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From: Gaetan Rivet <gaetan.rivet@6wind.com>
To: dev@dpdk.org
Cc: Gaetan Rivet <gaetan.rivet@6wind.com>
Date: Thu, 8 Jun 2017 01:58:28 +0200
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Subject: [dpdk-dev] [PATCH v3 1/3] pci: implement hotplug bus operation
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Signed-off-by: Gaetan Rivet <gaetan.rivet@6wind.com>
---
lib/librte_eal/common/eal_common_pci.c | 67 ++++++++++++++++++++++++++++++++++
1 file changed, 67 insertions(+)
diff --git a/lib/librte_eal/common/eal_common_pci.c b/lib/librte_eal/common/eal_common_pci.c
index b4f8056..6049b49 100644
--- a/lib/librte_eal/common/eal_common_pci.c
+++ b/lib/librte_eal/common/eal_common_pci.c
@@ -47,6 +47,7 @@
#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>
@@ -517,12 +518,78 @@ pci_find_device(rte_dev_cmp_t cmp, const void *data)
return NULL;
}
+static struct rte_device *
+pci_plug(struct rte_devargs *da)
+{
+ struct rte_pci_device *pdev;
+ struct rte_pci_addr addr;
+
+ if (pci_parse(da->name, &addr)) {
+ rte_errno = EFAULT;
+ return NULL;
+ }
+ /*
+ * Update eventual pci device in global list.
+ * Insert it if none was found.
+ */
+ if (pci_update_device(&addr) < 0) {
+ rte_errno = EIO;
+ return NULL;
+ }
+ /* 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. */
+ pdev->device.devargs = rte_eal_devargs_clone(da);
+ if (pdev->device.devargs == NULL) {
+ rte_errno = ENOMEM;
+ return NULL;
+ }
+ break;
+ }
+ if (rte_pci_probe_one(&addr)) {
+ rte_errno = ENODEV;
+ return NULL;
+ }
+ /* Get back new device name. */
+ if (pdev->device.devargs &&
+ da != pdev->device.devargs)
+ snprintf(da->name, sizeof(da->name), "%s",
+ pdev->device.devargs->name);
+ return &pdev->device;
+}
+
+static int
+pci_unplug(struct rte_device *dev)
+{
+ struct rte_pci_addr addr;
+
+ if (dev == NULL) {
+ rte_errno = EINVAL;
+ return -1;
+ }
+ if (pci_parse(dev->name, &addr)) {
+ rte_errno = EFAULT;
+ return -1;
+ }
+ if (rte_pci_detach(&addr)) {
+ rte_errno = ENODEV;
+ return -1;
+ }
+ if (dev->devargs)
+ rte_eal_devargs_rmv(dev->devargs);
+ 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,
+ .plug = pci_plug,
+ .unplug = pci_unplug,
},
.device_list = TAILQ_HEAD_INITIALIZER(rte_pci_bus.device_list),
.driver_list = TAILQ_HEAD_INITIALIZER(rte_pci_bus.driver_list),
--
2.1.4