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misc: fastrpc: Add polling mode support

From:  Ekansh Gupta <ekansh.gupta-AT-oss.qualcomm.com>
To:  srini-AT-kernel.org, linux-arm-msm-AT-vger.kernel.org
Subject:  [PATCH v6 0/4] misc: fastrpc: Add polling mode support
Date:  Sun, 15 Feb 2026 23:51:31 +0530
Message-ID:  <20260215182136.3995111-1-ekansh.gupta@oss.qualcomm.com>
Cc:  gregkh-AT-linuxfoundation.org, quic_bkumar-AT-quicinc.com, linux-kernel-AT-vger.kernel.org, quic_chennak-AT-quicinc.com, dri-devel-AT-lists.freedesktop.org, arnd-AT-arndb.de, dmitry.baryshkov-AT-oss.qualcomm.com
Archive-link:  Article

This patch series adds polling mode feature that have been missing in
upstream FastRPC driver.

- Add changes to move fdlist to ctx structure to avoid code duplicacy.
- Update context mask to support polling mode.
- Add changes to support polling feature.

Userspace change: https://github.com/qualcomm/fastrpc/pull/258
Patch [v5]: https://lore.kernel.org/all/20251230062831.1195116-1-ekan...

Changes in v5:
  - Fixed poll memory calculation.
  - Added few formatting changes.

Changes in v5:
  - Add more details in commit text.

Changes in v4:
  - Replace hardcoded ctxid mask with GENMASK.
  - Fixed commit text.

Changes in v3:
  - Resolve compilation warning.

Changes in v2:
  - Added comments and fixed commit text.
  - Defined context id position as a macro.
  - Added new IOCTL to control polling mode as always enabling
    it might cause excess power consumption.
  - Cleaned up polling mode implementation.

Ekansh Gupta (4):
  misc: fastrpc: Move fdlist to invoke context structure
  misc: fastrpc: Replace hardcoded ctxid mask with GENMASK
  misc: fastrpc: Expand context ID mask for DSP polling mode support
  misc: fastrpc: Add polling mode support for fastRPC driver

 drivers/misc/fastrpc.c      | 166 +++++++++++++++++++++++++++++++-----
 include/uapi/misc/fastrpc.h |  10 +++
 2 files changed, 154 insertions(+), 22 deletions(-)

-- 
2.34.1




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