linux.git/drivers/dma/idxd, branch v6.14

Merge tag 'dmaengine-6.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine

2025-01-29T22:29:57+00:00

Pull dmaengine updates from Vinod Koul:
 "A bunch of new device support and updates to few drivers, biggest of
  them amd ones.

  New support:
   - TI J722S CSI BCDMA controller support
   - Intel idxd Panther Lake family platforms
   - Allwinner F1C100s suniv DMA
   - Qualcomm QCS615, QCS8300, SM8750, SA8775P GPI dma controller support
   - AMD ae4dma controller support and reorganisation of amd driver

  Updates:
   - Channel page support for Nvidia Tegra210 adma driver
   - Freescale support for S32G based platforms
   - Yamilfy atmel dma bindings"

* tag 'dmaengine-6.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine: (45 commits)
  dmaengine: idxd: Enable Function Level Reset (FLR) for halt
  dmaengine: idxd: Refactor halt handler
  dmaengine: idxd: Add idxd_device_config_save() and idxd_device_config_restore() helpers
  dmaengine: idxd: Binding and unbinding IDXD device and driver
  dmaengine: idxd: Add idxd_pci_probe_alloc() helper
  dt-bindings: dma: atmel: Convert to json schema
  dt-bindings: dma: st-stm32-dmamux: Add description for dma-cell values
  dmaengine: qcom: gpi: Add GPI immediate DMA support for SPI protocol
  dt-bindings: dma: adi,axi-dmac: deprecate adi,channels node
  dt-bindings: dma: adi,axi-dmac: convert to yaml schema
  dmaengine: mv_xor: switch to for_each_child_of_node_scoped()
  dmaengine: bcm2835-dma: Prevent suspend if DMA channel is busy
  dmaengine: tegra210-adma: Support channel page
  dt-bindings: dma: Support channel page to nvidia,tegra210-adma
  dmaengine: ti: k3-udma: Add support for J722S CSI BCDMA
  dt-bindings: dma: ti: k3-bcdma: Add J722S CSI BCDMA
  dmaengine: ti: edma: fix OF node reference leaks in edma_driver
  dmaengine: ti: edma: make the loop condition simpler in edma_probe()
  dmaengine: fsl-edma: read/write multiple registers in cyclic transactions
  dmaengine: fsl-edma: add support for S32G based platforms
  ...

dmaengine: idxd: Enable Function Level Reset (FLR) for halt

2024-12-24T10:38:05+00:00

When DSA/IAA device hits a fatal error, the device enters a halt state.
The driver can reset the device depending on Reset Type required by
hardware to recover the device.

Supported Reset Types are:
0: Reset Device command
1: Function Level Reset (FLR)
2: Warm reset
3: Cold reset

Currently, the driver only supports Reset Type 0.

This patch adds support for FLR recovery Type 1. Before issuing a PCIe
FLR command, IDXD device and WQ states are saved. After the FLR command
execution, the device is recovered to its previous states, allowing
the user can continue using the device.

Signed-off-by: Fenghua Yu 
Reviewed-by: Dave Jiang 
Link: https://lore.kernel.org/r/20241122233028.2762809-6-fenghua.yu@intel.com
Signed-off-by: Vinod Koul

dmaengine: idxd: Refactor halt handler

2024-12-24T10:38:04+00:00

Define a halt handling helper idxd_halt(). Refactor the halt interrupt
handler to call the helper. This will simplify the Function Level
Reset (FLR) code.

No functional change.

Signed-off-by: Fenghua Yu 
Reviewed-by: Dave Jiang 
Link: https://lore.kernel.org/r/20241122233028.2762809-5-fenghua.yu@intel.com
Signed-off-by: Vinod Koul

dmaengine: idxd: Add idxd_device_config_save() and idxd_device_config_restore() helpers

2024-12-24T10:38:04+00:00

Add the helpers to save and restore IDXD device configurations.

These helpers will be called during Function Level Reset (FLR) processing.

Signed-off-by: Fenghua Yu 
Reviewed-by: Dave Jiang 
Link: https://lore.kernel.org/r/20241122233028.2762809-4-fenghua.yu@intel.com
Signed-off-by: Vinod Koul

dmaengine: idxd: Binding and unbinding IDXD device and driver

2024-12-24T10:38:04+00:00

Add idxd_bind() and idxd_unbind() helpers to bind and unbind the IDXD
device and driver.

These helpers will be called during Function Level Reset (FLR) processing.

Signed-off-by: Fenghua Yu 
Reviewed-by: Dave Jiang 
Link: https://lore.kernel.org/r/20241122233028.2762809-3-fenghua.yu@intel.com
Signed-off-by: Vinod Koul

dmaengine: idxd: Add idxd_pci_probe_alloc() helper

2024-12-24T10:38:04+00:00

Add the idxd_pci_probe_alloc() helper to probe IDXD PCI device with or
without allocating and setting idxd software values.

The idxd_pci_probe() function is refactored to call this helper and
always probe the IDXD device with allocating and setting the software
values.

This helper will be called later in the Function Level Reset (FLR)
process without modifying the idxd software data.

Signed-off-by: Fenghua Yu 
Reviewed-by: Dave Jiang 
Link: https://lore.kernel.org/r/20241122233028.2762809-2-fenghua.yu@intel.com
Signed-off-by: Vinod Koul

dmaengine: idxd: Remove unused idxd_(un)register_bus_type

2024-12-24T09:21:45+00:00

idxd_register_bus_type() and idxd_unregister_bus_type() have been unused
since 2021's
commit d9e5481fca74 ("dmaengine: dsa: move dsa_bus_type out of idxd driver
to standalone")

Remove them.

Signed-off-by: Dr. David Alan Gilbert 
Reviewed-by: Fenghua Yu 
Link: https://lore.kernel.org/r/20241221141635.69412-1-linux@treblig.org
Signed-off-by: Vinod Koul

dmaengine: idxd: Add a new IAA device ID on Panther Lake family platforms

2024-12-11T12:05:08+00:00

A new IAA device ID, 0xb02d, is introduced across all Panther Lake family
platforms. Add the device ID to the IDXD driver.

Signed-off-by: Fenghua Yu 
Link: https://lore.kernel.org/r/20241024183500.281268-1-fenghua.yu@intel.com
Signed-off-by: Vinod Koul

module: Convert default symbol namespace to string literal

2024-12-03T16:22:25+00:00

Commit cdd30ebb1b9f ("module: Convert symbol namespace to string
literal") only converted MODULE_IMPORT_NS() and EXPORT_SYMBOL_NS(),
leaving DEFAULT_SYMBOL_NAMESPACE as a macro expansion.

This commit converts DEFAULT_SYMBOL_NAMESPACE in the same way to avoid
annoyance for the default namespace as well.

Signed-off-by: Masahiro Yamada 
Reviewed-by: Uwe Kleine-König 
Signed-off-by: Linus Torvalds

module: Convert symbol namespace to string literal

2024-12-02T19:34:44+00:00

Clean up the existing export namespace code along the same lines of
commit 33def8498fdd ("treewide: Convert macro and uses of __section(foo)
to __section("foo")") and for the same reason, it is not desired for the
namespace argument to be a macro expansion itself.

Scripted using

  git grep -l -e MODULE_IMPORT_NS -e EXPORT_SYMBOL_NS | while read file;
  do
    awk -i inplace '
      /^#define EXPORT_SYMBOL_NS/ {
        gsub(/__stringify\(ns\)/, "ns");
        print;
        next;
      }
      /^#define MODULE_IMPORT_NS/ {
        gsub(/__stringify\(ns\)/, "ns");
        print;
        next;
      }
      /MODULE_IMPORT_NS/ {
        $0 = gensub(/MODULE_IMPORT_NS\(([^)]*)\)/, "MODULE_IMPORT_NS(\"\\1\")", "g");
      }
      /EXPORT_SYMBOL_NS/ {
        if ($0 ~ /(EXPORT_SYMBOL_NS[^(]*)\(([^,]+),/) {
  	if ($0 !~ /(EXPORT_SYMBOL_NS[^(]*)\(([^,]+), ([^)]+)\)/ &&
  	    $0 !~ /(EXPORT_SYMBOL_NS[^(]*)\(\)/ &&
  	    $0 !~ /^my/) {
  	  getline line;
  	  gsub(/[[:space:]]*\\$/, "");
  	  gsub(/[[:space:]]/, "", line);
  	  $0 = $0 " " line;
  	}

  	$0 = gensub(/(EXPORT_SYMBOL_NS[^(]*)\(([^,]+), ([^)]+)\)/,
  		    "\\1(\\2, \"\\3\")", "g");
        }
      }
      { print }' $file;
  done

Requested-by: Masahiro Yamada 
Signed-off-by: Peter Zijlstra (Intel) 
Link: https://mail.google.com/mail/u/2/#inbox/FMfcgzQXKWgMmjdFwwdsfgxzKpVHWPlc
Acked-by: Greg KH 
Signed-off-by: Linus Torvalds