Date: Fri, 27 Feb 2009 23:50:56 +0000 (UTC) From: Robert Noland <rnoland@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r189128 - head/sys/dev/drm Message-ID: <200902272350.n1RNouSm087241@svn.freebsd.org>
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Author: rnoland Date: Fri Feb 27 23:50:55 2009 New Revision: 189128 URL: http://svn.freebsd.org/changeset/base/189128 Log: Add a tuneable to allow disabling msi on drm at runtime. Suggested by: jhb@ MFC after: 2 weeks Modified: head/sys/dev/drm/drm_drv.c Modified: head/sys/dev/drm/drm_drv.c ============================================================================== --- head/sys/dev/drm/drm_drv.c Fri Feb 27 23:49:26 2009 (r189127) +++ head/sys/dev/drm/drm_drv.c Fri Feb 27 23:50:55 2009 (r189128) @@ -134,6 +134,9 @@ static struct cdevsw drm_cdevsw = { .d_flags = D_TRACKCLOSE }; +int drm_msi = 1; /* Enable by default. */ +TUNABLE_INT("hw.drm.msi", &drm_msi); + static struct drm_msi_blacklist_entry drm_msi_blacklist[] = { {0x8086, 0x2772}, /* Intel i945G */ \ {0x8086, 0x27A2}, /* Intel i945GM */ \ @@ -222,7 +225,8 @@ int drm_attach(device_t nbdev, drm_pci_i dev->pci_vendor = pci_get_vendor(dev->device); dev->pci_device = pci_get_device(dev->device); - if (!drm_msi_is_blacklisted(dev->pci_vendor, dev->pci_device)) { + if (drm_msi && + !drm_msi_is_blacklisted(dev->pci_vendor, dev->pci_device)) { msicount = pci_msi_count(dev->device); DRM_DEBUG("MSI count = %d\n", msicount); if (msicount > 1)
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