[PATCH V2 2/2] vdpa: implement config interrupt in IFCVF

Zhu Lingshan
2020-04-26T06:13:20Z

This commit implements config interrupt support
in IFC VF

Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
---
drivers/vdpa/ifcvf/ifcvf_base.c | 3 +++
drivers/vdpa/ifcvf/ifcvf_base.h | 3 +++
drivers/vdpa/ifcvf/ifcvf_main.c | 22 +++++++++++++++++++++-
3 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/drivers/vdpa/ifcvf/ifcvf_base.c b/drivers/vdpa/ifcvf/ifcvf_base.c
index b61b06e..c825d99 100644
--- a/drivers/vdpa/ifcvf/ifcvf_base.c
+++ b/drivers/vdpa/ifcvf/ifcvf_base.c
@@ -185,6 +185,9 @@ void ifcvf_set_status(struct ifcvf_hw *hw, u8 status)

void ifcvf_reset(struct ifcvf_hw *hw)
{
+ hw->config_cb.callback = NULL;
+ hw->config_cb.private = NULL;
+
ifcvf_set_status(hw, 0);
/* flush set_status, make sure VF is stopped, reset */
ifcvf_get_status(hw);
diff --git a/drivers/vdpa/ifcvf/ifcvf_base.h b/drivers/vdpa/ifcvf/ifcvf_base.h
index e803070..23ac47d 100644
--- a/drivers/vdpa/ifcvf/ifcvf_base.h
+++ b/drivers/vdpa/ifcvf/ifcvf_base.h
@@ -27,6 +27,7 @@
((1ULL << VIRTIO_NET_F_MAC) | \
(1ULL << VIRTIO_F_ANY_LAYOUT) | \
(1ULL << VIRTIO_F_VERSION_1) | \
+ (1ULL << VIRTIO_NET_F_STATUS) | \
(1ULL << VIRTIO_F_ORDER_PLATFORM) | \
(1ULL << VIRTIO_F_IOMMU_PLATFORM) | \
(1ULL << VIRTIO_NET_F_MRG_RXBUF))
@@ -81,6 +82,8 @@ struct ifcvf_hw {
void __iomem *net_cfg;
struct vring_info vring[IFCVF_MAX_QUEUE_PAIRS * 2];
void __iomem * const *base;
+ char config_msix_name[256];
+ struct vdpa_callback config_cb;
};

struct ifcvf_adapter {
diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
index 8d54dc5..f7baeca 100644
--- a/drivers/vdpa/ifcvf/ifcvf_main.c
+++ b/drivers/vdpa/ifcvf/ifcvf_main.c
@@ -18,6 +18,16 @@
#define DRIVER_AUTHOR "Intel Corporation"
#define IFCVF_DRIVER_NAME "ifcvf"

+static irqreturn_t ifcvf_config_changed(int irq, void *arg)
+{
+ struct ifcvf_hw *vf = arg;
+
+ if (vf->config_cb.callback)
+ return vf->config_cb.callback(vf->config_cb.private);
+
+ return IRQ_HANDLED;
+}
+
static irqreturn_t ifcvf_intr_handler(int irq, void *arg)
{
struct vring_info *vring = arg;
@@ -256,7 +266,10 @@ static void ifcvf_vdpa_set_config(struct vdpa_device *vdpa_dev,
static void ifcvf_vdpa_set_config_cb(struct vdpa_device *vdpa_dev,
struct vdpa_callback *cb)
{
- /* We don't support config interrupt */
+ struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+ vf->config_cb.callback = cb->callback;
+ vf->config_cb.private = cb->private;
}

/*
@@ -292,6 +305,13 @@ static int ifcvf_request_irq(struct ifcvf_adapter *adapter)
struct ifcvf_hw *vf = &adapter->vf;
int vector, i, ret, irq;

+ snprintf(vf->config_msix_name, 256, "ifcvf[%s]-config\n",
+ pci_name(pdev));
+ vector = 0;
+ irq = pci_irq_vector(pdev, vector);
+ ret = devm_request_irq(&pdev->dev, irq,
+ ifcvf_config_changed, 0,
+ vf->config_msix_name, vf);

for (i = 0; i < IFCVF_MAX_QUEUE_PAIRS * 2; i++) {
snprintf(vf->vring[i].msix_name, 256, "ifcvf[%s]-%d\n",
--
1.8.3.1