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path: root/drivers/gpu/drm/nouveau/nouveau_ramht.c
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Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_ramht.c')
-rw-r--r--drivers/gpu/drm/nouveau/nouveau_ramht.c309
1 files changed, 0 insertions, 309 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_ramht.c b/drivers/gpu/drm/nouveau/nouveau_ramht.c
deleted file mode 100644
index 0ebb62f1fc80..000000000000
--- a/drivers/gpu/drm/nouveau/nouveau_ramht.c
+++ /dev/null
@@ -1,309 +0,0 @@
-/*
- * Copyright 2010 Red Hat Inc.
- *
- * 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, sublicense,
- * 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 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 NONINFRINGEMENT. IN NO EVENT SHALL
- * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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: Ben Skeggs
- */
-
-#include <drm/drmP.h>
-
-#include "nouveau_drv.h"
-#include "nouveau_ramht.h"
-
-static u32
-nouveau_ramht_hash_handle(struct nouveau_channel *chan, u32 handle)
-{
- struct drm_device *dev = chan->dev;
- struct drm_nouveau_private *dev_priv = dev->dev_private;
- struct nouveau_ramht *ramht = chan->ramht;
- u32 hash = 0;
- int i;
-
- NV_DEBUG(dev, "ch%d handle=0x%08x\n", chan->id, handle);
-
- for (i = 32; i > 0; i -= ramht->bits) {
- hash ^= (handle & ((1 << ramht->bits) - 1));
- handle >>= ramht->bits;
- }
-
- if (dev_priv->card_type < NV_50)
- hash ^= chan->id << (ramht->bits - 4);
- hash <<= 3;
-
- NV_DEBUG(dev, "hash=0x%08x\n", hash);
- return hash;
-}
-
-static int
-nouveau_ramht_entry_valid(struct drm_device *dev, struct nouveau_gpuobj *ramht,
- u32 offset)
-{
- struct drm_nouveau_private *dev_priv = dev->dev_private;
- u32 ctx = nv_ro32(ramht, offset + 4);
-
- if (dev_priv->card_type < NV_40)
- return ((ctx & NV_RAMHT_CONTEXT_VALID) != 0);
- return (ctx != 0);
-}
-
-static int
-nouveau_ramht_entry_same_channel(struct nouveau_channel *chan,
- struct nouveau_gpuobj *ramht, u32 offset)
-{
- struct drm_nouveau_private *dev_priv = chan->dev->dev_private;
- u32 ctx = nv_ro32(ramht, offset + 4);
-
- if (dev_priv->card_type >= NV_50)
- return true;
- else if (dev_priv->card_type >= NV_40)
- return chan->id ==
- ((ctx >> NV40_RAMHT_CONTEXT_CHANNEL_SHIFT) & 0x1f);
- else
- return chan->id ==
- ((ctx >> NV_RAMHT_CONTEXT_CHANNEL_SHIFT) & 0x1f);
-}
-
-int
-nouveau_ramht_insert(struct nouveau_channel *chan, u32 handle,
- struct nouveau_gpuobj *gpuobj)
-{
- struct drm_device *dev = chan->dev;
- struct drm_nouveau_private *dev_priv = dev->dev_private;
- struct nouveau_instmem_engine *instmem = &dev_priv->engine.instmem;
- struct nouveau_ramht_entry *entry;
- struct nouveau_gpuobj *ramht = chan->ramht->gpuobj;
- unsigned long flags;
- u32 ctx, co, ho;
-
- if (nouveau_ramht_find(chan, handle))
- return -EEXIST;
-
- entry = kmalloc(sizeof(*entry), GFP_KERNEL);
- if (!entry)
- return -ENOMEM;
- entry->channel = chan;
- entry->gpuobj = NULL;
- entry->handle = handle;
- nouveau_gpuobj_ref(gpuobj, &entry->gpuobj);
-
- if (dev_priv->card_type < NV_40) {
- ctx = NV_RAMHT_CONTEXT_VALID | (gpuobj->pinst >> 4) |
- (chan->id << NV_RAMHT_CONTEXT_CHANNEL_SHIFT) |
- (gpuobj->engine << NV_RAMHT_CONTEXT_ENGINE_SHIFT);
- } else
- if (dev_priv->card_type < NV_50) {
- ctx = (gpuobj->pinst >> 4) |
- (chan->id << NV40_RAMHT_CONTEXT_CHANNEL_SHIFT) |
- (gpuobj->engine << NV40_RAMHT_CONTEXT_ENGINE_SHIFT);
- } else {
- if (gpuobj->engine == NVOBJ_ENGINE_DISPLAY) {
- ctx = (gpuobj->cinst << 10) |
- (chan->id << 28) |
- chan->id; /* HASH_TAG */
- } else {
- ctx = (gpuobj->cinst >> 4) |
- ((gpuobj->engine <<
- NV40_RAMHT_CONTEXT_ENGINE_SHIFT));
- }
- }
-
- spin_lock_irqsave(&chan->ramht->lock, flags);
- list_add(&entry->head, &chan->ramht->entries);
-
- co = ho = nouveau_ramht_hash_handle(chan, handle);
- do {
- if (!nouveau_ramht_entry_valid(dev, ramht, co)) {
- NV_DEBUG(dev,
- "insert ch%d 0x%08x: h=0x%08x, c=0x%08x\n",
- chan->id, co, handle, ctx);
- nv_wo32(ramht, co + 0, handle);
- nv_wo32(ramht, co + 4, ctx);
-
- spin_unlock_irqrestore(&chan->ramht->lock, flags);
- instmem->flush(dev);
- return 0;
- }
- NV_DEBUG(dev, "collision ch%d 0x%08x: h=0x%08x\n",
- chan->id, co, nv_ro32(ramht, co));
-
- co += 8;
- if (co >= ramht->size)
- co = 0;
- } while (co != ho);
-
- NV_ERROR(dev, "RAMHT space exhausted. ch=%d\n", chan->id);
- list_del(&entry->head);
- spin_unlock_irqrestore(&chan->ramht->lock, flags);
- kfree(entry);
- return -ENOMEM;
-}
-
-static struct nouveau_ramht_entry *
-nouveau_ramht_remove_entry(struct nouveau_channel *chan, u32 handle)
-{
- struct nouveau_ramht *ramht = chan ? chan->ramht : NULL;
- struct nouveau_ramht_entry *entry;
- unsigned long flags;
-
- if (!ramht)
- return NULL;
-
- spin_lock_irqsave(&ramht->lock, flags);
- list_for_each_entry(entry, &ramht->entries, head) {
- if (entry->channel == chan &&
- (!handle || entry->handle == handle)) {
- list_del(&entry->head);
- spin_unlock_irqrestore(&ramht->lock, flags);
-
- return entry;
- }
- }
- spin_unlock_irqrestore(&ramht->lock, flags);
-
- return NULL;
-}
-
-static void
-nouveau_ramht_remove_hash(struct nouveau_channel *chan, u32 handle)
-{
- struct drm_device *dev = chan->dev;
- struct drm_nouveau_private *dev_priv = dev->dev_private;
- struct nouveau_instmem_engine *instmem = &dev_priv->engine.instmem;
- struct nouveau_gpuobj *ramht = chan->ramht->gpuobj;
- unsigned long flags;
- u32 co, ho;
-
- spin_lock_irqsave(&chan->ramht->lock, flags);
- co = ho = nouveau_ramht_hash_handle(chan, handle);
- do {
- if (nouveau_ramht_entry_valid(dev, ramht, co) &&
- nouveau_ramht_entry_same_channel(chan, ramht, co) &&
- (handle == nv_ro32(ramht, co))) {
- NV_DEBUG(dev,
- "remove ch%d 0x%08x: h=0x%08x, c=0x%08x\n",
- chan->id, co, handle, nv_ro32(ramht, co + 4));
- nv_wo32(ramht, co + 0, 0x00000000);
- nv_wo32(ramht, co + 4, 0x00000000);
- instmem->flush(dev);
- goto out;
- }
-
- co += 8;
- if (co >= ramht->size)
- co = 0;
- } while (co != ho);
-
- NV_ERROR(dev, "RAMHT entry not found. ch=%d, handle=0x%08x\n",
- chan->id, handle);
-out:
- spin_unlock_irqrestore(&chan->ramht->lock, flags);
-}
-
-int
-nouveau_ramht_remove(struct nouveau_channel *chan, u32 handle)
-{
- struct nouveau_ramht_entry *entry;
-
- entry = nouveau_ramht_remove_entry(chan, handle);
- if (!entry)
- return -ENOENT;
-
- nouveau_ramht_remove_hash(chan, entry->handle);
- nouveau_gpuobj_ref(NULL, &entry->gpuobj);
- kfree(entry);
- return 0;
-}
-
-struct nouveau_gpuobj *
-nouveau_ramht_find(struct nouveau_channel *chan, u32 handle)
-{
- struct nouveau_ramht *ramht = chan->ramht;
- struct nouveau_ramht_entry *entry;
- struct nouveau_gpuobj *gpuobj = NULL;
- unsigned long flags;
-
- if (unlikely(!chan->ramht))
- return NULL;
-
- spin_lock_irqsave(&ramht->lock, flags);
- list_for_each_entry(entry, &chan->ramht->entries, head) {
- if (entry->channel == chan && entry->handle == handle) {
- gpuobj = entry->gpuobj;
- break;
- }
- }
- spin_unlock_irqrestore(&ramht->lock, flags);
-
- return gpuobj;
-}
-
-int
-nouveau_ramht_new(struct drm_device *dev, struct nouveau_gpuobj *gpuobj,
- struct nouveau_ramht **pramht)
-{
- struct nouveau_ramht *ramht;
-
- ramht = kzalloc(sizeof(*ramht), GFP_KERNEL);
- if (!ramht)
- return -ENOMEM;
-
- ramht->dev = dev;
- kref_init(&ramht->refcount);
- ramht->bits = drm_order(gpuobj->size / 8);
- INIT_LIST_HEAD(&ramht->entries);
- spin_lock_init(&ramht->lock);
- nouveau_gpuobj_ref(gpuobj, &ramht->gpuobj);
-
- *pramht = ramht;
- return 0;
-}
-
-static void
-nouveau_ramht_del(struct kref *ref)
-{
- struct nouveau_ramht *ramht =
- container_of(ref, struct nouveau_ramht, refcount);
-
- nouveau_gpuobj_ref(NULL, &ramht->gpuobj);
- kfree(ramht);
-}
-
-void
-nouveau_ramht_ref(struct nouveau_ramht *ref, struct nouveau_ramht **ptr,
- struct nouveau_channel *chan)
-{
- struct nouveau_ramht_entry *entry;
- struct nouveau_ramht *ramht;
-
- if (ref)
- kref_get(&ref->refcount);
-
- ramht = *ptr;
- if (ramht) {
- while ((entry = nouveau_ramht_remove_entry(chan, 0))) {
- nouveau_ramht_remove_hash(chan, entry->handle);
- nouveau_gpuobj_ref(NULL, &entry->gpuobj);
- kfree(entry);
- }
-
- kref_put(&ramht->refcount, nouveau_ramht_del);
- }
- *ptr = ref;
-}
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