initial import of nouveau code from nouveau CVS

1 files changed, 503 insertions, 0 deletions

diff --git a/shared-core/nouveau_mem.c b/shared-core/nouveau_mem.c
new file mode 100644
index 00000000..91fc6046
--- /dev/null
+++ b/shared-core/nouveau_mem.c
@@ -0,0 +1,503 @@
+/*
+ * Copyright (C) The Weather Channel, Inc.  2002.  All Rights Reserved.
+ * Copyright 2005 Stephane Marchesin
+ *
+ * The Weather Channel (TM) funded Tungsten Graphics to develop the
+ * initial release of the Radeon 8500 driver under the XFree86 license.
+ * This notice must be preserved.
+ *
+ * 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 AUTHORS AND/OR THEIR 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:
+ *    Keith Whitwell <keith@tungstengraphics.com>
+ */
+
+
+#include "drmP.h"
+#include "drm.h"
+#include "drm_sarea.h"
+#include "nouveau_drv.h"
+
+static int meminit_ok=0;
+
+static struct mem_block *split_block(struct mem_block *p, uint64_t start, uint64_t size,
+		DRMFILE filp)
+{
+	/* Maybe cut off the start of an existing block */
+	if (start > p->start) {
+		struct mem_block *newblock =
+			drm_alloc(sizeof(*newblock), DRM_MEM_BUFS);
+		if (!newblock)
+			goto out;
+		newblock->start = start;
+		newblock->size = p->size - (start - p->start);
+		newblock->filp = NULL;
+		newblock->next = p->next;
+		newblock->prev = p;
+		p->next->prev = newblock;
+		p->next = newblock;
+		p->size -= newblock->size;
+		p = newblock;
+	}
+
+	/* Maybe cut off the end of an existing block */
+	if (size < p->size) {
+		struct mem_block *newblock =
+			drm_alloc(sizeof(*newblock), DRM_MEM_BUFS);
+		if (!newblock)
+			goto out;
+		newblock->start = start + size;
+		newblock->size = p->size - size;
+		newblock->filp = NULL;
+		newblock->next = p->next;
+		newblock->prev = p;
+		p->next->prev = newblock;
+		p->next = newblock;
+		p->size = size;
+	}
+
+out:
+	/* Our block is in the middle */
+	p->filp = filp;
+	return p;
+}
+
+static struct mem_block *alloc_block(struct mem_block *heap, uint64_t size,
+		int align2, DRMFILE filp)
+{
+	struct mem_block *p;
+	uint64_t mask = (1 << align2) - 1;
+
+	if (!heap)
+		return NULL;
+
+	list_for_each(p, heap) {
+		uint64_t start = (p->start + mask) & ~mask;
+		if (p->filp == 0 && start + size <= p->start + p->size)
+			return split_block(p, start, size, filp);
+	}
+
+	return NULL;
+}
+
+static struct mem_block *find_block(struct mem_block *heap, uint64_t start)
+{
+	struct mem_block *p;
+
+	list_for_each(p, heap)
+		if (p->start == start)
+			return p;
+
+	return NULL;
+}
+
+static void free_block(struct mem_block *p)
+{
+	p->filp = NULL;
+
+	/* Assumes a single contiguous range.  Needs a special filp in
+	 * 'heap' to stop it being subsumed.
+	 */
+	if (p->next->filp == 0) {
+		struct mem_block *q = p->next;
+		p->size += q->size;
+		p->next = q->next;
+		p->next->prev = p;
+		drm_free(q, sizeof(*q), DRM_MEM_BUFS);
+	}
+
+	if (p->prev->filp == 0) {
+		struct mem_block *q = p->prev;
+		q->size += p->size;
+		q->next = p->next;
+		q->next->prev = q;
+		drm_free(p, sizeof(*q), DRM_MEM_BUFS);
+	}
+}
+
+/* Initialize.  How to check for an uninitialized heap?
+ */
+static int init_heap(struct mem_block **heap, uint64_t start, uint64_t size)
+{
+	struct mem_block *blocks = drm_alloc(sizeof(*blocks), DRM_MEM_BUFS);
+
+	if (!blocks)
+		return DRM_ERR(ENOMEM);
+
+	*heap = drm_alloc(sizeof(**heap), DRM_MEM_BUFS);
+	if (!*heap) {
+		drm_free(blocks, sizeof(*blocks), DRM_MEM_BUFS);
+		return DRM_ERR(ENOMEM);
+	}
+
+	blocks->start = start;
+	blocks->size = size;
+	blocks->filp = NULL;
+	blocks->next = blocks->prev = *heap;
+
+	memset(*heap, 0, sizeof(**heap));
+	(*heap)->filp = (DRMFILE) - 1;
+	(*heap)->next = (*heap)->prev = blocks;
+	return 0;
+}
+
+/* 
+ * Free all blocks associated with the releasing filp
+ */
+void nouveau_mem_release(DRMFILE filp, struct mem_block *heap)
+{
+	struct mem_block *p;
+
+	if (!heap || !heap->next)
+		return;
+
+	list_for_each(p, heap) {
+		if (p->filp == filp)
+			p->filp = NULL;
+	}
+
+	/* Assumes a single contiguous range.  Needs a special filp in
+	 * 'heap' to stop it being subsumed.
+	 */
+	list_for_each(p, heap) {
+		while ((p->filp == 0) && (p->next->filp == 0) && (p->next!=heap)) {
+			struct mem_block *q = p->next;
+			p->size += q->size;
+			p->next = q->next;
+			p->next->prev = p;
+			drm_free(q, sizeof(*q), DRM_MEM_DRIVER);
+		}
+	}
+}
+
+/* 
+ * Cleanup everything
+ */
+static void nouveau_mem_takedown(struct mem_block **heap)
+{
+	struct mem_block *p;
+
+	if (!*heap)
+		return;
+
+	for (p = (*heap)->next; p != *heap;) {
+		struct mem_block *q = p;
+		p = p->next;
+		drm_free(q, sizeof(*q), DRM_MEM_DRIVER);
+	}
+
+	drm_free(*heap, sizeof(**heap), DRM_MEM_DRIVER);
+	*heap = NULL;
+}
+
+void nouveau_mem_close(struct drm_device *dev)
+{
+	drm_nouveau_private_t *dev_priv = dev->dev_private;
+	nouveau_mem_takedown(&dev_priv->agp_heap);
+	nouveau_mem_takedown(&dev_priv->fb_heap);
+}
+
+/* returns the amount of FB ram in bytes */
+uint64_t nouveau_mem_fb_amount(struct drm_device *dev)
+{
+	drm_nouveau_private_t *dev_priv=dev->dev_private;
+	switch(dev_priv->card_type)
+	{
+		case NV_03:
+			switch(NV_READ(NV03_BOOT_0)&NV03_BOOT_0_RAM_AMOUNT)
+			{
+				case NV03_BOOT_0_RAM_AMOUNT_8MB:
+				case NV03_BOOT_0_RAM_AMOUNT_8MB_SDRAM:
+					return 8*1024*1024;
+				case NV03_BOOT_0_RAM_AMOUNT_4MB:
+					return 4*1024*1024;
+				case NV03_BOOT_0_RAM_AMOUNT_2MB:
+					return 2*1024*1024;
+			}
+			break;
+		case NV_04:
+		case NV_05:
+			switch(NV_READ(NV03_BOOT_0)&NV03_BOOT_0_RAM_AMOUNT)
+			{
+				case NV04_BOOT_0_RAM_AMOUNT_32MB:
+					return 32*1024*1024;
+				case NV04_BOOT_0_RAM_AMOUNT_16MB:
+					return 16*1024*1024;
+				case NV04_BOOT_0_RAM_AMOUNT_8MB:
+					return 8*1024*1024;
+				case NV04_BOOT_0_RAM_AMOUNT_4MB:
+					return 4*1024*1024;
+			}
+			break;
+		case NV_10:
+		case NV_20:
+		case NV_30:
+		case NV_40:
+		case G_70:
+		default:
+			// XXX won't work on BSD because of pci_read_config_dword
+			if (dev_priv->flags&NV_NFORCE) {
+				uint32_t mem;
+				pci_read_config_dword(dev->pdev, 0x7C, &mem);
+				return (uint64_t)(((mem >> 6) & 31) + 1)*1024*1024;
+			} else if(dev_priv->flags&NV_NFORCE2) {
+				uint32_t mem;
+				pci_read_config_dword(dev->pdev, 0x84, &mem);
+				return (uint64_t)(((mem >> 4) & 127) + 1)*1024*1024;
+			} else {
+				uint64_t mem;
+				mem=(NV_READ(NV04_FIFO_DATA)&NV10_FIFO_DATA_RAM_AMOUNT_MB_MASK) >> NV10_FIFO_DATA_RAM_AMOUNT_MB_SHIFT;
+				return mem*1024*1024;
+			}
+			break;
+	}
+
+	DRM_ERROR("Unable to detect video ram size. Please report your setup to " DRIVER_EMAIL "\n");
+	return 0;
+}
+
+
+
+int nouveau_mem_init(struct drm_device *dev)
+{
+	drm_nouveau_private_t *dev_priv = dev->dev_private;
+
+	/* init AGP */
+	dev_priv->agp_heap=NULL;
+	if (drm_device_is_agp(dev))
+	{
+		int err;
+		drm_agp_info_t info;
+		drm_agp_mode_t mode;
+		drm_agp_buffer_t agp_req;
+		drm_agp_binding_t bind_req;
+
+		err = drm_agp_acquire(dev);
+		if (err) {
+			DRM_ERROR("Unable to acquire AGP: %d\n", err);
+			goto no_agp;
+		}
+
+		err = drm_agp_info(dev, &info);
+		if (err) {
+			DRM_ERROR("Unable to get AGP info: %d\n", err);
+			goto no_agp;
+		}
+
+		/* see agp.h for the AGPSTAT_* modes available */
+		mode.mode = info.mode;
+		err = drm_agp_enable(dev, mode);
+		if (err) {
+			DRM_ERROR("Unable to enable AGP: %d\n", err);
+			goto no_agp;
+		}
+
+		agp_req.size = info.aperture_size;
+		agp_req.type = 0;
+		err = drm_agp_alloc(dev, &agp_req);
+		if (err) {
+			DRM_ERROR("Unable to alloc AGP: %d\n", err);
+			goto no_agp;
+		}
+
+		bind_req.handle = agp_req.handle;
+		bind_req.offset = 0;
+		err = drm_agp_bind(dev, &bind_req);
+		if (err) {
+			DRM_ERROR("Unable to bind AGP: %d\n", err);
+			goto no_agp;
+		}
+
+		if (init_heap(&dev_priv->agp_heap, info.aperture_base, info.aperture_size))
+			goto no_agp;
+	}
+no_agp:
+
+	/* Init FB */
+	if (nouveau_mem_fb_amount(dev)>256*1024*1024) {
+		/* On cards with > 256Mb, you can't map everything. 
+		 * So we create a second FB heap for that type of memory */
+		if (init_heap(&dev_priv->fb_heap, drm_get_resource_start(dev,1), 256*1024*1024))
+			return DRM_ERR(ENOMEM);
+		if (init_heap(&dev_priv->fb_nomap_heap, drm_get_resource_start(dev,1)+256*1024*1024, nouveau_mem_fb_amount(dev)-256*1024*1024))
+			return DRM_ERR(ENOMEM);
+	} else {
+		if (init_heap(&dev_priv->fb_heap, drm_get_resource_start(dev,1), nouveau_mem_fb_amount(dev)))
+			return DRM_ERR(ENOMEM);
+		dev_priv->fb_nomap_heap=NULL;
+	}
+
+	return 0;
+}
+
+struct mem_block* nouveau_mem_alloc(struct drm_device *dev, int alignment, uint64_t size, int flags, DRMFILE filp)
+{
+	struct mem_block *block;
+	int type;
+	drm_nouveau_private_t *dev_priv = dev->dev_private;
+
+	/*
+	 * Init memory if needed
+	 */
+	if (meminit_ok==0)
+	{
+		nouveau_mem_init(dev);
+		meminit_ok=1;
+	}
+
+	/* 
+	 * Make things easier on ourselves: all allocations are page-aligned. 
+	 * We need that to map allocated regions into the user space
+	 */
+	if (alignment < PAGE_SHIFT)
+		alignment = PAGE_SHIFT;
+
+	/*
+	 * Warn about 0 sized allocations, but let it go through. It'll return 1 page
+	 */
+	if (size == 0)
+		DRM_INFO("warning : 0 byte allocation\n");
+
+	/*
+	 * Keep alloc size a multiple of the page size to keep drm_addmap() happy
+	 */
+	if (size & (~PAGE_MASK))
+		size = ((size/PAGE_SIZE) + 1) * PAGE_SIZE;
+
+	if (flags&NOUVEAU_MEM_AGP) {
+		type=NOUVEAU_MEM_AGP;
+		block = alloc_block(dev_priv->agp_heap, size, alignment, filp);
+		if (block) goto alloc_ok;
+	}
+	if (flags&(NOUVEAU_MEM_FB|NOUVEAU_MEM_FB_ACCEPTABLE)) {
+		type=NOUVEAU_MEM_FB;
+		if (!(flags&NOUVEAU_MEM_MAPPED)) {
+			block = alloc_block(dev_priv->fb_nomap_heap, size, alignment, filp);
+			if (block) goto alloc_ok;
+		}
+		block = alloc_block(dev_priv->fb_heap, size, alignment, filp);
+		if (block) goto alloc_ok;	
+	}
+	if (flags&NOUVEAU_MEM_AGP_ACCEPTABLE) {
+		type=NOUVEAU_MEM_AGP;
+		block = alloc_block(dev_priv->agp_heap, size, alignment, filp);
+		if (block) goto alloc_ok;
+	}
+
+	return NULL;
+
+alloc_ok:
+	block->flags=type;
+
+	if (flags&NOUVEAU_MEM_MAPPED)
+	{
+		int ret;
+		block->flags|=NOUVEAU_MEM_MAPPED;
+
+		if (type == NOUVEAU_MEM_AGP)
+			ret = drm_addmap(dev, block->start - dev->agp->base, block->size, 
+					_DRM_AGP, 0, &block->map);
+		else
+			ret = drm_addmap(dev, block->start, block->size,
+					_DRM_FRAME_BUFFER, 0, &block->map);
+		if (ret) { 
+			free_block(block);
+			return NULL;
+		}
+	}
+
+	DRM_INFO("allocated 0x%llx\n", block->start);
+	return block;
+}
+
+void nouveau_mem_free(struct drm_device* dev, struct mem_block* block)
+{
+	DRM_INFO("freeing 0x%llx\n", block->start);
+	if (meminit_ok==0)
+	{
+		DRM_ERROR("%s called without init\n", __FUNCTION__);
+		return;
+	}
+	if (block->flags&NOUVEAU_MEM_MAPPED)
+		drm_rmmap(dev, block->map);
+	free_block(block);
+}
+
+/*
+ * Ioctls
+ */
+
+int nouveau_ioctl_mem_alloc(DRM_IOCTL_ARGS)
+{
+	DRM_DEVICE;
+	drm_nouveau_private_t *dev_priv = dev->dev_private;
+	drm_nouveau_mem_alloc_t alloc;
+	struct mem_block *block;
+
+	if (!dev_priv) {
+		DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
+		return DRM_ERR(EINVAL);
+	}
+
+	DRM_COPY_FROM_USER_IOCTL(alloc, (drm_nouveau_mem_alloc_t __user *) data,
+				 sizeof(alloc));
+
+	block=nouveau_mem_alloc(dev, alloc.alignment, alloc.size, alloc.flags, filp);
+	if (!block)
+		return DRM_ERR(ENOMEM);
+
+	if (DRM_COPY_TO_USER(alloc.region_offset, &block->start, sizeof(uint64_t))) {
+		DRM_ERROR("copy_to_user\n");
+		return DRM_ERR(EFAULT);
+	}
+
+	return 0;
+}
+
+int nouveau_ioctl_mem_free(DRM_IOCTL_ARGS)
+{
+	DRM_DEVICE;
+	drm_nouveau_private_t *dev_priv = dev->dev_private;
+	drm_nouveau_mem_free_t memfree;
+	struct mem_block *block;
+
+	if (!dev_priv) {
+		DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
+		return DRM_ERR(EINVAL);
+	}
+
+	DRM_COPY_FROM_USER_IOCTL(memfree, (drm_nouveau_mem_free_t __user *) data,
+				 sizeof(memfree));
+
+	block=NULL;
+	if (memfree.flags&NOUVEAU_MEM_FB)
+		block = find_block(dev_priv->fb_heap, memfree.region_offset);
+	else if (memfree.flags&NOUVEAU_MEM_AGP)
+		block = find_block(dev_priv->agp_heap, memfree.region_offset);
+	if (!block)
+		return DRM_ERR(EFAULT);
+	if (block->filp != filp)
+		return DRM_ERR(EPERM);
+
+	nouveau_mem_free(dev, block);
+	return 0;
+}
+
+