diff options
Diffstat (limited to 'patches.tizen/1140-usb-gadget-f_mass_storage-add-configfs-support.patch')
| -rw-r--r-- | patches.tizen/1140-usb-gadget-f_mass_storage-add-configfs-support.patch | 526 |
1 files changed, 526 insertions, 0 deletions
diff --git a/patches.tizen/1140-usb-gadget-f_mass_storage-add-configfs-support.patch b/patches.tizen/1140-usb-gadget-f_mass_storage-add-configfs-support.patch new file mode 100644 index 00000000000..ef55e17d6f7 --- /dev/null +++ b/patches.tizen/1140-usb-gadget-f_mass_storage-add-configfs-support.patch @@ -0,0 +1,526 @@ +From 8fc023846b2c3d6d8c779ebd9ed354e518d42b1d Mon Sep 17 00:00:00 2001 +From: Andrzej Pietrasiewicz <andrzej.p@samsung.com> +Date: Wed, 9 Oct 2013 10:06:05 +0200 +Subject: [PATCH 1140/1302] usb: gadget: f_mass_storage: add configfs support + +From this commit on f_mass_storage is available through configfs. + +Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> +Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> +Signed-off-by: Felipe Balbi <balbi@ti.com> +Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com> +--- + .../ABI/testing/configfs-usb-gadget-mass-storage | 31 ++ + drivers/usb/gadget/Kconfig | 11 + + drivers/usb/gadget/f_mass_storage.c | 360 +++++++++++++++++++++ + drivers/usb/gadget/f_mass_storage.h | 17 + + 4 files changed, 419 insertions(+) + create mode 100644 Documentation/ABI/testing/configfs-usb-gadget-mass-storage + +diff --git a/Documentation/ABI/testing/configfs-usb-gadget-mass-storage b/Documentation/ABI/testing/configfs-usb-gadget-mass-storage +new file mode 100644 +index 0000000..ad72a37 +--- /dev/null ++++ b/Documentation/ABI/testing/configfs-usb-gadget-mass-storage +@@ -0,0 +1,31 @@ ++What: /config/usb-gadget/gadget/functions/mass_storage.name ++Date: Oct 2013 ++KenelVersion: 3.13 ++Description: ++ The attributes: ++ ++ stall - Set to permit function to halt bulk endpoints. ++ Disabled on some USB devices known not to work ++ correctly. You should set it to true. ++ num_buffers - Number of pipeline buffers. Valid numbers ++ are 2..4. Available only if ++ CONFIG_USB_GADGET_DEBUG_FILES is set. ++ ++What: /config/usb-gadget/gadget/functions/mass_storage.name/lun.name ++Date: Oct 2013 ++KenelVersion: 3.13 ++Description: ++ The attributes: ++ ++ file - The path to the backing file for the LUN. ++ Required if LUN is not marked as removable. ++ ro - Flag specifying access to the LUN shall be ++ read-only. This is implied if CD-ROM emulation ++ is enabled as well as when it was impossible ++ to open "filename" in R/W mode. ++ removable - Flag specifying that LUN shall be indicated as ++ being removable. ++ cdrom - Flag specifying that LUN shall be reported as ++ being a CD-ROM. ++ nofua - Flag specifying that FUA flag ++ in SCSI WRITE(10,12) +diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig +index 6214b79..bef6e86 100644 +--- a/drivers/usb/gadget/Kconfig ++++ b/drivers/usb/gadget/Kconfig +@@ -680,6 +680,17 @@ config USB_CONFIGFS_PHONET + help + The Phonet protocol implementation for USB device. + ++config USB_CONFIGFS_MASS_STORAGE ++ boolean "Mass storage" ++ depends on USB_CONFIGFS ++ select USB_U_MS ++ select USB_F_MASS_STORAGE ++ help ++ The Mass Storage Gadget acts as a USB Mass Storage disk drive. ++ As its storage repository it can use a regular file or a block ++ device (in much the same way as the "loop" device driver), ++ specified as a module parameter or sysfs option. ++ + config USB_ZERO + tristate "Gadget Zero (DEVELOPMENT)" + select USB_LIBCOMPOSITE +diff --git a/drivers/usb/gadget/f_mass_storage.c b/drivers/usb/gadget/f_mass_storage.c +index d80be5f..00d3687 100644 +--- a/drivers/usb/gadget/f_mass_storage.c ++++ b/drivers/usb/gadget/f_mass_storage.c +@@ -220,6 +220,7 @@ + #include <linux/usb/composite.h> + + #include "gadget_chips.h" ++#include "configfs.h" + + + /*------------------------------------------------------------------------*/ +@@ -3295,6 +3296,342 @@ static int fsg_bind_config(struct usb_composite_dev *cdev, + + #else + ++static inline struct fsg_lun_opts *to_fsg_lun_opts(struct config_item *item) ++{ ++ return container_of(to_config_group(item), struct fsg_lun_opts, group); ++} ++ ++static inline struct fsg_opts *to_fsg_opts(struct config_item *item) ++{ ++ return container_of(to_config_group(item), struct fsg_opts, ++ func_inst.group); ++} ++ ++CONFIGFS_ATTR_STRUCT(fsg_lun_opts); ++CONFIGFS_ATTR_OPS(fsg_lun_opts); ++ ++static void fsg_lun_attr_release(struct config_item *item) ++{ ++ struct fsg_lun_opts *lun_opts; ++ ++ lun_opts = to_fsg_lun_opts(item); ++ kfree(lun_opts); ++} ++ ++static struct configfs_item_operations fsg_lun_item_ops = { ++ .release = fsg_lun_attr_release, ++ .show_attribute = fsg_lun_opts_attr_show, ++ .store_attribute = fsg_lun_opts_attr_store, ++}; ++ ++static ssize_t fsg_lun_opts_file_show(struct fsg_lun_opts *opts, char *page) ++{ ++ struct fsg_opts *fsg_opts; ++ ++ fsg_opts = to_fsg_opts(opts->group.cg_item.ci_parent); ++ ++ return fsg_show_file(opts->lun, &fsg_opts->common->filesem, page); ++} ++ ++static ssize_t fsg_lun_opts_file_store(struct fsg_lun_opts *opts, ++ const char *page, size_t len) ++{ ++ struct fsg_opts *fsg_opts; ++ ++ fsg_opts = to_fsg_opts(opts->group.cg_item.ci_parent); ++ ++ return fsg_store_file(opts->lun, &fsg_opts->common->filesem, page, len); ++} ++ ++static struct fsg_lun_opts_attribute fsg_lun_opts_file = ++ __CONFIGFS_ATTR(file, S_IRUGO | S_IWUSR, fsg_lun_opts_file_show, ++ fsg_lun_opts_file_store); ++ ++static ssize_t fsg_lun_opts_ro_show(struct fsg_lun_opts *opts, char *page) ++{ ++ return fsg_show_ro(opts->lun, page); ++} ++ ++static ssize_t fsg_lun_opts_ro_store(struct fsg_lun_opts *opts, ++ const char *page, size_t len) ++{ ++ struct fsg_opts *fsg_opts; ++ ++ fsg_opts = to_fsg_opts(opts->group.cg_item.ci_parent); ++ ++ return fsg_store_ro(opts->lun, &fsg_opts->common->filesem, page, len); ++} ++ ++static struct fsg_lun_opts_attribute fsg_lun_opts_ro = ++ __CONFIGFS_ATTR(ro, S_IRUGO | S_IWUSR, fsg_lun_opts_ro_show, ++ fsg_lun_opts_ro_store); ++ ++static ssize_t fsg_lun_opts_removable_show(struct fsg_lun_opts *opts, ++ char *page) ++{ ++ return fsg_show_removable(opts->lun, page); ++} ++ ++static ssize_t fsg_lun_opts_removable_store(struct fsg_lun_opts *opts, ++ const char *page, size_t len) ++{ ++ return fsg_store_removable(opts->lun, page, len); ++} ++ ++static struct fsg_lun_opts_attribute fsg_lun_opts_removable = ++ __CONFIGFS_ATTR(removable, S_IRUGO | S_IWUSR, ++ fsg_lun_opts_removable_show, ++ fsg_lun_opts_removable_store); ++ ++static ssize_t fsg_lun_opts_cdrom_show(struct fsg_lun_opts *opts, char *page) ++{ ++ return fsg_show_cdrom(opts->lun, page); ++} ++ ++static ssize_t fsg_lun_opts_cdrom_store(struct fsg_lun_opts *opts, ++ const char *page, size_t len) ++{ ++ return fsg_store_cdrom(opts->lun, page, len); ++} ++ ++static struct fsg_lun_opts_attribute fsg_lun_opts_cdrom = ++ __CONFIGFS_ATTR(cdrom, S_IRUGO | S_IWUSR, fsg_lun_opts_cdrom_show, ++ fsg_lun_opts_cdrom_store); ++ ++static ssize_t fsg_lun_opts_nofua_show(struct fsg_lun_opts *opts, char *page) ++{ ++ return fsg_show_nofua(opts->lun, page); ++} ++ ++static ssize_t fsg_lun_opts_nofua_store(struct fsg_lun_opts *opts, ++ const char *page, size_t len) ++{ ++ return fsg_store_nofua(opts->lun, page, len); ++} ++ ++static struct fsg_lun_opts_attribute fsg_lun_opts_nofua = ++ __CONFIGFS_ATTR(nofua, S_IRUGO | S_IWUSR, fsg_lun_opts_nofua_show, ++ fsg_lun_opts_nofua_store); ++ ++static struct configfs_attribute *fsg_lun_attrs[] = { ++ &fsg_lun_opts_file.attr, ++ &fsg_lun_opts_ro.attr, ++ &fsg_lun_opts_removable.attr, ++ &fsg_lun_opts_cdrom.attr, ++ &fsg_lun_opts_nofua.attr, ++ NULL, ++}; ++ ++static struct config_item_type fsg_lun_type = { ++ .ct_item_ops = &fsg_lun_item_ops, ++ .ct_attrs = fsg_lun_attrs, ++ .ct_owner = THIS_MODULE, ++}; ++ ++#define MAX_NAME_LEN 40 ++ ++static struct config_group *fsg_lun_make(struct config_group *group, ++ const char *name) ++{ ++ struct fsg_lun_opts *opts; ++ struct fsg_opts *fsg_opts; ++ struct fsg_lun_config config; ++ char *num_str; ++ u8 num; ++ int ret; ++ ++ num_str = strchr(name, '.'); ++ if (!num_str) { ++ pr_err("Unable to locate . in LUN.NUMBER\n"); ++ return ERR_PTR(-EINVAL); ++ } ++ num_str++; ++ ++ ret = kstrtou8(num_str, 0, &num); ++ if (ret) ++ return ERR_PTR(ret); ++ ++ fsg_opts = to_fsg_opts(&group->cg_item); ++ if (num >= FSG_MAX_LUNS) ++ return ERR_PTR(-ENODEV); ++ mutex_lock(&fsg_opts->lock); ++ if (fsg_opts->refcnt || fsg_opts->common->luns[num]) { ++ ret = -EBUSY; ++ goto out; ++ } ++ ++ opts = kzalloc(sizeof(*opts), GFP_KERNEL); ++ if (!opts) { ++ ret = -ENOMEM; ++ goto out; ++ } ++ ++ memset(&config, 0, sizeof(config)); ++ config.removable = true; ++ ++ ++ ret = fsg_common_create_lun(fsg_opts->common, &config, num, name, ++ (const char **)&group->cg_item.ci_name); ++ if (ret) { ++ kfree(opts); ++ goto out; ++ } ++ opts->lun = fsg_opts->common->luns[num]; ++ opts->lun_id = num; ++ mutex_unlock(&fsg_opts->lock); ++ ++ config_group_init_type_name(&opts->group, name, &fsg_lun_type); ++ ++ return &opts->group; ++out: ++ mutex_unlock(&fsg_opts->lock); ++ return ERR_PTR(ret); ++} ++ ++static void fsg_lun_drop(struct config_group *group, struct config_item *item) ++{ ++ struct fsg_lun_opts *lun_opts; ++ struct fsg_opts *fsg_opts; ++ ++ lun_opts = to_fsg_lun_opts(item); ++ fsg_opts = to_fsg_opts(&group->cg_item); ++ ++ mutex_lock(&fsg_opts->lock); ++ if (fsg_opts->refcnt) { ++ struct config_item *gadget; ++ ++ gadget = group->cg_item.ci_parent->ci_parent; ++ unregister_gadget_item(gadget); ++ } ++ ++ fsg_common_remove_lun(lun_opts->lun, fsg_opts->common->sysfs); ++ fsg_opts->common->luns[lun_opts->lun_id] = NULL; ++ lun_opts->lun_id = 0; ++ mutex_unlock(&fsg_opts->lock); ++ ++ config_item_put(item); ++} ++ ++CONFIGFS_ATTR_STRUCT(fsg_opts); ++CONFIGFS_ATTR_OPS(fsg_opts); ++ ++static void fsg_attr_release(struct config_item *item) ++{ ++ struct fsg_opts *opts = to_fsg_opts(item); ++ ++ usb_put_function_instance(&opts->func_inst); ++} ++ ++static struct configfs_item_operations fsg_item_ops = { ++ .release = fsg_attr_release, ++ .show_attribute = fsg_opts_attr_show, ++ .store_attribute = fsg_opts_attr_store, ++}; ++ ++static ssize_t fsg_opts_stall_show(struct fsg_opts *opts, char *page) ++{ ++ int result; ++ ++ mutex_lock(&opts->lock); ++ result = sprintf(page, "%d", opts->common->can_stall); ++ mutex_unlock(&opts->lock); ++ ++ return result; ++} ++ ++static ssize_t fsg_opts_stall_store(struct fsg_opts *opts, const char *page, ++ size_t len) ++{ ++ int ret; ++ u8 num; ++ ++ mutex_lock(&opts->lock); ++ if (opts->refcnt) { ++ ret = -EBUSY; ++ goto end; ++ } ++ ret = kstrtou8(page, 0, &num); ++ if (ret) ++ goto end; ++ ++ opts->common->can_stall = num != 0; ++ ret = len; ++ ++end: ++ mutex_unlock(&opts->lock); ++ return ret; ++} ++ ++static struct fsg_opts_attribute fsg_opts_stall = ++ __CONFIGFS_ATTR(stall, S_IRUGO | S_IWUSR, fsg_opts_stall_show, ++ fsg_opts_stall_store); ++ ++#ifdef CONFIG_USB_GADGET_DEBUG_FILES ++static ssize_t fsg_opts_num_buffers_show(struct fsg_opts *opts, char *page) ++{ ++ int result; ++ ++ mutex_lock(&opts->lock); ++ result = sprintf(page, "%d", opts->common->fsg_num_buffers); ++ mutex_unlock(&opts->lock); ++ ++ return result; ++} ++ ++static ssize_t fsg_opts_num_buffers_store(struct fsg_opts *opts, ++ const char *page, size_t len) ++{ ++ int ret; ++ u8 num; ++ ++ mutex_lock(&opts->lock); ++ if (opts->refcnt) { ++ ret = -EBUSY; ++ goto end; ++ } ++ ret = kstrtou8(page, 0, &num); ++ if (ret) ++ goto end; ++ ++ ret = fsg_num_buffers_validate(num); ++ if (ret) ++ goto end; ++ ++ fsg_common_set_num_buffers(opts->common, num); ++ ret = len; ++ ++end: ++ mutex_unlock(&opts->lock); ++ return ret; ++} ++ ++static struct fsg_opts_attribute fsg_opts_num_buffers = ++ __CONFIGFS_ATTR(num_buffers, S_IRUGO | S_IWUSR, ++ fsg_opts_num_buffers_show, ++ fsg_opts_num_buffers_store); ++ ++#endif ++ ++static struct configfs_attribute *fsg_attrs[] = { ++ &fsg_opts_stall.attr, ++#ifdef CONFIG_USB_GADGET_DEBUG_FILES ++ &fsg_opts_num_buffers.attr, ++#endif ++ NULL, ++}; ++ ++static struct configfs_group_operations fsg_group_ops = { ++ .make_group = fsg_lun_make, ++ .drop_item = fsg_lun_drop, ++}; ++ ++static struct config_item_type fsg_func_type = { ++ .ct_item_ops = &fsg_item_ops, ++ .ct_group_ops = &fsg_group_ops, ++ .ct_attrs = fsg_attrs, ++ .ct_owner = THIS_MODULE, ++}; ++ + static void fsg_free_inst(struct usb_function_instance *fi) + { + struct fsg_opts *opts; +@@ -3307,11 +3644,13 @@ static void fsg_free_inst(struct usb_function_instance *fi) + static struct usb_function_instance *fsg_alloc_inst(void) + { + struct fsg_opts *opts; ++ struct fsg_lun_config config; + int rc; + + opts = kzalloc(sizeof(*opts), GFP_KERNEL); + if (!opts) + return ERR_PTR(-ENOMEM); ++ mutex_init(&opts->lock); + opts->func_inst.free_func_inst = fsg_free_inst; + opts->common = fsg_common_setup(opts->common, false); + if (IS_ERR(opts->common)) { +@@ -3329,6 +3668,18 @@ static struct usb_function_instance *fsg_alloc_inst(void) + + pr_info(FSG_DRIVER_DESC ", version: " FSG_DRIVER_VERSION "\n"); + ++ memset(&config, 0, sizeof(config)); ++ config.removable = true; ++ rc = fsg_common_create_lun(opts->common, &config, 0, "lun.0", ++ (const char **)&opts->func_inst.group.cg_item.ci_name); ++ opts->lun0.lun = opts->common->luns[0]; ++ opts->lun0.lun_id = 0; ++ config_group_init_type_name(&opts->lun0.group, "lun.0", &fsg_lun_type); ++ opts->default_groups[0] = &opts->lun0.group; ++ opts->func_inst.group.default_groups = opts->default_groups; ++ ++ config_group_init_type_name(&opts->func_inst.group, "", &fsg_func_type); ++ + return &opts->func_inst; + + release_luns: +@@ -3341,8 +3692,14 @@ release_opts: + static void fsg_free(struct usb_function *f) + { + struct fsg_dev *fsg; ++ struct fsg_opts *opts; + + fsg = container_of(f, struct fsg_dev, function); ++ opts = container_of(f->fi, struct fsg_opts, func_inst); ++ ++ mutex_lock(&opts->lock); ++ opts->refcnt--; ++ mutex_unlock(&opts->lock); + + kfree(fsg); + } +@@ -3357,6 +3714,9 @@ static struct usb_function *fsg_alloc(struct usb_function_instance *fi) + if (unlikely(!fsg)) + return ERR_PTR(-ENOMEM); + ++ mutex_lock(&opts->lock); ++ opts->refcnt++; ++ mutex_unlock(&opts->lock); + fsg->function.name = FSG_DRIVER_DESC; + fsg->function.bind = fsg_bind; + fsg->function.unbind = fsg_unbind; +diff --git a/drivers/usb/gadget/f_mass_storage.h b/drivers/usb/gadget/f_mass_storage.h +index b53cf8c..7d421d2 100644 +--- a/drivers/usb/gadget/f_mass_storage.h ++++ b/drivers/usb/gadget/f_mass_storage.h +@@ -71,10 +71,27 @@ struct fsg_operations { + int (*thread_exits)(struct fsg_common *common); + }; + ++struct fsg_lun_opts { ++ struct config_group group; ++ struct fsg_lun *lun; ++ int lun_id; ++}; ++ + struct fsg_opts { + struct fsg_common *common; + struct usb_function_instance func_inst; ++ struct fsg_lun_opts lun0; ++ struct config_group *default_groups[2]; + bool no_configfs; /* for legacy gadgets */ ++ ++ /* ++ * Read/write access to configfs attributes is handled by configfs. ++ * ++ * This is to protect the data from concurrent access by read/write ++ * and create symlink/remove symlink. ++ */ ++ struct mutex lock; ++ int refcnt; + }; + + struct fsg_lun_config { +-- +1.8.3.2 + |