tu: Align BO size to page size

The kernel was rounding the size up for us, but it doesn't like a
non-aligned map size, so just sanitize the size here.

tu_cs was relying on the size not being rounded to keep the maximum size
2^20-1 or less, so fix that by using the initial unrounded size.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32533>

src/freedreno/vulkan/tu_cs.cc

@@ -176,7 +176,7 @@ tu_cs_add_bo(struct tu_cs *cs, uint32_t size)
    bos->bos[bos->bo_count++] = new_bo;
 
    cs->start = cs->cur = cs->reserved_end = (uint32_t *) new_bo->map;
-   cs->end = cs->start + new_bo->size / sizeof(uint32_t);
+   cs->end = cs->start + size;
 
    return VK_SUCCESS;
 }

src/freedreno/vulkan/tu_knl.cc

@@ -40,6 +40,8 @@ tu_bo_init_new_explicit_iova(struct tu_device *dev,
    MESA_TRACE_FUNC();
    struct tu_instance *instance = dev->physical_device->instance;
 
+   size = align64(size, os_page_size);
+
    VkResult result =
       dev->instance->knl->bo_init(dev, base, out_bo, size, client_iova,
                                   mem_property, flags, name);
@@ -65,6 +67,7 @@ tu_bo_init_dmabuf(struct tu_device *dev,
                   uint64_t size,
                   int fd)
 {
+   size = align64(size, os_page_size);
    VkResult result = dev->instance->knl->bo_init_dmabuf(dev, bo, size, fd);
    if (result != VK_SUCCESS)
       return result;