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      1 /*	$NetBSD: amdgpu_irq_service.c,v 1.2 2021/12/18 23:45:06 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2012-15 Advanced Micro Devices, Inc.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be included in
     14  * all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     22  * OTHER DEALINGS IN THE SOFTWARE.
     23  *
     24  * Authors: AMD
     25  *
     26  */
     27 
     28 #include <sys/cdefs.h>
     29 __KERNEL_RCSID(0, "$NetBSD: amdgpu_irq_service.c,v 1.2 2021/12/18 23:45:06 riastradh Exp $");
     30 
     31 #include <linux/slab.h>
     32 
     33 #include "dm_services.h"
     34 
     35 #include "include/irq_service_interface.h"
     36 #include "include/logger_interface.h"
     37 
     38 #include "dce110/irq_service_dce110.h"
     39 
     40 
     41 #include "dce80/irq_service_dce80.h"
     42 
     43 #include "dce120/irq_service_dce120.h"
     44 
     45 
     46 #if defined(CONFIG_DRM_AMD_DC_DCN)
     47 #include "dcn10/irq_service_dcn10.h"
     48 #endif
     49 
     50 #include "reg_helper.h"
     51 #include "irq_service.h"
     52 
     53 
     54 
     55 #define CTX \
     56 		irq_service->ctx
     57 #define DC_LOGGER \
     58 	irq_service->ctx->logger
     59 
     60 void dal_irq_service_construct(
     61 	struct irq_service *irq_service,
     62 	struct irq_service_init_data *init_data)
     63 {
     64 	if (!init_data || !init_data->ctx) {
     65 		BREAK_TO_DEBUGGER();
     66 		return;
     67 	}
     68 
     69 	irq_service->ctx = init_data->ctx;
     70 }
     71 
     72 void dal_irq_service_destroy(struct irq_service **irq_service)
     73 {
     74 	if (!irq_service || !*irq_service) {
     75 		BREAK_TO_DEBUGGER();
     76 		return;
     77 	}
     78 
     79 	kfree(*irq_service);
     80 
     81 	*irq_service = NULL;
     82 }
     83 
     84 const struct irq_source_info *find_irq_source_info(
     85 	struct irq_service *irq_service,
     86 	enum dc_irq_source source)
     87 {
     88 	if (source >= DAL_IRQ_SOURCES_NUMBER || source < DC_IRQ_SOURCE_INVALID)
     89 		return NULL;
     90 
     91 	return &irq_service->info[source];
     92 }
     93 
     94 void dal_irq_service_set_generic(
     95 	struct irq_service *irq_service,
     96 	const struct irq_source_info *info,
     97 	bool enable)
     98 {
     99 	uint32_t addr = info->enable_reg;
    100 	uint32_t value = dm_read_reg(irq_service->ctx, addr);
    101 
    102 	value = (value & ~info->enable_mask) |
    103 		(info->enable_value[enable ? 0 : 1] & info->enable_mask);
    104 	dm_write_reg(irq_service->ctx, addr, value);
    105 }
    106 
    107 bool dal_irq_service_set(
    108 	struct irq_service *irq_service,
    109 	enum dc_irq_source source,
    110 	bool enable)
    111 {
    112 	const struct irq_source_info *info =
    113 		find_irq_source_info(irq_service, source);
    114 
    115 	if (!info) {
    116 		DC_LOG_ERROR("%s: cannot find irq info table entry for %d\n",
    117 			__func__,
    118 			source);
    119 		return false;
    120 	}
    121 
    122 	dal_irq_service_ack(irq_service, source);
    123 
    124 	if (info->funcs->set)
    125 		return info->funcs->set(irq_service, info, enable);
    126 
    127 	dal_irq_service_set_generic(irq_service, info, enable);
    128 
    129 	return true;
    130 }
    131 
    132 void dal_irq_service_ack_generic(
    133 	struct irq_service *irq_service,
    134 	const struct irq_source_info *info)
    135 {
    136 	uint32_t addr = info->ack_reg;
    137 	uint32_t value = dm_read_reg(irq_service->ctx, addr);
    138 
    139 	value = (value & ~info->ack_mask) |
    140 		(info->ack_value & info->ack_mask);
    141 	dm_write_reg(irq_service->ctx, addr, value);
    142 }
    143 
    144 bool dal_irq_service_ack(
    145 	struct irq_service *irq_service,
    146 	enum dc_irq_source source)
    147 {
    148 	const struct irq_source_info *info =
    149 		find_irq_source_info(irq_service, source);
    150 
    151 	if (!info) {
    152 		DC_LOG_ERROR("%s: cannot find irq info table entry for %d\n",
    153 			__func__,
    154 			source);
    155 		return false;
    156 	}
    157 
    158 	if (info->funcs->ack)
    159 		return info->funcs->ack(irq_service, info);
    160 
    161 	dal_irq_service_ack_generic(irq_service, info);
    162 
    163 	return true;
    164 }
    165 
    166 enum dc_irq_source dal_irq_service_to_irq_source(
    167 		struct irq_service *irq_service,
    168 		uint32_t src_id,
    169 		uint32_t ext_id)
    170 {
    171 	return irq_service->funcs->to_dal_irq_source(
    172 		irq_service,
    173 		src_id,
    174 		ext_id);
    175 }
    176