leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

NTB: Check the device ID to set errata flags

Browse Source 
Set errata flags for the specific device IDs to which they apply,
instead of the whole Xeon hardware class.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
This commit is contained in:
Dave Jiang 2015-05-08 12:24:40 -04:00 committed by Jon Mason
parent 5ae0beb6bc
commit dd5d4d8edb
1 changed files with 44 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
drivers/ntb/hw/intel/ntb_hw_intel.c
View File

@ -1718,29 +1718,68 @@ static int snb_init_dev(struct intel_ntb_dev *ndev)
u8 ppd;
int rc, mem;
pdev = ndev_pdev(ndev);
switch (pdev->device) {
/* There is a Xeon hardware errata related to writes to SDOORBELL or
* B2BDOORBELL in conjunction with inbound access to NTB MMIO Space,
* which may hang the system. To workaround this use the second memory
* window to access the interrupt and scratch pad registers on the
* remote system.
*/
ndev->hwerr_flags |= NTB_HWERR_SDOORBELL_LOCKUP;
case PCI_DEVICE_ID_INTEL_NTB_SS_JSF:
case PCI_DEVICE_ID_INTEL_NTB_PS_JSF:
case PCI_DEVICE_ID_INTEL_NTB_B2B_JSF:
case PCI_DEVICE_ID_INTEL_NTB_SS_SNB:
case PCI_DEVICE_ID_INTEL_NTB_PS_SNB:
case PCI_DEVICE_ID_INTEL_NTB_B2B_SNB:
case PCI_DEVICE_ID_INTEL_NTB_SS_IVT:
case PCI_DEVICE_ID_INTEL_NTB_PS_IVT:
case PCI_DEVICE_ID_INTEL_NTB_B2B_IVT:
case PCI_DEVICE_ID_INTEL_NTB_SS_HSX:
case PCI_DEVICE_ID_INTEL_NTB_PS_HSX:
case PCI_DEVICE_ID_INTEL_NTB_B2B_HSX:
ndev->hwerr_flags |= NTB_HWERR_SDOORBELL_LOCKUP;
break;
}
switch (pdev->device) {
/* There is a hardware errata related to accessing any register in
* SB01BASE in the presence of bidirectional traffic crossing the NTB.
*/
ndev->hwerr_flags |= NTB_HWERR_SB01BASE_LOCKUP;
case PCI_DEVICE_ID_INTEL_NTB_SS_IVT:
case PCI_DEVICE_ID_INTEL_NTB_PS_IVT:
case PCI_DEVICE_ID_INTEL_NTB_B2B_IVT:
case PCI_DEVICE_ID_INTEL_NTB_SS_HSX:
case PCI_DEVICE_ID_INTEL_NTB_PS_HSX:
case PCI_DEVICE_ID_INTEL_NTB_B2B_HSX:
ndev->hwerr_flags |= NTB_HWERR_SB01BASE_LOCKUP;
break;
}
switch (pdev->device) {
/* HW Errata on bit 14 of b2bdoorbell register. Writes will not be
* mirrored to the remote system. Shrink the number of bits by one,
* since bit 14 is the last bit.
*/
ndev->hwerr_flags |= NTB_HWERR_B2BDOORBELL_BIT14;
case PCI_DEVICE_ID_INTEL_NTB_SS_JSF:
case PCI_DEVICE_ID_INTEL_NTB_PS_JSF:
case PCI_DEVICE_ID_INTEL_NTB_B2B_JSF:
case PCI_DEVICE_ID_INTEL_NTB_SS_SNB:
case PCI_DEVICE_ID_INTEL_NTB_PS_SNB:
case PCI_DEVICE_ID_INTEL_NTB_B2B_SNB:
case PCI_DEVICE_ID_INTEL_NTB_SS_IVT:
case PCI_DEVICE_ID_INTEL_NTB_PS_IVT:
case PCI_DEVICE_ID_INTEL_NTB_B2B_IVT:
case PCI_DEVICE_ID_INTEL_NTB_SS_HSX:
case PCI_DEVICE_ID_INTEL_NTB_PS_HSX:
case PCI_DEVICE_ID_INTEL_NTB_B2B_HSX:
ndev->hwerr_flags |= NTB_HWERR_B2BDOORBELL_BIT14;
break;
}
ndev->reg = &snb_reg;
pdev = ndev_pdev(ndev);
rc = pci_read_config_byte(pdev, SNB_PPD_OFFSET, &ppd);
if (rc)
return -EIO;