From d319a7cfd9d80a2e2359e978ba88991531312ee6 Mon Sep 17 00:00:00 2001 From: Arend van Spriel Date: Sat, 9 Jun 2012 22:51:43 +0200 Subject: [PATCH] brcmfmac: add debugfs helper functions This patch adds debugfs support to brcmfmac. It provide helper functions to setup the debugfs folder structure for the driver, which has following hierarchy: /brcmfmac// ie.: /sys/kernel/debug/brcmfmac/mmc0:0001:2/ The new source file provides functions to create and remove the two folders and a function to retrieve the device-specific folder so files can be created in it. Reviewed-by: Pieter-Paul Giesberts Reviewed-by: Franky (Zhenhui) Lin Signed-off-by: Arend van Spriel Signed-off-by: John W. Linville --- .../net/wireless/brcm80211/brcmfmac/Makefile | 2 + drivers/net/wireless/brcm80211/brcmfmac/dhd.h | 3 + .../net/wireless/brcm80211/brcmfmac/dhd_dbg.c | 63 +++++++++++++++++++ .../net/wireless/brcm80211/brcmfmac/dhd_dbg.h | 23 +++++++ .../wireless/brcm80211/brcmfmac/dhd_linux.c | 7 +++ 5 files changed, 98 insertions(+) create mode 100644 drivers/net/wireless/brcm80211/brcmfmac/dhd_dbg.c diff --git a/drivers/net/wireless/brcm80211/brcmfmac/Makefile b/drivers/net/wireless/brcm80211/brcmfmac/Makefile index abb48032753b..9d5170b6df50 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/Makefile +++ b/drivers/net/wireless/brcm80211/brcmfmac/Makefile @@ -34,3 +34,5 @@ brcmfmac-$(CONFIG_BRCMFMAC_SDIO) += \ sdio_chip.o brcmfmac-$(CONFIG_BRCMFMAC_USB) += \ usb.o +brcmfmac-$(CONFIG_BRCMDBG) += \ + dhd_dbg.o \ No newline at end of file diff --git a/drivers/net/wireless/brcm80211/brcmfmac/dhd.h b/drivers/net/wireless/brcm80211/brcmfmac/dhd.h index 9f637014486e..a11fe54f5950 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/dhd.h +++ b/drivers/net/wireless/brcm80211/brcmfmac/dhd.h @@ -613,6 +613,9 @@ struct brcmf_pub { struct work_struct multicast_work; u8 macvalue[ETH_ALEN]; atomic_t pend_8021x_cnt; +#ifdef DEBUG + struct dentry *dbgfs_dir; +#endif }; struct brcmf_if_event { diff --git a/drivers/net/wireless/brcm80211/brcmfmac/dhd_dbg.c b/drivers/net/wireless/brcm80211/brcmfmac/dhd_dbg.c new file mode 100644 index 000000000000..0a7a3d50df6e --- /dev/null +++ b/drivers/net/wireless/brcm80211/brcmfmac/dhd_dbg.c @@ -0,0 +1,63 @@ +/* + * Copyright (c) 2012 Broadcom Corporation + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY + * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION + * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN + * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ +#include +#include +#include +#include + +#include +#include +#include +#include "dhd.h" +#include "dhd_bus.h" + +static struct dentry *root_folder; + +void brcmf_debugfs_init(void) +{ + root_folder = debugfs_create_dir(KBUILD_MODNAME, NULL); + if (IS_ERR(root_folder)) + root_folder = NULL; +} + +void brcmf_debugfs_exit(void) +{ + if (!root_folder) + return; + + debugfs_remove_recursive(root_folder); + root_folder = NULL; +} + +int brcmf_debugfs_attach(struct brcmf_pub *drvr) +{ + if (!root_folder) + return -ENODEV; + + drvr->dbgfs_dir = debugfs_create_dir(dev_name(drvr->dev), root_folder); + return PTR_RET(drvr->dbgfs_dir); +} + +void brcmf_debugfs_detach(struct brcmf_pub *drvr) +{ + if (!IS_ERR_OR_NULL(drvr->dbgfs_dir)) + debugfs_remove_recursive(drvr->dbgfs_dir); +} + +struct dentry *brcmf_debugfs_get_devdir(struct brcmf_pub *drvr) +{ + return drvr->dbgfs_dir; +} diff --git a/drivers/net/wireless/brcm80211/brcmfmac/dhd_dbg.h b/drivers/net/wireless/brcm80211/brcmfmac/dhd_dbg.h index a2c4576cf9ff..0efb226030a4 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/dhd_dbg.h +++ b/drivers/net/wireless/brcm80211/brcmfmac/dhd_dbg.h @@ -76,4 +76,27 @@ do { \ extern int brcmf_msg_level; +struct brcmf_pub; +#ifdef DEBUG +void brcmf_debugfs_init(void); +void brcmf_debugfs_exit(void); +int brcmf_debugfs_attach(struct brcmf_pub *drvr); +void brcmf_debugfs_detach(struct brcmf_pub *drvr); +struct dentry *brcmf_debugfs_get_devdir(struct brcmf_pub *drvr); +#else +static inline void brcmf_debugfs_init(void) +{ +} +static inline void brcmf_debugfs_exit(void) +{ +} +static inline int brcmf_debugfs_attach(struct brcmf_pub *drvr) +{ + return 0; +} +static inline void brcmf_debugfs_detach(struct brcmf_pub *drvr) +{ +} +#endif + #endif /* _BRCMF_DBG_H_ */ diff --git a/drivers/net/wireless/brcm80211/brcmfmac/dhd_linux.c b/drivers/net/wireless/brcm80211/brcmfmac/dhd_linux.c index 8933f9b31a9a..01cf6c03390b 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/dhd_linux.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/dhd_linux.c @@ -1007,6 +1007,9 @@ int brcmf_attach(uint bus_hdrlen, struct device *dev) drvr->bus_if->drvr = drvr; drvr->dev = dev; + /* create device debugfs folder */ + brcmf_debugfs_attach(drvr); + /* Attach and link in the protocol */ ret = brcmf_proto_attach(drvr); if (ret != 0) { @@ -1123,6 +1126,7 @@ void brcmf_detach(struct device *dev) brcmf_proto_detach(drvr); } + brcmf_debugfs_detach(drvr); bus_if->drvr = NULL; kfree(drvr); } @@ -1192,6 +1196,8 @@ exit: static void brcmf_driver_init(struct work_struct *work) { + brcmf_debugfs_init(); + #ifdef CONFIG_BRCMFMAC_SDIO brcmf_sdio_init(); #endif @@ -1219,6 +1225,7 @@ static void __exit brcmfmac_module_exit(void) #ifdef CONFIG_BRCMFMAC_USB brcmf_usb_exit(); #endif + brcmf_debugfs_exit(); } module_init(brcmfmac_module_init); -- 2.20.1