iris: Replace bo->real.local with bo->real.heap

We'll want to describe more than two placement options for BOs. Switch
to using the more flexible heap enum.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14012>

src/gallium/drivers/iris/iris_batch.c

@@ -113,7 +113,7 @@ dump_bo_list(struct iris_batch *batch)
               backing->gem_handle,
               bo->name,
               bo->address,
-              backing->real.local ? "local" : "system",
+              iris_heap_to_string[backing->real.heap],
               bo->size,
               bo->refcount,
               written ? " write" : "",

src/gallium/drivers/iris/iris_bufmgr.c

@@ -171,12 +171,6 @@ struct iris_memregion {
 
 #define NUM_SLAB_ALLOCATORS 3
 
-enum iris_heap {
-   IRIS_HEAP_SYSTEM_MEMORY,
-   IRIS_HEAP_DEVICE_LOCAL,
-   IRIS_HEAP_MAX,
-};
-
 struct iris_slab {
    struct pb_slab base;
 
@@ -960,7 +954,7 @@ alloc_fresh_bo(struct iris_bufmgr *bufmgr, uint64_t bo_size, bool local)
    bo->bufmgr = bufmgr;
    bo->size = bo_size;
    bo->idle = true;
-   bo->real.local = local;
+   bo->real.heap = local ? IRIS_HEAP_DEVICE_LOCAL : IRIS_HEAP_SYSTEM_MEMORY;
 
    if (bufmgr->vram.size == 0) {
       /* Calling set_domain() will allocate pages for the BO outside of the
@@ -979,6 +973,12 @@ alloc_fresh_bo(struct iris_bufmgr *bufmgr, uint64_t bo_size, bool local)
    return bo;
 }
 
+const char *
+iris_heap_to_string[IRIS_HEAP_MAX] = {
+   [IRIS_HEAP_SYSTEM_MEMORY] = "system",
+   [IRIS_HEAP_DEVICE_LOCAL] = "local",
+};
+
 struct iris_bo *
 iris_bo_alloc(struct iris_bufmgr *bufmgr,
               const char *name,
@@ -1076,7 +1076,7 @@ iris_bo_alloc(struct iris_bufmgr *bufmgr,
    }
 
    DBG("bo_create: buf %d (%s) (%s memzone) (%s) %llub\n", bo->gem_handle,
-       bo->name, memzone_name(memzone), bo->real.local ? "local" : "system",
+       bo->name, memzone_name(memzone), iris_heap_to_string[bo->real.heap],
        (unsigned long long) size);
 
    return bo;
@@ -1351,7 +1351,8 @@ bo_unreference_final(struct iris_bo *bo, time_t time)
 
    bucket = NULL;
    if (bo->real.reusable)
-      bucket = bucket_for_size(bufmgr, bo->size, bo->real.local);
+      bucket = bucket_for_size(bufmgr, bo->size,
+                               bo->real.heap != IRIS_HEAP_SYSTEM_MEMORY);
    /* Put the buffer into our internal cache for reuse if we can. */
    if (bucket && iris_bo_madvise(bo, I915_MADV_DONTNEED)) {
       bo->real.free_time = time;
@@ -1478,7 +1479,7 @@ iris_bo_gem_mmap_offset(struct pipe_debug_callback *dbg, struct iris_bo *bo)
        * across PCIe, it's always snooped.  The only caching mode allowed by
        * DG1 hardware for LMEM is WC.
        */
-      if (bo->real.local)
+      if (bo->real.heap != IRIS_HEAP_SYSTEM_MEMORY)
          assert(bo->real.mmap_mode == IRIS_MMAP_WC);
       else
          assert(bo->real.mmap_mode == IRIS_MMAP_WB);

src/gallium/drivers/iris/iris_bufmgr.h

@@ -137,6 +137,14 @@ enum iris_mmap_mode {
    IRIS_MMAP_WB, /**< Write-back mapping with CPU caches enabled */
 };
 
+enum iris_heap {
+   IRIS_HEAP_SYSTEM_MEMORY,
+   IRIS_HEAP_DEVICE_LOCAL,
+   IRIS_HEAP_MAX,
+};
+
+extern const char *iris_heap_to_string[];
+
 #define IRIS_BATCH_COUNT 2
 
 struct iris_bo_screen_deps {
@@ -244,6 +252,9 @@ struct iris_bo {
          /** The mmap coherency mode selected at BO allocation time */
          enum iris_mmap_mode mmap_mode;
 
+         /** The heap selected at BO allocation time */
+         enum iris_heap heap;
+
          /** Was this buffer imported from an external client? */
          bool imported;
 
@@ -255,9 +266,6 @@ struct iris_bo {
 
          /** Boolean of whether this buffer points into user memory */
          bool userptr;
-
-         /** Boolean of whether this was allocated from local memory */
-         bool local;
       } real;
       struct {
          struct pb_slab_entry entry;