etnaviv: Rework locking

Replace the per-screen locking of flushing with per-context one and
add per-context lock around command stream buffer accesses, to prevent
cross-context flushing from corrupting these command stream buffers.

Signed-off-by: Marek Vasut <marex@denx.de>

src/gallium/drivers/etnaviv/etnaviv_blt.c

@@ -324,6 +324,7 @@ etna_clear_blt(struct pipe_context *pctx, unsigned buffers,
            const union pipe_color_union *color, double depth, unsigned stencil)
 {
    struct etna_context *ctx = etna_context(pctx);
+   mtx_lock(&ctx->lock);
 
    etna_set_state(ctx->stream, VIVS_GL_FLUSH_CACHE, 0x00000c23);
    etna_set_state(ctx->stream, VIVS_TS_FLUSH_CACHE, VIVS_TS_FLUSH_CACHE_FLUSH);
@@ -344,9 +345,9 @@ etna_clear_blt(struct pipe_context *pctx, unsigned buffers,
       etna_set_state(ctx->stream, VIVS_GL_FLUSH_CACHE, 0x00000c23);
    else
       etna_set_state(ctx->stream, VIVS_GL_FLUSH_CACHE, 0x00000002);
+   mtx_unlock(&ctx->lock);
 }
 
-
 static bool
 etna_try_blt_blit(struct pipe_context *pctx,
                  const struct pipe_blit_info *blit_info)
@@ -416,6 +417,7 @@ etna_try_blt_blit(struct pipe_context *pctx,
          return true;
    }
 
+   mtx_lock(&ctx->lock);
    /* Kick off BLT here */
    if (src == dst && src_lev->ts_compress_fmt < 0) {
       /* Resolve-in-place */
@@ -510,6 +512,7 @@ etna_try_blt_blit(struct pipe_context *pctx,
 
    dst->seqno++;
    dst_lev->ts_valid = false;
+   mtx_unlock(&ctx->lock);
 
    return true;
 }

src/gallium/drivers/etnaviv/etnaviv_context.c

@@ -63,7 +63,7 @@ etna_context_destroy(struct pipe_context *pctx)
    struct etna_context *ctx = etna_context(pctx);
    struct etna_screen *screen = ctx->screen;
 
-   mtx_lock(&screen->lock);
+   mtx_lock(&ctx->lock);
    if (ctx->used_resources_read) {
 
       /*
@@ -94,7 +94,7 @@ etna_context_destroy(struct pipe_context *pctx)
       _mesa_set_destroy(ctx->used_resources_write, NULL);
 
    }
-   mtx_unlock(&screen->lock);
+   mtx_unlock(&ctx->lock);
 
    if (ctx->dummy_rt)
       etna_bo_del(ctx->dummy_rt);
@@ -118,6 +118,8 @@ etna_context_destroy(struct pipe_context *pctx)
    if (ctx->in_fence_fd != -1)
       close(ctx->in_fence_fd);
 
+   mtx_destroy(&ctx->lock);
+
    FREE(pctx);
 }
 
@@ -265,6 +267,8 @@ etna_draw_vbo(struct pipe_context *pctx, const struct pipe_draw_info *info)
    if (!etna_state_update(ctx))
       return;
 
+   mtx_lock(&ctx->lock);
+
    /*
     * Figure out the buffers/features we need:
     */
@@ -339,6 +343,7 @@ etna_draw_vbo(struct pipe_context *pctx, const struct pipe_draw_info *info)
        * draw op has caused the hang. */
       etna_stall(ctx->stream, SYNC_RECIPIENT_FE, SYNC_RECIPIENT_PE);
    }
+   mtx_unlock(&ctx->lock);
 
    if (DBG_ENABLED(ETNA_DBG_FLUSH_ALL))
       pctx->flush(pctx, NULL, 0);
@@ -414,7 +419,7 @@ etna_flush(struct pipe_context *pctx, struct pipe_fence_handle **fence,
    struct etna_screen *screen = ctx->screen;
    int out_fence_fd = -1;
 
-   mtx_lock(&screen->lock);
+   mtx_lock(&ctx->lock);
 
    list_for_each_entry(struct etna_hw_query, hq, &ctx->active_hw_queries, node)
       etna_hw_query_suspend(hq, ctx);
@@ -452,9 +457,8 @@ etna_flush(struct pipe_context *pctx, struct pipe_fence_handle **fence,
    }
    _mesa_set_clear(ctx->used_resources_write, NULL);
 
-   mtx_unlock(&screen->lock);
-
    etna_reset_gpu_state(ctx);
+   mtx_unlock(&ctx->lock);
 }
 
 static void
@@ -512,6 +516,8 @@ etna_context_create(struct pipe_screen *pscreen, void *priv, unsigned flags)
    if (!ctx->used_resources_write)
       goto fail;
 
+   mtx_init(&ctx->lock, mtx_recursive);
+
    /* context ctxate setup */
    ctx->specs = screen->specs;
    ctx->screen = screen;

src/gallium/drivers/etnaviv/etnaviv_context.h

@@ -194,6 +194,8 @@ struct etna_context {
    /* set of resources used by currently-unsubmitted renders */
    struct set *used_resources_read;
    struct set *used_resources_write;
+
+   mtx_t lock;
 };
 
 static inline struct etna_context *

src/gallium/drivers/etnaviv/etnaviv_resource.c

@@ -645,7 +645,7 @@ etna_resource_used(struct etna_context *ctx, struct pipe_resource *prsc,
    if (!prsc)
       return;
 
-   mtx_lock(&screen->lock);
+   mtx_lock(&ctx->lock);
 
    rsc = etna_resource(prsc);
 
@@ -682,7 +682,7 @@ etna_resource_used(struct etna_context *ctx, struct pipe_resource *prsc,
       _mesa_set_add(rsc->pending_ctx, ctx);
    }
 
-   mtx_unlock(&screen->lock);
+   mtx_unlock(&ctx->lock);
 }
 
 bool

src/gallium/drivers/etnaviv/etnaviv_rs.c

@@ -392,6 +392,7 @@ etna_clear_rs(struct pipe_context *pctx, unsigned buffers,
            const union pipe_color_union *color, double depth, unsigned stencil)
 {
    struct etna_context *ctx = etna_context(pctx);
+   mtx_lock(&ctx->lock);
 
    /* Flush color and depth cache before clearing anything.
     * This is especially important when coming from another surface, as
@@ -437,6 +438,7 @@ etna_clear_rs(struct pipe_context *pctx, unsigned buffers,
       etna_blit_clear_zs_rs(pctx, ctx->framebuffer_s.zsbuf, buffers, depth, stencil);
 
    etna_stall(ctx->stream, SYNC_RECIPIENT_RA, SYNC_RECIPIENT_PE);
+   mtx_unlock(&ctx->lock);
 }
 
 static bool
@@ -647,6 +649,8 @@ etna_try_rs_blit(struct pipe_context *pctx,
        width & (w_align - 1) || height & (h_align - 1))
       goto manual;
 
+   mtx_lock(&ctx->lock);
+
    /* Always flush color and depth cache together before resolving. This works
     * around artifacts that appear in some cases when scanning out a texture
     * directly after it has been rendered to, such as rendering an animated web
@@ -736,6 +740,7 @@ etna_try_rs_blit(struct pipe_context *pctx,
    dst->seqno++;
    dst_lev->ts_valid = false;
    ctx->dirty |= ETNA_DIRTY_DERIVE_TS;
+   mtx_unlock(&ctx->lock);
 
    return true;
 

src/gallium/drivers/etnaviv/etnaviv_screen.c

@@ -84,8 +84,6 @@ etna_screen_destroy(struct pipe_screen *pscreen)
 {
    struct etna_screen *screen = etna_screen(pscreen);
 
-   mtx_destroy(&screen->lock);
-
    if (screen->perfmon)
       etna_perfmon_del(screen->perfmon);
 
@@ -956,8 +954,6 @@ etna_screen_create(struct etna_device *dev, struct etna_gpu *gpu,
    if (screen->drm_version >= ETNA_DRM_VERSION_PERFMON)
       etna_pm_query_setup(screen);
 
-   mtx_init(&screen->lock, mtx_recursive);
-
    return pscreen;
 
 fail:

src/gallium/drivers/etnaviv/etnaviv_screen.h

@@ -85,8 +85,6 @@ struct etna_screen {
 
    uint32_t drm_version;
 
-   mtx_t lock;
-
    nir_shader_compiler_options options;
 };
 

src/gallium/drivers/etnaviv/etnaviv_texture.c

@@ -310,7 +310,9 @@ etna_texture_barrier(struct pipe_context *pctx, unsigned flags)
    struct etna_context *ctx = etna_context(pctx);
    /* clear color and texture cache to make sure that texture unit reads
     * what has been written */
+   mtx_lock(&ctx->lock);
    etna_set_state(ctx->stream, VIVS_GL_FLUSH_CACHE, VIVS_GL_FLUSH_CACHE_COLOR | VIVS_GL_FLUSH_CACHE_TEXTURE);
+   mtx_unlock(&ctx->lock);
 }
 
 uint32_t

src/gallium/drivers/etnaviv/etnaviv_transfer.c

@@ -355,7 +355,7 @@ etna_transfer_map(struct pipe_context *pctx, struct pipe_resource *prsc,
        * current GPU usage (reads must wait for GPU writes, writes must have
        * exclusive access to the buffer).
        */
-      mtx_lock(&screen->lock);
+      mtx_lock(&ctx->lock);
 
       if ((trans->rsc && (etna_resource(trans->rsc)->status & ETNA_PENDING_WRITE)) ||
           (!trans->rsc &&
@@ -369,7 +369,7 @@ etna_transfer_map(struct pipe_context *pctx, struct pipe_resource *prsc,
          }
       }
 
-      mtx_unlock(&screen->lock);
+      mtx_unlock(&ctx->lock);
 
       if (usage & PIPE_TRANSFER_READ)
          prep_flags |= DRM_ETNA_PREP_READ;