accel/qaic: Collect crashdump from SSR channel

accel/qaic: Collect crashdump from SSR channel

After subsystem of the device has crashed it sends a message with
command DEBUG_TRANSFER_INFO to kernel(host). Send ACK for that message
and then prepare to collect the ramdump of the subsystem

Steps of crashdump collection is as follows,
1)  Device sends DEBUG_TRANSFER_INFO message indicating that device wants
    to send crashdump.
2)  Send an acknowledgment to that message either ACK or NACK.
    a) NACK will inform the device that host will not download the
       crashdump
    b) ACK will inform the device that host will download the crashdump
3)  Along with the DEBUG_TRANSFER_INFO we receive a table base address and
    its length, use that to download that table from device.
    a) This table is meta data of the crashdump and not the actual
       crashdump.
4)  After we respond as ACK for message received on step 1) we start
    downloading the table. Use series of MEMORY_READ/MEMORY_READ_RSP SSR
    commands to download the entire table.
5)  Each entry in the table represents a segment of crashdump. Once the
    table downloading is complete, iterate through each entry of table
    and download each crashdump segment(same as table itself). Table entry
    contains the memory base address and length along with other info.
6)  After the entire crashdump is downloaded send DEBUG_TRANSFER_DONE
    which marks that host is terminating the crashdump transfer. This
    message can be send in both success or error case.
7)  After receiving DEBUG_TRANSFER_DONE_RSP hand over the crashdump to
    dev_coredumpv() and free all the necessary memory.

Co-developed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Signed-off-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Co-developed-by: Pranjal Ramajor Asha Kanojiya <quic_pkanojiy@quicinc.com>
Signed-off-by: Pranjal Ramajor Asha Kanojiya <quic_pkanojiy@quicinc.com>
Signed-off-by: Pranjal Ramajor Asha Kanojiya <pkanojiy@codeaurora.org>
Signed-off-by: Youssef Samir <youssef.abdulrahman@oss.qualcomm.com>
Signed-off-by: Zack McKevitt <zachary.mckevitt@oss.qualcomm.com>
Reviewed-by: Jeff Hugo <jeff.hugo@oss.qualcomm.com>
Signed-off-by: Jeff Hugo <jeff.hugo@oss.qualcomm.com>
Link: https://patch.msgid.link/20251031174059.2814445-4-zachary.mckevitt@oss.qualcomm.com