* [PATCH v2] net/virtio: remove address width limit for modern devices
[not found] <20230309143604.2354288-1-david.marchand@redhat.com>
@ 2023-03-14 8:53 ` David Marchand
2023-03-16 14:46 ` Maxime Coquelin
0 siblings, 1 reply; 2+ messages in thread
From: David Marchand @ 2023-03-14 8:53 UTC (permalink / raw)
To: dev
Cc: stable, Maxime Coquelin, Andy Pei, Chenbo Xia, Yuanhan Liu,
Huawei Xie, Tetsuya Mukawa
Modern devices don't have the same limitation as legacy devices, because
vring addresses are not configured using a 32-bit register.
Fixes: 6ba1f63b5ab0 ("virtio: support specification 1.0")
Cc: stable@dpdk.org
Signed-off-by: David Marchand <david.marchand@redhat.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Acked-by: Andy Pei <andy.pei@intel.com>
Reviewed-by: Chenbo Xia <chenbo.xia@intel.com>
---
drivers/net/virtio/virtio_pci.c | 28 ++++++++--------------------
1 file changed, 8 insertions(+), 20 deletions(-)
diff --git a/drivers/net/virtio/virtio_pci.c b/drivers/net/virtio/virtio_pci.c
index 9cf4d760b4..29eb739b04 100644
--- a/drivers/net/virtio/virtio_pci.c
+++ b/drivers/net/virtio/virtio_pci.c
@@ -33,22 +33,6 @@
struct virtio_pci_internal virtio_pci_internal[RTE_MAX_ETHPORTS];
-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;
-}
-
#define PCI_MSIX_ENABLE 0x8000
static enum virtio_msix_status
@@ -273,8 +257,15 @@ legacy_setup_queue(struct virtio_hw *hw, struct virtqueue *vq)
{
uint32_t src;
- if (!check_vq_phys_addr_ok(vq))
+ /* Virtio PCI device VIRTIO_PCI_QUEUE_PFN 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 -1;
+ }
rte_pci_ioport_write(VTPCI_IO(hw), &vq->vq_queue_index, 2,
VIRTIO_PCI_QUEUE_SEL);
@@ -476,9 +467,6 @@ 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,
--
2.39.2
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH v2] net/virtio: remove address width limit for modern devices
2023-03-14 8:53 ` [PATCH v2] net/virtio: remove address width limit for modern devices David Marchand
@ 2023-03-16 14:46 ` Maxime Coquelin
0 siblings, 0 replies; 2+ messages in thread
From: Maxime Coquelin @ 2023-03-16 14:46 UTC (permalink / raw)
To: David Marchand, dev
Cc: stable, Andy Pei, Chenbo Xia, Yuanhan Liu, Huawei Xie, Tetsuya Mukawa
On 3/14/23 09:53, David Marchand wrote:
> Modern devices don't have the same limitation as legacy devices, because
> vring addresses are not configured using a 32-bit register.
>
> Fixes: 6ba1f63b5ab0 ("virtio: support specification 1.0")
> Cc: stable@dpdk.org
>
> Signed-off-by: David Marchand <david.marchand@redhat.com>
> Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
> Acked-by: Andy Pei <andy.pei@intel.com>
> Reviewed-by: Chenbo Xia <chenbo.xia@intel.com>
> ---
> drivers/net/virtio/virtio_pci.c | 28 ++++++++--------------------
> 1 file changed, 8 insertions(+), 20 deletions(-)
>
Applied to dpdk-next-virtio/main.
Thanks,
Maxime
^ permalink raw reply [flat|nested] 2+ messages in thread
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2023-03-14 8:53 ` [PATCH v2] net/virtio: remove address width limit for modern devices David Marchand
2023-03-16 14:46 ` Maxime Coquelin
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