1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright 2020-2021 NXP
4  */
5 
6 #include <linux/init.h>
7 #include <linux/interconnect.h>
8 #include <linux/ioctl.h>
9 #include <linux/list.h>
10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/of_device.h>
13 #include <linux/of_address.h>
14 #include <linux/platform_device.h>
15 #include <linux/firmware/imx/ipc.h>
16 #include <linux/firmware/imx/svc/misc.h>
17 #include "vpu.h"
18 #include "vpu_rpc.h"
19 #include "vpu_imx8q.h"
20 #include "vpu_windsor.h"
21 #include "vpu_malone.h"
22 
23 int vpu_iface_check_memory_region(struct vpu_core *core, dma_addr_t addr, u32 size)
24 {
25 	struct vpu_iface_ops *ops = vpu_core_get_iface(core);
26 
27 	if (!ops || !ops->check_memory_region)
28 		return VPU_CORE_MEMORY_INVALID;
29 
30 	return ops->check_memory_region(core->fw.phys, addr, size);
31 }
32 
33 static u32 vpu_rpc_check_buffer_space(struct vpu_rpc_buffer_desc *desc, bool write)
34 {
35 	u32 ptr1;
36 	u32 ptr2;
37 	u32 size;
38 
39 	size = desc->end - desc->start;
40 	if (write) {
41 		ptr1 = desc->wptr;
42 		ptr2 = desc->rptr;
43 	} else {
44 		ptr1 = desc->rptr;
45 		ptr2 = desc->wptr;
46 	}
47 
48 	if (ptr1 == ptr2) {
49 		if (!write)
50 			return 0;
51 		else
52 			return size;
53 	}
54 
55 	return (ptr2 + size - ptr1) % size;
56 }
57 
58 static int vpu_rpc_send_cmd_buf(struct vpu_shared_addr *shared, struct vpu_rpc_event *cmd)
59 {
60 	struct vpu_rpc_buffer_desc *desc;
61 	u32 space = 0;
62 	u32 *data;
63 	u32 wptr;
64 	u32 i;
65 
66 	if (cmd->hdr.num > 0xff || cmd->hdr.num >= ARRAY_SIZE(cmd->data))
67 		return -EINVAL;
68 	desc = shared->cmd_desc;
69 	space = vpu_rpc_check_buffer_space(desc, true);
70 	if (space < (((cmd->hdr.num + 1) << 2) + 16))
71 		return -EINVAL;
72 	wptr = desc->wptr;
73 	data = (u32 *)(shared->cmd_mem_vir + desc->wptr - desc->start);
74 	*data = 0;
75 	*data |= ((cmd->hdr.index & 0xff) << 24);
76 	*data |= ((cmd->hdr.num & 0xff) << 16);
77 	*data |= (cmd->hdr.id & 0x3fff);
78 	wptr += 4;
79 	data++;
80 	if (wptr >= desc->end) {
81 		wptr = desc->start;
82 		data = shared->cmd_mem_vir;
83 	}
84 
85 	for (i = 0; i < cmd->hdr.num; i++) {
86 		*data = cmd->data[i];
87 		wptr += 4;
88 		data++;
89 		if (wptr >= desc->end) {
90 			wptr = desc->start;
91 			data = shared->cmd_mem_vir;
92 		}
93 	}
94 
95 	/*update wptr after data is written*/
96 	mb();
97 	desc->wptr = wptr;
98 
99 	return 0;
100 }
101 
102 static bool vpu_rpc_check_msg(struct vpu_shared_addr *shared)
103 {
104 	struct vpu_rpc_buffer_desc *desc;
105 	u32 space = 0;
106 	u32 msgword;
107 	u32 msgnum;
108 
109 	desc = shared->msg_desc;
110 	space = vpu_rpc_check_buffer_space(desc, 0);
111 	space = (space >> 2);
112 
113 	if (space) {
114 		msgword = *(u32 *)(shared->msg_mem_vir + desc->rptr - desc->start);
115 		msgnum = (msgword & 0xff0000) >> 16;
116 		if (msgnum <= space)
117 			return true;
118 	}
119 
120 	return false;
121 }
122 
123 static int vpu_rpc_receive_msg_buf(struct vpu_shared_addr *shared, struct vpu_rpc_event *msg)
124 {
125 	struct vpu_rpc_buffer_desc *desc;
126 	u32 *data;
127 	u32 msgword;
128 	u32 rptr;
129 	u32 i;
130 
131 	if (!vpu_rpc_check_msg(shared))
132 		return -EINVAL;
133 
134 	desc = shared->msg_desc;
135 	data = (u32 *)(shared->msg_mem_vir + desc->rptr - desc->start);
136 	rptr = desc->rptr;
137 	msgword = *data;
138 	data++;
139 	rptr += 4;
140 	if (rptr >= desc->end) {
141 		rptr = desc->start;
142 		data = shared->msg_mem_vir;
143 	}
144 
145 	msg->hdr.index = (msgword >> 24) & 0xff;
146 	msg->hdr.num = (msgword >> 16) & 0xff;
147 	msg->hdr.id = msgword & 0x3fff;
148 
149 	if (msg->hdr.num > ARRAY_SIZE(msg->data))
150 		return -EINVAL;
151 
152 	for (i = 0; i < msg->hdr.num; i++) {
153 		msg->data[i] = *data;
154 		data++;
155 		rptr += 4;
156 		if (rptr >= desc->end) {
157 			rptr = desc->start;
158 			data = shared->msg_mem_vir;
159 		}
160 	}
161 
162 	/*update rptr after data is read*/
163 	mb();
164 	desc->rptr = rptr;
165 
166 	return 0;
167 }
168 
169 static struct vpu_iface_ops imx8q_rpc_ops[] = {
170 	[VPU_CORE_TYPE_ENC] = {
171 		.check_codec = vpu_imx8q_check_codec,
172 		.check_fmt = vpu_imx8q_check_fmt,
173 		.boot_core = vpu_imx8q_boot_core,
174 		.get_power_state = vpu_imx8q_get_power_state,
175 		.on_firmware_loaded = vpu_imx8q_on_firmware_loaded,
176 		.get_data_size = vpu_windsor_get_data_size,
177 		.check_memory_region = vpu_imx8q_check_memory_region,
178 		.init_rpc = vpu_windsor_init_rpc,
179 		.set_log_buf = vpu_windsor_set_log_buf,
180 		.set_system_cfg = vpu_windsor_set_system_cfg,
181 		.get_version = vpu_windsor_get_version,
182 		.send_cmd_buf = vpu_rpc_send_cmd_buf,
183 		.receive_msg_buf = vpu_rpc_receive_msg_buf,
184 		.pack_cmd = vpu_windsor_pack_cmd,
185 		.convert_msg_id = vpu_windsor_convert_msg_id,
186 		.unpack_msg_data = vpu_windsor_unpack_msg_data,
187 		.config_memory_resource = vpu_windsor_config_memory_resource,
188 		.get_stream_buffer_size = vpu_windsor_get_stream_buffer_size,
189 		.config_stream_buffer = vpu_windsor_config_stream_buffer,
190 		.get_stream_buffer_desc = vpu_windsor_get_stream_buffer_desc,
191 		.update_stream_buffer = vpu_windsor_update_stream_buffer,
192 		.set_encode_params = vpu_windsor_set_encode_params,
193 		.input_frame = vpu_windsor_input_frame,
194 		.get_max_instance_count = vpu_windsor_get_max_instance_count,
195 	},
196 	[VPU_CORE_TYPE_DEC] = {
197 		.check_codec = vpu_imx8q_check_codec,
198 		.check_fmt = vpu_imx8q_check_fmt,
199 		.boot_core = vpu_imx8q_boot_core,
200 		.get_power_state = vpu_imx8q_get_power_state,
201 		.on_firmware_loaded = vpu_imx8q_on_firmware_loaded,
202 		.get_data_size = vpu_malone_get_data_size,
203 		.check_memory_region = vpu_imx8q_check_memory_region,
204 		.init_rpc = vpu_malone_init_rpc,
205 		.set_log_buf = vpu_malone_set_log_buf,
206 		.set_system_cfg = vpu_malone_set_system_cfg,
207 		.get_version = vpu_malone_get_version,
208 		.send_cmd_buf = vpu_rpc_send_cmd_buf,
209 		.receive_msg_buf = vpu_rpc_receive_msg_buf,
210 		.get_stream_buffer_size = vpu_malone_get_stream_buffer_size,
211 		.config_stream_buffer = vpu_malone_config_stream_buffer,
212 		.set_decode_params = vpu_malone_set_decode_params,
213 		.pack_cmd = vpu_malone_pack_cmd,
214 		.convert_msg_id = vpu_malone_convert_msg_id,
215 		.unpack_msg_data = vpu_malone_unpack_msg_data,
216 		.get_stream_buffer_desc = vpu_malone_get_stream_buffer_desc,
217 		.update_stream_buffer = vpu_malone_update_stream_buffer,
218 		.add_scode = vpu_malone_add_scode,
219 		.input_frame = vpu_malone_input_frame,
220 		.pre_send_cmd = vpu_malone_pre_cmd,
221 		.post_send_cmd = vpu_malone_post_cmd,
222 		.init_instance = vpu_malone_init_instance,
223 		.get_max_instance_count = vpu_malone_get_max_instance_count,
224 	},
225 };
226 
227 static struct vpu_iface_ops *vpu_get_iface(struct vpu_dev *vpu, enum vpu_core_type type)
228 {
229 	struct vpu_iface_ops *rpc_ops = NULL;
230 	u32 size = 0;
231 
232 	switch (vpu->res->plat_type) {
233 	case IMX8QXP:
234 	case IMX8QM:
235 		rpc_ops = imx8q_rpc_ops;
236 		size = ARRAY_SIZE(imx8q_rpc_ops);
237 		break;
238 	default:
239 		return NULL;
240 	}
241 
242 	if (type >= size)
243 		return NULL;
244 
245 	return &rpc_ops[type];
246 }
247 
248 struct vpu_iface_ops *vpu_core_get_iface(struct vpu_core *core)
249 {
250 	return vpu_get_iface(core->vpu, core->type);
251 }
252 
253 struct vpu_iface_ops *vpu_inst_get_iface(struct vpu_inst *inst)
254 {
255 	if (inst->core)
256 		return vpu_core_get_iface(inst->core);
257 
258 	return vpu_get_iface(inst->vpu, inst->type);
259 }
260