mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-29 23:53:32 +00:00
5224f79096
There is a regular need in the kernel to provide a way to declare
having a dynamically sized set of trailing elements in a structure.
Kernel code should always use “flexible array members”[1] for these
cases. The older style of one-element or zero-length arrays should
no longer be used[2].
This code was transformed with the help of Coccinelle:
(next-20220214$ spatch --jobs $(getconf _NPROCESSORS_ONLN) --sp-file script.cocci --include-headers --dir . > output.patch)
@@
identifier S, member, array;
type T1, T2;
@@
struct S {
...
T1 member;
T2 array[
- 0
];
};
UAPI and wireless changes were intentionally excluded from this patch
and will be sent out separately.
[1] https://en.wikipedia.org/wiki/Flexible_array_member
[2] https://www.kernel.org/doc/html/v5.16/process/deprecated.html#zero-length-and-one-element-arrays
Link: https://github.com/KSPP/linux/issues/78
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
312 lines
7.9 KiB
C
312 lines
7.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Functions for assembling fcx enabled I/O control blocks.
|
|
*
|
|
* Copyright IBM Corp. 2008
|
|
* Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
|
|
*/
|
|
|
|
#ifndef _ASM_S390_FCX_H
|
|
#define _ASM_S390_FCX_H
|
|
|
|
#include <linux/types.h>
|
|
|
|
#define TCW_FORMAT_DEFAULT 0
|
|
#define TCW_TIDAW_FORMAT_DEFAULT 0
|
|
#define TCW_FLAGS_INPUT_TIDA (1 << (23 - 5))
|
|
#define TCW_FLAGS_TCCB_TIDA (1 << (23 - 6))
|
|
#define TCW_FLAGS_OUTPUT_TIDA (1 << (23 - 7))
|
|
#define TCW_FLAGS_TIDAW_FORMAT(x) ((x) & 3) << (23 - 9)
|
|
#define TCW_FLAGS_GET_TIDAW_FORMAT(x) (((x) >> (23 - 9)) & 3)
|
|
|
|
/**
|
|
* struct tcw - Transport Control Word (TCW)
|
|
* @format: TCW format
|
|
* @flags: TCW flags
|
|
* @tccbl: Transport-Command-Control-Block Length
|
|
* @r: Read Operations
|
|
* @w: Write Operations
|
|
* @output: Output-Data Address
|
|
* @input: Input-Data Address
|
|
* @tsb: Transport-Status-Block Address
|
|
* @tccb: Transport-Command-Control-Block Address
|
|
* @output_count: Output Count
|
|
* @input_count: Input Count
|
|
* @intrg: Interrogate TCW Address
|
|
*/
|
|
struct tcw {
|
|
u32 format:2;
|
|
u32 :6;
|
|
u32 flags:24;
|
|
u32 :8;
|
|
u32 tccbl:6;
|
|
u32 r:1;
|
|
u32 w:1;
|
|
u32 :16;
|
|
u64 output;
|
|
u64 input;
|
|
u64 tsb;
|
|
u64 tccb;
|
|
u32 output_count;
|
|
u32 input_count;
|
|
u32 :32;
|
|
u32 :32;
|
|
u32 :32;
|
|
u32 intrg;
|
|
} __attribute__ ((packed, aligned(64)));
|
|
|
|
#define TIDAW_FLAGS_LAST (1 << (7 - 0))
|
|
#define TIDAW_FLAGS_SKIP (1 << (7 - 1))
|
|
#define TIDAW_FLAGS_DATA_INT (1 << (7 - 2))
|
|
#define TIDAW_FLAGS_TTIC (1 << (7 - 3))
|
|
#define TIDAW_FLAGS_INSERT_CBC (1 << (7 - 4))
|
|
|
|
/**
|
|
* struct tidaw - Transport-Indirect-Addressing Word (TIDAW)
|
|
* @flags: TIDAW flags. Can be an arithmetic OR of the following constants:
|
|
* %TIDAW_FLAGS_LAST, %TIDAW_FLAGS_SKIP, %TIDAW_FLAGS_DATA_INT,
|
|
* %TIDAW_FLAGS_TTIC, %TIDAW_FLAGS_INSERT_CBC
|
|
* @count: Count
|
|
* @addr: Address
|
|
*/
|
|
struct tidaw {
|
|
u32 flags:8;
|
|
u32 :24;
|
|
u32 count;
|
|
u64 addr;
|
|
} __attribute__ ((packed, aligned(16)));
|
|
|
|
/**
|
|
* struct tsa_iostat - I/O-Status Transport-Status Area (IO-Stat TSA)
|
|
* @dev_time: Device Time
|
|
* @def_time: Defer Time
|
|
* @queue_time: Queue Time
|
|
* @dev_busy_time: Device-Busy Time
|
|
* @dev_act_time: Device-Active-Only Time
|
|
* @sense: Sense Data (if present)
|
|
*/
|
|
struct tsa_iostat {
|
|
u32 dev_time;
|
|
u32 def_time;
|
|
u32 queue_time;
|
|
u32 dev_busy_time;
|
|
u32 dev_act_time;
|
|
u8 sense[32];
|
|
} __attribute__ ((packed));
|
|
|
|
/**
|
|
* struct tsa_ddpcs - Device-Detected-Program-Check Transport-Status Area (DDPC TSA)
|
|
* @rc: Reason Code
|
|
* @rcq: Reason Code Qualifier
|
|
* @sense: Sense Data (if present)
|
|
*/
|
|
struct tsa_ddpc {
|
|
u32 :24;
|
|
u32 rc:8;
|
|
u8 rcq[16];
|
|
u8 sense[32];
|
|
} __attribute__ ((packed));
|
|
|
|
#define TSA_INTRG_FLAGS_CU_STATE_VALID (1 << (7 - 0))
|
|
#define TSA_INTRG_FLAGS_DEV_STATE_VALID (1 << (7 - 1))
|
|
#define TSA_INTRG_FLAGS_OP_STATE_VALID (1 << (7 - 2))
|
|
|
|
/**
|
|
* struct tsa_intrg - Interrogate Transport-Status Area (Intrg. TSA)
|
|
* @format: Format
|
|
* @flags: Flags. Can be an arithmetic OR of the following constants:
|
|
* %TSA_INTRG_FLAGS_CU_STATE_VALID, %TSA_INTRG_FLAGS_DEV_STATE_VALID,
|
|
* %TSA_INTRG_FLAGS_OP_STATE_VALID
|
|
* @cu_state: Controle-Unit State
|
|
* @dev_state: Device State
|
|
* @op_state: Operation State
|
|
* @sd_info: State-Dependent Information
|
|
* @dl_id: Device-Level Identifier
|
|
* @dd_data: Device-Dependent Data
|
|
*/
|
|
struct tsa_intrg {
|
|
u32 format:8;
|
|
u32 flags:8;
|
|
u32 cu_state:8;
|
|
u32 dev_state:8;
|
|
u32 op_state:8;
|
|
u32 :24;
|
|
u8 sd_info[12];
|
|
u32 dl_id;
|
|
u8 dd_data[28];
|
|
} __attribute__ ((packed));
|
|
|
|
#define TSB_FORMAT_NONE 0
|
|
#define TSB_FORMAT_IOSTAT 1
|
|
#define TSB_FORMAT_DDPC 2
|
|
#define TSB_FORMAT_INTRG 3
|
|
|
|
#define TSB_FLAGS_DCW_OFFSET_VALID (1 << (7 - 0))
|
|
#define TSB_FLAGS_COUNT_VALID (1 << (7 - 1))
|
|
#define TSB_FLAGS_CACHE_MISS (1 << (7 - 2))
|
|
#define TSB_FLAGS_TIME_VALID (1 << (7 - 3))
|
|
#define TSB_FLAGS_FORMAT(x) ((x) & 7)
|
|
#define TSB_FORMAT(t) ((t)->flags & 7)
|
|
|
|
/**
|
|
* struct tsb - Transport-Status Block (TSB)
|
|
* @length: Length
|
|
* @flags: Flags. Can be an arithmetic OR of the following constants:
|
|
* %TSB_FLAGS_DCW_OFFSET_VALID, %TSB_FLAGS_COUNT_VALID, %TSB_FLAGS_CACHE_MISS,
|
|
* %TSB_FLAGS_TIME_VALID
|
|
* @dcw_offset: DCW Offset
|
|
* @count: Count
|
|
* @tsa: Transport-Status-Area
|
|
*/
|
|
struct tsb {
|
|
u32 length:8;
|
|
u32 flags:8;
|
|
u32 dcw_offset:16;
|
|
u32 count;
|
|
u32 :32;
|
|
union {
|
|
struct tsa_iostat iostat;
|
|
struct tsa_ddpc ddpc;
|
|
struct tsa_intrg intrg;
|
|
} __attribute__ ((packed)) tsa;
|
|
} __attribute__ ((packed, aligned(8)));
|
|
|
|
#define DCW_INTRG_FORMAT_DEFAULT 0
|
|
|
|
#define DCW_INTRG_RC_UNSPECIFIED 0
|
|
#define DCW_INTRG_RC_TIMEOUT 1
|
|
|
|
#define DCW_INTRG_RCQ_UNSPECIFIED 0
|
|
#define DCW_INTRG_RCQ_PRIMARY 1
|
|
#define DCW_INTRG_RCQ_SECONDARY 2
|
|
|
|
#define DCW_INTRG_FLAGS_MPM (1 << (7 - 0))
|
|
#define DCW_INTRG_FLAGS_PPR (1 << (7 - 1))
|
|
#define DCW_INTRG_FLAGS_CRIT (1 << (7 - 2))
|
|
|
|
/**
|
|
* struct dcw_intrg_data - Interrogate DCW data
|
|
* @format: Format. Should be %DCW_INTRG_FORMAT_DEFAULT
|
|
* @rc: Reason Code. Can be one of %DCW_INTRG_RC_UNSPECIFIED,
|
|
* %DCW_INTRG_RC_TIMEOUT
|
|
* @rcq: Reason Code Qualifier: Can be one of %DCW_INTRG_RCQ_UNSPECIFIED,
|
|
* %DCW_INTRG_RCQ_PRIMARY, %DCW_INTRG_RCQ_SECONDARY
|
|
* @lpm: Logical-Path Mask
|
|
* @pam: Path-Available Mask
|
|
* @pim: Path-Installed Mask
|
|
* @timeout: Timeout
|
|
* @flags: Flags. Can be an arithmetic OR of %DCW_INTRG_FLAGS_MPM,
|
|
* %DCW_INTRG_FLAGS_PPR, %DCW_INTRG_FLAGS_CRIT
|
|
* @time: Time
|
|
* @prog_id: Program Identifier
|
|
* @prog_data: Program-Dependent Data
|
|
*/
|
|
struct dcw_intrg_data {
|
|
u32 format:8;
|
|
u32 rc:8;
|
|
u32 rcq:8;
|
|
u32 lpm:8;
|
|
u32 pam:8;
|
|
u32 pim:8;
|
|
u32 timeout:16;
|
|
u32 flags:8;
|
|
u32 :24;
|
|
u32 :32;
|
|
u64 time;
|
|
u64 prog_id;
|
|
u8 prog_data[];
|
|
} __attribute__ ((packed));
|
|
|
|
#define DCW_FLAGS_CC (1 << (7 - 1))
|
|
|
|
#define DCW_CMD_WRITE 0x01
|
|
#define DCW_CMD_READ 0x02
|
|
#define DCW_CMD_CONTROL 0x03
|
|
#define DCW_CMD_SENSE 0x04
|
|
#define DCW_CMD_SENSE_ID 0xe4
|
|
#define DCW_CMD_INTRG 0x40
|
|
|
|
/**
|
|
* struct dcw - Device-Command Word (DCW)
|
|
* @cmd: Command Code. Can be one of %DCW_CMD_WRITE, %DCW_CMD_READ,
|
|
* %DCW_CMD_CONTROL, %DCW_CMD_SENSE, %DCW_CMD_SENSE_ID, %DCW_CMD_INTRG
|
|
* @flags: Flags. Can be an arithmetic OR of %DCW_FLAGS_CC
|
|
* @cd_count: Control-Data Count
|
|
* @count: Count
|
|
* @cd: Control Data
|
|
*/
|
|
struct dcw {
|
|
u32 cmd:8;
|
|
u32 flags:8;
|
|
u32 :8;
|
|
u32 cd_count:8;
|
|
u32 count;
|
|
u8 cd[];
|
|
} __attribute__ ((packed));
|
|
|
|
#define TCCB_FORMAT_DEFAULT 0x7f
|
|
#define TCCB_MAX_DCW 30
|
|
#define TCCB_MAX_SIZE (sizeof(struct tccb_tcah) + \
|
|
TCCB_MAX_DCW * sizeof(struct dcw) + \
|
|
sizeof(struct tccb_tcat))
|
|
#define TCCB_SAC_DEFAULT 0x1ffe
|
|
#define TCCB_SAC_INTRG 0x1fff
|
|
|
|
/**
|
|
* struct tccb_tcah - Transport-Command-Area Header (TCAH)
|
|
* @format: Format. Should be %TCCB_FORMAT_DEFAULT
|
|
* @tcal: Transport-Command-Area Length
|
|
* @sac: Service-Action Code. Can be one of %TCCB_SAC_DEFAULT, %TCCB_SAC_INTRG
|
|
* @prio: Priority
|
|
*/
|
|
struct tccb_tcah {
|
|
u32 format:8;
|
|
u32 :24;
|
|
u32 :24;
|
|
u32 tcal:8;
|
|
u32 sac:16;
|
|
u32 :8;
|
|
u32 prio:8;
|
|
u32 :32;
|
|
} __attribute__ ((packed));
|
|
|
|
/**
|
|
* struct tccb_tcat - Transport-Command-Area Trailer (TCAT)
|
|
* @count: Transport Count
|
|
*/
|
|
struct tccb_tcat {
|
|
u32 :32;
|
|
u32 count;
|
|
} __attribute__ ((packed));
|
|
|
|
/**
|
|
* struct tccb - (partial) Transport-Command-Control Block (TCCB)
|
|
* @tcah: TCAH
|
|
* @tca: Transport-Command Area
|
|
*/
|
|
struct tccb {
|
|
struct tccb_tcah tcah;
|
|
u8 tca[0];
|
|
} __attribute__ ((packed, aligned(8)));
|
|
|
|
struct tcw *tcw_get_intrg(struct tcw *tcw);
|
|
void *tcw_get_data(struct tcw *tcw);
|
|
struct tccb *tcw_get_tccb(struct tcw *tcw);
|
|
struct tsb *tcw_get_tsb(struct tcw *tcw);
|
|
|
|
void tcw_init(struct tcw *tcw, int r, int w);
|
|
void tcw_finalize(struct tcw *tcw, int num_tidaws);
|
|
|
|
void tcw_set_intrg(struct tcw *tcw, struct tcw *intrg_tcw);
|
|
void tcw_set_data(struct tcw *tcw, void *data, int use_tidal);
|
|
void tcw_set_tccb(struct tcw *tcw, struct tccb *tccb);
|
|
void tcw_set_tsb(struct tcw *tcw, struct tsb *tsb);
|
|
|
|
void tccb_init(struct tccb *tccb, size_t tccb_size, u32 sac);
|
|
void tsb_init(struct tsb *tsb);
|
|
struct dcw *tccb_add_dcw(struct tccb *tccb, size_t tccb_size, u8 cmd, u8 flags,
|
|
void *cd, u8 cd_count, u32 count);
|
|
struct tidaw *tcw_add_tidaw(struct tcw *tcw, int num_tidaws, u8 flags,
|
|
void *addr, u32 count);
|
|
|
|
#endif /* _ASM_S390_FCX_H */
|