drm/nouveau: Add DRM driver for NVIDIA GPUs

This adds a drm/kms staging non-API stable driver for GPUs from NVIDIA.

This driver is a KMS-based driver and requires a compatible nouveau
userspace libdrm and nouveau X.org driver.

This driver requires firmware files not available in this kernel tree,
interested parties can find them via the nouveau project git archive.

This driver is reverse engineered, and is in no way supported by nVidia.

Support for nearly the complete range of nvidia hw from nv04->g80 (nv50)
is available, and the kms driver should support driving nearly all
output types (displayport is under development still) along with supporting
suspend/resume.

This work is all from the upstream nouveau project found at
nouveau.freedesktop.org.

The original authors list from nouveau git tree is:
Anssi Hannula <anssi.hannula@iki.fi>
Ben Skeggs <bskeggs@redhat.com>
Francisco Jerez <currojerez@riseup.net>
Maarten Maathuis <madman2003@gmail.com>
Marcin Kościelnicki <koriakin@0x04.net>
Matthew Garrett <mjg@redhat.com>
Matt Parnell <mparnell@gmail.com>
Patrice Mandin <patmandin@gmail.com>
Pekka Paalanen <pq@iki.fi>
Xavier Chantry <shiningxc@gmail.com>
along with project founder Stephane Marchesin <marchesin@icps.u-strasbg.fr>

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 314 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nv40_fifo.c b/drivers/gpu/drm/nouveau/nv40_fifo.c
new file mode 100644
index 0000000..b4f19cc
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nv40_fifo.c
@@ -0,0 +1,314 @@
+/*
+ * 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 "nouveau_drv.h"
+#include "nouveau_drm.h"
+
+#define NV40_RAMFC(c) (dev_priv->ramfc_offset + ((c) * NV40_RAMFC__SIZE))
+#define NV40_RAMFC__SIZE 128
+
+int
+nv40_fifo_create_context(struct nouveau_channel *chan)
+{
+	struct drm_device *dev = chan->dev;
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	uint32_t fc = NV40_RAMFC(chan->id);
+	int ret;
+
+	ret = nouveau_gpuobj_new_fake(dev, NV40_RAMFC(chan->id), ~0,
+				      NV40_RAMFC__SIZE, NVOBJ_FLAG_ZERO_ALLOC |
+				      NVOBJ_FLAG_ZERO_FREE, NULL, &chan->ramfc);
+	if (ret)
+		return ret;
+
+	dev_priv->engine.instmem.prepare_access(dev, true);
+	nv_wi32(dev, fc +  0, chan->pushbuf_base);
+	nv_wi32(dev, fc +  4, chan->pushbuf_base);
+	nv_wi32(dev, fc + 12, chan->pushbuf->instance >> 4);
+	nv_wi32(dev, fc + 24, NV_PFIFO_CACHE1_DMA_FETCH_TRIG_128_BYTES |
+			      NV_PFIFO_CACHE1_DMA_FETCH_SIZE_128_BYTES |
+			      NV_PFIFO_CACHE1_DMA_FETCH_MAX_REQS_8 |
+#ifdef __BIG_ENDIAN
+			      NV_PFIFO_CACHE1_BIG_ENDIAN |
+#endif
+			      0x30000000 /* no idea.. */);
+	nv_wi32(dev, fc + 56, chan->ramin_grctx->instance >> 4);
+	nv_wi32(dev, fc + 60, 0x0001FFFF);
+	dev_priv->engine.instmem.finish_access(dev);
+
+	/* enable the fifo dma operation */
+	nv_wr32(dev, NV04_PFIFO_MODE,
+		nv_rd32(dev, NV04_PFIFO_MODE) | (1 << chan->id));
+	return 0;
+}
+
+void
+nv40_fifo_destroy_context(struct nouveau_channel *chan)
+{
+	struct drm_device *dev = chan->dev;
+
+	nv_wr32(dev, NV04_PFIFO_MODE,
+		nv_rd32(dev, NV04_PFIFO_MODE) & ~(1 << chan->id));
+
+	if (chan->ramfc)
+		nouveau_gpuobj_ref_del(dev, &chan->ramfc);
+}
+
+static void
+nv40_fifo_do_load_context(struct drm_device *dev, int chid)
+{
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	uint32_t fc = NV40_RAMFC(chid), tmp, tmp2;
+
+	dev_priv->engine.instmem.prepare_access(dev, false);
+
+	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));
+	nv_wr32(dev, NV10_PFIFO_CACHE1_REF_CNT, nv_ri32(dev, fc + 8));
+	nv_wr32(dev, NV04_PFIFO_CACHE1_DMA_INSTANCE, nv_ri32(dev, fc + 12));
+	nv_wr32(dev, NV04_PFIFO_CACHE1_DMA_DCOUNT, nv_ri32(dev, fc + 16));
+	nv_wr32(dev, NV04_PFIFO_CACHE1_DMA_STATE, nv_ri32(dev, fc + 20));
+
+	/* No idea what 0x2058 is.. */
+	tmp   = nv_ri32(dev, fc + 24);
+	tmp2  = nv_rd32(dev, 0x2058) & 0xFFF;
+	tmp2 |= (tmp & 0x30000000);
+	nv_wr32(dev, 0x2058, tmp2);
+	tmp  &= ~0x30000000;
+	nv_wr32(dev, NV04_PFIFO_CACHE1_DMA_FETCH, tmp);
+
+	nv_wr32(dev, NV04_PFIFO_CACHE1_ENGINE, nv_ri32(dev, fc + 28));
+	nv_wr32(dev, NV04_PFIFO_CACHE1_PULL1, nv_ri32(dev, fc + 32));
+	nv_wr32(dev, NV10_PFIFO_CACHE1_ACQUIRE_VALUE, nv_ri32(dev, fc + 36));
+	tmp = nv_ri32(dev, fc + 40);
+	nv_wr32(dev, NV10_PFIFO_CACHE1_ACQUIRE_TIMESTAMP, tmp);
+	nv_wr32(dev, NV10_PFIFO_CACHE1_ACQUIRE_TIMEOUT, nv_ri32(dev, fc + 44));
+	nv_wr32(dev, NV10_PFIFO_CACHE1_SEMAPHORE, nv_ri32(dev, fc + 48));
+	nv_wr32(dev, NV10_PFIFO_CACHE1_DMA_SUBROUTINE, nv_ri32(dev, fc + 52));
+	nv_wr32(dev, NV40_PFIFO_GRCTX_INSTANCE, nv_ri32(dev, fc + 56));
+
+	/* Don't clobber the TIMEOUT_ENABLED flag when restoring from RAMFC */
+	tmp  = nv_rd32(dev, NV04_PFIFO_DMA_TIMESLICE) & ~0x1FFFF;
+	tmp |= nv_ri32(dev, fc + 60) & 0x1FFFF;
+	nv_wr32(dev, NV04_PFIFO_DMA_TIMESLICE, tmp);
+
+	nv_wr32(dev, 0x32e4, nv_ri32(dev, fc + 64));
+	/* NVIDIA does this next line twice... */
+	nv_wr32(dev, 0x32e8, nv_ri32(dev, fc + 68));
+	nv_wr32(dev, 0x2088, nv_ri32(dev, fc + 76));
+	nv_wr32(dev, 0x3300, nv_ri32(dev, fc + 80));
+
+	dev_priv->engine.instmem.finish_access(dev);
+
+	nv_wr32(dev, NV03_PFIFO_CACHE1_GET, 0);
+	nv_wr32(dev, NV03_PFIFO_CACHE1_PUT, 0);
+}
+
+int
+nv40_fifo_load_context(struct nouveau_channel *chan)
+{
+	struct drm_device *dev = chan->dev;
+	uint32_t tmp;
+
+	nv40_fifo_do_load_context(dev, chan->id);
+
+	/* Set channel active, and in DMA mode */
+	nv_wr32(dev, NV03_PFIFO_CACHE1_PUSH1,
+		     NV40_PFIFO_CACHE1_PUSH1_DMA | chan->id);
+	nv_wr32(dev, NV04_PFIFO_CACHE1_DMA_PUSH, 1);
+
+	/* Reset DMA_CTL_AT_INFO to INVALID */
+	tmp = nv_rd32(dev, NV04_PFIFO_CACHE1_DMA_CTL) & ~(1 << 31);
+	nv_wr32(dev, NV04_PFIFO_CACHE1_DMA_CTL, tmp);
+
+	return 0;
+}
+
+int
+nv40_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;
+	uint32_t fc, tmp;
+	int chid;
+
+	chid = pfifo->channel_id(dev);
+	if (chid < 0 || chid >= dev_priv->engine.fifo.channels)
+		return 0;
+	fc = NV40_RAMFC(chid);
+
+	dev_priv->engine.instmem.prepare_access(dev, true);
+	nv_wi32(dev, fc + 0, nv_rd32(dev, NV04_PFIFO_CACHE1_DMA_PUT));
+	nv_wi32(dev, fc + 4, nv_rd32(dev, NV04_PFIFO_CACHE1_DMA_GET));
+	nv_wi32(dev, fc + 8, nv_rd32(dev, NV10_PFIFO_CACHE1_REF_CNT));
+	nv_wi32(dev, fc + 12, nv_rd32(dev, NV04_PFIFO_CACHE1_DMA_INSTANCE));
+	nv_wi32(dev, fc + 16, nv_rd32(dev, NV04_PFIFO_CACHE1_DMA_DCOUNT));
+	nv_wi32(dev, fc + 20, nv_rd32(dev, NV04_PFIFO_CACHE1_DMA_STATE));
+	tmp  = nv_rd32(dev, NV04_PFIFO_CACHE1_DMA_FETCH);
+	tmp |= nv_rd32(dev, 0x2058) & 0x30000000;
+	nv_wi32(dev, fc + 24, tmp);
+	nv_wi32(dev, fc + 28, nv_rd32(dev, NV04_PFIFO_CACHE1_ENGINE));
+	nv_wi32(dev, fc + 32, nv_rd32(dev, NV04_PFIFO_CACHE1_PULL1));
+	nv_wi32(dev, fc + 36, nv_rd32(dev, NV10_PFIFO_CACHE1_ACQUIRE_VALUE));
+	tmp = nv_rd32(dev, NV10_PFIFO_CACHE1_ACQUIRE_TIMESTAMP);
+	nv_wi32(dev, fc + 40, tmp);
+	nv_wi32(dev, fc + 44, nv_rd32(dev, NV10_PFIFO_CACHE1_ACQUIRE_TIMEOUT));
+	nv_wi32(dev, fc + 48, nv_rd32(dev, NV10_PFIFO_CACHE1_SEMAPHORE));
+	/* NVIDIA read 0x3228 first, then write DMA_GET here.. maybe something
+	 * more involved depending on the value of 0x3228?
+	 */
+	nv_wi32(dev, fc + 52, nv_rd32(dev, NV04_PFIFO_CACHE1_DMA_GET));
+	nv_wi32(dev, fc + 56, nv_rd32(dev, NV40_PFIFO_GRCTX_INSTANCE));
+	nv_wi32(dev, fc + 60, nv_rd32(dev, NV04_PFIFO_DMA_TIMESLICE) & 0x1ffff);
+	/* No idea what the below is for exactly, ripped from a mmio-trace */
+	nv_wi32(dev, fc + 64, nv_rd32(dev, NV40_PFIFO_UNK32E4));
+	/* NVIDIA do this next line twice.. bug? */
+	nv_wi32(dev, fc + 68, nv_rd32(dev, 0x32e8));
+	nv_wi32(dev, fc + 76, nv_rd32(dev, 0x2088));
+	nv_wi32(dev, fc + 80, nv_rd32(dev, 0x3300));
+#if 0 /* no real idea which is PUT/GET in UNK_48.. */
+	tmp  = nv_rd32(dev, NV04_PFIFO_CACHE1_GET);
+	tmp |= (nv_rd32(dev, NV04_PFIFO_CACHE1_PUT) << 16);
+	nv_wi32(dev, fc + 72, tmp);
+#endif
+	dev_priv->engine.instmem.finish_access(dev);
+
+	nv40_fifo_do_load_context(dev, pfifo->channels - 1);
+	nv_wr32(dev, NV03_PFIFO_CACHE1_PUSH1,
+		     NV40_PFIFO_CACHE1_PUSH1_DMA | (pfifo->channels - 1));
+	return 0;
+}
+
+static void
+nv40_fifo_init_reset(struct drm_device *dev)
+{
+	int i;
+
+	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, 0x003210, 0x00000000);
+	nv_wr32(dev, 0x003270, 0x00000000);
+	nv_wr32(dev, 0x003240, 0x00000000);
+	nv_wr32(dev, 0x003244, 0x00000000);
+	nv_wr32(dev, 0x003258, 0x00000000);
+	nv_wr32(dev, 0x002504, 0x00000000);
+	for (i = 0; i < 16; i++)
+		nv_wr32(dev, 0x002510 + (i * 4), 0x00000000);
+	nv_wr32(dev, 0x00250c, 0x0000ffff);
+	nv_wr32(dev, 0x002048, 0x00000000);
+	nv_wr32(dev, 0x003228, 0x00000000);
+	nv_wr32(dev, 0x0032e8, 0x00000000);
+	nv_wr32(dev, 0x002410, 0x00000000);
+	nv_wr32(dev, 0x002420, 0x00000000);
+	nv_wr32(dev, 0x002058, 0x00000001);
+	nv_wr32(dev, 0x00221c, 0x00000000);
+	/* something with 0x2084, read/modify/write, no change */
+	nv_wr32(dev, 0x002040, 0x000000ff);
+	nv_wr32(dev, 0x002500, 0x00000000);
+	nv_wr32(dev, 0x003200, 0x00000000);
+
+	nv_wr32(dev, NV04_PFIFO_DMA_TIMESLICE, 0x2101ffff);
+}
+
+static void
+nv40_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_offset >> 8));
+	nv_wr32(dev, NV03_PFIFO_RAMRO, dev_priv->ramro_offset>>8);
+
+	switch (dev_priv->chipset) {
+	case 0x47:
+	case 0x49:
+	case 0x4b:
+		nv_wr32(dev, 0x2230, 1);
+		break;
+	default:
+		break;
+	}
+
+	switch (dev_priv->chipset) {
+	case 0x40:
+	case 0x41:
+	case 0x42:
+	case 0x43:
+	case 0x45:
+	case 0x47:
+	case 0x48:
+	case 0x49:
+	case 0x4b:
+		nv_wr32(dev, NV40_PFIFO_RAMFC, 0x30002);
+		break;
+	default:
+		nv_wr32(dev, 0x2230, 0);
+		nv_wr32(dev, NV40_PFIFO_RAMFC,
+			((nouveau_mem_fb_amount(dev) - 512 * 1024 +
+			  dev_priv->ramfc_offset) >> 16) | (3 << 16));
+		break;
+	}
+}
+
+static void
+nv40_fifo_init_intr(struct drm_device *dev)
+{
+	nv_wr32(dev, 0x002100, 0xffffffff);
+	nv_wr32(dev, 0x002140, 0xffffffff);
+}
+
+int
+nv40_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;
+
+	nv40_fifo_init_reset(dev);
+	nv40_fifo_init_ramxx(dev);
+
+	nv40_fifo_do_load_context(dev, pfifo->channels - 1);
+	nv_wr32(dev, NV03_PFIFO_CACHE1_PUSH1, pfifo->channels - 1);
+
+	nv40_fifo_init_intr(dev);
+	pfifo->enable(dev);
+	pfifo->reassign(dev, true);
+
+	for (i = 0; i < dev_priv->engine.fifo.channels; i++) {
+		if (dev_priv->fifos[i]) {
+			uint32_t mode = nv_rd32(dev, NV04_PFIFO_MODE);
+			nv_wr32(dev, NV04_PFIFO_MODE, mode | (1 << i));
+		}
+	}
+
+	return 0;
+}