Signed-off-by: Qiang Yu yuq825@gmail.com --- drivers/gpu/drm/lima/lima_ctx.c | 143 ++++++++++++++++++++++++++++++++ drivers/gpu/drm/lima/lima_ctx.h | 51 ++++++++++++ 2 files changed, 194 insertions(+) create mode 100644 drivers/gpu/drm/lima/lima_ctx.c create mode 100644 drivers/gpu/drm/lima/lima_ctx.h
diff --git a/drivers/gpu/drm/lima/lima_ctx.c b/drivers/gpu/drm/lima/lima_ctx.c new file mode 100644 index 000000000000..7243861760b4 --- /dev/null +++ b/drivers/gpu/drm/lima/lima_ctx.c @@ -0,0 +1,143 @@ +/* + * Copyright (C) 2017-2018 Lima Project + * + * 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 <linux/slab.h> + +#include "lima_device.h" +#include "lima_ctx.h" + +int lima_ctx_create(struct lima_device *dev, struct lima_ctx_mgr *mgr, u32 *id) +{ + struct lima_ctx *ctx; + int i, err; + + ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + ctx->dev = dev; + kref_init(&ctx->refcnt); + + for (i = 0; i < lima_pipe_num; i++) { + err = lima_sched_context_init(dev->pipe + i, ctx->context + i, &ctx->guilty); + if (err) + goto err_out0; + } + + idr_preload(GFP_KERNEL); + spin_lock(&mgr->lock); + err = idr_alloc(&mgr->handles, ctx, 1, 0, GFP_ATOMIC); + spin_unlock(&mgr->lock); + idr_preload_end(); + if (err < 0) + goto err_out0; + + *id = err; + return 0; + +err_out0: + for (i--; i >= 0; i--) + lima_sched_context_fini(dev->pipe + i, ctx->context + i); + kfree(ctx); + return err; +} + +static void lima_ctx_do_release(struct kref *ref) +{ + struct lima_ctx *ctx = container_of(ref, struct lima_ctx, refcnt); + int i; + + for (i = 0; i < lima_pipe_num; i++) + lima_sched_context_fini(ctx->dev->pipe + i, ctx->context + i); + kfree(ctx); +} + +int lima_ctx_free(struct lima_ctx_mgr *mgr, u32 id) +{ + struct lima_ctx *ctx; + + spin_lock(&mgr->lock); + ctx = idr_remove(&mgr->handles, id); + spin_unlock(&mgr->lock); + + if (ctx) { + kref_put(&ctx->refcnt, lima_ctx_do_release); + return 0; + } + return -EINVAL; +} + +struct lima_ctx *lima_ctx_get(struct lima_ctx_mgr *mgr, u32 id) +{ + struct lima_ctx *ctx; + + spin_lock(&mgr->lock); + ctx = idr_find(&mgr->handles, id); + if (ctx) + kref_get(&ctx->refcnt); + spin_unlock(&mgr->lock); + return ctx; +} + +void lima_ctx_put(struct lima_ctx *ctx) +{ + kref_put(&ctx->refcnt, lima_ctx_do_release); +} + +void lima_ctx_mgr_init(struct lima_ctx_mgr *mgr) +{ + spin_lock_init(&mgr->lock); + idr_init(&mgr->handles); +} + +void lima_ctx_mgr_fini(struct lima_ctx_mgr *mgr) +{ + struct lima_ctx *ctx; + struct idr *idp; + uint32_t id; + + idp = &mgr->handles; + + idr_for_each_entry(idp, ctx, id) { + kref_put(&ctx->refcnt, lima_ctx_do_release); + } + + idr_destroy(&mgr->handles); +} + +struct dma_fence *lima_ctx_get_native_fence(struct lima_ctx_mgr *mgr, + u32 ctx, u32 pipe, u32 seq) +{ + struct lima_ctx *c; + struct dma_fence *ret; + + if (pipe >= lima_pipe_num) + return ERR_PTR(-EINVAL); + + c = lima_ctx_get(mgr, ctx); + if (!c) + return ERR_PTR(-ENOENT); + + ret = lima_sched_context_get_fence(c->context + pipe, seq); + + lima_ctx_put(c); + return ret; +} diff --git a/drivers/gpu/drm/lima/lima_ctx.h b/drivers/gpu/drm/lima/lima_ctx.h new file mode 100644 index 000000000000..591f64532772 --- /dev/null +++ b/drivers/gpu/drm/lima/lima_ctx.h @@ -0,0 +1,51 @@ +/* + * Copyright (C) 2017-2018 Lima Project + * + * 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. + */ +#ifndef __LIMA_CTX_H__ +#define __LIMA_CTX_H__ + +#include <linux/idr.h> + +#include "lima_device.h" + +struct lima_ctx { + struct kref refcnt; + struct lima_device *dev; + struct lima_sched_context context[lima_pipe_num]; + atomic_t guilty; +}; + +struct lima_ctx_mgr { + spinlock_t lock; + struct idr handles; +}; + +int lima_ctx_create(struct lima_device *dev, struct lima_ctx_mgr *mgr, u32 *id); +int lima_ctx_free(struct lima_ctx_mgr *mgr, u32 id); +struct lima_ctx *lima_ctx_get(struct lima_ctx_mgr *mgr, u32 id); +void lima_ctx_put(struct lima_ctx *ctx); +void lima_ctx_mgr_init(struct lima_ctx_mgr *mgr); +void lima_ctx_mgr_fini(struct lima_ctx_mgr *mgr); + +struct dma_fence *lima_ctx_get_native_fence(struct lima_ctx_mgr *mgr, + u32 ctx, u32 pipe, u32 seq); + +#endif