[PATCH net-next v2 0/3] dinghai: firmware handshake, MSI-X pools and async event queues

[han.junyang]

From: Junyang Han <han.junyang@xxxxxxxxxx>

This series continues the DingHai (ZXDH) PF driver bring-up: after PCI
probing, it verifies the firmware version contract, waits for the
RISC-V management core to become ready, sets up the MSI-X interrupt
pools, and creates the async event queues through which the firmware
will report events.

Some notes on the IRQ design:

The vector space is partitioned into per-purpose pools (async, RDMA,
vq). Event queues share a vector through an atomic notifier chain
attached to the IRQ, and the sharing degree is governed by pool
thresholds. The IRQ table hangs off a void *priv in the shared core
device: the PF, MPF and SF core devices each carry a different pool
layout behind that pointer, so a type-specific struct in en_pf.c keeps
the shared header free of PF-only details.

Changes in v2:
- Convert both firmware readiness polls to readx_poll_timeout()
  (Andrew Lunn).
- Read the fw compat block field by field through ioread*() accessors
  instead of an ioread32_rep() bulk copy, which misplaces the u8/u16
  fields on big-endian; no __le annotations are needed since each
  accessor converts from little-endian (Andrew Lunn).
- Use kref for the IRQ reference count (Andrew Lunn).

Junyang Han (3):
  dinghai: add firmware version check and RISC-V readiness polling
  dinghai: add MSI-X interrupt pools
  dinghai: add async event queue for firmware notifications

 drivers/net/ethernet/zte/dinghai/Makefile   |   2 +-
 drivers/net/ethernet/zte/dinghai/en_pf.c    | 225 +++++++++++
 drivers/net/ethernet/zte/dinghai/en_pf.h    |  57 +++
 drivers/net/ethernet/zte/dinghai/zxdh_eq.c  | 145 +++++++
 drivers/net/ethernet/zte/dinghai/zxdh_eq.h  |  61 +++
 drivers/net/ethernet/zte/dinghai/zxdh_irq.c | 412 ++++++++++++++++++++
 drivers/net/ethernet/zte/dinghai/zxdh_irq.h |  72 ++++
 7 files changed, 973 insertions(+), 1 deletion(-)
 create mode 100644 drivers/net/ethernet/zte/dinghai/zxdh_eq.c
 create mode 100644 drivers/net/ethernet/zte/dinghai/zxdh_eq.h
 create mode 100644 drivers/net/ethernet/zte/dinghai/zxdh_irq.c
 create mode 100644 drivers/net/ethernet/zte/dinghai/zxdh_irq.h

-- 
2.27.0