Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Tegra host1x Syncpoints
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (c) 2010-2015, NVIDIA Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <trace/events/host1x.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include "syncpt.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include "dev.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include "intr.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include "debug.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #define SYNCPT_CHECK_PERIOD (2 * HZ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #define MAX_STUCK_CHECK_COUNT 15
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) static struct host1x_syncpt_base *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) host1x_syncpt_base_request(struct host1x *host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	struct host1x_syncpt_base *bases = host->bases;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	for (i = 0; i < host->info->nb_bases; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 		if (!bases[i].requested)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	if (i >= host->info->nb_bases)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	bases[i].requested = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	return &bases[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) static void host1x_syncpt_base_free(struct host1x_syncpt_base *base)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	if (base)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 		base->requested = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) static struct host1x_syncpt *host1x_syncpt_alloc(struct host1x *host,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 						 struct host1x_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 						 unsigned long flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	struct host1x_syncpt *sp = host->syncpt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	mutex_lock(&host->syncpt_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	for (i = 0; i < host->info->nb_pts && sp->name; i++, sp++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 		;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	if (i >= host->info->nb_pts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 		goto unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	if (flags & HOST1X_SYNCPT_HAS_BASE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 		sp->base = host1x_syncpt_base_request(host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 		if (!sp->base)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 			goto unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	name = kasprintf(GFP_KERNEL, "%02u-%s", sp->id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 			 client ? dev_name(client->dev) : NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	if (!name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 		goto free_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	sp->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	sp->name = name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	if (flags & HOST1X_SYNCPT_CLIENT_MANAGED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 		sp->client_managed = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 		sp->client_managed = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	mutex_unlock(&host->syncpt_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	return sp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) free_base:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	host1x_syncpt_base_free(sp->base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	sp->base = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	mutex_unlock(&host->syncpt_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92)  * host1x_syncpt_id() - retrieve syncpoint ID
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93)  * @sp: host1x syncpoint
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95)  * Given a pointer to a struct host1x_syncpt, retrieves its ID. This ID is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96)  * often used as a value to program into registers that control how hardware
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97)  * blocks interact with syncpoints.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) u32 host1x_syncpt_id(struct host1x_syncpt *sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	return sp->id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) EXPORT_SYMBOL(host1x_syncpt_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)  * host1x_syncpt_incr_max() - update the value sent to hardware
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)  * @sp: host1x syncpoint
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)  * @incrs: number of increments
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) u32 host1x_syncpt_incr_max(struct host1x_syncpt *sp, u32 incrs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	return (u32)atomic_add_return(incrs, &sp->max_val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) EXPORT_SYMBOL(host1x_syncpt_incr_max);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)  /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)  * Write cached syncpoint and waitbase values to hardware.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) void host1x_syncpt_restore(struct host1x *host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	struct host1x_syncpt *sp_base = host->syncpt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	for (i = 0; i < host1x_syncpt_nb_pts(host); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		host1x_hw_syncpt_restore(host, sp_base + i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	for (i = 0; i < host1x_syncpt_nb_bases(host); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 		host1x_hw_syncpt_restore_wait_base(host, sp_base + i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	wmb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)  * Update the cached syncpoint and waitbase values by reading them
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)  * from the registers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)   */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) void host1x_syncpt_save(struct host1x *host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	struct host1x_syncpt *sp_base = host->syncpt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	for (i = 0; i < host1x_syncpt_nb_pts(host); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		if (host1x_syncpt_client_managed(sp_base + i))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 			host1x_hw_syncpt_load(host, sp_base + i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 			WARN_ON(!host1x_syncpt_idle(sp_base + i));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	for (i = 0; i < host1x_syncpt_nb_bases(host); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 		host1x_hw_syncpt_load_wait_base(host, sp_base + i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)  * Updates the cached syncpoint value by reading a new value from the hardware
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)  * register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) u32 host1x_syncpt_load(struct host1x_syncpt *sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	u32 val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	val = host1x_hw_syncpt_load(sp->host, sp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	trace_host1x_syncpt_load_min(sp->id, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	return val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)  * Get the current syncpoint base
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) u32 host1x_syncpt_load_wait_base(struct host1x_syncpt *sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	host1x_hw_syncpt_load_wait_base(sp->host, sp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	return sp->base_val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)  * host1x_syncpt_incr() - increment syncpoint value from CPU, updating cache
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)  * @sp: host1x syncpoint
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) int host1x_syncpt_incr(struct host1x_syncpt *sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	return host1x_hw_syncpt_cpu_incr(sp->host, sp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) EXPORT_SYMBOL(host1x_syncpt_incr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)  * Updated sync point form hardware, and returns true if syncpoint is expired,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)  * false if we may need to wait
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) static bool syncpt_load_min_is_expired(struct host1x_syncpt *sp, u32 thresh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	host1x_hw_syncpt_load(sp->host, sp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	return host1x_syncpt_is_expired(sp, thresh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)  * host1x_syncpt_wait() - wait for a syncpoint to reach a given value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)  * @sp: host1x syncpoint
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)  * @thresh: threshold
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)  * @timeout: maximum time to wait for the syncpoint to reach the given value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)  * @value: return location for the syncpoint value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) int host1x_syncpt_wait(struct host1x_syncpt *sp, u32 thresh, long timeout,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 		       u32 *value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	void *ref;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	struct host1x_waitlist *waiter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	int err = 0, check_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	u32 val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	if (value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		*value = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	/* first check cache */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	if (host1x_syncpt_is_expired(sp, thresh)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		if (value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 			*value = host1x_syncpt_load(sp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	/* try to read from register */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	val = host1x_hw_syncpt_load(sp->host, sp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	if (host1x_syncpt_is_expired(sp, thresh)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 		if (value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 			*value = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 		goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	if (!timeout) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 		err = -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 		goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	/* allocate a waiter */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	waiter = kzalloc(sizeof(*waiter), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	if (!waiter) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 		err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 		goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	/* schedule a wakeup when the syncpoint value is reached */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	err = host1x_intr_add_action(sp->host, sp, thresh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 				     HOST1X_INTR_ACTION_WAKEUP_INTERRUPTIBLE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 				     &wq, waiter, &ref);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 		goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	err = -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	/* Caller-specified timeout may be impractically low */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	if (timeout < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 		timeout = LONG_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	/* wait for the syncpoint, or timeout, or signal */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	while (timeout) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 		long check = min_t(long, SYNCPT_CHECK_PERIOD, timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 		int remain;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 		remain = wait_event_interruptible_timeout(wq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 				syncpt_load_min_is_expired(sp, thresh),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 				check);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		if (remain > 0 || host1x_syncpt_is_expired(sp, thresh)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 			if (value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 				*value = host1x_syncpt_load(sp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 			err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 		if (remain < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 			err = remain;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 		timeout -= check;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 		if (timeout && check_count <= MAX_STUCK_CHECK_COUNT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 			dev_warn(sp->host->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 				"%s: syncpoint id %u (%s) stuck waiting %d, timeout=%ld\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 				 current->comm, sp->id, sp->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 				 thresh, timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 			host1x_debug_dump_syncpts(sp->host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 			if (check_count == MAX_STUCK_CHECK_COUNT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 				host1x_debug_dump(sp->host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 			check_count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	host1x_intr_put_ref(sp->host, sp->id, ref);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) EXPORT_SYMBOL(host1x_syncpt_wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)  * Returns true if syncpoint is expired, false if we may need to wait
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) bool host1x_syncpt_is_expired(struct host1x_syncpt *sp, u32 thresh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	u32 current_val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	u32 future_val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	smp_rmb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	current_val = (u32)atomic_read(&sp->min_val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 	future_val = (u32)atomic_read(&sp->max_val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	/* Note the use of unsigned arithmetic here (mod 1<<32).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	 * c = current_val = min_val	= the current value of the syncpoint.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	 * t = thresh			= the value we are checking
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	 * f = future_val  = max_val	= the value c will reach when all
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	 *				  outstanding increments have completed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	 * Note that c always chases f until it reaches f.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	 * Dtf = (f - t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	 * Dtc = (c - t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	 *  Consider all cases:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 	 *	A) .....c..t..f.....	Dtf < Dtc	need to wait
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	 *	B) .....c.....f..t..	Dtf > Dtc	expired
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	 *	C) ..t..c.....f.....	Dtf > Dtc	expired	   (Dct very large)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	 *  Any case where f==c: always expired (for any t).	Dtf == Dcf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 	 *  Any case where t==c: always expired (for any f).	Dtf >= Dtc (because Dtc==0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	 *  Any case where t==f!=c: always wait.		Dtf <  Dtc (because Dtf==0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 	 *							Dtc!=0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	 *  Other cases:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	 *	A) .....t..f..c.....	Dtf < Dtc	need to wait
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	 *	A) .....f..c..t.....	Dtf < Dtc	need to wait
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 	 *	A) .....f..t..c.....	Dtf > Dtc	expired
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	 *   So:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 	 *	   Dtf >= Dtc implies EXPIRED	(return true)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	 *	   Dtf <  Dtc implies WAIT	(return false)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	 * Note: If t is expired then we *cannot* wait on it. We would wait
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	 * forever (hang the system).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	 * Note: do NOT get clever and remove the -thresh from both sides. It
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 	 * is NOT the same.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 	 * If future valueis zero, we have a client managed sync point. In that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 	 * case we do a direct comparison.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 	if (!host1x_syncpt_client_managed(sp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 		return future_val - thresh >= current_val - thresh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 		return (s32)(current_val - thresh) >= 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) int host1x_syncpt_init(struct host1x *host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 	struct host1x_syncpt_base *bases;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 	struct host1x_syncpt *syncpt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 	unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 	syncpt = devm_kcalloc(host->dev, host->info->nb_pts, sizeof(*syncpt),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 			      GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 	if (!syncpt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 	bases = devm_kcalloc(host->dev, host->info->nb_bases, sizeof(*bases),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 			     GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 	if (!bases)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 	for (i = 0; i < host->info->nb_pts; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 		syncpt[i].id = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 		syncpt[i].host = host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 		 * Unassign syncpt from channels for purposes of Tegra186
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 		 * syncpoint protection. This prevents any channel from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 		 * accessing it until it is reassigned.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) 		host1x_hw_syncpt_assign_to_channel(host, &syncpt[i], NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 	for (i = 0; i < host->info->nb_bases; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 		bases[i].id = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 	mutex_init(&host->syncpt_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 	host->syncpt = syncpt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 	host->bases = bases;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 	host1x_syncpt_restore(host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 	host1x_hw_syncpt_enable_protection(host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) 	/* Allocate sync point to use for clearing waits for expired fences */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 	host->nop_sp = host1x_syncpt_alloc(host, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 	if (!host->nop_sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412)  * host1x_syncpt_request() - request a syncpoint
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413)  * @client: client requesting the syncpoint
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414)  * @flags: flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416)  * host1x client drivers can use this function to allocate a syncpoint for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417)  * subsequent use. A syncpoint returned by this function will be reserved for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418)  * use by the client exclusively. When no longer using a syncpoint, a host1x
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419)  * client driver needs to release it using host1x_syncpt_free().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) struct host1x_syncpt *host1x_syncpt_request(struct host1x_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) 					    unsigned long flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) 	struct host1x *host = dev_get_drvdata(client->host->parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) 	return host1x_syncpt_alloc(host, client, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) EXPORT_SYMBOL(host1x_syncpt_request);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431)  * host1x_syncpt_free() - free a requested syncpoint
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432)  * @sp: host1x syncpoint
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434)  * Release a syncpoint previously allocated using host1x_syncpt_request(). A
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435)  * host1x client driver should call this when the syncpoint is no longer in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436)  * use. Note that client drivers must ensure that the syncpoint doesn't remain
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437)  * under the control of hardware after calling this function, otherwise two
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438)  * clients may end up trying to access the same syncpoint concurrently.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) void host1x_syncpt_free(struct host1x_syncpt *sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) 	if (!sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) 	mutex_lock(&sp->host->syncpt_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) 	host1x_syncpt_base_free(sp->base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) 	kfree(sp->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) 	sp->base = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) 	sp->client = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) 	sp->name = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) 	sp->client_managed = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) 	mutex_unlock(&sp->host->syncpt_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) EXPORT_SYMBOL(host1x_syncpt_free);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) void host1x_syncpt_deinit(struct host1x *host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) 	struct host1x_syncpt *sp = host->syncpt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) 	unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) 	for (i = 0; i < host->info->nb_pts; i++, sp++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) 		kfree(sp->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468)  * host1x_syncpt_read_max() - read maximum syncpoint value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469)  * @sp: host1x syncpoint
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471)  * The maximum syncpoint value indicates how many operations there are in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472)  * queue, either in channel or in a software thread.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) u32 host1x_syncpt_read_max(struct host1x_syncpt *sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) 	smp_rmb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) 	return (u32)atomic_read(&sp->max_val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) EXPORT_SYMBOL(host1x_syncpt_read_max);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)  * host1x_syncpt_read_min() - read minimum syncpoint value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484)  * @sp: host1x syncpoint
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486)  * The minimum syncpoint value is a shadow of the current sync point value in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487)  * hardware.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) u32 host1x_syncpt_read_min(struct host1x_syncpt *sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) 	smp_rmb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) 	return (u32)atomic_read(&sp->min_val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) EXPORT_SYMBOL(host1x_syncpt_read_min);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498)  * host1x_syncpt_read() - read the current syncpoint value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499)  * @sp: host1x syncpoint
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) u32 host1x_syncpt_read(struct host1x_syncpt *sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) 	return host1x_syncpt_load(sp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) EXPORT_SYMBOL(host1x_syncpt_read);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) unsigned int host1x_syncpt_nb_pts(struct host1x *host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) 	return host->info->nb_pts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) unsigned int host1x_syncpt_nb_bases(struct host1x *host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) 	return host->info->nb_bases;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) unsigned int host1x_syncpt_nb_mlocks(struct host1x *host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) 	return host->info->nb_mlocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523)  * host1x_syncpt_get() - obtain a syncpoint by ID
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524)  * @host: host1x controller
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525)  * @id: syncpoint ID
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) struct host1x_syncpt *host1x_syncpt_get(struct host1x *host, unsigned int id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) 	if (id >= host->info->nb_pts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) 	return host->syncpt + id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) EXPORT_SYMBOL(host1x_syncpt_get);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537)  * host1x_syncpt_get_base() - obtain the wait base associated with a syncpoint
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538)  * @sp: host1x syncpoint
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) struct host1x_syncpt_base *host1x_syncpt_get_base(struct host1x_syncpt *sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) 	return sp ? sp->base : NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) EXPORT_SYMBOL(host1x_syncpt_get_base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547)  * host1x_syncpt_base_id() - retrieve the ID of a syncpoint wait base
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548)  * @base: host1x syncpoint wait base
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) u32 host1x_syncpt_base_id(struct host1x_syncpt_base *base)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) 	return base->id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) EXPORT_SYMBOL(host1x_syncpt_base_id);