From: Jianfeng Tan <jianfeng.tan@intel.com>
Date: Wed, 15 Jun 2016 09:03:20 +0000 (+0000)
Subject: net/virtio: hide vring address check inside PCI ops
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=595454c5ac6d5f6e7b1ad278061549663c01bf9a;p=dpdk.git

net/virtio: hide vring address check inside PCI ops

This patch moves phys addr check from virtio_dev_queue_setup
to pci ops. To make that happen, make sure virtio_ops.setup_queue
return the result if we pass through the check.

Signed-off-by: Jianfeng Tan <jianfeng.tan@intel.com>
Signed-off-by: Huawei Xie <huawei.xie@intel.com>
Acked-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
---

diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index 4cb27b6df8..48f5d9ee80 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -391,16 +391,6 @@ int virtio_dev_queue_setup(struct rte_eth_dev *dev,
 		}
 	}
 
-	/*
-	 * Virtio PCI device VIRTIO_PCI_QUEUE_PF register is 32bit,
-	 * and only accepts 32 bit page frame number.
-	 * Check if the allocated physical memory exceeds 16TB.
-	 */
-	if ((mz->phys_addr + vq->vq_ring_size - 1) >> (VIRTIO_PCI_QUEUE_ADDR_SHIFT + 32)) {
-		PMD_INIT_LOG(ERR, "vring address shouldn't be above 16TB!");
-		ret = -ENOMEM;
-		goto fail_q_alloc;
-	}
 	memset(mz->addr, 0, sizeof(mz->len));
 
 	vq->vq_ring_mem = mz->phys_addr;
@@ -485,7 +475,12 @@ int virtio_dev_queue_setup(struct rte_eth_dev *dev,
 		*pvq = cvq;
 	}
 
-	hw->vtpci_ops->setup_queue(hw, vq);
+	if (hw->vtpci_ops->setup_queue(hw, vq) < 0) {
+		PMD_INIT_LOG(ERR, "setup_queue failed");
+		virtio_dev_queue_release(vq);
+		return -EINVAL;
+	}
+
 	vq->configured = 1;
 	return 0;
 
diff --git a/drivers/net/virtio/virtio_pci.c b/drivers/net/virtio/virtio_pci.c
index 7790707922..f1a7ca7eb8 100644
--- a/drivers/net/virtio/virtio_pci.c
+++ b/drivers/net/virtio/virtio_pci.c
@@ -55,6 +55,22 @@
  */
 #define VIRTIO_PCI_CONFIG(hw) (((hw)->use_msix) ? 24 : 20)
 
+static inline int
+check_vq_phys_addr_ok(struct virtqueue *vq)
+{
+	/* Virtio PCI device VIRTIO_PCI_QUEUE_PF register is 32bit,
+	 * and only accepts 32 bit page frame number.
+	 * Check if the allocated physical memory exceeds 16TB.
+	 */
+	if ((vq->vq_ring_mem + vq->vq_ring_size - 1) >>
+			(VIRTIO_PCI_QUEUE_ADDR_SHIFT + 32)) {
+		PMD_INIT_LOG(ERR, "vring address shouldn't be above 16TB!");
+		return 0;
+	}
+
+	return 1;
+}
+
 /*
  * Since we are in legacy mode:
  * http://ozlabs.org/~rusty/virtio-spec/virtio-0.9.5.pdf
@@ -66,7 +82,6 @@
  * For powerpc which supports both, qemu supposes that cpu is big endian and
  * enforces this for the virtio-net stuff.
  */
-
 static void
 legacy_read_dev_config(struct virtio_hw *hw, size_t offset,
 		       void *dst, int length)
@@ -211,15 +226,20 @@ legacy_get_queue_num(struct virtio_hw *hw, uint16_t queue_id)
 	return dst;
 }
 
-static void
+static int
 legacy_setup_queue(struct virtio_hw *hw, struct virtqueue *vq)
 {
 	uint32_t src;
 
+	if (!check_vq_phys_addr_ok(vq))
+		return -1;
+
 	rte_eal_pci_ioport_write(&hw->io, &vq->vq_queue_index, 2,
 			 VIRTIO_PCI_QUEUE_SEL);
 	src = vq->vq_ring_mem >> VIRTIO_PCI_QUEUE_ADDR_SHIFT;
 	rte_eal_pci_ioport_write(&hw->io, &src, 4, VIRTIO_PCI_QUEUE_PFN);
+
+	return 0;
 }
 
 static void
@@ -435,12 +455,15 @@ modern_get_queue_num(struct virtio_hw *hw, uint16_t queue_id)
 	return io_read16(&hw->common_cfg->queue_size);
 }
 
-static void
+static int
 modern_setup_queue(struct virtio_hw *hw, struct virtqueue *vq)
 {
 	uint64_t desc_addr, avail_addr, used_addr;
 	uint16_t notify_off;
 
+	if (!check_vq_phys_addr_ok(vq))
+		return -1;
+
 	desc_addr = vq->vq_ring_mem;
 	avail_addr = desc_addr + vq->vq_nentries * sizeof(struct vring_desc);
 	used_addr = RTE_ALIGN_CEIL(avail_addr + offsetof(struct vring_avail,
@@ -468,6 +491,8 @@ modern_setup_queue(struct virtio_hw *hw, struct virtqueue *vq)
 	PMD_INIT_LOG(DEBUG, "\t used_addr: %" PRIx64, used_addr);
 	PMD_INIT_LOG(DEBUG, "\t notify addr: %p (notify offset: %u)",
 		vq->notify_addr, notify_off);
+
+	return 0;
 }
 
 static void
diff --git a/drivers/net/virtio/virtio_pci.h b/drivers/net/virtio/virtio_pci.h
index f20468ae4a..6c7f8d749b 100644
--- a/drivers/net/virtio/virtio_pci.h
+++ b/drivers/net/virtio/virtio_pci.h
@@ -235,7 +235,7 @@ struct virtio_pci_ops {
 	uint16_t (*set_config_irq)(struct virtio_hw *hw, uint16_t vec);
 
 	uint16_t (*get_queue_num)(struct virtio_hw *hw, uint16_t queue_id);
-	void (*setup_queue)(struct virtio_hw *hw, struct virtqueue *vq);
+	int (*setup_queue)(struct virtio_hw *hw, struct virtqueue *vq);
 	void (*del_queue)(struct virtio_hw *hw, struct virtqueue *vq);
 	void (*notify_queue)(struct virtio_hw *hw, struct virtqueue *vq);
 };