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Author SHA1 Message Date
Thomas Gleixner
e22b0d1bbf powerpc/pasemi/msi: Convert to msi_on_each_dec() 
Replace the about to vanish iterators and make use of the filtering.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211206210748.468512783@linutronix.de
 2021-12-16 22:22:18 +01:00
Thomas Gleixner
3c46658bd7 powerpc/cell/axon_msi: Convert to msi_on_each_desc() 
Replace the about to vanish iterators and make use of the filtering.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211206210748.414712173@linutronix.de
 2021-12-16 22:22:18 +01:00
Thomas Gleixner
85dabc2f72 powerpc/4xx/hsta: Rework MSI handling 
Replace the about to vanish iterators and make use of the filtering.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211206210748.359766435@linutronix.de
 2021-12-16 22:22:18 +01:00
Thomas Gleixner
2ca5e908d0 s390/pci: Rework MSI descriptor walk 
Replace the about to vanish iterators and make use of the filtering.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Niklas Schnelle <schnelle@linux.ibm.com>
Link: https://lore.kernel.org/r/20211206210748.305656158@linutronix.de
 2021-12-16 22:22:18 +01:00
Thomas Gleixner
3d31bbd39a xen/pcifront: Rework MSI handling 
Replace the about to vanish iterators.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211206210748.251752714@linutronix.de
 2021-12-16 22:22:18 +01:00
Thomas Gleixner
f2948df5f8 x86/pci/xen: Use msi_for_each_desc() 
Replace the about to vanish iterators.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211206210748.198359105@linutronix.de
 2021-12-16 22:22:18 +01:00
Thomas Gleixner
ae24e28fef PCI/MSI: Use msi_on_each_desc() 
Use the new iterator functions which pave the way for dynamically extending
MSI-X vectors.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20211206210748.142603657@linutronix.de
 2021-12-16 22:22:18 +01:00
Thomas Gleixner
9fb9eb4b59 PCI/MSI: Let core code free MSI descriptors 
Set the domain info flag which tells the core code to free the MSI
descriptors from msi_domain_free_irqs() and add an explicit call to the
core function into the legacy code.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20211206210748.089085131@linutronix.de
 2021-12-16 22:22:17 +01:00
Thomas Gleixner
71020a3c0d PCI/MSI: Use msi_add_msi_desc() 
Simplify the allocation of MSI descriptors by using msi_add_msi_desc()
which moves the storage handling to core code and prepares for dynamic
extension of the MSI-X vector space.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20211206210748.035348646@linutronix.de
 2021-12-16 22:22:17 +01:00
Thomas Gleixner
5512c5eaf5 PCI/MSI: Protect MSI operations 
To prepare for dynamic extension of MSI-X vectors, protect the MSI
operations for MSI and MSI-X. This requires to move the invocation of
irq_create_affinity_masks() out of the descriptor lock section to avoid
reverse lock ordering vs. CPU hotplug lock as some callers of the PCI/MSI
allocation interfaces already hold it.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20211206210747.982292705@linutronix.de
 2021-12-16 22:22:17 +01:00
Thomas Gleixner
645474e2ce genirq/msi: Provide domain flags to allocate/free MSI descriptors automatically 
Provide domain info flags which tell the core to allocate simple
descriptors or to free descriptors when the interrupts are freed and
implement the required functionality.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211206210747.928198636@linutronix.de
 2021-12-16 22:22:17 +01:00
Thomas Gleixner
6029052536 genirq/msi: Provide msi_alloc_msi_desc() and a simple allocator 
Provide msi_alloc_msi_desc() which takes a template MSI descriptor for
initializing a newly allocated descriptor. This allows to simplify various
usage sites of alloc_msi_entry() and moves the storage handling into the
core code.

For simple cases where only a linear vector space is required provide
msi_add_simple_msi_descs() which just allocates a linear range of MSI
descriptors and fills msi_desc::msi_index accordingly.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211206210747.873833567@linutronix.de
 2021-12-16 22:22:17 +01:00
Thomas Gleixner
1046f71d72 genirq/msi: Provide a set of advanced MSI accessors and iterators 
In preparation for dynamic handling of MSI-X interrupts provide a new set
of MSI descriptor accessor functions and iterators. They are benefitial per
se as they allow to cleanup quite some code in various MSI domain
implementations.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211206210747.818635078@linutronix.de
 2021-12-16 22:22:17 +01:00
Thomas Gleixner
0f62d941ac genirq/msi: Provide msi_domain_alloc/free_irqs_descs_locked() 
Usage sites which do allocations of the MSI descriptors before invoking
msi_domain_alloc_irqs() require to lock the MSI decriptors accross the
operation.

Provide entry points which can be called with the MSI mutex held and lock
the mutex in the existing entry points.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211206210747.765371053@linutronix.de
 2021-12-16 22:22:17 +01:00
Thomas Gleixner
b5f687f97d genirq/msi: Add mutex for MSI list protection 
For upcoming runtime extensions of MSI-X interrupts it's required to
protect the MSI descriptor list. Add a mutex to struct msi_device_data and
provide lock/unlock functions.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211206210747.708877269@linutronix.de
 2021-12-16 22:22:17 +01:00
Thomas Gleixner
125282cd4f genirq/msi: Move descriptor list to struct msi_device_data 
It's only required when MSI is in use.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211206210747.650487479@linutronix.de
 2021-12-16 22:22:16 +01:00
Thomas Gleixner
1900c962e2 dmaengine: qcom_hidma: Cleanup MSI handling 
There is no reason to walk the MSI descriptors to retrieve the interrupt
number for a device. Use msi_get_virq() instead.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Sinan Kaya <okaya@kernel.org>
Acked-by: Vinod Koul <vkoul@kernel.org>
Link: https://lore.kernel.org/r/20211210221815.329792721@linutronix.de
 2021-12-16 22:16:42 +01:00
Thomas Gleixner
89e0032ec2 soc: ti: ti_sci_inta_msi: Get rid of ti_sci_inta_msi_get_virq() 
Just use the core function msi_get_virq().

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Vinod Koul <vkoul@kernel.org>
Acked-by: Nishanth Menon <nm@ti.com>
Link: https://lore.kernel.org/r/20211210221815.269468319@linutronix.de
 2021-12-16 22:16:41 +01:00
Thomas Gleixner
d86a6d47bc bus: fsl-mc: fsl-mc-allocator: Rework MSI handling 
Storing a pointer to the MSI descriptor just to track the Linux interrupt
number is daft. Just store the interrupt number and be done with it.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221815.207838579@linutronix.de
 2021-12-16 22:16:41 +01:00
Thomas Gleixner
d722e9a511 mailbox: bcm-flexrm-mailbox: Rework MSI interrupt handling 
No point in retrieving the MSI descriptors. Just query the Linux interrupt
number.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221815.148331680@linutronix.de
 2021-12-16 22:16:41 +01:00
Thomas Gleixner
065afdc9c5 iommu/arm-smmu-v3: Use msi_get_virq() 
Let the core code fiddle with the MSI descriptor retrieval.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221815.089008198@linutronix.de
 2021-12-16 22:16:41 +01:00
Thomas Gleixner
8484567055 perf/smmuv3: Use msi_get_virq() 
Let the core code fiddle with the MSI descriptor retrieval.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221815.029143589@linutronix.de
 2021-12-16 22:16:41 +01:00
Thomas Gleixner
f6632bb2c1 dmaengine: mv_xor_v2: Get rid of msi_desc abuse 
Storing a pointer to the MSI descriptor just to keep track of the Linux
interrupt number is daft. Use msi_get_virq() instead.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Vinod Koul <vkoul@kernel.org>
Link: https://lore.kernel.org/r/20211210221814.970099984@linutronix.de
 2021-12-16 22:16:41 +01:00
Thomas Gleixner
f482359001 PCI/MSI: Simplify pci_irq_get_affinity() 
Replace open coded MSI descriptor chasing and use the proper accessor
functions instead.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221814.900929381@linutronix.de
 2021-12-16 22:16:41 +01:00
Thomas Gleixner
82ff8e6b78 PCI/MSI: Use msi_get_virq() in pci_get_vector() 
Use msi_get_vector() and handle the return value to be compatible.

No functional change intended.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221814.841243231@linutronix.de
 2021-12-16 22:16:41 +01:00
Thomas Gleixner
cf15f43aca genirq/msi: Provide interface to retrieve Linux interrupt number 
This allows drivers to retrieve the Linux interrupt number instead of
fiddling with MSI descriptors.

msi_get_virq() returns the Linux interrupt number or 0 in case that there
is no entry for the given MSI index.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221814.780824745@linutronix.de
 2021-12-16 22:16:40 +01:00
Thomas Gleixner
651b39c488 powerpc/pseries/msi: Let core code check for contiguous entries 
Set the domain info flag and remove the check.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221814.720998720@linutronix.de
 2021-12-16 22:16:40 +01:00
Thomas Gleixner
7a823443e9 PCI/MSI: Provide MSI_FLAG_MSIX_CONTIGUOUS 
Provide a domain info flag which makes the core code check for a contiguous
MSI-X index on allocation. That's simpler than checking it at some other
domain callback in architecture code.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20211210221814.662401116@linutronix.de
 2021-12-16 22:16:40 +01:00
Thomas Gleixner
173ffad79d PCI/MSI: Use msi_desc::msi_index 
The usage of msi_desc::pci::entry_nr is confusing at best. It's the index
into the MSI[X] descriptor table.

Use msi_desc::msi_index which is shared between all MSI incarnations
instead of having a PCI specific storage for no value.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20211210221814.602911509@linutronix.de
 2021-12-16 22:16:40 +01:00
Thomas Gleixner
0f18095871 soc: ti: ti_sci_inta_msi: Use msi_desc::msi_index 
Use the common msi_index member and get rid of the pointless wrapper struct.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Nishanth Menon <nm@ti.com>
Link: https://lore.kernel.org/r/20211210221814.540704224@linutronix.de
 2021-12-16 22:16:40 +01:00
Thomas Gleixner
78ee9fb4b8 bus: fsl-mc-msi: Use msi_desc::msi_index 
Use the common msi_index member and get rid of the pointless wrapper struct.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221814.477386185@linutronix.de
 2021-12-16 22:16:40 +01:00
Thomas Gleixner
dba27c7fa3 platform-msi: Use msi_desc::msi_index 
Use the common msi_index member and get rid of the pointless wrapper struct.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221814.413638645@linutronix.de
 2021-12-16 22:16:40 +01:00
Thomas Gleixner
20c6d424cf genirq/msi: Consolidate MSI descriptor data 
All non PCI/MSI usage variants have data structures in struct msi_desc with
only one member: xxx_index. PCI/MSI has a entry_nr member.

Add a common msi_index member to struct msi_desc so all implementations can
share it which allows further consolidation.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221814.350967317@linutronix.de
 2021-12-16 22:16:40 +01:00
Thomas Gleixner
fc22e7dbcd platform-msi: Store platform private data pointer in msi_device_data 
Storing the platform private data in a MSI descriptor is sloppy at
best. The data belongs to the device and not to the descriptor.
Add a pointer to struct msi_device_data and store the pointer there.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221814.287680528@linutronix.de
 2021-12-16 22:16:39 +01:00
Thomas Gleixner
9835cec6d5 platform-msi: Rename functions and clarify comments 
It's hard to distinguish what platform_msi_domain_alloc() and
platform_msi_domain_alloc_irqs() are about. Make the distinction more
explicit and add comments which explain the use cases properly.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221814.228706214@linutronix.de
 2021-12-16 22:16:39 +01:00
Thomas Gleixner
24cff375fd genirq/msi: Remove the original sysfs interfaces 
No more users. Refactor the core code accordingly and move the global
interface under CONFIG_PCI_MSI_ARCH_FALLBACKS.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221814.168362229@linutronix.de
 2021-12-16 22:16:39 +01:00
Thomas Gleixner
25ce693ef7 platform-msi: Let the core code handle sysfs groups 
Set the domain info flag and remove the local sysfs code.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221814.109408832@linutronix.de
 2021-12-16 22:16:39 +01:00
Thomas Gleixner
ffd84485e6 PCI/MSI: Let the irq code handle sysfs groups 
Set the domain info flag which makes the core code handle sysfs groups and
put an explicit invocation into the legacy code.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20211210221814.048612053@linutronix.de
 2021-12-16 22:16:39 +01:00
Thomas Gleixner
bf6e054e0e genirq/msi: Provide msi_device_populate/destroy_sysfs() 
Add new allocation functions which can be activated by domain info
flags. They store the groups pointer in struct msi_device_data.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221813.988659194@linutronix.de
 2021-12-16 22:16:39 +01:00
Thomas Gleixner
686073e9f8 soc: ti: ti_sci_inta_msi: Allocate MSI device data on first use 
Allocate the MSI device data on first invocation of the allocation function.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Nishanth Menon <nm@ti.com>
Link: https://lore.kernel.org/r/20211210221813.928842960@linutronix.de
 2021-12-16 22:16:39 +01:00
Thomas Gleixner
86ca622628 bus: fsl-mc-msi: Allocate MSI device data on first use 
Allocate the MSI device data on first invocation of the allocation function.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221813.867985931@linutronix.de
 2021-12-16 22:16:38 +01:00
Thomas Gleixner
077aeadb6c platform-msi: Allocate MSI device data on first use 
Allocate the MSI device data on first invocation of the allocation function
for platform MSI private data.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221813.805529729@linutronix.de
 2021-12-16 22:16:38 +01:00
Thomas Gleixner
93296cd132 PCI/MSI: Allocate MSI device data on first use 
Allocate MSI device data on first use, i.e. when a PCI driver invokes one
of the PCI/MSI enablement functions.

Add a wrapper function to ensure that the ordering vs. pcim_msi_release()
is correct.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/87r1adrdje.ffs@tglx
 2021-12-16 22:16:38 +01:00
Thomas Gleixner
3f35d2cf9f PCI/MSI: Decouple MSI[-X] disable from pcim_release() 
The MSI core will introduce runtime allocation of MSI related data. This
data will be devres managed and has to be set up before enabling
PCI/MSI[-X]. This would introduce an ordering issue vs. pcim_release().

The setup order is:

   pcim_enable_device()
	devres_alloc(pcim_release...);
	...
	pci_irq_alloc()
	  msi_setup_device_data()
	     devres_alloc(msi_device_data_release, ...)

and once the device is released these release functions are invoked in the
opposite order:

    msi_device_data_release()
    ...
    pcim_release()
       pci_disable_msi[x]()

which is obviously wrong, because pci_disable_msi[x]() requires the MSI
data to be available to tear down the MSI[-X] interrupts.

Remove the MSI[-X] teardown from pcim_release() and add an explicit action
to be installed on the attempt of enabling PCI/MSI[-X].

This allows the MSI core data allocation to be ordered correctly in a
subsequent step.

Reported-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/87tuf9rdoj.ffs@tglx
 2021-12-16 22:16:38 +01:00
Thomas Gleixner
013bd8e543 device: Add device:: Msi_data pointer and struct msi_device_data 
Create struct msi_device_data and add a pointer of that type to struct
dev_msi_info, which is part of struct device. Provide an allocator function
which can be invoked from the MSI interrupt allocation code pathes.

Add a properties field to the data structure as a first member so the
allocation size is not zero bytes. The field will be uses later on.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221813.676660809@linutronix.de
 2021-12-16 22:16:38 +01:00
Thomas Gleixner
34fff62827 device: Move MSI related data into a struct 
The only unconditional part of MSI data in struct device is the irqdomain
pointer. Everything else can be allocated on demand. Create a data
structure and move the irqdomain pointer into it. The other MSI specific
parts are going to be removed from struct device in later steps.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20211210221813.617178827@linutronix.de
 2021-12-16 22:16:38 +01:00
Thomas Gleixner
ed1533b581 powerpc/pseries/msi: Use PCI device properties 
instead of fiddling with MSI descriptors.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221813.556202506@linutronix.de
 2021-12-16 22:16:38 +01:00
Thomas Gleixner
d8a530578b powerpc/cell/axon_msi: Use PCI device property 
instead of fiddling with MSI descriptors.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20211210221813.493922179@linutronix.de
 2021-12-16 22:16:38 +01:00
Thomas Gleixner
6ef7f771de genirq/msi: Use PCI device property 
to determine whether this is MSI or MSIX instead of consulting MSI
descriptors.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221813.434156196@linutronix.de
 2021-12-16 22:16:37 +01:00
Thomas Gleixner
b3f8236411 x86/apic/msi: Use PCI device MSI property 
instead of fiddling with MSI descriptors.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221813.372357371@linutronix.de
 2021-12-16 22:16:37 +01:00