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cxgb4vf: add call to Firmware to reset VF State. 

Add call to Firmware to reset its VF State when we first attach to the VF.

Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Casey Leedom 2010-11-11 09:06:53 +00:00 committed by David S. Miller
parent e7a3795f56
commit e68e6133e2
3 changed files with 36 additions and 0 deletions
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16
drivers/net/cxgb4vf/cxgb4vf_main.c
View File

@ -2064,6 +2064,22 @@ static int adap_init0(struct adapter *adapter)
return err;
}
/*
* Some environments do not properly handle PCIE FLRs -- e.g. in Linux
* 2.6.31 and later we can't call pci_reset_function() in order to
* issue an FLR because of a self- deadlock on the device semaphore.
* Meanwhile, the OS infrastructure doesn't issue FLRs in all the
* cases where they're needed -- for instance, some versions of KVM
* fail to reset "Assigned Devices" when the VM reboots. Therefore we
* use the firmware based reset in order to reset any per function
* state.
*/
err = t4vf_fw_reset(adapter);
if (err < 0) {
dev_err(adapter->pdev_dev, "FW reset failed: err=%d\n", err);
return err;
}
/*
* Grab basic operational parameters. These will predominantly have
* been set up by the Physical Function Driver or will be hard coded

1
drivers/net/cxgb4vf/t4vf_common.h
View File

@ -235,6 +235,7 @@ static inline int t4vf_wr_mbox_ns(struct adapter *adapter, const void *cmd,
int __devinit t4vf_wait_dev_ready(struct adapter *);
int __devinit t4vf_port_init(struct adapter *, int);
int t4vf_fw_reset(struct adapter *);
int t4vf_query_params(struct adapter *, unsigned int, const u32 *, u32 *);
int t4vf_set_params(struct adapter *, unsigned int, const u32 *, const u32 *);

19
drivers/net/cxgb4vf/t4vf_hw.c
View File

@ -325,6 +325,25 @@ int __devinit t4vf_port_init(struct adapter *adapter, int pidx)
return 0;
}
/**
* t4vf_fw_reset - issue a reset to FW
* @adapter: the adapter
*
* Issues a reset command to FW. For a Physical Function this would
* result in the Firmware reseting all of its state. For a Virtual
* Function this just resets the state associated with the VF.
*/
int t4vf_fw_reset(struct adapter *adapter)
{
struct fw_reset_cmd cmd;
memset(&cmd, 0, sizeof(cmd));
cmd.op_to_write = cpu_to_be32(FW_CMD_OP(FW_RESET_CMD) |
FW_CMD_WRITE);
cmd.retval_len16 = cpu_to_be32(FW_LEN16(cmd));
return t4vf_wr_mbox(adapter, &cmd, sizeof(cmd), NULL);
}
/**
* t4vf_query_params - query FW or device parameters
* @adapter: the adapter