drm: allow removal of legacy codepaths (v4.1)

If you don't want the legacy drivers, then lets get rid of all the
legacy codepaths from the core module.

This drop the size of drm.ko for me by about 10%.
 380515    7422    4192  392129   5fbc1 ../../drm-next-build/drivers/gpu/drm/drm.ko
 351736	   7298	   4192	 363226	  58ada	../../drm-next-build/drivers/gpu/drm/drm.ko

v2: drop drm_lock as well, fix some DMA->DRM typos
v3: avoid ifdefs in mainline code
v4: rework ioctl defs
v4.1: fix nouveau Kconfig

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 12 insertions, 1 deletions

diff --git a/drivers/gpu/drm/drm_ioc32.c b/drivers/gpu/drm/drm_ioc32.c
index 0e3043e08c69..374b372da58a 100644
--- a/drivers/gpu/drm/drm_ioc32.c
+++ b/drivers/gpu/drm/drm_ioc32.c
@@ -156,6 +156,7 @@ static int compat_drm_setunique(struct file *file, unsigned int cmd,
 	return -EINVAL;
 }
 
+#if IS_ENABLED(CONFIG_DRM_LEGACY)
 typedef struct drm_map32 {
 	u32 offset;		/* Requested physical address (0 for SAREA) */
 	u32 size;		/* Requested physical size (bytes) */
@@ -239,6 +240,7 @@ static int compat_drm_rmmap(struct file *file, unsigned int cmd,
 	map.handle = compat_ptr(handle);
 	return drm_ioctl_kernel(file, drm_legacy_rmmap_ioctl, &map, DRM_AUTH);
 }
+#endif
 
 typedef struct drm_client32 {
 	int idx;	/* Which client desired? */
@@ -301,6 +303,7 @@ static int compat_drm_getstats(struct file *file, unsigned int cmd,
 	return 0;
 }
 
+#if IS_ENABLED(CONFIG_DRM_LEGACY)
 typedef struct drm_buf_desc32 {
 	int count;		 /* Number of buffers of this size */
 	int size;		 /* Size in bytes */
@@ -604,6 +607,7 @@ static int compat_drm_dma(struct file *file, unsigned int cmd,
 
 	return 0;
 }
+#endif
 
 #if IS_ENABLED(CONFIG_AGP)
 typedef struct drm_agp_mode32 {
@@ -748,6 +752,7 @@ static int compat_drm_agp_unbind(struct file *file, unsigned int cmd,
 }
 #endif /* CONFIG_AGP */
 
+#if IS_ENABLED(CONFIG_DRM_LEGACY)
 typedef struct drm_scatter_gather32 {
 	u32 size;	/**< In bytes -- will round to page boundary */
 	u32 handle;	/**< Used for mapping / unmapping */
@@ -788,7 +793,7 @@ static int compat_drm_sg_free(struct file *file, unsigned int cmd,
 	return drm_ioctl_kernel(file, drm_legacy_sg_free, &request,
 				DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 }
-
+#endif
 #if defined(CONFIG_X86)
 typedef struct drm_update_draw32 {
 	drm_drawable_t handle;
@@ -903,10 +908,13 @@ static struct {
 #define DRM_IOCTL32_DEF(n, f) [DRM_IOCTL_NR(n##32)] = {.fn = f, .name = #n}
 	DRM_IOCTL32_DEF(DRM_IOCTL_VERSION, compat_drm_version),
 	DRM_IOCTL32_DEF(DRM_IOCTL_GET_UNIQUE, compat_drm_getunique),
+#if IS_ENABLED(CONFIG_DRM_LEGACY)
 	DRM_IOCTL32_DEF(DRM_IOCTL_GET_MAP, compat_drm_getmap),
+#endif
 	DRM_IOCTL32_DEF(DRM_IOCTL_GET_CLIENT, compat_drm_getclient),
 	DRM_IOCTL32_DEF(DRM_IOCTL_GET_STATS, compat_drm_getstats),
 	DRM_IOCTL32_DEF(DRM_IOCTL_SET_UNIQUE, compat_drm_setunique),
+#if IS_ENABLED(CONFIG_DRM_LEGACY)
 	DRM_IOCTL32_DEF(DRM_IOCTL_ADD_MAP, compat_drm_addmap),
 	DRM_IOCTL32_DEF(DRM_IOCTL_ADD_BUFS, compat_drm_addbufs),
 	DRM_IOCTL32_DEF(DRM_IOCTL_MARK_BUFS, compat_drm_markbufs),
@@ -918,6 +926,7 @@ static struct {
 	DRM_IOCTL32_DEF(DRM_IOCTL_GET_SAREA_CTX, compat_drm_getsareactx),
 	DRM_IOCTL32_DEF(DRM_IOCTL_RES_CTX, compat_drm_resctx),
 	DRM_IOCTL32_DEF(DRM_IOCTL_DMA, compat_drm_dma),
+#endif
 #if IS_ENABLED(CONFIG_AGP)
 	DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ENABLE, compat_drm_agp_enable),
 	DRM_IOCTL32_DEF(DRM_IOCTL_AGP_INFO, compat_drm_agp_info),
@@ -926,8 +935,10 @@ static struct {
 	DRM_IOCTL32_DEF(DRM_IOCTL_AGP_BIND, compat_drm_agp_bind),
 	DRM_IOCTL32_DEF(DRM_IOCTL_AGP_UNBIND, compat_drm_agp_unbind),
 #endif
+#if IS_ENABLED(CONFIG_DRM_LEGACY)
 	DRM_IOCTL32_DEF(DRM_IOCTL_SG_ALLOC, compat_drm_sg_alloc),
 	DRM_IOCTL32_DEF(DRM_IOCTL_SG_FREE, compat_drm_sg_free),
+#endif
 #if defined(CONFIG_X86) || defined(CONFIG_IA64)
 	DRM_IOCTL32_DEF(DRM_IOCTL_UPDATE_DRAW, compat_drm_update_draw),
 #endif