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authorJeffrey Huang <huangjw@broadcom.com>2015-11-05 16:25:49 -0500
committerDavid S. Miller <davem@davemloft.net>2015-11-05 16:33:08 -0500
commit11809490ac17810cff90c12e9f2f3e0303a72121 (patch)
tree33294bbeb2e8c5369ea2c298a26373e53b8bfdd9 /drivers/net
parent614388ce39f3d61ad7f95db65f409d35d5943616 (diff)
downloadlinux-11809490ac17810cff90c12e9f2f3e0303a72121.tar.bz2
bnxt_en: map CAG_REG_LEGACY_INT_STATUS_MASK to GRC window #4
In order to use offset 0x4014 for reading CAG interrupt status, the actual CAG register must be mapped to GRC bar0 window #4. Otherwise, the driver is reading garbage. This patch corrects this issue. Signed-off-by: Jeffrey Huang <huangjw@broadcom.com> Signed-off-by: Michael Chan <mchan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/ethernet/broadcom/bnxt/bnxt.c19
-rw-r--r--drivers/net/ethernet/broadcom/bnxt/bnxt.h4
2 files changed, 20 insertions, 3 deletions
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 6c2e0c622831..a62deff5a4ac 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -1292,8 +1292,6 @@ static inline int bnxt_has_work(struct bnxt *bp, struct bnxt_cp_ring_info *cpr)
return TX_CMP_VALID(txcmp, raw_cons);
}
-#define CAG_LEGACY_INT_STATUS 0x2014
-
static irqreturn_t bnxt_inta(int irq, void *dev_instance)
{
struct bnxt_napi *bnapi = dev_instance;
@@ -1305,7 +1303,7 @@ static irqreturn_t bnxt_inta(int irq, void *dev_instance)
prefetch(&cpr->cp_desc_ring[CP_RING(cons)][CP_IDX(cons)]);
if (!bnxt_has_work(bp, cpr)) {
- int_status = readl(bp->bar0 + CAG_LEGACY_INT_STATUS);
+ int_status = readl(bp->bar0 + BNXT_CAG_REG_LEGACY_INT_STATUS);
/* return if erroneous interrupt */
if (!(int_status & (0x10000 << cpr->cp_ring_struct.fw_ring_id)))
return IRQ_NONE;
@@ -4527,10 +4525,25 @@ static int bnxt_update_phy_setting(struct bnxt *bp)
return rc;
}
+/* Common routine to pre-map certain register block to different GRC window.
+ * A PF has 16 4K windows and a VF has 4 4K windows. However, only 15 windows
+ * in PF and 3 windows in VF that can be customized to map in different
+ * register blocks.
+ */
+static void bnxt_preset_reg_win(struct bnxt *bp)
+{
+ if (BNXT_PF(bp)) {
+ /* CAG registers map to GRC window #4 */
+ writel(BNXT_CAG_REG_BASE,
+ bp->bar0 + BNXT_GRCPF_REG_WINDOW_BASE_OUT + 12);
+ }
+}
+
static int __bnxt_open_nic(struct bnxt *bp, bool irq_re_init, bool link_re_init)
{
int rc = 0;
+ bnxt_preset_reg_win(bp);
netif_carrier_off(bp->dev);
if (irq_re_init) {
rc = bnxt_setup_int_mode(bp);
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index 5afe65d1316b..674bc5159b91 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -841,6 +841,10 @@ struct bnxt_queue_info {
u8 queue_profile;
};
+#define BNXT_GRCPF_REG_WINDOW_BASE_OUT 0x400
+#define BNXT_CAG_REG_LEGACY_INT_STATUS 0x4014
+#define BNXT_CAG_REG_BASE 0x300000
+
struct bnxt {
void __iomem *bar0;
void __iomem *bar1;