drm/via: use drm_mm instead of drm_sman

To make the transition in a piece-wise and bisectable way possible,
I've hijacked the ->owner_list from drm_sman. While transitioning, the
list_add was done by the driver, while the list_del was still done by
the dying sman code.

Now that we are in full control of ->owner_list, do the list_del
ourselves.

v2: Better explain the list_del trickery as suggested by Chris Wilson.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

3 files changed, 43 insertions, 41 deletions

diff --git a/drivers/gpu/drm/via/via_drv.h b/drivers/gpu/drm/via/via_drv.h
index 108ea71f399..88edacc9300 100644
--- a/drivers/gpu/drm/via/via_drv.h
+++ b/drivers/gpu/drm/via/via_drv.h
@@ -24,7 +24,7 @@
 #ifndef _VIA_DRV_H_
 #define _VIA_DRV_H_
 
-#include "drm_sman.h"
+#include "drm_mm.h"
 #define DRIVER_AUTHOR   "Various"
 
 #define DRIVER_NAME             "via"
@@ -88,9 +88,10 @@ typedef struct drm_via_private {
         uint32_t irq_pending_mask;
         int *irq_map;
         unsigned int idle_fault;
-        struct drm_sman sman;
         int vram_initialized;
+        struct drm_mm vram_mm;
         int agp_initialized;
+        struct drm_mm agp_mm;
         /** Mapping of userspace keys to mm objects */
         struct idr object_idr;
         unsigned long vram_offset;
diff --git a/drivers/gpu/drm/via/via_map.c b/drivers/gpu/drm/via/via_map.c
index fa5afbcf7e2..a2ab3436515 100644
--- a/drivers/gpu/drm/via/via_map.c
+++ b/drivers/gpu/drm/via/via_map.c
@@ -105,15 +105,9 @@ int via_driver_load(struct drm_device *dev, unsigned long chipset)
         dev_priv->chipset = chipset;
 
         idr_init(&dev->object_name_idr);
-        ret = drm_sman_init(&dev_priv->sman, 2, 12, 8);
-        if (ret) {
-                kfree(dev_priv);
-                return ret;
-        }
 
         ret = drm_vblank_init(dev, 1);
         if (ret) {
-                drm_sman_takedown(&dev_priv->sman);
                 kfree(dev_priv);
                 return ret;
         }
@@ -125,7 +119,6 @@ int via_driver_unload(struct drm_device *dev)
 {
         drm_via_private_t *dev_priv = dev->dev_private;
 
-        drm_sman_takedown(&dev_priv->sman);
         idr_remove_all(&dev_priv->object_idr);
         idr_destroy(&dev_priv->object_idr);
 
diff --git a/drivers/gpu/drm/via/via_mm.c b/drivers/gpu/drm/via/via_mm.c
index e6f2b6371b4..bedb23d2ece 100644
--- a/drivers/gpu/drm/via/via_mm.c
+++ b/drivers/gpu/drm/via/via_mm.c
@@ -28,26 +28,22 @@
 #include "drmP.h"
 #include "via_drm.h"
 #include "via_drv.h"
-#include "drm_sman.h"
 
 #define VIA_MM_ALIGN_SHIFT 4
 #define VIA_MM_ALIGN_MASK ((1 << VIA_MM_ALIGN_SHIFT) - 1)
 
+struct via_memblock {
+        struct drm_mm_node mm_node;
+        struct list_head owner_list;
+};
+
 int via_agp_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
 {
         drm_via_agp_t *agp = data;
         drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
-        int ret;
 
         mutex_lock(&dev->struct_mutex);
-        ret = drm_sman_set_range(&dev_priv->sman, VIA_MEM_AGP, 0,
-                                 agp->size >> VIA_MM_ALIGN_SHIFT);
-
-        if (ret) {
-                DRM_ERROR("AGP memory manager initialisation error\n");
-                mutex_unlock(&dev->struct_mutex);
-                return ret;
-        }
+        drm_mm_init(&dev_priv->agp_mm, 0, agp->size >> VIA_MM_ALIGN_SHIFT);
 
         dev_priv->agp_initialized = 1;
         dev_priv->agp_offset = agp->offset;
@@ -61,17 +57,9 @@ int via_fb_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
 {
         drm_via_fb_t *fb = data;
         drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
-        int ret;
 
         mutex_lock(&dev->struct_mutex);
-        ret = drm_sman_set_range(&dev_priv->sman, VIA_MEM_VIDEO, 0,
-                                 fb->size >> VIA_MM_ALIGN_SHIFT);
-
-        if (ret) {
-                DRM_ERROR("VRAM memory manager initialisation error\n");
-                mutex_unlock(&dev->struct_mutex);
-                return ret;
-        }
+        drm_mm_init(&dev_priv->vram_mm, 0, fb->size >> VIA_MM_ALIGN_SHIFT);
 
         dev_priv->vram_initialized = 1;
         dev_priv->vram_offset = fb->offset;
@@ -108,9 +96,14 @@ void via_lastclose(struct drm_device *dev)
                 return;
 
         mutex_lock(&dev->struct_mutex);
-        drm_sman_cleanup(&dev_priv->sman);
-        dev_priv->vram_initialized = 0;
-        dev_priv->agp_initialized = 0;
+        if (dev_priv->vram_initialized) {
+                drm_mm_takedown(&dev_priv->vram_mm);
+                dev_priv->vram_initialized = 0;
+        }
+        if (dev_priv->agp_initialized) {
+                drm_mm_takedown(&dev_priv->agp_mm);
+                dev_priv->agp_initialized = 0;
+        }
         mutex_unlock(&dev->struct_mutex);
 }
 
@@ -119,7 +112,7 @@ int via_mem_alloc(struct drm_device *dev, void *data,
 {
         drm_via_mem_t *mem = data;
         int retval = 0, user_key;
-        struct drm_memblock_item *item;
+        struct via_memblock *item;
         drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
         struct via_file_private *file_priv = file->driver_priv;
         unsigned long tmpSize;
@@ -137,13 +130,24 @@ int via_mem_alloc(struct drm_device *dev, void *data,
                 return -EINVAL;
         }
 
-        tmpSize = (mem->size + VIA_MM_ALIGN_MASK) >> VIA_MM_ALIGN_SHIFT;
-        item = drm_sman_alloc(&dev_priv->sman, mem->type, tmpSize, 0, 0);
+        item = kzalloc(sizeof(*item), GFP_KERNEL);
         if (!item) {
                 retval = -ENOMEM;
                 goto fail_alloc;
         }
 
+        tmpSize = (mem->size + VIA_MM_ALIGN_MASK) >> VIA_MM_ALIGN_SHIFT;
+        if (mem->type == VIA_MEM_AGP)
+                retval = drm_mm_insert_node(&dev_priv->agp_mm,
+                                            &item->mm_node,
+                                            tmpSize, 0);
+        else
+                retval = drm_mm_insert_node(&dev_priv->vram_mm,
+                                            &item->mm_node,
+                                            tmpSize, 0);
+        if (retval)
+                goto fail_alloc;
+
 again:
         if (idr_pre_get(&dev_priv->object_idr, GFP_KERNEL) == 0) {
                 retval = -ENOMEM;
@@ -161,15 +165,15 @@ again:
 
         mem->offset = ((mem->type == VIA_MEM_VIDEO) ?
                       dev_priv->vram_offset : dev_priv->agp_offset) +
-            (item->mm->
-             offset(item->mm, item->mm_info) << VIA_MM_ALIGN_SHIFT);
+            ((item->mm_node.start) << VIA_MM_ALIGN_SHIFT);
         mem->index = user_key;
 
         return 0;
 
 fail_idr:
-        drm_sman_free(item);
+        drm_mm_remove_node(&item->mm_node);
 fail_alloc:
+        kfree(item);
         mutex_unlock(&dev->struct_mutex);
 
         mem->offset = 0;
@@ -184,7 +188,7 @@ int via_mem_free(struct drm_device *dev, void *data, struct drm_file *file_priv)
 {
         drm_via_private_t *dev_priv = dev->dev_private;
         drm_via_mem_t *mem = data;
-        struct drm_memblock_item *obj;
+        struct via_memblock *obj;
         int ret;
 
         mutex_lock(&dev->struct_mutex);
@@ -195,7 +199,9 @@ int via_mem_free(struct drm_device *dev, void *data, struct drm_file *file_priv)
         }
 
         idr_remove(&dev_priv->object_idr, mem->index);
-        drm_sman_free(obj);
+        list_del(&obj->owner_list);
+        drm_mm_remove_node(&obj->mm_node);
+        kfree(obj);
         mutex_unlock(&dev->struct_mutex);
 
         DRM_DEBUG("free = 0x%lx\n", mem->index);
@@ -208,7 +214,7 @@ void via_reclaim_buffers_locked(struct drm_device *dev,
                                 struct drm_file *file)
 {
         struct via_file_private *file_priv = file->driver_priv;
-        struct drm_memblock_item *entry, *next;
+        struct via_memblock *entry, *next;
 
         mutex_lock(&dev->struct_mutex);
         if (list_empty(&file_priv->obj_list)) {
@@ -221,7 +227,9 @@ void via_reclaim_buffers_locked(struct drm_device *dev,
 
         list_for_each_entry_safe(entry, next, &file_priv->obj_list,
                                  owner_list) {
-                drm_sman_free(entry);
+                list_del(&entry->owner_list);
+                drm_mm_remove_node(&entry->mm_node);
+                kfree(entry);
         }
         mutex_unlock(&dev->struct_mutex);
         return;