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/*-
* Copyright (C) 2009-2011 Semihalf.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD: release/9.1.0/sys/dev/cesa/cesa.h 227730 2011-11-19 16:30:06Z raj $
*/
#ifndef _DEV_CESA_H_
#define _DEV_CESA_H_
/* Maximum number of allocated sessions */
#define CESA_SESSIONS 64
/* Maximum number of queued requests */
#define CESA_REQUESTS 256
/*
* CESA is able to process data only in CESA SRAM, which is quite small (2 kB).
* We have to fit a packet there, which contains SA descriptor, keys, IV
* and data to be processed. Every request must be converted into chain of
* packets and each packet can hold about 1.75 kB of data.
*
* To process each packet we need at least 1 SA descriptor and at least 4 TDMA
* descriptors. However there are cases when we use 2 SA and 8 TDMA descriptors
* per packet. Number of used TDMA descriptors can increase beyond given values
* if data in the request is fragmented in physical memory.
*
* The driver uses preallocated SA and TDMA descriptors pools to get best
* performace. Size of these pools should match expected request size. Example:
*
* Expected average request size: 1.5 kB (Ethernet MTU)
* Packets per average request: (1.5 kB / 1.75 kB) = 1
* SA decriptors per average request (worst case): 1 * 2 = 2
* TDMA desctiptors per average request (worst case): 1 * 8 = 8
*
* More TDMA descriptors should be allocated, if data fragmentation is expected
* (for example while processing mbufs larger than MCLBYTES). The driver may use
* 2 additional TDMA descriptors per each discontinuity in the physical data
* layout.
*/
/* Values below are optimized for requests containing about 1.5 kB of data */
#define CESA_SA_DESC_PER_REQ 2
#define CESA_TDMA_DESC_PER_REQ 8
#define CESA_SA_DESCRIPTORS (CESA_SA_DESC_PER_REQ * CESA_REQUESTS)
#define CESA_TDMA_DESCRIPTORS (CESA_TDMA_DESC_PER_REQ * CESA_REQUESTS)
/* Useful constants */
#define CESA_HMAC_HASH_LENGTH 12
#define CESA_MAX_FRAGMENTS 64
#define CESA_SRAM_SIZE 2048
/*
* CESA_MAX_HASH_LEN is maximum length of hash generated by CESA.
* As CESA suports only MD5 and SHA1 this equals to 20 bytes.
* However we increase the value to 24 bytes to meet alignment
* requirements in cesa_sa_data structure.
*/
#define CESA_MAX_HASH_LEN 24
#define CESA_MAX_KEY_LEN 32
#define CESA_MAX_IV_LEN 16
#define CESA_MAX_HMAC_BLOCK_LEN 64
#define CESA_MAX_MKEY_LEN CESA_MAX_HMAC_BLOCK_LEN
#define CESA_MAX_PACKET_SIZE (CESA_SRAM_SIZE - CESA_DATA(0))
#define CESA_MAX_REQUEST_SIZE 65535
/* Locking macros */
#define CESA_LOCK(sc, what) mtx_lock(&(sc)->sc_ ## what ## _lock)
#define CESA_UNLOCK(sc, what) mtx_unlock(&(sc)->sc_ ## what ## _lock)
#define CESA_LOCK_ASSERT(sc, what) \
mtx_assert(&(sc)->sc_ ## what ## _lock, MA_OWNED)
/* Registers read/write macros */
#define CESA_READ(sc, reg) \
bus_space_read_4((sc)->sc_bst, (sc)->sc_bsh, (reg))
#define CESA_WRITE(sc, reg, val) \
bus_space_write_4((sc)->sc_bst, (sc)->sc_bsh, (reg), (val))
/* Generic allocator for objects */
#define CESA_GENERIC_ALLOC_LOCKED(sc, obj, pool) do { \
CESA_LOCK(sc, pool); \
\
if (STAILQ_EMPTY(&(sc)->sc_free_ ## pool)) \
obj = NULL; \
else { \
obj = STAILQ_FIRST(&(sc)->sc_free_ ## pool); \
STAILQ_REMOVE_HEAD(&(sc)->sc_free_ ## pool, \
obj ## _stq); \
} \
\
CESA_UNLOCK(sc, pool); \
} while (0)
#define CESA_GENERIC_FREE_LOCKED(sc, obj, pool) do { \
CESA_LOCK(sc, pool); \
STAILQ_INSERT_TAIL(&(sc)->sc_free_ ## pool, obj, \
obj ## _stq); \
CESA_UNLOCK(sc, pool); \
} while (0)
/* CESA SRAM offset calculation macros */
#define CESA_SA_DATA(member) \
(sizeof(struct cesa_sa_hdesc) + offsetof(struct cesa_sa_data, member))
#define CESA_DATA(offset) \
(sizeof(struct cesa_sa_hdesc) + sizeof(struct cesa_sa_data) + offset)
struct cesa_tdma_hdesc {
uint16_t cthd_byte_count;
uint16_t cthd_flags;
uint32_t cthd_src;
uint32_t cthd_dst;
uint32_t cthd_next;
};
struct cesa_sa_hdesc {
uint32_t cshd_config;
uint16_t cshd_enc_src;
uint16_t cshd_enc_dst;
uint32_t cshd_enc_dlen;
uint32_t cshd_enc_key;
uint16_t cshd_enc_iv;
uint16_t cshd_enc_iv_buf;
uint16_t cshd_mac_src;
uint16_t cshd_mac_total_dlen;
uint16_t cshd_mac_dst;
uint16_t cshd_mac_dlen;
uint16_t cshd_mac_iv_in;
uint16_t cshd_mac_iv_out;
};
struct cesa_sa_data {
uint8_t csd_key[CESA_MAX_KEY_LEN];
uint8_t csd_iv[CESA_MAX_IV_LEN];
uint8_t csd_hiv_in[CESA_MAX_HASH_LEN];
uint8_t csd_hiv_out[CESA_MAX_HASH_LEN];
uint8_t csd_hash[CESA_MAX_HASH_LEN];
};
struct cesa_dma_mem {
void *cdm_vaddr;
bus_addr_t cdm_paddr;
bus_dma_tag_t cdm_tag;
bus_dmamap_t cdm_map;
};
struct cesa_tdma_desc {
struct cesa_tdma_hdesc *ctd_cthd;
bus_addr_t ctd_cthd_paddr;
STAILQ_ENTRY(cesa_tdma_desc) ctd_stq;
};
struct cesa_sa_desc {
struct cesa_sa_hdesc *csd_cshd;
bus_addr_t csd_cshd_paddr;
STAILQ_ENTRY(cesa_sa_desc) csd_stq;
};
struct cesa_session {
uint32_t cs_sid;
uint32_t cs_config;
unsigned int cs_klen;
unsigned int cs_ivlen;
unsigned int cs_hlen;
unsigned int cs_mblen;
uint8_t cs_key[CESA_MAX_KEY_LEN];
uint8_t cs_aes_dkey[CESA_MAX_KEY_LEN];
uint8_t cs_hiv_in[CESA_MAX_HASH_LEN];
uint8_t cs_hiv_out[CESA_MAX_HASH_LEN];
STAILQ_ENTRY(cesa_session) cs_stq;
};
struct cesa_request {
struct cesa_sa_data *cr_csd;
bus_addr_t cr_csd_paddr;
struct cryptop *cr_crp;
struct cryptodesc *cr_enc;
struct cryptodesc *cr_mac;
struct cesa_session *cr_cs;
bus_dmamap_t cr_dmap;
int cr_dmap_loaded;
STAILQ_HEAD(, cesa_tdma_desc) cr_tdesc;
STAILQ_HEAD(, cesa_sa_desc) cr_sdesc;
STAILQ_ENTRY(cesa_request) cr_stq;
};
struct cesa_packet {
STAILQ_HEAD(, cesa_tdma_desc) cp_copyin;
STAILQ_HEAD(, cesa_tdma_desc) cp_copyout;
unsigned int cp_size;
unsigned int cp_offset;
};
struct cesa_softc {
device_t sc_dev;
int32_t sc_cid;
struct resource *sc_res[2];
void *sc_icookie;
bus_dma_tag_t sc_data_dtag;
bus_space_tag_t sc_bst;
bus_space_handle_t sc_bsh;
int sc_error;
int sc_tperr;
struct mtx sc_sc_lock;
int sc_blocked;
/* TDMA descriptors pool */
struct mtx sc_tdesc_lock;
struct cesa_tdma_desc sc_tdesc[CESA_TDMA_DESCRIPTORS];
struct cesa_dma_mem sc_tdesc_cdm;
STAILQ_HEAD(, cesa_tdma_desc) sc_free_tdesc;
/* SA descriptors pool */
struct mtx sc_sdesc_lock;
struct cesa_sa_desc sc_sdesc[CESA_SA_DESCRIPTORS];
struct cesa_dma_mem sc_sdesc_cdm;
STAILQ_HEAD(, cesa_sa_desc) sc_free_sdesc;
/* Requests pool */
struct mtx sc_requests_lock;
struct cesa_request sc_requests[CESA_REQUESTS];
struct cesa_dma_mem sc_requests_cdm;
STAILQ_HEAD(, cesa_request) sc_free_requests;
STAILQ_HEAD(, cesa_request) sc_ready_requests;
STAILQ_HEAD(, cesa_request) sc_queued_requests;
/* Sessions pool */
struct mtx sc_sessions_lock;
struct cesa_session sc_sessions[CESA_SESSIONS];
STAILQ_HEAD(, cesa_session) sc_free_sessions;
/* CESA SRAM Address */
bus_addr_t sc_sram_base;
};
struct cesa_chain_info {
struct cesa_softc *cci_sc;
struct cesa_request *cci_cr;
struct cryptodesc *cci_enc;
struct cryptodesc *cci_mac;
uint32_t cci_config;
int cci_error;
};
/* CESA descriptors flags definitions */
#define CESA_CTHD_OWNED (1 << 15)
#define CESA_CSHD_MAC (0 << 0)
#define CESA_CSHD_ENC (1 << 0)
#define CESA_CSHD_MAC_AND_ENC (2 << 0)
#define CESA_CSHD_ENC_AND_MAC (3 << 0)
#define CESA_CSHD_OP_MASK (3 << 0)
#define CESA_CSHD_MD5 (4 << 4)
#define CESA_CSHD_SHA1 (5 << 4)
#define CESA_CSHD_MD5_HMAC ((6 << 4) | (1 << 7))
#define CESA_CSHD_SHA1_HMAC ((7 << 4) | (1 << 7))
#define CESA_CSHD_DES (1 << 8)
#define CESA_CSHD_3DES (2 << 8)
#define CESA_CSHD_AES (3 << 8)
#define CESA_CSHD_DECRYPT (1 << 12)
#define CESA_CSHD_CBC (1 << 16)
#define CESA_CSHD_3DES_EDE (1 << 20)
#define CESA_CSH_AES_KLEN_128 (0 << 24)
#define CESA_CSH_AES_KLEN_192 (1 << 24)
#define CESA_CSH_AES_KLEN_256 (2 << 24)
#define CESA_CSH_AES_KLEN_MASK (3 << 24)
#define CESA_CSHD_FRAG_FIRST (1 << 30)
#define CESA_CSHD_FRAG_LAST (2 << 30)
#define CESA_CSHD_FRAG_MIDDLE (3 << 30)
/* CESA registers definitions */
#define CESA_ICR 0xDE20
#define CESA_ICR_ACCTDMA (1 << 7)
#define CESA_ICR_TPERR (1 << 12)
#define CESA_ICM 0xDE24
#define CESA_ICM_ACCTDMA CESA_ICR_ACCTDMA
#define CESA_ICM_TPERR CESA_ICR_TPERR
/* CESA TDMA registers definitions */
#define CESA_TDMA_ND 0x0830
#define CESA_TDMA_CR 0x0840
#define CESA_TDMA_CR_DBL128 (4 << 0)
#define CESA_TDMA_CR_ORDEN (1 << 4)
#define CESA_TDMA_CR_SBL128 (4 << 6)
#define CESA_TDMA_CR_NBS (1 << 11)
#define CESA_TDMA_CR_ENABLE (1 << 12)
#define CESA_TDMA_CR_FETCHND (1 << 13)
#define CESA_TDMA_CR_ACTIVE (1 << 14)
#define CESA_TDMA_ECR 0x08C8
#define CESA_TDMA_ECR_MISS (1 << 0)
#define CESA_TDMA_ECR_DOUBLE_HIT (1 << 1)
#define CESA_TDMA_ECR_BOTH_HIT (1 << 2)
#define CESA_TDMA_ECR_DATA_ERROR (1 << 3)
#define CESA_TDMA_EMR 0x08CC
#define CESA_TDMA_EMR_MISS CESA_TDMA_ECR_MISS
#define CESA_TDMA_EMR_DOUBLE_HIT CESA_TDMA_ECR_DOUBLE_HIT
#define CESA_TDMA_EMR_BOTH_HIT CESA_TDMA_ECR_BOTH_HIT
#define CESA_TDMA_EMR_DATA_ERROR CESA_TDMA_ECR_DATA_ERROR
/* CESA SA registers definitions */
#define CESA_SA_CMD 0xDE00
#define CESA_SA_CMD_ACTVATE (1 << 0)
#define CESA_SA_DPR 0xDE04
#define CESA_SA_CR 0xDE08
#define CESA_SA_CR_WAIT_FOR_TDMA (1 << 7)
#define CESA_SA_CR_ACTIVATE_TDMA (1 << 9)
#define CESA_SA_CR_MULTI_MODE (1 << 11)
#define CESA_SA_SR 0xDE0C
#define CESA_SA_SR_ACTIVE (1 << 0)
#endif