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-rw-r--r--shared-core/nouveau_mem.c503
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;
+}
+
+
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