Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Dmytro Laktyushkin | 594 | 96.90% | 2 | 66.67% |
Peikang Zhang | 19 | 3.10% | 1 | 33.33% |
Total | 613 | 3 |
/* * Copyright 2019 Advanced Micro Devices, Inc. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * * Authors: AMD * */ #include "mod_vmid.h" struct core_vmid { struct mod_vmid public; struct dc *dc; unsigned int num_vmid; unsigned int num_vmids_available; uint64_t ptb_assigned_to_vmid[MAX_VMID]; struct dc_virtual_addr_space_config base_config; }; #define MOD_VMID_TO_CORE(mod_vmid)\ container_of(mod_vmid, struct core_vmid, public) static void add_ptb_to_table(struct core_vmid *core_vmid, unsigned int vmid, uint64_t ptb) { if (vmid < MAX_VMID) { core_vmid->ptb_assigned_to_vmid[vmid] = ptb; core_vmid->num_vmids_available--; } } static void clear_entry_from_vmid_table(struct core_vmid *core_vmid, unsigned int vmid) { if (vmid < MAX_VMID) { core_vmid->ptb_assigned_to_vmid[vmid] = 0; core_vmid->num_vmids_available++; } } static void evict_vmids(struct core_vmid *core_vmid) { int i; uint16_t ord = dc_get_vmid_use_vector(core_vmid->dc); // At this point any positions with value 0 are unused vmids, evict them for (i = 1; i < core_vmid->num_vmid; i++) { if (!(ord & (1u << i))) clear_entry_from_vmid_table(core_vmid, i); } } // Return value of -1 indicates vmid table unitialized or ptb dne in the table static int get_existing_vmid_for_ptb(struct core_vmid *core_vmid, uint64_t ptb) { int i; for (i = 0; i < core_vmid->num_vmid; i++) { if (core_vmid->ptb_assigned_to_vmid[i] == ptb) return i; } return -1; } // Expected to be called only when there's an available vmid static int get_next_available_vmid(struct core_vmid *core_vmid) { int i; for (i = 1; i < core_vmid->num_vmid; i++) { if (core_vmid->ptb_assigned_to_vmid[i] == 0) return i; } return -1; } uint8_t mod_vmid_get_for_ptb(struct mod_vmid *mod_vmid, uint64_t ptb) { struct core_vmid *core_vmid = MOD_VMID_TO_CORE(mod_vmid); int vmid = 0; // Physical address gets vmid 0 if (ptb == 0) return 0; vmid = get_existing_vmid_for_ptb(core_vmid, ptb); if (vmid == -1) { struct dc_virtual_addr_space_config va_config = core_vmid->base_config; va_config.page_table_base_addr = ptb; if (core_vmid->num_vmids_available == 0) evict_vmids(core_vmid); vmid = get_next_available_vmid(core_vmid); add_ptb_to_table(core_vmid, vmid, ptb); dc_setup_vm_context(core_vmid->dc, &va_config, vmid); } return vmid; } void mod_vmid_reset(struct mod_vmid *mod_vmid) { struct core_vmid *core_vmid = MOD_VMID_TO_CORE(mod_vmid); core_vmid->num_vmids_available = core_vmid->num_vmid - 1; memset(core_vmid->ptb_assigned_to_vmid, 0, sizeof(core_vmid->ptb_assigned_to_vmid[0]) * MAX_VMID); } struct mod_vmid *mod_vmid_create( struct dc *dc, unsigned int num_vmid, struct dc_virtual_addr_space_config *va_config) { struct core_vmid *core_vmid; if (num_vmid <= 1) goto fail_no_vm_ctx; if (dc == NULL) goto fail_dc_null; core_vmid = kzalloc(sizeof(struct core_vmid), GFP_KERNEL); if (core_vmid == NULL) goto fail_alloc_context; core_vmid->dc = dc; core_vmid->num_vmid = num_vmid; core_vmid->num_vmids_available = num_vmid - 1; core_vmid->base_config = *va_config; memset(core_vmid->ptb_assigned_to_vmid, 0, sizeof(core_vmid->ptb_assigned_to_vmid[0]) * MAX_VMID); return &core_vmid->public; fail_no_vm_ctx: fail_alloc_context: fail_dc_null: return NULL; } void mod_vmid_destroy(struct mod_vmid *mod_vmid) { if (mod_vmid != NULL) { struct core_vmid *core_vmid = MOD_VMID_TO_CORE(mod_vmid); kfree(core_vmid); } }
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