From: Xiaolei Wang <xiaolei.wang@windriver.com>
Date: Tue, 1 Oct 2024 23:34:30 +0000 (+0800)
Subject: drm/etnaviv: Request pages from DMA32 zone on addressing_limited
X-Git-Tag: v6.13-rc1~122^2~3^2~16
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=13c96ac9a3f0f1c7ba1ff0656ea508e7fa065e7e;p=thirdparty%2Flinux.git

drm/etnaviv: Request pages from DMA32 zone on addressing_limited

Remove __GFP_HIGHMEM when requesting a page from DMA32 zone,
and since all vivante GPUs in the system will share the same
DMA constraints, move the check of whether to get a page from
DMA32 to etnaviv_bind().

Fixes: b72af445cd38 ("drm/etnaviv: request pages from DMA32 zone when needed")
Suggested-by: Sui Jingfeng <sui.jingfeng@linux.dev>
Signed-off-by: Xiaolei Wang <xiaolei.wang@windriver.com>
Reviewed-by: Christian Gmeiner <cgmeiner@igalia.com>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
---

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_drv.c b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
index 6500f3999c5fa..19ec67a5a918e 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_drv.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
@@ -538,6 +538,16 @@ static int etnaviv_bind(struct device *dev)
 	priv->num_gpus = 0;
 	priv->shm_gfp_mask = GFP_HIGHUSER | __GFP_RETRY_MAYFAIL | __GFP_NOWARN;
 
+	/*
+	 * If the GPU is part of a system with DMA addressing limitations,
+	 * request pages for our SHM backend buffers from the DMA32 zone to
+	 * hopefully avoid performance killing SWIOTLB bounce buffering.
+	 */
+	if (dma_addressing_limited(dev)) {
+		priv->shm_gfp_mask |= GFP_DMA32;
+		priv->shm_gfp_mask &= ~__GFP_HIGHMEM;
+	}
+
 	priv->cmdbuf_suballoc = etnaviv_cmdbuf_suballoc_new(drm->dev);
 	if (IS_ERR(priv->cmdbuf_suballoc)) {
 		dev_err(drm->dev, "Failed to create cmdbuf suballocator\n");
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
index 7c7f97793ddd0..5e753dd42f721 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
@@ -839,14 +839,6 @@ int etnaviv_gpu_init(struct etnaviv_gpu *gpu)
 	if (ret)
 		goto fail;
 
-	/*
-	 * If the GPU is part of a system with DMA addressing limitations,
-	 * request pages for our SHM backend buffers from the DMA32 zone to
-	 * hopefully avoid performance killing SWIOTLB bounce buffering.
-	 */
-	if (dma_addressing_limited(gpu->dev))
-		priv->shm_gfp_mask |= GFP_DMA32;
-
 	/* Create buffer: */
 	ret = etnaviv_cmdbuf_init(priv->cmdbuf_suballoc, &gpu->buffer,
 				  PAGE_SIZE);