drm: add libdrm_amdgpu (v7)

This is the new ioctl wrapper used by the new admgpu driver.
It's primarily used by xf86-video-amdgpu and mesa.

v2: fix amdgpu_drm.h install
v3: Integrate some of the sugestions from Emil:
    clean up Makefile.am, configure.ac
    capitalize header guards
    fix _FILE_OFFSET_BITS with config.h
    use drm_mmap/drm_munmap
    Remove unused ARRAY_SIZE macro
    use shared list implementation
    use shared math implementation
    use drmGetNodeTypeFromFd helper
v4: remove unused tiling defines
v5: include amdgpu.h in Makefile.am
v6: update amdgpu_drm.h
v7: libdrm.h -> libdrm_macros.h

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 169 insertions, 0 deletions

diff --git a/amdgpu/amdgpu_vamgr.c b/amdgpu/amdgpu_vamgr.c
new file mode 100644
index 00000000..23359122
--- /dev/null
+++ b/amdgpu/amdgpu_vamgr.c
@@ -0,0 +1,169 @@
+/*
+ * Copyright 2014 Advanced Micro Devices, 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.
+ *
+*/
+
+#include <stdlib.h>
+#include <string.h>
+#include "amdgpu.h"
+#include "amdgpu_drm.h"
+#include "amdgpu_internal.h"
+#include "util_math.h"
+
+void amdgpu_vamgr_init(struct amdgpu_device *dev)
+{
+        struct amdgpu_bo_va_mgr *vamgr = &dev->vamgr;
+
+        vamgr->va_offset = dev->dev_info.virtual_address_offset;
+        vamgr->va_alignment = dev->dev_info.virtual_address_alignment;
+
+        list_inithead(&vamgr->va_holes);
+        pthread_mutex_init(&vamgr->bo_va_mutex, NULL);
+}
+
+uint64_t amdgpu_vamgr_find_va(struct amdgpu_bo_va_mgr *mgr,
+                               uint64_t size, uint64_t alignment)
+{
+        struct amdgpu_bo_va_hole *hole, *n;
+        uint64_t offset = 0, waste = 0;
+
+        alignment = MAX2(alignment, mgr->va_alignment);
+        size = ALIGN(size, mgr->va_alignment);
+
+        pthread_mutex_lock(&mgr->bo_va_mutex);
+        /* TODO: using more appropriate way to track the holes */
+        /* first look for a hole */
+        LIST_FOR_EACH_ENTRY_SAFE(hole, n, &mgr->va_holes, list) {
+                offset = hole->offset;
+                waste = offset % alignment;
+                waste = waste ? alignment - waste : 0;
+                offset += waste;
+                if (offset >= (hole->offset + hole->size)) {
+                        continue;
+                }
+                if (!waste && hole->size == size) {
+                        offset = hole->offset;
+                        list_del(&hole->list);
+                        free(hole);
+                        pthread_mutex_unlock(&mgr->bo_va_mutex);
+                        return offset;
+                }
+                if ((hole->size - waste) > size) {
+                        if (waste) {
+                                n = calloc(1,
+                                           sizeof(struct amdgpu_bo_va_hole));
+                                n->size = waste;
+                                n->offset = hole->offset;
+                                list_add(&n->list, &hole->list);
+                        }
+                        hole->size -= (size + waste);
+                        hole->offset += size + waste;
+                        pthread_mutex_unlock(&mgr->bo_va_mutex);
+                        return offset;
+                }
+                if ((hole->size - waste) == size) {
+                        hole->size = waste;
+                        pthread_mutex_unlock(&mgr->bo_va_mutex);
+                        return offset;
+                }
+        }
+
+        offset = mgr->va_offset;
+        waste = offset % alignment;
+        waste = waste ? alignment - waste : 0;
+        if (waste) {
+                n = calloc(1, sizeof(struct amdgpu_bo_va_hole));
+                n->size = waste;
+                n->offset = offset;
+                list_add(&n->list, &mgr->va_holes);
+        }
+        offset += waste;
+        mgr->va_offset += size + waste;
+        pthread_mutex_unlock(&mgr->bo_va_mutex);
+        return offset;
+}
+
+void amdgpu_vamgr_free_va(struct amdgpu_bo_va_mgr *mgr, uint64_t va,
+                           uint64_t size)
+{
+        struct amdgpu_bo_va_hole *hole;
+
+        size = ALIGN(size, mgr->va_alignment);
+
+        pthread_mutex_lock(&mgr->bo_va_mutex);
+        if ((va + size) == mgr->va_offset) {
+                mgr->va_offset = va;
+                /* Delete uppermost hole if it reaches the new top */
+                if (!LIST_IS_EMPTY(&mgr->va_holes)) {
+                        hole = container_of(mgr->va_holes.next, hole, list);
+                        if ((hole->offset + hole->size) == va) {
+                                mgr->va_offset = hole->offset;
+                                list_del(&hole->list);
+                                free(hole);
+                        }
+                }
+        } else {
+                struct amdgpu_bo_va_hole *next;
+
+                hole = container_of(&mgr->va_holes, hole, list);
+                LIST_FOR_EACH_ENTRY(next, &mgr->va_holes, list) {
+                        if (next->offset < va)
+                                break;
+                        hole = next;
+                }
+
+                if (&hole->list != &mgr->va_holes) {
+                        /* Grow upper hole if it's adjacent */
+                        if (hole->offset == (va + size)) {
+                                hole->offset = va;
+                                hole->size += size;
+                                /* Merge lower hole if it's adjacent */
+                                if (next != hole
+                                    && &next->list != &mgr->va_holes
+                                    && (next->offset + next->size) == va) {
+                                        next->size += hole->size;
+                                        list_del(&hole->list);
+                                        free(hole);
+                                }
+                                goto out;
+                        }
+                }
+
+                /* Grow lower hole if it's adjacent */
+                if (next != hole && &next->list != &mgr->va_holes &&
+                    (next->offset + next->size) == va) {
+                        next->size += size;
+                        goto out;
+                }
+
+                /* FIXME on allocation failure we just lose virtual address space
+                 * maybe print a warning
+                 */
+                next = calloc(1, sizeof(struct amdgpu_bo_va_hole));
+                if (next) {
+                        next->size = size;
+                        next->offset = va;
+                        list_add(&next->list, &hole->list);
+                }
+        }
+out:
+        pthread_mutex_unlock(&mgr->bo_va_mutex);
+}