1 files changed, 400 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_chan.c b/drivers/gpu/drm/nouveau/nouveau_chan.c
new file mode 100644
index 000000000000..c1d7301c0e9c
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_chan.c
@@ -0,0 +1,400 @@
+/*
+ * 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);
+		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 (chan != chan->drm->cechan) {
+		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;
+}