| Message ID | 20220110051947.84901-5-lingshan.zhu@intel.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | Supoort shared irq for virtqueues | expand |
| Context | Check | Description |
|---|---|---|
| netdev/tree_selection | success | Not a local patch |
diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c index 64fc78eaa1a9..19e1d1cd71a3 100644 --- a/drivers/vdpa/ifcvf/ifcvf_main.c +++ b/drivers/vdpa/ifcvf/ifcvf_main.c @@ -37,6 +37,21 @@ static irqreturn_t ifcvf_intr_handler(int irq, void *arg) return IRQ_HANDLED; } +static irqreturn_t ifcvf_shared_intr_handler(int irq, void *arg) +{ + struct ifcvf_hw *vf = arg; + struct vring_info *vring; + int i; + + for (i = 0; i < vf->nr_vring; i++) { + vring = &vf->vring[i]; + if (vring->cb.callback) + vf->vring->cb.callback(vring->cb.private); + } + + return IRQ_HANDLED; +} + static void ifcvf_free_irq_vectors(void *data) { pci_free_irq_vectors(data);
It has observed that a device may fail to alloc enough vectors on some platforms, e.g., requires 16 vectors, but only 2 or 4 vector slots allocated. The virt queues have to share a vector/irq under such circumstances. This irq handlers has to kick every queue because it is not possible to tell which queue triggers the interrupt. Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com> --- drivers/vdpa/ifcvf/ifcvf_main.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+)