1 /*
2  * Copyright 2008 Red Hat Inc.
3  * Copyright 2009 Jerome Glisse.
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining a
6  * copy of this software and associated documentation files (the "Software"),
7  * to deal in the Software without restriction, including without limitation
8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9  * and/or sell copies of the Software, and to permit persons to whom the
10  * Software is furnished to do so, subject to the following conditions:
11  *
12  * The above copyright notice and this permission notice shall be included in
13  * all copies or substantial portions of the Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
19  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21  * OTHER DEALINGS IN THE SOFTWARE.
22  *
23  * Authors:
24  *    Dave Airlie
25  *    Jerome Glisse <glisse@freedesktop.org>
26  */
27 
28 #include <linux/pci.h>
29 
30 #include <drm/drm_device.h>
31 #include <drm/radeon_drm.h>
32 
33 #include "radeon.h"
34 
35 #if IS_ENABLED(CONFIG_AGP)
36 
37 struct radeon_agpmode_quirk {
38 	u32 hostbridge_vendor;
39 	u32 hostbridge_device;
40 	u32 chip_vendor;
41 	u32 chip_device;
42 	u32 subsys_vendor;
43 	u32 subsys_device;
44 	u32 default_mode;
45 };
46 
47 static struct radeon_agpmode_quirk radeon_agpmode_quirk_list[] = {
48 	/* Intel E7505 Memory Controller Hub / RV350 AR [Radeon 9600XT] Needs AGPMode 4 (deb #515326) */
49 	{ PCI_VENDOR_ID_INTEL, 0x2550, PCI_VENDOR_ID_ATI, 0x4152, 0x1458, 0x4038, 4},
50 	/* Intel 82865G/PE/P DRAM Controller/Host-Hub / Mobility 9800 Needs AGPMode 4 (deb #462590) */
51 	{ PCI_VENDOR_ID_INTEL, 0x2570, PCI_VENDOR_ID_ATI, 0x4a4e, PCI_VENDOR_ID_DELL, 0x5106, 4},
52 	/* Intel 82865G/PE/P DRAM Controller/Host-Hub / RV280 [Radeon 9200 SE] Needs AGPMode 4 (lp #300304) */
53 	{ PCI_VENDOR_ID_INTEL, 0x2570, PCI_VENDOR_ID_ATI, 0x5964,
54 		0x148c, 0x2073, 4},
55 	/* Intel 82855PM Processor to I/O Controller / Mobility M6 LY Needs AGPMode 1 (deb #467235) */
56 	{ PCI_VENDOR_ID_INTEL, 0x3340, PCI_VENDOR_ID_ATI, 0x4c59,
57 		PCI_VENDOR_ID_IBM, 0x052f, 1},
58 	/* Intel 82855PM host bridge / Mobility 9600 M10 RV350 Needs AGPMode 1 (lp #195051) */
59 	{ PCI_VENDOR_ID_INTEL, 0x3340, PCI_VENDOR_ID_ATI, 0x4e50,
60 		PCI_VENDOR_ID_IBM, 0x0550, 1},
61 	/* Intel 82855PM host bridge / RV250/M9 GL [Mobility FireGL 9000/Radeon 9000] needs AGPMode 1 (Thinkpad T40p) */
62 	{ PCI_VENDOR_ID_INTEL, 0x3340, PCI_VENDOR_ID_ATI, 0x4c66,
63 		PCI_VENDOR_ID_IBM, 0x054d, 1},
64 	/* Intel 82855PM host bridge / Mobility M7 needs AGPMode 1 */
65 	{ PCI_VENDOR_ID_INTEL, 0x3340, PCI_VENDOR_ID_ATI, 0x4c57,
66 		PCI_VENDOR_ID_IBM, 0x0530, 1},
67 	/* Intel 82855PM host bridge / FireGL Mobility T2 RV350 Needs AGPMode 2 (fdo #20647) */
68 	{ PCI_VENDOR_ID_INTEL, 0x3340, PCI_VENDOR_ID_ATI, 0x4e54,
69 		PCI_VENDOR_ID_IBM, 0x054f, 2},
70 	/* Intel 82855PM host bridge / Mobility M9+ / VaioPCG-V505DX Needs AGPMode 2 (fdo #17928) */
71 	{ PCI_VENDOR_ID_INTEL, 0x3340, PCI_VENDOR_ID_ATI, 0x5c61,
72 		PCI_VENDOR_ID_SONY, 0x816b, 2},
73 	/* Intel 82855PM Processor to I/O Controller / Mobility M9+ Needs AGPMode 8 (phoronix forum) */
74 	{ PCI_VENDOR_ID_INTEL, 0x3340, PCI_VENDOR_ID_ATI, 0x5c61,
75 		PCI_VENDOR_ID_SONY, 0x8195, 8},
76 	/* Intel 82830 830 Chipset Host Bridge / Mobility M6 LY Needs AGPMode 2 (fdo #17360)*/
77 	{ PCI_VENDOR_ID_INTEL, 0x3575, PCI_VENDOR_ID_ATI, 0x4c59,
78 		PCI_VENDOR_ID_DELL, 0x00e3, 2},
79 	/* Intel 82852/82855 host bridge / Mobility FireGL 9000 RV250 Needs AGPMode 1 (lp #296617) */
80 	{ PCI_VENDOR_ID_INTEL, 0x3580, PCI_VENDOR_ID_ATI, 0x4c66,
81 		PCI_VENDOR_ID_DELL, 0x0149, 1},
82 	/* Intel 82855PM host bridge / Mobility FireGL 9000 RV250 Needs AGPMode 1 for suspend/resume */
83 	{ PCI_VENDOR_ID_INTEL, 0x3340, PCI_VENDOR_ID_ATI, 0x4c66,
84 		PCI_VENDOR_ID_IBM, 0x0531, 1},
85 	/* Intel 82852/82855 host bridge / Mobility 9600 M10 RV350 Needs AGPMode 1 (deb #467460) */
86 	{ PCI_VENDOR_ID_INTEL, 0x3580, PCI_VENDOR_ID_ATI, 0x4e50,
87 		0x1025, 0x0061, 1},
88 	/* Intel 82852/82855 host bridge / Mobility 9600 M10 RV350 Needs AGPMode 1 (lp #203007) */
89 	{ PCI_VENDOR_ID_INTEL, 0x3580, PCI_VENDOR_ID_ATI, 0x4e50,
90 		0x1025, 0x0064, 1},
91 	/* Intel 82852/82855 host bridge / Mobility 9600 M10 RV350 Needs AGPMode 1 (lp #141551) */
92 	{ PCI_VENDOR_ID_INTEL, 0x3580, PCI_VENDOR_ID_ATI, 0x4e50,
93 		PCI_VENDOR_ID_ASUSTEK, 0x1942, 1},
94 	/* Intel 82852/82855 host bridge / Mobility 9600/9700 Needs AGPMode 1 (deb #510208) */
95 	{ PCI_VENDOR_ID_INTEL, 0x3580, PCI_VENDOR_ID_ATI, 0x4e50,
96 		0x10cf, 0x127f, 1},
97 	/* ASRock K7VT4A+ AGP 8x / ATI Radeon 9250 AGP Needs AGPMode 4 (lp #133192) */
98 	{ 0x1849, 0x3189, PCI_VENDOR_ID_ATI, 0x5960,
99 		0x1787, 0x5960, 4},
100 	/* VIA K8M800 Host Bridge / RV280 [Radeon 9200 PRO] Needs AGPMode 4 (fdo #12544) */
101 	{ PCI_VENDOR_ID_VIA, 0x0204, PCI_VENDOR_ID_ATI, 0x5960,
102 		0x17af, 0x2020, 4},
103 	/* VIA KT880 Host Bridge / RV350 [Radeon 9550] Needs AGPMode 4 (fdo #19981) */
104 	{ PCI_VENDOR_ID_VIA, 0x0269, PCI_VENDOR_ID_ATI, 0x4153,
105 		PCI_VENDOR_ID_ASUSTEK, 0x003c, 4},
106 	/* VIA VT8363 Host Bridge / R200 QL [Radeon 8500] Needs AGPMode 2 (lp #141551) */
107 	{ PCI_VENDOR_ID_VIA, 0x0305, PCI_VENDOR_ID_ATI, 0x514c,
108 		PCI_VENDOR_ID_ATI, 0x013a, 2},
109 	/* VIA VT82C693A Host Bridge / RV280 [Radeon 9200 PRO] Needs AGPMode 2 (deb #515512) */
110 	{ PCI_VENDOR_ID_VIA, 0x0691, PCI_VENDOR_ID_ATI, 0x5960,
111 		PCI_VENDOR_ID_ASUSTEK, 0x004c, 2},
112 	/* VIA VT82C693A Host Bridge / RV280 [Radeon 9200 PRO] Needs AGPMode 2 */
113 	{ PCI_VENDOR_ID_VIA, 0x0691, PCI_VENDOR_ID_ATI, 0x5960,
114 		PCI_VENDOR_ID_ASUSTEK, 0x0054, 2},
115 	/* VIA VT8377 Host Bridge / R200 QM [Radeon 9100] Needs AGPMode 4 (deb #461144) */
116 	{ PCI_VENDOR_ID_VIA, 0x3189, PCI_VENDOR_ID_ATI, 0x514d,
117 		0x174b, 0x7149, 4},
118 	/* VIA VT8377 Host Bridge / RV280 [Radeon 9200 PRO] Needs AGPMode 4 (lp #312693) */
119 	{ PCI_VENDOR_ID_VIA, 0x3189, PCI_VENDOR_ID_ATI, 0x5960,
120 		0x1462, 0x0380, 4},
121 	/* VIA VT8377 Host Bridge / RV280 Needs AGPMode 4 (ati ML) */
122 	{ PCI_VENDOR_ID_VIA, 0x3189, PCI_VENDOR_ID_ATI, 0x5964,
123 		0x148c, 0x2073, 4},
124 	/* ATI Host Bridge / RV280 [M9+] Needs AGPMode 1 (phoronix forum) */
125 	{ PCI_VENDOR_ID_ATI, 0xcbb2, PCI_VENDOR_ID_ATI, 0x5c61,
126 		PCI_VENDOR_ID_SONY, 0x8175, 1},
127 	{ 0, 0, 0, 0, 0, 0, 0 },
128 };
129 
130 struct radeon_agp_head *radeon_agp_head_init(struct drm_device *dev)
131 {
132 	struct pci_dev *pdev = to_pci_dev(dev->dev);
133 	struct radeon_agp_head *head;
134 
135 	head = kzalloc(sizeof(*head), GFP_KERNEL);
136 	if (!head)
137 		return NULL;
138 	head->bridge = agp_find_bridge(pdev);
139 	if (!head->bridge) {
140 		head->bridge = agp_backend_acquire(pdev);
141 		if (!head->bridge) {
142 			kfree(head);
143 			return NULL;
144 		}
145 		agp_copy_info(head->bridge, &head->agp_info);
146 		agp_backend_release(head->bridge);
147 	} else {
148 		agp_copy_info(head->bridge, &head->agp_info);
149 	}
150 	if (head->agp_info.chipset == NOT_SUPPORTED) {
151 		kfree(head);
152 		return NULL;
153 	}
154 	INIT_LIST_HEAD(&head->memory);
155 	head->cant_use_aperture = head->agp_info.cant_use_aperture;
156 	head->page_mask = head->agp_info.page_mask;
157 	head->base = head->agp_info.aper_base;
158 
159 	return head;
160 }
161 
162 static int radeon_agp_head_acquire(struct radeon_device *rdev)
163 {
164 	struct drm_device *dev = rdev->ddev;
165 	struct pci_dev *pdev = to_pci_dev(dev->dev);
166 
167 	if (!rdev->agp)
168 		return -ENODEV;
169 	if (rdev->agp->acquired)
170 		return -EBUSY;
171 	rdev->agp->bridge = agp_backend_acquire(pdev);
172 	if (!rdev->agp->bridge)
173 		return -ENODEV;
174 	rdev->agp->acquired = 1;
175 	return 0;
176 }
177 
178 static int radeon_agp_head_release(struct radeon_device *rdev)
179 {
180 	if (!rdev->agp || !rdev->agp->acquired)
181 		return -EINVAL;
182 	agp_backend_release(rdev->agp->bridge);
183 	rdev->agp->acquired = 0;
184 	return 0;
185 }
186 
187 static int radeon_agp_head_enable(struct radeon_device *rdev, struct radeon_agp_mode mode)
188 {
189 	if (!rdev->agp || !rdev->agp->acquired)
190 		return -EINVAL;
191 
192 	rdev->agp->mode = mode.mode;
193 	agp_enable(rdev->agp->bridge, mode.mode);
194 	rdev->agp->enabled = 1;
195 	return 0;
196 }
197 
198 static int radeon_agp_head_info(struct radeon_device *rdev, struct radeon_agp_info *info)
199 {
200 	struct agp_kern_info *kern;
201 
202 	if (!rdev->agp || !rdev->agp->acquired)
203 		return -EINVAL;
204 
205 	kern = &rdev->agp->agp_info;
206 	info->agp_version_major = kern->version.major;
207 	info->agp_version_minor = kern->version.minor;
208 	info->mode = kern->mode;
209 	info->aperture_base = kern->aper_base;
210 	info->aperture_size = kern->aper_size * 1024 * 1024;
211 	info->memory_allowed = kern->max_memory << PAGE_SHIFT;
212 	info->memory_used = kern->current_memory << PAGE_SHIFT;
213 	info->id_vendor = kern->device->vendor;
214 	info->id_device = kern->device->device;
215 
216 	return 0;
217 }
218 #endif
219 
220 int radeon_agp_init(struct radeon_device *rdev)
221 {
222 #if IS_ENABLED(CONFIG_AGP)
223 	struct radeon_agpmode_quirk *p = radeon_agpmode_quirk_list;
224 	struct radeon_agp_mode mode;
225 	struct radeon_agp_info info;
226 	uint32_t agp_status;
227 	int default_mode;
228 	bool is_v3;
229 	int ret;
230 
231 	/* Acquire AGP. */
232 	ret = radeon_agp_head_acquire(rdev);
233 	if (ret) {
234 		DRM_ERROR("Unable to acquire AGP: %d\n", ret);
235 		return ret;
236 	}
237 
238 	ret = radeon_agp_head_info(rdev, &info);
239 	if (ret) {
240 		radeon_agp_head_release(rdev);
241 		DRM_ERROR("Unable to get AGP info: %d\n", ret);
242 		return ret;
243 	}
244 
245 	if (rdev->agp->agp_info.aper_size < 32) {
246 		radeon_agp_head_release(rdev);
247 		dev_warn(rdev->dev, "AGP aperture too small (%zuM) "
248 			"need at least 32M, disabling AGP\n",
249 			rdev->agp->agp_info.aper_size);
250 		return -EINVAL;
251 	}
252 
253 	mode.mode = info.mode;
254 	/* chips with the agp to pcie bridge don't have the AGP_STATUS register
255 	 * Just use the whatever mode the host sets up.
256 	 */
257 	if (rdev->family <= CHIP_RV350)
258 		agp_status = (RREG32(RADEON_AGP_STATUS) | RADEON_AGPv3_MODE) & mode.mode;
259 	else
260 		agp_status = mode.mode;
261 	is_v3 = !!(agp_status & RADEON_AGPv3_MODE);
262 
263 	if (is_v3) {
264 		default_mode = (agp_status & RADEON_AGPv3_8X_MODE) ? 8 : 4;
265 	} else {
266 		if (agp_status & RADEON_AGP_4X_MODE) {
267 			default_mode = 4;
268 		} else if (agp_status & RADEON_AGP_2X_MODE) {
269 			default_mode = 2;
270 		} else {
271 			default_mode = 1;
272 		}
273 	}
274 
275 	/* Apply AGPMode Quirks */
276 	while (p && p->chip_device != 0) {
277 		if (info.id_vendor == p->hostbridge_vendor &&
278 		    info.id_device == p->hostbridge_device &&
279 		    rdev->pdev->vendor == p->chip_vendor &&
280 		    rdev->pdev->device == p->chip_device &&
281 		    rdev->pdev->subsystem_vendor == p->subsys_vendor &&
282 		    rdev->pdev->subsystem_device == p->subsys_device) {
283 			default_mode = p->default_mode;
284 		}
285 		++p;
286 	}
287 
288 	if (radeon_agpmode > 0) {
289 		if ((radeon_agpmode < (is_v3 ? 4 : 1)) ||
290 		    (radeon_agpmode > (is_v3 ? 8 : 4)) ||
291 		    (radeon_agpmode & (radeon_agpmode - 1))) {
292 			DRM_ERROR("Illegal AGP Mode: %d (valid %s), leaving at %d\n",
293 				  radeon_agpmode, is_v3 ? "4, 8" : "1, 2, 4",
294 				  default_mode);
295 			radeon_agpmode = default_mode;
296 		} else {
297 			DRM_INFO("AGP mode requested: %d\n", radeon_agpmode);
298 		}
299 	} else {
300 		radeon_agpmode = default_mode;
301 	}
302 
303 	mode.mode &= ~RADEON_AGP_MODE_MASK;
304 	if (is_v3) {
305 		switch (radeon_agpmode) {
306 		case 8:
307 			mode.mode |= RADEON_AGPv3_8X_MODE;
308 			break;
309 		case 4:
310 		default:
311 			mode.mode |= RADEON_AGPv3_4X_MODE;
312 			break;
313 		}
314 	} else {
315 		switch (radeon_agpmode) {
316 		case 4:
317 			mode.mode |= RADEON_AGP_4X_MODE;
318 			break;
319 		case 2:
320 			mode.mode |= RADEON_AGP_2X_MODE;
321 			break;
322 		case 1:
323 		default:
324 			mode.mode |= RADEON_AGP_1X_MODE;
325 			break;
326 		}
327 	}
328 
329 	mode.mode &= ~RADEON_AGP_FW_MODE; /* disable fw */
330 	ret = radeon_agp_head_enable(rdev, mode);
331 	if (ret) {
332 		DRM_ERROR("Unable to enable AGP (mode = 0x%lx)\n", mode.mode);
333 		radeon_agp_head_release(rdev);
334 		return ret;
335 	}
336 
337 	rdev->mc.agp_base = rdev->agp->agp_info.aper_base;
338 	rdev->mc.gtt_size = rdev->agp->agp_info.aper_size << 20;
339 	rdev->mc.gtt_start = rdev->mc.agp_base;
340 	rdev->mc.gtt_end = rdev->mc.gtt_start + rdev->mc.gtt_size - 1;
341 	dev_info(rdev->dev, "GTT: %lluM 0x%08llX - 0x%08llX\n",
342 		rdev->mc.gtt_size >> 20, rdev->mc.gtt_start, rdev->mc.gtt_end);
343 
344 	/* workaround some hw issues */
345 	if (rdev->family < CHIP_R200) {
346 		WREG32(RADEON_AGP_CNTL, RREG32(RADEON_AGP_CNTL) | 0x000e0000);
347 	}
348 	return 0;
349 #else
350 	return 0;
351 #endif
352 }
353 
354 void radeon_agp_resume(struct radeon_device *rdev)
355 {
356 #if IS_ENABLED(CONFIG_AGP)
357 	int r;
358 	if (rdev->flags & RADEON_IS_AGP) {
359 		r = radeon_agp_init(rdev);
360 		if (r)
361 			dev_warn(rdev->dev, "radeon AGP reinit failed\n");
362 	}
363 #endif
364 }
365 
366 void radeon_agp_fini(struct radeon_device *rdev)
367 {
368 #if IS_ENABLED(CONFIG_AGP)
369 	if (rdev->agp && rdev->agp->acquired) {
370 		radeon_agp_head_release(rdev);
371 	}
372 #endif
373 }
374 
375 void radeon_agp_suspend(struct radeon_device *rdev)
376 {
377 	radeon_agp_fini(rdev);
378 }
379