anv: Use bindless textures and samplers

This commit changes anv to put bindless handles and sampler pointers
into the descriptor buffer and use those instead of bindful when we run
out of binding table space.  This "spilling" of descriptors allows to to
advertise an almost unbounded number of images and samplers.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>

src/intel/vulkan/genX_state.c

@@ -328,6 +328,8 @@ VkResult genX(CreateSampler)(
     VkSampler*                                  pSampler)
 {
    ANV_FROM_HANDLE(anv_device, device, _device);
+   const struct anv_physical_device *pdevice =
+      &device->instance->physicalDevice;
    struct anv_sampler *sampler;
 
    assert(pCreateInfo->sType == VK_STRUCTURE_TYPE_SAMPLER_CREATE_INFO);
@@ -383,6 +385,17 @@ VkResult genX(CreateSampler)(
       }
    }
 
+   if (pdevice->has_bindless_samplers) {
+      /* If we have bindless, allocate enough samplers.  We allocate 32 bytes
+       * for each sampler instead of 16 bytes because we want all bindless
+       * samplers to be 32-byte aligned so we don't have to use indirect
+       * sampler messages on them.
+       */
+      sampler->bindless_state =
+         anv_state_pool_alloc(&device->dynamic_state_pool,
+                              sampler->n_planes * 32, 32);
+   }
+
    for (unsigned p = 0; p < sampler->n_planes; p++) {
       const bool plane_has_chroma =
          sampler->conversion && sampler->conversion->format->planes[p].has_chroma;
@@ -452,6 +465,11 @@ VkResult genX(CreateSampler)(
       };
 
       GENX(SAMPLER_STATE_pack)(NULL, sampler->state[p], &sampler_state);
+
+      if (sampler->bindless_state.map) {
+         memcpy(sampler->bindless_state.map + p * 32,
+                sampler->state[p], GENX(SAMPLER_STATE_length) * 4);
+      }
    }
 
    *pSampler = anv_sampler_to_handle(sampler);