diff options
| author |   Casey Leedom <leedom@chelsio.com> | 2010-11-11 09:06:53 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2010-11-12 12:31:01 -0800 |
| commit | e68e6133e2daef6fc40e91621a1e26938e428e9e (patch) | |
| tree | 21759991e47e782de8ebb4153396b651a0ef0095 | |
| parent | cxgb4vf: Fail open if link_start() fails. (diff) | |
| download | linux-dev-e68e6133e2daef6fc40e91621a1e26938e428e9e.tar.xz linux-dev-e68e6133e2daef6fc40e91621a1e26938e428e9e.zip | |
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>
| -rw-r--r-- | drivers/net/cxgb4vf/cxgb4vf_main.c | 16 | ||||
| -rw-r--r-- | drivers/net/cxgb4vf/t4vf_common.h | 1 | ||||
| -rw-r--r-- | drivers/net/cxgb4vf/t4vf_hw.c | 19 |
3 files changed, 36 insertions, 0 deletions
diff --git a/drivers/net/cxgb4vf/cxgb4vf_main.c b/drivers/net/cxgb4vf/cxgb4vf_main.c index 8da3bda13f33..c3449bbc585a 100644 --- a/drivers/net/cxgb4vf/cxgb4vf_main.c +++ b/drivers/net/cxgb4vf/cxgb4vf_main.c @@ -2065,6 +2065,22 @@ static int adap_init0(struct adapter *adapter) } /* + * 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 * into the adapter. We just have to live with them ... Note that diff --git a/drivers/net/cxgb4vf/t4vf_common.h b/drivers/net/cxgb4vf/t4vf_common.h index 873cb7d86c57..a65c80aed1f2 100644 --- a/drivers/net/cxgb4vf/t4vf_common.h +++ b/drivers/net/cxgb4vf/t4vf_common.h @@ -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 *); diff --git a/drivers/net/cxgb4vf/t4vf_hw.c b/drivers/net/cxgb4vf/t4vf_hw.c index ea1c123f0cb4..e306c20dfaee 100644 --- a/drivers/net/cxgb4vf/t4vf_hw.c +++ b/drivers/net/cxgb4vf/t4vf_hw.c @@ -326,6 +326,25 @@ int __devinit t4vf_port_init(struct adapter *adapter, int pidx) } /** + * 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 * @nparams: the number of parameters |