diff options
Diffstat (limited to 'drivers/net/ethernet/via/via-velocity.c')
| -rw-r--r-- | drivers/net/ethernet/via/via-velocity.c | 3744 |
1 files changed, 3744 insertions, 0 deletions
diff --git a/drivers/net/ethernet/via/via-velocity.c b/drivers/net/ethernet/via/via-velocity.c new file mode 100644 index 0000000000..731f689412 --- /dev/null +++ b/drivers/net/ethernet/via/via-velocity.c @@ -0,0 +1,3744 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * This code is derived from the VIA reference driver (copyright message + * below) provided to Red Hat by VIA Networking Technologies, Inc. for + * addition to the Linux kernel. + * + * The code has been merged into one source file, cleaned up to follow + * Linux coding style, ported to the Linux 2.6 kernel tree and cleaned + * for 64bit hardware platforms. + * + * TODO + * rx_copybreak/alignment + * More testing + * + * The changes are (c) Copyright 2004, Red Hat Inc. <alan@lxorguk.ukuu.org.uk> + * Additional fixes and clean up: Francois Romieu + * + * This source has not been verified for use in safety critical systems. + * + * Please direct queries about the revamped driver to the linux-kernel + * list not VIA. + * + * Original code: + * + * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc. + * All rights reserved. + * + * Author: Chuang Liang-Shing, AJ Jiang + * + * Date: Jan 24, 2003 + * + * MODULE_LICENSE("GPL"); + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/bitops.h> +#include <linux/init.h> +#include <linux/dma-mapping.h> +#include <linux/mm.h> +#include <linux/errno.h> +#include <linux/ioport.h> +#include <linux/pci.h> +#include <linux/kernel.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/delay.h> +#include <linux/timer.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/string.h> +#include <linux/wait.h> +#include <linux/io.h> +#include <linux/if.h> +#include <linux/uaccess.h> +#include <linux/proc_fs.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <linux/inetdevice.h> +#include <linux/platform_device.h> +#include <linux/reboot.h> +#include <linux/ethtool.h> +#include <linux/mii.h> +#include <linux/in.h> +#include <linux/if_arp.h> +#include <linux/if_vlan.h> +#include <linux/ip.h> +#include <linux/tcp.h> +#include <linux/udp.h> +#include <linux/crc-ccitt.h> +#include <linux/crc32.h> + +#include "via-velocity.h" + +enum velocity_bus_type { + BUS_PCI, + BUS_PLATFORM, +}; + +static int velocity_nics; + +static void velocity_set_power_state(struct velocity_info *vptr, char state) +{ + void *addr = vptr->mac_regs; + + if (vptr->pdev) + pci_set_power_state(vptr->pdev, state); + else + writeb(state, addr + 0x154); +} + +/** + * mac_get_cam_mask - Read a CAM mask + * @regs: register block for this velocity + * @mask: buffer to store mask + * + * Fetch the mask bits of the selected CAM and store them into the + * provided mask buffer. + */ +static void mac_get_cam_mask(struct mac_regs __iomem *regs, u8 *mask) +{ + int i; + + /* Select CAM mask */ + BYTE_REG_BITS_SET(CAMCR_PS_CAM_MASK, CAMCR_PS1 | CAMCR_PS0, ®s->CAMCR); + + writeb(0, ®s->CAMADDR); + + /* read mask */ + for (i = 0; i < 8; i++) + *mask++ = readb(&(regs->MARCAM[i])); + + /* disable CAMEN */ + writeb(0, ®s->CAMADDR); + + /* Select mar */ + BYTE_REG_BITS_SET(CAMCR_PS_MAR, CAMCR_PS1 | CAMCR_PS0, ®s->CAMCR); +} + +/** + * mac_set_cam_mask - Set a CAM mask + * @regs: register block for this velocity + * @mask: CAM mask to load + * + * Store a new mask into a CAM + */ +static void mac_set_cam_mask(struct mac_regs __iomem *regs, u8 *mask) +{ + int i; + /* Select CAM mask */ + BYTE_REG_BITS_SET(CAMCR_PS_CAM_MASK, CAMCR_PS1 | CAMCR_PS0, ®s->CAMCR); + + writeb(CAMADDR_CAMEN, ®s->CAMADDR); + + for (i = 0; i < 8; i++) + writeb(*mask++, &(regs->MARCAM[i])); + + /* disable CAMEN */ + writeb(0, ®s->CAMADDR); + + /* Select mar */ + BYTE_REG_BITS_SET(CAMCR_PS_MAR, CAMCR_PS1 | CAMCR_PS0, ®s->CAMCR); +} + +static void mac_set_vlan_cam_mask(struct mac_regs __iomem *regs, u8 *mask) +{ + int i; + /* Select CAM mask */ + BYTE_REG_BITS_SET(CAMCR_PS_CAM_MASK, CAMCR_PS1 | CAMCR_PS0, ®s->CAMCR); + + writeb(CAMADDR_CAMEN | CAMADDR_VCAMSL, ®s->CAMADDR); + + for (i = 0; i < 8; i++) + writeb(*mask++, &(regs->MARCAM[i])); + + /* disable CAMEN */ + writeb(0, ®s->CAMADDR); + + /* Select mar */ + BYTE_REG_BITS_SET(CAMCR_PS_MAR, CAMCR_PS1 | CAMCR_PS0, ®s->CAMCR); +} + +/** + * mac_set_cam - set CAM data + * @regs: register block of this velocity + * @idx: Cam index + * @addr: 2 or 6 bytes of CAM data + * + * Load an address or vlan tag into a CAM + */ +static void mac_set_cam(struct mac_regs __iomem *regs, int idx, const u8 *addr) +{ + int i; + + /* Select CAM mask */ + BYTE_REG_BITS_SET(CAMCR_PS_CAM_DATA, CAMCR_PS1 | CAMCR_PS0, ®s->CAMCR); + + idx &= (64 - 1); + + writeb(CAMADDR_CAMEN | idx, ®s->CAMADDR); + + for (i = 0; i < 6; i++) + writeb(*addr++, &(regs->MARCAM[i])); + + BYTE_REG_BITS_ON(CAMCR_CAMWR, ®s->CAMCR); + + udelay(10); + + writeb(0, ®s->CAMADDR); + + /* Select mar */ + BYTE_REG_BITS_SET(CAMCR_PS_MAR, CAMCR_PS1 | CAMCR_PS0, ®s->CAMCR); +} + +static void mac_set_vlan_cam(struct mac_regs __iomem *regs, int idx, + const u8 *addr) +{ + + /* Select CAM mask */ + BYTE_REG_BITS_SET(CAMCR_PS_CAM_DATA, CAMCR_PS1 | CAMCR_PS0, ®s->CAMCR); + + idx &= (64 - 1); + + writeb(CAMADDR_CAMEN | CAMADDR_VCAMSL | idx, ®s->CAMADDR); + writew(*((u16 *) addr), ®s->MARCAM[0]); + + BYTE_REG_BITS_ON(CAMCR_CAMWR, ®s->CAMCR); + + udelay(10); + + writeb(0, ®s->CAMADDR); + + /* Select mar */ + BYTE_REG_BITS_SET(CAMCR_PS_MAR, CAMCR_PS1 | CAMCR_PS0, ®s->CAMCR); +} + + +/** + * mac_wol_reset - reset WOL after exiting low power + * @regs: register block of this velocity + * + * Called after we drop out of wake on lan mode in order to + * reset the Wake on lan features. This function doesn't restore + * the rest of the logic from the result of sleep/wakeup + */ +static void mac_wol_reset(struct mac_regs __iomem *regs) +{ + + /* Turn off SWPTAG right after leaving power mode */ + BYTE_REG_BITS_OFF(STICKHW_SWPTAG, ®s->STICKHW); + /* clear sticky bits */ + BYTE_REG_BITS_OFF((STICKHW_DS1 | STICKHW_DS0), ®s->STICKHW); + + BYTE_REG_BITS_OFF(CHIPGCR_FCGMII, ®s->CHIPGCR); + BYTE_REG_BITS_OFF(CHIPGCR_FCMODE, ®s->CHIPGCR); + /* disable force PME-enable */ + writeb(WOLCFG_PMEOVR, ®s->WOLCFGClr); + /* disable power-event config bit */ + writew(0xFFFF, ®s->WOLCRClr); + /* clear power status */ + writew(0xFFFF, ®s->WOLSRClr); +} + +static const struct ethtool_ops velocity_ethtool_ops; + +/* + Define module options +*/ + +MODULE_AUTHOR("VIA Networking Technologies, Inc."); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("VIA Networking Velocity Family Gigabit Ethernet Adapter Driver"); + +#define VELOCITY_PARAM(N, D) \ + static int N[MAX_UNITS] = OPTION_DEFAULT;\ + module_param_array(N, int, NULL, 0); \ + MODULE_PARM_DESC(N, D); + +#define RX_DESC_MIN 64 +#define RX_DESC_MAX 255 +#define RX_DESC_DEF 64 +VELOCITY_PARAM(RxDescriptors, "Number of receive descriptors"); + +#define TX_DESC_MIN 16 +#define TX_DESC_MAX 256 +#define TX_DESC_DEF 64 +VELOCITY_PARAM(TxDescriptors, "Number of transmit descriptors"); + +#define RX_THRESH_MIN 0 +#define RX_THRESH_MAX 3 +#define RX_THRESH_DEF 0 +/* rx_thresh[] is used for controlling the receive fifo threshold. + 0: indicate the rxfifo threshold is 128 bytes. + 1: indicate the rxfifo threshold is 512 bytes. + 2: indicate the rxfifo threshold is 1024 bytes. + 3: indicate the rxfifo threshold is store & forward. +*/ +VELOCITY_PARAM(rx_thresh, "Receive fifo threshold"); + +#define DMA_LENGTH_MIN 0 +#define DMA_LENGTH_MAX 7 +#define DMA_LENGTH_DEF 6 + +/* DMA_length[] is used for controlling the DMA length + 0: 8 DWORDs + 1: 16 DWORDs + 2: 32 DWORDs + 3: 64 DWORDs + 4: 128 DWORDs + 5: 256 DWORDs + 6: SF(flush till emply) + 7: SF(flush till emply) +*/ +VELOCITY_PARAM(DMA_length, "DMA length"); + +#define IP_ALIG_DEF 0 +/* IP_byte_align[] is used for IP header DWORD byte aligned + 0: indicate the IP header won't be DWORD byte aligned.(Default) . + 1: indicate the IP header will be DWORD byte aligned. + In some environment, the IP header should be DWORD byte aligned, + or the packet will be droped when we receive it. (eg: IPVS) +*/ +VELOCITY_PARAM(IP_byte_align, "Enable IP header dword aligned"); + +#define FLOW_CNTL_DEF 1 +#define FLOW_CNTL_MIN 1 +#define FLOW_CNTL_MAX 5 + +/* flow_control[] is used for setting the flow control ability of NIC. + 1: hardware deafult - AUTO (default). Use Hardware default value in ANAR. + 2: enable TX flow control. + 3: enable RX flow control. + 4: enable RX/TX flow control. + 5: disable +*/ +VELOCITY_PARAM(flow_control, "Enable flow control ability"); + +#define MED_LNK_DEF 0 +#define MED_LNK_MIN 0 +#define MED_LNK_MAX 5 +/* speed_duplex[] is used for setting the speed and duplex mode of NIC. + 0: indicate autonegotiation for both speed and duplex mode + 1: indicate 100Mbps half duplex mode + 2: indicate 100Mbps full duplex mode + 3: indicate 10Mbps half duplex mode + 4: indicate 10Mbps full duplex mode + 5: indicate 1000Mbps full duplex mode + + Note: + if EEPROM have been set to the force mode, this option is ignored + by driver. +*/ +VELOCITY_PARAM(speed_duplex, "Setting the speed and duplex mode"); + +#define WOL_OPT_DEF 0 +#define WOL_OPT_MIN 0 +#define WOL_OPT_MAX 7 +/* wol_opts[] is used for controlling wake on lan behavior. + 0: Wake up if recevied a magic packet. (Default) + 1: Wake up if link status is on/off. + 2: Wake up if recevied an arp packet. + 4: Wake up if recevied any unicast packet. + Those value can be sumed up to support more than one option. +*/ +VELOCITY_PARAM(wol_opts, "Wake On Lan options"); + +static int rx_copybreak = 200; +module_param(rx_copybreak, int, 0644); +MODULE_PARM_DESC(rx_copybreak, "Copy breakpoint for copy-only-tiny-frames"); + +/* + * Internal board variants. At the moment we have only one + */ +static struct velocity_info_tbl chip_info_table[] = { + {CHIP_TYPE_VT6110, "VIA Networking Velocity Family Gigabit Ethernet Adapter", 1, 0x00FFFFFFUL}, + { } +}; + +/* + * Describe the PCI device identifiers that we support in this + * device driver. Used for hotplug autoloading. + */ + +static const struct pci_device_id velocity_pci_id_table[] = { + { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_612X) }, + { } +}; + +MODULE_DEVICE_TABLE(pci, velocity_pci_id_table); + +/* + * Describe the OF device identifiers that we support in this + * device driver. Used for devicetree nodes. + */ +static const struct of_device_id velocity_of_ids[] = { + { .compatible = "via,velocity-vt6110", .data = &chip_info_table[0] }, + { /* Sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, velocity_of_ids); + +/** + * get_chip_name - identifier to name + * @chip_id: chip identifier + * + * Given a chip identifier return a suitable description. Returns + * a pointer a static string valid while the driver is loaded. + */ +static const char *get_chip_name(enum chip_type chip_id) +{ + int i; + for (i = 0; chip_info_table[i].name != NULL; i++) + if (chip_info_table[i].chip_id == chip_id) + break; + return chip_info_table[i].name; +} + +/** + * velocity_set_int_opt - parser for integer options + * @opt: pointer to option value + * @val: value the user requested (or -1 for default) + * @min: lowest value allowed + * @max: highest value allowed + * @def: default value + * @name: property name + * + * Set an integer property in the module options. This function does + * all the verification and checking as well as reporting so that + * we don't duplicate code for each option. + */ +static void velocity_set_int_opt(int *opt, int val, int min, int max, int def, + char *name) +{ + if (val == -1) + *opt = def; + else if (val < min || val > max) { + pr_notice("the value of parameter %s is invalid, the valid range is (%d-%d)\n", + name, min, max); + *opt = def; + } else { + pr_info("set value of parameter %s to %d\n", name, val); + *opt = val; + } +} + +/** + * velocity_set_bool_opt - parser for boolean options + * @opt: pointer to option value + * @val: value the user requested (or -1 for default) + * @def: default value (yes/no) + * @flag: numeric value to set for true. + * @name: property name + * + * Set a boolean property in the module options. This function does + * all the verification and checking as well as reporting so that + * we don't duplicate code for each option. + */ +static void velocity_set_bool_opt(u32 *opt, int val, int def, u32 flag, + char *name) +{ + (*opt) &= (~flag); + if (val == -1) + *opt |= (def ? flag : 0); + else if (val < 0 || val > 1) { + pr_notice("the value of parameter %s is invalid, the valid range is (%d-%d)\n", + name, 0, 1); + *opt |= (def ? flag : 0); + } else { + pr_info("set parameter %s to %s\n", + name, val ? "TRUE" : "FALSE"); + *opt |= (val ? flag : 0); + } +} + +/** + * velocity_get_options - set options on device + * @opts: option structure for the device + * @index: index of option to use in module options array + * + * Turn the module and command options into a single structure + * for the current device + */ +static void velocity_get_options(struct velocity_opt *opts, int index) +{ + + velocity_set_int_opt(&opts->rx_thresh, rx_thresh[index], + RX_THRESH_MIN, RX_THRESH_MAX, RX_THRESH_DEF, + "rx_thresh"); + velocity_set_int_opt(&opts->DMA_length, DMA_length[index], + DMA_LENGTH_MIN, DMA_LENGTH_MAX, DMA_LENGTH_DEF, + "DMA_length"); + velocity_set_int_opt(&opts->numrx, RxDescriptors[index], + RX_DESC_MIN, RX_DESC_MAX, RX_DESC_DEF, + "RxDescriptors"); + velocity_set_int_opt(&opts->numtx, TxDescriptors[index], + TX_DESC_MIN, TX_DESC_MAX, TX_DESC_DEF, + "TxDescriptors"); + + velocity_set_int_opt(&opts->flow_cntl, flow_control[index], + FLOW_CNTL_MIN, FLOW_CNTL_MAX, FLOW_CNTL_DEF, + "flow_control"); + velocity_set_bool_opt(&opts->flags, IP_byte_align[index], + IP_ALIG_DEF, VELOCITY_FLAGS_IP_ALIGN, + "IP_byte_align"); + velocity_set_int_opt((int *) &opts->spd_dpx, speed_duplex[index], + MED_LNK_MIN, MED_LNK_MAX, MED_LNK_DEF, + "Media link mode"); + velocity_set_int_opt(&opts->wol_opts, wol_opts[index], + WOL_OPT_MIN, WOL_OPT_MAX, WOL_OPT_DEF, + "Wake On Lan options"); + opts->numrx = (opts->numrx & ~3); +} + +/** + * velocity_init_cam_filter - initialise CAM + * @vptr: velocity to program + * + * Initialize the content addressable memory used for filters. Load + * appropriately according to the presence of VLAN + */ +static void velocity_init_cam_filter(struct velocity_info *vptr) +{ + struct mac_regs __iomem *regs = vptr->mac_regs; + unsigned int vid, i = 0; + + /* Turn on MCFG_PQEN, turn off MCFG_RTGOPT */ + WORD_REG_BITS_SET(MCFG_PQEN, MCFG_RTGOPT, ®s->MCFG); + WORD_REG_BITS_ON(MCFG_VIDFR, ®s->MCFG); + + /* Disable all CAMs */ + memset(vptr->vCAMmask, 0, sizeof(u8) * 8); + memset(vptr->mCAMmask, 0, sizeof(u8) * 8); + mac_set_vlan_cam_mask(regs, vptr->vCAMmask); + mac_set_cam_mask(regs, vptr->mCAMmask); + + /* Enable VCAMs */ + for_each_set_bit(vid, vptr->active_vlans, VLAN_N_VID) { + mac_set_vlan_cam(regs, i, (u8 *) &vid); + vptr->vCAMmask[i / 8] |= 0x1 << (i % 8); + if (++i >= VCAM_SIZE) + break; + } + mac_set_vlan_cam_mask(regs, vptr->vCAMmask); +} + +static int velocity_vlan_rx_add_vid(struct net_device *dev, + __be16 proto, u16 vid) +{ + struct velocity_info *vptr = netdev_priv(dev); + + spin_lock_irq(&vptr->lock); + set_bit(vid, vptr->active_vlans); + velocity_init_cam_filter(vptr); + spin_unlock_irq(&vptr->lock); + return 0; +} + +static int velocity_vlan_rx_kill_vid(struct net_device *dev, + __be16 proto, u16 vid) +{ + struct velocity_info *vptr = netdev_priv(dev); + + spin_lock_irq(&vptr->lock); + clear_bit(vid, vptr->active_vlans); + velocity_init_cam_filter(vptr); + spin_unlock_irq(&vptr->lock); + return 0; +} + +static void velocity_init_rx_ring_indexes(struct velocity_info *vptr) +{ + vptr->rx.dirty = vptr->rx.filled = vptr->rx.curr = 0; +} + +/** + * velocity_rx_reset - handle a receive reset + * @vptr: velocity we are resetting + * + * Reset the ownership and status for the receive ring side. + * Hand all the receive queue to the NIC. + */ +static void velocity_rx_reset(struct velocity_info *vptr) +{ + + struct mac_regs __iomem *regs = vptr->mac_regs; + int i; + + velocity_init_rx_ring_indexes(vptr); + + /* + * Init state, all RD entries belong to the NIC + */ + for (i = 0; i < vptr->options.numrx; ++i) + vptr->rx.ring[i].rdesc0.len |= OWNED_BY_NIC; + + writew(vptr->options.numrx, ®s->RBRDU); + writel(vptr->rx.pool_dma, ®s->RDBaseLo); + writew(0, ®s->RDIdx); + writew(vptr->options.numrx - 1, ®s->RDCSize); +} + +/** + * velocity_get_opt_media_mode - get media selection + * @vptr: velocity adapter + * + * Get the media mode stored in EEPROM or module options and load + * mii_status accordingly. The requested link state information + * is also returned. + */ +static u32 velocity_get_opt_media_mode(struct velocity_info *vptr) +{ + u32 status = 0; + + switch (vptr->options.spd_dpx) { + case SPD_DPX_AUTO: + status = VELOCITY_AUTONEG_ENABLE; + break; + case SPD_DPX_100_FULL: + status = VELOCITY_SPEED_100 | VELOCITY_DUPLEX_FULL; + break; + case SPD_DPX_10_FULL: + status = VELOCITY_SPEED_10 | VELOCITY_DUPLEX_FULL; + break; + case SPD_DPX_100_HALF: + status = VELOCITY_SPEED_100; + break; + case SPD_DPX_10_HALF: + status = VELOCITY_SPEED_10; + break; + case SPD_DPX_1000_FULL: + status = VELOCITY_SPEED_1000 | VELOCITY_DUPLEX_FULL; + break; + } + vptr->mii_status = status; + return status; +} + +/** + * safe_disable_mii_autopoll - autopoll off + * @regs: velocity registers + * + * Turn off the autopoll and wait for it to disable on the chip + */ +static void safe_disable_mii_autopoll(struct mac_regs __iomem *regs) +{ + u16 ww; + + /* turn off MAUTO */ + writeb(0, ®s->MIICR); + for (ww = 0; ww < W_MAX_TIMEOUT; ww++) { + udelay(1); + if (BYTE_REG_BITS_IS_ON(MIISR_MIDLE, ®s->MIISR)) + break; + } +} + +/** + * enable_mii_autopoll - turn on autopolling + * @regs: velocity registers + * + * Enable the MII link status autopoll feature on the Velocity + * hardware. Wait for it to enable. + */ +static void enable_mii_autopoll(struct mac_regs __iomem *regs) +{ + int ii; + + writeb(0, &(regs->MIICR)); + writeb(MIIADR_SWMPL, ®s->MIIADR); + + for (ii = 0; ii < W_MAX_TIMEOUT; ii++) { + udelay(1); + if (BYTE_REG_BITS_IS_ON(MIISR_MIDLE, ®s->MIISR)) + break; + } + + writeb(MIICR_MAUTO, ®s->MIICR); + + for (ii = 0; ii < W_MAX_TIMEOUT; ii++) { + udelay(1); + if (!BYTE_REG_BITS_IS_ON(MIISR_MIDLE, ®s->MIISR)) + break; + } + +} + +/** + * velocity_mii_read - read MII data + * @regs: velocity registers + * @index: MII register index + * @data: buffer for received data + * + * Perform a single read of an MII 16bit register. Returns zero + * on success or -ETIMEDOUT if the PHY did not respond. + */ +static int velocity_mii_read(struct mac_regs __iomem *regs, u8 index, u16 *data) +{ + u16 ww; + + /* + * Disable MIICR_MAUTO, so that mii addr can be set normally + */ + safe_disable_mii_autopoll(regs); + + writeb(index, ®s->MIIADR); + + BYTE_REG_BITS_ON(MIICR_RCMD, ®s->MIICR); + + for (ww = 0; ww < W_MAX_TIMEOUT; ww++) { + if (!(readb(®s->MIICR) & MIICR_RCMD)) + break; + } + + *data = readw(®s->MIIDATA); + + enable_mii_autopoll(regs); + if (ww == W_MAX_TIMEOUT) + return -ETIMEDOUT; + return 0; +} + +/** + * mii_check_media_mode - check media state + * @regs: velocity registers + * + * Check the current MII status and determine the link status + * accordingly + */ +static u32 mii_check_media_mode(struct mac_regs __iomem *regs) +{ + u32 status = 0; + u16 ANAR; + + if (!MII_REG_BITS_IS_ON(BMSR_LSTATUS, MII_BMSR, regs)) + status |= VELOCITY_LINK_FAIL; + + if (MII_REG_BITS_IS_ON(ADVERTISE_1000FULL, MII_CTRL1000, regs)) + status |= VELOCITY_SPEED_1000 | VELOCITY_DUPLEX_FULL; + else if (MII_REG_BITS_IS_ON(ADVERTISE_1000HALF, MII_CTRL1000, regs)) + status |= (VELOCITY_SPEED_1000); + else { + velocity_mii_read(regs, MII_ADVERTISE, &ANAR); + if (ANAR & ADVERTISE_100FULL) + status |= (VELOCITY_SPEED_100 | VELOCITY_DUPLEX_FULL); + else if (ANAR & ADVERTISE_100HALF) + status |= VELOCITY_SPEED_100; + else if (ANAR & ADVERTISE_10FULL) + status |= (VELOCITY_SPEED_10 | VELOCITY_DUPLEX_FULL); + else + status |= (VELOCITY_SPEED_10); + } + + if (MII_REG_BITS_IS_ON(BMCR_ANENABLE, MII_BMCR, regs)) { + velocity_mii_read(regs, MII_ADVERTISE, &ANAR); + if ((ANAR & (ADVERTISE_100FULL | ADVERTISE_100HALF | ADVERTISE_10FULL | ADVERTISE_10HALF)) + == (ADVERTISE_100FULL | ADVERTISE_100HALF | ADVERTISE_10FULL | ADVERTISE_10HALF)) { + if (MII_REG_BITS_IS_ON(ADVERTISE_1000HALF | ADVERTISE_1000FULL, MII_CTRL1000, regs)) + status |= VELOCITY_AUTONEG_ENABLE; + } + } + + return status; +} + +/** + * velocity_mii_write - write MII data + * @regs: velocity registers + * @mii_addr: MII register index + * @data: 16bit data for the MII register + * + * Perform a single write to an MII 16bit register. Returns zero + * on success or -ETIMEDOUT if the PHY did not respond. + */ +static int velocity_mii_write(struct mac_regs __iomem *regs, u8 mii_addr, u16 data) +{ + u16 ww; + + /* + * Disable MIICR_MAUTO, so that mii addr can be set normally + */ + safe_disable_mii_autopoll(regs); + + /* MII reg offset */ + writeb(mii_addr, ®s->MIIADR); + /* set MII data */ + writew(data, ®s->MIIDATA); + + /* turn on MIICR_WCMD */ + BYTE_REG_BITS_ON(MIICR_WCMD, ®s->MIICR); + + /* W_MAX_TIMEOUT is the timeout period */ + for (ww = 0; ww < W_MAX_TIMEOUT; ww++) { + udelay(5); + if (!(readb(®s->MIICR) & MIICR_WCMD)) + break; + } + enable_mii_autopoll(regs); + + if (ww == W_MAX_TIMEOUT) + return -ETIMEDOUT; + return 0; +} + +/** + * set_mii_flow_control - flow control setup + * @vptr: velocity interface + * + * Set up the flow control on this interface according to + * the supplied user/eeprom options. + */ +static void set_mii_flow_control(struct velocity_info *vptr) +{ + /*Enable or Disable PAUSE in ANAR */ + switch (vptr->options.flow_cntl) { + case FLOW_CNTL_TX: + MII_REG_BITS_OFF(ADVERTISE_PAUSE_CAP, MII_ADVERTISE, vptr->mac_regs); + MII_REG_BITS_ON(ADVERTISE_PAUSE_ASYM, MII_ADVERTISE, vptr->mac_regs); + break; + + case FLOW_CNTL_RX: + MII_REG_BITS_ON(ADVERTISE_PAUSE_CAP, MII_ADVERTISE, vptr->mac_regs); + MII_REG_BITS_ON(ADVERTISE_PAUSE_ASYM, MII_ADVERTISE, vptr->mac_regs); + break; + + case FLOW_CNTL_TX_RX: + MII_REG_BITS_ON(ADVERTISE_PAUSE_CAP, MII_ADVERTISE, vptr->mac_regs); + MII_REG_BITS_OFF(ADVERTISE_PAUSE_ASYM, MII_ADVERTISE, vptr->mac_regs); + break; + + case FLOW_CNTL_DISABLE: + MII_REG_BITS_OFF(ADVERTISE_PAUSE_CAP, MII_ADVERTISE, vptr->mac_regs); + MII_REG_BITS_OFF(ADVERTISE_PAUSE_ASYM, MII_ADVERTISE, vptr->mac_regs); + break; + default: + break; + } +} + +/** + * mii_set_auto_on - autonegotiate on + * @vptr: velocity + * + * Enable autonegotation on this interface + */ +static void mii_set_auto_on(struct velocity_info *vptr) +{ + if (MII_REG_BITS_IS_ON(BMCR_ANENABLE, MII_BMCR, vptr->mac_regs)) + MII_REG_BITS_ON(BMCR_ANRESTART, MII_BMCR, vptr->mac_regs); + else + MII_REG_BITS_ON(BMCR_ANENABLE, MII_BMCR, vptr->mac_regs); +} + +static u32 check_connection_type(struct mac_regs __iomem *regs) +{ + u32 status = 0; + u8 PHYSR0; + u16 ANAR; + PHYSR0 = readb(®s->PHYSR0); + + /* + if (!(PHYSR0 & PHYSR0_LINKGD)) + status|=VELOCITY_LINK_FAIL; + */ + + if (PHYSR0 & PHYSR0_FDPX) + status |= VELOCITY_DUPLEX_FULL; + + if (PHYSR0 & PHYSR0_SPDG) + status |= VELOCITY_SPEED_1000; + else if (PHYSR0 & PHYSR0_SPD10) + status |= VELOCITY_SPEED_10; + else + status |= VELOCITY_SPEED_100; + + if (MII_REG_BITS_IS_ON(BMCR_ANENABLE, MII_BMCR, regs)) { + velocity_mii_read(regs, MII_ADVERTISE, &ANAR); + if ((ANAR & (ADVERTISE_100FULL | ADVERTISE_100HALF | ADVERTISE_10FULL | ADVERTISE_10HALF)) + == (ADVERTISE_100FULL | ADVERTISE_100HALF | ADVERTISE_10FULL | ADVERTISE_10HALF)) { + if (MII_REG_BITS_IS_ON(ADVERTISE_1000HALF | ADVERTISE_1000FULL, MII_CTRL1000, regs)) + status |= VELOCITY_AUTONEG_ENABLE; + } + } + + return status; +} + +/** + * velocity_set_media_mode - set media mode + * @vptr: velocity adapter + * @mii_status: old MII link state + * + * Check the media link state and configure the flow control + * PHY and also velocity hardware setup accordingly. In particular + * we need to set up CD polling and frame bursting. + */ +static int velocity_set_media_mode(struct velocity_info *vptr, u32 mii_status) +{ + struct mac_regs __iomem *regs = vptr->mac_regs; + + vptr->mii_status = mii_check_media_mode(vptr->mac_regs); + + /* Set mii link status */ + set_mii_flow_control(vptr); + + if (PHYID_GET_PHY_ID(vptr->phy_id) == PHYID_CICADA_CS8201) + MII_REG_BITS_ON(AUXCR_MDPPS, MII_NCONFIG, vptr->mac_regs); + + /* + * If connection type is AUTO + */ + if (mii_status & VELOCITY_AUTONEG_ENABLE) { + netdev_info(vptr->netdev, "Velocity is in AUTO mode\n"); + /* clear force MAC mode bit */ + BYTE_REG_BITS_OFF(CHIPGCR_FCMODE, ®s->CHIPGCR); + /* set duplex mode of MAC according to duplex mode of MII */ + MII_REG_BITS_ON(ADVERTISE_100FULL | ADVERTISE_100HALF | ADVERTISE_10FULL | ADVERTISE_10HALF, MII_ADVERTISE, vptr->mac_regs); + MII_REG_BITS_ON(ADVERTISE_1000FULL | ADVERTISE_1000HALF, MII_CTRL1000, vptr->mac_regs); + MII_REG_BITS_ON(BMCR_SPEED1000, MII_BMCR, vptr->mac_regs); + + /* enable AUTO-NEGO mode */ + mii_set_auto_on(vptr); + } else { + u16 CTRL1000; + u16 ANAR; + u8 CHIPGCR; + + /* + * 1. if it's 3119, disable frame bursting in halfduplex mode + * and enable it in fullduplex mode + * 2. set correct MII/GMII and half/full duplex mode in CHIPGCR + * 3. only enable CD heart beat counter in 10HD mode + */ + + /* set force MAC mode bit */ + BYTE_REG_BITS_ON(CHIPGCR_FCMODE, ®s->CHIPGCR); + + CHIPGCR = readb(®s->CHIPGCR); + + if (mii_status & VELOCITY_SPEED_1000) + CHIPGCR |= CHIPGCR_FCGMII; + else + CHIPGCR &= ~CHIPGCR_FCGMII; + + if (mii_status & VELOCITY_DUPLEX_FULL) { + CHIPGCR |= CHIPGCR_FCFDX; + writeb(CHIPGCR, ®s->CHIPGCR); + netdev_info(vptr->netdev, + "set Velocity to forced full mode\n"); + if (vptr->rev_id < REV_ID_VT3216_A0) + BYTE_REG_BITS_OFF(TCR_TB2BDIS, ®s->TCR); + } else { + CHIPGCR &= ~CHIPGCR_FCFDX; + netdev_info(vptr->netdev, + "set Velocity to forced half mode\n"); + writeb(CHIPGCR, ®s->CHIPGCR); + if (vptr->rev_id < REV_ID_VT3216_A0) + BYTE_REG_BITS_ON(TCR_TB2BDIS, ®s->TCR); + } + + velocity_mii_read(vptr->mac_regs, MII_CTRL1000, &CTRL1000); + CTRL1000 &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF); + if ((mii_status & VELOCITY_SPEED_1000) && + (mii_status & VELOCITY_DUPLEX_FULL)) { + CTRL1000 |= ADVERTISE_1000FULL; + } + velocity_mii_write(vptr->mac_regs, MII_CTRL1000, CTRL1000); + + if (!(mii_status & VELOCITY_DUPLEX_FULL) && (mii_status & VELOCITY_SPEED_10)) + BYTE_REG_BITS_OFF(TESTCFG_HBDIS, ®s->TESTCFG); + else + BYTE_REG_BITS_ON(TESTCFG_HBDIS, ®s->TESTCFG); + + /* MII_REG_BITS_OFF(BMCR_SPEED1000, MII_BMCR, vptr->mac_regs); */ + velocity_mii_read(vptr->mac_regs, MII_ADVERTISE, &ANAR); + ANAR &= (~(ADVERTISE_100FULL | ADVERTISE_100HALF | ADVERTISE_10FULL | ADVERTISE_10HALF)); + if (mii_status & VELOCITY_SPEED_100) { + if (mii_status & VELOCITY_DUPLEX_FULL) + ANAR |= ADVERTISE_100FULL; + else + ANAR |= ADVERTISE_100HALF; + } else if (mii_status & VELOCITY_SPEED_10) { + if (mii_status & VELOCITY_DUPLEX_FULL) + ANAR |= ADVERTISE_10FULL; + else + ANAR |= ADVERTISE_10HALF; + } + velocity_mii_write(vptr->mac_regs, MII_ADVERTISE, ANAR); + /* enable AUTO-NEGO mode */ + mii_set_auto_on(vptr); + /* MII_REG_BITS_ON(BMCR_ANENABLE, MII_BMCR, vptr->mac_regs); */ + } + /* vptr->mii_status=mii_check_media_mode(vptr->mac_regs); */ + /* vptr->mii_status=check_connection_type(vptr->mac_regs); */ + return VELOCITY_LINK_CHANGE; +} + +/** + * velocity_print_link_status - link status reporting + * @vptr: velocity to report on + * + * Turn the link status of the velocity card into a kernel log + * description of the new link state, detailing speed and duplex + * status + */ +static void velocity_print_link_status(struct velocity_info *vptr) +{ + const char *link; + const char *speed; + const char *duplex; + + if (vptr->mii_status & VELOCITY_LINK_FAIL) { + netdev_notice(vptr->netdev, "failed to detect cable link\n"); + return; + } + + if (vptr->options.spd_dpx == SPD_DPX_AUTO) { + link = "auto-negotiation"; + + if (vptr->mii_status & VELOCITY_SPEED_1000) + speed = "1000"; + else if (vptr->mii_status & VELOCITY_SPEED_100) + speed = "100"; + else + speed = "10"; + + if (vptr->mii_status & VELOCITY_DUPLEX_FULL) + duplex = "full"; + else + duplex = "half"; + } else { + link = "forced"; + + switch (vptr->options.spd_dpx) { + case SPD_DPX_1000_FULL: + speed = "1000"; + duplex = "full"; + break; + case SPD_DPX_100_HALF: + speed = "100"; + duplex = "half"; + break; + case SPD_DPX_100_FULL: + speed = "100"; + duplex = "full"; + break; + case SPD_DPX_10_HALF: + speed = "10"; + duplex = "half"; + break; + case SPD_DPX_10_FULL: + speed = "10"; + duplex = "full"; + break; + default: + speed = "unknown"; + duplex = "unknown"; + break; + } + } + netdev_notice(vptr->netdev, "Link %s speed %sM bps %s duplex\n", + link, speed, duplex); +} + +/** + * enable_flow_control_ability - flow control + * @vptr: veloity to configure + * + * Set up flow control according to the flow control options + * determined by the eeprom/configuration. + */ +static void enable_flow_control_ability(struct velocity_info *vptr) +{ + + struct mac_regs __iomem *regs = vptr->mac_regs; + + switch (vptr->options.flow_cntl) { + + case FLOW_CNTL_DEFAULT: + if (BYTE_REG_BITS_IS_ON(PHYSR0_RXFLC, ®s->PHYSR0)) + writel(CR0_FDXRFCEN, ®s->CR0Set); + else + writel(CR0_FDXRFCEN, ®s->CR0Clr); + + if (BYTE_REG_BITS_IS_ON(PHYSR0_TXFLC, ®s->PHYSR0)) + writel(CR0_FDXTFCEN, ®s->CR0Set); + else + writel(CR0_FDXTFCEN, ®s->CR0Clr); + break; + + case FLOW_CNTL_TX: + writel(CR0_FDXTFCEN, ®s->CR0Set); + writel(CR0_FDXRFCEN, ®s->CR0Clr); + break; + + case FLOW_CNTL_RX: + writel(CR0_FDXRFCEN, ®s->CR0Set); + writel(CR0_FDXTFCEN, ®s->CR0Clr); + break; + + case FLOW_CNTL_TX_RX: + writel(CR0_FDXTFCEN, ®s->CR0Set); + writel(CR0_FDXRFCEN, ®s->CR0Set); + break; + + case FLOW_CNTL_DISABLE: + writel(CR0_FDXRFCEN, ®s->CR0Clr); + writel(CR0_FDXTFCEN, ®s->CR0Clr); + break; + + default: + break; + } + +} + +/** + * velocity_soft_reset - soft reset + * @vptr: velocity to reset + * + * Kick off a soft reset of the velocity adapter and then poll + * until the reset sequence has completed before returning. + */ +static int velocity_soft_reset(struct velocity_info *vptr) +{ + struct mac_regs __iomem *regs = vptr->mac_regs; + int i = 0; + + writel(CR0_SFRST, ®s->CR0Set); + + for (i = 0; i < W_MAX_TIMEOUT; i++) { + udelay(5); + if (!DWORD_REG_BITS_IS_ON(CR0_SFRST, ®s->CR0Set)) + break; + } + + if (i == W_MAX_TIMEOUT) { + writel(CR0_FORSRST, ®s->CR0Set); + /* FIXME: PCI POSTING */ + /* delay 2ms */ + mdelay(2); + } + return 0; +} + +/** + * velocity_set_multi - filter list change callback + * @dev: network device + * + * Called by the network layer when the filter lists need to change + * for a velocity adapter. Reload the CAMs with the new address + * filter ruleset. + */ +static void velocity_set_multi(struct net_device *dev) +{ + struct velocity_info *vptr = netdev_priv(dev); + struct mac_regs __iomem *regs = vptr->mac_regs; + u8 rx_mode; + int i; + struct netdev_hw_addr *ha; + + if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */ + writel(0xffffffff, ®s->MARCAM[0]); + writel(0xffffffff, ®s->MARCAM[4]); + rx_mode = (RCR_AM | RCR_AB | RCR_PROM); + } else if ((netdev_mc_count(dev) > vptr->multicast_limit) || + (dev->flags & IFF_ALLMULTI)) { + writel(0xffffffff, ®s->MARCAM[0]); + writel(0xffffffff, ®s->MARCAM[4]); + rx_mode = (RCR_AM | RCR_AB); + } else { + int offset = MCAM_SIZE - vptr->multicast_limit; + mac_get_cam_mask(regs, vptr->mCAMmask); + + i = 0; + netdev_for_each_mc_addr(ha, dev) { + mac_set_cam(regs, i + offset, ha->addr); + vptr->mCAMmask[(offset + i) / 8] |= 1 << ((offset + i) & 7); + i++; + } + + mac_set_cam_mask(regs, vptr->mCAMmask); + rx_mode = RCR_AM | RCR_AB | RCR_AP; + } + if (dev->mtu > 1500) + rx_mode |= RCR_AL; + + BYTE_REG_BITS_ON(rx_mode, ®s->RCR); + +} + +/* + * MII access , media link mode setting functions + */ + +/** + * mii_init - set up MII + * @vptr: velocity adapter + * @mii_status: links tatus + * + * Set up the PHY for the current link state. + */ +static void mii_init(struct velocity_info *vptr, u32 mii_status) +{ + u16 BMCR; + + switch (PHYID_GET_PHY_ID(vptr->phy_id)) { + case PHYID_ICPLUS_IP101A: + MII_REG_BITS_ON((ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP), + MII_ADVERTISE, vptr->mac_regs); + if (vptr->mii_status & VELOCITY_DUPLEX_FULL) + MII_REG_BITS_ON(TCSR_ECHODIS, MII_SREVISION, + vptr->mac_regs); + else + MII_REG_BITS_OFF(TCSR_ECHODIS, MII_SREVISION, + vptr->mac_regs); + MII_REG_BITS_ON(PLED_LALBE, MII_TPISTATUS, vptr->mac_regs); + break; + case PHYID_CICADA_CS8201: + /* + * Reset to hardware default + */ + MII_REG_BITS_OFF((ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP), MII_ADVERTISE, vptr->mac_regs); + /* + * Turn on ECHODIS bit in NWay-forced full mode and turn it + * off it in NWay-forced half mode for NWay-forced v.s. + * legacy-forced issue. + */ + if (vptr->mii_status & VELOCITY_DUPLEX_FULL) + MII_REG_BITS_ON(TCSR_ECHODIS, MII_SREVISION, vptr->mac_regs); + else + MII_REG_BITS_OFF(TCSR_ECHODIS, MII_SREVISION, vptr->mac_regs); + /* + * Turn on Link/Activity LED enable bit for CIS8201 + */ + MII_REG_BITS_ON(PLED_LALBE, MII_TPISTATUS, vptr->mac_regs); + break; + case PHYID_VT3216_32BIT: + case PHYID_VT3216_64BIT: + /* + * Reset to hardware default + */ + MII_REG_BITS_ON((ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP), MII_ADVERTISE, vptr->mac_regs); + /* + * Turn on ECHODIS bit in NWay-forced full mode and turn it + * off it in NWay-forced half mode for NWay-forced v.s. + * legacy-forced issue + */ + if (vptr->mii_status & VELOCITY_DUPLEX_FULL) + MII_REG_BITS_ON(TCSR_ECHODIS, MII_SREVISION, vptr->mac_regs); + else + MII_REG_BITS_OFF(TCSR_ECHODIS, MII_SREVISION, vptr->mac_regs); + break; + + case PHYID_MARVELL_1000: + case PHYID_MARVELL_1000S: + /* + * Assert CRS on Transmit + */ + MII_REG_BITS_ON(PSCR_ACRSTX, MII_REG_PSCR, vptr->mac_regs); + /* + * Reset to hardware default + */ + MII_REG_BITS_ON((ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP), MII_ADVERTISE, vptr->mac_regs); + break; + default: + ; + } + velocity_mii_read(vptr->mac_regs, MII_BMCR, &BMCR); + if (BMCR & BMCR_ISOLATE) { + BMCR &= ~BMCR_ISOLATE; + velocity_mii_write(vptr->mac_regs, MII_BMCR, BMCR); + } +} + +/** + * setup_queue_timers - Setup interrupt timers + * @vptr: velocity adapter + * + * Setup interrupt frequency during suppression (timeout if the frame + * count isn't filled). + */ +static void setup_queue_timers(struct velocity_info *vptr) +{ + /* Only for newer revisions */ + if (vptr->rev_id >= REV_ID_VT3216_A0) { + u8 txqueue_timer = 0; + u8 rxqueue_timer = 0; + + if (vptr->mii_status & (VELOCITY_SPEED_1000 | + VELOCITY_SPEED_100)) { + txqueue_timer = vptr->options.txqueue_timer; + rxqueue_timer = vptr->options.rxqueue_timer; + } + + writeb(txqueue_timer, &vptr->mac_regs->TQETMR); + writeb(rxqueue_timer, &vptr->mac_regs->RQETMR); + } +} + +/** + * setup_adaptive_interrupts - Setup interrupt suppression + * @vptr: velocity adapter + * + * The velocity is able to suppress interrupt during high interrupt load. + * This function turns on that feature. + */ +static void setup_adaptive_interrupts(struct velocity_info *vptr) +{ + struct mac_regs __iomem *regs = vptr->mac_regs; + u16 tx_intsup = vptr->options.tx_intsup; + u16 rx_intsup = vptr->options.rx_intsup; + + /* Setup default interrupt mask (will be changed below) */ + vptr->int_mask = INT_MASK_DEF; + + /* Set Tx Interrupt Suppression Threshold */ + writeb(CAMCR_PS0, ®s->CAMCR); + if (tx_intsup != 0) { + vptr->int_mask &= ~(ISR_PTXI | ISR_PTX0I | ISR_PTX1I | + ISR_PTX2I | ISR_PTX3I); + writew(tx_intsup, ®s->ISRCTL); + } else + writew(ISRCTL_TSUPDIS, ®s->ISRCTL); + + /* Set Rx Interrupt Suppression Threshold */ + writeb(CAMCR_PS1, ®s->CAMCR); + if (rx_intsup != 0) { + vptr->int_mask &= ~ISR_PRXI; + writew(rx_intsup, ®s->ISRCTL); + } else + writew(ISRCTL_RSUPDIS, ®s->ISRCTL); + + /* Select page to interrupt hold timer */ + writeb(0, ®s->CAMCR); +} + +/** + * velocity_init_registers - initialise MAC registers + * @vptr: velocity to init + * @type: type of initialisation (hot or cold) + * + * Initialise the MAC on a reset or on first set up on the + * hardware. + */ +static void velocity_init_registers(struct velocity_info *vptr, + enum velocity_init_type type) +{ + struct mac_regs __iomem *regs = vptr->mac_regs; + struct net_device *netdev = vptr->netdev; + int i, mii_status; + + mac_wol_reset(regs); + + switch (type) { + case VELOCITY_INIT_RESET: + case VELOCITY_INIT_WOL: + + netif_stop_queue(netdev); + + /* + * Reset RX to prevent RX pointer not on the 4X location + */ + velocity_rx_reset(vptr); + mac_rx_queue_run(regs); + mac_rx_queue_wake(regs); + + mii_status = velocity_get_opt_media_mode(vptr); + if (velocity_set_media_mode(vptr, mii_status) != VELOCITY_LINK_CHANGE) { + velocity_print_link_status(vptr); + if (!(vptr->mii_status & VELOCITY_LINK_FAIL)) + netif_wake_queue(netdev); + } + + enable_flow_control_ability(vptr); + + mac_clear_isr(regs); + writel(CR0_STOP, ®s->CR0Clr); + writel((CR0_DPOLL | CR0_TXON | CR0_RXON | CR0_STRT), + ®s->CR0Set); + + break; + + case VELOCITY_INIT_COLD: + default: + /* + * Do reset + */ + velocity_soft_reset(vptr); + mdelay(5); + + if (!vptr->no_eeprom) { + mac_eeprom_reload(regs); + for (i = 0; i < 6; i++) + writeb(netdev->dev_addr[i], regs->PAR + i); + } + + /* + * clear Pre_ACPI bit. + */ + BYTE_REG_BITS_OFF(CFGA_PACPI, &(regs->CFGA)); + mac_set_rx_thresh(regs, vptr->options.rx_thresh); + mac_set_dma_length(regs, vptr->options.DMA_length); + + writeb(WOLCFG_SAM | WOLCFG_SAB, ®s->WOLCFGSet); + /* + * Back off algorithm use original IEEE standard + */ + BYTE_REG_BITS_SET(CFGB_OFSET, (CFGB_CRANDOM | CFGB_CAP | CFGB_MBA | CFGB_BAKOPT), ®s->CFGB); + + /* + * Init CAM filter + */ + velocity_init_cam_filter(vptr); + + /* + * Set packet filter: Receive directed and broadcast address + */ + velocity_set_multi(netdev); + + /* + * Enable MII auto-polling + */ + enable_mii_autopoll(regs); + + setup_adaptive_interrupts(vptr); + + writel(vptr->rx.pool_dma, ®s->RDBaseLo); + writew(vptr->options.numrx - 1, ®s->RDCSize); + mac_rx_queue_run(regs); + mac_rx_queue_wake(regs); + + writew(vptr->options.numtx - 1, ®s->TDCSize); + + for (i = 0; i < vptr->tx.numq; i++) { + writel(vptr->tx.pool_dma[i], ®s->TDBaseLo[i]); + mac_tx_queue_run(regs, i); + } + + init_flow_control_register(vptr); + + writel(CR0_STOP, ®s->CR0Clr); + writel((CR0_DPOLL | CR0_TXON | CR0_RXON | CR0_STRT), ®s->CR0Set); + + mii_status = velocity_get_opt_media_mode(vptr); + netif_stop_queue(netdev); + + mii_init(vptr, mii_status); + + if (velocity_set_media_mode(vptr, mii_status) != VELOCITY_LINK_CHANGE) { + velocity_print_link_status(vptr); + if (!(vptr->mii_status & VELOCITY_LINK_FAIL)) + netif_wake_queue(netdev); + } + + enable_flow_control_ability(vptr); + mac_hw_mibs_init(regs); + mac_write_int_mask(vptr->int_mask, regs); + mac_clear_isr(regs); + + } +} + +static void velocity_give_many_rx_descs(struct velocity_info *vptr) +{ + struct mac_regs __iomem *regs = vptr->mac_regs; + int avail, dirty, unusable; + + /* + * RD number must be equal to 4X per hardware spec + * (programming guide rev 1.20, p.13) + */ + if (vptr->rx.filled < 4) + return; + + wmb(); + + unusable = vptr->rx.filled & 0x0003; + dirty = vptr->rx.dirty - unusable; + for (avail = vptr->rx.filled & 0xfffc; avail; avail--) { + dirty = (dirty > 0) ? dirty - 1 : vptr->options.numrx - 1; + vptr->rx.ring[dirty].rdesc0.len |= OWNED_BY_NIC; + } + + writew(vptr->rx.filled & 0xfffc, ®s->RBRDU); + vptr->rx.filled = unusable; +} + +/** + * velocity_init_dma_rings - set up DMA rings + * @vptr: Velocity to set up + * + * Allocate PCI mapped DMA rings for the receive and transmit layer + * to use. + */ +static int velocity_init_dma_rings(struct velocity_info *vptr) +{ + struct velocity_opt *opt = &vptr->options; + const unsigned int rx_ring_size = opt->numrx * sizeof(struct rx_desc); + const unsigned int tx_ring_size = opt->numtx * sizeof(struct tx_desc); + dma_addr_t pool_dma; + void *pool; + unsigned int i; + + /* + * Allocate all RD/TD rings a single pool. + * + * dma_alloc_coherent() fulfills the requirement for 64 bytes + * alignment + */ + pool = dma_alloc_coherent(vptr->dev, tx_ring_size * vptr->tx.numq + + rx_ring_size, &pool_dma, GFP_ATOMIC); + if (!pool) { + dev_err(vptr->dev, "%s : DMA memory allocation failed.\n", + vptr->netdev->name); + return -ENOMEM; + } + + vptr->rx.ring = pool; + vptr->rx.pool_dma = pool_dma; + + pool += rx_ring_size; + pool_dma += rx_ring_size; + + for (i = 0; i < vptr->tx.numq; i++) { + vptr->tx.rings[i] = pool; + vptr->tx.pool_dma[i] = pool_dma; + pool += tx_ring_size; + pool_dma += tx_ring_size; + } + + return 0; +} + +static void velocity_set_rxbufsize(struct velocity_info *vptr, int mtu) +{ + vptr->rx.buf_sz = (mtu <= ETH_DATA_LEN) ? PKT_BUF_SZ : mtu + 32; +} + +/** + * velocity_alloc_rx_buf - allocate aligned receive buffer + * @vptr: velocity + * @idx: ring index + * + * Allocate a new full sized buffer for the reception of a frame and + * map it into PCI space for the hardware to use. The hardware + * requires *64* byte alignment of the buffer which makes life + * less fun than would be ideal. + */ +static int velocity_alloc_rx_buf(struct velocity_info *vptr, int idx) +{ + struct rx_desc *rd = &(vptr->rx.ring[idx]); + struct velocity_rd_info *rd_info = &(vptr->rx.info[idx]); + + rd_info->skb = netdev_alloc_skb(vptr->netdev, vptr->rx.buf_sz + 64); + if (rd_info->skb == NULL) + return -ENOMEM; + + /* + * Do the gymnastics to get the buffer head for data at + * 64byte alignment. + */ + skb_reserve(rd_info->skb, + 64 - ((unsigned long) rd_info->skb->data & 63)); + rd_info->skb_dma = dma_map_single(vptr->dev, rd_info->skb->data, + vptr->rx.buf_sz, DMA_FROM_DEVICE); + + /* + * Fill in the descriptor to match + */ + + *((u32 *) & (rd->rdesc0)) = 0; + rd->size = cpu_to_le16(vptr->rx.buf_sz) | RX_INTEN; + rd->pa_low = cpu_to_le32(rd_info->skb_dma); + rd->pa_high = 0; + return 0; +} + + +static int velocity_rx_refill(struct velocity_info *vptr) +{ + int dirty = vptr->rx.dirty, done = 0; + + do { + struct rx_desc *rd = vptr->rx.ring + dirty; + + /* Fine for an all zero Rx desc at init time as well */ + if (rd->rdesc0.len & OWNED_BY_NIC) + break; + + if (!vptr->rx.info[dirty].skb) { + if (velocity_alloc_rx_buf(vptr, dirty) < 0) + break; + } + done++; + dirty = (dirty < vptr->options.numrx - 1) ? dirty + 1 : 0; + } while (dirty != vptr->rx.curr); + + if (done) { + vptr->rx.dirty = dirty; + vptr->rx.filled += done; + } + + return done; +} + +/** + * velocity_free_rd_ring - free receive ring + * @vptr: velocity to clean up + * + * Free the receive buffers for each ring slot and any + * attached socket buffers that need to go away. + */ +static void velocity_free_rd_ring(struct velocity_info *vptr) +{ + int i; + + if (vptr->rx.info == NULL) + return; + + for (i = 0; i < vptr->options.numrx; i++) { + struct velocity_rd_info *rd_info = &(vptr->rx.info[i]); + struct rx_desc *rd = vptr->rx.ring + i; + + memset(rd, 0, sizeof(*rd)); + + if (!rd_info->skb) + continue; + dma_unmap_single(vptr->dev, rd_info->skb_dma, vptr->rx.buf_sz, + DMA_FROM_DEVICE); + rd_info->skb_dma = 0; + + dev_kfree_skb(rd_info->skb); + rd_info->skb = NULL; + } + + kfree(vptr->rx.info); + vptr->rx.info = NULL; +} + +/** + * velocity_init_rd_ring - set up receive ring + * @vptr: velocity to configure + * + * Allocate and set up the receive buffers for each ring slot and + * assign them to the network adapter. + */ +static int velocity_init_rd_ring(struct velocity_info *vptr) +{ + int ret = -ENOMEM; + + vptr->rx.info = kcalloc(vptr->options.numrx, + sizeof(struct velocity_rd_info), GFP_KERNEL); + if (!vptr->rx.info) + goto out; + + velocity_init_rx_ring_indexes(vptr); + + if (velocity_rx_refill(vptr) != vptr->options.numrx) { + netdev_err(vptr->netdev, "failed to allocate RX buffer\n"); + velocity_free_rd_ring(vptr); + goto out; + } + + ret = 0; +out: + return ret; +} + +/** + * velocity_init_td_ring - set up transmit ring + * @vptr: velocity + * + * Set up the transmit ring and chain the ring pointers together. + * Returns zero on success or a negative posix errno code for + * failure. + */ +static int velocity_init_td_ring(struct velocity_info *vptr) +{ + int j; + + /* Init the TD ring entries */ + for (j = 0; j < vptr->tx.numq; j++) { + + vptr->tx.infos[j] = kcalloc(vptr->options.numtx, + sizeof(struct velocity_td_info), + GFP_KERNEL); + if (!vptr->tx.infos[j]) { + while (--j >= 0) + kfree(vptr->tx.infos[j]); + return -ENOMEM; + } + + vptr->tx.tail[j] = vptr->tx.curr[j] = vptr->tx.used[j] = 0; + } + return 0; +} + +/** + * velocity_free_dma_rings - free PCI ring pointers + * @vptr: Velocity to free from + * + * Clean up the PCI ring buffers allocated to this velocity. + */ +static void velocity_free_dma_rings(struct velocity_info *vptr) +{ + const int size = vptr->options.numrx * sizeof(struct rx_desc) + + vptr->options.numtx * sizeof(struct tx_desc) * vptr->tx.numq; + + dma_free_coherent(vptr->dev, size, vptr->rx.ring, vptr->rx.pool_dma); +} + +static int velocity_init_rings(struct velocity_info *vptr, int mtu) +{ + int ret; + + velocity_set_rxbufsize(vptr, mtu); + + ret = velocity_init_dma_rings(vptr); + if (ret < 0) + goto out; + + ret = velocity_init_rd_ring(vptr); + if (ret < 0) + goto err_free_dma_rings_0; + + ret = velocity_init_td_ring(vptr); + if (ret < 0) + goto err_free_rd_ring_1; +out: + return ret; + +err_free_rd_ring_1: + velocity_free_rd_ring(vptr); +err_free_dma_rings_0: + velocity_free_dma_rings(vptr); + goto out; +} + +/** + * velocity_free_tx_buf - free transmit buffer + * @vptr: velocity + * @tdinfo: buffer + * @td: transmit descriptor to free + * + * Release an transmit buffer. If the buffer was preallocated then + * recycle it, if not then unmap the buffer. + */ +static void velocity_free_tx_buf(struct velocity_info *vptr, + struct velocity_td_info *tdinfo, struct tx_desc *td) +{ + struct sk_buff *skb = tdinfo->skb; + int i; + + /* + * Don't unmap the pre-allocated tx_bufs + */ + for (i = 0; i < tdinfo->nskb_dma; i++) { + size_t pktlen = max_t(size_t, skb->len, ETH_ZLEN); + + /* For scatter-gather */ + if (skb_shinfo(skb)->nr_frags > 0) + pktlen = max_t(size_t, pktlen, + td->td_buf[i].size & ~TD_QUEUE); + + dma_unmap_single(vptr->dev, tdinfo->skb_dma[i], + le16_to_cpu(pktlen), DMA_TO_DEVICE); + } + dev_consume_skb_irq(skb); + tdinfo->skb = NULL; +} + +/* + * FIXME: could we merge this with velocity_free_tx_buf ? + */ +static void velocity_free_td_ring_entry(struct velocity_info *vptr, + int q, int n) +{ + struct velocity_td_info *td_info = &(vptr->tx.infos[q][n]); + int i; + + if (td_info == NULL) + return; + + if (td_info->skb) { + for (i = 0; i < td_info->nskb_dma; i++) { + if (td_info->skb_dma[i]) { + dma_unmap_single(vptr->dev, td_info->skb_dma[i], + td_info->skb->len, DMA_TO_DEVICE); + td_info->skb_dma[i] = 0; + } + } + dev_kfree_skb(td_info->skb); + td_info->skb = NULL; + } +} + +/** + * velocity_free_td_ring - free td ring + * @vptr: velocity + * + * Free up the transmit ring for this particular velocity adapter. + * We free the ring contents but not the ring itself. + */ +static void velocity_free_td_ring(struct velocity_info *vptr) +{ + int i, j; + + for (j = 0; j < vptr->tx.numq; j++) { + if (vptr->tx.infos[j] == NULL) + continue; + for (i = 0; i < vptr->options.numtx; i++) + velocity_free_td_ring_entry(vptr, j, i); + + kfree(vptr->tx.infos[j]); + vptr->tx.infos[j] = NULL; + } +} + +static void velocity_free_rings(struct velocity_info *vptr) +{ + velocity_free_td_ring(vptr); + velocity_free_rd_ring(vptr); + velocity_free_dma_rings(vptr); +} + +/** + * velocity_error - handle error from controller + * @vptr: velocity + * @status: card status + * + * Process an error report from the hardware and attempt to recover + * the card itself. At the moment we cannot recover from some + * theoretically impossible errors but this could be fixed using + * the pci_device_failed logic to bounce the hardware + * + */ +static void velocity_error(struct velocity_info *vptr, int status) +{ + + if (status & ISR_TXSTLI) { + struct mac_regs __iomem *regs = vptr->mac_regs; + + netdev_err(vptr->netdev, "TD structure error TDindex=%hx\n", + readw(®s->TDIdx[0])); + BYTE_REG_BITS_ON(TXESR_TDSTR, ®s->TXESR); + writew(TRDCSR_RUN, ®s->TDCSRClr); + netif_stop_queue(vptr->netdev); + + /* FIXME: port over the pci_device_failed code and use it + here */ + } + + if (status & ISR_SRCI) { + struct mac_regs __iomem *regs = vptr->mac_regs; + int linked; + + if (vptr->options.spd_dpx == SPD_DPX_AUTO) { + vptr->mii_status = check_connection_type(regs); + + /* + * If it is a 3119, disable frame bursting in + * halfduplex mode and enable it in fullduplex + * mode + */ + if (vptr->rev_id < REV_ID_VT3216_A0) { + if (vptr->mii_status & VELOCITY_DUPLEX_FULL) + BYTE_REG_BITS_ON(TCR_TB2BDIS, ®s->TCR); + else + BYTE_REG_BITS_OFF(TCR_TB2BDIS, ®s->TCR); + } + /* + * Only enable CD heart beat counter in 10HD mode + */ + if (!(vptr->mii_status & VELOCITY_DUPLEX_FULL) && (vptr->mii_status & VELOCITY_SPEED_10)) + BYTE_REG_BITS_OFF(TESTCFG_HBDIS, ®s->TESTCFG); + else + BYTE_REG_BITS_ON(TESTCFG_HBDIS, ®s->TESTCFG); + + setup_queue_timers(vptr); + } + /* + * Get link status from PHYSR0 + */ + linked = readb(®s->PHYSR0) & PHYSR0_LINKGD; + + if (linked) { + vptr->mii_status &= ~VELOCITY_LINK_FAIL; + netif_carrier_on(vptr->netdev); + } else { + vptr->mii_status |= VELOCITY_LINK_FAIL; + netif_carrier_off(vptr->netdev); + } + + velocity_print_link_status(vptr); + enable_flow_control_ability(vptr); + + /* + * Re-enable auto-polling because SRCI will disable + * auto-polling + */ + + enable_mii_autopoll(regs); + + if (vptr->mii_status & VELOCITY_LINK_FAIL) + netif_stop_queue(vptr->netdev); + else + netif_wake_queue(vptr->netdev); + + } + if (status & ISR_MIBFI) + velocity_update_hw_mibs(vptr); + if (status & ISR_LSTEI) + mac_rx_queue_wake(vptr->mac_regs); +} + +/** + * velocity_tx_srv - transmit interrupt service + * @vptr: Velocity + * + * Scan the queues looking for transmitted packets that + * we can complete and clean up. Update any statistics as + * necessary/ + */ +static int velocity_tx_srv(struct velocity_info *vptr) +{ + struct tx_desc *td; + int qnum; + int full = 0; + int idx; + int works = 0; + struct velocity_td_info *tdinfo; + struct net_device_stats *stats = &vptr->netdev->stats; + + for (qnum = 0; qnum < vptr->tx.numq; qnum++) { + for (idx = vptr->tx.tail[qnum]; vptr->tx.used[qnum] > 0; + idx = (idx + 1) % vptr->options.numtx) { + + /* + * Get Tx Descriptor + */ + td = &(vptr->tx.rings[qnum][idx]); + tdinfo = &(vptr->tx.infos[qnum][idx]); + + if (td->tdesc0.len & OWNED_BY_NIC) + break; + + if ((works++ > 15)) + break; + + if (td->tdesc0.TSR & TSR0_TERR) { + stats->tx_errors++; + stats->tx_dropped++; + if (td->tdesc0.TSR & TSR0_CDH) + stats->tx_heartbeat_errors++; + if (td->tdesc0.TSR & TSR0_CRS) + stats->tx_carrier_errors++; + if (td->tdesc0.TSR & TSR0_ABT) + stats->tx_aborted_errors++; + if (td->tdesc0.TSR & TSR0_OWC) + stats->tx_window_errors++; + } else { + stats->tx_packets++; + stats->tx_bytes += tdinfo->skb->len; + } + velocity_free_tx_buf(vptr, tdinfo, td); + vptr->tx.used[qnum]--; + } + vptr->tx.tail[qnum] = idx; + + if (AVAIL_TD(vptr, qnum) < 1) + full = 1; + } + /* + * Look to see if we should kick the transmit network + * layer for more work. + */ + if (netif_queue_stopped(vptr->netdev) && (full == 0) && + (!(vptr->mii_status & VELOCITY_LINK_FAIL))) { + netif_wake_queue(vptr->netdev); + } + return works; +} + +/** + * velocity_rx_csum - checksum process + * @rd: receive packet descriptor + * @skb: network layer packet buffer + * + * Process the status bits for the received packet and determine + * if the checksum was computed and verified by the hardware + */ +static inline void velocity_rx_csum(struct rx_desc *rd, struct sk_buff *skb) +{ + skb_checksum_none_assert(skb); + + if (rd->rdesc1.CSM & CSM_IPKT) { + if (rd->rdesc1.CSM & CSM_IPOK) { + if ((rd->rdesc1.CSM & CSM_TCPKT) || + (rd->rdesc1.CSM & CSM_UDPKT)) { + if (!(rd->rdesc1.CSM & CSM_TUPOK)) + return; + } + skb->ip_summed = CHECKSUM_UNNECESSARY; + } + } +} + +/** + * velocity_rx_copy - in place Rx copy for small packets + * @rx_skb: network layer packet buffer candidate + * @pkt_size: received data size + * @vptr: velocity adapter + * + * Replace the current skb that is scheduled for Rx processing by a + * shorter, immediately allocated skb, if the received packet is small + * enough. This function returns a negative value if the received + * packet is too big or if memory is exhausted. + */ +static int velocity_rx_copy(struct sk_buff **rx_skb, int pkt_size, + struct velocity_info *vptr) +{ + int ret = -1; + if (pkt_size < rx_copybreak) { + struct sk_buff *new_skb; + + new_skb = netdev_alloc_skb_ip_align(vptr->netdev, pkt_size); + if (new_skb) { + new_skb->ip_summed = rx_skb[0]->ip_summed; + skb_copy_from_linear_data(*rx_skb, new_skb->data, pkt_size); + *rx_skb = new_skb; + ret = 0; + } + + } + return ret; +} + +/** + * velocity_iph_realign - IP header alignment + * @vptr: velocity we are handling + * @skb: network layer packet buffer + * @pkt_size: received data size + * + * Align IP header on a 2 bytes boundary. This behavior can be + * configured by the user. + */ +static inline void velocity_iph_realign(struct velocity_info *vptr, + struct sk_buff *skb, int pkt_size) +{ + if (vptr->flags & VELOCITY_FLAGS_IP_ALIGN) { + memmove(skb->data + 2, skb->data, pkt_size); + skb_reserve(skb, 2); + } +} + +/** + * velocity_receive_frame - received packet processor + * @vptr: velocity we are handling + * @idx: ring index + * + * A packet has arrived. We process the packet and if appropriate + * pass the frame up the network stack + */ +static int velocity_receive_frame(struct velocity_info *vptr, int idx) +{ + struct net_device_stats *stats = &vptr->netdev->stats; + struct velocity_rd_info *rd_info = &(vptr->rx.info[idx]); + struct rx_desc *rd = &(vptr->rx.ring[idx]); + int pkt_len = le16_to_cpu(rd->rdesc0.len) & 0x3fff; + struct sk_buff *skb; + + if (unlikely(rd->rdesc0.RSR & (RSR_STP | RSR_EDP | RSR_RL))) { + if (rd->rdesc0.RSR & (RSR_STP | RSR_EDP)) + netdev_err(vptr->netdev, "received frame spans multiple RDs\n"); + stats->rx_length_errors++; + return -EINVAL; + } + + if (rd->rdesc0.RSR & RSR_MAR) + stats->multicast++; + + skb = rd_info->skb; + + dma_sync_single_for_cpu(vptr->dev, rd_info->skb_dma, + vptr->rx.buf_sz, DMA_FROM_DEVICE); + + velocity_rx_csum(rd, skb); + + if (velocity_rx_copy(&skb, pkt_len, vptr) < 0) { + velocity_iph_realign(vptr, skb, pkt_len); + rd_info->skb = NULL; + dma_unmap_single(vptr->dev, rd_info->skb_dma, vptr->rx.buf_sz, + DMA_FROM_DEVICE); + } else { + dma_sync_single_for_device(vptr->dev, rd_info->skb_dma, + vptr->rx.buf_sz, DMA_FROM_DEVICE); + } + + skb_put(skb, pkt_len - 4); + skb->protocol = eth_type_trans(skb, vptr->netdev); + + if (rd->rdesc0.RSR & RSR_DETAG) { + u16 vid = swab16(le16_to_cpu(rd->rdesc1.PQTAG)); + + __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); + } + netif_receive_skb(skb); + + stats->rx_bytes += pkt_len; + stats->rx_packets++; + + return 0; +} + +/** + * velocity_rx_srv - service RX interrupt + * @vptr: velocity + * @budget_left: remaining budget + * + * Walk the receive ring of the velocity adapter and remove + * any received packets from the receive queue. Hand the ring + * slots back to the adapter for reuse. + */ +static int velocity_rx_srv(struct velocity_info *vptr, int budget_left) +{ + struct net_device_stats *stats = &vptr->netdev->stats; + int rd_curr = vptr->rx.curr; + int works = 0; + + while (works < budget_left) { + struct rx_desc *rd = vptr->rx.ring + rd_curr; + + if (!vptr->rx.info[rd_curr].skb) + break; + + if (rd->rdesc0.len & OWNED_BY_NIC) + break; + + rmb(); + + /* + * Don't drop CE or RL error frame although RXOK is off + */ + if (rd->rdesc0.RSR & (RSR_RXOK | RSR_CE | RSR_RL)) { + if (velocity_receive_frame(vptr, rd_curr) < 0) + stats->rx_dropped++; + } else { + if (rd->rdesc0.RSR & RSR_CRC) + stats->rx_crc_errors++; + if (rd->rdesc0.RSR & RSR_FAE) + stats->rx_frame_errors++; + + stats->rx_dropped++; + } + + rd->size |= RX_INTEN; + + rd_curr++; + if (rd_curr >= vptr->options.numrx) + rd_curr = 0; + works++; + } + + vptr->rx.curr = rd_curr; + + if ((works > 0) && (velocity_rx_refill(vptr) > 0)) + velocity_give_many_rx_descs(vptr); + + VAR_USED(stats); + return works; +} + +static int velocity_poll(struct napi_struct *napi, int budget) +{ + struct velocity_info *vptr = container_of(napi, + struct velocity_info, napi); + unsigned int rx_done; + unsigned long flags; + + /* + * Do rx and tx twice for performance (taken from the VIA + * out-of-tree driver). + */ + rx_done = velocity_rx_srv(vptr, budget); + spin_lock_irqsave(&vptr->lock, flags); + velocity_tx_srv(vptr); + /* If budget not fully consumed, exit the polling mode */ + if (rx_done < budget) { + napi_complete_done(napi, rx_done); + mac_enable_int(vptr->mac_regs); + } + spin_unlock_irqrestore(&vptr->lock, flags); + + return rx_done; +} + +/** + * velocity_intr - interrupt callback + * @irq: interrupt number + * @dev_instance: interrupting device + * + * Called whenever an interrupt is generated by the velocity + * adapter IRQ line. We may not be the source of the interrupt + * and need to identify initially if we are, and if not exit as + * efficiently as possible. + */ +static irqreturn_t velocity_intr(int irq, void *dev_instance) +{ + struct net_device *dev = dev_instance; + struct velocity_info *vptr = netdev_priv(dev); + u32 isr_status; + + spin_lock(&vptr->lock); + isr_status = mac_read_isr(vptr->mac_regs); + + /* Not us ? */ + if (isr_status == 0) { + spin_unlock(&vptr->lock); + return IRQ_NONE; + } + + /* Ack the interrupt */ + mac_write_isr(vptr->mac_regs, isr_status); + + if (likely(napi_schedule_prep(&vptr->napi))) { + mac_disable_int(vptr->mac_regs); + __napi_schedule(&vptr->napi); + } + + if (isr_status & (~(ISR_PRXI | ISR_PPRXI | ISR_PTXI | ISR_PPTXI))) + velocity_error(vptr, isr_status); + + spin_unlock(&vptr->lock); + + return IRQ_HANDLED; +} + +/** + * velocity_open - interface activation callback + * @dev: network layer device to open + * + * Called when the network layer brings the interface up. Returns + * a negative posix error code on failure, or zero on success. + * + * All the ring allocation and set up is done on open for this + * adapter to minimise memory usage when inactive + */ +static int velocity_open(struct net_device *dev) +{ + struct velocity_info *vptr = netdev_priv(dev); + int ret; + + ret = velocity_init_rings(vptr, dev->mtu); + if (ret < 0) + goto out; + + /* Ensure chip is running */ + velocity_set_power_state(vptr, PCI_D0); + + velocity_init_registers(vptr, VELOCITY_INIT_COLD); + + ret = request_irq(dev->irq, velocity_intr, IRQF_SHARED, + dev->name, dev); + if (ret < 0) { + /* Power down the chip */ + velocity_set_power_state(vptr, PCI_D3hot); + velocity_free_rings(vptr); + goto out; + } + + velocity_give_many_rx_descs(vptr); + + mac_enable_int(vptr->mac_regs); + netif_start_queue(dev); + napi_enable(&vptr->napi); + vptr->flags |= VELOCITY_FLAGS_OPENED; +out: + return ret; +} + +/** + * velocity_shutdown - shut down the chip + * @vptr: velocity to deactivate + * + * Shuts down the internal operations of the velocity and + * disables interrupts, autopolling, transmit and receive + */ +static void velocity_shutdown(struct velocity_info *vptr) +{ + struct mac_regs __iomem *regs = vptr->mac_regs; + mac_disable_int(regs); + writel(CR0_STOP, ®s->CR0Set); + writew(0xFFFF, ®s->TDCSRClr); + writeb(0xFF, ®s->RDCSRClr); + safe_disable_mii_autopoll(regs); + mac_clear_isr(regs); +} + +/** + * velocity_change_mtu - MTU change callback + * @dev: network device + * @new_mtu: desired MTU + * + * Handle requests from the networking layer for MTU change on + * this interface. It gets called on a change by the network layer. + * Return zero for success or negative posix error code. + */ +static int velocity_change_mtu(struct net_device *dev, int new_mtu) +{ + struct velocity_info *vptr = netdev_priv(dev); + int ret = 0; + + if (!netif_running(dev)) { + dev->mtu = new_mtu; + goto out_0; + } + + if (dev->mtu != new_mtu) { + struct velocity_info *tmp_vptr; + unsigned long flags; + struct rx_info rx; + struct tx_info tx; + + tmp_vptr = kzalloc(sizeof(*tmp_vptr), GFP_KERNEL); + if (!tmp_vptr) { + ret = -ENOMEM; + goto out_0; + } + + tmp_vptr->netdev = dev; + tmp_vptr->pdev = vptr->pdev; + tmp_vptr->dev = vptr->dev; + tmp_vptr->options = vptr->options; + tmp_vptr->tx.numq = vptr->tx.numq; + + ret = velocity_init_rings(tmp_vptr, new_mtu); + if (ret < 0) + goto out_free_tmp_vptr_1; + + napi_disable(&vptr->napi); + + spin_lock_irqsave(&vptr->lock, flags); + + netif_stop_queue(dev); + velocity_shutdown(vptr); + + rx = vptr->rx; + tx = vptr->tx; + + vptr->rx = tmp_vptr->rx; + vptr->tx = tmp_vptr->tx; + + tmp_vptr->rx = rx; + tmp_vptr->tx = tx; + + dev->mtu = new_mtu; + + velocity_init_registers(vptr, VELOCITY_INIT_COLD); + + velocity_give_many_rx_descs(vptr); + + napi_enable(&vptr->napi); + + mac_enable_int(vptr->mac_regs); + netif_start_queue(dev); + + spin_unlock_irqrestore(&vptr->lock, flags); + + velocity_free_rings(tmp_vptr); + +out_free_tmp_vptr_1: + kfree(tmp_vptr); + } +out_0: + return ret; +} + +#ifdef CONFIG_NET_POLL_CONTROLLER +/** + * velocity_poll_controller - Velocity Poll controller function + * @dev: network device + * + * + * Used by NETCONSOLE and other diagnostic tools to allow network I/P + * with interrupts disabled. + */ +static void velocity_poll_controller(struct net_device *dev) +{ + disable_irq(dev->irq); + velocity_intr(dev->irq, dev); + enable_irq(dev->irq); +} +#endif + +/** + * velocity_mii_ioctl - MII ioctl handler + * @dev: network device + * @ifr: the ifreq block for the ioctl + * @cmd: the command + * + * Process MII requests made via ioctl from the network layer. These + * are used by tools like kudzu to interrogate the link state of the + * hardware + */ +static int velocity_mii_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) +{ + struct velocity_info *vptr = netdev_priv(dev); + struct mac_regs __iomem *regs = vptr->mac_regs; + unsigned long flags; + struct mii_ioctl_data *miidata = if_mii(ifr); + int err; + + switch (cmd) { + case SIOCGMIIPHY: + miidata->phy_id = readb(®s->MIIADR) & 0x1f; + break; + case SIOCGMIIREG: + if (velocity_mii_read(vptr->mac_regs, miidata->reg_num & 0x1f, &(miidata->val_out)) < 0) + return -ETIMEDOUT; + break; + case SIOCSMIIREG: + spin_lock_irqsave(&vptr->lock, flags); + err = velocity_mii_write(vptr->mac_regs, miidata->reg_num & 0x1f, miidata->val_in); + spin_unlock_irqrestore(&vptr->lock, flags); + check_connection_type(vptr->mac_regs); + if (err) + return err; + break; + default: + return -EOPNOTSUPP; + } + return 0; +} + +/** + * velocity_ioctl - ioctl entry point + * @dev: network device + * @rq: interface request ioctl + * @cmd: command code + * + * Called when the user issues an ioctl request to the network + * device in question. The velocity interface supports MII. + */ +static int velocity_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) +{ + struct velocity_info *vptr = netdev_priv(dev); + int ret; + + /* If we are asked for information and the device is power + saving then we need to bring the device back up to talk to it */ + + if (!netif_running(dev)) + velocity_set_power_state(vptr, PCI_D0); + + switch (cmd) { + case SIOCGMIIPHY: /* Get address of MII PHY in use. */ + case SIOCGMIIREG: /* Read MII PHY register. */ + case SIOCSMIIREG: /* Write to MII PHY register. */ + ret = velocity_mii_ioctl(dev, rq, cmd); + break; + + default: + ret = -EOPNOTSUPP; + } + if (!netif_running(dev)) + velocity_set_power_state(vptr, PCI_D3hot); + + + return ret; +} + +/** + * velocity_get_stats - statistics callback + * @dev: network device + * + * Callback from the network layer to allow driver statistics + * to be resynchronized with hardware collected state. In the + * case of the velocity we need to pull the MIB counters from + * the hardware into the counters before letting the network + * layer display them. + */ +static struct net_device_stats *velocity_get_stats(struct net_device *dev) +{ + struct velocity_info *vptr = netdev_priv(dev); + + /* If the hardware is down, don't touch MII */ + if (!netif_running(dev)) + return &dev->stats; + + spin_lock_irq(&vptr->lock); + velocity_update_hw_mibs(vptr); + spin_unlock_irq(&vptr->lock); + + dev->stats.rx_packets = vptr->mib_counter[HW_MIB_ifRxAllPkts]; + dev->stats.rx_errors = vptr->mib_counter[HW_MIB_ifRxErrorPkts]; + dev->stats.rx_length_errors = vptr->mib_counter[HW_MIB_ifInRangeLengthErrors]; + +// unsigned long rx_dropped; /* no space in linux buffers */ + dev->stats.collisions = vptr->mib_counter[HW_MIB_ifTxEtherCollisions]; + /* detailed rx_errors: */ +// unsigned long rx_length_errors; +// unsigned long rx_over_errors; /* receiver ring buff overflow */ + dev->stats.rx_crc_errors = vptr->mib_counter[HW_MIB_ifRxPktCRCE]; +// unsigned long rx_frame_errors; /* recv'd frame alignment error */ +// unsigned long rx_fifo_errors; /* recv'r fifo overrun */ +// unsigned long rx_missed_errors; /* receiver missed packet */ + + /* detailed tx_errors */ +// unsigned long tx_fifo_errors; + + return &dev->stats; +} + +/** + * velocity_close - close adapter callback + * @dev: network device + * + * Callback from the network layer when the velocity is being + * deactivated by the network layer + */ +static int velocity_close(struct net_device *dev) +{ + struct velocity_info *vptr = netdev_priv(dev); + + napi_disable(&vptr->napi); + netif_stop_queue(dev); + velocity_shutdown(vptr); + + if (vptr->flags & VELOCITY_FLAGS_WOL_ENABLED) + velocity_get_ip(vptr); + + free_irq(dev->irq, dev); + + velocity_free_rings(vptr); + + vptr->flags &= (~VELOCITY_FLAGS_OPENED); + return 0; +} + +/** + * velocity_xmit - transmit packet callback + * @skb: buffer to transmit + * @dev: network device + * + * Called by the network layer to request a packet is queued to + * the velocity. Returns zero on success. + */ +static netdev_tx_t velocity_xmit(struct sk_buff *skb, + struct net_device *dev) +{ + struct velocity_info *vptr = netdev_priv(dev); + int qnum = 0; + struct tx_desc *td_ptr; + struct velocity_td_info *tdinfo; + unsigned long flags; + int pktlen; + int index, prev; + int i = 0; + + if (skb_padto(skb, ETH_ZLEN)) + goto out; + + /* The hardware can handle at most 7 memory segments, so merge + * the skb if there are more */ + if (skb_shinfo(skb)->nr_frags > 6 && __skb_linearize(skb)) { + dev_kfree_skb_any(skb); + return NETDEV_TX_OK; + } + + pktlen = skb_shinfo(skb)->nr_frags == 0 ? + max_t(unsigned int, skb->len, ETH_ZLEN) : + skb_headlen(skb); + + spin_lock_irqsave(&vptr->lock, flags); + + index = vptr->tx.curr[qnum]; + td_ptr = &(vptr->tx.rings[qnum][index]); + tdinfo = &(vptr->tx.infos[qnum][index]); + + td_ptr->tdesc1.TCR = TCR0_TIC; + td_ptr->td_buf[0].size &= ~TD_QUEUE; + + /* + * Map the linear network buffer into PCI space and + * add it to the transmit ring. + */ + tdinfo->skb = skb; + tdinfo->skb_dma[0] = dma_map_single(vptr->dev, skb->data, pktlen, + DMA_TO_DEVICE); + td_ptr->tdesc0.len = cpu_to_le16(pktlen); + td_ptr->td_buf[0].pa_low = cpu_to_le32(tdinfo->skb_dma[0]); + td_ptr->td_buf[0].pa_high = 0; + td_ptr->td_buf[0].size = cpu_to_le16(pktlen); + + /* Handle fragments */ + for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { + const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; + + tdinfo->skb_dma[i + 1] = skb_frag_dma_map(vptr->dev, + frag, 0, + skb_frag_size(frag), + DMA_TO_DEVICE); + + td_ptr->td_buf[i + 1].pa_low = cpu_to_le32(tdinfo->skb_dma[i + 1]); + td_ptr->td_buf[i + 1].pa_high = 0; + td_ptr->td_buf[i + 1].size = cpu_to_le16(skb_frag_size(frag)); + } + tdinfo->nskb_dma = i + 1; + + td_ptr->tdesc1.cmd = TCPLS_NORMAL + (tdinfo->nskb_dma + 1) * 16; + + if (skb_vlan_tag_present(skb)) { + td_ptr->tdesc1.vlan = cpu_to_le16(skb_vlan_tag_get(skb)); + td_ptr->tdesc1.TCR |= TCR0_VETAG; + } + + /* + * Handle hardware checksum + */ + if (skb->ip_summed == CHECKSUM_PARTIAL) { + const struct iphdr *ip = ip_hdr(skb); + if (ip->protocol == IPPROTO_TCP) + td_ptr->tdesc1.TCR |= TCR0_TCPCK; + else if (ip->protocol == IPPROTO_UDP) + td_ptr->tdesc1.TCR |= (TCR0_UDPCK); + td_ptr->tdesc1.TCR |= TCR0_IPCK; + } + + prev = index - 1; + if (prev < 0) + prev = vptr->options.numtx - 1; + td_ptr->tdesc0.len |= OWNED_BY_NIC; + vptr->tx.used[qnum]++; + vptr->tx.curr[qnum] = (index + 1) % vptr->options.numtx; + + if (AVAIL_TD(vptr, qnum) < 1) + netif_stop_queue(dev); + + td_ptr = &(vptr->tx.rings[qnum][prev]); + td_ptr->td_buf[0].size |= TD_QUEUE; + mac_tx_queue_wake(vptr->mac_regs, qnum); + + spin_unlock_irqrestore(&vptr->lock, flags); +out: + return NETDEV_TX_OK; +} + +static const struct net_device_ops velocity_netdev_ops = { + .ndo_open = velocity_open, + .ndo_stop = velocity_close, + .ndo_start_xmit = velocity_xmit, + .ndo_get_stats = velocity_get_stats, + .ndo_validate_addr = eth_validate_addr, + .ndo_set_mac_address = eth_mac_addr, + .ndo_set_rx_mode = velocity_set_multi, + .ndo_change_mtu = velocity_change_mtu, + .ndo_eth_ioctl = velocity_ioctl, + .ndo_vlan_rx_add_vid = velocity_vlan_rx_add_vid, + .ndo_vlan_rx_kill_vid = velocity_vlan_rx_kill_vid, +#ifdef CONFIG_NET_POLL_CONTROLLER + .ndo_poll_controller = velocity_poll_controller, +#endif +}; + +/** + * velocity_init_info - init private data + * @vptr: Velocity info + * @info: Board type + * + * Set up the initial velocity_info struct for the device that has been + * discovered. + */ +static void velocity_init_info(struct velocity_info *vptr, + const struct velocity_info_tbl *info) +{ + vptr->chip_id = info->chip_id; + vptr->tx.numq = info->txqueue; + vptr->multicast_limit = MCAM_SIZE; + spin_lock_init(&vptr->lock); +} + +/** + * velocity_get_pci_info - retrieve PCI info for device + * @vptr: velocity device + * + * Retrieve the PCI configuration space data that interests us from + * the kernel PCI layer + */ +static int velocity_get_pci_info(struct velocity_info *vptr) +{ + struct pci_dev *pdev = vptr->pdev; + + pci_set_master(pdev); + + vptr->ioaddr = pci_resource_start(pdev, 0); + vptr->memaddr = pci_resource_start(pdev, 1); + + if (!(pci_resource_flags(pdev, 0) & IORESOURCE_IO)) { + dev_err(&pdev->dev, + "region #0 is not an I/O resource, aborting.\n"); + return -EINVAL; + } + + if ((pci_resource_flags(pdev, 1) & IORESOURCE_IO)) { + dev_err(&pdev->dev, + "region #1 is an I/O resource, aborting.\n"); + return -EINVAL; + } + + if (pci_resource_len(pdev, 1) < VELOCITY_IO_SIZE) { + dev_err(&pdev->dev, "region #1 is too small.\n"); + return -EINVAL; + } + + return 0; +} + +/** + * velocity_get_platform_info - retrieve platform info for device + * @vptr: velocity device + * + * Retrieve the Platform configuration data that interests us + */ +static int velocity_get_platform_info(struct velocity_info *vptr) +{ + struct resource res; + int ret; + + vptr->no_eeprom = of_property_read_bool(vptr->dev->of_node, "no-eeprom"); + + ret = of_address_to_resource(vptr->dev->of_node, 0, &res); + if (ret) { + dev_err(vptr->dev, "unable to find memory address\n"); + return ret; + } + + vptr->memaddr = res.start; + + if (resource_size(&res) < VELOCITY_IO_SIZE) { + dev_err(vptr->dev, "memory region is too small.\n"); + return -EINVAL; + } + + return 0; +} + +/** + * velocity_print_info - per driver data + * @vptr: velocity + * + * Print per driver data as the kernel driver finds Velocity + * hardware + */ +static void velocity_print_info(struct velocity_info *vptr) +{ + netdev_info(vptr->netdev, "%s - Ethernet Address: %pM\n", + get_chip_name(vptr->chip_id), vptr->netdev->dev_addr); +} + +static u32 velocity_get_link(struct net_device *dev) +{ + struct velocity_info *vptr = netdev_priv(dev); + struct mac_regs __iomem *regs = vptr->mac_regs; + return BYTE_REG_BITS_IS_ON(PHYSR0_LINKGD, ®s->PHYSR0) ? 1 : 0; +} + +/** + * velocity_probe - set up discovered velocity device + * @dev: PCI device + * @info: table of match + * @irq: interrupt info + * @bustype: bus that device is connected to + * + * Configure a discovered adapter from scratch. Return a negative + * errno error code on failure paths. + */ +static int velocity_probe(struct device *dev, int irq, + const struct velocity_info_tbl *info, + enum velocity_bus_type bustype) +{ + struct net_device *netdev; + int i; + struct velocity_info *vptr; + struct mac_regs __iomem *regs; + int ret = -ENOMEM; + u8 addr[ETH_ALEN]; + + /* FIXME: this driver, like almost all other ethernet drivers, + * can support more than MAX_UNITS. + */ + if (velocity_nics >= MAX_UNITS) { + dev_notice(dev, "already found %d NICs.\n", velocity_nics); + return -ENODEV; + } + + netdev = alloc_etherdev(sizeof(struct velocity_info)); + if (!netdev) + goto out; + + /* Chain it all together */ + + SET_NETDEV_DEV(netdev, dev); + vptr = netdev_priv(netdev); + + pr_info_once("%s Ver. %s\n", VELOCITY_FULL_DRV_NAM, VELOCITY_VERSION); + pr_info_once("Copyright (c) 2002, 2003 VIA Networking Technologies, Inc.\n"); + pr_info_once("Copyright (c) 2004 Red Hat Inc.\n"); + + netdev->irq = irq; + vptr->netdev = netdev; + vptr->dev = dev; + + velocity_init_info(vptr, info); + + if (bustype == BUS_PCI) { + vptr->pdev = to_pci_dev(dev); + + ret = velocity_get_pci_info(vptr); + if (ret < 0) + goto err_free_dev; + } else { + vptr->pdev = NULL; + ret = velocity_get_platform_info(vptr); + if (ret < 0) + goto err_free_dev; + } + + regs = ioremap(vptr->memaddr, VELOCITY_IO_SIZE); + if (regs == NULL) { + ret = -EIO; + goto err_free_dev; + } + + vptr->mac_regs = regs; + vptr->rev_id = readb(®s->rev_id); + + mac_wol_reset(regs); + + for (i = 0; i < 6; i++) + addr[i] = readb(®s->PAR[i]); + eth_hw_addr_set(netdev, addr); + + + velocity_get_options(&vptr->options, velocity_nics); + + /* + * Mask out the options cannot be set to the chip + */ + + vptr->options.flags &= info->flags; + + /* + * Enable the chip specified capbilities + */ + + vptr->flags = vptr->options.flags | (info->flags & 0xFF000000UL); + + vptr->wol_opts = vptr->options.wol_opts; + vptr->flags |= VELOCITY_FLAGS_WOL_ENABLED; + + vptr->phy_id = MII_GET_PHY_ID(vptr->mac_regs); + + netdev->netdev_ops = &velocity_netdev_ops; + netdev->ethtool_ops = &velocity_ethtool_ops; + netif_napi_add(netdev, &vptr->napi, velocity_poll); + + netdev->hw_features = NETIF_F_IP_CSUM | NETIF_F_SG | + NETIF_F_HW_VLAN_CTAG_TX; + netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | + NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_CTAG_RX | + NETIF_F_IP_CSUM; + + /* MTU range: 64 - 9000 */ + netdev->min_mtu = VELOCITY_MIN_MTU; + netdev->max_mtu = VELOCITY_MAX_MTU; + + ret = register_netdev(netdev); + if (ret < 0) + goto err_iounmap; + + if (!velocity_get_link(netdev)) { + netif_carrier_off(netdev); + vptr->mii_status |= VELOCITY_LINK_FAIL; + } + + velocity_print_info(vptr); + dev_set_drvdata(vptr->dev, netdev); + + /* and leave the chip powered down */ + + velocity_set_power_state(vptr, PCI_D3hot); + velocity_nics++; +out: + return ret; + +err_iounmap: + netif_napi_del(&vptr->napi); + iounmap(regs); +err_free_dev: + free_netdev(netdev); + goto out; +} + +/** + * velocity_remove - device unplug + * @dev: device being removed + * + * Device unload callback. Called on an unplug or on module + * unload for each active device that is present. Disconnects + * the device from the network layer and frees all the resources + */ +static int velocity_remove(struct device *dev) +{ + struct net_device *netdev = dev_get_drvdata(dev); + struct velocity_info *vptr = netdev_priv(netdev); + + unregister_netdev(netdev); + netif_napi_del(&vptr->napi); + iounmap(vptr->mac_regs); + free_netdev(netdev); + velocity_nics--; + + return 0; +} + +static int velocity_pci_probe(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + const struct velocity_info_tbl *info = + &chip_info_table[ent->driver_data]; + int ret; + + ret = pci_enable_device(pdev); + if (ret < 0) + return ret; + + ret = pci_request_regions(pdev, VELOCITY_NAME); + if (ret < 0) { + dev_err(&pdev->dev, "No PCI resources.\n"); + goto fail1; + } + + ret = velocity_probe(&pdev->dev, pdev->irq, info, BUS_PCI); + if (ret == 0) + return 0; + + pci_release_regions(pdev); +fail1: + pci_disable_device(pdev); + return ret; +} + +static void velocity_pci_remove(struct pci_dev *pdev) +{ + velocity_remove(&pdev->dev); + + pci_release_regions(pdev); + pci_disable_device(pdev); +} + +static int velocity_platform_probe(struct platform_device *pdev) +{ + const struct velocity_info_tbl *info; + int irq; + + info = of_device_get_match_data(&pdev->dev); + if (!info) + return -EINVAL; + + irq = irq_of_parse_and_map(pdev->dev.of_node, 0); + if (!irq) + return -EINVAL; + + return velocity_probe(&pdev->dev, irq, info, BUS_PLATFORM); +} + +static int velocity_platform_remove(struct platform_device *pdev) +{ + velocity_remove(&pdev->dev); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +/** + * wol_calc_crc - WOL CRC + * @size: size of the wake mask + * @pattern: data pattern + * @mask_pattern: mask + * + * Compute the wake on lan crc hashes for the packet header + * we are interested in. + */ +static u16 wol_calc_crc(int size, u8 *pattern, u8 *mask_pattern) +{ + u16 crc = 0xFFFF; + u8 mask; + int i, j; + + for (i = 0; i < size; i++) { + mask = mask_pattern[i]; + + /* Skip this loop if the mask equals to zero */ + if (mask == 0x00) + continue; + + for (j = 0; j < 8; j++) { + if ((mask & 0x01) == 0) { + mask >>= 1; + continue; + } + mask >>= 1; + crc = crc_ccitt(crc, &(pattern[i * 8 + j]), 1); + } + } + /* Finally, invert the result once to get the correct data */ + crc = ~crc; + return bitrev32(crc) >> 16; +} + +/** + * velocity_set_wol - set up for wake on lan + * @vptr: velocity to set WOL status on + * + * Set a card up for wake on lan either by unicast or by + * ARP packet. + * + * FIXME: check static buffer is safe here + */ +static int velocity_set_wol(struct velocity_info *vptr) +{ + struct mac_regs __iomem *regs = vptr->mac_regs; + enum speed_opt spd_dpx = vptr->options.spd_dpx; + static u8 buf[256]; + int i; + + static u32 mask_pattern[2][4] = { + {0x00203000, 0x000003C0, 0x00000000, 0x0000000}, /* ARP */ + {0xfffff000, 0xffffffff, 0xffffffff, 0x000ffff} /* Magic Packet */ + }; + + writew(0xFFFF, ®s->WOLCRClr); + writeb(WOLCFG_SAB | WOLCFG_SAM, ®s->WOLCFGSet); + writew(WOLCR_MAGIC_EN, ®s->WOLCRSet); + + /* + if (vptr->wol_opts & VELOCITY_WOL_PHY) + writew((WOLCR_LINKON_EN|WOLCR_LINKOFF_EN), ®s->WOLCRSet); + */ + + if (vptr->wol_opts & VELOCITY_WOL_UCAST) + writew(WOLCR_UNICAST_EN, ®s->WOLCRSet); + + if (vptr->wol_opts & VELOCITY_WOL_ARP) { + struct arp_packet *arp = (struct arp_packet *) buf; + u16 crc; + memset(buf, 0, sizeof(struct arp_packet) + 7); + + for (i = 0; i < 4; i++) + writel(mask_pattern[0][i], ®s->ByteMask[0][i]); + + arp->type = htons(ETH_P_ARP); + arp->ar_op = htons(1); + + memcpy(arp->ar_tip, vptr->ip_addr, 4); + + crc = wol_calc_crc((sizeof(struct arp_packet) + 7) / 8, buf, + (u8 *) & mask_pattern[0][0]); + + writew(crc, ®s->PatternCRC[0]); + writew(WOLCR_ARP_EN, ®s->WOLCRSet); + } + + BYTE_REG_BITS_ON(PWCFG_WOLTYPE, ®s->PWCFGSet); + BYTE_REG_BITS_ON(PWCFG_LEGACY_WOLEN, ®s->PWCFGSet); + + writew(0x0FFF, ®s->WOLSRClr); + + if (spd_dpx == SPD_DPX_1000_FULL) + goto mac_done; + + if (spd_dpx != SPD_DPX_AUTO) + goto advertise_done; + + if (vptr->mii_status & VELOCITY_AUTONEG_ENABLE) { + if (PHYID_GET_PHY_ID(vptr->phy_id) == PHYID_CICADA_CS8201) + MII_REG_BITS_ON(AUXCR_MDPPS, MII_NCONFIG, vptr->mac_regs); + + MII_REG_BITS_OFF(ADVERTISE_1000FULL | ADVERTISE_1000HALF, MII_CTRL1000, vptr->mac_regs); + } + + if (vptr->mii_status & VELOCITY_SPEED_1000) + MII_REG_BITS_ON(BMCR_ANRESTART, MII_BMCR, vptr->mac_regs); + +advertise_done: + BYTE_REG_BITS_ON(CHIPGCR_FCMODE, ®s->CHIPGCR); + + { + u8 GCR; + GCR = readb(®s->CHIPGCR); + GCR = (GCR & ~CHIPGCR_FCGMII) | CHIPGCR_FCFDX; + writeb(GCR, ®s->CHIPGCR); + } + +mac_done: + BYTE_REG_BITS_OFF(ISR_PWEI, ®s->ISR); + /* Turn on SWPTAG just before entering power mode */ + BYTE_REG_BITS_ON(STICKHW_SWPTAG, ®s->STICKHW); + /* Go to bed ..... */ + BYTE_REG_BITS_ON((STICKHW_DS1 | STICKHW_DS0), ®s->STICKHW); + + return 0; +} + +/** + * velocity_save_context - save registers + * @vptr: velocity + * @context: buffer for stored context + * + * Retrieve the current configuration from the velocity hardware + * and stash it in the context structure, for use by the context + * restore functions. This allows us to save things we need across + * power down states + */ +static void velocity_save_context(struct velocity_info *vptr, struct velocity_context *context) +{ + struct mac_regs __iomem *regs = vptr->mac_regs; + u16 i; + u8 __iomem *ptr = (u8 __iomem *)regs; + + for (i = MAC_REG_PAR; i < MAC_REG_CR0_CLR; i += 4) + *((u32 *) (context->mac_reg + i)) = readl(ptr + i); + + for (i = MAC_REG_MAR; i < MAC_REG_TDCSR_CLR; i += 4) + *((u32 *) (context->mac_reg + i)) = readl(ptr + i); + + for (i = MAC_REG_RDBASE_LO; i < MAC_REG_FIFO_TEST0; i += 4) + *((u32 *) (context->mac_reg + i)) = readl(ptr + i); + +} + +static int velocity_suspend(struct device *dev) +{ + struct net_device *netdev = dev_get_drvdata(dev); + struct velocity_info *vptr = netdev_priv(netdev); + unsigned long flags; + + if (!netif_running(vptr->netdev)) + return 0; + + netif_device_detach(vptr->netdev); + + spin_lock_irqsave(&vptr->lock, flags); + if (vptr->pdev) + pci_save_state(vptr->pdev); + + if (vptr->flags & VELOCITY_FLAGS_WOL_ENABLED) { + velocity_get_ip(vptr); + velocity_save_context(vptr, &vptr->context); + velocity_shutdown(vptr); + velocity_set_wol(vptr); + if (vptr->pdev) + pci_enable_wake(vptr->pdev, PCI_D3hot, 1); + velocity_set_power_state(vptr, PCI_D3hot); + } else { + velocity_save_context(vptr, &vptr->context); + velocity_shutdown(vptr); + if (vptr->pdev) + pci_disable_device(vptr->pdev); + velocity_set_power_state(vptr, PCI_D3hot); + } + + spin_unlock_irqrestore(&vptr->lock, flags); + return 0; +} + +/** + * velocity_restore_context - restore registers + * @vptr: velocity + * @context: buffer for stored context + * + * Reload the register configuration from the velocity context + * created by velocity_save_context. + */ +static void velocity_restore_context(struct velocity_info *vptr, struct velocity_context *context) +{ + struct mac_regs __iomem *regs = vptr->mac_regs; + int i; + u8 __iomem *ptr = (u8 __iomem *)regs; + + for (i = MAC_REG_PAR; i < MAC_REG_CR0_SET; i += 4) + writel(*((u32 *) (context->mac_reg + i)), ptr + i); + + /* Just skip cr0 */ + for (i = MAC_REG_CR1_SET; i < MAC_REG_CR0_CLR; i++) { + /* Clear */ + writeb(~(*((u8 *) (context->mac_reg + i))), ptr + i + 4); + /* Set */ + writeb(*((u8 *) (context->mac_reg + i)), ptr + i); + } + + for (i = MAC_REG_MAR; i < MAC_REG_IMR; i += 4) + writel(*((u32 *) (context->mac_reg + i)), ptr + i); + + for (i = MAC_REG_RDBASE_LO; i < MAC_REG_FIFO_TEST0; i += 4) + writel(*((u32 *) (context->mac_reg + i)), ptr + i); + + for (i = MAC_REG_TDCSR_SET; i <= MAC_REG_RDCSR_SET; i++) + writeb(*((u8 *) (context->mac_reg + i)), ptr + i); +} + +static int velocity_resume(struct device *dev) +{ + struct net_device *netdev = dev_get_drvdata(dev); + struct velocity_info *vptr = netdev_priv(netdev); + unsigned long flags; + int i; + + if (!netif_running(vptr->netdev)) + return 0; + + velocity_set_power_state(vptr, PCI_D0); + + if (vptr->pdev) { + pci_enable_wake(vptr->pdev, PCI_D0, 0); + pci_restore_state(vptr->pdev); + } + + mac_wol_reset(vptr->mac_regs); + + spin_lock_irqsave(&vptr->lock, flags); + velocity_restore_context(vptr, &vptr->context); + velocity_init_registers(vptr, VELOCITY_INIT_WOL); + mac_disable_int(vptr->mac_regs); + + velocity_tx_srv(vptr); + + for (i = 0; i < vptr->tx.numq; i++) { + if (vptr->tx.used[i]) + mac_tx_queue_wake(vptr->mac_regs, i); + } + + mac_enable_int(vptr->mac_regs); + spin_unlock_irqrestore(&vptr->lock, flags); + netif_device_attach(vptr->netdev); + + return 0; +} +#endif /* CONFIG_PM_SLEEP */ + +static SIMPLE_DEV_PM_OPS(velocity_pm_ops, velocity_suspend, velocity_resume); + +/* + * Definition for our device driver. The PCI layer interface + * uses this to handle all our card discover and plugging + */ +static struct pci_driver velocity_pci_driver = { + .name = VELOCITY_NAME, + .id_table = velocity_pci_id_table, + .probe = velocity_pci_probe, + .remove = velocity_pci_remove, + .driver = { + .pm = &velocity_pm_ops, + }, +}; + +static struct platform_driver velocity_platform_driver = { + .probe = velocity_platform_probe, + .remove = velocity_platform_remove, + .driver = { + .name = "via-velocity", + .of_match_table = velocity_of_ids, + .pm = &velocity_pm_ops, + }, +}; + +/** + * velocity_ethtool_up - pre hook for ethtool + * @dev: network device + * + * Called before an ethtool operation. We need to make sure the + * chip is out of D3 state before we poke at it. In case of ethtool + * ops nesting, only wake the device up in the outermost block. + */ +static int velocity_ethtool_up(struct net_device *dev) +{ + struct velocity_info *vptr = netdev_priv(dev); + + if (vptr->ethtool_ops_nesting == U32_MAX) + return -EBUSY; + if (!vptr->ethtool_ops_nesting++ && !netif_running(dev)) + velocity_set_power_state(vptr, PCI_D0); + return 0; +} + +/** + * velocity_ethtool_down - post hook for ethtool + * @dev: network device + * + * Called after an ethtool operation. Restore the chip back to D3 + * state if it isn't running. In case of ethtool ops nesting, only + * put the device to sleep in the outermost block. + */ +static void velocity_ethtool_down(struct net_device *dev) +{ + struct velocity_info *vptr = netdev_priv(dev); + + if (!--vptr->ethtool_ops_nesting && !netif_running(dev)) + velocity_set_power_state(vptr, PCI_D3hot); +} + +static int velocity_get_link_ksettings(struct net_device *dev, + struct ethtool_link_ksettings *cmd) +{ + struct velocity_info *vptr = netdev_priv(dev); + struct mac_regs __iomem *regs = vptr->mac_regs; + u32 status; + u32 supported, advertising; + + status = check_connection_type(vptr->mac_regs); + + supported = SUPPORTED_TP | + SUPPORTED_Autoneg | + SUPPORTED_10baseT_Half | + SUPPORTED_10baseT_Full | + SUPPORTED_100baseT_Half | + SUPPORTED_100baseT_Full | + SUPPORTED_1000baseT_Half | + SUPPORTED_1000baseT_Full; + + advertising = ADVERTISED_TP | ADVERTISED_Autoneg; + if (vptr->options.spd_dpx == SPD_DPX_AUTO) { + advertising |= + ADVERTISED_10baseT_Half | + ADVERTISED_10baseT_Full | + ADVERTISED_100baseT_Half | + ADVERTISED_100baseT_Full | + ADVERTISED_1000baseT_Half | + ADVERTISED_1000baseT_Full; + } else { + switch (vptr->options.spd_dpx) { + case SPD_DPX_1000_FULL: + advertising |= ADVERTISED_1000baseT_Full; + break; + case SPD_DPX_100_HALF: + advertising |= ADVERTISED_100baseT_Half; + break; + case SPD_DPX_100_FULL: + advertising |= ADVERTISED_100baseT_Full; + break; + case SPD_DPX_10_HALF: + advertising |= ADVERTISED_10baseT_Half; + break; + case SPD_DPX_10_FULL: + advertising |= ADVERTISED_10baseT_Full; + break; + default: + break; + } + } + + if (status & VELOCITY_SPEED_1000) + cmd->base.speed = SPEED_1000; + else if (status & VELOCITY_SPEED_100) + cmd->base.speed = SPEED_100; + else + cmd->base.speed = SPEED_10; + + cmd->base.autoneg = (status & VELOCITY_AUTONEG_ENABLE) ? + AUTONEG_ENABLE : AUTONEG_DISABLE; + cmd->base.port = PORT_TP; + cmd->base.phy_address = readb(®s->MIIADR) & 0x1F; + + if (status & VELOCITY_DUPLEX_FULL) + cmd->base.duplex = DUPLEX_FULL; + else + cmd->base.duplex = DUPLEX_HALF; + + ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, + supported); + ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, + advertising); + + return 0; +} + +static int velocity_set_link_ksettings(struct net_device *dev, + const struct ethtool_link_ksettings *cmd) +{ + struct velocity_info *vptr = netdev_priv(dev); + u32 speed = cmd->base.speed; + u32 curr_status; + u32 new_status = 0; + int ret = 0; + + curr_status = check_connection_type(vptr->mac_regs); + curr_status &= (~VELOCITY_LINK_FAIL); + + new_status |= ((cmd->base.autoneg) ? VELOCITY_AUTONEG_ENABLE : 0); + new_status |= ((speed == SPEED_1000) ? VELOCITY_SPEED_1000 : 0); + new_status |= ((speed == SPEED_100) ? VELOCITY_SPEED_100 : 0); + new_status |= ((speed == SPEED_10) ? VELOCITY_SPEED_10 : 0); + new_status |= ((cmd->base.duplex == DUPLEX_FULL) ? + VELOCITY_DUPLEX_FULL : 0); + + if ((new_status & VELOCITY_AUTONEG_ENABLE) && + (new_status != (curr_status | VELOCITY_AUTONEG_ENABLE))) { + ret = -EINVAL; + } else { + enum speed_opt spd_dpx; + + if (new_status & VELOCITY_AUTONEG_ENABLE) + spd_dpx = SPD_DPX_AUTO; + else if ((new_status & VELOCITY_SPEED_1000) && + (new_status & VELOCITY_DUPLEX_FULL)) { + spd_dpx = SPD_DPX_1000_FULL; + } else if (new_status & VELOCITY_SPEED_100) + spd_dpx = (new_status & VELOCITY_DUPLEX_FULL) ? + SPD_DPX_100_FULL : SPD_DPX_100_HALF; + else if (new_status & VELOCITY_SPEED_10) + spd_dpx = (new_status & VELOCITY_DUPLEX_FULL) ? + SPD_DPX_10_FULL : SPD_DPX_10_HALF; + else + return -EOPNOTSUPP; + + vptr->options.spd_dpx = spd_dpx; + + velocity_set_media_mode(vptr, new_status); + } + + return ret; +} + +static void velocity_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) +{ + struct velocity_info *vptr = netdev_priv(dev); + + strscpy(info->driver, VELOCITY_NAME, sizeof(info->driver)); + strscpy(info->version, VELOCITY_VERSION, sizeof(info->version)); + if (vptr->pdev) + strscpy(info->bus_info, pci_name(vptr->pdev), + sizeof(info->bus_info)); + else + strscpy(info->bus_info, "platform", sizeof(info->bus_info)); +} + +static void velocity_ethtool_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol) +{ + struct velocity_info *vptr = netdev_priv(dev); + wol->supported = WAKE_PHY | WAKE_MAGIC | WAKE_UCAST | WAKE_ARP; + wol->wolopts |= WAKE_MAGIC; + /* + if (vptr->wol_opts & VELOCITY_WOL_PHY) + wol.wolopts|=WAKE_PHY; + */ + if (vptr->wol_opts & VELOCITY_WOL_UCAST) + wol->wolopts |= WAKE_UCAST; + if (vptr->wol_opts & VELOCITY_WOL_ARP) + wol->wolopts |= WAKE_ARP; + memcpy(&wol->sopass, vptr->wol_passwd, 6); +} + +static int velocity_ethtool_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol) +{ + struct velocity_info *vptr = netdev_priv(dev); + + if (!(wol->wolopts & (WAKE_PHY | WAKE_MAGIC | WAKE_UCAST | WAKE_ARP))) + return -EFAULT; + vptr->wol_opts = VELOCITY_WOL_MAGIC; + + /* + if (wol.wolopts & WAKE_PHY) { + vptr->wol_opts|=VELOCITY_WOL_PHY; + vptr->flags |=VELOCITY_FLAGS_WOL_ENABLED; + } + */ + + if (wol->wolopts & WAKE_MAGIC) { + vptr->wol_opts |= VELOCITY_WOL_MAGIC; + vptr->flags |= VELOCITY_FLAGS_WOL_ENABLED; + } + if (wol->wolopts & WAKE_UCAST) { + vptr->wol_opts |= VELOCITY_WOL_UCAST; + vptr->flags |= VELOCITY_FLAGS_WOL_ENABLED; + } + if (wol->wolopts & WAKE_ARP) { + vptr->wol_opts |= VELOCITY_WOL_ARP; + vptr->flags |= VELOCITY_FLAGS_WOL_ENABLED; + } + memcpy(vptr->wol_passwd, wol->sopass, 6); + return 0; +} + +static int get_pending_timer_val(int val) +{ + int mult_bits = val >> 6; + int mult = 1; + + switch (mult_bits) + { + case 1: + mult = 4; break; + case 2: + mult = 16; break; + case 3: + mult = 64; break; + case 0: + default: + break; + } + + return (val & 0x3f) * mult; +} + +static void set_pending_timer_val(int *val, u32 us) +{ + u8 mult = 0; + u8 shift = 0; + + if (us >= 0x3f) { + mult = 1; /* mult with 4 */ + shift = 2; + } + if (us >= 0x3f * 4) { + mult = 2; /* mult with 16 */ + shift = 4; + } + if (us >= 0x3f * 16) { + mult = 3; /* mult with 64 */ + shift = 6; + } + + *val = (mult << 6) | ((us >> shift) & 0x3f); +} + + +static int velocity_get_coalesce(struct net_device *dev, + struct ethtool_coalesce *ecmd, + struct kernel_ethtool_coalesce *kernel_coal, + struct netlink_ext_ack *extack) +{ + struct velocity_info *vptr = netdev_priv(dev); + + ecmd->tx_max_coalesced_frames = vptr->options.tx_intsup; + ecmd->rx_max_coalesced_frames = vptr->options.rx_intsup; + + ecmd->rx_coalesce_usecs = get_pending_timer_val(vptr->options.rxqueue_timer); + ecmd->tx_coalesce_usecs = get_pending_timer_val(vptr->options.txqueue_timer); + + return 0; +} + +static int velocity_set_coalesce(struct net_device *dev, + struct ethtool_coalesce *ecmd, + struct kernel_ethtool_coalesce *kernel_coal, + struct netlink_ext_ack *extack) +{ + struct velocity_info *vptr = netdev_priv(dev); + int max_us = 0x3f * 64; + unsigned long flags; + + /* 6 bits of */ + if (ecmd->tx_coalesce_usecs > max_us) + return -EINVAL; + if (ecmd->rx_coalesce_usecs > max_us) + return -EINVAL; + + if (ecmd->tx_max_coalesced_frames > 0xff) + return -EINVAL; + if (ecmd->rx_max_coalesced_frames > 0xff) + return -EINVAL; + + vptr->options.rx_intsup = ecmd->rx_max_coalesced_frames; + vptr->options.tx_intsup = ecmd->tx_max_coalesced_frames; + + set_pending_timer_val(&vptr->options.rxqueue_timer, + ecmd->rx_coalesce_usecs); + set_pending_timer_val(&vptr->options.txqueue_timer, + ecmd->tx_coalesce_usecs); + + /* Setup the interrupt suppression and queue timers */ + spin_lock_irqsave(&vptr->lock, flags); + mac_disable_int(vptr->mac_regs); + setup_adaptive_interrupts(vptr); + setup_queue_timers(vptr); + + mac_write_int_mask(vptr->int_mask, vptr->mac_regs); + mac_clear_isr(vptr->mac_regs); + mac_enable_int(vptr->mac_regs); + spin_unlock_irqrestore(&vptr->lock, flags); + + return 0; +} + +static const char velocity_gstrings[][ETH_GSTRING_LEN] = { + "rx_all", + "rx_ok", + "tx_ok", + "rx_error", + "rx_runt_ok", + "rx_runt_err", + "rx_64", + "tx_64", + "rx_65_to_127", + "tx_65_to_127", + "rx_128_to_255", + "tx_128_to_255", + "rx_256_to_511", + "tx_256_to_511", + "rx_512_to_1023", + "tx_512_to_1023", + "rx_1024_to_1518", + "tx_1024_to_1518", + "tx_ether_collisions", + "rx_crc_errors", + "rx_jumbo", + "tx_jumbo", + "rx_mac_control_frames", + "tx_mac_control_frames", + "rx_frame_alignment_errors", + "rx_long_ok", + "rx_long_err", + "tx_sqe_errors", + "rx_no_buf", + "rx_symbol_errors", + "in_range_length_errors", + "late_collisions" +}; + +static void velocity_get_strings(struct net_device *dev, u32 sset, u8 *data) +{ + switch (sset) { + case ETH_SS_STATS: + memcpy(data, *velocity_gstrings, sizeof(velocity_gstrings)); + break; + } +} + +static int velocity_get_sset_count(struct net_device *dev, int sset) +{ + switch (sset) { + case ETH_SS_STATS: + return ARRAY_SIZE(velocity_gstrings); + default: + return -EOPNOTSUPP; + } +} + +static void velocity_get_ethtool_stats(struct net_device *dev, + struct ethtool_stats *stats, u64 *data) +{ + if (netif_running(dev)) { + struct velocity_info *vptr = netdev_priv(dev); + u32 *p = vptr->mib_counter; + int i; + + spin_lock_irq(&vptr->lock); + velocity_update_hw_mibs(vptr); + spin_unlock_irq(&vptr->lock); + + for (i = 0; i < ARRAY_SIZE(velocity_gstrings); i++) + *data++ = *p++; + } +} + +static const struct ethtool_ops velocity_ethtool_ops = { + .supported_coalesce_params = ETHTOOL_COALESCE_USECS | + ETHTOOL_COALESCE_MAX_FRAMES, + .get_drvinfo = velocity_get_drvinfo, + .get_wol = velocity_ethtool_get_wol, + .set_wol = velocity_ethtool_set_wol, + .get_link = velocity_get_link, + .get_strings = velocity_get_strings, + .get_sset_count = velocity_get_sset_count, + .get_ethtool_stats = velocity_get_ethtool_stats, + .get_coalesce = velocity_get_coalesce, + .set_coalesce = velocity_set_coalesce, + .begin = velocity_ethtool_up, + .complete = velocity_ethtool_down, + .get_link_ksettings = velocity_get_link_ksettings, + .set_link_ksettings = velocity_set_link_ksettings, +}; + +#if defined(CONFIG_PM) && defined(CONFIG_INET) +static int velocity_netdev_event(struct notifier_block *nb, unsigned long notification, void *ptr) +{ + struct in_ifaddr *ifa = ptr; + struct net_device *dev = ifa->ifa_dev->dev; + + if (dev_net(dev) == &init_net && + dev->netdev_ops == &velocity_netdev_ops) + velocity_get_ip(netdev_priv(dev)); + + return NOTIFY_DONE; +} + +static struct notifier_block velocity_inetaddr_notifier = { + .notifier_call = velocity_netdev_event, +}; + +static void velocity_register_notifier(void) +{ + register_inetaddr_notifier(&velocity_inetaddr_notifier); +} + +static void velocity_unregister_notifier(void) +{ + unregister_inetaddr_notifier(&velocity_inetaddr_notifier); +} + +#else + +#define velocity_register_notifier() do {} while (0) +#define velocity_unregister_notifier() do {} while (0) + +#endif /* defined(CONFIG_PM) && defined(CONFIG_INET) */ + +/** + * velocity_init_module - load time function + * + * Called when the velocity module is loaded. The PCI driver + * is registered with the PCI layer, and in turn will call + * the probe functions for each velocity adapter installed + * in the system. + */ +static int __init velocity_init_module(void) +{ + int ret_pci, ret_platform; + + velocity_register_notifier(); + + ret_pci = pci_register_driver(&velocity_pci_driver); + ret_platform = platform_driver_register(&velocity_platform_driver); + + /* if both_registers failed, remove the notifier */ + if ((ret_pci < 0) && (ret_platform < 0)) { + velocity_unregister_notifier(); + return ret_pci; + } + + return 0; +} + +/** + * velocity_cleanup_module - module unload + * + * When the velocity hardware is unloaded this function is called. + * It will clean up the notifiers and the unregister the PCI + * driver interface for this hardware. This in turn cleans up + * all discovered interfaces before returning from the function + */ +static void __exit velocity_cleanup_module(void) +{ + velocity_unregister_notifier(); + + pci_unregister_driver(&velocity_pci_driver); + platform_driver_unregister(&velocity_platform_driver); +} + +module_init(velocity_init_module); +module_exit(velocity_cleanup_module); |