amd-xgbe: Add a hardware quirk for register definitions

A newer version of the hardware is using the same PCI ids for the network
device but has altered register definitions for determining the window
settings for the indirect PCS access.  Add support to check for this
hardware and if found use the new register values.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-common.h b/drivers/net/ethernet/amd/xgbe/xgbe-common.h
index 5b7ba25e006522a6143d6c73a9b8141a7ac76f85..8a280e7d66bddc998763288a5756b2ae6a7f70bc 100644 (file)
--- a/drivers/net/ethernet/amd/xgbe/xgbe-common.h
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-common.h
@@ -891,6 +891,8 @@
 #define PCS_V1_WINDOW_SELECT           0x03fc
 #define PCS_V2_WINDOW_DEF              0x9060
 #define PCS_V2_WINDOW_SELECT           0x9064
+#define PCS_V2_RV_WINDOW_DEF           0x1060
+#define PCS_V2_RV_WINDOW_SELECT                0x1064
 
 /* PCS register entry bit positions and sizes */
 #define PCS_V2_WINDOW_DEF_OFFSET_INDEX 6

diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-dev.c b/drivers/net/ethernet/amd/xgbe/xgbe-dev.c
index aaf0350076a90a1dcd91502b9ce8e4a81cff7174..c8e8a4a271ec961aa2212794b70d1e60265813a1 100644 (file)
--- a/drivers/net/ethernet/amd/xgbe/xgbe-dev.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-dev.c
@@ -1151,7 +1151,7 @@ static int xgbe_read_mmd_regs_v2(struct xgbe_prv_data *pdata, int prtad,
        offset = pdata->xpcs_window + (mmd_address & pdata->xpcs_window_mask);
 
        spin_lock_irqsave(&pdata->xpcs_lock, flags);
-       XPCS32_IOWRITE(pdata, PCS_V2_WINDOW_SELECT, index);
+       XPCS32_IOWRITE(pdata, pdata->xpcs_window_sel_reg, index);
        mmd_data = XPCS16_IOREAD(pdata, offset);
        spin_unlock_irqrestore(&pdata->xpcs_lock, flags);
 
@@ -1183,7 +1183,7 @@ static void xgbe_write_mmd_regs_v2(struct xgbe_prv_data *pdata, int prtad,
        offset = pdata->xpcs_window + (mmd_address & pdata->xpcs_window_mask);
 
        spin_lock_irqsave(&pdata->xpcs_lock, flags);
-       XPCS32_IOWRITE(pdata, PCS_V2_WINDOW_SELECT, index);
+       XPCS32_IOWRITE(pdata, pdata->xpcs_window_sel_reg, index);
        XPCS16_IOWRITE(pdata, offset, mmd_data);
        spin_unlock_irqrestore(&pdata->xpcs_lock, flags);
 }

diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-pci.c b/drivers/net/ethernet/amd/xgbe/xgbe-pci.c
index e76b7f65b805171ca81945efb75a44c3c1d7242d..c2730f15bd8b62d2e0487e4eef11f6518a476c39 100644 (file)
--- a/drivers/net/ethernet/amd/xgbe/xgbe-pci.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-pci.c
@@ -265,6 +265,7 @@ static int xgbe_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
        struct xgbe_prv_data *pdata;
        struct device *dev = &pdev->dev;
        void __iomem * const *iomap_table;
+       struct pci_dev *rdev;
        unsigned int ma_lo, ma_hi;
        unsigned int reg;
        int bar_mask;
@@ -326,8 +327,20 @@ static int xgbe_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
        if (netif_msg_probe(pdata))
                dev_dbg(dev, "xpcs_regs  = %p\n", pdata->xpcs_regs);
 
+       /* Set the PCS indirect addressing definition registers */
+       rdev = pci_get_domain_bus_and_slot(0, 0, PCI_DEVFN(0, 0));
+       if (rdev &&
+           (rdev->vendor == PCI_VENDOR_ID_AMD) && (rdev->device == 0x15d0)) {
+               pdata->xpcs_window_def_reg = PCS_V2_RV_WINDOW_DEF;
+               pdata->xpcs_window_sel_reg = PCS_V2_RV_WINDOW_SELECT;
+       } else {
+               pdata->xpcs_window_def_reg = PCS_V2_WINDOW_DEF;
+               pdata->xpcs_window_sel_reg = PCS_V2_WINDOW_SELECT;
+       }
+       pci_dev_put(rdev);
+
        /* Configure the PCS indirect addressing support */
-       reg = XPCS32_IOREAD(pdata, PCS_V2_WINDOW_DEF);
+       reg = XPCS32_IOREAD(pdata, pdata->xpcs_window_def_reg);
        pdata->xpcs_window = XPCS_GET_BITS(reg, PCS_V2_WINDOW_DEF, OFFSET);
        pdata->xpcs_window <<= 6;
        pdata->xpcs_window_size = XPCS_GET_BITS(reg, PCS_V2_WINDOW_DEF, SIZE);

diff --git a/drivers/net/ethernet/amd/xgbe/xgbe.h b/drivers/net/ethernet/amd/xgbe/xgbe.h
index f52a9bd05baca559d7afd6e1184010d103e1c08a..00108815b55eeb1417bd83bea4c9fbb7aa101fe1 100644 (file)
--- a/drivers/net/ethernet/amd/xgbe/xgbe.h
+++ b/drivers/net/ethernet/amd/xgbe/xgbe.h
@@ -955,6 +955,8 @@ struct xgbe_prv_data {
 
        /* XPCS indirect addressing lock */
        spinlock_t xpcs_lock;
+       unsigned int xpcs_window_def_reg;
+       unsigned int xpcs_window_sel_reg;
        unsigned int xpcs_window;
        unsigned int xpcs_window_size;
        unsigned int xpcs_window_mask;