/*
* Copyright 2012 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 <core/object.h>
#include <core/client.h>
#include <core/device.h>
#include <core/class.h>
#include <subdev/fb.h>
#include <subdev/vm.h>
#include <subdev/instmem.h>
#include <engine/software.h>
#include "nouveau_drm.h"
#include "nouveau_dma.h"
#include "nouveau_bo.h"
#include "nouveau_chan.h"
#include "nouveau_fence.h"
#include "nouveau_abi16.h"
MODULE_PARM_DESC(vram_pushbuf, "Create DMA push buffers in VRAM");
static int nouveau_vram_pushbuf;
module_param_named(vram_pushbuf, nouveau_vram_pushbuf, int, 0400);
int
nouveau_channel_idle(struct nouveau_channel *chan)
{
struct nouveau_cli *cli = chan->cli;
struct nouveau_fence *fence = NULL;
int ret;
ret = nouveau_fence_new(chan, &fence);
if (!ret) {
ret = nouveau_fence_wait(fence, false, false);
nouveau_fence_unref(&fence);
}
if (ret)
NV_ERROR(cli, "failed to idle channel 0x%08x\n", chan->handle);
return ret;
}
void
nouveau_channel_del(struct nouveau_channel **pchan)
{
struct nouveau_channel *chan = *pchan;
if (chan) {
struct nouveau_object *client = nv_object(chan->cli);
if (chan->fence) {
nouveau_channel_idle(chan);
nouveau_fence(chan->drm)->context_del(chan);
}
nouveau_object_del(client, NVDRM_DEVICE, chan->handle);
nouveau_object_del(client, NVDRM_DEVICE, chan->push.handle);
nouveau_bo_vma_del(chan->push.buffer, &chan->push.vma);
nouveau_bo_unmap(chan->push.buffer);
if (chan->push.buffer && chan->push.buffer->pin_refcnt)
nouveau_bo_unpin(chan->push.buffer);
nouveau_bo_ref(NULL, &chan->push.buffer);
kfree(chan);
}
*pchan = NULL;
}
static int
nouveau_channel_prep(struct nouveau_drm *drm, struct nouveau_cli *cli,
u32 parent, u32 handle, u32 size,
struct nouveau_channel **pchan)
{
struct nouveau_device *device = nv_device(drm->device);
struct nouveau_instmem *imem = nouveau_instmem(device);
struct nouveau_vmmgr *vmm = nouveau_vmmgr(device);
struct nouveau_fb *pfb = nouveau_fb(device);
struct nouveau_client *client = &cli->base;
struct nv_dma_class args = {};
struct nouveau_channel *chan;
struct nouveau_object *push;
u32 target;
int ret;
chan = *pchan = kzalloc(sizeof(*chan), GFP_KERNEL);
if (!chan)
return -ENOMEM;
chan->cli = cli;
chan->drm = drm;
chan->handle = handle;
/* allocate memory for dma push buffer */
target = TTM_PL_FLAG_TT;
if (nouveau_vram_pushbuf)
target = TTM_PL_FLAG_VRAM;
ret = nouveau_bo_new(drm->dev, size, 0, target, 0, 0, NULL,
&chan->push.buffer);
if (ret == 0) {
ret = nouveau_bo_pin(chan->push.buffer, target);
if (ret == 0)
ret = nouveau_bo_map(chan->push.buffer);
}
if (ret) {
nouveau_channel_del(pchan);
return ret;
}
/* create dma object covering the *entire* memory space that the
* pushbuf lives in, this is because the GEM code requires that
* we be able to call out to other (indirect) push buffers
*/
chan->push.vma.offset = chan->push.buffer->bo.offset;
chan->push.handle = NVDRM_PUSH | (handle & 0xffff);
if (device->card_type >= NV_50) {
ret = nouveau_bo_vma_add(chan->push.buffer, client->vm,
&chan->push.vma);
if (ret) {
nouveau_channel_del(pchan);
return ret;
}
args.flags = NV_DMA_TARGET_VM | NV_DMA_ACCESS_VM;
args.start = 0;
args.limit = client->vm->vmm->limit - 1;
} else
if (chan->push.buffer->bo.mem.mem_type == TTM_PL_VRAM) {
u64 limit = pfb->ram.size - imem->reserved - 1;
if (device->card_type == NV_04) {
/* nv04 vram pushbuf hack, retarget to its location in
* the framebuffer bar rather than direct vram access..
* nfi why this exists, it came from the -nv ddx.
*/
args.flags = NV_DMA_TARGET_PCI | NV_DMA_ACCESS_RDWR;
args.start = pci_resource_start(device->pdev, 1);
args.limit = args.start + limit;
} else {
args.flags = NV_DMA_TARGET_VRAM | NV_DMA_ACCESS_RDWR;
args.start = 0;
args.limit = limit;
}
} else {
if (chan->drm->agp.stat == ENABLED) {
args.flags = NV_DMA_TARGET_AGP | NV_DMA_ACCESS_RDWR;
args.start = chan->drm->agp.base;
args.limit = chan->drm->agp.base +
chan->drm->agp.size - 1;
} else {
args.flags = NV_DMA_TARGET_VM | NV_DMA_ACCESS_RDWR;
args.start = 0;
args.limit = vmm->limit - 1;
}
}
ret = nouveau_object_new(nv_object(chan->cli), parent,
chan->push.handle, 0x0002,
&args, sizeof(args), &push);
if (ret) {
nouveau_channel_del(pchan);
return ret;
}
return 0;
}
static int
nouveau_channel_ind(struct nouveau_drm *drm, struct nouveau_cli *cli,
u32 parent, u32 handle, u32 engine,
struct nouveau_channel **pchan)
{
static const u16 oclasses[] = { NVE0_CHANNEL_IND_CLASS,
NVC0_CHANNEL_IND_CLASS,
NV84_CHANNEL_IND_CLASS,
NV50_CHANNEL_IND_CLASS,
0 };
const u16 *oclass = oclasses;
struct nve0_channel_ind_class args;
struct nouveau_channel *chan;
int ret;
/* allocate dma push buffer */
ret = nouveau_channel_prep(drm, cli, parent, handle, 0x12000, &chan);
*pchan = chan;
if (ret)
return ret;
/* create channel object */
args.pushbuf = chan->push.handle;
args.ioffset = 0x10000 + chan->push.vma.offset;
args.ilength = 0x02000;
args.engine = engine;
do {
ret = nouveau_object_new(nv_object(cli), parent, handle,
*oclass++, &args, sizeof(args),
&chan->object);
if (ret == 0)
return ret;
} while (*oclass);
nouveau_channel_del(pchan);
return ret;
}
static int
nouveau_channel_dma(struct nouveau_drm *drm, struct nouveau_cli *cli,
u32 parent, u32 handle, struct nouveau_channel **pchan)
{
static const u16 oclasses[] = { NV40_CHANNEL_DMA_CLASS,
NV17_CHANNEL_DMA_CLASS,
NV10_CHANNEL_DMA_CLASS,
NV03_CHANNEL_DMA_CLASS,
0 };
const u16 *oclass = oclasses;
struct nv03_channel_dma_class args;
struct nouveau_channel *chan;
int ret;
/* allocate dma push buffer */
ret = nouveau_channel_prep(drm, cli, parent, handle, 0x10000, &chan);
*pchan = chan;
if (ret)
return ret;
/* create channel object */
args.pushbuf = chan->push.handle;
args.offset = chan->push.vma.offset;
do {
ret = nouveau_object_new(nv_object(cli), parent, handle,
*oclass++, &args, sizeof(args),
&chan->object);
if (ret == 0)
return ret;
} while (ret && *oclass);
nouveau_channel_del(pchan);
return ret;
}
static int
nouveau_channel_init(struct nouveau_channel *chan, u32 vram, u32 gart)
{
struct nouveau_client *client = nv_client(chan->cli);
struct nouveau_device *device = nv_device(chan->drm->device);
struct nouveau_instmem *imem = nouveau_instmem(device);
struct nouveau_vmmgr *vmm = nouveau_vmmgr(device);
struct nouveau_fb *pfb = nouveau_fb(device);
struct nouveau_software_chan *swch;
struct nouveau_object *object;
struct nv_dma_class args = {};
int ret, i;
/* allocate dma objects to cover all allowed vram, and gart */
if (device->card_type < NV_C0) {
if (device->card_type >= NV_50) {
args.flags = NV_DMA_TARGET_VM | NV_DMA_ACCESS_VM;
args.start = 0;
args.limit = client->vm->vmm->limit - 1;
} else {
args.flags = NV_DMA_TARGET_VRAM | NV_DMA_ACCESS_RDWR;
args.start = 0;
args.limit = pfb->ram.size - imem->reserved - 1;
}
ret = nouveau_object_new(nv_object(client), chan->handle, vram,
0x003d, &args, sizeof(args), &object);
if (ret)
return ret;
if (device->card_type >= NV_50) {
args.flags = NV_DMA_TARGET_VM | NV_DMA_ACCESS_VM;
args.start = 0;
args.limit = client->vm->vmm->limit - 1;
} else
if (chan->drm->agp.stat == ENABLED) {
args.flags = NV_DMA_TARGET_AGP | NV_DMA_ACCESS_RDWR;
args.start = chan->drm->agp.base;
args.limit = chan->drm->agp.base +
chan->drm->agp.size - 1;
} else {
args.flags = NV_DMA_TARGET_VM | NV_DMA_ACCESS_RDWR;
args.start = 0;
args.limit = vmm->limit - 1;
}
ret = nouveau_object_new(nv_object(client), chan->handle, gart,
0x003d, &args, sizeof(args), &object);
if (ret)
return ret;
chan->vram = vram;
chan->gart = gart;
}
/* initialise dma tracking parameters */
switch (nv_hclass(chan->object) & 0x00ff) {
case 0x006b:
case 0x006e:
chan->user_put = 0x40;
chan->user_get = 0x44;
chan->dma.max = (0x10000 / 4) - 2;
break;
default:
chan->user_put = 0x40;
chan->user_get = 0x44;
chan->user_get_hi = 0x60;
chan->dma.ib_base = 0x10000 / 4;
chan->dma.ib_max = (0x02000 / 8) - 1;
chan->dma.ib_put = 0;
chan->dma.ib_free = chan->dma.ib_max - chan->dma.ib_put;
chan->dma.max = chan->dma.ib_base;
break;
}
chan->dma.put = 0;
chan->dma.cur = chan->dma.put;
chan->dma.free = chan->dma.max - chan->dma.cur;
ret = RING_SPACE(chan, NOUVEAU_DMA_SKIPS);
if (ret)
return ret;
for (i = 0; i < NOUVEAU_DMA_SKIPS; i++)
OUT_RING(chan, 0x00000000);
/* allocate software object class (used for fences on <= nv05, and
* to signal flip completion), bind it to a subchannel.
*/
if ((device->card_type < NV_E0) || gart /* nve0: want_nvsw */) {
ret = nouveau_object_new(nv_object(client), chan->handle,
NvSw, nouveau_abi16_swclass(chan->drm),
NULL, 0, &object);
if (ret)
return ret;
swch = (void *)object->parent;
swch->flip = nouveau_flip_complete;
swch->flip_data = chan;
}
if (device->card_type < NV_C0) {
ret = RING_SPACE(chan, 2);
if (ret)
return ret;
BEGIN_NV04(chan, NvSubSw, 0x0000, 1);
OUT_RING (chan, NvSw);
FIRE_RING (chan);
}
/* initialise synchronisation */
return nouveau_fence(chan->drm)->context_new(chan);
}
int
nouveau_channel_new(struct nouveau_drm *drm, struct nouveau_cli *cli,
u32 parent, u32 handle, u32 arg0, u32 arg1,
struct nouveau_channel **pchan)
{
int ret;
ret = nouveau_channel_ind(drm, cli, parent, handle, arg0, pchan);
if (ret) {
NV_DEBUG(cli, "ib channel create, %d\n", ret);
ret = nouveau_channel_dma(drm, cli, parent, handle, pchan);
if (ret) {
NV_DEBUG(cli, "dma channel create, %d\n", ret);
return ret;
}
}
ret = nouveau_channel_init(*pchan, arg0, arg1);
if (ret) {
NV_ERROR(cli, "channel failed to initialise, %d\n", ret);
nouveau_channel_del(pchan);
return ret;
}
return 0;
}
