bnx2: Fix shutdown sequence

[ Upstream commit a8d9bc2e9f5d1c5a25e33cec096d2a1652d3fd52 ]

The pci shutdown handler added in:

    bnx2: Add pci shutdown handler
    commit 25bfb1dd4ba3b2d9a49ce9d9b0cd7be1840e15ed

created a shutdown down sequence without chip reset if the device was
never brought up.  This can cause the firmware to shutdown the PHY
prematurely and cause MMIO read cycles to be unresponsive.  On some
systems, it may generate NMI in the bnx2's pci shutdown handler.

The fix is to tell the firmware not to shutdown the PHY if there was
no prior chip reset.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>

diff --git a/drivers/net/ethernet/broadcom/bnx2.c b/drivers/net/ethernet/broadcom/bnx2.c
index e838a3f..8f9e76d 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnx2.c
+++ b/drivers/net/ethernet/broadcom/bnx2.c
@@ -2490,6 +2490,7 @@ bnx2_fw_sync(struct bnx2 *bp, u32 msg_data, int ack, int silent)
 
        bp->fw_wr_seq++;
        msg_data |= bp->fw_wr_seq;
+       bp->fw_last_msg = msg_data;
 
        bnx2_shmem_wr(bp, BNX2_DRV_MB, msg_data);
 
@@ -3982,8 +3983,23 @@ bnx2_setup_wol(struct bnx2 *bp)
                        wol_msg = BNX2_DRV_MSG_CODE_SUSPEND_NO_WOL;
        }
 
-       if (!(bp->flags & BNX2_FLAG_NO_WOL))
-               bnx2_fw_sync(bp, BNX2_DRV_MSG_DATA_WAIT3 | wol_msg, 1, 0);
+       if (!(bp->flags & BNX2_FLAG_NO_WOL)) {
+               u32 val;
+
+               wol_msg |= BNX2_DRV_MSG_DATA_WAIT3;
+               if (bp->fw_last_msg || BNX2_CHIP(bp) != BNX2_CHIP_5709) {
+                       bnx2_fw_sync(bp, wol_msg, 1, 0);
+                       return;
+               }
+               /* Tell firmware not to power down the PHY yet, otherwise
+                * the chip will take a long time to respond to MMIO reads.
+                */
+               val = bnx2_shmem_rd(bp, BNX2_PORT_FEATURE);
+               bnx2_shmem_wr(bp, BNX2_PORT_FEATURE,
+                             val | BNX2_PORT_FEATURE_ASF_ENABLED);
+               bnx2_fw_sync(bp, wol_msg, 1, 0);
+               bnx2_shmem_wr(bp, BNX2_PORT_FEATURE, val);
+       }
 
 }
 
@@ -4015,9 +4031,22 @@ bnx2_set_power_state(struct bnx2 *bp, pci_power_t state)
 
                        if (bp->wol)
                                pci_set_power_state(bp->pdev, PCI_D3hot);
-               } else {
-                       pci_set_power_state(bp->pdev, PCI_D3hot);
+                       break;
+
+               }
+               if (!bp->fw_last_msg && BNX2_CHIP(bp) == BNX2_CHIP_5709) {
+                       u32 val;
+
+                       /* Tell firmware not to power down the PHY yet,
+                        * otherwise the other port may not respond to
+                        * MMIO reads.
+                        */
+                       val = bnx2_shmem_rd(bp, BNX2_BC_STATE_CONDITION);
+                       val &= ~BNX2_CONDITION_PM_STATE_MASK;
+                       val |= BNX2_CONDITION_PM_STATE_UNPREP;
+                       bnx2_shmem_wr(bp, BNX2_BC_STATE_CONDITION, val);
                }
+               pci_set_power_state(bp->pdev, PCI_D3hot);
 
                /* No more memory access after this point until
                 * device is brought back to D0.

diff --git a/drivers/net/ethernet/broadcom/bnx2.h b/drivers/net/ethernet/broadcom/bnx2.h
index 18cb2d2..0eb2a65 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnx2.h
+++ b/drivers/net/ethernet/broadcom/bnx2.h
@@ -6890,6 +6890,7 @@ struct bnx2 {
 
        u16                     fw_wr_seq;
        u16                     fw_drv_pulse_wr_seq;
+       u32                     fw_last_msg;
 
        int                     rx_max_ring;
        int                     rx_ring_size;
@@ -7396,6 +7397,10 @@ struct bnx2_rv2p_fw_file {
 #define BNX2_CONDITION_MFW_RUN_NCSI             0x00006000
 #define BNX2_CONDITION_MFW_RUN_NONE             0x0000e000
 #define BNX2_CONDITION_MFW_RUN_MASK             0x0000e000
+#define BNX2_CONDITION_PM_STATE_MASK            0x00030000
+#define BNX2_CONDITION_PM_STATE_FULL            0x00030000
+#define BNX2_CONDITION_PM_STATE_PREP            0x00020000
+#define BNX2_CONDITION_PM_STATE_UNPREP          0x00010000
 
 #define BNX2_BC_STATE_DEBUG_CMD                        0x1dc
 #define BNX2_BC_STATE_BC_DBG_CMD_SIGNATURE      0x42440000