-/*-
- * BSD LICENSE
- *
- * Copyright(c) 2016 Intel Corporation. All rights reserved.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2016 Intel Corporation
*/
#include <sys/types.h>
[VHOST_USER_SET_MEM_TABLE] = VHOST_SET_MEM_TABLE,
};
-/* By default, vhost kernel module allows 64 regions, but DPDK allows
- * 256 segments. As a relief, below function merges those virtually
- * adjacent memsegs into one region.
+static int
+add_memseg_list(const struct rte_memseg_list *msl, void *arg)
+{
+ struct vhost_memory_kernel *vm = arg;
+ struct vhost_memory_region *mr;
+ void *start_addr;
+ uint64_t len;
+
+ if (msl->external)
+ return 0;
+
+ if (vm->nregions >= max_regions)
+ return -1;
+
+ start_addr = msl->base_va;
+ len = msl->page_sz * msl->memseg_arr.len;
+
+ mr = &vm->regions[vm->nregions++];
+
+ mr->guest_phys_addr = (uint64_t)(uintptr_t)start_addr;
+ mr->userspace_addr = (uint64_t)(uintptr_t)start_addr;
+ mr->memory_size = len;
+ mr->mmap_offset = 0; /* flags_padding */
+
+ PMD_DRV_LOG(DEBUG, "index=%u addr=%p len=%" PRIu64,
+ vm->nregions - 1, start_addr, len);
+
+ return 0;
+}
+
+/* By default, vhost kernel module allows 64 regions, but DPDK may
+ * have much more memory regions. Below function will treat each
+ * contiguous memory space reserved by DPDK as one region.
*/
static struct vhost_memory_kernel *
prepare_vhost_memory_kernel(void)
{
- uint32_t i, j, k = 0;
- struct rte_memseg *seg;
- struct vhost_memory_region *mr;
struct vhost_memory_kernel *vm;
vm = malloc(sizeof(struct vhost_memory_kernel) +
- max_regions *
- sizeof(struct vhost_memory_region));
+ max_regions *
+ sizeof(struct vhost_memory_region));
if (!vm)
return NULL;
- for (i = 0; i < RTE_MAX_MEMSEG; ++i) {
- seg = &rte_eal_get_configuration()->mem_config->memseg[i];
- if (!seg->addr)
- break;
-
- int new_region = 1;
-
- for (j = 0; j < k; ++j) {
- mr = &vm->regions[j];
-
- if (mr->userspace_addr + mr->memory_size ==
- (uint64_t)(uintptr_t)seg->addr) {
- mr->memory_size += seg->len;
- new_region = 0;
- break;
- }
-
- if ((uint64_t)(uintptr_t)seg->addr + seg->len ==
- mr->userspace_addr) {
- mr->guest_phys_addr =
- (uint64_t)(uintptr_t)seg->addr;
- mr->userspace_addr =
- (uint64_t)(uintptr_t)seg->addr;
- mr->memory_size += seg->len;
- new_region = 0;
- break;
- }
- }
-
- if (new_region == 0)
- continue;
-
- mr = &vm->regions[k++];
- /* use vaddr here! */
- mr->guest_phys_addr = (uint64_t)(uintptr_t)seg->addr;
- mr->userspace_addr = (uint64_t)(uintptr_t)seg->addr;
- mr->memory_size = seg->len;
- mr->mmap_offset = 0;
+ vm->nregions = 0;
+ vm->padding = 0;
- if (k >= max_regions) {
- free(vm);
- return NULL;
- }
+ /*
+ * The memory lock has already been taken by memory subsystem
+ * or virtio_user_start_device().
+ */
+ if (rte_memseg_list_walk_thread_unsafe(add_memseg_list, vm) < 0) {
+ free(vm);
+ return NULL;
}
- vm->nregions = k;
- vm->padding = 0;
return vm;
}
(1ULL << VIRTIO_NET_F_HOST_TSO6) | \
(1ULL << VIRTIO_NET_F_CSUM))
-static int
-tap_supporte_mq(void)
+static unsigned int
+tap_support_features(void)
{
int tapfd;
unsigned int tap_features;
}
close(tapfd);
- return tap_features & IFF_MULTI_QUEUE;
+ return tap_features;
}
static int
struct vhost_memory_kernel *vm = NULL;
int vhostfd;
unsigned int queue_sel;
+ unsigned int features;
PMD_DRV_LOG(INFO, "%s", vhost_msg_strings[req]);
}
if (!ret && req_kernel == VHOST_GET_FEATURES) {
+ features = tap_support_features();
/* with tap as the backend, all these features are supported
* but not claimed by vhost-net, so we add them back when
* reporting to upper layer.
*/
- *((uint64_t *)arg) |= VHOST_KERNEL_GUEST_OFFLOADS_MASK;
- *((uint64_t *)arg) |= VHOST_KERNEL_HOST_OFFLOADS_MASK;
+ if (features & IFF_VNET_HDR) {
+ *((uint64_t *)arg) |= VHOST_KERNEL_GUEST_OFFLOADS_MASK;
+ *((uint64_t *)arg) |= VHOST_KERNEL_HOST_OFFLOADS_MASK;
+ }
/* vhost_kernel will not declare this feature, but it does
* support multi-queue.
*/
- if (tap_supporte_mq())
+ if (features & IFF_MULTI_QUEUE)
*(uint64_t *)arg |= (1ull << VIRTIO_NET_F_MQ);
}
else
hdr_size = sizeof(struct virtio_net_hdr);
- tapfd = vhost_kernel_open_tap(&dev->ifname, hdr_size, req_mq);
+ tapfd = vhost_kernel_open_tap(&dev->ifname, hdr_size, req_mq,
+ (char *)dev->mac_addr, dev->features);
if (tapfd < 0) {
PMD_DRV_LOG(ERR, "fail to open tap for vhost kernel");
return -1;
return 0;
}
-struct virtio_user_backend_ops ops_kernel = {
+struct virtio_user_backend_ops virtio_ops_kernel = {
.setup = vhost_kernel_setup,
.send_request = vhost_kernel_ioctl,
.enable_qp = vhost_kernel_enable_queue_pair
Code Review / deb_dpdk.git / blobdiff