1 /* 2 * Copyright 2019 Advanced Micro Devices, Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 */ 22 23 #include "amdgpu_vm.h" 24 #include "amdgpu_object.h" 25 #include "amdgpu_trace.h" 26 27 /** 28 * amdgpu_vm_cpu_map_table - make sure new PDs/PTs are kmapped 29 * 30 * @table: newly allocated or validated PD/PT 31 */ 32 static int amdgpu_vm_cpu_map_table(struct amdgpu_bo *table) 33 { 34 return amdgpu_bo_kmap(table, NULL); 35 } 36 37 /** 38 * amdgpu_vm_cpu_prepare - prepare page table update with the CPU 39 * 40 * @p: see amdgpu_vm_update_params definition 41 * @resv: reservation object with embedded fence 42 * @sync_mode: synchronization mode 43 * 44 * Returns: 45 * Negativ errno, 0 for success. 46 */ 47 static int amdgpu_vm_cpu_prepare(struct amdgpu_vm_update_params *p, 48 struct dma_resv *resv, 49 enum amdgpu_sync_mode sync_mode) 50 { 51 if (!resv) 52 return 0; 53 54 return amdgpu_bo_sync_wait_resv(p->adev, resv, sync_mode, p->vm, true); 55 } 56 57 /** 58 * amdgpu_vm_cpu_update - helper to update page tables via CPU 59 * 60 * @p: see amdgpu_vm_update_params definition 61 * @bo: PD/PT to update 62 * @pe: byte offset of the PDE/PTE, relative to start of PDB/PTB 63 * @addr: dst addr to write into pe 64 * @count: number of page entries to update 65 * @incr: increase next addr by incr bytes 66 * @flags: hw access flags 67 * 68 * Write count number of PT/PD entries directly. 69 */ 70 static int amdgpu_vm_cpu_update(struct amdgpu_vm_update_params *p, 71 struct amdgpu_bo *bo, uint64_t pe, 72 uint64_t addr, unsigned count, uint32_t incr, 73 uint64_t flags) 74 { 75 unsigned int i; 76 uint64_t value; 77 int r; 78 79 if (bo->tbo.moving) { 80 r = dma_fence_wait(bo->tbo.moving, true); 81 if (r) 82 return r; 83 } 84 85 pe += (unsigned long)amdgpu_bo_kptr(bo); 86 87 trace_amdgpu_vm_set_ptes(pe, addr, count, incr, flags, p->immediate); 88 89 for (i = 0; i < count; i++) { 90 value = p->pages_addr ? 91 amdgpu_vm_map_gart(p->pages_addr, addr) : 92 addr; 93 amdgpu_gmc_set_pte_pde(p->adev, (void *)(uintptr_t)pe, 94 i, value, flags); 95 addr += incr; 96 } 97 return 0; 98 } 99 100 /** 101 * amdgpu_vm_cpu_commit - commit page table update to the HW 102 * 103 * @p: see amdgpu_vm_update_params definition 104 * @fence: unused 105 * 106 * Make sure that the hardware sees the page table updates. 107 */ 108 static int amdgpu_vm_cpu_commit(struct amdgpu_vm_update_params *p, 109 struct dma_fence **fence) 110 { 111 /* Flush HDP */ 112 mb(); 113 amdgpu_asic_flush_hdp(p->adev, NULL); 114 return 0; 115 } 116 117 const struct amdgpu_vm_update_funcs amdgpu_vm_cpu_funcs = { 118 .map_table = amdgpu_vm_cpu_map_table, 119 .prepare = amdgpu_vm_cpu_prepare, 120 .update = amdgpu_vm_cpu_update, 121 .commit = amdgpu_vm_cpu_commit 122 }; 123