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net/virtio: do not store PCI device pointer at shared memory

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hw->dev, a pointer to pci_dev, was actually not used, until the
refactor of decouping from PCI device. This would somehow break
the multiple process again, since "hw" is stored at shared memory,
while "pci_dev" is not: the primary and secondary process could
have different address for it, while just one value is allowed.

Thus we should not store it to "hw", instead, we could retrieve
it from the "eth_dev->device" field.

Fixes: ae34410a8a ("ethdev: move info filling of PCI into drivers")
Fixes: eac901ce29 ("ethdev: decouple from PCI device")

Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
This commit is contained in:
Yuanhan Liu 2017-01-12 13:37:00 +08:00
parent 61e3ee1756
commit 9470427c88
3 changed files with 7 additions and 11 deletions
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15
drivers/net/virtio/virtio_ethdev.c
View File

@ -489,7 +489,7 @@ virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx)
* virtual address. And we need properly set _offset_, please see
* VIRTIO_MBUF_DATA_DMA_ADDR in virtqueue.h for more information.
*/
if (hw->dev)
if (!hw->virtio_user_dev)
vq->offset = offsetof(struct rte_mbuf, buf_physaddr);
else {
vq->vq_ring_mem = (uintptr_t)mz->addr;
@ -1194,7 +1194,7 @@ virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
struct virtio_hw *hw = eth_dev->data->dev_private;
struct virtio_net_config *config;
struct virtio_net_config local_config;
struct rte_pci_device *pci_dev = hw->dev;
struct rte_pci_device *pci_dev = NULL;
int ret;
/* Reset the device although not necessary at startup */
@ -1214,7 +1214,8 @@ virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
else
eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
if (pci_dev) {
if (eth_dev->device) {
pci_dev = RTE_DEV_TO_PCI(eth_dev->device);
rte_eth_copy_pci_info(eth_dev, pci_dev);
eth_dev->data->dev_flags = RTE_ETH_DEV_DETACHABLE;
}
@ -1408,8 +1409,6 @@ eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
static int
eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
{
struct virtio_hw *hw = eth_dev->data->dev_private;
PMD_INIT_FUNC_TRACE();
if (rte_eal_process_type() == RTE_PROC_SECONDARY)
@ -1430,8 +1429,8 @@ eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
rte_intr_callback_unregister(eth_dev->intr_handle,
virtio_interrupt_handler,
eth_dev);
if (hw->dev)
rte_eal_pci_unmap_device(hw->dev);
if (eth_dev->device)
rte_eal_pci_unmap_device(RTE_DEV_TO_PCI(eth_dev->device));
PMD_INIT_LOG(DEBUG, "dev_uninit completed");
@ -1689,7 +1688,7 @@ virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
uint64_t tso_mask;
struct virtio_hw *hw = dev->data->dev_private;
dev_info->pci_dev = hw->dev;
dev_info->pci_dev = dev->device ? RTE_DEV_TO_PCI(dev->device) : NULL;
dev_info->max_rx_queues =
RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
dev_info->max_tx_queues =

2
drivers/net/virtio/virtio_pci.c
View File

@ -731,8 +731,6 @@ int
vtpci_init(struct rte_pci_device *dev, struct virtio_hw *hw,
uint32_t *dev_flags)
{
hw->dev = dev;
/*
* Try if we can succeed reading virtio pci caps, which exists
* only on modern pci device. If failed, we fallback to legacy

1
drivers/net/virtio/virtio_pci.h
View File

@ -258,7 +258,6 @@ struct virtio_hw {
uint32_t notify_off_multiplier;
uint8_t *isr;
uint16_t *notify_base;
struct rte_pci_device *dev;
struct virtio_pci_common_cfg *common_cfg;
struct virtio_net_config *dev_cfg;
void *virtio_user_dev;