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r8169: don't request firmware when there's no userspace.

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The firmware is cached during the first successfull call to open() and
released once the network device is unregistered. The driver uses the
cached firmware between open() and unregister_netdev().

So far the firmware is optional : a failure to load the firmware does
not prevent open() to success. It is thus necessary to 1) unregister
all 816x / 810[23] devices and 2) force a driver probe to issue a new
firmware load.

Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Fixed-by: Ciprian Docan <docan@eden.rutgers.edu>
Cc: Realtek linux nic maintainers <nic_swsd@realtek.com>
This commit is contained in:
François Romieu 2011-04-24 17:38:48 +02:00 committed by Francois romieu
parent 0b0dc0f17f
commit 953a12cc28
1 changed files with 71 additions and 28 deletions
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99
drivers/net/r8169.c
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@ -170,6 +170,16 @@ static const struct {
};
#undef _R
static const struct rtl_firmware_info {
int mac_version;
const char *fw_name;
} rtl_firmware_infos[] = {
{ .mac_version = RTL_GIGA_MAC_VER_25, .fw_name = FIRMWARE_8168D_1 },
{ .mac_version = RTL_GIGA_MAC_VER_26, .fw_name = FIRMWARE_8168D_2 },
{ .mac_version = RTL_GIGA_MAC_VER_29, .fw_name = FIRMWARE_8105E_1 },
{ .mac_version = RTL_GIGA_MAC_VER_30, .fw_name = FIRMWARE_8105E_1 }
};
enum cfg_version {
RTL_CFG_0 = 0x00,
RTL_CFG_1,
@ -565,6 +575,7 @@ struct rtl8169_private {
u32 saved_wolopts;
const struct firmware *fw;
#define RTL_FIRMWARE_UNKNOWN ERR_PTR(-EAGAIN);
};
MODULE_AUTHOR("Realtek and the Linux r8169 crew <netdev@vger.kernel.org>");
@ -1789,25 +1800,26 @@ rtl_phy_write_fw(struct rtl8169_private *tp, const struct firmware *fw)
static void rtl_release_firmware(struct rtl8169_private *tp)
{
release_firmware(tp->fw);
tp->fw = NULL;
if (!IS_ERR_OR_NULL(tp->fw))
release_firmware(tp->fw);
tp->fw = RTL_FIRMWARE_UNKNOWN;
}
static int rtl_apply_firmware(struct rtl8169_private *tp, const char *fw_name)
static void rtl_apply_firmware(struct rtl8169_private *tp)
{
const struct firmware **fw = &tp->fw;
int rc = !*fw;
if (rc) {
rc = request_firmware(fw, fw_name, &tp->pci_dev->dev);
if (rc < 0)
goto out;
}
const struct firmware *fw = tp->fw;
/* TODO: release firmware once rtl_phy_write_fw signals failures. */
rtl_phy_write_fw(tp, *fw);
out:
return rc;
if (!IS_ERR_OR_NULL(fw))
rtl_phy_write_fw(tp, fw);
}
static void rtl_apply_firmware_cond(struct rtl8169_private *tp, u8 reg, u16 val)
{
if (rtl_readphy(tp, reg) != val)
netif_warn(tp, hw, tp->dev, "chipset not ready for firmware\n");
else
rtl_apply_firmware(tp);
}
static void rtl8169s_hw_phy_config(struct rtl8169_private *tp)
@ -2246,10 +2258,8 @@ static void rtl8168d_1_hw_phy_config(struct rtl8169_private *tp)
rtl_writephy(tp, 0x1f, 0x0005);
rtl_writephy(tp, 0x05, 0x001b);
if ((rtl_readphy(tp, 0x06) != 0xbf00) ||
(rtl_apply_firmware(tp, FIRMWARE_8168D_1) < 0)) {
netif_warn(tp, probe, tp->dev, "unable to apply firmware patch\n");
}
rtl_apply_firmware_cond(tp, MII_EXPANSION, 0xbf00);
rtl_writephy(tp, 0x1f, 0x0000);
}
@ -2351,10 +2361,8 @@ static void rtl8168d_2_hw_phy_config(struct rtl8169_private *tp)
rtl_writephy(tp, 0x1f, 0x0005);
rtl_writephy(tp, 0x05, 0x001b);
if ((rtl_readphy(tp, 0x06) != 0xb300) ||
(rtl_apply_firmware(tp, FIRMWARE_8168D_2) < 0)) {
netif_warn(tp, probe, tp->dev, "unable to apply firmware patch\n");
}
rtl_apply_firmware_cond(tp, MII_EXPANSION, 0xb300);
rtl_writephy(tp, 0x1f, 0x0000);
}
@ -2474,8 +2482,7 @@ static void rtl8105e_hw_phy_config(struct rtl8169_private *tp)
rtl_writephy(tp, 0x18, 0x0310);
msleep(100);
if (rtl_apply_firmware(tp, FIRMWARE_8105E_1) < 0)
netif_warn(tp, probe, tp->dev, "unable to apply firmware patch\n");
rtl_apply_firmware(tp);
rtl_writephy_batch(tp, phy_reg_init, ARRAY_SIZE(phy_reg_init));
}
@ -3237,6 +3244,8 @@ rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
tp->timer.data = (unsigned long) dev;
tp->timer.function = rtl8169_phy_timer;
tp->fw = RTL_FIRMWARE_UNKNOWN;
rc = register_netdev(dev);
if (rc < 0)
goto err_out_msi_4;
@ -3288,10 +3297,10 @@ static void __devexit rtl8169_remove_one(struct pci_dev *pdev)
cancel_delayed_work_sync(&tp->task);
rtl_release_firmware(tp);
unregister_netdev(dev);
rtl_release_firmware(tp);
if (pci_dev_run_wake(pdev))
pm_runtime_get_noresume(&pdev->dev);
@ -3303,6 +3312,37 @@ static void __devexit rtl8169_remove_one(struct pci_dev *pdev)
pci_set_drvdata(pdev, NULL);
}
static void rtl_request_firmware(struct rtl8169_private *tp)
{
int i;
/* Return early if the firmware is already loaded / cached. */
if (!IS_ERR(tp->fw))
goto out;
for (i = 0; i < ARRAY_SIZE(rtl_firmware_infos); i++) {
const struct rtl_firmware_info *info = rtl_firmware_infos + i;
if (info->mac_version == tp->mac_version) {
const char *name = info->fw_name;
int rc;
rc = request_firmware(&tp->fw, name, &tp->pci_dev->dev);
if (rc < 0) {
netif_warn(tp, ifup, tp->dev, "unable to load "
"firmware patch %s (%d)\n", name, rc);
goto out_disable_request_firmware;
}
goto out;
}
}
out_disable_request_firmware:
tp->fw = NULL;
out:
return;
}
static int rtl8169_open(struct net_device *dev)
{
struct rtl8169_private *tp = netdev_priv(dev);
@ -3334,11 +3374,13 @@ static int rtl8169_open(struct net_device *dev)
smp_mb();
rtl_request_firmware(tp);
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;
goto err_release_fw_2;
napi_enable(&tp->napi);
@ -3359,7 +3401,8 @@ static int rtl8169_open(struct net_device *dev)
out:
return retval;
err_release_ring_2:
err_release_fw_2:
rtl_release_firmware(tp);
rtl8169_rx_clear(tp);
err_free_rx_1:
dma_free_coherent(&pdev->dev, R8169_RX_RING_BYTES, tp->RxDescArray,