-----Original Message----- From: Andrew Cooks [mailto:acooks@xxxxxxxxx] Sent: Friday, March 01, 2013 3:26 AM To: acooks@xxxxxxxxx; joro@xxxxxxxxxx; xjtuychu@xxxxxxxxxxx; gm.ychu@xxxxxxxxx; alex.williamson@xxxxxxxxxx; bhelgaas@xxxxxxxxxx; jpiszcz@xxxxxxxxxxxxxxx; dwmw2@xxxxxxxxxxxxx Cc: open list:INTEL IOMMU (VT-d); open list; open list:PCI SUBSYSTEM Subject: [PATCH] Quirk to support Marvell 88SE91xx SATA controllers with Intel IOMMU. This is my third submitted patch to make Marvell 88SE91xx SATA controllers work when IOMMU is enabled.[1][2] What's changed: * Adopt David Woodhouse's terminology by referring to the quirky functions as 'ghost' functions. * Unmap ghost functions when device is detached from IOMMU. * Stub function for when CONFIG_PCI_QUIRKS is not enabled. The bad: * Still no AMD support. * The table of affected chip IDs is as complete as I can make it by googling for bug reports. This patch was generated against commit b0af9cd9aab60ceb17d3ebabb9fdf4ff0a99cf50, but will also apply cleanly to 3.7.10. -- Hi, Against 3.7.10: # patch -p1 < ../RFC-Fix-Intel-IOMMU-support-for-Marvell-88SE91xx-SATA-controllers..patch patching file drivers/iommu/intel-iommu.c patching file drivers/pci/quirks.c Hunk #1 succeeded at 3230 (offset 3 lines). patching file include/linux/pci.h # Recompile kernel, reboot.. Shutdown host, re-attach to Marvell Controller w/IOMMU. The host still failed to boot, dmesg/panic here: http://home.comcast.net/~jpiszcz/20130301/boot_failure.JPG (The root disk is /dev/sdc) I recompiled again with IOMMU off and it booted ok: # uname -a Linux host 3.7.10 #2 SMP Fri Mar 1 12:44:25 EST 2013 x86_64 GNU/Linux Here is the part of dmesg (what it looks like when it succeeds with IOMMU=off) [ 4.288113] input: American Megatrends Inc. Virtual Keyboard and Mouse as /devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0/input/input3 [ 4.289025] hid-generic 0003:046B:FF10.0001: input,hidraw0: USB HID v1.10 Keyboard [American Megatrends Inc. Virtual Keyboard and Mouse] on usb-0000:00:1a.1-2/input0 [ 4.305993] input: American Megatrends Inc. Virtual Keyboard and Mouse as /devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.1/input/input4 [ 4.307106] hid-generic 0003:046B:FF10.0002: input,hidraw1: USB HID v1.10 Mouse [American Megatrends Inc. Virtual Keyboard and Mouse] on usb-0000:00:1a.1-2/input1 [ 4.326481] ata6: SATA link down (SStatus 0 SControl 300) [ 4.327324] scsi 7:0:0:0: Direct-Access ATA INTEL SSDSC2MH25 PWG4 PQ: 0 ANSI: 5 [ 4.329953] sd 7:0:0:0: [sdc] 488397168 512-byte logical blocks: (250 GB/232 GiB) [ 4.330639] scsi 14:0:0:0: Processor Marvell 91xx Config 1.01 PQ: 0 ANSI: 5 [ 4.333276] sd 7:0:0:0: [sdc] Write Protect is off [ 4.334746] sd 7:0:0:0: [sdc] Mode Sense: 00 3a 00 00 [ 4.334921] sd 7:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA [ 4.345622] sdc: sdc1 sdc2 [ 4.347493] sd 7:0:0:0: [sdc] Attached SCSI disk Justin. -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
