linux-kernel - [PATCH v15 18/19] drm/etnaviv: Allow userspace specify the domain of etnaviv GEM buffer object

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Message-ID: <20240908094357.291862-19-sui.jingfeng@linux.dev>
Date: Sun,  8 Sep 2024 17:43:56 +0800
From: Sui Jingfeng <sui.jingfeng@...ux.dev>
To: Lucas Stach <l.stach@...gutronix.de>
Cc: Christian Gmeiner <christian.gmeiner@...il.com>,
	Russell King <linux+etnaviv@...linux.org.uk>,
	dri-devel@...ts.freedesktop.org,
	etnaviv@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	Sui Jingfeng <sui.jingfeng@...ux.dev>
Subject: [PATCH v15 18/19] drm/etnaviv: Allow userspace specify the domain of etnaviv GEM buffer object

Otherwise we don't know where a etnaviv GEM buffer object should put when
we create it at userspace.

Signed-off-by: Sui Jingfeng <sui.jingfeng@...ux.dev>
---
 drivers/gpu/drm/etnaviv/etnaviv_drv.c |  9 +++++++++
 include/uapi/drm/etnaviv_drm.h        | 12 ++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_drv.c b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
index f10661fe079f..cdc62f64b200 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_drv.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
@@ -331,11 +331,20 @@ static int etnaviv_ioctl_gem_new(struct drm_device *dev, void *data,
 		struct drm_file *file)
 {
 	struct drm_etnaviv_gem_new *args = data;
+	u32 domain;
+
+	domain = args->flags & ETNA_BO_DOMAIN_MASK;
+
+	args->flags &= ~ETNA_BO_DOMAIN_MASK;
 
 	if (args->flags & ~(ETNA_BO_CACHED | ETNA_BO_WC | ETNA_BO_UNCACHED |
 			    ETNA_BO_FORCE_MMU))
 		return -EINVAL;
 
+	if (domain == ETNA_BO_PL_VRAM)
+		return etnaviv_gem_new_vram(dev, file, args->size,
+					    args->flags, &args->handle);
+
 	return etnaviv_gem_new_handle(dev, file, args->size,
 			args->flags, &args->handle);
 }
diff --git a/include/uapi/drm/etnaviv_drm.h b/include/uapi/drm/etnaviv_drm.h
index 61eaa8cd0f5e..00e778c9d312 100644
--- a/include/uapi/drm/etnaviv_drm.h
+++ b/include/uapi/drm/etnaviv_drm.h
@@ -99,6 +99,18 @@ struct drm_etnaviv_param {
 /* map flags */
 #define ETNA_BO_FORCE_MMU    0x00100000
 
+/* domain (placement) flags */
+#define ETNA_BO_DOMAIN_MASK  0x00f00000
+
+/* CPU accessible, GPU accessible pages in dedicated VRAM */
+#define ETNA_BO_PL_VRAM      0x01000000
+/* CPU accessible, GPU accessible pages in SHMEM */
+#define ETNA_BO_PL_GTT       0x02000000
+/* Userspace allocated memory, at least CPU accessible */
+#define ETNA_BO_PL_USERPTR   0x08000000
+/* GPU accessible but CPU not accessible private VRAM pages */
+#define ETNA_BO_PL_PRIV      0x04000000
+
 struct drm_etnaviv_gem_new {
 	__u64 size;           /* in */
 	__u32 flags;          /* in, mask of ETNA_BO_x */
-- 
2.43.0