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Date: Sun, 22 May 2011 23:11:26 +0300
From: "Dmitry Kravkov" <dmitry@...adcom.com>
To: "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
"David Miller" <davem@...emloft.net>
cc: "Eilon Greenstein" <eilong@...adcom.com>
Subject: [PATCH net-2.6 4/4] bnx2x: allow device properly initialize
after hotplug
Signed-off-by: Dmitry Kravkov <dmitry@...adcom.com>
Signed-off-by: Eilon Greenstein <eilong@...adcom.com>
---
drivers/net/bnx2x/bnx2x_main.c | 67 ++++++++++++++-------------------------
1 files changed, 24 insertions(+), 43 deletions(-)
diff --git a/drivers/net/bnx2x/bnx2x_main.c b/drivers/net/bnx2x/bnx2x_main.c
index 58e30a2..8bfd857 100644
--- a/drivers/net/bnx2x/bnx2x_main.c
+++ b/drivers/net/bnx2x/bnx2x_main.c
@@ -7450,51 +7450,35 @@ static inline void bnx2x_mcp_wait_one(struct bnx2x *bp)
msleep(MCP_ONE_TIMEOUT);
}
-static int bnx2x_reset_mcp_comp(struct bnx2x *bp, u32 magic_val)
+/*
+ * initializes bp->common.shmem_base and waits for validity signature to appear
+ */
+static int bnx2x_init_shmem(struct bnx2x *bp)
{
- u32 shmem, cnt, validity_offset, val;
- int rc = 0;
-
- msleep(100);
+ int cnt = 0;
+ u32 val = 0;
- /* Get shmem offset */
- shmem = REG_RD(bp, MISC_REG_SHARED_MEM_ADDR);
- if (shmem == 0) {
- BNX2X_ERR("Shmem 0 return failure\n");
- rc = -ENOTTY;
- goto exit_lbl;
- }
+ do {
+ bp->common.shmem_base = REG_RD(bp, MISC_REG_SHARED_MEM_ADDR);
+ if (bp->common.shmem_base) {
+ val = SHMEM_RD(bp, validity_map[BP_PORT(bp)]);
+ if (val & SHR_MEM_VALIDITY_MB)
+ return 0;
+ }
- validity_offset = offsetof(struct shmem_region, validity_map[0]);
+ bnx2x_mcp_wait_one(bp);
- /* Wait for MCP to come up */
- for (cnt = 0; cnt < (MCP_TIMEOUT / MCP_ONE_TIMEOUT); cnt++) {
- /* TBD: its best to check validity map of last port.
- * currently checks on port 0.
- */
- val = REG_RD(bp, shmem + validity_offset);
- DP(NETIF_MSG_HW, "shmem 0x%x validity map(0x%x)=0x%x\n", shmem,
- shmem + validity_offset, val);
+ } while (cnt++ < (MCP_TIMEOUT / MCP_ONE_TIMEOUT));
- /* check that shared memory is valid. */
- if ((val & (SHR_MEM_VALIDITY_DEV_INFO | SHR_MEM_VALIDITY_MB))
- == (SHR_MEM_VALIDITY_DEV_INFO | SHR_MEM_VALIDITY_MB))
- break;
+ BNX2X_ERR("BAD MCP validity signature\n");
- bnx2x_mcp_wait_one(bp);
- }
-
- DP(NETIF_MSG_HW, "Cnt=%d Shmem validity map 0x%x\n", cnt, val);
+ return -ENODEV;
+}
- /* Check that shared memory is valid. This indicates that MCP is up. */
- if ((val & (SHR_MEM_VALIDITY_DEV_INFO | SHR_MEM_VALIDITY_MB)) !=
- (SHR_MEM_VALIDITY_DEV_INFO | SHR_MEM_VALIDITY_MB)) {
- BNX2X_ERR("Shmem signature not present. MCP is not up !!\n");
- rc = -ENOTTY;
- goto exit_lbl;
- }
+static int bnx2x_reset_mcp_comp(struct bnx2x *bp, u32 magic_val)
+{
+ int rc = bnx2x_init_shmem(bp);
-exit_lbl:
/* Restore the `magic' bit value */
if (!CHIP_IS_E1(bp))
bnx2x_clp_reset_done(bp, magic_val);
@@ -8007,10 +7991,12 @@ static void __devinit bnx2x_get_common_hwinfo(struct bnx2x *bp)
BNX2X_DEV_INFO("flash_size 0x%x (%d)\n",
bp->common.flash_size, bp->common.flash_size);
- bp->common.shmem_base = REG_RD(bp, MISC_REG_SHARED_MEM_ADDR);
+ bnx2x_init_shmem(bp);
+
bp->common.shmem2_base = REG_RD(bp, (BP_PATH(bp) ?
MISC_REG_GENERIC_CR_1 :
MISC_REG_GENERIC_CR_0));
+
bp->link_params.shmem_base = bp->common.shmem_base;
bp->link_params.shmem2_base = bp->common.shmem2_base;
BNX2X_DEV_INFO("shmem offset 0x%x shmem2 offset 0x%x\n",
@@ -8022,11 +8008,6 @@ static void __devinit bnx2x_get_common_hwinfo(struct bnx2x *bp)
return;
}
- val = SHMEM_RD(bp, validity_map[BP_PORT(bp)]);
- if ((val & (SHR_MEM_VALIDITY_DEV_INFO | SHR_MEM_VALIDITY_MB))
- != (SHR_MEM_VALIDITY_DEV_INFO | SHR_MEM_VALIDITY_MB))
- BNX2X_ERR("BAD MCP validity signature\n");
-
bp->common.hw_config = SHMEM_RD(bp, dev_info.shared_hw_config.config);
BNX2X_DEV_INFO("hw_config 0x%08x\n", bp->common.hw_config);
--
1.7.2.2
--
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