drivers/gpu/drm/radeon/radeon_irq_kms.c

   1 /*
   2  * Copyright 2008 Advanced Micro Devices, Inc.
   3  * Copyright 2008 Red Hat Inc.
   4  * Copyright 2009 Jerome Glisse.
   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: Dave Airlie
  25  *          Alex Deucher
  26  *          Jerome Glisse
  27  */
  28 #include "drmP.h"
  29 #include "radeon_drm.h"
  30 #include "radeon_reg.h"
  31 #include "radeon_microcode.h"
  32 #include "radeon.h"
  33 #include "atom.h"
  34
  35 static inline uint32_t r100_irq_ack(struct radeon_device *rdev)
  36 {
  37         uint32_t irqs = RREG32(RADEON_GEN_INT_STATUS);
  38         uint32_t irq_mask = RADEON_SW_INT_TEST;
  39
  40         if (irqs) {
  41                 WREG32(RADEON_GEN_INT_STATUS, irqs);
  42         }
  43         return irqs & irq_mask;
  44 }
  45
  46 int r100_irq_set(struct radeon_device *rdev)
  47 {
  48         uint32_t tmp = 0;
  49
  50         if (rdev->irq.sw_int) {
  51                 tmp |= RADEON_SW_INT_ENABLE;
  52         }
  53         /* Todo go through CRTC and enable vblank int or not */
  54         WREG32(RADEON_GEN_INT_CNTL, tmp);
  55         return 0;
  56 }
  57
  58 int r100_irq_process(struct radeon_device *rdev)
  59 {
  60         uint32_t status;
  61
  62         status = r100_irq_ack(rdev);
  63         if (!status) {
  64                 return IRQ_NONE;
  65         }
  66         while (status) {
  67                 /* SW interrupt */
  68                 if (status & RADEON_SW_INT_TEST) {
  69                         radeon_fence_process(rdev);
  70                 }
  71                 status = r100_irq_ack(rdev);
  72         }
  73         return IRQ_HANDLED;
  74 }
  75
  76 int rs600_irq_set(struct radeon_device *rdev)
  77 {
  78         uint32_t tmp = 0;
  79
  80         if (rdev->irq.sw_int) {
  81                 tmp |= RADEON_SW_INT_ENABLE;
  82         }
  83         WREG32(RADEON_GEN_INT_CNTL, tmp);
  84         /* Todo go through CRTC and enable vblank int or not */
  85         WREG32(R500_DxMODE_INT_MASK, 0);
  86         return 0;
  87 }
  88
  89 irqreturn_t radeon_driver_irq_handler_kms(DRM_IRQ_ARGS)
  90 {
  91         struct drm_device *dev = (struct drm_device *) arg;
  92         struct radeon_device *rdev = dev->dev_private;
  93
  94         return radeon_irq_process(rdev);
  95 }
  96
  97 void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
  98 {
  99         struct radeon_device *rdev = dev->dev_private;
 100         unsigned i;
 101
 102         /* Disable *all* interrupts */
 103         rdev->irq.sw_int = false;
 104         for (i = 0; i < 2; i++) {
 105                 rdev->irq.crtc_vblank_int[i] = false;
 106         }
 107         radeon_irq_set(rdev);
 108         /* Clear bits */
 109         radeon_irq_process(rdev);
 110 }
 111
 112 int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
 113 {
 114         struct radeon_device *rdev = dev->dev_private;
 115
 116         dev->max_vblank_count = 0x001fffff;
 117         rdev->irq.sw_int = true;
 118         radeon_irq_set(rdev);
 119         return 0;
 120 }
 121
 122 void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
 123 {
 124         struct radeon_device *rdev = dev->dev_private;
 125         unsigned i;
 126
 127         if (rdev == NULL) {
 128                 return;
 129         }
 130         /* Disable *all* interrupts */
 131         rdev->irq.sw_int = false;
 132         for (i = 0; i < 2; i++) {
 133                 rdev->irq.crtc_vblank_int[i] = false;
 134         }
 135         radeon_irq_set(rdev);
 136 }
 137
 138 int radeon_irq_kms_init(struct radeon_device *rdev)
 139 {
 140         int r = 0;
 141
 142         r = drm_vblank_init(rdev->ddev, 2);
 143         if (r) {
 144                 return r;
 145         }
 146         drm_irq_install(rdev->ddev);
 147         rdev->irq.installed = true;
 148         DRM_INFO("radeon: irq initialized.\n");
 149         return 0;
 150 }
 151
 152 void radeon_irq_kms_fini(struct radeon_device *rdev)
 153 {
 154         if (rdev->irq.installed) {
 155                 rdev->irq.installed = false;
 156                 drm_irq_uninstall(rdev->ddev);
 157         }
 158 }