2 * Copyright (c) 2007 Intel Corporation
3 * Jesse Barnes <jesse.barnes@intel.com>
5 * Copyright © 2002, 2003 David Dawes <dawes@xfree86.org>
12 #include "drm_sarea.h"
17 * i915_probe_agp - get AGP bootup configuration
19 * @aperture_size: returns AGP aperture configured size
20 * @preallocated_size: returns size of BIOS preallocated AGP space
22 * Since Intel integrated graphics are UMA, the BIOS has to set aside
23 * some RAM for the framebuffer at early boot. This code figures out
24 * how much was set aside so we can use it for our own purposes.
26 int i915_probe_agp(struct pci_dev *pdev, unsigned long *aperture_size,
27 unsigned long *preallocated_size)
29 struct pci_dev *bridge_dev;
31 unsigned long overhead;
33 bridge_dev = pci_get_bus_and_slot(0, PCI_DEVFN(0,0));
35 DRM_ERROR("bridge device not found\n");
39 /* Get the fb aperture size and "stolen" memory amount. */
40 pci_read_config_word(bridge_dev, INTEL_GMCH_CTRL, &tmp);
41 pci_dev_put(bridge_dev);
43 *aperture_size = 1024 * 1024;
44 *preallocated_size = 1024 * 1024;
46 switch (pdev->device) {
47 case PCI_DEVICE_ID_INTEL_82830_CGC:
48 case PCI_DEVICE_ID_INTEL_82845G_HB:
49 case PCI_DEVICE_ID_INTEL_82855GM_IG:
50 case PCI_DEVICE_ID_INTEL_82865_IG:
51 if ((tmp & INTEL_GMCH_MEM_MASK) == INTEL_GMCH_MEM_64M)
54 *aperture_size *= 128;
57 /* 9xx supports large sizes, just look at the length */
58 *aperture_size = pci_resource_len(pdev, 2);
63 * Some of the preallocated space is taken by the GTT
64 * and popup. GTT is 1K per MB of aperture size, and popup is 4K.
66 overhead = (*aperture_size / 1024) + 4096;
67 switch (tmp & INTEL_855_GMCH_GMS_MASK) {
68 case INTEL_855_GMCH_GMS_STOLEN_1M:
69 break; /* 1M already */
70 case INTEL_855_GMCH_GMS_STOLEN_4M:
71 *preallocated_size *= 4;
73 case INTEL_855_GMCH_GMS_STOLEN_8M:
74 *preallocated_size *= 8;
76 case INTEL_855_GMCH_GMS_STOLEN_16M:
77 *preallocated_size *= 16;
79 case INTEL_855_GMCH_GMS_STOLEN_32M:
80 *preallocated_size *= 32;
82 case INTEL_915G_GMCH_GMS_STOLEN_48M:
83 *preallocated_size *= 48;
85 case INTEL_915G_GMCH_GMS_STOLEN_64M:
86 *preallocated_size *= 64;
88 case INTEL_855_GMCH_GMS_DISABLED:
89 DRM_ERROR("video memory is disabled\n");
92 DRM_ERROR("unexpected GMCH_GMS value: 0x%02x\n",
93 tmp & INTEL_855_GMCH_GMS_MASK);
96 *preallocated_size -= overhead;
102 * i915_driver_load - setup chip and create an initial config
104 * @flags: startup flags
106 * The driver load routine has to do several things:
107 * - drive output discovery via intel_modeset_init()
108 * - initialize the memory manager
109 * - allocate initial config memory
110 * - setup the DRM framebuffer with the allocated memory
112 int i915_driver_load(drm_device_t *dev, unsigned long flags)
114 drm_i915_private_t *dev_priv;
115 drm_i915_init_t init;
116 drm_buffer_object_t *entry;
117 struct drm_framebuffer *fb;
118 unsigned long agp_size, prealloc_size;
119 int hsize, vsize, bytes_per_pixel, size, ret;
121 dev_priv = drm_alloc(sizeof(drm_i915_private_t), DRM_MEM_DRIVER);
122 if (dev_priv == NULL)
123 return DRM_ERR(ENOMEM);
125 memset(dev_priv, 0, sizeof(drm_i915_private_t));
126 dev->dev_private = (void *)dev_priv;
127 // dev_priv->flags = flags;
129 /* i915 has 4 more counters */
131 dev->types[6] = _DRM_STAT_IRQ;
132 dev->types[7] = _DRM_STAT_PRIMARY;
133 dev->types[8] = _DRM_STAT_SECONDARY;
134 dev->types[9] = _DRM_STAT_DMA;
137 dev_priv->mmiobase = drm_get_resource_start(dev, 0);
138 dev_priv->mmiolen = drm_get_resource_len(dev, 0);
139 dev->mode_config.fb_base = dev_priv->baseaddr =
140 drm_get_resource_start(dev, 2) & 0xff000000;
141 } else if (drm_get_resource_start(dev, 1)) {
142 dev_priv->mmiobase = drm_get_resource_start(dev, 1);
143 dev_priv->mmiolen = drm_get_resource_len(dev, 1);
144 dev->mode_config.fb_base = dev_priv->baseaddr =
145 drm_get_resource_start(dev, 0) & 0xff000000;
147 DRM_ERROR("Unable to find MMIO registers\n");
151 ret = drm_addmap(dev, dev_priv->mmiobase, dev_priv->mmiolen,
152 _DRM_REGISTERS, _DRM_READ_ONLY, &dev_priv->mmio_map);
154 DRM_ERROR("Cannot add mapping for MMIO registers\n");
158 ret = drm_setup(dev);
160 DRM_ERROR("drm_setup failed\n");
165 if (!dev_priv->sarea) {
166 DRM_ERROR("can not find sarea!\n");
167 dev->dev_private = (void *)dev_priv;
168 i915_dma_cleanup(dev);
169 return DRM_ERR(EINVAL);
172 /* FIXME: assume sarea_priv is right after SAREA */
173 dev_priv->sarea_priv = dev_priv->sarea->handle + sizeof(drm_sarea_t);
176 * Initialize the memory manager for local and AGP space
178 drm_bo_driver_init(dev);
180 i915_probe_agp(dev->pdev, &agp_size, &prealloc_size);
181 drm_bo_init_mm(dev, DRM_BO_MEM_PRIV0, dev_priv->baseaddr,
184 /* Allocate scanout buffer and command ring */
185 /* FIXME: types and other args correct? */
189 size = hsize * vsize * bytes_per_pixel;
190 drm_buffer_object_create(dev, size, drm_bo_type_kernel,
191 DRM_BO_FLAG_READ | DRM_BO_FLAG_WRITE |
192 DRM_BO_FLAG_MEM_PRIV0 | DRM_BO_FLAG_NO_MOVE,
196 DRM_DEBUG("allocated bo, start: 0x%lx, offset: 0x%lx\n",
197 entry->buffer_start, entry->offset);
198 intel_modeset_init(dev);
200 fb = drm_framebuffer_create(dev);
202 DRM_ERROR("failed to allocate fb\n");
209 fb->bits_per_pixel = bytes_per_pixel * 8;
210 fb->depth = bytes_per_pixel * 8;
211 fb->offset = entry->offset;
214 drm_initial_config(dev, fb, false);
215 drmfb_probe(dev, fb);
217 /* FIXME: command ring needs AGP space, do we own it at this point? */
218 dev_priv->ring.Start = dev_priv->baseaddr;
219 dev_priv->ring.End = 128*1024;
220 dev_priv->ring.Size = 128*1024;
221 dev_priv->ring.tail_mask = dev_priv->ring.Size - 1;
223 dev_priv->ring.map.offset = dev_priv->ring.Start;
224 dev_priv->ring.map.size = dev_priv->ring.Size;
225 dev_priv->ring.map.type = 0;
226 dev_priv->ring.map.flags = 0;
227 dev_priv->ring.map.mtrr = 0;
229 drm_core_ioremap(&dev_priv->ring.map, dev);
231 if (dev_priv->ring.map.handle == NULL) {
232 dev->dev_private = (void *)dev_priv;
233 i915_dma_cleanup(dev);
234 DRM_ERROR("can not ioremap virtual address for"
236 return DRM_ERR(ENOMEM);
239 dev_priv->ring.virtual_start = dev_priv->ring.map.handle;
241 dev_priv->sarea_priv->pf_current_page = 0;
243 /* We are using separate values as placeholders for mechanisms for
244 * private backbuffer/depthbuffer usage.
246 dev_priv->use_mi_batchbuffer_start = 0;
248 /* Allow hardware batchbuffers unless told otherwise.
250 dev_priv->allow_batchbuffer = 1;
252 /* Program Hardware Status Page */
253 dev_priv->status_page_dmah = drm_pci_alloc(dev, PAGE_SIZE, PAGE_SIZE,
256 if (!dev_priv->status_page_dmah) {
257 dev->dev_private = (void *)dev_priv;
258 i915_dma_cleanup(dev);
259 DRM_ERROR("Can not allocate hardware status page\n");
260 return DRM_ERR(ENOMEM);
262 dev_priv->hw_status_page = dev_priv->status_page_dmah->vaddr;
263 dev_priv->dma_status_page = dev_priv->status_page_dmah->busaddr;
265 memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
266 DRM_DEBUG("hw status page @ %p\n", dev_priv->hw_status_page);
268 I915_WRITE(0x02080, dev_priv->dma_status_page);
269 DRM_DEBUG("Enabled hardware status page\n");
275 int i915_driver_unload(drm_device_t *dev)
277 drm_i915_private_t *dev_priv = dev->dev_private;
278 struct drm_framebuffer *fb;
280 /* FIXME: remove framebuffer */
281 intel_modeset_cleanup(dev);
282 drm_free(dev_priv, sizeof(*dev_priv), DRM_MEM_DRIVER);
284 dev->dev_private = NULL;
288 void i915_driver_lastclose(drm_device_t * dev)
290 drm_i915_private_t *dev_priv = dev->dev_private;
292 i915_mem_takedown(&(dev_priv->agp_heap));
294 i915_dma_cleanup(dev);
296 dev_priv->mmio_map = NULL;
299 void i915_driver_preclose(drm_device_t * dev, DRMFILE filp)
301 drm_i915_private_t *dev_priv = dev->dev_private;
302 i915_mem_release(dev, filp, dev_priv->agp_heap);