Re: [PATCH 5/5] libata/ahci: Apply non-standard BAR fix for Loongson

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On 30/10/2019 13:53, Jiaxun Yang wrote:
Loongson is using BAR0 as AHCI registers BAR.

Signed-off-by: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx>
---
  drivers/ata/ahci.c | 7 +++++++
  1 file changed, 7 insertions(+)

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index dd92faf197d5..db3d7b94ad53 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -42,6 +42,7 @@ enum {
  	AHCI_PCI_BAR_CAVIUM	= 0,
  	AHCI_PCI_BAR_ENMOTUS	= 2,
  	AHCI_PCI_BAR_CAVIUM_GEN5	= 4,
+	AHCI_PCI_BAR_LOONGSON	= 0,

nit: these seem to be ordered by ascending BAR index

  	AHCI_PCI_BAR_STANDARD	= 5,
  };
@@ -575,6 +576,9 @@ static const struct pci_device_id ahci_pci_tbl[] = {
  	/* Enmotus */
  	{ PCI_DEVICE(0x1c44, 0x8000), board_ahci },
+ /* Loongson */
+	{ PCI_VDEVICE(LOONGSON, 0x7a08), board_ahci },
+
  	/* Generic, PCI class code for AHCI */
  	{ PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
  	  PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff, board_ahci },
@@ -1663,6 +1667,9 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
  			ahci_pci_bar = AHCI_PCI_BAR_CAVIUM;
  		if (pdev->device == 0xa084)
  			ahci_pci_bar = AHCI_PCI_BAR_CAVIUM_GEN5;
+	} else if (pdev->vendor == PCI_VENDOR_ID_LOONGSON) {
+		if (pdev->device == PCI_DEVICE_ID_LOONGSON_AHCI)
+			ahci_pci_bar = AHCI_PCI_BAR_LOONGSON;
  	}
/* acquire resources */





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