1 // SPDX-License-Identifier: MIT
16  * DOC: Write Once Protected Content Memory (WOPCM) Layout
18  * The layout of the WOPCM will be fixed after writing to GuC WOPCM size and
32  *    |    Size   +--------------------+
34  *    |     |     +--------------------+
36  *    |     |     +------------------- +
40  *    |           +------------------- + <== HuC Firmware Top
94 	size = wopcm_size - ctx_rsvd;  in __check_layout()
96 		     guc_wopcm_size > size - guc_wopcm_base)) {  in __check_layout()
97 		drm_err(&xe->drm,  in __check_layout()
98 			"WOPCM: invalid GuC region layout: %uK + %uK > %uK\n",  in __check_layout()
106 		drm_err(&xe->drm, "WOPCM: no space for %s: %uK < %uK\n",  in __check_layout()
114 		drm_err(&xe->drm, "WOPCM: no space for %s: %uK < %uK\n",  in __check_layout()
141 	u32 base = wopcm->guc.base;  in __wopcm_init_regs()
142 	u32 size = wopcm->guc.size;  in __wopcm_init_regs()
143 	u32 huc_agent = xe_uc_fw_is_available(&gt->uc.huc.fw) ? HUC_LOADING_AGENT_GUC : 0;  in __wopcm_init_regs()
169 	drm_notice(&xe->drm, "Failed to init uC WOPCM registers!\n");  in __wopcm_init_regs()
170 	drm_notice(&xe->drm, "%s(%#x)=%#x\n", "DMA_GUC_WOPCM_OFFSET",  in __wopcm_init_regs()
173 	drm_notice(&xe->drm, "%s(%#x)=%#x\n", "GUC_WOPCM_SIZE",  in __wopcm_init_regs()
183 		xe->info.platform == XE_METEORLAKE ? MTL_WOPCM_SIZE :  in xe_wopcm_size()
188  * xe_wopcm_init() - Initialize the WOPCM structure.
201 	u32 guc_fw_size = xe_uc_fw_get_upload_size(&gt->uc.guc.fw);  in xe_wopcm_init()
202 	u32 huc_fw_size = xe_uc_fw_get_upload_size(&gt->uc.huc.fw);  in xe_wopcm_init()
210 		return -EINVAL;  in xe_wopcm_init()
212 	wopcm->size = xe_wopcm_size(xe);  in xe_wopcm_init()
213 	drm_dbg(&xe->drm, "WOPCM: %uK\n", wopcm->size / SZ_1K);  in xe_wopcm_init()
216 	XE_WARN_ON(guc_fw_size >= wopcm->size);  in xe_wopcm_init()
217 	XE_WARN_ON(huc_fw_size >= wopcm->size);  in xe_wopcm_init()
218 	XE_WARN_ON(ctx_rsvd + WOPCM_RESERVED_SIZE >= wopcm->size);  in xe_wopcm_init()
222 		drm_dbg(&xe->drm, "GuC WOPCM is already locked [%uK, %uK)\n",  in xe_wopcm_init()
227 		 * validate if the programmed values align to the wopcm layout.  in xe_wopcm_init()
229 		wopcm->size = MAX_WOPCM_SIZE;  in xe_wopcm_init()
243 	 * correct. Formal check of whole WOPCM layout will be done below.  in xe_wopcm_init()
245 	guc_wopcm_base = min(guc_wopcm_base, wopcm->size - ctx_rsvd);  in xe_wopcm_init()
248 	guc_wopcm_size = wopcm->size - ctx_rsvd - guc_wopcm_base;  in xe_wopcm_init()
251 	drm_dbg(&xe->drm, "Calculated GuC WOPCM [%uK, %uK)\n",  in xe_wopcm_init()
255 	if (__check_layout(xe, wopcm->size, guc_wopcm_base, guc_wopcm_size,  in xe_wopcm_init()
257 		wopcm->guc.base = guc_wopcm_base;  in xe_wopcm_init()
258 		wopcm->guc.size = guc_wopcm_size;  in xe_wopcm_init()
259 		XE_WARN_ON(!wopcm->guc.base);  in xe_wopcm_init()
260 		XE_WARN_ON(!wopcm->guc.size);  in xe_wopcm_init()
262 		drm_notice(&xe->drm, "Unsuccessful WOPCM partitioning\n");  in xe_wopcm_init()
263 		return -E2BIG;  in xe_wopcm_init()