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> 1475471687STerje Bergstrom #include <linux/sched.h> 1575471687STerje Bergstrom 167ede0b0bSTerje Bergstrom #include "intr.h" 177ede0b0bSTerje Bergstrom 1875471687STerje Bergstrom struct host1x; 1975471687STerje Bergstrom 206579324aSTerje Bergstrom /* Reserved for replacing an expired wait with a NOP */ 216579324aSTerje Bergstrom #define HOST1X_SYNCPT_RESERVED 0 226579324aSTerje Bergstrom 23f5a954feSArto Merilainen struct host1x_syncpt_base { 24f5a954feSArto Merilainen unsigned int id; 25f5a954feSArto Merilainen bool requested; 26f5a954feSArto Merilainen }; 27f5a954feSArto Merilainen 2875471687STerje Bergstrom struct host1x_syncpt { 295c0d8d38SThierry Reding unsigned int id; 3075471687STerje Bergstrom atomic_t min_val; 3175471687STerje Bergstrom atomic_t max_val; 3275471687STerje Bergstrom u32 base_val; 3375471687STerje Bergstrom const char *name; 34ece66891SArto Merilainen bool client_managed; 3575471687STerje Bergstrom struct host1x *host; 36617dd7ccSThierry Reding struct host1x_client *client; 37f5a954feSArto Merilainen struct host1x_syncpt_base *base; 387ede0b0bSTerje Bergstrom 397ede0b0bSTerje Bergstrom /* interrupt data */ 407ede0b0bSTerje Bergstrom struct host1x_syncpt_intr intr; 4175471687STerje Bergstrom }; 4275471687STerje Bergstrom 4375471687STerje Bergstrom /* Initialize sync point array */ 4475471687STerje Bergstrom int host1x_syncpt_init(struct host1x *host); 4575471687STerje Bergstrom 4675471687STerje Bergstrom /* Free sync point array */ 4775471687STerje Bergstrom void host1x_syncpt_deinit(struct host1x *host); 4875471687STerje Bergstrom 4975471687STerje Bergstrom /* Return number of sync point supported. */ 5014c95fc8SThierry Reding unsigned int host1x_syncpt_nb_pts(struct host1x *host); 5175471687STerje Bergstrom 5275471687STerje Bergstrom /* Return number of wait bases supported. */ 5314c95fc8SThierry Reding unsigned int host1x_syncpt_nb_bases(struct host1x *host); 5475471687STerje Bergstrom 5575471687STerje Bergstrom /* Return number of mlocks supported. */ 5614c95fc8SThierry Reding unsigned int host1x_syncpt_nb_mlocks(struct host1x *host); 5775471687STerje Bergstrom 5875471687STerje Bergstrom /* 5975471687STerje Bergstrom * Check sync point sanity. If max is larger than min, there have too many 6075471687STerje Bergstrom * sync point increments. 6175471687STerje Bergstrom * 6275471687STerje Bergstrom * Client managed sync point are not tracked. 6375471687STerje Bergstrom * */ 6475471687STerje Bergstrom static inline bool host1x_syncpt_check_max(struct host1x_syncpt *sp, u32 real) 6575471687STerje Bergstrom { 6675471687STerje Bergstrom u32 max; 6775471687STerje Bergstrom if (sp->client_managed) 6875471687STerje Bergstrom return true; 6975471687STerje Bergstrom max = host1x_syncpt_read_max(sp); 7075471687STerje Bergstrom return (s32)(max - real) >= 0; 7175471687STerje Bergstrom } 7275471687STerje Bergstrom 7375471687STerje Bergstrom /* Return true if sync point is client managed. */ 74ece66891SArto Merilainen static inline bool host1x_syncpt_client_managed(struct host1x_syncpt *sp) 7575471687STerje Bergstrom { 7675471687STerje Bergstrom return sp->client_managed; 7775471687STerje Bergstrom } 7875471687STerje Bergstrom 7975471687STerje Bergstrom /* 8075471687STerje Bergstrom * Returns true if syncpoint min == max, which means that there are no 8175471687STerje Bergstrom * outstanding operations. 8275471687STerje Bergstrom */ 8375471687STerje Bergstrom static inline bool host1x_syncpt_idle(struct host1x_syncpt *sp) 8475471687STerje Bergstrom { 8575471687STerje Bergstrom int min, max; 8675471687STerje Bergstrom smp_rmb(); 8775471687STerje Bergstrom min = atomic_read(&sp->min_val); 8875471687STerje Bergstrom max = atomic_read(&sp->max_val); 8975471687STerje Bergstrom return (min == max); 9075471687STerje Bergstrom } 9175471687STerje Bergstrom 9275471687STerje Bergstrom /* Load current value from hardware to the shadow register. */ 9375471687STerje Bergstrom u32 host1x_syncpt_load(struct host1x_syncpt *sp); 9475471687STerje Bergstrom 957ede0b0bSTerje Bergstrom /* Check if the given syncpoint value has already passed */ 967ede0b0bSTerje Bergstrom bool host1x_syncpt_is_expired(struct host1x_syncpt *sp, u32 thresh); 977ede0b0bSTerje Bergstrom 9875471687STerje Bergstrom /* Save host1x sync point state into shadow registers. */ 9975471687STerje Bergstrom void host1x_syncpt_save(struct host1x *host); 10075471687STerje Bergstrom 10175471687STerje Bergstrom /* Reset host1x sync point state from shadow registers. */ 10275471687STerje Bergstrom void host1x_syncpt_restore(struct host1x *host); 10375471687STerje Bergstrom 10475471687STerje Bergstrom /* Read current wait base value into shadow register and return it. */ 10575471687STerje Bergstrom u32 host1x_syncpt_load_wait_base(struct host1x_syncpt *sp); 10675471687STerje Bergstrom 10775471687STerje Bergstrom /* Indicate future operations by incrementing the sync point max. */ 10875471687STerje Bergstrom u32 host1x_syncpt_incr_max(struct host1x_syncpt *sp, u32 incrs); 10975471687STerje Bergstrom 11075471687STerje Bergstrom /* Check if sync point id is valid. */ 11175471687STerje Bergstrom static inline int host1x_syncpt_is_valid(struct host1x_syncpt *sp) 11275471687STerje Bergstrom { 11375471687STerje Bergstrom return sp->id < host1x_syncpt_nb_pts(sp->host); 11475471687STerje Bergstrom } 11575471687STerje Bergstrom 11675471687STerje Bergstrom #endif 117