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linux/drivers/net/sungem.c
David Howells 7d12e780e0 IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:10:12 +01:00

3207 lines
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/* $Id: sungem.c,v 1.44.2.22 2002/03/13 01:18:12 davem Exp $
* sungem.c: Sun GEM ethernet driver.
*
* Copyright (C) 2000, 2001, 2002, 2003 David S. Miller (davem@redhat.com)
*
* Support for Apple GMAC and assorted PHYs, WOL, Power Management
* (C) 2001,2002,2003 Benjamin Herrenscmidt (benh@kernel.crashing.org)
* (C) 2004,2005 Benjamin Herrenscmidt, IBM Corp.
*
* NAPI and NETPOLL support
* (C) 2004 by Eric Lemoine (eric.lemoine@gmail.com)
*
* TODO:
* - Now that the driver was significantly simplified, I need to rework
* the locking. I'm sure we don't need _2_ spinlocks, and we probably
* can avoid taking most of them for so long period of time (and schedule
* instead). The main issues at this point are caused by the netdev layer
* though:
*
* gem_change_mtu() and gem_set_multicast() are called with a read_lock()
* help by net/core/dev.c, thus they can't schedule. That means they can't
* call netif_poll_disable() neither, thus force gem_poll() to keep a spinlock
* where it could have been dropped. change_mtu especially would love also to
* be able to msleep instead of horrid locked delays when resetting the HW,
* but that read_lock() makes it impossible, unless I defer it's action to
* the reset task, which means it'll be asynchronous (won't take effect until
* the system schedules a bit).
*
* Also, it would probably be possible to also remove most of the long-life
* locking in open/resume code path (gem_reinit_chip) by beeing more careful
* about when we can start taking interrupts or get xmit() called...
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/in.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/crc32.h>
#include <linux/random.h>
#include <linux/workqueue.h>
#include <linux/if_vlan.h>
#include <linux/bitops.h>
#include <linux/mutex.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/byteorder.h>
#include <asm/uaccess.h>
#include <asm/irq.h>
#ifdef __sparc__
#include <asm/idprom.h>
#include <asm/openprom.h>
#include <asm/oplib.h>
#include <asm/pbm.h>
#endif
#ifdef CONFIG_PPC_PMAC
#include <asm/pci-bridge.h>
#include <asm/prom.h>
#include <asm/machdep.h>
#include <asm/pmac_feature.h>
#endif
#include "sungem_phy.h"
#include "sungem.h"
/* Stripping FCS is causing problems, disabled for now */
#undef STRIP_FCS
#define DEFAULT_MSG (NETIF_MSG_DRV | \
NETIF_MSG_PROBE | \
NETIF_MSG_LINK)
#define ADVERTISE_MASK (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | \
SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full | \
SUPPORTED_1000baseT_Half | SUPPORTED_1000baseT_Full)
#define DRV_NAME "sungem"
#define DRV_VERSION "0.98"
#define DRV_RELDATE "8/24/03"
#define DRV_AUTHOR "David S. Miller (davem@redhat.com)"
static char version[] __devinitdata =
DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n";
MODULE_AUTHOR(DRV_AUTHOR);
MODULE_DESCRIPTION("Sun GEM Gbit ethernet driver");
MODULE_LICENSE("GPL");
#define GEM_MODULE_NAME "gem"
#define PFX GEM_MODULE_NAME ": "
static struct pci_device_id gem_pci_tbl[] = {
{ PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_GEM,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
/* These models only differ from the original GEM in
* that their tx/rx fifos are of a different size and
* they only support 10/100 speeds. -DaveM
*
* Apple's GMAC does support gigabit on machines with
* the BCM54xx PHYs. -BenH
*/
{ PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_RIO_GEM,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
{ PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_UNI_N_GMAC,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
{ PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_UNI_N_GMACP,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
{ PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_UNI_N_GMAC2,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
{ PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_K2_GMAC,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
{ PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_SH_SUNGEM,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
{ PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_IPID2_GMAC,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
{0, }
};
MODULE_DEVICE_TABLE(pci, gem_pci_tbl);
static u16 __phy_read(struct gem *gp, int phy_addr, int reg)
{
u32 cmd;
int limit = 10000;
cmd = (1 << 30);
cmd |= (2 << 28);
cmd |= (phy_addr << 23) & MIF_FRAME_PHYAD;
cmd |= (reg << 18) & MIF_FRAME_REGAD;
cmd |= (MIF_FRAME_TAMSB);
writel(cmd, gp->regs + MIF_FRAME);
while (limit--) {
cmd = readl(gp->regs + MIF_FRAME);
if (cmd & MIF_FRAME_TALSB)
break;
udelay(10);
}
if (!limit)
cmd = 0xffff;
return cmd & MIF_FRAME_DATA;
}
static inline int _phy_read(struct net_device *dev, int mii_id, int reg)
{
struct gem *gp = dev->priv;
return __phy_read(gp, mii_id, reg);
}
static inline u16 phy_read(struct gem *gp, int reg)
{
return __phy_read(gp, gp->mii_phy_addr, reg);
}
static void __phy_write(struct gem *gp, int phy_addr, int reg, u16 val)
{
u32 cmd;
int limit = 10000;
cmd = (1 << 30);
cmd |= (1 << 28);
cmd |= (phy_addr << 23) & MIF_FRAME_PHYAD;
cmd |= (reg << 18) & MIF_FRAME_REGAD;
cmd |= (MIF_FRAME_TAMSB);
cmd |= (val & MIF_FRAME_DATA);
writel(cmd, gp->regs + MIF_FRAME);
while (limit--) {
cmd = readl(gp->regs + MIF_FRAME);
if (cmd & MIF_FRAME_TALSB)
break;
udelay(10);
}
}
static inline void _phy_write(struct net_device *dev, int mii_id, int reg, int val)
{
struct gem *gp = dev->priv;
__phy_write(gp, mii_id, reg, val & 0xffff);
}
static inline void phy_write(struct gem *gp, int reg, u16 val)
{
__phy_write(gp, gp->mii_phy_addr, reg, val);
}
static inline void gem_enable_ints(struct gem *gp)
{
/* Enable all interrupts but TXDONE */
writel(GREG_STAT_TXDONE, gp->regs + GREG_IMASK);
}
static inline void gem_disable_ints(struct gem *gp)
{
/* Disable all interrupts, including TXDONE */
writel(GREG_STAT_NAPI | GREG_STAT_TXDONE, gp->regs + GREG_IMASK);
}
static void gem_get_cell(struct gem *gp)
{
BUG_ON(gp->cell_enabled < 0);
gp->cell_enabled++;
#ifdef CONFIG_PPC_PMAC
if (gp->cell_enabled == 1) {
mb();
pmac_call_feature(PMAC_FTR_GMAC_ENABLE, gp->of_node, 0, 1);
udelay(10);
}
#endif /* CONFIG_PPC_PMAC */
}
/* Turn off the chip's clock */
static void gem_put_cell(struct gem *gp)
{
BUG_ON(gp->cell_enabled <= 0);
gp->cell_enabled--;
#ifdef CONFIG_PPC_PMAC
if (gp->cell_enabled == 0) {
mb();
pmac_call_feature(PMAC_FTR_GMAC_ENABLE, gp->of_node, 0, 0);
udelay(10);
}
#endif /* CONFIG_PPC_PMAC */
}
static void gem_handle_mif_event(struct gem *gp, u32 reg_val, u32 changed_bits)
{
if (netif_msg_intr(gp))
printk(KERN_DEBUG "%s: mif interrupt\n", gp->dev->name);
}
static int gem_pcs_interrupt(struct net_device *dev, struct gem *gp, u32 gem_status)
{
u32 pcs_istat = readl(gp->regs + PCS_ISTAT);
u32 pcs_miistat;
if (netif_msg_intr(gp))
printk(KERN_DEBUG "%s: pcs interrupt, pcs_istat: 0x%x\n",
gp->dev->name, pcs_istat);
if (!(pcs_istat & PCS_ISTAT_LSC)) {
printk(KERN_ERR "%s: PCS irq but no link status change???\n",
dev->name);
return 0;
}
/* The link status bit latches on zero, so you must
* read it twice in such a case to see a transition
* to the link being up.
*/
pcs_miistat = readl(gp->regs + PCS_MIISTAT);
if (!(pcs_miistat & PCS_MIISTAT_LS))
pcs_miistat |=
(readl(gp->regs + PCS_MIISTAT) &
PCS_MIISTAT_LS);
if (pcs_miistat & PCS_MIISTAT_ANC) {
/* The remote-fault indication is only valid
* when autoneg has completed.
*/
if (pcs_miistat & PCS_MIISTAT_RF)
printk(KERN_INFO "%s: PCS AutoNEG complete, "
"RemoteFault\n", dev->name);
else
printk(KERN_INFO "%s: PCS AutoNEG complete.\n",
dev->name);
}
if (pcs_miistat & PCS_MIISTAT_LS) {
printk(KERN_INFO "%s: PCS link is now up.\n",
dev->name);
netif_carrier_on(gp->dev);
} else {
printk(KERN_INFO "%s: PCS link is now down.\n",
dev->name);
netif_carrier_off(gp->dev);
/* If this happens and the link timer is not running,
* reset so we re-negotiate.
*/
if (!timer_pending(&gp->link_timer))
return 1;
}
return 0;
}
static int gem_txmac_interrupt(struct net_device *dev, struct gem *gp, u32 gem_status)
{
u32 txmac_stat = readl(gp->regs + MAC_TXSTAT);
if (netif_msg_intr(gp))
printk(KERN_DEBUG "%s: txmac interrupt, txmac_stat: 0x%x\n",
gp->dev->name, txmac_stat);
/* Defer timer expiration is quite normal,
* don't even log the event.
*/
if ((txmac_stat & MAC_TXSTAT_DTE) &&
!(txmac_stat & ~MAC_TXSTAT_DTE))
return 0;
if (txmac_stat & MAC_TXSTAT_URUN) {
printk(KERN_ERR "%s: TX MAC xmit underrun.\n",
dev->name);
gp->net_stats.tx_fifo_errors++;
}
if (txmac_stat & MAC_TXSTAT_MPE) {
printk(KERN_ERR "%s: TX MAC max packet size error.\n",
dev->name);
gp->net_stats.tx_errors++;
}
/* The rest are all cases of one of the 16-bit TX
* counters expiring.
*/
if (txmac_stat & MAC_TXSTAT_NCE)
gp->net_stats.collisions += 0x10000;
if (txmac_stat & MAC_TXSTAT_ECE) {
gp->net_stats.tx_aborted_errors += 0x10000;
gp->net_stats.collisions += 0x10000;
}
if (txmac_stat & MAC_TXSTAT_LCE) {
gp->net_stats.tx_aborted_errors += 0x10000;
gp->net_stats.collisions += 0x10000;
}
/* We do not keep track of MAC_TXSTAT_FCE and
* MAC_TXSTAT_PCE events.
*/
return 0;
}
/* When we get a RX fifo overflow, the RX unit in GEM is probably hung
* so we do the following.
*
* If any part of the reset goes wrong, we return 1 and that causes the
* whole chip to be reset.
*/
static int gem_rxmac_reset(struct gem *gp)
{
struct net_device *dev = gp->dev;
int limit, i;
u64 desc_dma;
u32 val;
/* First, reset & disable MAC RX. */
writel(MAC_RXRST_CMD, gp->regs + MAC_RXRST);
for (limit = 0; limit < 5000; limit++) {
if (!(readl(gp->regs + MAC_RXRST) & MAC_RXRST_CMD))
break;
udelay(10);
}
if (limit == 5000) {
printk(KERN_ERR "%s: RX MAC will not reset, resetting whole "
"chip.\n", dev->name);
return 1;
}
writel(gp->mac_rx_cfg & ~MAC_RXCFG_ENAB,
gp->regs + MAC_RXCFG);
for (limit = 0; limit < 5000; limit++) {
if (!(readl(gp->regs + MAC_RXCFG) & MAC_RXCFG_ENAB))
break;
udelay(10);
}
if (limit == 5000) {
printk(KERN_ERR "%s: RX MAC will not disable, resetting whole "
"chip.\n", dev->name);
return 1;
}
/* Second, disable RX DMA. */
writel(0, gp->regs + RXDMA_CFG);
for (limit = 0; limit < 5000; limit++) {
if (!(readl(gp->regs + RXDMA_CFG) & RXDMA_CFG_ENABLE))
break;
udelay(10);
}
if (limit == 5000) {
printk(KERN_ERR "%s: RX DMA will not disable, resetting whole "
"chip.\n", dev->name);
return 1;
}
udelay(5000);
/* Execute RX reset command. */
writel(gp->swrst_base | GREG_SWRST_RXRST,
gp->regs + GREG_SWRST);
for (limit = 0; limit < 5000; limit++) {
if (!(readl(gp->regs + GREG_SWRST) & GREG_SWRST_RXRST))
break;
udelay(10);
}
if (limit == 5000) {
printk(KERN_ERR "%s: RX reset command will not execute, resetting "
"whole chip.\n", dev->name);
return 1;
}
/* Refresh the RX ring. */
for (i = 0; i < RX_RING_SIZE; i++) {
struct gem_rxd *rxd = &gp->init_block->rxd[i];
if (gp->rx_skbs[i] == NULL) {
printk(KERN_ERR "%s: Parts of RX ring empty, resetting "
"whole chip.\n", dev->name);
return 1;
}
rxd->status_word = cpu_to_le64(RXDCTRL_FRESH(gp));
}
gp->rx_new = gp->rx_old = 0;
/* Now we must reprogram the rest of RX unit. */
desc_dma = (u64) gp->gblock_dvma;
desc_dma += (INIT_BLOCK_TX_RING_SIZE * sizeof(struct gem_txd));
writel(desc_dma >> 32, gp->regs + RXDMA_DBHI);
writel(desc_dma & 0xffffffff, gp->regs + RXDMA_DBLOW);
writel(RX_RING_SIZE - 4, gp->regs + RXDMA_KICK);
val = (RXDMA_CFG_BASE | (RX_OFFSET << 10) |
((14 / 2) << 13) | RXDMA_CFG_FTHRESH_128);
writel(val, gp->regs + RXDMA_CFG);
if (readl(gp->regs + GREG_BIFCFG) & GREG_BIFCFG_M66EN)
writel(((5 & RXDMA_BLANK_IPKTS) |
((8 << 12) & RXDMA_BLANK_ITIME)),
gp->regs + RXDMA_BLANK);
else
writel(((5 & RXDMA_BLANK_IPKTS) |
((4 << 12) & RXDMA_BLANK_ITIME)),
gp->regs + RXDMA_BLANK);
val = (((gp->rx_pause_off / 64) << 0) & RXDMA_PTHRESH_OFF);
val |= (((gp->rx_pause_on / 64) << 12) & RXDMA_PTHRESH_ON);
writel(val, gp->regs + RXDMA_PTHRESH);
val = readl(gp->regs + RXDMA_CFG);
writel(val | RXDMA_CFG_ENABLE, gp->regs + RXDMA_CFG);
writel(MAC_RXSTAT_RCV, gp->regs + MAC_RXMASK);
val = readl(gp->regs + MAC_RXCFG);
writel(val | MAC_RXCFG_ENAB, gp->regs + MAC_RXCFG);
return 0;
}
static int gem_rxmac_interrupt(struct net_device *dev, struct gem *gp, u32 gem_status)
{
u32 rxmac_stat = readl(gp->regs + MAC_RXSTAT);
int ret = 0;
if (netif_msg_intr(gp))
printk(KERN_DEBUG "%s: rxmac interrupt, rxmac_stat: 0x%x\n",
gp->dev->name, rxmac_stat);
if (rxmac_stat & MAC_RXSTAT_OFLW) {
u32 smac = readl(gp->regs + MAC_SMACHINE);
printk(KERN_ERR "%s: RX MAC fifo overflow smac[%08x].\n",
dev->name, smac);
gp->net_stats.rx_over_errors++;
gp->net_stats.rx_fifo_errors++;
ret = gem_rxmac_reset(gp);
}
if (rxmac_stat & MAC_RXSTAT_ACE)
gp->net_stats.rx_frame_errors += 0x10000;
if (rxmac_stat & MAC_RXSTAT_CCE)
gp->net_stats.rx_crc_errors += 0x10000;
if (rxmac_stat & MAC_RXSTAT_LCE)
gp->net_stats.rx_length_errors += 0x10000;
/* We do not track MAC_RXSTAT_FCE and MAC_RXSTAT_VCE
* events.
*/
return ret;
}
static int gem_mac_interrupt(struct net_device *dev, struct gem *gp, u32 gem_status)
{
u32 mac_cstat = readl(gp->regs + MAC_CSTAT);
if (netif_msg_intr(gp))
printk(KERN_DEBUG "%s: mac interrupt, mac_cstat: 0x%x\n",
gp->dev->name, mac_cstat);
/* This interrupt is just for pause frame and pause
* tracking. It is useful for diagnostics and debug
* but probably by default we will mask these events.
*/
if (mac_cstat & MAC_CSTAT_PS)
gp->pause_entered++;
if (mac_cstat & MAC_CSTAT_PRCV)
gp->pause_last_time_recvd = (mac_cstat >> 16);
return 0;
}
static int gem_mif_interrupt(struct net_device *dev, struct gem *gp, u32 gem_status)
{
u32 mif_status = readl(gp->regs + MIF_STATUS);
u32 reg_val, changed_bits;
reg_val = (mif_status & MIF_STATUS_DATA) >> 16;
changed_bits = (mif_status & MIF_STATUS_STAT);
gem_handle_mif_event(gp, reg_val, changed_bits);
return 0;
}
static int gem_pci_interrupt(struct net_device *dev, struct gem *gp, u32 gem_status)
{
u32 pci_estat = readl(gp->regs + GREG_PCIESTAT);
if (gp->pdev->vendor == PCI_VENDOR_ID_SUN &&
gp->pdev->device == PCI_DEVICE_ID_SUN_GEM) {
printk(KERN_ERR "%s: PCI error [%04x] ",
dev->name, pci_estat);
if (pci_estat & GREG_PCIESTAT_BADACK)
printk("<No ACK64# during ABS64 cycle> ");
if (pci_estat & GREG_PCIESTAT_DTRTO)
printk("<Delayed transaction timeout> ");
if (pci_estat & GREG_PCIESTAT_OTHER)
printk("<other>");
printk("\n");
} else {
pci_estat |= GREG_PCIESTAT_OTHER;
printk(KERN_ERR "%s: PCI error\n", dev->name);
}
if (pci_estat & GREG_PCIESTAT_OTHER) {
u16 pci_cfg_stat;
/* Interrogate PCI config space for the
* true cause.
*/
pci_read_config_word(gp->pdev, PCI_STATUS,
&pci_cfg_stat);
printk(KERN_ERR "%s: Read PCI cfg space status [%04x]\n",
dev->name, pci_cfg_stat);
if (pci_cfg_stat & PCI_STATUS_PARITY)
printk(KERN_ERR "%s: PCI parity error detected.\n",
dev->name);
if (pci_cfg_stat & PCI_STATUS_SIG_TARGET_ABORT)
printk(KERN_ERR "%s: PCI target abort.\n",
dev->name);
if (pci_cfg_stat & PCI_STATUS_REC_TARGET_ABORT)
printk(KERN_ERR "%s: PCI master acks target abort.\n",
dev->name);
if (pci_cfg_stat & PCI_STATUS_REC_MASTER_ABORT)
printk(KERN_ERR "%s: PCI master abort.\n",
dev->name);
if (pci_cfg_stat & PCI_STATUS_SIG_SYSTEM_ERROR)
printk(KERN_ERR "%s: PCI system error SERR#.\n",
dev->name);
if (pci_cfg_stat & PCI_STATUS_DETECTED_PARITY)
printk(KERN_ERR "%s: PCI parity error.\n",
dev->name);
/* Write the error bits back to clear them. */
pci_cfg_stat &= (PCI_STATUS_PARITY |
PCI_STATUS_SIG_TARGET_ABORT |
PCI_STATUS_REC_TARGET_ABORT |
PCI_STATUS_REC_MASTER_ABORT |
PCI_STATUS_SIG_SYSTEM_ERROR |
PCI_STATUS_DETECTED_PARITY);
pci_write_config_word(gp->pdev,
PCI_STATUS, pci_cfg_stat);
}
/* For all PCI errors, we should reset the chip. */
return 1;
}
/* All non-normal interrupt conditions get serviced here.
* Returns non-zero if we should just exit the interrupt
* handler right now (ie. if we reset the card which invalidates
* all of the other original irq status bits).
*/
static int gem_abnormal_irq(struct net_device *dev, struct gem *gp, u32 gem_status)
{
if (gem_status & GREG_STAT_RXNOBUF) {
/* Frame arrived, no free RX buffers available. */
if (netif_msg_rx_err(gp))
printk(KERN_DEBUG "%s: no buffer for rx frame\n",
gp->dev->name);
gp->net_stats.rx_dropped++;
}
if (gem_status & GREG_STAT_RXTAGERR) {
/* corrupt RX tag framing */
if (netif_msg_rx_err(gp))
printk(KERN_DEBUG "%s: corrupt rx tag framing\n",
gp->dev->name);
gp->net_stats.rx_errors++;
goto do_reset;
}
if (gem_status & GREG_STAT_PCS) {
if (gem_pcs_interrupt(dev, gp, gem_status))
goto do_reset;
}
if (gem_status & GREG_STAT_TXMAC) {
if (gem_txmac_interrupt(dev, gp, gem_status))
goto do_reset;
}
if (gem_status & GREG_STAT_RXMAC) {
if (gem_rxmac_interrupt(dev, gp, gem_status))
goto do_reset;
}
if (gem_status & GREG_STAT_MAC) {
if (gem_mac_interrupt(dev, gp, gem_status))
goto do_reset;
}
if (gem_status & GREG_STAT_MIF) {
if (gem_mif_interrupt(dev, gp, gem_status))
goto do_reset;
}
if (gem_status & GREG_STAT_PCIERR) {
if (gem_pci_interrupt(dev, gp, gem_status))
goto do_reset;
}
return 0;
do_reset:
gp->reset_task_pending = 1;
schedule_work(&gp->reset_task);
return 1;
}
static __inline__ void gem_tx(struct net_device *dev, struct gem *gp, u32 gem_status)
{
int entry, limit;
if (netif_msg_intr(gp))
printk(KERN_DEBUG "%s: tx interrupt, gem_status: 0x%x\n",
gp->dev->name, gem_status);
entry = gp->tx_old;
limit = ((gem_status & GREG_STAT_TXNR) >> GREG_STAT_TXNR_SHIFT);
while (entry != limit) {
struct sk_buff *skb;
struct gem_txd *txd;
dma_addr_t dma_addr;
u32 dma_len;
int frag;
if (netif_msg_tx_done(gp))
printk(KERN_DEBUG "%s: tx done, slot %d\n",
gp->dev->name, entry);
skb = gp->tx_skbs[entry];
if (skb_shinfo(skb)->nr_frags) {
int last = entry + skb_shinfo(skb)->nr_frags;
int walk = entry;
int incomplete = 0;
last &= (TX_RING_SIZE - 1);
for (;;) {
walk = NEXT_TX(walk);
if (walk == limit)
incomplete = 1;
if (walk == last)
break;
}
if (incomplete)
break;
}
gp->tx_skbs[entry] = NULL;
gp->net_stats.tx_bytes += skb->len;
for (frag = 0; frag <= skb_shinfo(skb)->nr_frags; frag++) {
txd = &gp->init_block->txd[entry];
dma_addr = le64_to_cpu(txd->buffer);
dma_len = le64_to_cpu(txd->control_word) & TXDCTRL_BUFSZ;
pci_unmap_page(gp->pdev, dma_addr, dma_len, PCI_DMA_TODEVICE);
entry = NEXT_TX(entry);
}
gp->net_stats.tx_packets++;
dev_kfree_skb_irq(skb);
}
gp->tx_old = entry;
if (netif_queue_stopped(dev) &&
TX_BUFFS_AVAIL(gp) > (MAX_SKB_FRAGS + 1))
netif_wake_queue(dev);
}
static __inline__ void gem_post_rxds(struct gem *gp, int limit)
{
int cluster_start, curr, count, kick;
cluster_start = curr = (gp->rx_new & ~(4 - 1));
count = 0;
kick = -1;
wmb();
while (curr != limit) {
curr = NEXT_RX(curr);
if (++count == 4) {
struct gem_rxd *rxd =
&gp->init_block->rxd[cluster_start];
for (;;) {
rxd->status_word = cpu_to_le64(RXDCTRL_FRESH(gp));
rxd++;
cluster_start = NEXT_RX(cluster_start);
if (cluster_start == curr)
break;
}
kick = curr;
count = 0;
}
}
if (kick >= 0) {
mb();
writel(kick, gp->regs + RXDMA_KICK);
}
}
static int gem_rx(struct gem *gp, int work_to_do)
{
int entry, drops, work_done = 0;
u32 done;
if (netif_msg_rx_status(gp))
printk(KERN_DEBUG "%s: rx interrupt, done: %d, rx_new: %d\n",
gp->dev->name, readl(gp->regs + RXDMA_DONE), gp->rx_new);
entry = gp->rx_new;
drops = 0;
done = readl(gp->regs + RXDMA_DONE);
for (;;) {
struct gem_rxd *rxd = &gp->init_block->rxd[entry];
struct sk_buff *skb;
u64 status = cpu_to_le64(rxd->status_word);
dma_addr_t dma_addr;
int len;
if ((status & RXDCTRL_OWN) != 0)
break;
if (work_done >= RX_RING_SIZE || work_done >= work_to_do)
break;
/* When writing back RX descriptor, GEM writes status
* then buffer address, possibly in seperate transactions.
* If we don't wait for the chip to write both, we could
* post a new buffer to this descriptor then have GEM spam
* on the buffer address. We sync on the RX completion
* register to prevent this from happening.
*/
if (entry == done) {
done = readl(gp->regs + RXDMA_DONE);
if (entry == done)
break;
}
/* We can now account for the work we're about to do */
work_done++;
skb = gp->rx_skbs[entry];
len = (status & RXDCTRL_BUFSZ) >> 16;
if ((len < ETH_ZLEN) || (status & RXDCTRL_BAD)) {
gp->net_stats.rx_errors++;
if (len < ETH_ZLEN)
gp->net_stats.rx_length_errors++;
if (len & RXDCTRL_BAD)
gp->net_stats.rx_crc_errors++;
/* We'll just return it to GEM. */
drop_it:
gp->net_stats.rx_dropped++;
goto next;
}
dma_addr = cpu_to_le64(rxd->buffer);
if (len > RX_COPY_THRESHOLD) {
struct sk_buff *new_skb;
new_skb = gem_alloc_skb(RX_BUF_ALLOC_SIZE(gp), GFP_ATOMIC);
if (new_skb == NULL) {
drops++;
goto drop_it;
}
pci_unmap_page(gp->pdev, dma_addr,
RX_BUF_ALLOC_SIZE(gp),
PCI_DMA_FROMDEVICE);
gp->rx_skbs[entry] = new_skb;
new_skb->dev = gp->dev;
skb_put(new_skb, (gp->rx_buf_sz + RX_OFFSET));
rxd->buffer = cpu_to_le64(pci_map_page(gp->pdev,
virt_to_page(new_skb->data),
offset_in_page(new_skb->data),
RX_BUF_ALLOC_SIZE(gp),
PCI_DMA_FROMDEVICE));
skb_reserve(new_skb, RX_OFFSET);
/* Trim the original skb for the netif. */
skb_trim(skb, len);
} else {
struct sk_buff *copy_skb = dev_alloc_skb(len + 2);
if (copy_skb == NULL) {
drops++;
goto drop_it;
}
copy_skb->dev = gp->dev;
skb_reserve(copy_skb, 2);
skb_put(copy_skb, len);
pci_dma_sync_single_for_cpu(gp->pdev, dma_addr, len, PCI_DMA_FROMDEVICE);
memcpy(copy_skb->data, skb->data, len);
pci_dma_sync_single_for_device(gp->pdev, dma_addr, len, PCI_DMA_FROMDEVICE);
/* We'll reuse the original ring buffer. */
skb = copy_skb;
}
skb->csum = ntohs((status & RXDCTRL_TCPCSUM) ^ 0xffff);
skb->ip_summed = CHECKSUM_COMPLETE;
skb->protocol = eth_type_trans(skb, gp->dev);
netif_receive_skb(skb);
gp->net_stats.rx_packets++;
gp->net_stats.rx_bytes += len;
gp->dev->last_rx = jiffies;
next:
entry = NEXT_RX(entry);
}
gem_post_rxds(gp, entry);
gp->rx_new = entry;
if (drops)
printk(KERN_INFO "%s: Memory squeeze, deferring packet.\n",
gp->dev->name);
return work_done;
}
static int gem_poll(struct net_device *dev, int *budget)
{
struct gem *gp = dev->priv;
unsigned long flags;
/*
* NAPI locking nightmare: See comment at head of driver
*/
spin_lock_irqsave(&gp->lock, flags);
do {
int work_to_do, work_done;
/* Handle anomalies */
if (gp->status & GREG_STAT_ABNORMAL) {
if (gem_abnormal_irq(dev, gp, gp->status))
break;
}
/* Run TX completion thread */
spin_lock(&gp->tx_lock);
gem_tx(dev, gp, gp->status);
spin_unlock(&gp->tx_lock);
spin_unlock_irqrestore(&gp->lock, flags);
/* Run RX thread. We don't use any locking here,
* code willing to do bad things - like cleaning the
* rx ring - must call netif_poll_disable(), which
* schedule_timeout()'s if polling is already disabled.
*/
work_to_do = min(*budget, dev->quota);
work_done = gem_rx(gp, work_to_do);
*budget -= work_done;
dev->quota -= work_done;
if (work_done >= work_to_do)
return 1;
spin_lock_irqsave(&gp->lock, flags);
gp->status = readl(gp->regs + GREG_STAT);
} while (gp->status & GREG_STAT_NAPI);
__netif_rx_complete(dev);
gem_enable_ints(gp);
spin_unlock_irqrestore(&gp->lock, flags);
return 0;
}
static irqreturn_t gem_interrupt(int irq, void *dev_id)
{
struct net_device *dev = dev_id;
struct gem *gp = dev->priv;
unsigned long flags;
/* Swallow interrupts when shutting the chip down, though
* that shouldn't happen, we should have done free_irq() at
* this point...
*/
if (!gp->running)
return IRQ_HANDLED;
spin_lock_irqsave(&gp->lock, flags);
if (netif_rx_schedule_prep(dev)) {
u32 gem_status = readl(gp->regs + GREG_STAT);
if (gem_status == 0) {
netif_poll_enable(dev);
spin_unlock_irqrestore(&gp->lock, flags);
return IRQ_NONE;
}
gp->status = gem_status;
gem_disable_ints(gp);
__netif_rx_schedule(dev);
}
spin_unlock_irqrestore(&gp->lock, flags);
/* If polling was disabled at the time we received that
* interrupt, we may return IRQ_HANDLED here while we
* should return IRQ_NONE. No big deal...
*/
return IRQ_HANDLED;
}
#ifdef CONFIG_NET_POLL_CONTROLLER
static void gem_poll_controller(struct net_device *dev)
{
/* gem_interrupt is safe to reentrance so no need
* to disable_irq here.
*/
gem_interrupt(dev->irq, dev);
}
#endif
static void gem_tx_timeout(struct net_device *dev)
{
struct gem *gp = dev->priv;
printk(KERN_ERR "%s: transmit timed out, resetting\n", dev->name);
if (!gp->running) {
printk("%s: hrm.. hw not running !\n", dev->name);
return;
}
printk(KERN_ERR "%s: TX_STATE[%08x:%08x:%08x]\n",
dev->name,
readl(gp->regs + TXDMA_CFG),
readl(gp->regs + MAC_TXSTAT),
readl(gp->regs + MAC_TXCFG));
printk(KERN_ERR "%s: RX_STATE[%08x:%08x:%08x]\n",
dev->name,
readl(gp->regs + RXDMA_CFG),
readl(gp->regs + MAC_RXSTAT),
readl(gp->regs + MAC_RXCFG));
spin_lock_irq(&gp->lock);
spin_lock(&gp->tx_lock);
gp->reset_task_pending = 1;
schedule_work(&gp->reset_task);
spin_unlock(&gp->tx_lock);
spin_unlock_irq(&gp->lock);
}
static __inline__ int gem_intme(int entry)
{
/* Algorithm: IRQ every 1/2 of descriptors. */
if (!(entry & ((TX_RING_SIZE>>1)-1)))
return 1;
return 0;
}
static int gem_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct gem *gp = dev->priv;
int entry;
u64 ctrl;
unsigned long flags;
ctrl = 0;
if (skb->ip_summed == CHECKSUM_PARTIAL) {
u64 csum_start_off, csum_stuff_off;
csum_start_off = (u64) (skb->h.raw - skb->data);
csum_stuff_off = (u64) ((skb->h.raw + skb->csum) - skb->data);
ctrl = (TXDCTRL_CENAB |
(csum_start_off << 15) |
(csum_stuff_off << 21));
}
local_irq_save(flags);
if (!spin_trylock(&gp->tx_lock)) {
/* Tell upper layer to requeue */
local_irq_restore(flags);
return NETDEV_TX_LOCKED;
}
/* We raced with gem_do_stop() */
if (!gp->running) {
spin_unlock_irqrestore(&gp->tx_lock, flags);
return NETDEV_TX_BUSY;
}
/* This is a hard error, log it. */
if (TX_BUFFS_AVAIL(gp) <= (skb_shinfo(skb)->nr_frags + 1)) {
netif_stop_queue(dev);
spin_unlock_irqrestore(&gp->tx_lock, flags);
printk(KERN_ERR PFX "%s: BUG! Tx Ring full when queue awake!\n",
dev->name);
return NETDEV_TX_BUSY;
}
entry = gp->tx_new;
gp->tx_skbs[entry] = skb;
if (skb_shinfo(skb)->nr_frags == 0) {
struct gem_txd *txd = &gp->init_block->txd[entry];
dma_addr_t mapping;
u32 len;
len = skb->len;
mapping = pci_map_page(gp->pdev,
virt_to_page(skb->data),
offset_in_page(skb->data),
len, PCI_DMA_TODEVICE);
ctrl |= TXDCTRL_SOF | TXDCTRL_EOF | len;
if (gem_intme(entry))
ctrl |= TXDCTRL_INTME;
txd->buffer = cpu_to_le64(mapping);
wmb();
txd->control_word = cpu_to_le64(ctrl);
entry = NEXT_TX(entry);
} else {
struct gem_txd *txd;
u32 first_len;
u64 intme;
dma_addr_t first_mapping;
int frag, first_entry = entry;
intme = 0;
if (gem_intme(entry))
intme |= TXDCTRL_INTME;
/* We must give this initial chunk to the device last.
* Otherwise we could race with the device.
*/
first_len = skb_headlen(skb);
first_mapping = pci_map_page(gp->pdev, virt_to_page(skb->data),
offset_in_page(skb->data),
first_len, PCI_DMA_TODEVICE);
entry = NEXT_TX(entry);
for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
skb_frag_t *this_frag = &skb_shinfo(skb)->frags[frag];
u32 len;
dma_addr_t mapping;
u64 this_ctrl;
len = this_frag->size;
mapping = pci_map_page(gp->pdev,
this_frag->page,
this_frag->page_offset,
len, PCI_DMA_TODEVICE);
this_ctrl = ctrl;
if (frag == skb_shinfo(skb)->nr_frags - 1)
this_ctrl |= TXDCTRL_EOF;
txd = &gp->init_block->txd[entry];
txd->buffer = cpu_to_le64(mapping);
wmb();
txd->control_word = cpu_to_le64(this_ctrl | len);
if (gem_intme(entry))
intme |= TXDCTRL_INTME;
entry = NEXT_TX(entry);
}
txd = &gp->init_block->txd[first_entry];
txd->buffer = cpu_to_le64(first_mapping);
wmb();
txd->control_word =
cpu_to_le64(ctrl | TXDCTRL_SOF | intme | first_len);
}
gp->tx_new = entry;
if (TX_BUFFS_AVAIL(gp) <= (MAX_SKB_FRAGS + 1))
netif_stop_queue(dev);
if (netif_msg_tx_queued(gp))
printk(KERN_DEBUG "%s: tx queued, slot %d, skblen %d\n",
dev->name, entry, skb->len);
mb();
writel(gp->tx_new, gp->regs + TXDMA_KICK);
spin_unlock_irqrestore(&gp->tx_lock, flags);
dev->trans_start = jiffies;
return NETDEV_TX_OK;
}
#define STOP_TRIES 32
/* Must be invoked under gp->lock and gp->tx_lock. */
static void gem_reset(struct gem *gp)
{
int limit;
u32 val;
/* Make sure we won't get any more interrupts */
writel(0xffffffff, gp->regs + GREG_IMASK);
/* Reset the chip */
writel(gp->swrst_base | GREG_SWRST_TXRST | GREG_SWRST_RXRST,
gp->regs + GREG_SWRST);
limit = STOP_TRIES;
do {
udelay(20);
val = readl(gp->regs + GREG_SWRST);
if (limit-- <= 0)
break;
} while (val & (GREG_SWRST_TXRST | GREG_SWRST_RXRST));
if (limit <= 0)
printk(KERN_ERR "%s: SW reset is ghetto.\n", gp->dev->name);
}
/* Must be invoked under gp->lock and gp->tx_lock. */
static void gem_start_dma(struct gem *gp)
{
u32 val;
/* We are ready to rock, turn everything on. */
val = readl(gp->regs + TXDMA_CFG);
writel(val | TXDMA_CFG_ENABLE, gp->regs + TXDMA_CFG);
val = readl(gp->regs + RXDMA_CFG);
writel(val | RXDMA_CFG_ENABLE, gp->regs + RXDMA_CFG);
val = readl(gp->regs + MAC_TXCFG);
writel(val | MAC_TXCFG_ENAB, gp->regs + MAC_TXCFG);
val = readl(gp->regs + MAC_RXCFG);
writel(val | MAC_RXCFG_ENAB, gp->regs + MAC_RXCFG);
(void) readl(gp->regs + MAC_RXCFG);
udelay(100);
gem_enable_ints(gp);
writel(RX_RING_SIZE - 4, gp->regs + RXDMA_KICK);
}
/* Must be invoked under gp->lock and gp->tx_lock. DMA won't be
* actually stopped before about 4ms tho ...
*/
static void gem_stop_dma(struct gem *gp)
{
u32 val;
/* We are done rocking, turn everything off. */
val = readl(gp->regs + TXDMA_CFG);
writel(val & ~TXDMA_CFG_ENABLE, gp->regs + TXDMA_CFG);
val = readl(gp->regs + RXDMA_CFG);
writel(val & ~RXDMA_CFG_ENABLE, gp->regs + RXDMA_CFG);
val = readl(gp->regs + MAC_TXCFG);
writel(val & ~MAC_TXCFG_ENAB, gp->regs + MAC_TXCFG);
val = readl(gp->regs + MAC_RXCFG);
writel(val & ~MAC_RXCFG_ENAB, gp->regs + MAC_RXCFG);
(void) readl(gp->regs + MAC_RXCFG);
/* Need to wait a bit ... done by the caller */
}
/* Must be invoked under gp->lock and gp->tx_lock. */
// XXX dbl check what that function should do when called on PCS PHY
static void gem_begin_auto_negotiation(struct gem *gp, struct ethtool_cmd *ep)
{
u32 advertise, features;
int autoneg;
int speed;
int duplex;
if (gp->phy_type != phy_mii_mdio0 &&
gp->phy_type != phy_mii_mdio1)
goto non_mii;
/* Setup advertise */
if (found_mii_phy(gp))
features = gp->phy_mii.def->features;
else
features = 0;
advertise = features & ADVERTISE_MASK;
if (gp->phy_mii.advertising != 0)
advertise &= gp->phy_mii.advertising;
autoneg = gp->want_autoneg;
speed = gp->phy_mii.speed;
duplex = gp->phy_mii.duplex;
/* Setup link parameters */
if (!ep)
goto start_aneg;
if (ep->autoneg == AUTONEG_ENABLE) {
advertise = ep->advertising;
autoneg = 1;
} else {
autoneg = 0;
speed = ep->speed;
duplex = ep->duplex;
}
start_aneg:
/* Sanitize settings based on PHY capabilities */
if ((features & SUPPORTED_Autoneg) == 0)
autoneg = 0;
if (speed == SPEED_1000 &&
!(features & (SUPPORTED_1000baseT_Half | SUPPORTED_1000baseT_Full)))
speed = SPEED_100;
if (speed == SPEED_100 &&
!(features & (SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full)))
speed = SPEED_10;
if (duplex == DUPLEX_FULL &&
!(features & (SUPPORTED_1000baseT_Full |
SUPPORTED_100baseT_Full |
SUPPORTED_10baseT_Full)))
duplex = DUPLEX_HALF;
if (speed == 0)
speed = SPEED_10;
/* If we are asleep, we don't try to actually setup the PHY, we
* just store the settings
*/
if (gp->asleep) {
gp->phy_mii.autoneg = gp->want_autoneg = autoneg;
gp->phy_mii.speed = speed;
gp->phy_mii.duplex = duplex;
return;
}
/* Configure PHY & start aneg */
gp->want_autoneg = autoneg;
if (autoneg) {
if (found_mii_phy(gp))
gp->phy_mii.def->ops->setup_aneg(&gp->phy_mii, advertise);
gp->lstate = link_aneg;
} else {
if (found_mii_phy(gp))
gp->phy_mii.def->ops->setup_forced(&gp->phy_mii, speed, duplex);
gp->lstate = link_force_ok;
}
non_mii:
gp->timer_ticks = 0;
mod_timer(&gp->link_timer, jiffies + ((12 * HZ) / 10));
}
/* A link-up condition has occurred, initialize and enable the
* rest of the chip.
*
* Must be invoked under gp->lock and gp->tx_lock.
*/
static int gem_set_link_modes(struct gem *gp)
{
u32 val;
int full_duplex, speed, pause;
full_duplex = 0;
speed = SPEED_10;
pause = 0;
if (found_mii_phy(gp)) {
if (gp->phy_mii.def->ops->read_link(&gp->phy_mii))
return 1;
full_duplex = (gp->phy_mii.duplex == DUPLEX_FULL);
speed = gp->phy_mii.speed;
pause = gp->phy_mii.pause;
} else if (gp->phy_type == phy_serialink ||
gp->phy_type == phy_serdes) {
u32 pcs_lpa = readl(gp->regs + PCS_MIILP);
if (pcs_lpa & PCS_MIIADV_FD)
full_duplex = 1;
speed = SPEED_1000;
}
if (netif_msg_link(gp))
printk(KERN_INFO "%s: Link is up at %d Mbps, %s-duplex.\n",
gp->dev->name, speed, (full_duplex ? "full" : "half"));
if (!gp->running)
return 0;
val = (MAC_TXCFG_EIPG0 | MAC_TXCFG_NGU);
if (full_duplex) {
val |= (MAC_TXCFG_ICS | MAC_TXCFG_ICOLL);
} else {
/* MAC_TXCFG_NBO must be zero. */
}
writel(val, gp->regs + MAC_TXCFG);
val = (MAC_XIFCFG_OE | MAC_XIFCFG_LLED);
if (!full_duplex &&
(gp->phy_type == phy_mii_mdio0 ||
gp->phy_type == phy_mii_mdio1)) {
val |= MAC_XIFCFG_DISE;
} else if (full_duplex) {
val |= MAC_XIFCFG_FLED;
}
if (speed == SPEED_1000)
val |= (MAC_XIFCFG_GMII);
writel(val, gp->regs + MAC_XIFCFG);
/* If gigabit and half-duplex, enable carrier extension
* mode. Else, disable it.
*/
if (speed == SPEED_1000 && !full_duplex) {
val = readl(gp->regs + MAC_TXCFG);
writel(val | MAC_TXCFG_TCE, gp->regs + MAC_TXCFG);
val = readl(gp->regs + MAC_RXCFG);
writel(val | MAC_RXCFG_RCE, gp->regs + MAC_RXCFG);
} else {
val = readl(gp->regs + MAC_TXCFG);
writel(val & ~MAC_TXCFG_TCE, gp->regs + MAC_TXCFG);
val = readl(gp->regs + MAC_RXCFG);
writel(val & ~MAC_RXCFG_RCE, gp->regs + MAC_RXCFG);
}
if (gp->phy_type == phy_serialink ||
gp->phy_type == phy_serdes) {
u32 pcs_lpa = readl(gp->regs + PCS_MIILP);
if (pcs_lpa & (PCS_MIIADV_SP | PCS_MIIADV_AP))
pause = 1;
}
if (netif_msg_link(gp)) {
if (pause) {
printk(KERN_INFO "%s: Pause is enabled "
"(rxfifo: %d off: %d on: %d)\n",
gp->dev->name,
gp->rx_fifo_sz,
gp->rx_pause_off,
gp->rx_pause_on);
} else {
printk(KERN_INFO "%s: Pause is disabled\n",
gp->dev->name);
}
}
if (!full_duplex)
writel(512, gp->regs + MAC_STIME);
else
writel(64, gp->regs + MAC_STIME);
val = readl(gp->regs + MAC_MCCFG);
if (pause)
val |= (MAC_MCCFG_SPE | MAC_MCCFG_RPE);
else
val &= ~(MAC_MCCFG_SPE | MAC_MCCFG_RPE);
writel(val, gp->regs + MAC_MCCFG);
gem_start_dma(gp);
return 0;
}
/* Must be invoked under gp->lock and gp->tx_lock. */
static int gem_mdio_link_not_up(struct gem *gp)
{
switch (gp->lstate) {
case link_force_ret:
if (netif_msg_link(gp))
printk(KERN_INFO "%s: Autoneg failed again, keeping"
" forced mode\n", gp->dev->name);
gp->phy_mii.def->ops->setup_forced(&gp->phy_mii,
gp->last_forced_speed, DUPLEX_HALF);
gp->timer_ticks = 5;
gp->lstate = link_force_ok;
return 0;
case link_aneg:
/* We try forced modes after a failed aneg only on PHYs that don't
* have "magic_aneg" bit set, which means they internally do the
* while forced-mode thingy. On these, we just restart aneg
*/
if (gp->phy_mii.def->magic_aneg)
return 1;
if (netif_msg_link(gp))
printk(KERN_INFO "%s: switching to forced 100bt\n",
gp->dev->name);
/* Try forced modes. */
gp->phy_mii.def->ops->setup_forced(&gp->phy_mii, SPEED_100,
DUPLEX_HALF);
gp->timer_ticks = 5;
gp->lstate = link_force_try;
return 0;
case link_force_try:
/* Downgrade from 100 to 10 Mbps if necessary.
* If already at 10Mbps, warn user about the
* situation every 10 ticks.
*/
if (gp->phy_mii.speed == SPEED_100) {
gp->phy_mii.def->ops->setup_forced(&gp->phy_mii, SPEED_10,
DUPLEX_HALF);
gp->timer_ticks = 5;
if (netif_msg_link(gp))
printk(KERN_INFO "%s: switching to forced 10bt\n",
gp->dev->name);
return 0;
} else
return 1;
default:
return 0;
}
}
static void gem_link_timer(unsigned long data)
{
struct gem *gp = (struct gem *) data;
int restart_aneg = 0;
if (gp->asleep)
return;
spin_lock_irq(&gp->lock);
spin_lock(&gp->tx_lock);
gem_get_cell(gp);
/* If the reset task is still pending, we just
* reschedule the link timer
*/
if (gp->reset_task_pending)
goto restart;
if (gp->phy_type == phy_serialink ||
gp->phy_type == phy_serdes) {
u32 val = readl(gp->regs + PCS_MIISTAT);
if (!(val & PCS_MIISTAT_LS))
val = readl(gp->regs + PCS_MIISTAT);
if ((val & PCS_MIISTAT_LS) != 0) {
gp->lstate = link_up;
netif_carrier_on(gp->dev);
(void)gem_set_link_modes(gp);
}
goto restart;
}
if (found_mii_phy(gp) && gp->phy_mii.def->ops->poll_link(&gp->phy_mii)) {
/* Ok, here we got a link. If we had it due to a forced
* fallback, and we were configured for autoneg, we do
* retry a short autoneg pass. If you know your hub is
* broken, use ethtool ;)
*/
if (gp->lstate == link_force_try && gp->want_autoneg) {
gp->lstate = link_force_ret;
gp->last_forced_speed = gp->phy_mii.speed;
gp->timer_ticks = 5;
if (netif_msg_link(gp))
printk(KERN_INFO "%s: Got link after fallback, retrying"
" autoneg once...\n", gp->dev->name);
gp->phy_mii.def->ops->setup_aneg(&gp->phy_mii, gp->phy_mii.advertising);
} else if (gp->lstate != link_up) {
gp->lstate = link_up;
netif_carrier_on(gp->dev);
if (gem_set_link_modes(gp))
restart_aneg = 1;
}
} else {
/* If the link was previously up, we restart the
* whole process
*/
if (gp->lstate == link_up) {
gp->lstate = link_down;
if (netif_msg_link(gp))
printk(KERN_INFO "%s: Link down\n",
gp->dev->name);
netif_carrier_off(gp->dev);
gp->reset_task_pending = 1;
schedule_work(&gp->reset_task);
restart_aneg = 1;
} else if (++gp->timer_ticks > 10) {
if (found_mii_phy(gp))
restart_aneg = gem_mdio_link_not_up(gp);
else
restart_aneg = 1;
}
}
if (restart_aneg) {
gem_begin_auto_negotiation(gp, NULL);
goto out_unlock;
}
restart:
mod_timer(&gp->link_timer, jiffies + ((12 * HZ) / 10));
out_unlock:
gem_put_cell(gp);
spin_unlock(&gp->tx_lock);
spin_unlock_irq(&gp->lock);
}
/* Must be invoked under gp->lock and gp->tx_lock. */
static void gem_clean_rings(struct gem *gp)
{
struct gem_init_block *gb = gp->init_block;
struct sk_buff *skb;
int i;
dma_addr_t dma_addr;
for (i = 0; i < RX_RING_SIZE; i++) {
struct gem_rxd *rxd;
rxd = &gb->rxd[i];
if (gp->rx_skbs[i] != NULL) {
skb = gp->rx_skbs[i];
dma_addr = le64_to_cpu(rxd->buffer);
pci_unmap_page(gp->pdev, dma_addr,
RX_BUF_ALLOC_SIZE(gp),
PCI_DMA_FROMDEVICE);
dev_kfree_skb_any(skb);
gp->rx_skbs[i] = NULL;
}
rxd->status_word = 0;
wmb();
rxd->buffer = 0;
}
for (i = 0; i < TX_RING_SIZE; i++) {
if (gp->tx_skbs[i] != NULL) {
struct gem_txd *txd;
int frag;
skb = gp->tx_skbs[i];
gp->tx_skbs[i] = NULL;
for (frag = 0; frag <= skb_shinfo(skb)->nr_frags; frag++) {
int ent = i & (TX_RING_SIZE - 1);
txd = &gb->txd[ent];
dma_addr = le64_to_cpu(txd->buffer);
pci_unmap_page(gp->pdev, dma_addr,
le64_to_cpu(txd->control_word) &
TXDCTRL_BUFSZ, PCI_DMA_TODEVICE);
if (frag != skb_shinfo(skb)->nr_frags)
i++;
}
dev_kfree_skb_any(skb);
}
}
}
/* Must be invoked under gp->lock and gp->tx_lock. */
static void gem_init_rings(struct gem *gp)
{
struct gem_init_block *gb = gp->init_block;
struct net_device *dev = gp->dev;
int i;
dma_addr_t dma_addr;
gp->rx_new = gp->rx_old = gp->tx_new = gp->tx_old = 0;
gem_clean_rings(gp);
gp->rx_buf_sz = max(dev->mtu + ETH_HLEN + VLAN_HLEN,
(unsigned)VLAN_ETH_FRAME_LEN);
for (i = 0; i < RX_RING_SIZE; i++) {
struct sk_buff *skb;
struct gem_rxd *rxd = &gb->rxd[i];
skb = gem_alloc_skb(RX_BUF_ALLOC_SIZE(gp), GFP_ATOMIC);
if (!skb) {
rxd->buffer = 0;
rxd->status_word = 0;
continue;
}
gp->rx_skbs[i] = skb;
skb->dev = dev;
skb_put(skb, (gp->rx_buf_sz + RX_OFFSET));
dma_addr = pci_map_page(gp->pdev,
virt_to_page(skb->data),
offset_in_page(skb->data),
RX_BUF_ALLOC_SIZE(gp),
PCI_DMA_FROMDEVICE);
rxd->buffer = cpu_to_le64(dma_addr);
wmb();
rxd->status_word = cpu_to_le64(RXDCTRL_FRESH(gp));
skb_reserve(skb, RX_OFFSET);
}
for (i = 0; i < TX_RING_SIZE; i++) {
struct gem_txd *txd = &gb->txd[i];
txd->control_word = 0;
wmb();
txd->buffer = 0;
}
wmb();
}
/* Init PHY interface and start link poll state machine */
static void gem_init_phy(struct gem *gp)
{
u32 mifcfg;
/* Revert MIF CFG setting done on stop_phy */
mifcfg = readl(gp->regs + MIF_CFG);
mifcfg &= ~MIF_CFG_BBMODE;
writel(mifcfg, gp->regs + MIF_CFG);
if (gp->pdev->vendor == PCI_VENDOR_ID_APPLE) {
int i;
/* Those delay sucks, the HW seem to love them though, I'll
* serisouly consider breaking some locks here to be able
* to schedule instead
*/
for (i = 0; i < 3; i++) {
#ifdef CONFIG_PPC_PMAC
pmac_call_feature(PMAC_FTR_GMAC_PHY_RESET, gp->of_node, 0, 0);
msleep(20);
#endif
/* Some PHYs used by apple have problem getting back to us,
* we do an additional reset here
*/
phy_write(gp, MII_BMCR, BMCR_RESET);
msleep(20);
if (phy_read(gp, MII_BMCR) != 0xffff)
break;
if (i == 2)
printk(KERN_WARNING "%s: GMAC PHY not responding !\n",
gp->dev->name);
}
}
if (gp->pdev->vendor == PCI_VENDOR_ID_SUN &&
gp->pdev->device == PCI_DEVICE_ID_SUN_GEM) {
u32 val;
/* Init datapath mode register. */
if (gp->phy_type == phy_mii_mdio0 ||
gp->phy_type == phy_mii_mdio1) {
val = PCS_DMODE_MGM;
} else if (gp->phy_type == phy_serialink) {
val = PCS_DMODE_SM | PCS_DMODE_GMOE;
} else {
val = PCS_DMODE_ESM;
}
writel(val, gp->regs + PCS_DMODE);
}
if (gp->phy_type == phy_mii_mdio0 ||
gp->phy_type == phy_mii_mdio1) {
// XXX check for errors
mii_phy_probe(&gp->phy_mii, gp->mii_phy_addr);
/* Init PHY */
if (gp->phy_mii.def && gp->phy_mii.def->ops->init)
gp->phy_mii.def->ops->init(&gp->phy_mii);
} else {
u32 val;
int limit;
/* Reset PCS unit. */
val = readl(gp->regs + PCS_MIICTRL);
val |= PCS_MIICTRL_RST;
writeb(val, gp->regs + PCS_MIICTRL);
limit = 32;
while (readl(gp->regs + PCS_MIICTRL) & PCS_MIICTRL_RST) {
udelay(100);
if (limit-- <= 0)
break;
}
if (limit <= 0)
printk(KERN_WARNING "%s: PCS reset bit would not clear.\n",
gp->dev->name);
/* Make sure PCS is disabled while changing advertisement
* configuration.
*/
val = readl(gp->regs + PCS_CFG);
val &= ~(PCS_CFG_ENABLE | PCS_CFG_TO);
writel(val, gp->regs + PCS_CFG);
/* Advertise all capabilities except assymetric
* pause.
*/
val = readl(gp->regs + PCS_MIIADV);
val |= (PCS_MIIADV_FD | PCS_MIIADV_HD |
PCS_MIIADV_SP | PCS_MIIADV_AP);
writel(val, gp->regs + PCS_MIIADV);
/* Enable and restart auto-negotiation, disable wrapback/loopback,
* and re-enable PCS.
*/
val = readl(gp->regs + PCS_MIICTRL);
val |= (PCS_MIICTRL_RAN | PCS_MIICTRL_ANE);
val &= ~PCS_MIICTRL_WB;
writel(val, gp->regs + PCS_MIICTRL);
val = readl(gp->regs + PCS_CFG);
val |= PCS_CFG_ENABLE;
writel(val, gp->regs + PCS_CFG);
/* Make sure serialink loopback is off. The meaning
* of this bit is logically inverted based upon whether
* you are in Serialink or SERDES mode.
*/
val = readl(gp->regs + PCS_SCTRL);
if (gp->phy_type == phy_serialink)
val &= ~PCS_SCTRL_LOOP;
else
val |= PCS_SCTRL_LOOP;
writel(val, gp->regs + PCS_SCTRL);
}
/* Default aneg parameters */
gp->timer_ticks = 0;
gp->lstate = link_down;
netif_carrier_off(gp->dev);
/* Can I advertise gigabit here ? I'd need BCM PHY docs... */
spin_lock_irq(&gp->lock);
gem_begin_auto_negotiation(gp, NULL);
spin_unlock_irq(&gp->lock);
}
/* Must be invoked under gp->lock and gp->tx_lock. */
static void gem_init_dma(struct gem *gp)
{
u64 desc_dma = (u64) gp->gblock_dvma;
u32 val;
val = (TXDMA_CFG_BASE | (0x7ff << 10) | TXDMA_CFG_PMODE);
writel(val, gp->regs + TXDMA_CFG);
writel(desc_dma >> 32, gp->regs + TXDMA_DBHI);
writel(desc_dma & 0xffffffff, gp->regs + TXDMA_DBLOW);
desc_dma += (INIT_BLOCK_TX_RING_SIZE * sizeof(struct gem_txd));
writel(0, gp->regs + TXDMA_KICK);
val = (RXDMA_CFG_BASE | (RX_OFFSET << 10) |
((14 / 2) << 13) | RXDMA_CFG_FTHRESH_128);
writel(val, gp->regs + RXDMA_CFG);
writel(desc_dma >> 32, gp->regs + RXDMA_DBHI);
writel(desc_dma & 0xffffffff, gp->regs + RXDMA_DBLOW);
writel(RX_RING_SIZE - 4, gp->regs + RXDMA_KICK);
val = (((gp->rx_pause_off / 64) << 0) & RXDMA_PTHRESH_OFF);
val |= (((gp->rx_pause_on / 64) << 12) & RXDMA_PTHRESH_ON);
writel(val, gp->regs + RXDMA_PTHRESH);
if (readl(gp->regs + GREG_BIFCFG) & GREG_BIFCFG_M66EN)
writel(((5 & RXDMA_BLANK_IPKTS) |
((8 << 12) & RXDMA_BLANK_ITIME)),
gp->regs + RXDMA_BLANK);
else
writel(((5 & RXDMA_BLANK_IPKTS) |
((4 << 12) & RXDMA_BLANK_ITIME)),
gp->regs + RXDMA_BLANK);
}
/* Must be invoked under gp->lock and gp->tx_lock. */
static u32 gem_setup_multicast(struct gem *gp)
{
u32 rxcfg = 0;
int i;
if ((gp->dev->flags & IFF_ALLMULTI) ||
(gp->dev->mc_count > 256)) {
for (i=0; i<16; i++)
writel(0xffff, gp->regs + MAC_HASH0 + (i << 2));
rxcfg |= MAC_RXCFG_HFE;
} else if (gp->dev->flags & IFF_PROMISC) {
rxcfg |= MAC_RXCFG_PROM;
} else {
u16 hash_table[16];
u32 crc;
struct dev_mc_list *dmi = gp->dev->mc_list;
int i;
for (i = 0; i < 16; i++)
hash_table[i] = 0;
for (i = 0; i < gp->dev->mc_count; i++) {
char *addrs = dmi->dmi_addr;
dmi = dmi->next;
if (!(*addrs & 1))
continue;
crc = ether_crc_le(6, addrs);
crc >>= 24;
hash_table[crc >> 4] |= 1 << (15 - (crc & 0xf));
}
for (i=0; i<16; i++)
writel(hash_table[i], gp->regs + MAC_HASH0 + (i << 2));
rxcfg |= MAC_RXCFG_HFE;
}
return rxcfg;
}
/* Must be invoked under gp->lock and gp->tx_lock. */
static void gem_init_mac(struct gem *gp)
{
unsigned char *e = &gp->dev->dev_addr[0];
writel(0x1bf0, gp->regs + MAC_SNDPAUSE);
writel(0x00, gp->regs + MAC_IPG0);
writel(0x08, gp->regs + MAC_IPG1);
writel(0x04, gp->regs + MAC_IPG2);
writel(0x40, gp->regs + MAC_STIME);
writel(0x40, gp->regs + MAC_MINFSZ);
/* Ethernet payload + header + FCS + optional VLAN tag. */
writel(0x20000000 | (gp->rx_buf_sz + 4), gp->regs + MAC_MAXFSZ);
writel(0x07, gp->regs + MAC_PASIZE);
writel(0x04, gp->regs + MAC_JAMSIZE);
writel(0x10, gp->regs + MAC_ATTLIM);
writel(0x8808, gp->regs + MAC_MCTYPE);
writel((e[5] | (e[4] << 8)) & 0x3ff, gp->regs + MAC_RANDSEED);
writel((e[4] << 8) | e[5], gp->regs + MAC_ADDR0);
writel((e[2] << 8) | e[3], gp->regs + MAC_ADDR1);
writel((e[0] << 8) | e[1], gp->regs + MAC_ADDR2);
writel(0, gp->regs + MAC_ADDR3);
writel(0, gp->regs + MAC_ADDR4);
writel(0, gp->regs + MAC_ADDR5);
writel(0x0001, gp->regs + MAC_ADDR6);
writel(0xc200, gp->regs + MAC_ADDR7);
writel(0x0180, gp->regs + MAC_ADDR8);
writel(0, gp->regs + MAC_AFILT0);
writel(0, gp->regs + MAC_AFILT1);
writel(0, gp->regs + MAC_AFILT2);
writel(0, gp->regs + MAC_AF21MSK);
writel(0, gp->regs + MAC_AF0MSK);
gp->mac_rx_cfg = gem_setup_multicast(gp);
#ifdef STRIP_FCS
gp->mac_rx_cfg |= MAC_RXCFG_SFCS;
#endif
writel(0, gp->regs + MAC_NCOLL);
writel(0, gp->regs + MAC_FASUCC);
writel(0, gp->regs + MAC_ECOLL);
writel(0, gp->regs + MAC_LCOLL);
writel(0, gp->regs + MAC_DTIMER);
writel(0, gp->regs + MAC_PATMPS);
writel(0, gp->regs + MAC_RFCTR);
writel(0, gp->regs + MAC_LERR);
writel(0, gp->regs + MAC_AERR);
writel(0, gp->regs + MAC_FCSERR);
writel(0, gp->regs + MAC_RXCVERR);
/* Clear RX/TX/MAC/XIF config, we will set these up and enable
* them once a link is established.
*/
writel(0, gp->regs + MAC_TXCFG);
writel(gp->mac_rx_cfg, gp->regs + MAC_RXCFG);
writel(0, gp->regs + MAC_MCCFG);
writel(0, gp->regs + MAC_XIFCFG);
/* Setup MAC interrupts. We want to get all of the interesting
* counter expiration events, but we do not want to hear about
* normal rx/tx as the DMA engine tells us that.
*/
writel(MAC_TXSTAT_XMIT, gp->regs + MAC_TXMASK);
writel(MAC_RXSTAT_RCV, gp->regs + MAC_RXMASK);
/* Don't enable even the PAUSE interrupts for now, we
* make no use of those events other than to record them.
*/
writel(0xffffffff, gp->regs + MAC_MCMASK);
/* Don't enable GEM's WOL in normal operations
*/
if (gp->has_wol)
writel(0, gp->regs + WOL_WAKECSR);
}
/* Must be invoked under gp->lock and gp->tx_lock. */
static void gem_init_pause_thresholds(struct gem *gp)
{
u32 cfg;
/* Calculate pause thresholds. Setting the OFF threshold to the
* full RX fifo size effectively disables PAUSE generation which
* is what we do for 10/100 only GEMs which have FIFOs too small
* to make real gains from PAUSE.
*/
if (gp->rx_fifo_sz <= (2 * 1024)) {
gp->rx_pause_off = gp->rx_pause_on = gp->rx_fifo_sz;
} else {
int max_frame = (gp->rx_buf_sz + 4 + 64) & ~63;
int off = (gp->rx_fifo_sz - (max_frame * 2));
int on = off - max_frame;
gp->rx_pause_off = off;
gp->rx_pause_on = on;
}
/* Configure the chip "burst" DMA mode & enable some
* HW bug fixes on Apple version
*/
cfg = 0;
if (gp->pdev->vendor == PCI_VENDOR_ID_APPLE)
cfg |= GREG_CFG_RONPAULBIT | GREG_CFG_ENBUG2FIX;
#if !defined(CONFIG_SPARC64) && !defined(CONFIG_ALPHA)
cfg |= GREG_CFG_IBURST;
#endif
cfg |= ((31 << 1) & GREG_CFG_TXDMALIM);
cfg |= ((31 << 6) & GREG_CFG_RXDMALIM);
writel(cfg, gp->regs + GREG_CFG);
/* If Infinite Burst didn't stick, then use different
* thresholds (and Apple bug fixes don't exist)
*/
if (!(readl(gp->regs + GREG_CFG) & GREG_CFG_IBURST)) {
cfg = ((2 << 1) & GREG_CFG_TXDMALIM);
cfg |= ((8 << 6) & GREG_CFG_RXDMALIM);
writel(cfg, gp->regs + GREG_CFG);
}
}
static int gem_check_invariants(struct gem *gp)
{
struct pci_dev *pdev = gp->pdev;
u32 mif_cfg;
/* On Apple's sungem, we can't rely on registers as the chip
* was been powered down by the firmware. The PHY is looked
* up later on.
*/
if (pdev->vendor == PCI_VENDOR_ID_APPLE) {
gp->phy_type = phy_mii_mdio0;
gp->tx_fifo_sz = readl(gp->regs + TXDMA_FSZ) * 64;
gp->rx_fifo_sz = readl(gp->regs + RXDMA_FSZ) * 64;
gp->swrst_base = 0;
mif_cfg = readl(gp->regs + MIF_CFG);
mif_cfg &= ~(MIF_CFG_PSELECT|MIF_CFG_POLL|MIF_CFG_BBMODE|MIF_CFG_MDI1);
mif_cfg |= MIF_CFG_MDI0;
writel(mif_cfg, gp->regs + MIF_CFG);
writel(PCS_DMODE_MGM, gp->regs + PCS_DMODE);
writel(MAC_XIFCFG_OE, gp->regs + MAC_XIFCFG);
/* We hard-code the PHY address so we can properly bring it out of
* reset later on, we can't really probe it at this point, though
* that isn't an issue.
*/
if (gp->pdev->device == PCI_DEVICE_ID_APPLE_K2_GMAC)
gp->mii_phy_addr = 1;
else
gp->mii_phy_addr = 0;
return 0;
}
mif_cfg = readl(gp->regs + MIF_CFG);
if (pdev->vendor == PCI_VENDOR_ID_SUN &&
pdev->device == PCI_DEVICE_ID_SUN_RIO_GEM) {
/* One of the MII PHYs _must_ be present
* as this chip has no gigabit PHY.
*/
if ((mif_cfg & (MIF_CFG_MDI0 | MIF_CFG_MDI1)) == 0) {
printk(KERN_ERR PFX "RIO GEM lacks MII phy, mif_cfg[%08x]\n",
mif_cfg);
return -1;
}
}
/* Determine initial PHY interface type guess. MDIO1 is the
* external PHY and thus takes precedence over MDIO0.
*/
if (mif_cfg & MIF_CFG_MDI1) {
gp->phy_type = phy_mii_mdio1;
mif_cfg |= MIF_CFG_PSELECT;
writel(mif_cfg, gp->regs + MIF_CFG);
} else if (mif_cfg & MIF_CFG_MDI0) {
gp->phy_type = phy_mii_mdio0;
mif_cfg &= ~MIF_CFG_PSELECT;
writel(mif_cfg, gp->regs + MIF_CFG);
} else {
gp->phy_type = phy_serialink;
}
if (gp->phy_type == phy_mii_mdio1 ||
gp->phy_type == phy_mii_mdio0) {
int i;
for (i = 0; i < 32; i++) {
gp->mii_phy_addr = i;
if (phy_read(gp, MII_BMCR) != 0xffff)
break;
}
if (i == 32) {
if (pdev->device != PCI_DEVICE_ID_SUN_GEM) {
printk(KERN_ERR PFX "RIO MII phy will not respond.\n");
return -1;
}
gp->phy_type = phy_serdes;
}
}
/* Fetch the FIFO configurations now too. */
gp->tx_fifo_sz = readl(gp->regs + TXDMA_FSZ) * 64;
gp->rx_fifo_sz = readl(gp->regs + RXDMA_FSZ) * 64;
if (pdev->vendor == PCI_VENDOR_ID_SUN) {
if (pdev->device == PCI_DEVICE_ID_SUN_GEM) {
if (gp->tx_fifo_sz != (9 * 1024) ||
gp->rx_fifo_sz != (20 * 1024)) {
printk(KERN_ERR PFX "GEM has bogus fifo sizes tx(%d) rx(%d)\n",
gp->tx_fifo_sz, gp->rx_fifo_sz);
return -1;
}
gp->swrst_base = 0;
} else {
if (gp->tx_fifo_sz != (2 * 1024) ||
gp->rx_fifo_sz != (2 * 1024)) {
printk(KERN_ERR PFX "RIO GEM has bogus fifo sizes tx(%d) rx(%d)\n",
gp->tx_fifo_sz, gp->rx_fifo_sz);
return -1;
}
gp->swrst_base = (64 / 4) << GREG_SWRST_CACHE_SHIFT;
}
}
return 0;
}
/* Must be invoked under gp->lock and gp->tx_lock. */
static void gem_reinit_chip(struct gem *gp)
{
/* Reset the chip */
gem_reset(gp);
/* Make sure ints are disabled */
gem_disable_ints(gp);
/* Allocate & setup ring buffers */
gem_init_rings(gp);
/* Configure pause thresholds */
gem_init_pause_thresholds(gp);
/* Init DMA & MAC engines */
gem_init_dma(gp);
gem_init_mac(gp);
}
/* Must be invoked with no lock held. */
static void gem_stop_phy(struct gem *gp, int wol)
{
u32 mifcfg;
unsigned long flags;
/* Let the chip settle down a bit, it seems that helps
* for sleep mode on some models
*/
msleep(10);
/* Make sure we aren't polling PHY status change. We
* don't currently use that feature though
*/
mifcfg = readl(gp->regs + MIF_CFG);
mifcfg &= ~MIF_CFG_POLL;
writel(mifcfg, gp->regs + MIF_CFG);
if (wol && gp->has_wol) {
unsigned char *e = &gp->dev->dev_addr[0];
u32 csr;
/* Setup wake-on-lan for MAGIC packet */
writel(MAC_RXCFG_HFE | MAC_RXCFG_SFCS | MAC_RXCFG_ENAB,
gp->regs + MAC_RXCFG);
writel((e[4] << 8) | e[5], gp->regs + WOL_MATCH0);
writel((e[2] << 8) | e[3], gp->regs + WOL_MATCH1);
writel((e[0] << 8) | e[1], gp->regs + WOL_MATCH2);
writel(WOL_MCOUNT_N | WOL_MCOUNT_M, gp->regs + WOL_MCOUNT);
csr = WOL_WAKECSR_ENABLE;
if ((readl(gp->regs + MAC_XIFCFG) & MAC_XIFCFG_GMII) == 0)
csr |= WOL_WAKECSR_MII;
writel(csr, gp->regs + WOL_WAKECSR);
} else {
writel(0, gp->regs + MAC_RXCFG);
(void)readl(gp->regs + MAC_RXCFG);
/* Machine sleep will die in strange ways if we
* dont wait a bit here, looks like the chip takes
* some time to really shut down
*/
msleep(10);
}
writel(0, gp->regs + MAC_TXCFG);
writel(0, gp->regs + MAC_XIFCFG);
writel(0, gp->regs + TXDMA_CFG);
writel(0, gp->regs + RXDMA_CFG);
if (!wol) {
spin_lock_irqsave(&gp->lock, flags);
spin_lock(&gp->tx_lock);
gem_reset(gp);
writel(MAC_TXRST_CMD, gp->regs + MAC_TXRST);
writel(MAC_RXRST_CMD, gp->regs + MAC_RXRST);
spin_unlock(&gp->tx_lock);
spin_unlock_irqrestore(&gp->lock, flags);
/* No need to take the lock here */
if (found_mii_phy(gp) && gp->phy_mii.def->ops->suspend)
gp->phy_mii.def->ops->suspend(&gp->phy_mii);
/* According to Apple, we must set the MDIO pins to this begnign
* state or we may 1) eat more current, 2) damage some PHYs
*/
writel(mifcfg | MIF_CFG_BBMODE, gp->regs + MIF_CFG);
writel(0, gp->regs + MIF_BBCLK);
writel(0, gp->regs + MIF_BBDATA);
writel(0, gp->regs + MIF_BBOENAB);
writel(MAC_XIFCFG_GMII | MAC_XIFCFG_LBCK, gp->regs + MAC_XIFCFG);
(void) readl(gp->regs + MAC_XIFCFG);
}
}
static int gem_do_start(struct net_device *dev)
{
struct gem *gp = dev->priv;
unsigned long flags;
spin_lock_irqsave(&gp->lock, flags);
spin_lock(&gp->tx_lock);
/* Enable the cell */
gem_get_cell(gp);
/* Init & setup chip hardware */
gem_reinit_chip(gp);
gp->running = 1;
if (gp->lstate == link_up) {
netif_carrier_on(gp->dev);
gem_set_link_modes(gp);
}
netif_wake_queue(gp->dev);
spin_unlock(&gp->tx_lock);
spin_unlock_irqrestore(&gp->lock, flags);
if (request_irq(gp->pdev->irq, gem_interrupt,
IRQF_SHARED, dev->name, (void *)dev)) {
printk(KERN_ERR "%s: failed to request irq !\n", gp->dev->name);
spin_lock_irqsave(&gp->lock, flags);
spin_lock(&gp->tx_lock);
gp->running = 0;
gem_reset(gp);
gem_clean_rings(gp);
gem_put_cell(gp);
spin_unlock(&gp->tx_lock);
spin_unlock_irqrestore(&gp->lock, flags);
return -EAGAIN;
}
return 0;
}
static void gem_do_stop(struct net_device *dev, int wol)
{
struct gem *gp = dev->priv;
unsigned long flags;
spin_lock_irqsave(&gp->lock, flags);
spin_lock(&gp->tx_lock);
gp->running = 0;
/* Stop netif queue */
netif_stop_queue(dev);
/* Make sure ints are disabled */
gem_disable_ints(gp);
/* We can drop the lock now */
spin_unlock(&gp->tx_lock);
spin_unlock_irqrestore(&gp->lock, flags);
/* If we are going to sleep with WOL */
gem_stop_dma(gp);
msleep(10);
if (!wol)
gem_reset(gp);
msleep(10);
/* Get rid of rings */
gem_clean_rings(gp);
/* No irq needed anymore */
free_irq(gp->pdev->irq, (void *) dev);
/* Cell not needed neither if no WOL */
if (!wol) {
spin_lock_irqsave(&gp->lock, flags);
gem_put_cell(gp);
spin_unlock_irqrestore(&gp->lock, flags);
}
}
static void gem_reset_task(void *data)
{
struct gem *gp = (struct gem *) data;
mutex_lock(&gp->pm_mutex);
netif_poll_disable(gp->dev);
spin_lock_irq(&gp->lock);
spin_lock(&gp->tx_lock);
if (gp->running == 0)
goto not_running;
if (gp->running) {
netif_stop_queue(gp->dev);
/* Reset the chip & rings */
gem_reinit_chip(gp);
if (gp->lstate == link_up)
gem_set_link_modes(gp);
netif_wake_queue(gp->dev);
}
not_running:
gp->reset_task_pending = 0;
spin_unlock(&gp->tx_lock);
spin_unlock_irq(&gp->lock);
netif_poll_enable(gp->dev);
mutex_unlock(&gp->pm_mutex);
}
static int gem_open(struct net_device *dev)
{
struct gem *gp = dev->priv;
int rc = 0;
mutex_lock(&gp->pm_mutex);
/* We need the cell enabled */
if (!gp->asleep)
rc = gem_do_start(dev);
gp->opened = (rc == 0);
mutex_unlock(&gp->pm_mutex);
return rc;
}
static int gem_close(struct net_device *dev)
{
struct gem *gp = dev->priv;
/* Note: we don't need to call netif_poll_disable() here because
* our caller (dev_close) already did it for us
*/
mutex_lock(&gp->pm_mutex);
gp->opened = 0;
if (!gp->asleep)
gem_do_stop(dev, 0);
mutex_unlock(&gp->pm_mutex);
return 0;
}
#ifdef CONFIG_PM
static int gem_suspend(struct pci_dev *pdev, pm_message_t state)
{
struct net_device *dev = pci_get_drvdata(pdev);
struct gem *gp = dev->priv;
unsigned long flags;
mutex_lock(&gp->pm_mutex);
netif_poll_disable(dev);
printk(KERN_INFO "%s: suspending, WakeOnLan %s\n",
dev->name,
(gp->wake_on_lan && gp->opened) ? "enabled" : "disabled");
/* Keep the cell enabled during the entire operation */
spin_lock_irqsave(&gp->lock, flags);
spin_lock(&gp->tx_lock);
gem_get_cell(gp);
spin_unlock(&gp->tx_lock);
spin_unlock_irqrestore(&gp->lock, flags);
/* If the driver is opened, we stop the MAC */
if (gp->opened) {
/* Stop traffic, mark us closed */
netif_device_detach(dev);
/* Switch off MAC, remember WOL setting */
gp->asleep_wol = gp->wake_on_lan;
gem_do_stop(dev, gp->asleep_wol);
} else
gp->asleep_wol = 0;
/* Mark us asleep */
gp->asleep = 1;
wmb();
/* Stop the link timer */
del_timer_sync(&gp->link_timer);
/* Now we release the mutex to not block the reset task who
* can take it too. We are marked asleep, so there will be no
* conflict here
*/
mutex_unlock(&gp->pm_mutex);
/* Wait for a pending reset task to complete */
while (gp->reset_task_pending)
yield();
flush_scheduled_work();
/* Shut the PHY down eventually and setup WOL */
gem_stop_phy(gp, gp->asleep_wol);
/* Make sure bus master is disabled */
pci_disable_device(gp->pdev);
/* Release the cell, no need to take a lock at this point since
* nothing else can happen now
*/
gem_put_cell(gp);
return 0;
}
static int gem_resume(struct pci_dev *pdev)
{
struct net_device *dev = pci_get_drvdata(pdev);
struct gem *gp = dev->priv;
unsigned long flags;
printk(KERN_INFO "%s: resuming\n", dev->name);
mutex_lock(&gp->pm_mutex);
/* Keep the cell enabled during the entire operation, no need to
* take a lock here tho since nothing else can happen while we are
* marked asleep
*/
gem_get_cell(gp);
/* Make sure PCI access and bus master are enabled */
if (pci_enable_device(gp->pdev)) {
printk(KERN_ERR "%s: Can't re-enable chip !\n",
dev->name);
/* Put cell and forget it for now, it will be considered as
* still asleep, a new sleep cycle may bring it back
*/
gem_put_cell(gp);
mutex_unlock(&gp->pm_mutex);
return 0;
}
pci_set_master(gp->pdev);
/* Reset everything */
gem_reset(gp);
/* Mark us woken up */
gp->asleep = 0;
wmb();
/* Bring the PHY back. Again, lock is useless at this point as
* nothing can be happening until we restart the whole thing
*/
gem_init_phy(gp);
/* If we were opened, bring everything back */
if (gp->opened) {
/* Restart MAC */
gem_do_start(dev);
/* Re-attach net device */
netif_device_attach(dev);
}
spin_lock_irqsave(&gp->lock, flags);
spin_lock(&gp->tx_lock);
/* If we had WOL enabled, the cell clock was never turned off during
* sleep, so we end up beeing unbalanced. Fix that here
*/
if (gp->asleep_wol)
gem_put_cell(gp);
/* This function doesn't need to hold the cell, it will be held if the
* driver is open by gem_do_start().
*/
gem_put_cell(gp);
spin_unlock(&gp->tx_lock);
spin_unlock_irqrestore(&gp->lock, flags);
netif_poll_enable(dev);
mutex_unlock(&gp->pm_mutex);
return 0;
}
#endif /* CONFIG_PM */
static struct net_device_stats *gem_get_stats(struct net_device *dev)
{
struct gem *gp = dev->priv;
struct net_device_stats *stats = &gp->net_stats;
spin_lock_irq(&gp->lock);
spin_lock(&gp->tx_lock);
/* I have seen this being called while the PM was in progress,
* so we shield against this
*/
if (gp->running) {
stats->rx_crc_errors += readl(gp->regs + MAC_FCSERR);
writel(0, gp->regs + MAC_FCSERR);
stats->rx_frame_errors += readl(gp->regs + MAC_AERR);
writel(0, gp->regs + MAC_AERR);
stats->rx_length_errors += readl(gp->regs + MAC_LERR);
writel(0, gp->regs + MAC_LERR);
stats->tx_aborted_errors += readl(gp->regs + MAC_ECOLL);
stats->collisions +=
(readl(gp->regs + MAC_ECOLL) +
readl(gp->regs + MAC_LCOLL));
writel(0, gp->regs + MAC_ECOLL);
writel(0, gp->regs + MAC_LCOLL);
}
spin_unlock(&gp->tx_lock);
spin_unlock_irq(&gp->lock);
return &gp->net_stats;
}
static void gem_set_multicast(struct net_device *dev)
{
struct gem *gp = dev->priv;
u32 rxcfg, rxcfg_new;
int limit = 10000;
spin_lock_irq(&gp->lock);
spin_lock(&gp->tx_lock);
if (!gp->running)
goto bail;
netif_stop_queue(dev);
rxcfg = readl(gp->regs + MAC_RXCFG);
rxcfg_new = gem_setup_multicast(gp);
#ifdef STRIP_FCS
rxcfg_new |= MAC_RXCFG_SFCS;
#endif
gp->mac_rx_cfg = rxcfg_new;
writel(rxcfg & ~MAC_RXCFG_ENAB, gp->regs + MAC_RXCFG);
while (readl(gp->regs + MAC_RXCFG) & MAC_RXCFG_ENAB) {
if (!limit--)
break;
udelay(10);
}
rxcfg &= ~(MAC_RXCFG_PROM | MAC_RXCFG_HFE);
rxcfg |= rxcfg_new;
writel(rxcfg, gp->regs + MAC_RXCFG);
netif_wake_queue(dev);
bail:
spin_unlock(&gp->tx_lock);
spin_unlock_irq(&gp->lock);
}
/* Jumbo-grams don't seem to work :-( */
#define GEM_MIN_MTU 68
#if 1
#define GEM_MAX_MTU 1500
#else
#define GEM_MAX_MTU 9000
#endif
static int gem_change_mtu(struct net_device *dev, int new_mtu)
{
struct gem *gp = dev->priv;
if (new_mtu < GEM_MIN_MTU || new_mtu > GEM_MAX_MTU)
return -EINVAL;
if (!netif_running(dev) || !netif_device_present(dev)) {
/* We'll just catch it later when the
* device is up'd or resumed.
*/
dev->mtu = new_mtu;
return 0;
}
mutex_lock(&gp->pm_mutex);
spin_lock_irq(&gp->lock);
spin_lock(&gp->tx_lock);
dev->mtu = new_mtu;
if (gp->running) {
gem_reinit_chip(gp);
if (gp->lstate == link_up)
gem_set_link_modes(gp);
}
spin_unlock(&gp->tx_lock);
spin_unlock_irq(&gp->lock);
mutex_unlock(&gp->pm_mutex);
return 0;
}
static void gem_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
{
struct gem *gp = dev->priv;
strcpy(info->driver, DRV_NAME);
strcpy(info->version, DRV_VERSION);
strcpy(info->bus_info, pci_name(gp->pdev));
}
static int gem_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
struct gem *gp = dev->priv;
if (gp->phy_type == phy_mii_mdio0 ||
gp->phy_type == phy_mii_mdio1) {
if (gp->phy_mii.def)
cmd->supported = gp->phy_mii.def->features;
else
cmd->supported = (SUPPORTED_10baseT_Half |
SUPPORTED_10baseT_Full);
/* XXX hardcoded stuff for now */
cmd->port = PORT_MII;
cmd->transceiver = XCVR_EXTERNAL;
cmd->phy_address = 0; /* XXX fixed PHYAD */
/* Return current PHY settings */
spin_lock_irq(&gp->lock);
cmd->autoneg = gp->want_autoneg;
cmd->speed = gp->phy_mii.speed;
cmd->duplex = gp->phy_mii.duplex;
cmd->advertising = gp->phy_mii.advertising;
/* If we started with a forced mode, we don't have a default
* advertise set, we need to return something sensible so
* userland can re-enable autoneg properly.
*/
if (cmd->advertising == 0)
cmd->advertising = cmd->supported;
spin_unlock_irq(&gp->lock);
} else { // XXX PCS ?
cmd->supported =
(SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
SUPPORTED_Autoneg);
cmd->advertising = cmd->supported;
cmd->speed = 0;
cmd->duplex = cmd->port = cmd->phy_address =
cmd->transceiver = cmd->autoneg = 0;
}
cmd->maxtxpkt = cmd->maxrxpkt = 0;
return 0;
}
static int gem_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
struct gem *gp = dev->priv;
/* Verify the settings we care about. */
if (cmd->autoneg != AUTONEG_ENABLE &&
cmd->autoneg != AUTONEG_DISABLE)
return -EINVAL;
if (cmd->autoneg == AUTONEG_ENABLE &&
cmd->advertising == 0)
return -EINVAL;
if (cmd->autoneg == AUTONEG_DISABLE &&
((cmd->speed != SPEED_1000 &&
cmd->speed != SPEED_100 &&
cmd->speed != SPEED_10) ||
(cmd->duplex != DUPLEX_HALF &&
cmd->duplex != DUPLEX_FULL)))
return -EINVAL;
/* Apply settings and restart link process. */
spin_lock_irq(&gp->lock);
gem_get_cell(gp);
gem_begin_auto_negotiation(gp, cmd);
gem_put_cell(gp);
spin_unlock_irq(&gp->lock);
return 0;
}
static int gem_nway_reset(struct net_device *dev)
{
struct gem *gp = dev->priv;
if (!gp->want_autoneg)
return -EINVAL;
/* Restart link process. */
spin_lock_irq(&gp->lock);
gem_get_cell(gp);
gem_begin_auto_negotiation(gp, NULL);
gem_put_cell(gp);
spin_unlock_irq(&gp->lock);
return 0;
}
static u32 gem_get_msglevel(struct net_device *dev)
{
struct gem *gp = dev->priv;
return gp->msg_enable;
}
static void gem_set_msglevel(struct net_device *dev, u32 value)
{
struct gem *gp = dev->priv;
gp->msg_enable = value;
}
/* Add more when I understand how to program the chip */
/* like WAKE_UCAST | WAKE_MCAST | WAKE_BCAST */
#define WOL_SUPPORTED_MASK (WAKE_MAGIC)
static void gem_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
{
struct gem *gp = dev->priv;
/* Add more when I understand how to program the chip */
if (gp->has_wol) {
wol->supported = WOL_SUPPORTED_MASK;
wol->wolopts = gp->wake_on_lan;
} else {
wol->supported = 0;
wol->wolopts = 0;
}
}
static int gem_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
{
struct gem *gp = dev->priv;
if (!gp->has_wol)
return -EOPNOTSUPP;
gp->wake_on_lan = wol->wolopts & WOL_SUPPORTED_MASK;
return 0;
}
static const struct ethtool_ops gem_ethtool_ops = {
.get_drvinfo = gem_get_drvinfo,
.get_link = ethtool_op_get_link,
.get_settings = gem_get_settings,
.set_settings = gem_set_settings,
.nway_reset = gem_nway_reset,
.get_msglevel = gem_get_msglevel,
.set_msglevel = gem_set_msglevel,
.get_wol = gem_get_wol,
.set_wol = gem_set_wol,
};
static int gem_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
struct gem *gp = dev->priv;
struct mii_ioctl_data *data = if_mii(ifr);
int rc = -EOPNOTSUPP;
unsigned long flags;
/* Hold the PM mutex while doing ioctl's or we may collide
* with power management.
*/
mutex_lock(&gp->pm_mutex);
spin_lock_irqsave(&gp->lock, flags);
gem_get_cell(gp);
spin_unlock_irqrestore(&gp->lock, flags);
switch (cmd) {
case SIOCGMIIPHY: /* Get address of MII PHY in use. */
data->phy_id = gp->mii_phy_addr;
/* Fallthrough... */
case SIOCGMIIREG: /* Read MII PHY register. */
if (!gp->running)
rc = -EAGAIN;
else {
data->val_out = __phy_read(gp, data->phy_id & 0x1f,
data->reg_num & 0x1f);
rc = 0;
}
break;
case SIOCSMIIREG: /* Write MII PHY register. */
if (!capable(CAP_NET_ADMIN))
rc = -EPERM;
else if (!gp->running)
rc = -EAGAIN;
else {
__phy_write(gp, data->phy_id & 0x1f, data->reg_num & 0x1f,
data->val_in);
rc = 0;
}
break;
};
spin_lock_irqsave(&gp->lock, flags);
gem_put_cell(gp);
spin_unlock_irqrestore(&gp->lock, flags);
mutex_unlock(&gp->pm_mutex);
return rc;
}
#if (!defined(__sparc__) && !defined(CONFIG_PPC_PMAC))
/* Fetch MAC address from vital product data of PCI ROM. */
static int find_eth_addr_in_vpd(void __iomem *rom_base, int len, unsigned char *dev_addr)
{
int this_offset;
for (this_offset = 0x20; this_offset < len; this_offset++) {
void __iomem *p = rom_base + this_offset;
int i;
if (readb(p + 0) != 0x90 ||
readb(p + 1) != 0x00 ||
readb(p + 2) != 0x09 ||
readb(p + 3) != 0x4e ||
readb(p + 4) != 0x41 ||
readb(p + 5) != 0x06)
continue;
this_offset += 6;
p += 6;
for (i = 0; i < 6; i++)
dev_addr[i] = readb(p + i);
return 1;
}
return 0;
}
static void get_gem_mac_nonobp(struct pci_dev *pdev, unsigned char *dev_addr)
{
size_t size;
void __iomem *p = pci_map_rom(pdev, &size);
if (p) {
int found;
found = readb(p) == 0x55 &&
readb(p + 1) == 0xaa &&
find_eth_addr_in_vpd(p, (64 * 1024), dev_addr);
pci_unmap_rom(pdev, p);
if (found)
return;
}
/* Sun MAC prefix then 3 random bytes. */
dev_addr[0] = 0x08;
dev_addr[1] = 0x00;
dev_addr[2] = 0x20;
get_random_bytes(dev_addr + 3, 3);
return;
}
#endif /* not Sparc and not PPC */
static int __devinit gem_get_device_address(struct gem *gp)
{
#if defined(__sparc__) || defined(CONFIG_PPC_PMAC)
struct net_device *dev = gp->dev;
#endif
#if defined(__sparc__)
struct pci_dev *pdev = gp->pdev;
struct pcidev_cookie *pcp = pdev->sysdata;
int use_idprom = 1;
if (pcp != NULL) {
unsigned char *addr;
int len;
addr = of_get_property(pcp->prom_node, "local-mac-address",
&len);
if (addr && len == 6) {
use_idprom = 0;
memcpy(dev->dev_addr, addr, 6);
}
}
if (use_idprom)
memcpy(dev->dev_addr, idprom->id_ethaddr, 6);
#elif defined(CONFIG_PPC_PMAC)
const unsigned char *addr;
addr = get_property(gp->of_node, "local-mac-address", NULL);
if (addr == NULL) {
printk("\n");
printk(KERN_ERR "%s: can't get mac-address\n", dev->name);
return -1;
}
memcpy(dev->dev_addr, addr, 6);
#else
get_gem_mac_nonobp(gp->pdev, gp->dev->dev_addr);
#endif
return 0;
}
static void gem_remove_one(struct pci_dev *pdev)
{
struct net_device *dev = pci_get_drvdata(pdev);
if (dev) {
struct gem *gp = dev->priv;
unregister_netdev(dev);
/* Stop the link timer */
del_timer_sync(&gp->link_timer);
/* We shouldn't need any locking here */
gem_get_cell(gp);
/* Wait for a pending reset task to complete */
while (gp->reset_task_pending)
yield();
flush_scheduled_work();
/* Shut the PHY down */
gem_stop_phy(gp, 0);
gem_put_cell(gp);
/* Make sure bus master is disabled */
pci_disable_device(gp->pdev);
/* Free resources */
pci_free_consistent(pdev,
sizeof(struct gem_init_block),
gp->init_block,
gp->gblock_dvma);
iounmap(gp->regs);
pci_release_regions(pdev);
free_netdev(dev);
pci_set_drvdata(pdev, NULL);
}
}
static int __devinit gem_init_one(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
static int gem_version_printed = 0;
unsigned long gemreg_base, gemreg_len;
struct net_device *dev;
struct gem *gp;
int i, err, pci_using_dac;
if (gem_version_printed++ == 0)
printk(KERN_INFO "%s", version);
/* Apple gmac note: during probe, the chip is powered up by
* the arch code to allow the code below to work (and to let
* the chip be probed on the config space. It won't stay powered
* up until the interface is brought up however, so we can't rely
* on register configuration done at this point.
*/
err = pci_enable_device(pdev);
if (err) {
printk(KERN_ERR PFX "Cannot enable MMIO operation, "
"aborting.\n");
return err;
}
pci_set_master(pdev);
/* Configure DMA attributes. */
/* All of the GEM documentation states that 64-bit DMA addressing
* is fully supported and should work just fine. However the
* front end for RIO based GEMs is different and only supports
* 32-bit addressing.
*
* For now we assume the various PPC GEMs are 32-bit only as well.
*/
if (pdev->vendor == PCI_VENDOR_ID_SUN &&
pdev->device == PCI_DEVICE_ID_SUN_GEM &&
!pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
pci_using_dac = 1;
} else {
err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
if (err) {
printk(KERN_ERR PFX "No usable DMA configuration, "
"aborting.\n");
goto err_disable_device;
}
pci_using_dac = 0;
}
gemreg_base = pci_resource_start(pdev, 0);
gemreg_len = pci_resource_len(pdev, 0);
if ((pci_resource_flags(pdev, 0) & IORESOURCE_IO) != 0) {
printk(KERN_ERR PFX "Cannot find proper PCI device "
"base address, aborting.\n");
err = -ENODEV;
goto err_disable_device;
}
dev = alloc_etherdev(sizeof(*gp));
if (!dev) {
printk(KERN_ERR PFX "Etherdev alloc failed, aborting.\n");
err = -ENOMEM;
goto err_disable_device;
}
SET_MODULE_OWNER(dev);
SET_NETDEV_DEV(dev, &pdev->dev);
gp = dev->priv;
err = pci_request_regions(pdev, DRV_NAME);
if (err) {
printk(KERN_ERR PFX "Cannot obtain PCI resources, "
"aborting.\n");
goto err_out_free_netdev;
}
gp->pdev = pdev;
dev->base_addr = (long) pdev;
gp->dev = dev;
gp->msg_enable = DEFAULT_MSG;
spin_lock_init(&gp->lock);
spin_lock_init(&gp->tx_lock);
mutex_init(&gp->pm_mutex);
init_timer(&gp->link_timer);
gp->link_timer.function = gem_link_timer;
gp->link_timer.data = (unsigned long) gp;
INIT_WORK(&gp->reset_task, gem_reset_task, gp);
gp->lstate = link_down;
gp->timer_ticks = 0;
netif_carrier_off(dev);
gp->regs = ioremap(gemreg_base, gemreg_len);
if (gp->regs == 0UL) {
printk(KERN_ERR PFX "Cannot map device registers, "
"aborting.\n");
err = -EIO;
goto err_out_free_res;
}
/* On Apple, we want a reference to the Open Firmware device-tree
* node. We use it for clock control.
*/
#ifdef CONFIG_PPC_PMAC
gp->of_node = pci_device_to_OF_node(pdev);
#endif
/* Only Apple version supports WOL afaik */
if (pdev->vendor == PCI_VENDOR_ID_APPLE)
gp->has_wol = 1;
/* Make sure cell is enabled */
gem_get_cell(gp);
/* Make sure everything is stopped and in init state */
gem_reset(gp);
/* Fill up the mii_phy structure (even if we won't use it) */
gp->phy_mii.dev = dev;
gp->phy_mii.mdio_read = _phy_read;
gp->phy_mii.mdio_write = _phy_write;
#ifdef CONFIG_PPC_PMAC
gp->phy_mii.platform_data = gp->of_node;
#endif
/* By default, we start with autoneg */
gp->want_autoneg = 1;
/* Check fifo sizes, PHY type, etc... */
if (gem_check_invariants(gp)) {
err = -ENODEV;
goto err_out_iounmap;
}
/* It is guaranteed that the returned buffer will be at least
* PAGE_SIZE aligned.
*/
gp->init_block = (struct gem_init_block *)
pci_alloc_consistent(pdev, sizeof(struct gem_init_block),
&gp->gblock_dvma);
if (!gp->init_block) {
printk(KERN_ERR PFX "Cannot allocate init block, "
"aborting.\n");
err = -ENOMEM;
goto err_out_iounmap;
}
if (gem_get_device_address(gp))
goto err_out_free_consistent;
dev->open = gem_open;
dev->stop = gem_close;
dev->hard_start_xmit = gem_start_xmit;
dev->get_stats = gem_get_stats;
dev->set_multicast_list = gem_set_multicast;
dev->do_ioctl = gem_ioctl;
dev->poll = gem_poll;
dev->weight = 64;
dev->ethtool_ops = &gem_ethtool_ops;
dev->tx_timeout = gem_tx_timeout;
dev->watchdog_timeo = 5 * HZ;
dev->change_mtu = gem_change_mtu;
dev->irq = pdev->irq;
dev->dma = 0;
#ifdef CONFIG_NET_POLL_CONTROLLER
dev->poll_controller = gem_poll_controller;
#endif
/* Set that now, in case PM kicks in now */
pci_set_drvdata(pdev, dev);
/* Detect & init PHY, start autoneg, we release the cell now
* too, it will be managed by whoever needs it
*/
gem_init_phy(gp);
spin_lock_irq(&gp->lock);
gem_put_cell(gp);
spin_unlock_irq(&gp->lock);
/* Register with kernel */
if (register_netdev(dev)) {
printk(KERN_ERR PFX "Cannot register net device, "
"aborting.\n");
err = -ENOMEM;
goto err_out_free_consistent;
}
printk(KERN_INFO "%s: Sun GEM (PCI) 10/100/1000BaseT Ethernet ",
dev->name);
for (i = 0; i < 6; i++)
printk("%2.2x%c", dev->dev_addr[i],
i == 5 ? ' ' : ':');
printk("\n");
if (gp->phy_type == phy_mii_mdio0 ||
gp->phy_type == phy_mii_mdio1)
printk(KERN_INFO "%s: Found %s PHY\n", dev->name,
gp->phy_mii.def ? gp->phy_mii.def->name : "no");
/* GEM can do it all... */
dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_LLTX;
if (pci_using_dac)
dev->features |= NETIF_F_HIGHDMA;
return 0;
err_out_free_consistent:
gem_remove_one(pdev);
err_out_iounmap:
gem_put_cell(gp);
iounmap(gp->regs);
err_out_free_res:
pci_release_regions(pdev);
err_out_free_netdev:
free_netdev(dev);
err_disable_device:
pci_disable_device(pdev);
return err;
}
static struct pci_driver gem_driver = {
.name = GEM_MODULE_NAME,
.id_table = gem_pci_tbl,
.probe = gem_init_one,
.remove = gem_remove_one,
#ifdef CONFIG_PM
.suspend = gem_suspend,
.resume = gem_resume,
#endif /* CONFIG_PM */
};
static int __init gem_init(void)
{
return pci_register_driver(&gem_driver);
}
static void __exit gem_cleanup(void)
{
pci_unregister_driver(&gem_driver);
}
module_init(gem_init);
module_exit(gem_cleanup);
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