1 // SPDX-License-Identifier: GPL-2.0-only
3  * AMD Secure Processor driver
5  * Copyright (C) 2017-2018 Advanced Micro Devices, Inc.
22 #include "sev-dev.h"
23 #include "ccp-dev.h"
24 #include "sp-dev.h"
30 MODULE_DESCRIPTION("AMD Secure Processor driver");
32 /* List of SPs, SP count, read-write access lock, and access functions
40 /* Ever-increasing value to produce unique unit numbers */
49 	list_add_tail(&sp->entry, &sp_units);  in sp_add_device()
60 	list_del(&sp->entry);  in sp_del_device()
69 	if (sp->ccp_irq_handler)  in sp_irq_handler()
70 		sp->ccp_irq_handler(irq, sp->ccp_irq_data);  in sp_irq_handler()
72 	if (sp->psp_irq_handler)  in sp_irq_handler()
73 		sp->psp_irq_handler(irq, sp->psp_irq_data);  in sp_irq_handler()
83 	if ((sp->psp_irq == sp->ccp_irq) && sp->dev_vdata->psp_vdata) {  in sp_request_ccp_irq()
85 		sp->ccp_irq_data = data;  in sp_request_ccp_irq()
86 		sp->ccp_irq_handler = handler;  in sp_request_ccp_irq()
88 		if (!sp->irq_registered) {  in sp_request_ccp_irq()
89 			ret = request_irq(sp->ccp_irq, sp_irq_handler, 0,  in sp_request_ccp_irq()
90 					  sp->name, sp);  in sp_request_ccp_irq()
94 			sp->irq_registered = true;  in sp_request_ccp_irq()
97 		/* Each sub-device can manage it's own interrupt */  in sp_request_ccp_irq()
98 		ret = request_irq(sp->ccp_irq, handler, 0, name, data);  in sp_request_ccp_irq()
111 	if ((sp->psp_irq == sp->ccp_irq) && sp->dev_vdata->ccp_vdata) {  in sp_request_psp_irq()
113 		sp->psp_irq_data = data;  in sp_request_psp_irq()
114 		sp->psp_irq_handler = handler;  in sp_request_psp_irq()
116 		if (!sp->irq_registered) {  in sp_request_psp_irq()
117 			ret = request_irq(sp->psp_irq, sp_irq_handler, 0,  in sp_request_psp_irq()
118 					  sp->name, sp);  in sp_request_psp_irq()
122 			sp->irq_registered = true;  in sp_request_psp_irq()
125 		/* Each sub-device can manage it's own interrupt */  in sp_request_psp_irq()
126 		ret = request_irq(sp->psp_irq, handler, 0, name, data);  in sp_request_psp_irq()
136 	if ((sp->psp_irq == sp->ccp_irq) && sp->dev_vdata->psp_vdata) {  in sp_free_ccp_irq()
138 		if (!sp->psp_irq_handler) {  in sp_free_ccp_irq()
140 			free_irq(sp->ccp_irq, sp);  in sp_free_ccp_irq()
142 			sp->irq_registered = false;  in sp_free_ccp_irq()
145 		sp->ccp_irq_handler = NULL;  in sp_free_ccp_irq()
146 		sp->ccp_irq_data = NULL;  in sp_free_ccp_irq()
148 		/* Each sub-device can manage it's own interrupt */  in sp_free_ccp_irq()
149 		free_irq(sp->ccp_irq, data);  in sp_free_ccp_irq()
155 	if ((sp->psp_irq == sp->ccp_irq) && sp->dev_vdata->ccp_vdata) {  in sp_free_psp_irq()
157 		if (!sp->ccp_irq_handler) {  in sp_free_psp_irq()
159 			free_irq(sp->psp_irq, sp);  in sp_free_psp_irq()
161 			sp->irq_registered = false;  in sp_free_psp_irq()
164 		sp->psp_irq_handler = NULL;  in sp_free_psp_irq()
165 		sp->psp_irq_data = NULL;  in sp_free_psp_irq()
167 		/* Each sub-device can manage it's own interrupt */  in sp_free_psp_irq()
168 		free_irq(sp->psp_irq, data);  in sp_free_psp_irq()
173  * sp_alloc_struct - allocate and initialize the sp_device struct
185 	sp->dev = dev;  in sp_alloc_struct()
186 	sp->ord = atomic_inc_return(&sp_ordinal);  in sp_alloc_struct()
187 	snprintf(sp->name, SP_MAX_NAME_LEN, "sp-%u", sp->ord);  in sp_alloc_struct()
196 	if (sp->dev_vdata->ccp_vdata)  in sp_init()
199 	if (sp->dev_vdata->psp_vdata)  in sp_init()
206 	if (sp->dev_vdata->ccp_vdata)  in sp_destroy()
209 	if (sp->dev_vdata->psp_vdata)  in sp_destroy()
217 	if (sp->dev_vdata->ccp_vdata) {  in sp_suspend()
226 	if (sp->dev_vdata->ccp_vdata) {  in sp_resume()
243 		if (i->psp_data && i->get_psp_master_device) {  in sp_get_psp_master_device()
244 			ret = i->get_psp_master_device();  in sp_get_psp_master_device()
286 	return -ENODEV;  in sp_mod_init()