19952f691SThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-only */ 275471687STerje Bergstrom /* 375471687STerje Bergstrom * Tegra host1x Syncpoints 475471687STerje Bergstrom * 575471687STerje Bergstrom * Copyright (c) 2010-2013, NVIDIA Corporation. 675471687STerje Bergstrom */ 775471687STerje Bergstrom 875471687STerje Bergstrom #ifndef __HOST1X_SYNCPT_H 975471687STerje Bergstrom #define __HOST1X_SYNCPT_H 1075471687STerje Bergstrom 1175471687STerje Bergstrom #include <linux/atomic.h> 1235d747a8SThierry Reding #include <linux/host1x.h> 1375471687STerje Bergstrom #include <linux/kernel.h> 142aed4f5aSMikko Perttunen #include <linux/kref.h> 1575471687STerje Bergstrom #include <linux/sched.h> 1675471687STerje Bergstrom 17*625d4ffbSMikko Perttunen #include "fence.h" 187ede0b0bSTerje Bergstrom #include "intr.h" 197ede0b0bSTerje Bergstrom 2075471687STerje Bergstrom struct host1x; 2175471687STerje Bergstrom 226579324aSTerje Bergstrom /* Reserved for replacing an expired wait with a NOP */ 236579324aSTerje Bergstrom #define HOST1X_SYNCPT_RESERVED 0 246579324aSTerje Bergstrom 25f5a954feSArto Merilainen struct host1x_syncpt_base { 26f5a954feSArto Merilainen unsigned int id; 27f5a954feSArto Merilainen bool requested; 28f5a954feSArto Merilainen }; 29f5a954feSArto Merilainen 3075471687STerje Bergstrom struct host1x_syncpt { 312aed4f5aSMikko Perttunen struct kref ref; 322aed4f5aSMikko Perttunen 335c0d8d38SThierry Reding unsigned int id; 3475471687STerje Bergstrom atomic_t min_val; 3575471687STerje Bergstrom atomic_t max_val; 3675471687STerje Bergstrom u32 base_val; 3775471687STerje Bergstrom const char *name; 38ece66891SArto Merilainen bool client_managed; 3975471687STerje Bergstrom struct host1x *host; 40f5a954feSArto Merilainen struct host1x_syncpt_base *base; 417ede0b0bSTerje Bergstrom 427ede0b0bSTerje Bergstrom /* interrupt data */ 43*625d4ffbSMikko Perttunen struct host1x_fence_list fences; 44c78f837aSMikko Perttunen 45c78f837aSMikko Perttunen /* 46c78f837aSMikko Perttunen * If a submission incrementing this syncpoint fails, lock it so that 47c78f837aSMikko Perttunen * further submission cannot be made until application has handled the 48c78f837aSMikko Perttunen * failure. 49c78f837aSMikko Perttunen */ 50c78f837aSMikko Perttunen bool locked; 5175471687STerje Bergstrom }; 5275471687STerje Bergstrom 5375471687STerje Bergstrom /* Initialize sync point array */ 5475471687STerje Bergstrom int host1x_syncpt_init(struct host1x *host); 5575471687STerje Bergstrom 5675471687STerje Bergstrom /* Free sync point array */ 5775471687STerje Bergstrom void host1x_syncpt_deinit(struct host1x *host); 5875471687STerje Bergstrom 5975471687STerje Bergstrom /* Return number of sync point supported. */ 6014c95fc8SThierry Reding unsigned int host1x_syncpt_nb_pts(struct host1x *host); 6175471687STerje Bergstrom 6275471687STerje Bergstrom /* Return number of wait bases supported. */ 6314c95fc8SThierry Reding unsigned int host1x_syncpt_nb_bases(struct host1x *host); 6475471687STerje Bergstrom 6575471687STerje Bergstrom /* Return number of mlocks supported. */ 6614c95fc8SThierry Reding unsigned int host1x_syncpt_nb_mlocks(struct host1x *host); 6775471687STerje Bergstrom 6875471687STerje Bergstrom /* 6975471687STerje Bergstrom * Check sync point sanity. If max is larger than min, there have too many 7075471687STerje Bergstrom * sync point increments. 7175471687STerje Bergstrom * 7275471687STerje Bergstrom * Client managed sync point are not tracked. 7375471687STerje Bergstrom * */ host1x_syncpt_check_max(struct host1x_syncpt * sp,u32 real)7475471687STerje Bergstromstatic inline bool host1x_syncpt_check_max(struct host1x_syncpt *sp, u32 real) 7575471687STerje Bergstrom { 7675471687STerje Bergstrom u32 max; 7775471687STerje Bergstrom if (sp->client_managed) 7875471687STerje Bergstrom return true; 7975471687STerje Bergstrom max = host1x_syncpt_read_max(sp); 8075471687STerje Bergstrom return (s32)(max - real) >= 0; 8175471687STerje Bergstrom } 8275471687STerje Bergstrom 8375471687STerje Bergstrom /* Return true if sync point is client managed. */ host1x_syncpt_client_managed(struct host1x_syncpt * sp)84ece66891SArto Merilainenstatic inline bool host1x_syncpt_client_managed(struct host1x_syncpt *sp) 8575471687STerje Bergstrom { 8675471687STerje Bergstrom return sp->client_managed; 8775471687STerje Bergstrom } 8875471687STerje Bergstrom 8975471687STerje Bergstrom /* 9075471687STerje Bergstrom * Returns true if syncpoint min == max, which means that there are no 9175471687STerje Bergstrom * outstanding operations. 9275471687STerje Bergstrom */ host1x_syncpt_idle(struct host1x_syncpt * sp)9375471687STerje Bergstromstatic inline bool host1x_syncpt_idle(struct host1x_syncpt *sp) 9475471687STerje Bergstrom { 9575471687STerje Bergstrom int min, max; 9675471687STerje Bergstrom smp_rmb(); 9775471687STerje Bergstrom min = atomic_read(&sp->min_val); 9875471687STerje Bergstrom max = atomic_read(&sp->max_val); 9975471687STerje Bergstrom return (min == max); 10075471687STerje Bergstrom } 10175471687STerje Bergstrom 10275471687STerje Bergstrom /* Load current value from hardware to the shadow register. */ 10375471687STerje Bergstrom u32 host1x_syncpt_load(struct host1x_syncpt *sp); 10475471687STerje Bergstrom 1057ede0b0bSTerje Bergstrom /* Check if the given syncpoint value has already passed */ 1067ede0b0bSTerje Bergstrom bool host1x_syncpt_is_expired(struct host1x_syncpt *sp, u32 thresh); 1077ede0b0bSTerje Bergstrom 10875471687STerje Bergstrom /* Save host1x sync point state into shadow registers. */ 10975471687STerje Bergstrom void host1x_syncpt_save(struct host1x *host); 11075471687STerje Bergstrom 11175471687STerje Bergstrom /* Reset host1x sync point state from shadow registers. */ 11275471687STerje Bergstrom void host1x_syncpt_restore(struct host1x *host); 11375471687STerje Bergstrom 11475471687STerje Bergstrom /* Read current wait base value into shadow register and return it. */ 11575471687STerje Bergstrom u32 host1x_syncpt_load_wait_base(struct host1x_syncpt *sp); 11675471687STerje Bergstrom 11775471687STerje Bergstrom /* Indicate future operations by incrementing the sync point max. */ 11875471687STerje Bergstrom u32 host1x_syncpt_incr_max(struct host1x_syncpt *sp, u32 incrs); 11975471687STerje Bergstrom 12075471687STerje Bergstrom /* Check if sync point id is valid. */ host1x_syncpt_is_valid(struct host1x_syncpt * sp)12175471687STerje Bergstromstatic inline int host1x_syncpt_is_valid(struct host1x_syncpt *sp) 12275471687STerje Bergstrom { 12375471687STerje Bergstrom return sp->id < host1x_syncpt_nb_pts(sp->host); 12475471687STerje Bergstrom } 12575471687STerje Bergstrom host1x_syncpt_set_locked(struct host1x_syncpt * sp)126c78f837aSMikko Perttunenstatic inline void host1x_syncpt_set_locked(struct host1x_syncpt *sp) 127c78f837aSMikko Perttunen { 128c78f837aSMikko Perttunen sp->locked = true; 129c78f837aSMikko Perttunen } 130c78f837aSMikko Perttunen 13175471687STerje Bergstrom #endif 132