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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Tegra host1x driver
4 *
5 * Copyright (c) 2010-2013, NVIDIA Corporation.
6 */
7
8#include <linux/clk.h>
9#include <linux/delay.h>
10#include <linux/dma-mapping.h>
11#include <linux/io.h>
12#include <linux/list.h>
13#include <linux/module.h>
14#include <linux/of.h>
15#include <linux/of_platform.h>
16#include <linux/platform_device.h>
17#include <linux/pm_runtime.h>
18#include <linux/slab.h>
19
20#include <soc/tegra/common.h>
21
22#define CREATE_TRACE_POINTS
23#include <trace/events/host1x.h>
24#undef CREATE_TRACE_POINTS
25
26#if IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU)
27#include <asm/dma-iommu.h>
28#endif
29
30#include "bus.h"
31#include "channel.h"
32#include "context.h"
33#include "debug.h"
34#include "dev.h"
35#include "intr.h"
36
37#include "hw/host1x01.h"
38#include "hw/host1x02.h"
39#include "hw/host1x04.h"
40#include "hw/host1x05.h"
41#include "hw/host1x06.h"
42#include "hw/host1x07.h"
43#include "hw/host1x08.h"
44#include "hw/host1x10.h"
45
46void host1x_common_writel(struct host1x *host1x, u32 v, u32 r)
47{
48 writel(v, host1x->common_regs + r);
49}
50
51void host1x_hypervisor_writel(struct host1x *host1x, u32 v, u32 r)
52{
53 writel(v, host1x->hv_regs + r);
54}
55
56u32 host1x_hypervisor_readl(struct host1x *host1x, u32 r)
57{
58 return readl(host1x->hv_regs + r);
59}
60
61void host1x_sync_writel(struct host1x *host1x, u32 v, u32 r)
62{
63 void __iomem *sync_regs = host1x->regs + host1x->info->sync_offset;
64
65 writel(v, sync_regs + r);
66}
67
68u32 host1x_sync_readl(struct host1x *host1x, u32 r)
69{
70 void __iomem *sync_regs = host1x->regs + host1x->info->sync_offset;
71
72 return readl(sync_regs + r);
73}
74
75#ifdef CONFIG_64BIT
76u64 host1x_sync_readq(struct host1x *host1x, u32 r)
77{
78 void __iomem *sync_regs = host1x->regs + host1x->info->sync_offset;
79
80 return readq(sync_regs + r);
81}
82#endif
83
84void host1x_ch_writel(struct host1x_channel *ch, u32 v, u32 r)
85{
86 writel(v, ch->regs + r);
87}
88
89u32 host1x_ch_readl(struct host1x_channel *ch, u32 r)
90{
91 return readl(ch->regs + r);
92}
93
94static const struct host1x_info host1x01_info = {
95 .nb_channels = 8,
96 .nb_pts = 32,
97 .nb_mlocks = 16,
98 .nb_bases = 8,
99 .init = host1x01_init,
100 .sync_offset = 0x3000,
101 .dma_mask = DMA_BIT_MASK(32),
102 .has_wide_gather = false,
103 .has_hypervisor = false,
104 .num_sid_entries = 0,
105 .sid_table = NULL,
106 .reserve_vblank_syncpts = true,
107};
108
109static const struct host1x_info host1x02_info = {
110 .nb_channels = 9,
111 .nb_pts = 32,
112 .nb_mlocks = 16,
113 .nb_bases = 12,
114 .init = host1x02_init,
115 .sync_offset = 0x3000,
116 .dma_mask = DMA_BIT_MASK(32),
117 .has_wide_gather = false,
118 .has_hypervisor = false,
119 .num_sid_entries = 0,
120 .sid_table = NULL,
121 .reserve_vblank_syncpts = true,
122};
123
124static const struct host1x_info host1x04_info = {
125 .nb_channels = 12,
126 .nb_pts = 192,
127 .nb_mlocks = 16,
128 .nb_bases = 64,
129 .init = host1x04_init,
130 .sync_offset = 0x2100,
131 .dma_mask = DMA_BIT_MASK(34),
132 .has_wide_gather = false,
133 .has_hypervisor = false,
134 .num_sid_entries = 0,
135 .sid_table = NULL,
136 .reserve_vblank_syncpts = false,
137};
138
139static const struct host1x_info host1x05_info = {
140 .nb_channels = 14,
141 .nb_pts = 192,
142 .nb_mlocks = 16,
143 .nb_bases = 64,
144 .init = host1x05_init,
145 .sync_offset = 0x2100,
146 .dma_mask = DMA_BIT_MASK(34),
147 .has_wide_gather = false,
148 .has_hypervisor = false,
149 .num_sid_entries = 0,
150 .sid_table = NULL,
151 .reserve_vblank_syncpts = false,
152};
153
154static const struct host1x_sid_entry tegra186_sid_table[] = {
155 { /* SE1 */ .base = 0x1ac8, .offset = 0x90, .limit = 0x90 },
156 { /* SE2 */ .base = 0x1ad0, .offset = 0x90, .limit = 0x90 },
157 { /* SE3 */ .base = 0x1ad8, .offset = 0x90, .limit = 0x90 },
158 { /* SE4 */ .base = 0x1ae0, .offset = 0x90, .limit = 0x90 },
159 { /* ISP */ .base = 0x1ae8, .offset = 0x50, .limit = 0x50 },
160 { /* VIC */ .base = 0x1af0, .offset = 0x30, .limit = 0x34 },
161 { /* NVENC */ .base = 0x1af8, .offset = 0x30, .limit = 0x34 },
162 { /* NVDEC */ .base = 0x1b00, .offset = 0x30, .limit = 0x34 },
163 { /* NVJPG */ .base = 0x1b08, .offset = 0x30, .limit = 0x34 },
164 { /* TSEC */ .base = 0x1b10, .offset = 0x30, .limit = 0x34 },
165 { /* TSECB */ .base = 0x1b18, .offset = 0x30, .limit = 0x34 },
166 { /* VI 0 */ .base = 0x1b80, .offset = 0x10000, .limit = 0x10000 },
167 { /* VI 1 */ .base = 0x1b88, .offset = 0x20000, .limit = 0x20000 },
168 { /* VI 2 */ .base = 0x1b90, .offset = 0x30000, .limit = 0x30000 },
169 { /* VI 3 */ .base = 0x1b98, .offset = 0x40000, .limit = 0x40000 },
170 { /* VI 4 */ .base = 0x1ba0, .offset = 0x50000, .limit = 0x50000 },
171 { /* VI 5 */ .base = 0x1ba8, .offset = 0x60000, .limit = 0x60000 },
172 { /* VI 6 */ .base = 0x1bb0, .offset = 0x70000, .limit = 0x70000 },
173 { /* VI 7 */ .base = 0x1bb8, .offset = 0x80000, .limit = 0x80000 },
174 { /* VI 8 */ .base = 0x1bc0, .offset = 0x90000, .limit = 0x90000 },
175 { /* VI 9 */ .base = 0x1bc8, .offset = 0xa0000, .limit = 0xa0000 },
176 { /* VI 10 */ .base = 0x1bd0, .offset = 0xb0000, .limit = 0xb0000 },
177 { /* VI 11 */ .base = 0x1bd8, .offset = 0xc0000, .limit = 0xc0000 },
178};
179
180static const struct host1x_info host1x06_info = {
181 .nb_channels = 63,
182 .nb_pts = 576,
183 .nb_mlocks = 24,
184 .nb_bases = 16,
185 .init = host1x06_init,
186 .sync_offset = 0x0,
187 .dma_mask = DMA_BIT_MASK(40),
188 .has_wide_gather = true,
189 .has_hypervisor = true,
190 .num_sid_entries = ARRAY_SIZE(tegra186_sid_table),
191 .sid_table = tegra186_sid_table,
192 .reserve_vblank_syncpts = false,
193 .skip_reset_assert = true,
194};
195
196static const struct host1x_sid_entry tegra194_sid_table[] = {
197 { /* SE1 */ .base = 0x1ac8, .offset = 0x90, .limit = 0x90 },
198 { /* SE2 */ .base = 0x1ad0, .offset = 0x90, .limit = 0x90 },
199 { /* SE3 */ .base = 0x1ad8, .offset = 0x90, .limit = 0x90 },
200 { /* SE4 */ .base = 0x1ae0, .offset = 0x90, .limit = 0x90 },
201 { /* ISP */ .base = 0x1ae8, .offset = 0x800, .limit = 0x800 },
202 { /* VIC */ .base = 0x1af0, .offset = 0x30, .limit = 0x34 },
203 { /* NVENC */ .base = 0x1af8, .offset = 0x30, .limit = 0x34 },
204 { /* NVDEC */ .base = 0x1b00, .offset = 0x30, .limit = 0x34 },
205 { /* NVJPG */ .base = 0x1b08, .offset = 0x30, .limit = 0x34 },
206 { /* TSEC */ .base = 0x1b10, .offset = 0x30, .limit = 0x34 },
207 { /* TSECB */ .base = 0x1b18, .offset = 0x30, .limit = 0x34 },
208 { /* VI */ .base = 0x1b80, .offset = 0x800, .limit = 0x800 },
209 { /* VI_THI */ .base = 0x1b88, .offset = 0x30, .limit = 0x34 },
210 { /* ISP_THI */ .base = 0x1b90, .offset = 0x30, .limit = 0x34 },
211 { /* PVA0_CLUSTER */ .base = 0x1b98, .offset = 0x0, .limit = 0x0 },
212 { /* PVA0_CLUSTER */ .base = 0x1ba0, .offset = 0x0, .limit = 0x0 },
213 { /* NVDLA0 */ .base = 0x1ba8, .offset = 0x30, .limit = 0x34 },
214 { /* NVDLA1 */ .base = 0x1bb0, .offset = 0x30, .limit = 0x34 },
215 { /* NVENC1 */ .base = 0x1bb8, .offset = 0x30, .limit = 0x34 },
216 { /* NVDEC1 */ .base = 0x1bc0, .offset = 0x30, .limit = 0x34 },
217};
218
219static const struct host1x_info host1x07_info = {
220 .nb_channels = 63,
221 .nb_pts = 704,
222 .nb_mlocks = 32,
223 .nb_bases = 0,
224 .init = host1x07_init,
225 .sync_offset = 0x0,
226 .dma_mask = DMA_BIT_MASK(40),
227 .has_wide_gather = true,
228 .has_hypervisor = true,
229 .num_sid_entries = ARRAY_SIZE(tegra194_sid_table),
230 .sid_table = tegra194_sid_table,
231 .reserve_vblank_syncpts = false,
232};
233
234/*
235 * Tegra234 has two stream ID protection tables, one for setting stream IDs
236 * through the channel path via SETSTREAMID, and one for setting them via
237 * MMIO. We program each engine's data stream ID in the channel path table
238 * and firmware stream ID in the MMIO path table.
239 */
240static const struct host1x_sid_entry tegra234_sid_table[] = {
241 { /* SE1 MMIO */ .base = 0x1650, .offset = 0x90, .limit = 0x90 },
242 { /* SE1 ch */ .base = 0x1730, .offset = 0x90, .limit = 0x90 },
243 { /* SE2 MMIO */ .base = 0x1658, .offset = 0x90, .limit = 0x90 },
244 { /* SE2 ch */ .base = 0x1738, .offset = 0x90, .limit = 0x90 },
245 { /* SE4 MMIO */ .base = 0x1660, .offset = 0x90, .limit = 0x90 },
246 { /* SE4 ch */ .base = 0x1740, .offset = 0x90, .limit = 0x90 },
247 { /* ISP MMIO */ .base = 0x1680, .offset = 0x800, .limit = 0x800 },
248 { /* VIC MMIO */ .base = 0x1688, .offset = 0x34, .limit = 0x34 },
249 { /* VIC ch */ .base = 0x17b8, .offset = 0x30, .limit = 0x30 },
250 { /* NVENC MMIO */ .base = 0x1690, .offset = 0x34, .limit = 0x34 },
251 { /* NVENC ch */ .base = 0x17c0, .offset = 0x30, .limit = 0x30 },
252 { /* NVDEC MMIO */ .base = 0x1698, .offset = 0x34, .limit = 0x34 },
253 { /* NVDEC ch */ .base = 0x17c8, .offset = 0x30, .limit = 0x30 },
254 { /* NVJPG MMIO */ .base = 0x16a0, .offset = 0x34, .limit = 0x34 },
255 { /* NVJPG ch */ .base = 0x17d0, .offset = 0x30, .limit = 0x30 },
256 { /* TSEC MMIO */ .base = 0x16a8, .offset = 0x30, .limit = 0x34 },
257 { /* NVJPG1 MMIO */ .base = 0x16b0, .offset = 0x34, .limit = 0x34 },
258 { /* NVJPG1 ch */ .base = 0x17a8, .offset = 0x30, .limit = 0x30 },
259 { /* VI MMIO */ .base = 0x16b8, .offset = 0x800, .limit = 0x800 },
260 { /* VI_THI MMIO */ .base = 0x16c0, .offset = 0x30, .limit = 0x34 },
261 { /* ISP_THI MMIO */ .base = 0x16c8, .offset = 0x30, .limit = 0x34 },
262 { /* NVDLA MMIO */ .base = 0x16d8, .offset = 0x30, .limit = 0x34 },
263 { /* NVDLA ch */ .base = 0x17e0, .offset = 0x30, .limit = 0x34 },
264 { /* NVDLA1 MMIO */ .base = 0x16e0, .offset = 0x30, .limit = 0x34 },
265 { /* NVDLA1 ch */ .base = 0x17e8, .offset = 0x30, .limit = 0x34 },
266 { /* OFA MMIO */ .base = 0x16e8, .offset = 0x34, .limit = 0x34 },
267 { /* OFA ch */ .base = 0x1768, .offset = 0x30, .limit = 0x30 },
268 { /* VI2 MMIO */ .base = 0x16f0, .offset = 0x800, .limit = 0x800 },
269 { /* VI2_THI MMIO */ .base = 0x16f8, .offset = 0x30, .limit = 0x34 },
270};
271
272static const struct host1x_info host1x08_info = {
273 .nb_channels = 63,
274 .nb_pts = 1024,
275 .nb_mlocks = 24,
276 .nb_bases = 0,
277 .init = host1x08_init,
278 .sync_offset = 0x0,
279 .dma_mask = DMA_BIT_MASK(40),
280 .has_wide_gather = true,
281 .has_hypervisor = true,
282 .has_common = true,
283 .num_sid_entries = ARRAY_SIZE(tegra234_sid_table),
284 .sid_table = tegra234_sid_table,
285 .streamid_vm_table = { 0x1004, 128 },
286 .classid_vm_table = { 0x1404, 25 },
287 .mmio_vm_table = { 0x1504, 25 },
288 .reserve_vblank_syncpts = false,
289};
290
291static const struct host1x_sid_entry tegra264_sid_table[] = {
292 { /* SE1 MMIO */ .base = 0x1650, .offset = 0x90, .limit = 0x90 },
293 { /* SE2 MMIO */ .base = 0x1658, .offset = 0x90, .limit = 0x90 },
294 { /* SE4 MMIO */ .base = 0x1660, .offset = 0x90, .limit = 0x90 },
295 { /* SE1 ch */ .base = 0x1738, .offset = 0x90, .limit = 0x90 },
296 { /* SE2 ch */ .base = 0x1740, .offset = 0x90, .limit = 0x90 },
297 { /* SE4 ch */ .base = 0x1748, .offset = 0x90, .limit = 0x90 },
298 { /* VIC ch */ .base = 0x1790, .offset = 0x30, .limit = 0x30 },
299 { /* VIC MMIO */ .base = 0x1688, .offset = 0x34, .limit = 0x34 },
300 { /* TSEC MMIO */ .base = 0x1690, .offset = 0x30, .limit = 0x34 },
301 { /* VI MMIO */ .base = 0x1698, .offset = 0x800, .limit = 0x800 },
302 { /* VI_THI MMIO */ .base = 0x16a0, .offset = 0x30, .limit = 0x34 },
303 { /* ISP MMIO */ .base = 0x1680, .offset = 0x800, .limit = 0x800 },
304 { /* ISP_THI MMIO */ .base = 0x16a8, .offset = 0x30, .limit = 0x34 },
305 { /* VI2 MMIO */ .base = 0x16b8, .offset = 0x800, .limit = 0x800 },
306 { /* VI2_THI MMIO */ .base = 0x16c0, .offset = 0x30, .limit = 0x34 },
307 { /* ISP1 MMIO */ .base = 0x16c8, .offset = 0x800, .limit = 0x800 },
308 { /* ISP1_THI MMIO */ .base = 0x16d0, .offset = 0x30, .limit = 0x34 },
309};
310
311static const struct host1x_info host1x10_info = {
312 .nb_channels = 63,
313 .nb_pts = 1024,
314 .nb_mlocks = 24,
315 .nb_bases = 0,
316 .init = host1x10_init,
317 .sync_offset = 0x0,
318 .dma_mask = DMA_BIT_MASK(40),
319 .has_wide_gather = true,
320 .has_hypervisor = true,
321 .has_common = true,
322 .num_sid_entries = ARRAY_SIZE(tegra264_sid_table),
323 .sid_table = tegra264_sid_table,
324 .streamid_vm_table = { 0x1004, 128 },
325 .classid_vm_table = { 0x1404, 25 },
326 .mmio_vm_table = { 0x1504, 25 },
327 .reserve_vblank_syncpts = false,
328};
329
330static const struct of_device_id host1x_of_match[] = {
331 { .compatible = "nvidia,tegra264-host1x", .data = &host1x10_info, },
332 { .compatible = "nvidia,tegra234-host1x", .data = &host1x08_info, },
333 { .compatible = "nvidia,tegra194-host1x", .data = &host1x07_info, },
334 { .compatible = "nvidia,tegra186-host1x", .data = &host1x06_info, },
335 { .compatible = "nvidia,tegra210-host1x", .data = &host1x05_info, },
336 { .compatible = "nvidia,tegra124-host1x", .data = &host1x04_info, },
337 { .compatible = "nvidia,tegra114-host1x", .data = &host1x02_info, },
338 { .compatible = "nvidia,tegra30-host1x", .data = &host1x01_info, },
339 { .compatible = "nvidia,tegra20-host1x", .data = &host1x01_info, },
340 { },
341};
342MODULE_DEVICE_TABLE(of, host1x_of_match);
343
344static void host1x_setup_virtualization_tables(struct host1x *host)
345{
346 const struct host1x_info *info = host->info;
347 unsigned int i;
348
349 if (!info->has_hypervisor)
350 return;
351
352 for (i = 0; i < info->num_sid_entries; i++) {
353 const struct host1x_sid_entry *entry = &info->sid_table[i];
354
355 host1x_hypervisor_writel(host, entry->offset, entry->base);
356 host1x_hypervisor_writel(host, entry->limit, entry->base + 4);
357 }
358
359 for (i = 0; i < info->streamid_vm_table.count; i++) {
360 /* Allow access to all stream IDs to all VMs. */
361 host1x_hypervisor_writel(host, 0xff, info->streamid_vm_table.base + 4 * i);
362 }
363
364 for (i = 0; i < info->classid_vm_table.count; i++) {
365 /* Allow access to all classes to all VMs. */
366 host1x_hypervisor_writel(host, 0xff, info->classid_vm_table.base + 4 * i);
367 }
368
369 for (i = 0; i < info->mmio_vm_table.count; i++) {
370 /* Use VM1 (that's us) as originator VMID for engine MMIO accesses. */
371 host1x_hypervisor_writel(host, 0x1, info->mmio_vm_table.base + 4 * i);
372 }
373}
374
375static bool host1x_wants_iommu(struct host1x *host1x)
376{
377 /* Our IOMMU usage policy doesn't currently play well with GART */
378 if (of_machine_is_compatible("nvidia,tegra20"))
379 return false;
380
381 /*
382 * If we support addressing a maximum of 32 bits of physical memory
383 * and if the host1x firewall is enabled, there's no need to enable
384 * IOMMU support. This can happen for example on Tegra20, Tegra30
385 * and Tegra114.
386 *
387 * Tegra124 and later can address up to 34 bits of physical memory and
388 * many platforms come equipped with more than 2 GiB of system memory,
389 * which requires crossing the 4 GiB boundary. But there's a catch: on
390 * SoCs before Tegra186 (i.e. Tegra124 and Tegra210), the host1x can
391 * only address up to 32 bits of memory in GATHER opcodes, which means
392 * that command buffers need to either be in the first 2 GiB of system
393 * memory (which could quickly lead to memory exhaustion), or command
394 * buffers need to be treated differently from other buffers (which is
395 * not possible with the current ABI).
396 *
397 * A third option is to use the IOMMU in these cases to make sure all
398 * buffers will be mapped into a 32-bit IOVA space that host1x can
399 * address. This allows all of the system memory to be used and works
400 * within the limitations of the host1x on these SoCs.
401 *
402 * In summary, default to enable IOMMU on Tegra124 and later. For any
403 * of the earlier SoCs, only use the IOMMU for additional safety when
404 * the host1x firewall is disabled.
405 */
406 if (host1x->info->dma_mask <= DMA_BIT_MASK(32)) {
407 if (IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL))
408 return false;
409 }
410
411 return true;
412}
413
414/*
415 * Returns ERR_PTR on failure, NULL if the translation is IDENTITY, otherwise a
416 * valid paging domain.
417 */
418static struct iommu_domain *host1x_iommu_attach(struct host1x *host)
419{
420 struct iommu_domain *domain = iommu_get_domain_for_dev(host->dev);
421 int err;
422
423#if IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU)
424 if (host->dev->archdata.mapping) {
425 struct dma_iommu_mapping *mapping =
426 to_dma_iommu_mapping(host->dev);
427 arm_iommu_detach_device(host->dev);
428 arm_iommu_release_mapping(mapping);
429
430 domain = iommu_get_domain_for_dev(host->dev);
431 }
432#endif
433
434 /*
435 * We may not always want to enable IOMMU support (for example if the
436 * host1x firewall is already enabled and we don't support addressing
437 * more than 32 bits of physical memory), so check for that first.
438 *
439 * Similarly, if host1x is already attached to an IOMMU (via the DMA
440 * API), don't try to attach again.
441 */
442 if (domain && domain->type == IOMMU_DOMAIN_IDENTITY)
443 domain = NULL;
444 if (!host1x_wants_iommu(host) || domain)
445 return domain;
446
447 host->group = iommu_group_get(host->dev);
448 if (host->group) {
449 struct iommu_domain_geometry *geometry;
450 dma_addr_t start, end;
451 unsigned long order;
452
453 err = iova_cache_get();
454 if (err < 0)
455 goto put_group;
456
457 host->domain = iommu_paging_domain_alloc(host->dev);
458 if (IS_ERR(host->domain)) {
459 err = PTR_ERR(host->domain);
460 host->domain = NULL;
461 goto put_cache;
462 }
463
464 err = iommu_attach_group(host->domain, host->group);
465 if (err) {
466 if (err == -ENODEV)
467 err = 0;
468
469 goto free_domain;
470 }
471
472 geometry = &host->domain->geometry;
473 start = geometry->aperture_start & host->info->dma_mask;
474 end = geometry->aperture_end & host->info->dma_mask;
475
476 order = __ffs(host->domain->pgsize_bitmap);
477 init_iova_domain(&host->iova, 1UL << order, start >> order);
478 host->iova_end = end;
479
480 domain = host->domain;
481 }
482
483 return domain;
484
485free_domain:
486 iommu_domain_free(host->domain);
487 host->domain = NULL;
488put_cache:
489 iova_cache_put();
490put_group:
491 iommu_group_put(host->group);
492 host->group = NULL;
493
494 return ERR_PTR(err);
495}
496
497static int host1x_iommu_init(struct host1x *host)
498{
499 u64 mask = host->info->dma_mask;
500 struct iommu_domain *domain;
501 int err;
502
503 domain = host1x_iommu_attach(host);
504 if (IS_ERR(domain)) {
505 err = PTR_ERR(domain);
506 dev_err(host->dev, "failed to attach to IOMMU: %d\n", err);
507 return err;
508 }
509
510 /*
511 * If we're not behind an IOMMU make sure we don't get push buffers
512 * that are allocated outside of the range addressable by the GATHER
513 * opcode.
514 *
515 * Newer generations of Tegra (Tegra186 and later) support a wide
516 * variant of the GATHER opcode that allows addressing more bits.
517 */
518 if (!domain && !host->info->has_wide_gather)
519 mask = DMA_BIT_MASK(32);
520
521 err = dma_coerce_mask_and_coherent(host->dev, mask);
522 if (err < 0) {
523 dev_err(host->dev, "failed to set DMA mask: %d\n", err);
524 return err;
525 }
526
527 return 0;
528}
529
530static void host1x_iommu_exit(struct host1x *host)
531{
532 if (host->domain) {
533 put_iova_domain(&host->iova);
534 iommu_detach_group(host->domain, host->group);
535
536 iommu_domain_free(host->domain);
537 host->domain = NULL;
538
539 iova_cache_put();
540
541 iommu_group_put(host->group);
542 host->group = NULL;
543 }
544}
545
546static int host1x_get_resets(struct host1x *host)
547{
548 int err;
549
550 host->resets[0].id = "mc";
551 host->resets[1].id = "host1x";
552 host->nresets = ARRAY_SIZE(host->resets);
553
554 err = devm_reset_control_bulk_get_optional_exclusive_released(
555 host->dev, host->nresets, host->resets);
556 if (err) {
557 dev_err(host->dev, "failed to get reset: %d\n", err);
558 return err;
559 }
560
561 return 0;
562}
563
564static int host1x_probe(struct platform_device *pdev)
565{
566 struct host1x *host;
567 int err, i;
568
569 host = devm_kzalloc(&pdev->dev, sizeof(*host), GFP_KERNEL);
570 if (!host)
571 return -ENOMEM;
572
573 host->info = of_device_get_match_data(&pdev->dev);
574
575 if (host->info->has_hypervisor) {
576 host->regs = devm_platform_ioremap_resource_byname(pdev, "vm");
577 if (IS_ERR(host->regs))
578 return PTR_ERR(host->regs);
579
580 host->hv_regs = devm_platform_ioremap_resource_byname(pdev, "hypervisor");
581 if (IS_ERR(host->hv_regs))
582 return PTR_ERR(host->hv_regs);
583
584 if (host->info->has_common) {
585 host->common_regs = devm_platform_ioremap_resource_byname(pdev, "common");
586 if (IS_ERR(host->common_regs))
587 return PTR_ERR(host->common_regs);
588 }
589 } else {
590 host->regs = devm_platform_ioremap_resource(pdev, 0);
591 if (IS_ERR(host->regs))
592 return PTR_ERR(host->regs);
593 }
594
595 for (i = 0; i < ARRAY_SIZE(host->syncpt_irqs); i++) {
596 char irq_name[] = "syncptX";
597
598 sprintf(irq_name, "syncpt%d", i);
599
600 err = platform_get_irq_byname_optional(pdev, irq_name);
601 if (err == -ENXIO)
602 break;
603 if (err < 0)
604 return err;
605
606 host->syncpt_irqs[i] = err;
607 }
608
609 host->num_syncpt_irqs = i;
610
611 /* Device tree without irq names */
612 if (i == 0) {
613 host->syncpt_irqs[0] = platform_get_irq(pdev, 0);
614 if (host->syncpt_irqs[0] < 0)
615 return host->syncpt_irqs[0];
616
617 host->num_syncpt_irqs = 1;
618 }
619
620 mutex_init(&host->devices_lock);
621 INIT_LIST_HEAD(&host->devices);
622 INIT_LIST_HEAD(&host->list);
623 host->dev = &pdev->dev;
624
625 /* set common host1x device data */
626 platform_set_drvdata(pdev, host);
627
628 host->dev->dma_parms = &host->dma_parms;
629 dma_set_max_seg_size(host->dev, UINT_MAX);
630
631 if (host->info->init) {
632 err = host->info->init(host);
633 if (err)
634 return err;
635 }
636
637 host->clk = devm_clk_get(&pdev->dev, NULL);
638 if (IS_ERR(host->clk))
639 return dev_err_probe(&pdev->dev, PTR_ERR(host->clk), "failed to get clock\n");
640
641 err = host1x_get_resets(host);
642 if (err)
643 return err;
644
645 host1x_bo_cache_init(&host->cache);
646
647 err = host1x_iommu_init(host);
648 if (err < 0) {
649 dev_err(&pdev->dev, "failed to setup IOMMU: %d\n", err);
650 goto destroy_cache;
651 }
652
653 err = host1x_channel_list_init(&host->channel_list,
654 host->info->nb_channels);
655 if (err) {
656 dev_err(&pdev->dev, "failed to initialize channel list\n");
657 goto iommu_exit;
658 }
659
660 err = host1x_memory_context_list_init(host);
661 if (err) {
662 dev_err(&pdev->dev, "failed to initialize context list\n");
663 goto free_channels;
664 }
665
666 err = host1x_syncpt_init(host);
667 if (err) {
668 dev_err(&pdev->dev, "failed to initialize syncpts\n");
669 goto free_contexts;
670 }
671
672 mutex_init(&host->intr_mutex);
673
674 pm_runtime_enable(&pdev->dev);
675
676 err = devm_tegra_core_dev_init_opp_table_common(&pdev->dev);
677 if (err)
678 goto pm_disable;
679
680 /* the driver's code isn't ready yet for the dynamic RPM */
681 err = pm_runtime_resume_and_get(&pdev->dev);
682 if (err)
683 goto pm_disable;
684
685 err = host1x_intr_init(host);
686 if (err) {
687 dev_err(&pdev->dev, "failed to initialize interrupts\n");
688 goto pm_put;
689 }
690
691 host1x_debug_init(host);
692
693 err = host1x_register(host);
694 if (err < 0)
695 goto deinit_debugfs;
696
697 err = devm_of_platform_populate(&pdev->dev);
698 if (err < 0)
699 goto unregister;
700
701 return 0;
702
703unregister:
704 host1x_unregister(host);
705deinit_debugfs:
706 host1x_debug_deinit(host);
707 host1x_intr_deinit(host);
708pm_put:
709 pm_runtime_put_sync_suspend(&pdev->dev);
710pm_disable:
711 pm_runtime_disable(&pdev->dev);
712 host1x_syncpt_deinit(host);
713free_contexts:
714 host1x_memory_context_list_free(&host->context_list);
715free_channels:
716 host1x_channel_list_free(&host->channel_list);
717iommu_exit:
718 host1x_iommu_exit(host);
719destroy_cache:
720 host1x_bo_cache_destroy(&host->cache);
721
722 return err;
723}
724
725static void host1x_remove(struct platform_device *pdev)
726{
727 struct host1x *host = platform_get_drvdata(pdev);
728
729 host1x_unregister(host);
730 host1x_debug_deinit(host);
731
732 pm_runtime_force_suspend(&pdev->dev);
733
734 host1x_intr_deinit(host);
735 host1x_syncpt_deinit(host);
736 host1x_memory_context_list_free(&host->context_list);
737 host1x_channel_list_free(&host->channel_list);
738 host1x_iommu_exit(host);
739 host1x_bo_cache_destroy(&host->cache);
740}
741
742static int __maybe_unused host1x_runtime_suspend(struct device *dev)
743{
744 struct host1x *host = dev_get_drvdata(dev);
745 int err;
746
747 host1x_channel_stop_all(host);
748 host1x_intr_stop(host);
749 host1x_syncpt_save(host);
750
751 if (!host->info->skip_reset_assert) {
752 err = reset_control_bulk_assert(host->nresets, host->resets);
753 if (err) {
754 dev_err(dev, "failed to assert reset: %d\n", err);
755 goto resume_host1x;
756 }
757
758 usleep_range(1000, 2000);
759 }
760
761 clk_disable_unprepare(host->clk);
762 reset_control_bulk_release(host->nresets, host->resets);
763
764 return 0;
765
766resume_host1x:
767 host1x_setup_virtualization_tables(host);
768 host1x_syncpt_restore(host);
769 host1x_intr_start(host);
770
771 return err;
772}
773
774static int __maybe_unused host1x_runtime_resume(struct device *dev)
775{
776 struct host1x *host = dev_get_drvdata(dev);
777 int err;
778
779 err = reset_control_bulk_acquire(host->nresets, host->resets);
780 if (err) {
781 dev_err(dev, "failed to acquire reset: %d\n", err);
782 return err;
783 }
784
785 err = clk_prepare_enable(host->clk);
786 if (err) {
787 dev_err(dev, "failed to enable clock: %d\n", err);
788 goto release_reset;
789 }
790
791 err = reset_control_bulk_deassert(host->nresets, host->resets);
792 if (err < 0) {
793 dev_err(dev, "failed to deassert reset: %d\n", err);
794 goto disable_clk;
795 }
796
797 host1x_setup_virtualization_tables(host);
798 host1x_syncpt_restore(host);
799 host1x_intr_start(host);
800
801 return 0;
802
803disable_clk:
804 clk_disable_unprepare(host->clk);
805release_reset:
806 reset_control_bulk_release(host->nresets, host->resets);
807
808 return err;
809}
810
811static const struct dev_pm_ops host1x_pm_ops = {
812 SET_RUNTIME_PM_OPS(host1x_runtime_suspend, host1x_runtime_resume,
813 NULL)
814 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
815};
816
817static struct platform_driver tegra_host1x_driver = {
818 .driver = {
819 .name = "tegra-host1x",
820 .of_match_table = host1x_of_match,
821 .pm = &host1x_pm_ops,
822 },
823 .probe = host1x_probe,
824 .remove = host1x_remove,
825};
826
827static struct platform_driver * const drivers[] = {
828 &tegra_host1x_driver,
829 &tegra_mipi_driver,
830};
831
832static int __init tegra_host1x_init(void)
833{
834 int err;
835
836 err = bus_register(&host1x_bus_type);
837 if (err < 0)
838 return err;
839
840 err = platform_register_drivers(drivers, ARRAY_SIZE(drivers));
841 if (err < 0)
842 bus_unregister(&host1x_bus_type);
843
844 return err;
845}
846module_init(tegra_host1x_init);
847
848static void __exit tegra_host1x_exit(void)
849{
850 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
851 bus_unregister(&host1x_bus_type);
852}
853module_exit(tegra_host1x_exit);
854
855/**
856 * host1x_get_dma_mask() - query the supported DMA mask for host1x
857 * @host1x: host1x instance
858 *
859 * Note that this returns the supported DMA mask for host1x, which can be
860 * different from the applicable DMA mask under certain circumstances.
861 */
862u64 host1x_get_dma_mask(struct host1x *host1x)
863{
864 return host1x->info->dma_mask;
865}
866EXPORT_SYMBOL(host1x_get_dma_mask);
867
868MODULE_SOFTDEP("post: tegra-drm");
869MODULE_AUTHOR("Thierry Reding <[email protected]>");
870MODULE_AUTHOR("Terje Bergstrom <[email protected]>");
871MODULE_DESCRIPTION("Host1x driver for Tegra products");
872MODULE_LICENSE("GPL");