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/*
* Copyright 2017 Red Hat Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* Authors: Jérôme Glisse <jglisse@redhat.com>
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/cdev.h>
#include <linux/slab.h>
#include <linux/fs.h>
#include <uapi/drm/compote-uapi.h>
#include "compote.h"
#include <nvif/driver.h>
#include <nvif/class.h>
#include <nvif/clb069.h>
#include "nouveau_ttm.h"
#include "nouveau_usif.h"
#include "nouveau_abi16.h"
struct compote_pfault {
uint64_t inst;
uint64_t addr;
uint64_t time;
uint32_t rsvd;
uint32_t info;
};
static inline uint32_t compote_pfault_valid(const struct compote_pfault *pfault)
{
return (pfault->info & 0x80000000) >> 31;
}
static inline uint32_t compote_pfault_gpc(const struct compote_pfault *pfault)
{
return (pfault->info & 0x1f000000) >> 24;
}
static inline uint32_t compote_pfault_isgpc(const struct compote_pfault *pfault)
{
return (pfault->info & 0x00100000) >> 20;
}
static inline uint32_t compote_pfault_access(const struct compote_pfault *pfault)
{
return (pfault->info & 0x00070000) >> 16;
}
static inline uint32_t compote_pfault_client(const struct compote_pfault *pfault)
{
return (pfault->info & 0x00007f00) >> 8;
}
static inline uint32_t compote_pfault_fault(const struct compote_pfault *pfault)
{
return (pfault->info & 0x0000001f) >> 0;
}
static inline void compote_file_pfault_read(struct compote_file *cfile,
struct compote_pfault *pfault,
uint32_t index)
{
index *= 32;
pfault->inst = nvif_rd32(&cfile->nvpfault_buffer, index + 0x00);
pfault->inst |= ((uint64_t)nvif_rd32(&cfile->nvpfault_buffer, index + 0x04)) << 32;
pfault->addr = nvif_rd32(&cfile->nvpfault_buffer, index + 0x08);
pfault->addr |= ((uint64_t)nvif_rd32(&cfile->nvpfault_buffer, index + 0x0c)) << 32;
pfault->time = nvif_rd32(&cfile->nvpfault_buffer, index + 0x10);
pfault->time |= ((uint64_t)nvif_rd32(&cfile->nvpfault_buffer, index + 0x14)) << 32;
pfault->rsvd = nvif_rd32(&cfile->nvpfault_buffer, index + 0x18);
pfault->info = nvif_rd32(&cfile->nvpfault_buffer, index + 0x1c);
}
static int compote_pfault_handler(struct compote_file *cfile,
const struct compote_pfault *pfault)
{
return -EINVAL;
}
static int compote_file_pfault_process(struct nvif_notify *notify)
{
struct compote_file *cfile;
struct nvif_device *device;
uint32_t get, put;
cfile = container_of(notify, struct compote_file, nvpfault_notifier);
device = &cfile->nvclient.device;
get = nvif_rd32(&device->object, 0x002a7c);
put = nvif_rd32(&device->object, 0x002a80);
for (; get != put; get++) {
struct compote_pfault pfault;
int ret;
compote_file_pfault_read(cfile, &pfault, get);
nvif_wr32(&device->object, 0x002a7c, get + 1);
if (!compote_pfault_valid(&pfault))
continue;
nvif_mask(&cfile->nvpfault_buffer, 0x1c, 0x80000000, 0x00000000);
ret = compote_pfault_handler(cfile, &pfault);
if (ret) {
/* Kill threads */
nvif_wr32(&device->object, 0x100cbc, 0x80000000 | (4 << 3) |
(compote_pfault_client(&pfault) << 9) |
(compote_pfault_gpc(&pfault) << 15) |
(compote_pfault_isgpc(&pfault) << 20));
} else {
/* Resume threads */
nvif_wr32(&device->object, 0x100cbc, 0x80000000 | (1 << 3) |
(compote_pfault_client(&pfault) << 9) |
(compote_pfault_gpc(&pfault) << 15) |
(compote_pfault_isgpc(&pfault) << 20));
}
}
return NVIF_NOTIFY_KEEP;
}
int compote_file_pfault_init(struct compote_file *cfile)
{
struct nvif_device *device = &cfile->nvclient.device;
int ret;
/* Allocate replayable fault buffer. */
ret = nvif_object_init(&device->object, 0, MAXWELL_FAULT_BUFFER_A,
NULL, 0, &cfile->nvpfault_buffer);
if (ret)
return ret;
nvif_object_map(&cfile->nvpfault_buffer);
/* Request notification of pending replayable faults. */
ret = nvif_notify_init(&cfile->nvpfault_buffer,
compote_file_pfault_process,
true, NVB069_VN_NTFY_FAULT,
NULL, 0, 0,
&cfile->nvpfault_notifier);
if (ret)
goto error;
ret = nvif_notify_get(&cfile->nvpfault_notifier);
if (ret)
goto error_get;
return 0;
error_get:
nvif_notify_fini(&cfile->nvpfault_notifier);
error:
nvif_object_fini(&cfile->nvpfault_buffer);
return ret;
}
void compote_file_pfault_fini(struct compote_file *cfile)
{
nvif_notify_put(&cfile->nvpfault_notifier);
nvif_notify_fini(&cfile->nvpfault_notifier);
nvif_object_fini(&cfile->nvpfault_buffer);
}
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