Ben Widawsky 229e8828c2 cxl/pci: Implement Interface Ready Timeout ... The original driver implementation used the doorbell timeout for the Mailbox Interface Ready bit to piggy back off of, since the latter does not have a defined timeout. This functionality, introduced in commit 8adaf747c9 ("cxl/mem: Find device capabilities"), needs improvement as the recent "Add Mailbox Ready Time" ECN timeout indicates that the mailbox ready time can be significantly longer that 2 seconds. While the specification limits the maximum timeout to 256s, the cxl_pci driver gives up on the mailbox after 60s. This value corresponds with important timeout values already present in the kernel. A module parameter is provided as an emergency override and represents the default Linux policy for all devices. Signed-off-by: Ben Widawsky <ben.widawsky@intel.com> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> [djbw: add modparam, drop check_device_status()] Co-developed-by: Dan Williams <dan.j.williams@intel.com> Link: https://lore.kernel.org/r/164367306565.208548.1932299464604450843.stgit@dwillia2-desk3.amr.corp.intel.com Signed-off-by: Dan Williams <dan.j.williams@intel.com>		2022-02-08 22:57:27 -08:00
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core	cxl/core: Remove cxld_const_init in cxl_decoder_alloc()	2022-01-04 17:29:31 -08:00
Kconfig	cxl: Rename CXL_MEM to CXL_PCI	2022-02-08 22:57:27 -08:00
Makefile	cxl: Rename CXL_MEM to CXL_PCI	2022-02-08 22:57:27 -08:00
acpi.c	ACPI: NUMA: Add a node and memblk for each CFMWS not in SRAT	2021-11-15 11:03:00 -08:00
cxl.h	cxl/core: Remove cxld_const_init in cxl_decoder_alloc()	2022-01-04 17:29:31 -08:00
cxlmem.h	cxl/memdev: Remove unused cxlmd field	2021-11-15 11:02:59 -08:00
pci.c	cxl/pci: Implement Interface Ready Timeout	2022-02-08 22:57:27 -08:00
pci.h	cxl/pci: Convert register block identifiers to an enum	2021-10-29 11:53:51 -07:00
pmem.c	cxl/pmem: Fix module reload vs workqueue state	2021-11-15 11:03:00 -08:00