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From: sathyanarayanan.kuppuswamy@linux.intel.com
To: bhelgaas@google.com
Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
	ashok.raj@intel.com, keith.busch@intel.com,
	sathyanarayanan.kuppuswamy@linux.intel.com
Subject: [PATCH v5 7/7] PCI: Skip Enhanced Allocation (EA) initialization for VF device
Date: Thu,  1 Aug 2019 17:06:04 -0700
Message-ID: <0418e168c33b9373af104ffda623f266d45e6f9f.1564702313.git.sathyanarayanan.kuppuswamy@linux.intel.com> (raw)
In-Reply-To: <cover.1564702313.git.sathyanarayanan.kuppuswamy@linux.intel.com>

From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>

As per PCIe r4.0, sec 9.3.6, VF must not implement Enhanced Allocation
Capability. So skip pci_ea_init() for virtual devices.

Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Keith Busch <keith.busch@intel.com>
Suggested-by: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
---
 drivers/pci/pci.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 29ed5ec1ac27..4b2844c3606c 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -3020,6 +3020,13 @@ void pci_ea_init(struct pci_dev *dev)
 	int offset;
 	int i;
 
+	/*
+	 * Per PCIe r4.0, sec 9.3.6, VF must not implement Enhanced
+	 * Allocation Capability.
+	 */
+	if (dev->is_virtfn)
+		return;
+
 	/* find PCI EA capability in list */
 	ea = pci_find_capability(dev, PCI_CAP_ID_EA);
 	if (!ea)
-- 
2.21.0


      parent reply index

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-02  0:05 [PATCH v5 0/7] Fix PF/VF dependency issue sathyanarayanan.kuppuswamy
2019-08-02  0:05 ` [PATCH v5 1/7] PCI/ATS: Fix pci_prg_resp_pasid_required() dependency issues sathyanarayanan.kuppuswamy
2019-08-12 20:04   ` Bjorn Helgaas
2019-08-12 20:20     ` sathyanarayanan kuppuswamy
2019-08-13  3:51       ` Bjorn Helgaas
2019-08-16 18:06         ` Kuppuswamy Sathyanarayanan
2019-08-02  0:05 ` [PATCH v5 2/7] PCI/ATS: Initialize PRI in pci_ats_init() sathyanarayanan.kuppuswamy
2019-08-12 20:04   ` Bjorn Helgaas
2019-08-12 21:35     ` sathyanarayanan kuppuswamy
2019-08-13  4:10       ` Bjorn Helgaas
2019-08-15  4:46   ` Bjorn Helgaas
2019-08-15 17:30     ` Kuppuswamy Sathyanarayanan
2019-08-16 17:31       ` Bjorn Helgaas
2019-08-02  0:06 ` [PATCH v5 3/7] PCI/ATS: Initialize PASID " sathyanarayanan.kuppuswamy
2019-08-12 20:04   ` Bjorn Helgaas
2019-08-15  4:48   ` Bjorn Helgaas
2019-08-15  4:56   ` Bjorn Helgaas
2019-08-15 17:31     ` Kuppuswamy Sathyanarayanan
2019-08-02  0:06 ` [PATCH v5 4/7] PCI/ATS: Add PRI support for PCIe VF devices sathyanarayanan.kuppuswamy
2019-08-12 20:04   ` Bjorn Helgaas
2019-08-12 21:40     ` sathyanarayanan kuppuswamy
2019-08-13  4:16   ` Bjorn Helgaas
2019-08-15 22:20   ` Bjorn Helgaas
2019-08-15 22:39     ` Kuppuswamy Sathyanarayanan
2019-08-19 14:15       ` Bjorn Helgaas
2019-08-19 22:53         ` Kuppuswamy Sathyanarayanan
2019-08-19 23:19           ` Bjorn Helgaas
2019-08-28 18:21             ` Kuppuswamy Sathyanarayanan
2019-08-28 18:57               ` Bjorn Helgaas
2019-08-02  0:06 ` [PATCH v5 5/7] PCI/ATS: Add PASID " sathyanarayanan.kuppuswamy
2019-08-12 20:05   ` Bjorn Helgaas
2019-08-13 22:19     ` Kuppuswamy Sathyanarayanan
2019-08-15  5:04       ` Bjorn Helgaas
2019-08-16  1:21         ` Kuppuswamy Sathyanarayanan
2019-08-02  0:06 ` [PATCH v5 6/7] PCI/ATS: Disable PF/VF ATS service independently sathyanarayanan.kuppuswamy
2019-08-02  0:06 ` sathyanarayanan.kuppuswamy [this message]

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