Date: Fri, 18 Mar 2011 14:06:12 +0000 (UTC) From: John Baldwin <jhb@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r219740 - head/sys/dev/pci Message-ID: <201103181406.p2IE6C0N068768@svn.freebsd.org>
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Author: jhb Date: Fri Mar 18 14:06:12 2011 New Revision: 219740 URL: http://svn.freebsd.org/changeset/base/219740 Log: Partially revert previous change. Drop the quirk to disable MSI for HT chipsets that do not have an HT slave at 0:0:0:0. The Linux quirk is actually specific to Nvidia chipsets and the check I had added was in the wrong place. Prodded by: nathanw Modified: head/sys/dev/pci/pci.c Modified: head/sys/dev/pci/pci.c ============================================================================== --- head/sys/dev/pci/pci.c Fri Mar 18 12:23:20 2011 (r219739) +++ head/sys/dev/pci/pci.c Fri Mar 18 14:06:12 2011 (r219740) @@ -236,7 +236,7 @@ struct pci_quirk pci_quirks[] = { struct devlist pci_devq; uint32_t pci_generation; uint32_t pci_numdevs = 0; -static int ht_chipset, pcie_chipset, pcix_chipset; +static int pcie_chipset, pcix_chipset; /* sysctl vars */ SYSCTL_NODE(_hw, OID_AUTO, pci, CTLFLAG_RD, 0, "PCI bus tuning parameters"); @@ -616,19 +616,9 @@ pci_read_extcap(device_t pcib, pcicfgreg /* Determine HT-specific capability type. */ val = REG(ptr + PCIR_HT_COMMAND, 2); - if ((val & 0xe000) == PCIM_HTCAP_SLAVE) { + if ((val & 0xe000) == PCIM_HTCAP_SLAVE) cfg->ht.ht_slave = ptr; - /* - * If device 0:0:0:0 is an HT slave, - * then this is an HT chipset and MSI - * should be enabled for HT devices. - */ - if (cfg->domain == 0 && cfg->bus == 0 && - cfg->slot == 0 && cfg->func == 0) - ht_chipset = 1; - } - #if defined(__i386__) || defined(__amd64__) || defined(__powerpc__) switch (val & PCIM_HTCMD_CAP_MASK) { case PCIM_HTCAP_MSI_MAPPING: @@ -1869,13 +1859,6 @@ pci_msi_device_blacklisted(device_t dev) q->type == PCI_QUIRK_DISABLE_MSI) return (1); } - - /* - * Blacklist HyperTransport devices if the device at 0:0:0:0 - * is not a HyperTransport slave. - */ - if (!ht_chipset && pci_find_extcap(dev, PCIY_HT, NULL) == 0) - return (1); return (0); }
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