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1// SPDX-License-Identifier: GPL-2.0 OR MIT
2/* Copyright 2017-2019 Qiang Yu <yuq825@gmail.com> */
3
4#include <linux/interrupt.h>
5#include <linux/iopoll.h>
6#include <linux/device.h>
7#include <linux/slab.h>
8
9#include <drm/lima_drm.h>
10
11#include "lima_device.h"
12#include "lima_gp.h"
13#include "lima_regs.h"
14
15#define gp_write(reg, data) writel(data, ip->iomem + reg)
16#define gp_read(reg) readl(ip->iomem + reg)
17
18static irqreturn_t lima_gp_irq_handler(int irq, void *data)
19{
20 struct lima_ip *ip = data;
21 struct lima_device *dev = ip->dev;
22 struct lima_sched_pipe *pipe = dev->pipe + lima_pipe_gp;
23 u32 state = gp_read(LIMA_GP_INT_STAT);
24 u32 status = gp_read(LIMA_GP_STATUS);
25 bool done = false;
26
27 /* for shared irq case */
28 if (!state)
29 return IRQ_NONE;
30
31 if (state & LIMA_GP_IRQ_MASK_ERROR) {
32 dev_err(dev->dev, "gp error irq state=%x status=%x\n",
33 state, status);
34
35 /* mask all interrupts before hard reset */
36 gp_write(LIMA_GP_INT_MASK, 0);
37
38 pipe->error = true;
39 done = true;
40 } else {
41 bool valid = state & (LIMA_GP_IRQ_VS_END_CMD_LST |
42 LIMA_GP_IRQ_PLBU_END_CMD_LST);
43 bool active = status & (LIMA_GP_STATUS_VS_ACTIVE |
44 LIMA_GP_STATUS_PLBU_ACTIVE);
45 done = valid && !active;
46 }
47
48 gp_write(LIMA_GP_INT_CLEAR, state);
49
50 if (done)
51 lima_sched_pipe_task_done(pipe);
52
53 return IRQ_HANDLED;
54}
55
56static void lima_gp_soft_reset_async(struct lima_ip *ip)
57{
58 if (ip->data.async_reset)
59 return;
60
61 gp_write(LIMA_GP_INT_MASK, 0);
62 gp_write(LIMA_GP_INT_CLEAR, LIMA_GP_IRQ_RESET_COMPLETED);
63 gp_write(LIMA_GP_CMD, LIMA_GP_CMD_SOFT_RESET);
64 ip->data.async_reset = true;
65}
66
67static int lima_gp_soft_reset_async_wait(struct lima_ip *ip)
68{
69 struct lima_device *dev = ip->dev;
70 int err;
71 u32 v;
72
73 if (!ip->data.async_reset)
74 return 0;
75
76 err = readl_poll_timeout(ip->iomem + LIMA_GP_INT_RAWSTAT, v,
77 v & LIMA_GP_IRQ_RESET_COMPLETED,
78 0, 100);
79 if (err) {
80 dev_err(dev->dev, "gp soft reset time out\n");
81 return err;
82 }
83
84 gp_write(LIMA_GP_INT_CLEAR, LIMA_GP_IRQ_MASK_ALL);
85 gp_write(LIMA_GP_INT_MASK, LIMA_GP_IRQ_MASK_USED);
86
87 ip->data.async_reset = false;
88 return 0;
89}
90
91static int lima_gp_task_validate(struct lima_sched_pipe *pipe,
92 struct lima_sched_task *task)
93{
94 struct drm_lima_gp_frame *frame = task->frame;
95 u32 *f = frame->frame;
96 (void)pipe;
97
98 if (f[LIMA_GP_VSCL_START_ADDR >> 2] >
99 f[LIMA_GP_VSCL_END_ADDR >> 2] ||
100 f[LIMA_GP_PLBUCL_START_ADDR >> 2] >
101 f[LIMA_GP_PLBUCL_END_ADDR >> 2] ||
102 f[LIMA_GP_PLBU_ALLOC_START_ADDR >> 2] >
103 f[LIMA_GP_PLBU_ALLOC_END_ADDR >> 2])
104 return -EINVAL;
105
106 if (f[LIMA_GP_VSCL_START_ADDR >> 2] ==
107 f[LIMA_GP_VSCL_END_ADDR >> 2] &&
108 f[LIMA_GP_PLBUCL_START_ADDR >> 2] ==
109 f[LIMA_GP_PLBUCL_END_ADDR >> 2])
110 return -EINVAL;
111
112 return 0;
113}
114
115static void lima_gp_task_run(struct lima_sched_pipe *pipe,
116 struct lima_sched_task *task)
117{
118 struct lima_ip *ip = pipe->processor[0];
119 struct drm_lima_gp_frame *frame = task->frame;
120 u32 *f = frame->frame;
121 u32 cmd = 0;
122 int i;
123
124 if (f[LIMA_GP_VSCL_START_ADDR >> 2] !=
125 f[LIMA_GP_VSCL_END_ADDR >> 2])
126 cmd |= LIMA_GP_CMD_START_VS;
127 if (f[LIMA_GP_PLBUCL_START_ADDR >> 2] !=
128 f[LIMA_GP_PLBUCL_END_ADDR >> 2])
129 cmd |= LIMA_GP_CMD_START_PLBU;
130
131 /* before any hw ops, wait last success task async soft reset */
132 lima_gp_soft_reset_async_wait(ip);
133
134 for (i = 0; i < LIMA_GP_FRAME_REG_NUM; i++)
135 writel(f[i], ip->iomem + LIMA_GP_VSCL_START_ADDR + i * 4);
136
137 gp_write(LIMA_GP_CMD, LIMA_GP_CMD_UPDATE_PLBU_ALLOC);
138 gp_write(LIMA_GP_CMD, cmd);
139}
140
141static int lima_gp_hard_reset_poll(struct lima_ip *ip)
142{
143 gp_write(LIMA_GP_PERF_CNT_0_LIMIT, 0xC01A0000);
144 return gp_read(LIMA_GP_PERF_CNT_0_LIMIT) == 0xC01A0000;
145}
146
147static int lima_gp_hard_reset(struct lima_ip *ip)
148{
149 struct lima_device *dev = ip->dev;
150 int ret;
151
152 gp_write(LIMA_GP_PERF_CNT_0_LIMIT, 0xC0FFE000);
153 gp_write(LIMA_GP_INT_MASK, 0);
154 gp_write(LIMA_GP_CMD, LIMA_GP_CMD_RESET);
155 ret = lima_poll_timeout(ip, lima_gp_hard_reset_poll, 10, 100);
156 if (ret) {
157 dev_err(dev->dev, "gp hard reset timeout\n");
158 return ret;
159 }
160
161 gp_write(LIMA_GP_PERF_CNT_0_LIMIT, 0);
162 gp_write(LIMA_GP_INT_CLEAR, LIMA_GP_IRQ_MASK_ALL);
163 gp_write(LIMA_GP_INT_MASK, LIMA_GP_IRQ_MASK_USED);
164 return 0;
165}
166
167static void lima_gp_task_fini(struct lima_sched_pipe *pipe)
168{
169 lima_gp_soft_reset_async(pipe->processor[0]);
170}
171
172static void lima_gp_task_error(struct lima_sched_pipe *pipe)
173{
174 struct lima_ip *ip = pipe->processor[0];
175
176 dev_err(ip->dev->dev, "gp task error int_state=%x status=%x\n",
177 gp_read(LIMA_GP_INT_STAT), gp_read(LIMA_GP_STATUS));
178
179 lima_gp_hard_reset(ip);
180}
181
182static void lima_gp_task_mmu_error(struct lima_sched_pipe *pipe)
183{
184 lima_sched_pipe_task_done(pipe);
185}
186
187static void lima_gp_print_version(struct lima_ip *ip)
188{
189 u32 version, major, minor;
190 char *name;
191
192 version = gp_read(LIMA_GP_VERSION);
193 major = (version >> 8) & 0xFF;
194 minor = version & 0xFF;
195 switch (version >> 16) {
196 case 0xA07:
197 name = "mali200";
198 break;
199 case 0xC07:
200 name = "mali300";
201 break;
202 case 0xB07:
203 name = "mali400";
204 break;
205 case 0xD07:
206 name = "mali450";
207 break;
208 default:
209 name = "unknown";
210 break;
211 }
212 dev_info(ip->dev->dev, "%s - %s version major %d minor %d\n",
213 lima_ip_name(ip), name, major, minor);
214}
215
216static struct kmem_cache *lima_gp_task_slab;
217static int lima_gp_task_slab_refcnt;
218
219int lima_gp_init(struct lima_ip *ip)
220{
221 struct lima_device *dev = ip->dev;
222 int err;
223
224 lima_gp_print_version(ip);
225
226 ip->data.async_reset = false;
227 lima_gp_soft_reset_async(ip);
228 err = lima_gp_soft_reset_async_wait(ip);
229 if (err)
230 return err;
231
232 err = devm_request_irq(dev->dev, ip->irq, lima_gp_irq_handler,
233 IRQF_SHARED, lima_ip_name(ip), ip);
234 if (err) {
235 dev_err(dev->dev, "gp %s fail to request irq\n",
236 lima_ip_name(ip));
237 return err;
238 }
239
240 dev->gp_version = gp_read(LIMA_GP_VERSION);
241
242 return 0;
243}
244
245void lima_gp_fini(struct lima_ip *ip)
246{
247
248}
249
250int lima_gp_pipe_init(struct lima_device *dev)
251{
252 int frame_size = sizeof(struct drm_lima_gp_frame);
253 struct lima_sched_pipe *pipe = dev->pipe + lima_pipe_gp;
254
255 if (!lima_gp_task_slab) {
256 lima_gp_task_slab = kmem_cache_create_usercopy(
257 "lima_gp_task", sizeof(struct lima_sched_task) + frame_size,
258 0, SLAB_HWCACHE_ALIGN, sizeof(struct lima_sched_task),
259 frame_size, NULL);
260 if (!lima_gp_task_slab)
261 return -ENOMEM;
262 }
263 lima_gp_task_slab_refcnt++;
264
265 pipe->frame_size = frame_size;
266 pipe->task_slab = lima_gp_task_slab;
267
268 pipe->task_validate = lima_gp_task_validate;
269 pipe->task_run = lima_gp_task_run;
270 pipe->task_fini = lima_gp_task_fini;
271 pipe->task_error = lima_gp_task_error;
272 pipe->task_mmu_error = lima_gp_task_mmu_error;
273
274 return 0;
275}
276
277void lima_gp_pipe_fini(struct lima_device *dev)
278{
279 if (!--lima_gp_task_slab_refcnt) {
280 kmem_cache_destroy(lima_gp_task_slab);
281 lima_gp_task_slab = NULL;
282 }
283}