kernel/linux.git/drivers/base/platform-msi.c, branch v4.17.1

driver core: Remove redundant license text

2017-12-07T17:36:44+00:00

Now that the SPDX tag is in all driver core files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Cc: Johannes Berg Cc: "Luis R. Rodriguez" Signed-off-by: Greg Kroah-Hartman

driver core: add SPDX identifiers to all driver core files

2017-12-07T17:36:43+00:00

It's good to have SPDX identifiers in all files to make it easier to audit the kernel tree for correct licenses. Update the driver core files files with the correct SPDX license identifier based on the license text in the file itself. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This work is based on a script and data from Thomas Gleixner, Philippe Ombredanne, and Kate Stewart. Cc: Johannes Berg Cc: "Luis R. Rodriguez" Cc: William Breathitt Gray Cc: Thomas Gleixner Cc: Kate Stewart Cc: Philippe Ombredanne Signed-off-by: Greg Kroah-Hartman

irqchip/MSI: Use irq_domain_update_bus_token instead of an open coded access

2017-06-22T16:29:17+00:00

Now that we have irq_domain_update_bus_token(), switch everyone over to it. The debugfs code thanks you for your continued support. Signed-off-by: Marc Zyngier Signed-off-by: Thomas Gleixner

platform-msi: Make platform_msi_create_device_domain() ACPI aware

2017-04-07T09:52:19+00:00

The irqdomain creation that is carried out in: platform_msi_create_device_domain() relies on the fwnode_handle interrupt controller token to associate the interrupt controller with a specific irqdomain. Current code relies on the OF layer to retrieve a fwnode_handle for the device representing the interrupt controller from its device->of_node pointer. This makes platform_msi_create_device_domain() DT specific whilst it really is not because after the merge of commit f94277af03ea ("of/platform: Initialise dev->fwnode appropriately") the fwnode_handle can easily be retrieved from the dev->fwnode pointer in a firmware agnostic way. Update platform_msi_create_device_domain() to retrieve the interrupt controller fwnode_handle from the dev->fwnode pointer so that it can be used seamlessly in ACPI and DT systems. Signed-off-by: Hanjun Guo Signed-off-by: Lorenzo Pieralisi Tested-by: Ming Lei Tested-by: Wei Xu Cc: Greg KH Cc: Thomas Gleixner Signed-off-by: Marc Zyngier

irq/platform-msi: Fix comment about maximal MSIs

2017-01-17T08:53:14+00:00

Commit aff5e06b0dda ("irq/platform-MSI: Increase the maximum MSIs the MSI framework can support") increased the maximum MSIs to 2048. Fix the comment to reflect that. Signed-off-by: Matthias Brugger Cc: gregkh@linuxfoundation.org Cc: majun258@huawei.com Link: http://lkml.kernel.org/r/1484592500-15400-1-git-send-email-mbrugger@suse.com Signed-off-by: Thomas Gleixner

genirq/msi: Add cpumask allocation to alloc_msi_entry

2016-09-14T20:11:08+00:00

For irq spreading want to store affinity masks in the msi_entry. Add the infrastructure for it. We allocate an array of cpumasks with an array size of the number of used vectors in the entry, so we can hand in the information per linux interrupt later. As we hand in the number of used vectors, we assign them right away. Convert all the call sites. Signed-off-by: Thomas Gleixner Cc: axboe@fb.com Cc: keith.busch@intel.com Cc: agordeev@redhat.com Cc: linux-block@vger.kernel.org Cc: Christoph Hellwig Link: http://lkml.kernel.org/r/1473862739-15032-2-git-send-email-hch@lst.de

base: Export platform_msi_domain_[alloc,free]_irqs

2016-01-26T15:33:25+00:00

The new function platform_msi_domain_{alloc,free}_irqs are meant to be used in platform drivers, which can be built as modules. Therefore, it makes sense to export them to be used from kernel modules. Signed-off-by: Thomas Petazzoni Acked-by: Marc Zyngier Cc: Greg Kroah-Hartman Cc: Rob Herring Cc: Frank Rowand Cc: Grant Likely Cc: Jiang Liu Link: http://lkml.kernel.org/r/1453816347-32720-4-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner

irq/platform-MSI: Increase the maximum MSIs the MSI framework can support

2015-12-29T10:58:53+00:00

The current MSI framework can only support 256 platform MSIs. But on Hisilicon platform, some network related devices has about 500 wired interrupts. To support these devices and align with MSI-X increase the maximum to 2048 devices. Signed-off-by: Ma Jun Cc: Cc: Cc: Cc: Cc: Cc: Cc: Cc: Cc: Cc: Cc: Link: http://lkml.kernel.org/r/1450752442-9392-1-git-send-email-majun258@huawei.com Signed-off-by: Thomas Gleixner

platform-msi: Allow creation of a MSI-based stacked irq domain

2015-12-16T15:29:44+00:00

We almost have all the needed bits requiredable to create a irq domain on top of a MSI domain. For this, we enable a few things: - the virq is stored in the msi_desc - device, msi_alloc_info and domain-specific data are stored in the platform_priv_data structure - we introduce a new API for platform-msi: /* Create a MSI-based domain */ struct irq_domain * platform_msi_create_device_domain(struct device *dev, unsigned int nvec, irq_write_msi_msg_t write_msi_msg, const struct irq_domain_ops *ops, void *host_data); /* Allocate MSIs in an MSI domain */ int platform_msi_domain_alloc(struct irq_domain *domain, unsigned int virq, unsigned int nr_irqs); /* Free MSIs from an MSI domain */ void platform_msi_domain_free(struct irq_domain *domain, unsigned int virq, unsigned int nvec); /* Obtain the host data passed to platform_msi_create_device_domain */ void *platform_msi_get_host_data(struct irq_domain *domain); platform_msi_create_device_domain() is a hybrid of irqdomain creation and interrupt allocation, creating a domain backed by the MSIs associated to a device. IRQs can then be allocated in that domain using platform_msi_domain_alloc(). This now allows a wired irq to MSI bridge to be created. Signed-off-by: Marc Zyngier

platform-msi: Factor out allocation/free of private data

2015-12-16T15:29:44+00:00

As we're going to have multiple paths to allocate/free the platform-msi private data, factor this out into separate utility functions. Signed-off-by: Marc Zyngier