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linux/drivers/gpu/drm/nouveau/nv50_fifo.c
Ben Skeggs 9a391ad8a2 drm/nv50: switch to indirect push buffer controls 
PFIFO on G80 and up has a new mode where the main ring buffer is simply a
ring of pointers to indirect buffers containing the actual command/data
packets.  In order to be able to implement index buffers in the 3D driver
we need to be able to submit data-only push buffers right after the cmd
packet header, which is only possible using the new command submission
method.

This commit doesn't make it possible to implement index buffers yet, some
userspace interface changes will be required, but it does allow for
testing/debugging of the hardware-side support in the meantime.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2010-02-25 15:08:29 +10:00

501 lines
15 KiB
C
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/*
* Copyright (C) 2007 Ben Skeggs.
* 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, 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 (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 NONINFRINGEMENT.
* IN NO EVENT SHALL THE COPYRIGHT OWNER(S) 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.
*
*/
#include "drmP.h"
#include "drm.h"
#include "nouveau_drv.h"
struct nv50_fifo_priv {
struct nouveau_gpuobj_ref *thingo[2];
int cur_thingo;
};
#define IS_G80 ((dev_priv->chipset & 0xf0) == 0x50)
static void
nv50_fifo_init_thingo(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nv50_fifo_priv *priv = dev_priv->engine.fifo.priv;
struct nouveau_gpuobj_ref *cur;
int i, nr;
NV_DEBUG(dev, "\n");
cur = priv->thingo[priv->cur_thingo];
priv->cur_thingo = !priv->cur_thingo;
/* We never schedule channel 0 or 127 */
dev_priv->engine.instmem.prepare_access(dev, true);
for (i = 1, nr = 0; i < 127; i++) {
if (dev_priv->fifos[i] && dev_priv->fifos[i]->ramfc)
nv_wo32(dev, cur->gpuobj, nr++, i);
}
dev_priv->engine.instmem.finish_access(dev);
nv_wr32(dev, 0x32f4, cur->instance >> 12);
nv_wr32(dev, 0x32ec, nr);
nv_wr32(dev, 0x2500, 0x101);
}
static int
nv50_fifo_channel_enable(struct drm_device *dev, int channel, bool nt)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_channel *chan = dev_priv->fifos[channel];
uint32_t inst;
NV_DEBUG(dev, "ch%d\n", channel);
if (!chan->ramfc)
return -EINVAL;
if (IS_G80)
inst = chan->ramfc->instance >> 12;
else
inst = chan->ramfc->instance >> 8;
nv_wr32(dev, NV50_PFIFO_CTX_TABLE(channel),
inst | NV50_PFIFO_CTX_TABLE_CHANNEL_ENABLED);
if (!nt)
nv50_fifo_init_thingo(dev);
return 0;
}
static void
nv50_fifo_channel_disable(struct drm_device *dev, int channel, bool nt)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
uint32_t inst;
NV_DEBUG(dev, "ch%d, nt=%d\n", channel, nt);
if (IS_G80)
inst = NV50_PFIFO_CTX_TABLE_INSTANCE_MASK_G80;
else
inst = NV50_PFIFO_CTX_TABLE_INSTANCE_MASK_G84;
nv_wr32(dev, NV50_PFIFO_CTX_TABLE(channel), inst);
if (!nt)
nv50_fifo_init_thingo(dev);
}
static void
nv50_fifo_init_reset(struct drm_device *dev)
{
uint32_t pmc_e = NV_PMC_ENABLE_PFIFO;
NV_DEBUG(dev, "\n");
nv_wr32(dev, NV03_PMC_ENABLE, nv_rd32(dev, NV03_PMC_ENABLE) & ~pmc_e);
nv_wr32(dev, NV03_PMC_ENABLE, nv_rd32(dev, NV03_PMC_ENABLE) | pmc_e);
}
static void
nv50_fifo_init_intr(struct drm_device *dev)
{
NV_DEBUG(dev, "\n");
nv_wr32(dev, NV03_PFIFO_INTR_0, 0xFFFFFFFF);
nv_wr32(dev, NV03_PFIFO_INTR_EN_0, 0xFFFFFFFF);
}
static void
nv50_fifo_init_context_table(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
int i;
NV_DEBUG(dev, "\n");
for (i = 0; i < NV50_PFIFO_CTX_TABLE__SIZE; i++) {
if (dev_priv->fifos[i])
nv50_fifo_channel_enable(dev, i, true);
else
nv50_fifo_channel_disable(dev, i, true);
}
nv50_fifo_init_thingo(dev);
}
static void
nv50_fifo_init_regs__nv(struct drm_device *dev)
{
NV_DEBUG(dev, "\n");
nv_wr32(dev, 0x250c, 0x6f3cfc34);
}
static void
nv50_fifo_init_regs(struct drm_device *dev)
{
NV_DEBUG(dev, "\n");
nv_wr32(dev, 0x2500, 0);
nv_wr32(dev, 0x3250, 0);
nv_wr32(dev, 0x3220, 0);
nv_wr32(dev, 0x3204, 0);
nv_wr32(dev, 0x3210, 0);
nv_wr32(dev, 0x3270, 0);
/* Enable dummy channels setup by nv50_instmem.c */
nv50_fifo_channel_enable(dev, 0, true);
nv50_fifo_channel_enable(dev, 127, true);
}
int
nv50_fifo_init(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nv50_fifo_priv *priv;
int ret;
NV_DEBUG(dev, "\n");
priv = dev_priv->engine.fifo.priv;
if (priv) {
priv->cur_thingo = !priv->cur_thingo;
goto just_reset;
}
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
dev_priv->engine.fifo.priv = priv;
ret = nouveau_gpuobj_new_ref(dev, NULL, NULL, 0, 128*4, 0x1000,
NVOBJ_FLAG_ZERO_ALLOC, &priv->thingo[0]);
if (ret) {
NV_ERROR(dev, "error creating thingo0: %d\n", ret);
return ret;
}
ret = nouveau_gpuobj_new_ref(dev, NULL, NULL, 0, 128*4, 0x1000,
NVOBJ_FLAG_ZERO_ALLOC, &priv->thingo[1]);
if (ret) {
NV_ERROR(dev, "error creating thingo1: %d\n", ret);
return ret;
}
just_reset:
nv50_fifo_init_reset(dev);
nv50_fifo_init_intr(dev);
nv50_fifo_init_context_table(dev);
nv50_fifo_init_regs__nv(dev);
nv50_fifo_init_regs(dev);
dev_priv->engine.fifo.enable(dev);
dev_priv->engine.fifo.reassign(dev, true);
return 0;
}
void
nv50_fifo_takedown(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nv50_fifo_priv *priv = dev_priv->engine.fifo.priv;
NV_DEBUG(dev, "\n");
if (!priv)
return;
nouveau_gpuobj_ref_del(dev, &priv->thingo[0]);
nouveau_gpuobj_ref_del(dev, &priv->thingo[1]);
dev_priv->engine.fifo.priv = NULL;
kfree(priv);
}
int
nv50_fifo_channel_id(struct drm_device *dev)
{
return nv_rd32(dev, NV03_PFIFO_CACHE1_PUSH1) &
NV50_PFIFO_CACHE1_PUSH1_CHID_MASK;
}
int
nv50_fifo_create_context(struct nouveau_channel *chan)
{
struct drm_device *dev = chan->dev;
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_gpuobj *ramfc = NULL;
unsigned long flags;
int ret;
NV_DEBUG(dev, "ch%d\n", chan->id);
if (IS_G80) {
uint32_t ramin_poffset = chan->ramin->gpuobj->im_pramin->start;
uint32_t ramin_voffset = chan->ramin->gpuobj->im_backing_start;
ret = nouveau_gpuobj_new_fake(dev, ramin_poffset, ramin_voffset,
0x100, NVOBJ_FLAG_ZERO_ALLOC |
NVOBJ_FLAG_ZERO_FREE, &ramfc,
&chan->ramfc);
if (ret)
return ret;
ret = nouveau_gpuobj_new_fake(dev, ramin_poffset + 0x0400,
ramin_voffset + 0x0400, 4096,
0, NULL, &chan->cache);
if (ret)
return ret;
} else {
ret = nouveau_gpuobj_new_ref(dev, chan, NULL, 0, 0x100, 256,
NVOBJ_FLAG_ZERO_ALLOC |
NVOBJ_FLAG_ZERO_FREE,
&chan->ramfc);
if (ret)
return ret;
ramfc = chan->ramfc->gpuobj;
ret = nouveau_gpuobj_new_ref(dev, chan, NULL, 0, 4096, 1024,
0, &chan->cache);
if (ret)
return ret;
}
spin_lock_irqsave(&dev_priv->context_switch_lock, flags);
dev_priv->engine.instmem.prepare_access(dev, true);
nv_wo32(dev, ramfc, 0x48/4, chan->pushbuf->instance >> 4);
nv_wo32(dev, ramfc, 0x80/4, (0xc << 24) | (chan->ramht->instance >> 4));
nv_wo32(dev, ramfc, 0x44/4, 0x2101ffff);
nv_wo32(dev, ramfc, 0x60/4, 0x7fffffff);
nv_wo32(dev, ramfc, 0x40/4, 0x00000000);
nv_wo32(dev, ramfc, 0x7c/4, 0x30000001);
nv_wo32(dev, ramfc, 0x78/4, 0x00000000);
nv_wo32(dev, ramfc, 0x3c/4, 0x403f6078);
nv_wo32(dev, ramfc, 0x50/4, chan->pushbuf_base +
chan->dma.ib_base * 4);
nv_wo32(dev, ramfc, 0x54/4, drm_order(chan->dma.ib_max + 1) << 16);
if (!IS_G80) {
nv_wo32(dev, chan->ramin->gpuobj, 0, chan->id);
nv_wo32(dev, chan->ramin->gpuobj, 1,
chan->ramfc->instance >> 8);
nv_wo32(dev, ramfc, 0x88/4, chan->cache->instance >> 10);
nv_wo32(dev, ramfc, 0x98/4, chan->ramin->instance >> 12);
}
dev_priv->engine.instmem.finish_access(dev);
ret = nv50_fifo_channel_enable(dev, chan->id, false);
if (ret) {
NV_ERROR(dev, "error enabling ch%d: %d\n", chan->id, ret);
spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags);
nouveau_gpuobj_ref_del(dev, &chan->ramfc);
return ret;
}
spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags);
return 0;
}
void
nv50_fifo_destroy_context(struct nouveau_channel *chan)
{
struct drm_device *dev = chan->dev;
struct nouveau_gpuobj_ref *ramfc = chan->ramfc;
NV_DEBUG(dev, "ch%d\n", chan->id);
/* This will ensure the channel is seen as disabled. */
chan->ramfc = NULL;
nv50_fifo_channel_disable(dev, chan->id, false);
/* Dummy channel, also used on ch 127 */
if (chan->id == 0)
nv50_fifo_channel_disable(dev, 127, false);
nouveau_gpuobj_ref_del(dev, &ramfc);
nouveau_gpuobj_ref_del(dev, &chan->cache);
}
int
nv50_fifo_load_context(struct nouveau_channel *chan)
{
struct drm_device *dev = chan->dev;
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_gpuobj *ramfc = chan->ramfc->gpuobj;
struct nouveau_gpuobj *cache = chan->cache->gpuobj;
int ptr, cnt;
NV_DEBUG(dev, "ch%d\n", chan->id);
dev_priv->engine.instmem.prepare_access(dev, false);
nv_wr32(dev, 0x3330, nv_ro32(dev, ramfc, 0x00/4));
nv_wr32(dev, 0x3334, nv_ro32(dev, ramfc, 0x04/4));
nv_wr32(dev, 0x3240, nv_ro32(dev, ramfc, 0x08/4));
nv_wr32(dev, 0x3320, nv_ro32(dev, ramfc, 0x0c/4));
nv_wr32(dev, 0x3244, nv_ro32(dev, ramfc, 0x10/4));
nv_wr32(dev, 0x3328, nv_ro32(dev, ramfc, 0x14/4));
nv_wr32(dev, 0x3368, nv_ro32(dev, ramfc, 0x18/4));
nv_wr32(dev, 0x336c, nv_ro32(dev, ramfc, 0x1c/4));
nv_wr32(dev, 0x3370, nv_ro32(dev, ramfc, 0x20/4));
nv_wr32(dev, 0x3374, nv_ro32(dev, ramfc, 0x24/4));
nv_wr32(dev, 0x3378, nv_ro32(dev, ramfc, 0x28/4));
nv_wr32(dev, 0x337c, nv_ro32(dev, ramfc, 0x2c/4));
nv_wr32(dev, 0x3228, nv_ro32(dev, ramfc, 0x30/4));
nv_wr32(dev, 0x3364, nv_ro32(dev, ramfc, 0x34/4));
nv_wr32(dev, 0x32a0, nv_ro32(dev, ramfc, 0x38/4));
nv_wr32(dev, 0x3224, nv_ro32(dev, ramfc, 0x3c/4));
nv_wr32(dev, 0x324c, nv_ro32(dev, ramfc, 0x40/4));
nv_wr32(dev, 0x2044, nv_ro32(dev, ramfc, 0x44/4));
nv_wr32(dev, 0x322c, nv_ro32(dev, ramfc, 0x48/4));
nv_wr32(dev, 0x3234, nv_ro32(dev, ramfc, 0x4c/4));
nv_wr32(dev, 0x3340, nv_ro32(dev, ramfc, 0x50/4));
nv_wr32(dev, 0x3344, nv_ro32(dev, ramfc, 0x54/4));
nv_wr32(dev, 0x3280, nv_ro32(dev, ramfc, 0x58/4));
nv_wr32(dev, 0x3254, nv_ro32(dev, ramfc, 0x5c/4));
nv_wr32(dev, 0x3260, nv_ro32(dev, ramfc, 0x60/4));
nv_wr32(dev, 0x3264, nv_ro32(dev, ramfc, 0x64/4));
nv_wr32(dev, 0x3268, nv_ro32(dev, ramfc, 0x68/4));
nv_wr32(dev, 0x326c, nv_ro32(dev, ramfc, 0x6c/4));
nv_wr32(dev, 0x32e4, nv_ro32(dev, ramfc, 0x70/4));
nv_wr32(dev, 0x3248, nv_ro32(dev, ramfc, 0x74/4));
nv_wr32(dev, 0x2088, nv_ro32(dev, ramfc, 0x78/4));
nv_wr32(dev, 0x2058, nv_ro32(dev, ramfc, 0x7c/4));
nv_wr32(dev, 0x2210, nv_ro32(dev, ramfc, 0x80/4));
cnt = nv_ro32(dev, ramfc, 0x84/4);
for (ptr = 0; ptr < cnt; ptr++) {
nv_wr32(dev, NV40_PFIFO_CACHE1_METHOD(ptr),
nv_ro32(dev, cache, (ptr * 2) + 0));
nv_wr32(dev, NV40_PFIFO_CACHE1_DATA(ptr),
nv_ro32(dev, cache, (ptr * 2) + 1));
}
nv_wr32(dev, NV03_PFIFO_CACHE1_PUT, cnt << 2);
nv_wr32(dev, NV03_PFIFO_CACHE1_GET, 0);
/* guessing that all the 0x34xx regs aren't on NV50 */
if (!IS_G80) {
nv_wr32(dev, 0x340c, nv_ro32(dev, ramfc, 0x88/4));
nv_wr32(dev, 0x3400, nv_ro32(dev, ramfc, 0x8c/4));
nv_wr32(dev, 0x3404, nv_ro32(dev, ramfc, 0x90/4));
nv_wr32(dev, 0x3408, nv_ro32(dev, ramfc, 0x94/4));
nv_wr32(dev, 0x3410, nv_ro32(dev, ramfc, 0x98/4));
}
dev_priv->engine.instmem.finish_access(dev);
nv_wr32(dev, NV03_PFIFO_CACHE1_PUSH1, chan->id | (1<<16));
return 0;
}
int
nv50_fifo_unload_context(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_fifo_engine *pfifo = &dev_priv->engine.fifo;
struct nouveau_gpuobj *ramfc, *cache;
struct nouveau_channel *chan = NULL;
int chid, get, put, ptr;
NV_DEBUG(dev, "\n");
chid = pfifo->channel_id(dev);
if (chid < 1 || chid >= dev_priv->engine.fifo.channels - 1)
return 0;
chan = dev_priv->fifos[chid];
if (!chan) {
NV_ERROR(dev, "Inactive channel on PFIFO: %d\n", chid);
return -EINVAL;
}
NV_DEBUG(dev, "ch%d\n", chan->id);
ramfc = chan->ramfc->gpuobj;
cache = chan->cache->gpuobj;
dev_priv->engine.instmem.prepare_access(dev, true);
nv_wo32(dev, ramfc, 0x00/4, nv_rd32(dev, 0x3330));
nv_wo32(dev, ramfc, 0x04/4, nv_rd32(dev, 0x3334));
nv_wo32(dev, ramfc, 0x08/4, nv_rd32(dev, 0x3240));
nv_wo32(dev, ramfc, 0x0c/4, nv_rd32(dev, 0x3320));
nv_wo32(dev, ramfc, 0x10/4, nv_rd32(dev, 0x3244));
nv_wo32(dev, ramfc, 0x14/4, nv_rd32(dev, 0x3328));
nv_wo32(dev, ramfc, 0x18/4, nv_rd32(dev, 0x3368));
nv_wo32(dev, ramfc, 0x1c/4, nv_rd32(dev, 0x336c));
nv_wo32(dev, ramfc, 0x20/4, nv_rd32(dev, 0x3370));
nv_wo32(dev, ramfc, 0x24/4, nv_rd32(dev, 0x3374));
nv_wo32(dev, ramfc, 0x28/4, nv_rd32(dev, 0x3378));
nv_wo32(dev, ramfc, 0x2c/4, nv_rd32(dev, 0x337c));
nv_wo32(dev, ramfc, 0x30/4, nv_rd32(dev, 0x3228));
nv_wo32(dev, ramfc, 0x34/4, nv_rd32(dev, 0x3364));
nv_wo32(dev, ramfc, 0x38/4, nv_rd32(dev, 0x32a0));
nv_wo32(dev, ramfc, 0x3c/4, nv_rd32(dev, 0x3224));
nv_wo32(dev, ramfc, 0x40/4, nv_rd32(dev, 0x324c));
nv_wo32(dev, ramfc, 0x44/4, nv_rd32(dev, 0x2044));
nv_wo32(dev, ramfc, 0x48/4, nv_rd32(dev, 0x322c));
nv_wo32(dev, ramfc, 0x4c/4, nv_rd32(dev, 0x3234));
nv_wo32(dev, ramfc, 0x50/4, nv_rd32(dev, 0x3340));
nv_wo32(dev, ramfc, 0x54/4, nv_rd32(dev, 0x3344));
nv_wo32(dev, ramfc, 0x58/4, nv_rd32(dev, 0x3280));
nv_wo32(dev, ramfc, 0x5c/4, nv_rd32(dev, 0x3254));
nv_wo32(dev, ramfc, 0x60/4, nv_rd32(dev, 0x3260));
nv_wo32(dev, ramfc, 0x64/4, nv_rd32(dev, 0x3264));
nv_wo32(dev, ramfc, 0x68/4, nv_rd32(dev, 0x3268));
nv_wo32(dev, ramfc, 0x6c/4, nv_rd32(dev, 0x326c));
nv_wo32(dev, ramfc, 0x70/4, nv_rd32(dev, 0x32e4));
nv_wo32(dev, ramfc, 0x74/4, nv_rd32(dev, 0x3248));
nv_wo32(dev, ramfc, 0x78/4, nv_rd32(dev, 0x2088));
nv_wo32(dev, ramfc, 0x7c/4, nv_rd32(dev, 0x2058));
nv_wo32(dev, ramfc, 0x80/4, nv_rd32(dev, 0x2210));
put = (nv_rd32(dev, NV03_PFIFO_CACHE1_PUT) & 0x7ff) >> 2;
get = (nv_rd32(dev, NV03_PFIFO_CACHE1_GET) & 0x7ff) >> 2;
ptr = 0;
while (put != get) {
nv_wo32(dev, cache, ptr++,
nv_rd32(dev, NV40_PFIFO_CACHE1_METHOD(get)));
nv_wo32(dev, cache, ptr++,
nv_rd32(dev, NV40_PFIFO_CACHE1_DATA(get)));
get = (get + 1) & 0x1ff;
}
/* guessing that all the 0x34xx regs aren't on NV50 */
if (!IS_G80) {
nv_wo32(dev, ramfc, 0x84/4, ptr >> 1);
nv_wo32(dev, ramfc, 0x88/4, nv_rd32(dev, 0x340c));
nv_wo32(dev, ramfc, 0x8c/4, nv_rd32(dev, 0x3400));
nv_wo32(dev, ramfc, 0x90/4, nv_rd32(dev, 0x3404));
nv_wo32(dev, ramfc, 0x94/4, nv_rd32(dev, 0x3408));
nv_wo32(dev, ramfc, 0x98/4, nv_rd32(dev, 0x3410));
}
dev_priv->engine.instmem.finish_access(dev);
/*XXX: probably reload ch127 (NULL) state back too */
nv_wr32(dev, NV03_PFIFO_CACHE1_PUSH1, 127);
return 0;
}
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