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| author | Davidlohr Bueso <dave@stgolabs.net> | 2023-01-17 21:53:37 -0800 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2023-01-26 16:51:07 -0800 |
| commit | a49aa8141b657a7fd33d86f7bed3ca07567ab37a (patch) | |
| tree | 19536dda79e3d8112afb6bafd6ec6e6a81e48c9d /drivers/cxl/cxlmem.h | |
| parent | 6ebe28f9ec7228e1a35df6074695ac11d7cdcf68 (diff) | |
| download | linux-stable-a49aa8141b657a7fd33d86f7bed3ca07567ab37a.tar.gz linux-stable-a49aa8141b657a7fd33d86f7bed3ca07567ab37a.tar.bz2 linux-stable-a49aa8141b657a7fd33d86f7bed3ca07567ab37a.zip | |
cxl/mem: Wire up event interrupts
Currently the only CXL features targeted for irq support require their
message numbers to be within the first 16 entries. The device may
however support less than 16 entries depending on the support it
provides.
Attempt to allocate these 16 irq vectors. If the device supports less
then the PCI infrastructure will allocate that number. Upon successful
allocation, users can plug in their respective isr at any point
thereafter.
CXL device events are signaled via interrupts. Each event log may have
a different interrupt message number. These message numbers are
reported in the Get Event Interrupt Policy mailbox command.
Add interrupt support for event logs. Interrupts are allocated as
shared interrupts. Therefore, all or some event logs can share the same
message number.
In addition all logs are queried on any interrupt in order of the most
to least severe based on the status register.
Finally place all event configuration logic into cxl_event_config().
Previously the logic was a simple 'read all' on start up. But
interrupts must be configured prior to any reads to ensure no events are
missed. A single event configuration function results in a cleaner over
all implementation.
Cc: Bjorn Helgaas <helgaas@kernel.org>
Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Co-developed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Davidlohr Bueso <dave@stgolabs.net>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Link: https://lore.kernel.org/r/20221216-cxl-ev-log-v7-2-2316a5c8f7d8@intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/cxl/cxlmem.h')
| -rw-r--r-- | drivers/cxl/cxlmem.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h index b74013a5f528..c7db2fa4d7a4 100644 --- a/drivers/cxl/cxlmem.h +++ b/drivers/cxl/cxlmem.h @@ -195,6 +195,23 @@ struct cxl_endpoint_dvsec_info { }; /** + * Event Interrupt Policy + * + * CXL rev 3.0 section 8.2.9.2.4; Table 8-52 + */ +enum cxl_event_int_mode { + CXL_INT_NONE = 0x00, + CXL_INT_MSI_MSIX = 0x01, + CXL_INT_FW = 0x02 +}; +struct cxl_event_interrupt_policy { + u8 info_settings; + u8 warn_settings; + u8 failure_settings; + u8 fatal_settings; +} __packed; + +/** * struct cxl_event_state - Event log driver state * * @event_buf: Buffer to receive event data @@ -288,6 +305,8 @@ enum cxl_opcode { CXL_MBOX_OP_RAW = CXL_MBOX_OP_INVALID, CXL_MBOX_OP_GET_EVENT_RECORD = 0x0100, CXL_MBOX_OP_CLEAR_EVENT_RECORD = 0x0101, + CXL_MBOX_OP_GET_EVT_INT_POLICY = 0x0102, + CXL_MBOX_OP_SET_EVT_INT_POLICY = 0x0103, CXL_MBOX_OP_GET_FW_INFO = 0x0200, CXL_MBOX_OP_ACTIVATE_FW = 0x0202, CXL_MBOX_OP_GET_SUPPORTED_LOGS = 0x0400, |