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f-stack/dpdk/drivers/common/dpaax/caamflib/desc/sdap.h

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DPDK: upgrade to DPDK 20.11.0(LTS).
2021-02-05 08:48:47 +00:00
/* SPDX-License-Identifier: BSD-3-Clause
DPDK: Upgrade to 21.11.2.
2022-09-06 04:00:10 +00:00
* Copyright 2020-2021 NXP
DPDK: upgrade to DPDK 20.11.0(LTS).
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*/
#ifndef __DESC_SDAP_H__
#define __DESC_SDAP_H__
#include "rta.h"
#include "common.h"
#include "pdcp.h"
/* The file defines all the functions to do PDCP without protocol support in
* SEC
*/
/* Enable SDAP support */
#define SDAP_SUPPORT
#ifdef SDAP_SUPPORT
#define SDAP_BYTE_SIZE 1
#define SDAP_BITS_SIZE (SDAP_BYTE_SIZE * 8)
#endif
DPDK: Upgrade to 21.11.2.
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/**
* rta_inline_pdcp_query() - Provide indications if a key can be passed as
* immediate data or shall be referenced in a
* shared descriptor.
* Return: 0 if data can be inlined or 1 if referenced.
*/
static inline int
rta_inline_pdcp_sdap_query(enum auth_type_pdcp auth_alg,
enum cipher_type_pdcp cipher_alg,
enum pdcp_sn_size sn_size,
int8_t hfn_ovd)
{
int nb_key_to_inline = 0;
if ((cipher_alg != PDCP_CIPHER_TYPE_NULL) &&
(auth_alg != PDCP_AUTH_TYPE_NULL))
return 2;
else
return 0;
/**
* Shared Descriptors for some of the cases does not fit in the
* MAX_DESC_SIZE of the descriptor
* The cases which exceed are for RTA_SEC_ERA=8 and HFN override
* enabled and 12/18 bit uplane and either of following Algo combo.
* - AES-SNOW
* - AES-ZUC
* - SNOW-SNOW
* - SNOW-ZUC
* - ZUC-SNOW
* - ZUC-SNOW
*
* We cannot make inline for all cases, as this will impact performance
* due to extra memory accesses for the keys.
*/
/* Inline only the cipher key */
if ((rta_sec_era == RTA_SEC_ERA_8) && hfn_ovd &&
((sn_size == PDCP_SN_SIZE_12) ||
(sn_size == PDCP_SN_SIZE_18)) &&
(cipher_alg != PDCP_CIPHER_TYPE_NULL) &&
((auth_alg == PDCP_AUTH_TYPE_SNOW) ||
(auth_alg == PDCP_AUTH_TYPE_ZUC))) {
nb_key_to_inline++;
/* Sub case where inlining another key is required */
if ((cipher_alg == PDCP_CIPHER_TYPE_AES) &&
(auth_alg == PDCP_AUTH_TYPE_SNOW))
nb_key_to_inline++;
}
/* Inline both keys */
return nb_key_to_inline;
}
DPDK: upgrade to DPDK 20.11.0(LTS).
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static inline void key_loading_opti(struct program *p,
struct alginfo *cipherdata,
struct alginfo *authdata)
{
LABEL(lbl_skip_key_loading_jump);
REFERENCE(ref_skip_key_loading_jump);
/* Optimisation to bypass key loading (and decryption of the keys):
* Jump command testing:
* - SHRD: Descriptor is shared
* - SELF: The shared descriptor is in the same DECO
* - BOTH: The Class 1 and 2 CHA have finished
* -> If this is true, we jump and skip loading of the keys as they are
* already loaded
*/
ref_skip_key_loading_jump =
JUMP(p, lbl_skip_key_loading_jump, LOCAL_JUMP, ALL_TRUE,
SHRD | SELF | BOTH);
/* Load the keys */
if (cipherdata) {
KEY(p, KEY1, cipherdata->key_enc_flags, cipherdata->key,
cipherdata->keylen, INLINE_KEY(cipherdata));
}
if (authdata) {
KEY(p, KEY2, authdata->key_enc_flags, authdata->key,
authdata->keylen, INLINE_KEY(authdata));
}
/* Save the place where we want the jump to go */
SET_LABEL(p, lbl_skip_key_loading_jump);
/* Update the jump command with the position where to jump */
PATCH_JUMP(p, ref_skip_key_loading_jump, lbl_skip_key_loading_jump);
}
static inline int pdcp_sdap_get_sn_parameters(enum pdcp_sn_size sn_size,
bool swap, uint32_t *offset,
uint32_t *length,
uint32_t *sn_mask)
{
switch (sn_size) {
case PDCP_SN_SIZE_5:
*offset = 7;
*length = 1;
*sn_mask = (swap == false) ? PDCP_C_PLANE_SN_MASK :
PDCP_C_PLANE_SN_MASK_BE;
break;
case PDCP_SN_SIZE_7:
*offset = 7;
*length = 1;
*sn_mask = (swap == false) ? PDCP_7BIT_SN_MASK :
PDCP_7BIT_SN_MASK_BE;
break;
case PDCP_SN_SIZE_12:
*offset = 6;
*length = 2;
*sn_mask = (swap == false) ? PDCP_12BIT_SN_MASK :
PDCP_12BIT_SN_MASK_BE;
break;
case PDCP_SN_SIZE_15:
*offset = 6;
*length = 2;
*sn_mask = (swap == false) ? PDCP_U_PLANE_15BIT_SN_MASK :
PDCP_U_PLANE_15BIT_SN_MASK_BE;
break;
case PDCP_SN_SIZE_18:
*offset = 5;
*length = 3;
*sn_mask = (swap == false) ? PDCP_U_PLANE_18BIT_SN_MASK :
PDCP_U_PLANE_18BIT_SN_MASK_BE;
break;
default:
pr_err("Invalid sn_size for %s\n", __func__);
return -ENOTSUP;
}
#ifdef SDAP_SUPPORT
*length += SDAP_BYTE_SIZE;
*offset -= SDAP_BYTE_SIZE;
#endif
return 0;
}
static inline int pdcp_sdap_insert_no_int_op(struct program *p,
bool swap __maybe_unused,
struct alginfo *cipherdata,
unsigned int dir,
DPDK: Upgrade to 21.11.2.
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enum pdcp_sn_size sn_size,
enum pdb_type_e pdb_type)
DPDK: upgrade to DPDK 20.11.0(LTS).
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{
int op;
uint32_t sn_mask = 0;
uint32_t length = 0;
uint32_t offset = 0;
DPDK: Upgrade to 21.11.2.
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int hfn_bearer_dir_offset_in_descbuf =
(pdb_type == PDCP_PDB_TYPE_FULL_PDB) ?
FULL_PDB_DESCBUF_HFN_BEARER_DIR_OFFSET :
REDUCED_PDB_DESCBUF_HFN_BEARER_DIR_OFFSET;
DPDK: upgrade to DPDK 20.11.0(LTS).
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if (pdcp_sdap_get_sn_parameters(sn_size, swap, &offset, &length,
&sn_mask))
return -ENOTSUP;
/* Load key */
key_loading_opti(p, cipherdata, NULL);
SEQLOAD(p, MATH0, offset, length, 0);
JUMP(p, 1, LOCAL_JUMP, ALL_TRUE, CALM);
#ifdef SDAP_SUPPORT
rta_mathi(p, MATH0,
((swap == true) ? MATH_FUN_RSHIFT : MATH_FUN_LSHIFT),
SDAP_BITS_SIZE, MATH1, 8, 0);
MATHB(p, MATH1, AND, sn_mask, MATH1, 8, IFB | IMMED2);
#else
MATHB(p, MATH0, AND, sn_mask, MATH1, 8, IFB | IMMED2);
#endif
SEQSTORE(p, MATH0, offset, length, 0);
MATHB(p, MATH1, SHLD, MATH1, MATH1, 8, 0);
DPDK: Upgrade to 21.11.2.
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MOVEB(p, DESCBUF, hfn_bearer_dir_offset_in_descbuf,
MATH2, 0, 8, WAITCOMP | IMMED);
DPDK: upgrade to DPDK 20.11.0(LTS).
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MATHB(p, MATH1, OR, MATH2, MATH2, 8, 0);
MATHB(p, SEQINSZ, SUB, MATH3, VSEQINSZ, 4, 0);
MATHB(p, SEQINSZ, SUB, MATH3, VSEQOUTSZ, 4, 0);
SEQFIFOSTORE(p, MSG, 0, 0, VLF);
op = dir == OP_TYPE_ENCAP_PROTOCOL ? DIR_ENC : DIR_DEC;
switch (cipherdata->algtype) {
case PDCP_CIPHER_TYPE_SNOW:
/* Copy the IV */
MOVEB(p, MATH2, 0, CONTEXT1, 0, 8, WAITCOMP | IMMED);
ALG_OPERATION(p, OP_ALG_ALGSEL_SNOW_F8, OP_ALG_AAI_F8,
OP_ALG_AS_INITFINAL, ICV_CHECK_DISABLE, op);
break;
case PDCP_CIPHER_TYPE_AES:
/* The first 64 bits are 0 */
MOVEB(p, MATH2, 0, CONTEXT1, 16, 8, WAITCOMP | IMMED);
ALG_OPERATION(p, OP_ALG_ALGSEL_AES, OP_ALG_AAI_CTR,
OP_ALG_AS_INITFINAL, ICV_CHECK_DISABLE, op);
break;
case PDCP_CIPHER_TYPE_ZUC:
if (rta_sec_era < RTA_SEC_ERA_5) {
pr_err("Invalid era for selected algorithm\n");
return -ENOTSUP;
}
/* The LSB and MSB is the same for ZUC context */
MOVEB(p, MATH2, 0, CONTEXT1, 0, 0x08, IMMED);
MOVEB(p, MATH2, 0, CONTEXT1, 0x08, 0x08, WAITCOMP | IMMED);
ALG_OPERATION(p, OP_ALG_ALGSEL_ZUCE, OP_ALG_AAI_F8,
OP_ALG_AS_INITFINAL, ICV_CHECK_DISABLE, op);
break;
default:
pr_err("%s: Invalid encrypt algorithm selected: %d\n",
"pdcp_sdap_insert_15bit_op", cipherdata->algtype);
return -EINVAL;
}
SEQFIFOLOAD(p, MSG1, 0, VLF | LAST1 | FLUSH1);
return 0;
}
static inline int
pdcp_sdap_insert_enc_only_op(struct program *p, bool swap __maybe_unused,
struct alginfo *cipherdata,
struct alginfo *authdata __maybe_unused,
unsigned int dir, enum pdcp_sn_size sn_size,
DPDK: Upgrade to 21.11.2.
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unsigned char era_2_sw_hfn_ovrd __maybe_unused,
enum pdb_type_e pdb_type)
DPDK: upgrade to DPDK 20.11.0(LTS).
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{
uint32_t offset = 0, length = 0, sn_mask = 0;
DPDK: Upgrade to 21.11.2.
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int hfn_bearer_dir_offset_in_descbuf =
(pdb_type == PDCP_PDB_TYPE_FULL_PDB) ?
FULL_PDB_DESCBUF_HFN_BEARER_DIR_OFFSET :
REDUCED_PDB_DESCBUF_HFN_BEARER_DIR_OFFSET;
DPDK: upgrade to DPDK 20.11.0(LTS).
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if (pdcp_sdap_get_sn_parameters(sn_size, swap, &offset, &length,
&sn_mask))
return -ENOTSUP;
/* Load key */
key_loading_opti(p, cipherdata, NULL);
/* Load header */
SEQLOAD(p, MATH0, offset, length, 0);
JUMP(p, 1, LOCAL_JUMP, ALL_TRUE, CALM);
#ifdef SDAP_SUPPORT
rta_mathi(p, MATH0,
((swap == true) ? MATH_FUN_RSHIFT : MATH_FUN_LSHIFT),
SDAP_BITS_SIZE, MATH1, 8, 0);
MATHB(p, MATH1, AND, sn_mask, MATH1, 8, IFB | IMMED2);
#else
MATHB(p, MATH0, AND, sn_mask, MATH1, 8, IFB | IMMED2);
#endif
/* Word (32 bit) swap */
MATHB(p, MATH1, SHLD, MATH1, MATH1, 8, 0);
/* Load words from PDB: word 02 (HFN) + word 03 (bearer_dir)*/
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MOVEB(p, DESCBUF, hfn_bearer_dir_offset_in_descbuf,
MATH2, 0, 8, WAITCOMP | IMMED);
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/* Create basic IV */
MATHB(p, MATH1, OR, MATH2, MATH2, 8, 0);
/* Write header */
SEQSTORE(p, MATH0, offset, length, 0);
if (rta_sec_era > RTA_SEC_ERA_2) {
MATHB(p, SEQINSZ, SUB, ZERO, VSEQINSZ, 4, 0);
} else {
MATHB(p, SEQINSZ, SUB, ONE, MATH1, 4, 0);
MATHB(p, MATH1, ADD, ONE, VSEQINSZ, 4, 0);
}
if (dir == OP_TYPE_ENCAP_PROTOCOL)
MATHB(p, SEQINSZ, ADD, PDCP_MAC_I_LEN, VSEQOUTSZ, 4, IMMED2);
else
MATHB(p, SEQINSZ, SUB, PDCP_MAC_I_LEN, VSEQOUTSZ, 4, IMMED2);
switch (cipherdata->algtype) {
case PDCP_CIPHER_TYPE_SNOW:
MOVEB(p, MATH2, 0, CONTEXT1, 0, 8, WAITCOMP | IMMED);
SEQFIFOSTORE(p, MSG, 0, 0, VLF | CONT);
ALG_OPERATION(p, OP_ALG_ALGSEL_SNOW_F8, OP_ALG_AAI_F8,
OP_ALG_AS_INITFINAL, ICV_CHECK_DISABLE,
dir == OP_TYPE_ENCAP_PROTOCOL ? DIR_ENC :
DIR_DEC);
break;
case PDCP_CIPHER_TYPE_AES:
MOVEB(p, MATH2, 0, CONTEXT1, 16, 8, WAITCOMP | IMMED);
SEQFIFOSTORE(p, MSG, 0, 0, VLF | CONT);
ALG_OPERATION(p, OP_ALG_ALGSEL_AES, OP_ALG_AAI_CTR,
OP_ALG_AS_INITFINAL, ICV_CHECK_DISABLE,
dir == OP_TYPE_ENCAP_PROTOCOL ? DIR_ENC :
DIR_DEC);
break;
case PDCP_CIPHER_TYPE_ZUC:
if (rta_sec_era < RTA_SEC_ERA_5) {
pr_err("Invalid era for selected algorithm\n");
return -ENOTSUP;
}
MOVEB(p, MATH2, 0, CONTEXT1, 0, 0x08, IMMED);
MOVEB(p, MATH2, 0, CONTEXT1, 0x08, 0x08, WAITCOMP | IMMED);
SEQFIFOSTORE(p, MSG, 0, 0, VLF | CONT);
ALG_OPERATION(p, OP_ALG_ALGSEL_ZUCE, OP_ALG_AAI_F8,
OP_ALG_AS_INITFINAL, ICV_CHECK_DISABLE,
dir == OP_TYPE_ENCAP_PROTOCOL ? DIR_ENC :
DIR_DEC);
break;
default:
pr_err("%s: Invalid encrypt algorithm selected: %d\n",
"pdcp_sdap_insert_enc_only_op", cipherdata->algtype);
return -EINVAL;
}
if (dir == OP_TYPE_ENCAP_PROTOCOL) {
SEQFIFOLOAD(p, MSG1, 0, VLF);
FIFOLOAD(p, MSG1, PDCP_NULL_INT_MAC_I_VAL, 4,
LAST1 | FLUSH1 | IMMED);
} else {
SEQFIFOLOAD(p, MSG1, 0, VLF | LAST1 | FLUSH1);
MOVE(p, OFIFO, 0, MATH1, 4, PDCP_MAC_I_LEN, WAITCOMP | IMMED);
MATHB(p, MATH1, XOR, PDCP_NULL_INT_MAC_I_VAL, NONE, 4, IMMED2);
JUMP(p, PDCP_NULL_INT_ICV_CHECK_FAILED_STATUS, HALT_STATUS,
ALL_FALSE, MATH_Z);
}
return 0;
}
/*
* This function leverage the use of in/out snooping as SNOW and ZUC both
* have a class 1 and class 2 CHA. It also supports AES as cipher.
* Supported:
* - cipher:
* - AES-CTR
* - SNOW F8
* - ZUC F8
* - authentication
* - SNOW F8
* - ZUC F8
*/
static inline int
pdcp_sdap_insert_snoop_op(struct program *p, bool swap __maybe_unused,
struct alginfo *cipherdata, struct alginfo *authdata,
unsigned int dir, enum pdcp_sn_size sn_size,
DPDK: Upgrade to 21.11.2.
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unsigned char era_2_sw_hfn_ovrd __maybe_unused,
enum pdb_type_e pdb_type)
DPDK: upgrade to DPDK 20.11.0(LTS).
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{
uint32_t offset = 0, length = 0, sn_mask = 0;
uint32_t int_op_alg = 0;
uint32_t int_op_aai = 0;
uint32_t cipher_op_alg = 0;
uint32_t cipher_op_aai = 0;
DPDK: Upgrade to 21.11.2.
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int hfn_bearer_dir_offset_in_descbuf =
(pdb_type == PDCP_PDB_TYPE_FULL_PDB) ?
FULL_PDB_DESCBUF_HFN_BEARER_DIR_OFFSET :
REDUCED_PDB_DESCBUF_HFN_BEARER_DIR_OFFSET;
DPDK: upgrade to DPDK 20.11.0(LTS).
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if (authdata->algtype == PDCP_CIPHER_TYPE_ZUC) {
if (rta_sec_era < RTA_SEC_ERA_5) {
pr_err("Invalid era for selected algorithm\n");
return -ENOTSUP;
}
}
if (pdcp_sdap_get_sn_parameters(sn_size, swap, &offset, &length,
&sn_mask))
return -ENOTSUP;
if (dir == OP_TYPE_ENCAP_PROTOCOL)
MATHB(p, SEQINSZ, SUB, length, VSEQINSZ, 4, IMMED2);
key_loading_opti(p, cipherdata, authdata);
/* Load the PDCP header from the input data
* Note: SEQINSZ is decremented by length
*/
SEQLOAD(p, MATH0, offset, length, 0);
/* Wait the SN is loaded */
JUMP(p, 1, LOCAL_JUMP, ALL_TRUE, CALM);
/* Pass the PDCP header to integrity block */
MOVEB(p, MATH0, offset, IFIFOAB2, 0, length, IMMED);
#ifdef SDAP_SUPPORT
/* If SDAP is enabled, the least significant byte is the SDAP header
* Remove it by shifting the register
*/
rta_mathi(p, MATH0,
((swap == true) ? MATH_FUN_RSHIFT : MATH_FUN_LSHIFT),
SDAP_BITS_SIZE, MATH1, 8, 0);
/* Mask the PDCP header to keep only the SN */
MATHB(p, MATH1, AND, sn_mask, MATH1, 8, IFB | IMMED2);
#else
/* Mask the PDCP header to keep only the SN */
MATHB(p, MATH0, AND, sn_mask, MATH1, 8, IFB | IMMED2);
#endif
/* Do a byte swap, it places the SN in upper part of the MATH reg */
MATHB(p, MATH1, SHLD, MATH1, MATH1, 8, 0);
/* Load the HFN / Beare / Dir from the PDB
* CAAM word are 32bit hence loading 8 byte loads 2 words:
DPDK: Upgrade to 21.11.2.
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* - The HFN at offset hfn_bearer_dir_offset_in_descbuf
* - The Bearer / Dir at next word
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*/
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MOVEB(p, DESCBUF, hfn_bearer_dir_offset_in_descbuf,
MATH2, 0, 8, WAITCOMP | IMMED);
/* Create the 4 first byte of the ICV by or-ing the math registers */
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MATHB(p, MATH1, OR, MATH2, MATH1, 8, 0);
/* Set the IV of class 1 CHA */
if (cipherdata->algtype == PDCP_CIPHER_TYPE_AES) {
MOVEB(p, MATH1, 0, CONTEXT1, 16, 8, IMMED);
} else {
/* Set the IV for the confidentiality CHA */
MOVEB(p, MATH1, 0, CONTEXT1, 0, 8, IMMED);
}
/* Set the IV of class 2 CHA */
if (authdata->algtype == PDCP_AUTH_TYPE_ZUC) {
/* Set the IV for the integrity CHA */
MOVEB(p, MATH1, 0, CONTEXT2, 0, 8, WAITCOMP | IMMED);
} else if (authdata->algtype == PDCP_AUTH_TYPE_SNOW) {
MOVEB(p, MATH1, 0, CONTEXT2, 0, 4, WAITCOMP | IMMED);
/* Generate the bottom snow IV for integrity
* Note: MATH1 lowest 32bits is as follow:
* | bearer (5) | Dir (1) | zero (26) |
* the resulting math regs will be:
* MATH3 MATH2
* | zero (5) | Dir (1) | zero (26) | | Bearer (5) | zero (27) |
*/
if (swap == false) {
MATHB(p, MATH1, AND, upper_32_bits(PDCP_BEARER_MASK),
MATH2, 4, IMMED2);
MATHB(p, MATH1, AND, lower_32_bits(PDCP_DIR_MASK),
MATH3, 4, IMMED2);
} else {
MATHB(p, MATH1, AND, lower_32_bits(PDCP_BEARER_MASK_BE),
MATH2, 4, IMMED2);
MATHB(p, MATH1, AND, upper_32_bits(PDCP_DIR_MASK_BE),
MATH3, 4, IMMED2);
}
/* Word swap MATH3 reg */
MATHB(p, MATH3, SHLD, MATH3, MATH3, 8, 0);
/* Don't understand, seems to be doing a move of 12 byte
* (read MATH2 and overread MATH3)
*/
MOVEB(p, MATH2, 4, OFIFO, 0, 12, IMMED);
/* Add the rest of the snow IV to the context */
MOVE(p, OFIFO, 0, CONTEXT2, 4, 12, IMMED);
}
/* Set the variable size of data the register will write */
if (dir == OP_TYPE_ENCAP_PROTOCOL) {
DPDK: upgrade to dpdk-20.11.6.
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/* We will add the integrity data so add its length */
DPDK: upgrade to DPDK 20.11.0(LTS).
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MATHI(p, SEQINSZ, ADD, PDCP_MAC_I_LEN, VSEQOUTSZ, 4, IMMED2);
} else {
DPDK: upgrade to dpdk-20.11.6.
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/* We will check the integrity data so remove its length */
DPDK: upgrade to DPDK 20.11.0(LTS).
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MATHI(p, SEQINSZ, SUB, PDCP_MAC_I_LEN, VSEQOUTSZ, 4, IMMED2);
/* Do not take the ICV in the out-snooping configuration */
MATHI(p, SEQINSZ, SUB, PDCP_MAC_I_LEN, VSEQINSZ, 4, IMMED2);
}
/* We write the PDCP header to output*/
SEQSTORE(p, MATH0, offset, length, 0);
/* Definition of the flow of output data */
if (dir == OP_TYPE_ENCAP_PROTOCOL) {
/* We write data according to VSEQOUTSZ */
SEQFIFOSTORE(p, MSG, 0, 0, VLF);
} else {
/* We write data according to VSEQOUTSZ */
SEQFIFOSTORE(p, MSG, 0, 0, VLF | CONT);
}
/* Get parameters for authentication */
if (authdata->algtype == PDCP_AUTH_TYPE_ZUC) {
int_op_alg = OP_ALG_ALGSEL_ZUCA;
int_op_aai = OP_ALG_AAI_F9;
} else if (authdata->algtype == PDCP_AUTH_TYPE_SNOW) {
int_op_alg = OP_ALG_ALGSEL_SNOW_F9;
int_op_aai = OP_ALG_AAI_F9;
} else {
pr_err("%s no support for auth alg: %d\n", __func__,
authdata->algtype);
return -1;
}
/* Get parameters for ciphering */
if (cipherdata->algtype == PDCP_CIPHER_TYPE_ZUC) {
cipher_op_alg = OP_ALG_ALGSEL_ZUCE;
cipher_op_aai = OP_ALG_AAI_F8;
} else if (cipherdata->algtype == PDCP_CIPHER_TYPE_SNOW) {
cipher_op_alg = OP_ALG_ALGSEL_SNOW_F8;
cipher_op_aai = OP_ALG_AAI_F8;
} else if (cipherdata->algtype == PDCP_CIPHER_TYPE_AES) {
cipher_op_alg = OP_ALG_ALGSEL_AES;
cipher_op_aai = OP_ALG_AAI_CTR;
} else {
pr_err("%s no support for cipher alg: %d\n", __func__,
authdata->algtype);
return -1;
}
/* Configure the CHA, the class 2 CHA must be configured first or an
* error will be generated
*/
/* Configure the class 2 CHA (integrity )*/
ALG_OPERATION(p, int_op_alg, int_op_aai, OP_ALG_AS_INITFINAL,
dir == OP_TYPE_ENCAP_PROTOCOL ? ICV_CHECK_DISABLE :
ICV_CHECK_ENABLE,
DIR_ENC);
/* Configure class 1 CHA (confidentiality)*/
ALG_OPERATION(p, cipher_op_alg, cipher_op_aai, OP_ALG_AS_INITFINAL,
ICV_CHECK_DISABLE,
dir == OP_TYPE_ENCAP_PROTOCOL ? DIR_ENC : DIR_DEC);
/* Definition of the flow of input data */
if (dir == OP_TYPE_ENCAP_PROTOCOL) {
/* We read data according to VSEQINSZ
* Note: we perform an in-snooping, eg the data will be read
* only once. they will be sent to both the integrity CHA and
* confidentiality CHA
*/
SEQFIFOLOAD(p, MSGINSNOOP, 0, VLF | LAST2);
/* When the integrity CHA is finished, send the ICV stored in
* the context to the confidentiality CHA for encryption
*/
MOVE(p, CONTEXT2, 0, IFIFOAB1, 0, 4, LAST1 | FLUSH1 | IMMED);
} else {
/* We read data according to VSEQINSZ
* Note: we perform an out-snooping, eg the data will be read
* only once. The will first be sent to the confidentiality
* CHA for decryption, then the CAAM will direct them to the
* integrity CHA to verify the ICV (which is at the end of the
* sequence)
*/
SEQFIFOLOAD(p, MSGOUTSNOOP, 0, VLF | LAST2);
/* Process the ICV by class 1 CHA */
SEQFIFOLOAD(p, MSG1, 4, LAST1 | FLUSH1);
/* Wait for class 1 CHA to finish, the ICV data are stalling in
* the output fifo
*/
JUMP(p, 1, LOCAL_JUMP, ALL_TRUE, CLASS1 | NOP | NIFP);
if (rta_sec_era >= RTA_SEC_ERA_6)
LOAD(p, 0, DCTRL, 0, LDLEN_RST_CHA_OFIFO_PTR, IMMED);
/* Save the content left in the Output FIFO (the ICV) to MATH0
*/
MOVE(p, OFIFO, 0, MATH0, 0, 4, WAITCOMP | IMMED);
/* Configure a NFIFO entry to take data from the altsource
* and send it to the class 2 CHA as an ICV
*/
NFIFOADD(p, IFIFO, ICV2, 4, LAST2);
/* Move the content of MATH0 (OFIFO offset) to altsource
* Note: As configured by the altsource, this will send
* the
*/
if (rta_sec_era <= RTA_SEC_ERA_2) {
/* Shut off automatic Info FIFO entries */
LOAD(p, 0, DCTRL, LDOFF_DISABLE_AUTO_NFIFO, 0, IMMED);
MOVE(p, MATH0, 0, IFIFOAB2, 0, 4, WAITCOMP | IMMED);
} else {
MOVE(p, MATH0, 0, IFIFO, 0, 4, WAITCOMP | IMMED);
}
}
if (authdata->algtype == PDCP_CIPHER_TYPE_ZUC) {
/* Reset ZUCA mode and done interrupt
* Note: If it is not done, DECO generate an error: 200031ca
* -> ZUCA ICV failed
*/
LOAD(p, CLRW_CLR_C2MODE, CLRW, 0, 4, IMMED);
LOAD(p, CIRQ_ZADI, ICTRL, 0, 4, IMMED);
}
return 0;
}
/* Function used when the integrity algorithm is a class 1 CHA so outsnooping
* is not possible
* Supported:
* - cipher:
* - AES-CTR
* - SNOW F8
* - ZUC F8
* - authentication
* - AES-CMAC
*/
static inline int pdcp_sdap_insert_no_snoop_op(
struct program *p, bool swap __maybe_unused, struct alginfo *cipherdata,
struct alginfo *authdata, unsigned int dir, enum pdcp_sn_size sn_size,
DPDK: Upgrade to 21.11.2.
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unsigned char era_2_sw_hfn_ovrd __maybe_unused,
enum pdb_type_e pdb_type)
DPDK: upgrade to DPDK 20.11.0(LTS).
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{
uint32_t offset = 0, length = 0, sn_mask = 0;
uint32_t cipher_alg_op = 0;
uint32_t cipher_alg_aai = 0;
DPDK: Upgrade to 21.11.2.
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int hfn_bearer_dir_offset_in_descbuf =
(pdb_type == PDCP_PDB_TYPE_FULL_PDB) ?
FULL_PDB_DESCBUF_HFN_BEARER_DIR_OFFSET :
REDUCED_PDB_DESCBUF_HFN_BEARER_DIR_OFFSET;
DPDK: upgrade to DPDK 20.11.0(LTS).
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if (authdata->algtype == PDCP_CIPHER_TYPE_ZUC) {
if (rta_sec_era < RTA_SEC_ERA_5) {
pr_err("Invalid era for selected algorithm\n");
return -ENOTSUP;
}
}
if (pdcp_sdap_get_sn_parameters(sn_size, swap, &offset, &length,
&sn_mask))
return -ENOTSUP;
SEQLOAD(p, MATH0, offset, length, 0);
JUMP(p, 1, LOCAL_JUMP, ALL_TRUE, CALM);
#ifdef SDAP_SUPPORT
rta_mathi(p, MATH0,
((swap == true) ? MATH_FUN_RSHIFT : MATH_FUN_LSHIFT),
SDAP_BITS_SIZE, MATH1, 8, 0);
MATHB(p, MATH1, AND, sn_mask, MATH1, 8, IFB | IMMED2);
#else
MATHB(p, MATH0, AND, sn_mask, MATH1, 8, IFB | IMMED2);
#endif
MATHB(p, MATH1, SHLD, MATH1, MATH1, 8, 0);
DPDK: Upgrade to 21.11.2.
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MOVEB(p, DESCBUF, hfn_bearer_dir_offset_in_descbuf,
MATH2, 0, 0x08, WAITCOMP | IMMED);
DPDK: upgrade to DPDK 20.11.0(LTS).
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MATHB(p, MATH1, OR, MATH2, MATH2, 8, 0);
SEQSTORE(p, MATH0, offset, length, 0);
if (dir == OP_TYPE_ENCAP_PROTOCOL) {
/* Load authentication key */
KEY(p, KEY1, authdata->key_enc_flags, authdata->key,
authdata->keylen, INLINE_KEY(authdata));
/* Set the iv for AES authentication */
MOVEB(p, MATH2, 0, IFIFOAB1, 0, 8, IMMED);
/* Pass the header */
MOVEB(p, MATH0, offset, IFIFOAB1, 0, length, IMMED);
/* Configure variable size for I/O */
MATHB(p, SEQINSZ, SUB, ZERO, VSEQINSZ, 4, 0);
MATHB(p, VSEQINSZ, ADD, PDCP_MAC_I_LEN, VSEQOUTSZ, 4, IMMED2);
/* Perform the authentication */
ALG_OPERATION(p, OP_ALG_ALGSEL_AES, OP_ALG_AAI_CMAC,
OP_ALG_AS_INITFINAL, ICV_CHECK_DISABLE, DIR_DEC);
/* Configure the read of data */
SEQFIFOLOAD(p, MSG1, 0, VLF | LAST1 | FLUSH1);
/* Save the ICV generated */
MOVEB(p, CONTEXT1, 0, MATH3, 0, 4, WAITCOMP | IMMED);
/* The CHA will be reused so we need to clear it */
LOAD(p, CLRW_RESET_CLS1_CHA |
CLRW_CLR_C1KEY |
CLRW_CLR_C1CTX |
CLRW_CLR_C1ICV |
CLRW_CLR_C1DATAS |
CLRW_CLR_C1MODE,
CLRW, 0, 4, IMMED);
/* Load confidentiality key */
KEY(p, KEY1, cipherdata->key_enc_flags, cipherdata->key,
cipherdata->keylen, INLINE_KEY(cipherdata));
/* Load the IV for ciphering */
if (cipherdata->algtype == PDCP_CIPHER_TYPE_AES) {
MOVEB(p, MATH2, 0, CONTEXT1, 16, 8, IMMED);
cipher_alg_op = OP_ALG_ALGSEL_AES;
cipher_alg_aai = OP_ALG_AAI_CTR;
} else if (cipherdata->algtype == PDCP_CIPHER_TYPE_ZUC) {
/* Set the IV for the confidentiality CHA */
MOVEB(p, MATH2, 0, CONTEXT1, 0, 8, IMMED);
cipher_alg_op = OP_ALG_ALGSEL_ZUCE;
cipher_alg_aai = OP_ALG_AAI_F8;
} else if (cipherdata->algtype == PDCP_CIPHER_TYPE_SNOW) {
/* Set the IV for the confidentiality CHA */
MOVEB(p, MATH2, 0, CONTEXT1, 0, 8, IMMED);
cipher_alg_op = OP_ALG_ALGSEL_SNOW_F8;
cipher_alg_aai = OP_ALG_AAI_F8;
}
/* Rewind the pointer on input data to reread it */
SEQINPTR(p, 0, PDCP_NULL_MAX_FRAME_LEN, RTO);
/* Define the ciphering operation */
ALG_OPERATION(p, cipher_alg_op, cipher_alg_aai,
OP_ALG_AS_INITFINAL, ICV_CHECK_DISABLE, DIR_ENC);
/* Define the data to write */
SEQFIFOSTORE(p, MSG, 0, 0, VLF);
/* Skip the header which does not need to be encrypted */
SEQFIFOLOAD(p, SKIP, length, 0);
/* Read the rest of the data */
SEQFIFOLOAD(p, MSG1, 0, VLF);
/* Send the ICV stored in MATH3 for encryption */
MOVEB(p, MATH3, 0, IFIFOAB1, 0, 4, LAST1 | FLUSH1 | IMMED);
} else {
/* Load the IV for ciphering */
if (cipherdata->algtype == PDCP_CIPHER_TYPE_AES) {
MOVEB(p, MATH2, 0, CONTEXT1, 16, 8, IMMED);
cipher_alg_op = OP_ALG_ALGSEL_AES;
cipher_alg_aai = OP_ALG_AAI_CTR;
} else if (cipherdata->algtype == PDCP_CIPHER_TYPE_ZUC) {
/* Set the IV for the confidentiality CHA */
MOVEB(p, MATH2, 0, CONTEXT1, 0, 8, IMMED);
cipher_alg_op = OP_ALG_ALGSEL_ZUCE;
cipher_alg_aai = OP_ALG_AAI_F8;
} else if (cipherdata->algtype == PDCP_CIPHER_TYPE_SNOW) {
/* Set the IV for the confidentiality CHA */
MOVEB(p, MATH2, 0, CONTEXT1, 0, 8, IMMED);
cipher_alg_op = OP_ALG_ALGSEL_SNOW_F8;
cipher_alg_aai = OP_ALG_AAI_F8;
}
MOVEB(p, MATH2, 0, CONTEXT2, 0, 8, IMMED);
/* Read all the data */
MATHB(p, SEQINSZ, SUB, ZERO, VSEQINSZ, 4, 0);
/* Do not write back the ICV */
MATHB(p, SEQINSZ, SUB, PDCP_MAC_I_LEN, VSEQOUTSZ, 4, IMMED2);
/* Load the key for ciphering */
KEY(p, KEY1, cipherdata->key_enc_flags, cipherdata->key,
cipherdata->keylen, INLINE_KEY(cipherdata));
/* Write all the data */
SEQFIFOSTORE(p, MSG, 0, 0, VLF | CONT);
/* Define the ciphering algorithm */
ALG_OPERATION(p, cipher_alg_op, cipher_alg_aai,
OP_ALG_AS_INITFINAL, ICV_CHECK_DISABLE, DIR_DEC);
/* Read all the data */
SEQFIFOLOAD(p, MSG1, 0, VLF | LAST1 | FLUSH1);
/* Save the ICV which is stalling in output FIFO to MATH3 */
MOVEB(p, OFIFO, 0, MATH3, 0, 4, IMMED);
/* Reset class 1 CHA */
LOAD(p, CLRW_RESET_CLS1_CHA |
CLRW_CLR_C1KEY |
CLRW_CLR_C1CTX |
CLRW_CLR_C1ICV |
CLRW_CLR_C1DATAS |
CLRW_CLR_C1MODE,
CLRW, 0, 4, IMMED);
DPDK: upgrade to dpdk-20.11.6.
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/* Load the key for authentication */
DPDK: upgrade to DPDK 20.11.0(LTS).
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KEY(p, KEY1, authdata->key_enc_flags, authdata->key,
authdata->keylen, INLINE_KEY(authdata));
/* Start a new sequence */
SEQINPTR(p, 0, 0, SOP);
/* Define the operation to verify the ICV */
ALG_OPERATION(p, OP_ALG_ALGSEL_AES, OP_ALG_AAI_CMAC,
OP_ALG_AS_INITFINAL, ICV_CHECK_ENABLE, DIR_DEC);
/* Set the variable size input */
MATHB(p, SEQINSZ, SUB, ZERO, VSEQINSZ, 4, 0);
MOVE(p, CONTEXT2, 0, IFIFOAB1, 0, 8, IMMED);
SEQFIFOLOAD(p, MSG1, 0, VLF | LAST1 | FLUSH1);
/* Define an NFIFO entry to load the ICV saved */
LOAD(p, NFIFOENTRY_STYPE_ALTSOURCE |
NFIFOENTRY_DEST_CLASS1 |
NFIFOENTRY_DTYPE_ICV |
NFIFOENTRY_LC1 |
NFIFOENTRY_FC1 | 4, NFIFO_SZL, 0, 4, IMMED);
/* Load the ICV */
MOVEB(p, MATH3, 0, ALTSOURCE, 0, 4, IMMED);
}
return 0;
}
DPDK: Upgrade to 21.11.2.
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static inline int
pdcp_sdap_insert_cplane_null_op(struct program *p,
bool swap __maybe_unused,
struct alginfo *cipherdata,
struct alginfo *authdata,
unsigned int dir,
enum pdcp_sn_size sn_size,
unsigned char era_2_sw_hfn_ovrd,
enum pdb_type_e pdb_type __maybe_unused)
{
return pdcp_insert_cplane_null_op(p, swap, cipherdata, authdata, dir,
sn_size, era_2_sw_hfn_ovrd);
}
static inline int
pdcp_sdap_insert_cplane_int_only_op(struct program *p,
bool swap __maybe_unused,
struct alginfo *cipherdata,
struct alginfo *authdata,
unsigned int dir,
enum pdcp_sn_size sn_size,
unsigned char era_2_sw_hfn_ovrd,
enum pdb_type_e pdb_type __maybe_unused)
{
return pdcp_insert_cplane_int_only_op(p, swap, cipherdata, authdata,
dir, sn_size, era_2_sw_hfn_ovrd);
}
DPDK: upgrade to DPDK 20.11.0(LTS).
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static int pdcp_sdap_insert_with_int_op(
struct program *p, bool swap __maybe_unused, struct alginfo *cipherdata,
struct alginfo *authdata, enum pdcp_sn_size sn_size,
DPDK: Upgrade to 21.11.2.
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unsigned char era_2_sw_hfn_ovrd, unsigned int dir,
enum pdb_type_e pdb_type)
DPDK: upgrade to DPDK 20.11.0(LTS).
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{
static int (
*pdcp_cp_fp[PDCP_CIPHER_TYPE_INVALID][PDCP_AUTH_TYPE_INVALID])(
struct program *, bool swap, struct alginfo *, struct alginfo *,
unsigned int, enum pdcp_sn_size,
DPDK: Upgrade to 21.11.2.
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unsigned char __maybe_unused, enum pdb_type_e pdb_type) = {
DPDK: upgrade to DPDK 20.11.0(LTS).
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{
/* NULL */
DPDK: Upgrade to 21.11.2.
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pdcp_sdap_insert_cplane_null_op, /* NULL */
pdcp_sdap_insert_cplane_int_only_op, /* SNOW f9 */
pdcp_sdap_insert_cplane_int_only_op, /* AES CMAC */
pdcp_sdap_insert_cplane_int_only_op /* ZUC-I */
DPDK: upgrade to DPDK 20.11.0(LTS).
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},
{
/* SNOW f8 */
pdcp_sdap_insert_enc_only_op, /* NULL */
pdcp_sdap_insert_snoop_op, /* SNOW f9 */
pdcp_sdap_insert_no_snoop_op, /* AES CMAC */
pdcp_sdap_insert_snoop_op /* ZUC-I */
},
{
/* AES CTR */
pdcp_sdap_insert_enc_only_op, /* NULL */
pdcp_sdap_insert_snoop_op, /* SNOW f9 */
pdcp_sdap_insert_no_snoop_op, /* AES CMAC */
pdcp_sdap_insert_snoop_op /* ZUC-I */
},
{
/* ZUC-E */
pdcp_sdap_insert_enc_only_op, /* NULL */
pdcp_sdap_insert_snoop_op, /* SNOW f9 */
pdcp_sdap_insert_no_snoop_op, /* AES CMAC */
pdcp_sdap_insert_snoop_op /* ZUC-I */
},
};
int err;
err = pdcp_cp_fp[cipherdata->algtype]
[authdata->algtype](p, swap, cipherdata, authdata, dir,
DPDK: Upgrade to 21.11.2.
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sn_size, era_2_sw_hfn_ovrd, pdb_type);
DPDK: upgrade to DPDK 20.11.0(LTS).
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if (err)
return err;
return 0;
}
static inline int
cnstr_shdsc_pdcp_sdap_u_plane(uint32_t *descbuf,
bool ps,
bool swap,
enum pdcp_sn_size sn_size,
uint32_t hfn,
unsigned short bearer,
unsigned short direction,
uint32_t hfn_threshold,
struct alginfo *cipherdata,
struct alginfo *authdata,
unsigned char era_2_sw_hfn_ovrd,
uint32_t caps_mode)
{
struct program prg;
struct program *p = &prg;
int err;
enum pdb_type_e pdb_type;
static enum rta_share_type
desc_share[PDCP_CIPHER_TYPE_INVALID][PDCP_AUTH_TYPE_INVALID] = {
{
/* NULL */
SHR_WAIT, /* NULL */
SHR_ALWAYS, /* SNOW f9 */
SHR_ALWAYS, /* AES CMAC */
SHR_ALWAYS /* ZUC-I */
},
{
/* SNOW f8 */
SHR_ALWAYS, /* NULL */
SHR_ALWAYS, /* SNOW f9 */
SHR_WAIT, /* AES CMAC */
SHR_WAIT /* ZUC-I */
},
{
/* AES CTR */
SHR_ALWAYS, /* NULL */
SHR_ALWAYS, /* SNOW f9 */
SHR_ALWAYS, /* AES CMAC */
SHR_WAIT /* ZUC-I */
},
{
/* ZUC-E */
SHR_ALWAYS, /* NULL */
SHR_WAIT, /* SNOW f9 */
SHR_WAIT, /* AES CMAC */
SHR_WAIT /* ZUC-I */
},
};
LABEL(pdb_end);
/* Check HFN override for ERA 2 */
if (rta_sec_era != RTA_SEC_ERA_2 && era_2_sw_hfn_ovrd) {
pr_err("Cannot select SW HFN ovrd for other era than 2");
return -EINVAL;
}
/* Check the confidentiality algorithm is supported by the code */
switch (cipherdata->algtype) {
case PDCP_CIPHER_TYPE_NULL:
case PDCP_CIPHER_TYPE_SNOW:
case PDCP_CIPHER_TYPE_AES:
case PDCP_CIPHER_TYPE_ZUC:
break;
default:
pr_err("Cipher algorithm not supported: %d\n",
cipherdata->algtype);
return -ENOTSUP;
}
/* Check the authentication algorithm is supported by the code */
if (authdata) {
switch (authdata->algtype) {
case PDCP_AUTH_TYPE_NULL:
case PDCP_AUTH_TYPE_SNOW:
case PDCP_AUTH_TYPE_AES:
case PDCP_AUTH_TYPE_ZUC:
break;
default:
pr_err("Auth algorithm not supported: %d\n",
authdata->algtype);
return -ENOTSUP;
}
}
/* Check the Sequence Number size is supported by the code */
switch (sn_size) {
case PDCP_SN_SIZE_5:
case PDCP_SN_SIZE_7:
case PDCP_SN_SIZE_12:
case PDCP_SN_SIZE_15:
case PDCP_SN_SIZE_18:
break;
default:
pr_err("SN size not supported: %d\n", sn_size);
return -ENOTSUP;
}
/* Check that we are not performing ZUC algo on old platforms */
if (cipherdata->algtype == PDCP_CIPHER_TYPE_ZUC &&
rta_sec_era < RTA_SEC_ERA_5) {
pr_err("ZUC algorithm not supported for era: %d\n",
rta_sec_era);
return -ENOTSUP;
}
/* Initialize the program */
PROGRAM_CNTXT_INIT(p, descbuf, 0);
if (swap)
PROGRAM_SET_BSWAP(p);
if (ps)
PROGRAM_SET_36BIT_ADDR(p);
/* Select the shared descriptor sharing mode */
if (authdata)
SHR_HDR(p, desc_share[cipherdata->algtype][authdata->algtype],
0, 0);
else
SHR_HDR(p, SHR_ALWAYS, 0, 0);
/* Construct the PDB */
pdb_type = cnstr_pdcp_u_plane_pdb(p, sn_size, hfn, bearer, direction,
hfn_threshold, cipherdata, authdata);
if (pdb_type == PDCP_PDB_TYPE_INVALID) {
pr_err("Error creating PDCP UPlane PDB\n");
return -EINVAL;
}
SET_LABEL(p, pdb_end);
/* Inser the HFN override operation */
DPDK: Upgrade to 21.11.2.
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err = insert_hfn_ov_op(p, sn_size, pdb_type, era_2_sw_hfn_ovrd, false);
DPDK: upgrade to DPDK 20.11.0(LTS).
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if (err)
return err;
/* Create the descriptor */
if (!authdata) {
if (cipherdata->algtype == PDCP_CIPHER_TYPE_NULL) {
insert_copy_frame_op(p, cipherdata,
OP_TYPE_ENCAP_PROTOCOL);
} else {
err = pdcp_sdap_insert_no_int_op(p, swap, cipherdata,
caps_mode,
DPDK: Upgrade to 21.11.2.
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sn_size, pdb_type);
DPDK: upgrade to DPDK 20.11.0(LTS).
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if (err) {
pr_err("Fail pdcp_sdap_insert_no_int_op\n");
return err;
}
}
} else {
err = pdcp_sdap_insert_with_int_op(p, swap, cipherdata,
authdata, sn_size,
era_2_sw_hfn_ovrd,
DPDK: Upgrade to 21.11.2.
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caps_mode, pdb_type);
DPDK: upgrade to DPDK 20.11.0(LTS).
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if (err) {
pr_err("Fail pdcp_sdap_insert_with_int_op\n");
return err;
}
}
PATCH_HDR(p, 0, pdb_end);
return PROGRAM_FINALIZE(p);
}
/**
* cnstr_shdsc_pdcp_sdap_u_plane_encap - Function for creating a PDCP-SDAP
* User Plane encapsulation descriptor.
* @descbuf: pointer to buffer for descriptor construction
* @ps: if 36/40bit addressing is desired, this parameter must be true
* @swap: must be true when core endianness doesn't match SEC endianness
* @sn_size: selects Sequence Number Size: 7/12/15 bits
* @hfn: starting Hyper Frame Number to be used together with the SN from the
* PDCP frames.
* @bearer: radio bearer ID
* @direction: the direction of the PDCP frame (UL/DL)
* @hfn_threshold: HFN value that once reached triggers a warning from SEC that
* keys should be renegotiated at the earliest convenience.
* @cipherdata: pointer to block cipher transform definitions
* Valid algorithm values are those from cipher_type_pdcp enum.
* @era_2_sw_hfn_ovrd: if software HFN override mechanism is desired for
* this descriptor. Note: Can only be used for
* SEC ERA 2.
*
* Return: size of descriptor written in words or negative number on error.
* Once the function returns, the value of this parameter can be used
* for reclaiming the space that wasn't used for the descriptor.
*
* Note: descbuf must be large enough to contain a full 256 byte long
* descriptor; after the function returns, by subtracting the actual number of
* bytes used, the user can reuse the remaining buffer space for other purposes.
*/
static inline int
cnstr_shdsc_pdcp_sdap_u_plane_encap(uint32_t *descbuf,
bool ps,
bool swap,
enum pdcp_sn_size sn_size,
uint32_t hfn,
unsigned short bearer,
unsigned short direction,
uint32_t hfn_threshold,
struct alginfo *cipherdata,
struct alginfo *authdata,
unsigned char era_2_sw_hfn_ovrd)
{
return cnstr_shdsc_pdcp_sdap_u_plane(descbuf, ps, swap, sn_size,
hfn, bearer, direction, hfn_threshold, cipherdata,
authdata, era_2_sw_hfn_ovrd, OP_TYPE_ENCAP_PROTOCOL);
}
/**
* cnstr_shdsc_pdcp_sdap_u_plane_decap - Function for creating a PDCP-SDAP
* User Plane decapsulation descriptor.
* @descbuf: pointer to buffer for descriptor construction
* @ps: if 36/40bit addressing is desired, this parameter must be true
* @swap: must be true when core endianness doesn't match SEC endianness
* @sn_size: selects Sequence Number Size: 7/12/15 bits
* @hfn: starting Hyper Frame Number to be used together with the SN from the
* PDCP frames.
* @bearer: radio bearer ID
* @direction: the direction of the PDCP frame (UL/DL)
* @hfn_threshold: HFN value that once reached triggers a warning from SEC that
* keys should be renegotiated at the earliest convenience.
* @cipherdata: pointer to block cipher transform definitions
* Valid algorithm values are those from cipher_type_pdcp enum.
* @era_2_sw_hfn_ovrd: if software HFN override mechanism is desired for
* this descriptor. Note: Can only be used for
* SEC ERA 2.
*
* Return: size of descriptor written in words or negative number on error.
* Once the function returns, the value of this parameter can be used
* for reclaiming the space that wasn't used for the descriptor.
*
* Note: descbuf must be large enough to contain a full 256 byte long
* descriptor; after the function returns, by subtracting the actual number of
* bytes used, the user can reuse the remaining buffer space for other purposes.
*/
static inline int
cnstr_shdsc_pdcp_sdap_u_plane_decap(uint32_t *descbuf,
bool ps,
bool swap,
enum pdcp_sn_size sn_size,
uint32_t hfn,
unsigned short bearer,
unsigned short direction,
uint32_t hfn_threshold,
struct alginfo *cipherdata,
struct alginfo *authdata,
unsigned char era_2_sw_hfn_ovrd)
{
return cnstr_shdsc_pdcp_sdap_u_plane(descbuf, ps, swap, sn_size, hfn,
bearer, direction, hfn_threshold, cipherdata, authdata,
era_2_sw_hfn_ovrd, OP_TYPE_DECAP_PROTOCOL);
}
#endif /* __DESC_SDAP_H__ */