RX_MUX(struct bdx_priv *priv, u32 rxd_val1, u16 rxd_vlan,
1153 struct sk_buff *skb)
1156 DBG("rxdd->flags.bits.vtag=%d vlgrp=%p\n", GET_RXD_VTAG(rxd_val1),
1158 if (priv->vlgrp && GET_RXD_VTAG(rxd_val1)) {
1159 DBG("%s: vlan rcv vlan '%x' vtag '%x', device name '%s'\n",
1161 GET_RXD_VLAN_ID(rxd_vlan),
1162 GET_RXD_VTAG(rxd_val1),
1163 vlan_group_get_device(priv->vlgrp,
1164 GET_RXD_VLAN_ID(rxd_vlan))->name);
1165 /* NAPI variant of receive functions */
1166 vlan_hwaccel_receive_skb(skb, priv->vlgrp,
1167 GET_RXD_VLAN_ID(rxd_vlan));
1169 netif_receive_skb(skb);
1173 static void bdx_recycle_skb(struct bdx_priv *priv, struct rxd_desc *rxdd)
1175 struct rxf_desc *rxfd;
1179 struct sk_buff *skb;
1183 DBG("priv=%p rxdd=%p\n", priv, rxdd);
1184 f = &priv->rxf_fifo0;
1186 DBG("db=%p f=%p\n", db, f);
1187 dm = bdx_rxdb_addr_elem(db, rxdd->va_lo);
1190 rxfd = (struct rxf_desc *)(f->m.va + f->m.wptr);
1191 rxfd->info = CPU_CHIP_SWAP32(0x10003); /* INFO=1 BC=3 */
1192 rxfd->va_lo = rxdd->va_lo;
1193 rxfd->pa_lo = CPU_CHIP_SWAP32(L32_64(dm->dma));
1194 rxfd->pa_hi = CPU_CHIP_SWAP32(H32_64(dm->dma));
1195 rxfd->len = CPU_CHIP_SWAP32(f->m.pktsz);
1198 f->m.wptr += sizeof(struct rxf_desc);
1199 delta = f->m.wptr - f->m.memsz;
1200 if (unlikely(delta >= 0)) {
1203 memcpy(f->m.va, f->m.va + f->m.memsz, delta);
1204 DBG("wrapped descriptor\n");
1210 /* bdx_rx_receive - recieves full packets from RXD fifo and pass them to OS
1211 * NOTE: a special treatment is given to non-continous descriptors
1212 * that start near the end, wraps around and continue at the beginning. a second
1213 * part is copied right after the first, and then descriptor is interpreted as
1214 * normal. fifo has an extra space to allow such operations
1215 * @priv - nic's private structure
1216 * @f - RXF fifo that needs skbs
1219 /* TBD: replace memcpy func call by explicite inline asm */
1221 static int bdx_rx_receive(struct bdx_priv *priv, struct rxd_fifo *f, int budget)
1223 struct sk_buff *skb, *skb2;
1224 struct rxd_desc *rxdd;
1226 struct rxf_fifo *rxf_fifo;
1229 int max_done = BDX_MAX_RX_DONE;
1230 struct rxdb *db = NULL;
1231 /* Unmarshalled descriptor - copy of descriptor in host order */
1239 priv->ndev->last_rx = jiffies;
1240 f->m.wptr = READ_REG(priv, f->m.reg_WPTR) & TXF_WPTR_WR_PTR;
1242 size = f->m.wptr - f->m.rptr;
1244 size = f->m.memsz + size; /* size is negative :-) */
1248 rxdd = (struct rxd_desc *)(f->m.va + f->m.rptr);
1249 rxd_val1 = CPU_CHIP_SWAP32(rxdd->rxd_val1);
1251 len = CPU_CHIP_SWAP16(rxdd->len);
1253 rxd_vlan = CPU_CHIP_SWAP16(rxdd->rxd_vlan);
1255 print_rxdd(rxdd, rxd_val1, len, rxd_vlan);
1257 tmp_len = GET_RXD_BC(rxd_val1) << 3;
1258 BDX_ASSERT(tmp_len <= 0);
1260 if (size < 0) /* test for partially arrived descriptor */
1263 f->m.rptr += tmp_len;
1265 tmp_len = f->m.rptr - f->m.memsz;
1266 if (unlikely(tmp_len >= 0)) {
1267 f->m.rptr = tmp_len;
1269 DBG("wrapped desc rptr=%d tmp_len=%d\n",
1270 f->m.rptr, tmp_len);
1271 memcpy(f->m.va + f->m.memsz, f->m.va, tmp_len);
1275 if (unlikely(GET_RXD_ERR(rxd_val1))) {
1276 DBG("rxd_err = 0x%x\n", GET_RXD_ERR(rxd_val1));
1277 priv->net_stats.rx_errors++;
1278 bdx_recycle_skb(priv, rxdd);
1282 rxf_fifo = &priv->rxf_fifo0;
1284 dm = bdx_rxdb_addr_elem(db, rxdd->va_lo);
1287 if (len < BDX_COPYBREAK &&
1288 (skb2 = dev_alloc_skb(len + NET_IP_ALIGN))) {
1289 skb_reserve(skb2, NET_IP_ALIGN);
1290 /*skb_put(skb2, len); */
1291 pci_dma_sync_single_for_cpu(priv->pdev,
1292 dm->dma, rxf_fifo->m.pktsz,
1293 PCI_DMA_FROMDEVICE);
1294 memcpy(skb2->data, skb->data, len);
1295 bdx_recycle_skb(priv, rxdd);
1298 pci_unmap_single(priv->pdev,
1299 dm->dma, rxf_fifo->m.pktsz,
1300 PCI_DMA_FROMDEVICE);
1301 bdx_rxdb_free_elem(db, rxdd->va_lo);
1304 priv->net_stats.rx_bytes += len;
1307 skb->dev = priv->ndev;
1308 skb->ip_summed = CHECKSUM_UNNECESSARY;
1309 skb->protocol = eth_type_trans(skb, priv->ndev);
1311 /* Non-IP packets aren't checksum-offloaded */
1312 if (GET_RXD_PKT_ID(rxd_val1) == 0)
1313 skb->ip_summed = CHECKSUM_NONE;
1315 NETIF_RX_MUX(priv, rxd_val1, rxd_vlan, skb);
1317 if (++done >= max_done)
1321 priv->net_stats.rx_packets += done;
1323 /* FIXME: do smth to minimize pci accesses */
1324 WRITE_REG(priv, f->m.reg_RPTR, f->m.rptr & TXF_WPTR_WR_PTR);
1326 bdx_rx_alloc_skbs(priv, &priv->rxf_fifo0);
1331 /*************************************************************************
1332 * Debug / Temprorary Code *
1333 *************************************************************************/
1334 static void print_rxdd(struct rxd_desc *rxdd, u32 rxd_val1, u16 len,
1337 DBG("ERROR: rxdd bc %d rxfq %d to %d type %d err %d rxp %d "
1338 "pkt_id %d vtag %d len %d vlan_id %d cfi %d prio %d "
1339 "va_lo %d va_hi %d\n",
1340 GET_RXD_BC(rxd_val1), GET_RXD_RXFQ(rxd_val1), GET_RXD_TO(rxd_val1),
1341 GET_RXD_TYPE(rxd_val1), GET_RXD_ERR(rxd_val1),
1342 GET_RXD_RXP(rxd_val1), GET_RXD_PKT_ID(rxd_val1),
1343 GET_RXD_VTAG(rxd_val1), len, GET_RXD_VLAN_ID(rxd_vlan),
1344 GET_RXD_CFI(rxd_vlan), GET_RXD_PRIO(rxd_vlan), rxdd->va_lo,
1348 static void print_rxfd(struct rxf_desc *rxfd)
1350 DBG("=== RxF desc CHIP ORDER/ENDIANESS =============\n"
1351 "info 0x%x va_lo %u pa_lo 0x%x pa_hi 0x%x len 0x%x\n",
1352 rxfd->info, rxfd->va_lo, rxfd->pa_lo, rxfd->pa_hi, rxfd->len);
1356 * TX HW/SW interaction overview
1357 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1358 * There are 2 types of TX communication channels betwean driver and NIC.
1359 * 1) TX Free Fifo - TXF - holds ack descriptors for sent packets
1360 * 2) TX Data Fifo - TXD - holds descriptors of full buffers.
1362 * Currently NIC supports TSO, checksuming and gather DMA
1363 * UFO and IP fragmentation is on the way
1365 * RX SW Data Structures
1366 * ~~~~~~~~~~~~~~~~~~~~~
1367 * txdb - used to keep track of all skbs owned by SW and their dma addresses.
1368 * For TX case, ownership lasts from geting packet via hard_xmit and until HW
1369 * acknowledges sent by TXF descriptors.
1370 * Implemented as cyclic buffer.
1371 * fifo - keeps info about fifo's size and location, relevant HW registers,
1372 * usage and skb db. Each RXD and RXF Fifo has its own fifo structure.
1373 * Implemented as simple struct.
1375 * TX SW Execution Flow
1376 * ~~~~~~~~~~~~~~~~~~~~
1377 * OS calls driver's hard_xmit method with packet to sent.
1378 * Driver creates DMA mappings, builds TXD descriptors and kicks HW
1379 * by updating TXD WPTR.
1380 * When packet is sent, HW write us TXF descriptor and SW frees original skb.
1381 * To prevent TXD fifo overflow without reading HW registers every time,
1382 * SW deploys "tx level" technique.
1383 * Upon strart up, tx level is initialized to TXD fifo length.
1384 * For every sent packet, SW gets its TXD descriptor sizei
1385 * (from precalculated array) and substructs it from tx level.
1386 * The size is also stored in txdb. When TXF ack arrives, SW fetch size of
1387 * original TXD descriptor from txdb and adds it to tx level.
1388 * When Tx level drops under some predefined treshhold, the driver
1389 * stops the TX queue. When TX level rises above that level,
1390 * the tx queue is enabled again.
1392 * This technique avoids eccessive reading of RPTR and WPTR registers.
1393 * As our benchmarks shows, it adds 1.5 Gbit/sec to NIS's throuput.
1396 /*************************************************************************
1398 *************************************************************************/
1399 static inline int bdx_tx_db_size(struct txdb *db)
1401 int taken = db->wptr - db->rptr;
1403 taken = db->size + 1 + taken; /* (size + 1) equals memsz */
1405 return db->size - taken;
1408 /* __bdx_tx_ptr_next - helper function, increment read/write pointer + wrap
1410 * @ptr - read or write pointer
1412 static inline void __bdx_tx_db_ptr_next(struct txdb *db, struct tx_map **pptr)
1414 BDX_ASSERT(db == NULL || pptr == NULL); /* sanity */
1416 BDX_ASSERT(*pptr != db->rptr && /* expect either read */
1417 *pptr != db->wptr); /* or write pointer */
1419 BDX_ASSERT(*pptr < db->start || /* pointer has to be */
1420 *pptr >= db->end); /* in range */
1423 if (unlikely(*pptr == db->end))
1427 /* bdx_tx_db_inc_rptr - increment read pointer
1430 static inline void bdx_tx_db_inc_rptr(struct txdb *db)
1432 BDX_ASSERT(db->rptr == db->wptr); /* can't read from empty db */
1433 __bdx_tx_db_ptr_next(db, &db->rptr);
1436 /* bdx_tx_db_inc_rptr - increment write pointer
1439 static inline void bdx_tx_db_inc_wptr(struct txdb *db)
1441 __bdx_tx_db_ptr_next(db, &db->wptr);
1442 BDX_ASSERT(db->rptr == db->wptr); /* we can not get empty db as
1443 a result of write */
1446 /* bdx_tx_db_init - creates and initializes tx db
1448 * @sz_type - size of tx fifo
1449 * Returns 0 on success, error code otherwise
1451 static int bdx_tx_db_init(struct txdb *d, int sz_type)
1453 int memsz = FIFO_SIZE * (1 << (sz_type + 1));
1455 d->start = vmalloc(memsz);
1460 * In order to differentiate between db is empty and db is full
1461 * states at least one element should always be empty in order to
1462 * avoid rptr == wptr which means db is empty
1464 d->size = memsz / sizeof(struct tx_map) - 1;
1465 d->end = d->start + d->size + 1; /* just after last element */
1467 /* all dbs are created equally empty */
1474 /* bdx_tx_db_close - closes tx db and frees all memory
1477 static void bdx_tx_db_close(struct txdb *d)
1479 BDX_ASSERT(d == NULL);
1487 /*************************************************************************
1489 *************************************************************************/
1491 /* sizes of tx desc (including padding if needed) as function
1492 * of skb's frag number */
1495 u16 qwords; /* qword = 64 bit */
1496 } txd_sizes[MAX_SKB_FRAGS + 1];
1498 /* txdb_map_skb - creates and stores dma mappings for skb's data blocks
1499 * @priv - NIC private structure
1500 * @skb - socket buffer to map
1502 * It makes dma mappings for skb's data blocks and writes them to PBL of
1503 * new tx descriptor. It also stores them in the tx db, so they could be
1504 * unmaped after data was sent. It is reponsibility of a caller to make
1505 * sure that there is enough space in the tx db. Last element holds pointer
1506 * to skb itself and marked with zero length
1509 bdx_tx_map_skb(struct bdx_priv *priv, struct sk_buff *skb,
1510 struct txd_desc *txdd)
1512 struct txdb *db = &priv->txdb;
1513 struct pbl *pbl = &txdd->pbl[0];
1514 int nr_frags = skb_shinfo(skb)->nr_frags;
1517 db->wptr->len = skb->len - skb->data_len;
1518 db->wptr->addr.dma = pci_map_single(priv->pdev, skb->data,
1519 db->wptr->len, PCI_DMA_TODEVICE);
1520 pbl->len = CPU_CHIP_SWAP32(db->wptr->len);
1521 pbl->pa_lo = CPU_CHIP_SWAP32(L32_64(db->wptr->addr.dma));
1522 pbl->pa_hi = CPU_CHIP_SWAP32(H32_64(db->wptr->addr.dma));
1523 DBG("=== pbl len: 0x%x ================\n", pbl->len);
1524 DBG("=== pbl pa_lo: 0x%x ================\n", pbl->pa_lo);
1525 DBG("=== pbl pa_hi: 0x%x ================\n", pbl->pa_hi);
1526 bdx_tx_db_inc_wptr(db);
1528 for (i = 0; i < nr_frags; i++) {
1529 struct skb_frag_struct *frag;
1531 frag = &skb_shinfo(skb)->frags[i];
1532 db->wptr->len = frag->size;
1533 db->wptr->addr.dma =
1534 pci_map_page(priv->pdev, frag->page, frag->page_offset,
1535 frag->size, PCI_DMA_TODEVICE);
1538 pbl->len = CPU_CHIP_SWAP32(db->wptr->len);
1539 pbl->pa_lo = CPU_CHIP_SWAP32(L32_64(db->wptr->addr.dma));
1540 pbl->pa_hi = CPU_CHIP_SWAP32(H32_64(db->wptr->addr.dma));
1541 bdx_tx_db_inc_wptr(db);
1544 /* add skb clean up info. */
1545 db->wptr->len = -txd_sizes[nr_frags].bytes;
1546 db->wptr->addr.skb = skb;
1547 bdx_tx_db_inc_wptr(db);
1550 /* init_txd_sizes - precalculate sizes of descriptors for skbs up to 16 frags
1551 * number of frags is used as index to fetch correct descriptors size,
1552 * instead of calculating it each time */
1553 static void __init init_txd_sizes(void)
1557 /* 7 - is number of lwords in txd with one phys buffer
1558 * 3 - is number of lwords used for every additional phys buffer */
1559 for (i = 0; i < MAX_SKB_FRAGS + 1; i++) {
1560 lwords = 7 + (i * 3);
1562 lwords++; /* pad it with 1 lword */
1563 txd_sizes[i].qwords = lwords >> 1;
1564 txd_sizes[i].bytes = lwords << 2;
1568 /* bdx_tx_init - initialize all Tx related stuff.
1569 * Namely, TXD and TXF fifos, database etc */
1570 static int bdx_tx_init(struct bdx_priv *priv)
1572 if (bdx_fifo_init(priv, &priv->txd_fifo0.m, priv->txd_size,
1574 regTXD_CFG1_0, regTXD_RPTR_0, regTXD_WPTR_0))
1576 if (bdx_fifo_init(priv, &priv->txf_fifo0.m, priv->txf_size,
1578 regTXF_CFG1_0, regTXF_RPTR_0, regTXF_WPTR_0))
1581 /* The TX db has to keep mappings for all packets sent (on TxD)
1582 * and not yet reclaimed (on TxF) */
1583 if (bdx_tx_db_init(&priv->txdb, max(priv->txd_size, priv->txf_size)))
1586 priv->tx_level = BDX_MAX_TX_LEVEL;
1587 #ifdef BDX_DELAY_WPTR
1588 priv->tx_update_mark = priv->tx_level - 1024;
1593 ERR("tehuti: %s: Tx init failed\n", priv->ndev->name);
1598 * bdx_tx_space - calculates avalable space in TX fifo
1599 * @priv - NIC private structure
1600 * Returns avaliable space in TX fifo in bytes
1602 static inline int bdx_tx_space(struct bdx_priv *priv)
1604 struct txd_fifo *f = &priv->txd_fifo0;
1607 f->m.rptr = READ_REG(priv, f->m.reg_RPTR) & TXF_WPTR_WR_PTR;
1608 fsize = f->m.rptr - f->m.wptr;
1610 fsize = f->m.memsz + fsize;
1614 /* bdx_tx_transmit - send packet to NIC
1615 * @skb - packet to send
1616 * ndev - network device assigned to NIC
1618 * o NETDEV_TX_OK everything ok.
1619 * o NETDEV_TX_BUSY Cannot transmit packet, try later
1620 * Usually a bug, means queue start/stop flow control is broken in
1621 * the driver. Note: the driver must NOT put the skb in its DMA ring.
1622 * o NETDEV_TX_LOCKED Locking failed, please retry quickly.
1624 static int bdx_tx_transmit(struct sk_buff *skb, struct net_device *ndev)
1626 struct bdx_priv *priv = ndev->priv;
1627 struct txd_fifo *f = &priv->txd_fifo0;
1628 int txd_checksum = 7; /* full checksum */
1630 int txd_vlan_id = 0;
1634 int nr_frags = skb_shinfo(skb)->nr_frags;
1635 struct txd_desc *txdd;
1637 unsigned long flags;
1640 local_irq_save(flags);
1641 if (!spin_trylock(&priv->tx_lock)) {
1642 local_irq_restore(flags);
1643 DBG("%s[%s]: TX locked, returning NETDEV_TX_LOCKED\n",
1644 BDX_DRV_NAME, ndev->name);
1645 return NETDEV_TX_LOCKED;
1648 /* build tx descriptor */
1649 BDX_ASSERT(f->m.wptr >= f->m.memsz); /* started with valid wptr */
1650 txdd = (struct txd_desc *)(f->m.va + f->m.wptr);
1651 if (unlikely(skb->ip_summed != CHECKSUM_PARTIAL))
1654 if (skb_shinfo(skb)->gso_size) {
1655 txd_mss = skb_shinfo(skb)->gso_size;
1657 DBG("skb %p skb len %d gso size = %d\n", skb, skb->len,
1661 if (vlan_tx_tag_present(skb)) {
1662 /*Cut VLAN ID to 12 bits */
1663 txd_vlan_id = vlan_tx_tag_get(skb) & BITS_MASK(12);
1667 txdd->length = CPU_CHIP_SWAP16(skb->len);
1668 txdd->mss = CPU_CHIP_SWAP16(txd_mss);
1670 CPU_CHIP_SWAP32(TXD_W1_VAL
1671 (txd_sizes[nr_frags].qwords, txd_checksum, txd_vtag,
1672 txd_lgsnd, txd_vlan_id));
1673 DBG("=== TxD desc =====================\n");
1674 DBG("=== w1: 0x%x ================\n", txdd->txd_val1);
1675 DBG("=== w2: mss 0x%x len 0x%x\n", txdd->mss, txdd->length);
1677 bdx_tx_map_skb(priv, skb, txdd);
1679 /* increment TXD write pointer. In case of
1680 fifo wrapping copy reminder of the descriptor
1682 f->m.wptr += txd_sizes[nr_frags].bytes;
1683 len = f->m.wptr - f->m.memsz;
1684 if (unlikely(len >= 0)) {
1687 BDX_ASSERT(len > f->m.memsz);
1688 memcpy(f->m.va, f->m.va + f->m.memsz, len);
1691 BDX_ASSERT(f->m.wptr >= f->m.memsz); /* finished with valid wptr */
1693 priv->tx_level -= txd_sizes[nr_frags].bytes;
1694 BDX_ASSERT(priv->tx_level <= 0 || priv->tx_level > BDX_MAX_TX_LEVEL);
1695 #ifdef BDX_DELAY_WPTR
1696 if (priv->tx_level > priv->tx_update_mark) {
1697 /* Force memory writes to complete before letting h/w
1698 know there are new descriptors to fetch.
1699 (might be needed on platforms like IA64)
1701 WRITE_REG(priv, f->m.reg_WPTR, f->m.wptr & TXF_WPTR_WR_PTR);
1703 if (priv->tx_noupd++ > BDX_NO_UPD_PACKETS) {
1705 WRITE_REG(priv, f->m.reg_WPTR,
1706 f->m.wptr & TXF_WPTR_WR_PTR);
1710 /* Force memory writes to complete before letting h/w
1711 know there are new descriptors to fetch.
1712 (might be needed on platforms like IA64)
1714 WRITE_REG(priv, f->m.reg_WPTR, f->m.wptr & TXF_WPTR_WR_PTR);
1717 ndev->trans_start = jiffies;
1719 priv->net_stats.tx_packets++;
1720 priv->net_stats.tx_bytes += skb->len;
1722 if (priv->tx_level < BDX_MIN_TX_LEVEL) {
1723 DBG("%s: %s: TX Q STOP level %d\n",
1724 BDX_DRV_NAME, ndev->name, priv->tx_level);
1725 netif_stop_queue(ndev);
1728 spin_unlock_irqrestore(&priv->tx_lock, flags);
1729 return NETDEV_TX_OK;
1732 /* bdx_tx_cleanup - clean TXF fifo, run in the context of IRQ.
1733 * @priv - bdx adapter
1734 * It scans TXF fifo for descriptors, frees DMA mappings and reports to OS
1735 * that those packets were sent
1737 static void bdx_tx_cleanup(struct bdx_priv *priv)
1739 struct txf_fifo *f = &priv->txf_fifo0;
1740 struct txdb *db = &priv->txdb;
1744 f->m.wptr = READ_REG(priv, f->m.reg_WPTR) & TXF_WPTR_MASK;
1745 BDX_ASSERT(f->m.rptr >= f->m.memsz); /* started with valid rptr */
1747 while (f->m.wptr != f->m.rptr) {
1748 f->m.rptr += BDX_TXF_DESC_SZ;
1749 f->m.rptr &= f->m.size_mask;
1751 /* unmap all the fragments */
1752 /* first has to come tx_maps containing dma */
1753 BDX_ASSERT(db->rptr->len == 0);
1755 BDX_ASSERT(db->rptr->addr.dma == 0);
1756 pci_unmap_page(priv->pdev, db->rptr->addr.dma,
1757 db->rptr->len, PCI_DMA_TODEVICE);
1758 bdx_tx_db_inc_rptr(db);
1759 } while (db->rptr->len > 0);
1760 tx_level -= db->rptr->len; /* '-' koz len is negative */
1762 /* now should come skb pointer - free it */
1763 dev_kfree_skb_irq(db->rptr->addr.skb);
1764 bdx_tx_db_inc_rptr(db);
1767 /* let h/w know which TXF descriptors were cleaned */
1768 BDX_ASSERT((f->m.wptr & TXF_WPTR_WR_PTR) >= f->m.memsz);
1769 WRITE_REG(priv, f->m.reg_RPTR, f->m.rptr & TXF_WPTR_WR_PTR);
1771 /* We reclaimed resources, so in case the Q is stopped by xmit callback,
1772 * we resume the transmition and use tx_lock to synchronize with xmit.*/
1773 spin_lock(&priv->tx_lock);
1774 priv->tx_level += tx_level;
1775 BDX_ASSERT(priv->tx_level <= 0 || priv->tx_level > BDX_MAX_TX_LEVEL);
1776 #ifdef BDX_DELAY_WPTR
1777 if (priv->tx_noupd) {
1779 WRITE_REG(priv, priv->txd_fifo0.m.reg_WPTR,
1780 priv->txd_fifo0.m.wptr & TXF_WPTR_WR_PTR);
1784 if (unlikely(netif_queue_stopped(priv->ndev)
1785 && netif_carrier_ok(priv->ndev)
1786 && (priv->tx_level >= BDX_MIN_TX_LEVEL))) {
1787 DBG("%s: %s: TX Q WAKE level %d\n",
1788 BDX_DRV_NAME, priv->ndev->name, priv->tx_level);
1789 netif_wake_queue(priv->ndev);
1791 spin_unlock(&priv->tx_lock);
1794 /* bdx_tx_free_skbs - frees all skbs from TXD fifo.
1795 * It gets called when OS stops this dev, eg upon "ifconfig down" or rmmod
1797 static void bdx_tx_free_skbs(struct bdx_priv *priv)
1799 struct txdb *db = &priv->txdb;
1802 while (db->rptr != db->wptr) {
1803 if (likely(db->rptr->len))
1804 pci_unmap_page(priv->pdev, db->rptr->addr.dma,
1805 db->rptr->len, PCI_DMA_TODEVICE);
1807 dev_kfree_skb(db->rptr->addr.skb);
1808 bdx_tx_db_inc_rptr(db);
1813 /* bdx_tx_free - frees all Tx resources */
1814 static void bdx_tx_free(struct bdx_priv *priv)
1817 bdx_tx_free_skbs(priv);
1818 bdx_fifo_free(priv, &priv->txd_fifo0.m);
1819 bdx_fifo_free(priv, &priv->txf_fifo0.m);
1820 bdx_tx_db_close(&priv->txdb);
1823 /* bdx_tx_push_desc - push descriptor to TxD fifo
1824 * @priv - NIC private structure
1825 * @data - desc's data
1826 * @size - desc's size
1828 * Pushes desc to TxD fifo and overlaps it if needed.
1829 * NOTE: this func does not check for available space. this is responsibility
1830 * of the caller. Neither does it check that data size is smaller then
1833 static void bdx_tx_push_desc(struct bdx_priv *priv, void *data, int size)
1835 struct txd_fifo *f = &priv->txd_fifo0;
1836 int i = f->m.memsz - f->m.wptr;
1842 memcpy(f->m.va + f->m.wptr, data, size);
1845 memcpy(f->m.va + f->m.wptr, data, i);
1846 f->m.wptr = size - i;
1847 memcpy(f->m.va, data + i, f->m.wptr);
1849 WRITE_REG(priv, f->m.reg_WPTR, f->m.wptr & TXF_WPTR_WR_PTR);
1852 /* bdx_tx_push_desc_safe - push descriptor to TxD fifo in a safe way
1853 * @priv - NIC private structure
1854 * @data - desc's data
1855 * @size - desc's size
1857 * NOTE: this func does check for available space and, if neccessary, waits for
1858 * NIC to read existing data before writing new one.
1860 static void bdx_tx_push_desc_safe(struct bdx_priv *priv, void *data, int size)
1866 /* we substruct 8 because when fifo is full rptr == wptr
1867 which also means that fifo is empty, we can understand
1868 the difference, but could hw do the same ??? :) */
1869 int avail = bdx_tx_space(priv) - 8;
1871 if (timer++ > 300) { /* prevent endless loop */
1872 DBG("timeout while writing desc to TxD fifo\n");
1875 udelay(50); /* give hw a chance to clean fifo */
1878 avail = MIN(avail, size);
1879 DBG("about to push %d bytes starting %p size %d\n", avail,
1881 bdx_tx_push_desc(priv, data, avail);
1889 * bdx_probe - Device Initialization Routine
1890 * @pdev: PCI device information struct
1891 * @ent: entry in bdx_pci_tbl
1893 * Returns 0 on success, negative on failure
1895 * bdx_probe initializes an adapter identified by a pci_dev structure.
1896 * The OS initialization, configuring of the adapter private structure,
1897 * and a hardware reset occur.
1899 * functions and their order used as explained in
1900 * /usr/src/linux/Documentation/DMA-{API,mapping}.txt
1904 /* TBD: netif_msg should be checked and implemented. I disable it for now */
1905 static int __devinit
1906 bdx_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1908 struct net_device *ndev;
1909 struct bdx_priv *priv;
1910 int err, pci_using_dac, port;
1911 unsigned long pciaddr;
1913 struct pci_nic *nic;
1917 nic = vmalloc(sizeof(*nic));
1921 /************** pci *****************/
1922 if ((err = pci_enable_device(pdev))) /* it trigers interrupt, dunno why. */
1923 goto err_pci; /* it's not a problem though */
1925 if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) &&
1926 !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) {
1929 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
1930 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) {
1931 printk(KERN_ERR "tehuti: No usable DMA configuration"
1938 if ((err = pci_request_regions(pdev, BDX_DRV_NAME)))
1941 pci_set_master(pdev);
1943 pciaddr = pci_resource_start(pdev, 0);
1946 ERR("tehuti: no MMIO resource\n");
1949 if ((regionSize = pci_resource_len(pdev, 0)) < BDX_REGS_SIZE) {
1951 ERR("tehuti: MMIO resource (%x) too small\n", regionSize);
1955 nic->regs = ioremap(pciaddr, regionSize);
1958 ERR("tehuti: ioremap failed\n");
1962 if (pdev->irq < 2) {
1964 ERR("tehuti: invalid irq (%d)\n", pdev->irq);
1967 pci_set_drvdata(pdev, nic);
1969 if (pdev->device == 0x3014)
1976 bdx_hw_reset_direct(nic->regs);
1978 nic->irq_type = IRQ_INTX;
1980 if ((readl(nic->regs + FPGA_VER) & 0xFFF) >= 378) {
1981 if ((err = pci_enable_msi(pdev)))
1982 ERR("Tehuti: Can't eneble msi. error is %d\n", err);
1984 nic->irq_type = IRQ_MSI;
1986 DBG("HW does not support MSI\n");
1989 /************** netdev **************/
1990 for (port = 0; port < nic->port_num; port++) {
1991 if (!(ndev = alloc_etherdev(sizeof(struct bdx_priv)))) {
1993 printk(KERN_ERR "tehuti: alloc_etherdev failed\n");
1997 ndev->open = bdx_open;
1998 ndev->stop = bdx_close;
1999 ndev->hard_start_xmit = bdx_tx_transmit;
2000 ndev->do_ioctl = bdx_ioctl;
2001 ndev->set_multicast_list = bdx_setmulti;
2002 ndev->get_stats = bdx_get_stats;
2003 ndev->change_mtu = bdx_change_mtu;
2004 ndev->set_mac_address = bdx_set_mac;
2005 ndev->tx_queue_len = BDX_NDEV_TXQ_LEN;
2006 ndev->vlan_rx_register = bdx_vlan_rx_register;
2007 ndev->vlan_rx_add_vid = bdx_vlan_rx_add_vid;
2008 ndev->vlan_rx_kill_vid = bdx_vlan_rx_kill_vid;
2010 bdx_ethtool_ops(ndev); /* ethtool interface */
2012 /* these fields are used for info purposes only
2013 * so we can have them same for all ports of the board */
2014 ndev->if_port = port;
2015 ndev->base_addr = pciaddr;
2016 ndev->mem_start = pciaddr;
2017 ndev->mem_end = pciaddr + regionSize;
2018 ndev->irq = pdev->irq;
2019 ndev->features = NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_TSO
2020 | NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
2021 NETIF_F_HW_VLAN_FILTER
2022 /*| NETIF_F_FRAGLIST */
2026 ndev->features |= NETIF_F_HIGHDMA;
2028 /************** priv ****************/
2029 priv = nic->priv[port] = ndev->priv;
2031 memset(priv, 0, sizeof(struct bdx_priv));
2032 priv->pBdxRegs = nic->regs + port * 0x8000;
2037 priv->msg_enable = BDX_DEF_MSG_ENABLE;
2039 netif_napi_add(ndev, &priv->napi, bdx_poll, 64);
2041 if ((readl(nic->regs + FPGA_VER) & 0xFFF) == 308) {
2042 DBG("HW statistics not supported\n");
2043 priv->stats_flag = 0;
2045 priv->stats_flag = 1;
2048 /* Initialize fifo sizes. */
2054 /* Initialize the initial coalescing registers. */
2055 priv->rdintcm = INT_REG_VAL(0x20, 1, 4, 12);
2056 priv->tdintcm = INT_REG_VAL(0x20, 1, 0, 12);
2058 /* ndev->xmit_lock spinlock is not used.
2059 * Private priv->tx_lock is used for synchronization
2060 * between transmit and TX irq cleanup. In addition
2061 * set multicast list callback has to use priv->tx_lock.
2064 ndev->features |= NETIF_F_LLTX;
2066 spin_lock_init(&priv->tx_lock);
2068 /*bdx_hw_reset(priv); */
2069 if (bdx_read_mac(priv)) {
2070 printk(KERN_ERR "tehuti: load MAC address failed\n");
2073 SET_NETDEV_DEV(ndev, &pdev->dev);
2074 if ((err = register_netdev(ndev))) {
2075 printk(KERN_ERR "tehuti: register_netdev failed\n");
2078 netif_carrier_off(ndev);
2079 netif_stop_queue(ndev);
2090 pci_release_regions(pdev);
2092 pci_disable_device(pdev);
2099 /****************** Ethtool interface *********************/
2100 /* get strings for tests */
2102 bdx_test_names[][ETH_GSTRING_LEN] = {
2106 /* get strings for statistics counters */
2108 bdx_stat_names[][ETH_GSTRING_LEN] = {
2109 "InUCast", /* 0x7200 */
2110 "InMCast", /* 0x7210 */
2111 "InBCast", /* 0x7220 */
2112 "InPkts", /* 0x7230 */
2113 "InErrors", /* 0x7240 */
2114 "InDropped", /* 0x7250 */
2115 "FrameTooLong", /* 0x7260 */
2116 "FrameSequenceErrors", /* 0x7270 */
2117 "InVLAN", /* 0x7280 */
2118 "InDroppedDFE", /* 0x7290 */
2119 "InDroppedIntFull", /* 0x72A0 */
2120 "InFrameAlignErrors", /* 0x72B0 */
2122 /* 0x72C0-0x72E0 RSRV */
2124 "OutUCast", /* 0x72F0 */
2125 "OutMCast", /* 0x7300 */
2126 "OutBCast", /* 0x7310 */
2127 "OutPkts", /* 0x7320 */
2129 /* 0x7330-0x7360 RSRV */
2131 "OutVLAN", /* 0x7370 */
2132 "InUCastOctects", /* 0x7380 */
2133 "OutUCastOctects", /* 0x7390 */
2135 /* 0x73A0-0x73B0 RSRV */
2137 "InBCastOctects", /* 0x73C0 */
2138 "OutBCastOctects", /* 0x73D0 */
2139 "InOctects", /* 0x73E0 */
2140 "OutOctects", /* 0x73F0 */
2144 * bdx_get_settings - get device-specific settings
2148 static int bdx_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
2152 struct bdx_priv *priv = netdev->priv;
2154 rdintcm = priv->rdintcm;
2155 tdintcm = priv->tdintcm;
2157 ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
2158 ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE);
2159 ecmd->speed = SPEED_10000;
2160 ecmd->duplex = DUPLEX_FULL;
2161 ecmd->port = PORT_FIBRE;
2162 ecmd->transceiver = XCVR_EXTERNAL; /* what does it mean? */
2163 ecmd->autoneg = AUTONEG_DISABLE;
2165 /* PCK_TH measures in multiples of FIFO bytes
2166 We translate to packets */
2168 ((GET_PCK_TH(tdintcm) * PCK_TH_MULT) / BDX_TXF_DESC_SZ);
2170 ((GET_PCK_TH(rdintcm) * PCK_TH_MULT) / sizeof(struct rxf_desc));
2176 * bdx_get_drvinfo - report driver information
2181 bdx_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *drvinfo)
2183 struct bdx_priv *priv = netdev->priv;
2185 strlcat(drvinfo->driver, BDX_DRV_NAME, sizeof(drvinfo->driver));
2186 strlcat(drvinfo->version, BDX_DRV_VERSION, sizeof(drvinfo->version));
2187 strlcat(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
2188 strlcat(drvinfo->bus_info, pci_name(priv->pdev),
2189 sizeof(drvinfo->bus_info));
2191 drvinfo->n_stats = ((priv->stats_flag) ? ARRAY_SIZE(bdx_stat_names) : 0);
2192 drvinfo->testinfo_len = 0;
2193 drvinfo->regdump_len = 0;
2194 drvinfo->eedump_len = 0;
2198 * bdx_get_rx_csum - report whether receive checksums are turned on or off
2201 static u32 bdx_get_rx_csum(struct net_device *netdev)
2203 return 1; /* always on */
2207 * bdx_get_tx_csum - report whether transmit checksums are turned on or off
2210 static u32 bdx_get_tx_csum(struct net_device *netdev)
2212 return (netdev->features & NETIF_F_IP_CSUM) != 0;
2216 * bdx_get_coalesce - get interrupt coalescing parameters
2221 bdx_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *ecoal)
2225 struct bdx_priv *priv = netdev->priv;
2227 rdintcm = priv->rdintcm;
2228 tdintcm = priv->tdintcm;
2230 /* PCK_TH measures in multiples of FIFO bytes
2231 We translate to packets */
2232 ecoal->rx_coalesce_usecs = GET_INT_COAL(rdintcm) * INT_COAL_MULT;
2233 ecoal->rx_max_coalesced_frames =
2234 ((GET_PCK_TH(rdintcm) * PCK_TH_MULT) / sizeof(struct rxf_desc));
2236 ecoal->tx_coalesce_usecs = GET_INT_COAL(tdintcm) * INT_COAL_MULT;
2237 ecoal->tx_max_coalesced_frames =
2238 ((GET_PCK_TH(tdintcm) * PCK_TH_MULT) / BDX_TXF_DESC_SZ);
2240 /* adaptive parameters ignored */
2245 * bdx_set_coalesce - set interrupt coalescing parameters
2250 bdx_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *ecoal)
2254 struct bdx_priv *priv = netdev->priv;
2260 /* Check for valid input */
2261 rx_coal = ecoal->rx_coalesce_usecs / INT_COAL_MULT;
2262 tx_coal = ecoal->tx_coalesce_usecs / INT_COAL_MULT;
2263 rx_max_coal = ecoal->rx_max_coalesced_frames;
2264 tx_max_coal = ecoal->tx_max_coalesced_frames;
2266 /* Translate from packets to multiples of FIFO bytes */
2268 (((rx_max_coal * sizeof(struct rxf_desc)) + PCK_TH_MULT - 1)
2271 (((tx_max_coal * BDX_TXF_DESC_SZ) + PCK_TH_MULT - 1)
2274 if ((rx_coal > 0x7FFF) || (tx_coal > 0x7FFF)
2275 || (rx_max_coal > 0xF) || (tx_max_coal > 0xF))
2278 rdintcm = INT_REG_VAL(rx_coal, GET_INT_COAL_RC(priv->rdintcm),
2279 GET_RXF_TH(priv->rdintcm), rx_max_coal);
2280 tdintcm = INT_REG_VAL(tx_coal, GET_INT_COAL_RC(priv->tdintcm), 0,
2283 priv->rdintcm = rdintcm;
2284 priv->tdintcm = tdintcm;
2286 WRITE_REG(priv, regRDINTCM0, rdintcm);
2287 WRITE_REG(priv, regTDINTCM0, tdintcm);
2292 /* Convert RX fifo size to number of pending packets */
2293 static inline int bdx_rx_fifo_size_to_packets(int rx_size)
2295 return ((FIFO_SIZE * (1 << rx_size)) / sizeof(struct rxf_desc));
2298 /* Convert TX fifo size to number of pending packets */
2299 static inline int bdx_tx_fifo_size_to_packets(int tx_size)
2301 return ((FIFO_SIZE * (1 << tx_size)) / BDX_TXF_DESC_SZ);
2305 * bdx_get_ringparam - report ring sizes
2310 bdx_get_ringparam(struct net_device *netdev, struct ethtool_ringparam *ring)
2312 struct bdx_priv *priv = netdev->priv;
2314 /*max_pending - the maximum-sized FIFO we allow */
2315 ring->rx_max_pending = bdx_rx_fifo_size_to_packets(3);
2316 ring->tx_max_pending = bdx_tx_fifo_size_to_packets(3);
2317 ring->rx_pending = bdx_rx_fifo_size_to_packets(priv->rxf_size);
2318 ring->tx_pending = bdx_tx_fifo_size_to_packets(priv->txd_size);
2322 * bdx_set_ringparam - set ring sizes
2327 bdx_set_ringparam(struct net_device *netdev, struct ethtool_ringparam *ring)
2329 struct bdx_priv *priv = netdev->priv;
2333 for (; rx_size < 4; rx_size++) {
2334 if (bdx_rx_fifo_size_to_packets(rx_size) >= ring->rx_pending)
2340 for (; tx_size < 4; tx_size++) {
2341 if (bdx_tx_fifo_size_to_packets(tx_size) >= ring->tx_pending)
2347 /*Is there anything to do? */
2348 if ((rx_size == priv->rxf_size)
2349 && (tx_size == priv->txd_size))
2352 priv->rxf_size = rx_size;
2354 priv->rxd_size = rx_size - 1;
2356 priv->rxd_size = rx_size;
2358 priv->txf_size = priv->txd_size = tx_size;
2360 if (netif_running(netdev)) {
2368 * bdx_get_strings - return a set of strings that describe the requested objects
2372 static void bdx_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
2374 switch (stringset) {
2376 memcpy(data, *bdx_test_names, sizeof(bdx_test_names));
2379 memcpy(data, *bdx_stat_names, sizeof(bdx_stat_names));
2385 * bdx_get_stats_count - return number of 64bit statistics counters
2388 static int bdx_get_stats_count(struct net_device *netdev)
2390 struct bdx_priv *priv = netdev->priv;
2391 BDX_ASSERT(ARRAY_SIZE(bdx_stat_names)
2392 != sizeof(struct bdx_stats) / sizeof(u64));
2393 return ((priv->stats_flag) ? ARRAY_SIZE(bdx_stat_names) : 0);
2397 * bdx_get_ethtool_stats - return device's hardware L2 statistics
2402 static void bdx_get_ethtool_stats(struct net_device *netdev,
2403 struct ethtool_stats *stats, u64 *data)
2405 struct bdx_priv *priv = netdev->priv;
2407 if (priv->stats_flag) {
2409 /* Update stats from HW */
2410 bdx_update_stats(priv);
2412 /* Copy data to user buffer */
2413 memcpy(data, &priv->hw_stats, sizeof(priv->hw_stats));
2418 * bdx_ethtool_ops - ethtool interface implementation
2421 static void bdx_ethtool_ops(struct net_device *netdev)
2423 static struct ethtool_ops bdx_ethtool_ops = {
2424 .get_settings = bdx_get_settings,
2425 .get_drvinfo = bdx_get_drvinfo,
2426 .get_link = ethtool_op_get_link,
2427 .get_coalesce = bdx_get_coalesce,
2428 .set_coalesce = bdx_set_coalesce,
2429 .get_ringparam = bdx_get_ringparam,
2430 .set_ringparam = bdx_set_ringparam,
2431 .get_rx_csum = bdx_get_rx_csum,
2432 .get_tx_csum = bdx_get_tx_csum,
2433 .get_sg = ethtool_op_get_sg,
2434 .get_tso = ethtool_op_get_tso,
2435 .get_strings = bdx_get_strings,
2436 .get_stats_count = bdx_get_stats_count,
2437 .get_ethtool_stats = bdx_get_ethtool_stats,
2440 SET_ETHTOOL_OPS(netdev, &bdx_ethtool_ops);
2444 * bdx_remove - Device Removal Routine
2445 * @pdev: PCI device information struct
2447 * bdx_remove is called by the PCI subsystem to alert the driver
2448 * that it should release a PCI device. The could be caused by a
2449 * Hot-Plug event, or because the driver is going to be removed from
2452 static void __devexit bdx_remove(struct pci_dev *pdev)
2454 struct pci_nic *nic = pci_get_drvdata(pdev);
2455 struct net_device *ndev;
2458 for (port = 0; port < nic->port_num; port++) {
2459 ndev = nic->priv[port]->ndev;
2460 unregister_netdev(ndev);
2464 /*bdx_hw_reset_direct(nic->regs); */
2466 if (nic->irq_type == IRQ_MSI)
2467 pci_disable_msi(pdev);
2471 pci_release_regions(pdev);
2472 pci_disable_device(pdev);
2473 pci_set_drvdata(pdev, NULL);
2479 static struct pci_driver bdx_pci_driver = {
2480 .name = BDX_DRV_NAME,
2481 .id_table = bdx_pci_tbl,
2483 .remove = __devexit_p(bdx_remove),
2487 * print_driver_id - print parameters of the driver build
2489 static void __init print_driver_id(void)
2491 printk(KERN_INFO "%s: %s, %s\n", BDX_DRV_NAME, BDX_DRV_DESC,
2493 printk(KERN_INFO "%s: Options: hw_csum %s\n", BDX_DRV_NAME,
2497 static int __init bdx_module_init(void)
2500 bdx_firmware_endianess();
2503 RET(pci_register_driver(&bdx_pci_driver));
2506 module_init(bdx_module_init);
2508 static void __exit bdx_module_exit(void)
2511 pci_unregister_driver(&bdx_pci_driver);
2515 module_exit(bdx_module_exit);
2517 MODULE_LICENSE("GPL");
2518 MODULE_AUTHOR(DRIVER_AUTHOR);
2519 MODULE_DESCRIPTION(BDX_DRV_DESC);