if_bnxt: Add Firmware crashdump collection support

This patch adds support for DDR-based firmware coredump memory handling.
It detects firmware coredump capability, allocates host DDR (DMA) memory
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if_bnxt: Add Firmware crashdump collection support

This patch adds support for DDR-based firmware coredump memory handling.
It detects firmware coredump capability, allocates host DDR (DMA) memory
for crash dumps, and programs the firmware with the allocated memory during
attach. The allocated memory is released during driver detach.

Also, This patch adds functions to retrieve crash dump data from host DDR
memory. The implementation handles data copying from page tables and
checks dump availability. Main function bnxt_get_coredump() copies
stored crash dump data from DDR memory to the application buffer.

MFC after: 2 weeks
Reviewed by: gallatin, ssaxena
Differential Revision: https://reviews.freebsd.org/D56684

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if_bnxt/bnxt_re: add support for driver snapdump

Add a logging module which helps to log and collect the driver`s
various events and state of device data structures.
APIs help modules like l2, RoCE

if_bnxt/bnxt_re: add support for driver snapdump

Add a logging module which helps to log and collect the driver`s
various events and state of device data structures.
APIs help modules like l2, RoCE etc. to register and
add logs into thg buffers. A segment header is added to the
data available in buffers.

The final log messages are arranged in following fashion

|SegHeader0|Data0|SegHeader1|Data1|
Logging module provides two different kinds of buffers:
a) A large contiguous memory chunk is used to form circular buffers.

Module need to provide a number of buffers while registering to
the logging module.Please note that, since memory for the
buffers remains with the module as long as it is registered, memory
footprints of the driver could be higher so the modules should
allocate an appropriate number of buffers. Also, due to limited
space, modules should only log important events/messages into
the buffer.
Modules must use bnxt_log_add_mssg() to add the message into the
list.
b) Live buffer - They are allocated during coredump retrieval and

freed after the coredump data is returned to the user. This helps
to collect live data from the driver. Modules must use the
bnxt_log_live() function to add the log messages.
When coredump is retrieved all the messages available in above buffers are
copied into the coredump buffer.

Test Plan:
Generate the coredump using below niccli command
./niccli.freebsd -i 1 debug --coredump

and then verify the coredump contents using the Broadcom's Coredump decoder.

MFC after: 2 weeks
Reviewed by: gallatin, ssaxena
Differential Revision: https://reviews.freebsd.org/D56682

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bnxt_en: Add core SR-IOV infrastructure

Introduce the foundational building blocks for SR-IOV Virtual Function
support on Broadcom NetXtreme-C/E adapters.

* Add bnxt_sriov.h: defines the extended b

bnxt_en: Add core SR-IOV infrastructure

Introduce the foundational building blocks for SR-IOV Virtual Function
support on Broadcom NetXtreme-C/E adapters.

* Add bnxt_sriov.h: defines the extended bnxt_vf_info structure (per-VF
firmware FID, MAC addresses, VLAN, flags, DMA command buffers, resource
counts), the bnxt_resc_map helper, flag macros (BNXT_VF_TRUST,
BNXT_VF_SPOOFCHK, etc.), and prototypes for all SR-IOV functions.

* Add bnxt_sriov.c: implements the SR-IOV attachment sequence
(bnxt_sriov_attach), the iflib IOV callbacks (bnxt_iov_init,
bnxt_iov_uninit, bnxt_iov_vf_add), VF resource allocation and
firmware configuration helpers (bnxt_alloc_vf_resources,
bnxt_cfg_hw_sriov, bnxt_hwrm_func_vf_resc_cfg, bnxt_hwrm_func_buf_rgtr,
bnxt_hwrm_func_vf_resource_free), and the per-VF parameter helper.

* Extend bnxt.h: include bnxt_sriov.h; extend bnxt_pf_info with VF-
tracking fields (vf array, firmware FID/MAC, resource-reservation
strategy, DMA page management, sysctl context); replace the upstream
bnxt_vf_info stub with the full definition from bnxt_sriov.h; extend
bnxt_func_qcfg with allocation counters required by the VF resource
configuration path; add vf_resc_cfg_input and sriov_lock to bnxt_softc.

* Update Makefile to build bnxt_sriov.c and include bnxt_sriov.h.

* Wire up PCI-IOV device methods (pci_iov_init / pci_iov_uninit /
pci_iov_add_vf) and iflib IOV callbacks (ifdi_iov_init / ifdi_iov_uninit
/ ifdi_iov_vf_add) in if_bnxt.c; call bnxt_sriov_attach() from
bnxt_attach_post() on P5+ Physical Functions.

MFC after: 1 month
Reviewed by: ssaxena
Differential Revision: https://reviews.freebsd.org/D56197

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