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Commit 89b51cb5 authored by Alex Williamson's avatar Alex Williamson Committed by Bjorn Helgaas
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PCI: Add ACS quirk for Solarflare SFC9120 & SFC9140 



Solarflare confirms that these devices do not allow peer-to-peer between
functions.  Quirk them to allow IOMMU grouping to expose this isolation.

Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
Acked-by: default avatarRobert Stonehouse <rstonehouse@solarflare.com>
parent 5d8f4c9f

drivers/pci/quirks.c

+17 −0
Original line number Diff line number Diff line
@@ -3615,6 +3615,21 @@ static int pci_quirk_intel_pch_acs(struct pci_dev *dev, u16 acs_flags) 
	return acs_flags & ~flags ? 0 : 1;

}



static int pci_quirk_solarflare_acs(struct pci_dev *dev, u16 acs_flags)

{

	/*

	 * SV, TB, and UF are not relevant to multifunction endpoints.

	 *

	 * Solarflare indicates that peer-to-peer between functions is not

	 * possible, therefore RR, CR, and DT are not implemented.  Mask

	 * these out as if they were clear in the ACS capabilities register.

	 */

	acs_flags &= ~(PCI_ACS_SV | PCI_ACS_TB | PCI_ACS_RR |

		       PCI_ACS_CR | PCI_ACS_UF | PCI_ACS_DT);



	return acs_flags ? 0 : 1;

}



static const struct pci_dev_acs_enabled {

	u16 vendor;

	u16 device;
@@ -3626,6 +3641,8 @@ static const struct pci_dev_acs_enabled { 
	{ PCI_VENDOR_ID_ATI, 0x439d, pci_quirk_amd_sb_acs },

	{ PCI_VENDOR_ID_ATI, 0x4384, pci_quirk_amd_sb_acs },

	{ PCI_VENDOR_ID_ATI, 0x4399, pci_quirk_amd_sb_acs },

	{ PCI_VENDOR_ID_SOLARFLARE, 0x0903, pci_quirk_solarflare_acs },

	{ PCI_VENDOR_ID_SOLARFLARE, 0x0923, pci_quirk_solarflare_acs },

	{ PCI_VENDOR_ID_INTEL, PCI_ANY_ID, pci_quirk_intel_pch_acs },

	{ 0 }

};