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r8169: MSI support

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It is currently limited to the tested 0x8136 and 0x8168. 8169sb/8110sb ought
to handle it as well where they support MSI.

Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Cc: Edward Hsu <edward_hsu@realtek.com.tw>
Tester-Cc: Rolf Eike Beer <eike-kernel@sf-tec.de>
This commit is contained in:
Francois Romieu 2007-10-04 22:51:38 +02:00
parent f23e7fdad1
commit fbac58fcde
1 changed files with 44 additions and 6 deletions
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50
drivers/net/r8169.c
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@ -278,6 +278,7 @@ enum rtl_register_content {
TxDMAShift = 8, /* DMA burst value (0-7) is shift this many bits */
/* Config1 register p.24 */
MSIEnable = (1 << 5), /* Enable Message Signaled Interrupt */
PMEnable = (1 << 0), /* Power Management Enable */
/* Config2 register p. 25 */
@ -383,6 +384,7 @@ struct ring_info {
enum features {
RTL_FEATURE_WOL = (1 << 0),
RTL_FEATURE_MSI = (1 << 1),
};
struct rtl8169_private {
@ -1465,6 +1467,7 @@ static const struct rtl_cfg_info {
unsigned int align;
u16 intr_event;
u16 napi_event;
unsigned msi;
} rtl_cfg_infos [] = {
[RTL_CFG_0] = {
.hw_start = rtl_hw_start_8169,
@ -1472,7 +1475,8 @@ static const struct rtl_cfg_info {
.align = 0,
.intr_event = SYSErr | LinkChg | RxOverflow |
RxFIFOOver | TxErr | TxOK | RxOK | RxErr,
.napi_event = RxFIFOOver | TxErr | TxOK | RxOK | RxOverflow
.napi_event = RxFIFOOver | TxErr | TxOK | RxOK | RxOverflow,
.msi = 0
},
[RTL_CFG_1] = {
.hw_start = rtl_hw_start_8168,
@ -1480,7 +1484,8 @@ static const struct rtl_cfg_info {
.align = 8,
.intr_event = SYSErr | LinkChg | RxOverflow |
TxErr | TxOK | RxOK | RxErr,
.napi_event = TxErr | TxOK | RxOK | RxOverflow
.napi_event = TxErr | TxOK | RxOK | RxOverflow,
.msi = RTL_FEATURE_MSI
},
[RTL_CFG_2] = {
.hw_start = rtl_hw_start_8101,
@ -1488,10 +1493,39 @@ static const struct rtl_cfg_info {
.align = 8,
.intr_event = SYSErr | LinkChg | RxOverflow | PCSTimeout |
RxFIFOOver | TxErr | TxOK | RxOK | RxErr,
.napi_event = RxFIFOOver | TxErr | TxOK | RxOK | RxOverflow
.napi_event = RxFIFOOver | TxErr | TxOK | RxOK | RxOverflow,
.msi = RTL_FEATURE_MSI
}
};
/* Cfg9346_Unlock assumed. */
static unsigned rtl_try_msi(struct pci_dev *pdev, void __iomem *ioaddr,
const struct rtl_cfg_info *cfg)
{
unsigned msi = 0;
u8 cfg2;
cfg2 = RTL_R8(Config2) & ~MSIEnable;
if (cfg->msi) {
if (pci_enable_msi(pdev)) {
dev_info(&pdev->dev, "no MSI. Back to INTx.\n");
} else {
cfg2 |= MSIEnable;
msi = RTL_FEATURE_MSI;
}
}
RTL_W8(Config2, cfg2);
return msi;
}
static void rtl_disable_msi(struct pci_dev *pdev, struct rtl8169_private *tp)
{
if (tp->features & RTL_FEATURE_MSI) {
pci_disable_msi(pdev);
tp->features &= ~RTL_FEATURE_MSI;
}
}
static int __devinit
rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
{
@ -1627,6 +1661,7 @@ rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
RTL_W8(Cfg9346, Cfg9346_Unlock);
RTL_W8(Config1, RTL_R8(Config1) | PMEnable);
RTL_W8(Config5, RTL_R8(Config5) & PMEStatus);
tp->features |= rtl_try_msi(pdev, ioaddr, cfg);
RTL_W8(Cfg9346, Cfg9346_Lock);
if (RTL_R8(PHYstatus) & TBI_Enable) {
@ -1694,7 +1729,7 @@ rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
rc = register_netdev(dev);
if (rc < 0)
goto err_out_unmap_5;
goto err_out_msi_5;
pci_set_drvdata(pdev, dev);
@ -1717,7 +1752,8 @@ rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
out:
return rc;
err_out_unmap_5:
err_out_msi_5:
rtl_disable_msi(pdev, tp);
iounmap(ioaddr);
err_out_free_res_4:
pci_release_regions(pdev);
@ -1738,6 +1774,7 @@ static void __devexit rtl8169_remove_one(struct pci_dev *pdev)
flush_scheduled_work();
unregister_netdev(dev);
rtl_disable_msi(pdev, tp);
rtl8169_release_board(pdev, dev, tp->mmio_addr);
pci_set_drvdata(pdev, NULL);
}
@ -1781,7 +1818,8 @@ static int rtl8169_open(struct net_device *dev)
smp_mb();
retval = request_irq(dev->irq, rtl8169_interrupt, IRQF_SHARED,
retval = request_irq(dev->irq, rtl8169_interrupt,
(tp->features & RTL_FEATURE_MSI) ? 0 : IRQF_SHARED,
dev->name, dev);
if (retval < 0)
goto err_release_ring_2;