diff options
| author | Dmitry Kravkov <dmitry@broadcom.com> | 2010-10-19 05:13:05 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-10-19 08:37:37 -0700 |
| commit | a0fd065cd5d8f758b27c13cafabbbcf59d1eb8ec (patch) | |
| tree | 709021cdad6ca4438c86074ff658920bdb56bc9a /drivers/net/bnx2x | |
| parent | 8723e1b4ad9be4444423b4d41509ce859a629649 (diff) | |
| download | blackbird-op-linux-a0fd065cd5d8f758b27c13cafabbbcf59d1eb8ec.tar.gz blackbird-op-linux-a0fd065cd5d8f758b27c13cafabbbcf59d1eb8ec.zip | |
bnx2x: fix possible deadlock in HC hw block
The possible deadlock (on 57710 devices only) will prevent from the
device to generate interrupts.
Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/bnx2x')
| -rw-r--r-- | drivers/net/bnx2x/bnx2x_main.c | 37 |
1 files changed, 29 insertions, 8 deletions
diff --git a/drivers/net/bnx2x/bnx2x_main.c b/drivers/net/bnx2x/bnx2x_main.c index 012c093cb432..3f49b551ff05 100644 --- a/drivers/net/bnx2x/bnx2x_main.c +++ b/drivers/net/bnx2x/bnx2x_main.c @@ -1111,14 +1111,19 @@ static void bnx2x_hc_int_enable(struct bnx2x *bp) HC_CONFIG_0_REG_INT_LINE_EN_0 | HC_CONFIG_0_REG_ATTN_BIT_EN_0); - DP(NETIF_MSG_INTR, "write %x to HC %d (addr 0x%x)\n", - val, port, addr); + if (!CHIP_IS_E1(bp)) { + DP(NETIF_MSG_INTR, "write %x to HC %d (addr 0x%x)\n", + val, port, addr); - REG_WR(bp, addr, val); + REG_WR(bp, addr, val); - val &= ~HC_CONFIG_0_REG_MSI_MSIX_INT_EN_0; + val &= ~HC_CONFIG_0_REG_MSI_MSIX_INT_EN_0; + } } + if (CHIP_IS_E1(bp)) + REG_WR(bp, HC_REG_INT_MASK + port*4, 0x1FFFF); + DP(NETIF_MSG_INTR, "write %x to HC %d (addr 0x%x) mode %s\n", val, port, addr, (msix ? "MSI-X" : (msi ? "MSI" : "INTx"))); @@ -1212,10 +1217,26 @@ static void bnx2x_hc_int_disable(struct bnx2x *bp) u32 addr = port ? HC_REG_CONFIG_1 : HC_REG_CONFIG_0; u32 val = REG_RD(bp, addr); - val &= ~(HC_CONFIG_0_REG_SINGLE_ISR_EN_0 | - HC_CONFIG_0_REG_MSI_MSIX_INT_EN_0 | - HC_CONFIG_0_REG_INT_LINE_EN_0 | - HC_CONFIG_0_REG_ATTN_BIT_EN_0); + /* + * in E1 we must use only PCI configuration space to disable + * MSI/MSIX capablility + * It's forbitten to disable IGU_PF_CONF_MSI_MSIX_EN in HC block + */ + if (CHIP_IS_E1(bp)) { + /* Since IGU_PF_CONF_MSI_MSIX_EN still always on + * Use mask register to prevent from HC sending interrupts + * after we exit the function + */ + REG_WR(bp, HC_REG_INT_MASK + port*4, 0); + + val &= ~(HC_CONFIG_0_REG_SINGLE_ISR_EN_0 | + HC_CONFIG_0_REG_INT_LINE_EN_0 | + HC_CONFIG_0_REG_ATTN_BIT_EN_0); + } else + val &= ~(HC_CONFIG_0_REG_SINGLE_ISR_EN_0 | + HC_CONFIG_0_REG_MSI_MSIX_INT_EN_0 | + HC_CONFIG_0_REG_INT_LINE_EN_0 | + HC_CONFIG_0_REG_ATTN_BIT_EN_0); DP(NETIF_MSG_INTR, "write %x to HC %d (addr 0x%x)\n", val, port, addr); |
