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uinput.h [ edit | delete | rename | download ] [FILE] uio.h [ edit | delete | rename | download ] [FILE] ultrasound.h [ edit | delete | rename | download ] [FILE] un.h [ edit | delete | rename | download ] [FILE] unistd.h [ edit | delete | rename | download ] [FILE] unix_diag.h [ edit | delete | rename | download ] [FILE] usbdevice_fs.h [ edit | delete | rename | download ] [FILE] userfaultfd.h [ edit | delete | rename | download ] [FILE] utime.h [ edit | delete | rename | download ] [FILE] utsname.h [ edit | delete | rename | download ] [FILE] uuid.h [ edit | delete | rename | download ] [FILE] uvcvideo.h [ edit | delete | rename | download ] [FILE] v4l2-common.h [ edit | delete | rename | download ] [FILE] v4l2-controls.h [ edit | delete | rename | download ] [FILE] v4l2-dv-timings.h [ edit | delete | rename | download ] [FILE] v4l2-mediabus.h [ edit | delete | rename | download ] [FILE] v4l2-subdev.h [ edit | delete | rename | download ] [FILE] version.h [ edit | delete | rename | 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virtio_types.h [ edit | delete | rename | download ] [FILE] virtio_vsock.h [ edit | delete | rename | download ] [FILE] vm_sockets.h [ edit | delete | rename | download ] [FILE] vsockmon.h [ edit | delete | rename | download ] [FILE] vt.h [ edit | delete | rename | download ] [FILE] vtpm_proxy.h [ edit | delete | rename | download ] [FILE] vzcalluser.h [ edit | delete | rename | download ] [FILE] vzctl_netstat.h [ edit | delete | rename | download ] [FILE] vzctl_venet.h [ edit | delete | rename | download ] [FILE] vzctl_veth.h [ edit | delete | rename | download ] [FILE] vziptable_defs.h [ edit | delete | rename | download ] [FILE] vzlist.h [ edit | delete | rename | download ] [FILE] wait.h [ edit | delete | rename | download ] [FILE] wanrouter.h [ edit | delete | rename | download ] [FILE] watchdog.h [ edit | delete | rename | download ] [FILE] wimax.h [ edit | delete | rename | download ] [FILE] wireless.h [ edit | delete | rename | download ] [FILE] x25.h [ edit | delete | rename | download ] [FILE] xattr.h [ edit | delete | rename | download ] [FILE] xfrm.h [ edit | delete | rename | download ] Viewing: /usr/include/linux/target_core_user.h #ifndef __TARGET_CORE_USER_H #define __TARGET_CORE_USER_H /* This header will be used by application too */ #include <linux/types.h> #include <linux/uio.h> #define TCMU_VERSION "2.0" /* * Ring Design * ----------- * * The mmaped area is divided into three parts: * 1) The mailbox (struct tcmu_mailbox, below) * 2) The command ring * 3) Everything beyond the command ring (data) * * The mailbox tells userspace the offset of the command ring from the * start of the shared memory region, and how big the command ring is. * * The kernel passes SCSI commands to userspace by putting a struct * tcmu_cmd_entry in the ring, updating mailbox->cmd_head, and poking * userspace via uio's interrupt mechanism. * * tcmu_cmd_entry contains a header. If the header type is PAD, * userspace should skip hdr->length bytes (mod cmdr_size) to find the * next cmd_entry. * * Otherwise, the entry will contain offsets into the mmaped area that * contain the cdb and data buffers -- the latter accessible via the * iov array. iov addresses are also offsets into the shared area. * * When userspace is completed handling the command, set * entry->rsp.scsi_status, fill in rsp.sense_buffer if appropriate, * and also set mailbox->cmd_tail equal to the old cmd_tail plus * hdr->length, mod cmdr_size. If cmd_tail doesn't equal cmd_head, it * should process the next packet the same way, and so on. */ #define TCMU_MAILBOX_VERSION 2 #define ALIGN_SIZE 64 /* Should be enough for most CPUs */ #define TCMU_MAILBOX_FLAG_CAP_OOOC (1 << 0) /* Out-of-order completions */ struct tcmu_mailbox { __u16 version; __u16 flags; __u32 cmdr_off; __u32 cmdr_size; __u32 cmd_head; /* Updated by user. On its own cacheline */ __u32 cmd_tail __attribute__((__aligned__(ALIGN_SIZE))); } __attribute__((packed)); enum tcmu_opcode { TCMU_OP_PAD = 0, TCMU_OP_CMD, }; /* * Only a few opcodes, and length is 8-byte aligned, so use low bits for opcode. */ struct tcmu_cmd_entry_hdr { __u32 len_op; __u16 cmd_id; __u8 kflags; #define TCMU_UFLAG_UNKNOWN_OP 0x1 __u8 uflags; } __attribute__((packed)); #define TCMU_OP_MASK 0x7 static __inline__ enum tcmu_opcode tcmu_hdr_get_op(__u32 len_op) { return len_op & TCMU_OP_MASK; } static __inline__ void tcmu_hdr_set_op(__u32 *len_op, enum tcmu_opcode op) { *len_op &= ~TCMU_OP_MASK; *len_op |= (op & TCMU_OP_MASK); } static __inline__ __u32 tcmu_hdr_get_len(__u32 len_op) { return len_op & ~TCMU_OP_MASK; } static __inline__ void tcmu_hdr_set_len(__u32 *len_op, __u32 len) { *len_op &= TCMU_OP_MASK; *len_op |= len; } /* Currently the same as SCSI_SENSE_BUFFERSIZE */ #define TCMU_SENSE_BUFFERSIZE 96 struct tcmu_cmd_entry { struct tcmu_cmd_entry_hdr hdr; union { struct { uint32_t iov_cnt; uint32_t iov_bidi_cnt; uint32_t iov_dif_cnt; uint64_t cdb_off; uint64_t __pad1; uint64_t __pad2; struct iovec iov[0]; } req; struct { uint8_t scsi_status; uint8_t __pad1; uint16_t __pad2; uint32_t __pad3; char sense_buffer[TCMU_SENSE_BUFFERSIZE]; } rsp; }; } __attribute__((packed)); #define TCMU_OP_ALIGN_SIZE sizeof(uint64_t) enum tcmu_genl_cmd { TCMU_CMD_UNSPEC, TCMU_CMD_ADDED_DEVICE, TCMU_CMD_REMOVED_DEVICE, TCMU_CMD_RECONFIG_DEVICE, TCMU_CMD_ADDED_DEVICE_DONE, TCMU_CMD_REMOVED_DEVICE_DONE, TCMU_CMD_RECONFIG_DEVICE_DONE, TCMU_CMD_SET_FEATURES, __TCMU_CMD_MAX, }; #define TCMU_CMD_MAX (__TCMU_CMD_MAX - 1) enum tcmu_genl_attr { TCMU_ATTR_UNSPEC, TCMU_ATTR_DEVICE, TCMU_ATTR_MINOR, TCMU_ATTR_PAD, TCMU_ATTR_DEV_CFG, TCMU_ATTR_DEV_SIZE, TCMU_ATTR_WRITECACHE, TCMU_ATTR_CMD_STATUS, TCMU_ATTR_DEVICE_ID, TCMU_ATTR_SUPP_KERN_CMD_REPLY, __TCMU_ATTR_MAX, }; #define TCMU_ATTR_MAX (__TCMU_ATTR_MAX - 1) #endif