linux/drivers/gpu/drm/nouveau/nvc0_instmem.c

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/*
* 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 "drmP.h"
#include "nouveau_drv.h"
struct nvc0_gpuobj_node {
struct nouveau_bo *vram;
struct drm_mm_node *ramin;
u32 align;
};
int
nvc0_instmem_get(struct nouveau_gpuobj *gpuobj, u32 size, u32 align)
{
struct drm_device *dev = gpuobj->dev;
struct nvc0_gpuobj_node *node = NULL;
int ret;
node = kzalloc(sizeof(*node), GFP_KERNEL);
if (!node)
return -ENOMEM;
node->align = align;
ret = nouveau_bo_new(dev, NULL, size, align, TTM_PL_FLAG_VRAM,
0, 0x0000, true, false, &node->vram);
if (ret) {
NV_ERROR(dev, "error getting PRAMIN backing pages: %d\n", ret);
return ret;
}
ret = nouveau_bo_pin(node->vram, TTM_PL_FLAG_VRAM);
if (ret) {
NV_ERROR(dev, "error pinning PRAMIN backing VRAM: %d\n", ret);
nouveau_bo_ref(NULL, &node->vram);
return ret;
}
gpuobj->vinst = node->vram->bo.mem.start << PAGE_SHIFT;
gpuobj->size = node->vram->bo.mem.num_pages << PAGE_SHIFT;
gpuobj->node = node;
return 0;
}
void
nvc0_instmem_put(struct nouveau_gpuobj *gpuobj)
{
struct nvc0_gpuobj_node *node;
node = gpuobj->node;
gpuobj->node = NULL;
nouveau_bo_unpin(node->vram);
nouveau_bo_ref(NULL, &node->vram);
kfree(node);
}
int
nvc0_instmem_map(struct nouveau_gpuobj *gpuobj)
{
struct drm_nouveau_private *dev_priv = gpuobj->dev->dev_private;
struct nvc0_gpuobj_node *node = gpuobj->node;
struct drm_device *dev = gpuobj->dev;
struct drm_mm_node *ramin = NULL;
u32 pte, pte_end;
u64 vram;
do {
if (drm_mm_pre_get(&dev_priv->ramin_heap))
return -ENOMEM;
spin_lock(&dev_priv->ramin_lock);
ramin = drm_mm_search_free(&dev_priv->ramin_heap, gpuobj->size,
node->align, 0);
if (ramin == NULL) {
spin_unlock(&dev_priv->ramin_lock);
return -ENOMEM;
}
ramin = drm_mm_get_block_atomic(ramin, gpuobj->size, node->align);
spin_unlock(&dev_priv->ramin_lock);
} while (ramin == NULL);
pte = (ramin->start >> 12) << 1;
pte_end = ((ramin->size >> 12) << 1) + pte;
vram = gpuobj->vinst;
NV_DEBUG(dev, "pramin=0x%lx, pte=%d, pte_end=%d\n",
ramin->start, pte, pte_end);
NV_DEBUG(dev, "first vram page: 0x%010llx\n", gpuobj->vinst);
while (pte < pte_end) {
nv_wr32(dev, 0x702000 + (pte * 8), (vram >> 8) | 1);
nv_wr32(dev, 0x702004 + (pte * 8), 0);
vram += 4096;
pte++;
}
dev_priv->engine.instmem.flush(dev);
if (1) {
u32 chan = nv_rd32(dev, 0x1700) << 16;
nv_wr32(dev, 0x100cb8, (chan + 0x1000) >> 8);
nv_wr32(dev, 0x100cbc, 0x80000005);
}
node->ramin = ramin;
gpuobj->pinst = ramin->start;
return 0;
}
void
nvc0_instmem_unmap(struct nouveau_gpuobj *gpuobj)
{
struct drm_nouveau_private *dev_priv = gpuobj->dev->dev_private;
struct nvc0_gpuobj_node *node = gpuobj->node;
u32 pte, pte_end;
if (!node->ramin || !dev_priv->ramin_available)
return;
pte = (node->ramin->start >> 12) << 1;
pte_end = ((node->ramin->size >> 12) << 1) + pte;
while (pte < pte_end) {
nv_wr32(gpuobj->dev, 0x702000 + (pte * 8), 0);
nv_wr32(gpuobj->dev, 0x702004 + (pte * 8), 0);
pte++;
}
dev_priv->engine.instmem.flush(gpuobj->dev);
spin_lock(&dev_priv->ramin_lock);
drm_mm_put_block(node->ramin);
node->ramin = NULL;
spin_unlock(&dev_priv->ramin_lock);
}
void
nvc0_instmem_flush(struct drm_device *dev)
{
nv_wr32(dev, 0x070000, 1);
if (!nv_wait(dev, 0x070000, 0x00000002, 0x00000000))
NV_ERROR(dev, "PRAMIN flush timeout\n");
}
int
nvc0_instmem_suspend(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
u32 *buf;
int i;
dev_priv->susres.ramin_copy = vmalloc(65536);
if (!dev_priv->susres.ramin_copy)
return -ENOMEM;
buf = dev_priv->susres.ramin_copy;
for (i = 0; i < 65536; i += 4)
buf[i/4] = nv_rd32(dev, NV04_PRAMIN + i);
return 0;
}
void
nvc0_instmem_resume(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
u32 *buf = dev_priv->susres.ramin_copy;
u64 chan;
int i;
chan = dev_priv->vram_size - dev_priv->ramin_rsvd_vram;
nv_wr32(dev, 0x001700, chan >> 16);
for (i = 0; i < 65536; i += 4)
nv_wr32(dev, NV04_PRAMIN + i, buf[i/4]);
vfree(dev_priv->susres.ramin_copy);
dev_priv->susres.ramin_copy = NULL;
nv_wr32(dev, 0x001714, 0xc0000000 | (chan >> 12));
}
int
nvc0_instmem_init(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
u64 chan, pgt3, imem, lim3 = dev_priv->ramin_size - 1;
int ret, i;
dev_priv->ramin_rsvd_vram = 1 * 1024 * 1024;
chan = dev_priv->vram_size - dev_priv->ramin_rsvd_vram;
imem = 4096 + 4096 + 32768;
nv_wr32(dev, 0x001700, chan >> 16);
/* channel setup */
nv_wr32(dev, 0x700200, lower_32_bits(chan + 0x1000));
nv_wr32(dev, 0x700204, upper_32_bits(chan + 0x1000));
nv_wr32(dev, 0x700208, lower_32_bits(lim3));
nv_wr32(dev, 0x70020c, upper_32_bits(lim3));
/* point pgd -> pgt */
nv_wr32(dev, 0x701000, 0);
nv_wr32(dev, 0x701004, ((chan + 0x2000) >> 8) | 1);
/* point pgt -> physical vram for channel */
pgt3 = 0x2000;
for (i = 0; i < dev_priv->ramin_rsvd_vram; i += 4096, pgt3 += 8) {
nv_wr32(dev, 0x700000 + pgt3, ((chan + i) >> 8) | 1);
nv_wr32(dev, 0x700004 + pgt3, 0);
}
/* clear rest of pgt */
for (; i < dev_priv->ramin_size; i += 4096, pgt3 += 8) {
nv_wr32(dev, 0x700000 + pgt3, 0);
nv_wr32(dev, 0x700004 + pgt3, 0);
}
/* point bar3 at the channel */
nv_wr32(dev, 0x001714, 0xc0000000 | (chan >> 12));
/* Global PRAMIN heap */
ret = drm_mm_init(&dev_priv->ramin_heap, imem,
dev_priv->ramin_size - imem);
if (ret) {
NV_ERROR(dev, "Failed to init RAMIN heap\n");
return -ENOMEM;
}
return 0;
}
void
nvc0_instmem_takedown(struct drm_device *dev)
{
}