From 8fbd962e39517dfb2bfd363eba4b51cdfa299593 Mon Sep 17 00:00:00 2001 From: Bruce Allan Date: Thu, 29 Oct 2009 13:42:41 +0000 Subject: e100: e100_phy_init() isolates selected PHY, causes 10 second boot delay A change in how PHYs are electrically isolated caused all PHYs to be isolated followed by reverting that isolation for the selected PHY. Unfortunately, isolating the selected PHY for even a short period of time can result in DHCP negotiation taking more than 10 seconds on certain embedded configurations delaying boot time as reported by Bernhard Kaindl. This patch reverts the change to how PHYs are isolated yet still works around the issue for 82552 needing the selected PHY's BMCR register to be written after the unused PHYs are isolated. This code is moved below the setting of nic->phy ID in order to do the 82552-specific workaround. Cc: Bernhard Kaindl Signed-off-by: Bruce Allan Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- drivers/net/e100.c | 26 +++++++++++++++++++------- 1 file changed, 19 insertions(+), 7 deletions(-) (limited to 'drivers/net/e100.c') diff --git a/drivers/net/e100.c b/drivers/net/e100.c index 679965c2bb86..d19b0845970a 100644 --- a/drivers/net/e100.c +++ b/drivers/net/e100.c @@ -1426,19 +1426,31 @@ static int e100_phy_init(struct nic *nic) } else DPRINTK(HW, DEBUG, "phy_addr = %d\n", nic->mii.phy_id); - /* Isolate all the PHY ids */ - for (addr = 0; addr < 32; addr++) - mdio_write(netdev, addr, MII_BMCR, BMCR_ISOLATE); - /* Select the discovered PHY */ - bmcr &= ~BMCR_ISOLATE; - mdio_write(netdev, nic->mii.phy_id, MII_BMCR, bmcr); - /* Get phy ID */ id_lo = mdio_read(netdev, nic->mii.phy_id, MII_PHYSID1); id_hi = mdio_read(netdev, nic->mii.phy_id, MII_PHYSID2); nic->phy = (u32)id_hi << 16 | (u32)id_lo; DPRINTK(HW, DEBUG, "phy ID = 0x%08X\n", nic->phy); + /* Select the phy and isolate the rest */ + for (addr = 0; addr < 32; addr++) { + if (addr != nic->mii.phy_id) { + mdio_write(netdev, addr, MII_BMCR, BMCR_ISOLATE); + } else if (nic->phy != phy_82552_v) { + bmcr = mdio_read(netdev, addr, MII_BMCR); + mdio_write(netdev, addr, MII_BMCR, + bmcr & ~BMCR_ISOLATE); + } + } + /* + * Workaround for 82552: + * Clear the ISOLATE bit on selected phy_id last (mirrored on all + * other phy_id's) using bmcr value from addr discovery loop above. + */ + if (nic->phy == phy_82552_v) + mdio_write(netdev, nic->mii.phy_id, MII_BMCR, + bmcr & ~BMCR_ISOLATE); + /* Handle National tx phys */ #define NCS_PHY_MODEL_MASK 0xFFF0FFFF if ((nic->phy & NCS_PHY_MODEL_MASK) == phy_nsc_tx) { -- cgit v1.2.3-55-g7522 From 98468efddb101f8a29af974101c17ba513b07be1 Mon Sep 17 00:00:00 2001 From: Roger Oksanen Date: Sun, 29 Nov 2009 17:17:29 -0800 Subject: e100: Use pci pool to work around GFP_ATOMIC order 5 memory allocation failure pci_alloc_consistent uses GFP_ATOMIC allocation that may fail on some systems with limited memory (Bug #14265). pci_pool_alloc allows waiting with GFP_KERNEL. Tested-by: Karol Lewandowski Signed-off-by: Roger Oksanen Signed-off-by: David S. Miller --- drivers/net/e100.c | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-) (limited to 'drivers/net/e100.c') diff --git a/drivers/net/e100.c b/drivers/net/e100.c index 3c29a20b751e..d269a68ce354 100644 --- a/drivers/net/e100.c +++ b/drivers/net/e100.c @@ -157,6 +157,7 @@ #include #include #include +#include #include #include #include @@ -602,6 +603,7 @@ struct nic { struct mem *mem; dma_addr_t dma_addr; + struct pci_pool *cbs_pool; dma_addr_t cbs_dma_addr; u8 adaptive_ifs; u8 tx_threshold; @@ -1793,9 +1795,7 @@ static void e100_clean_cbs(struct nic *nic) nic->cb_to_clean = nic->cb_to_clean->next; nic->cbs_avail++; } - pci_free_consistent(nic->pdev, - sizeof(struct cb) * nic->params.cbs.count, - nic->cbs, nic->cbs_dma_addr); + pci_pool_free(nic->cbs_pool, nic->cbs, nic->cbs_dma_addr); nic->cbs = NULL; nic->cbs_avail = 0; } @@ -1813,8 +1813,8 @@ static int e100_alloc_cbs(struct nic *nic) nic->cb_to_use = nic->cb_to_send = nic->cb_to_clean = NULL; nic->cbs_avail = 0; - nic->cbs = pci_alloc_consistent(nic->pdev, - sizeof(struct cb) * count, &nic->cbs_dma_addr); + nic->cbs = pci_pool_alloc(nic->cbs_pool, GFP_KERNEL, + &nic->cbs_dma_addr); if (!nic->cbs) return -ENOMEM; @@ -2841,7 +2841,11 @@ static int __devinit e100_probe(struct pci_dev *pdev, DPRINTK(PROBE, ERR, "Cannot register net device, aborting.\n"); goto err_out_free; } - + nic->cbs_pool = pci_pool_create(netdev->name, + nic->pdev, + nic->params.cbs.count * sizeof(struct cb), + sizeof(u32), + 0); DPRINTK(PROBE, INFO, "addr 0x%llx, irq %d, MAC addr %pM\n", (unsigned long long)pci_resource_start(pdev, use_io ? 1 : 0), pdev->irq, netdev->dev_addr); @@ -2871,6 +2875,7 @@ static void __devexit e100_remove(struct pci_dev *pdev) unregister_netdev(netdev); e100_free(nic); pci_iounmap(pdev, nic->csr); + pci_pool_destroy(nic->cbs_pool); free_netdev(netdev); pci_release_regions(pdev); pci_disable_device(pdev); -- cgit v1.2.3-55-g7522