mirror of
https://github.com/openharmony/third_party_liburing.git
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ohci1
4b8f3098a5
Co-authored-by: Pavel Begunkov<asml.silence@gmail.com> Co-authored-by: Guillem Jover<guillem@hadrons.org> Co-authored-by: Jens Axboe<axboe@kernel.dk> Co-authored-by: Khem Raj<raj.khem@gmail.com> Co-authored-by: Michael de Lang<kingoipo@gmail.com> Co-authored-by: David Disseldorp<ddiss@suse.de> Co-authored-by: Ming Lei<ming.lei@redhat.com>
172 lines
3.0 KiB
C
172 lines
3.0 KiB
C
/* SPDX-License-Identifier: MIT */
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/*
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* Description: Helpers for NVMe uring passthrough commands
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*/
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#ifndef LIBURING_NVME_H
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#define LIBURING_NVME_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <sys/ioctl.h>
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#include <linux/nvme_ioctl.h>
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/*
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* If the uapi headers installed on the system lacks nvme uring command
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* support, use the local version to prevent compilation issues.
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*/
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#ifndef CONFIG_HAVE_NVME_URING
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struct nvme_uring_cmd {
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__u8 opcode;
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__u8 flags;
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__u16 rsvd1;
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__u32 nsid;
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__u32 cdw2;
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__u32 cdw3;
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__u64 metadata;
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__u64 addr;
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__u32 metadata_len;
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__u32 data_len;
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__u32 cdw10;
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__u32 cdw11;
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__u32 cdw12;
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__u32 cdw13;
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__u32 cdw14;
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__u32 cdw15;
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__u32 timeout_ms;
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__u32 rsvd2;
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};
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#define NVME_URING_CMD_IO _IOWR('N', 0x80, struct nvme_uring_cmd)
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#define NVME_URING_CMD_IO_VEC _IOWR('N', 0x81, struct nvme_uring_cmd)
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#endif /* CONFIG_HAVE_NVME_URING */
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#define NVME_DEFAULT_IOCTL_TIMEOUT 0
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#define NVME_IDENTIFY_DATA_SIZE 4096
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#define NVME_IDENTIFY_CSI_SHIFT 24
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#define NVME_IDENTIFY_CNS_NS 0
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#define NVME_CSI_NVM 0
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enum nvme_admin_opcode {
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nvme_admin_identify = 0x06,
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};
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enum nvme_io_opcode {
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nvme_cmd_write = 0x01,
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nvme_cmd_read = 0x02,
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};
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static int nsid;
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static __u32 lba_shift;
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static __u32 meta_size;
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struct nvme_lbaf {
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__le16 ms;
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__u8 ds;
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__u8 rp;
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};
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struct nvme_id_ns {
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__le64 nsze;
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__le64 ncap;
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__le64 nuse;
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__u8 nsfeat;
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__u8 nlbaf;
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__u8 flbas;
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__u8 mc;
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__u8 dpc;
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__u8 dps;
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__u8 nmic;
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__u8 rescap;
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__u8 fpi;
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__u8 dlfeat;
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__le16 nawun;
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__le16 nawupf;
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__le16 nacwu;
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__le16 nabsn;
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__le16 nabo;
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__le16 nabspf;
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__le16 noiob;
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__u8 nvmcap[16];
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__le16 npwg;
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__le16 npwa;
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__le16 npdg;
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__le16 npda;
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__le16 nows;
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__le16 mssrl;
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__le32 mcl;
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__u8 msrc;
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__u8 rsvd81[11];
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__le32 anagrpid;
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__u8 rsvd96[3];
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__u8 nsattr;
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__le16 nvmsetid;
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__le16 endgid;
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__u8 nguid[16];
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__u8 eui64[8];
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struct nvme_lbaf lbaf[16];
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__u8 rsvd192[192];
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__u8 vs[3712];
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};
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static inline int ilog2(uint32_t i)
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{
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int log = -1;
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while (i) {
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i >>= 1;
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log++;
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}
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return log;
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}
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__attribute__((__unused__))
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static int nvme_get_info(const char *file)
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{
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struct nvme_id_ns ns;
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int fd, err;
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__u32 lba_size;
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fd = open(file, O_RDONLY);
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if (fd < 0) {
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perror("file open");
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return -errno;
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}
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nsid = ioctl(fd, NVME_IOCTL_ID);
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if (nsid < 0) {
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close(fd);
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return -errno;
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}
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struct nvme_passthru_cmd cmd = {
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.opcode = nvme_admin_identify,
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.nsid = nsid,
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.addr = (__u64)(uintptr_t)&ns,
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.data_len = NVME_IDENTIFY_DATA_SIZE,
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.cdw10 = NVME_IDENTIFY_CNS_NS,
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.cdw11 = NVME_CSI_NVM << NVME_IDENTIFY_CSI_SHIFT,
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.timeout_ms = NVME_DEFAULT_IOCTL_TIMEOUT,
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};
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err = ioctl(fd, NVME_IOCTL_ADMIN_CMD, &cmd);
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if (err) {
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close(fd);
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return err;
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}
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lba_size = 1 << ns.lbaf[(ns.flbas & 0x0f)].ds;
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lba_shift = ilog2(lba_size);
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meta_size = ns.lbaf[(ns.flbas & 0x0f)].ms;
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close(fd);
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return 0;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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