Date: Sun, 6 May 2012 17:31:30 +0000 (UTC) From: Marcel Moolenaar <marcel@FreeBSD.org> To: src-committers@freebsd.org, svn-src-projects@freebsd.org Subject: svn commit: r235097 - in projects/altix2/sys: kern sys Message-ID: <201205061731.q46HVUGP024218@svn.freebsd.org>
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Author: marcel Date: Sun May 6 17:31:29 2012 New Revision: 235097 URL: http://svn.freebsd.org/changeset/base/235097 Log: Add device_get_busdma_tag() and device_set_busdma_tag() for 2 reasons: 1. It allows us to keep track of the tags that are being created for a device, and 2. It allows us to implement inheritance of constraints within newbus and without using bus_get_dma_tag() for now. These functions are in part the result of building busdma/mi alongside the existing bus_dma implementation. They may not stay. Modified: projects/altix2/sys/kern/subr_bus.c projects/altix2/sys/sys/bus.h Modified: projects/altix2/sys/kern/subr_bus.c ============================================================================== --- projects/altix2/sys/kern/subr_bus.c Sun May 6 16:41:27 2012 (r235096) +++ projects/altix2/sys/kern/subr_bus.c Sun May 6 17:31:29 2012 (r235097) @@ -134,6 +134,8 @@ struct device { void *ivars; /**< instance variables */ void *softc; /**< current driver's variables */ + void *busdma_tag; /**< first created DMA tag */ + struct sysctl_ctx_list sysctl_ctx; /**< state for sysctl variables */ struct sysctl_oid *sysctl_tree; /**< state for sysctl variables */ }; @@ -2259,6 +2261,15 @@ device_get_unit(device_t dev) } /** + * @brief Return the first DMA root tag created for the device + */ +void * +device_get_busdma_tag(device_t dev) +{ + return (dev->busdma_tag); +} + +/** * @brief Return the device's description string */ const char * @@ -2350,6 +2361,19 @@ device_set_desc_internal(device_t dev, c } /** + * @brief Set or replace the first DMA root tag + */ +void * +device_set_busdma_tag(device_t dev, void *tag) +{ + void *prev; + + prev = dev->busdma_tag; + dev->busdma_tag = tag; + return (prev); +} + +/** * @brief Set the device's description * * The value of @c desc should be a string constant that will not Modified: projects/altix2/sys/sys/bus.h ============================================================================== --- projects/altix2/sys/sys/bus.h Sun May 6 16:41:27 2012 (r235096) +++ projects/altix2/sys/sys/bus.h Sun May 6 17:31:29 2012 (r235097) @@ -432,6 +432,11 @@ void device_disable(device_t dev); void device_enable(device_t dev); device_t device_find_child(device_t dev, const char *classname, int unit); +/* + * XXX busdma/mi + * device_get_busdma_tag() returns a busdma_tag_t + */ +void *device_get_busdma_tag(device_t dev); const char *device_get_desc(device_t dev); devclass_t device_get_devclass(device_t dev); driver_t *device_get_driver(device_t dev); @@ -458,6 +463,12 @@ int device_probe_and_attach(device_t dev int device_probe_child(device_t bus, device_t dev); int device_quiesce(device_t dev); void device_quiet(device_t dev); +/* + * XXX busdma/mi + * device_set_busdma_tag() returns a busdma_tag_t + * The tag argument is of type busdma_tag_t as well. + */ +void *device_set_busdma_tag(device_t dev, void *tag); void device_set_desc(device_t dev, const char* desc); void device_set_desc_copy(device_t dev, const char* desc); int device_set_devclass(device_t dev, const char *classname);
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