/*
* Copyright (C) 2006 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.
*
*/
/*
* Authors:
* Ben Skeggs <darktama@iinet.net.au>
*/
#include "drmP.h"
#include "drm.h"
#include "nouveau_drm.h"
#include "nouveau_drv.h"
#include "nouveau_reg.h"
#include <linux/ratelimit.h>
/* needed for hotplug irq */
#include "nouveau_connector.h"
#include "nv50_display.h"
void
nouveau_irq_preinstall(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
/* Master disable */
nv_wr32(dev, NV03_PMC_INTR_EN_0, 0);
if (dev_priv->card_type == NV_50) {
INIT_WORK(&dev_priv->irq_work, nv50_display_irq_handler_bh);
INIT_WORK(&dev_priv->hpd_work, nv50_display_irq_hotplug_bh);
INIT_LIST_HEAD(&dev_priv->vbl_waiting);
}
}
int
nouveau_irq_postinstall(struct drm_device *dev)
{
/* Master enable */
nv_wr32(dev, NV03_PMC_INTR_EN_0, NV_PMC_INTR_EN_0_MASTER_ENABLE);
return 0;
}
void
nouveau_irq_uninstall(struct drm_device *dev)
{
/* Master disable */
nv_wr32(dev, NV03_PMC_INTR_EN_0, 0);
}
static int
nouveau_call_method(struct nouveau_channel *chan, int class, int mthd, int data)
{
struct drm_nouveau_private *dev_priv = chan->dev->dev_private;
struct nouveau_pgraph_object_method *grm;
struct nouveau_pgraph_object_class *grc;
grc = dev_priv->engine.graph.grclass;
while (grc->id) {
if (grc->id == class)
break;
grc++;
}
if (grc->id != class || !grc->methods)
return -ENOENT;
grm = grc->methods;
while (grm->id) {
if (grm->id == mthd)
return grm->exec(chan, class, mthd, data);
grm++;
}
return -ENOENT;
}
static bool
nouveau_fifo_swmthd(struct nouveau_channel *chan, uint32_t addr, uint32_t data)
{
struct drm_device *dev = chan->dev;
const int subc = (addr >> 13) & 0x7;
const int mthd = addr & 0x1ffc;
if (mthd == 0x0000) {
struct nouveau_gpuobj_ref *ref = NULL;
if (nouveau_gpuobj_ref_find(chan, data, &ref))
return false;
if (ref->gpuobj->engine != NVOBJ_ENGINE_SW)
return false;
chan->sw_subchannel[subc] = ref->gpuobj->class;
nv_wr32(dev, NV04_PFIFO_CACHE1_ENGINE, nv_rd32(dev,
NV04_PFIFO_CACHE1_ENGINE) & ~(0xf << subc * 4));
return true;
}
/* hw object */
if (nv_rd32(dev, NV04_PFIFO_CACHE1_ENGINE) & (1 << (subc*4)))
return false;
if (nouveau_call_method(chan, chan->sw_subchannel[subc], mthd, data))
return false;
return true;
}
static void
nouveau_fifo_irq_handler(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)) {
struct nouveau_channel *chan = NULL;
uint32_t chid, get;
nv_wr32(dev, NV03_PFIFO_CACHES, 0);
chid = engine->fifo.channel_id(dev);
if (chid >= 0 && chid < engine->fifo.channels)
chan = dev_priv->fifos[chid];
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 (!chan || !nouveau_fifo_swmthd(chan, 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) {
NV_INFO(dev, "PFIFO_DMA_PUSHER - Ch %d\n", chid);
status &= ~NV_PFIFO_INTR_DMA_PUSHER;
nv_wr32(dev, NV03_PFIFO_INTR_0,
NV_PFIFO_INTR_DMA_PUSHER);
nv_wr32(dev, NV04_PFIFO_CACHE1_DMA_STATE, 0x00000000);
if (nv_rd32(dev, NV04_PFIFO_CACHE1_DMA_PUT) != get)
nv_wr32(dev, NV04_PFIFO_CACHE1_DMA_GET,
get + 4);
}
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 (status) {
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);
}
struct nouveau_bitfield_names {
uint32_t mask;
const char *name;
};
static struct nouveau_bitfield_names nstatus_names[] =
{
{ NV04_PGRAPH_NSTATUS_STATE_IN_USE, "STATE_IN_USE" },
{ NV04_PGRAPH_NSTATUS_INVALID_STATE, "INVALID_STATE" },
{ NV04_PGRAPH_NSTATUS_BAD_ARGUMENT, "BAD_ARGUMENT" },
{ NV04_PGRAPH_NSTATUS_PROTECTION_FAULT, "PROTECTION_FAULT" }
};
static struct nouveau_bitfield_names nstatus_names_nv10[] =
{
{ NV10_PGRAPH_NSTATUS_STATE_IN_USE, "STATE_IN_USE" },
{ NV10_PGRAPH_NSTATUS_INVALID_STATE, "INVALID_STATE" },
{ NV10_PGRAPH_NSTATUS_BAD_ARGUMENT, "BAD_ARGUMENT" },
{ NV10_PGRAPH_NSTATUS_PROTECTION_FAULT, "PROTECTION_FAULT" }
};
static struct nouveau_bitfield_names nsource_names[] =
{
{ NV03_PGRAPH_NSOURCE_NOTIFICATION, "NOTIFICATION" },
{ NV03_PGRAPH_NSOURCE_DATA_ERROR, "DATA_ERROR" },
{ NV03_PGRAPH_NSOURCE_PROTECTION_ERROR, "PROTECTION_ERROR" },
{ NV03_PGRAPH_NSOURCE_RANGE_EXCEPTION, "RANGE_EXCEPTION" },
{ NV03_PGRAPH_NSOURCE_LIMIT_COLOR, "LIMIT_COLOR" },
{ NV03_PGRAPH_NSOURCE_LIMIT_ZETA, "LIMIT_ZETA" },
{ NV03_PGRAPH_NSOURCE_ILLEGAL_MTHD, "ILLEGAL_MTHD" },
{ NV03_PGRAPH_NSOURCE_DMA_R_PROTECTION, "DMA_R_PROTECTION" },
{ NV03_PGRAPH_NSOURCE_DMA_W_PROTECTION, "DMA_W_PROTECTION" },
{ NV03_PGRAPH_NSOURCE_FORMAT_EXCEPTION, "FORMAT_EXCEPTION" },
{ NV03_PGRAPH_NSOURCE_PATCH_EXCEPTION, "PATCH_EXCEPTION" },
{ NV03_PGRAPH_NSOURCE_STATE_INVALID, "STATE_INVALID" },
{ NV03_PGRAPH_NSOURCE_DOUBLE_NOTIFY, "DOUBLE_NOTIFY" },
{ NV03_PGRAPH_NSOURCE_NOTIFY_IN_USE, "NOTIFY_IN_USE" },
{ NV03_PGRAPH_NSOURCE_METHOD_CNT, "METHOD_CNT" },
{ NV03_PGRAPH_NSOURCE_BFR_NOTIFICATION, "BFR_NOTIFICATION" },
{ NV03_PGRAPH_NSOURCE_DMA_VTX_PROTECTION, "DMA_VTX_PROTECTION" },
{ NV03_PGRAPH_NSOURCE_DMA_WIDTH_A, "DMA_WIDTH_A" },
{ NV03_PGRAPH_NSOURCE_DMA_WIDTH_B, "DMA_WIDTH_B" },
};
static void
nouveau_print_bitfield_names_(uint32_t value,
const struct nouveau_bitfield_names *namelist,
const int namelist_len)
{
/*
* Caller must have already printed the KERN_* log level for us.
* Also the caller is responsible for adding the newline.
*/
int i;
for (i = 0; i < namelist_len; ++i) {
uint32_t mask = namelist[i].mask;
if (value & mask) {
printk(" %s", namelist[i].name);
value &= ~mask;
}
}
if (value)
printk(" (unknown bits 0x%08x)", value);
}
#define nouveau_print_bitfield_names(val, namelist) \
nouveau_print_bitfield_names_((val), (namelist), ARRAY_SIZE(namelist))
struct nouveau_enum_names {
uint32_t value;
const char *name;
};
static void
nouveau_print_enum_names_(uint32_t value,
const struct nouveau_enum_names *namelist,
const int namelist_len)
{
/*
* Caller must have already printed the KERN_* log level for us.
* Also the caller is responsible for adding the newline.
*/
int i;
for (i = 0; i < namelist_len; ++i) {
if (value == namelist[i].value) {
printk("%s", namelist[i].name);
return;
}
}
printk("unknown value 0x%08x", value);
}
#define nouveau_print_enum_names(val, namelist) \
nouveau_print_enum_names_((val), (namelist), ARRAY_SIZE(namelist))
static int
nouveau_graph_chid_from_grctx(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
uint32_t inst;
int i;
if (dev_priv->card_type < NV_40)
return dev_priv->engine.fifo.channels;
else
if (dev_priv->card_type < NV_50) {
inst = (nv_rd32(dev, 0x40032c) & 0xfffff) << 4;
for (i = 0; i < dev_priv->engine.fifo.channels; i++) {
struct nouveau_channel *chan = dev_priv->fifos[i];
if (!chan || !chan->ramin_grctx)
continue;
if (inst == chan->ramin_grctx->instance)
break;
}
} else {
inst = (nv_rd32(dev, 0x40032c) & 0xfffff) << 12;
for (i = 0; i < dev_priv->engine.fifo.channels; i++) {
struct nouveau_channel *chan = dev_priv->fifos[i];
if (!chan || !chan->ramin)
continue;
if (inst == chan->ramin->instance)
break;
}
}
return i;
}
static int
nouveau_graph_trapped_channel(struct drm_device *dev, int *channel_ret)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_engine *engine = &dev_priv->engine;
int channel;
if (dev_priv->card_type < NV_10)
channel = (nv_rd32(dev, NV04_PGRAPH_TRAPPED_ADDR) >> 24) & 0xf;
else
if (dev_priv->card_type < NV_40)
channel = (nv_rd32(dev, NV04_PGRAPH_TRAPPED_ADDR) >> 20) & 0x1f;
else
channel = nouveau_graph_chid_from_grctx(dev);
if (channel >= engine->fifo.channels || !dev_priv->fifos[channel]) {
NV_ERROR(dev, "AIII, invalid/inactive channel id %d\n", channel);
return -EINVAL;
}
*channel_ret = channel;
return 0;
}
struct nouveau_pgraph_trap {
int channel;
int class;
int subc, mthd, size;
uint32_t data, data2;
uint32_t nsource, nstatus;
};
static void
nouveau_graph_trap_info(struct drm_device *dev,
struct nouveau_pgraph_trap *trap)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
uint32_t address;
trap->nsource = trap->nstatus = 0;
if (dev_priv->card_type < NV_50) {
trap->nsource = nv_rd32(dev, NV03_PGRAPH_NSOURCE);
trap->nstatus = nv_rd32(dev, NV03_PGRAPH_NSTATUS);
}
if (nouveau_graph_trapped_channel(dev, &trap->channel))
trap->channel = -1;
address = nv_rd32(dev, NV04_PGRAPH_TRAPPED_ADDR);
trap->mthd = address & 0x1FFC;
trap->data = nv_rd32(dev, NV04_PGRAPH_TRAPPED_DATA);
if (dev_priv->card_type < NV_10) {
trap->subc = (address >> 13) & 0x7;
} else {
trap->subc = (address >> 16) & 0x7;
trap->data2 = nv_rd32(dev, NV10_PGRAPH_TRAPPED_DATA_HIGH);
}
if (dev_priv->card_type < NV_10)
trap->class = nv_rd32(dev, 0x400180 + trap->subc*4) & 0xFF;
else if (dev_priv->card_type < NV_40)
trap->class = nv_rd32(dev, 0x400160 + trap->subc*4) & 0xFFF;
else if (dev_priv->card_type < NV_50)
trap->class = nv_rd32(dev, 0x400160 + trap->subc*4) & 0xFFFF;
else
trap->class = nv_rd32(dev, 0x400814);
}
static void
nouveau_graph_dump_trap_info(struct drm_device *dev, const char *id,
struct nouveau_pgraph_trap *trap)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
uint32_t nsource = trap->nsource, nstatus = trap->nstatus;
if (dev_priv->card_type < NV_50) {
NV_INFO(dev, "%s - nSource:", id);
nouveau_print_bitfield_names(nsource, nsource_names);
printk(", nStatus:");
if (dev_priv->card_type < NV_10)
nouveau_print_bitfield_names(nstatus, nstatus_names);
else
nouveau_print_bitfield_names(nstatus, nstatus_names_nv10);
printk("\n");
}
NV_INFO(dev, "%s - Ch %d/%d Class 0x%04x Mthd 0x%04x "
"Data 0x%08x:0x%08x\n",
id, trap->channel, trap->subc,
trap->class, trap->mthd,
trap->data2, trap->data);
}
static int
nouveau_pgraph_intr_swmthd(struct drm_device *dev,
struct nouveau_pgraph_trap *trap)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
if (trap->channel < 0 ||
trap->channel >= dev_priv->engine.fifo.channels ||
!dev_priv->fifos[trap->channel])
return -ENODEV;
return nouveau_call_method(dev_priv->fifos[trap->channel],
trap->class, trap->mthd, trap->data);
}
static inline void
nouveau_pgraph_intr_notify(struct drm_device *dev, uint32_t nsource)
{
struct nouveau_pgraph_trap trap;
int unhandled = 0;
nouveau_graph_trap_info(dev, &trap);
if (nsource & NV03_PGRAPH_NSOURCE_ILLEGAL_MTHD) {
if (nouveau_pgraph_intr_swmthd(dev, &trap))
unhandled = 1;
} else {
unhandled = 1;
}
if (unhandled)
nouveau_graph_dump_trap_info(dev, "PGRAPH_NOTIFY", &trap);
}
static DEFINE_RATELIMIT_STATE(nouveau_ratelimit_state, 3 * HZ, 20);
static int nouveau_ratelimit(void)
{
return __ratelimit(&nouveau_ratelimit_state);
}
static inline void
nouveau_pgraph_intr_error(struct drm_device *dev, uint32_t nsource)
{
struct nouveau_pgraph_trap trap;
int unhandled = 0;
nouveau_graph_trap_info(dev, &trap);
trap.nsource = nsource;
if (nsource & NV03_PGRAPH_NSOURCE_ILLEGAL_MTHD) {
if (nouveau_pgraph_intr_swmthd(dev, &trap))
unhandled = 1;
} else if (nsource & NV03_PGRAPH_NSOURCE_DMA_VTX_PROTECTION) {
uint32_t v = nv_rd32(dev, 0x402000);
nv_wr32(dev, 0x402000, v);
/* dump the error anyway for now: it's useful for
Gallium development */
unhandled = 1;
} else {
unhandled = 1;
}
if (unhandled && nouveau_ratelimit())
nouveau_graph_dump_trap_info(dev, "PGRAPH_ERROR", &trap);
}
static inline void
nouveau_pgraph_intr_context_switch(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_engine *engine = &dev_priv->engine;
uint32_t chid;
chid = engine->fifo.channel_id(dev);
NV_DEBUG(dev, "PGRAPH context switch interrupt channel %x\n", chid);
switch (dev_priv->card_type) {
case NV_04:
nv04_graph_context_switch(dev);
break;
case NV_10:
nv10_graph_context_switch(dev);
break;
default:
NV_ERROR(dev, "Context switch not implemented\n");
break;
}
}
static void
nouveau_pgraph_irq_handler(struct drm_device *dev)
{
uint32_t status;
while ((status = nv_rd32(dev, NV03_PGRAPH_INTR))) {
uint32_t nsource = nv_rd32(dev, NV03_PGRAPH_NSOURCE);
if (status & NV_PGRAPH_INTR_NOTIFY) {
nouveau_pgraph_intr_notify(dev, nsource);
status &= ~NV_PGRAPH_INTR_NOTIFY;
nv_wr32(dev, NV03_PGRAPH_INTR, NV_PGRAPH_INTR_NOTIFY);
}
if (status & NV_PGRAPH_INTR_ERROR) {
nouveau_pgraph_intr_error(dev, nsource);
status &= ~NV_PGRAPH_INTR_ERROR;
nv_wr32(dev, NV03_PGRAPH_INTR, NV_PGRAPH_INTR_ERROR);
}
if (status & NV_PGRAPH_INTR_CONTEXT_SWITCH) {
nouveau_pgraph_intr_context_switch(dev);
status &= ~NV_PGRAPH_INTR_CONTEXT_SWITCH;
nv_wr32(dev, NV03_PGRAPH_INTR,
NV_PGRAPH_INTR_CONTEXT_SWITCH);
}
if (status) {
NV_INFO(dev, "Unhandled PGRAPH_INTR - 0x%08x\n", status);
nv_wr32(dev, NV03_PGRAPH_INTR, status);
}
if ((nv_rd32(dev, NV04_PGRAPH_FIFO) & (1 << 0)) == 0)
nv_wr32(dev, NV04_PGRAPH_FIFO, 1);
}
nv_wr32(dev, NV03_PMC_INTR_0, NV_PMC_INTR_0_PGRAPH_PENDING);
}
static void
nv50_pfb_vm_trap(struct drm_device *dev, int display, const char *name)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
uint32_t trap[6];
int i, ch;
uint32_t idx = nv_rd32(dev, 0x100c90);
if (idx & 0x80000000) {
idx &= 0xffffff;
if (display) {
for (i = 0; i < 6; i++) {
nv_wr32(dev, 0x100c90, idx | i << 24);
trap[i] = nv_rd32(dev, 0x100c94);
}
for (ch = 0; ch < dev_priv->engine.fifo.channels; ch++) {
struct nouveau_channel *chan = dev_priv->fifos[ch];
if (!chan || !chan->ramin)
continue;
if (trap[1] == chan->ramin->instance >> 12)
break;
}
NV_INFO(dev, "%s - VM: Trapped %s at %02x%04x%04x status %08x %08x channel %d\n",
name, (trap[5]&0x100?"read":"write"),
trap[5]&0xff, trap[4]&0xffff,
trap[3]&0xffff, trap[0], trap[2], ch);
}
nv_wr32(dev, 0x100c90, idx | 0x80000000);
} else if (display) {
NV_INFO(dev, "%s - no VM fault?\n", name);
}
}
static struct nouveau_enum_names nv50_mp_exec_error_names[] =
{
{ 3, "STACK_UNDERFLOW" },
{ 4, "QUADON_ACTIVE" },
{ 8, "TIMEOUT" },
{ 0x10, "INVALID_OPCODE" },
{ 0x40, "BREAKPOINT" },
};
static void
nv50_pgraph_mp_trap(struct drm_device *dev, int tpid, int display)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
uint32_t units = nv_rd32(dev, 0x1540);
uint32_t addr, mp10, status, pc, oplow, ophigh;
int i;
int mps = 0;
for (i = 0; i < 4; i++) {
if (!(units & 1 << (i+24)))
continue;
if (dev_priv->chipset < 0xa0)
addr = 0x408200 + (tpid << 12) + (i << 7);
else
addr = 0x408100 + (tpid << 11) + (i << 7);
mp10 = nv_rd32(dev, addr + 0x10);
status = nv_rd32(dev, addr + 0x14);
if (!status)
continue;
if (display) {
nv_rd32(dev, addr + 0x20);
pc = nv_rd32(dev, addr + 0x24);
oplow = nv_rd32(dev, addr + 0x70);
ophigh= nv_rd32(dev, addr + 0x74);
NV_INFO(dev, "PGRAPH_TRAP_MP_EXEC - "
"TP %d MP %d: ", tpid, i);
nouveau_print_enum_names(status,
nv50_mp_exec_error_names);
printk(" at %06x warp %d, opcode %08x %08x\n",
pc&0xffffff, pc >> 24,
oplow, ophigh);
}
nv_wr32(dev, addr + 0x10, mp10);
nv_wr32(dev, addr + 0x14, 0);
mps++;
}
if (!mps && display)
NV_INFO(dev, "PGRAPH_TRAP_MP_EXEC - TP %d: "
"No MPs claiming errors?\n", tpid);
}
static void
nv50_pgraph_tp_trap(struct drm_device *dev, int type, uint32_t ustatus_old,
uint32_t ustatus_new, int display, const char *name)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
int tps = 0;
uint32_t units = nv_rd32(dev, 0x1540);
int i, r;
uint32_t ustatus_addr, ustatus;
for (i = 0; i < 16; i++) {
if (!(units & (1 << i)))
continue;
if (dev_priv->chipset < 0xa0)
ustatus_addr = ustatus_old + (i << 12);
else
ustatus_addr = ustatus_new + (i << 11);
ustatus = nv_rd32(dev, ustatus_addr) & 0x7fffffff;
if (!ustatus)
continue;
tps++;
switch (type) {
case 6: /* texture error... unknown for now */
nv50_pfb_vm_trap(dev, display, name);
if (display) {
NV_ERROR(dev, "magic set %d:\n", i);
for (r = ustatus_addr + 4; r <= ustatus_addr + 0x10; r += 4)
NV_ERROR(dev, "\t0x%08x: 0x%08x\n", r,
nv_rd32(dev, r));
}
break;
case 7: /* MP error */
if (ustatus & 0x00010000) {
nv50_pgraph_mp_trap(dev, i, display);
ustatus &= ~0x00010000;
}
break;
case 8: /* TPDMA error */
{
uint32_t e0c = nv_rd32(dev, ustatus_addr + 4);
uint32_t e10 = nv_rd32(dev, ustatus_addr + 8);
uint32_t e14 = nv_rd32(dev, ustatus_addr + 0xc);
uint32_t e18 = nv_rd32(dev, ustatus_addr + 0x10);
uint32_t e1c = nv_rd32(dev, ustatus_addr + 0x14);
uint32_t e20 = nv_rd32(dev, ustatus_addr + 0x18);
uint32_t e24 = nv_rd32(dev, ustatus_addr + 0x1c);
nv50_pfb_vm_trap(dev, display, name);
/* 2d engine destination */
if (ustatus & 0x00000010) {
if (display) {
NV_INFO(dev, "PGRAPH_TRAP_TPDMA_2D - TP %d - Unknown fault at address %02x%08x\n",
i, e14, e10);
NV_INFO(dev, "PGRAPH_TRAP_TPDMA_2D - TP %d - e0c: %08x, e18: %08x, e1c: %08x, e20: %08x, e24: %08x\n",
i, e0c, e18, e1c, e20, e24);
}
ustatus &= ~0x00000010;
}
/* Render target */
if (ustatus & 0x00000040) {
if (display) {
NV_INFO(dev, "PGRAPH_TRAP_TPDMA_RT - TP %d - Unknown fault at address %02x%08x\n",
i, e14, e10);
NV_INFO(dev, "PGRAPH_TRAP_TPDMA_RT - TP %d - e0c: %08x, e18: %08x, e1c: %08x, e20: %08x, e24: %08x\n",
i, e0c, e18, e1c, e20, e24);
}
ustatus &= ~0x00000040;
}
/* CUDA memory: l[], g[] or stack. */
if (ustatus & 0x00000080) {
if (display) {
if (e18 & 0x80000000) {
/* g[] read fault? */
NV_INFO(dev, "PGRAPH_TRAP_TPDMA - TP %d - Global read fault at address %02x%08x\n",
i, e14, e10 | ((e18 >> 24) & 0x1f));
e18 &= ~0x1f000000;
} else if (e18 & 0xc) {
/* g[] write fault? */
NV_INFO(dev, "PGRAPH_TRAP_TPDMA - TP %d - Global write fault at address %02x%08x\n",
i, e14, e10 | ((e18 >> 7) & 0x1f));
e18 &= ~0x00000f80;
} else {
NV_INFO(dev, "PGRAPH_TRAP_TPDMA - TP %d - Unknown CUDA fault at address %02x%08x\n",
i, e14, e10);
}
NV_INFO(dev, "PGRAPH_TRAP_TPDMA - TP %d - e0c: %08x, e18: %08x, e1c: %08x, e20: %08x, e24: %08x\n",
i, e0c, e18, e1c, e20, e24);
}
ustatus &= ~0x00000080;
}
}
break;
}
if (ustatus) {
if (display)
NV_INFO(dev, "%s - TP%d: Unhandled ustatus 0x%08x\n", name, i, ustatus);
}
nv_wr32(dev, ustatus_addr, 0xc0000000);
}
if (!tps && display)
NV_INFO(dev, "%s - No TPs claiming errors?\n", name);
}
static void
nv50_pgraph_trap_handler(struct drm_device *dev)
{
struct nouveau_pgraph_trap trap;
uint32_t status = nv_rd32(dev, 0x400108);
uint32_t ustatus;
int display = nouveau_ratelimit();
if (!status && display) {
nouveau_graph_trap_info(dev, &trap);
nouveau_graph_dump_trap_info(dev, "PGRAPH_TRAP", &trap);
NV_INFO(dev, "PGRAPH_TRAP - no units reporting traps?\n");
}
/* DISPATCH: Relays commands to other units and handles NOTIFY,
* COND, QUERY. If you get a trap from it, the command is still stuck
* in DISPATCH and you need to do something about it. */
if (status & 0x001) {
ustatus = nv_rd32(dev, 0x400804) & 0x7fffffff;
if (!ustatus && display) {
NV_INFO(dev, "PGRAPH_TRAP_DISPATCH - no ustatus?\n");
}
/* Known to be triggered by screwed up NOTIFY and COND... */
if (ustatus & 0x00000001) {
nv50_pfb_vm_trap(dev, display, "PGRAPH_TRAP_DISPATCH_FAULT");
nv_wr32(dev, 0x400500, 0);
if (nv_rd32(dev, 0x400808) & 0x80000000) {
if (display) {
if (nouveau_graph_trapped_channel(dev, &trap.channel))
trap.channel = -1;
trap.class = nv_rd32(dev, 0x400814);
trap.mthd = nv_rd32(dev, 0x400808) & 0x1ffc;
trap.subc = (nv_rd32(dev, 0x400808) >> 16) & 0x7;
trap.data = nv_rd32(dev, 0x40080c);
trap.data2 = nv_rd32(dev, 0x400810);
nouveau_graph_dump_trap_info(dev,
"PGRAPH_TRAP_DISPATCH_FAULT", &trap);
NV_INFO(dev, "PGRAPH_TRAP_DISPATCH_FAULT - 400808: %08x\n", nv_rd32(dev, 0x400808));
NV_INFO(dev, "PGRAPH_TRAP_DISPATCH_FAULT - 400848: %08x\n", nv_rd32(dev, 0x400848));
}
nv_wr32(dev, 0x400808, 0);
} else if (display) {
NV_INFO(dev, "PGRAPH_TRAP_DISPATCH_FAULT - No stuck command?\n");
}
nv_wr32(dev, 0x4008e8, nv_rd32(dev, 0x4008e8) & 3);
nv_wr32(dev, 0x400848, 0);
ustatus &= ~0x00000001;
}
if (ustatus & 0x00000002) {
nv50_pfb_vm_trap(dev, display, "PGRAPH_TRAP_DISPATCH_QUERY");
nv_wr32(dev, 0x400500, 0);
if (nv_rd32(dev, 0x40084c) & 0x80000000) {
if (display) {
if (nouveau_graph_trapped_channel(dev, &trap.channel))
trap.channel = -1;
trap.class = nv_rd32(dev, 0x400814);
trap.mthd = nv_rd32(dev, 0x40084c) & 0x1ffc;
trap.subc = (nv_rd32(dev, 0x40084c) >> 16) & 0x7;
trap.data = nv_rd32(dev, 0x40085c);
trap.data2 = 0;
nouveau_graph_dump_trap_info(dev,
"PGRAPH_TRAP_DISPATCH_QUERY", &trap);
NV_INFO(dev, "PGRAPH_TRAP_DISPATCH_QUERY - 40084c: %08x\n", nv_rd32(dev, 0x40084c));
}
nv_wr32(dev, 0x40084c, 0);
} else if (display) {
NV_INFO(dev, "PGRAPH_TRAP_DISPATCH_QUERY - No stuck command?\n");
}
ustatus &= ~0x00000002;
}
if (ustatus && display)
NV_INFO(dev, "PGRAPH_TRAP_DISPATCH - Unhandled ustatus 0x%08x\n", ustatus);
nv_wr32(dev, 0x400804, 0xc0000000);
nv_wr32(dev, 0x400108, 0x001);
status &= ~0x001;
}
/* TRAPs other than dispatch use the "normal" trap regs. */
if (status && display) {
nouveau_graph_trap_info(dev, &trap);
nouveau_graph_dump_trap_info(dev,
"PGRAPH_TRAP", &trap);
}
/* M2MF: Memory to memory copy engine. */
if (status & 0x002) {
ustatus = nv_rd32(dev, 0x406800) & 0x7fffffff;
if (!ustatus && display) {
NV_INFO(dev, "PGRAPH_TRAP_M2MF - no ustatus?\n");
}
if (ustatus & 0x00000001) {
nv50_pfb_vm_trap(dev, display, "PGRAPH_TRAP_M2MF_NOTIFY");
ustatus &= ~0x00000001;
}
if (ustatus & 0x00000002) {
nv50_pfb_vm_trap(dev, display, "PGRAPH_TRAP_M2MF_IN");
ustatus &= ~0x00000002;
}
if (ustatus & 0x00000004) {
nv50_pfb_vm_trap(dev, display, "PGRAPH_TRAP_M2MF_OUT");
ustatus &= ~0x00000004;
}
NV_INFO (dev, "PGRAPH_TRAP_M2MF - %08x %08x %08x %08x\n",
nv_rd32(dev, 0x406804),
nv_rd32(dev, 0x406808),
nv_rd32(dev, 0x40680c),
nv_rd32(dev, 0x406810));
if (ustatus && display)
NV_INFO(dev, "PGRAPH_TRAP_M2MF - Unhandled ustatus 0x%08x\n", ustatus);
/* No sane way found yet -- just reset the bugger. */
nv_wr32(dev, 0x400040, 2);
nv_wr32(dev, 0x400040, 0);
nv_wr32(dev, 0x406800, 0xc0000000);
nv_wr32(dev, 0x400108, 0x002);
status &= ~0x002;
}
/* VFETCH: Fetches data from vertex buffers. */
if (status & 0x004) {
ustatus = nv_rd32(dev, 0x400c04) & 0x7fffffff;
if (!ustatus && display) {
NV_INFO(dev, "PGRAPH_TRAP_VFETCH - no ustatus?\n");
}
if (ustatus & 0x00000001) {
nv50_pfb_vm_trap(dev, display, "PGRAPH_TRAP_VFETCH_FAULT");
NV_INFO (dev, "PGRAPH_TRAP_VFETCH_FAULT - %08x %08x %08x %08x\n",
nv_rd32(dev, 0x400c00),
nv_rd32(dev, 0x400c08),
nv_rd32(dev, 0x400c0c),
nv_rd32(dev, 0x400c10));
ustatus &= ~0x00000001;
}
if (ustatus && display)
NV_INFO(dev, "PGRAPH_TRAP_VFETCH - Unhandled ustatus 0x%08x\n", ustatus);
nv_wr32(dev, 0x400c04, 0xc0000000);
nv_wr32(dev, 0x400108, 0x004);
status &= ~0x004;
}
/* STRMOUT: DirectX streamout / OpenGL transform feedback. */
if (status & 0x008) {
ustatus = nv_rd32(dev, 0x401800) & 0x7fffffff;
if (!ustatus && display) {
NV_INFO(dev, "PGRAPH_TRAP_STRMOUT - no ustatus?\n");
}
if (ustatus & 0x00000001) {
nv50_pfb_vm_trap(dev, display, "PGRAPH_TRAP_STRMOUT_FAULT");
NV_INFO (dev, "PGRAPH_TRAP_STRMOUT_FAULT - %08x %08x %08x %08x\n",
nv_rd32(dev, 0x401804),
nv_rd32(dev, 0x401808),
nv_rd32(dev, 0x40180c),
nv_rd32(dev, 0x401810));
ustatus &= ~0x00000001;
}
if (ustatus && display)
NV_INFO(dev, "PGRAPH_TRAP_STRMOUT - Unhandled ustatus 0x%08x\n", ustatus);
/* No sane way found yet -- just reset the bugger. */
nv_wr32(dev, 0x400040, 0x80);
nv_wr32(dev, 0x400040, 0);
nv_wr32(dev, 0x401800, 0xc0000000);
nv_wr32(dev, 0x400108, 0x008);
status &= ~0x008;
}
/* CCACHE: Handles code and c[] caches and fills them. */
if (status & 0x010) {
ustatus = nv_rd32(dev, 0x405018) & 0x7fffffff;
if (!ustatus && display) {
NV_INFO(dev, "PGRAPH_TRAP_CCACHE - no ustatus?\n");
}
if (ustatus & 0x00000001) {
nv50_pfb_vm_trap(dev, display, "PGRAPH_TRAP_CCACHE_FAULT");
NV_INFO (dev, "PGRAPH_TRAP_CCACHE_FAULT - %08x %08x %08x %08x %08x %08x %08x\n",
nv_rd32(dev, 0x405800),
nv_rd32(dev, 0x405804),
nv_rd32(dev, 0x405808),
nv_rd32(dev, 0x40580c),
nv_rd32(dev, 0x405810),
nv_rd32(dev, 0x405814),
nv_rd32(dev, 0x40581c));
ustatus &= ~0x00000001;
}
if (ustatus && display)
NV_INFO(dev, "PGRAPH_TRAP_CCACHE - Unhandled ustatus 0x%08x\n", ustatus);
nv_wr32(dev, 0x405018, 0xc0000000);
nv_wr32(dev, 0x400108, 0x010);
status &= ~0x010;
}
/* Unknown, not seen yet... 0x402000 is the only trap status reg
* remaining, so try to handle it anyway. Perhaps related to that
* unknown DMA slot on tesla? */
if (status & 0x20) {
nv50_pfb_vm_trap(dev, display, "PGRAPH_TRAP_UNKC04");
ustatus = nv_rd32(dev, 0x402000) & 0x7fffffff;
if (display)
NV_INFO(dev, "PGRAPH_TRAP_UNKC04 - Unhandled ustatus 0x%08x\n", ustatus);
nv_wr32(dev, 0x402000, 0xc0000000);
/* no status modifiction on purpose */
}
/* TEXTURE: CUDA texturing units */
if (status & 0x040) {
nv50_pgraph_tp_trap (dev, 6, 0x408900, 0x408600, display,
"PGRAPH_TRAP_TEXTURE");
nv_wr32(dev, 0x400108, 0x040);
status &= ~0x040;
}
/* MP: CUDA execution engines. */
if (status & 0x080) {
nv50_pgraph_tp_trap (dev, 7, 0x408314, 0x40831c, display,
"PGRAPH_TRAP_MP");
nv_wr32(dev, 0x400108, 0x080);
status &= ~0x080;
}
/* TPDMA: Handles TP-initiated uncached memory accesses:
* l[], g[], stack, 2d surfaces, render targets. */
if (status & 0x100) {
nv50_pgraph_tp_trap (dev, 8, 0x408e08, 0x408708, display,
"PGRAPH_TRAP_TPDMA");
nv_wr32(dev, 0x400108, 0x100);
status &= ~0x100;
}
if (status) {
if (display)
NV_INFO(dev, "PGRAPH_TRAP - Unknown trap 0x%08x\n",
status);
nv_wr32(dev, 0x400108, status);
}
}
/* There must be a *lot* of these. Will take some time to gather them up. */
static struct nouveau_enum_names nv50_data_error_names[] =
{
{ 4, "INVALID_VALUE" },
{ 5, "INVALID_ENUM" },
{ 8, "INVALID_OBJECT" },
{ 0xc, "INVALID_BITFIELD" },
{ 0x28, "MP_NO_REG_SPACE" },
{ 0x2b, "MP_BLOCK_SIZE_MISMATCH" },
};
static void
nv50_pgraph_irq_handler(struct drm_device *dev)
{
struct nouveau_pgraph_trap trap;
int unhandled = 0;
uint32_t status;
while ((status = nv_rd32(dev, NV03_PGRAPH_INTR))) {
/* NOTIFY: You've set a NOTIFY an a command and it's done. */
if (status & 0x00000001) {
nouveau_graph_trap_info(dev, &trap);
if (nouveau_ratelimit())
nouveau_graph_dump_trap_info(dev,
"PGRAPH_NOTIFY", &trap);
status &= ~0x00000001;
nv_wr32(dev, NV03_PGRAPH_INTR, 0x00000001);
}
/* COMPUTE_QUERY: Purpose and exact cause unknown, happens
* when you write 0x200 to 0x50c0 method 0x31c. */
if (status & 0x00000002) {
nouveau_graph_trap_info(dev, &trap);
if (nouveau_ratelimit())
nouveau_graph_dump_trap_info(dev,
"PGRAPH_COMPUTE_QUERY", &trap);
status &= ~0x00000002;
nv_wr32(dev, NV03_PGRAPH_INTR, 0x00000002);
}
/* Unknown, never seen: 0x4 */
/* ILLEGAL_MTHD: You used a wrong method for this class. */
if (status & 0x00000010) {
nouveau_graph_trap_info(dev, &trap);
if (nouveau_pgraph_intr_swmthd(dev, &trap))
unhandled = 1;
if (unhandled && nouveau_ratelimit())
nouveau_graph_dump_trap_info(dev,
"PGRAPH_ILLEGAL_MTHD", &trap);
status &= ~0x00000010;
nv_wr32(dev, NV03_PGRAPH_INTR, 0x00000010);
}
/* ILLEGAL_CLASS: You used a wrong class. */
if (status & 0x00000020) {
nouveau_graph_trap_info(dev, &trap);
if (nouveau_ratelimit())
nouveau_graph_dump_trap_info(dev,
"PGRAPH_ILLEGAL_CLASS", &trap);
status &= ~0x00000020;
nv_wr32(dev, NV03_PGRAPH_INTR, 0x00000020);
}
/* DOUBLE_NOTIFY: You tried to set a NOTIFY on another NOTIFY. */
if (status & 0x00000040) {
nouveau_graph_trap_info(dev, &trap);
if (nouveau_ratelimit())
nouveau_graph_dump_trap_info(dev,
"PGRAPH_DOUBLE_NOTIFY", &trap);
status &= ~0x00000040;
nv_wr32(dev, NV03_PGRAPH_INTR, 0x00000040);
}
/* CONTEXT_SWITCH: PGRAPH needs us to load a new context */
if (status & 0x00001000) {
nv_wr32(dev, 0x400500, 0x00000000);
nv_wr32(dev, NV03_PGRAPH_INTR,
NV_PGRAPH_INTR_CONTEXT_SWITCH);
nv_wr32(dev, NV40_PGRAPH_INTR_EN, nv_rd32(dev,
NV40_PGRAPH_INTR_EN) &
~NV_PGRAPH_INTR_CONTEXT_SWITCH);
nv_wr32(dev, 0x400500, 0x00010001);
nv50_graph_context_switch(dev);
status &= ~NV_PGRAPH_INTR_CONTEXT_SWITCH;
}
/* BUFFER_NOTIFY: Your m2mf transfer finished */
if (status & 0x00010000) {
nouveau_graph_trap_info(dev, &trap);
if (nouveau_ratelimit())
nouveau_graph_dump_trap_info(dev,
"PGRAPH_BUFFER_NOTIFY", &trap);
status &= ~0x00010000;
nv_wr32(dev, NV03_PGRAPH_INTR, 0x00010000);
}
/* DATA_ERROR: Invalid value for this method, or invalid
* state in current PGRAPH context for this operation */
if (status & 0x00100000) {
nouveau_graph_trap_info(dev, &trap);
if (nouveau_ratelimit()) {
nouveau_graph_dump_trap_info(dev,
"PGRAPH_DATA_ERROR", &trap);
NV_INFO (dev, "PGRAPH_DATA_ERROR - ");
nouveau_print_enum_names(nv_rd32(dev, 0x400110),
nv50_data_error_names);
printk("\n");
}
status &= ~0x00100000;
nv_wr32(dev, NV03_PGRAPH_INTR, 0x00100000);
}
/* TRAP: Something bad happened in the middle of command
* execution. Has a billion types, subtypes, and even
* subsubtypes. */
if (status & 0x00200000) {
nv50_pgraph_trap_handler(dev);
status &= ~0x00200000;
nv_wr32(dev, NV03_PGRAPH_INTR, 0x00200000);
}
/* Unknown, never seen: 0x00400000 */
/* SINGLE_STEP: Happens on every method if you turned on
* single stepping in 40008c */
if (status & 0x01000000) {
nouveau_graph_trap_info(dev, &trap);
if (nouveau_ratelimit())
nouveau_graph_dump_trap_info(dev,
"PGRAPH_SINGLE_STEP", &trap);
status &= ~0x01000000;
nv_wr32(dev, NV03_PGRAPH_INTR, 0x01000000);
}
/* 0x02000000 happens when you pause a ctxprog...
* but the only way this can happen that I know is by
* poking the relevant MMIO register, and we don't
* do that. */
if (status) {
NV_INFO(dev, "Unhandled PGRAPH_INTR - 0x%08x\n",
status);
nv_wr32(dev, NV03_PGRAPH_INTR, status);
}
{
const int isb = (1 << 16) | (1 << 0);
if ((nv_rd32(dev, 0x400500) & isb) != isb)
nv_wr32(dev, 0x400500,
nv_rd32(dev, 0x400500) | isb);
}
}
nv_wr32(dev, NV03_PMC_INTR_0, NV_PMC_INTR_0_PGRAPH_PENDING);
if (nv_rd32(dev, 0x400824) & (1 << 31))
nv_wr32(dev, 0x400824, nv_rd32(dev, 0x400824) & ~(1 << 31));
}
static void
nouveau_crtc_irq_handler(struct drm_device *dev, int crtc)
{
if (crtc & 1)
nv_wr32(dev, NV_CRTC0_INTSTAT, NV_CRTC_INTR_VBLANK);
if (crtc & 2)
nv_wr32(dev, NV_CRTC1_INTSTAT, NV_CRTC_INTR_VBLANK);
}
irqreturn_t
nouveau_irq_handler(DRM_IRQ_ARGS)
{
struct drm_device *dev = (struct drm_device *)arg;
struct drm_nouveau_private *dev_priv = dev->dev_private;
uint32_t status;
unsigned long flags;
status = nv_rd32(dev, NV03_PMC_INTR_0);
if (!status)
return IRQ_NONE;
spin_lock_irqsave(&dev_priv->context_switch_lock, flags);
if (status & NV_PMC_INTR_0_PFIFO_PENDING) {
nouveau_fifo_irq_handler(dev);
status &= ~NV_PMC_INTR_0_PFIFO_PENDING;
}
if (status & NV_PMC_INTR_0_PGRAPH_PENDING) {
if (dev_priv->card_type >= NV_50)
nv50_pgraph_irq_handler(dev);
else
nouveau_pgraph_irq_handler(dev);
status &= ~NV_PMC_INTR_0_PGRAPH_PENDING;
}
if (status & NV_PMC_INTR_0_CRTCn_PENDING) {
nouveau_crtc_irq_handler(dev, (status>>24)&3);
status &= ~NV_PMC_INTR_0_CRTCn_PENDING;
}
if (status & (NV_PMC_INTR_0_NV50_DISPLAY_PENDING |
NV_PMC_INTR_0_NV50_I2C_PENDING)) {
nv50_display_irq_handler(dev);
status &= ~(NV_PMC_INTR_0_NV50_DISPLAY_PENDING |
NV_PMC_INTR_0_NV50_I2C_PENDING);
}
if (status)
NV_ERROR(dev, "Unhandled PMC INTR status bits 0x%08x\n", status);
spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags);
return IRQ_HANDLED;
}
