| Message ID | 5683A335CC8BE1438C3C30C49DCC38DF637CED8E@IRSMSX102.ger.corp.intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
| Series | [v2] PCI: Add quirk for VCA NTB | expand |
On Tue, Sep 17, 2019 at 09:20:48AM +0000, Kitszel, PrzemyslawX wrote: > From 8ec717d913bba70e3e0dd783eebf355e0d64a159 Mon Sep 17 00:00:00 2001 > From: Slawomir Pawlowski <slawomir.pawlowski@intel.com> > Date: Fri, 21 Sep 2018 15:55:12 +0200 > Subject: [PATCH v2] PCI: Add quirk for VCA NTB > > Intel Visual Compute Accelerator (VCA) is a family of PCIe add-in devices > exposing computational units via Non Transparent Bridges (NTB, PEX 87xx). > > Similarly to MIC x200, there is need to add DMA aliases to allow buffer > access when IOMMU is enabled. > Following aliases are allowing host device and computational unit to access > each other. > Together those aliases marks whole VCA device as one IOMMU group. > > All possible slot numbers (0x20) are used, since we are unable to tell what > slot is used on other side. > This quirk is intended for both host and computational unit sides. > The VCA devices have up to 5 functions - 4 for DMA channels and one > additional. > > Signed-off-by: Slawomir Pawlowski <slawomir.pawlowski@intel.com> > Signed-off-by: Przemek Kitszel <przemyslawx.kitszel@intel.com> Applied to pci/virtualization for v5.5, thanks! > --- > Changes in v2: > - fix typos: s/sine/since/g > > drivers/pci/quirks.c | 32 ++++++++++++++++++++++++++++++++ > 1 file changed, 32 insertions(+) > > diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c > index ded60757a573..921a080146f3 100644 > --- a/drivers/pci/quirks.c > +++ b/drivers/pci/quirks.c > @@ -4062,6 +4062,38 @@ static void quirk_mic_x200_dma_alias(struct pci_dev *pdev) > DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2260, quirk_mic_x200_dma_alias); > DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2264, quirk_mic_x200_dma_alias); > > +/* > + * Intel Visual Compute Accelerator (VCA) is a family of PCIe add-in devices > + * exposing computational units via Non Transparent Bridges (NTB, PEX 87xx). > + * Similarly to MIC x200, there is need to add DMA aliases to allow buffer > + * access when IOMMU is enabled. > + * Following aliases are allowing host device and computational unit to access > + * each other. Together those aliases marks whole VCA device as one IOMMU group. > + * All possible slot numbers (0x20) are used, since we are unable to tell what > + * slot is used on other side. > + * This quirk is intended for both host and computational unit sides. > + * The VCA devices have up to 5 functions (4 for DMA channels and 1 additional). > + */ > +static void quirk_pex_vca_alias(struct pci_dev *pdev) > +{ > + const unsigned int num_pci_slots = 0x20; > + unsigned int slot; > + > + for (slot = 0; slot < num_pci_slots; slot++) { > + pci_add_dma_alias(pdev, PCI_DEVFN(slot, 0x0)); > + pci_add_dma_alias(pdev, PCI_DEVFN(slot, 0x1)); > + pci_add_dma_alias(pdev, PCI_DEVFN(slot, 0x2)); > + pci_add_dma_alias(pdev, PCI_DEVFN(slot, 0x3)); > + pci_add_dma_alias(pdev, PCI_DEVFN(slot, 0x4)); > + } > +} > +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2954, quirk_pex_vca_alias); > +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2955, quirk_pex_vca_alias); > +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2956, quirk_pex_vca_alias); > +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2958, quirk_pex_vca_alias); > +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2959, quirk_pex_vca_alias); > +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x295A, quirk_pex_vca_alias); > + > /* > * The IOMMU and interrupt controller on Broadcom Vulcan/Cavium ThunderX2 are > * associated not at the root bus, but at a bridge below. This quirk avoids > -- > 2.22.0 >
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index ded60757a573..921a080146f3 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -4062,6 +4062,38 @@ static void quirk_mic_x200_dma_alias(struct pci_dev *pdev) DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2260, quirk_mic_x200_dma_alias); DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2264, quirk_mic_x200_dma_alias); +/* + * Intel Visual Compute Accelerator (VCA) is a family of PCIe add-in devices + * exposing computational units via Non Transparent Bridges (NTB, PEX 87xx). + * Similarly to MIC x200, there is need to add DMA aliases to allow buffer + * access when IOMMU is enabled. + * Following aliases are allowing host device and computational unit to access + * each other. Together those aliases marks whole VCA device as one IOMMU group. + * All possible slot numbers (0x20) are used, since we are unable to tell what + * slot is used on other side. + * This quirk is intended for both host and computational unit sides. + * The VCA devices have up to 5 functions (4 for DMA channels and 1 additional). + */ +static void quirk_pex_vca_alias(struct pci_dev *pdev) +{ + const unsigned int num_pci_slots = 0x20; + unsigned int slot; + + for (slot = 0; slot < num_pci_slots; slot++) { + pci_add_dma_alias(pdev, PCI_DEVFN(slot, 0x0)); + pci_add_dma_alias(pdev, PCI_DEVFN(slot, 0x1)); + pci_add_dma_alias(pdev, PCI_DEVFN(slot, 0x2)); + pci_add_dma_alias(pdev, PCI_DEVFN(slot, 0x3)); + pci_add_dma_alias(pdev, PCI_DEVFN(slot, 0x4)); + } +} +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2954, quirk_pex_vca_alias); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2955, quirk_pex_vca_alias); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2956, quirk_pex_vca_alias); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2958, quirk_pex_vca_alias); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2959, quirk_pex_vca_alias); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x295A, quirk_pex_vca_alias); + /* * The IOMMU and interrupt controller on Broadcom Vulcan/Cavium ThunderX2 are * associated not at the root bus, but at a bridge below. This quirk avoids