drm/vmwgfx: Make all surfaces shareable

There is no real need to have a separate pool for shareable and
non-shareable surfaces. Make all surfaces shareable, regardless of whether
the drm_vmw_surface_flag_shareable has been specified.
Signed-off-by: Maaz Mombasawala <maaz.mombasawala@broadcom.com>
Reviewed-by: Martin Krastev <martin.krastev@broadcom.com>
Signed-off-by: Zack Rusin <zack.rusin@broadcom.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240126200804.732454-3-zack.rusin@broadcom.com

drivers/gpu/drm/vmwgfx/ttm_object.c

 /* SPDX-License-Identifier: GPL-2.0 OR MIT */
 /**************************************************************************
  *
- * Copyright (c) 2009-2022 VMware, Inc., Palo Alto, CA., USA
+ * Copyright (c) 2009-2023 VMware, Inc., Palo Alto, CA., USA
  * All Rights Reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
@@ -648,7 +648,6 @@ int ttm_prime_handle_to_fd(struct ttm_object_file *tfile,
  * @tfile: struct ttm_object_file identifying the caller
  * @size: The size of the dma_bufs we export.
  * @prime: The object to be initialized.
- * @shareable: See ttm_base_object_init
  * @type: See ttm_base_object_init
  * @refcount_release: See ttm_base_object_init
  *
@@ -656,10 +655,11 @@ int ttm_prime_handle_to_fd(struct ttm_object_file *tfile,
  * for data sharing between processes and devices.
  */
 int ttm_prime_object_init(struct ttm_object_file *tfile, size_t size,
-			  struct ttm_prime_object *prime, bool shareable,
+			  struct ttm_prime_object *prime,
 			  enum ttm_object_type type,
 			  void (*refcount_release) (struct ttm_base_object **))
 {
+	bool shareable = !!(type == VMW_RES_SURFACE);
 	mutex_init(&prime->mutex);
 	prime->size = PAGE_ALIGN(size);
 	prime->real_type = type;

drivers/gpu/drm/vmwgfx/ttm_object.h

 /**************************************************************************
  *
- * Copyright (c) 2006-2022 VMware, Inc., Palo Alto, CA., USA
+ * Copyright (c) 2006-2023 VMware, Inc., Palo Alto, CA., USA
  * All Rights Reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
@@ -288,7 +288,6 @@ extern void ttm_object_device_release(struct ttm_object_device **p_tdev);
 extern int ttm_prime_object_init(struct ttm_object_file *tfile,
 				 size_t size,
 				 struct ttm_prime_object *prime,
-				 bool shareable,
 				 enum ttm_object_type type,
 				 void (*refcount_release)
 				 (struct ttm_base_object **));

drivers/gpu/drm/vmwgfx/vmwgfx_surface.c

@@ -832,8 +832,6 @@ int vmw_surface_define_ioctl(struct drm_device *dev, void *data,
 		srf->snooper.image = NULL;
 	}
 
-	user_srf->prime.base.shareable = false;
-	user_srf->prime.base.tfile = NULL;
 	if (drm_is_primary_client(file_priv))
 		user_srf->master = drm_file_get_master(file_priv);
 
@@ -847,10 +845,10 @@ int vmw_surface_define_ioctl(struct drm_device *dev, void *data,
 		goto out_unlock;
 
 	/*
-	 * A gb-aware client referencing a shared surface will
-	 * expect a backup buffer to be present.
+	 * A gb-aware client referencing a surface will expect a backup
+	 * buffer to be present.
 	 */
-	if (dev_priv->has_mob && req->shareable) {
+	if (dev_priv->has_mob) {
 		struct vmw_bo_params params = {
 			.domain = VMW_BO_DOMAIN_SYS,
 			.busy_domain = VMW_BO_DOMAIN_SYS,
@@ -869,8 +867,9 @@ int vmw_surface_define_ioctl(struct drm_device *dev, void *data,
 	}
 
 	tmp = vmw_resource_reference(&srf->res);
-	ret = ttm_prime_object_init(tfile, res->guest_memory_size, &user_srf->prime,
-				    req->shareable, VMW_RES_SURFACE,
+	ret = ttm_prime_object_init(tfile, res->guest_memory_size,
+				    &user_srf->prime,
+				    VMW_RES_SURFACE,
 				    &vmw_user_surface_base_release);
 
 	if (unlikely(ret != 0)) {
@@ -1549,8 +1548,6 @@ vmw_gb_surface_define_internal(struct drm_device *dev,
 
 	tmp = vmw_resource_reference(res);
 	ret = ttm_prime_object_init(tfile, res->guest_memory_size, &user_srf->prime,
-				    req->base.drm_surface_flags &
-				    drm_vmw_surface_flag_shareable,
 				    VMW_RES_SURFACE,
 				    &vmw_user_surface_base_release);
 
@@ -2052,8 +2049,6 @@ int vmw_gb_surface_define(struct vmw_private *dev_priv,
 	}
 
 	*srf_out  = &user_srf->srf;
-	user_srf->prime.base.shareable = false;
-	user_srf->prime.base.tfile = NULL;
 
 	srf = &user_srf->srf;
 	srf->metadata = *req;

include/uapi/drm/vmwgfx_drm.h

 /**************************************************************************
  *
- * Copyright © 2009-2022 VMware, Inc., Palo Alto, CA., USA
+ * Copyright © 2009-2023 VMware, Inc., Palo Alto, CA., USA
  * All Rights Reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
@@ -902,7 +902,8 @@ struct drm_vmw_shader_arg {
 /**
  * enum drm_vmw_surface_flags
  *
- * @drm_vmw_surface_flag_shareable:     Whether the surface is shareable
+ * @drm_vmw_surface_flag_shareable:     Deprecated - all userspace surfaces are
+ *                                      shareable.
  * @drm_vmw_surface_flag_scanout:       Whether the surface is a scanout
  *                                      surface.
  * @drm_vmw_surface_flag_create_buffer: Create a backup buffer if none is