[PATCH] bus/pci: fix legacy device IO port map in secondary process
Wenwu Ma
wenwux.ma at intel.com
Mon Aug 7 03:58:20 CEST 2023
When doing IO port mapping for legacy device
in secondary process, the region information
is missing, so, we need to refill it.
Fixes: 4b741542ecde ("bus/pci: avoid depending on private kernel value")
Cc: stable at dpdk.org
Signed-off-by: Wenwu Ma <wenwux.ma at intel.com>
---
drivers/bus/pci/linux/pci_vfio.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/drivers/bus/pci/linux/pci_vfio.c b/drivers/bus/pci/linux/pci_vfio.c
index e634de8322..eea1c9851e 100644
--- a/drivers/bus/pci/linux/pci_vfio.c
+++ b/drivers/bus/pci/linux/pci_vfio.c
@@ -1306,6 +1306,11 @@ int
pci_vfio_ioport_map(struct rte_pci_device *dev, int bar,
struct rte_pci_ioport *p)
{
+ struct vfio_device_info device_info = { .argsz = sizeof(device_info) };
+ char pci_addr[PATH_MAX] = {0};
+ int vfio_dev_fd;
+ struct rte_pci_addr *loc = &dev->addr;
+ int ret;
uint64_t size, offset;
if (bar < VFIO_PCI_BAR0_REGION_INDEX ||
@@ -1314,6 +1319,22 @@ pci_vfio_ioport_map(struct rte_pci_device *dev, int bar,
return -1;
}
+ if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
+ /* store PCI address string */
+ snprintf(pci_addr, sizeof(pci_addr), PCI_PRI_FMT,
+ loc->domain, loc->bus, loc->devid, loc->function);
+
+ ret = rte_vfio_setup_device(rte_pci_get_sysfs_path(), pci_addr,
+ &vfio_dev_fd, &device_info);
+ if (ret)
+ return -1;
+
+ ret = pci_vfio_fill_regions(dev, vfio_dev_fd, &device_info);
+ if (ret)
+ return -1;
+
+ }
+
if (pci_vfio_get_region(dev, bar, &size, &offset) != 0) {
RTE_LOG(ERR, EAL, "Cannot get offset of region %d.\n", bar);
return -1;
--
2.25.1
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