linux-toradex.git/kernel/dma, branch v6.0-rc1

Merge tag 'rproc-v5.20' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux

2022-08-08T22:16:29+00:00

Pull remoteproc updates from Bjorn Andersson:
 "This introduces support for the remoteproc on Mediatek MT8188, and
  enables caches for MT8186 SCP. It adds support for PRU cores found on
  the TI K3 AM62x SoCs.

  It moves the recovery work after a firmware crash to an unbound
  workqueue, to allow recovery to happen in parallel.

  A new DMA API is introduced to release dma_mem for a device.

  It adds support a panic handler for the Qualcomm modem remoteproc,
  with the goal of having caches flushed in memory dumps for post-mortem
  debugging and it introduces a mechanism to wait for the modem firmware
  on SM8450 to decrypt part of its memory for post-mortem debugging.

  Qualcomm sysmon is restricted to only inform remote processors about
  peers that are actually running, to avoid a race where Linux tries to
  notify a recovering remote processor about its peers new state. A
  mechanism for waiting for the sysmon connection to be established is
  also introduced, to avoid out-of-sync updates for rapidly restarting
  remote processors.

  A number of Devicetree binding cleanups and conversions to YAML are
  introduced, to facilitate Devicetree validation. Lastly it introduces
  a number of smaller fixes and cleanups in the core and a few different
  drivers"

* tag 'rproc-v5.20' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux: (42 commits)
  remoteproc: qcom_q6v5_pas: Do not fail if regulators are not found
  drivers/remoteproc: fix repeated words in comments
  remoteproc: Directly use ida_alloc()/free()
  remoteproc: Use unbounded workqueue for recovery work
  remoteproc: using pm_runtime_resume_and_get instead of pm_runtime_get_sync
  remoteproc: qcom_q6v5_pas: Deal silently with optional px and cx regulators
  remoteproc: sysmon: Send sysmon state only for running rprocs
  remoteproc: sysmon: Wait for SSCTL service to come up
  remoteproc: qcom: q6v5: Set q6 state to offline on receiving wdog irq
  remoteproc: qcom: pas: Check if coredump is enabled
  remoteproc: qcom: pas: Mark devices as wakeup capable
  remoteproc: qcom: pas: Mark va as io memory
  remoteproc: qcom: pas: Add decrypt shutdown support for modem
  remoteproc: qcom: q6v5-mss: add powerdomains to MSM8996 config
  remoteproc: qcom_q6v5: Introduce panic handler for MSS
  remoteproc: qcom_q6v5_mss: Update MBA log info
  remoteproc: qcom: correct kerneldoc
  remoteproc: qcom_q6v5_mss: map/unmap metadata region before/after use
  remoteproc: qcom: using pm_runtime_resume_and_get to simplify the code
  remoteproc: mediatek: Support MT8188 SCP
  ...

Merge tag 'dma-mapping-5.20-2022-08-06' of git://git.infradead.org/users/hch/dma-mapping

2022-08-06T17:56:45+00:00

Pull dma-mapping updates from Christoph Hellwig:

 - convert arm32 to the common dma-direct code (Arnd Bergmann, Robin
   Murphy, Christoph Hellwig)

 - restructure the PCIe peer to peer mapping support (Logan Gunthorpe)

 - allow the IOMMU code to communicate an optional DMA mapping length
   and use that in scsi and libata (John Garry)

 - split the global swiotlb lock (Tianyu Lan)

 - various fixes and cleanup (Chao Gao, Dan Carpenter, Dongli Zhang,
   Lukas Bulwahn, Robin Murphy)

* tag 'dma-mapping-5.20-2022-08-06' of git://git.infradead.org/users/hch/dma-mapping: (45 commits)
  swiotlb: fix passing local variable to debugfs_create_ulong()
  dma-mapping: reformat comment to suppress htmldoc warning
  PCI/P2PDMA: Remove pci_p2pdma_[un]map_sg()
  RDMA/rw: drop pci_p2pdma_[un]map_sg()
  RDMA/core: introduce ib_dma_pci_p2p_dma_supported()
  nvme-pci: convert to using dma_map_sgtable()
  nvme-pci: check DMA ops when indicating support for PCI P2PDMA
  iommu/dma: support PCI P2PDMA pages in dma-iommu map_sg
  iommu: Explicitly skip bus address marked segments in __iommu_map_sg()
  dma-mapping: add flags to dma_map_ops to indicate PCI P2PDMA support
  dma-direct: support PCI P2PDMA pages in dma-direct map_sg
  dma-mapping: allow EREMOTEIO return code for P2PDMA transfers
  PCI/P2PDMA: Introduce helpers for dma_map_sg implementations
  PCI/P2PDMA: Attempt to set map_type if it has not been set
  lib/scatterlist: add flag for indicating P2PDMA segments in an SGL
  swiotlb: clean up some coding style and minor issues
  dma-mapping: update comment after dmabounce removal
  scsi: sd: Add a comment about limiting max_sectors to shost optimal limit
  ata: libata-scsi: cap ata_device->max_sectors according to shost->max_sectors
  scsi: scsi_transport_sas: cap shost opt_sectors according to DMA optimal limit
  ...

swiotlb: fix passing local variable to debugfs_create_ulong()

2022-07-28T14:23:30+00:00

Debugfs node will be run-timely checked and so local variable
should be not passed to debugfs_create_ulong(). Fix it via
debugfs_create_file() to create io_tlb_used node and calculate
used io tlb number with fops_io_tlb_used attribute.

Fixes: 20347fca71a3 ("swiotlb: split up the global swiotlb lock")
Signed-off-by: Tianyu Lan 
Signed-off-by: Christoph Hellwig

dma-mapping: reformat comment to suppress htmldoc warning

2022-07-28T14:21:33+00:00

make html doc reports a cryptic warning with the commit named below:

  kernel/dma/mapping.c:258: WARNING: Option list ends without a blank
                                     line; unexpected unindent.

Seems the parser is a bit fussy about the tabbing and having a single
space tab causes the warning. To suppress the warning add another
tab to the list and reindent everything.

Fixes: 7c2645a2a30a ("dma-mapping: allow EREMOTEIO return code for P2PDMA transfers")
Signed-off-by: Logan Gunthorpe 
Signed-off-by: Christoph Hellwig

dma-mapping: add flags to dma_map_ops to indicate PCI P2PDMA support

2022-07-26T11:27:48+00:00

Add a flags member to the dma_map_ops structure with one flag to
indicate support for PCI P2PDMA.

Also, add a helper to check if a device supports PCI P2PDMA.

Signed-off-by: Logan Gunthorpe 
Reviewed-by: Jason Gunthorpe 
Reviewed-by: Christoph Hellwig 
Signed-off-by: Christoph Hellwig

dma-direct: support PCI P2PDMA pages in dma-direct map_sg

2022-07-26T11:27:47+00:00

Add PCI P2PDMA support for dma_direct_map_sg() so that it can map
PCI P2PDMA pages directly without a hack in the callers. This allows
for heterogeneous SGLs that contain both P2PDMA and regular pages.

A P2PDMA page may have three possible outcomes when being mapped:
  1) If the data path between the two devices doesn't go through the
     root port, then it should be mapped with a PCI bus address
  2) If the data path goes through the host bridge, it should be mapped
     normally, as though it were a CPU physical address
  3) It is not possible for the two devices to communicate and thus
     the mapping operation should fail (and it will return -EREMOTEIO).

SGL segments that contain PCI bus addresses are marked with
sg_dma_mark_pci_p2pdma() and are ignored when unmapped.

P2PDMA mappings are also failed if swiotlb needs to be used on the
mapping.

Signed-off-by: Logan Gunthorpe 
Reviewed-by: Christoph Hellwig 
Signed-off-by: Christoph Hellwig

dma-mapping: allow EREMOTEIO return code for P2PDMA transfers

2022-07-26T11:27:47+00:00

Add EREMOTEIO error return to dma_map_sgtable() which will be used
by .map_sg() implementations that detect P2PDMA pages that the
underlying DMA device cannot access.

Signed-off-by: Logan Gunthorpe 
Reviewed-by: Jason Gunthorpe 
Reviewed-by: Christoph Hellwig 
Signed-off-by: Christoph Hellwig

swiotlb: clean up some coding style and minor issues

2022-07-22T15:20:56+00:00

- Fix the used field of struct io_tlb_area wasn't initialized
- Set area number to be 0 if input area number parameter is 0
- Use array_size() to calculate io_tlb_area array size
- Make parameters of swiotlb_do_find_slots() more reasonable

Fixes: 26ffb91fa5e0 ("swiotlb: split up the global swiotlb lock")
Signed-off-by: Tianyu Lan 
Reviewed-by: Michael Kelley 
Signed-off-by: Christoph Hellwig

dma-mapping: add dma_opt_mapping_size()

2022-07-19T04:05:41+00:00

Streaming DMA mapping involving an IOMMU may be much slower for larger
total mapping size. This is because every IOMMU DMA mapping requires an
IOVA to be allocated and freed. IOVA sizes above a certain limit are not
cached, which can have a big impact on DMA mapping performance.

Provide an API for device drivers to know this "optimal" limit, such that
they may try to produce mapping which don't exceed it.

Signed-off-by: John Garry 
Reviewed-by: Damien Le Moal 
Acked-by: Martin K. Petersen 
Signed-off-by: Christoph Hellwig

swiotlb: move struct io_tlb_slot to swiotlb.c

2022-07-18T04:50:18+00:00

No need to expose this structure definition in the header.

Signed-off-by: Christoph Hellwig