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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Raymond Pang <RaymondPang-oc@zhaoxin.com>,
        Bjorn Helgaas <bhelgaas@google.com>
Subject: [PATCH 5.4 31/83] PCI: Add ACS quirk for Zhaoxin multi-function devices
Date:   Fri,  1 May 2020 15:23:10 +0200
Message-Id: <20200501131531.585369185@linuxfoundation.org>
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From: Raymond Pang <RaymondPang-oc@zhaoxin.com>

commit 0325837c51cb7c9a5bd3e354ac0c0cda0667d50e upstream.

Some Zhaoxin endpoints are implemented as multi-function devices without an
ACS capability, but they actually don't support peer-to-peer transactions.
Add ACS quirks to declare DMA isolation.

Link: https://lore.kernel.org/r/20200327091148.5190-3-RaymondPang-oc@zhaoxin.com
Signed-off-by: Raymond Pang <RaymondPang-oc@zhaoxin.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/pci/quirks.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -4759,6 +4759,10 @@ static const struct pci_dev_acs_enabled
 	{ PCI_VENDOR_ID_BROADCOM, 0xD714, pci_quirk_brcm_acs },
 	/* Amazon Annapurna Labs */
 	{ PCI_VENDOR_ID_AMAZON_ANNAPURNA_LABS, 0x0031, pci_quirk_al_acs },
+	/* Zhaoxin multi-function devices */
+	{ PCI_VENDOR_ID_ZHAOXIN, 0x3038, pci_quirk_mf_endpoint_acs },
+	{ PCI_VENDOR_ID_ZHAOXIN, 0x3104, pci_quirk_mf_endpoint_acs },
+	{ PCI_VENDOR_ID_ZHAOXIN, 0x9083, pci_quirk_mf_endpoint_acs },
 	{ 0 }
 };