esp.c: remove explicit setting of DRQ within ESP state machine

Now the esp_update_drq() is called for all reads/writes to the FIFO, there is
no need to manually raise and lower the DRQ signal.

Sign

esp.c: remove explicit setting of DRQ within ESP state machine

Now the esp_update_drq() is called for all reads/writes to the FIFO, there is
no need to manually raise and lower the DRQ signal.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/611
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1831
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20240324191707.623175-18-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

show more ...

esp.c: ensure esp_pdma_write() always calls esp_fifo_push()

This ensures that esp_update_drq() is called via esp_fifo_push() whenever the
host uses PDMA to transfer data to a SCSI device.

Signed-of

esp.c: ensure esp_pdma_write() always calls esp_fifo_push()

This ensures that esp_update_drq() is called via esp_fifo_push() whenever the
host uses PDMA to transfer data to a SCSI device.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20240324191707.623175-17-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

show more ...

esp.c: update esp_fifo_{push, pop}() to call esp_update_drq()

This ensures that the DRQ line is always set correctly when reading/writing
single bytes to/from the FIFO.

Signed-off-by: Mark Cave-Ayl

esp.c: update esp_fifo_{push, pop}() to call esp_update_drq()

This ensures that the DRQ line is always set correctly when reading/writing
single bytes to/from the FIFO.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20240324191707.623175-16-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

show more ...

esp.c: introduce esp_update_drq() and update esp_fifo_{push, pop}_buf() to use it

This new function sets the DRQ line correctly according to the current transfer
mode, direction and FIFO contents. U

esp.c: introduce esp_update_drq() and update esp_fifo_{push, pop}_buf() to use it

This new function sets the DRQ line correctly according to the current transfer
mode, direction and FIFO contents. Update esp_fifo_push_buf() and esp_fifo_pop_buf()
to use it so that DRQ is always set correctly when reading/writing multiple bytes
to/from the FIFO.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20240324191707.623175-15-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

show more ...

esp.c: move esp_set_phase() and esp_get_phase() towards the beginning of the file

This allows these functions to be used earlier in the file without needing a
separate forward declaration.

Signed-o

esp.c: move esp_set_phase() and esp_get_phase() towards the beginning of the file

This allows these functions to be used earlier in the file without needing a
separate forward declaration.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20240324191707.623175-14-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

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esp.c: prevent cmdfifo overflow in esp_cdb_ready()

During normal use the cmdfifo will never wrap internally and cmdfifo_cdb_offset
will always indicate the start of the SCSI CDB. However it is possi

esp.c: prevent cmdfifo overflow in esp_cdb_ready()

During normal use the cmdfifo will never wrap internally and cmdfifo_cdb_offset
will always indicate the start of the SCSI CDB. However it is possible that a
malicious guest could issue an invalid ESP command sequence such that cmdfifo
wraps internally and cmdfifo_cdb_offset could point beyond the end of the FIFO
data buffer.

Add an extra check to fifo8_peek_buf() to ensure that if the cmdfifo has wrapped
internally then esp_cdb_ready() will exit rather than allow scsi_cdb_length() to
access data outside the cmdfifo data buffer.

Reported-by: Chuhong Yuan <hslester96@gmail.com>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20240324191707.623175-13-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

show more ...

esp.c: rework esp_cdb_length() into esp_cdb_ready()

The esp_cdb_length() function is only used as part of a calculation to determine
whether the cmdfifo contains an entire SCSI CDB. Rework esp_cdb_l

esp.c: rework esp_cdb_length() into esp_cdb_ready()

The esp_cdb_length() function is only used as part of a calculation to determine
whether the cmdfifo contains an entire SCSI CDB. Rework esp_cdb_length() into a
new esp_cdb_ready() function which both enables us to handle the case where
scsi_cdb_length() returns -1, plus simplify the logic for its callers.

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20240324191707.623175-12-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

show more ...

esp.c: don't assert() if FIFO empty when executing non-DMA SELATNS

The current logic assumes that at least 1 byte is present in the FIFO when
executing a non-DMA SELATNS command, but this may not be

esp.c: don't assert() if FIFO empty when executing non-DMA SELATNS

The current logic assumes that at least 1 byte is present in the FIFO when
executing a non-DMA SELATNS command, but this may not be the case if the
guest executes an invalid ESP command sequence.

Reported-by: Chuhong Yuan <hslester96@gmail.com>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20240324191707.623175-11-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

show more ...

esp.c: introduce esp_fifo_push_buf() function for pushing to the FIFO

Instead of pushing data into the FIFO directly with fifo8_push_all(), add a new
esp_fifo_push_buf() function and use it accordin

esp.c: introduce esp_fifo_push_buf() function for pushing to the FIFO

Instead of pushing data into the FIFO directly with fifo8_push_all(), add a new
esp_fifo_push_buf() function and use it accordingly.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20240324191707.623175-10-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

show more ...

esp.c: change esp_fifo_pop_buf() to take ESPState

Now that all users of esp_fifo_pop_buf() operate on the main FIFO there is no
need to pass the FIFO explicitly.

Signed-off-by: Mark Cave-Ayland <ma

esp.c: change esp_fifo_pop_buf() to take ESPState

Now that all users of esp_fifo_pop_buf() operate on the main FIFO there is no
need to pass the FIFO explicitly.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20240324191707.623175-9-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

show more ...

esp.c: use esp_fifo_push() instead of fifo8_push()

There are still a few places that use fifo8_push() instead of esp_fifo_push() in
order to push a value into the FIFO. Update those places to use es

esp.c: use esp_fifo_push() instead of fifo8_push()

There are still a few places that use fifo8_push() instead of esp_fifo_push() in
order to push a value into the FIFO. Update those places to use esp_fifo_push()
instead.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20240324191707.623175-8-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

show more ...

esp.c: change esp_fifo_pop() to take ESPState

Now that all users of esp_fifo_pop() operate on the main FIFO there is no need
to pass the FIFO explicitly.

Signed-off-by: Mark Cave-Ayland <mark.cave-

esp.c: change esp_fifo_pop() to take ESPState

Now that all users of esp_fifo_pop() operate on the main FIFO there is no need
to pass the FIFO explicitly.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20240324191707.623175-7-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

show more ...

esp.c: change esp_fifo_push() to take ESPState

Now that all users of esp_fifo_push() operate on the main FIFO there is no need
to pass the FIFO explicitly.

Signed-off-by: Mark Cave-Ayland <mark.cav

esp.c: change esp_fifo_push() to take ESPState

Now that all users of esp_fifo_push() operate on the main FIFO there is no need
to pass the FIFO explicitly.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20240324191707.623175-6-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

show more ...

esp.c: replace cmdfifo use of esp_fifo_pop() in do_message_phase()

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by

esp.c: replace cmdfifo use of esp_fifo_pop() in do_message_phase()

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20240324191707.623175-5-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

show more ...

esp.c: replace esp_fifo_pop_buf() with esp_fifo8_pop_buf() in do_message_phase()

The aim is to restrict the esp_fifo_*() functions so that they only operate on
the hardware FIFO. When reading from c

esp.c: replace esp_fifo_pop_buf() with esp_fifo8_pop_buf() in do_message_phase()

The aim is to restrict the esp_fifo_*() functions so that they only operate on
the hardware FIFO. When reading from cmdfifo in do_message_phase() use the
underlying esp_fifo8_pop_buf() function directly.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20240324191707.623175-4-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

show more ...

esp.c: replace esp_fifo_pop_buf() with esp_fifo8_pop_buf() in do_command_phase()

The aim is to restrict the esp_fifo_*() functions so that they only operate on
the hardware FIFO. When reading from c

esp.c: replace esp_fifo_pop_buf() with esp_fifo8_pop_buf() in do_command_phase()

The aim is to restrict the esp_fifo_*() functions so that they only operate on
the hardware FIFO. When reading from cmdfifo in do_command_phase() use the
underlying esp_fifo8_pop_buf() function directly.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20240324191707.623175-3-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

show more ...

esp.c: move esp_fifo_pop_buf() internals to new esp_fifo8_pop_buf() function

Update esp_fifo_pop_buf() to be a simple wrapper onto the new esp_fifo8_pop_buf()
function.

Signed-off-by: Mark Cave-Ayl

esp.c: move esp_fifo_pop_buf() internals to new esp_fifo8_pop_buf() function

Update esp_fifo_pop_buf() to be a simple wrapper onto the new esp_fifo8_pop_buf()
function.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20240324191707.623175-2-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

show more ...

lsi53c895a: avoid out of bounds access to s->msg[]

If no bytes are there to process in the message in phase,
the input data latch (s->sidl) is set to s->msg[-1]. Just
do nothing since no DMA is per

lsi53c895a: avoid out of bounds access to s->msg[]

If no bytes are there to process in the message in phase,
the input data latch (s->sidl) is set to s->msg[-1]. Just
do nothing since no DMA is performed.

Reported-by: Chuhong Yuan <hslester96@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

show more ...

hw/scsi/scsi-generic: Fix io_timeout property not applying

The io_timeout property, introduced in c9b6609 (part of 6.0) is
silently overwritten by the hardcoded default value of 30 seconds
(DEFAULT_

hw/scsi/scsi-generic: Fix io_timeout property not applying

The io_timeout property, introduced in c9b6609 (part of 6.0) is
silently overwritten by the hardcoded default value of 30 seconds
(DEFAULT_IO_TIMEOUT) in scsi_generic_realize because that function is
being called after the properties have already been applied.

The property definition already has a default value which is applied
correctly when no value is explicitly set, so we can just remove the
code which overrides the io_timeout completely.

This has been tested by stracing SG_IO operations with the io_timeout
property set and unset and now sets the timeout field in the ioctl
request to the proper value.

Fixes: c9b6609b69facad ("scsi: make io_timeout configurable")
Signed-off-by: Lorenz Brun <lorenz@brun.one>
Message-ID: <20240315145831.2531695-1-lorenz@brun.one>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

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hw/scsi/vhost-scsi: Fix missing ERRP_GUARD() for error_prepend()

As the comment in qapi/error, passing @errp to error_prepend() requires
ERRP_GUARD():

* = Why, when and how to use ERRP_GUARD() =
*

hw/scsi/vhost-scsi: Fix missing ERRP_GUARD() for error_prepend()

As the comment in qapi/error, passing @errp to error_prepend() requires
ERRP_GUARD():

* = Why, when and how to use ERRP_GUARD() =
*
* Without ERRP_GUARD(), use of the @errp parameter is restricted:
...
* - It should not be passed to error_prepend(), error_vprepend() or
* error_append_hint(), because that doesn't work with &error_fatal.
* ERRP_GUARD() lifts these restrictions.
*
* To use ERRP_GUARD(), add it right at the beginning of the function.
* @errp can then be used without worrying about the argument being
* NULL or &error_fatal.

ERRP_GUARD() could avoid the case when @errp is &error_fatal, the user
can't see this additional information, because exit() happens in
error_setg earlier than information is added [1].

The vhost_scsi_realize() passes @errp to error_prepend(), and as a
VirtioDeviceClass.realize method, its @errp is from DeviceClass.realize
so that there is no guarantee that the @errp won't point to
@error_fatal.

To avoid the issue like [1] said, add missing ERRP_GUARD() at the
beginning of this function.

[1]: Issue description in the commit message of commit ae7c80a7bd73
("error: New macro ERRP_GUARD()").

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Fam Zheng <fam@euphon.net>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Message-ID: <20240311033822.3142585-18-zhao1.liu@linux.intel.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

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hw/scsi/lsi53c895a: Fix typo in comment

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

hw/scsi/lsi53c895a: stop script on phase mismatch

Netbsd isn't happy with qemu lsi53c895a emulation:

cd0(esiop0:0:2:0): command with tag id 0 reset
esiop0: autoconfiguration error: phase mismatch w

hw/scsi/lsi53c895a: stop script on phase mismatch

Netbsd isn't happy with qemu lsi53c895a emulation:

cd0(esiop0:0:2:0): command with tag id 0 reset
esiop0: autoconfiguration error: phase mismatch without command
esiop0: autoconfiguration error: unhandled scsi interrupt, sist=0x80 sstat1=0x0 DSA=0x23a64b1 DSP=0x50

This is because lsi_bad_phase() triggers a phase mismatch, which
stops SCRIPT processing. However, after returning to
lsi_command_complete(), SCRIPT is restarted with lsi_resume_script().
Fix this by adding a return value to lsi_bad_phase(), and only resume
script processing when lsi_bad_phase() didn't trigger a host interrupt.

Signed-off-by: Sven Schnelle <svens@stackframe.org>
Tested-by: Helge Deller <deller@gmx.de>
Message-ID: <20240302214453.2071388-1-svens@stackframe.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

show more ...

hw/scsi/lsi53c895a: add timer to scripts processing

HP-UX 10.20 seems to make the lsi53c895a spinning on a memory location
under certain circumstances. As the SCSI controller and CPU are not
running

hw/scsi/lsi53c895a: add timer to scripts processing

HP-UX 10.20 seems to make the lsi53c895a spinning on a memory location
under certain circumstances. As the SCSI controller and CPU are not
running at the same time this loop will never finish. After some
time, the check loop interrupts with a unexpected device disconnect.
This works, but is slow because the kernel resets the scsi controller.
Instead of signaling UDC, start a timer and exit the loop. Until the
timer fires, the CPU can process instructions which might changes the
memory location.

The limit of instructions is also reduced because scripts running on
the SCSI processor are usually very short. This keeps the time until
the loop is exit short.

Suggested-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Sven Schnelle <svens@stackframe.org>
Message-ID: <20240229204407.1699260-1-svens@stackframe.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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esp.c: add my copyright to the file

This series has involved rewriting and/or updating a considerable part of the ESP
emulation so update the copyright in esp.c to reflect this.

Signed-off-by: Mark

esp.c: add my copyright to the file

This series has involved rewriting and/or updating a considerable part of the ESP
emulation so update the copyright in esp.c to reflect this.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Tested-by: Helge Deller <deller@gmx.de>
Tested-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20240112125420.514425-89-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

show more ...

esp.c: switch TypeInfo registration to use DEFINE_TYPES() macro

The use of the DEFINE_TYPES() macro will soon be recommended over the use of
calling type_init() directly.

Signed-off-by: Mark Cave-A

esp.c: switch TypeInfo registration to use DEFINE_TYPES() macro

The use of the DEFINE_TYPES() macro will soon be recommended over the use of
calling type_init() directly.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Tested-by: Helge Deller <deller@gmx.de>
Tested-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20240112125420.514425-88-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

show more ...