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| /freebsd/sys/dev/intel/ |
| H A D | spi.h | diff 5adcec04b5abd4971f1678d6ee1369cc9ecaa90d Thu Aug 03 18:10:50 CEST 2023 Vladimir Kondratyev <wulf@FreeBSD.org> intelspi: Add support for ddb/kdb -compatible polled mode
Required for Apple and Microsoft -compatible HID-over-SPI drivers.
Most logic was already implemented in commit 3c0867343819
"spibus: extend API: add cs_delay ivar, KEEP_CS and NO_SLEEP flags".
It dissallowed driver sleeps in the interrupt context. This commit
extends this feature to handle ddb/kdb context with following:
- Skip driver locking if SPI functions were called from kdb/ddb.
- Reinitialize controller if kdb/ddb initiated SPI transfer has
interrupted another already running one. Does not work very
reliable yet.
Reviewed by: manu
Differential Revision: https://reviews.freebsd.org/D41247
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| H A D | spi.c | diff 5adcec04b5abd4971f1678d6ee1369cc9ecaa90d Thu Aug 03 18:10:50 CEST 2023 Vladimir Kondratyev <wulf@FreeBSD.org> intelspi: Add support for ddb/kdb -compatible polled mode
Required for Apple and Microsoft -compatible HID-over-SPI drivers.
Most logic was already implemented in commit 3c0867343819
"spibus: extend API: add cs_delay ivar, KEEP_CS and NO_SLEEP flags".
It dissallowed driver sleeps in the interrupt context. This commit
extends this feature to handle ddb/kdb context with following:
- Skip driver locking if SPI functions were called from kdb/ddb.
- Reinitialize controller if kdb/ddb initiated SPI transfer has
interrupted another already running one. Does not work very
reliable yet.
Reviewed by: manu
Differential Revision: https://reviews.freebsd.org/D41247
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