drm/ttm: add NUMA node id to the pool

This allows backing ttm_tt structure with pages from different NUMA
pools.

Tested-by: Graham Sider <graham.sider@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Author: rajbhar

drivers/gpu/drm/ttm/ttm_device.c

@@ -213,7 +213,7 @@ int ttm_device_init(struct ttm_device *bdev, struct ttm_device_funcs *funcs,
 	bdev->funcs = funcs;
 
 	ttm_sys_man_init(bdev);
-	ttm_pool_init(&bdev->pool, dev, use_dma_alloc, use_dma32);
+	ttm_pool_init(&bdev->pool, dev, NUMA_NO_NODE, use_dma_alloc, use_dma32);
 
 	bdev->vma_manager = vma_manager;
 	spin_lock_init(&bdev->lru_lock);

drivers/gpu/drm/ttm/ttm_pool.c

@@ -98,7 +98,7 @@ static struct page *ttm_pool_alloc_page(struct ttm_pool *pool, gfp_t gfp_flags,
 			__GFP_KSWAPD_RECLAIM;
 
 	if (!pool->use_dma_alloc) {
-		p = alloc_pages(gfp_flags, order);
+		p = alloc_pages_node(pool->nid, gfp_flags, order);
 		if (p)
 			p->private = order;
 		return p;
@@ -292,7 +292,7 @@ static struct ttm_pool_type *ttm_pool_select_type(struct ttm_pool *pool,
 						  enum ttm_caching caching,
 						  unsigned int order)
 {
-	if (pool->use_dma_alloc)
+	if (pool->use_dma_alloc || pool->nid != NUMA_NO_NODE)
 		return &pool->caching[caching].orders[order];
 
 #ifdef CONFIG_X86
@@ -550,29 +550,32 @@ EXPORT_SYMBOL(ttm_pool_free);
  *
  * @pool: the pool to initialize
  * @dev: device for DMA allocations and mappings
+ * @nid: NUMA node to use for allocations
  * @use_dma_alloc: true if coherent DMA alloc should be used
  * @use_dma32: true if GFP_DMA32 should be used
  *
  * Initialize the pool and its pool types.
  */
 void ttm_pool_init(struct ttm_pool *pool, struct device *dev,
-		   bool use_dma_alloc, bool use_dma32)
+		   int nid, bool use_dma_alloc, bool use_dma32)
 {
 	unsigned int i, j;
 
 	WARN_ON(!dev && use_dma_alloc);
 
 	pool->dev = dev;
+	pool->nid = nid;
 	pool->use_dma_alloc = use_dma_alloc;
 	pool->use_dma32 = use_dma32;
 
-	if (use_dma_alloc) {
+	if (use_dma_alloc || nid != NUMA_NO_NODE) {
 		for (i = 0; i < TTM_NUM_CACHING_TYPES; ++i)
 			for (j = 0; j < TTM_DIM_ORDER; ++j)
 				ttm_pool_type_init(&pool->caching[i].orders[j],
 						   pool, i, j);
 	}
 }
+EXPORT_SYMBOL(ttm_pool_init);
 
 /**
  * ttm_pool_fini - Cleanup a pool
@@ -586,7 +589,7 @@ void ttm_pool_fini(struct ttm_pool *pool)
 {
 	unsigned int i, j;
 
-	if (pool->use_dma_alloc) {
+	if (pool->use_dma_alloc || pool->nid != NUMA_NO_NODE) {
 		for (i = 0; i < TTM_NUM_CACHING_TYPES; ++i)
 			for (j = 0; j < TTM_DIM_ORDER; ++j)
 				ttm_pool_type_fini(&pool->caching[i].orders[j]);

include/drm/ttm/ttm_pool.h

@@ -61,12 +61,14 @@ struct ttm_pool_type {
  * struct ttm_pool - Pool for all caching and orders
  *
  * @dev: the device we allocate pages for
+ * @nid: which numa node to use
  * @use_dma_alloc: if coherent DMA allocations should be used
  * @use_dma32: if GFP_DMA32 should be used
  * @caching: pools for each caching/order
  */
 struct ttm_pool {
 	struct device *dev;
+	int nid;
 
 	bool use_dma_alloc;
 	bool use_dma32;
@@ -81,7 +83,7 @@ int ttm_pool_alloc(struct ttm_pool *pool, struct ttm_tt *tt,
 void ttm_pool_free(struct ttm_pool *pool, struct ttm_tt *tt);
 
 void ttm_pool_init(struct ttm_pool *pool, struct device *dev,
-		   bool use_dma_alloc, bool use_dma32);
+		   int nid, bool use_dma_alloc, bool use_dma32);
 void ttm_pool_fini(struct ttm_pool *pool);
 
 int ttm_pool_debugfs(struct ttm_pool *pool, struct seq_file *m);