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vxge: Check if FCS stripping is disabled by the firmware.

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- Added a function to check if FCS stripping is disabled by the firmware, if
  it is not disabled fail driver load.

- By default FCS stripping is disabled by the firmware. With this assumption
  driver decrements the indicated packet length by 4 bytes(FCS length).

- This patch ensures that FCS stripping is disabled during driver load time.

Signed-off-by: Sreenivasa Honnur <sreenivasa.honnur@neterion.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sreenivasa Honnur 2009-10-05 01:56:35 +00:00 committed by David S. Miller
parent f0dfebafcc
commit fa41fd1003
3 changed files with 33 additions and 0 deletions
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22
drivers/net/vxge/vxge-config.c
View file

@ -2156,6 +2156,28 @@ exit:
return status;
}
/*
* vxge_hw_vpath_strip_fcs_check - Check for FCS strip.
*/
enum vxge_hw_status
vxge_hw_vpath_strip_fcs_check(struct __vxge_hw_device *hldev, u64 vpath_mask)
{
struct vxge_hw_vpmgmt_reg __iomem *vpmgmt_reg;
enum vxge_hw_status status = VXGE_HW_OK;
int i = 0, j = 0;
for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) {
if (!((vpath_mask) & vxge_mBIT(i)))
continue;
vpmgmt_reg = hldev->vpmgmt_reg[i];
for (j = 0; j < VXGE_HW_MAC_MAX_MAC_PORT_ID; j++) {
if (readq(&vpmgmt_reg->rxmac_cfg0_port_vpmgmt_clone[j])
& VXGE_HW_RXMAC_CFG0_PORT_VPMGMT_CLONE_STRIP_FCS)
return VXGE_HW_FAIL;
}
}
return status;
}
/*
* vxge_hw_mgmt_reg_Write - Write Titan register.
*/

2
drivers/net/vxge/vxge-config.h
View file

@ -2201,6 +2201,8 @@ __vxge_hw_vpath_func_id_get(
enum vxge_hw_status
__vxge_hw_vpath_reset_check(struct __vxge_hw_virtualpath *vpath);
enum vxge_hw_status
vxge_hw_vpath_strip_fcs_check(struct __vxge_hw_device *hldev, u64 vpath_mask);
/**
* vxge_debug
* @level: level of debug verbosity.

9
drivers/net/vxge/vxge-main.c
View file

@ -4244,6 +4244,15 @@ vxge_probe(struct pci_dev *pdev, const struct pci_device_id *pre)
goto _exit3;
}
/* if FCS stripping is not disabled in MAC fail driver load */
if (vxge_hw_vpath_strip_fcs_check(hldev, vpath_mask) != VXGE_HW_OK) {
vxge_debug_init(VXGE_ERR,
"%s: FCS stripping is not disabled in MAC"
" failing driver load", VXGE_DRIVER_NAME);
ret = -EINVAL;
goto _exit4;
}
vxge_hw_device_debug_set(hldev, VXGE_ERR, VXGE_COMPONENT_LL);
/* set private device info */