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Date: Thu, 11 Sep 2014 16:38:40 +0800 From: Kweh Hock Leong <hock.leong.kweh@...el.com> To: "David S. Miller" <davem@...emloft.net>, Giuseppe Cavallaro <peppe.cavallaro@...com>, rayagond@...avyalabs.com Cc: Vince Bridgers <vbridgers2013@...il.com>, Srinivas Kandagatla <srinivas.kandagatla@...com>, Chen-Yu Tsai <wens@...e.org>, netdev@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>, Ong Boon Leong <boon.leong.ong@...el.com>, Kweh Hock Leong <hock.leong.kweh@...el.com> Subject: [PATCH v2 4/4] net: stmmac: add MSI support for Intel Quark X1000 From: "Kweh, Hock Leong" <hock.leong.kweh@...el.com> In Intel Quark SoC X1000, both of the Ethernet controllers support MSI interrupt handling. This patch enables them to use MSI interrupt servicing in stmmac_pci for Intel Quark X1000. Signed-off-by: Kweh, Hock Leong <hock.leong.kweh@...el.com> Reviewed-by: Ong, Boon Leong <boon.leong.ong@...el.com> --- drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c index 4fae23f..02861c3 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c @@ -51,6 +51,7 @@ struct platform_data { int fixed_burst; int burst_len; void (*rt_config)(int chip_id, struct pci_dev *pdev); + int support_msi; }; static struct platform_data platform_info[] = { @@ -68,6 +69,7 @@ static struct platform_data platform_info[] = { .fixed_burst = 0, .burst_len = DMA_AXI_BLEN_256, .rt_config = NULL, + .support_msi = 0, }, [CHIP_QUARK_X1000] = { .phy_addr = 1, @@ -83,6 +85,7 @@ static struct platform_data platform_info[] = { .fixed_burst = 1, .burst_len = DMA_AXI_BLEN_256, .rt_config = &quark_run_time_config, + .support_msi = 1, }, }; @@ -210,7 +213,7 @@ static int stmmac_pci_probe(struct pci_dev *pdev, plat_dat = devm_kzalloc(&pdev->dev, sizeof(*plat_dat), GFP_KERNEL); if (!plat_dat) { ret = -ENOMEM; - goto err_out; + goto err_out_alloc_failed; } plat_dat->mdio_bus_data = devm_kzalloc(&pdev->dev, @@ -218,7 +221,7 @@ static int stmmac_pci_probe(struct pci_dev *pdev, GFP_KERNEL); if (!plat_dat->mdio_bus_data) { ret = -ENOMEM; - goto err_out; + goto err_out_alloc_failed; } plat_dat->dma_cfg = devm_kzalloc(&pdev->dev, @@ -226,12 +229,15 @@ static int stmmac_pci_probe(struct pci_dev *pdev, GFP_KERNEL); if (!plat_dat->dma_cfg) { ret = -ENOMEM; - goto err_out; + goto err_out_alloc_failed; } ret = stmmac_default_data(plat_dat, id->driver_data, pdev); if (ret) - goto err_out; + goto err_out_alloc_failed; + + if (platform_info[id->driver_data].support_msi) + pci_enable_msi(pdev); priv = stmmac_dvr_probe(&pdev->dev, plat_dat, addr); if (IS_ERR(priv)) { @@ -249,6 +255,9 @@ static int stmmac_pci_probe(struct pci_dev *pdev, return 0; err_out: + if (platform_info[id->driver_data].support_msi) + pci_disable_msi(pdev); +err_out_alloc_failed: pci_clear_master(pdev); err_out_map_failed: pci_release_regions(pdev); @@ -272,6 +281,8 @@ static void stmmac_pci_remove(struct pci_dev *pdev) stmmac_dvr_remove(ndev); + if (pci_dev_msi_enabled(pdev)) + pci_disable_msi(pdev); pci_iounmap(pdev, priv->ioaddr); pci_release_regions(pdev); pci_disable_device(pdev); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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