From: Alexandre Bounine Date: Wed, 3 Jul 2013 22:08:58 +0000 (-0700) Subject: rapidio: add udev notification X-Git-Tag: firefly_0821_release~176^2~5786^2~25 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=3bdbb62fe97537252b22f700009863eeb51aa750;p=firefly-linux-kernel-4.4.55.git rapidio: add udev notification Add RapidIO-specific modalias generation to enable udev notifications about RapidIO-specific events. The RapidIO modalias string format is shown below: "rapidio:vNNNNdNNNNavNNNNadNNNN" Where: v - Device Vendor ID (16 bit), d - Device ID (16 bit), av - Assembly Vendor ID (16 bit), ad - Assembly ID (16 bit), as they are reported in corresponding Capability Registers (CARs) of each RapidIO device. Signed-off-by: Alexandre Bounine Cc: Matt Porter Cc: Li Yang Cc: Kumar Gala Cc: Andre van Herk Cc: Micha Nelissen Cc: Stef van Os Cc: Jean Delvare Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/drivers/rapidio/rio-driver.c b/drivers/rapidio/rio-driver.c index a0c875563d76..3e9b6a78ad18 100644 --- a/drivers/rapidio/rio-driver.c +++ b/drivers/rapidio/rio-driver.c @@ -199,6 +199,23 @@ static int rio_match_bus(struct device *dev, struct device_driver *drv) out:return 0; } +static int rio_uevent(struct device *dev, struct kobj_uevent_env *env) +{ + struct rio_dev *rdev; + + if (!dev) + return -ENODEV; + + rdev = to_rio_dev(dev); + if (!rdev) + return -ENODEV; + + if (add_uevent_var(env, "MODALIAS=rapidio:v%04Xd%04Xav%04Xad%04X", + rdev->vid, rdev->did, rdev->asm_vid, rdev->asm_did)) + return -ENOMEM; + return 0; +} + struct device rio_bus = { .init_name = "rapidio", }; @@ -210,6 +227,7 @@ struct bus_type rio_bus_type = { .bus_attrs = rio_bus_attrs, .probe = rio_device_probe, .remove = rio_device_remove, + .uevent = rio_uevent, }; /** diff --git a/drivers/rapidio/rio-sysfs.c b/drivers/rapidio/rio-sysfs.c index 0c4473e54f86..9331be646dc3 100644 --- a/drivers/rapidio/rio-sysfs.c +++ b/drivers/rapidio/rio-sysfs.c @@ -84,6 +84,15 @@ static ssize_t lnext_show(struct device *dev, return str - buf; } +static ssize_t modalias_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct rio_dev *rdev = to_rio_dev(dev); + + return sprintf(buf, "rapidio:v%04Xd%04Xav%04Xad%04X\n", + rdev->vid, rdev->did, rdev->asm_vid, rdev->asm_did); +} + struct device_attribute rio_dev_attrs[] = { __ATTR_RO(did), __ATTR_RO(vid), @@ -93,6 +102,7 @@ struct device_attribute rio_dev_attrs[] = { __ATTR_RO(asm_rev), __ATTR_RO(lprev), __ATTR_RO(destid), + __ATTR_RO(modalias), __ATTR_NULL, }; diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h index b3bd7e737e8b..b62d4af6c667 100644 --- a/include/linux/mod_devicetable.h +++ b/include/linux/mod_devicetable.h @@ -579,4 +579,23 @@ struct mei_cl_device_id { kernel_ulong_t driver_info; }; +/* RapidIO */ + +#define RIO_ANY_ID 0xffff + +/** + * struct rio_device_id - RIO device identifier + * @did: RapidIO device ID + * @vid: RapidIO vendor ID + * @asm_did: RapidIO assembly device ID + * @asm_vid: RapidIO assembly vendor ID + * + * Identifies a RapidIO device based on both the device/vendor IDs and + * the assembly device/vendor IDs. + */ +struct rio_device_id { + __u16 did, vid; + __u16 asm_did, asm_vid; +}; + #endif /* LINUX_MOD_DEVICETABLE_H */ diff --git a/include/linux/rio.h b/include/linux/rio.h index 8d3db1b7b998..e2faf7b8fe80 100644 --- a/include/linux/rio.h +++ b/include/linux/rio.h @@ -20,6 +20,7 @@ #include #include #include +#include #ifdef CONFIG_RAPIDIO_DMA_ENGINE #include #endif @@ -396,21 +397,6 @@ struct rio_driver { #define to_rio_driver(drv) container_of(drv,struct rio_driver, driver) -/** - * struct rio_device_id - RIO device identifier - * @did: RIO device ID - * @vid: RIO vendor ID - * @asm_did: RIO assembly device ID - * @asm_vid: RIO assembly vendor ID - * - * Identifies a RIO device based on both the device/vendor IDs and - * the assembly device/vendor IDs. - */ -struct rio_device_id { - u16 did, vid; - u16 asm_did, asm_vid; -}; - union rio_pw_msg { struct { u32 comptag; /* Component Tag CSR */ diff --git a/include/linux/rio_ids.h b/include/linux/rio_ids.h index b66d13d1bdc0..2543bc163d54 100644 --- a/include/linux/rio_ids.h +++ b/include/linux/rio_ids.h @@ -13,8 +13,6 @@ #ifndef LINUX_RIO_IDS_H #define LINUX_RIO_IDS_H -#define RIO_ANY_ID 0xffff - #define RIO_VID_FREESCALE 0x0002 #define RIO_DID_MPC8560 0x0003 diff --git a/scripts/mod/devicetable-offsets.c b/scripts/mod/devicetable-offsets.c index e66d4d258e1a..bb5d115ca671 100644 --- a/scripts/mod/devicetable-offsets.c +++ b/scripts/mod/devicetable-offsets.c @@ -177,5 +177,11 @@ int main(void) DEVID(mei_cl_device_id); DEVID_FIELD(mei_cl_device_id, name); + DEVID(rio_device_id); + DEVID_FIELD(rio_device_id, did); + DEVID_FIELD(rio_device_id, vid); + DEVID_FIELD(rio_device_id, asm_did); + DEVID_FIELD(rio_device_id, asm_vid); + return 0; } diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c index 45f9a3377dcd..d9e67b719f08 100644 --- a/scripts/mod/file2alias.c +++ b/scripts/mod/file2alias.c @@ -1145,6 +1145,26 @@ static int do_mei_entry(const char *filename, void *symval, } ADD_TO_DEVTABLE("mei", mei_cl_device_id, do_mei_entry); +/* Looks like: rapidio:vNdNavNadN */ +static int do_rio_entry(const char *filename, + void *symval, char *alias) +{ + DEF_FIELD(symval, rio_device_id, did); + DEF_FIELD(symval, rio_device_id, vid); + DEF_FIELD(symval, rio_device_id, asm_did); + DEF_FIELD(symval, rio_device_id, asm_vid); + + strcpy(alias, "rapidio:"); + ADD(alias, "v", vid != RIO_ANY_ID, vid); + ADD(alias, "d", did != RIO_ANY_ID, did); + ADD(alias, "av", asm_vid != RIO_ANY_ID, asm_vid); + ADD(alias, "ad", asm_did != RIO_ANY_ID, asm_did); + + add_wildcard(alias); + return 1; +} +ADD_TO_DEVTABLE("rapidio", rio_device_id, do_rio_entry); + /* Does namelen bytes of name exactly match the symbol? */ static bool sym_is(const char *name, unsigned namelen, const char *symbol) {