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[SCSI] lpfc 8.3.25: PCI and SR-IOV Fixes

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PCI and SR-IOV Fixes

- Call pci_save_state after the pci_restore_state completes.
- After calling pci_enable_pcie_error_reporting() and checking the return
  value for logging messages from rc, reset rc to 0 to it will not later be
  interpreted for error.
- Read PCI config space SR-IOV capability to get the number of VFs supported.
- Check for the PF's supported number of VFs before invoking PCI enable sriov
  API call and log error message that user requested number of VFs is beyond
  the PF capability if such request is passed in.
- Added check for Physical function with Virtual Functions attached. If so,
  first disable all the VFs before proceeding to device reset.

Signed-off-by: Alex Iannicelli <alex.iannicelli@emulex.com>
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
James Smart
2011-07-22 18:37:28 -04:00
committed by James Bottomley
parent 5248a7498e
commit 0a96e9754d
4 changed files with 49 additions and 73 deletions
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76
drivers/scsi/lpfc/lpfc_attr.c
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@@ -1466,80 +1466,10 @@ lpfc_sriov_hw_max_virtfn_show(struct device *dev,
struct Scsi_Host *shost = class_to_shost(dev);
struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
struct lpfc_hba *phba = vport->phba;
struct pci_dev *pdev = phba->pcidev;
union lpfc_sli4_cfg_shdr *shdr;
uint32_t shdr_status, shdr_add_status;
LPFC_MBOXQ_t *mboxq;
struct lpfc_mbx_get_prof_cfg *get_prof_cfg;
struct lpfc_rsrc_desc_pcie *desc;
uint32_t max_nr_virtfn;
uint32_t desc_count;
int length, rc, i;
uint16_t max_nr_virtfn;
if ((phba->sli_rev < LPFC_SLI_REV4) ||
(bf_get(lpfc_sli_intf_if_type, &phba->sli4_hba.sli_intf) !=
LPFC_SLI_INTF_IF_TYPE_2))
return -EPERM;
if (!pdev->is_physfn)
return snprintf(buf, PAGE_SIZE, "%d\n", 0);
mboxq = (LPFC_MBOXQ_t *)mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
if (!mboxq)
return -ENOMEM;
/* get the maximum number of virtfn support by physfn */
length = (sizeof(struct lpfc_mbx_get_prof_cfg) -
sizeof(struct lpfc_sli4_cfg_mhdr));
lpfc_sli4_config(phba, mboxq, LPFC_MBOX_SUBSYSTEM_COMMON,
LPFC_MBOX_OPCODE_GET_PROFILE_CONFIG,
length, LPFC_SLI4_MBX_EMBED);
shdr = (union lpfc_sli4_cfg_shdr *)
&mboxq->u.mqe.un.sli4_config.header.cfg_shdr;
bf_set(lpfc_mbox_hdr_pf_num, &shdr->request,
phba->sli4_hba.iov.pf_number + 1);
get_prof_cfg = &mboxq->u.mqe.un.get_prof_cfg;
bf_set(lpfc_mbx_get_prof_cfg_prof_tp, &get_prof_cfg->u.request,
LPFC_CFG_TYPE_CURRENT_ACTIVE);
rc = lpfc_sli_issue_mbox_wait(phba, mboxq,
lpfc_mbox_tmo_val(phba, MBX_SLI4_CONFIG));
if (rc != MBX_TIMEOUT) {
/* check return status */
shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
shdr_add_status = bf_get(lpfc_mbox_hdr_add_status,
&shdr->response);
if (shdr_status || shdr_add_status || rc)
goto error_out;
} else
goto error_out;
desc_count = get_prof_cfg->u.response.prof_cfg.rsrc_desc_count;
for (i = 0; i < LPFC_RSRC_DESC_MAX_NUM; i++) {
desc = (struct lpfc_rsrc_desc_pcie *)
&get_prof_cfg->u.response.prof_cfg.desc[i];
if (LPFC_RSRC_DESC_TYPE_PCIE ==
bf_get(lpfc_rsrc_desc_pcie_type, desc)) {
max_nr_virtfn = bf_get(lpfc_rsrc_desc_pcie_nr_virtfn,
desc);
break;
}
}
if (i < LPFC_RSRC_DESC_MAX_NUM) {
if (rc != MBX_TIMEOUT)
mempool_free(mboxq, phba->mbox_mem_pool);
return snprintf(buf, PAGE_SIZE, "%d\n", max_nr_virtfn);
}
error_out:
if (rc != MBX_TIMEOUT)
mempool_free(mboxq, phba->mbox_mem_pool);
return -EIO;
max_nr_virtfn = lpfc_sli_sriov_nr_virtfn_get(phba);
return snprintf(buf, PAGE_SIZE, "%d\n", max_nr_virtfn);
}
/**