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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>
This commit is contained in:
Jeffrey Huang 2015-11-05 16:25:49 -05:00 committed by David S. Miller
parent 614388ce39
commit 11809490ac
2 changed files with 20 additions and 3 deletions
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19
drivers/net/ethernet/broadcom/bnxt/bnxt.c
View File

@ -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);

4
drivers/net/ethernet/broadcom/bnxt/bnxt.h
View File

@ -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;