Changeset 9af56b6 in mainline for uspace/lib/virtio/virtio.c

Timestamp:

2018-05-23T21:12:28Z (6 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

31cf8c3c

Parents:

85be731

git-author:

Jakub Jermar <jakub@…> (2018-05-23 21:12:24)

git-committer:

Jakub Jermar <jakub@…> (2018-05-23 21:12:28)

Message:

Use little-endian accessors for virtio PIO

File:

• uspace/lib/virtio/virtio.c (modified) (8 diffs)

uspace/lib/virtio/virtio.c

@@ -43 +43 @@
 {
         virtq_desc_t *d = &vdev->queues[num].desc[descno];
-        pio_write_64(&d->addr, addr);
-        pio_write_32(&d->len, len);
-        pio_write_16(&d->flags, flags);
-        pio_write_16(&d->next, next);
+        pio_write_le64(&d->addr, addr);
+        pio_write_le32(&d->len, len);
+        pio_write_le16(&d->flags, flags);
+        pio_write_le16(&d->next, next);
 }
 
@@ -54 +54 @@
         virtq_t *q = &vdev->queues[num];
 
-        uint16_t idx = pio_read_16(&q->avail->idx);
-        pio_write_16(&q->avail->ring[idx], descno);
+        uint16_t idx = pio_read_le16(&q->avail->idx);
+        pio_write_le16(&q->avail->ring[idx], descno);
         write_barrier();
-        pio_write_16(&q->avail->idx, (idx + 1) % q->queue_size);
+        pio_write_le16(&q->avail->idx, (idx + 1) % q->queue_size);
         write_barrier();
-        pio_write_16(q->notify, num);
+        pio_write_le16(q->notify, num);
 }
 
@@ -68 +68 @@
 
         /* Program the queue of our interest */
-        pio_write_16(&cfg->queue_select, num);
+        pio_write_le16(&cfg->queue_select, num);
 
         /* Trim the size of the queue as needed */
@@ -75 +75 @@
                 return ENOMEM;
         }
-        pio_write_16(&cfg->queue_size, size);
+        pio_write_le16(&cfg->queue_size, size);
         ddf_msg(LVL_NOTE, "Virtq %u: %u descriptors", num, (unsigned) size);
 
@@ -126 +126 @@
          * Write the configured addresses to device's common config
          */
-        pio_write_64(&cfg->queue_desc, q->phys);
-        pio_write_64(&cfg->queue_avail, q->phys + avail_offset);
-        pio_write_64(&cfg->queue_used, q->phys + used_offset);
+        pio_write_le64(&cfg->queue_desc, q->phys);
+        pio_write_le64(&cfg->queue_avail, q->phys + avail_offset);
+        pio_write_le64(&cfg->queue_used, q->phys + used_offset);
 
         ddf_msg(LVL_NOTE, "DMA memory for virtq %d: virt=%p, phys=%p, size=%zu",
@@ -135 +135 @@
         /* Determine virtq's notification address */
         q->notify = vdev->notify_base +
-            pio_read_16(&cfg->queue_notif_off) * vdev->notify_off_multiplier;
+            pio_read_le16(&cfg->queue_notif_off) * vdev->notify_off_multiplier;
 
         ddf_msg(LVL_NOTE, "notification register: %p", q->notify);
@@ -170 +170 @@
 
         /* 4. Read the offered feature flags */
-        pio_write_32(&cfg->device_feature_select, VIRTIO_FEATURES_0_31);
-        uint32_t device_features = pio_read_32(&cfg->device_feature);
+        pio_write_le32(&cfg->device_feature_select, VIRTIO_FEATURES_0_31);
+        uint32_t device_features = pio_read_le32(&cfg->device_feature);
 
         ddf_msg(LVL_NOTE, "offered features %x", device_features);
@@ -180 +180 @@
 
         /* 4. Write the accepted feature flags */
-        pio_write_32(&cfg->driver_feature_select, VIRTIO_FEATURES_0_31);
-        pio_write_32(&cfg->driver_feature, features);
+        pio_write_le32(&cfg->driver_feature_select, VIRTIO_FEATURES_0_31);
+        pio_write_le32(&cfg->driver_feature, features);
 
         ddf_msg(LVL_NOTE, "accepted features %x", features);