1 // SPDX-License-Identifier: MIT 2 /* 3 * Copyright 2023, Intel Corporation. 4 */ 5 6 #include "i915_vma.h" 7 #include "intel_display_types.h" 8 #include "intel_dsb_buffer.h" 9 #include "xe_bo.h" 10 #include "xe_device.h" 11 #include "xe_device_types.h" 12 13 u32 intel_dsb_buffer_ggtt_offset(struct intel_dsb_buffer *dsb_buf) 14 { 15 return xe_bo_ggtt_addr(dsb_buf->vma->bo); 16 } 17 18 void intel_dsb_buffer_write(struct intel_dsb_buffer *dsb_buf, u32 idx, u32 val) 19 { 20 iosys_map_wr(&dsb_buf->vma->bo->vmap, idx * 4, u32, val); 21 } 22 23 u32 intel_dsb_buffer_read(struct intel_dsb_buffer *dsb_buf, u32 idx) 24 { 25 return iosys_map_rd(&dsb_buf->vma->bo->vmap, idx * 4, u32); 26 } 27 28 void intel_dsb_buffer_memset(struct intel_dsb_buffer *dsb_buf, u32 idx, u32 val, size_t size) 29 { 30 WARN_ON(idx > (dsb_buf->buf_size - size) / sizeof(*dsb_buf->cmd_buf)); 31 32 iosys_map_memset(&dsb_buf->vma->bo->vmap, idx * 4, val, size); 33 } 34 35 bool intel_dsb_buffer_create(struct intel_crtc *crtc, struct intel_dsb_buffer *dsb_buf, size_t size) 36 { 37 struct xe_device *xe = to_xe_device(crtc->base.dev); 38 struct xe_bo *obj; 39 struct i915_vma *vma; 40 41 vma = kzalloc(sizeof(*vma), GFP_KERNEL); 42 if (!vma) 43 return false; 44 45 /* Set scanout flag for WC mapping */ 46 obj = xe_bo_create_pin_map(xe, xe_device_get_root_tile(xe), 47 NULL, PAGE_ALIGN(size), 48 ttm_bo_type_kernel, 49 XE_BO_FLAG_VRAM_IF_DGFX(xe_device_get_root_tile(xe)) | 50 XE_BO_FLAG_SCANOUT | XE_BO_FLAG_GGTT); 51 if (IS_ERR(obj)) { 52 kfree(vma); 53 return false; 54 } 55 56 vma->bo = obj; 57 dsb_buf->vma = vma; 58 dsb_buf->buf_size = size; 59 60 return true; 61 } 62 63 void intel_dsb_buffer_cleanup(struct intel_dsb_buffer *dsb_buf) 64 { 65 xe_bo_unpin_map_no_vm(dsb_buf->vma->bo); 66 kfree(dsb_buf->vma); 67 } 68 69 void intel_dsb_buffer_flush_map(struct intel_dsb_buffer *dsb_buf) 70 { 71 struct xe_device *xe = dsb_buf->vma->bo->tile->xe; 72 73 /* 74 * The memory barrier here is to ensure coherency of DSB vs MMIO, 75 * both for weak ordering archs and discrete cards. 76 */ 77 xe_device_wmb(xe); 78 xe_device_l2_flush(xe); 79 } 80