tjh.dev
Linux kernel mirror (for testing)
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linux
1/*
2 * This file is part of the Chelsio T6 Crypto driver for Linux.
3 *
4 * Copyright (c) 2003-2016 Chelsio Communications, Inc. All rights reserved.
5 *
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 *
34 */
35
36#ifndef __CHCR_CORE_H__
37#define __CHCR_CORE_H__
38
39#include <crypto/algapi.h>
40#include "t4_hw.h"
41#include "cxgb4.h"
42#include "t4_msg.h"
43#include "cxgb4_uld.h"
44
45#define DRV_MODULE_NAME "chcr"
46#define DRV_VERSION "1.0.0.0"
47
48#define MAX_PENDING_REQ_TO_HW 20
49#define CHCR_TEST_RESPONSE_TIMEOUT 1000
50#define WQ_DETACH_TM (msecs_to_jiffies(50))
51#define PAD_ERROR_BIT 1
52#define CHK_PAD_ERR_BIT(x) (((x) >> PAD_ERROR_BIT) & 1)
53
54#define MAC_ERROR_BIT 0
55#define CHK_MAC_ERR_BIT(x) (((x) >> MAC_ERROR_BIT) & 1)
56#define MAX_SALT 4
57#define CIP_WR_MIN_LEN (sizeof(struct chcr_wr) + \
58 sizeof(struct cpl_rx_phys_dsgl) + \
59 sizeof(struct ulptx_sgl) + 16) //IV
60
61#define HASH_WR_MIN_LEN (sizeof(struct chcr_wr) + \
62 DUMMY_BYTES + \
63 sizeof(struct ulptx_sgl))
64struct uld_ctx;
65
66struct _key_ctx {
67 __be32 ctx_hdr;
68 u8 salt[MAX_SALT];
69 __be64 iv_to_auth;
70 unsigned char key[0];
71};
72
73#define KEYCTX_TX_WR_IV_S 55
74#define KEYCTX_TX_WR_IV_M 0x1ffULL
75#define KEYCTX_TX_WR_IV_V(x) ((x) << KEYCTX_TX_WR_IV_S)
76#define KEYCTX_TX_WR_IV_G(x) \
77 (((x) >> KEYCTX_TX_WR_IV_S) & KEYCTX_TX_WR_IV_M)
78
79#define KEYCTX_TX_WR_AAD_S 47
80#define KEYCTX_TX_WR_AAD_M 0xffULL
81#define KEYCTX_TX_WR_AAD_V(x) ((x) << KEYCTX_TX_WR_AAD_S)
82#define KEYCTX_TX_WR_AAD_G(x) (((x) >> KEYCTX_TX_WR_AAD_S) & \
83 KEYCTX_TX_WR_AAD_M)
84
85#define KEYCTX_TX_WR_AADST_S 39
86#define KEYCTX_TX_WR_AADST_M 0xffULL
87#define KEYCTX_TX_WR_AADST_V(x) ((x) << KEYCTX_TX_WR_AADST_S)
88#define KEYCTX_TX_WR_AADST_G(x) \
89 (((x) >> KEYCTX_TX_WR_AADST_S) & KEYCTX_TX_WR_AADST_M)
90
91#define KEYCTX_TX_WR_CIPHER_S 30
92#define KEYCTX_TX_WR_CIPHER_M 0x1ffULL
93#define KEYCTX_TX_WR_CIPHER_V(x) ((x) << KEYCTX_TX_WR_CIPHER_S)
94#define KEYCTX_TX_WR_CIPHER_G(x) \
95 (((x) >> KEYCTX_TX_WR_CIPHER_S) & KEYCTX_TX_WR_CIPHER_M)
96
97#define KEYCTX_TX_WR_CIPHERST_S 23
98#define KEYCTX_TX_WR_CIPHERST_M 0x7f
99#define KEYCTX_TX_WR_CIPHERST_V(x) ((x) << KEYCTX_TX_WR_CIPHERST_S)
100#define KEYCTX_TX_WR_CIPHERST_G(x) \
101 (((x) >> KEYCTX_TX_WR_CIPHERST_S) & KEYCTX_TX_WR_CIPHERST_M)
102
103#define KEYCTX_TX_WR_AUTH_S 14
104#define KEYCTX_TX_WR_AUTH_M 0x1ff
105#define KEYCTX_TX_WR_AUTH_V(x) ((x) << KEYCTX_TX_WR_AUTH_S)
106#define KEYCTX_TX_WR_AUTH_G(x) \
107 (((x) >> KEYCTX_TX_WR_AUTH_S) & KEYCTX_TX_WR_AUTH_M)
108
109#define KEYCTX_TX_WR_AUTHST_S 7
110#define KEYCTX_TX_WR_AUTHST_M 0x7f
111#define KEYCTX_TX_WR_AUTHST_V(x) ((x) << KEYCTX_TX_WR_AUTHST_S)
112#define KEYCTX_TX_WR_AUTHST_G(x) \
113 (((x) >> KEYCTX_TX_WR_AUTHST_S) & KEYCTX_TX_WR_AUTHST_M)
114
115#define KEYCTX_TX_WR_AUTHIN_S 0
116#define KEYCTX_TX_WR_AUTHIN_M 0x7f
117#define KEYCTX_TX_WR_AUTHIN_V(x) ((x) << KEYCTX_TX_WR_AUTHIN_S)
118#define KEYCTX_TX_WR_AUTHIN_G(x) \
119 (((x) >> KEYCTX_TX_WR_AUTHIN_S) & KEYCTX_TX_WR_AUTHIN_M)
120
121#define WQ_RETRY 5
122struct chcr_driver_data {
123 struct list_head act_dev;
124 struct list_head inact_dev;
125 atomic_t dev_count;
126 struct mutex drv_mutex;
127 struct uld_ctx *last_dev;
128};
129
130enum chcr_state {
131 CHCR_INIT = 0,
132 CHCR_ATTACH,
133 CHCR_DETACH,
134};
135struct chcr_wr {
136 struct fw_crypto_lookaside_wr wreq;
137 struct ulp_txpkt ulptx;
138 struct ulptx_idata sc_imm;
139 struct cpl_tx_sec_pdu sec_cpl;
140 struct _key_ctx key_ctx;
141};
142
143struct chcr_dev {
144 spinlock_t lock_chcr_dev;
145 enum chcr_state state;
146 atomic_t inflight;
147 int wqretry;
148 struct delayed_work detach_work;
149 struct completion detach_comp;
150 unsigned char tx_channel_id;
151};
152
153struct uld_ctx {
154 struct list_head entry;
155 struct cxgb4_lld_info lldi;
156 struct chcr_dev dev;
157};
158
159struct sge_opaque_hdr {
160 void *dev;
161 dma_addr_t addr[MAX_SKB_FRAGS + 1];
162};
163
164struct chcr_ipsec_req {
165 struct ulp_txpkt ulptx;
166 struct ulptx_idata sc_imm;
167 struct cpl_tx_sec_pdu sec_cpl;
168 struct _key_ctx key_ctx;
169};
170
171struct chcr_ipsec_wr {
172 struct fw_ulptx_wr wreq;
173 struct chcr_ipsec_req req;
174};
175
176#define ESN_IV_INSERT_OFFSET 12
177struct chcr_ipsec_aadiv {
178 __be32 spi;
179 u8 seq_no[8];
180 u8 iv[8];
181};
182
183struct ipsec_sa_entry {
184 int hmac_ctrl;
185 u16 esn;
186 u16 resv;
187 unsigned int enckey_len;
188 unsigned int kctx_len;
189 unsigned int authsize;
190 __be32 key_ctx_hdr;
191 char salt[MAX_SALT];
192 char key[2 * AES_MAX_KEY_SIZE];
193};
194
195/*
196 * sgl_len - calculates the size of an SGL of the given capacity
197 * @n: the number of SGL entries
198 * Calculates the number of flits needed for a scatter/gather list that
199 * can hold the given number of entries.
200 */
201static inline unsigned int sgl_len(unsigned int n)
202{
203 n--;
204 return (3 * n) / 2 + (n & 1) + 2;
205}
206
207static inline void *padap(struct chcr_dev *dev)
208{
209 struct uld_ctx *u_ctx = container_of(dev, struct uld_ctx, dev);
210
211 return pci_get_drvdata(u_ctx->lldi.pdev);
212}
213
214struct uld_ctx *assign_chcr_device(void);
215int chcr_send_wr(struct sk_buff *skb);
216int start_crypto(void);
217int stop_crypto(void);
218int chcr_uld_rx_handler(void *handle, const __be64 *rsp,
219 const struct pkt_gl *pgl);
220int chcr_uld_tx_handler(struct sk_buff *skb, struct net_device *dev);
221int chcr_handle_resp(struct crypto_async_request *req, unsigned char *input,
222 int err);
223int chcr_ipsec_xmit(struct sk_buff *skb, struct net_device *dev);
224void chcr_add_xfrmops(const struct cxgb4_lld_info *lld);
225#endif /* __CHCR_CORE_H__ */