1 files changed, 333 insertions, 0 deletions
diff --git a/drivers/gpu/drm/sis/sis_mm.c b/drivers/gpu/drm/sis/sis_mm.c
new file mode 100644
index 00000000000..b3878770fce
--- /dev/null
+++ b/drivers/gpu/drm/sis/sis_mm.c
@@ -0,0 +1,333 @@
+/**************************************************************************
+ *
+ * Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND., USA.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ *
+ **************************************************************************/
+
+/*
+ * Authors:
+ *    Thomas Hellström <thomas-at-tungstengraphics-dot-com>
+ */
+
+#include "drmP.h"
+#include "sis_drm.h"
+#include "sis_drv.h"
+
+#include <video/sisfb.h>
+
+#define VIDEO_TYPE 0
+#define AGP_TYPE 1
+
+
+#if defined(CONFIG_FB_SIS)
+/* fb management via fb device */
+
+#define SIS_MM_ALIGN_SHIFT 0
+#define SIS_MM_ALIGN_MASK 0
+
+static void *sis_sman_mm_allocate(void *private, unsigned long size,
+				  unsigned alignment)
+{
+	struct sis_memreq req;
+
+	req.size = size;
+	sis_malloc(&req);
+	if (req.size == 0)
+		return NULL;
+	else
+		return (void *)~req.offset;
+}
+
+static void sis_sman_mm_free(void *private, void *ref)
+{
+	sis_free(~((unsigned long)ref));
+}
+
+static void sis_sman_mm_destroy(void *private)
+{
+	;
+}
+
+static unsigned long sis_sman_mm_offset(void *private, void *ref)
+{
+	return ~((unsigned long)ref);
+}
+
+#else /* CONFIG_FB_SIS */
+
+#define SIS_MM_ALIGN_SHIFT 4
+#define SIS_MM_ALIGN_MASK ( (1 << SIS_MM_ALIGN_SHIFT) - 1)
+
+#endif /* CONFIG_FB_SIS */
+
+static int sis_fb_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
+{
+	drm_sis_private_t *dev_priv = dev->dev_private;
+	drm_sis_fb_t *fb = data;
+	int ret;
+
+	mutex_lock(&dev->struct_mutex);
+#if defined(CONFIG_FB_SIS)
+	{
+		struct drm_sman_mm sman_mm;
+		sman_mm.private = (void *)0xFFFFFFFF;
+		sman_mm.allocate = sis_sman_mm_allocate;
+		sman_mm.free = sis_sman_mm_free;
+		sman_mm.destroy = sis_sman_mm_destroy;
+		sman_mm.offset = sis_sman_mm_offset;
+		ret =
+		    drm_sman_set_manager(&dev_priv->sman, VIDEO_TYPE, &sman_mm);
+	}
+#else
+	ret = drm_sman_set_range(&dev_priv->sman, VIDEO_TYPE, 0,
+				 fb->size >> SIS_MM_ALIGN_SHIFT);
+#endif
+
+	if (ret) {
+		DRM_ERROR("VRAM memory manager initialisation error\n");
+		mutex_unlock(&dev->struct_mutex);
+		return ret;
+	}
+
+	dev_priv->vram_initialized = 1;
+	dev_priv->vram_offset = fb->offset;
+
+	mutex_unlock(&dev->struct_mutex);
+	DRM_DEBUG("offset = %u, size = %u\n", fb->offset, fb->size);
+
+	return 0;
+}
+
+static int sis_drm_alloc(struct drm_device *dev, struct drm_file *file_priv,
+			 void *data, int pool)
+{
+	drm_sis_private_t *dev_priv = dev->dev_private;
+	drm_sis_mem_t *mem = data;
+	int retval = 0;
+	struct drm_memblock_item *item;
+
+	mutex_lock(&dev->struct_mutex);
+
+	if (0 == ((pool == 0) ? dev_priv->vram_initialized :
+		      dev_priv->agp_initialized)) {
+		DRM_ERROR
+		    ("Attempt to allocate from uninitialized memory manager.\n");
+		mutex_unlock(&dev->struct_mutex);
+		return -EINVAL;
+	}
+
+	mem->size = (mem->size + SIS_MM_ALIGN_MASK) >> SIS_MM_ALIGN_SHIFT;
+	item = drm_sman_alloc(&dev_priv->sman, pool, mem->size, 0,
+			      (unsigned long)file_priv);
+
+	mutex_unlock(&dev->struct_mutex);
+	if (item) {
+		mem->offset = ((pool == 0) ?
+			      dev_priv->vram_offset : dev_priv->agp_offset) +
+		    (item->mm->
+		     offset(item->mm, item->mm_info) << SIS_MM_ALIGN_SHIFT);
+		mem->free = item->user_hash.key;
+		mem->size = mem->size << SIS_MM_ALIGN_SHIFT;
+	} else {
+		mem->offset = 0;
+		mem->size = 0;
+		mem->free = 0;
+		retval = -ENOMEM;
+	}
+
+	DRM_DEBUG("alloc %d, size = %d, offset = %d\n", pool, mem->size,
+		  mem->offset);
+
+	return retval;
+}
+
+static int sis_drm_free(struct drm_device *dev, void *data, struct drm_file *file_priv)
+{
+	drm_sis_private_t *dev_priv = dev->dev_private;
+	drm_sis_mem_t *mem = data;
+	int ret;
+
+	mutex_lock(&dev->struct_mutex);
+	ret = drm_sman_free_key(&dev_priv->sman, mem->free);
+	mutex_unlock(&dev->struct_mutex);
+	DRM_DEBUG("free = 0x%lx\n", mem->free);
+
+	return ret;
+}
+
+static int sis_fb_alloc(struct drm_device *dev, void *data,
+			struct drm_file *file_priv)
+{
+	return sis_drm_alloc(dev, file_priv, data, VIDEO_TYPE);
+}
+
+static int sis_ioctl_agp_init(struct drm_device *dev, void *data,
+			      struct drm_file *file_priv)
+{
+	drm_sis_private_t *dev_priv = dev->dev_private;
+	drm_sis_agp_t *agp = data;
+	int ret;
+	dev_priv = dev->dev_private;
+
+	mutex_lock(&dev->struct_mutex);
+	ret = drm_sman_set_range(&dev_priv->sman, AGP_TYPE, 0,
+				 agp->size >> SIS_MM_ALIGN_SHIFT);
+
+	if (ret) {
+		DRM_ERROR("AGP memory manager initialisation error\n");
+		mutex_unlock(&dev->struct_mutex);
+		return ret;
+	}
+
+	dev_priv->agp_initialized = 1;
+	dev_priv->agp_offset = agp->offset;
+	mutex_unlock(&dev->struct_mutex);
+
+	DRM_DEBUG("offset = %u, size = %u\n", agp->offset, agp->size);
+	return 0;
+}
+
+static int sis_ioctl_agp_alloc(struct drm_device *dev, void *data,
+			       struct drm_file *file_priv)
+{
+
+	return sis_drm_alloc(dev, file_priv, data, AGP_TYPE);
+}
+
+static drm_local_map_t *sis_reg_init(struct drm_device *dev)
+{
+	struct drm_map_list *entry;
+	drm_local_map_t *map;
+
+	list_for_each_entry(entry, &dev->maplist, head) {
+		map = entry->map;
+		if (!map)
+			continue;
+		if (map->type == _DRM_REGISTERS) {
+			return map;
+		}
+	}
+	return NULL;
+}
+
+int sis_idle(struct drm_device *dev)
+{
+	drm_sis_private_t *dev_priv = dev->dev_private;
+	uint32_t idle_reg;
+	unsigned long end;
+	int i;
+
+	if (dev_priv->idle_fault)
+		return 0;
+
+	if (dev_priv->mmio == NULL) {
+		dev_priv->mmio = sis_reg_init(dev);
+		if (dev_priv->mmio == NULL) {
+			DRM_ERROR("Could not find register map.\n");
+			return 0;
+		}
+	}
+
+	/*
+	 * Implement a device switch here if needed
+	 */
+
+	if (dev_priv->chipset != SIS_CHIP_315)
+		return 0;
+
+	/*
+	 * Timeout after 3 seconds. We cannot use DRM_WAIT_ON here
+	 * because its polling frequency is too low.
+	 */
+
+	end = jiffies + (DRM_HZ * 3);
+
+	for (i=0; i<4; ++i) {
+		do {
+			idle_reg = SIS_READ(0x85cc);
+		} while ( !time_after_eq(jiffies, end) &&
+			  ((idle_reg & 0x80000000) != 0x80000000));
+	}
+
+	if (time_after_eq(jiffies, end)) {
+		DRM_ERROR("Graphics engine idle timeout. "
+			  "Disabling idle check\n");
+		dev_priv->idle_fault = 1;
+	}
+
+	/*
+	 * The caller never sees an error code. It gets trapped
+	 * in libdrm.
+	 */
+
+	return 0;
+}
+
+
+void sis_lastclose(struct drm_device *dev)
+{
+	drm_sis_private_t *dev_priv = dev->dev_private;
+
+	if (!dev_priv)
+		return;
+
+	mutex_lock(&dev->struct_mutex);
+	drm_sman_cleanup(&dev_priv->sman);
+	dev_priv->vram_initialized = 0;
+	dev_priv->agp_initialized = 0;
+	dev_priv->mmio = NULL;
+	mutex_unlock(&dev->struct_mutex);
+}
+
+void sis_reclaim_buffers_locked(struct drm_device * dev,
+				struct drm_file *file_priv)
+{
+	drm_sis_private_t *dev_priv = dev->dev_private;
+
+	mutex_lock(&dev->struct_mutex);
+	if (drm_sman_owner_clean(&dev_priv->sman, (unsigned long)file_priv)) {
+		mutex_unlock(&dev->struct_mutex);
+		return;
+	}
+
+	if (dev->driver->dma_quiescent) {
+		dev->driver->dma_quiescent(dev);
+	}
+
+	drm_sman_owner_cleanup(&dev_priv->sman, (unsigned long)file_priv);
+	mutex_unlock(&dev->struct_mutex);
+	return;
+}
+
+struct drm_ioctl_desc sis_ioctls[] = {
+	DRM_IOCTL_DEF(DRM_SIS_FB_ALLOC, sis_fb_alloc, DRM_AUTH),
+	DRM_IOCTL_DEF(DRM_SIS_FB_FREE, sis_drm_free, DRM_AUTH),
+	DRM_IOCTL_DEF(DRM_SIS_AGP_INIT, sis_ioctl_agp_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
+	DRM_IOCTL_DEF(DRM_SIS_AGP_ALLOC, sis_ioctl_agp_alloc, DRM_AUTH),
+	DRM_IOCTL_DEF(DRM_SIS_AGP_FREE, sis_drm_free, DRM_AUTH),
+	DRM_IOCTL_DEF(DRM_SIS_FB_INIT, sis_fb_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
+};
+
+int sis_max_ioctl = DRM_ARRAY_SIZE(sis_ioctls);