@@ -349,15 +349,6 @@ static int ifcvf_hw_enable(struct ifcvf_hw *hw)
ifc_iowrite64_twopart(hw->vring[i].used, &cfg->queue_used_lo,
&cfg->queue_used_hi);
ifc_iowrite16(hw->vring[i].size, &cfg->queue_size);
- ifc_iowrite16(i + IFCVF_MSI_QUEUE_OFF, &cfg->queue_msix_vector);
-
- if (ifc_ioread16(&cfg->queue_msix_vector) ==
- VIRTIO_MSI_NO_VECTOR) {
- IFCVF_ERR(ifcvf->pdev,
- "No msix vector for queue %u\n", i);
- return -EINVAL;
- }
-
ifcvf_set_vq_state(hw, i, hw->vring[i].last_avail_idx);
ifc_iowrite16(1, &cfg->queue_enable);
}
@@ -97,6 +97,72 @@ static int ifcvf_alloc_vectors(struct ifcvf_adapter *adapter)
return ret;
}
+static int ifcvf_request_per_vq_irq(struct ifcvf_adapter *adapter)
+{
+ struct pci_dev *pdev = adapter->pdev;
+ struct ifcvf_hw *vf = &adapter->vf;
+ int i, vector, ret, irq;
+
+ for (i = 0; i < vf->nr_vring; i++) {
+ snprintf(vf->vring[i].msix_name, 256, "ifcvf[%s]-%d\n", pci_name(pdev), i);
+ vector = i;
+ irq = pci_irq_vector(pdev, vector);
+ ret = devm_request_irq(&pdev->dev, irq,
+ ifcvf_intr_handler, 0,
+ vf->vring[i].msix_name,
+ &vf->vring[i]);
+ if (ret) {
+ IFCVF_ERR(pdev, "Failed to request irq for vq %d\n", i);
+ ifcvf_free_irq(adapter, i);
+ } else {
+ vf->vring[i].irq = irq;
+ ifcvf_set_vq_vector(vf, i, vector);
+ }
+ }
+
+ return 0;
+}
+
+static int ifcvf_request_shared_vq_irq(struct ifcvf_adapter *adapter)
+{
+ struct pci_dev *pdev = adapter->pdev;
+ struct ifcvf_hw *vf = &adapter->vf;
+ int i, vector, ret, irq;
+
+ vector = 0;
+ irq = pci_irq_vector(pdev, vector);
+ ret = devm_request_irq(&pdev->dev, irq,
+ ifcvf_shared_intr_handler, 0,
+ "ifcvf_shared_irq",
+ vf);
+ if (ret) {
+ IFCVF_ERR(pdev, "Failed to request shared irq for vf\n");
+
+ return ret;
+ }
+
+ for (i = 0; i < vf->nr_vring; i++) {
+ vf->vring[i].irq = irq;
+ ifcvf_set_vq_vector(vf, i, vector);
+ }
+
+ return 0;
+
+}
+
+static int ifcvf_request_vq_irq(struct ifcvf_adapter *adapter, u8 vector_per_vq)
+{
+ int ret;
+
+ if (vector_per_vq)
+ ret = ifcvf_request_per_vq_irq(adapter);
+ else
+ ret = ifcvf_request_shared_vq_irq(adapter);
+
+ return ret;
+}
+
+
static int ifcvf_request_irq(struct ifcvf_adapter *adapter)
{
struct pci_dev *pdev = adapter->pdev;
This commit implements new irq request helpers: ifcvf_request_shared_vq_irq() for a shared irq, in this case, all virtqueues would share one irq/vector. This can help the device work on some platforms that can not provide enough MSIX vectors ifcvf_request_per_vq_irq() for per vq irqs, in this case, every virtqueue has its own irq/vector ifcvf_request_vq_irq() calls either of the above two, depends on the number of allocated vectors. Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com> --- drivers/vdpa/ifcvf/ifcvf_base.c | 9 ----- drivers/vdpa/ifcvf/ifcvf_main.c | 66 +++++++++++++++++++++++++++++++++ 2 files changed, 66 insertions(+), 9 deletions(-)