[dpdk-dev] [PATCH v2 3/9] net/virtio: add PCI ops for queue/irq binding

Jianfeng Tan jianfeng.tan at intel.com
Thu Dec 29 08:30:37 CET 2016


Add handler in virtio_pci_ops to set queue/irq bind.

Signed-off-by: Jianfeng Tan <jianfeng.tan at intel.com>
---
 drivers/net/virtio/virtio_pci.c | 29 +++++++++++++++++++++++++++++
 drivers/net/virtio/virtio_pci.h |  5 +++++
 2 files changed, 34 insertions(+)

diff --git a/drivers/net/virtio/virtio_pci.c b/drivers/net/virtio/virtio_pci.c
index 9b47165..4e706cf 100644
--- a/drivers/net/virtio/virtio_pci.c
+++ b/drivers/net/virtio/virtio_pci.c
@@ -217,6 +217,18 @@ legacy_set_config_irq(struct virtio_hw *hw, uint16_t vec)
 }
 
 static uint16_t
+legacy_set_queue_irq(struct virtio_hw *hw, struct virtqueue *vq, uint16_t vec)
+{
+	uint16_t dst;
+
+	rte_eal_pci_ioport_write(&hw->io, &vq->vq_queue_index, 2,
+			 VIRTIO_PCI_QUEUE_SEL);
+	rte_eal_pci_ioport_write(&hw->io, &vec, 2, VIRTIO_MSI_QUEUE_VECTOR);
+	rte_eal_pci_ioport_read(&hw->io, &dst, 2, VIRTIO_MSI_QUEUE_VECTOR);
+	return dst;
+}
+
+static uint16_t
 legacy_get_queue_num(struct virtio_hw *hw, uint16_t queue_id)
 {
 	uint16_t dst;
@@ -310,6 +322,7 @@ static const struct virtio_pci_ops legacy_ops = {
 	.set_features	= legacy_set_features,
 	.get_isr	= legacy_get_isr,
 	.set_config_irq	= legacy_set_config_irq,
+	.set_queue_irq = legacy_set_queue_irq,
 	.get_queue_num	= legacy_get_queue_num,
 	.setup_queue	= legacy_setup_queue,
 	.del_queue	= legacy_del_queue,
@@ -449,6 +462,15 @@ modern_set_config_irq(struct virtio_hw *hw, uint16_t vec)
 }
 
 static uint16_t
+modern_set_queue_irq(struct virtio_hw *hw, struct virtqueue *vq, uint16_t vec)
+{
+	PMD_INIT_LOG(INFO, "vq: %u, vec: %u", vq->vq_queue_index, vec);
+	io_write16(vq->vq_queue_index, &hw->common_cfg->queue_select);
+	io_write16(vec, &hw->common_cfg->queue_msix_vector);
+	return io_read16(&hw->common_cfg->queue_msix_vector);
+}
+
+static uint16_t
 modern_get_queue_num(struct virtio_hw *hw, uint16_t queue_id)
 {
 	io_write16(queue_id, &hw->common_cfg->queue_select);
@@ -526,6 +548,7 @@ static const struct virtio_pci_ops modern_ops = {
 	.set_features	= modern_set_features,
 	.get_isr	= modern_get_isr,
 	.set_config_irq	= modern_set_config_irq,
+	.set_queue_irq = modern_set_queue_irq,
 	.get_queue_num	= modern_get_queue_num,
 	.setup_queue	= modern_setup_queue,
 	.del_queue	= modern_del_queue,
@@ -605,6 +628,12 @@ vtpci_irq_config(struct virtio_hw *hw, uint16_t vec)
 	return hw->vtpci_ops->set_config_irq(hw, vec);
 }
 
+uint16_t
+vtpci_irq_queue(struct virtqueue *vq, uint16_t vec)
+{
+	return vq->hw->vtpci_ops->set_queue_irq(vq->hw, vq, vec);
+}
+
 static void *
 get_cfg_addr(struct rte_pci_device *dev, struct virtio_pci_cap *cap)
 {
diff --git a/drivers/net/virtio/virtio_pci.h b/drivers/net/virtio/virtio_pci.h
index de271bf..d12d40f 100644
--- a/drivers/net/virtio/virtio_pci.h
+++ b/drivers/net/virtio/virtio_pci.h
@@ -235,6 +235,9 @@ struct virtio_pci_ops {
 
 	uint16_t (*set_config_irq)(struct virtio_hw *hw, uint16_t vec);
 
+	uint16_t (*set_queue_irq)(struct virtio_hw *hw, struct virtqueue *vq,
+			uint16_t vec);
+
 	uint16_t (*get_queue_num)(struct virtio_hw *hw, uint16_t queue_id);
 	int (*setup_queue)(struct virtio_hw *hw, struct virtqueue *vq);
 	void (*del_queue)(struct virtio_hw *hw, struct virtqueue *vq);
@@ -317,4 +320,6 @@ uint8_t vtpci_isr(struct virtio_hw *);
 
 uint16_t vtpci_irq_config(struct virtio_hw *, uint16_t);
 
+uint16_t vtpci_irq_queue(struct virtqueue *vq, uint16_t vec);
+
 #endif /* _VIRTIO_PCI_H_ */
-- 
2.7.4



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