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| 1 | +// SPDX-License-Identifier: GPL-2.0-only |
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| 1 | 2 | /* |
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| 2 | 3 | * Intel I/OAT DMA Linux driver |
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| 3 | 4 | * Copyright(c) 2007 - 2009 Intel Corporation. |
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| 4 | | - * |
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| 5 | | - * This program is free software; you can redistribute it and/or modify it |
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| 6 | | - * under the terms and conditions of the GNU General Public License, |
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| 7 | | - * version 2, as published by the Free Software Foundation. |
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| 8 | | - * |
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| 9 | | - * This program is distributed in the hope that it will be useful, but WITHOUT |
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| 10 | | - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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| 11 | | - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
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| 12 | | - * more details. |
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| 13 | | - * |
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| 14 | | - * The full GNU General Public License is included in this distribution in |
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| 15 | | - * the file called "COPYING". |
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| 16 | | - * |
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| 17 | 5 | */ |
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| 18 | 6 | |
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| 19 | 7 | #include <linux/kernel.h> |
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| .. | .. |
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| 51 | 39 | #define DCA2_TAG_MAP_BYTE2 0x81 |
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| 52 | 40 | #define DCA2_TAG_MAP_BYTE3 0x82 |
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| 53 | 41 | #define DCA2_TAG_MAP_BYTE4 0x82 |
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| 54 | | - |
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| 55 | | -/* verify if tag map matches expected values */ |
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| 56 | | -static inline int dca2_tag_map_valid(u8 *tag_map) |
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| 57 | | -{ |
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| 58 | | - return ((tag_map[0] == DCA2_TAG_MAP_BYTE0) && |
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| 59 | | - (tag_map[1] == DCA2_TAG_MAP_BYTE1) && |
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| 60 | | - (tag_map[2] == DCA2_TAG_MAP_BYTE2) && |
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| 61 | | - (tag_map[3] == DCA2_TAG_MAP_BYTE3) && |
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| 62 | | - (tag_map[4] == DCA2_TAG_MAP_BYTE4)); |
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| 63 | | -} |
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| 64 | 42 | |
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| 65 | 43 | /* |
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| 66 | 44 | * "Legacy" DCA systems do not implement the DCA register set in the |
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| .. | .. |
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| 114 | 92 | int max_requesters; |
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| 115 | 93 | int requester_count; |
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| 116 | 94 | u8 tag_map[IOAT_TAG_MAP_LEN]; |
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| 117 | | - struct ioat_dca_slot req_slots[0]; |
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| 95 | + struct ioat_dca_slot req_slots[]; |
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| 118 | 96 | }; |
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| 119 | 97 | |
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| 120 | 98 | static int ioat_dca_dev_managed(struct dca_provider *dca, |
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| .. | .. |
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| 298 | 276 | return NULL; |
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| 299 | 277 | |
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| 300 | 278 | dca = alloc_dca_provider(&ioat_dca_ops, |
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| 301 | | - sizeof(*ioatdca) |
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| 302 | | - + (sizeof(struct ioat_dca_slot) * slots)); |
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| 279 | + struct_size(ioatdca, req_slots, slots)); |
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| 303 | 280 | if (!dca) |
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| 304 | 281 | return NULL; |
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| 305 | 282 | |
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