From 8813d1c00ca923c1683da625ff85959be1db9a49 Mon Sep 17 00:00:00 2001 From: James Bottomley Date: Wed, 9 May 2007 02:33:30 -0700 Subject: [PATCH] mca: add integrated device bus matching The MCA bus has a few "integrated" functions, which are effectively virtual slots on the bus. The problem is that these special functions don't have dedicated pos IDs, so we have to manufacture ids for them outside the pos space ... and these ids can't be matched by the standard matching function, so add a special registration that requests a list of pos ids or a particular integrated function. Signed-off-by: James Bottomley Signed-off-by: Linus Torvalds --- drivers/mca/mca-bus.c | 26 ++++++++++++++++---------- drivers/mca/mca-driver.c | 13 +++++++++++++ include/linux/mca.h | 2 ++ 3 files changed, 31 insertions(+), 10 deletions(-) diff --git a/drivers/mca/mca-bus.c b/drivers/mca/mca-bus.c index a70fe00aea16..67b8e9453b19 100644 --- a/drivers/mca/mca-bus.c +++ b/drivers/mca/mca-bus.c @@ -48,18 +48,24 @@ static int mca_bus_match (struct device *dev, struct device_driver *drv) struct mca_device *mca_dev = to_mca_device (dev); struct mca_driver *mca_drv = to_mca_driver (drv); const unsigned short *mca_ids = mca_drv->id_table; - int i; - - if (!mca_ids) - return 0; - - for(i = 0; mca_ids[i]; i++) { - if (mca_ids[i] == mca_dev->pos_id) { - mca_dev->index = i; - return 1; + int i = 0; + + if (mca_ids) { + for(i = 0; mca_ids[i]; i++) { + if (mca_ids[i] == mca_dev->pos_id) { + mca_dev->index = i; + return 1; + } } } - + /* If the integrated id is present, treat it as though it were an + * additional id in the id_table (it can't be because by definition, + * integrated id's overflow a short */ + if (mca_drv->integrated_id && mca_dev->pos_id == + mca_drv->integrated_id) { + mca_dev->index = i; + return 1; + } return 0; } diff --git a/drivers/mca/mca-driver.c b/drivers/mca/mca-driver.c index 2223466b3d8a..32cd39bcc715 100644 --- a/drivers/mca/mca-driver.c +++ b/drivers/mca/mca-driver.c @@ -36,12 +36,25 @@ int mca_register_driver(struct mca_driver *mca_drv) mca_drv->driver.bus = &mca_bus_type; if ((r = driver_register(&mca_drv->driver)) < 0) return r; + mca_drv->integrated_id = 0; } return 0; } EXPORT_SYMBOL(mca_register_driver); +int mca_register_driver_integrated(struct mca_driver *mca_driver, + int integrated_id) +{ + int r = mca_register_driver(mca_driver); + + if (!r) + mca_driver->integrated_id = integrated_id; + + return r; +} +EXPORT_SYMBOL(mca_register_driver_integrated); + void mca_unregister_driver(struct mca_driver *mca_drv) { if (MCA_bus) diff --git a/include/linux/mca.h b/include/linux/mca.h index 5cff2923092b..37972704617f 100644 --- a/include/linux/mca.h +++ b/include/linux/mca.h @@ -94,6 +94,7 @@ struct mca_bus { struct mca_driver { const short *id_table; void *driver_data; + int integrated_id; struct device_driver driver; }; #define to_mca_driver(mdriver) container_of(mdriver, struct mca_driver, driver) @@ -125,6 +126,7 @@ extern enum MCA_AdapterStatus mca_device_status(struct mca_device *mca_dev); extern struct bus_type mca_bus_type; extern int mca_register_driver(struct mca_driver *drv); +extern int mca_register_driver_integrated(struct mca_driver *, int); extern void mca_unregister_driver(struct mca_driver *drv); /* WARNING: only called by the boot time device setup */ -- 2.20.1