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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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c09fcc4b2b
With the msi_list and the msi_domain properties now being at the generic device level, it is starting to be relatively easy to offer a generic way of providing non-PCI MSIs. The two major hurdles with this idea are: - Lack of global ID that identifies a device: this is worked around by having a global ID allocator for each device that gets enrolled in the platform MSI subsystem - Lack of standard way to write the message in the generating device. This is solved by mandating driver code to provide a write_msg callback, so that everyone can have their own square wheel Apart from that, the API is fairly straightforward: - platform_msi_create_irq_domain creates an MSI domain that gets tagged with DOMAIN_BUS_PLATFORM_MSI - platform_msi_domain_alloc_irqs allocate MSIs for a given device, populating the msi_list - platform_msi_domain_free_irqs does what is written on the tin [ tglx: Created a seperate struct platform_msi_desc and added kerneldoc entries ] Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Yijing Wang <wangyijing@huawei.com> Cc: Ma Jun <majun258@huawei.com> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Duc Dang <dhdang@apm.com> Cc: Hanjun Guo <hanjun.guo@linaro.org> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Jason Cooper <jason@lakedaemon.net> Link: http://lkml.kernel.org/r/1438091186-10244-10-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de> |
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| asm-generic | ||
| clocksource | ||
| crypto | ||
| drm | ||
| dt-bindings | ||
| keys | ||
| kvm | ||
| linux | ||
| math-emu | ||
| media | ||
| memory | ||
| misc | ||
| net | ||
| pcmcia | ||
| ras | ||
| rdma | ||
| rxrpc | ||
| scsi | ||
| soc | ||
| sound | ||
| target | ||
| trace | ||
| uapi | ||
| video | ||
| xen | ||
| Kbuild | ||