pan_device.h

/**************************************************************************
 *
 * Copyright 2018-2019 Alyssa Rosenzweig
 * Copyright 2018-2019 Collabora, Ltd.
 * Copyright © 2015 Intel 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, 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 VMWARE 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.
 *
 **************************************************************************/

#ifndef PAN_DEVICE_H
#define PAN_DEVICE_H

#include <xf86drm.h>
#include "renderonly/renderonly.h"
#include "util/u_dynarray.h"
#include "util/bitset.h"
#include "util/list.h"
#include "util/sparse_array.h"

#include "panfrost/util/pan_ir.h"
#include "pan_pool.h"
#include "pan_util.h"

#include <midgard_pack.h>

#if defined(__cplusplus)
extern "C" {
#endif

/* Driver limits */
#define PAN_MAX_CONST_BUFFERS 16

/* How many power-of-two levels in the BO cache do we want? 2^12
 * minimum chosen as it is the page size that all allocations are
 * rounded to */

#define MIN_BO_CACHE_BUCKET (12) /* 2^12 = 4KB */
#define MAX_BO_CACHE_BUCKET (22) /* 2^22 = 4MB */

/* Fencepost problem, hence the off-by-one */
#define NR_BO_CACHE_BUCKETS (MAX_BO_CACHE_BUCKET - MIN_BO_CACHE_BUCKET + 1)

struct pan_blitter {
        struct {
                struct pan_pool *pool;
                struct hash_table *blit;
                struct hash_table *blend;
                pthread_mutex_t lock;
        } shaders;
        struct {
                struct pan_pool *pool;
                struct hash_table *rsds;
                pthread_mutex_t lock;
        } rsds;
};

struct pan_blend_shaders {
        struct hash_table *shaders;
        pthread_mutex_t lock;
};

enum pan_indirect_draw_flags {
        PAN_INDIRECT_DRAW_NO_INDEX = 0 << 0,
        PAN_INDIRECT_DRAW_1B_INDEX = 1 << 0,
        PAN_INDIRECT_DRAW_2B_INDEX = 2 << 0,
        PAN_INDIRECT_DRAW_4B_INDEX = 3 << 0,
        PAN_INDIRECT_DRAW_INDEX_SIZE_MASK = 3 << 0,
        PAN_INDIRECT_DRAW_HAS_PSIZ = 1 << 2,
        PAN_INDIRECT_DRAW_PRIMITIVE_RESTART = 1 << 3,
        PAN_INDIRECT_DRAW_UPDATE_PRIM_SIZE = 1 << 4,
        PAN_INDIRECT_DRAW_LAST_FLAG = PAN_INDIRECT_DRAW_UPDATE_PRIM_SIZE,
        PAN_INDIRECT_DRAW_FLAGS_MASK = (PAN_INDIRECT_DRAW_LAST_FLAG << 1) - 1,
        PAN_INDIRECT_DRAW_MIN_MAX_SEARCH_1B_INDEX = PAN_INDIRECT_DRAW_LAST_FLAG << 1,
        PAN_INDIRECT_DRAW_MIN_MAX_SEARCH_2B_INDEX,
        PAN_INDIRECT_DRAW_MIN_MAX_SEARCH_4B_INDEX,
        PAN_INDIRECT_DRAW_NUM_SHADERS,
};

struct pan_indirect_draw_shader {
        struct panfrost_ubo_push push;
        mali_ptr rsd;
};

struct pan_indirect_draw_shaders {
        struct pan_indirect_draw_shader shaders[PAN_INDIRECT_DRAW_NUM_SHADERS];

        /* Take the lock when initializing the draw shaders context or when
         * allocating from the binary pool.
         */
        pthread_mutex_t lock;

        /* A memory pool for shader binaries. We currently don't allocate a
         * single BO for all shaders up-front because estimating shader size
         * is not trivial, and changes to the compiler might influence this
         * estimation.
         */
        struct pan_pool *bin_pool;

        /* BO containing all renderer states attached to the compute shaders.
         * Those are built at shader compilation time and re-used every time
         * panfrost_emit_indirect_draw() is called.
         */
        struct panfrost_bo *states;

        /* Varying memory is allocated dynamically by compute jobs from this
         * heap.
         */
        struct panfrost_bo *varying_heap;
};

struct pan_indirect_dispatch {
        struct panfrost_ubo_push push;
        struct panfrost_bo *bin;
        struct panfrost_bo *descs;
};

/** Implementation-defined tiler features */
struct panfrost_tiler_features {
        /** Number of bytes per tiler bin */
        unsigned bin_size;

        /** Maximum number of levels that may be simultaneously enabled.
         * Invariant: bitcount(hierarchy_mask) <= max_levels */
        unsigned max_levels;
};

struct panfrost_device {
        /* For ralloc */
        void *memctx;

        int fd;

        /* Properties of the GPU in use */
        unsigned arch;
        unsigned gpu_id;
        unsigned core_count;
        unsigned thread_tls_alloc;
        struct panfrost_tiler_features tiler_features;
        unsigned quirks;

        /* Table of formats, indexed by a PIPE format */
        const struct panfrost_format *formats;

        /* Bitmask of supported compressed texture formats */
        uint32_t compressed_formats;

        /* debug flags, see pan_util.h how to interpret */
        unsigned debug;

        drmVersionPtr kernel_version;

        struct renderonly *ro;

        pthread_mutex_t bo_map_lock;
        struct util_sparse_array bo_map;

        struct {
                pthread_mutex_t lock;

                /* List containing all cached BOs sorted in LRU (Least
                 * Recently Used) order. This allows us to quickly evict BOs
                 * that are more than 1 second old.
                 */
                struct list_head lru;

                /* The BO cache is a set of buckets with power-of-two sizes
                 * ranging from 2^12 (4096, the page size) to
                 * 2^(12 + MAX_BO_CACHE_BUCKETS).
                 * Each bucket is a linked list of free panfrost_bo objects. */

                struct list_head buckets[NR_BO_CACHE_BUCKETS];
        } bo_cache;

        struct pan_blitter blitter;
        struct pan_blend_shaders blend_shaders;
        struct pan_indirect_draw_shaders indirect_draw_shaders;
        struct pan_indirect_dispatch indirect_dispatch;

        /* Tiler heap shared across all tiler jobs, allocated against the
         * device since there's only a single tiler. Since this is invisible to
         * the CPU, it's okay for multiple contexts to reference it
         * simultaneously; by keeping on the device struct, we eliminate a
         * costly per-context allocation. */

        struct panfrost_bo *tiler_heap;

        /* The tiler heap is shared by all contexts, and is written by tiler
         * jobs and read by fragment job. We need to ensure that a
         * vertex/tiler job chain from one context is not inserted between
         * the vertex/tiler and fragment job of another context, otherwise
         * we end up with tiler heap corruption.
         */
        pthread_mutex_t submit_lock;

        /* Sample positions are preloaded into a write-once constant buffer,
         * such that they can be referenced fore free later. Needed
         * unconditionally on Bifrost, and useful for sharing with Midgard */

        struct panfrost_bo *sample_positions;
};

void
panfrost_open_device(void *memctx, int fd, struct panfrost_device *dev);

void
panfrost_close_device(struct panfrost_device *dev);

bool
panfrost_supports_compressed_format(struct panfrost_device *dev, unsigned fmt);

void
panfrost_upload_sample_positions(struct panfrost_device *dev);

mali_ptr
panfrost_sample_positions(const struct panfrost_device *dev,
                enum mali_sample_pattern pattern);
void
panfrost_query_sample_position(
                enum mali_sample_pattern pattern,
                unsigned sample_idx,
                float *out);

static inline struct panfrost_bo *
pan_lookup_bo(struct panfrost_device *dev, uint32_t gem_handle)
{
        return (struct panfrost_bo *)util_sparse_array_get(&dev->bo_map, gem_handle);
}

static inline bool
pan_is_bifrost(const struct panfrost_device *dev)
{
        return dev->arch >= 6 && dev->arch <= 7;
}

#if defined(__cplusplus)
} // extern "C"
#endif

#endif