1// SPDX-License-Identifier: GPL-2.0 OR MIT 2/* Copyright 2018-2019 Qiang Yu <yuq825@gmail.com> */ 3 4#include <linux/pid.h> 5#include <linux/slab.h> 6 7#include "lima_device.h" 8#include "lima_ctx.h" 9 10int lima_ctx_create(struct lima_device *dev, struct lima_ctx_mgr *mgr, u32 *id) 11{ 12 struct lima_ctx *ctx; 13 int i, err; 14 15 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 16 if (!ctx) 17 return -ENOMEM; 18 ctx->dev = dev; 19 kref_init(&ctx->refcnt); 20 21 for (i = 0; i < lima_pipe_num; i++) { 22 err = lima_sched_context_init(dev->pipe + i, ctx->context + i); 23 if (err) 24 goto err_out0; 25 } 26 27 err = xa_alloc(&mgr->handles, id, ctx, xa_limit_32b, GFP_KERNEL); 28 if (err < 0) 29 goto err_out0; 30 31 ctx->pid = task_pid_nr(current); 32 get_task_comm(ctx->pname, current); 33 34 return 0; 35 36err_out0: 37 for (i--; i >= 0; i--) 38 lima_sched_context_fini(dev->pipe + i, ctx->context + i); 39 kfree(ctx); 40 return err; 41} 42 43static void lima_ctx_do_release(struct kref *ref) 44{ 45 struct lima_ctx *ctx = container_of(ref, struct lima_ctx, refcnt); 46 int i; 47 48 for (i = 0; i < lima_pipe_num; i++) 49 lima_sched_context_fini(ctx->dev->pipe + i, ctx->context + i); 50 kfree(ctx); 51} 52 53int lima_ctx_free(struct lima_ctx_mgr *mgr, u32 id) 54{ 55 struct lima_ctx *ctx; 56 int ret = 0; 57 58 mutex_lock(&mgr->lock); 59 ctx = xa_erase(&mgr->handles, id); 60 if (ctx) 61 kref_put(&ctx->refcnt, lima_ctx_do_release); 62 else 63 ret = -EINVAL; 64 mutex_unlock(&mgr->lock); 65 return ret; 66} 67 68struct lima_ctx *lima_ctx_get(struct lima_ctx_mgr *mgr, u32 id) 69{ 70 struct lima_ctx *ctx; 71 72 mutex_lock(&mgr->lock); 73 ctx = xa_load(&mgr->handles, id); 74 if (ctx) 75 kref_get(&ctx->refcnt); 76 mutex_unlock(&mgr->lock); 77 return ctx; 78} 79 80void lima_ctx_put(struct lima_ctx *ctx) 81{ 82 kref_put(&ctx->refcnt, lima_ctx_do_release); 83} 84 85void lima_ctx_mgr_init(struct lima_ctx_mgr *mgr) 86{ 87 mutex_init(&mgr->lock); 88 xa_init_flags(&mgr->handles, XA_FLAGS_ALLOC); 89} 90 91void lima_ctx_mgr_fini(struct lima_ctx_mgr *mgr) 92{ 93 struct lima_ctx *ctx; 94 unsigned long id; 95 96 xa_for_each(&mgr->handles, id, ctx) { 97 kref_put(&ctx->refcnt, lima_ctx_do_release); 98 } 99 100 xa_destroy(&mgr->handles); 101 mutex_destroy(&mgr->lock); 102} 103