diff options
Diffstat (limited to 'qemu/roms/seabios/src/hw/usb-uas.c')
| -rw-r--r-- | qemu/roms/seabios/src/hw/usb-uas.c | 274 |
1 files changed, 274 insertions, 0 deletions
diff --git a/qemu/roms/seabios/src/hw/usb-uas.c b/qemu/roms/seabios/src/hw/usb-uas.c new file mode 100644 index 000000000..6ef8d0912 --- /dev/null +++ b/qemu/roms/seabios/src/hw/usb-uas.c @@ -0,0 +1,274 @@ +// Code for handling usb attached scsi devices. +// +// only usb 2.0 for now. +// +// once we have xhci driver with usb 3.0 support this must +// be updated to use usb3 streams so booting from usb3 +// devices actually works. +// +// Authors: +// Gerd Hoffmann <kraxel@redhat.com> +// +// based on usb-msc.c which is written by: +// Kevin O'Connor <kevin@koconnor.net> +// +// This file may be distributed under the terms of the GNU LGPLv3 license. + +#include "biosvar.h" // GET_GLOBALFLAT +#include "block.h" // DTYPE_USB +#include "blockcmd.h" // cdb_read +#include "config.h" // CONFIG_USB_UAS +#include "malloc.h" // free +#include "output.h" // dprintf +#include "std/disk.h" // DISK_RET_SUCCESS +#include "string.h" // memset +#include "usb.h" // struct usb_s +#include "usb-uas.h" // usb_uas_init +#include "util.h" // bootprio_find_usb + +#define UAS_UI_COMMAND 0x01 +#define UAS_UI_SENSE 0x03 +#define UAS_UI_RESPONSE 0x04 +#define UAS_UI_TASK_MGMT 0x05 +#define UAS_UI_READ_READY 0x06 +#define UAS_UI_WRITE_READY 0x07 + +#define UAS_PIPE_ID_COMMAND 0x01 +#define UAS_PIPE_ID_STATUS 0x02 +#define UAS_PIPE_ID_DATA_IN 0x03 +#define UAS_PIPE_ID_DATA_OUT 0x04 + +typedef struct { + u8 id; + u8 reserved; + u16 tag; +} PACKED uas_ui_header; + +typedef struct { + u8 prio_taskattr; /* 6:3 priority, 2:0 task attribute */ + u8 reserved_1; + u8 add_cdb_length; /* 7:2 additional adb length (dwords) */ + u8 reserved_2; + u8 lun[8]; + u8 cdb[16]; + u8 add_cdb[]; +} PACKED uas_ui_command; + +typedef struct { + u16 status_qualifier; + u8 status; + u8 reserved[7]; + u16 sense_length; + u8 sense_data[18]; +} PACKED uas_ui_sense; + +typedef struct { + u16 add_response_info; + u8 response_code; +} PACKED uas_ui_response; + +typedef struct { + u8 function; + u8 reserved; + u16 task_tag; + u8 lun[8]; +} PACKED uas_ui_task_mgmt; + +typedef struct { + uas_ui_header hdr; + union { + uas_ui_command command; + uas_ui_sense sense; + uas_ui_task_mgmt task; + uas_ui_response response; + }; +} PACKED uas_ui; + +struct uasdrive_s { + struct drive_s drive; + struct usb_pipe *command, *status, *data_in, *data_out; + int lun; +}; + +int +uas_cmd_data(struct disk_op_s *op, void *cdbcmd, u16 blocksize) +{ + if (!CONFIG_USB_UAS) + return DISK_RET_EBADTRACK; + + struct uasdrive_s *drive_gf = container_of( + op->drive_gf, struct uasdrive_s, drive); + + uas_ui ui; + memset(&ui, 0, sizeof(ui)); + ui.hdr.id = UAS_UI_COMMAND; + ui.hdr.tag = 0xdead; + ui.command.lun[1] = GET_GLOBALFLAT(drive_gf->lun); + memcpy(ui.command.cdb, cdbcmd, sizeof(ui.command.cdb)); + int ret = usb_send_bulk(GET_GLOBALFLAT(drive_gf->command), + USB_DIR_OUT, MAKE_FLATPTR(GET_SEG(SS), &ui), + sizeof(ui.hdr) + sizeof(ui.command)); + if (ret) { + dprintf(1, "uas: command send fail"); + goto fail; + } + + memset(&ui, 0xff, sizeof(ui)); + ret = usb_send_bulk(GET_GLOBALFLAT(drive_gf->status), + USB_DIR_IN, MAKE_FLATPTR(GET_SEG(SS), &ui), sizeof(ui)); + if (ret) { + dprintf(1, "uas: status recv fail"); + goto fail; + } + + switch (ui.hdr.id) { + case UAS_UI_SENSE: + goto have_sense; + case UAS_UI_READ_READY: + ret = usb_send_bulk(GET_GLOBALFLAT(drive_gf->data_in), + USB_DIR_IN, op->buf_fl, op->count * blocksize); + if (ret) { + dprintf(1, "uas: data read fail"); + goto fail; + } + break; + case UAS_UI_WRITE_READY: + ret = usb_send_bulk(GET_GLOBALFLAT(drive_gf->data_out), + USB_DIR_OUT, op->buf_fl, op->count * blocksize); + if (ret) { + dprintf(1, "uas: data write fail"); + goto fail; + } + break; + default: + dprintf(1, "uas: unknown status ui id %d", ui.hdr.id); + goto fail; + } + + memset(&ui, 0xff, sizeof(ui)); + ret = usb_send_bulk(GET_GLOBALFLAT(drive_gf->status), + USB_DIR_IN, MAKE_FLATPTR(GET_SEG(SS), &ui), sizeof(ui)); + if (ret) { + dprintf(1, "uas: status recv fail"); + goto fail; + } + if (ui.hdr.id != UAS_UI_SENSE) { + dprintf(1, "uas: expected sense ui, got ui id %d", ui.hdr.id); + goto fail; + } + +have_sense: + if (ui.sense.status == 0) { + return DISK_RET_SUCCESS; + } + +fail: + return DISK_RET_EBADTRACK; +} + +static int +uas_lun_setup(struct usbdevice_s *usbdev, + struct usb_pipe *command, struct usb_pipe *status, + struct usb_pipe *data_in, struct usb_pipe *data_out, + int lun) +{ + // Allocate drive structure. + struct uasdrive_s *drive = malloc_fseg(sizeof(*drive)); + if (!drive) { + warn_noalloc(); + return -1; + } + memset(drive, 0, sizeof(*drive)); + if (usb_32bit_pipe(data_in)) + drive->drive.type = DTYPE_UAS_32; + else + drive->drive.type = DTYPE_UAS; + drive->command = command; + drive->status = status; + drive->data_in = data_in; + drive->data_out = data_out; + drive->lun = lun; + + int prio = bootprio_find_usb(usbdev, lun); + int ret = scsi_drive_setup(&drive->drive, "USB UAS", prio); + if (ret) { + free(drive); + return -1; + } + return 0; +} + +int +usb_uas_setup(struct usbdevice_s *usbdev) +{ + if (!CONFIG_USB_UAS) + return -1; + + // Verify right kind of device + struct usb_interface_descriptor *iface = usbdev->iface; + if (iface->bInterfaceSubClass != US_SC_SCSI || + iface->bInterfaceProtocol != US_PR_UAS) { + dprintf(1, "Unsupported UAS device (subclass=%02x proto=%02x)\n" + , iface->bInterfaceSubClass, iface->bInterfaceProtocol); + return -1; + } + + /* find & allocate pipes */ + struct usb_endpoint_descriptor *ep = NULL; + struct usb_pipe *command = NULL; + struct usb_pipe *status = NULL; + struct usb_pipe *data_in = NULL; + struct usb_pipe *data_out = NULL; + u8 *desc = (u8*)iface; + while (desc) { + desc += desc[0]; + switch (desc[1]) { + case USB_DT_ENDPOINT: + ep = (void*)desc; + break; + case USB_DT_ENDPOINT_COMPANION: + /* No support (yet) for usb3 streams */ + dprintf(1, "Superspeed UAS devices not supported (yet)\n"); + goto fail; + case 0x24: + switch (desc[2]) { + case UAS_PIPE_ID_COMMAND: + command = usb_alloc_pipe(usbdev, ep); + break; + case UAS_PIPE_ID_STATUS: + status = usb_alloc_pipe(usbdev, ep); + break; + case UAS_PIPE_ID_DATA_IN: + data_in = usb_alloc_pipe(usbdev, ep); + break; + case UAS_PIPE_ID_DATA_OUT: + data_out = usb_alloc_pipe(usbdev, ep); + break; + default: + goto fail; + } + break; + default: + desc = NULL; + break; + } + } + if (!command || !status || !data_in || !data_out) + goto fail; + + /* TODO: send REPORT LUNS. For now, only LUN 0 is recognized. */ + int ret = uas_lun_setup(usbdev, command, status, data_in, data_out, 0); + if (ret < 0) { + dprintf(1, "Unable to configure UAS drive.\n"); + goto fail; + } + + return 0; + +fail: + usb_free_pipe(usbdev, command); + usb_free_pipe(usbdev, status); + usb_free_pipe(usbdev, data_in); + usb_free_pipe(usbdev, data_out); + return -1; +} |