| #ifndef SG_PT_LINUX_H |
| #define SG_PT_LINUX_H |
| |
| /* |
| * Copyright (c) 2017 Douglas Gilbert. |
| * All rights reserved. |
| * Use of this source code is governed by a BSD-style |
| * license that can be found in the BSD_LICENSE file. |
| */ |
| |
| #include <stdint.h> |
| #include <stdbool.h> |
| |
| #include <linux/types.h> |
| |
| #include "sg_pt_nvme.h" |
| |
| /* This header is for internal use by the sg3_utils library (libsgutils) |
| * and is Linux specific. Best not to include it directly in code that |
| * is meant to be OS independent. */ |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #ifndef HAVE_LINUX_BSG_H |
| |
| #define BSG_PROTOCOL_SCSI 0 |
| |
| #define BSG_SUB_PROTOCOL_SCSI_CMD 0 |
| #define BSG_SUB_PROTOCOL_SCSI_TMF 1 |
| #define BSG_SUB_PROTOCOL_SCSI_TRANSPORT 2 |
| |
| /* |
| * For flag constants below: |
| * sg.h sg_io_hdr also has bits defined for it's flags member. These |
| * two flag values (0x10 and 0x20) have the same meaning in sg.h . For |
| * bsg the BSG_FLAG_Q_AT_HEAD flag is ignored since it is the default. |
| */ |
| #define BSG_FLAG_Q_AT_TAIL 0x10 /* default is Q_AT_HEAD */ |
| #define BSG_FLAG_Q_AT_HEAD 0x20 |
| |
| struct sg_io_v4 { |
| __s32 guard; /* [i] 'Q' to differentiate from v3 */ |
| __u32 protocol; /* [i] 0 -> SCSI , .... */ |
| __u32 subprotocol; /* [i] 0 -> SCSI command, 1 -> SCSI task |
| management function, .... */ |
| |
| __u32 request_len; /* [i] in bytes */ |
| __u64 request; /* [i], [*i] {SCSI: cdb} */ |
| __u64 request_tag; /* [i] {SCSI: task tag (only if flagged)} */ |
| __u32 request_attr; /* [i] {SCSI: task attribute} */ |
| __u32 request_priority; /* [i] {SCSI: task priority} */ |
| __u32 request_extra; /* [i] {spare, for padding} */ |
| __u32 max_response_len; /* [i] in bytes */ |
| __u64 response; /* [i], [*o] {SCSI: (auto)sense data} */ |
| |
| /* "dout_": data out (to device); "din_": data in (from device) */ |
| __u32 dout_iovec_count; /* [i] 0 -> "flat" dout transfer else |
| dout_xfer points to array of iovec */ |
| __u32 dout_xfer_len; /* [i] bytes to be transferred to device */ |
| __u32 din_iovec_count; /* [i] 0 -> "flat" din transfer */ |
| __u32 din_xfer_len; /* [i] bytes to be transferred from device */ |
| __u64 dout_xferp; /* [i], [*i] */ |
| __u64 din_xferp; /* [i], [*o] */ |
| |
| __u32 timeout; /* [i] units: millisecond */ |
| __u32 flags; /* [i] bit mask */ |
| __u64 usr_ptr; /* [i->o] unused internally */ |
| __u32 spare_in; /* [i] */ |
| |
| __u32 driver_status; /* [o] 0 -> ok */ |
| __u32 transport_status; /* [o] 0 -> ok */ |
| __u32 device_status; /* [o] {SCSI: command completion status} */ |
| __u32 retry_delay; /* [o] {SCSI: status auxiliary information} */ |
| __u32 info; /* [o] additional information */ |
| __u32 duration; /* [o] time to complete, in milliseconds */ |
| __u32 response_len; /* [o] bytes of response actually written */ |
| __s32 din_resid; /* [o] din_xfer_len - actual_din_xfer_len */ |
| __s32 dout_resid; /* [o] dout_xfer_len - actual_dout_xfer_len */ |
| __u64 generated_tag; /* [o] {SCSI: transport generated task tag} */ |
| __u32 spare_out; /* [o] */ |
| |
| __u32 padding; |
| }; |
| |
| #else |
| |
| #include <linux/bsg.h> |
| |
| #endif |
| |
| |
| struct sg_pt_linux_scsi { |
| struct sg_io_v4 io_hdr; /* use v4 header as it is more general */ |
| /* Leave io_hdr in first place of this structure */ |
| bool is_sg; |
| bool is_bsg; |
| bool is_nvme; /* OS device type, if false ignore nvme_direct */ |
| bool nvme_direct; /* false: our SNTL; true: received NVMe command */ |
| bool mdxfer_out; /* direction of metadata xfer, true->data-out */ |
| bool scsi_dsense; /* SCSI descriptor sense active when true */ |
| int dev_fd; /* -1 if not given (yet) */ |
| int in_err; |
| int os_err; |
| uint32_t nvme_nsid; /* 1 to 0xfffffffe are possibly valid, 0 |
| * implies dev_fd is not a NVMe device |
| * (is_nvme=false) or it is a NVMe char |
| * device (e.g. /dev/nvme0 ) */ |
| uint32_t nvme_result; /* DW0 from completion queue */ |
| uint32_t nvme_status; /* SCT|SC: DW3 27:17 from completion queue, |
| * note: the DNR+More bit are not there. |
| * The whole 16 byte completion q entry is |
| * sent back as sense data */ |
| uint32_t mdxfer_len; |
| void * mdxferp; |
| uint8_t * nvme_id_ctlp; /* cached response to controller IDENTIFY */ |
| uint8_t * free_nvme_id_ctlp; |
| unsigned char tmf_request[4]; |
| }; |
| |
| struct sg_pt_base { |
| struct sg_pt_linux_scsi impl; |
| }; |
| |
| |
| #ifndef sg_nvme_admin_cmd |
| #define sg_nvme_admin_cmd sg_nvme_passthru_cmd |
| #endif |
| |
| /* Linux NVMe related ioctls */ |
| #ifndef NVME_IOCTL_ID |
| #define NVME_IOCTL_ID _IO('N', 0x40) |
| #endif |
| #ifndef NVME_IOCTL_ADMIN_CMD |
| #define NVME_IOCTL_ADMIN_CMD _IOWR('N', 0x41, struct sg_nvme_admin_cmd) |
| #endif |
| #ifndef NVME_IOCTL_SUBMIT_IO |
| #define NVME_IOCTL_SUBMIT_IO _IOW('N', 0x42, struct sg_nvme_user_io) |
| #endif |
| #ifndef NVME_IOCTL_IO_CMD |
| #define NVME_IOCTL_IO_CMD _IOWR('N', 0x43, struct sg_nvme_passthru_cmd) |
| #endif |
| #ifndef NVME_IOCTL_RESET |
| #define NVME_IOCTL_RESET _IO('N', 0x44) |
| #endif |
| #ifndef NVME_IOCTL_SUBSYS_RESET |
| #define NVME_IOCTL_SUBSYS_RESET _IO('N', 0x45) |
| #endif |
| |
| extern bool sg_bsg_nvme_char_major_checked; |
| extern int sg_bsg_major; |
| extern volatile int sg_nvme_char_major; |
| extern long sg_lin_page_size; |
| |
| void sg_find_bsg_nvme_char_major(int verbose); |
| int sg_do_nvme_pt(struct sg_pt_base * vp, int fd, int time_secs, int vb); |
| |
| /* This trims given NVMe block device name in Linux (e.g. /dev/nvme0n1p5) |
| * to the name of its associated char device (e.g. /dev/nvme0). If this |
| * occurs true is returned and the char device name is placed in 'b' (as |
| * long as b_len is sufficient). Otherwise false is returned. */ |
| bool sg_get_nvme_char_devname(const char * nvme_block_devname, uint32_t b_len, |
| char * b); |
| |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* end of SG_PT_LINUX_H */ |
