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.h" 32 #include "atom.h" 33 34 irqreturn_t radeon_driver_irq_handler_kms(DRM_IRQ_ARGS) 35 { 36 struct drm_device *dev = (struct drm_device *) arg; 37 struct radeon_device *rdev = dev->dev_private; 38 39 return radeon_irq_process(rdev); 40 } 41 42 /* 43 * Handle hotplug events outside the interrupt handler proper. 44 */ 45 static void radeon_hotplug_work_func(struct work_struct *work) 46 { 47 struct radeon_device *rdev = container_of(work, struct radeon_device, 48 hotplug_work); 49 struct drm_device *dev = rdev->ddev; 50 struct drm_mode_config *mode_config = &dev->mode_config; 51 struct drm_connector *connector; 52 53 if (mode_config->num_connector) { 54 list_for_each_entry(connector, &mode_config->connector_list, head) 55 radeon_connector_hotplug(connector); 56 } 57 /* Just fire off a uevent and let userspace tell us what to do */ 58 drm_sysfs_hotplug_event(dev); 59 } 60 61 void radeon_driver_irq_preinstall_kms(struct drm_device *dev) 62 { 63 struct radeon_device *rdev = dev->dev_private; 64 unsigned i; 65 66 INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func); 67 68 /* Disable *all* interrupts */ 69 rdev->irq.sw_int = false; 70 for (i = 0; i < 2; i++) { 71 rdev->irq.crtc_vblank_int[i] = false; 72 } 73 radeon_irq_set(rdev); 74 /* Clear bits */ 75 radeon_irq_process(rdev); 76 } 77 78 int radeon_driver_irq_postinstall_kms(struct drm_device *dev) 79 { 80 struct radeon_device *rdev = dev->dev_private; 81 82 dev->max_vblank_count = 0x001fffff; 83 rdev->irq.sw_int = true; 84 radeon_irq_set(rdev); 85 return 0; 86 } 87 88 void radeon_driver_irq_uninstall_kms(struct drm_device *dev) 89 { 90 struct radeon_device *rdev = dev->dev_private; 91 unsigned i; 92 93 if (rdev == NULL) { 94 return; 95 } 96 /* Disable *all* interrupts */ 97 rdev->irq.sw_int = false; 98 for (i = 0; i < 2; i++) { 99 rdev->irq.crtc_vblank_int[i] = false; 100 } 101 radeon_irq_set(rdev); 102 } 103 104 int radeon_irq_kms_init(struct radeon_device *rdev) 105 { 106 int r = 0; 107 int num_crtc = 2; 108 109 if (rdev->flags & RADEON_SINGLE_CRTC) 110 num_crtc = 1; 111 spin_lock_init(&rdev->irq.sw_lock); 112 r = drm_vblank_init(rdev->ddev, num_crtc); 113 if (r) { 114 return r; 115 } 116 /* enable msi */ 117 rdev->msi_enabled = 0; 118 /* MSIs don't seem to work on my rs780; 119 * not sure about rs880 or other rs780s. 120 * Needs more investigation. 121 */ 122 if ((rdev->family >= CHIP_RV380) && 123 (rdev->family != CHIP_RS780) && 124 (rdev->family != CHIP_RS880)) { 125 int ret = pci_enable_msi(rdev->pdev); 126 if (!ret) { 127 rdev->msi_enabled = 1; 128 DRM_INFO("radeon: using MSI.\n"); 129 } 130 } 131 drm_irq_install(rdev->ddev); 132 rdev->irq.installed = true; 133 DRM_INFO("radeon: irq initialized.\n"); 134 return 0; 135 } 136 137 void radeon_irq_kms_fini(struct radeon_device *rdev) 138 { 139 if (rdev->irq.installed) { 140 rdev->irq.installed = false; 141 drm_irq_uninstall(rdev->ddev); 142 if (rdev->msi_enabled) 143 pci_disable_msi(rdev->pdev); 144 } 145 } 146 147 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev) 148 { 149 unsigned long irqflags; 150 151 spin_lock_irqsave(&rdev->irq.sw_lock, irqflags); 152 if (rdev->ddev->irq_enabled && (++rdev->irq.sw_refcount == 1)) { 153 rdev->irq.sw_int = true; 154 radeon_irq_set(rdev); 155 } 156 spin_unlock_irqrestore(&rdev->irq.sw_lock, irqflags); 157 } 158 159 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev) 160 { 161 unsigned long irqflags; 162 163 spin_lock_irqsave(&rdev->irq.sw_lock, irqflags); 164 BUG_ON(rdev->ddev->irq_enabled && rdev->irq.sw_refcount <= 0); 165 if (rdev->ddev->irq_enabled && (--rdev->irq.sw_refcount == 0)) { 166 rdev->irq.sw_int = false; 167 radeon_irq_set(rdev); 168 } 169 spin_unlock_irqrestore(&rdev->irq.sw_lock, irqflags); 170 } 171 172