dmaengine: idxd: Fix max batch size for Intel IAA

mainline inclusion
from mainline-v6.1
commit e8dbd644
category: bugfix
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit e8dbd644 dmaengine: idxd: Fix max batch size for Intel IAA.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

>From Intel IAA spec [1], Intel IAA does not support batch processing.

Two batch related default values for IAA are incorrect in current code:
(1) The max batch size of device is set during device initialization,
    that indicates batch is supported. It should be always 0 on IAA.
(2) The max batch size of work queue is set to WQ_DEFAULT_MAX_BATCH (32)
    as the default value regardless of Intel DSA or IAA device during
    work queue setup and cleanup. It should be always 0 on IAA.

Fix the issues by setting the max batch size of device and max batch
size of work queue to 0 on IAA device, that means batch is not
supported.

[1]: https://cdrdv2.intel.com/v1/dl/getContent/721858



Fixes: 23084545 ("dmaengine: idxd: set max_xfer and max_batch for RO device")
Fixes: 92452a72 ("dmaengine: idxd: set defaults for wq configs")
Fixes: bfe1d560 ("dmaengine: idxd: Init and probe for Intel data accelerators")
Signed-off-by: Xiaochen Shen <xiaochen.shen@intel.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Fenghua Yu <fenghua.yu@intel.com>
Link: https://lore.kernel.org/r/20220930201528.18621-2-xiaochen.shen@intel.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Xiaochen Shen <xiaochen.shen@intel.com>