diff options
Diffstat (limited to 'drivers/staging/most')
-rw-r--r-- | drivers/staging/most/Documentation/ABI/configfs-most.txt | 204 | ||||
-rw-r--r-- | drivers/staging/most/Documentation/ABI/sysfs-bus-most.txt | 313 | ||||
-rw-r--r-- | drivers/staging/most/Kconfig | 6 | ||||
-rw-r--r-- | drivers/staging/most/Makefile | 3 | ||||
-rw-r--r-- | drivers/staging/most/cdev/cdev.c | 3 | ||||
-rw-r--r-- | drivers/staging/most/configfs.c | 725 | ||||
-rw-r--r-- | drivers/staging/most/core.c | 1491 | ||||
-rw-r--r-- | drivers/staging/most/dim2/dim2.c | 3 | ||||
-rw-r--r-- | drivers/staging/most/i2c/i2c.c | 3 | ||||
-rw-r--r-- | drivers/staging/most/most.h | 337 | ||||
-rw-r--r-- | drivers/staging/most/net/net.c | 3 | ||||
-rw-r--r-- | drivers/staging/most/sound/sound.c | 3 | ||||
-rw-r--r-- | drivers/staging/most/usb/usb.c | 3 | ||||
-rw-r--r-- | drivers/staging/most/video/video.c | 7 |
14 files changed, 12 insertions, 3092 deletions
diff --git a/drivers/staging/most/Documentation/ABI/configfs-most.txt b/drivers/staging/most/Documentation/ABI/configfs-most.txt deleted file mode 100644 index 2bf811449b0b..000000000000 --- a/drivers/staging/most/Documentation/ABI/configfs-most.txt +++ /dev/null @@ -1,204 +0,0 @@ -What: /sys/kernel/config/most_<component> -Date: March 8, 2019 -KernelVersion: 5.2 -Description: Interface is used to configure and connect device channels - to component drivers. - - Attributes are visible only when configfs is mounted. To mount - configfs in /sys/kernel/config directory use: - # mount -t configfs none /sys/kernel/config/ - - -What: /sys/kernel/config/most_cdev/<link> -Date: March 8, 2019 -KernelVersion: 5.2 -Description: - The attributes: - - buffer_size configure the buffer size for this channel - - subbuffer_size configure the sub-buffer size for this channel - (needed for synchronous and isochrnous data) - - - num_buffers configure number of buffers used for this - channel - - datatype configure type of data that will travel over - this channel - - direction configure whether this link will be an input - or output - - dbr_size configure DBR data buffer size (this is used - for MediaLB communication only) - - packets_per_xact - configure the number of packets that will be - collected from the network before being - transmitted via USB (this is used for USB - communication only) - - device name of the device the link is to be attached to - - channel name of the channel the link is to be attached to - - comp_params pass parameters needed by some components - - create_link write '1' to this attribute to trigger the - creation of the link. In case of speculative - configuration, the creation is post-poned until - a physical device is being attached to the bus. - - destroy_link write '1' to this attribute to destroy an - active link - -What: /sys/kernel/config/most_video/<link> -Date: March 8, 2019 -KernelVersion: 5.2 -Description: - The attributes: - - buffer_size configure the buffer size for this channel - - subbuffer_size configure the sub-buffer size for this channel - (needed for synchronous and isochrnous data) - - - num_buffers configure number of buffers used for this - channel - - datatype configure type of data that will travel over - this channel - - direction configure whether this link will be an input - or output - - dbr_size configure DBR data buffer size (this is used - for MediaLB communication only) - - packets_per_xact - configure the number of packets that will be - collected from the network before being - transmitted via USB (this is used for USB - communication only) - - device name of the device the link is to be attached to - - channel name of the channel the link is to be attached to - - comp_params pass parameters needed by some components - - create_link write '1' to this attribute to trigger the - creation of the link. In case of speculative - configuration, the creation is post-poned until - a physical device is being attached to the bus. - - destroy_link write '1' to this attribute to destroy an - active link - -What: /sys/kernel/config/most_net/<link> -Date: March 8, 2019 -KernelVersion: 5.2 -Description: - The attributes: - - buffer_size configure the buffer size for this channel - - subbuffer_size configure the sub-buffer size for this channel - (needed for synchronous and isochrnous data) - - - num_buffers configure number of buffers used for this - channel - - datatype configure type of data that will travel over - this channel - - direction configure whether this link will be an input - or output - - dbr_size configure DBR data buffer size (this is used - for MediaLB communication only) - - packets_per_xact - configure the number of packets that will be - collected from the network before being - transmitted via USB (this is used for USB - communication only) - - device name of the device the link is to be attached to - - channel name of the channel the link is to be attached to - - comp_params pass parameters needed by some components - - create_link write '1' to this attribute to trigger the - creation of the link. In case of speculative - configuration, the creation is post-poned until - a physical device is being attached to the bus. - - destroy_link write '1' to this attribute to destroy an - active link - -What: /sys/kernel/config/most_sound/<card> -Date: March 8, 2019 -KernelVersion: 5.2 -Description: - The attributes: - - create_card write '1' to this attribute to trigger the - registration of the sound card with the ALSA - subsystem. - -What: /sys/kernel/config/most_sound/<card>/<link> -Date: March 8, 2019 -KernelVersion: 5.2 -Description: - The attributes: - - buffer_size configure the buffer size for this channel - - subbuffer_size configure the sub-buffer size for this channel - (needed for synchronous and isochrnous data) - - - num_buffers configure number of buffers used for this - channel - - datatype configure type of data that will travel over - this channel - - direction configure whether this link will be an input - or output - - dbr_size configure DBR data buffer size (this is used - for MediaLB communication only) - - packets_per_xact - configure the number of packets that will be - collected from the network before being - transmitted via USB (this is used for USB - communication only) - - device name of the device the link is to be attached to - - channel name of the channel the link is to be attached to - - comp_params pass parameters needed by some components - - create_link write '1' to this attribute to trigger the - creation of the link. In case of speculative - configuration, the creation is post-poned until - a physical device is being attached to the bus. - - destroy_link write '1' to this attribute to destroy an - active link - -What: /sys/kernel/config/rdma_cm/<hca>/ports/<port-num>/default_roce_tos -Date: March 8, 2019 -KernelVersion: 5.2 -Description: RDMA-CM QPs from HCA <hca> at port <port-num> - will be created with this TOS as default. - This can be overridden by using the rdma_set_option API. - The possible RoCE TOS values are 0-255. diff --git a/drivers/staging/most/Documentation/ABI/sysfs-bus-most.txt b/drivers/staging/most/Documentation/ABI/sysfs-bus-most.txt deleted file mode 100644 index d8fa841e3742..000000000000 --- a/drivers/staging/most/Documentation/ABI/sysfs-bus-most.txt +++ /dev/null @@ -1,313 +0,0 @@ -What: /sys/bus/most/devices/.../description -Date: March 2017 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - Provides information about the interface type and the physical - location of the device. Hardware attached via USB, for instance, - might return <usb_device 1-1.1:1.0> -Users: - -What: /sys/bus/most/devices/.../interface -Date: March 2017 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - Indicates the type of peripheral interface the device uses. -Users: - -What: /sys/bus/most/devices/.../dci -Date: June 2016 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - If the network interface controller is attached via USB, a dci - directory is created that allows applications to read and - write the controller's DCI registers. -Users: - -What: /sys/bus/most/devices/.../dci/arb_address -Date: June 2016 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - This is used to set an arbitrary DCI register address an - application wants to read from or write to. -Users: - -What: /sys/bus/most/devices/.../dci/arb_value -Date: June 2016 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - This is used to read and write the DCI register whose address - is stored in arb_address. -Users: - -What: /sys/bus/most/devices/.../dci/mep_eui48_hi -Date: June 2016 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - This is used to check and configure the MAC address. -Users: - -What: /sys/bus/most/devices/.../dci/mep_eui48_lo -Date: June 2016 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - This is used to check and configure the MAC address. -Users: - -What: /sys/bus/most/devices/.../dci/mep_eui48_mi -Date: June 2016 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - This is used to check and configure the MAC address. -Users: - -What: /sys/bus/most/devices/.../dci/mep_filter -Date: June 2016 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - This is used to check and configure the MEP filter address. -Users: - -What: /sys/bus/most/devices/.../dci/mep_hash0 -Date: June 2016 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - This is used to check and configure the MEP hash table. -Users: - -What: /sys/bus/most/devices/.../dci/mep_hash1 -Date: June 2016 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - This is used to check and configure the MEP hash table. -Users: - -What: /sys/bus/most/devices/.../dci/mep_hash2 -Date: June 2016 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - This is used to check and configure the MEP hash table. -Users: - -What: /sys/bus/most/devices/.../dci/mep_hash3 -Date: June 2016 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - This is used to check and configure the MEP hash table. -Users: - -What: /sys/bus/most/devices/.../dci/ni_state -Date: June 2016 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - Indicates the current network interface state. -Users: - -What: /sys/bus/most/devices/.../dci/node_address -Date: June 2016 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - Indicates the current node address. -Users: - -What: /sys/bus/most/devices/.../dci/node_position -Date: June 2016 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - Indicates the current node position. -Users: - -What: /sys/bus/most/devices/.../dci/packet_bandwidth -Date: June 2016 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - Indicates the configured packet bandwidth. -Users: - -What: /sys/bus/most/devices/.../dci/sync_ep -Date: June 2016 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - Triggers the controller's synchronization process for a certain - endpoint. -Users: - -What: /sys/bus/most/devices/.../<channel>/ -Date: March 2017 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - For every channel of the device a directory is created, whose - name is dictated by the HDM. This enables an application to - collect information about the channel's capabilities and - configure it. -Users: - -What: /sys/bus/most/devices/.../<channel>/available_datatypes -Date: March 2017 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - Indicates the data types the current channel can transport. -Users: - -What: /sys/bus/most/devices/.../<channel>/available_directions -Date: March 2017 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - Indicates the directions the current channel is capable of. -Users: - -What: /sys/bus/most/devices/.../<channel>/number_of_packet_buffers -Date: March 2017 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - Indicates the number of packet buffers the current channel can - handle. -Users: - -What: /sys/bus/most/devices/.../<channel>/number_of_stream_buffers -Date: March 2017 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - Indicates the number of streaming buffers the current channel can - handle. -Users: - -What: /sys/bus/most/devices/.../<channel>/size_of_packet_buffer -Date: March 2017 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - Indicates the size of a packet buffer the current channel can - handle. -Users: - -What: /sys/bus/most/devices/.../<channel>/size_of_stream_buffer -Date: March 2017 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - Indicates the size of a streaming buffer the current channel can - handle. -Users: - -What: /sys/bus/most/devices/.../<channel>/set_number_of_buffers -Date: March 2017 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - This is to configure the number of buffers of the current channel. -Users: - -What: /sys/bus/most/devices/.../<channel>/set_buffer_size -Date: March 2017 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - This is to configure the size of a buffer of the current channel. -Users: - -What: /sys/bus/most/devices/.../<channel>/set_direction -Date: March 2017 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - This is to configure the direction of the current channel. - The following strings will be accepted: - 'dir_tx', - 'dir_rx' -Users: - -What: /sys/bus/most/devices/.../<channel>/set_datatype -Date: March 2017 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - This is to configure the data type of the current channel. - The following strings will be accepted: - 'control', - 'async', - 'sync', - 'isoc_avp' -Users: - -What: /sys/bus/most/devices/.../<channel>/set_subbuffer_size -Date: March 2017 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - This is to configure the subbuffer size of the current channel. -Users: - -What: /sys/bus/most/devices/.../<channel>/set_packets_per_xact -Date: March 2017 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - This is to configure the number of packets per transaction of - the current channel. This is only needed network interface - controller is attached via USB. -Users: - -What: /sys/bus/most/devices/.../<channel>/channel_starving -Date: March 2017 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - Indicates whether current channel ran out of buffers. -Users: - -What: /sys/bus/most/drivers/mostcore/add_link -Date: March 2017 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - This is used to link a channel to a component of the - mostcore. A link created by writing to this file is - referred to as pipe. -Users: - -What: /sys/bus/most/drivers/mostcore/remove_link -Date: March 2017 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - This is used to unlink a channel from a component. -Users: - -What: /sys/bus/most/drivers/mostcore/components -Date: March 2017 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - This is used to retrieve a list of registered components. -Users: - -What: /sys/bus/most/drivers/mostcore/links -Date: March 2017 -KernelVersion: 4.15 -Contact: Christian Gromm <christian.gromm@microchip.com> -Description: - This is used to retrieve a list of established links. -Users: diff --git a/drivers/staging/most/Kconfig b/drivers/staging/most/Kconfig index 6262eb25c80b..c5a99f750abe 100644 --- a/drivers/staging/most/Kconfig +++ b/drivers/staging/most/Kconfig @@ -1,7 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 -menuconfig MOST +menuconfig MOST_COMPONENTS tristate "MOST support" - depends on HAS_DMA && CONFIGFS_FS + depends on HAS_DMA && CONFIGFS_FS && MOST default n help Say Y here if you want to enable MOST support. @@ -16,7 +16,7 @@ menuconfig MOST -if MOST +if MOST_COMPONENTS source "drivers/staging/most/cdev/Kconfig" diff --git a/drivers/staging/most/Makefile b/drivers/staging/most/Makefile index 20a99ecb37c4..a803a98654a8 100644 --- a/drivers/staging/most/Makefile +++ b/drivers/staging/most/Makefile @@ -1,7 +1,4 @@ # SPDX-License-Identifier: GPL-2.0 -obj-$(CONFIG_MOST) += most_core.o -most_core-y := core.o -most_core-y += configfs.o obj-$(CONFIG_MOST_CDEV) += cdev/ obj-$(CONFIG_MOST_NET) += net/ diff --git a/drivers/staging/most/cdev/cdev.c b/drivers/staging/most/cdev/cdev.c index 71943d17f825..cc1e3dea196d 100644 --- a/drivers/staging/most/cdev/cdev.c +++ b/drivers/staging/most/cdev/cdev.c @@ -16,8 +16,7 @@ #include <linux/kfifo.h> #include <linux/uaccess.h> #include <linux/idr.h> - -#include "../most.h" +#include <linux/most.h> #define CHRDEV_REGION_SIZE 50 diff --git a/drivers/staging/most/configfs.c b/drivers/staging/most/configfs.c deleted file mode 100644 index 9a961222f458..000000000000 --- a/drivers/staging/most/configfs.c +++ /dev/null @@ -1,725 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * configfs.c - Implementation of configfs interface to the driver stack - * - * Copyright (C) 2013-2015 Microchip Technology Germany II GmbH & Co. KG - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/init.h> -#include <linux/configfs.h> - -#include "most.h" - -#define MAX_STRING_SIZE 80 - -struct mdev_link { - struct config_item item; - struct list_head list; - bool create_link; - bool destroy_link; - u16 num_buffers; - u16 buffer_size; - u16 subbuffer_size; - u16 packets_per_xact; - u16 dbr_size; - char datatype[MAX_STRING_SIZE]; - char direction[MAX_STRING_SIZE]; - char name[MAX_STRING_SIZE]; - char device[MAX_STRING_SIZE]; - char channel[MAX_STRING_SIZE]; - char comp[MAX_STRING_SIZE]; - char comp_params[MAX_STRING_SIZE]; -}; - -static struct list_head mdev_link_list; - -static int set_cfg_buffer_size(struct mdev_link *link) -{ - return most_set_cfg_buffer_size(link->device, link->channel, - link->buffer_size); -} - -static int set_cfg_subbuffer_size(struct mdev_link *link) -{ - return most_set_cfg_subbuffer_size(link->device, link->channel, - link->subbuffer_size); -} - -static int set_cfg_dbr_size(struct mdev_link *link) -{ - return most_set_cfg_dbr_size(link->device, link->channel, - link->dbr_size); -} - -static int set_cfg_num_buffers(struct mdev_link *link) -{ - return most_set_cfg_num_buffers(link->device, link->channel, - link->num_buffers); -} - -static int set_cfg_packets_xact(struct mdev_link *link) -{ - return most_set_cfg_packets_xact(link->device, link->channel, - link->packets_per_xact); -} - -static int set_cfg_direction(struct mdev_link *link) -{ - return most_set_cfg_direction(link->device, link->channel, - link->direction); -} - -static int set_cfg_datatype(struct mdev_link *link) -{ - return most_set_cfg_datatype(link->device, link->channel, - link->datatype); -} - -static int (*set_config_val[])(struct mdev_link *link) = { - set_cfg_buffer_size, - set_cfg_subbuffer_size, - set_cfg_dbr_size, - set_cfg_num_buffers, - set_cfg_packets_xact, - set_cfg_direction, - set_cfg_datatype, -}; - -static struct mdev_link *to_mdev_link(struct config_item *item) -{ - return container_of(item, struct mdev_link, item); -} - -static int set_config_and_add_link(struct mdev_link *mdev_link) -{ - int i; - int ret; - - for (i = 0; i < ARRAY_SIZE(set_config_val); i++) { - ret = set_config_val[i](mdev_link); - if (ret < 0 && ret != -ENODEV) { - pr_err("Config failed\n"); - return ret; - } - } - - return most_add_link(mdev_link->device, mdev_link->channel, - mdev_link->comp, mdev_link->name, - mdev_link->comp_params); -} - -static ssize_t mdev_link_create_link_store(struct config_item *item, - const char *page, size_t count) -{ - struct mdev_link *mdev_link = to_mdev_link(item); - bool tmp; - int ret; - - ret = kstrtobool(page, &tmp); - if (ret) - return ret; - if (!tmp) - return count; - ret = set_config_and_add_link(mdev_link); - if (ret && ret != -ENODEV) - return ret; - list_add_tail(&mdev_link->list, &mdev_link_list); - mdev_link->create_link = tmp; - mdev_link->destroy_link = false; - - return count; -} - -static ssize_t mdev_link_destroy_link_store(struct config_item *item, - const char *page, size_t count) -{ - struct mdev_link *mdev_link = to_mdev_link(item); - bool tmp; - int ret; - - ret = kstrtobool(page, &tmp); - if (ret) - return ret; - if (!tmp) - return count; - - ret = most_remove_link(mdev_link->device, mdev_link->channel, - mdev_link->comp); - if (ret) - return ret; - if (!list_empty(&mdev_link_list)) - list_del(&mdev_link->list); - - mdev_link->destroy_link = tmp; - - return count; -} - -static ssize_t mdev_link_direction_show(struct config_item *item, char *page) -{ - return snprintf(page, PAGE_SIZE, "%s\n", to_mdev_link(item)->direction); -} - -static ssize_t mdev_link_direction_store(struct config_item *item, - const char *page, size_t count) -{ - struct mdev_link *mdev_link = to_mdev_link(item); - - if (!sysfs_streq(page, "dir_rx") && !sysfs_streq(page, "rx") && - !sysfs_streq(page, "dir_tx") && !sysfs_streq(page, "tx")) - return -EINVAL; - strcpy(mdev_link->direction, page); - strim(mdev_link->direction); - return count; -} - -static ssize_t mdev_link_datatype_show(struct config_item *item, char *page) -{ - return snprintf(page, PAGE_SIZE, "%s\n", to_mdev_link(item)->datatype); -} - -static ssize_t mdev_link_datatype_store(struct config_item *item, - const char *page, size_t count) -{ - struct mdev_link *mdev_link = to_mdev_link(item); - - if (!sysfs_streq(page, "control") && !sysfs_streq(page, "async") && - !sysfs_streq(page, "sync") && !sysfs_streq(page, "isoc") && - !sysfs_streq(page, "isoc_avp")) - return -EINVAL; - strcpy(mdev_link->datatype, page); - strim(mdev_link->datatype); - return count; -} - -static ssize_t mdev_link_device_show(struct config_item *item, char *page) -{ - return snprintf(page, PAGE_SIZE, "%s\n", to_mdev_link(item)->device); -} - -static ssize_t mdev_link_device_store(struct config_item *item, - const char *page, size_t count) -{ - struct mdev_link *mdev_link = to_mdev_link(item); - - strlcpy(mdev_link->device, page, sizeof(mdev_link->device)); - strim(mdev_link->device); - return count; -} - -static ssize_t mdev_link_channel_show(struct config_item *item, char *page) -{ - return snprintf(page, PAGE_SIZE, "%s\n", to_mdev_link(item)->channel); -} - -static ssize_t mdev_link_channel_store(struct config_item *item, - const char *page, size_t count) -{ - struct mdev_link *mdev_link = to_mdev_link(item); - - strlcpy(mdev_link->channel, page, sizeof(mdev_link->channel)); - strim(mdev_link->channel); - return count; -} - -static ssize_t mdev_link_comp_show(struct config_item *item, char *page) -{ - return snprintf(page, PAGE_SIZE, "%s\n", to_mdev_link(item)->comp); -} - -static ssize_t mdev_link_comp_store(struct config_item *item, - const char *page, size_t count) -{ - struct mdev_link *mdev_link = to_mdev_link(item); - - strlcpy(mdev_link->comp, page, sizeof(mdev_link->comp)); - strim(mdev_link->comp); - return count; -} - -static ssize_t mdev_link_comp_params_show(struct config_item *item, char *page) -{ - return snprintf(page, PAGE_SIZE, "%s\n", - to_mdev_link(item)->comp_params); -} - -static ssize_t mdev_link_comp_params_store(struct config_item *item, - const char *page, size_t count) -{ - struct mdev_link *mdev_link = to_mdev_link(item); - - strlcpy(mdev_link->comp_params, page, sizeof(mdev_link->comp_params)); - strim(mdev_link->comp_params); - return count; -} - -static ssize_t mdev_link_num_buffers_show(struct config_item *item, char *page) -{ - return snprintf(page, PAGE_SIZE, "%d\n", - to_mdev_link(item)->num_buffers); -} - -static ssize_t mdev_link_num_buffers_store(struct config_item *item, - const char *page, size_t count) -{ - struct mdev_link *mdev_link = to_mdev_link(item); - int ret; - - ret = kstrtou16(page, 0, &mdev_link->num_buffers); - if (ret) - return ret; - return count; -} - -static ssize_t mdev_link_buffer_size_show(struct config_item *item, char *page) -{ - return snprintf(page, PAGE_SIZE, "%d\n", - to_mdev_link(item)->buffer_size); -} - -static ssize_t mdev_link_buffer_size_store(struct config_item *item, - const char *page, size_t count) -{ - struct mdev_link *mdev_link = to_mdev_link(item); - int ret; - - ret = kstrtou16(page, 0, &mdev_link->buffer_size); - if (ret) - return ret; - return count; -} - -static ssize_t mdev_link_subbuffer_size_show(struct config_item *item, - char *page) -{ - return snprintf(page, PAGE_SIZE, "%d\n", - to_mdev_link(item)->subbuffer_size); -} - -static ssize_t mdev_link_subbuffer_size_store(struct config_item *item, - const char *page, size_t count) -{ - struct mdev_link *mdev_link = to_mdev_link(item); - int ret; - - ret = kstrtou16(page, 0, &mdev_link->subbuffer_size); - if (ret) - return ret; - return count; -} - -static ssize_t mdev_link_packets_per_xact_show(struct config_item *item, - char *page) -{ - return snprintf(page, PAGE_SIZE, "%d\n", - to_mdev_link(item)->packets_per_xact); -} - -static ssize_t mdev_link_packets_per_xact_store(struct config_item *item, - const char *page, size_t count) -{ - struct mdev_link *mdev_link = to_mdev_link(item); - int ret; - - ret = kstrtou16(page, 0, &mdev_link->packets_per_xact); - if (ret) - return ret; - return count; -} - -static ssize_t mdev_link_dbr_size_show(struct config_item *item, char *page) -{ - return snprintf(page, PAGE_SIZE, "%d\n", to_mdev_link(item)->dbr_size); -} - -static ssize_t mdev_link_dbr_size_store(struct config_item *item, - const char *page, size_t count) -{ - struct mdev_link *mdev_link = to_mdev_link(item); - int ret; - - ret = kstrtou16(page, 0, &mdev_link->dbr_size); - if (ret) - return ret; - return count; -} - -CONFIGFS_ATTR_WO(mdev_link_, create_link); -CONFIGFS_ATTR_WO(mdev_link_, destroy_link); -CONFIGFS_ATTR(mdev_link_, device); -CONFIGFS_ATTR(mdev_link_, channel); -CONFIGFS_ATTR(mdev_link_, comp); -CONFIGFS_ATTR(mdev_link_, comp_params); -CONFIGFS_ATTR(mdev_link_, num_buffers); -CONFIGFS_ATTR(mdev_link_, buffer_size); -CONFIGFS_ATTR(mdev_link_, subbuffer_size); -CONFIGFS_ATTR(mdev_link_, packets_per_xact); -CONFIGFS_ATTR(mdev_link_, datatype); -CONFIGFS_ATTR(mdev_link_, direction); -CONFIGFS_ATTR(mdev_link_, dbr_size); - -static struct configfs_attribute *mdev_link_attrs[] = { - &mdev_link_attr_create_link, - &mdev_link_attr_destroy_link, - &mdev_link_attr_device, - &mdev_link_attr_channel, - &mdev_link_attr_comp, - &mdev_link_attr_comp_params, - &mdev_link_attr_num_buffers, - &mdev_link_attr_buffer_size, - &mdev_link_attr_subbuffer_size, - &mdev_link_attr_packets_per_xact, - &mdev_link_attr_datatype, - &mdev_link_attr_direction, - &mdev_link_attr_dbr_size, - NULL, -}; - -static void mdev_link_release(struct config_item *item) -{ - struct mdev_link *mdev_link = to_mdev_link(item); - int ret; - - if (mdev_link->destroy_link) - goto free_item; - - ret = most_remove_link(mdev_link->device, mdev_link->channel, - mdev_link->comp); - if (ret) { - pr_err("Removing link failed.\n"); - goto free_item; - } - - if (!list_empty(&mdev_link_list)) - list_del(&mdev_link->list); - -free_item: - kfree(to_mdev_link(item)); -} - -static struct configfs_item_operations mdev_link_item_ops = { - .release = mdev_link_release, -}; - -static const struct config_item_type mdev_link_type = { - .ct_item_ops = &mdev_link_item_ops, - .ct_attrs = mdev_link_attrs, - .ct_owner = THIS_MODULE, -}; - -struct most_common { - struct config_group group; - struct module *mod; - struct configfs_subsystem subsys; -}; - -static struct most_common *to_most_common(struct configfs_subsystem *subsys) -{ - return container_of(subsys, struct most_common, subsys); -} - -static struct config_item *most_common_make_item(struct config_group *group, - const char *name) -{ - struct mdev_link *mdev_link; - struct most_common *mc = to_most_common(group->cg_subsys); - - mdev_link = kzalloc(sizeof(*mdev_link), GFP_KERNEL); - if (!mdev_link) - return ERR_PTR(-ENOMEM); - - if (!try_module_get(mc->mod)) { - kfree(mdev_link); - return ERR_PTR(-ENOLCK); - } - config_item_init_type_name(&mdev_link->item, name, - &mdev_link_type); - - if (!strcmp(group->cg_item.ci_namebuf, "most_cdev")) - strcpy(mdev_link->comp, "cdev"); - else if (!strcmp(group->cg_item.ci_namebuf, "most_net")) - strcpy(mdev_link->comp, "net"); - else if (!strcmp(group->cg_item.ci_namebuf, "most_video")) - strcpy(mdev_link->comp, "video"); - strcpy(mdev_link->name, name); - return &mdev_link->item; -} - -static void most_common_release(struct config_item *item) -{ - struct config_group *group = to_config_group(item); - - kfree(to_most_common(group->cg_subsys)); -} - -static struct configfs_item_operations most_common_item_ops = { - .release = most_common_release, -}; - -static void most_common_disconnect(struct config_group *group, - struct config_item *item) -{ - struct most_common *mc = to_most_common(group->cg_subsys); - - module_put(mc->mod); -} - -static struct configfs_group_operations most_common_group_ops = { - .make_item = most_common_make_item, - .disconnect_notify = most_common_disconnect, -}; - -static const struct config_item_type most_common_type = { - .ct_item_ops = &most_common_item_ops, - .ct_group_ops = &most_common_group_ops, - .ct_owner = THIS_MODULE, -}; - -static struct most_common most_cdev = { - .subsys = { - .su_group = { - .cg_item = { - .ci_namebuf = "most_cdev", - .ci_type = &most_common_type, - }, - }, - }, -}; - -static struct most_common most_net = { - .subsys = { - .su_group = { - .cg_item = { - .ci_namebuf = "most_net", - .ci_type = &most_common_type, - }, - }, - }, -}; - -static struct most_common most_video = { - .subsys = { - .su_group = { - .cg_item = { - .ci_namebuf = "most_video", - .ci_type = &most_common_type, - }, - }, - }, -}; - -struct most_snd_grp { - struct config_group group; - bool create_card; - struct list_head list; -}; - -static struct most_snd_grp *to_most_snd_grp(struct config_item *item) -{ - return container_of(to_config_group(item), struct most_snd_grp, group); -} - -static struct config_item *most_snd_grp_make_item(struct config_group *group, - const char *name) -{ - struct mdev_link *mdev_link; - - mdev_link = kzalloc(sizeof(*mdev_link), GFP_KERNEL); - if (!mdev_link) - return ERR_PTR(-ENOMEM); - - config_item_init_type_name(&mdev_link->item, name, &mdev_link_type); - mdev_link->create_link = false; - strcpy(mdev_link->name, name); - strcpy(mdev_link->comp, "sound"); - return &mdev_link->item; -} - -static ssize_t most_snd_grp_create_card_store(struct config_item *item, - const char *page, size_t count) -{ - struct most_snd_grp *snd_grp = to_most_snd_grp(item); - int ret; - bool tmp; - - ret = kstrtobool(page, &tmp); - if (ret) - return ret; - if (tmp) { - ret = most_cfg_complete("sound"); - if (ret) - return ret; - } - snd_grp->create_card = tmp; - return count; -} - -CONFIGFS_ATTR_WO(most_snd_grp_, create_card); - -static struct configfs_attribute *most_snd_grp_attrs[] = { - &most_snd_grp_attr_create_card, - NULL, -}; - -static void most_snd_grp_release(struct config_item *item) -{ - struct most_snd_grp *group = to_most_snd_grp(item); - - list_del(&group->list); - kfree(group); -} - -static struct configfs_item_operations most_snd_grp_item_ops = { - .release = most_snd_grp_release, -}; - -static struct configfs_group_operations most_snd_grp_group_ops = { - .make_item = most_snd_grp_make_item, -}; - -static const struct config_item_type most_snd_grp_type = { - .ct_item_ops = &most_snd_grp_item_ops, - .ct_group_ops = &most_snd_grp_group_ops, - .ct_attrs = most_snd_grp_attrs, - .ct_owner = THIS_MODULE, -}; - -struct most_sound { - struct configfs_subsystem subsys; - struct list_head soundcard_list; - struct module *mod; -}; - -static struct config_group *most_sound_make_group(struct config_group *group, - const char *name) -{ - struct most_snd_grp *most; - struct most_sound *ms = container_of(group->cg_subsys, - struct most_sound, subsys); - - list_for_each_entry(most, &ms->soundcard_list, list) { - if (!most->create_card) { - pr_info("adapter configuration still in progress.\n"); - return ERR_PTR(-EPROTO); - } - } - if (!try_module_get(ms->mod)) - return ERR_PTR(-ENOLCK); - most = kzalloc(sizeof(*most), GFP_KERNEL); - if (!most) { - module_put(ms->mod); - return ERR_PTR(-ENOMEM); - } - config_group_init_type_name(&most->group, name, &most_snd_grp_type); - list_add_tail(&most->list, &ms->soundcard_list); - return &most->group; -} - -static void most_sound_disconnect(struct config_group *group, - struct config_item *item) -{ - struct most_sound *ms = container_of(group->cg_subsys, - struct most_sound, subsys); - module_put(ms->mod); -} - -static struct configfs_group_operations most_sound_group_ops = { - .make_group = most_sound_make_group, - .disconnect_notify = most_sound_disconnect, -}; - -static const struct config_item_type most_sound_type = { - .ct_group_ops = &most_sound_group_ops, - .ct_owner = THIS_MODULE, -}; - -static struct most_sound most_sound_subsys = { - .subsys = { - .su_group = { - .cg_item = { - .ci_namebuf = "most_sound", - .ci_type = &most_sound_type, - }, - }, - }, -}; - -int most_register_configfs_subsys(struct most_component *c) -{ - int ret; - - if (!strcmp(c->name, "cdev")) { - most_cdev.mod = c->mod; - ret = configfs_register_subsystem(&most_cdev.subsys); - } else if (!strcmp(c->name, "net")) { - most_net.mod = c->mod; - ret = configfs_register_subsystem(&most_net.subsys); - } else if (!strcmp(c->name, "video")) { - most_video.mod = c->mod; - ret = configfs_register_subsystem(&most_video.subsys); - } else if (!strcmp(c->name, "sound")) { - most_sound_subsys.mod = c->mod; - ret = configfs_register_subsystem(&most_sound_subsys.subsys); - } else { - return -ENODEV; - } - - if (ret) { - pr_err("Error %d while registering subsystem %s\n", - ret, c->name); - } - return ret; -} -EXPORT_SYMBOL_GPL(most_register_configfs_subsys); - -void most_interface_register_notify(const char *mdev) -{ - bool register_snd_card = false; - struct mdev_link *mdev_link; - - list_for_each_entry(mdev_link, &mdev_link_list, list) { - if (!strcmp(mdev_link->device, mdev)) { - set_config_and_add_link(mdev_link); - if (!strcmp(mdev_link->comp, "sound")) - register_snd_card = true; - } - } - if (register_snd_card) - most_cfg_complete("sound"); -} - -void most_deregister_configfs_subsys(struct most_component *c) -{ - if (!strcmp(c->name, "cdev")) - configfs_unregister_subsystem(&most_cdev.subsys); - else if (!strcmp(c->name, "net")) - configfs_unregister_subsystem(&most_net.subsys); - else if (!strcmp(c->name, "video")) - configfs_unregister_subsystem(&most_video.subsys); - else if (!strcmp(c->name, "sound")) - configfs_unregister_subsystem(&most_sound_subsys.subsys); -} -EXPORT_SYMBOL_GPL(most_deregister_configfs_subsys); - -int __init configfs_init(void) -{ - config_group_init(&most_cdev.subsys.su_group); - mutex_init(&most_cdev.subsys.su_mutex); - - config_group_init(&most_net.subsys.su_group); - mutex_init(&most_net.subsys.su_mutex); - - config_group_init(&most_video.subsys.su_group); - mutex_init(&most_video.subsys.su_mutex); - - config_group_init(&most_sound_subsys.subsys.su_group); - mutex_init(&most_sound_subsys.subsys.su_mutex); - - INIT_LIST_HEAD(&most_sound_subsys.soundcard_list); - INIT_LIST_HEAD(&mdev_link_list); - - return 0; -} diff --git a/drivers/staging/most/core.c b/drivers/staging/most/core.c deleted file mode 100644 index 0c4ae6920d77..000000000000 --- a/drivers/staging/most/core.c +++ /dev/null @@ -1,1491 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * core.c - Implementation of core module of MOST Linux driver stack - * - * Copyright (C) 2013-2020 Microchip Technology Germany II GmbH & Co. KG - */ - -#include <linux/module.h> -#include <linux/fs.h> -#include <linux/slab.h> -#include <linux/init.h> -#include <linux/device.h> -#include <linux/list.h> -#include <linux/poll.h> -#include <linux/wait.h> -#include <linux/kobject.h> -#include <linux/mutex.h> -#include <linux/completion.h> -#include <linux/sysfs.h> -#include <linux/kthread.h> -#include <linux/dma-mapping.h> -#include <linux/idr.h> - -#include "most.h" - -#define MAX_CHANNELS 64 -#define STRING_SIZE 80 - -static struct ida mdev_id; -static int dummy_num_buffers; -static struct list_head comp_list; - -struct pipe { - struct most_component *comp; - int refs; - int num_buffers; -}; - -struct most_channel { - struct device dev; - struct completion cleanup; - atomic_t mbo_ref; - atomic_t mbo_nq_level; - u16 channel_id; - char name[STRING_SIZE]; - bool is_poisoned; - struct mutex start_mutex; /* channel activation synchronization */ - struct mutex nq_mutex; /* nq thread synchronization */ - int is_starving; - struct most_interface *iface; - struct most_channel_config cfg; - bool keep_mbo; - bool enqueue_halt; - struct list_head fifo; - spinlock_t fifo_lock; /* fifo access synchronization */ - struct list_head halt_fifo; - struct list_head list; - struct pipe pipe0; - struct pipe pipe1; - struct list_head trash_fifo; - struct task_struct *hdm_enqueue_task; - wait_queue_head_t hdm_fifo_wq; - -}; - -#define to_channel(d) container_of(d, struct most_channel, dev) - -struct interface_private { - int dev_id; - char name[STRING_SIZE]; - struct most_channel *channel[MAX_CHANNELS]; - struct list_head channel_list; -}; - -static const struct { - int most_ch_data_type; - const char *name; -} ch_data_type[] = { - { MOST_CH_CONTROL, "control" }, - { MOST_CH_ASYNC, "async" }, - { MOST_CH_SYNC, "sync" }, - { MOST_CH_ISOC, "isoc"}, - { MOST_CH_ISOC, "isoc_avp"}, -}; - -/** - * list_pop_mbo - retrieves the first MBO of the list and removes it - * @ptr: the list head to grab the MBO from. - */ -#define list_pop_mbo(ptr) \ -({ \ - struct mbo *_mbo = list_first_entry(ptr, struct mbo, list); \ - list_del(&_mbo->list); \ - _mbo; \ -}) - -/** - * most_free_mbo_coherent - free an MBO and its coherent buffer - * @mbo: most buffer - */ -static void most_free_mbo_coherent(struct mbo *mbo) -{ - struct most_channel *c = mbo->context; - u16 const coherent_buf_size = c->cfg.buffer_size + c->cfg.extra_len; - - if (c->iface->dma_free) - c->iface->dma_free(mbo, coherent_buf_size); - else - kfree(mbo->virt_address); - kfree(mbo); - if (atomic_sub_and_test(1, &c->mbo_ref)) - complete(&c->cleanup); -} - -/** - * flush_channel_fifos - clear the channel fifos - * @c: pointer to channel object - */ -static void flush_channel_fifos(struct most_channel *c) -{ - unsigned long flags, hf_flags; - struct mbo *mbo, *tmp; - - if (list_empty(&c->fifo) && list_empty(&c->halt_fifo)) - return; - - spin_lock_irqsave(&c->fifo_lock, flags); - list_for_each_entry_safe(mbo, tmp, &c->fifo, list) { - list_del(&mbo->list); - spin_unlock_irqrestore(&c->fifo_lock, flags); - most_free_mbo_coherent(mbo); - spin_lock_irqsave(&c->fifo_lock, flags); - } - spin_unlock_irqrestore(&c->fifo_lock, flags); - - spin_lock_irqsave(&c->fifo_lock, hf_flags); - list_for_each_entry_safe(mbo, tmp, &c->halt_fifo, list) { - list_del(&mbo->list); - spin_unlock_irqrestore(&c->fifo_lock, hf_flags); - most_free_mbo_coherent(mbo); - spin_lock_irqsave(&c->fifo_lock, hf_flags); - } - spin_unlock_irqrestore(&c->fifo_lock, hf_flags); - - if (unlikely((!list_empty(&c->fifo) || !list_empty(&c->halt_fifo)))) - dev_warn(&c->dev, "Channel or trash fifo not empty\n"); -} - -/** - * flush_trash_fifo - clear the trash fifo - * @c: pointer to channel object - */ -static int flush_trash_fifo(struct most_channel *c) -{ - struct mbo *mbo, *tmp; - unsigned long flags; - - spin_lock_irqsave(&c->fifo_lock, flags); - list_for_each_entry_safe(mbo, tmp, &c->trash_fifo, list) { - list_del(&mbo->list); - spin_unlock_irqrestore(&c->fifo_lock, flags); - most_free_mbo_coherent(mbo); - spin_lock_irqsave(&c->fifo_lock, flags); - } - spin_unlock_irqrestore(&c->fifo_lock, flags); - return 0; -} - -static ssize_t available_directions_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct most_channel *c = to_channel(dev); - unsigned int i = c->channel_id; - - strcpy(buf, ""); - if (c->iface->channel_vector[i].direction & MOST_CH_RX) - strcat(buf, "rx "); - if (c->iface->channel_vector[i].direction & MOST_CH_TX) - strcat(buf, "tx "); - strcat(buf, "\n"); - return strlen(buf); -} - -static ssize_t available_datatypes_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct most_channel *c = to_channel(dev); - unsigned int i = c->channel_id; - - strcpy(buf, ""); - if (c->iface->channel_vector[i].data_type & MOST_CH_CONTROL) - strcat(buf, "control "); - if (c->iface->channel_vector[i].data_type & MOST_CH_ASYNC) - strcat(buf, "async "); - if (c->iface->channel_vector[i].data_type & MOST_CH_SYNC) - strcat(buf, "sync "); - if (c->iface->channel_vector[i].data_type & MOST_CH_ISOC) - strcat(buf, "isoc "); - strcat(buf, "\n"); - return strlen(buf); -} - -static ssize_t number_of_packet_buffers_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct most_channel *c = to_channel(dev); - unsigned int i = c->channel_id; - - return snprintf(buf, PAGE_SIZE, "%d\n", - c->iface->channel_vector[i].num_buffers_packet); -} - -static ssize_t number_of_stream_buffers_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct most_channel *c = to_channel(dev); - unsigned int i = c->channel_id; - - return snprintf(buf, PAGE_SIZE, "%d\n", - c->iface->channel_vector[i].num_buffers_streaming); -} - -static ssize_t size_of_packet_buffer_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct most_channel *c = to_channel(dev); - unsigned int i = c->channel_id; - - return snprintf(buf, PAGE_SIZE, "%d\n", - c->iface->channel_vector[i].buffer_size_packet); -} - -static ssize_t size_of_stream_buffer_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct most_channel *c = to_channel(dev); - unsigned int i = c->channel_id; - - return snprintf(buf, PAGE_SIZE, "%d\n", - c->iface->channel_vector[i].buffer_size_streaming); -} - -static ssize_t channel_starving_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct most_channel *c = to_channel(dev); - - return snprintf(buf, PAGE_SIZE, "%d\n", c->is_starving); -} - -static ssize_t set_number_of_buffers_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct most_channel *c = to_channel(dev); - - return snprintf(buf, PAGE_SIZE, "%d\n", c->cfg.num_buffers); -} - -static ssize_t set_buffer_size_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct most_channel *c = to_channel(dev); - - return snprintf(buf, PAGE_SIZE, "%d\n", c->cfg.buffer_size); -} - -static ssize_t set_direction_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct most_channel *c = to_channel(dev); - - if (c->cfg.direction & MOST_CH_TX) - return snprintf(buf, PAGE_SIZE, "tx\n"); - else if (c->cfg.direction & MOST_CH_RX) - return snprintf(buf, PAGE_SIZE, "rx\n"); - return snprintf(buf, PAGE_SIZE, "unconfigured\n"); -} - -static ssize_t set_datatype_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - int i; - struct most_channel *c = to_channel(dev); - - for (i = 0; i < ARRAY_SIZE(ch_data_type); i++) { - if (c->cfg.data_type & ch_data_type[i].most_ch_data_type) - return snprintf(buf, PAGE_SIZE, "%s", - ch_data_type[i].name); - } - return snprintf(buf, PAGE_SIZE, "unconfigured\n"); -} - -static ssize_t set_subbuffer_size_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct most_channel *c = to_channel(dev); - - return snprintf(buf, PAGE_SIZE, "%d\n", c->cfg.subbuffer_size); -} - -static ssize_t set_packets_per_xact_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct most_channel *c = to_channel(dev); - - return snprintf(buf, PAGE_SIZE, "%d\n", c->cfg.packets_per_xact); -} - -static ssize_t set_dbr_size_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct most_channel *c = to_channel(dev); - - return snprintf(buf, PAGE_SIZE, "%d\n", c->cfg.dbr_size); -} - -#define to_dev_attr(a) container_of(a, struct device_attribute, attr) -static umode_t channel_attr_is_visible(struct kobject *kobj, - struct attribute *attr, int index) -{ - struct device_attribute *dev_attr = to_dev_attr(attr); - struct device *dev = kobj_to_dev(kobj); - struct most_channel *c = to_channel(dev); - - if (!strcmp(dev_attr->attr.name, "set_dbr_size") && - (c->iface->interface != ITYPE_MEDIALB_DIM2)) - return 0; - if (!strcmp(dev_attr->attr.name, "set_packets_per_xact") && - (c->iface->interface != ITYPE_USB)) - return 0; - - return attr->mode; -} - -#define DEV_ATTR(_name) (&dev_attr_##_name.attr) - -static DEVICE_ATTR_RO(available_directions); -static DEVICE_ATTR_RO(available_datatypes); -static DEVICE_ATTR_RO(number_of_packet_buffers); -static DEVICE_ATTR_RO(number_of_stream_buffers); -static DEVICE_ATTR_RO(size_of_stream_buffer); -static DEVICE_ATTR_RO(size_of_packet_buffer); -static DEVICE_ATTR_RO(channel_starving); -static DEVICE_ATTR_RO(set_buffer_size); -static DEVICE_ATTR_RO(set_number_of_buffers); -static DEVICE_ATTR_RO(set_direction); -static DEVICE_ATTR_RO(set_datatype); -static DEVICE_ATTR_RO(set_subbuffer_size); -static DEVICE_ATTR_RO(set_packets_per_xact); -static DEVICE_ATTR_RO(set_dbr_size); - -static struct attribute *channel_attrs[] = { - DEV_ATTR(available_directions), - DEV_ATTR(available_datatypes), - DEV_ATTR(number_of_packet_buffers), - DEV_ATTR(number_of_stream_buffers), - DEV_ATTR(size_of_stream_buffer), - DEV_ATTR(size_of_packet_buffer), - DEV_ATTR(channel_starving), - DEV_ATTR(set_buffer_size), - DEV_ATTR(set_number_of_buffers), - DEV_ATTR(set_direction), - DEV_ATTR(set_datatype), - DEV_ATTR(set_subbuffer_size), - DEV_ATTR(set_packets_per_xact), - DEV_ATTR(set_dbr_size), - NULL, -}; - -static struct attribute_group channel_attr_group = { - .attrs = channel_attrs, - .is_visible = channel_attr_is_visible, -}; - -static const struct attribute_group *channel_attr_groups[] = { - &channel_attr_group, - NULL, -}; - -static ssize_t description_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct most_interface *iface = dev_get_drvdata(dev); - - return snprintf(buf, PAGE_SIZE, "%s\n", iface->description); -} - -static ssize_t interface_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct most_interface *iface = dev_get_drvdata(dev); - - switch (iface->interface) { - case ITYPE_LOOPBACK: - return snprintf(buf, PAGE_SIZE, "loopback\n"); - case ITYPE_I2C: - return snprintf(buf, PAGE_SIZE, "i2c\n"); - case ITYPE_I2S: - return snprintf(buf, PAGE_SIZE, "i2s\n"); - case ITYPE_TSI: - return snprintf(buf, PAGE_SIZE, "tsi\n"); - case ITYPE_HBI: - return snprintf(buf, PAGE_SIZE, "hbi\n"); - case ITYPE_MEDIALB_DIM: - return snprintf(buf, PAGE_SIZE, "mlb_dim\n"); - case ITYPE_MEDIALB_DIM2: - return snprintf(buf, PAGE_SIZE, "mlb_dim2\n"); - case ITYPE_USB: - return snprintf(buf, PAGE_SIZE, "usb\n"); - case ITYPE_PCIE: - return snprintf(buf, PAGE_SIZE, "pcie\n"); - } - return snprintf(buf, PAGE_SIZE, "unknown\n"); -} - -static DEVICE_ATTR_RO(description); -static DEVICE_ATTR_RO(interface); - -static struct attribute *interface_attrs[] = { - DEV_ATTR(description), - DEV_ATTR(interface), - NULL, -}; - -static struct attribute_group interface_attr_group = { - .attrs = interface_attrs, -}; - -static const struct attribute_group *interface_attr_groups[] = { - &interface_attr_group, - NULL, -}; - -static struct most_component *match_component(char *name) -{ - struct most_component *comp; - - list_for_each_entry(comp, &comp_list, list) { - if (!strcmp(comp->name, name)) - return comp; - } - return NULL; -} - -struct show_links_data { - int offs; - char *buf; -}; - -static int print_links(struct device *dev, void *data) -{ - struct show_links_data *d = data; - int offs = d->offs; - char *buf = d->buf; - struct most_channel *c; - struct most_interface *iface = dev_get_drvdata(dev); - - list_for_each_entry(c, &iface->p->channel_list, list) { - if (c->pipe0.comp) { - offs += snprintf(buf + offs, - PAGE_SIZE - offs, - "%s:%s:%s\n", - c->pipe0.comp->name, - dev_name(iface->dev), - dev_name(&c->dev)); - } - if (c->pipe1.comp) { - offs += snprintf(buf + offs, - PAGE_SIZE - offs, - "%s:%s:%s\n", - c->pipe1.comp->name, - dev_name(iface->dev), - dev_name(&c->dev)); - } - } - d->offs = offs; - return 0; -} - -static int most_match(struct device *dev, struct device_driver *drv) -{ - if (!strcmp(dev_name(dev), "most")) - return 0; - else - return 1; -} - -static struct bus_type mostbus = { - .name = "most", - .match = most_match, -}; - -static ssize_t links_show(struct device_driver *drv, char *buf) -{ - struct show_links_data d = { .buf = buf }; - - bus_for_each_dev(&mostbus, NULL, &d, print_links); - return d.offs; -} - -static ssize_t components_show(struct device_driver *drv, char *buf) -{ - struct most_component *comp; - int offs = 0; - - list_for_each_entry(comp, &comp_list, list) { - offs += snprintf(buf + offs, PAGE_SIZE - offs, "%s\n", - comp->name); - } - return offs; -} - -/** - * get_channel - get pointer to channel - * @mdev: name of the device interface - * @mdev_ch: name of channel - */ -static struct most_channel *get_channel(char *mdev, char *mdev_ch) -{ - struct device *dev = NULL; - struct most_interface *iface; - struct most_channel *c, *tmp; - - dev = bus_find_device_by_name(&mostbus, NULL, mdev); - if (!dev) - return NULL; - put_device(dev); - iface = dev_get_drvdata(dev); - list_for_each_entry_safe(c, tmp, &iface->p->channel_list, list) { - if (!strcmp(dev_name(&c->dev), mdev_ch)) - return c; - } - return NULL; -} - -static -inline int link_channel_to_component(struct most_channel *c, - struct most_component *comp, - char *name, - char *comp_param) -{ - int ret; - struct most_component **comp_ptr; - - if (!c->pipe0.comp) - comp_ptr = &c->pipe0.comp; - else if (!c->pipe1.comp) - comp_ptr = &c->pipe1.comp; - else - return -ENOSPC; - - *comp_ptr = comp; - ret = comp->probe_channel(c->iface, c->channel_id, &c->cfg, name, - comp_param); - if (ret) { - *comp_ptr = NULL; - return ret; - } - return 0; -} - -int most_set_cfg_buffer_size(char *mdev, char *mdev_ch, u16 val) -{ - struct most_channel *c = get_channel(mdev, mdev_ch); - - if (!c) - return -ENODEV; - c->cfg.buffer_size = val; - return 0; -} - -int most_set_cfg_subbuffer_size(char *mdev, char *mdev_ch, u16 val) -{ - struct most_channel *c = get_channel(mdev, mdev_ch); - - if (!c) - return -ENODEV; - c->cfg.subbuffer_size = val; - return 0; -} - -int most_set_cfg_dbr_size(char *mdev, char *mdev_ch, u16 val) -{ - struct most_channel *c = get_channel(mdev, mdev_ch); - - if (!c) - return -ENODEV; - c->cfg.dbr_size = val; - return 0; -} - -int most_set_cfg_num_buffers(char *mdev, char *mdev_ch, u16 val) -{ - struct most_channel *c = get_channel(mdev, mdev_ch); - - if (!c) - return -ENODEV; - c->cfg.num_buffers = val; - return 0; -} - -int most_set_cfg_datatype(char *mdev, char *mdev_ch, char *buf) -{ - int i; - struct most_channel *c = get_channel(mdev, mdev_ch); - - if (!c) - return -ENODEV; - for (i = 0; i < ARRAY_SIZE(ch_data_type); i++) { - if (!strcmp(buf, ch_data_type[i].name)) { - c->cfg.data_type = ch_data_type[i].most_ch_data_type; - break; - } - } - - if (i == ARRAY_SIZE(ch_data_type)) - dev_warn(&c->dev, "Invalid attribute settings\n"); - return 0; -} - -int most_set_cfg_direction(char *mdev, char *mdev_ch, char *buf) -{ - struct most_channel *c = get_channel(mdev, mdev_ch); - - if (!c) - return -ENODEV; - if (!strcmp(buf, "dir_rx")) { - c->cfg.direction = MOST_CH_RX; - } else if (!strcmp(buf, "rx")) { - c->cfg.direction = MOST_CH_RX; - } else if (!strcmp(buf, "dir_tx")) { - c->cfg.direction = MOST_CH_TX; - } else if (!strcmp(buf, "tx")) { - c->cfg.direction = MOST_CH_TX; - } else { - dev_err(&c->dev, "Invalid direction\n"); - return -ENODATA; - } - return 0; -} - -int most_set_cfg_packets_xact(char *mdev, char *mdev_ch, u16 val) -{ - struct most_channel *c = get_channel(mdev, mdev_ch); - - if (!c) - return -ENODEV; - c->cfg.packets_per_xact = val; - return 0; -} - -int most_cfg_complete(char *comp_name) -{ - struct most_component *comp; - - comp = match_component(comp_name); - if (!comp) - return -ENODEV; - - return comp->cfg_complete(); -} - -int most_add_link(char *mdev, char *mdev_ch, char *comp_name, char *link_name, - char *comp_param) -{ - struct most_channel *c = get_channel(mdev, mdev_ch); - struct most_component *comp = match_component(comp_name); - - if (!c || !comp) - return -ENODEV; - - return link_channel_to_component(c, comp, link_name, comp_param); -} - -int most_remove_link(char *mdev, char *mdev_ch, char *comp_name) -{ - struct most_channel *c; - struct most_component *comp; - - comp = match_component(comp_name); - if (!comp) - return -ENODEV; - c = get_channel(mdev, mdev_ch); - if (!c) - return -ENODEV; - - if (comp->disconnect_channel(c->iface, c->channel_id)) - return -EIO; - if (c->pipe0.comp == comp) - c->pipe0.comp = NULL; - if (c->pipe1.comp == comp) - c->pipe1.comp = NULL; - return 0; -} - -#define DRV_ATTR(_name) (&driver_attr_##_name.attr) - -static DRIVER_ATTR_RO(links); -static DRIVER_ATTR_RO(components); - -static struct attribute *mc_attrs[] = { - DRV_ATTR(links), - DRV_ATTR(components), - NULL, -}; - -static struct attribute_group mc_attr_group = { - .attrs = mc_attrs, -}; - -static const struct attribute_group *mc_attr_groups[] = { - &mc_attr_group, - NULL, -}; - -static struct device_driver mostbus_driver = { - .name = "most_core", - .bus = &mostbus, - .groups = mc_attr_groups, -}; - -static inline void trash_mbo(struct mbo *mbo) -{ - unsigned long flags; - struct most_channel *c = mbo->context; - - spin_lock_irqsave(&c->fifo_lock, flags); - list_add(&mbo->list, &c->trash_fifo); - spin_unlock_irqrestore(&c->fifo_lock, flags); -} - -static bool hdm_mbo_ready(struct most_channel *c) -{ - bool empty; - - if (c->enqueue_halt) - return false; - - spin_lock_irq(&c->fifo_lock); - empty = list_empty(&c->halt_fifo); - spin_unlock_irq(&c->fifo_lock); - - return !empty; -} - -static void nq_hdm_mbo(struct mbo *mbo) -{ - unsigned long flags; - struct most_channel *c = mbo->context; - - spin_lock_irqsave(&c->fifo_lock, flags); - list_add_tail(&mbo->list, &c->halt_fifo); - spin_unlock_irqrestore(&c->fifo_lock, flags); - wake_up_interruptible(&c->hdm_fifo_wq); -} - -static int hdm_enqueue_thread(void *data) -{ - struct most_channel *c = data; - struct mbo *mbo; - int ret; - typeof(c->iface->enqueue) enqueue = c->iface->enqueue; - - while (likely(!kthread_should_stop())) { - wait_event_interruptible(c->hdm_fifo_wq, - hdm_mbo_ready(c) || - kthread_should_stop()); - - mutex_lock(&c->nq_mutex); - spin_lock_irq(&c->fifo_lock); - if (unlikely(c->enqueue_halt || list_empty(&c->halt_fifo))) { - spin_unlock_irq(&c->fifo_lock); - mutex_unlock(&c->nq_mutex); - continue; - } - - mbo = list_pop_mbo(&c->halt_fifo); - spin_unlock_irq(&c->fifo_lock); - - if (c->cfg.direction == MOST_CH_RX) - mbo->buffer_length = c->cfg.buffer_size; - - ret = enqueue(mbo->ifp, mbo->hdm_channel_id, mbo); - mutex_unlock(&c->nq_mutex); - - if (unlikely(ret)) { - dev_err(&c->dev, "Buffer enqueue failed\n"); - nq_hdm_mbo(mbo); - c->hdm_enqueue_task = NULL; - return 0; - } - } - - return 0; -} - -static int run_enqueue_thread(struct most_channel *c, int channel_id) -{ - struct task_struct *task = - kthread_run(hdm_enqueue_thread, c, "hdm_fifo_%d", - channel_id); - - if (IS_ERR(task)) - return PTR_ERR(task); - - c->hdm_enqueue_task = task; - return 0; -} - -/** - * arm_mbo - recycle MBO for further usage - * @mbo: most buffer - * - * This puts an MBO back to the list to have it ready for up coming - * tx transactions. - * - * In case the MBO belongs to a channel that recently has been - * poisoned, the MBO is scheduled to be trashed. - * Calls the completion handler of an attached component. - */ -static void arm_mbo(struct mbo *mbo) -{ - unsigned long flags; - struct most_channel *c; - - c = mbo->context; - - if (c->is_poisoned) { - trash_mbo(mbo); - return; - } - - spin_lock_irqsave(&c->fifo_lock, flags); - ++*mbo->num_buffers_ptr; - list_add_tail(&mbo->list, &c->fifo); - spin_unlock_irqrestore(&c->fifo_lock, flags); - - if (c->pipe0.refs && c->pipe0.comp->tx_completion) - c->pipe0.comp->tx_completion(c->iface, c->channel_id); - - if (c->pipe1.refs && c->pipe1.comp->tx_completion) - c->pipe1.comp->tx_completion(c->iface, c->channel_id); -} - -/** - * arm_mbo_chain - helper function that arms an MBO chain for the HDM - * @c: pointer to interface channel - * @dir: direction of the channel - * @compl: pointer to completion function - * - * This allocates buffer objects including the containing DMA coherent - * buffer and puts them in the fifo. - * Buffers of Rx channels are put in the kthread fifo, hence immediately - * submitted to the HDM. - * - * Returns the number of allocated and enqueued MBOs. - */ -static int arm_mbo_chain(struct most_channel *c, int dir, - void (*compl)(struct mbo *)) -{ - unsigned int i; - struct mbo *mbo; - unsigned long flags; - u32 coherent_buf_size = c->cfg.buffer_size + c->cfg.extra_len; - - atomic_set(&c->mbo_nq_level, 0); - - for (i = 0; i < c->cfg.num_buffers; i++) { - mbo = kzalloc(sizeof(*mbo), GFP_KERNEL); - if (!mbo) - goto flush_fifos; - - mbo->context = c; - mbo->ifp = c->iface; - mbo->hdm_channel_id = c->channel_id; - if (c->iface->dma_alloc) { - mbo->virt_address = - c->iface->dma_alloc(mbo, coherent_buf_size); - } else { - mbo->virt_address = - kzalloc(coherent_buf_size, GFP_KERNEL); - } - if (!mbo->virt_address) - goto release_mbo; - - mbo->complete = compl; - mbo->num_buffers_ptr = &dummy_num_buffers; - if (dir == MOST_CH_RX) { - nq_hdm_mbo(mbo); - atomic_inc(&c->mbo_nq_level); - } else { - spin_lock_irqsave(&c->fifo_lock, flags); - list_add_tail(&mbo->list, &c->fifo); - spin_unlock_irqrestore(&c->fifo_lock, flags); - } - } - return c->cfg.num_buffers; - -release_mbo: - kfree(mbo); - -flush_fifos: - flush_channel_fifos(c); - return 0; -} - -/** - * most_submit_mbo - submits an MBO to fifo - * @mbo: most buffer - */ -void most_submit_mbo(struct mbo *mbo) -{ - if (WARN_ONCE(!mbo || !mbo->context, - "Bad buffer or missing channel reference\n")) - return; - - nq_hdm_mbo(mbo); -} -EXPORT_SYMBOL_GPL(most_submit_mbo); - -/** - * most_write_completion - write completion handler - * @mbo: most buffer - * - * This recycles the MBO for further usage. In case the channel has been - * poisoned, the MBO is scheduled to be trashed. - */ -static void most_write_completion(struct mbo *mbo) -{ - struct most_channel *c; - - c = mbo->context; - if (unlikely(c->is_poisoned || (mbo->status == MBO_E_CLOSE))) - trash_mbo(mbo); - else - arm_mbo(mbo); -} - -int channel_has_mbo(struct most_interface *iface, int id, - struct most_component *comp) -{ - struct most_channel *c = iface->p->channel[id]; - unsigned long flags; - int empty; - - if (unlikely(!c)) - return -EINVAL; - - if (c->pipe0.refs && c->pipe1.refs && - ((comp == c->pipe0.comp && c->pipe0.num_buffers <= 0) || - (comp == c->pipe1.comp && c->pipe1.num_buffers <= 0))) - return 0; - - spin_lock_irqsave(&c->fifo_lock, flags); - empty = list_empty(&c->fifo); - spin_unlock_irqrestore(&c->fifo_lock, flags); - return !empty; -} -EXPORT_SYMBOL_GPL(channel_has_mbo); - -/** - * most_get_mbo - get pointer to an MBO of pool - * @iface: pointer to interface instance - * @id: channel ID - * @comp: driver component - * - * This attempts to get a free buffer out of the channel fifo. - * Returns a pointer to MBO on success or NULL otherwise. - */ -struct mbo *most_get_mbo(struct most_interface *iface, int id, - struct most_component *comp) -{ - struct mbo *mbo; - struct most_channel *c; - unsigned long flags; - int *num_buffers_ptr; - - c = iface->p->channel[id]; - if (unlikely(!c)) - return NULL; - - if (c->pipe0.refs && c->pipe1.refs && - ((comp == c->pipe0.comp && c->pipe0.num_buffers <= 0) || - (comp == c->pipe1.comp && c->pipe1.num_buffers <= 0))) - return NULL; - - if (comp == c->pipe0.comp) - num_buffers_ptr = &c->pipe0.num_buffers; - else if (comp == c->pipe1.comp) - num_buffers_ptr = &c->pipe1.num_buffers; - else - num_buffers_ptr = &dummy_num_buffers; - - spin_lock_irqsave(&c->fifo_lock, flags); - if (list_empty(&c->fifo)) { - spin_unlock_irqrestore(&c->fifo_lock, flags); - return NULL; - } - mbo = list_pop_mbo(&c->fifo); - --*num_buffers_ptr; - spin_unlock_irqrestore(&c->fifo_lock, flags); - - mbo->num_buffers_ptr = num_buffers_ptr; - mbo->buffer_length = c->cfg.buffer_size; - return mbo; -} -EXPORT_SYMBOL_GPL(most_get_mbo); - -/** - * most_put_mbo - return buffer to pool - * @mbo: most buffer - */ -void most_put_mbo(struct mbo *mbo) -{ - struct most_channel *c = mbo->context; - - if (c->cfg.direction == MOST_CH_TX) { - arm_mbo(mbo); - return; - } - nq_hdm_mbo(mbo); - atomic_inc(&c->mbo_nq_level); -} -EXPORT_SYMBOL_GPL(most_put_mbo); - -/** - * most_read_completion - read completion handler - * @mbo: most buffer - * - * This function is called by the HDM when data has been received from the - * hardware and copied to the buffer of the MBO. - * - * In case the channel has been poisoned it puts the buffer in the trash queue. - * Otherwise, it passes the buffer to an component for further processing. - */ -static void most_read_completion(struct mbo *mbo) -{ - struct most_channel *c = mbo->context; - - if (unlikely(c->is_poisoned || (mbo->status == MBO_E_CLOSE))) { - trash_mbo(mbo); - return; - } - - if (mbo->status == MBO_E_INVAL) { - nq_hdm_mbo(mbo); - atomic_inc(&c->mbo_nq_level); - return; - } - - if (atomic_sub_and_test(1, &c->mbo_nq_level)) - c->is_starving = 1; - - if (c->pipe0.refs && c->pipe0.comp->rx_completion && - c->pipe0.comp->rx_completion(mbo) == 0) - return; - - if (c->pipe1.refs && c->pipe1.comp->rx_completion && - c->pipe1.comp->rx_completion(mbo) == 0) - return; - - most_put_mbo(mbo); -} - -/** - * most_start_channel - prepares a channel for communication - * @iface: pointer to interface instance - * @id: channel ID - * @comp: driver component - * - * This prepares the channel for usage. Cross-checks whether the - * channel's been properly configured. - * - * Returns 0 on success or error code otherwise. - */ -int most_start_channel(struct most_interface *iface, int id, - struct most_component *comp) -{ - int num_buffer; - int ret; - struct most_channel *c = iface->p->channel[id]; - - if (unlikely(!c)) - return -EINVAL; - - mutex_lock(&c->start_mutex); - if (c->pipe0.refs + c->pipe1.refs > 0) - goto out; /* already started by another component */ - - if (!try_module_get(iface->mod)) { - dev_err(&c->dev, "Failed to acquire HDM lock\n"); - mutex_unlock(&c->start_mutex); - return -ENOLCK; - } - - c->cfg.extra_len = 0; - if (c->iface->configure(c->iface, c->channel_id, &c->cfg)) { - dev_err(&c->dev, "Channel configuration failed. Go check settings...\n"); - ret = -EINVAL; - goto err_put_module; - } - - init_waitqueue_head(&c->hdm_fifo_wq); - - if (c->cfg.direction == MOST_CH_RX) - num_buffer = arm_mbo_chain(c, c->cfg.direction, - most_read_completion); - else - num_buffer = arm_mbo_chain(c, c->cfg.direction, - most_write_completion); - if (unlikely(!num_buffer)) { - ret = -ENOMEM; - goto err_put_module; - } - - ret = run_enqueue_thread(c, id); - if (ret) - goto err_put_module; - - c->is_starving = 0; - c->pipe0.num_buffers = c->cfg.num_buffers / 2; - c->pipe1.num_buffers = c->cfg.num_buffers - c->pipe0.num_buffers; - atomic_set(&c->mbo_ref, num_buffer); - -out: - if (comp == c->pipe0.comp) - c->pipe0.refs++; - if (comp == c->pipe1.comp) - c->pipe1.refs++; - mutex_unlock(&c->start_mutex); - return 0; - -err_put_module: - module_put(iface->mod); - mutex_unlock(&c->start_mutex); - return ret; -} -EXPORT_SYMBOL_GPL(most_start_channel); - -/** - * most_stop_channel - stops a running channel - * @iface: pointer to interface instance - * @id: channel ID - * @comp: driver component - */ -int most_stop_channel(struct most_interface *iface, int id, - struct most_component *comp) -{ - struct most_channel *c; - - if (unlikely((!iface) || (id >= iface->num_channels) || (id < 0))) { - pr_err("Bad interface or index out of range\n"); - return -EINVAL; - } - c = iface->p->channel[id]; - if (unlikely(!c)) - return -EINVAL; - - mutex_lock(&c->start_mutex); - if (c->pipe0.refs + c->pipe1.refs >= 2) - goto out; - - if (c->hdm_enqueue_task) - kthread_stop(c->hdm_enqueue_task); - c->hdm_enqueue_task = NULL; - - if (iface->mod) - module_put(iface->mod); - - c->is_poisoned = true; - if (c->iface->poison_channel(c->iface, c->channel_id)) { - dev_err(&c->dev, "Failed to stop channel %d of interface %s\n", c->channel_id, - c->iface->description); - mutex_unlock(&c->start_mutex); - return -EAGAIN; - } - flush_trash_fifo(c); - flush_channel_fifos(c); - -#ifdef CMPL_INTERRUPTIBLE - if (wait_for_completion_interruptible(&c->cleanup)) { - dev_err(&c->dev, "Interrupted while cleaning up channel %d\n", c->channel_id); - mutex_unlock(&c->start_mutex); - return -EINTR; - } -#else - wait_for_completion(&c->cleanup); -#endif - c->is_poisoned = false; - -out: - if (comp == c->pipe0.comp) - c->pipe0.refs--; - if (comp == c->pipe1.comp) - c->pipe1.refs--; - mutex_unlock(&c->start_mutex); - return 0; -} -EXPORT_SYMBOL_GPL(most_stop_channel); - -/** - * most_register_component - registers a driver component with the core - * @comp: driver component - */ -int most_register_component(struct most_component *comp) -{ - if (!comp) { - pr_err("Bad component\n"); - return -EINVAL; - } - list_add_tail(&comp->list, &comp_list); - return 0; -} -EXPORT_SYMBOL_GPL(most_register_component); - -static int disconnect_channels(struct device *dev, void *data) -{ - struct most_interface *iface; - struct most_channel *c, *tmp; - struct most_component *comp = data; - - iface = dev_get_drvdata(dev); - list_for_each_entry_safe(c, tmp, &iface->p->channel_list, list) { - if (c->pipe0.comp == comp || c->pipe1.comp == comp) - comp->disconnect_channel(c->iface, c->channel_id); - if (c->pipe0.comp == comp) - c->pipe0.comp = NULL; - if (c->pipe1.comp == comp) - c->pipe1.comp = NULL; - } - return 0; -} - -/** - * most_deregister_component - deregisters a driver component with the core - * @comp: driver component - */ -int most_deregister_component(struct most_component *comp) -{ - if (!comp) { - pr_err("Bad component\n"); - return -EINVAL; - } - - bus_for_each_dev(&mostbus, NULL, comp, disconnect_channels); - list_del(&comp->list); - return 0; -} -EXPORT_SYMBOL_GPL(most_deregister_component); - -static void release_channel(struct device *dev) -{ - struct most_channel *c = to_channel(dev); - - kfree(c); -} - -/** - * most_register_interface - registers an interface with core - * @iface: device interface - * - * Allocates and initializes a new interface instance and all of its channels. - * Returns a pointer to kobject or an error pointer. - */ -int most_register_interface(struct most_interface *iface) -{ - unsigned int i; - int id; - struct most_channel *c; - - if (!iface || !iface->enqueue || !iface->configure || - !iface->poison_channel || (iface->num_channels > MAX_CHANNELS)) { - dev_err(iface->dev, "Bad interface or channel overflow\n"); - return -EINVAL; - } - - id = ida_simple_get(&mdev_id, 0, 0, GFP_KERNEL); - if (id < 0) { - dev_err(iface->dev, "Failed to allocate device ID\n"); - return id; - } - - iface->p = kzalloc(sizeof(*iface->p), GFP_KERNEL); - if (!iface->p) { - ida_simple_remove(&mdev_id, id); - return -ENOMEM; - } - - INIT_LIST_HEAD(&iface->p->channel_list); - iface->p->dev_id = id; - strscpy(iface->p->name, iface->description, sizeof(iface->p->name)); - iface->dev->bus = &mostbus; - iface->dev->groups = interface_attr_groups; - dev_set_drvdata(iface->dev, iface); - if (device_register(iface->dev)) { - dev_err(iface->dev, "Failed to register interface device\n"); - kfree(iface->p); - put_device(iface->dev); - ida_simple_remove(&mdev_id, id); - return -ENOMEM; - } - - for (i = 0; i < iface->num_channels; i++) { - const char *name_suffix = iface->channel_vector[i].name_suffix; - - c = kzalloc(sizeof(*c), GFP_KERNEL); - if (!c) - goto err_free_resources; - if (!name_suffix) - snprintf(c->name, STRING_SIZE, "ch%d", i); - else - snprintf(c->name, STRING_SIZE, "%s", name_suffix); - c->dev.init_name = c->name; - c->dev.parent = iface->dev; - c->dev.groups = channel_attr_groups; - c->dev.release = release_channel; - iface->p->channel[i] = c; - c->is_starving = 0; - c->iface = iface; - c->channel_id = i; - c->keep_mbo = false; - c->enqueue_halt = false; - c->is_poisoned = false; - c->cfg.direction = 0; - c->cfg.data_type = 0; - c->cfg.num_buffers = 0; - c->cfg.buffer_size = 0; - c->cfg.subbuffer_size = 0; - c->cfg.packets_per_xact = 0; - spin_lock_init(&c->fifo_lock); - INIT_LIST_HEAD(&c->fifo); - INIT_LIST_HEAD(&c->trash_fifo); - INIT_LIST_HEAD(&c->halt_fifo); - init_completion(&c->cleanup); - atomic_set(&c->mbo_ref, 0); - mutex_init(&c->start_mutex); - mutex_init(&c->nq_mutex); - list_add_tail(&c->list, &iface->p->channel_list); - if (device_register(&c->dev)) { - dev_err(&c->dev, "Failed to register channel device\n"); - goto err_free_most_channel; - } - } - most_interface_register_notify(iface->description); - return 0; - -err_free_most_channel: - put_device(&c->dev); - -err_free_resources: - while (i > 0) { - c = iface->p->channel[--i]; - device_unregister(&c->dev); - } - kfree(iface->p); - device_unregister(iface->dev); - ida_simple_remove(&mdev_id, id); - return -ENOMEM; -} -EXPORT_SYMBOL_GPL(most_register_interface); - -/** - * most_deregister_interface - deregisters an interface with core - * @iface: device interface - * - * Before removing an interface instance from the list, all running - * channels are stopped and poisoned. - */ -void most_deregister_interface(struct most_interface *iface) -{ - int i; - struct most_channel *c; - - for (i = 0; i < iface->num_channels; i++) { - c = iface->p->channel[i]; - if (c->pipe0.comp) - c->pipe0.comp->disconnect_channel(c->iface, - c->channel_id); - if (c->pipe1.comp) - c->pipe1.comp->disconnect_channel(c->iface, - c->channel_id); - c->pipe0.comp = NULL; - c->pipe1.comp = NULL; - list_del(&c->list); - device_unregister(&c->dev); - } - - ida_simple_remove(&mdev_id, iface->p->dev_id); - kfree(iface->p); - device_unregister(iface->dev); -} -EXPORT_SYMBOL_GPL(most_deregister_interface); - -/** - * most_stop_enqueue - prevents core from enqueueing MBOs - * @iface: pointer to interface - * @id: channel id - * - * This is called by an HDM that _cannot_ attend to its duties and - * is imminent to get run over by the core. The core is not going to - * enqueue any further packets unless the flagging HDM calls - * most_resume enqueue(). - */ -void most_stop_enqueue(struct most_interface *iface, int id) -{ - struct most_channel *c = iface->p->channel[id]; - - if (!c) - return; - - mutex_lock(&c->nq_mutex); - c->enqueue_halt = true; - mutex_unlock(&c->nq_mutex); -} -EXPORT_SYMBOL_GPL(most_stop_enqueue); - -/** - * most_resume_enqueue - allow core to enqueue MBOs again - * @iface: pointer to interface - * @id: channel id - * - * This clears the enqueue halt flag and enqueues all MBOs currently - * sitting in the wait fifo. - */ -void most_resume_enqueue(struct most_interface *iface, int id) -{ - struct most_channel *c = iface->p->channel[id]; - - if (!c) - return; - - mutex_lock(&c->nq_mutex); - c->enqueue_halt = false; - mutex_unlock(&c->nq_mutex); - - wake_up_interruptible(&c->hdm_fifo_wq); -} -EXPORT_SYMBOL_GPL(most_resume_enqueue); - -static int __init most_init(void) -{ - int err; - - INIT_LIST_HEAD(&comp_list); - ida_init(&mdev_id); - - err = bus_register(&mostbus); - if (err) { - pr_err("Failed to register most bus\n"); - return err; - } - err = driver_register(&mostbus_driver); - if (err) { - pr_err("Failed to register core driver\n"); - goto err_unregister_bus; - } - configfs_init(); - return 0; - -err_unregister_bus: - bus_unregister(&mostbus); - return err; -} - -static void __exit most_exit(void) -{ - driver_unregister(&mostbus_driver); - bus_unregister(&mostbus); - ida_destroy(&mdev_id); -} - -module_init(most_init); -module_exit(most_exit); -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Christian Gromm <christian.gromm@microchip.com>"); -MODULE_DESCRIPTION("Core module of stacked MOST Linux driver"); diff --git a/drivers/staging/most/dim2/dim2.c b/drivers/staging/most/dim2/dim2.c index 16593281fcda..8e0f27e61652 100644 --- a/drivers/staging/most/dim2/dim2.c +++ b/drivers/staging/most/dim2/dim2.c @@ -20,8 +20,7 @@ #include <linux/dma-mapping.h> #include <linux/sched.h> #include <linux/kthread.h> - -#include "../most.h" +#include <linux/most.h> #include "hal.h" #include "errors.h" #include "sysfs.h" diff --git a/drivers/staging/most/i2c/i2c.c b/drivers/staging/most/i2c/i2c.c index 2980f7065846..893a8babdb2f 100644 --- a/drivers/staging/most/i2c/i2c.c +++ b/drivers/staging/most/i2c/i2c.c @@ -13,8 +13,7 @@ #include <linux/i2c.h> #include <linux/interrupt.h> #include <linux/err.h> - -#include "../most.h" +#include <linux/most.h> enum { CH_RX, CH_TX, NUM_CHANNELS }; diff --git a/drivers/staging/most/most.h b/drivers/staging/most/most.h deleted file mode 100644 index 232e01b7f5d2..000000000000 --- a/drivers/staging/most/most.h +++ /dev/null @@ -1,337 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* - * most.h - API for component and adapter drivers - * - * Copyright (C) 2013-2015, Microchip Technology Germany II GmbH & Co. KG - */ - -#ifndef __MOST_CORE_H__ -#define __MOST_CORE_H__ - -#include <linux/types.h> -#include <linux/device.h> - -struct module; -struct interface_private; - -/** - * Interface type - */ -enum most_interface_type { - ITYPE_LOOPBACK = 1, - ITYPE_I2C, - ITYPE_I2S, - ITYPE_TSI, - ITYPE_HBI, - ITYPE_MEDIALB_DIM, - ITYPE_MEDIALB_DIM2, - ITYPE_USB, - ITYPE_PCIE -}; - -/** - * Channel direction. - */ -enum most_channel_direction { - MOST_CH_RX = 1 << 0, - MOST_CH_TX = 1 << 1, -}; - -/** - * Channel data type. - */ -enum most_channel_data_type { - MOST_CH_CONTROL = 1 << 0, - MOST_CH_ASYNC = 1 << 1, - MOST_CH_ISOC = 1 << 2, - MOST_CH_SYNC = 1 << 5, -}; - -enum most_status_flags { - /* MBO was processed successfully (data was send or received )*/ - MBO_SUCCESS = 0, - /* The MBO contains wrong or missing information. */ - MBO_E_INVAL, - /* MBO was completed as HDM Channel will be closed */ - MBO_E_CLOSE, -}; - -/** - * struct most_channel_capability - Channel capability - * @direction: Supported channel directions. - * The value is bitwise OR-combination of the values from the - * enumeration most_channel_direction. Zero is allowed value and means - * "channel may not be used". - * @data_type: Supported channel data types. - * The value is bitwise OR-combination of the values from the - * enumeration most_channel_data_type. Zero is allowed value and means - * "channel may not be used". - * @num_buffers_packet: Maximum number of buffers supported by this channel - * for packet data types (Async,Control,QoS) - * @buffer_size_packet: Maximum buffer size supported by this channel - * for packet data types (Async,Control,QoS) - * @num_buffers_streaming: Maximum number of buffers supported by this channel - * for streaming data types (Sync,AV Packetized) - * @buffer_size_streaming: Maximum buffer size supported by this channel - * for streaming data types (Sync,AV Packetized) - * @name_suffix: Optional suffix providean by an HDM that is attached to the - * regular channel name. - * - * Describes the capabilities of a MOST channel like supported Data Types - * and directions. This information is provided by an HDM for the MostCore. - * - * The Core creates read only sysfs attribute files in - * /sys/devices/most/mdev#/<channel>/ with the - * following attributes: - * -available_directions - * -available_datatypes - * -number_of_packet_buffers - * -number_of_stream_buffers - * -size_of_packet_buffer - * -size_of_stream_buffer - * where content of each file is a string with all supported properties of this - * very channel attribute. - */ -struct most_channel_capability { - u16 direction; - u16 data_type; - u16 num_buffers_packet; - u16 buffer_size_packet; - u16 num_buffers_streaming; - u16 buffer_size_streaming; - const char *name_suffix; -}; - -/** - * struct most_channel_config - stores channel configuration - * @direction: direction of the channel - * @data_type: data type travelling over this channel - * @num_buffers: number of buffers - * @buffer_size: size of a buffer for AIM. - * Buffer size may be cutted down by HDM in a configure callback - * to match to a given interface and channel type. - * @extra_len: additional buffer space for internal HDM purposes like padding. - * May be set by HDM in a configure callback if needed. - * @subbuffer_size: size of a subbuffer - * @packets_per_xact: number of MOST frames that are packet inside one USB - * packet. This is USB specific - * - * Describes the configuration for a MOST channel. This information is - * provided from the MostCore to a HDM (like the Medusa PCIe Interface) as a - * parameter of the "configure" function call. - */ -struct most_channel_config { - enum most_channel_direction direction; - enum most_channel_data_type data_type; - u16 num_buffers; - u16 buffer_size; - u16 extra_len; - u16 subbuffer_size; - u16 packets_per_xact; - u16 dbr_size; -}; - -/* - * struct mbo - MOST Buffer Object. - * @context: context for core completion handler - * @priv: private data for HDM - * - * public: documented fields that are used for the communications - * between MostCore and HDMs - * - * @list: list head for use by the mbo's current owner - * @ifp: (in) associated interface instance - * @num_buffers_ptr: amount of pool buffers - * @hdm_channel_id: (in) HDM channel instance - * @virt_address: (in) kernel virtual address of the buffer - * @bus_address: (in) bus address of the buffer - * @buffer_length: (in) buffer payload length - * @processed_length: (out) processed length - * @status: (out) transfer status - * @complete: (in) completion routine - * - * The core allocates and initializes the MBO. - * - * The HDM receives MBO for transfer from the core with the call to enqueue(). - * The HDM copies the data to- or from the buffer depending on configured - * channel direction, set "processed_length" and "status" and completes - * the transfer procedure by calling the completion routine. - * - * Finally, the MBO is being deallocated or recycled for further - * transfers of the same or a different HDM. - * - * Directions of usage: - * The core driver should never access any MBO fields (even if marked - * as "public") while the MBO is owned by an HDM. The ownership starts with - * the call of enqueue() and ends with the call of its complete() routine. - * - * II. - * Every HDM attached to the core driver _must_ ensure that it returns any MBO - * it owns (due to a previous call to enqueue() by the core driver) before it - * de-registers an interface or gets unloaded from the kernel. If this direction - * is violated memory leaks will occur, since the core driver does _not_ track - * MBOs it is currently not in control of. - * - */ -struct mbo { - void *context; - void *priv; - struct list_head list; - struct most_interface *ifp; - int *num_buffers_ptr; - u16 hdm_channel_id; - void *virt_address; - dma_addr_t bus_address; - u16 buffer_length; - u16 processed_length; - enum most_status_flags status; - void (*complete)(struct mbo *mbo); -}; - -/** - * Interface instance description. - * - * Describes an interface of a MOST device the core driver is bound to. - * This structure is allocated and initialized in the HDM. MostCore may not - * modify this structure. - * - * @dev: the actual device - * @mod: module - * @interface Interface type. \sa most_interface_type. - * @description PRELIMINARY. - * Unique description of the device instance from point of view of the - * interface in free text form (ASCII). - * It may be a hexadecimal presentation of the memory address for the MediaLB - * IP or USB device ID with USB properties for USB interface, etc. - * @num_channels Number of channels and size of the channel_vector. - * @channel_vector Properties of the channels. - * Array index represents channel ID by the driver. - * @configure Callback to change data type for the channel of the - * interface instance. May be zero if the instance of the interface is not - * configurable. Parameter channel_config describes direction and data - * type for the channel, configured by the higher level. The content of - * @enqueue Delivers MBO to the HDM for processing. - * After HDM completes Rx- or Tx- operation the processed MBO shall - * be returned back to the MostCore using completion routine. - * The reason to get the MBO delivered from the MostCore after the channel - * is poisoned is the re-opening of the channel by the application. - * In this case the HDM shall hold MBOs and service the channel as usual. - * The HDM must be able to hold at least one MBO for each channel. - * The callback returns a negative value on error, otherwise 0. - * @poison_channel Informs HDM about closing the channel. The HDM shall - * cancel all transfers and synchronously or asynchronously return - * all enqueued for this channel MBOs using the completion routine. - * The callback returns a negative value on error, otherwise 0. - * @request_netinfo: triggers retrieving of network info from the HDM by - * means of "Message exchange over MDP/MEP" - * The call of the function request_netinfo with the parameter on_netinfo as - * NULL prohibits use of the previously obtained function pointer. - * @priv Private field used by mostcore to store context information. - */ -struct most_interface { - struct device *dev; - struct device *driver_dev; - struct module *mod; - enum most_interface_type interface; - const char *description; - unsigned int num_channels; - struct most_channel_capability *channel_vector; - void *(*dma_alloc)(struct mbo *mbo, u32 size); - void (*dma_free)(struct mbo *mbo, u32 size); - int (*configure)(struct most_interface *iface, int channel_idx, - struct most_channel_config *channel_config); - int (*enqueue)(struct most_interface *iface, int channel_idx, - struct mbo *mbo); - int (*poison_channel)(struct most_interface *iface, int channel_idx); - void (*request_netinfo)(struct most_interface *iface, int channel_idx, - void (*on_netinfo)(struct most_interface *iface, - unsigned char link_stat, - unsigned char *mac_addr)); - void *priv; - struct interface_private *p; -}; - -/** - * struct most_component - identifies a loadable component for the mostcore - * @list: list_head - * @name: component name - * @probe_channel: function for core to notify driver about channel connection - * @disconnect_channel: callback function to disconnect a certain channel - * @rx_completion: completion handler for received packets - * @tx_completion: completion handler for transmitted packets - */ -struct most_component { - struct list_head list; - const char *name; - struct module *mod; - int (*probe_channel)(struct most_interface *iface, int channel_idx, - struct most_channel_config *cfg, char *name, - char *param); - int (*disconnect_channel)(struct most_interface *iface, - int channel_idx); - int (*rx_completion)(struct mbo *mbo); - int (*tx_completion)(struct most_interface *iface, int channel_idx); - int (*cfg_complete)(void); -}; - -/** - * most_register_interface - Registers instance of the interface. - * @iface: Pointer to the interface instance description. - * - * Returns a pointer to the kobject of the generated instance. - * - * Note: HDM has to ensure that any reference held on the kobj is - * released before deregistering the interface. - */ -int most_register_interface(struct most_interface *iface); - -/** - * Deregisters instance of the interface. - * @intf_instance Pointer to the interface instance description. - */ -void most_deregister_interface(struct most_interface *iface); -void most_submit_mbo(struct mbo *mbo); - -/** - * most_stop_enqueue - prevents core from enqueing MBOs - * @iface: pointer to interface - * @channel_idx: channel index - */ -void most_stop_enqueue(struct most_interface *iface, int channel_idx); - -/** - * most_resume_enqueue - allow core to enqueue MBOs again - * @iface: pointer to interface - * @channel_idx: channel index - * - * This clears the enqueue halt flag and enqueues all MBOs currently - * in wait fifo. - */ -void most_resume_enqueue(struct most_interface *iface, int channel_idx); -int most_register_component(struct most_component *comp); -int most_deregister_component(struct most_component *comp); -struct mbo *most_get_mbo(struct most_interface *iface, int channel_idx, - struct most_component *comp); -void most_put_mbo(struct mbo *mbo); -int channel_has_mbo(struct most_interface *iface, int channel_idx, - struct most_component *comp); -int most_start_channel(struct most_interface *iface, int channel_idx, - struct most_component *comp); -int most_stop_channel(struct most_interface *iface, int channel_idx, - struct most_component *comp); -int __init configfs_init(void); -int most_register_configfs_subsys(struct most_component *comp); -void most_deregister_configfs_subsys(struct most_component *comp); -int most_add_link(char *mdev, char *mdev_ch, char *comp_name, char *link_name, - char *comp_param); -int most_remove_link(char *mdev, char *mdev_ch, char *comp_name); -int most_set_cfg_buffer_size(char *mdev, char *mdev_ch, u16 val); -int most_set_cfg_subbuffer_size(char *mdev, char *mdev_ch, u16 val); -int most_set_cfg_dbr_size(char *mdev, char *mdev_ch, u16 val); -int most_set_cfg_num_buffers(char *mdev, char *mdev_ch, u16 val); -int most_set_cfg_datatype(char *mdev, char *mdev_ch, char *buf); -int most_set_cfg_direction(char *mdev, char *mdev_ch, char *buf); -int most_set_cfg_packets_xact(char *mdev, char *mdev_ch, u16 val); -int most_cfg_complete(char *comp_name); -void most_interface_register_notify(const char *mdev_name); -#endif /* MOST_CORE_H_ */ diff --git a/drivers/staging/most/net/net.c b/drivers/staging/most/net/net.c index 5547e36e09de..830f089f1a88 100644 --- a/drivers/staging/most/net/net.c +++ b/drivers/staging/most/net/net.c @@ -15,8 +15,7 @@ #include <linux/list.h> #include <linux/wait.h> #include <linux/kobject.h> - -#include "../most.h" +#include <linux/most.h> #define MEP_HDR_LEN 8 #define MDP_HDR_LEN 16 diff --git a/drivers/staging/most/sound/sound.c b/drivers/staging/most/sound/sound.c index 44cf2334834f..1527f410af2b 100644 --- a/drivers/staging/most/sound/sound.c +++ b/drivers/staging/most/sound/sound.c @@ -17,8 +17,7 @@ #include <sound/pcm_params.h> #include <linux/sched.h> #include <linux/kthread.h> - -#include "../most.h" +#include <linux/most.h> #define DRIVER_NAME "sound" #define STRING_SIZE 80 diff --git a/drivers/staging/most/usb/usb.c b/drivers/staging/most/usb/usb.c index 0bda88c4bc89..e8c5a8c98375 100644 --- a/drivers/staging/most/usb/usb.c +++ b/drivers/staging/most/usb/usb.c @@ -23,8 +23,7 @@ #include <linux/dma-mapping.h> #include <linux/etherdevice.h> #include <linux/uaccess.h> - -#include "../most.h" +#include <linux/most.h> #define USB_MTU 512 #define NO_ISOCHRONOUS_URB 0 diff --git a/drivers/staging/most/video/video.c b/drivers/staging/most/video/video.c index d32ae49d617b..829df899b993 100644 --- a/drivers/staging/most/video/video.c +++ b/drivers/staging/most/video/video.c @@ -20,8 +20,7 @@ #include <media/v4l2-device.h> #include <media/v4l2-ctrls.h> #include <media/v4l2-fh.h> - -#include "../most.h" +#include <linux/most.h> #define V4L2_CMP_MAX_INPUT 1 @@ -74,7 +73,7 @@ static int comp_vdev_open(struct file *filp) struct comp_fh *fh; switch (vdev->vfl_type) { - case VFL_TYPE_GRABBER: + case VFL_TYPE_VIDEO: break; default: return -EINVAL; @@ -424,7 +423,7 @@ static int comp_register_videodev(struct most_video_dev *mdev) /* Register the v4l2 device */ video_set_drvdata(mdev->vdev, mdev); - ret = video_register_device(mdev->vdev, VFL_TYPE_GRABBER, -1); + ret = video_register_device(mdev->vdev, VFL_TYPE_VIDEO, -1); if (ret) { v4l2_err(&mdev->v4l2_dev, "video_register_device failed (%d)\n", ret); |