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authorDamjan Marion <damarion@cisco.com>2018-09-30 18:26:20 +0200
committerDamjan Marion <dmarion@me.com>2018-10-23 14:21:10 +0000
commit68b4da67deb2e8ca224bb5abaeb9dbc7ae8e378c (patch)
treecd1ee2c463aefdb31c73665eafb876568054f49e /src/vlib/linux/vfio.c
parentfc3b8b8ad08d2d4cc375149ecdc10c37d4a80940 (diff)
Numa-aware, growable physical memory allocator (pmalloc)
Change-Id: Ic4c46bc733afae8bf0d8146623ed15633928de30 Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src/vlib/linux/vfio.c')
-rw-r--r--src/vlib/linux/vfio.c68
1 files changed, 31 insertions, 37 deletions
diff --git a/src/vlib/linux/vfio.c b/src/vlib/linux/vfio.c
index e72f10388ca..d300a683dd7 100644
--- a/src/vlib/linux/vfio.c
+++ b/src/vlib/linux/vfio.c
@@ -34,52 +34,46 @@
linux_vfio_main_t vfio_main;
-static int
-vfio_map_regions (vlib_main_t * vm, int fd)
+clib_error_t *
+vfio_map_physmem_page (vlib_main_t * vm, void *addr)
{
- vlib_physmem_main_t *vpm = &physmem_main;
+ vlib_physmem_main_t *vpm = &vm->physmem_main;
linux_vfio_main_t *lvm = &vfio_main;
- vlib_physmem_region_t *pr;
struct vfio_iommu_type1_dma_map dm = { 0 };
- int i;
+ uword log2_page_size = vpm->pmalloc_main->log2_page_sz;
+ uword physmem_start = pointer_to_uword (vpm->pmalloc_main->base);
+
+ if (lvm->container_fd == -1)
+ return clib_error_return (0, "No cointainer fd");
+
+ u32 page_index = vlib_physmem_get_page_index (vm, addr);
+
+ if (clib_bitmap_get (lvm->physmem_pages_mapped, page_index))
+ {
+ vlib_log_debug (lvm->log_default, "map DMA va:%p page:%u already "
+ "mapped", addr, page_index);
+ return 0;
+ }
dm.argsz = sizeof (struct vfio_iommu_type1_dma_map);
dm.flags = VFIO_DMA_MAP_FLAG_READ | VFIO_DMA_MAP_FLAG_WRITE;
+ dm.vaddr = physmem_start + (page_index << log2_page_size);
+ dm.size = 1ULL << log2_page_size;
+ dm.iova = dm.vaddr;
+ vlib_log_debug (lvm->log_default, "map DMA page:%u va:0x%lx iova:%lx "
+ "size:0x%lx", page_index, dm.vaddr, dm.iova, dm.size);
- /* *INDENT-OFF* */
- pool_foreach (pr, vpm->regions,
+ if (ioctl (lvm->container_fd, VFIO_IOMMU_MAP_DMA, &dm) == -1)
{
- vec_foreach_index (i, pr->page_table)
- {
- int rv;
- dm.vaddr = pointer_to_uword (pr->mem) + ((u64)i << pr->log2_page_size);
- dm.size = 1ull << pr->log2_page_size;
- dm.iova = dm.vaddr;
- vlib_log_debug (lvm->log_default, "map DMA va:0x%lx iova:%lx "
- "size:0x%lx", dm.vaddr, dm.iova, dm.size);
-
- if ((rv = ioctl (fd, VFIO_IOMMU_MAP_DMA, &dm)) &&
- errno != EINVAL)
- {
- vlib_log_err (lvm->log_default, "map DMA va:0x%lx iova:%lx "
- "size:0x%lx failed, error %s (errno %d)",
- dm.vaddr, dm.iova, dm.size, strerror (errno),
- errno);
- return rv;
- }
- }
- });
- /* *INDENT-ON* */
- return 0;
-}
-
-void
-linux_vfio_dma_map_regions (vlib_main_t * vm)
-{
- linux_vfio_main_t *lvm = &vfio_main;
+ vlib_log_err (lvm->log_default, "map DMA page:%u va:0x%lx iova:%lx "
+ "size:0x%lx failed, error %s (errno %d)", page_index,
+ dm.vaddr, dm.iova, dm.size, strerror (errno), errno);
+ return clib_error_return_unix (0, "physmem DMA map failed");
+ }
- if (lvm->container_fd != -1)
- vfio_map_regions (vm, lvm->container_fd);
+ lvm->physmem_pages_mapped = clib_bitmap_set (lvm->physmem_pages_mapped,
+ page_index, 1);
+ return 0;
}
static linux_pci_vfio_iommu_group_t *