1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Copyright (c) 2010-2020 NVIDIA Corporation */
19 	if (fw->pos == fw->end)  in fw_next()
20 		return -EINVAL;  in fw_next()
22 	*word = fw->data[fw->pos++];  in fw_next()
27 static bool fw_check_addr_valid(struct tegra_drm_firewall *fw, u32 offset)  in fw_check_addr_valid()  argument
31 	for (i = 0; i < fw->submit->num_used_mappings; i++) {  in fw_check_addr_valid()
32 		struct tegra_drm_mapping *m = fw->submit->used_mappings[i].mapping;  in fw_check_addr_valid()
34 		if (offset >= m->iova && offset <= m->iova_end)  in fw_check_addr_valid()
41 static int fw_check_reg(struct tegra_drm_firewall *fw, u32 offset)  in fw_check_reg()  argument
51 	if (!fw->client->ops->is_addr_reg)  in fw_check_reg()
54 	is_addr = fw->client->ops->is_addr_reg(fw->client->base.dev, fw->class,  in fw_check_reg()
55 					       offset);  in fw_check_reg()
61 		return -EINVAL;  in fw_check_reg()
66 static int fw_check_regs_seq(struct tegra_drm_firewall *fw, u32 offset,  in fw_check_regs_seq()  argument
72 		if (fw_check_reg(fw, offset))  in fw_check_regs_seq()
73 			return -EINVAL;  in fw_check_regs_seq()
76 			offset++;  in fw_check_regs_seq()
82 static int fw_check_regs_mask(struct tegra_drm_firewall *fw, u32 offset,  in fw_check_regs_mask()  argument
89 		if (fw_check_reg(fw, offset+bit))  in fw_check_regs_mask()
90 			return -EINVAL;  in fw_check_regs_mask()
96 static int fw_check_regs_imm(struct tegra_drm_firewall *fw, u32 offset)  in fw_check_regs_imm()  argument
100 	if (!fw->client->ops->is_addr_reg)  in fw_check_regs_imm()
103 	is_addr = fw->client->ops->is_addr_reg(fw->client->base.dev, fw->class,  in fw_check_regs_imm()
104 					       offset);  in fw_check_regs_imm()
106 		return -EINVAL;  in fw_check_regs_imm()
113 	if (!fw->client->ops->is_valid_class) {  in fw_check_class()
114 		if (class == fw->client->base.class)  in fw_check_class()
117 			return -EINVAL;  in fw_check_class()
120 	if (!fw->client->ops->is_valid_class(class))  in fw_check_class()
121 		return -EINVAL;  in fw_check_class()
161 		u32 word, opcode, offset, count, mask, class;  in tegra_drm_fw_validate()  local
171 			offset = word >> 16 & 0xfff;  in tegra_drm_fw_validate()
178 				err = fw_check_regs_mask(&fw, offset, mask);  in tegra_drm_fw_validate()
180 				dev_warn(client->base.dev,  in tegra_drm_fw_validate()
181 					 "illegal SETCLASS(offset=0x%x, mask=0x%x, class=0x%x) at word %u",  in tegra_drm_fw_validate()
182 					 offset, mask, class, fw.pos-1);  in tegra_drm_fw_validate()
185 			offset = (word >> 16) & 0xfff;  in tegra_drm_fw_validate()
187 			err = fw_check_regs_seq(&fw, offset, count, true);  in tegra_drm_fw_validate()
189 				dev_warn(client->base.dev,  in tegra_drm_fw_validate()
190 					 "illegal INCR(offset=0x%x, count=%u) in class 0x%x at word %u",  in tegra_drm_fw_validate()
191 					 offset, count, fw.class, fw.pos-1);  in tegra_drm_fw_validate()
194 			offset = (word >> 16) & 0xfff;  in tegra_drm_fw_validate()
196 			err = fw_check_regs_seq(&fw, offset, count, false);  in tegra_drm_fw_validate()
198 				dev_warn(client->base.dev,  in tegra_drm_fw_validate()
199 					 "illegal NONINCR(offset=0x%x, count=%u) in class 0x%x at word %u",  in tegra_drm_fw_validate()
200 					 offset, count, fw.class, fw.pos-1);  in tegra_drm_fw_validate()
203 			offset = (word >> 16) & 0xfff;  in tegra_drm_fw_validate()
205 			err = fw_check_regs_mask(&fw, offset, mask);  in tegra_drm_fw_validate()
207 				dev_warn(client->base.dev,  in tegra_drm_fw_validate()
208 					 "illegal MASK(offset=0x%x, mask=0x%x) in class 0x%x at word %u",  in tegra_drm_fw_validate()
209 					 offset, mask, fw.class, fw.pos-1);  in tegra_drm_fw_validate()
213 			offset = (word >> 16) & 0xfff;  in tegra_drm_fw_validate()
214 			err = fw_check_regs_imm(&fw, offset);  in tegra_drm_fw_validate()
216 				dev_warn(client->base.dev,  in tegra_drm_fw_validate()
217 					 "illegal IMM(offset=0x%x) in class 0x%x at word %u",  in tegra_drm_fw_validate()
218 					 offset, fw.class, fw.pos-1);  in tegra_drm_fw_validate()
226 				return -EINVAL;  in tegra_drm_fw_validate()
228 			offset = word & 0x3fffff;  in tegra_drm_fw_validate()
229 			err = fw_check_regs_seq(&fw, offset, payload, true);  in tegra_drm_fw_validate()
231 				dev_warn(client->base.dev,  in tegra_drm_fw_validate()
232 					 "illegal INCR_W(offset=0x%x) in class 0x%x at word %u",  in tegra_drm_fw_validate()
233 					 offset, fw.class, fw.pos-1);  in tegra_drm_fw_validate()
237 				return -EINVAL;  in tegra_drm_fw_validate()
239 			offset = word & 0x3fffff;  in tegra_drm_fw_validate()
240 			err = fw_check_regs_seq(&fw, offset, payload, false);  in tegra_drm_fw_validate()
242 				dev_warn(client->base.dev,  in tegra_drm_fw_validate()
243 					 "illegal NONINCR(offset=0x%x) in class 0x%x at word %u",  in tegra_drm_fw_validate()
244 					 offset, fw.class, fw.pos-1);  in tegra_drm_fw_validate()
247 			dev_warn(client->base.dev, "illegal opcode at word %u",  in tegra_drm_fw_validate()
248 				 fw.pos-1);  in tegra_drm_fw_validate()
249 			return -EINVAL;  in tegra_drm_fw_validate()