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authorLuca Boccassi <luca.boccassi@gmail.com>2018-08-14 18:52:30 +0100
committerLuca Boccassi <luca.boccassi@gmail.com>2018-08-14 18:53:17 +0100
commitb63264c8342e6a1b6971c79550d2af2024b6a4de (patch)
tree83114aac64286fe616506c0b3dfaec2ab86ef835 /lib/librte_vhost/vdpa.c
parentca33590b6af032bff57d9cc70455660466a654b2 (diff)
New upstream version 18.08upstream/18.08
Change-Id: I32fdf5e5016556d9c0a6d88ddaf1fc468961790a Signed-off-by: Luca Boccassi <luca.boccassi@gmail.com>
Diffstat (limited to 'lib/librte_vhost/vdpa.c')
-rw-r--r--lib/librte_vhost/vdpa.c115
1 files changed, 115 insertions, 0 deletions
diff --git a/lib/librte_vhost/vdpa.c b/lib/librte_vhost/vdpa.c
new file mode 100644
index 00000000..c82fd437
--- /dev/null
+++ b/lib/librte_vhost/vdpa.c
@@ -0,0 +1,115 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2018 Intel Corporation
+ */
+
+/**
+ * @file
+ *
+ * Device specific vhost lib
+ */
+
+#include <stdbool.h>
+
+#include <rte_malloc.h>
+#include "rte_vdpa.h"
+#include "vhost.h"
+
+static struct rte_vdpa_device *vdpa_devices[MAX_VHOST_DEVICE];
+static uint32_t vdpa_device_num;
+
+static bool
+is_same_vdpa_device(struct rte_vdpa_dev_addr *a,
+ struct rte_vdpa_dev_addr *b)
+{
+ bool ret = true;
+
+ if (a->type != b->type)
+ return false;
+
+ switch (a->type) {
+ case PCI_ADDR:
+ if (a->pci_addr.domain != b->pci_addr.domain ||
+ a->pci_addr.bus != b->pci_addr.bus ||
+ a->pci_addr.devid != b->pci_addr.devid ||
+ a->pci_addr.function != b->pci_addr.function)
+ ret = false;
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+int
+rte_vdpa_register_device(struct rte_vdpa_dev_addr *addr,
+ struct rte_vdpa_dev_ops *ops)
+{
+ struct rte_vdpa_device *dev;
+ char device_name[MAX_VDPA_NAME_LEN];
+ int i;
+
+ if (vdpa_device_num >= MAX_VHOST_DEVICE)
+ return -1;
+
+ for (i = 0; i < MAX_VHOST_DEVICE; i++) {
+ dev = vdpa_devices[i];
+ if (dev && is_same_vdpa_device(&dev->addr, addr))
+ return -1;
+ }
+
+ for (i = 0; i < MAX_VHOST_DEVICE; i++) {
+ if (vdpa_devices[i] == NULL)
+ break;
+ }
+
+ sprintf(device_name, "vdpa-dev-%d", i);
+ dev = rte_zmalloc(device_name, sizeof(struct rte_vdpa_device),
+ RTE_CACHE_LINE_SIZE);
+ if (!dev)
+ return -1;
+
+ memcpy(&dev->addr, addr, sizeof(struct rte_vdpa_dev_addr));
+ dev->ops = ops;
+ vdpa_devices[i] = dev;
+ vdpa_device_num++;
+
+ return i;
+}
+
+int
+rte_vdpa_unregister_device(int did)
+{
+ if (did < 0 || did >= MAX_VHOST_DEVICE || vdpa_devices[did] == NULL)
+ return -1;
+
+ rte_free(vdpa_devices[did]);
+ vdpa_devices[did] = NULL;
+ vdpa_device_num--;
+
+ return did;
+}
+
+int
+rte_vdpa_find_device_id(struct rte_vdpa_dev_addr *addr)
+{
+ struct rte_vdpa_device *dev;
+ int i;
+
+ for (i = 0; i < MAX_VHOST_DEVICE; ++i) {
+ dev = vdpa_devices[i];
+ if (dev && is_same_vdpa_device(&dev->addr, addr))
+ return i;
+ }
+
+ return -1;
+}
+
+struct rte_vdpa_device *
+rte_vdpa_get_device(int did)
+{
+ if (did < 0 || did >= MAX_VHOST_DEVICE)
+ return NULL;
+
+ return vdpa_devices[did];
+}