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 "drm_crtc_helper.h" 30 #include "radeon_drm.h" 31 #include "radeon_reg.h" 32 #include "radeon.h" 33 #include "atom.h" 34 35 irqreturn_t radeon_driver_irq_handler_kms(DRM_IRQ_ARGS) 36 { 37 struct drm_device *dev = (struct drm_device *) arg; 38 struct radeon_device *rdev = dev->dev_private; 39 40 return radeon_irq_process(rdev); 41 } 42 43 /* 44 * Handle hotplug events outside the interrupt handler proper. 45 */ 46 static void radeon_hotplug_work_func(struct work_struct *work) 47 { 48 struct radeon_device *rdev = container_of(work, struct radeon_device, 49 hotplug_work); 50 struct drm_device *dev = rdev->ddev; 51 struct drm_mode_config *mode_config = &dev->mode_config; 52 struct drm_connector *connector; 53 54 if (mode_config->num_connector) { 55 list_for_each_entry(connector, &mode_config->connector_list, head) 56 radeon_connector_hotplug(connector); 57 } 58 /* Just fire off a uevent and let userspace tell us what to do */ 59 drm_helper_hpd_irq_event(dev); 60 } 61 62 void radeon_driver_irq_preinstall_kms(struct drm_device *dev) 63 { 64 struct radeon_device *rdev = dev->dev_private; 65 unsigned i; 66 67 /* Disable *all* interrupts */ 68 rdev->irq.sw_int = false; 69 rdev->irq.gui_idle = false; 70 for (i = 0; i < rdev->num_crtc; i++) 71 rdev->irq.crtc_vblank_int[i] = false; 72 for (i = 0; i < 6; i++) { 73 rdev->irq.hpd[i] = false; 74 rdev->irq.pflip[i] = false; 75 } 76 radeon_irq_set(rdev); 77 /* Clear bits */ 78 radeon_irq_process(rdev); 79 } 80 81 int radeon_driver_irq_postinstall_kms(struct drm_device *dev) 82 { 83 struct radeon_device *rdev = dev->dev_private; 84 85 dev->max_vblank_count = 0x001fffff; 86 rdev->irq.sw_int = true; 87 radeon_irq_set(rdev); 88 return 0; 89 } 90 91 void radeon_driver_irq_uninstall_kms(struct drm_device *dev) 92 { 93 struct radeon_device *rdev = dev->dev_private; 94 unsigned i; 95 96 if (rdev == NULL) { 97 return; 98 } 99 /* Disable *all* interrupts */ 100 rdev->irq.sw_int = false; 101 rdev->irq.gui_idle = false; 102 for (i = 0; i < rdev->num_crtc; i++) 103 rdev->irq.crtc_vblank_int[i] = false; 104 for (i = 0; i < 6; i++) { 105 rdev->irq.hpd[i] = false; 106 rdev->irq.pflip[i] = false; 107 } 108 radeon_irq_set(rdev); 109 } 110 111 int radeon_irq_kms_init(struct radeon_device *rdev) 112 { 113 int i; 114 int r = 0; 115 116 INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func); 117 118 spin_lock_init(&rdev->irq.sw_lock); 119 for (i = 0; i < rdev->num_crtc; i++) 120 spin_lock_init(&rdev->irq.pflip_lock[i]); 121 r = drm_vblank_init(rdev->ddev, rdev->num_crtc); 122 if (r) { 123 return r; 124 } 125 /* enable msi */ 126 rdev->msi_enabled = 0; 127 /* MSIs don't seem to work reliably on all IGP 128 * chips. Disable MSI on them for now. 129 */ 130 if ((rdev->family >= CHIP_RV380) && 131 ((!(rdev->flags & RADEON_IS_IGP)) || (rdev->family >= CHIP_PALM)) && 132 (!(rdev->flags & RADEON_IS_AGP))) { 133 int ret = pci_enable_msi(rdev->pdev); 134 if (!ret) { 135 rdev->msi_enabled = 1; 136 dev_info(rdev->dev, "radeon: using MSI.\n"); 137 } 138 } 139 rdev->irq.installed = true; 140 r = drm_irq_install(rdev->ddev); 141 if (r) { 142 rdev->irq.installed = false; 143 return r; 144 } 145 DRM_INFO("radeon: irq initialized.\n"); 146 return 0; 147 } 148 149 void radeon_irq_kms_fini(struct radeon_device *rdev) 150 { 151 drm_vblank_cleanup(rdev->ddev); 152 if (rdev->irq.installed) { 153 drm_irq_uninstall(rdev->ddev); 154 rdev->irq.installed = false; 155 if (rdev->msi_enabled) 156 pci_disable_msi(rdev->pdev); 157 } 158 flush_work_sync(&rdev->hotplug_work); 159 } 160 161 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev) 162 { 163 unsigned long irqflags; 164 165 spin_lock_irqsave(&rdev->irq.sw_lock, irqflags); 166 if (rdev->ddev->irq_enabled && (++rdev->irq.sw_refcount == 1)) { 167 rdev->irq.sw_int = true; 168 radeon_irq_set(rdev); 169 } 170 spin_unlock_irqrestore(&rdev->irq.sw_lock, irqflags); 171 } 172 173 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev) 174 { 175 unsigned long irqflags; 176 177 spin_lock_irqsave(&rdev->irq.sw_lock, irqflags); 178 BUG_ON(rdev->ddev->irq_enabled && rdev->irq.sw_refcount <= 0); 179 if (rdev->ddev->irq_enabled && (--rdev->irq.sw_refcount == 0)) { 180 rdev->irq.sw_int = false; 181 radeon_irq_set(rdev); 182 } 183 spin_unlock_irqrestore(&rdev->irq.sw_lock, irqflags); 184 } 185 186 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc) 187 { 188 unsigned long irqflags; 189 190 if (crtc < 0 || crtc >= rdev->num_crtc) 191 return; 192 193 spin_lock_irqsave(&rdev->irq.pflip_lock[crtc], irqflags); 194 if (rdev->ddev->irq_enabled && (++rdev->irq.pflip_refcount[crtc] == 1)) { 195 rdev->irq.pflip[crtc] = true; 196 radeon_irq_set(rdev); 197 } 198 spin_unlock_irqrestore(&rdev->irq.pflip_lock[crtc], irqflags); 199 } 200 201 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc) 202 { 203 unsigned long irqflags; 204 205 if (crtc < 0 || crtc >= rdev->num_crtc) 206 return; 207 208 spin_lock_irqsave(&rdev->irq.pflip_lock[crtc], irqflags); 209 BUG_ON(rdev->ddev->irq_enabled && rdev->irq.pflip_refcount[crtc] <= 0); 210 if (rdev->ddev->irq_enabled && (--rdev->irq.pflip_refcount[crtc] == 0)) { 211 rdev->irq.pflip[crtc] = false; 212 radeon_irq_set(rdev); 213 } 214 spin_unlock_irqrestore(&rdev->irq.pflip_lock[crtc], irqflags); 215 } 216 217