1 // SPDX-License-Identifier: GPL-2.0
14 /* interrupt-level stop callback function. */
17 	struct spu_context *ctx = spu->ctx;  in spufs_stop_callback()
30 			ctx->csa.class_0_pending = spu->class_0_pending;  in spufs_stop_callback()
31 			ctx->csa.class_0_dar = spu->class_0_dar;  in spufs_stop_callback()
34 			ctx->csa.class_1_dsisr = spu->class_1_dsisr;  in spufs_stop_callback()
35 			ctx->csa.class_1_dar = spu->class_1_dar;  in spufs_stop_callback()
45 		wake_up_all(&ctx->stop_wq);  in spufs_stop_callback()
58 	*stat = ctx->ops->status_read(ctx);  in spu_stopped()
62 		 * re-read the register to get the stopped value.  in spu_stopped()
69 	if (test_bit(SPU_SCHED_NOTIFY_ACTIVE, &ctx->sched_flags))  in spu_stopped()
72 	dsisr = ctx->csa.class_1_dsisr;  in spu_stopped()
76 	if (ctx->csa.class_0_pending)  in spu_stopped()
92 	ret = -ENODEV;  in spu_setup_isolated()
104 	mfc_cntl = &ctx->spu->priv2->mfc_control_RW;  in spu_setup_isolated()
107 	 * enter kernel mode */  in spu_setup_isolated()
115 			ret = -EIO;  in spu_setup_isolated()
124 	/* put the SPE in kernel mode to allow access to the loader */  in spu_setup_isolated()
125 	sr1 = spu_mfc_sr1_get(ctx->spu);  in spu_setup_isolated()
127 	spu_mfc_sr1_set(ctx->spu, sr1);  in spu_setup_isolated()
129 	/* start the loader */  in spu_setup_isolated()
130 	ctx->ops->signal1_write(ctx, (unsigned long)isolated_loader >> 32);  in spu_setup_isolated()
131 	ctx->ops->signal2_write(ctx,  in spu_setup_isolated()
134 	ctx->ops->runcntl_write(ctx,  in spu_setup_isolated()
139 	while (((status = ctx->ops->status_read(ctx)) & status_loading) ==  in spu_setup_isolated()
142 			printk(KERN_ERR "%s: timeout waiting for loader\n",  in spu_setup_isolated()
144 			ret = -EIO;  in spu_setup_isolated()
151 		/* If isolated LOAD has failed: run SPU, we will get a stop-and  in spu_setup_isolated()
154 		ctx->ops->runcntl_write(ctx, SPU_RUNCNTL_RUNNABLE);  in spu_setup_isolated()
155 		ret = -EACCES;  in spu_setup_isolated()
161 		pr_debug("%s: SPU fell out of isolated mode?\n", __func__);  in spu_setup_isolated()
162 		ctx->ops->runcntl_write(ctx, SPU_RUNCNTL_STOP);  in spu_setup_isolated()
163 		ret = -EINVAL;  in spu_setup_isolated()
168 	/* Finished accessing the loader. Drop kernel mode */  in spu_setup_isolated()
170 	spu_mfc_sr1_set(ctx->spu, sr1);  in spu_setup_isolated()
187 	if (ctx->flags & SPU_CREATE_NOSCHED) {  in spu_run_init()
188 		if (ctx->state == SPU_STATE_SAVED) {  in spu_run_init()
198 	if (ctx->flags & SPU_CREATE_ISOLATE) {  in spu_run_init()
199 		if (!(ctx->ops->status_read(ctx) & SPU_STATUS_ISOLATED_STATE)) {  in spu_run_init()
207 		 * issue an isolated exit), we need to re-set it here  in spu_run_init()
209 		runcntl = ctx->ops->runcntl_read(ctx) &  in spu_run_init()
221 		ctx->ops->privcntl_write(ctx, privcntl);  in spu_run_init()
222 		ctx->ops->npc_write(ctx, *npc);  in spu_run_init()
225 	ctx->ops->runcntl_write(ctx, runcntl);  in spu_run_init()
227 	if (ctx->flags & SPU_CREATE_NOSCHED) {  in spu_run_init()
231 		if (ctx->state == SPU_STATE_SAVED) {  in spu_run_init()
240 	set_bit(SPU_SCHED_SPU_RUN, &ctx->sched_flags);  in spu_run_init()
251 	*status = ctx->ops->status_read(ctx);  in spu_run_fini()
252 	*npc = ctx->ops->npc_read(ctx);  in spu_run_fini()
255 	clear_bit(SPU_SCHED_SPU_RUN, &ctx->sched_flags);  in spu_run_fini()
260 		ret = -ERESTARTSYS;  in spu_run_fini()
279 	case -ERESTARTSYS:  in spu_handle_restartsys()
280 	case -ERESTARTNOINTR:  in spu_handle_restartsys()
286 		*npc -= 8;  in spu_handle_restartsys()
287 		ret = -ERESTARTSYS;  in spu_handle_restartsys()
289 	case -ERESTARTNOHAND:  in spu_handle_restartsys()
290 	case -ERESTART_RESTARTBLOCK:  in spu_handle_restartsys()
292 		 * Restart block is too hard for now, just return -EINTR  in spu_handle_restartsys()
295 		 * -EINTR from there.  in spu_handle_restartsys()
298 		*spu_ret = -EINTR;  in spu_handle_restartsys()
299 		ret = -ERESTARTSYS;  in spu_handle_restartsys()
318 	npc = ctx->ops->npc_read(ctx) & ~3;  in spu_process_callback()
319 	ls = (void __iomem *)ctx->ops->get_ls(ctx);  in spu_process_callback()
321 	if (ls_pointer > (LS_SIZE - sizeof(s)))  in spu_process_callback()
322 		return -EFAULT;  in spu_process_callback()
327 	spu_ret = -ENOSYS;  in spu_process_callback()
334 		if (spu_ret <= -ERESTARTSYS) {  in spu_process_callback()
337 		mutex_lock(&ctx->state_mutex);  in spu_process_callback()
338 		if (ret == -ERESTARTSYS)  in spu_process_callback()
342 	/* need to re-get the ls, as it may have changed when we released the  in spu_process_callback()
344 	ls = (void __iomem *)ctx->ops->get_ls(ctx);  in spu_process_callback()
348 	ctx->ops->npc_write(ctx, npc);  in spu_process_callback()
349 	ctx->ops->runcntl_write(ctx, SPU_RUNCNTL_RUNNABLE);  in spu_process_callback()
358 	if (mutex_lock_interruptible(&ctx->run_mutex))  in spufs_run_spu()
359 		return -ERESTARTSYS;  in spufs_run_spu()
361 	ctx->event_return = 0;  in spufs_run_spu()
378 		ret = spufs_wait(ctx->stop_wq, spu_stopped(ctx, &status));  in spufs_run_spu()
385 			mutex_lock(&ctx->state_mutex);  in spufs_run_spu()
389 						&ctx->sched_flags))) {  in spufs_run_spu()
412 			ret = -ERESTARTSYS;  in spufs_run_spu()
423 		ctx->stats.libassist++;  in spufs_run_spu()
426 	    ((ret == -ERESTARTSYS) &&  in spufs_run_spu()
433 	/* Note: we don't need to force_sig SIGTRAP on single-step  in spufs_run_spu()
438 		ret = -ERESTARTSYS;  in spufs_run_spu()
443 		ret = -ERESTARTSYS;  in spufs_run_spu()
447 	*event = ctx->event_return;  in spufs_run_spu()
449 	mutex_unlock(&ctx->run_mutex);  in spufs_run_spu()