Add pci quirk for hisilicon PCI Network Processor devices 5896.
The size of the unused BAR3 is set as 265T wrongly. This patch disalbes
this bar.
Signed-off-by: Xiongfeng Wang <wangxiongfeng2@xxxxxxxxxx>
---
drivers/pci/quirks.c | 29 +++++++++++++++++++++++++++++
include/linux/pci_ids.h | 1 +
2 files changed, 30 insertions(+)
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 4937a08..7dfb272 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -5431,3 +5431,32 @@ static void quirk_reset_lenovo_thinkpad_p50_nvgpu(struct pci_dev *pdev)
DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_NVIDIA, 0x13b1,
PCI_CLASS_DISPLAY_VGA, 8,
quirk_reset_lenovo_thinkpad_p50_nvgpu);
+
+static void quirk_hisi_fixup_np_class(struct pci_dev *pdev)
+{
+ u32 class = pdev->class;
+
+ pdev->class = PCI_BASE_CLASS_NETWORK << 8;
+ pci_info(pdev, "PCI class overriden (%#08x -> %#08x)\n",
+ class, pdev->class);
+}
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_HUAWEI, PCI_DEVICE_ID_HISI_5896,
+ quirk_hisi_fixup_np_class);
+
+/*
+ * Hisilicon NP devices 5896 BAR3 size is misreported as 256T. Actually, this
+ * BAR is unused, so let's disable it.
+ */
+#define HISI_5896_WRONG_BAR 3
+static void quirk_hisi_fixup_np_bar(struct pci_dev *pdev)
+{
+ struct resource *r = &pdev->resource[HISI_5896_WRONG_BAR];
+
+ r->start = 0;
+ r->end = 0;
+ r->flags = 0;
+
+ pci_info(pdev, "disable BAR %d\n", HISI_5896_WRONG_BAR);
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_HUAWEI, PCI_DEVICE_ID_HISI_5896,
+ quirk_hisi_fixup_np_bar);
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 2302d133..56e2b91 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -2558,6 +2558,7 @@
#define PCI_DEVICE_ID_KORENIX_JETCARDF3 0x17ff
#define PCI_VENDOR_ID_HUAWEI 0x19e5
+#define PCI_DEVICE_ID_HISI_5896 0x5896 /* Hisilicon NP devices 5896 */
#define PCI_VENDOR_ID_NETRONOME 0x19ee
#define PCI_DEVICE_ID_NETRONOME_NFP4000 0x4000
--
1.7.12.4
