qed: Fix BAR size split for some servers

Can't rely on pci config space to discover bar size,
as in some environments this returns a wrong, too large value.
Instead, rely on device register, which contains the value
provided by MFW at preboot.

Signed-off-by: Ariel Elior <Ariel.Elior@qlogic.com>
Signed-off-by: Manish Chopra <manish.chopra@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/qlogic/qed/qed_dev.c b/drivers/net/ethernet/qlogic/qed/qed_dev.c
index 803b190ccada97b30b28098666146f9d05ad1c54..817bbd5476ffb5956fca105686fc9029d06339ff 100644 (file)
--- a/drivers/net/ethernet/qlogic/qed/qed_dev.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_dev.c
@@ -1385,52 +1385,63 @@ err0:
        return rc;
 }
 
-static u32 qed_hw_bar_size(struct qed_dev *cdev,
-                          u8 bar_id)
+static u32 qed_hw_bar_size(struct qed_hwfn     *p_hwfn,
+                          u8                   bar_id)
 {
-       u32 size = pci_resource_len(cdev->pdev, (bar_id > 0) ? 2 : 0);
+       u32 bar_reg = (bar_id == 0 ? PGLUE_B_REG_PF_BAR0_SIZE
+                      : PGLUE_B_REG_PF_BAR1_SIZE);
+       u32 val = qed_rd(p_hwfn, p_hwfn->p_main_ptt, bar_reg);
 
-       return size / cdev->num_hwfns;
+       /* Get the BAR size(in KB) from hardware given val */
+       return 1 << (val + 15);
 }
 
 int qed_hw_prepare(struct qed_dev *cdev,
                   int personality)
 {
-       int rc, i;
+       struct qed_hwfn *p_hwfn = QED_LEADING_HWFN(cdev);
+       int rc;
 
        /* Store the precompiled init data ptrs */
        qed_init_iro_array(cdev);
 
        /* Initialize the first hwfn - will learn number of hwfns */
-       rc = qed_hw_prepare_single(&cdev->hwfns[0], cdev->regview,
+       rc = qed_hw_prepare_single(p_hwfn,
+                                  cdev->regview,
                                   cdev->doorbells, personality);
        if (rc)
                return rc;
 
-       personality = cdev->hwfns[0].hw_info.personality;
+       personality = p_hwfn->hw_info.personality;
 
        /* Initialize the rest of the hwfns */
-       for (i = 1; i < cdev->num_hwfns; i++) {
+       if (cdev->num_hwfns > 1) {
                void __iomem *p_regview, *p_doorbell;
+               u8 __iomem *addr;
+
+               /* adjust bar offset for second engine */
+               addr = cdev->regview + qed_hw_bar_size(p_hwfn, 0) / 2;
+               p_regview = addr;
 
-               p_regview =  cdev->regview +
-                            i * qed_hw_bar_size(cdev, 0);
-               p_doorbell = cdev->doorbells +
-                            i * qed_hw_bar_size(cdev, 1);
-               rc = qed_hw_prepare_single(&cdev->hwfns[i], p_regview,
+               /* adjust doorbell bar offset for second engine */
+               addr = cdev->doorbells + qed_hw_bar_size(p_hwfn, 1) / 2;
+               p_doorbell = addr;
+
+               /* prepare second hw function */
+               rc = qed_hw_prepare_single(&cdev->hwfns[1], p_regview,
                                           p_doorbell, personality);
+
+               /* in case of error, need to free the previously
+                * initiliazed hwfn 0.
+                */
                if (rc) {
-                       /* Cleanup previously initialized hwfns */
-                       while (--i >= 0) {
-                               qed_init_free(&cdev->hwfns[i]);
-                               qed_mcp_free(&cdev->hwfns[i]);
-                               qed_hw_hwfn_free(&cdev->hwfns[i]);
-                       }
-                       return rc;
+                       qed_init_free(p_hwfn);
+                       qed_mcp_free(p_hwfn);
+                       qed_hw_hwfn_free(p_hwfn);
                }
        }
 
-       return 0;
+       return rc;
 }
 
 void qed_hw_remove(struct qed_dev *cdev)

diff --git a/drivers/net/ethernet/qlogic/qed/qed_reg_addr.h b/drivers/net/ethernet/qlogic/qed/qed_reg_addr.h
index 7a5ce5914ace2287ec73afa20ed2d9d5eb328108..e8df12335a972cd3092cbefa8b675408446f06c9 100644 (file)
--- a/drivers/net/ethernet/qlogic/qed/qed_reg_addr.h
+++ b/drivers/net/ethernet/qlogic/qed/qed_reg_addr.h
@@ -363,4 +363,8 @@
                0x7 << 0)
 #define  MCP_REG_NVM_CFG4_FLASH_SIZE_SHIFT \
        0
+#define PGLUE_B_REG_PF_BAR0_SIZE \
+       0x2aae60UL
+#define PGLUE_B_REG_PF_BAR1_SIZE \
+       0x2aae64UL
 #endif