| /* |
| * Tehuti Networks(R) Network Driver |
| * ethtool interface implementation |
| * Copyright (C) 2007 Tehuti Networks Ltd. All rights reserved |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| */ |
| |
| /* |
| * RX HW/SW interaction overview |
| * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| * There are 2 types of RX communication channels between driver and NIC. |
| * 1) RX Free Fifo - RXF - holds descriptors of empty buffers to accept incoming |
| * traffic. This Fifo is filled by SW and is readen by HW. Each descriptor holds |
| * info about buffer's location, size and ID. An ID field is used to identify a |
| * buffer when it's returned with data via RXD Fifo (see below) |
| * 2) RX Data Fifo - RXD - holds descriptors of full buffers. This Fifo is |
| * filled by HW and is readen by SW. Each descriptor holds status and ID. |
| * HW pops descriptor from RXF Fifo, stores ID, fills buffer with incoming data, |
| * via dma moves it into host memory, builds new RXD descriptor with same ID, |
| * pushes it into RXD Fifo and raises interrupt to indicate new RX data. |
| * |
| * Current NIC configuration (registers + firmware) makes NIC use 2 RXF Fifos. |
| * One holds 1.5K packets and another - 26K packets. Depending on incoming |
| * packet size, HW desides on a RXF Fifo to pop buffer from. When packet is |
| * filled with data, HW builds new RXD descriptor for it and push it into single |
| * RXD Fifo. |
| * |
| * RX SW Data Structures |
| * ~~~~~~~~~~~~~~~~~~~~~ |
| * skb db - used to keep track of all skbs owned by SW and their dma addresses. |
| * For RX case, ownership lasts from allocating new empty skb for RXF until |
| * accepting full skb from RXD and passing it to OS. Each RXF Fifo has its own |
| * skb db. Implemented as array with bitmask. |
| * fifo - keeps info about fifo's size and location, relevant HW registers, |
| * usage and skb db. Each RXD and RXF Fifo has its own fifo structure. |
| * Implemented as simple struct. |
| * |
| * RX SW Execution Flow |
| * ~~~~~~~~~~~~~~~~~~~~ |
| * Upon initialization (ifconfig up) driver creates RX fifos and initializes |
| * relevant registers. At the end of init phase, driver enables interrupts. |
| * NIC sees that there is no RXF buffers and raises |
| * RD_INTR interrupt, isr fills skbs and Rx begins. |
| * Driver has two receive operation modes: |
| * NAPI - interrupt-driven mixed with polling |
| * interrupt-driven only |
| * |
| * Interrupt-driven only flow is following. When buffer is ready, HW raises |
| * interrupt and isr is called. isr collects all available packets |
| * (bdx_rx_receive), refills skbs (bdx_rx_alloc_skbs) and exit. |
| |
| * Rx buffer allocation note |
| * ~~~~~~~~~~~~~~~~~~~~~~~~~ |
| * Driver cares to feed such amount of RxF descriptors that respective amount of |
| * RxD descriptors can not fill entire RxD fifo. The main reason is lack of |
| * overflow check in Bordeaux for RxD fifo free/used size. |
| * FIXME: this is NOT fully implemented, more work should be done |
| * |
| */ |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include "tehuti.h" |
| |
| static DEFINE_PCI_DEVICE_TABLE(bdx_pci_tbl) = { |
| { PCI_VDEVICE(TEHUTI, 0x3009), }, |
| { PCI_VDEVICE(TEHUTI, 0x3010), }, |
| { PCI_VDEVICE(TEHUTI, 0x3014), }, |
| { 0 } |
| }; |
| |
| MODULE_DEVICE_TABLE(pci, bdx_pci_tbl); |
| |
| /* Definitions needed by ISR or NAPI functions */ |
| static void bdx_rx_alloc_skbs(struct bdx_priv *priv, struct rxf_fifo *f); |
| static void bdx_tx_cleanup(struct bdx_priv *priv); |
| static int bdx_rx_receive(struct bdx_priv *priv, struct rxd_fifo *f, int budget); |
| |
| /* Definitions needed by FW loading */ |
| static void bdx_tx_push_desc_safe(struct bdx_priv *priv, void *data, int size); |
| |
| /* Definitions needed by hw_start */ |
| static int bdx_tx_init(struct bdx_priv *priv); |
| static int bdx_rx_init(struct bdx_priv *priv); |
| |
| /* Definitions needed by bdx_close */ |
| static void bdx_rx_free(struct bdx_priv *priv); |
| static void bdx_tx_free(struct bdx_priv *priv); |
| |
| /* Definitions needed by bdx_probe */ |
| static void bdx_set_ethtool_ops(struct net_device *netdev); |
| |
| /************************************************************************* |
| * Print Info * |
| *************************************************************************/ |
| |
| static void print_hw_id(struct pci_dev *pdev) |
| { |
| struct pci_nic *nic = pci_get_drvdata(pdev); |
| u16 pci_link_status = 0; |
| u16 pci_ctrl = 0; |
| |
| pci_read_config_word(pdev, PCI_LINK_STATUS_REG, &pci_link_status); |
| pci_read_config_word(pdev, PCI_DEV_CTRL_REG, &pci_ctrl); |
| |
| pr_info("%s%s\n", BDX_NIC_NAME, |
| nic->port_num == 1 ? "" : ", 2-Port"); |
| pr_info("srom 0x%x fpga %d build %u lane# %d max_pl 0x%x mrrs 0x%x\n", |
| readl(nic->regs + SROM_VER), readl(nic->regs + FPGA_VER) & 0xFFF, |
| readl(nic->regs + FPGA_SEED), |
| GET_LINK_STATUS_LANES(pci_link_status), |
| GET_DEV_CTRL_MAXPL(pci_ctrl), GET_DEV_CTRL_MRRS(pci_ctrl)); |
| } |
| |
| static void print_fw_id(struct pci_nic *nic) |
| { |
| pr_info("fw 0x%x\n", readl(nic->regs + FW_VER)); |
| } |
| |
| static void print_eth_id(struct net_device *ndev) |
| { |
| netdev_info(ndev, "%s, Port %c\n", |
| BDX_NIC_NAME, (ndev->if_port == 0) ? 'A' : 'B'); |
| |
| } |
| |
| /************************************************************************* |
| * Code * |
| *************************************************************************/ |
| |
| #define bdx_enable_interrupts(priv) \ |
| do { WRITE_REG(priv, regIMR, IR_RUN); } while (0) |
| #define bdx_disable_interrupts(priv) \ |
| do { WRITE_REG(priv, regIMR, 0); } while (0) |
| |
| /** |
| * bdx_fifo_init - create TX/RX descriptor fifo for host-NIC communication. |
| * @priv: NIC private structure |
| * @f: fifo to initialize |
| * @fsz_type: fifo size type: 0-4KB, 1-8KB, 2-16KB, 3-32KB |
| * @reg_XXX: offsets of registers relative to base address |
| * |
| * 1K extra space is allocated at the end of the fifo to simplify |
| * processing of descriptors that wraps around fifo's end |
| * |
| * Returns 0 on success, negative value on failure |
| * |
| */ |
| static int |
| bdx_fifo_init(struct bdx_priv *priv, struct fifo *f, int fsz_type, |
| u16 reg_CFG0, u16 reg_CFG1, u16 reg_RPTR, u16 reg_WPTR) |
| { |
| u16 memsz = FIFO_SIZE * (1 << fsz_type); |
| |
| memset(f, 0, sizeof(struct fifo)); |
| /* pci_alloc_consistent gives us 4k-aligned memory */ |
| f->va = pci_alloc_consistent(priv->pdev, |
| memsz + FIFO_EXTRA_SPACE, &f->da); |
| if (!f->va) { |
| pr_err("pci_alloc_consistent failed\n"); |
| RET(-ENOMEM); |
| } |
| f->reg_CFG0 = reg_CFG0; |
| f->reg_CFG1 = reg_CFG1; |
| f->reg_RPTR = reg_RPTR; |
| f->reg_WPTR = reg_WPTR; |
| f->rptr = 0; |
| f->wptr = 0; |
| f->memsz = memsz; |
| f->size_mask = memsz - 1; |
| WRITE_REG(priv, reg_CFG0, (u32) ((f->da & TX_RX_CFG0_BASE) | fsz_type)); |
| WRITE_REG(priv, reg_CFG1, H32_64(f->da)); |
| |
| RET(0); |
| } |
| |
| /** |
| * bdx_fifo_free - free all resources used by fifo |
| * @priv: NIC private structure |
| * @f: fifo to release |
| */ |
| static void bdx_fifo_free(struct bdx_priv *priv, struct fifo *f) |
| { |
| ENTER; |
| if (f->va) { |
| pci_free_consistent(priv->pdev, |
| f->memsz + FIFO_EXTRA_SPACE, f->va, f->da); |
| f->va = NULL; |
| } |
| RET(); |
| } |
| |
| /** |
| * bdx_link_changed - notifies OS about hw link state. |
| * @priv: hw adapter structure |
| */ |
| static void bdx_link_changed(struct bdx_priv *priv) |
| { |
| u32 link = READ_REG(priv, regMAC_LNK_STAT) & MAC_LINK_STAT; |
| |
| if (!link) { |
| if (netif_carrier_ok(priv->ndev)) { |
| netif_stop_queue(priv->ndev); |
| netif_carrier_off(priv->ndev); |
| netdev_err(priv->ndev, "Link Down\n"); |
| } |
| } else { |
| if (!netif_carrier_ok(priv->ndev)) { |
| netif_wake_queue(priv->ndev); |
| netif_carrier_on(priv->ndev); |
| netdev_err(priv->ndev, "Link Up\n"); |
| } |
| } |
| } |
| |
| static void bdx_isr_extra(struct bdx_priv *priv, u32 isr) |
| { |
| if (isr & IR_RX_FREE_0) { |
| bdx_rx_alloc_skbs(priv, &priv->rxf_fifo0); |
| DBG("RX_FREE_0\n"); |
| } |
| |
| if (isr & IR_LNKCHG0) |
| bdx_link_changed(priv); |
| |
| if (isr & IR_PCIE_LINK) |
| netdev_err(priv->ndev, "PCI-E Link Fault\n"); |
| |
| if (isr & IR_PCIE_TOUT) |
| netdev_err(priv->ndev, "PCI-E Time Out\n"); |
| |
| } |
| |
| /** |
| * bdx_isr_napi - Interrupt Service Routine for Bordeaux NIC |
| * @irq: interrupt number |
| * @dev: network device |
| * |
| * Return IRQ_NONE if it was not our interrupt, IRQ_HANDLED - otherwise |
| * |
| * It reads ISR register to know interrupt reasons, and proceed them one by one. |
| * Reasons of interest are: |
| * RX_DESC - new packet has arrived and RXD fifo holds its descriptor |
| * RX_FREE - number of free Rx buffers in RXF fifo gets low |
| * TX_FREE - packet was transmited and RXF fifo holds its descriptor |
| */ |
| |
| static irqreturn_t bdx_isr_napi(int irq, void *dev) |
| { |
| struct net_device *ndev = dev; |
| struct bdx_priv *priv = netdev_priv(ndev); |
| u32 isr; |
| |
| ENTER; |
| isr = (READ_REG(priv, regISR) & IR_RUN); |
| if (unlikely(!isr)) { |
| bdx_enable_interrupts(priv); |
| return IRQ_NONE; /* Not our interrupt */ |
| } |
| |
| if (isr & IR_EXTRA) |
| bdx_isr_extra(priv, isr); |
| |
| if (isr & (IR_RX_DESC_0 | IR_TX_FREE_0)) { |
| if (likely(napi_schedule_prep(&priv->napi))) { |
| __napi_schedule(&priv->napi); |
| RET(IRQ_HANDLED); |
| } else { |
| /* NOTE: we get here if intr has slipped into window |
| * between these lines in bdx_poll: |
| * bdx_enable_interrupts(priv); |
| * return 0; |
| * currently intrs are disabled (since we read ISR), |
| * and we have failed to register next poll. |
| * so we read the regs to trigger chip |
| * and allow further interupts. */ |
| READ_REG(priv, regTXF_WPTR_0); |
| READ_REG(priv, regRXD_WPTR_0); |
| } |
| } |
| |
| bdx_enable_interrupts(priv); |
| RET(IRQ_HANDLED); |
| } |
| |
| static int bdx_poll(struct napi_struct *napi, int budget) |
| { |
| struct bdx_priv *priv = container_of(napi, struct bdx_priv, napi); |
| int work_done; |
| |
| ENTER; |
| bdx_tx_cleanup(priv); |
| work_done = bdx_rx_receive(priv, &priv->rxd_fifo0, budget); |
| if ((work_done < budget) || |
| (priv->napi_stop++ >= 30)) { |
| DBG("rx poll is done. backing to isr-driven\n"); |
| |
| /* from time to time we exit to let NAPI layer release |
| * device lock and allow waiting tasks (eg rmmod) to advance) */ |
| priv->napi_stop = 0; |
| |
| napi_complete(napi); |
| bdx_enable_interrupts(priv); |
| } |
| return work_done; |
| } |
| |
| /** |
| * bdx_fw_load - loads firmware to NIC |
| * @priv: NIC private structure |
| * |
| * Firmware is loaded via TXD fifo, so it must be initialized first. |
| * Firware must be loaded once per NIC not per PCI device provided by NIC (NIC |
| * can have few of them). So all drivers use semaphore register to choose one |
| * that will actually load FW to NIC. |
| */ |
| |
| static int bdx_fw_load(struct bdx_priv *priv) |
| { |
| const struct firmware *fw = NULL; |
| int master, i; |
| int rc; |
| |
| ENTER; |
| master = READ_REG(priv, regINIT_SEMAPHORE); |
| if (!READ_REG(priv, regINIT_STATUS) && master) { |
| rc = request_firmware(&fw, "tehuti/bdx.bin", &priv->pdev->dev); |
| if (rc) |
| goto out; |
| bdx_tx_push_desc_safe(priv, (char *)fw->data, fw->size); |
| mdelay(100); |
| } |
| for (i = 0; i < 200; i++) { |
| if (READ_REG(priv, regINIT_STATUS)) { |
| rc = 0; |
| goto out; |
| } |
| mdelay(2); |
| } |
| rc = -EIO; |
| out: |
| if (master) |
| WRITE_REG(priv, regINIT_SEMAPHORE, 1); |
| |
| release_firmware(fw); |
| |
| if (rc) { |
| netdev_err(priv->ndev, "firmware loading failed\n"); |
| if (rc == -EIO) |
| DBG("VPC = 0x%x VIC = 0x%x INIT_STATUS = 0x%x i=%d\n", |
| READ_REG(priv, regVPC), |
| READ_REG(priv, regVIC), |
| READ_REG(priv, regINIT_STATUS), i); |
| RET(rc); |
| } else { |
| DBG("%s: firmware loading success\n", priv->ndev->name); |
| RET(0); |
| } |
| } |
| |
| static void bdx_restore_mac(struct net_device *ndev, struct bdx_priv *priv) |
| { |
| u32 val; |
| |
| ENTER; |
| DBG("mac0=%x mac1=%x mac2=%x\n", |
| READ_REG(priv, regUNC_MAC0_A), |
| READ_REG(priv, regUNC_MAC1_A), READ_REG(priv, regUNC_MAC2_A)); |
| |
| val = (ndev->dev_addr[0] << 8) | (ndev->dev_addr[1]); |
| WRITE_REG(priv, regUNC_MAC2_A, val); |
| val = (ndev->dev_addr[2] << 8) | (ndev->dev_addr[3]); |
| WRITE_REG(priv, regUNC_MAC1_A, val); |
| val = (ndev->dev_addr[4] << 8) | (ndev->dev_addr[5]); |
| WRITE_REG(priv, regUNC_MAC0_A, val); |
| |
| DBG("mac0=%x mac1=%x mac2=%x\n", |
| READ_REG(priv, regUNC_MAC0_A), |
| READ_REG(priv, regUNC_MAC1_A), READ_REG(priv, regUNC_MAC2_A)); |
| RET(); |
| } |
| |
| /** |
| * bdx_hw_start - inits registers and starts HW's Rx and Tx engines |
| * @priv: NIC private structure |
| */ |
| static int bdx_hw_start(struct bdx_priv *priv) |
| { |
| int rc = -EIO; |
| struct net_device *ndev = priv->ndev; |
| |
| ENTER; |
| bdx_link_changed(priv); |
| |
| /* 10G overall max length (vlan, eth&ip header, ip payload, crc) */ |
| WRITE_REG(priv, regFRM_LENGTH, 0X3FE0); |
| WRITE_REG(priv, regPAUSE_QUANT, 0x96); |
| WRITE_REG(priv, regRX_FIFO_SECTION, 0x800010); |
| WRITE_REG(priv, regTX_FIFO_SECTION, 0xE00010); |
| WRITE_REG(priv, regRX_FULLNESS, 0); |
| WRITE_REG(priv, regTX_FULLNESS, 0); |
| WRITE_REG(priv, regCTRLST, |
| regCTRLST_BASE | regCTRLST_RX_ENA | regCTRLST_TX_ENA); |
| |
| WRITE_REG(priv, regVGLB, 0); |
| WRITE_REG(priv, regMAX_FRAME_A, |
| priv->rxf_fifo0.m.pktsz & MAX_FRAME_AB_VAL); |
| |
| DBG("RDINTCM=%08x\n", priv->rdintcm); /*NOTE: test script uses this */ |
| WRITE_REG(priv, regRDINTCM0, priv->rdintcm); |
| WRITE_REG(priv, regRDINTCM2, 0); /*cpu_to_le32(rcm.val)); */ |
| |
| DBG("TDINTCM=%08x\n", priv->tdintcm); /*NOTE: test script uses this */ |
| WRITE_REG(priv, regTDINTCM0, priv->tdintcm); /* old val = 0x300064 */ |
| |
| /* Enable timer interrupt once in 2 secs. */ |
| /*WRITE_REG(priv, regGTMR0, ((GTMR_SEC * 2) & GTMR_DATA)); */ |
| bdx_restore_mac(priv->ndev, priv); |
| |
| WRITE_REG(priv, regGMAC_RXF_A, GMAC_RX_FILTER_OSEN | |
| GMAC_RX_FILTER_AM | GMAC_RX_FILTER_AB); |
| |
| #define BDX_IRQ_TYPE ((priv->nic->irq_type == IRQ_MSI) ? 0 : IRQF_SHARED) |
| |
| rc = request_irq(priv->pdev->irq, bdx_isr_napi, BDX_IRQ_TYPE, |
| ndev->name, ndev); |
| if (rc) |
| goto err_irq; |
| bdx_enable_interrupts(priv); |
| |
| RET(0); |
| |
| err_irq: |
| RET(rc); |
| } |
| |
| static void bdx_hw_stop(struct bdx_priv *priv) |
| { |
| ENTER; |
| bdx_disable_interrupts(priv); |
| free_irq(priv->pdev->irq, priv->ndev); |
| |
| netif_carrier_off(priv->ndev); |
| netif_stop_queue(priv->ndev); |
| |
| RET(); |
| } |
| |
| static int bdx_hw_reset_direct(void __iomem *regs) |
| { |
| u32 val, i; |
| ENTER; |
| |
| /* reset sequences: read, write 1, read, write 0 */ |
| val = readl(regs + regCLKPLL); |
| writel((val | CLKPLL_SFTRST) + 0x8, regs + regCLKPLL); |
| udelay(50); |
| val = readl(regs + regCLKPLL); |
| writel(val & ~CLKPLL_SFTRST, regs + regCLKPLL); |
| |
| /* check that the PLLs are locked and reset ended */ |
| for (i = 0; i < 70; i++, mdelay(10)) |
| if ((readl(regs + regCLKPLL) & CLKPLL_LKD) == CLKPLL_LKD) { |
| /* do any PCI-E read transaction */ |
| readl(regs + regRXD_CFG0_0); |
| return 0; |
| } |
| pr_err("HW reset failed\n"); |
| return 1; /* failure */ |
| } |
| |
| static int bdx_hw_reset(struct bdx_priv *priv) |
| { |
| u32 val, i; |
| ENTER; |
| |
| if (priv->port == 0) { |
| /* reset sequences: read, write 1, read, write 0 */ |
| val = READ_REG(priv, regCLKPLL); |
| WRITE_REG(priv, regCLKPLL, (val | CLKPLL_SFTRST) + 0x8); |
| udelay(50); |
| val = READ_REG(priv, regCLKPLL); |
| WRITE_REG(priv, regCLKPLL, val & ~CLKPLL_SFTRST); |
| } |
| /* check that the PLLs are locked and reset ended */ |
| for (i = 0; i < 70; i++, mdelay(10)) |
| if ((READ_REG(priv, regCLKPLL) & CLKPLL_LKD) == CLKPLL_LKD) { |
| /* do any PCI-E read transaction */ |
| READ_REG(priv, regRXD_CFG0_0); |
| return 0; |
| } |
| pr_err("HW reset failed\n"); |
| return 1; /* failure */ |
| } |
| |
| static int bdx_sw_reset(struct bdx_priv *priv) |
| { |
| int i; |
| |
| ENTER; |
| /* 1. load MAC (obsolete) */ |
| /* 2. disable Rx (and Tx) */ |
| WRITE_REG(priv, regGMAC_RXF_A, 0); |
| mdelay(100); |
| /* 3. disable port */ |
| WRITE_REG(priv, regDIS_PORT, 1); |
| /* 4. disable queue */ |
| WRITE_REG(priv, regDIS_QU, 1); |
| /* 5. wait until hw is disabled */ |
| for (i = 0; i < 50; i++) { |
| if (READ_REG(priv, regRST_PORT) & 1) |
| break; |
| mdelay(10); |
| } |
| if (i == 50) |
| netdev_err(priv->ndev, "SW reset timeout. continuing anyway\n"); |
| |
| /* 6. disable intrs */ |
| WRITE_REG(priv, regRDINTCM0, 0); |
| WRITE_REG(priv, regTDINTCM0, 0); |
| WRITE_REG(priv, regIMR, 0); |
| READ_REG(priv, regISR); |
| |
| /* 7. reset queue */ |
| WRITE_REG(priv, regRST_QU, 1); |
| /* 8. reset port */ |
| WRITE_REG(priv, regRST_PORT, 1); |
| /* 9. zero all read and write pointers */ |
| for (i = regTXD_WPTR_0; i <= regTXF_RPTR_3; i += 0x10) |
| DBG("%x = %x\n", i, READ_REG(priv, i) & TXF_WPTR_WR_PTR); |
| for (i = regTXD_WPTR_0; i <= regTXF_RPTR_3; i += 0x10) |
| WRITE_REG(priv, i, 0); |
| /* 10. unseet port disable */ |
| WRITE_REG(priv, regDIS_PORT, 0); |
| /* 11. unset queue disable */ |
| WRITE_REG(priv, regDIS_QU, 0); |
| /* 12. unset queue reset */ |
| WRITE_REG(priv, regRST_QU, 0); |
| /* 13. unset port reset */ |
| WRITE_REG(priv, regRST_PORT, 0); |
| /* 14. enable Rx */ |
| /* skiped. will be done later */ |
| /* 15. save MAC (obsolete) */ |
| for (i = regTXD_WPTR_0; i <= regTXF_RPTR_3; i += 0x10) |
| DBG("%x = %x\n", i, READ_REG(priv, i) & TXF_WPTR_WR_PTR); |
| |
| RET(0); |
| } |
| |
| /* bdx_reset - performs right type of reset depending on hw type */ |
| static int bdx_reset(struct bdx_priv *priv) |
| { |
| ENTER; |
| RET((priv->pdev->device == 0x3009) |
| ? bdx_hw_reset(priv) |
| : bdx_sw_reset(priv)); |
| } |
| |
| /** |
| * bdx_close - Disables a network interface |
| * @netdev: network interface device structure |
| * |
| * Returns 0, this is not allowed to fail |
| * |
| * The close entry point is called when an interface is de-activated |
| * by the OS. The hardware is still under the drivers control, but |
| * needs to be disabled. A global MAC reset is issued to stop the |
| * hardware, and all transmit and receive resources are freed. |
| **/ |
| static int bdx_close(struct net_device *ndev) |
| { |
| struct bdx_priv *priv = NULL; |
| |
| ENTER; |
| priv = netdev_priv(ndev); |
| |
| napi_disable(&priv->napi); |
| |
| bdx_reset(priv); |
| bdx_hw_stop(priv); |
| bdx_rx_free(priv); |
| bdx_tx_free(priv); |
| RET(0); |
| } |
| |
| /** |
| * bdx_open - Called when a network interface is made active |
| * @netdev: network interface device structure |
| * |
| * Returns 0 on success, negative value on failure |
| * |
| * The open entry point is called when a network interface is made |
| * active by the system (IFF_UP). At this point all resources needed |
| * for transmit and receive operations are allocated, the interrupt |
| * handler is registered with the OS, the watchdog timer is started, |
| * and the stack is notified that the interface is ready. |
| **/ |
| static int bdx_open(struct net_device *ndev) |
| { |
| struct bdx_priv *priv; |
| int rc; |
| |
| ENTER; |
| priv = netdev_priv(ndev); |
| bdx_reset(priv); |
| if (netif_running(ndev)) |
| netif_stop_queue(priv->ndev); |
| |
| if ((rc = bdx_tx_init(priv)) || |
| (rc = bdx_rx_init(priv)) || |
| (rc = bdx_fw_load(priv))) |
| goto err; |
| |
| bdx_rx_alloc_skbs(priv, &priv->rxf_fifo0); |
| |
| rc = bdx_hw_start(priv); |
| if (rc) |
| goto err; |
| |
| napi_enable(&priv->napi); |
| |
| print_fw_id(priv->nic); |
| |
| RET(0); |
| |
| err: |
| bdx_close(ndev); |
| RET(rc); |
| } |
| |
| static int bdx_range_check(struct bdx_priv *priv, u32 offset) |
| { |
| return (offset > (u32) (BDX_REGS_SIZE / priv->nic->port_num)) ? |
| -EINVAL : 0; |
| } |
| |
| static int bdx_ioctl_priv(struct net_device *ndev, struct ifreq *ifr, int cmd) |
| { |
| struct bdx_priv *priv = netdev_priv(ndev); |
| u32 data[3]; |
| int error; |
| |
| ENTER; |
| |
| DBG("jiffies=%ld cmd=%d\n", jiffies, cmd); |
| if (cmd != SIOCDEVPRIVATE) { |
| error = copy_from_user(data, ifr->ifr_data, sizeof(data)); |
| if (error) { |
| pr_err("can't copy from user\n"); |
| RET(-EFAULT); |
| } |
| DBG("%d 0x%x 0x%x\n", data[0], data[1], data[2]); |
| } |
| |
| if (!capable(CAP_SYS_RAWIO)) |
| return -EPERM; |
| |
| switch (data[0]) { |
| |
| case BDX_OP_READ: |
| error = bdx_range_check(priv, data[1]); |
| if (error < 0) |
| return error; |
| data[2] = READ_REG(priv, data[1]); |
| DBG("read_reg(0x%x)=0x%x (dec %d)\n", data[1], data[2], |
| data[2]); |
| error = copy_to_user(ifr->ifr_data, data, sizeof(data)); |
| if (error) |
| RET(-EFAULT); |
| break; |
| |
| case BDX_OP_WRITE: |
| error = bdx_range_check(priv, data[1]); |
| if (error < 0) |
| return error; |
| WRITE_REG(priv, data[1], data[2]); |
| DBG("write_reg(0x%x, 0x%x)\n", data[1], data[2]); |
| break; |
| |
| default: |
| RET(-EOPNOTSUPP); |
| } |
| return 0; |
| } |
| |
| static int bdx_ioctl(struct net_device *ndev, struct ifreq *ifr, int cmd) |
| { |
| ENTER; |
| if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
| RET(bdx_ioctl_priv(ndev, ifr, cmd)); |
| else |
| RET(-EOPNOTSUPP); |
| } |
| |
| /** |
| * __bdx_vlan_rx_vid - private helper for adding/killing VLAN vid |
| * @ndev: network device |
| * @vid: VLAN vid |
| * @op: add or kill operation |
| * |
| * Passes VLAN filter table to hardware |
| */ |
| static void __bdx_vlan_rx_vid(struct net_device *ndev, uint16_t vid, int enable) |
| { |
| struct bdx_priv *priv = netdev_priv(ndev); |
| u32 reg, bit, val; |
| |
| ENTER; |
| DBG2("vid=%d value=%d\n", (int)vid, enable); |
| if (unlikely(vid >= 4096)) { |
| pr_err("invalid VID: %u (> 4096)\n", vid); |
| RET(); |
| } |
| reg = regVLAN_0 + (vid / 32) * 4; |
| bit = 1 << vid % 32; |
| val = READ_REG(priv, reg); |
| DBG2("reg=%x, val=%x, bit=%d\n", reg, val, bit); |
| if (enable) |
| val |= bit; |
| else |
| val &= ~bit; |
| DBG2("new val %x\n", val); |
| WRITE_REG(priv, reg, val); |
| RET(); |
| } |
| |
| /** |
| * bdx_vlan_rx_add_vid - kernel hook for adding VLAN vid to hw filtering table |
| * @ndev: network device |
| * @vid: VLAN vid to add |
| */ |
| static int bdx_vlan_rx_add_vid(struct net_device *ndev, __be16 proto, u16 vid) |
| { |
| __bdx_vlan_rx_vid(ndev, vid, 1); |
| return 0; |
| } |
| |
| /** |
| * bdx_vlan_rx_kill_vid - kernel hook for killing VLAN vid in hw filtering table |
| * @ndev: network device |
| * @vid: VLAN vid to kill |
| */ |
| static int bdx_vlan_rx_kill_vid(struct net_device *ndev, __be16 proto, u16 vid) |
| { |
| __bdx_vlan_rx_vid(ndev, vid, 0); |
| return 0; |
| } |
| |
| /** |
| * bdx_change_mtu - Change the Maximum Transfer Unit |
| * @netdev: network interface device structure |
| * @new_mtu: new value for maximum frame size |
| * |
| * Returns 0 on success, negative on failure |
| */ |
| static int bdx_change_mtu(struct net_device *ndev, int new_mtu) |
| { |
| ENTER; |
| |
| if (new_mtu == ndev->mtu) |
| RET(0); |
| |
| /* enforce minimum frame size */ |
| if (new_mtu < ETH_ZLEN) { |
| netdev_err(ndev, "mtu %d is less then minimal %d\n", |
| new_mtu, ETH_ZLEN); |
| RET(-EINVAL); |
| } |
| |
| ndev->mtu = new_mtu; |
| if (netif_running(ndev)) { |
| bdx_close(ndev); |
| bdx_open(ndev); |
| } |
| RET(0); |
| } |
| |
| static void bdx_setmulti(struct net_device *ndev) |
| { |
| struct bdx_priv *priv = netdev_priv(ndev); |
| |
| u32 rxf_val = |
| GMAC_RX_FILTER_AM | GMAC_RX_FILTER_AB | GMAC_RX_FILTER_OSEN; |
| int i; |
| |
| ENTER; |
| /* IMF - imperfect (hash) rx multicat filter */ |
| /* PMF - perfect rx multicat filter */ |
| |
| /* FIXME: RXE(OFF) */ |
| if (ndev->flags & IFF_PROMISC) { |
| rxf_val |= GMAC_RX_FILTER_PRM; |
| } else if (ndev->flags & IFF_ALLMULTI) { |
| /* set IMF to accept all multicast frmaes */ |
| for (i = 0; i < MAC_MCST_HASH_NUM; i++) |
| WRITE_REG(priv, regRX_MCST_HASH0 + i * 4, ~0); |
| } else if (!netdev_mc_empty(ndev)) { |
| u8 hash; |
| struct netdev_hw_addr *ha; |
| u32 reg, val; |
| |
| /* set IMF to deny all multicast frames */ |
| for (i = 0; i < MAC_MCST_HASH_NUM; i++) |
| WRITE_REG(priv, regRX_MCST_HASH0 + i * 4, 0); |
| /* set PMF to deny all multicast frames */ |
| for (i = 0; i < MAC_MCST_NUM; i++) { |
| WRITE_REG(priv, regRX_MAC_MCST0 + i * 8, 0); |
| WRITE_REG(priv, regRX_MAC_MCST1 + i * 8, 0); |
| } |
| |
| /* use PMF to accept first MAC_MCST_NUM (15) addresses */ |
| /* TBD: sort addresses and write them in ascending order |
| * into RX_MAC_MCST regs. we skip this phase now and accept ALL |
| * multicast frames throu IMF */ |
| /* accept the rest of addresses throu IMF */ |
| netdev_for_each_mc_addr(ha, ndev) { |
| hash = 0; |
| for (i = 0; i < ETH_ALEN; i++) |
| hash ^= ha->addr[i]; |
| reg = regRX_MCST_HASH0 + ((hash >> 5) << 2); |
| val = READ_REG(priv, reg); |
| val |= (1 << (hash % 32)); |
| WRITE_REG(priv, reg, val); |
| } |
| |
| } else { |
| DBG("only own mac %d\n", netdev_mc_count(ndev)); |
| rxf_val |= GMAC_RX_FILTER_AB; |
| } |
| WRITE_REG(priv, regGMAC_RXF_A, rxf_val); |
| /* enable RX */ |
| /* FIXME: RXE(ON) */ |
| RET(); |
| } |
| |
| static int bdx_set_mac(struct net_device *ndev, void *p) |
| { |
| struct bdx_priv *priv = netdev_priv(ndev); |
| struct sockaddr *addr = p; |
| |
| ENTER; |
| /* |
| if (netif_running(dev)) |
| return -EBUSY |
| */ |
| memcpy(ndev->dev_addr, addr->sa_data, ndev->addr_len); |
| bdx_restore_mac(ndev, priv); |
| RET(0); |
| } |
| |
| static int bdx_read_mac(struct bdx_priv *priv) |
| { |
| u16 macAddress[3], i; |
| ENTER; |
| |
| macAddress[2] = READ_REG(priv, regUNC_MAC0_A); |
| macAddress[2] = READ_REG(priv, regUNC_MAC0_A); |
| macAddress[1] = READ_REG(priv, regUNC_MAC1_A); |
| macAddress[1] = READ_REG(priv, regUNC_MAC1_A); |
| macAddress[0] = READ_REG(priv, regUNC_MAC2_A); |
| macAddress[0] = READ_REG(priv, regUNC_MAC2_A); |
| for (i = 0; i < 3; i++) { |
| priv->ndev->dev_addr[i * 2 + 1] = macAddress[i]; |
| priv->ndev->dev_addr[i * 2] = macAddress[i] >> 8; |
| } |
| RET(0); |
| } |
| |
| static u64 bdx_read_l2stat(struct bdx_priv *priv, int reg) |
| { |
| u64 val; |
| |
| val = READ_REG(priv, reg); |
| val |= ((u64) READ_REG(priv, reg + 8)) << 32; |
| return val; |
| } |
| |
| /*Do the statistics-update work*/ |
| static void bdx_update_stats(struct bdx_priv *priv) |
| { |
| struct bdx_stats *stats = &priv->hw_stats; |
| u64 *stats_vector = (u64 *) stats; |
| int i; |
| int addr; |
| |
| /*Fill HW structure */ |
| addr = 0x7200; |
| /*First 12 statistics - 0x7200 - 0x72B0 */ |
| for (i = 0; i < 12; i++) { |
| stats_vector[i] = bdx_read_l2stat(priv, addr); |
| addr += 0x10; |
| } |
| BDX_ASSERT(addr != 0x72C0); |
| /* 0x72C0-0x72E0 RSRV */ |
| addr = 0x72F0; |
| for (; i < 16; i++) { |
| stats_vector[i] = bdx_read_l2stat(priv, addr); |
| addr += 0x10; |
| } |
| BDX_ASSERT(addr != 0x7330); |
| /* 0x7330-0x7360 RSRV */ |
| addr = 0x7370; |
| for (; i < 19; i++) { |
| stats_vector[i] = bdx_read_l2stat(priv, addr); |
| addr += 0x10; |
| } |
| BDX_ASSERT(addr != 0x73A0); |
| /* 0x73A0-0x73B0 RSRV */ |
| addr = 0x73C0; |
| for (; i < 23; i++) { |
| stats_vector[i] = bdx_read_l2stat(priv, addr); |
| addr += 0x10; |
| } |
| BDX_ASSERT(addr != 0x7400); |
| BDX_ASSERT((sizeof(struct bdx_stats) / sizeof(u64)) != i); |
| } |
| |
| static void print_rxdd(struct rxd_desc *rxdd, u32 rxd_val1, u16 len, |
| u16 rxd_vlan); |
| static void print_rxfd(struct rxf_desc *rxfd); |
| |
| /************************************************************************* |
| * Rx DB * |
| *************************************************************************/ |
| |
| static void bdx_rxdb_destroy(struct rxdb *db) |
| { |
| vfree(db); |
| } |
| |
| static struct rxdb *bdx_rxdb_create(int nelem) |
| { |
| struct rxdb *db; |
| int i; |
| |
| db = vmalloc(sizeof(struct rxdb) |
| + (nelem * sizeof(int)) |
| + (nelem * sizeof(struct rx_map))); |
| if (likely(db != NULL)) { |
| db->stack = (int *)(db + 1); |
| db->elems = (void *)(db->stack + nelem); |
| db->nelem = nelem; |
| db->top = nelem; |
| for (i = 0; i < nelem; i++) |
| db->stack[i] = nelem - i - 1; /* to make first allocs |
| close to db struct*/ |
| } |
| |
| return db; |
| } |
| |
| static inline int bdx_rxdb_alloc_elem(struct rxdb *db) |
| { |
| BDX_ASSERT(db->top <= 0); |
| return db->stack[--(db->top)]; |
| } |
| |
| static inline void *bdx_rxdb_addr_elem(struct rxdb *db, int n) |
| { |
| BDX_ASSERT((n < 0) || (n >= db->nelem)); |
| return db->elems + n; |
| } |
| |
| static inline int bdx_rxdb_available(struct rxdb *db) |
| { |
| return db->top; |
| } |
| |
| static inline void bdx_rxdb_free_elem(struct rxdb *db, int n) |
| { |
| BDX_ASSERT((n >= db->nelem) || (n < 0)); |
| db->stack[(db->top)++] = n; |
| } |
| |
| /************************************************************************* |
| * Rx Init * |
| *************************************************************************/ |
| |
| /** |
| * bdx_rx_init - initialize RX all related HW and SW resources |
| * @priv: NIC private structure |
| * |
| * Returns 0 on success, negative value on failure |
| * |
| * It creates rxf and rxd fifos, update relevant HW registers, preallocate |
| * skb for rx. It assumes that Rx is desabled in HW |
| * funcs are grouped for better cache usage |
| * |
| * RxD fifo is smaller than RxF fifo by design. Upon high load, RxD will be |
| * filled and packets will be dropped by nic without getting into host or |
| * cousing interrupt. Anyway, in that condition, host has no chance to process |
| * all packets, but dropping in nic is cheaper, since it takes 0 cpu cycles |
| */ |
| |
| /* TBD: ensure proper packet size */ |
| |
| static int bdx_rx_init(struct bdx_priv *priv) |
| { |
| ENTER; |
| |
| if (bdx_fifo_init(priv, &priv->rxd_fifo0.m, priv->rxd_size, |
| regRXD_CFG0_0, regRXD_CFG1_0, |
| regRXD_RPTR_0, regRXD_WPTR_0)) |
| goto err_mem; |
| if (bdx_fifo_init(priv, &priv->rxf_fifo0.m, priv->rxf_size, |
| regRXF_CFG0_0, regRXF_CFG1_0, |
| regRXF_RPTR_0, regRXF_WPTR_0)) |
| goto err_mem; |
| priv->rxdb = bdx_rxdb_create(priv->rxf_fifo0.m.memsz / |
| sizeof(struct rxf_desc)); |
| if (!priv->rxdb) |
| goto err_mem; |
| |
| priv->rxf_fifo0.m.pktsz = priv->ndev->mtu + VLAN_ETH_HLEN; |
| return 0; |
| |
| err_mem: |
| netdev_err(priv->ndev, "Rx init failed\n"); |
| return -ENOMEM; |
| } |
| |
| /** |
| * bdx_rx_free_skbs - frees and unmaps all skbs allocated for the fifo |
| * @priv: NIC private structure |
| * @f: RXF fifo |
| */ |
| static void bdx_rx_free_skbs(struct bdx_priv *priv, struct rxf_fifo *f) |
| { |
| struct rx_map *dm; |
| struct rxdb *db = priv->rxdb; |
| u16 i; |
| |
| ENTER; |
| DBG("total=%d free=%d busy=%d\n", db->nelem, bdx_rxdb_available(db), |
| db->nelem - bdx_rxdb_available(db)); |
| while (bdx_rxdb_available(db) > 0) { |
| i = bdx_rxdb_alloc_elem(db); |
| dm = bdx_rxdb_addr_elem(db, i); |
| dm->dma = 0; |
| } |
| for (i = 0; i < db->nelem; i++) { |
| dm = bdx_rxdb_addr_elem(db, i); |
| if (dm->dma) { |
| pci_unmap_single(priv->pdev, |
| dm->dma, f->m.pktsz, |
| PCI_DMA_FROMDEVICE); |
| dev_kfree_skb(dm->skb); |
| } |
| } |
| } |
| |
| /** |
| * bdx_rx_free - release all Rx resources |
| * @priv: NIC private structure |
| * |
| * It assumes that Rx is desabled in HW |
| */ |
| static void bdx_rx_free(struct bdx_priv *priv) |
| { |
| ENTER; |
| if (priv->rxdb) { |
| bdx_rx_free_skbs(priv, &priv->rxf_fifo0); |
| bdx_rxdb_destroy(priv->rxdb); |
| priv->rxdb = NULL; |
| } |
| bdx_fifo_free(priv, &priv->rxf_fifo0.m); |
| bdx_fifo_free(priv, &priv->rxd_fifo0.m); |
| |
| RET(); |
| } |
| |
| /************************************************************************* |
| * Rx Engine * |
| *************************************************************************/ |
| |
| /** |
| * bdx_rx_alloc_skbs - fill rxf fifo with new skbs |
| * @priv: nic's private structure |
| * @f: RXF fifo that needs skbs |
| * |
| * It allocates skbs, build rxf descs and push it (rxf descr) into rxf fifo. |
| * skb's virtual and physical addresses are stored in skb db. |
| * To calculate free space, func uses cached values of RPTR and WPTR |
| * When needed, it also updates RPTR and WPTR. |
| */ |
| |
| /* TBD: do not update WPTR if no desc were written */ |
| |
| static void bdx_rx_alloc_skbs(struct bdx_priv *priv, struct rxf_fifo *f) |
| { |
| struct sk_buff *skb; |
| struct rxf_desc *rxfd; |
| struct rx_map *dm; |
| int dno, delta, idx; |
| struct rxdb *db = priv->rxdb; |
| |
| ENTER; |
| dno = bdx_rxdb_available(db) - 1; |
| while (dno > 0) { |
| skb = netdev_alloc_skb(priv->ndev, f->m.pktsz + NET_IP_ALIGN); |
| if (!skb) |
| break; |
| |
| skb_reserve(skb, NET_IP_ALIGN); |
| |
| idx = bdx_rxdb_alloc_elem(db); |
| dm = bdx_rxdb_addr_elem(db, idx); |
| dm->dma = pci_map_single(priv->pdev, |
| skb->data, f->m.pktsz, |
| PCI_DMA_FROMDEVICE); |
| dm->skb = skb; |
| rxfd = (struct rxf_desc *)(f->m.va + f->m.wptr); |
| rxfd->info = CPU_CHIP_SWAP32(0x10003); /* INFO=1 BC=3 */ |
| rxfd->va_lo = idx; |
| rxfd->pa_lo = CPU_CHIP_SWAP32(L32_64(dm->dma)); |
| rxfd->pa_hi = CPU_CHIP_SWAP32(H32_64(dm->dma)); |
| rxfd->len = CPU_CHIP_SWAP32(f->m.pktsz); |
| print_rxfd(rxfd); |
| |
| f->m.wptr += sizeof(struct rxf_desc); |
| delta = f->m.wptr - f->m.memsz; |
| if (unlikely(delta >= 0)) { |
| f->m.wptr = delta; |
| if (delta > 0) { |
| memcpy(f->m.va, f->m.va + f->m.memsz, delta); |
| DBG("wrapped descriptor\n"); |
| } |
| } |
| dno--; |
| } |
| /*TBD: to do - delayed rxf wptr like in txd */ |
| WRITE_REG(priv, f->m.reg_WPTR, f->m.wptr & TXF_WPTR_WR_PTR); |
| RET(); |
| } |
| |
| static inline void |
| NETIF_RX_MUX(struct bdx_priv *priv, u32 rxd_val1, u16 rxd_vlan, |
| struct sk_buff *skb) |
| { |
| ENTER; |
| DBG("rxdd->flags.bits.vtag=%d\n", GET_RXD_VTAG(rxd_val1)); |
| if (GET_RXD_VTAG(rxd_val1)) { |
| DBG("%s: vlan rcv vlan '%x' vtag '%x'\n", |
| priv->ndev->name, |
| GET_RXD_VLAN_ID(rxd_vlan), |
| GET_RXD_VTAG(rxd_val1)); |
| __vlan_hwaccel_put_tag(skb, GET_RXD_VLAN_TCI(rxd_vlan)); |
| } |
| netif_receive_skb(skb); |
| } |
| |
| static void bdx_recycle_skb(struct bdx_priv *priv, struct rxd_desc *rxdd) |
| { |
| struct rxf_desc *rxfd; |
| struct rx_map *dm; |
| struct rxf_fifo *f; |
| struct rxdb *db; |
| struct sk_buff *skb; |
| int delta; |
| |
| ENTER; |
| DBG("priv=%p rxdd=%p\n", priv, rxdd); |
| f = &priv->rxf_fifo0; |
| db = priv->rxdb; |
| DBG("db=%p f=%p\n", db, f); |
| dm = bdx_rxdb_addr_elem(db, rxdd->va_lo); |
| DBG("dm=%p\n", dm); |
| skb = dm->skb; |
| rxfd = (struct rxf_desc *)(f->m.va + f->m.wptr); |
| rxfd->info = CPU_CHIP_SWAP32(0x10003); /* INFO=1 BC=3 */ |
| rxfd->va_lo = rxdd->va_lo; |
| rxfd->pa_lo = CPU_CHIP_SWAP32(L32_64(dm->dma)); |
| rxfd->pa_hi = CPU_CHIP_SWAP32(H32_64(dm->dma)); |
| rxfd->len = CPU_CHIP_SWAP32(f->m.pktsz); |
| print_rxfd(rxfd); |
| |
| f->m.wptr += sizeof(struct rxf_desc); |
| delta = f->m.wptr - f->m.memsz; |
| if (unlikely(delta >= 0)) { |
| f->m.wptr = delta; |
| if (delta > 0) { |
| memcpy(f->m.va, f->m.va + f->m.memsz, delta); |
| DBG("wrapped descriptor\n"); |
| } |
| } |
| RET(); |
| } |
| |
| /** |
| * bdx_rx_receive - receives full packets from RXD fifo and pass them to OS |
| * NOTE: a special treatment is given to non-continuous descriptors |
| * that start near the end, wraps around and continue at the beginning. a second |
| * part is copied right after the first, and then descriptor is interpreted as |
| * normal. fifo has an extra space to allow such operations |
| * @priv: nic's private structure |
| * @f: RXF fifo that needs skbs |
| * @budget: maximum number of packets to receive |
| */ |
| |
| /* TBD: replace memcpy func call by explicite inline asm */ |
| |
| static int bdx_rx_receive(struct bdx_priv *priv, struct rxd_fifo *f, int budget) |
| { |
| struct net_device *ndev = priv->ndev; |
| struct sk_buff *skb, *skb2; |
| struct rxd_desc *rxdd; |
| struct rx_map *dm; |
| struct rxf_fifo *rxf_fifo; |
| int tmp_len, size; |
| int done = 0; |
| int max_done = BDX_MAX_RX_DONE; |
| struct rxdb *db = NULL; |
| /* Unmarshalled descriptor - copy of descriptor in host order */ |
| u32 rxd_val1; |
| u16 len; |
| u16 rxd_vlan; |
| |
| ENTER; |
| max_done = budget; |
| |
| f->m.wptr = READ_REG(priv, f->m.reg_WPTR) & TXF_WPTR_WR_PTR; |
| |
| size = f->m.wptr - f->m.rptr; |
| if (size < 0) |
| size = f->m.memsz + size; /* size is negative :-) */ |
| |
| while (size > 0) { |
| |
| rxdd = (struct rxd_desc *)(f->m.va + f->m.rptr); |
| rxd_val1 = CPU_CHIP_SWAP32(rxdd->rxd_val1); |
| |
| len = CPU_CHIP_SWAP16(rxdd->len); |
| |
| rxd_vlan = CPU_CHIP_SWAP16(rxdd->rxd_vlan); |
| |
| print_rxdd(rxdd, rxd_val1, len, rxd_vlan); |
| |
| tmp_len = GET_RXD_BC(rxd_val1) << 3; |
| BDX_ASSERT(tmp_len <= 0); |
| size -= tmp_len; |
| if (size < 0) /* test for partially arrived descriptor */ |
| break; |
| |
| f->m.rptr += tmp_len; |
| |
| tmp_len = f->m.rptr - f->m.memsz; |
| if (unlikely(tmp_len >= 0)) { |
| f->m.rptr = tmp_len; |
| if (tmp_len > 0) { |
| DBG("wrapped desc rptr=%d tmp_len=%d\n", |
| f->m.rptr, tmp_len); |
| memcpy(f->m.va + f->m.memsz, f->m.va, tmp_len); |
| } |
| } |
| |
| if (unlikely(GET_RXD_ERR(rxd_val1))) { |
| DBG("rxd_err = 0x%x\n", GET_RXD_ERR(rxd_val1)); |
| ndev->stats.rx_errors++; |
| bdx_recycle_skb(priv, rxdd); |
| continue; |
| } |
| |
| rxf_fifo = &priv->rxf_fifo0; |
| db = priv->rxdb; |
| dm = bdx_rxdb_addr_elem(db, rxdd->va_lo); |
| skb = dm->skb; |
| |
| if (len < BDX_COPYBREAK && |
| (skb2 = netdev_alloc_skb(priv->ndev, len + NET_IP_ALIGN))) { |
| skb_reserve(skb2, NET_IP_ALIGN); |
| /*skb_put(skb2, len); */ |
| pci_dma_sync_single_for_cpu(priv->pdev, |
| dm->dma, rxf_fifo->m.pktsz, |
| PCI_DMA_FROMDEVICE); |
| memcpy(skb2->data, skb->data, len); |
| bdx_recycle_skb(priv, rxdd); |
| skb = skb2; |
| } else { |
| pci_unmap_single(priv->pdev, |
| dm->dma, rxf_fifo->m.pktsz, |
| PCI_DMA_FROMDEVICE); |
| bdx_rxdb_free_elem(db, rxdd->va_lo); |
| } |
| |
| ndev->stats.rx_bytes += len; |
| |
| skb_put(skb, len); |
| skb->protocol = eth_type_trans(skb, ndev); |
| |
| /* Non-IP packets aren't checksum-offloaded */ |
| if (GET_RXD_PKT_ID(rxd_val1) == 0) |
| skb_checksum_none_assert(skb); |
| else |
| skb->ip_summed = CHECKSUM_UNNECESSARY; |
| |
| NETIF_RX_MUX(priv, rxd_val1, rxd_vlan, skb); |
| |
| if (++done >= max_done) |
| break; |
| } |
| |
| ndev->stats.rx_packets += done; |
| |
| /* FIXME: do smth to minimize pci accesses */ |
| WRITE_REG(priv, f->m.reg_RPTR, f->m.rptr & TXF_WPTR_WR_PTR); |
| |
| bdx_rx_alloc_skbs(priv, &priv->rxf_fifo0); |
| |
| RET(done); |
| } |
| |
| /************************************************************************* |
| * Debug / Temprorary Code * |
| *************************************************************************/ |
| static void print_rxdd(struct rxd_desc *rxdd, u32 rxd_val1, u16 len, |
| u16 rxd_vlan) |
| { |
| 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", |
| GET_RXD_BC(rxd_val1), GET_RXD_RXFQ(rxd_val1), GET_RXD_TO(rxd_val1), |
| GET_RXD_TYPE(rxd_val1), GET_RXD_ERR(rxd_val1), |
| GET_RXD_RXP(rxd_val1), GET_RXD_PKT_ID(rxd_val1), |
| GET_RXD_VTAG(rxd_val1), len, GET_RXD_VLAN_ID(rxd_vlan), |
| GET_RXD_CFI(rxd_vlan), GET_RXD_PRIO(rxd_vlan), rxdd->va_lo, |
| rxdd->va_hi); |
| } |
| |
| static void print_rxfd(struct rxf_desc *rxfd) |
| { |
| DBG("=== RxF desc CHIP ORDER/ENDIANNESS =============\n" |
| "info 0x%x va_lo %u pa_lo 0x%x pa_hi 0x%x len 0x%x\n", |
| rxfd->info, rxfd->va_lo, rxfd->pa_lo, rxfd->pa_hi, rxfd->len); |
| } |
| |
| /* |
| * TX HW/SW interaction overview |
| * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| * There are 2 types of TX communication channels between driver and NIC. |
| * 1) TX Free Fifo - TXF - holds ack descriptors for sent packets |
| * 2) TX Data Fifo - TXD - holds descriptors of full buffers. |
| * |
| * Currently NIC supports TSO, checksuming and gather DMA |
| * UFO and IP fragmentation is on the way |
| * |
| * RX SW Data Structures |
| * ~~~~~~~~~~~~~~~~~~~~~ |
| * txdb - used to keep track of all skbs owned by SW and their dma addresses. |
| * For TX case, ownership lasts from geting packet via hard_xmit and until HW |
| * acknowledges sent by TXF descriptors. |
| * Implemented as cyclic buffer. |
| * fifo - keeps info about fifo's size and location, relevant HW registers, |
| * usage and skb db. Each RXD and RXF Fifo has its own fifo structure. |
| * Implemented as simple struct. |
| * |
| * TX SW Execution Flow |
| * ~~~~~~~~~~~~~~~~~~~~ |
| * OS calls driver's hard_xmit method with packet to sent. |
| * Driver creates DMA mappings, builds TXD descriptors and kicks HW |
| * by updating TXD WPTR. |
| * When packet is sent, HW write us TXF descriptor and SW frees original skb. |
| * To prevent TXD fifo overflow without reading HW registers every time, |
| * SW deploys "tx level" technique. |
| * Upon strart up, tx level is initialized to TXD fifo length. |
| * For every sent packet, SW gets its TXD descriptor sizei |
| * (from precalculated array) and substructs it from tx level. |
| * The size is also stored in txdb. When TXF ack arrives, SW fetch size of |
| * original TXD descriptor from txdb and adds it to tx level. |
| * When Tx level drops under some predefined treshhold, the driver |
| * stops the TX queue. When TX level rises above that level, |
| * the tx queue is enabled again. |
| * |
| * This technique avoids eccessive reading of RPTR and WPTR registers. |
| * As our benchmarks shows, it adds 1.5 Gbit/sec to NIS's throuput. |
| */ |
| |
| /************************************************************************* |
| * Tx DB * |
| *************************************************************************/ |
| static inline int bdx_tx_db_size(struct txdb *db) |
| { |
| int taken = db->wptr - db->rptr; |
| if (taken < 0) |
| taken = db->size + 1 + taken; /* (size + 1) equals memsz */ |
| |
| return db->size - taken; |
| } |
| |
| /** |
| * __bdx_tx_db_ptr_next - helper function, increment read/write pointer + wrap |
| * @db: tx data base |
| * @pptr: read or write pointer |
| */ |
| static inline void __bdx_tx_db_ptr_next(struct txdb *db, struct tx_map **pptr) |
| { |
| BDX_ASSERT(db == NULL || pptr == NULL); /* sanity */ |
| |
| BDX_ASSERT(*pptr != db->rptr && /* expect either read */ |
| *pptr != db->wptr); /* or write pointer */ |
| |
| BDX_ASSERT(*pptr < db->start || /* pointer has to be */ |
| *pptr >= db->end); /* in range */ |
| |
| ++*pptr; |
| if (unlikely(*pptr == db->end)) |
| *pptr = db->start; |
| } |
| |
| /** |
| * bdx_tx_db_inc_rptr - increment read pointer |
| * @db: tx data base |
| */ |
| static inline void bdx_tx_db_inc_rptr(struct txdb *db) |
| { |
| BDX_ASSERT(db->rptr == db->wptr); /* can't read from empty db */ |
| __bdx_tx_db_ptr_next(db, &db->rptr); |
| } |
| |
| /** |
| * bdx_tx_db_inc_wptr - increment write pointer |
| * @db: tx data base |
| */ |
| static inline void bdx_tx_db_inc_wptr(struct txdb *db) |
| { |
| __bdx_tx_db_ptr_next(db, &db->wptr); |
| BDX_ASSERT(db->rptr == db->wptr); /* we can not get empty db as |
| a result of write */ |
| } |
| |
| /** |
| * bdx_tx_db_init - creates and initializes tx db |
| * @d: tx data base |
| * @sz_type: size of tx fifo |
| * |
| * Returns 0 on success, error code otherwise |
| */ |
| static int bdx_tx_db_init(struct txdb *d, int sz_type) |
| { |
| int memsz = FIFO_SIZE * (1 << (sz_type + 1)); |
| |
| d->start = vmalloc(memsz); |
| if (!d->start) |
| return -ENOMEM; |
| |
| /* |
| * In order to differentiate between db is empty and db is full |
| * states at least one element should always be empty in order to |
| * avoid rptr == wptr which means db is empty |
| */ |
| d->size = memsz / sizeof(struct tx_map) - 1; |
| d->end = d->start + d->size + 1; /* just after last element */ |
| |
| /* all dbs are created equally empty */ |
| d->rptr = d->start; |
| d->wptr = d->start; |
| |
| return 0; |
| } |
| |
| /** |
| * bdx_tx_db_close - closes tx db and frees all memory |
| * @d: tx data base |
| */ |
| static void bdx_tx_db_close(struct txdb *d) |
| { |
| BDX_ASSERT(d == NULL); |
| |
| vfree(d->start); |
| d->start = NULL; |
| } |
| |
| /************************************************************************* |
| * Tx Engine * |
| *************************************************************************/ |
| |
| /* sizes of tx desc (including padding if needed) as function |
| * of skb's frag number */ |
| static struct { |
| u16 bytes; |
| u16 qwords; /* qword = 64 bit */ |
| } txd_sizes[MAX_SKB_FRAGS + 1]; |
| |
| /** |
| * bdx_tx_map_skb - creates and stores dma mappings for skb's data blocks |
| * @priv: NIC private structure |
| * @skb: socket buffer to map |
| * @txdd: TX descriptor to use |
| * |
| * It makes dma mappings for skb's data blocks and writes them to PBL of |
| * new tx descriptor. It also stores them in the tx db, so they could be |
| * unmaped after data was sent. It is reponsibility of a caller to make |
| * sure that there is enough space in the tx db. Last element holds pointer |
| * to skb itself and marked with zero length |
| */ |
| static inline void |
| bdx_tx_map_skb(struct bdx_priv *priv, struct sk_buff *skb, |
| struct txd_desc *txdd) |
| { |
| struct txdb *db = &priv->txdb; |
| struct pbl *pbl = &txdd->pbl[0]; |
| int nr_frags = skb_shinfo(skb)->nr_frags; |
| int i; |
| |
| db->wptr->len = skb_headlen(skb); |
| db->wptr->addr.dma = pci_map_single(priv->pdev, skb->data, |
| db->wptr->len, PCI_DMA_TODEVICE); |
| pbl->len = CPU_CHIP_SWAP32(db->wptr->len); |
| pbl->pa_lo = CPU_CHIP_SWAP32(L32_64(db->wptr->addr.dma)); |
| pbl->pa_hi = CPU_CHIP_SWAP32(H32_64(db->wptr->addr.dma)); |
| DBG("=== pbl len: 0x%x ================\n", pbl->len); |
| DBG("=== pbl pa_lo: 0x%x ================\n", pbl->pa_lo); |
| DBG("=== pbl pa_hi: 0x%x ================\n", pbl->pa_hi); |
| bdx_tx_db_inc_wptr(db); |
| |
| for (i = 0; i < nr_frags; i++) { |
| const struct skb_frag_struct *frag; |
| |
| frag = &skb_shinfo(skb)->frags[i]; |
| db->wptr->len = skb_frag_size(frag); |
| db->wptr->addr.dma = skb_frag_dma_map(&priv->pdev->dev, frag, |
| 0, skb_frag_size(frag), |
| DMA_TO_DEVICE); |
| |
| pbl++; |
| pbl->len = CPU_CHIP_SWAP32(db->wptr->len); |
| pbl->pa_lo = CPU_CHIP_SWAP32(L32_64(db->wptr->addr.dma)); |
| pbl->pa_hi = CPU_CHIP_SWAP32(H32_64(db->wptr->addr.dma)); |
| bdx_tx_db_inc_wptr(db); |
| } |
| |
| /* add skb clean up info. */ |
| db->wptr->len = -txd_sizes[nr_frags].bytes; |
| db->wptr->addr.skb = skb; |
| bdx_tx_db_inc_wptr(db); |
| } |
| |
| /* init_txd_sizes - precalculate sizes of descriptors for skbs up to 16 frags |
| * number of frags is used as index to fetch correct descriptors size, |
| * instead of calculating it each time */ |
| static void __init init_txd_sizes(void) |
| { |
| int i, lwords; |
| |
| /* 7 - is number of lwords in txd with one phys buffer |
| * 3 - is number of lwords used for every additional phys buffer */ |
| for (i = 0; i < MAX_SKB_FRAGS + 1; i++) { |
| lwords = 7 + (i * 3); |
| if (lwords & 1) |
| lwords++; /* pad it with 1 lword */ |
| txd_sizes[i].qwords = lwords >> 1; |
| txd_sizes[i].bytes = lwords << 2; |
| } |
| } |
| |
| /* bdx_tx_init - initialize all Tx related stuff. |
| * Namely, TXD and TXF fifos, database etc */ |
| static int bdx_tx_init(struct bdx_priv *priv) |
| { |
| if (bdx_fifo_init(priv, &priv->txd_fifo0.m, priv->txd_size, |
| regTXD_CFG0_0, |
| regTXD_CFG1_0, regTXD_RPTR_0, regTXD_WPTR_0)) |
| goto err_mem; |
| if (bdx_fifo_init(priv, &priv->txf_fifo0.m, priv->txf_size, |
| regTXF_CFG0_0, |
| regTXF_CFG1_0, regTXF_RPTR_0, regTXF_WPTR_0)) |
| goto err_mem; |
| |
| /* The TX db has to keep mappings for all packets sent (on TxD) |
| * and not yet reclaimed (on TxF) */ |
| if (bdx_tx_db_init(&priv->txdb, max(priv->txd_size, priv->txf_size))) |
| goto err_mem; |
| |
| priv->tx_level = BDX_MAX_TX_LEVEL; |
| #ifdef BDX_DELAY_WPTR |
| priv->tx_update_mark = priv->tx_level - 1024; |
| #endif |
| return 0; |
| |
| err_mem: |
| netdev_err(priv->ndev, "Tx init failed\n"); |
| return -ENOMEM; |
| } |
| |
| /** |
| * bdx_tx_space - calculates available space in TX fifo |
| * @priv: NIC private structure |
| * |
| * Returns available space in TX fifo in bytes |
| */ |
| static inline int bdx_tx_space(struct bdx_priv *priv) |
| { |
| struct txd_fifo *f = &priv->txd_fifo0; |
| int fsize; |
| |
| f->m.rptr = READ_REG(priv, f->m.reg_RPTR) & TXF_WPTR_WR_PTR; |
| fsize = f->m.rptr - f->m.wptr; |
| if (fsize <= 0) |
| fsize = f->m.memsz + fsize; |
| return fsize; |
| } |
| |
| /** |
| * bdx_tx_transmit - send packet to NIC |
| * @skb: packet to send |
| * @ndev: network device assigned to NIC |
| * Return codes: |
| * o NETDEV_TX_OK everything ok. |
| * o NETDEV_TX_BUSY Cannot transmit packet, try later |
| * Usually a bug, means queue start/stop flow control is broken in |
| * the driver. Note: the driver must NOT put the skb in its DMA ring. |
| * o NETDEV_TX_LOCKED Locking failed, please retry quickly. |
| */ |
| static netdev_tx_t bdx_tx_transmit(struct sk_buff *skb, |
| struct net_device *ndev) |
| { |
| struct bdx_priv *priv = netdev_priv(ndev); |
| struct txd_fifo *f = &priv->txd_fifo0; |
| int txd_checksum = 7; /* full checksum */ |
| int txd_lgsnd = 0; |
| int txd_vlan_id = 0; |
| int txd_vtag = 0; |
| int txd_mss = 0; |
| |
| int nr_frags = skb_shinfo(skb)->nr_frags; |
| struct txd_desc *txdd; |
| int len; |
| unsigned long flags; |
| |
| ENTER; |
| local_irq_save(flags); |
| if (!spin_trylock(&priv->tx_lock)) { |
| local_irq_restore(flags); |
| DBG("%s[%s]: TX locked, returning NETDEV_TX_LOCKED\n", |
| BDX_DRV_NAME, ndev->name); |
| return NETDEV_TX_LOCKED; |
| } |
| |
| /* build tx descriptor */ |
| BDX_ASSERT(f->m.wptr >= f->m.memsz); /* started with valid wptr */ |
| txdd = (struct txd_desc *)(f->m.va + f->m.wptr); |
| if (unlikely(skb->ip_summed != CHECKSUM_PARTIAL)) |
| txd_checksum = 0; |
| |
| if (skb_shinfo(skb)->gso_size) { |
| txd_mss = skb_shinfo(skb)->gso_size; |
| txd_lgsnd = 1; |
| DBG("skb %p skb len %d gso size = %d\n", skb, skb->len, |
| txd_mss); |
| } |
| |
| if (vlan_tx_tag_present(skb)) { |
| /*Cut VLAN ID to 12 bits */ |
| txd_vlan_id = vlan_tx_tag_get(skb) & BITS_MASK(12); |
| txd_vtag = 1; |
| } |
| |
| txdd->length = CPU_CHIP_SWAP16(skb->len); |
| txdd->mss = CPU_CHIP_SWAP16(txd_mss); |
| txdd->txd_val1 = |
| CPU_CHIP_SWAP32(TXD_W1_VAL |
| (txd_sizes[nr_frags].qwords, txd_checksum, txd_vtag, |
| txd_lgsnd, txd_vlan_id)); |
| DBG("=== TxD desc =====================\n"); |
| DBG("=== w1: 0x%x ================\n", txdd->txd_val1); |
| DBG("=== w2: mss 0x%x len 0x%x\n", txdd->mss, txdd->length); |
| |
| bdx_tx_map_skb(priv, skb, txdd); |
| |
| /* increment TXD write pointer. In case of |
| fifo wrapping copy reminder of the descriptor |
| to the beginning */ |
| f->m.wptr += txd_sizes[nr_frags].bytes; |
| len = f->m.wptr - f->m.memsz; |
| if (unlikely(len >= 0)) { |
| f->m.wptr = len; |
| if (len > 0) { |
| BDX_ASSERT(len > f->m.memsz); |
| memcpy(f->m.va, f->m.va + f->m.memsz, len); |
| } |
| } |
| BDX_ASSERT(f->m.wptr >= f->m.memsz); /* finished with valid wptr */ |
| |
| priv->tx_level -= txd_sizes[nr_frags].bytes; |
| BDX_ASSERT(priv->tx_level <= 0 || priv->tx_level > BDX_MAX_TX_LEVEL); |
| #ifdef BDX_DELAY_WPTR |
| if (priv->tx_level > priv->tx_update_mark) { |
| /* Force memory writes to complete before letting h/w |
| know there are new descriptors to fetch. |
| (might be needed on platforms like IA64) |
| wmb(); */ |
| WRITE_REG(priv, f->m.reg_WPTR, f->m.wptr & TXF_WPTR_WR_PTR); |
| } else { |
| if (priv->tx_noupd++ > BDX_NO_UPD_PACKETS) { |
| priv->tx_noupd = 0; |
| WRITE_REG(priv, f->m.reg_WPTR, |
| f->m.wptr & TXF_WPTR_WR_PTR); |
| } |
| } |
| #else |
| /* Force memory writes to complete before letting h/w |
| know there are new descriptors to fetch. |
| (might be needed on platforms like IA64) |
| wmb(); */ |
| WRITE_REG(priv, f->m.reg_WPTR, f->m.wptr & TXF_WPTR_WR_PTR); |
| |
| #endif |
| #ifdef BDX_LLTX |
| ndev->trans_start = jiffies; /* NETIF_F_LLTX driver :( */ |
| #endif |
| ndev->stats.tx_packets++; |
| ndev->stats.tx_bytes += skb->len; |
| |
| if (priv->tx_level < BDX_MIN_TX_LEVEL) { |
| DBG("%s: %s: TX Q STOP level %d\n", |
| BDX_DRV_NAME, ndev->name, priv->tx_level); |
| netif_stop_queue(ndev); |
| } |
| |
| spin_unlock_irqrestore(&priv->tx_lock, flags); |
| return NETDEV_TX_OK; |
| } |
| |
| /** |
| * bdx_tx_cleanup - clean TXF fifo, run in the context of IRQ. |
| * @priv: bdx adapter |
| * |
| * It scans TXF fifo for descriptors, frees DMA mappings and reports to OS |
| * that those packets were sent |
| */ |
| static void bdx_tx_cleanup(struct bdx_priv *priv) |
| { |
| struct txf_fifo *f = &priv->txf_fifo0; |
| struct txdb *db = &priv->txdb; |
| int tx_level = 0; |
| |
| ENTER; |
| f->m.wptr = READ_REG(priv, f->m.reg_WPTR) & TXF_WPTR_MASK; |
| BDX_ASSERT(f->m.rptr >= f->m.memsz); /* started with valid rptr */ |
| |
| while (f->m.wptr != f->m.rptr) { |
| f->m.rptr += BDX_TXF_DESC_SZ; |
| f->m.rptr &= f->m.size_mask; |
| |
| /* unmap all the fragments */ |
| /* first has to come tx_maps containing dma */ |
| BDX_ASSERT(db->rptr->len == 0); |
| do { |
| BDX_ASSERT(db->rptr->addr.dma == 0); |
| pci_unmap_page(priv->pdev, db->rptr->addr.dma, |
| db->rptr->len, PCI_DMA_TODEVICE); |
| bdx_tx_db_inc_rptr(db); |
| } while (db->rptr->len > 0); |
| tx_level -= db->rptr->len; /* '-' koz len is negative */ |
| |
| /* now should come skb pointer - free it */ |
| dev_kfree_skb_irq(db->rptr->addr.skb); |
| bdx_tx_db_inc_rptr(db); |
| } |
| |
| /* let h/w know which TXF descriptors were cleaned */ |
| BDX_ASSERT((f->m.wptr & TXF_WPTR_WR_PTR) >= f->m.memsz); |
| WRITE_REG(priv, f->m.reg_RPTR, f->m.rptr & TXF_WPTR_WR_PTR); |
| |
| /* We reclaimed resources, so in case the Q is stopped by xmit callback, |
| * we resume the transmition and use tx_lock to synchronize with xmit.*/ |
| spin_lock(&priv->tx_lock); |
| priv->tx_level += tx_level; |
| BDX_ASSERT(priv->tx_level <= 0 || priv->tx_level > BDX_MAX_TX_LEVEL); |
| #ifdef BDX_DELAY_WPTR |
| if (priv->tx_noupd) { |
| priv->tx_noupd = 0; |
| WRITE_REG(priv, priv->txd_fifo0.m.reg_WPTR, |
| priv->txd_fifo0.m.wptr & TXF_WPTR_WR_PTR); |
| } |
| #endif |
| |
| if (unlikely(netif_queue_stopped(priv->ndev) && |
| netif_carrier_ok(priv->ndev) && |
| (priv->tx_level >= BDX_MIN_TX_LEVEL))) { |
| DBG("%s: %s: TX Q WAKE level %d\n", |
| BDX_DRV_NAME, priv->ndev->name, priv->tx_level); |
| netif_wake_queue(priv->ndev); |
| } |
| spin_unlock(&priv->tx_lock); |
| } |
| |
| /** |
| * bdx_tx_free_skbs - frees all skbs from TXD fifo. |
| * It gets called when OS stops this dev, eg upon "ifconfig down" or rmmod |
| */ |
| static void bdx_tx_free_skbs(struct bdx_priv *priv) |
| { |
| struct txdb *db = &priv->txdb; |
| |
| ENTER; |
| while (db->rptr != db->wptr) { |
| if (likely(db->rptr->len)) |
| pci_unmap_page(priv->pdev, db->rptr->addr.dma, |
| db->rptr->len, PCI_DMA_TODEVICE); |
| else |
| dev_kfree_skb(db->rptr->addr.skb); |
| bdx_tx_db_inc_rptr(db); |
| } |
| RET(); |
| } |
| |
| /* bdx_tx_free - frees all Tx resources */ |
| static void bdx_tx_free(struct bdx_priv *priv) |
| { |
| ENTER; |
| bdx_tx_free_skbs(priv); |
| bdx_fifo_free(priv, &priv->txd_fifo0.m); |
| bdx_fifo_free(priv, &priv->txf_fifo0.m); |
| bdx_tx_db_close(&priv->txdb); |
| } |
| |
| /** |
| * bdx_tx_push_desc - push descriptor to TxD fifo |
| * @priv: NIC private structure |
| * @data: desc's data |
| * @size: desc's size |
| * |
| * Pushes desc to TxD fifo and overlaps it if needed. |
| * NOTE: this func does not check for available space. this is responsibility |
| * of the caller. Neither does it check that data size is smaller than |
| * fifo size. |
| */ |
| static void bdx_tx_push_desc(struct bdx_priv *priv, void *data, int size) |
| { |
| struct txd_fifo *f = &priv->txd_fifo0; |
| int i = f->m.memsz - f->m.wptr; |
| |
| if (size == 0) |
| return; |
| |
| if (i > size) { |
| memcpy(f->m.va + f->m.wptr, data, size); |
| f->m.wptr += size; |
| } else { |
| memcpy(f->m.va + f->m.wptr, data, i); |
| f->m.wptr = size - i; |
| memcpy(f->m.va, data + i, f->m.wptr); |
| } |
| WRITE_REG(priv, f->m.reg_WPTR, f->m.wptr & TXF_WPTR_WR_PTR); |
| } |
| |
| /** |
| * bdx_tx_push_desc_safe - push descriptor to TxD fifo in a safe way |
| * @priv: NIC private structure |
| * @data: desc's data |
| * @size: desc's size |
| * |
| * NOTE: this func does check for available space and, if necessary, waits for |
| * NIC to read existing data before writing new one. |
| */ |
| static void bdx_tx_push_desc_safe(struct bdx_priv *priv, void *data, int size) |
| { |
| int timer = 0; |
| ENTER; |
| |
| while (size > 0) { |
| /* we substruct 8 because when fifo is full rptr == wptr |
| which also means that fifo is empty, we can understand |
| the difference, but could hw do the same ??? :) */ |
| int avail = bdx_tx_space(priv) - 8; |
| if (avail <= 0) { |
| if (timer++ > 300) { /* prevent endless loop */ |
| DBG("timeout while writing desc to TxD fifo\n"); |
| break; |
| } |
| udelay(50); /* give hw a chance to clean fifo */ |
| continue; |
| } |
| avail = min(avail, size); |
| DBG("about to push %d bytes starting %p size %d\n", avail, |
| data, size); |
| bdx_tx_push_desc(priv, data, avail); |
| size -= avail; |
| data += avail; |
| } |
| RET(); |
| } |
| |
| static const struct net_device_ops bdx_netdev_ops = { |
| .ndo_open = bdx_open, |
| .ndo_stop = bdx_close, |
| .ndo_start_xmit = bdx_tx_transmit, |
| .ndo_validate_addr = eth_validate_addr, |
| .ndo_do_ioctl = bdx_ioctl, |
| .ndo_set_rx_mode = bdx_setmulti, |
| .ndo_change_mtu = bdx_change_mtu, |
| .ndo_set_mac_address = bdx_set_mac, |
| .ndo_vlan_rx_add_vid = bdx_vlan_rx_add_vid, |
| .ndo_vlan_rx_kill_vid = bdx_vlan_rx_kill_vid, |
| }; |
| |
| /** |
| * bdx_probe - Device Initialization Routine |
| * @pdev: PCI device information struct |
| * @ent: entry in bdx_pci_tbl |
| * |
| * Returns 0 on success, negative on failure |
| * |
| * bdx_probe initializes an adapter identified by a pci_dev structure. |
| * The OS initialization, configuring of the adapter private structure, |
| * and a hardware reset occur. |
| * |
| * functions and their order used as explained in |
| * /usr/src/linux/Documentation/DMA-{API,mapping}.txt |
| * |
| */ |
| |
| /* TBD: netif_msg should be checked and implemented. I disable it for now */ |
| static int |
| bdx_probe(struct pci_dev *pdev, const struct pci_device_id *ent) |
| { |
| struct net_device *ndev; |
| struct bdx_priv *priv; |
| int err, pci_using_dac, port; |
| unsigned long pciaddr; |
| u32 regionSize; |
| struct pci_nic *nic; |
| |
| ENTER; |
| |
| nic = vmalloc(sizeof(*nic)); |
| if (!nic) |
| RET(-ENOMEM); |
| |
| /************** pci *****************/ |
| err = pci_enable_device(pdev); |
| if (err) /* it triggers interrupt, dunno why. */ |
| goto err_pci; /* it's not a problem though */ |
| |
| if (!(err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) && |
| !(err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)))) { |
| pci_using_dac = 1; |
| } else { |
| if ((err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) || |
| (err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)))) { |
| pr_err("No usable DMA configuration, aborting\n"); |
| goto err_dma; |
| } |
| pci_using_dac = 0; |
| } |
| |
| err = pci_request_regions(pdev, BDX_DRV_NAME); |
| if (err) |
| goto err_dma; |
| |
| pci_set_master(pdev); |
| |
| pciaddr = pci_resource_start(pdev, 0); |
| if (!pciaddr) { |
| err = -EIO; |
| pr_err("no MMIO resource\n"); |
| goto err_out_res; |
| } |
| regionSize = pci_resource_len(pdev, 0); |
| if (regionSize < BDX_REGS_SIZE) { |
| err = -EIO; |
| pr_err("MMIO resource (%x) too small\n", regionSize); |
| goto err_out_res; |
| } |
| |
| nic->regs = ioremap(pciaddr, regionSize); |
| if (!nic->regs) { |
| err = -EIO; |
| pr_err("ioremap failed\n"); |
| goto err_out_res; |
| } |
| |
| if (pdev->irq < 2) { |
| err = -EIO; |
| pr_err("invalid irq (%d)\n", pdev->irq); |
| goto err_out_iomap; |
| } |
| pci_set_drvdata(pdev, nic); |
| |
| if (pdev->device == 0x3014) |
| nic->port_num = 2; |
| else |
| nic->port_num = 1; |
| |
| print_hw_id(pdev); |
| |
| bdx_hw_reset_direct(nic->regs); |
| |
| nic->irq_type = IRQ_INTX; |
| #ifdef BDX_MSI |
| if ((readl(nic->regs + FPGA_VER) & 0xFFF) >= 378) { |
| err = pci_enable_msi(pdev); |
| if (err) |
| pr_err("Can't eneble msi. error is %d\n", err); |
| else |
| nic->irq_type = IRQ_MSI; |
| } else |
| DBG("HW does not support MSI\n"); |
| #endif |
| |
| /************** netdev **************/ |
| for (port = 0; port < nic->port_num; port++) { |
| ndev = alloc_etherdev(sizeof(struct bdx_priv)); |
| if (!ndev) { |
| err = -ENOMEM; |
| goto err_out_iomap; |
| } |
| |
| ndev->netdev_ops = &bdx_netdev_ops; |
| ndev->tx_queue_len = BDX_NDEV_TXQ_LEN; |
| |
| bdx_set_ethtool_ops(ndev); /* ethtool interface */ |
| |
| /* these fields are used for info purposes only |
| * so we can have them same for all ports of the board */ |
| ndev->if_port = port; |
| ndev->features = NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_TSO |
| | NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX | |
| NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM |
| /*| NETIF_F_FRAGLIST */ |
| ; |
| ndev->hw_features = NETIF_F_IP_CSUM | NETIF_F_SG | |
| NETIF_F_TSO | NETIF_F_HW_VLAN_CTAG_TX; |
| |
| if (pci_using_dac) |
| ndev->features |= NETIF_F_HIGHDMA; |
| |
| /************** priv ****************/ |
| priv = nic->priv[port] = netdev_priv(ndev); |
| |
| priv->pBdxRegs = nic->regs + port * 0x8000; |
| priv->port = port; |
| priv->pdev = pdev; |
| priv->ndev = ndev; |
| priv->nic = nic; |
| priv->msg_enable = BDX_DEF_MSG_ENABLE; |
| |
| netif_napi_add(ndev, &priv->napi, bdx_poll, 64); |
| |
| if ((readl(nic->regs + FPGA_VER) & 0xFFF) == 308) { |
| DBG("HW statistics not supported\n"); |
| priv->stats_flag = 0; |
| } else { |
| priv->stats_flag = 1; |
| } |
| |
| /* Initialize fifo sizes. */ |
| priv->txd_size = 2; |
| priv->txf_size = 2; |
| priv->rxd_size = 2; |
| priv->rxf_size = 3; |
| |
| /* Initialize the initial coalescing registers. */ |
| priv->rdintcm = INT_REG_VAL(0x20, 1, 4, 12); |
| priv->tdintcm = INT_REG_VAL(0x20, 1, 0, 12); |
| |
| /* ndev->xmit_lock spinlock is not used. |
| * Private priv->tx_lock is used for synchronization |
| * between transmit and TX irq cleanup. In addition |
| * set multicast list callback has to use priv->tx_lock. |
| */ |
| #ifdef BDX_LLTX |
| ndev->features |= NETIF_F_LLTX; |
| #endif |
| spin_lock_init(&priv->tx_lock); |
| |
| /*bdx_hw_reset(priv); */ |
| if (bdx_read_mac(priv)) { |
| pr_err("load MAC address failed\n"); |
| goto err_out_iomap; |
| } |
| SET_NETDEV_DEV(ndev, &pdev->dev); |
| err = register_netdev(ndev); |
| if (err) { |
| pr_err("register_netdev failed\n"); |
| goto err_out_free; |
| } |
| netif_carrier_off(ndev); |
| netif_stop_queue(ndev); |
| |
| print_eth_id(ndev); |
| } |
| RET(0); |
| |
| err_out_free: |
| free_netdev(ndev); |
| err_out_iomap: |
| iounmap(nic->regs); |
| err_out_res: |
| pci_release_regions(pdev); |
| err_dma: |
| pci_disable_device(pdev); |
| err_pci: |
| vfree(nic); |
| |
| RET(err); |
| } |
| |
| /****************** Ethtool interface *********************/ |
| /* get strings for statistics counters */ |
| static const char |
| bdx_stat_names[][ETH_GSTRING_LEN] = { |
| "InUCast", /* 0x7200 */ |
| "InMCast", /* 0x7210 */ |
| "InBCast", /* 0x7220 */ |
| "InPkts", /* 0x7230 */ |
| "InErrors", /* 0x7240 */ |
| "InDropped", /* 0x7250 */ |
| "FrameTooLong", /* 0x7260 */ |
| "FrameSequenceErrors", /* 0x7270 */ |
| "InVLAN", /* 0x7280 */ |
| "InDroppedDFE", /* 0x7290 */ |
| "InDroppedIntFull", /* 0x72A0 */ |
| "InFrameAlignErrors", /* 0x72B0 */ |
| |
| /* 0x72C0-0x72E0 RSRV */ |
| |
| "OutUCast", /* 0x72F0 */ |
| "OutMCast", /* 0x7300 */ |
| "OutBCast", /* 0x7310 */ |
| "OutPkts", /* 0x7320 */ |
| |
| /* 0x7330-0x7360 RSRV */ |
| |
| "OutVLAN", /* 0x7370 */ |
| "InUCastOctects", /* 0x7380 */ |
| "OutUCastOctects", /* 0x7390 */ |
| |
| /* 0x73A0-0x73B0 RSRV */ |
| |
| "InBCastOctects", /* 0x73C0 */ |
| "OutBCastOctects", /* 0x73D0 */ |
| "InOctects", /* 0x73E0 */ |
| "OutOctects", /* 0x73F0 */ |
| }; |
| |
| /* |
| * bdx_get_settings - get device-specific settings |
| * @netdev |
| * @ecmd |
| */ |
| static int bdx_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd) |
| { |
| u32 rdintcm; |
| u32 tdintcm; |
| struct bdx_priv *priv = netdev_priv(netdev); |
| |
| rdintcm = priv->rdintcm; |
| tdintcm = priv->tdintcm; |
| |
| ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE); |
| ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE); |
| ethtool_cmd_speed_set(ecmd, SPEED_10000); |
| ecmd->duplex = DUPLEX_FULL; |
| ecmd->port = PORT_FIBRE; |
| ecmd->transceiver = XCVR_EXTERNAL; /* what does it mean? */ |
| ecmd->autoneg = AUTONEG_DISABLE; |
| |
| /* PCK_TH measures in multiples of FIFO bytes |
| We translate to packets */ |
| ecmd->maxtxpkt = |
| ((GET_PCK_TH(tdintcm) * PCK_TH_MULT) / BDX_TXF_DESC_SZ); |
| ecmd->maxrxpkt = |
| ((GET_PCK_TH(rdintcm) * PCK_TH_MULT) / sizeof(struct rxf_desc)); |
| |
| return 0; |
| } |
| |
| /* |
| * bdx_get_drvinfo - report driver information |
| * @netdev |
| * @drvinfo |
| */ |
| static void |
| bdx_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *drvinfo) |
| { |
| struct bdx_priv *priv = netdev_priv(netdev); |
| |
| strlcpy(drvinfo->driver, BDX_DRV_NAME, sizeof(drvinfo->driver)); |
| strlcpy(drvinfo->version, BDX_DRV_VERSION, sizeof(drvinfo->version)); |
| strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); |
| strlcpy(drvinfo->bus_info, pci_name(priv->pdev), |
| sizeof(drvinfo->bus_info)); |
| |
| drvinfo->n_stats = ((priv->stats_flag) ? ARRAY_SIZE(bdx_stat_names) : 0); |
| drvinfo->testinfo_len = 0; |
| drvinfo->regdump_len = 0; |
| drvinfo->eedump_len = 0; |
| } |
| |
| /* |
| * bdx_get_coalesce - get interrupt coalescing parameters |
| * @netdev |
| * @ecoal |
| */ |
| static int |
| bdx_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *ecoal) |
| { |
| u32 rdintcm; |
| u32 tdintcm; |
| struct bdx_priv *priv = netdev_priv(netdev); |
| |
| rdintcm = priv->rdintcm; |
| tdintcm = priv->tdintcm; |
| |
| /* PCK_TH measures in multiples of FIFO bytes |
| We translate to packets */ |
| ecoal->rx_coalesce_usecs = GET_INT_COAL(rdintcm) * INT_COAL_MULT; |
| ecoal->rx_max_coalesced_frames = |
| ((GET_PCK_TH(rdintcm) * PCK_TH_MULT) / sizeof(struct rxf_desc)); |
| |
| ecoal->tx_coalesce_usecs = GET_INT_COAL(tdintcm) * INT_COAL_MULT; |
| ecoal->tx_max_coalesced_frames = |
| ((GET_PCK_TH(tdintcm) * PCK_TH_MULT) / BDX_TXF_DESC_SZ); |
| |
| /* adaptive parameters ignored */ |
| return 0; |
| } |
| |
| /* |
| * bdx_set_coalesce - set interrupt coalescing parameters |
| * @netdev |
| * @ecoal |
| */ |
| static int |
| bdx_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *ecoal) |
| { |
| u32 rdintcm; |
| u32 tdintcm; |
| struct bdx_priv *priv = netdev_priv(netdev); |
| int rx_coal; |
| int tx_coal; |
| int rx_max_coal; |
| int tx_max_coal; |
| |
| /* Check for valid input */ |
| rx_coal = ecoal->rx_coalesce_usecs / INT_COAL_MULT; |
| tx_coal = ecoal->tx_coalesce_usecs / INT_COAL_MULT; |
| rx_max_coal = ecoal->rx_max_coalesced_frames; |
| tx_max_coal = ecoal->tx_max_coalesced_frames; |
| |
| /* Translate from packets to multiples of FIFO bytes */ |
| rx_max_coal = |
| (((rx_max_coal * sizeof(struct rxf_desc)) + PCK_TH_MULT - 1) |
| / PCK_TH_MULT); |
| tx_max_coal = |
| (((tx_max_coal * BDX_TXF_DESC_SZ) + PCK_TH_MULT - 1) |
| / PCK_TH_MULT); |
| |
| if ((rx_coal > 0x7FFF) || (tx_coal > 0x7FFF) || |
| (rx_max_coal > 0xF) || (tx_max_coal > 0xF)) |
| return -EINVAL; |
| |
| rdintcm = INT_REG_VAL(rx_coal, GET_INT_COAL_RC(priv->rdintcm), |
| GET_RXF_TH(priv->rdintcm), rx_max_coal); |
| tdintcm = INT_REG_VAL(tx_coal, GET_INT_COAL_RC(priv->tdintcm), 0, |
| tx_max_coal); |
| |
| priv->rdintcm = rdintcm; |
| priv->tdintcm = tdintcm; |
| |
| WRITE_REG(priv, regRDINTCM0, rdintcm); |
| WRITE_REG(priv, regTDINTCM0, tdintcm); |
| |
| return 0; |
| } |
| |
| /* Convert RX fifo size to number of pending packets */ |
| static inline int bdx_rx_fifo_size_to_packets(int rx_size) |
| { |
| return (FIFO_SIZE * (1 << rx_size)) / sizeof(struct rxf_desc); |
| } |
| |
| /* Convert TX fifo size to number of pending packets */ |
| static inline int bdx_tx_fifo_size_to_packets(int tx_size) |
| { |
| return (FIFO_SIZE * (1 << tx_size)) / BDX_TXF_DESC_SZ; |
| } |
| |
| /* |
| * bdx_get_ringparam - report ring sizes |
| * @netdev |
| * @ring |
| */ |
| static void |
| bdx_get_ringparam(struct net_device *netdev, struct ethtool_ringparam *ring) |
| { |
| struct bdx_priv *priv = netdev_priv(netdev); |
| |
| /*max_pending - the maximum-sized FIFO we allow */ |
| ring->rx_max_pending = bdx_rx_fifo_size_to_packets(3); |
| ring->tx_max_pending = bdx_tx_fifo_size_to_packets(3); |
| ring->rx_pending = bdx_rx_fifo_size_to_packets(priv->rxf_size); |
| ring->tx_pending = bdx_tx_fifo_size_to_packets(priv->txd_size); |
| } |
| |
| /* |
| * bdx_set_ringparam - set ring sizes |
| * @netdev |
| * @ring |
| */ |
| static int |
| bdx_set_ringparam(struct net_device *netdev, struct ethtool_ringparam *ring) |
| { |
| struct bdx_priv *priv = netdev_priv(netdev); |
| int rx_size = 0; |
| int tx_size = 0; |
| |
| for (; rx_size < 4; rx_size++) { |
| if (bdx_rx_fifo_size_to_packets(rx_size) >= ring->rx_pending) |
| break; |
| } |
| if (rx_size == 4) |
| rx_size = 3; |
| |
| for (; tx_size < 4; tx_size++) { |
| if (bdx_tx_fifo_size_to_packets(tx_size) >= ring->tx_pending) |
| break; |
| } |
| if (tx_size == 4) |
| tx_size = 3; |
| |
| /*Is there anything to do? */ |
| if ((rx_size == priv->rxf_size) && |
| (tx_size == priv->txd_size)) |
| return 0; |
| |
| priv->rxf_size = rx_size; |
| if (rx_size > 1) |
| priv->rxd_size = rx_size - 1; |
| else |
| priv->rxd_size = rx_size; |
| |
| priv->txf_size = priv->txd_size = tx_size; |
| |
| if (netif_running(netdev)) { |
| bdx_close(netdev); |
| bdx_open(netdev); |
| } |
| return 0; |
| } |
| |
| /* |
| * bdx_get_strings - return a set of strings that describe the requested objects |
| * @netdev |
| * @data |
| */ |
| static void bdx_get_strings(struct net_device *netdev, u32 stringset, u8 *data) |
| { |
| switch (stringset) { |
| case ETH_SS_STATS: |
| memcpy(data, *bdx_stat_names, sizeof(bdx_stat_names)); |
| break; |
| } |
| } |
| |
| /* |
| * bdx_get_sset_count - return number of statistics or tests |
| * @netdev |
| */ |
| static int bdx_get_sset_count(struct net_device *netdev, int stringset) |
| { |
| struct bdx_priv *priv = netdev_priv(netdev); |
| |
| switch (stringset) { |
| case ETH_SS_STATS: |
| BDX_ASSERT(ARRAY_SIZE(bdx_stat_names) |
| != sizeof(struct bdx_stats) / sizeof(u64)); |
| return (priv->stats_flag) ? ARRAY_SIZE(bdx_stat_names) : 0; |
| } |
| |
| return -EINVAL; |
| } |
| |
| /* |
| * bdx_get_ethtool_stats - return device's hardware L2 statistics |
| * @netdev |
| * @stats |
| * @data |
| */ |
| static void bdx_get_ethtool_stats(struct net_device *netdev, |
| struct ethtool_stats *stats, u64 *data) |
| { |
| struct bdx_priv *priv = netdev_priv(netdev); |
| |
| if (priv->stats_flag) { |
| |
| /* Update stats from HW */ |
| bdx_update_stats(priv); |
| |
| /* Copy data to user buffer */ |
| memcpy(data, &priv->hw_stats, sizeof(priv->hw_stats)); |
| } |
| } |
| |
| /* |
| * bdx_set_ethtool_ops - ethtool interface implementation |
| * @netdev |
| */ |
| static void bdx_set_ethtool_ops(struct net_device *netdev) |
| { |
| static const struct ethtool_ops bdx_ethtool_ops = { |
| .get_settings = bdx_get_settings, |
| .get_drvinfo = bdx_get_drvinfo, |
| .get_link = ethtool_op_get_link, |
| .get_coalesce = bdx_get_coalesce, |
| .set_coalesce = bdx_set_coalesce, |
| .get_ringparam = bdx_get_ringparam, |
| .set_ringparam = bdx_set_ringparam, |
| .get_strings = bdx_get_strings, |
| .get_sset_count = bdx_get_sset_count, |
| .get_ethtool_stats = bdx_get_ethtool_stats, |
| }; |
| |
| SET_ETHTOOL_OPS(netdev, &bdx_ethtool_ops); |
| } |
| |
| /** |
| * bdx_remove - Device Removal Routine |
| * @pdev: PCI device information struct |
| * |
| * bdx_remove is called by the PCI subsystem to alert the driver |
| * that it should release a PCI device. The could be caused by a |
| * Hot-Plug event, or because the driver is going to be removed from |
| * memory. |
| **/ |
| static void bdx_remove(struct pci_dev *pdev) |
| { |
| struct pci_nic *nic = pci_get_drvdata(pdev); |
| struct net_device *ndev; |
| int port; |
| |
| for (port = 0; port < nic->port_num; port++) { |
| ndev = nic->priv[port]->ndev; |
| unregister_netdev(ndev); |
| free_netdev(ndev); |
| } |
| |
| /*bdx_hw_reset_direct(nic->regs); */ |
| #ifdef BDX_MSI |
| if (nic->irq_type == IRQ_MSI) |
| pci_disable_msi(pdev); |
| #endif |
| |
| iounmap(nic->regs); |
| pci_release_regions(pdev); |
| pci_disable_device(pdev); |
| pci_set_drvdata(pdev, NULL); |
| vfree(nic); |
| |
| RET(); |
| } |
| |
| static struct pci_driver bdx_pci_driver = { |
| .name = BDX_DRV_NAME, |
| .id_table = bdx_pci_tbl, |
| .probe = bdx_probe, |
| .remove = bdx_remove, |
| }; |
| |
| /* |
| * print_driver_id - print parameters of the driver build |
| */ |
| static void __init print_driver_id(void) |
| { |
| pr_info("%s, %s\n", BDX_DRV_DESC, BDX_DRV_VERSION); |
| pr_info("Options: hw_csum %s\n", BDX_MSI_STRING); |
| } |
| |
| static int __init bdx_module_init(void) |
| { |
| ENTER; |
| init_txd_sizes(); |
| print_driver_id(); |
| RET(pci_register_driver(&bdx_pci_driver)); |
| } |
| |
| module_init(bdx_module_init); |
| |
| static void __exit bdx_module_exit(void) |
| { |
| ENTER; |
| pci_unregister_driver(&bdx_pci_driver); |
| RET(); |
| } |
| |
| module_exit(bdx_module_exit); |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_AUTHOR(DRIVER_AUTHOR); |
| MODULE_DESCRIPTION(BDX_DRV_DESC); |
| MODULE_FIRMWARE("tehuti/bdx.bin"); |