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linux/drivers/gpu/drm/nouveau/nv04_fifo.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"
#include "nouveau_ramht.h"
#include "nouveau_util.h"
#define NV04_RAMFC(c) (dev_priv->ramfc->pinst + ((c) * NV04_RAMFC__SIZE))
#define NV04_RAMFC__SIZE 32
#define NV04_RAMFC_DMA_PUT 0x00
#define NV04_RAMFC_DMA_GET 0x04
#define NV04_RAMFC_DMA_INSTANCE 0x08
#define NV04_RAMFC_DMA_STATE 0x0C
#define NV04_RAMFC_DMA_FETCH 0x10
#define NV04_RAMFC_ENGINE 0x14
#define NV04_RAMFC_PULL1_ENGINE 0x18
#define RAMFC_WR(offset, val) nv_wo32(chan->ramfc, NV04_RAMFC_##offset, (val))
#define RAMFC_RD(offset) nv_ro32(chan->ramfc, NV04_RAMFC_##offset)
void
nv04_fifo_disable(struct drm_device *dev)
{
uint32_t tmp;
tmp = nv_rd32(dev, NV04_PFIFO_CACHE1_DMA_PUSH);
nv_wr32(dev, NV04_PFIFO_CACHE1_DMA_PUSH, tmp & ~1);
nv_wr32(dev, NV03_PFIFO_CACHE1_PUSH0, 0);
tmp = nv_rd32(dev, NV03_PFIFO_CACHE1_PULL1);
nv_wr32(dev, NV04_PFIFO_CACHE1_PULL0, tmp & ~1);
}
void
nv04_fifo_enable(struct drm_device *dev)
{
nv_wr32(dev, NV03_PFIFO_CACHE1_PUSH0, 1);
nv_wr32(dev, NV04_PFIFO_CACHE1_PULL0, 1);
}
bool
nv04_fifo_reassign(struct drm_device *dev, bool enable)
{
uint32_t reassign = nv_rd32(dev, NV03_PFIFO_CACHES);
nv_wr32(dev, NV03_PFIFO_CACHES, enable ? 1 : 0);
return (reassign == 1);
}
bool
nv04_fifo_cache_pull(struct drm_device *dev, bool enable)
{
int pull = nv_mask(dev, NV04_PFIFO_CACHE1_PULL0, 1, enable);
if (!enable) {
/* In some cases the PFIFO puller may be left in an
* inconsistent state if you try to stop it when it's
* busy translating handles. Sometimes you get a
* PFIFO_CACHE_ERROR, sometimes it just fails silently
* sending incorrect instance offsets to PGRAPH after
* it's started up again. To avoid the latter we
* invalidate the most recently calculated instance.
*/
if (!nv_wait(dev, NV04_PFIFO_CACHE1_PULL0,
NV04_PFIFO_CACHE1_PULL0_HASH_BUSY, 0))
NV_ERROR(dev, "Timeout idling the PFIFO puller.\n");
if (nv_rd32(dev, NV04_PFIFO_CACHE1_PULL0) &
NV04_PFIFO_CACHE1_PULL0_HASH_FAILED)
nv_wr32(dev, NV03_PFIFO_INTR_0,
NV_PFIFO_INTR_CACHE_ERROR);
nv_wr32(dev, NV04_PFIFO_CACHE1_HASH, 0);
}
return pull & 1;
}
int
nv04_fifo_channel_id(struct drm_device *dev)
{
return nv_rd32(dev, NV03_PFIFO_CACHE1_PUSH1) &
NV03_PFIFO_CACHE1_PUSH1_CHID_MASK;
}
#ifdef __BIG_ENDIAN
#define DMA_FETCH_ENDIANNESS NV_PFIFO_CACHE1_BIG_ENDIAN
#else
#define DMA_FETCH_ENDIANNESS 0
#endif
int
nv04_fifo_create_context(struct nouveau_channel *chan)
{
struct drm_device *dev = chan->dev;
struct drm_nouveau_private *dev_priv = dev->dev_private;
unsigned long flags;
int ret;
ret = nouveau_gpuobj_new_fake(dev, NV04_RAMFC(chan->id), ~0,
NV04_RAMFC__SIZE,
NVOBJ_FLAG_ZERO_ALLOC |
NVOBJ_FLAG_ZERO_FREE,
&chan->ramfc);
if (ret)
return ret;
chan->user = ioremap(pci_resource_start(dev->pdev, 0) +
NV03_USER(chan->id), PAGE_SIZE);
if (!chan->user)
return -ENOMEM;
spin_lock_irqsave(&dev_priv->context_switch_lock, flags);
/* Setup initial state */
RAMFC_WR(DMA_PUT, chan->pushbuf_base);
RAMFC_WR(DMA_GET, chan->pushbuf_base);
RAMFC_WR(DMA_INSTANCE, chan->pushbuf->pinst >> 4);
RAMFC_WR(DMA_FETCH, (NV_PFIFO_CACHE1_DMA_FETCH_TRIG_128_BYTES |
NV_PFIFO_CACHE1_DMA_FETCH_SIZE_128_BYTES |
NV_PFIFO_CACHE1_DMA_FETCH_MAX_REQS_8 |
DMA_FETCH_ENDIANNESS));
/* enable the fifo dma operation */
nv_wr32(dev, NV04_PFIFO_MODE,
nv_rd32(dev, NV04_PFIFO_MODE) | (1 << chan->id));
spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags);
return 0;
}
void
nv04_fifo_destroy_context(struct nouveau_channel *chan)
{
struct drm_device *dev = chan->dev;
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_fifo_engine *pfifo = &dev_priv->engine.fifo;
unsigned long flags;
spin_lock_irqsave(&dev_priv->context_switch_lock, flags);
pfifo->reassign(dev, false);
/* Unload the context if it's the currently active one */
if (pfifo->channel_id(dev) == chan->id) {
pfifo->disable(dev);
pfifo->unload_context(dev);
pfifo->enable(dev);
}
/* Keep it from being rescheduled */
nv_mask(dev, NV04_PFIFO_MODE, 1 << chan->id, 0);
pfifo->reassign(dev, true);
spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags);
/* Free the channel resources */
if (chan->user) {
iounmap(chan->user);
chan->user = NULL;
}
nouveau_gpuobj_ref(NULL, &chan->ramfc);
}
static void
nv04_fifo_do_load_context(struct drm_device *dev, int chid)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
uint32_t fc = NV04_RAMFC(chid), tmp;
nv_wr32(dev, NV04_PFIFO_CACHE1_DMA_PUT, nv_ri32(dev, fc + 0));
nv_wr32(dev, NV04_PFIFO_CACHE1_DMA_GET, nv_ri32(dev, fc + 4));
tmp = nv_ri32(dev, fc + 8);
nv_wr32(dev, NV04_PFIFO_CACHE1_DMA_INSTANCE, tmp & 0xFFFF);
nv_wr32(dev, NV04_PFIFO_CACHE1_DMA_DCOUNT, tmp >> 16);
nv_wr32(dev, NV04_PFIFO_CACHE1_DMA_STATE, nv_ri32(dev, fc + 12));
nv_wr32(dev, NV04_PFIFO_CACHE1_DMA_FETCH, nv_ri32(dev, fc + 16));
nv_wr32(dev, NV04_PFIFO_CACHE1_ENGINE, nv_ri32(dev, fc + 20));
nv_wr32(dev, NV04_PFIFO_CACHE1_PULL1, nv_ri32(dev, fc + 24));
nv_wr32(dev, NV03_PFIFO_CACHE1_GET, 0);
nv_wr32(dev, NV03_PFIFO_CACHE1_PUT, 0);
}
int
nv04_fifo_load_context(struct nouveau_channel *chan)
{
uint32_t tmp;
nv_wr32(chan->dev, NV03_PFIFO_CACHE1_PUSH1,
NV03_PFIFO_CACHE1_PUSH1_DMA | chan->id);
nv04_fifo_do_load_context(chan->dev, chan->id);
nv_wr32(chan->dev, NV04_PFIFO_CACHE1_DMA_PUSH, 1);
/* Reset NV04_PFIFO_CACHE1_DMA_CTL_AT_INFO to INVALID */
tmp = nv_rd32(chan->dev, NV04_PFIFO_CACHE1_DMA_CTL) & ~(1 << 31);
nv_wr32(chan->dev, NV04_PFIFO_CACHE1_DMA_CTL, tmp);
return 0;
}
int
nv04_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_channel *chan = NULL;
uint32_t tmp;
int chid;
chid = pfifo->channel_id(dev);
if (chid < 0 || chid >= dev_priv->engine.fifo.channels)
return 0;
chan = dev_priv->channels.ptr[chid];
if (!chan) {
NV_ERROR(dev, "Inactive channel on PFIFO: %d\n", chid);
return -EINVAL;
}
RAMFC_WR(DMA_PUT, nv_rd32(dev, NV04_PFIFO_CACHE1_DMA_PUT));
RAMFC_WR(DMA_GET, nv_rd32(dev, NV04_PFIFO_CACHE1_DMA_GET));
tmp = nv_rd32(dev, NV04_PFIFO_CACHE1_DMA_DCOUNT) << 16;
tmp |= nv_rd32(dev, NV04_PFIFO_CACHE1_DMA_INSTANCE);
RAMFC_WR(DMA_INSTANCE, tmp);
RAMFC_WR(DMA_STATE, nv_rd32(dev, NV04_PFIFO_CACHE1_DMA_STATE));
RAMFC_WR(DMA_FETCH, nv_rd32(dev, NV04_PFIFO_CACHE1_DMA_FETCH));
RAMFC_WR(ENGINE, nv_rd32(dev, NV04_PFIFO_CACHE1_ENGINE));
RAMFC_WR(PULL1_ENGINE, nv_rd32(dev, NV04_PFIFO_CACHE1_PULL1));
nv04_fifo_do_load_context(dev, pfifo->channels - 1);
nv_wr32(dev, NV03_PFIFO_CACHE1_PUSH1, pfifo->channels - 1);
return 0;
}
static void
nv04_fifo_init_reset(struct drm_device *dev)
{
nv_wr32(dev, NV03_PMC_ENABLE,
nv_rd32(dev, NV03_PMC_ENABLE) & ~NV_PMC_ENABLE_PFIFO);
nv_wr32(dev, NV03_PMC_ENABLE,
nv_rd32(dev, NV03_PMC_ENABLE) | NV_PMC_ENABLE_PFIFO);
nv_wr32(dev, 0x003224, 0x000f0078);
nv_wr32(dev, 0x002044, 0x0101ffff);
nv_wr32(dev, 0x002040, 0x000000ff);
nv_wr32(dev, 0x002500, 0x00000000);
nv_wr32(dev, 0x003000, 0x00000000);
nv_wr32(dev, 0x003050, 0x00000000);
nv_wr32(dev, 0x003200, 0x00000000);
nv_wr32(dev, 0x003250, 0x00000000);
nv_wr32(dev, 0x003220, 0x00000000);
nv_wr32(dev, 0x003250, 0x00000000);
nv_wr32(dev, 0x003270, 0x00000000);
nv_wr32(dev, 0x003210, 0x00000000);
}
static void
nv04_fifo_init_ramxx(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
nv_wr32(dev, NV03_PFIFO_RAMHT, (0x03 << 24) /* search 128 */ |
((dev_priv->ramht->bits - 9) << 16) |
(dev_priv->ramht->gpuobj->pinst >> 8));
nv_wr32(dev, NV03_PFIFO_RAMRO, dev_priv->ramro->pinst >> 8);
nv_wr32(dev, NV03_PFIFO_RAMFC, dev_priv->ramfc->pinst >> 8);
}
static void
nv04_fifo_init_intr(struct drm_device *dev)
{
nouveau_irq_register(dev, 8, nv04_fifo_isr);
nv_wr32(dev, 0x002100, 0xffffffff);
nv_wr32(dev, 0x002140, 0xffffffff);
}
int
nv04_fifo_init(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_fifo_engine *pfifo = &dev_priv->engine.fifo;
int i;
nv04_fifo_init_reset(dev);
nv04_fifo_init_ramxx(dev);
nv04_fifo_do_load_context(dev, pfifo->channels - 1);
nv_wr32(dev, NV03_PFIFO_CACHE1_PUSH1, pfifo->channels - 1);
nv04_fifo_init_intr(dev);
pfifo->enable(dev);
pfifo->reassign(dev, true);
for (i = 0; i < dev_priv->engine.fifo.channels; i++) {
if (dev_priv->channels.ptr[i]) {
uint32_t mode = nv_rd32(dev, NV04_PFIFO_MODE);
nv_wr32(dev, NV04_PFIFO_MODE, mode | (1 << i));
}
}
return 0;
}
void
nv04_fifo_fini(struct drm_device *dev)
{
nv_wr32(dev, 0x2140, 0x00000000);
nouveau_irq_unregister(dev, 8);
}
static bool
nouveau_fifo_swmthd(struct drm_device *dev, u32 chid, u32 addr, u32 data)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_channel *chan = NULL;
struct nouveau_gpuobj *obj;
unsigned long flags;
const int subc = (addr >> 13) & 0x7;
const int mthd = addr & 0x1ffc;
bool handled = false;
u32 engine;
spin_lock_irqsave(&dev_priv->channels.lock, flags);
if (likely(chid >= 0 && chid < dev_priv->engine.fifo.channels))
chan = dev_priv->channels.ptr[chid];
if (unlikely(!chan))
goto out;
switch (mthd) {
case 0x0000: /* bind object to subchannel */
obj = nouveau_ramht_find(chan, data);
if (unlikely(!obj || obj->engine != NVOBJ_ENGINE_SW))
break;
chan->sw_subchannel[subc] = obj->class;
engine = 0x0000000f << (subc * 4);
nv_mask(dev, NV04_PFIFO_CACHE1_ENGINE, engine, 0x00000000);
handled = true;
break;
default:
engine = nv_rd32(dev, NV04_PFIFO_CACHE1_ENGINE);
if (unlikely(((engine >> (subc * 4)) & 0xf) != 0))
break;
if (!nouveau_gpuobj_mthd_call(chan, chan->sw_subchannel[subc],
mthd, data))
handled = true;
break;
}
out:
spin_unlock_irqrestore(&dev_priv->channels.lock, flags);
return handled;
}
static const char *nv_dma_state_err(u32 state)
{
static const char * const desc[] = {
"NONE", "CALL_SUBR_ACTIVE", "INVALID_MTHD", "RET_SUBR_INACTIVE",
"INVALID_CMD", "IB_EMPTY"/* NV50+ */, "MEM_FAULT", "UNK"
};
return desc[(state >> 29) & 0x7];
}
void
nv04_fifo_isr(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_engine *engine = &dev_priv->engine;
uint32_t status, reassign;
int cnt = 0;
reassign = nv_rd32(dev, NV03_PFIFO_CACHES) & 1;
while ((status = nv_rd32(dev, NV03_PFIFO_INTR_0)) && (cnt++ < 100)) {
uint32_t chid, get;
nv_wr32(dev, NV03_PFIFO_CACHES, 0);
chid = engine->fifo.channel_id(dev);
get = nv_rd32(dev, NV03_PFIFO_CACHE1_GET);
if (status & NV_PFIFO_INTR_CACHE_ERROR) {
uint32_t mthd, data;
int ptr;
/* NV_PFIFO_CACHE1_GET actually goes to 0xffc before
* wrapping on my G80 chips, but CACHE1 isn't big
* enough for this much data.. Tests show that it
* wraps around to the start at GET=0x800.. No clue
* as to why..
*/
ptr = (get & 0x7ff) >> 2;
if (dev_priv->card_type < NV_40) {
mthd = nv_rd32(dev,
NV04_PFIFO_CACHE1_METHOD(ptr));
data = nv_rd32(dev,
NV04_PFIFO_CACHE1_DATA(ptr));
} else {
mthd = nv_rd32(dev,
NV40_PFIFO_CACHE1_METHOD(ptr));
data = nv_rd32(dev,
NV40_PFIFO_CACHE1_DATA(ptr));
}
if (!nouveau_fifo_swmthd(dev, chid, mthd, data)) {
NV_INFO(dev, "PFIFO_CACHE_ERROR - Ch %d/%d "
"Mthd 0x%04x Data 0x%08x\n",
chid, (mthd >> 13) & 7, mthd & 0x1ffc,
data);
}
nv_wr32(dev, NV04_PFIFO_CACHE1_DMA_PUSH, 0);
nv_wr32(dev, NV03_PFIFO_INTR_0,
NV_PFIFO_INTR_CACHE_ERROR);
nv_wr32(dev, NV03_PFIFO_CACHE1_PUSH0,
nv_rd32(dev, NV03_PFIFO_CACHE1_PUSH0) & ~1);
nv_wr32(dev, NV03_PFIFO_CACHE1_GET, get + 4);
nv_wr32(dev, NV03_PFIFO_CACHE1_PUSH0,
nv_rd32(dev, NV03_PFIFO_CACHE1_PUSH0) | 1);
nv_wr32(dev, NV04_PFIFO_CACHE1_HASH, 0);
nv_wr32(dev, NV04_PFIFO_CACHE1_DMA_PUSH,
nv_rd32(dev, NV04_PFIFO_CACHE1_DMA_PUSH) | 1);
nv_wr32(dev, NV04_PFIFO_CACHE1_PULL0, 1);
status &= ~NV_PFIFO_INTR_CACHE_ERROR;
}
if (status & NV_PFIFO_INTR_DMA_PUSHER) {
u32 dma_get = nv_rd32(dev, 0x003244);
u32 dma_put = nv_rd32(dev, 0x003240);
u32 push = nv_rd32(dev, 0x003220);
u32 state = nv_rd32(dev, 0x003228);
if (dev_priv->card_type == NV_50) {
u32 ho_get = nv_rd32(dev, 0x003328);
u32 ho_put = nv_rd32(dev, 0x003320);
u32 ib_get = nv_rd32(dev, 0x003334);
u32 ib_put = nv_rd32(dev, 0x003330);
if (nouveau_ratelimit())
NV_INFO(dev, "PFIFO_DMA_PUSHER - Ch %d Get 0x%02x%08x "
"Put 0x%02x%08x IbGet 0x%08x IbPut 0x%08x "
"State 0x%08x (err: %s) Push 0x%08x\n",
chid, ho_get, dma_get, ho_put,
dma_put, ib_get, ib_put, state,
nv_dma_state_err(state),
push);
/* METHOD_COUNT, in DMA_STATE on earlier chipsets */
nv_wr32(dev, 0x003364, 0x00000000);
if (dma_get != dma_put || ho_get != ho_put) {
nv_wr32(dev, 0x003244, dma_put);
nv_wr32(dev, 0x003328, ho_put);
} else
if (ib_get != ib_put) {
nv_wr32(dev, 0x003334, ib_put);
}
} else {
NV_INFO(dev, "PFIFO_DMA_PUSHER - Ch %d Get 0x%08x "
"Put 0x%08x State 0x%08x (err: %s) Push 0x%08x\n",
chid, dma_get, dma_put, state,
nv_dma_state_err(state), push);
if (dma_get != dma_put)
nv_wr32(dev, 0x003244, dma_put);
}
nv_wr32(dev, 0x003228, 0x00000000);
nv_wr32(dev, 0x003220, 0x00000001);
nv_wr32(dev, 0x002100, NV_PFIFO_INTR_DMA_PUSHER);
status &= ~NV_PFIFO_INTR_DMA_PUSHER;
}
if (status & NV_PFIFO_INTR_SEMAPHORE) {
uint32_t sem;
status &= ~NV_PFIFO_INTR_SEMAPHORE;
nv_wr32(dev, NV03_PFIFO_INTR_0,
NV_PFIFO_INTR_SEMAPHORE);
sem = nv_rd32(dev, NV10_PFIFO_CACHE1_SEMAPHORE);
nv_wr32(dev, NV10_PFIFO_CACHE1_SEMAPHORE, sem | 0x1);
nv_wr32(dev, NV03_PFIFO_CACHE1_GET, get + 4);
nv_wr32(dev, NV04_PFIFO_CACHE1_PULL0, 1);
}
if (dev_priv->card_type == NV_50) {
if (status & 0x00000010) {
nv50_fb_vm_trap(dev, nouveau_ratelimit());
status &= ~0x00000010;
nv_wr32(dev, 0x002100, 0x00000010);
}
}
if (status) {
if (nouveau_ratelimit())
NV_INFO(dev, "PFIFO_INTR 0x%08x - Ch %d\n",
status, chid);
nv_wr32(dev, NV03_PFIFO_INTR_0, status);
status = 0;
}
nv_wr32(dev, NV03_PFIFO_CACHES, reassign);
}
if (status) {
NV_INFO(dev, "PFIFO still angry after %d spins, halt\n", cnt);
nv_wr32(dev, 0x2140, 0);
nv_wr32(dev, 0x140, 0);
}
nv_wr32(dev, NV03_PMC_INTR_0, NV_PMC_INTR_0_PFIFO_PENDING);
}
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