vrend: Fix iovec read/write for depth

The depth was ignored in the fallback path, which caused us to copy
only the first layer.

This fixes:
dEQP-GLES3.functional.shaders.texture_functions.texture.isampler2darray.*
and probably other 3D texture/sample array tests.

Signed-off-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Jakob Bornecrantz <jakob@collabora.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

src/vrend_renderer.c

@@ -4673,26 +4673,30 @@ static void read_transfer_data(struct pipe_resource *res,
                                               box->height) * blsize * box->depth;
    uint32_t bwx = util_format_get_nblocksx(res->format, box->width) * blsize;
    uint32_t bh = util_format_get_nblocksy(res->format, box->height);
-   int h;
+   int d, h;
    uint32_t myoffset = offset;
 
    if ((send_size == size || bh == 1) && !invert)
       vrend_read_from_iovec(iov, num_iovs, offset, data, send_size);
    else {
       if (invert) {
+         for (d = 0; d < box->depth; d++) {
             for (h = bh - 1; h >= 0; h--) {
-            void *ptr = data + (h * bwx);
+               void *ptr = data + (h * bwx) + d * (bh * src_stride);
                vrend_read_from_iovec(iov, num_iovs, myoffset, ptr, bwx);
                myoffset += src_stride;
             }
+         }
       } else {
+         for (d = 0; d < box->depth; d++) {
             for (h = 0; h < bh; h++) {
-            void *ptr = data + (h * bwx);
+               void *ptr = data + (h * bwx) + d * (bh * src_stride);
                vrend_read_from_iovec(iov, num_iovs, myoffset, ptr, bwx);
                myoffset += src_stride;
             }
          }
       }
+   }
 }
 
 static void write_transfer_data(struct pipe_resource *res,
@@ -4711,25 +4715,29 @@ static void write_transfer_data(struct pipe_resource *res,
                                                 box->height) * blsize * box->depth;
    uint32_t bwx = util_format_get_nblocksx(res->format, box->width) * blsize;
    uint32_t bh = util_format_get_nblocksy(res->format, box->height);
-   int h;
+   int d, h;
    uint32_t myoffset = offset;
    uint32_t stride = dst_stride ? dst_stride : util_format_get_nblocksx(res->format, u_minify(res->width0, level)) * blsize;
 
    if ((send_size == size || bh == 1) && !invert) {
       vrend_write_to_iovec(iov, num_iovs, offset, data, send_size);
    } else if (invert) {
+      for (d = 0; d < box->depth; d++) {
          for (h = bh - 1; h >= 0; h--) {
-         void *ptr = data + (h * bwx);
+            void *ptr = data + (h * bwx) + d * (bh * stride);
             vrend_write_to_iovec(iov, num_iovs, myoffset, ptr, bwx);
             myoffset += stride;
          }
+      }
    } else {
+      for (d = 0; d < box->depth; d++) {
          for (h = 0; h < bh; h++) {
-         void *ptr = data + (h * bwx);
+            void *ptr = data + (h * bwx) + d * (bh * stride);
             vrend_write_to_iovec(iov, num_iovs, myoffset, ptr, bwx);
             myoffset += stride;
          }
       }
+   }
 }
 
 static bool check_transfer_bounds(struct vrend_resource *res,