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freebsd-dev/sys/crypto/ccp/ccp.h
Conrad Meyer 1b0909d51a OpenCrypto: Convert sessions to opaque handles instead of integers 
Track session objects in the framework, and pass handles between the
framework (OCF), consumers, and drivers.  Avoid redundancy and complexity in
individual drivers by allocating session memory in the framework and
providing it to drivers in ::newsession().

Session handles are no longer integers with information encoded in various
high bits.  Use of the CRYPTO_SESID2FOO() macros should be replaced with the
appropriate crypto_ses2foo() function on the opaque session handle.

Convert OCF drivers (in particular, cryptosoft, as well as myriad others) to
the opaque handle interface.  Discard existing session tracking as much as
possible (quick pass).  There may be additional code ripe for deletion.

Convert OCF consumers (ipsec, geom_eli, krb5, cryptodev) to handle-style
interface.  The conversion is largely mechnical.

The change is documented in crypto.9.

Inspired by
https://lists.freebsd.org/pipermail/freebsd-arch/2018-January/018835.html .

No objection from:	ae (ipsec portion)
Reported by:	jhb
2018-07-18 00:56:25 +00:00

260 lines
6.7 KiB
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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2017 Conrad Meyer <cem@FreeBSD.org>
* 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.
*
* $FreeBSD$
*/
#pragma once
/*
* Keccak SHAKE128 (if supported by the device?) uses a 1344 bit block.
* SHA3-224 is the next largest block size, at 1152 bits. However, crypto(4)
* doesn't support any SHA3 hash, so SHA2 is the constraint:
*/
#define CCP_HASH_MAX_BLOCK_SIZE (SHA2_512_BLOCK_LEN)
#define CCP_AES_MAX_KEY_LEN (AES_XTS_MAX_KEY)
#define CCP_MAX_CRYPTO_IV_LEN 32 /* GCM IV + GHASH context */
#define MAX_HW_QUEUES 5
#define MAX_LSB_REGIONS 8
#ifndef __must_check
#define __must_check __attribute__((__warn_unused_result__))
#endif
/*
* Internal data structures.
*/
enum sha_version {
SHA1,
#if 0
SHA2_224,
#endif
SHA2_256, SHA2_384, SHA2_512
};
struct ccp_session_hmac {
struct auth_hash *auth_hash;
int hash_len;
unsigned int partial_digest_len;
unsigned int auth_mode;
unsigned int mk_size;
char ipad[CCP_HASH_MAX_BLOCK_SIZE];
char opad[CCP_HASH_MAX_BLOCK_SIZE];
};
struct ccp_session_gmac {
int hash_len;
char final_block[GMAC_BLOCK_LEN];
};
struct ccp_session_blkcipher {
unsigned cipher_mode;
unsigned cipher_type;
unsigned key_len;
unsigned iv_len;
char enckey[CCP_AES_MAX_KEY_LEN];
char iv[CCP_MAX_CRYPTO_IV_LEN];
};
struct ccp_session {
bool active : 1;
bool cipher_first : 1;
int pending;
enum { HMAC, BLKCIPHER, AUTHENC, GCM } mode;
unsigned queue;
union {
struct ccp_session_hmac hmac;
struct ccp_session_gmac gmac;
};
struct ccp_session_blkcipher blkcipher;
};
struct ccp_softc;
struct ccp_queue {
struct mtx cq_lock;
unsigned cq_qindex;
struct ccp_softc *cq_softc;
/* Host memory and tracking structures for descriptor ring. */
bus_dma_tag_t ring_desc_tag;
bus_dmamap_t ring_desc_map;
struct ccp_desc *desc_ring;
bus_addr_t desc_ring_bus_addr;
/* Callbacks and arguments ring; indices correspond to above ring. */
struct ccp_completion_ctx *completions_ring;
uint32_t qcontrol; /* Cached register value */
unsigned lsb_mask; /* LSBs available to queue */
int private_lsb; /* Reserved LSB #, or -1 */
unsigned cq_head;
unsigned cq_tail;
unsigned cq_acq_tail;
bool cq_waiting; /* Thread waiting for space */
struct sglist *cq_sg_crp;
struct sglist *cq_sg_ulptx;
struct sglist *cq_sg_dst;
};
struct ccp_completion_ctx {
void (*callback_fn)(struct ccp_queue *qp, struct ccp_session *s,
void *arg, int error);
void *callback_arg;
struct ccp_session *session;
};
struct ccp_softc {
device_t dev;
int32_t cid;
struct mtx lock;
bool detaching;
unsigned ring_size_order;
/*
* Each command queue is either public or private. "Private"
* (PSP-only) by default. PSP grants access to some queues to host via
* QMR (Queue Mask Register). Set bits are host accessible.
*/
uint8_t valid_queues;
uint8_t hw_version;
uint8_t num_queues;
uint16_t hw_features;
uint16_t num_lsb_entries;
/* Primary BAR (RID 2) used for register access */
bus_space_tag_t pci_bus_tag;
bus_space_handle_t pci_bus_handle;
int pci_resource_id;
struct resource *pci_resource;
/* Secondary BAR (RID 5) apparently used for MSI-X */
int pci_resource_id_msix;
struct resource *pci_resource_msix;
/* Interrupt resources */
void *intr_tag[2];
struct resource *intr_res[2];
unsigned intr_count;
struct ccp_queue queues[MAX_HW_QUEUES];
};
/* Internal globals */
SYSCTL_DECL(_hw_ccp);
MALLOC_DECLARE(M_CCP);
extern bool g_debug_print;
extern struct ccp_softc *g_ccp_softc;
/*
* Debug macros.
*/
#define DPRINTF(dev, ...) do { \
if (!g_debug_print) \
break; \
if ((dev) != NULL) \
device_printf((dev), "XXX " __VA_ARGS__); \
else \
printf("ccpXXX: " __VA_ARGS__); \
} while (0)
#if 0
#define INSECURE_DEBUG(dev, ...) do { \
if (!g_debug_print) \
break; \
if ((dev) != NULL) \
device_printf((dev), "XXX " __VA_ARGS__); \
else \
printf("ccpXXX: " __VA_ARGS__); \
} while (0)
#else
#define INSECURE_DEBUG(dev, ...)
#endif
/*
* Internal hardware manipulation routines.
*/
int ccp_hw_attach(device_t dev);
void ccp_hw_detach(device_t dev);
void ccp_queue_write_tail(struct ccp_queue *qp);
#ifdef DDB
void db_ccp_show_hw(struct ccp_softc *sc);
void db_ccp_show_queue_hw(struct ccp_queue *qp);
#endif
/*
* Internal hardware crypt-op submission routines.
*/
int ccp_authenc(struct ccp_queue *sc, struct ccp_session *s,
struct cryptop *crp, struct cryptodesc *crda, struct cryptodesc *crde)
__must_check;
int ccp_blkcipher(struct ccp_queue *sc, struct ccp_session *s,
struct cryptop *crp) __must_check;
int ccp_gcm(struct ccp_queue *sc, struct ccp_session *s, struct cryptop *crp,
struct cryptodesc *crda, struct cryptodesc *crde) __must_check;
int ccp_hmac(struct ccp_queue *sc, struct ccp_session *s, struct cryptop *crp)
__must_check;
/*
* Internal hardware TRNG read routine.
*/
u_int random_ccp_read(void *v, u_int c);
/* XXX */
int ccp_queue_acquire_reserve(struct ccp_queue *qp, unsigned n, int mflags)
__must_check;
void ccp_queue_abort(struct ccp_queue *qp);
void ccp_queue_release(struct ccp_queue *qp);
/*
* Internal inline routines.
*/
static inline unsigned
ccp_queue_get_active(struct ccp_queue *qp)
{
struct ccp_softc *sc;
sc = qp->cq_softc;
return ((qp->cq_tail - qp->cq_head) & ((1 << sc->ring_size_order) - 1));
}
static inline unsigned
ccp_queue_get_ring_space(struct ccp_queue *qp)
{
struct ccp_softc *sc;
sc = qp->cq_softc;
return ((1 << sc->ring_size_order) - ccp_queue_get_active(qp) - 1);
}
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