[dpdk-dev] [PATCH 1/3] pci: implement attach/detach bus operation

[Gaetan Rivet]

Signed-off-by: Gaetan Rivet <gaetan.ri...@6wind.com>
---
 lib/librte_eal/common/eal_common_pci.c | 50 ++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)

diff --git a/lib/librte_eal/common/eal_common_pci.c 
b/lib/librte_eal/common/eal_common_pci.c
index 6d9fdda..269abb8 100644
--- a/lib/librte_eal/common/eal_common_pci.c
+++ b/lib/librte_eal/common/eal_common_pci.c
@@ -76,6 +76,7 @@
 #include <rte_pci.h>
 #include <rte_per_lcore.h>
 #include <rte_memory.h>
+#include <rte_memcpy.h>
 #include <rte_memzone.h>
 #include <rte_eal.h>
 #include <rte_string_fns.h>
@@ -546,12 +547,61 @@ pci_find_device(int (*match)(const struct rte_device 
*dev, const void *data),
        return NULL;
 }
 
+static int
+pci_attach(struct rte_device *dev)
+{
+       struct rte_pci_device *pdev;
+       struct rte_pci_addr addr;
+
+       if (dev == NULL)
+               return -EINVAL;
+       if (pci_parse(dev->name, &addr))
+               return -EFAULT;
+       /*
+        * Update eventual pci device in global list.
+        * Insert it if none was found.
+        */
+       if (pci_update_device(&addr) < 0)
+               return -EIO;
+       /* Find the current device holding this address in the bus. */
+       FOREACH_DEVICE_ON_PCIBUS(pdev) {
+               if (rte_eal_compare_pci_addr(&pdev->addr, &addr))
+                       continue;
+               /* Update eventual devargs, others device infos. */
+               if (dev != &pdev->device)
+                       rte_memcpy(&pdev->device, dev, sizeof(*dev));
+               break;
+       }
+       if (rte_pci_probe_one(&addr))
+               return -ENODEV;
+       /* Get back new device info. */
+       if (dev != &pdev->device)
+               rte_memcpy(dev, &pdev->device, sizeof(*dev));
+       return 0;
+}
+
+static int
+pci_detach(struct rte_device *dev)
+{
+       struct rte_pci_addr addr;
+
+       if (dev == NULL)
+               return -EINVAL;
+       if (pci_parse(dev->name, &addr))
+               return -EFAULT;
+       if (rte_pci_detach(&addr))
+               return -ENODEV;
+       return 0;
+}
+
 struct rte_pci_bus rte_pci_bus = {
        .bus = {
                .scan = rte_pci_scan,
                .probe = rte_pci_probe,
                .find_device = pci_find_device,
                .parse = pci_parse,
+               .attach = pci_attach,
+               .detach = pci_detach,
        },
        .device_list = TAILQ_HEAD_INITIALIZER(rte_pci_bus.device_list),
        .driver_list = TAILQ_HEAD_INITIALIZER(rte_pci_bus.driver_list),
-- 
2.1.4