Include nvgpu headers

These are needed to build on NVIDIA's Jetson boards for the time
being. Only a couple structs are required, so it should be fairly
easy to remove this dependency at some point in the future.

1 files changed, 140 insertions, 0 deletions

diff --git a/include/os/posix/posix-nvgpu_mem.c b/include/os/posix/posix-nvgpu_mem.c
new file mode 100644
index 0000000..26770e4
--- /dev/null
+++ b/include/os/posix/posix-nvgpu_mem.c
@@ -0,0 +1,140 @@
+/*
+ * Copyright (c) 2018, NVIDIA CORPORATION.  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 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 OR COPYRIGHT HOLDERS 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 <nvgpu/bug.h>
+#include <nvgpu/dma.h>
+#include <nvgpu/gmmu.h>
+#include <nvgpu/kmem.h>
+#include <nvgpu/nvgpu_mem.h>
+
+/*
+ * These functions are somewhat meaningless.
+ */
+u64 nvgpu_mem_get_addr(struct gk20a *g, struct nvgpu_mem *mem)
+{
+        return (u64)(uintptr_t)mem->cpu_va;
+}
+
+u64 nvgpu_mem_get_phys_addr(struct gk20a *g, struct nvgpu_mem *mem)
+{
+        return (u64)(uintptr_t)mem->cpu_va;
+}
+
+static struct nvgpu_sgl *nvgpu_mem_sgl_next(struct nvgpu_sgl *sgl)
+{
+        return NULL;
+}
+
+static u64 nvgpu_mem_sgl_phys(struct gk20a *g, struct nvgpu_sgl *sgl)
+{
+        struct nvgpu_mem *mem = (struct nvgpu_mem *)sgl;
+
+        return (u64)(uintptr_t)mem->cpu_va;
+}
+
+static u64 nvgpu_mem_sgl_dma(struct nvgpu_sgl *sgl)
+{
+        struct nvgpu_mem *mem = (struct nvgpu_mem *)sgl;
+
+        return (u64)(uintptr_t)mem->cpu_va;
+}
+
+static u64 nvgpu_mem_sgl_length(struct nvgpu_sgl *sgl)
+{
+        struct nvgpu_mem *mem = (struct nvgpu_mem *)sgl;
+
+        return (u64)mem->aligned_size;
+}
+
+static u64 nvgpu_mem_sgl_gpu_addr(struct gk20a *g, struct nvgpu_sgl *sgl,
+                                  struct nvgpu_gmmu_attrs *attrs)
+{
+        struct nvgpu_mem *mem = (struct nvgpu_mem *)sgl;
+
+        return mem->gpu_va;
+}
+
+static bool nvgpu_mem_sgt_iommuable(struct gk20a *g, struct nvgpu_sgt *sgt)
+{
+        return nvgpu_iommuable(g);
+}
+
+static void nvgpu_mem_sgt_free(struct gk20a *g, struct nvgpu_sgt *sgt)
+{
+        nvgpu_kfree(g, sgt);
+}
+
+static struct nvgpu_sgt_ops nvgpu_sgt_posix_ops = {
+        .sgl_next       = nvgpu_mem_sgl_next,
+        .sgl_phys       = nvgpu_mem_sgl_phys,
+        .sgl_dma        = nvgpu_mem_sgl_dma,
+        .sgl_length     = nvgpu_mem_sgl_length,
+        .sgl_gpu_addr   = nvgpu_mem_sgl_gpu_addr,
+        .sgt_iommuable  = nvgpu_mem_sgt_iommuable,
+        .sgt_free       = nvgpu_mem_sgt_free,
+};
+
+struct nvgpu_sgt *nvgpu_sgt_create_from_mem(struct gk20a *g,
+                                            struct nvgpu_mem *mem)
+{
+        struct nvgpu_sgt *sgt = nvgpu_kzalloc(g, sizeof(*sgt));
+
+        if (sgt == NULL)
+                return NULL;
+
+        /*
+         * The userspace implementation is simple: a single 'entry' (which we
+         * only need the mem struct to describe). Maybe this could be expanded
+         * to be more interesting some day.
+         */
+        sgt->sgl = (struct nvgpu_sgl *)mem;
+        sgt->ops = &nvgpu_sgt_posix_ops;
+
+        return sgt;
+}
+
+int nvgpu_mem_create_from_mem(struct gk20a *g,
+                              struct nvgpu_mem *dest, struct nvgpu_mem *src,
+                              u64 start_page, int nr_pages)
+{
+        u64 start = start_page * PAGE_SIZE;
+        u64 size = nr_pages * PAGE_SIZE;
+
+        if (src->aperture != APERTURE_SYSMEM)
+                return -EINVAL;
+
+        /* Some silly things a caller might do... */
+        if (size > src->size)
+                return -EINVAL;
+        if ((start + size) > src->size)
+                return -EINVAL;
+
+        memset(dest, 0, sizeof(*dest));
+
+        dest->cpu_va    = ((char *)src->cpu_va) + start;
+        dest->mem_flags = src->mem_flags | NVGPU_MEM_FLAG_SHADOW_COPY;
+        dest->aperture  = src->aperture;
+        dest->skip_wmb  = src->skip_wmb;
+        dest->size      = size;
+
+        return 0;
+}