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qlge: Fix chip reset process.

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Add wait for NIC fifo and MGMNT fifo to empty before applying reset.
Otherwise broken frames can be processed by management processor and
cause it to hang.

Signed-off-by: Ron Mercer <ron.mercer@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ron Mercer 2009-10-08 09:54:41 +00:00 committed by David S. Miller
parent 76b26694cc
commit 84087f4d48
3 changed files with 106 additions and 0 deletions
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8
drivers/net/qlge/qlge.h
View File

@ -803,6 +803,12 @@ enum {
MB_CMD_SET_PORT_CFG = 0x00000122,
MB_CMD_GET_PORT_CFG = 0x00000123,
MB_CMD_GET_LINK_STS = 0x00000124,
MB_CMD_SET_MGMNT_TFK_CTL = 0x00000160, /* Set Mgmnt Traffic Control */
MB_SET_MPI_TFK_STOP = (1 << 0),
MB_SET_MPI_TFK_RESUME = (1 << 1),
MB_CMD_GET_MGMNT_TFK_CTL = 0x00000161, /* Get Mgmnt Traffic Control */
MB_GET_MPI_TFK_STOPPED = (1 << 0),
MB_GET_MPI_TFK_FIFO_EMPTY = (1 << 1),
/* Mailbox Command Status. */
MB_CMD_STS_GOOD = 0x00004000, /* Success. */
@ -1606,6 +1612,8 @@ int ql_read_mpi_reg(struct ql_adapter *qdev, u32 reg, u32 *data);
int ql_mb_about_fw(struct ql_adapter *qdev);
void ql_link_on(struct ql_adapter *qdev);
void ql_link_off(struct ql_adapter *qdev);
int ql_mb_set_mgmnt_traffic_ctl(struct ql_adapter *qdev, u32 control);
int ql_wait_fifo_empty(struct ql_adapter *qdev);
#if 1
#define QL_ALL_DUMP

9
drivers/net/qlge/qlge_main.c
View File

@ -3349,6 +3349,13 @@ static int ql_adapter_reset(struct ql_adapter *qdev)
end_jiffies = jiffies +
max((unsigned long)1, usecs_to_jiffies(30));
/* Stop management traffic. */
ql_mb_set_mgmnt_traffic_ctl(qdev, MB_SET_MPI_TFK_STOP);
/* Wait for the NIC and MGMNT FIFOs to empty. */
ql_wait_fifo_empty(qdev);
ql_write32(qdev, RST_FO, (RST_FO_FR << 16) | RST_FO_FR);
do {
@ -3364,6 +3371,8 @@ static int ql_adapter_reset(struct ql_adapter *qdev)
status = -ETIMEDOUT;
}
/* Resume management traffic. */
ql_mb_set_mgmnt_traffic_ctl(qdev, MB_SET_MPI_TFK_RESUME);
return status;
}

89
drivers/net/qlge/qlge_mpi.c
View File

@ -768,6 +768,95 @@ static int ql_idc_wait(struct ql_adapter *qdev)
return status;
}
int ql_mb_set_mgmnt_traffic_ctl(struct ql_adapter *qdev, u32 control)
{
struct mbox_params mbc;
struct mbox_params *mbcp = &mbc;
int status;
memset(mbcp, 0, sizeof(struct mbox_params));
mbcp->in_count = 1;
mbcp->out_count = 2;
mbcp->mbox_in[0] = MB_CMD_SET_MGMNT_TFK_CTL;
mbcp->mbox_in[1] = control;
status = ql_mailbox_command(qdev, mbcp);
if (status)
return status;
if (mbcp->mbox_out[0] == MB_CMD_STS_GOOD)
return status;
if (mbcp->mbox_out[0] == MB_CMD_STS_INVLD_CMD) {
QPRINTK(qdev, DRV, ERR,
"Command not supported by firmware.\n");
status = -EINVAL;
} else if (mbcp->mbox_out[0] == MB_CMD_STS_ERR) {
/* This indicates that the firmware is
* already in the state we are trying to
* change it to.
*/
QPRINTK(qdev, DRV, ERR,
"Command parameters make no change.\n");
}
return status;
}
/* Returns a negative error code or the mailbox command status. */
static int ql_mb_get_mgmnt_traffic_ctl(struct ql_adapter *qdev, u32 *control)
{
struct mbox_params mbc;
struct mbox_params *mbcp = &mbc;
int status;
memset(mbcp, 0, sizeof(struct mbox_params));
*control = 0;
mbcp->in_count = 1;
mbcp->out_count = 1;
mbcp->mbox_in[0] = MB_CMD_GET_MGMNT_TFK_CTL;
status = ql_mailbox_command(qdev, mbcp);
if (status)
return status;
if (mbcp->mbox_out[0] == MB_CMD_STS_GOOD) {
*control = mbcp->mbox_in[1];
return status;
}
if (mbcp->mbox_out[0] == MB_CMD_STS_INVLD_CMD) {
QPRINTK(qdev, DRV, ERR,
"Command not supported by firmware.\n");
status = -EINVAL;
} else if (mbcp->mbox_out[0] == MB_CMD_STS_ERR) {
QPRINTK(qdev, DRV, ERR,
"Failed to get MPI traffic control.\n");
status = -EIO;
}
return status;
}
int ql_wait_fifo_empty(struct ql_adapter *qdev)
{
int count = 5;
u32 mgmnt_fifo_empty;
u32 nic_fifo_empty;
do {
nic_fifo_empty = ql_read32(qdev, STS) & STS_NFE;
ql_mb_get_mgmnt_traffic_ctl(qdev, &mgmnt_fifo_empty);
mgmnt_fifo_empty &= MB_GET_MPI_TFK_FIFO_EMPTY;
if (nic_fifo_empty && mgmnt_fifo_empty)
return 0;
msleep(100);
} while (count-- > 0);
return -ETIMEDOUT;
}
/* API called in work thread context to set new TX/RX
* maximum frame size values to match MTU.
*/