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i40e: enable extant VFs 

If VFs are present when the driver loads, then set up some resources
so they can function.

Change-ID: I485916a811609a9990ce663d06dc645f625b07ff
Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Sibai Li <sibai.li@intel.com>
Signed-off-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Mitch Williams 2014-02-13 03:48:47 -08:00 committed by David S. Miller
parent 69f64b2b77
commit 4aeec0106d
3 changed files with 21 additions and 8 deletions
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10
drivers/net/ethernet/intel/i40e/i40e_main.c
View File

@ -8076,6 +8076,16 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
val &= ~I40E_PFGEN_PORTMDIO_NUM_VFLINK_STAT_ENA_MASK;
wr32(hw, I40E_PFGEN_PORTMDIO_NUM, val);
i40e_flush(hw);
if (pci_num_vf(pdev)) {
dev_info(&pdev->dev,
"Active VFs found, allocating resources.\n");
err = i40e_alloc_vfs(pf, pci_num_vf(pdev));
if (err)
dev_info(&pdev->dev,
"Error %d allocating resources for existing VFs\n",
err);
}
}
pfs_found++;

18
drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
View File

@ -840,7 +840,7 @@ void i40e_free_vfs(struct i40e_pf *pf)
*
* allocate vf resources
**/
static int i40e_alloc_vfs(struct i40e_pf *pf, u16 num_alloc_vfs)
int i40e_alloc_vfs(struct i40e_pf *pf, u16 num_alloc_vfs)
{
struct i40e_vf *vfs;
int i, ret = 0;
@ -848,14 +848,16 @@ static int i40e_alloc_vfs(struct i40e_pf *pf, u16 num_alloc_vfs)
/* Disable interrupt 0 so we don't try to handle the VFLR. */
i40e_irq_dynamic_disable_icr0(pf);
ret = pci_enable_sriov(pf->pdev, num_alloc_vfs);
if (ret) {
dev_err(&pf->pdev->dev,
"pci_enable_sriov failed with error %d!\n", ret);
pf->num_alloc_vfs = 0;
goto err_iov;
/* Check to see if we're just allocating resources for extant VFs */
if (pci_num_vf(pf->pdev) != num_alloc_vfs) {
ret = pci_enable_sriov(pf->pdev, num_alloc_vfs);
if (ret) {
dev_err(&pf->pdev->dev,
"Failed to enable SR-IOV, error %d.\n", ret);
pf->num_alloc_vfs = 0;
goto err_iov;
}
}
/* allocate memory */
vfs = kzalloc(num_alloc_vfs * sizeof(struct i40e_vf), GFP_KERNEL);
if (!vfs) {

1
drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
View File

@ -102,6 +102,7 @@ struct i40e_vf {
void i40e_free_vfs(struct i40e_pf *pf);
int i40e_pci_sriov_configure(struct pci_dev *dev, int num_vfs);
int i40e_alloc_vfs(struct i40e_pf *pf, u16 num_alloc_vfs);
int i40e_vc_process_vf_msg(struct i40e_pf *pf, u16 vf_id, u32 v_opcode,
u32 v_retval, u8 *msg, u16 msglen);
int i40e_vc_process_vflr_event(struct i40e_pf *pf);