drivers/gpu/drm/amd/include/cgs_linux.h

   1 /*
   2  * Copyright 2015 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  *
  23  */
  24 #ifndef _CGS_LINUX_H
  25 #define _CGS_LINUX_H
  26
  27 #include "cgs_common.h"
  28
  29 /**
  30  * cgs_irq_source_set_func() - Callback for enabling/disabling interrupt sources
  31  * @private_data:  private data provided to cgs_add_irq_source
  32  * @src_id:        interrupt source ID
  33  * @type:          interrupt type
  34  * @enabled:       0 = disable source, non-0 = enable source
  35  *
  36  * Return:  0 on success, -errno otherwise
  37  */
  38 typedef int (*cgs_irq_source_set_func_t)(void *private_data,
  39                                          unsigned src_id, unsigned type,
  40                                          int enabled);
  41
  42 /**
  43  * cgs_irq_handler_func() - Interrupt handler callback
  44  * @private_data:  private data provided to cgs_add_irq_source
  45  * @src_id:        interrupt source ID
  46  * @iv_entry:      pointer to raw ih ring entry
  47  *
  48  * This callback runs in interrupt context.
  49  *
  50  * Return:  0 on success, -errno otherwise
  51  */
  52 typedef int (*cgs_irq_handler_func_t)(void *private_data,
  53                                       unsigned src_id, const uint32_t *iv_entry);
  54
  55 /**
  56  * cgs_add_irq_source() - Add an IRQ source
  57  * @cgs_device:    opaque device handle
  58  * @src_id:        interrupt source ID
  59  * @num_types:     number of interrupt types that can be independently enabled
  60  * @set:           callback function to enable/disable an interrupt type
  61  * @handler:       interrupt handler callback
  62  * @private_data:  private data to pass to callback functions
  63  *
  64  * The same IRQ source can be added only once. Adding an IRQ source
  65  * indicates ownership of that IRQ source and all its IRQ types.
  66  *
  67  * Return:  0 on success, -errno otherwise
  68  */
  69 typedef int (*cgs_add_irq_source_t)(void *cgs_device, unsigned src_id,
  70                                     unsigned num_types,
  71                                     cgs_irq_source_set_func_t set,
  72                                     cgs_irq_handler_func_t handler,
  73                                     void *private_data);
  74
  75 /**
  76  * cgs_irq_get() - Request enabling an IRQ source and type
  77  * @cgs_device:  opaque device handle
  78  * @src_id:      interrupt source ID
  79  * @type:        interrupt type
  80  *
  81  * cgs_irq_get and cgs_irq_put calls must be balanced. They count
  82  * "references" to IRQ sources.
  83  *
  84  * Return:  0 on success, -errno otherwise
  85  */
  86 typedef int (*cgs_irq_get_t)(void *cgs_device, unsigned src_id, unsigned type);
  87
  88 /**
  89  * cgs_irq_put() - Indicate IRQ source is no longer needed
  90  * @cgs_device:  opaque device handle
  91  * @src_id:      interrupt source ID
  92  * @type:        interrupt type
  93  *
  94  * cgs_irq_get and cgs_irq_put calls must be balanced. They count
  95  * "references" to IRQ sources. Even after cgs_irq_put is called, the
  96  * IRQ handler may still be called if there are more refecences to
  97  * the IRQ source.
  98  *
  99  * Return:  0 on success, -errno otherwise
 100  */
 101 typedef int (*cgs_irq_put_t)(void *cgs_device, unsigned src_id, unsigned type);
 102
 103 struct cgs_os_ops {
 104         /* IRQ handling */
 105         cgs_add_irq_source_t add_irq_source;
 106         cgs_irq_get_t irq_get;
 107         cgs_irq_put_t irq_put;
 108 };
 109
 110 #define cgs_add_irq_source(dev,src_id,num_types,set,handler,private_data) \
 111         CGS_OS_CALL(add_irq_source,dev,src_id,num_types,set,handler,    \
 112                     private_data)
 113 #define cgs_irq_get(dev,src_id,type)            \
 114         CGS_OS_CALL(irq_get,dev,src_id,type)
 115 #define cgs_irq_put(dev,src_id,type)            \
 116         CGS_OS_CALL(irq_put,dev,src_id,type)
 117
 118 #endif /* _CGS_LINUX_H */