diff options
| author | Hariprasad Shenai <hariprasad@chelsio.com> | 2014-06-27 13:53:47 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-07-02 01:56:10 (GMT) |
| commit | 35b1de5579704be0e03454f713dddd6f86eccb7e (patch) | |
| tree | a103a63946eafd23e9bfd55c40b36739bc17db01 /drivers/net/ethernet/chelsio | |
| parent | 2eb27a16b58e07053e9bac2f050eb55b47bc9699 (diff) | |
| download | linux-35b1de5579704be0e03454f713dddd6f86eccb7e.tar.xz | |
rdma/cxgb4: Fixes cxgb4 probe failure in VM when PF is exposed through PCI Passthrough
Change logic which determines our Physical Function at PCI Probe time.
Now we read the PL_WHOAMI register and get the Physical Function.
Pass Physical Function to Upper Layer Drivers in lld_info structure in the
new field "pf" added to lld_info. This is useful for the cases where the
PF, say PF4, is attached to a Virtual Machine via some form of "PCI
Pass Through" technology and the PCI Function shows up as PF0 in the VM.
Based on original work by Casey Leedom <leedom@chelsio.com>
Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/chelsio')
| -rw-r--r-- | drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c | 18 | ||||
| -rw-r--r-- | drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.h | 1 |
2 files changed, 11 insertions, 8 deletions
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c index b7154dc..e8e77b8 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c @@ -4053,6 +4053,7 @@ static void uld_attach(struct adapter *adap, unsigned int uld) unsigned short i; lli.pdev = adap->pdev; + lli.pf = adap->fn; lli.l2t = adap->l2t; lli.tids = &adap->tids; lli.ports = adap->port; @@ -6294,13 +6295,6 @@ static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent) return err; } - /* We control everything through one PF */ - func = PCI_FUNC(pdev->devfn); - if (func != ent->driver_data) { - pci_save_state(pdev); /* to restore SR-IOV later */ - goto sriov; - } - err = pci_enable_device(pdev); if (err) { dev_err(&pdev->dev, "cannot enable PCI device\n"); @@ -6344,6 +6338,15 @@ static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent) goto out_free_adapter; } + /* We control everything through one PF */ + func = SOURCEPF_GET(readl(adapter->regs + PL_WHOAMI)); + if ((pdev->device == 0xa000 && func != 0) || + func != ent->driver_data) { + pci_save_state(pdev); /* to restore SR-IOV later */ + err = 0; + goto out_unmap_bar0; + } + adapter->pdev = pdev; adapter->pdev_dev = &pdev->dev; adapter->mbox = func; @@ -6507,7 +6510,6 @@ static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent) if (is_offload(adapter)) attach_ulds(adapter); -sriov: #ifdef CONFIG_PCI_IOV if (func < ARRAY_SIZE(num_vf) && num_vf[func] > 0) if (pci_enable_sriov(pdev, num_vf[func]) == 0) diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.h index d719dec..8f60851 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.h +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.h @@ -253,6 +253,7 @@ struct cxgb4_lld_info { int dbfifo_int_thresh; /* doorbell fifo int threshold */ unsigned int sge_pktshift; /* Padding between CPL and */ /* packet data */ + unsigned int pf; /* Physical Function we're using */ bool enable_fw_ofld_conn; /* Enable connection through fw */ /* WR */ bool ulptx_memwrite_dsgl; /* use of T5 DSGL allowed */ |