panfrost: Initial stub for Panfrost driver

This patch adds an initial stub for the Gallium driver, containing
simple screen functions and the majority of the driver headers but no
actual functionality. It further adds the winsys glue for linking in
this stub driver via kmsro on Rockchip/Amlogic boards.

Signed-off-by: Alyssa Rosenzweig <[email protected]>
Acked-by: Jason Ekstrand <[email protected]>
Acked-by: Rob Clark <[email protected]>
Acked-by: Eric Anholt <[email protected]>
Acked-by: Emil Velikov <[email protected]>

1 files changed, 123 insertions, 0 deletions

diff --git a/src/gallium/drivers/panfrost/pan_allocate.h b/src/gallium/drivers/panfrost/pan_allocate.h
new file mode 100644
index 00000000000..2084a339552
--- /dev/null
+++ b/src/gallium/drivers/panfrost/pan_allocate.h
@@ -0,0 +1,123 @@
+/*
+ * © Copyright 2017-2018 Alyssa Rosenzweig
+ *
+ * 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 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.
+ *
+ */
+
+#ifndef __PAN_ALLOCATE_H__
+#define __PAN_ALLOCATE_H__
+
+#include <unistd.h>
+#include <sys/mman.h>
+#include <stdbool.h>
+#include "pipebuffer/pb_slab.h"
+
+#include <panfrost-misc.h>
+
+struct panfrost_context;
+
+/* Texture memory */
+
+#define HEAP_TEXTURE 0
+
+/* Single-frame (transient) command stream memory, done at the block scale
+ * rather than the individual cmdstream alllocation scale. We use pb_alloc for
+ * pooling, but we have to implement our own logic atop the API for performance
+ * reasons when considering many low-latency tiny heterogenous allocations */
+
+#define HEAP_TRANSIENT 1
+
+/* Multi-frame descriptor memory (replaces what used to be
+ * cmdstream_persistent), for long-living small allocations */
+
+#define HEAP_DESCRIPTOR 2
+
+/* Represents a fat pointer for GPU-mapped memory, returned from the transient
+ * allocator and not used for much else */
+
+struct panfrost_transfer {
+        uint8_t *cpu;
+        mali_ptr gpu;
+};
+
+struct panfrost_memory {
+        /* Subclassing slab object */
+        struct pb_slab slab;
+
+        /* Backing for the slab in memory */
+        uint8_t *cpu;
+        mali_ptr gpu;
+        int stack_bottom;
+        size_t size;
+};
+
+/* Slab entry sizes range from 2^min to 2^max. In this case, we range from 1k
+ * to 16MB. Numbers are kind of arbitrary but these seem to work alright in
+ * practice. */
+
+#define MIN_SLAB_ENTRY_SIZE (10)
+#define MAX_SLAB_ENTRY_SIZE (24)
+
+struct panfrost_memory_entry {
+        /* Subclass */
+        struct pb_slab_entry base;
+
+        /* Have we been freed? */
+        bool freed;
+
+        /* Offset into the slab of the entry */
+        off_t offset;
+};
+
+/* Functions for replay */
+mali_ptr pandev_upload(int cheating_offset, int *stack_bottom, mali_ptr base, void *base_map, const void *data, size_t sz, bool no_pad);
+mali_ptr pandev_upload_sequential(mali_ptr base, void *base_map, const void *data, size_t sz);
+
+/* Functions for the actual Galliumish driver */
+mali_ptr panfrost_upload(struct panfrost_memory *mem, const void *data, size_t sz, bool no_pad);
+mali_ptr panfrost_upload_sequential(struct panfrost_memory *mem, const void *data, size_t sz);
+
+struct panfrost_transfer
+panfrost_allocate_transient(struct panfrost_context *ctx, size_t sz);
+
+mali_ptr
+panfrost_upload_transient(struct panfrost_context *ctx, const void *data, size_t sz);
+
+void *
+panfrost_allocate_transfer(struct panfrost_memory *mem, size_t sz, mali_ptr *gpu);
+
+static inline mali_ptr
+panfrost_reserve(struct panfrost_memory *mem, size_t sz)
+{
+        mem->stack_bottom += sz;
+        return mem->gpu + (mem->stack_bottom - sz);
+}
+
+struct panfrost_transfer
+panfrost_allocate_chunk(struct panfrost_context *ctx, size_t size, unsigned heap_id);
+
+#include <math.h>
+#define inff INFINITY
+
+#define R(...) #__VA_ARGS__
+#define ALIGN(x, y) (((x) + ((y) - 1)) & ~((y) - 1))
+
+#endif /* __PAN_ALLOCATE_H__ */