drm: Add via unichrome support
Add DRM device driver for VIA Unichrome chipsets
From: Unichrome Project http://unichrome.sf.net, Erdi Chen, Thomas Hellstrom Signed-off-by: Dave Airlie <airlied@linux.ie>
diff --git a/drivers/char/drm/via_mm.c b/drivers/char/drm/via_mm.c
new file mode 100644
index 0000000..c22712f
--- /dev/null
+++ b/drivers/char/drm/via_mm.c
@@ -0,0 +1,358 @@
+/*
+ * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2003 S3 Graphics, Inc. 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, sub license,
+ * 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 NON-INFRINGEMENT. IN NO EVENT SHALL
+ * VIA, S3 GRAPHICS, 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 "via_drm.h"
+#include "via_drv.h"
+#include "via_ds.h"
+#include "via_mm.h"
+
+#define MAX_CONTEXT 100
+
+typedef struct {
+ int used;
+ int context;
+ set_t *sets[2]; /* 0 for frame buffer, 1 for AGP , 2 for System */
+} via_context_t;
+
+static via_context_t global_ppriv[MAX_CONTEXT];
+
+static int via_agp_alloc(drm_via_mem_t * mem);
+static int via_agp_free(drm_via_mem_t * mem);
+static int via_fb_alloc(drm_via_mem_t * mem);
+static int via_fb_free(drm_via_mem_t * mem);
+
+static int add_alloc_set(int context, int type, unsigned int val)
+{
+ int i, retval = 0;
+
+ for (i = 0; i < MAX_CONTEXT; i++) {
+ if (global_ppriv[i].used && global_ppriv[i].context == context) {
+ retval = via_setAdd(global_ppriv[i].sets[type], val);
+ break;
+ }
+ }
+
+ return retval;
+}
+
+static int del_alloc_set(int context, int type, unsigned int val)
+{
+ int i, retval = 0;
+
+ for (i = 0; i < MAX_CONTEXT; i++)
+ if (global_ppriv[i].used && global_ppriv[i].context == context) {
+ retval = via_setDel(global_ppriv[i].sets[type], val);
+ break;
+ }
+
+ return retval;
+}
+
+/* agp memory management */
+static memHeap_t *AgpHeap = NULL;
+
+int via_agp_init(DRM_IOCTL_ARGS)
+{
+ drm_via_agp_t agp;
+
+ DRM_COPY_FROM_USER_IOCTL(agp, (drm_via_agp_t *) data, sizeof(agp));
+
+ AgpHeap = via_mmInit(agp.offset, agp.size);
+
+ DRM_DEBUG("offset = %lu, size = %lu", (unsigned long)agp.offset, (unsigned long)agp.size);
+
+ return 0;
+}
+
+/* fb memory management */
+static memHeap_t *FBHeap = NULL;
+
+int via_fb_init(DRM_IOCTL_ARGS)
+{
+ drm_via_fb_t fb;
+
+ DRM_COPY_FROM_USER_IOCTL(fb, (drm_via_fb_t *) data, sizeof(fb));
+
+ FBHeap = via_mmInit(fb.offset, fb.size);
+
+ DRM_DEBUG("offset = %lu, size = %lu", (unsigned long)fb.offset, (unsigned long)fb.size);
+
+ return 0;
+}
+
+int via_init_context(struct drm_device *dev, int context)
+{
+ int i;
+
+ for (i = 0; i < MAX_CONTEXT; i++)
+ if (global_ppriv[i].used &&
+ (global_ppriv[i].context == context))
+ break;
+
+ if (i >= MAX_CONTEXT) {
+ for (i = 0; i < MAX_CONTEXT; i++) {
+ if (!global_ppriv[i].used) {
+ global_ppriv[i].context = context;
+ global_ppriv[i].used = 1;
+ global_ppriv[i].sets[0] = via_setInit();
+ global_ppriv[i].sets[1] = via_setInit();
+ DRM_DEBUG("init allocation set, socket=%d,"
+ " context = %d\n", i, context);
+ break;
+ }
+ }
+
+ if ((i >= MAX_CONTEXT) || (global_ppriv[i].sets[0] == NULL) ||
+ (global_ppriv[i].sets[1] == NULL)) {
+ return 0;
+ }
+ }
+
+ return 1;
+}
+
+int via_final_context(struct drm_device *dev, int context)
+{
+ int i;
+ drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
+
+ for (i = 0; i < MAX_CONTEXT; i++)
+ if (global_ppriv[i].used &&
+ (global_ppriv[i].context == context))
+ break;
+
+ if (i < MAX_CONTEXT) {
+ set_t *set;
+ ITEM_TYPE item;
+ int retval;
+
+ DRM_DEBUG("find socket %d, context = %d\n", i, context);
+
+ /* Video Memory */
+ set = global_ppriv[i].sets[0];
+ retval = via_setFirst(set, &item);
+ while (retval) {
+ DRM_DEBUG("free video memory 0x%lx\n", item);
+ via_mmFreeMem((PMemBlock) item);
+ retval = via_setNext(set, &item);
+ }
+ via_setDestroy(set);
+
+ /* AGP Memory */
+ set = global_ppriv[i].sets[1];
+ retval = via_setFirst(set, &item);
+ while (retval) {
+ DRM_DEBUG("free agp memory 0x%lx\n", item);
+ via_mmFreeMem((PMemBlock) item);
+ retval = via_setNext(set, &item);
+ }
+ via_setDestroy(set);
+ global_ppriv[i].used = 0;
+ }
+ via_release_futex(dev_priv, context);
+
+
+#if defined(__linux__)
+ /* Linux specific until context tracking code gets ported to BSD */
+ /* Last context, perform cleanup */
+ if (dev->ctx_count == 1 && dev->dev_private) {
+ DRM_DEBUG("Last Context\n");
+ if (dev->irq)
+ drm_irq_uninstall(dev);
+
+ via_cleanup_futex(dev_priv);
+ via_do_cleanup_map(dev);
+ }
+#endif
+
+ return 1;
+}
+
+int via_mem_alloc(DRM_IOCTL_ARGS)
+{
+ drm_via_mem_t mem;
+
+ DRM_COPY_FROM_USER_IOCTL(mem, (drm_via_mem_t *) data, sizeof(mem));
+
+ switch (mem.type) {
+ case VIDEO:
+ if (via_fb_alloc(&mem) < 0)
+ return -EFAULT;
+ DRM_COPY_TO_USER_IOCTL((drm_via_mem_t *) data, mem,
+ sizeof(mem));
+ return 0;
+ case AGP:
+ if (via_agp_alloc(&mem) < 0)
+ return -EFAULT;
+ DRM_COPY_TO_USER_IOCTL((drm_via_mem_t *) data, mem,
+ sizeof(mem));
+ return 0;
+ }
+
+ return -EFAULT;
+}
+
+static int via_fb_alloc(drm_via_mem_t * mem)
+{
+ drm_via_mm_t fb;
+ PMemBlock block;
+ int retval = 0;
+
+ if (!FBHeap)
+ return -1;
+
+ fb.size = mem->size;
+ fb.context = mem->context;
+
+ block = via_mmAllocMem(FBHeap, fb.size, 5, 0);
+ if (block) {
+ fb.offset = block->ofs;
+ fb.free = (unsigned long)block;
+ if (!add_alloc_set(fb.context, VIDEO, fb.free)) {
+ DRM_DEBUG("adding to allocation set fails\n");
+ via_mmFreeMem((PMemBlock) fb.free);
+ retval = -1;
+ }
+ } else {
+ fb.offset = 0;
+ fb.size = 0;
+ fb.free = 0;
+ retval = -1;
+ }
+
+ mem->offset = fb.offset;
+ mem->index = fb.free;
+
+ DRM_DEBUG("alloc fb, size = %d, offset = %d\n", fb.size,
+ (int)fb.offset);
+
+ return retval;
+}
+
+static int via_agp_alloc(drm_via_mem_t * mem)
+{
+ drm_via_mm_t agp;
+ PMemBlock block;
+ int retval = 0;
+
+ if (!AgpHeap)
+ return -1;
+
+ agp.size = mem->size;
+ agp.context = mem->context;
+
+ block = via_mmAllocMem(AgpHeap, agp.size, 5, 0);
+ if (block) {
+ agp.offset = block->ofs;
+ agp.free = (unsigned long)block;
+ if (!add_alloc_set(agp.context, AGP, agp.free)) {
+ DRM_DEBUG("adding to allocation set fails\n");
+ via_mmFreeMem((PMemBlock) agp.free);
+ retval = -1;
+ }
+ } else {
+ agp.offset = 0;
+ agp.size = 0;
+ agp.free = 0;
+ }
+
+ mem->offset = agp.offset;
+ mem->index = agp.free;
+
+ DRM_DEBUG("alloc agp, size = %d, offset = %d\n", agp.size,
+ (unsigned int)agp.offset);
+ return retval;
+}
+
+int via_mem_free(DRM_IOCTL_ARGS)
+{
+ drm_via_mem_t mem;
+
+ DRM_COPY_FROM_USER_IOCTL(mem, (drm_via_mem_t *) data, sizeof(mem));
+
+ switch (mem.type) {
+
+ case VIDEO:
+ if (via_fb_free(&mem) == 0)
+ return 0;
+ break;
+ case AGP:
+ if (via_agp_free(&mem) == 0)
+ return 0;
+ break;
+ }
+
+ return -EFAULT;
+}
+
+static int via_fb_free(drm_via_mem_t * mem)
+{
+ drm_via_mm_t fb;
+ int retval = 0;
+
+ if (!FBHeap) {
+ return -1;
+ }
+
+ fb.free = mem->index;
+ fb.context = mem->context;
+
+ if (!fb.free) {
+ return -1;
+
+ }
+
+ via_mmFreeMem((PMemBlock) fb.free);
+
+ if (!del_alloc_set(fb.context, VIDEO, fb.free)) {
+ retval = -1;
+ }
+
+ DRM_DEBUG("free fb, free = %ld\n", fb.free);
+
+ return retval;
+}
+
+static int via_agp_free(drm_via_mem_t * mem)
+{
+ drm_via_mm_t agp;
+
+ int retval = 0;
+
+ agp.free = mem->index;
+ agp.context = mem->context;
+
+ if (!agp.free)
+ return -1;
+
+ via_mmFreeMem((PMemBlock) agp.free);
+
+ if (!del_alloc_set(agp.context, AGP, agp.free)) {
+ retval = -1;
+ }
+
+ DRM_DEBUG("free agp, free = %ld\n", agp.free);
+
+ return retval;
+}