SeaBIOS February 2012

seabios@seabios.org

27 participants
67 discussions

by Ian Campbell

On Mon, 2012-02-20 at 09:22 +0000, Roger Pau Monné wrote: > Hello, > > When compiling SeaBIOS with busybox and uclibc 0.9.33, I've hit the > following error: > > Build Kconfig config file > Compiling whole program out/ccode.16.s > Compiling to assembler out/asm-offsets.s > Generating offset file out/asm-offsets.h > gen-offsets.sh: applet not found I guess this means your shell comes from busybox? > When looking into gen-offsets.sh [0] I've realized there's a strange > shebang in the script ":", is this normal? Replacing ":" with > "#!/bin/sh" solves the problem, but I don't understand why the ":" > shebang works for some (on Debian stable it works ok) and what it > means. I've no idea either -- I've copied the seabios ML. Ian. > > Thanks, Roger. > > [0] http://code.coreboot.org/p/seabios/source/tree/rel-1.6.3.1/tools/gen-offset…

9 years

Coreboot, Geode LX and VGA

by Christian Gmeiner

Hi all, I am trying my luck with coreboot and seabios to get VGA working on an LX800 platform. At the moment I am not sure what options I need to enable in coreboot and seabios to enable VGA. Coreboot does its jobs and starts SeaBIOS, but VGA seems not to work. thanks for every hint -- Christian Gmeiner, MSc

9 years

[PATCH] Register drives directly in scsi_init_drive().

by Kevin O'Connor

The scsi_init_drive() function has enough information to directly register the drive there, so do the registration there. This simplifies the calling code. Signed-off-by: Kevin O'Connor <kevin(a)koconnor.net> --- Paulo - this patch will conflict with your patch, but it seems like it would also be a simplification for virtio-scsi. --- src/blockcmd.c | 25 +++++++++++++++---------- src/blockcmd.h | 2 +- src/usb-msc.c | 40 ++-------------------------------------- 3 files changed, 18 insertions(+), 49 deletions(-) diff --git a/src/blockcmd.c b/src/blockcmd.c index 3476cfc..dd35501 100644 --- a/src/blockcmd.c +++ b/src/blockcmd.c @@ -75,9 +75,9 @@ scsi_is_ready(struct disk_op_s *op) return 0; } -// Validate drive and find block size and sector count. +// Validate drive, find block size / sector count, and register drive. int -scsi_init_drive(struct drive_s *drive, const char *s, int *pdt, char **desc) +scsi_init_drive(struct drive_s *drive, const char *s, int prio) { if (!CONFIG_USB_MSC) return 0; @@ -97,18 +97,19 @@ scsi_init_drive(struct drive_s *drive, const char *s, int *pdt, char **desc) nullTrailingSpace(product); strtcpy(rev, data.rev, sizeof(rev)); nullTrailingSpace(rev); - *pdt = data.pdt & 0x1f; + int pdt = data.pdt & 0x1f; int removable = !!(data.removable & 0x80); dprintf(1, "%s vendor='%s' product='%s' rev='%s' type=%d removable=%d\n" - , s, vendor, product, rev, *pdt, removable); + , s, vendor, product, rev, pdt, removable); drive->removable = removable; - if (*pdt == SCSI_TYPE_CDROM) { + if (pdt == SCSI_TYPE_CDROM) { drive->blksize = CDROM_SECTOR_SIZE; drive->sectors = (u64)-1; - *desc = znprintf(MAXDESCSIZE, "DVD/CD [%s Drive %s %s %s]" + char *desc = znprintf(MAXDESCSIZE, "DVD/CD [%s Drive %s %s %s]" , s, vendor, product, rev); + boot_add_cd(drive, desc, prio); return 0; } @@ -127,6 +128,10 @@ scsi_init_drive(struct drive_s *drive, const char *s, int *pdt, char **desc) // We do not bother with READ CAPACITY(16) because BIOS does not support // 64-bit LBA anyway. drive->blksize = ntohl(capdata.blksize); + if (drive->blksize != DISK_SECTOR_SIZE) { + dprintf(1, "%s: unsupported block size %d\n", s, drive->blksize); + return -1; + } drive->sectors = (u64)ntohl(capdata.sectors) + 1; dprintf(1, "%s blksize=%d sectors=%d\n" , s, drive->blksize, (unsigned)drive->sectors); @@ -143,13 +148,13 @@ scsi_init_drive(struct drive_s *drive, const char *s, int *pdt, char **desc) ((u32)drive->sectors % (geomdata.heads * cylinders) == 0)) { drive->pchs.cylinders = cylinders; drive->pchs.heads = geomdata.heads; - drive->pchs.spt = (u32)drive->sectors - / (geomdata.heads * cylinders); + drive->pchs.spt = (u32)drive->sectors / (geomdata.heads * cylinders); } } - *desc = znprintf(MAXDESCSIZE, "%s Drive %s %s %s" - , s, vendor, product, rev); + char *desc = znprintf(MAXDESCSIZE, "%s Drive %s %s %s" + , s, vendor, product, rev); + boot_add_hd(drive, desc, prio); return 0; } diff --git a/src/blockcmd.h b/src/blockcmd.h index bace649..ccfeeaf 100644 --- a/src/blockcmd.h +++ b/src/blockcmd.h @@ -110,6 +110,6 @@ int cdb_read(struct disk_op_s *op); int cdb_write(struct disk_op_s *op); int scsi_is_ready(struct disk_op_s *op); -int scsi_init_drive(struct drive_s *drive, const char *s, int *pdt, char **desc); +int scsi_init_drive(struct drive_s *drive, const char *s, int prio); #endif // blockcmd.h diff --git a/src/usb-msc.c b/src/usb-msc.c index 4a09972..ef9f440 100644 --- a/src/usb-msc.c +++ b/src/usb-msc.c @@ -122,33 +122,6 @@ fail: * Setup ****************************************************************/ -static int -setup_drive_cdrom(struct drive_s *drive, char *desc) -{ - drive->sectors = (u64)-1; - struct usb_pipe *pipe = container_of( - drive, struct usbdrive_s, drive)->bulkout; - int prio = bootprio_find_usb(pipe->cntl->pci, pipe->path); - boot_add_cd(drive, desc, prio); - return 0; -} - -static int -setup_drive_hd(struct drive_s *drive, char *desc) -{ - if (drive->blksize != DISK_SECTOR_SIZE) { - dprintf(1, "Unsupported USB MSC block size %d\n", drive->blksize); - return -1; - } - - // Register with bcv system. - struct usb_pipe *pipe = container_of( - drive, struct usbdrive_s, drive)->bulkout; - int prio = bootprio_find_usb(pipe->cntl->pci, pipe->path); - boot_add_hd(drive, desc, prio); - return 0; -} - // Configure a usb msc device. int usb_msc_init(struct usb_pipe *pipe @@ -188,17 +161,8 @@ usb_msc_init(struct usb_pipe *pipe if (!udrive_g->bulkin || !udrive_g->bulkout) goto fail; - int ret, pdt; - char *desc = NULL; - ret = scsi_init_drive(&udrive_g->drive, "USB MSC", &pdt, &desc); - if (ret) - goto fail; - - if (pdt == SCSI_TYPE_CDROM) - ret = setup_drive_cdrom(&udrive_g->drive, desc); - else - ret = setup_drive_hd(&udrive_g->drive, desc); - + int prio = bootprio_find_usb(pipe->cntl->pci, pipe->path); + int ret = scsi_init_drive(&udrive_g->drive, "USB MSC", prio); if (ret) goto fail; -- 1.7.6.5

9 years

[PATCH] Running vgabios during resume from S3 on QEMU by default

by Gleb Natapov

Run vgabios during resume from S3 by default on QEMU. QEMU still able to modify SeaBIOS behavior if it wishes so by providing etc/s3-resume-vga-init file. With QEMU emulated vga cards this behaviour is desirable otherwise console becomes unusable with Linux guests after resume. Since we control vgabios source we can be sure that running it on resume from S3 is safe. Signed-off-by: Gleb Natapov <gleb(a)redhat.com> --- Older versions of SeaBIOS had a runtime configure option (disabled by default) to enable this behaviour and RHEL always enabled it, so this code path is well tested. But QEMU upstream always compiled SeaBIOS with default options and hence this patch will modify upstream behaviour. Are there any objections to this change from QEMU side? diff --git a/src/optionroms.c b/src/optionroms.c index 27cfffd..06db1c1 100644 --- a/src/optionroms.c +++ b/src/optionroms.c @@ -423,7 +423,7 @@ vga_setup(void) // Load some config settings that impact VGA. EnforceChecksum = romfile_loadint("etc/optionroms-checksum", 1); - S3ResumeVgaInit = romfile_loadint("etc/s3-resume-vga-init", 0); + S3ResumeVgaInit = romfile_loadint("etc/s3-resume-vga-init", !CONFIG_COREBOOT); ScreenAndDebug = romfile_loadint("etc/screen-and-debug", 1); if (CONFIG_OPTIONROMS_DEPLOYED) { -- Gleb.

9 years

[PATCH] cleanup process_usb_op() / process_scsi_op() declarations

by Laszlo Ersek

Commit 1e749c85 removed the definition of process_usb_op(); let's remove the declaration too. The same commit added process_scsi_op(). The function has no declaration that is also not a definition, and its only call site is in the same file as the definition. Give the function internal linkage. Build tested. Signed-off-by: Laszlo Ersek <lersek(a)redhat.com> --- Please keep me CC'd, I'm not subscribed. Thanks. src/block.c | 2 +- src/usb-msc.h | 1 - 2 files changed, 1 insertions(+), 2 deletions(-) diff --git a/src/block.c b/src/block.c index eeebd83..ccf4ee6 100644 --- a/src/block.c +++ b/src/block.c @@ -276,7 +276,7 @@ map_floppy_drive(struct drive_s *drive_g) * 16bit calling interface ****************************************************************/ -int +static int process_scsi_op(struct disk_op_s *op) { if (!CONFIG_USB_MSC) diff --git a/src/usb-msc.h b/src/usb-msc.h index a8686a3..12d749c 100644 --- a/src/usb-msc.h +++ b/src/usb-msc.h @@ -8,7 +8,6 @@ struct usb_interface_descriptor; struct usb_pipe; int usb_msc_init(struct usb_pipe *pipe , struct usb_interface_descriptor *iface, int imax); -int process_usb_op(struct disk_op_s *op); /**************************************************************** -- 1.7.1

9 years

Re: [SeaBIOS] Debug Symbols?

by Kevin O'Connor

On Fri, Feb 17, 2012 at 03:42:20PM -0700, Steve Goodrich wrote: > I'm trying to debug SeaBIOS (built into coreboot) with GDB. Would someone > point me to information on how I would generate debug symbols for SeaBIOS? The out/rom.o file has debugging symbols for the 32bit code. The out/rom16.o has the 16bit code debugging symbols. -Kevin

9 years

Re: [SeaBIOS] Also... bootorder syntax?

by Kevin O'Connor

On Fri, Feb 17, 2012 at 03:59:04PM -0700, Steve Goodrich wrote: > One other question if you're able to help: Where can I find documentation on > the syntax of entries in the bootorder file? I need to add them for my > platform, but I'm a bit confused as to how they're constructed. I'm > googling, but I've not found a description of the syntax. There is a description at: http://www.coreboot.org/SeaBIOS#Configuring_boot_order -Kevin

9 years

SeaBIOS and Bochs?

by Bernd Blaauw

I'm stuck with a few questions about applying SeaBIOS to Bochs (Windows), hoping someone is willing to give out some helpful hints. 1) Can the downloadable v1.6.3 binary directly be used in Bochs, or is a recompile needed? Thought I read some docs about MTRR config options. 2) What minimal system requirements does SeaBIOS put on a virtual machine? 80586, 2MB, PCI ? 80386, 1MB, ISA ? 3) Is there an opensource BIOS, usable in Bochs and QEMU, that does work with only 1MB RAM assigned to the VM? SeaBIOS fails this. As much as I like VMware, and QEMU (including SeaBIOS) as well, evaluation of all the 22 criteria for my goal (see [1]) resulted selecting Bochs as least bad emulation/virtualisation/simulation solution. Hopefully QEMU can match these criteria someday. with best regards, Bernd Blaauw [1] : [ http://sourceforge.net/mailarchive/message.php?msg_id=28786659 ]

9 years

[PATCH v2] add virtio-scsi driver

by Paolo Bonzini

virtio-scsi is a simple HBA that talks to the host via a single vring. The implementation looks like a hybrid of usb-msc and virtio-blk. Signed-off-by: Paolo Bonzini <pbonzini(a)redhat.com> --- Makefile | 2 +- src/Kconfig | 6 ++ src/block.c | 3 +- src/blockcmd.c | 5 +- src/boot.c | 14 ++++ src/boot.h | 1 + src/disk.c | 3 +- src/disk.h | 1 + src/pci_ids.h | 1 + src/post.c | 2 + src/virtio-scsi.c | 209 +++++++++++++++++++++++++++++++++++++++++++++++++++++ src/virtio-scsi.h | 47 ++++++++++++ 12 files changed, 290 insertions(+), 4 deletions(-) create mode 100644 src/virtio-scsi.c create mode 100644 src/virtio-scsi.h diff --git a/Makefile b/Makefile index 90e1bce..818d2b3 100644 --- a/Makefile +++ b/Makefile @@ -15,7 +15,7 @@ SRCBOTH=misc.c stacks.c pmm.c output.c util.c block.c floppy.c ata.c mouse.c \ kbd.c pci.c serial.c clock.c pic.c cdrom.c ps2port.c smp.c resume.c \ pnpbios.c pirtable.c vgahooks.c ramdisk.c pcibios.c blockcmd.c \ usb.c usb-uhci.c usb-ohci.c usb-ehci.c usb-hid.c usb-msc.c \ - virtio-ring.c virtio-pci.c virtio-blk.c apm.c ahci.c + virtio-ring.c virtio-pci.c virtio-blk.c virtio-scsi.c apm.c ahci.c SRC16=$(SRCBOTH) system.c disk.c font.c SRC32FLAT=$(SRCBOTH) post.c shadow.c memmap.c coreboot.c boot.c \ acpi.c smm.c mptable.c smbios.c pciinit.c optionroms.c mtrr.c \ diff --git a/src/Kconfig b/src/Kconfig index 250663a..53fda9b 100644 --- a/src/Kconfig +++ b/src/Kconfig @@ -113,6 +113,12 @@ menu "Hardware support" default y help Support boot from virtio-blk storage. + config VIRTIO_SCSI + depends on DRIVES && !COREBOOT + bool "virtio-scsi controllers" + default y + help + Support boot from virtio-scsi storage. config FLOPPY depends on DRIVES bool "Floppy controller" diff --git a/src/block.c b/src/block.c index eeebd83..e607d67 100644 --- a/src/block.c +++ b/src/block.c @@ -279,7 +279,7 @@ map_floppy_drive(struct drive_s *drive_g) int process_scsi_op(struct disk_op_s *op) { - if (!CONFIG_USB_MSC) + if (!CONFIG_VIRTIO_SCSI && !CONFIG_USB_MSC) return 0; switch (op->command) { case CMD_READ: @@ -320,6 +320,7 @@ process_op(struct disk_op_s *op) case DTYPE_AHCI: return process_ahci_op(op); case DTYPE_USB: + case DTYPE_VIRTIO_SCSI: return process_scsi_op(op); default: op->count = 0; diff --git a/src/blockcmd.c b/src/blockcmd.c index 3476cfc..b2a8d71 100644 --- a/src/blockcmd.c +++ b/src/blockcmd.c @@ -12,6 +12,7 @@ #include "ata.h" // atapi_cmd_data #include "ahci.h" // atapi_cmd_data #include "usb-msc.h" // usb_cmd_data +#include "virtio-scsi.h" // virtio_scsi_cmd_data // Route command to low-level handler. static int @@ -25,6 +26,8 @@ cdb_cmd_data(struct disk_op_s *op, void *cdbcmd, u16 blocksize) return usb_cmd_data(op, cdbcmd, blocksize); case DTYPE_AHCI: return ahci_cmd_data(op, cdbcmd, blocksize); + case DTYPE_VIRTIO_SCSI: + return virtio_scsi_cmd_data(op, cdbcmd, blocksize); default: op->count = 0; return DISK_RET_EPARAM; @@ -79,7 +82,7 @@ scsi_is_ready(struct disk_op_s *op) int scsi_init_drive(struct drive_s *drive, const char *s, int *pdt, char **desc) { - if (!CONFIG_USB_MSC) + if (!CONFIG_USB_MSC && !CONFIG_VIRTIO_SCSI) return 0; struct disk_op_s dop; diff --git a/src/boot.c b/src/boot.c index e26dad1..c737ba4 100644 --- a/src/boot.c +++ b/src/boot.c @@ -128,6 +128,20 @@ int bootprio_find_pci_device(struct pci_device *pci) return find_prio(desc); } +int bootprio_find_scsi_device(struct pci_device *pci, int target, int lun) +{ + if (!CONFIG_BOOTORDER) + return -1; + if (!pci) + // support only pci machine for now + return -1; + // Find scsi drive - for example: /pci@i0cf8/scsi@5/channel@0/disk@1,0 + char desc[256], *p; + p = build_pci_path(desc, sizeof(desc), "*", pci); + snprintf(p, desc+sizeof(desc)-p, "/*@0/*@%d,%d", target, lun); + return find_prio(desc); +} + int bootprio_find_ata_device(struct pci_device *pci, int chanid, int slave) { if (!CONFIG_BOOTORDER) diff --git a/src/boot.h b/src/boot.h index d776aa1..686f04d 100644 --- a/src/boot.h +++ b/src/boot.h @@ -14,6 +14,7 @@ void boot_add_cbfs(void *data, const char *desc, int prio); void boot_prep(void); struct pci_device; int bootprio_find_pci_device(struct pci_device *pci); +int bootprio_find_scsi_device(struct pci_device *pci, int target, int lun); int bootprio_find_ata_device(struct pci_device *pci, int chanid, int slave); int bootprio_find_fdc_device(struct pci_device *pci, int port, int fdid); int bootprio_find_pci_rom(struct pci_device *pci, int instance); diff --git a/src/disk.c b/src/disk.c index a124a0f..2812e47 100644 --- a/src/disk.c +++ b/src/disk.c @@ -550,7 +550,8 @@ disk_1348(struct bregs *regs, struct drive_s *drive_g) SET_INT13DPT(regs, blksize, blksize); if (size < 30 || - (type != DTYPE_ATA && type != DTYPE_ATAPI && type != DTYPE_VIRTIO_BLK)) { + (type != DTYPE_ATA && type != DTYPE_ATAPI && + type != DTYPE_VIRTIO_BLK && type != DTYPE_VIRTIO_SCSI)) { disk_ret(regs, DISK_RET_SUCCESS); return; } diff --git a/src/disk.h b/src/disk.h index dd7c46a..d344399 100644 --- a/src/disk.h +++ b/src/disk.h @@ -207,6 +207,7 @@ struct drive_s { #define DTYPE_USB 0x06 #define DTYPE_VIRTIO_BLK 0x07 #define DTYPE_AHCI 0x08 +#define DTYPE_VIRTIO_SCSI 0x09 #define MAXDESCSIZE 80 diff --git a/src/pci_ids.h b/src/pci_ids.h index e1cded2..4b59585 100644 --- a/src/pci_ids.h +++ b/src/pci_ids.h @@ -2608,3 +2608,4 @@ #define PCI_VENDOR_ID_REDHAT_QUMRANET 0x1af4 #define PCI_DEVICE_ID_VIRTIO_BLK 0x1001 +#define PCI_DEVICE_ID_VIRTIO_SCSI 0x1004 diff --git a/src/post.c b/src/post.c index b4ad1fa..d7bbcdd 100644 --- a/src/post.c +++ b/src/post.c @@ -26,6 +26,7 @@ #include "xen.h" // xen_probe_hvm_info #include "ps2port.h" // ps2port_setup #include "virtio-blk.h" // virtio_blk_setup +#include "virtio-scsi.h" // virtio_scsi_setup /**************************************************************** @@ -190,6 +191,7 @@ init_hw(void) cbfs_payload_setup(); ramdisk_setup(); virtio_blk_setup(); + virtio_scsi_setup(); } // Begin the boot process by invoking an int0x19 in 16bit mode. diff --git a/src/virtio-scsi.c b/src/virtio-scsi.c new file mode 100644 index 0000000..4a39d60 --- /dev/null +++ b/src/virtio-scsi.c @@ -0,0 +1,209 @@ +// Virtio SCSI boot support. +// +// Copyright (C) 2011 Red Hat Inc. +// +// Authors: +// Paolo Bonzini <pbonzini(a)redhat.com> +// +// This file may be distributed under the terms of the GNU LGPLv3 license. + +#include "util.h" // dprintf +#include "pci.h" // foreachpci +#include "config.h" // CONFIG_* +#include "biosvar.h" // GET_GLOBAL +#include "pci_ids.h" // PCI_DEVICE_ID_VIRTIO_BLK +#include "pci_regs.h" // PCI_VENDOR_ID +#include "boot.h" // boot_add_hd +#include "virtio-pci.h" +#include "virtio-ring.h" +#include "virtio-scsi.h" +#include "disk.h" + +struct virtio_lun_s { + struct drive_s drive; + struct pci_device *pci; + struct vring_virtqueue *vq; + u16 ioaddr; + u16 target; + u16 lun; +}; + +static int +virtio_scsi_cmd(u16 ioaddr, struct vring_virtqueue *vq, struct disk_op_s *op, + void *cdbcmd, u16 target, u16 lun, u32 len) +{ + struct virtio_scsi_req_cmd req; + struct virtio_scsi_resp_cmd resp; + struct vring_list sg[3]; + + memset(&req, 0, sizeof(req)); + req.lun[0] = 1; + req.lun[1] = target; + req.lun[2] = (lun >> 8) | 0x40; + req.lun[3] = (lun & 0xff); + memcpy(req.cdb, cdbcmd, 16); + + int datain = (req.cdb[0] != CDB_CMD_WRITE_10); + int data_idx = (datain ? 2 : 1); + int out_num = (datain ? 1 : 2); + int in_num = (len ? 3 : 2) - out_num; + + sg[0].addr = MAKE_FLATPTR(GET_SEG(SS), &req); + sg[0].length = sizeof(req); + + sg[out_num].addr = MAKE_FLATPTR(GET_SEG(SS), &resp); + sg[out_num].length = sizeof(resp); + + sg[data_idx].addr = op->buf_fl; + sg[data_idx].length = len; + + /* Add to virtqueue and kick host */ + vring_add_buf(vq, sg, out_num, in_num, 0, 0); + vring_kick(ioaddr, vq, 1); + + /* Wait for reply */ + while (!vring_more_used(vq)) + usleep(5); + + /* Reclaim virtqueue element */ + vring_get_buf(vq, NULL); + + /* Clear interrupt status register. Avoid leaving interrupts stuck if + * VRING_AVAIL_F_NO_INTERRUPT was ignored and interrupts were raised. + */ + vp_get_isr(ioaddr); + + if (resp.response == VIRTIO_SCSI_S_OK && resp.status == 0) { + return DISK_RET_SUCCESS; + } + return DISK_RET_EBADTRACK; +} + +int +virtio_scsi_cmd_data(struct disk_op_s *op, void *cdbcmd, u16 blocksize) +{ + struct virtio_lun_s *vlun = + container_of(op->drive_g, struct virtio_lun_s, drive); + + return virtio_scsi_cmd(GET_GLOBAL(vlun->ioaddr), + GET_GLOBAL(vlun->vq), op, cdbcmd, + GET_GLOBAL(vlun->target), GET_GLOBAL(vlun->lun), + blocksize * op->count); +} + +static int +setup_lun_cdrom(struct virtio_lun_s *vlun, char *desc) +{ + int prio = bootprio_find_scsi_device(vlun->pci, vlun->target, vlun->lun); + boot_add_cd(&vlun->drive, desc, prio); + return 0; +} + +static int +setup_lun_hd(struct virtio_lun_s *vlun, char *desc) +{ + if (vlun->drive.blksize != DISK_SECTOR_SIZE) { + dprintf(1, "Unsupported block size %d\n", vlun->drive.blksize); + return -1; + } + + // Register with bcv system. + int prio = bootprio_find_scsi_device(vlun->pci, vlun->target, vlun->lun); + boot_add_hd(&vlun->drive, desc, prio); + + return 0; +} + +static int +virtio_scsi_add_lun(struct pci_device *pci, u16 ioaddr, + struct vring_virtqueue *vq, u16 target, u16 lun) +{ + struct virtio_lun_s *vlun = malloc_fseg(sizeof(*vlun)); + if (!vlun) { + warn_noalloc(); + return -1; + } + memset(vlun, 0, sizeof(*vlun)); + vlun->drive.type = DTYPE_VIRTIO_SCSI; + vlun->drive.cntl_id = pci->bdf; + vlun->pci = pci; + vlun->ioaddr = ioaddr; + vlun->vq = vq; + vlun->target = target; + vlun->lun = lun; + + int pdt, ret; + char *desc = NULL; + ret = scsi_init_drive(&vlun->drive, "virtio-scsi", &pdt, &desc); + if (ret) + goto fail; + + if (pdt == SCSI_TYPE_CDROM) + ret = setup_lun_cdrom(vlun, desc); + else + ret = setup_lun_hd(vlun, desc); + if (ret) + goto fail; + return ret; + +fail: + free(desc); + free(vlun); + return -1; +} + +static int +virtio_scsi_scan_target(struct pci_device *pci, u16 ioaddr, + struct vring_virtqueue *vq, u16 target) +{ + /* TODO: send REPORT LUNS. For now, only LUN 0 is recognized. */ + int ret = virtio_scsi_add_lun(pci, ioaddr, vq, target, 0); + return ret < 0 ? 0 : 1; +} + +static void +init_virtio_scsi(struct pci_device *pci) +{ + u16 bdf = pci->bdf; + dprintf(1, "found virtio-scsi at %x:%x\n", pci_bdf_to_bus(bdf), + pci_bdf_to_dev(bdf)); + struct vring_virtqueue *vq = NULL; + u16 ioaddr = vp_init_simple(bdf); + if (vp_find_vq(ioaddr, 2, &vq) < 0 ) { + dprintf(1, "fail to find vq for virtio-scsi %x:%x\n", + pci_bdf_to_bus(bdf), pci_bdf_to_dev(bdf)); + goto fail; + } + + int i, tot; + for (tot = 0, i = 0; i < 256; i++) + tot += virtio_scsi_scan_target(pci, ioaddr, vq, i); + + if (!tot) + goto fail; + + vp_set_status(ioaddr, VIRTIO_CONFIG_S_ACKNOWLEDGE | + VIRTIO_CONFIG_S_DRIVER | VIRTIO_CONFIG_S_DRIVER_OK); + return; + +fail: + free(vq); +} + +void +virtio_scsi_setup(void) +{ + ASSERT32FLAT(); + if (! CONFIG_VIRTIO_SCSI || CONFIG_COREBOOT) + return; + + dprintf(3, "init virtio-scsi\n"); + + struct pci_device *pci; + foreachpci(pci) { + if (pci->vendor != PCI_VENDOR_ID_REDHAT_QUMRANET + || pci->device != PCI_DEVICE_ID_VIRTIO_SCSI) + continue; + init_virtio_scsi(pci); + } +} diff --git a/src/virtio-scsi.h b/src/virtio-scsi.h new file mode 100644 index 0000000..bbfbf30 --- /dev/null +++ b/src/virtio-scsi.h @@ -0,0 +1,47 @@ +#ifndef _VIRTIO_SCSI_H +#define _VIRTIO_SCSI_H + +#define VIRTIO_SCSI_CDB_SIZE 32 +#define VIRTIO_SCSI_SENSE_SIZE 96 + +struct virtio_scsi_config +{ + u32 num_queues; + u32 seg_max; + u32 max_sectors; + u32 cmd_per_lun; + u32 event_info_size; + u32 sense_size; + u32 cdb_size; + u16 max_channel; + u16 max_target; + u32 max_lun; +} __attribute__((packed)); + +/* This is the first element of the "out" scatter-gather list. */ +struct virtio_scsi_req_cmd { + u8 lun[8]; + u64 id; + u8 task_attr; + u8 prio; + u8 crn; + char cdb[VIRTIO_SCSI_CDB_SIZE]; +}; + +/* This is the first element of the "in" scatter-gather list. */ +struct virtio_scsi_resp_cmd { + u32 sense_len; + u32 residual; + u16 status_qualifier; + u8 status; + u8 response; + u8 sense[VIRTIO_SCSI_SENSE_SIZE]; +}; + +#define VIRTIO_SCSI_S_OK 0 + +struct disk_op_s; +int virtio_scsi_cmd_data(struct disk_op_s *op, void *cdbcmd, u16 blocksize); +void virtio_scsi_setup(void); + +#endif /* _VIRTIO_SCSI_H */ -- 1.7.7.6

9 years

[PATCH] add virtio-scsi driver

by Paolo Bonzini

virtio-scsi is a simple HBA that talks to the host via a single vring. The implementation looks like a hybrid of usb-msc and virtio-blk. Signed-off-by: Paolo Bonzini <pbonzini(a)redhat.com> --- Makefile | 2 +- src/Kconfig | 6 ++ src/block.c | 3 +- src/blockcmd.c | 5 +- src/boot.c | 14 ++++ src/boot.h | 1 + src/disk.c | 3 +- src/disk.h | 1 + src/pci_ids.h | 1 + src/post.c | 2 + src/virtio-scsi.c | 209 +++++++++++++++++++++++++++++++++++++++++++++++++++++ src/virtio-scsi.h | 42 +++++++++++ 12 files changed, 285 insertions(+), 4 deletions(-) create mode 100644 src/virtio-scsi.c create mode 100644 src/virtio-scsi.h diff --git a/Makefile b/Makefile index 90e1bce..818d2b3 100644 --- a/Makefile +++ b/Makefile @@ -15,7 +15,7 @@ SRCBOTH=misc.c stacks.c pmm.c output.c util.c block.c floppy.c ata.c mouse.c \ kbd.c pci.c serial.c clock.c pic.c cdrom.c ps2port.c smp.c resume.c \ pnpbios.c pirtable.c vgahooks.c ramdisk.c pcibios.c blockcmd.c \ usb.c usb-uhci.c usb-ohci.c usb-ehci.c usb-hid.c usb-msc.c \ - virtio-ring.c virtio-pci.c virtio-blk.c apm.c ahci.c + virtio-ring.c virtio-pci.c virtio-blk.c virtio-scsi.c apm.c ahci.c SRC16=$(SRCBOTH) system.c disk.c font.c SRC32FLAT=$(SRCBOTH) post.c shadow.c memmap.c coreboot.c boot.c \ acpi.c smm.c mptable.c smbios.c pciinit.c optionroms.c mtrr.c \ diff --git a/src/Kconfig b/src/Kconfig index 250663a..53fda9b 100644 --- a/src/Kconfig +++ b/src/Kconfig @@ -113,6 +113,12 @@ menu "Hardware support" default y help Support boot from virtio-blk storage. + config VIRTIO_SCSI + depends on DRIVES && !COREBOOT + bool "virtio-scsi controllers" + default y + help + Support boot from virtio-scsi storage. config FLOPPY depends on DRIVES bool "Floppy controller" diff --git a/src/block.c b/src/block.c index eeebd83..e607d67 100644 --- a/src/block.c +++ b/src/block.c @@ -279,7 +279,7 @@ map_floppy_drive(struct drive_s *drive_g) int process_scsi_op(struct disk_op_s *op) { - if (!CONFIG_USB_MSC) + if (!CONFIG_VIRTIO_SCSI && !CONFIG_USB_MSC) return 0; switch (op->command) { case CMD_READ: @@ -320,6 +320,7 @@ process_op(struct disk_op_s *op) case DTYPE_AHCI: return process_ahci_op(op); case DTYPE_USB: + case DTYPE_VIRTIO_SCSI: return process_scsi_op(op); default: op->count = 0; diff --git a/src/blockcmd.c b/src/blockcmd.c index 3476cfc..b2a8d71 100644 --- a/src/blockcmd.c +++ b/src/blockcmd.c @@ -12,6 +12,7 @@ #include "ata.h" // atapi_cmd_data #include "ahci.h" // atapi_cmd_data #include "usb-msc.h" // usb_cmd_data +#include "virtio-scsi.h" // virtio_scsi_cmd_data // Route command to low-level handler. static int @@ -25,6 +26,8 @@ cdb_cmd_data(struct disk_op_s *op, void *cdbcmd, u16 blocksize) return usb_cmd_data(op, cdbcmd, blocksize); case DTYPE_AHCI: return ahci_cmd_data(op, cdbcmd, blocksize); + case DTYPE_VIRTIO_SCSI: + return virtio_scsi_cmd_data(op, cdbcmd, blocksize); default: op->count = 0; return DISK_RET_EPARAM; @@ -79,7 +82,7 @@ scsi_is_ready(struct disk_op_s *op) int scsi_init_drive(struct drive_s *drive, const char *s, int *pdt, char **desc) { - if (!CONFIG_USB_MSC) + if (!CONFIG_USB_MSC && !CONFIG_VIRTIO_SCSI) return 0; struct disk_op_s dop; diff --git a/src/boot.c b/src/boot.c index e26dad1..c737ba4 100644 --- a/src/boot.c +++ b/src/boot.c @@ -128,6 +128,20 @@ int bootprio_find_pci_device(struct pci_device *pci) return find_prio(desc); } +int bootprio_find_scsi_device(struct pci_device *pci, int target, int lun) +{ + if (!CONFIG_BOOTORDER) + return -1; + if (!pci) + // support only pci machine for now + return -1; + // Find scsi drive - for example: /pci@i0cf8/scsi@5/channel@0/disk@1,0 + char desc[256], *p; + p = build_pci_path(desc, sizeof(desc), "*", pci); + snprintf(p, desc+sizeof(desc)-p, "/*@0/*@%d,%d", target, lun); + return find_prio(desc); +} + int bootprio_find_ata_device(struct pci_device *pci, int chanid, int slave) { if (!CONFIG_BOOTORDER) diff --git a/src/boot.h b/src/boot.h index d776aa1..686f04d 100644 --- a/src/boot.h +++ b/src/boot.h @@ -14,6 +14,7 @@ void boot_add_cbfs(void *data, const char *desc, int prio); void boot_prep(void); struct pci_device; int bootprio_find_pci_device(struct pci_device *pci); +int bootprio_find_scsi_device(struct pci_device *pci, int target, int lun); int bootprio_find_ata_device(struct pci_device *pci, int chanid, int slave); int bootprio_find_fdc_device(struct pci_device *pci, int port, int fdid); int bootprio_find_pci_rom(struct pci_device *pci, int instance); diff --git a/src/disk.c b/src/disk.c index a124a0f..2812e47 100644 --- a/src/disk.c +++ b/src/disk.c @@ -550,7 +550,8 @@ disk_1348(struct bregs *regs, struct drive_s *drive_g) SET_INT13DPT(regs, blksize, blksize); if (size < 30 || - (type != DTYPE_ATA && type != DTYPE_ATAPI && type != DTYPE_VIRTIO_BLK)) { + (type != DTYPE_ATA && type != DTYPE_ATAPI && + type != DTYPE_VIRTIO_BLK && type != DTYPE_VIRTIO_SCSI)) { disk_ret(regs, DISK_RET_SUCCESS); return; } diff --git a/src/disk.h b/src/disk.h index dd7c46a..d344399 100644 --- a/src/disk.h +++ b/src/disk.h @@ -207,6 +207,7 @@ struct drive_s { #define DTYPE_USB 0x06 #define DTYPE_VIRTIO_BLK 0x07 #define DTYPE_AHCI 0x08 +#define DTYPE_VIRTIO_SCSI 0x09 #define MAXDESCSIZE 80 diff --git a/src/pci_ids.h b/src/pci_ids.h index e1cded2..4b59585 100644 --- a/src/pci_ids.h +++ b/src/pci_ids.h @@ -2608,3 +2608,4 @@ #define PCI_VENDOR_ID_REDHAT_QUMRANET 0x1af4 #define PCI_DEVICE_ID_VIRTIO_BLK 0x1001 +#define PCI_DEVICE_ID_VIRTIO_SCSI 0x1004 diff --git a/src/post.c b/src/post.c index b4ad1fa..d7bbcdd 100644 --- a/src/post.c +++ b/src/post.c @@ -26,6 +26,7 @@ #include "xen.h" // xen_probe_hvm_info #include "ps2port.h" // ps2port_setup #include "virtio-blk.h" // virtio_blk_setup +#include "virtio-scsi.h" // virtio_scsi_setup /**************************************************************** @@ -190,6 +191,7 @@ init_hw(void) cbfs_payload_setup(); ramdisk_setup(); virtio_blk_setup(); + virtio_scsi_setup(); } // Begin the boot process by invoking an int0x19 in 16bit mode. diff --git a/src/virtio-scsi.c b/src/virtio-scsi.c new file mode 100644 index 0000000..9e5b649 --- /dev/null +++ b/src/virtio-scsi.c @@ -0,0 +1,209 @@ +// Virtio SCSI boot support. +// +// Copyright (C) 2011 Red Hat Inc. +// +// Authors: +// Paolo Bonzini <pbonzini(a)redhat.com> +// +// This file may be distributed under the terms of the GNU LGPLv3 license. + +#include "util.h" // dprintf +#include "pci.h" // foreachpci +#include "config.h" // CONFIG_* +#include "biosvar.h" // GET_GLOBAL +#include "pci_ids.h" // PCI_DEVICE_ID_VIRTIO_BLK +#include "pci_regs.h" // PCI_VENDOR_ID +#include "boot.h" // boot_add_hd +#include "virtio-pci.h" +#include "virtio-ring.h" +#include "virtio-scsi.h" +#include "disk.h" + +struct virtio_lun_s { + struct drive_s drive; + struct pci_device *pci; + struct vring_virtqueue *vq; + u16 ioaddr; + u16 target; + u16 lun; +}; + +static int +virtio_scsi_cmd(u16 ioaddr, struct vring_virtqueue *vq, struct disk_op_s *op, + void *cdbcmd, u16 target, u16 lun, u32 len) +{ + struct virtio_scsi_req_cmd req; + struct virtio_scsi_resp_cmd resp; + struct vring_list sg[3]; + + memset(&req, 0, sizeof(req)); + req.lun[0] = 1; + req.lun[1] = target; + req.lun[2] = (lun >> 8) | 0x40; + req.lun[3] = (lun & 0xff); + memcpy(req.cdb, cdbcmd, 16); + + int datain = (req.cdb[0] != CDB_CMD_WRITE_10); + int data_idx = (datain ? 2 : 1); + int out_num = (datain ? 1 : 2); + int in_num = (len ? 3 : 2) - out_num; + + sg[0].addr = MAKE_FLATPTR(GET_SEG(SS), &req); + sg[0].length = sizeof(req); + + sg[out_num].addr = MAKE_FLATPTR(GET_SEG(SS), &resp); + sg[out_num].length = sizeof(resp); + + sg[data_idx].addr = op->buf_fl; + sg[data_idx].length = len; + + /* Add to virtqueue and kick host */ + vring_add_buf(vq, sg, out_num, in_num, 0, 0); + vring_kick(ioaddr, vq, 1); + + /* Wait for reply */ + while (!vring_more_used(vq)) + usleep(5); + + /* Reclaim virtqueue element */ + vring_get_buf(vq, NULL); + + /* Clear interrupt status register. Avoid leaving interrupts stuck if + * VRING_AVAIL_F_NO_INTERRUPT was ignored and interrupts were raised. + */ + vp_get_isr(ioaddr); + + if (resp.response == VIRTIO_BLK_S_OK && resp.status == 0) { + return DISK_RET_SUCCESS; + } + return DISK_RET_EBADTRACK; +} + +int +virtio_scsi_cmd_data(struct disk_op_s *op, void *cdbcmd, u16 blocksize) +{ + struct virtio_lun_s *vlun = + container_of(op->drive_g, struct virtio_lun_s, drive); + + return virtio_scsi_cmd(GET_GLOBAL(vlun->ioaddr), + GET_GLOBAL(vlun->vq), op, cdbcmd, + GET_GLOBAL(vlun->target), GET_GLOBAL(vlun->lun), + blocksize * op->count); +} + +static int +setup_lun_cdrom(struct virtio_lun_s *vlun, char *desc) +{ + int prio = bootprio_find_scsi_device(vlun->pci, vlun->target, vlun->lun); + boot_add_cd(&vlun->drive, desc, prio); + return 0; +} + +static int +setup_lun_hd(struct virtio_lun_s *vlun, char *desc) +{ + if (vlun->drive.blksize != DISK_SECTOR_SIZE) { + dprintf(1, "Unsupported block size %d\n", vlun->drive.blksize); + return -1; + } + + // Register with bcv system. + int prio = bootprio_find_scsi_device(vlun->pci, vlun->target, vlun->lun); + boot_add_hd(&vlun->drive, desc, prio); + + return 0; +} + +static int +virtio_scsi_add_lun(struct pci_device *pci, u16 ioaddr, + struct vring_virtqueue *vq, u16 target, u16 lun) +{ + struct virtio_lun_s *vlun = malloc_fseg(sizeof(*vlun)); + if (!vlun) { + warn_noalloc(); + return -1; + } + memset(vlun, 0, sizeof(*vlun)); + vlun->drive.type = DTYPE_VIRTIO_SCSI; + vlun->drive.cntl_id = pci->bdf; + vlun->pci = pci; + vlun->ioaddr = ioaddr; + vlun->vq = vq; + vlun->target = target; + vlun->lun = lun; + + int pdt, ret; + char *desc = NULL; + ret = scsi_init_drive(&vlun->drive, "virtio-scsi", &pdt, &desc); + if (ret) + goto fail; + + if (pdt == SCSI_TYPE_CDROM) + ret = setup_lun_cdrom(vlun, desc); + else + ret = setup_lun_hd(vlun, desc); + if (ret) + goto fail; + return ret; + +fail: + free(desc); + free(vlun); + return -1; +} + +static int +virtio_scsi_scan_target(struct pci_device *pci, u16 ioaddr, + struct vring_virtqueue *vq, u16 target) +{ + /* TODO: send REPORT LUNS. For now, only LUN 0 is recognized. */ + int ret = virtio_scsi_add_lun(pci, ioaddr, vq, target, 0); + return ret < 0 ? 0 : 1; +} + +static void +init_virtio_scsi(struct pci_device *pci) +{ + u16 bdf = pci->bdf; + dprintf(1, "found virtio-scsi at %x:%x\n", pci_bdf_to_bus(bdf), + pci_bdf_to_dev(bdf)); + struct vring_virtqueue *vq = NULL; + u16 ioaddr = vp_init_simple(bdf); + if (vp_find_vq(ioaddr, 2, &vq) < 0 ) { + dprintf(1, "fail to find vq for virtio-scsi %x:%x\n", + pci_bdf_to_bus(bdf), pci_bdf_to_dev(bdf)); + goto fail; + } + + int i, tot; + for (tot = 0, i = 0; i < 256; i++) + tot += virtio_scsi_scan_target(pci, ioaddr, vq, i); + + if (!tot) + goto fail; + + vp_set_status(ioaddr, VIRTIO_CONFIG_S_ACKNOWLEDGE | + VIRTIO_CONFIG_S_DRIVER | VIRTIO_CONFIG_S_DRIVER_OK); + return; + +fail: + free(vq); +} + +void +virtio_scsi_setup(void) +{ + ASSERT32FLAT(); + if (! CONFIG_VIRTIO_SCSI || CONFIG_COREBOOT) + return; + + dprintf(3, "init virtio-scsi\n"); + + struct pci_device *pci; + foreachpci(pci) { + if (pci->vendor != PCI_VENDOR_ID_REDHAT_QUMRANET + || pci->device != PCI_DEVICE_ID_VIRTIO_SCSI) + continue; + init_virtio_scsi(pci); + } +} diff --git a/src/virtio-scsi.h b/src/virtio-scsi.h new file mode 100644 index 0000000..08a59a2 --- /dev/null +++ b/src/virtio-scsi.h @@ -0,0 +1,42 @@ +#ifndef _VIRTIO_SCSI_H +#define _VIRTIO_SCSI_H + +#define VIRTIO_SCSI_CDB_SIZE 32 +#define VIRTIO_SCSI_SENSE_SIZE 96 + +struct virtio_scsi_config +{ + u32 num_queues; + u32 seg_max; + u32 event_info_size; + u32 sense_size; + u32 cdb_size; +} __attribute__((packed)); + +/* This is the first element of the "out" scatter-gather list. */ +struct virtio_scsi_req_cmd { + u8 lun[8]; + u64 id; + u8 task_attr; + u8 prio; + u8 crn; + char cdb[VIRTIO_SCSI_CDB_SIZE]; +}; + +/* This is the first element of the "in" scatter-gather list. */ +struct virtio_scsi_resp_cmd { + u32 sense_len; + u32 residual; + u16 status_qualifier; + u8 status; + u8 response; + u8 sense[VIRTIO_SCSI_SENSE_SIZE]; +}; + +#define VIRTIO_SCSI_S_OK 0 + +struct disk_op_s; +int virtio_scsi_cmd_data(struct disk_op_s *op, void *cdbcmd, u16 blocksize); +void virtio_scsi_setup(void); + +#endif /* _VIRTIO_SCSI_H */ -- 1.7.7.6

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SeaBIOS February 2012