import 15.2.0 Octopus source

[ceph.git] / ceph / src / spdk / dpdk / drivers / net / virtio / virtio_ring.h

diff --git a/ceph/src/spdk/dpdk/drivers/net/virtio/virtio_ring.h b/ceph/src/spdk/dpdk/drivers/net/virtio/virtio_ring.h
index 9e3c2a01525afcd664e1ab0e3e56de1ae027fdc0..7ba34662e55969db5e35544dd79a58bbeafb97d0 100644 (file)
--- a/ceph/src/spdk/dpdk/drivers/net/virtio/virtio_ring.h
+++ b/ceph/src/spdk/dpdk/drivers/net/virtio/virtio_ring.h
@@ -16,6 +16,15 @@
 /* This means the buffer contains a list of buffer descriptors. */
 #define VRING_DESC_F_INDIRECT   4
 
+/* This flag means the descriptor was made available by the driver */
+#define VRING_PACKED_DESC_F_AVAIL      (1 << 7)
+/* This flag means the descriptor was used by the device */
+#define VRING_PACKED_DESC_F_USED       (1 << 15)
+
+/* Frequently used combinations */
+#define VRING_PACKED_DESC_F_AVAIL_USED (VRING_PACKED_DESC_F_AVAIL | \
+                                        VRING_PACKED_DESC_F_USED)
+
 /* The Host uses this in used->flags to advise the Guest: don't kick me
  * when you add a buffer.  It's unreliable, so it's simply an
  * optimization.  Guest will still kick if it's out of buffers. */
@@ -54,6 +63,31 @@ struct vring_used {
        struct vring_used_elem ring[0];
 };
 
+/* For support of packed virtqueues in Virtio 1.1 the format of descriptors
+ * looks like this.
+ */
+struct vring_packed_desc {
+       uint64_t addr;
+       uint32_t len;
+       uint16_t id;
+       uint16_t flags;
+};
+
+#define RING_EVENT_FLAGS_ENABLE 0x0
+#define RING_EVENT_FLAGS_DISABLE 0x1
+#define RING_EVENT_FLAGS_DESC 0x2
+struct vring_packed_desc_event {
+       uint16_t desc_event_off_wrap;
+       uint16_t desc_event_flags;
+};
+
+struct vring_packed {
+       unsigned int num;
+       struct vring_packed_desc *desc;
+       struct vring_packed_desc_event *driver;
+       struct vring_packed_desc_event *device;
+};
+
 struct vring {
        unsigned int num;
        struct vring_desc  *desc;
@@ -95,10 +129,18 @@ struct vring {
 #define vring_avail_event(vr) (*(uint16_t *)&(vr)->used->ring[(vr)->num])
 
 static inline size_t
-vring_size(unsigned int num, unsigned long align)
+vring_size(struct virtio_hw *hw, unsigned int num, unsigned long align)
 {
        size_t size;
 
+       if (vtpci_packed_queue(hw)) {
+               size = num * sizeof(struct vring_packed_desc);
+               size += sizeof(struct vring_packed_desc_event);
+               size = RTE_ALIGN_CEIL(size, align);
+               size += sizeof(struct vring_packed_desc_event);
+               return size;
+       }
+
        size = num * sizeof(struct vring_desc);
        size += sizeof(struct vring_avail) + (num * sizeof(uint16_t));
        size = RTE_ALIGN_CEIL(size, align);
@@ -106,10 +148,9 @@ vring_size(unsigned int num, unsigned long align)
                (num * sizeof(struct vring_used_elem));
        return size;
 }
-
 static inline void
-vring_init(struct vring *vr, unsigned int num, uint8_t *p,
-       unsigned long align)
+vring_init_split(struct vring *vr, uint8_t *p, unsigned long align,
+        unsigned int num)
 {
        vr->num = num;
        vr->desc = (struct vring_desc *) p;
@@ -119,6 +160,19 @@ vring_init(struct vring *vr, unsigned int num, uint8_t *p,
                RTE_ALIGN_CEIL((uintptr_t)(&vr->avail->ring[num]), align);
 }
 
+static inline void
+vring_init_packed(struct vring_packed *vr, uint8_t *p, unsigned long align,
+                unsigned int num)
+{
+       vr->num = num;
+       vr->desc = (struct vring_packed_desc *)p;
+       vr->driver = (struct vring_packed_desc_event *)(p +
+                       vr->num * sizeof(struct vring_packed_desc));
+       vr->device = (struct vring_packed_desc_event *)
+               RTE_ALIGN_CEIL(((uintptr_t)vr->driver +
+                               sizeof(struct vring_packed_desc_event)), align);
+}
+
 /*
  * The following is used with VIRTIO_RING_F_EVENT_IDX.
  * Assuming a given event_idx value from the other size, if we have