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2017-07-14pc-bios/s390-ccw: Add code for virtio feature negotiationThomas Huth
The upcoming virtio-net driver needs to negotiate some features, so we need the possibility to do this in the core virtio code. Reviewed-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Thomas Huth <thuth@redhat.com> Message-Id: <1499863793-18627-8-git-send-email-thuth@redhat.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2017-07-14pc-bios/s390-ccw: Move virtio-block related functions into a separate fileThomas Huth
The netboot code is going to link against the code from virtio.c, too, so we've got to move the virtio-block and -scsi related code out of the way. Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Thomas Huth <thuth@redhat.com> Message-Id: <1499863793-18627-4-git-send-email-thuth@redhat.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2017-07-14pc-bios/s390-ccw: Move libc functions to separate headerThomas Huth
The upcoming netboot code will use the libc from SLOF. To be able to still use s390-ccw.h there, the libc related functions in this header have to be moved to a different location. And while we're at it, remove the duplicate memcpy() function from sclp.c. Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Thomas Huth <thuth@redhat.com> Message-Id: <1499863793-18627-2-git-send-email-thuth@redhat.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2017-05-19pc-bios/s390-ccw: Break up virtio-scsi read into multiplesEric Farman
A virtio-scsi request that goes through the host sd driver and exceeds the maximum transfer size is automatically broken up for us. But the equivalent request going to the sg driver presumes that any length requirements have already been honored. Let's use the max_sectors field on the virtio-scsi controller device, and break up all requests (both sd and sg) to avoid this problem. Signed-off-by: Eric Farman <farman@linux.vnet.ibm.com> Message-Id: <20170510155359.32727-4-farman@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2017-05-02pc-bios/s390-ccw: provide a function to interpret LOADPARM valueFarhan Ali
The LOADPARM value is fetched from SCP Read Info, but it's applied only at the phase of bootmap interpretation. So let's read the LOARPARM value and store it. Also provide a parsing function to detect numbers in the LOADPARM which can be used during bootmap interpretation. Remove a stray whitespace. Initial patch from Eugene (jno) Dvurechenski. Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com> Signed-off-by: Farhan Ali <alifm@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2017-05-02pc-bios/s390-ccw: get LOADPARM stored in SCP Read InfoFarhan Ali
Obtain the loadparm value stored in SCP Read Info by performing a SCLP Read Info request. Rename sclp-ascii.c to sclp.c to reflect the changed scope of the file. Signed-off-by: Farhan Ali <alifm@linux.vnet.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2017-05-02pc-bios/s390-ccw: Make ebcdic/ascii conversion publicEugene (jno) Dvurechenski
Make the ebcdic_to_ascii function public to the rest of the "bios" code, as the volume label is no more the single thing to be converted. Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com> Signed-off-by: Farhan Ali <alifm@linux.vnet.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2016-05-17pc-bios/s390-ccw: Get device address via diag 308/6Alexander Yarygin
To IPL from a device, pc-bios receives from qemu a device address via general register 7. The better way to do it is to use diag308/6 instruction which returns so called "IplParameterBlock". IplParameterBlock contains the device address for IPL and additional parameters that can be used by pc-bios. This patch allows pc-bios to get device address via diag308/6 and doesn't use gr7 passed boot information anymore. Signed-off-by: Alexander Yarygin <yarygin@linux.vnet.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2016-03-23pc-bios/s390-ccw: make provisions for different backendsEugene (jno) Dvurechenski
Add dispatching code to make room for non virtio-blk boot devices. Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2016-03-23pc-bios/s390-ccw: update virtio implementation to allow up to 3 vringsEugene (jno) Dvurechenski
Add ability to work with up to 3 vrings, which is required for virtio-scsi implementation. Implement the optional cookie to speed up processing of virtio notifications. Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2016-03-23pc-bios/s390-ccw: qemuize typesEugene (jno) Dvurechenski
Turn [the most of] existing declarations from struct type_name { ... }; into struct TypeName { ... }; typedef struct TypeName TypeName; and make use of them. Also switch u{8,16,32,64} to uint{8,16,32,64}_t. Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2016-03-23pc-bios/s390-ccw: add utility functions and "export" some othersEugene (jno) Dvurechenski
Add several utility functions, make IPL_check and IPL_assert generally available, etc. Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2016-03-23pc-bios/s390-ccw: virtio_panic -> panicEugene (jno) Dvurechenski
This function has nothing to do with virtio. Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2015-06-30s390-ccw.img: Consume service interruptsChristian Borntraeger
We have to consume the outstanding service interrupt after each service call, otherwise a correct implementation will return CC=2 on subsequent service calls. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2015-03-10s390-ccw.img: Allow bigger ramdisk sizes or offsetsChristian Borntraeger
The s390-ccw bios creates the the virtqueue at 100MB. For big ramdisks or offsets (via zipl) this gets overwritten. As a quick band-aid, lets move the virtqueue into the bss section, which is at 0x7f00000. As the bios code (text) is at 0x7e00000 we can now handle ramdisk which are ~27MB bigger. Long term we want to make the s390-ccw bios position independent and load of at the end of memory. Reported-by: Alexander Graf <agraf@suse.de> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Message-Id: <1425310029-53396-2-git-send-email-borntraeger@de.ibm.com>
2015-02-03pc-bios/s390-ccw: fix sparse warningsChristian Borntraeger
Fix some sparse warnings in the s390-ccw bios. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-07-08pc-bios/s390-ccw: store proper subsystem information wordChristian Borntraeger
POP chapter 17 requires to store a subsystem information word at 184 during IPL. Furthermore bytes 188-191 should be zero. The bootmap might contain data blocks that are written to the first page. We have to write these values after we processed the bootmap and before the final IPL. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-27pc-bios/s390-ccw: Add fill_hex_val func to provide better msgsEugene (jno) Dvurechenski
Factor out helper function for dumping a hex value into a buffer. Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com> Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-27pc-bios/s390-ccw: Unify error handlingEugene (jno) Dvurechenski
Convert to IPL_assert and friends Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com> Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-27pc-bios/s390-ccw: handle different sector sizesEugene (jno) Dvurechenski
Use the virtio device's configuration to figure out the disk geometry and use a sector size based upon the layout. [CH: s/SECTOR_SIZE/MAX_SECTOR_SIZE/g] Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com> Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-27pc-bios/s390-ccw: make checkpatch happyEugene (jno) Dvurechenski
Remove tabs, tweak whitespace and comments. Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com> Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2013-07-29s390/IPL: Allow boot from other ssid than 0Dominik Dingel
We now take the subchannel set id also into account to find the boot device. If we want to use a subchannel set other than the default set 0, we first need to enable the mss facility. Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-04-26s390-ccw.img: replace while loop with a disabled wait on s390 biosChristian Borntraeger
dont waste cpu power on an error condition. Lets stop the guest with a disabled wait. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-04-26S390: ccw firmware: Add glue headerAlexander Graf
Like all great programs, we have to call between different functions in different object files. And all of them need a common ground of defines. Provide a file that provides these defines. Signed-off-by: Alexander Graf <agraf@suse.de>
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