[ Upstream commit 6a4b50585d74fe45d3ade1e3e86ba8aae79761a5 ]

The buffer used for "qp%d" was only 4 bytes, which truncates names like
"qp10" to "qp1" and causes multiple queues to share the same directory.

Enlarge the buffer and use sizeof() to avoid truncation.

Fixes: fce8a7bb5b4b ("PCI-Express Non-Transparent Bridge Support")
Cc: <stable@vger.kernel.org> # v3.9+
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Koichiro Den <den@valinux.co.jp>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Signed-off-by: Sasha Levin <sashal@kernel.org>

[ Upstream commit 186615f8855a0be4ee7d3fcd09a8ecc10e783b08 ]

Number of MW LUTs depends on NTB configuration and can be set to zero,
in such scenario rounddown_pow_of_two will cause undefined behaviour and
should not be performed.
This patch ensures that rounddown_pow_of_two is called on valid value.

Signed-off-by: Maciej Grochowski <Maciej.Grochowski@sony.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Signed-off-by: Sasha Levin <sashal@kernel.org>

[ Upstream commit c8ba7ad2cc1c7b90570aa347b8ebbe279f1eface ]

Number of MW LUTs depends on NTB configuration and can be set to MAX_MWS,
This patch protects against invalid index out of bounds access to mw_sizes
When invalid access print message to user that configuration is not valid.

Signed-off-by: Maciej Grochowski <Maciej.Grochowski@sony.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Signed-off-by: Sasha Levin <sashal@kernel.org>

[ Upstream commit 2ccb5e8dbcd2dedf13e0270165ac48bd79b7f673 ]

When the mutex 'link_event_lock' was introduced, it was never
initialized and it triggers kernel warnings when used with locking
debug turned on. Add initialization for the mutex.

Fixes: 3db835dd8f9a ("ntb: Add mutex to make link_event_callback executed linearly.")
Cc: fuyuanli <fuyuanli0722@gmail.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Signed-off-by: Sasha Levin <sashal@kernel.org>

Add virtual non-transparent bridge support for Renesas rcar platform

Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>

The NTB epf host driver assumes the BAR number associated with a memory
window is just incremented from the BAR number associated with MW1. This
seems to have been enough so far but this is not really how the endpoint
side work and the two could easily become mis-aligned.

ntb_epf_mw_to_bar() even assumes that the BAR number is the memory window
index + 2, which means the function only returns a proper result if BAR_2
is associated with MW1.

Instead, fully describe and allow arbitrary NTB BAR mapping.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>

Since the CPU selected by schedule_work is uncertain, multiple link_event
callbacks may be executed at same time. For example, after peer's link is
up, it is down quickly before local link_work completed. If link_cleanup
is added to the workqueue of another CPU, then link_work and link_cleanup
may be executed at the same time. So add a mutex to prevent them from being
executed concurrently.

Signed-off-by: fuyuanli <fuyuanli@didiglobal.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>

In the NTB secondary topology configuration of the latest generation,
the device behaves like an endpoint. Hence, add endpoint support and
update amd_ntb_get_link_status to accommodate endpoint devices.

Co-developed-by: Sanath S <Sanath.S@amd.com>
Signed-off-by: Sanath S <Sanath.S@amd.com>
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>

Convert the code to use the new guard(msi_descs_lock).

No functional change intended.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Acked-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/all/20250319105506.263456735@linutronix.de

Pull ntb fixes from Jon Mason:
 "Bug fixes for NTB Switchtec driver mw negative shift, Intel NTB link
  status db, ntb_perf double unmap (in error case), and MSI 64bit
  arithmetic.

  Also, add new AMD NTB PCI IDs, update AMD NTB maintainer, and pull in
  patch to reduce the stack usage in IDT driver"

* tag 'ntb-6.15' of https://github.com/jonmason/ntb:
  ntb_hw_amd: Add NTB PCI ID for new gen CPU
  ntb: reduce stack usage in idt_scan_mws
  ntb: use 64-bit arithmetic for the MSI doorbell mask
  MAINTAINERS: Update AMD NTB maintainers
  ntb_perf: Delete duplicate dmaengine_unmap_put() call in perf_copy_chunk()
  ntb: intel: Fix using link status DB's
  ntb_hw_switchtec: Fix shift-out-of-bounds in switchtec_ntb_mw_set_trans