summaryrefslogtreecommitdiffstats
path: root/recipes-kernel/mostcore/files
diff options
context:
space:
mode:
Diffstat (limited to 'recipes-kernel/mostcore/files')
-rw-r--r--recipes-kernel/mostcore/files/COPYING340
-rw-r--r--recipes-kernel/mostcore/files/Makefile17
-rw-r--r--recipes-kernel/mostcore/files/core.c1928
-rw-r--r--recipes-kernel/mostcore/files/mostcore.h320
4 files changed, 0 insertions, 2605 deletions
diff --git a/recipes-kernel/mostcore/files/COPYING b/recipes-kernel/mostcore/files/COPYING
deleted file mode 100644
index 6d45519c8..000000000
--- a/recipes-kernel/mostcore/files/COPYING
+++ /dev/null
@@ -1,340 +0,0 @@
- GNU GENERAL PUBLIC LICENSE
- Version 2, June 1991
-
- Copyright (C) 1989, 1991 Free Software Foundation, Inc.
- 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- Everyone is permitted to copy and distribute verbatim copies
- of this license document, but changing it is not allowed.
-
- Preamble
-
- The licenses for most software are designed to take away your
-freedom to share and change it. By contrast, the GNU General Public
-License is intended to guarantee your freedom to share and change free
-software--to make sure the software is free for all its users. This
-General Public License applies to most of the Free Software
-Foundation's software and to any other program whose authors commit to
-using it. (Some other Free Software Foundation software is covered by
-the GNU Library General Public License instead.) You can apply it to
-your programs, too.
-
- When we speak of free software, we are referring to freedom, not
-price. Our General Public Licenses are designed to make sure that you
-have the freedom to distribute copies of free software (and charge for
-this service if you wish), that you receive source code or can get it
-if you want it, that you can change the software or use pieces of it
-in new free programs; and that you know you can do these things.
-
- To protect your rights, we need to make restrictions that forbid
-anyone to deny you these rights or to ask you to surrender the rights.
-These restrictions translate to certain responsibilities for you if you
-distribute copies of the software, or if you modify it.
-
- For example, if you distribute copies of such a program, whether
-gratis or for a fee, you must give the recipients all the rights that
-you have. You must make sure that they, too, receive or can get the
-source code. And you must show them these terms so they know their
-rights.
-
- We protect your rights with two steps: (1) copyright the software, and
-(2) offer you this license which gives you legal permission to copy,
-distribute and/or modify the software.
-
- Also, for each author's protection and ours, we want to make certain
-that everyone understands that there is no warranty for this free
-software. If the software is modified by someone else and passed on, we
-want its recipients to know that what they have is not the original, so
-that any problems introduced by others will not reflect on the original
-authors' reputations.
-
- Finally, any free program is threatened constantly by software
-patents. We wish to avoid the danger that redistributors of a free
-program will individually obtain patent licenses, in effect making the
-program proprietary. To prevent this, we have made it clear that any
-patent must be licensed for everyone's free use or not licensed at all.
-
- The precise terms and conditions for copying, distribution and
-modification follow.
-
- GNU GENERAL PUBLIC LICENSE
- TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
-
- 0. This License applies to any program or other work which contains
-a notice placed by the copyright holder saying it may be distributed
-under the terms of this General Public License. The "Program", below,
-refers to any such program or work, and a "work based on the Program"
-means either the Program or any derivative work under copyright law:
-that is to say, a work containing the Program or a portion of it,
-either verbatim or with modifications and/or translated into another
-language. (Hereinafter, translation is included without limitation in
-the term "modification".) Each licensee is addressed as "you".
-
-Activities other than copying, distribution and modification are not
-covered by this License; they are outside its scope. The act of
-running the Program is not restricted, and the output from the Program
-is covered only if its contents constitute a work based on the
-Program (independent of having been made by running the Program).
-Whether that is true depends on what the Program does.
-
- 1. You may copy and distribute verbatim copies of the Program's
-source code as you receive it, in any medium, provided that you
-conspicuously and appropriately publish on each copy an appropriate
-copyright notice and disclaimer of warranty; keep intact all the
-notices that refer to this License and to the absence of any warranty;
-and give any other recipients of the Program a copy of this License
-along with the Program.
-
-You may charge a fee for the physical act of transferring a copy, and
-you may at your option offer warranty protection in exchange for a fee.
-
- 2. You may modify your copy or copies of the Program or any portion
-of it, thus forming a work based on the Program, and copy and
-distribute such modifications or work under the terms of Section 1
-above, provided that you also meet all of these conditions:
-
- a) You must cause the modified files to carry prominent notices
- stating that you changed the files and the date of any change.
-
- b) You must cause any work that you distribute or publish, that in
- whole or in part contains or is derived from the Program or any
- part thereof, to be licensed as a whole at no charge to all third
- parties under the terms of this License.
-
- c) If the modified program normally reads commands interactively
- when run, you must cause it, when started running for such
- interactive use in the most ordinary way, to print or display an
- announcement including an appropriate copyright notice and a
- notice that there is no warranty (or else, saying that you provide
- a warranty) and that users may redistribute the program under
- these conditions, and telling the user how to view a copy of this
- License. (Exception: if the Program itself is interactive but
- does not normally print such an announcement, your work based on
- the Program is not required to print an announcement.)
-
-These requirements apply to the modified work as a whole. If
-identifiable sections of that work are not derived from the Program,
-and can be reasonably considered independent and separate works in
-themselves, then this License, and its terms, do not apply to those
-sections when you distribute them as separate works. But when you
-distribute the same sections as part of a whole which is a work based
-on the Program, the distribution of the whole must be on the terms of
-this License, whose permissions for other licensees extend to the
-entire whole, and thus to each and every part regardless of who wrote it.
-
-Thus, it is not the intent of this section to claim rights or contest
-your rights to work written entirely by you; rather, the intent is to
-exercise the right to control the distribution of derivative or
-collective works based on the Program.
-
-In addition, mere aggregation of another work not based on the Program
-with the Program (or with a work based on the Program) on a volume of
-a storage or distribution medium does not bring the other work under
-the scope of this License.
-
- 3. You may copy and distribute the Program (or a work based on it,
-under Section 2) in object code or executable form under the terms of
-Sections 1 and 2 above provided that you also do one of the following:
-
- a) Accompany it with the complete corresponding machine-readable
- source code, which must be distributed under the terms of Sections
- 1 and 2 above on a medium customarily used for software interchange; or,
-
- b) Accompany it with a written offer, valid for at least three
- years, to give any third party, for a charge no more than your
- cost of physically performing source distribution, a complete
- machine-readable copy of the corresponding source code, to be
- distributed under the terms of Sections 1 and 2 above on a medium
- customarily used for software interchange; or,
-
- c) Accompany it with the information you received as to the offer
- to distribute corresponding source code. (This alternative is
- allowed only for noncommercial distribution and only if you
- received the program in object code or executable form with such
- an offer, in accord with Subsection b above.)
-
-The source code for a work means the preferred form of the work for
-making modifications to it. For an executable work, complete source
-code means all the source code for all modules it contains, plus any
-associated interface definition files, plus the scripts used to
-control compilation and installation of the executable. However, as a
-special exception, the source code distributed need not include
-anything that is normally distributed (in either source or binary
-form) with the major components (compiler, kernel, and so on) of the
-operating system on which the executable runs, unless that component
-itself accompanies the executable.
-
-If distribution of executable or object code is made by offering
-access to copy from a designated place, then offering equivalent
-access to copy the source code from the same place counts as
-distribution of the source code, even though third parties are not
-compelled to copy the source along with the object code.
-
- 4. You may not copy, modify, sublicense, or distribute the Program
-except as expressly provided under this License. Any attempt
-otherwise to copy, modify, sublicense or distribute the Program is
-void, and will automatically terminate your rights under this License.
-However, parties who have received copies, or rights, from you under
-this License will not have their licenses terminated so long as such
-parties remain in full compliance.
-
- 5. You are not required to accept this License, since you have not
-signed it. However, nothing else grants you permission to modify or
-distribute the Program or its derivative works. These actions are
-prohibited by law if you do not accept this License. Therefore, by
-modifying or distributing the Program (or any work based on the
-Program), you indicate your acceptance of this License to do so, and
-all its terms and conditions for copying, distributing or modifying
-the Program or works based on it.
-
- 6. Each time you redistribute the Program (or any work based on the
-Program), the recipient automatically receives a license from the
-original licensor to copy, distribute or modify the Program subject to
-these terms and conditions. You may not impose any further
-restrictions on the recipients' exercise of the rights granted herein.
-You are not responsible for enforcing compliance by third parties to
-this License.
-
- 7. If, as a consequence of a court judgment or allegation of patent
-infringement or for any other reason (not limited to patent issues),
-conditions are imposed on you (whether by court order, agreement or
-otherwise) that contradict the conditions of this License, they do not
-excuse you from the conditions of this License. If you cannot
-distribute so as to satisfy simultaneously your obligations under this
-License and any other pertinent obligations, then as a consequence you
-may not distribute the Program at all. For example, if a patent
-license would not permit royalty-free redistribution of the Program by
-all those who receive copies directly or indirectly through you, then
-the only way you could satisfy both it and this License would be to
-refrain entirely from distribution of the Program.
-
-If any portion of this section is held invalid or unenforceable under
-any particular circumstance, the balance of the section is intended to
-apply and the section as a whole is intended to apply in other
-circumstances.
-
-It is not the purpose of this section to induce you to infringe any
-patents or other property right claims or to contest validity of any
-such claims; this section has the sole purpose of protecting the
-integrity of the free software distribution system, which is
-implemented by public license practices. Many people have made
-generous contributions to the wide range of software distributed
-through that system in reliance on consistent application of that
-system; it is up to the author/donor to decide if he or she is willing
-to distribute software through any other system and a licensee cannot
-impose that choice.
-
-This section is intended to make thoroughly clear what is believed to
-be a consequence of the rest of this License.
-
- 8. If the distribution and/or use of the Program is restricted in
-certain countries either by patents or by copyrighted interfaces, the
-original copyright holder who places the Program under this License
-may add an explicit geographical distribution limitation excluding
-those countries, so that distribution is permitted only in or among
-countries not thus excluded. In such case, this License incorporates
-the limitation as if written in the body of this License.
-
- 9. The Free Software Foundation may publish revised and/or new versions
-of the General Public License from time to time. Such new versions will
-be similar in spirit to the present version, but may differ in detail to
-address new problems or concerns.
-
-Each version is given a distinguishing version number. If the Program
-specifies a version number of this License which applies to it and "any
-later version", you have the option of following the terms and conditions
-either of that version or of any later version published by the Free
-Software Foundation. If the Program does not specify a version number of
-this License, you may choose any version ever published by the Free Software
-Foundation.
-
- 10. If you wish to incorporate parts of the Program into other free
-programs whose distribution conditions are different, write to the author
-to ask for permission. For software which is copyrighted by the Free
-Software Foundation, write to the Free Software Foundation; we sometimes
-make exceptions for this. Our decision will be guided by the two goals
-of preserving the free status of all derivatives of our free software and
-of promoting the sharing and reuse of software generally.
-
- NO WARRANTY
-
- 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
-FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
-OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
-PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
-OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
-MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
-TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
-PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
-REPAIR OR CORRECTION.
-
- 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
-WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
-REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
-INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
-OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
-TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
-YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
-PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
-POSSIBILITY OF SUCH DAMAGES.
-
- END OF TERMS AND CONDITIONS
-
- How to Apply These Terms to Your New Programs
-
- If you develop a new program, and you want it to be of the greatest
-possible use to the public, the best way to achieve this is to make it
-free software which everyone can redistribute and change under these terms.
-
- To do so, attach the following notices to the program. It is safest
-to attach them to the start of each source file to most effectively
-convey the exclusion of warranty; and each file should have at least
-the "copyright" line and a pointer to where the full notice is found.
-
- <one line to give the program's name and a brief idea of what it does.>
- Copyright (C) <year> <name of author>
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-
-
-Also add information on how to contact you by electronic and paper mail.
-
-If the program is interactive, make it output a short notice like this
-when it starts in an interactive mode:
-
- Gnomovision version 69, Copyright (C) year name of author
- Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
- This is free software, and you are welcome to redistribute it
- under certain conditions; type `show c' for details.
-
-The hypothetical commands `show w' and `show c' should show the appropriate
-parts of the General Public License. Of course, the commands you use may
-be called something other than `show w' and `show c'; they could even be
-mouse-clicks or menu items--whatever suits your program.
-
-You should also get your employer (if you work as a programmer) or your
-school, if any, to sign a "copyright disclaimer" for the program, if
-necessary. Here is a sample; alter the names:
-
- Yoyodyne, Inc., hereby disclaims all copyright interest in the program
- `Gnomovision' (which makes passes at compilers) written by James Hacker.
-
- <signature of Ty Coon>, 1 April 1989
- Ty Coon, President of Vice
-
-This General Public License does not permit incorporating your program into
-proprietary programs. If your program is a subroutine library, you may
-consider it more useful to permit linking proprietary applications with the
-library. If this is what you want to do, use the GNU Library General
-Public License instead of this License.
diff --git a/recipes-kernel/mostcore/files/Makefile b/recipes-kernel/mostcore/files/Makefile
deleted file mode 100644
index d88272a54..000000000
--- a/recipes-kernel/mostcore/files/Makefile
+++ /dev/null
@@ -1,17 +0,0 @@
-# Makefile
-#
-
-SRC := $(shell pwd)
-
-obj-m := mostcore.o
-mostcore-y := core.o
-
-all:
- $(MAKE) -C $(KERNEL_SRC) M=$(SRC) modules
-
-modules_install:
- $(MAKE) -C $(KERNEL_SRC) M=$(SRC) modules_install
-
-clean:
- $(MAKE) -C $(KERNEL_SRC) M=$(SRC) clean
-
diff --git a/recipes-kernel/mostcore/files/core.c b/recipes-kernel/mostcore/files/core.c
deleted file mode 100644
index ff0e0dcd1..000000000
--- a/recipes-kernel/mostcore/files/core.c
+++ /dev/null
@@ -1,1928 +0,0 @@
-/*
- * core.c - Implementation of core module of MOST Linux driver stack
- *
- * Copyright (C) 2013-2015 Microchip Technology Germany II GmbH & Co. KG
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * This file is licensed under GPLv2.
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-#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 "mostcore.h"
-
-#define MAX_CHANNELS 64
-#define STRING_SIZE 80
-
-static struct class *most_class;
-static struct device *class_glue_dir;
-static struct ida mdev_id;
-static int dummy_num_buffers;
-
-struct most_c_aim_obj {
- struct most_aim *ptr;
- int refs;
- int num_buffers;
-};
-
-struct most_c_obj {
- struct kobject kobj;
- struct completion cleanup;
- atomic_t mbo_ref;
- atomic_t mbo_nq_level;
- u16 channel_id;
- bool is_poisoned;
- struct mutex start_mutex;
- int is_starving;
- struct most_interface *iface;
- struct most_inst_obj *inst;
- struct most_channel_config cfg;
- bool keep_mbo;
- bool enqueue_halt;
- struct list_head fifo;
- spinlock_t fifo_lock;
- struct list_head halt_fifo;
- struct list_head list;
- struct most_c_aim_obj aim0;
- struct most_c_aim_obj aim1;
- struct list_head trash_fifo;
- struct task_struct *hdm_enqueue_task;
- wait_queue_head_t hdm_fifo_wq;
-};
-
-#define to_c_obj(d) container_of(d, struct most_c_obj, kobj)
-
-struct most_inst_obj {
- int dev_id;
- struct most_interface *iface;
- struct list_head channel_list;
- struct most_c_obj *channel[MAX_CHANNELS];
- struct kobject kobj;
- struct list_head list;
-};
-
-#define to_inst_obj(d) container_of(d, struct most_inst_obj, kobj)
-
-/**
- * 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; \
-})
-
-/* ___ ___
- * ___C H A N N E L___
- */
-
-/**
- * struct most_c_attr - to access the attributes of a channel object
- * @attr: attributes of a channel
- * @show: pointer to the show function
- * @store: pointer to the store function
- */
-struct most_c_attr {
- struct attribute attr;
- ssize_t (*show)(struct most_c_obj *d,
- struct most_c_attr *attr,
- char *buf);
- ssize_t (*store)(struct most_c_obj *d,
- struct most_c_attr *attr,
- const char *buf,
- size_t count);
-};
-
-#define to_channel_attr(a) container_of(a, struct most_c_attr, attr)
-
-#define MOST_CHNL_ATTR(_name, _mode, _show, _store) \
- struct most_c_attr most_chnl_attr_##_name = \
- __ATTR(_name, _mode, _show, _store)
-
-/**
- * channel_attr_show - show function of channel object
- * @kobj: pointer to its kobject
- * @attr: pointer to its attributes
- * @buf: buffer
- */
-static ssize_t channel_attr_show(struct kobject *kobj, struct attribute *attr,
- char *buf)
-{
- struct most_c_attr *channel_attr = to_channel_attr(attr);
- struct most_c_obj *c_obj = to_c_obj(kobj);
-
- if (!channel_attr->show)
- return -EIO;
-
- return channel_attr->show(c_obj, channel_attr, buf);
-}
-
-/**
- * channel_attr_store - store function of channel object
- * @kobj: pointer to its kobject
- * @attr: pointer to its attributes
- * @buf: buffer
- * @len: length of buffer
- */
-static ssize_t channel_attr_store(struct kobject *kobj,
- struct attribute *attr,
- const char *buf,
- size_t len)
-{
- struct most_c_attr *channel_attr = to_channel_attr(attr);
- struct most_c_obj *c_obj = to_c_obj(kobj);
-
- if (!channel_attr->store)
- return -EIO;
- return channel_attr->store(c_obj, channel_attr, buf, len);
-}
-
-static const struct sysfs_ops most_channel_sysfs_ops = {
- .show = channel_attr_show,
- .store = channel_attr_store,
-};
-
-/**
- * most_free_mbo_coherent - free an MBO and its coherent buffer
- * @mbo: buffer to be released
- *
- */
-static void most_free_mbo_coherent(struct mbo *mbo)
-{
- struct most_c_obj *c = mbo->context;
- u16 const coherent_buf_size = c->cfg.buffer_size + c->cfg.extra_len;
-
- dma_free_coherent(NULL, coherent_buf_size, mbo->virt_address,
- mbo->bus_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_c_obj *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))))
- pr_info("WARN: fifo | trash fifo not empty\n");
-}
-
-/**
- * flush_trash_fifo - clear the trash fifo
- * @c: pointer to channel object
- */
-static int flush_trash_fifo(struct most_c_obj *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;
-}
-
-/**
- * most_channel_release - release function of channel object
- * @kobj: pointer to channel's kobject
- */
-static void most_channel_release(struct kobject *kobj)
-{
- struct most_c_obj *c = to_c_obj(kobj);
-
- kfree(c);
-}
-
-static ssize_t show_available_directions(struct most_c_obj *c,
- struct most_c_attr *attr,
- char *buf)
-{
- unsigned int i = c->channel_id;
-
- strcpy(buf, "");
- if (c->iface->channel_vector[i].direction & MOST_CH_RX)
- strcat(buf, "dir_rx ");
- if (c->iface->channel_vector[i].direction & MOST_CH_TX)
- strcat(buf, "dir_tx ");
- strcat(buf, "\n");
- return strlen(buf) + 1;
-}
-
-static ssize_t show_available_datatypes(struct most_c_obj *c,
- struct most_c_attr *attr,
- char *buf)
-{
- 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_AVP)
- strcat(buf, "isoc_avp ");
- strcat(buf, "\n");
- return strlen(buf) + 1;
-}
-
-static
-ssize_t show_number_of_packet_buffers(struct most_c_obj *c,
- struct most_c_attr *attr,
- char *buf)
-{
- unsigned int i = c->channel_id;
-
- return snprintf(buf, PAGE_SIZE, "%d\n",
- c->iface->channel_vector[i].num_buffers_packet);
-}
-
-static
-ssize_t show_number_of_stream_buffers(struct most_c_obj *c,
- struct most_c_attr *attr,
- char *buf)
-{
- unsigned int i = c->channel_id;
-
- return snprintf(buf, PAGE_SIZE, "%d\n",
- c->iface->channel_vector[i].num_buffers_streaming);
-}
-
-static
-ssize_t show_size_of_packet_buffer(struct most_c_obj *c,
- struct most_c_attr *attr,
- char *buf)
-{
- unsigned int i = c->channel_id;
-
- return snprintf(buf, PAGE_SIZE, "%d\n",
- c->iface->channel_vector[i].buffer_size_packet);
-}
-
-static
-ssize_t show_size_of_stream_buffer(struct most_c_obj *c,
- struct most_c_attr *attr,
- char *buf)
-{
- unsigned int i = c->channel_id;
-
- return snprintf(buf, PAGE_SIZE, "%d\n",
- c->iface->channel_vector[i].buffer_size_streaming);
-}
-
-static ssize_t show_channel_starving(struct most_c_obj *c,
- struct most_c_attr *attr,
- char *buf)
-{
- return snprintf(buf, PAGE_SIZE, "%d\n", c->is_starving);
-}
-
-#define create_show_channel_attribute(val) \
- static MOST_CHNL_ATTR(val, S_IRUGO, show_##val, NULL)
-
-create_show_channel_attribute(available_directions);
-create_show_channel_attribute(available_datatypes);
-create_show_channel_attribute(number_of_packet_buffers);
-create_show_channel_attribute(number_of_stream_buffers);
-create_show_channel_attribute(size_of_stream_buffer);
-create_show_channel_attribute(size_of_packet_buffer);
-create_show_channel_attribute(channel_starving);
-
-static ssize_t show_set_number_of_buffers(struct most_c_obj *c,
- struct most_c_attr *attr,
- char *buf)
-{
- return snprintf(buf, PAGE_SIZE, "%d\n", c->cfg.num_buffers);
-}
-
-static ssize_t store_set_number_of_buffers(struct most_c_obj *c,
- struct most_c_attr *attr,
- const char *buf,
- size_t count)
-{
- int ret = kstrtou16(buf, 0, &c->cfg.num_buffers);
-
- if (ret)
- return ret;
- return count;
-}
-
-static ssize_t show_set_buffer_size(struct most_c_obj *c,
- struct most_c_attr *attr,
- char *buf)
-{
- return snprintf(buf, PAGE_SIZE, "%d\n", c->cfg.buffer_size);
-}
-
-static ssize_t store_set_buffer_size(struct most_c_obj *c,
- struct most_c_attr *attr,
- const char *buf,
- size_t count)
-{
- int ret = kstrtou16(buf, 0, &c->cfg.buffer_size);
-
- if (ret)
- return ret;
- return count;
-}
-
-static ssize_t show_set_direction(struct most_c_obj *c,
- struct most_c_attr *attr,
- char *buf)
-{
- if (c->cfg.direction & MOST_CH_TX)
- return snprintf(buf, PAGE_SIZE, "dir_tx\n");
- else if (c->cfg.direction & MOST_CH_RX)
- return snprintf(buf, PAGE_SIZE, "dir_rx\n");
- return snprintf(buf, PAGE_SIZE, "unconfigured\n");
-}
-
-static ssize_t store_set_direction(struct most_c_obj *c,
- struct most_c_attr *attr,
- const char *buf,
- size_t count)
-{
- if (!strcmp(buf, "dir_rx\n")) {
- c->cfg.direction = MOST_CH_RX;
- } else if (!strcmp(buf, "dir_tx\n")) {
- c->cfg.direction = MOST_CH_TX;
- } else {
- pr_info("WARN: invalid attribute settings\n");
- return -EINVAL;
- }
- return count;
-}
-
-static ssize_t show_set_datatype(struct most_c_obj *c,
- struct most_c_attr *attr,
- char *buf)
-{
- if (c->cfg.data_type & MOST_CH_CONTROL)
- return snprintf(buf, PAGE_SIZE, "control\n");
- else if (c->cfg.data_type & MOST_CH_ASYNC)
- return snprintf(buf, PAGE_SIZE, "async\n");
- else if (c->cfg.data_type & MOST_CH_SYNC)
- return snprintf(buf, PAGE_SIZE, "sync\n");
- else if (c->cfg.data_type & MOST_CH_ISOC_AVP)
- return snprintf(buf, PAGE_SIZE, "isoc_avp\n");
- return snprintf(buf, PAGE_SIZE, "unconfigured\n");
-}
-
-static ssize_t store_set_datatype(struct most_c_obj *c,
- struct most_c_attr *attr,
- const char *buf,
- size_t count)
-{
- if (!strcmp(buf, "control\n")) {
- c->cfg.data_type = MOST_CH_CONTROL;
- } else if (!strcmp(buf, "async\n")) {
- c->cfg.data_type = MOST_CH_ASYNC;
- } else if (!strcmp(buf, "sync\n")) {
- c->cfg.data_type = MOST_CH_SYNC;
- } else if (!strcmp(buf, "isoc_avp\n")) {
- c->cfg.data_type = MOST_CH_ISOC_AVP;
- } else {
- pr_info("WARN: invalid attribute settings\n");
- return -EINVAL;
- }
- return count;
-}
-
-static ssize_t show_set_subbuffer_size(struct most_c_obj *c,
- struct most_c_attr *attr,
- char *buf)
-{
- return snprintf(buf, PAGE_SIZE, "%d\n", c->cfg.subbuffer_size);
-}
-
-static ssize_t store_set_subbuffer_size(struct most_c_obj *c,
- struct most_c_attr *attr,
- const char *buf,
- size_t count)
-{
- int ret = kstrtou16(buf, 0, &c->cfg.subbuffer_size);
-
- if (ret)
- return ret;
- return count;
-}
-
-static ssize_t show_set_packets_per_xact(struct most_c_obj *c,
- struct most_c_attr *attr,
- char *buf)
-{
- return snprintf(buf, PAGE_SIZE, "%d\n", c->cfg.packets_per_xact);
-}
-
-static ssize_t store_set_packets_per_xact(struct most_c_obj *c,
- struct most_c_attr *attr,
- const char *buf,
- size_t count)
-{
- int ret = kstrtou16(buf, 0, &c->cfg.packets_per_xact);
-
- if (ret)
- return ret;
- return count;
-}
-
-#define create_channel_attribute(value) \
- static MOST_CHNL_ATTR(value, S_IRUGO | S_IWUSR, \
- show_##value, \
- store_##value)
-
-create_channel_attribute(set_buffer_size);
-create_channel_attribute(set_number_of_buffers);
-create_channel_attribute(set_direction);
-create_channel_attribute(set_datatype);
-create_channel_attribute(set_subbuffer_size);
-create_channel_attribute(set_packets_per_xact);
-
-/**
- * most_channel_def_attrs - array of default attributes of channel object
- */
-static struct attribute *most_channel_def_attrs[] = {
- &most_chnl_attr_available_directions.attr,
- &most_chnl_attr_available_datatypes.attr,
- &most_chnl_attr_number_of_packet_buffers.attr,
- &most_chnl_attr_number_of_stream_buffers.attr,
- &most_chnl_attr_size_of_packet_buffer.attr,
- &most_chnl_attr_size_of_stream_buffer.attr,
- &most_chnl_attr_set_number_of_buffers.attr,
- &most_chnl_attr_set_buffer_size.attr,
- &most_chnl_attr_set_direction.attr,
- &most_chnl_attr_set_datatype.attr,
- &most_chnl_attr_set_subbuffer_size.attr,
- &most_chnl_attr_set_packets_per_xact.attr,
- &most_chnl_attr_channel_starving.attr,
- NULL,
-};
-
-static struct kobj_type most_channel_ktype = {
- .sysfs_ops = &most_channel_sysfs_ops,
- .release = most_channel_release,
- .default_attrs = most_channel_def_attrs,
-};
-
-static struct kset *most_channel_kset;
-
-/**
- * create_most_c_obj - allocates a channel object
- * @name: name of the channel object
- * @parent: parent kobject
- *
- * This create a channel object and registers it with sysfs.
- * Returns a pointer to the object or NULL when something went wrong.
- */
-static struct most_c_obj *
-create_most_c_obj(const char *name, struct kobject *parent)
-{
- struct most_c_obj *c;
- int retval;
-
- c = kzalloc(sizeof(*c), GFP_KERNEL);
- if (!c)
- return NULL;
- c->kobj.kset = most_channel_kset;
- retval = kobject_init_and_add(&c->kobj, &most_channel_ktype, parent,
- "%s", name);
- if (retval) {
- kobject_put(&c->kobj);
- return NULL;
- }
- kobject_uevent(&c->kobj, KOBJ_ADD);
- return c;
-}
-
-/* ___ ___
- * ___I N S T A N C E___
- */
-#define MOST_INST_ATTR(_name, _mode, _show, _store) \
- struct most_inst_attribute most_inst_attr_##_name = \
- __ATTR(_name, _mode, _show, _store)
-
-static struct list_head instance_list;
-
-/**
- * struct most_inst_attribute - to access the attributes of instance object
- * @attr: attributes of an instance
- * @show: pointer to the show function
- * @store: pointer to the store function
- */
-struct most_inst_attribute {
- struct attribute attr;
- ssize_t (*show)(struct most_inst_obj *d,
- struct most_inst_attribute *attr,
- char *buf);
- ssize_t (*store)(struct most_inst_obj *d,
- struct most_inst_attribute *attr,
- const char *buf,
- size_t count);
-};
-
-#define to_instance_attr(a) \
- container_of(a, struct most_inst_attribute, attr)
-
-/**
- * instance_attr_show - show function for an instance object
- * @kobj: pointer to kobject
- * @attr: pointer to attribute struct
- * @buf: buffer
- */
-static ssize_t instance_attr_show(struct kobject *kobj,
- struct attribute *attr,
- char *buf)
-{
- struct most_inst_attribute *instance_attr;
- struct most_inst_obj *instance_obj;
-
- instance_attr = to_instance_attr(attr);
- instance_obj = to_inst_obj(kobj);
-
- if (!instance_attr->show)
- return -EIO;
-
- return instance_attr->show(instance_obj, instance_attr, buf);
-}
-
-/**
- * instance_attr_store - store function for an instance object
- * @kobj: pointer to kobject
- * @attr: pointer to attribute struct
- * @buf: buffer
- * @len: length of buffer
- */
-static ssize_t instance_attr_store(struct kobject *kobj,
- struct attribute *attr,
- const char *buf,
- size_t len)
-{
- struct most_inst_attribute *instance_attr;
- struct most_inst_obj *instance_obj;
-
- instance_attr = to_instance_attr(attr);
- instance_obj = to_inst_obj(kobj);
-
- if (!instance_attr->store)
- return -EIO;
-
- return instance_attr->store(instance_obj, instance_attr, buf, len);
-}
-
-static const struct sysfs_ops most_inst_sysfs_ops = {
- .show = instance_attr_show,
- .store = instance_attr_store,
-};
-
-/**
- * most_inst_release - release function for instance object
- * @kobj: pointer to instance's kobject
- *
- * This frees the allocated memory for the instance object
- */
-static void most_inst_release(struct kobject *kobj)
-{
- struct most_inst_obj *inst = to_inst_obj(kobj);
-
- kfree(inst);
-}
-
-static ssize_t show_description(struct most_inst_obj *instance_obj,
- struct most_inst_attribute *attr,
- char *buf)
-{
- return snprintf(buf, PAGE_SIZE, "%s\n",
- instance_obj->iface->description);
-}
-
-static ssize_t show_interface(struct most_inst_obj *instance_obj,
- struct most_inst_attribute *attr,
- char *buf)
-{
- switch (instance_obj->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");
-}
-
-#define create_inst_attribute(value) \
- static MOST_INST_ATTR(value, S_IRUGO, show_##value, NULL)
-
-create_inst_attribute(description);
-create_inst_attribute(interface);
-
-static struct attribute *most_inst_def_attrs[] = {
- &most_inst_attr_description.attr,
- &most_inst_attr_interface.attr,
- NULL,
-};
-
-static struct kobj_type most_inst_ktype = {
- .sysfs_ops = &most_inst_sysfs_ops,
- .release = most_inst_release,
- .default_attrs = most_inst_def_attrs,
-};
-
-static struct kset *most_inst_kset;
-
-/**
- * create_most_inst_obj - creates an instance object
- * @name: name of the object to be created
- *
- * This allocates memory for an instance structure, assigns the proper kset
- * and registers it with sysfs.
- *
- * Returns a pointer to the instance object or NULL when something went wrong.
- */
-static struct most_inst_obj *create_most_inst_obj(const char *name)
-{
- struct most_inst_obj *inst;
- int retval;
-
- inst = kzalloc(sizeof(*inst), GFP_KERNEL);
- if (!inst)
- return NULL;
- inst->kobj.kset = most_inst_kset;
- retval = kobject_init_and_add(&inst->kobj, &most_inst_ktype, NULL,
- "%s", name);
- if (retval) {
- kobject_put(&inst->kobj);
- return NULL;
- }
- kobject_uevent(&inst->kobj, KOBJ_ADD);
- return inst;
-}
-
-/**
- * destroy_most_inst_obj - MOST instance release function
- * @inst: pointer to the instance object
- *
- * This decrements the reference counter of the instance object.
- * If the reference count turns zero, its release function is called
- */
-static void destroy_most_inst_obj(struct most_inst_obj *inst)
-{
- struct most_c_obj *c, *tmp;
-
- list_for_each_entry_safe(c, tmp, &inst->channel_list, list) {
- flush_trash_fifo(c);
- flush_channel_fifos(c);
- kobject_put(&c->kobj);
- }
- kobject_put(&inst->kobj);
-}
-
-/* ___ ___
- * ___A I M___
- */
-struct most_aim_obj {
- struct kobject kobj;
- struct list_head list;
- struct most_aim *driver;
- char add_link[STRING_SIZE];
- char remove_link[STRING_SIZE];
-};
-
-#define to_aim_obj(d) container_of(d, struct most_aim_obj, kobj)
-
-static struct list_head aim_list;
-
-/**
- * struct most_aim_attribute - to access the attributes of AIM object
- * @attr: attributes of an AIM
- * @show: pointer to the show function
- * @store: pointer to the store function
- */
-struct most_aim_attribute {
- struct attribute attr;
- ssize_t (*show)(struct most_aim_obj *d,
- struct most_aim_attribute *attr,
- char *buf);
- ssize_t (*store)(struct most_aim_obj *d,
- struct most_aim_attribute *attr,
- const char *buf,
- size_t count);
-};
-
-#define to_aim_attr(a) container_of(a, struct most_aim_attribute, attr)
-
-/**
- * aim_attr_show - show function of an AIM object
- * @kobj: pointer to kobject
- * @attr: pointer to attribute struct
- * @buf: buffer
- */
-static ssize_t aim_attr_show(struct kobject *kobj,
- struct attribute *attr,
- char *buf)
-{
- struct most_aim_attribute *aim_attr;
- struct most_aim_obj *aim_obj;
-
- aim_attr = to_aim_attr(attr);
- aim_obj = to_aim_obj(kobj);
-
- if (!aim_attr->show)
- return -EIO;
-
- return aim_attr->show(aim_obj, aim_attr, buf);
-}
-
-/**
- * aim_attr_store - store function of an AIM object
- * @kobj: pointer to kobject
- * @attr: pointer to attribute struct
- * @buf: buffer
- * @len: length of buffer
- */
-static ssize_t aim_attr_store(struct kobject *kobj,
- struct attribute *attr,
- const char *buf,
- size_t len)
-{
- struct most_aim_attribute *aim_attr;
- struct most_aim_obj *aim_obj;
-
- aim_attr = to_aim_attr(attr);
- aim_obj = to_aim_obj(kobj);
-
- if (!aim_attr->store)
- return -EIO;
- return aim_attr->store(aim_obj, aim_attr, buf, len);
-}
-
-static const struct sysfs_ops most_aim_sysfs_ops = {
- .show = aim_attr_show,
- .store = aim_attr_store,
-};
-
-/**
- * most_aim_release - AIM release function
- * @kobj: pointer to AIM's kobject
- */
-static void most_aim_release(struct kobject *kobj)
-{
- struct most_aim_obj *aim_obj = to_aim_obj(kobj);
-
- kfree(aim_obj);
-}
-
-static ssize_t show_add_link(struct most_aim_obj *aim_obj,
- struct most_aim_attribute *attr,
- char *buf)
-{
- return snprintf(buf, PAGE_SIZE, "%s\n", aim_obj->add_link);
-}
-
-/**
- * split_string - parses and changes string in the buffer buf and
- * splits it into two mandatory and one optional substrings.
- *
- * @buf: complete string from attribute 'add_channel'
- * @a: address of pointer to 1st substring (=instance name)
- * @b: address of pointer to 2nd substring (=channel name)
- * @c: optional address of pointer to 3rd substring (=user defined name)
- *
- * Examples:
- *
- * Input: "mdev0:ch0@ep_81:my_channel\n" or
- * "mdev0:ch0@ep_81:my_channel"
- *
- * Output: *a -> "mdev0", *b -> "ch0@ep_81", *c -> "my_channel"
- *
- * Input: "mdev0:ch0@ep_81\n"
- * Output: *a -> "mdev0", *b -> "ch0@ep_81", *c -> ""
- *
- * Input: "mdev0:ch0@ep_81"
- * Output: *a -> "mdev0", *b -> "ch0@ep_81", *c == NULL
- */
-static int split_string(char *buf, char **a, char **b, char **c)
-{
- *a = strsep(&buf, ":");
- if (!*a)
- return -EIO;
-
- *b = strsep(&buf, ":\n");
- if (!*b)
- return -EIO;
-
- if (c)
- *c = strsep(&buf, ":\n");
-
- return 0;
-}
-
-/**
- * get_channel_by_name - get pointer to channel object
- * @mdev: name of the device instance
- * @mdev_ch: name of the respective channel
- *
- * This retrieves the pointer to a channel object.
- */
-static struct
-most_c_obj *get_channel_by_name(char *mdev, char *mdev_ch)
-{
- struct most_c_obj *c, *tmp;
- struct most_inst_obj *i, *i_tmp;
- int found = 0;
-
- list_for_each_entry_safe(i, i_tmp, &instance_list, list) {
- if (!strcmp(kobject_name(&i->kobj), mdev)) {
- found++;
- break;
- }
- }
- if (unlikely(!found))
- return ERR_PTR(-EIO);
-
- list_for_each_entry_safe(c, tmp, &i->channel_list, list) {
- if (!strcmp(kobject_name(&c->kobj), mdev_ch)) {
- found++;
- break;
- }
- }
- if (unlikely(found < 2))
- return ERR_PTR(-EIO);
- return c;
-}
-
-/**
- * store_add_link - store() function for add_link attribute
- * @aim_obj: pointer to AIM object
- * @attr: its attributes
- * @buf: buffer
- * @len: buffer length
- *
- * This parses the string given by buf and splits it into
- * three substrings. Note: third substring is optional. In case a cdev
- * AIM is loaded the optional 3rd substring will make up the name of
- * device node in the /dev directory. If omitted, the device node will
- * inherit the channel's name within sysfs.
- *
- * Searches for a pair of device and channel and probes the AIM
- *
- * Example:
- * (1) echo -n -e "mdev0:ch0@ep_81:my_rxchannel\n" >add_link
- * (2) echo -n -e "mdev0:ch0@ep_81\n" >add_link
- *
- * (1) would create the device node /dev/my_rxchannel
- * (2) would create the device node /dev/mdev0-ch0@ep_81
- */
-static ssize_t store_add_link(struct most_aim_obj *aim_obj,
- struct most_aim_attribute *attr,
- const char *buf,
- size_t len)
-{
- struct most_c_obj *c;
- struct most_aim **aim_ptr;
- char buffer[STRING_SIZE];
- char *mdev;
- char *mdev_ch;
- char *mdev_devnod;
- char devnod_buf[STRING_SIZE];
- int ret;
- size_t max_len = min_t(size_t, len + 1, STRING_SIZE);
-
- strlcpy(buffer, buf, max_len);
- strlcpy(aim_obj->add_link, buf, max_len);
-
- ret = split_string(buffer, &mdev, &mdev_ch, &mdev_devnod);
- if (ret)
- return ret;
-
- if (!mdev_devnod || *mdev_devnod == 0) {
- snprintf(devnod_buf, sizeof(devnod_buf), "%s-%s", mdev,
- mdev_ch);
- mdev_devnod = devnod_buf;
- }
-
- c = get_channel_by_name(mdev, mdev_ch);
- if (IS_ERR(c))
- return -ENODEV;
-
- if (!c->aim0.ptr)
- aim_ptr = &c->aim0.ptr;
- else if (!c->aim1.ptr)
- aim_ptr = &c->aim1.ptr;
- else
- return -ENOSPC;
-
- *aim_ptr = aim_obj->driver;
- ret = aim_obj->driver->probe_channel(c->iface, c->channel_id,
- &c->cfg, &c->kobj, mdev_devnod);
- if (ret) {
- *aim_ptr = NULL;
- return ret;
- }
-
- return len;
-}
-
-static struct most_aim_attribute most_aim_attr_add_link =
- __ATTR(add_link, S_IRUGO | S_IWUSR, show_add_link, store_add_link);
-
-static ssize_t show_remove_link(struct most_aim_obj *aim_obj,
- struct most_aim_attribute *attr,
- char *buf)
-{
- return snprintf(buf, PAGE_SIZE, "%s\n", aim_obj->remove_link);
-}
-
-/**
- * store_remove_link - store function for remove_link attribute
- * @aim_obj: pointer to AIM object
- * @attr: its attributes
- * @buf: buffer
- * @len: buffer length
- *
- * Example:
- * echo -n -e "mdev0:ch0@ep_81\n" >remove_link
- */
-static ssize_t store_remove_link(struct most_aim_obj *aim_obj,
- struct most_aim_attribute *attr,
- const char *buf,
- size_t len)
-{
- struct most_c_obj *c;
- char buffer[STRING_SIZE];
- char *mdev;
- char *mdev_ch;
- int ret;
- size_t max_len = min_t(size_t, len + 1, STRING_SIZE);
-
- strlcpy(buffer, buf, max_len);
- strlcpy(aim_obj->remove_link, buf, max_len);
- ret = split_string(buffer, &mdev, &mdev_ch, NULL);
- if (ret)
- return ret;
-
- c = get_channel_by_name(mdev, mdev_ch);
- if (IS_ERR(c))
- return -ENODEV;
-
- if (aim_obj->driver->disconnect_channel(c->iface, c->channel_id))
- return -EIO;
- if (c->aim0.ptr == aim_obj->driver)
- c->aim0.ptr = NULL;
- if (c->aim1.ptr == aim_obj->driver)
- c->aim1.ptr = NULL;
- return len;
-}
-
-static struct most_aim_attribute most_aim_attr_remove_link =
- __ATTR(remove_link, S_IRUGO | S_IWUSR, show_remove_link,
- store_remove_link);
-
-static struct attribute *most_aim_def_attrs[] = {
- &most_aim_attr_add_link.attr,
- &most_aim_attr_remove_link.attr,
- NULL,
-};
-
-static struct kobj_type most_aim_ktype = {
- .sysfs_ops = &most_aim_sysfs_ops,
- .release = most_aim_release,
- .default_attrs = most_aim_def_attrs,
-};
-
-static struct kset *most_aim_kset;
-
-/**
- * create_most_aim_obj - creates an AIM object
- * @name: name of the AIM
- *
- * This creates an AIM object assigns the proper kset and registers
- * it with sysfs.
- * Returns a pointer to the object or NULL if something went wrong.
- */
-static struct most_aim_obj *create_most_aim_obj(const char *name)
-{
- struct most_aim_obj *most_aim;
- int retval;
-
- most_aim = kzalloc(sizeof(*most_aim), GFP_KERNEL);
- if (!most_aim)
- return NULL;
- most_aim->kobj.kset = most_aim_kset;
- retval = kobject_init_and_add(&most_aim->kobj, &most_aim_ktype,
- NULL, "%s", name);
- if (retval) {
- kobject_put(&most_aim->kobj);
- return NULL;
- }
- kobject_uevent(&most_aim->kobj, KOBJ_ADD);
- return most_aim;
-}
-
-/**
- * destroy_most_aim_obj - AIM release function
- * @p: pointer to AIM object
- *
- * This decrements the reference counter of the AIM object. If the
- * reference count turns zero, its release function will be called.
- */
-static void destroy_most_aim_obj(struct most_aim_obj *p)
-{
- kobject_put(&p->kobj);
-}
-
-/* ___ ___
- * ___C O R E___
- */
-
-/**
- * Instantiation of the MOST bus
- */
-static struct bus_type most_bus = {
- .name = "most",
-};
-
-/**
- * Instantiation of the core driver
- */
-static struct device_driver mostcore = {
- .name = "mostcore",
- .bus = &most_bus,
-};
-
-static inline void trash_mbo(struct mbo *mbo)
-{
- unsigned long flags;
- struct most_c_obj *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 struct mbo *get_hdm_mbo(struct most_c_obj *c)
-{
- unsigned long flags;
- struct mbo *mbo;
-
- spin_lock_irqsave(&c->fifo_lock, flags);
- if (c->enqueue_halt || list_empty(&c->halt_fifo))
- mbo = NULL;
- else
- mbo = list_pop_mbo(&c->halt_fifo);
- spin_unlock_irqrestore(&c->fifo_lock, flags);
- return mbo;
-}
-
-static void nq_hdm_mbo(struct mbo *mbo)
-{
- unsigned long flags;
- struct most_c_obj *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_c_obj *c = data;
- struct mbo *mbo;
- typeof(c->iface->enqueue) enqueue = c->iface->enqueue;
-
- while (likely(!kthread_should_stop())) {
- wait_event_interruptible(c->hdm_fifo_wq,
- (mbo = get_hdm_mbo(c)) ||
- kthread_should_stop());
-
- if (unlikely(!mbo))
- continue;
-
- if (c->cfg.direction == MOST_CH_RX)
- mbo->buffer_length = c->cfg.buffer_size;
-
- if (unlikely(enqueue(mbo->ifp, mbo->hdm_channel_id, mbo))) {
- pr_err("hdm enqueue failed\n");
- nq_hdm_mbo(mbo);
- c->hdm_enqueue_task = NULL;
- return 0;
- }
- }
-
- return 0;
-}
-
-static int run_enqueue_thread(struct most_c_obj *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: buffer object
- *
- * 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 AIM.
- */
-static void arm_mbo(struct mbo *mbo)
-{
- unsigned long flags;
- struct most_c_obj *c;
-
- BUG_ON((!mbo) || (!mbo->context));
- 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->aim0.refs && c->aim0.ptr->tx_completion)
- c->aim0.ptr->tx_completion(c->iface, c->channel_id);
-
- if (c->aim1.refs && c->aim1.ptr->tx_completion)
- c->aim1.ptr->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_c_obj *c, int dir,
- void (*compl)(struct mbo *))
-{
- unsigned int i;
- int retval;
- struct mbo *mbo;
- 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) {
- pr_info("WARN: Allocation of MBO failed.\n");
- retval = i;
- goto _exit;
- }
- mbo->context = c;
- mbo->ifp = c->iface;
- mbo->hdm_channel_id = c->channel_id;
- mbo->virt_address = dma_alloc_coherent(NULL,
- coherent_buf_size,
- &mbo->bus_address,
- GFP_KERNEL);
- if (!mbo->virt_address) {
- pr_info("WARN: No DMA coherent buffer.\n");
- retval = i;
- goto _error1;
- }
- 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 {
- arm_mbo(mbo);
- }
- }
- return i;
-
-_error1:
- kfree(mbo);
-_exit:
- return retval;
-}
-
-/**
- * most_submit_mbo - submits an MBO to fifo
- * @mbo: pointer to the MBO
- *
- */
-int most_submit_mbo(struct mbo *mbo)
-{
- if (unlikely((!mbo) || (!mbo->context))) {
- pr_err("Bad MBO or missing channel reference\n");
- return -EINVAL;
- }
-
- nq_hdm_mbo(mbo);
- return 0;
-}
-EXPORT_SYMBOL_GPL(most_submit_mbo);
-
-/**
- * most_write_completion - write completion handler
- * @mbo: pointer to MBO
- *
- * 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_c_obj *c;
-
- BUG_ON((!mbo) || (!mbo->context));
-
- c = mbo->context;
- if (mbo->status == MBO_E_INVAL)
- pr_info("WARN: Tx MBO status: invalid\n");
- if (unlikely(c->is_poisoned || (mbo->status == MBO_E_CLOSE)))
- trash_mbo(mbo);
- else
- arm_mbo(mbo);
-}
-
-/**
- * get_channel_by_iface - get pointer to channel object
- * @iface: pointer to interface instance
- * @id: channel ID
- *
- * This retrieves a pointer to a channel of the given interface and channel ID.
- */
-static struct
-most_c_obj *get_channel_by_iface(struct most_interface *iface, int id)
-{
- struct most_inst_obj *i;
-
- if (unlikely(!iface)) {
- pr_err("Bad interface\n");
- return NULL;
- }
- if (unlikely((id < 0) || (id >= iface->num_channels))) {
- pr_err("Channel index (%d) out of range\n", id);
- return NULL;
- }
- i = iface->priv;
- if (unlikely(!i)) {
- pr_err("interface is not registered\n");
- return NULL;
- }
- return i->channel[id];
-}
-
-int channel_has_mbo(struct most_interface *iface, int id, struct most_aim *aim)
-{
- struct most_c_obj *c = get_channel_by_iface(iface, id);
- unsigned long flags;
- int empty;
-
- if (unlikely(!c))
- return -EINVAL;
-
- if (c->aim0.refs && c->aim1.refs &&
- ((aim == c->aim0.ptr && c->aim0.num_buffers <= 0) ||
- (aim == c->aim1.ptr && c->aim1.num_buffers <= 0)))
- return false;
-
- 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
- *
- * 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_aim *aim)
-{
- struct mbo *mbo;
- struct most_c_obj *c;
- unsigned long flags;
- int *num_buffers_ptr;
-
- c = get_channel_by_iface(iface, id);
- if (unlikely(!c))
- return NULL;
-
- if (c->aim0.refs && c->aim1.refs &&
- ((aim == c->aim0.ptr && c->aim0.num_buffers <= 0) ||
- (aim == c->aim1.ptr && c->aim1.num_buffers <= 0)))
- return NULL;
-
- if (aim == c->aim0.ptr)
- num_buffers_ptr = &c->aim0.num_buffers;
- else if (aim == c->aim1.ptr)
- num_buffers_ptr = &c->aim1.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: buffer object
- */
-void most_put_mbo(struct mbo *mbo)
-{
- struct most_c_obj *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: pointer to MBO
- *
- * 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 AIM for further processing.
- */
-static void most_read_completion(struct mbo *mbo)
-{
- struct most_c_obj *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)) {
- pr_info("WARN: rx device out of buffers\n");
- c->is_starving = 1;
- }
-
- if (c->aim0.refs && c->aim0.ptr->rx_completion &&
- c->aim0.ptr->rx_completion(mbo) == 0)
- return;
-
- if (c->aim1.refs && c->aim1.ptr->rx_completion &&
- c->aim1.ptr->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
- *
- * 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_aim *aim)
-{
- int num_buffer;
- int ret;
- struct most_c_obj *c = get_channel_by_iface(iface, id);
-
- if (unlikely(!c))
- return -EINVAL;
-
- mutex_lock(&c->start_mutex);
- if (c->aim0.refs + c->aim1.refs > 0)
- goto out; /* already started by other aim */
-
- if (!try_module_get(iface->mod)) {
- pr_info("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)) {
- pr_info("channel configuration failed. Go check settings...\n");
- ret = -EINVAL;
- goto error;
- }
-
- 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)) {
- pr_info("failed to allocate memory\n");
- ret = -ENOMEM;
- goto error;
- }
-
- ret = run_enqueue_thread(c, id);
- if (ret)
- goto error;
-
- c->is_starving = 0;
- c->aim0.num_buffers = c->cfg.num_buffers / 2;
- c->aim1.num_buffers = c->cfg.num_buffers - c->aim0.num_buffers;
- atomic_set(&c->mbo_ref, num_buffer);
-
-out:
- if (aim == c->aim0.ptr)
- c->aim0.refs++;
- if (aim == c->aim1.ptr)
- c->aim1.refs++;
- mutex_unlock(&c->start_mutex);
- return 0;
-
-error:
- 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
- */
-int most_stop_channel(struct most_interface *iface, int id,
- struct most_aim *aim)
-{
- struct most_c_obj *c;
-
- if (unlikely((!iface) || (id >= iface->num_channels) || (id < 0))) {
- pr_err("Bad interface or index out of range\n");
- return -EINVAL;
- }
- c = get_channel_by_iface(iface, id);
- if (unlikely(!c))
- return -EINVAL;
-
- mutex_lock(&c->start_mutex);
- if (c->aim0.refs + c->aim1.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)) {
- pr_err("Cannot stop channel %d of mdev %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)) {
- pr_info("Interrupted while clean up ch %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 (aim == c->aim0.ptr)
- c->aim0.refs--;
- if (aim == c->aim1.ptr)
- c->aim1.refs--;
- mutex_unlock(&c->start_mutex);
- return 0;
-}
-EXPORT_SYMBOL_GPL(most_stop_channel);
-
-/**
- * most_register_aim - registers an AIM (driver) with the core
- * @aim: instance of AIM to be registered
- */
-int most_register_aim(struct most_aim *aim)
-{
- struct most_aim_obj *aim_obj;
-
- if (!aim) {
- pr_err("Bad driver\n");
- return -EINVAL;
- }
- aim_obj = create_most_aim_obj(aim->name);
- if (!aim_obj) {
- pr_info("failed to alloc driver object\n");
- return -ENOMEM;
- }
- aim_obj->driver = aim;
- aim->context = aim_obj;
- pr_info("registered new application interfacing module %s\n",
- aim->name);
- list_add_tail(&aim_obj->list, &aim_list);
- return 0;
-}
-EXPORT_SYMBOL_GPL(most_register_aim);
-
-/**
- * most_deregister_aim - deregisters an AIM (driver) with the core
- * @aim: AIM to be removed
- */
-int most_deregister_aim(struct most_aim *aim)
-{
- struct most_aim_obj *aim_obj;
- struct most_c_obj *c, *tmp;
- struct most_inst_obj *i, *i_tmp;
-
- if (!aim) {
- pr_err("Bad driver\n");
- return -EINVAL;
- }
-
- aim_obj = aim->context;
- if (!aim_obj) {
- pr_info("driver not registered.\n");
- return -EINVAL;
- }
- list_for_each_entry_safe(i, i_tmp, &instance_list, list) {
- list_for_each_entry_safe(c, tmp, &i->channel_list, list) {
- if (c->aim0.ptr == aim || c->aim1.ptr == aim)
- aim->disconnect_channel(
- c->iface, c->channel_id);
- if (c->aim0.ptr == aim)
- c->aim0.ptr = NULL;
- if (c->aim1.ptr == aim)
- c->aim1.ptr = NULL;
- }
- }
- list_del(&aim_obj->list);
- destroy_most_aim_obj(aim_obj);
- pr_info("deregistering application interfacing module %s\n", aim->name);
- return 0;
-}
-EXPORT_SYMBOL_GPL(most_deregister_aim);
-
-/**
- * most_register_interface - registers an interface with core
- * @iface: pointer to the instance of the interface description.
- *
- * Allocates and initializes a new interface instance and all of its channels.
- * Returns a pointer to kobject or an error pointer.
- */
-struct kobject *most_register_interface(struct most_interface *iface)
-{
- unsigned int i;
- int id;
- char name[STRING_SIZE];
- char channel_name[STRING_SIZE];
- struct most_c_obj *c;
- struct most_inst_obj *inst;
-
- if (!iface || !iface->enqueue || !iface->configure ||
- !iface->poison_channel || (iface->num_channels > MAX_CHANNELS)) {
- pr_err("Bad interface or channel overflow\n");
- return ERR_PTR(-EINVAL);
- }
-
- id = ida_simple_get(&mdev_id, 0, 0, GFP_KERNEL);
- if (id < 0) {
- pr_info("Failed to alloc mdev ID\n");
- return ERR_PTR(id);
- }
- snprintf(name, STRING_SIZE, "mdev%d", id);
-
- inst = create_most_inst_obj(name);
- if (!inst) {
- pr_info("Failed to allocate interface instance\n");
- ida_simple_remove(&mdev_id, id);
- return ERR_PTR(-ENOMEM);
- }
-
- iface->priv = inst;
- INIT_LIST_HEAD(&inst->channel_list);
- inst->iface = iface;
- inst->dev_id = id;
- list_add_tail(&inst->list, &instance_list);
-
- for (i = 0; i < iface->num_channels; i++) {
- const char *name_suffix = iface->channel_vector[i].name_suffix;
-
- if (!name_suffix)
- snprintf(channel_name, STRING_SIZE, "ch%d", i);
- else if (name_suffix[0] == '@')
- snprintf(channel_name, STRING_SIZE, "ch%d%s", i,
- name_suffix);
- else
- snprintf(channel_name, STRING_SIZE, "%s", name_suffix);
-
- /* this increments the reference count of this instance */
- c = create_most_c_obj(channel_name, &inst->kobj);
- if (!c)
- goto free_instance;
- inst->channel[i] = c;
- c->is_starving = 0;
- c->iface = iface;
- c->inst = inst;
- 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);
- list_add_tail(&c->list, &inst->channel_list);
- }
- pr_info("registered new MOST device mdev%d (%s)\n",
- inst->dev_id, iface->description);
- return &inst->kobj;
-
-free_instance:
- pr_info("Failed allocate channel(s)\n");
- list_del(&inst->list);
- ida_simple_remove(&mdev_id, id);
- destroy_most_inst_obj(inst);
- return ERR_PTR(-ENOMEM);
-}
-EXPORT_SYMBOL_GPL(most_register_interface);
-
-/**
- * most_deregister_interface - deregisters an interface with core
- * @iface: pointer to the interface instance description.
- *
- * Before removing an interface instance from the list, all running
- * channels are stopped and poisoned.
- */
-void most_deregister_interface(struct most_interface *iface)
-{
- struct most_inst_obj *i = iface->priv;
- struct most_c_obj *c;
-
- if (unlikely(!i)) {
- pr_info("Bad Interface\n");
- return;
- }
- pr_info("deregistering MOST device %s (%s)\n", i->kobj.name,
- iface->description);
-
- list_for_each_entry(c, &i->channel_list, list) {
- if (c->aim0.ptr)
- c->aim0.ptr->disconnect_channel(c->iface,
- c->channel_id);
- if (c->aim1.ptr)
- c->aim1.ptr->disconnect_channel(c->iface,
- c->channel_id);
- c->aim0.ptr = NULL;
- c->aim1.ptr = NULL;
- }
-
- ida_simple_remove(&mdev_id, i->dev_id);
- list_del(&i->list);
- destroy_most_inst_obj(i);
-}
-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_c_obj *c = get_channel_by_iface(iface, id);
-
- if (likely(c))
- c->enqueue_halt = true;
-}
-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_c_obj *c = get_channel_by_iface(iface, id);
-
- if (unlikely(!c))
- return;
- c->enqueue_halt = false;
-
- wake_up_interruptible(&c->hdm_fifo_wq);
-}
-EXPORT_SYMBOL_GPL(most_resume_enqueue);
-
-static int __init most_init(void)
-{
- pr_info("init()\n");
- INIT_LIST_HEAD(&instance_list);
- INIT_LIST_HEAD(&aim_list);
- ida_init(&mdev_id);
-
- if (bus_register(&most_bus)) {
- pr_info("Cannot register most bus\n");
- goto exit;
- }
-
- most_class = class_create(THIS_MODULE, "most");
- if (IS_ERR(most_class)) {
- pr_info("No udev support.\n");
- goto exit_bus;
- }
- if (driver_register(&mostcore)) {
- pr_info("Cannot register core driver\n");
- goto exit_class;
- }
-
- class_glue_dir =
- device_create(most_class, NULL, 0, NULL, "mostcore");
- if (!class_glue_dir)
- goto exit_driver;
-
- most_aim_kset =
- kset_create_and_add("aims", NULL, &class_glue_dir->kobj);
- if (!most_aim_kset)
- goto exit_class_container;
-
- most_inst_kset =
- kset_create_and_add("devices", NULL, &class_glue_dir->kobj);
- if (!most_inst_kset)
- goto exit_driver_kset;
-
- return 0;
-
-exit_driver_kset:
- kset_unregister(most_aim_kset);
-exit_class_container:
- device_destroy(most_class, 0);
-exit_driver:
- driver_unregister(&mostcore);
-exit_class:
- class_destroy(most_class);
-exit_bus:
- bus_unregister(&most_bus);
-exit:
- return -ENOMEM;
-}
-
-static void __exit most_exit(void)
-{
- struct most_inst_obj *i, *i_tmp;
- struct most_aim_obj *d, *d_tmp;
-
- pr_info("exit core module\n");
- list_for_each_entry_safe(d, d_tmp, &aim_list, list) {
- destroy_most_aim_obj(d);
- }
-
- list_for_each_entry_safe(i, i_tmp, &instance_list, list) {
- list_del(&i->list);
- destroy_most_inst_obj(i);
- }
- kset_unregister(most_inst_kset);
- kset_unregister(most_aim_kset);
- device_destroy(most_class, 0);
- driver_unregister(&mostcore);
- class_destroy(most_class);
- bus_unregister(&most_bus);
- 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/recipes-kernel/mostcore/files/mostcore.h b/recipes-kernel/mostcore/files/mostcore.h
deleted file mode 100644
index 60e018e49..000000000
--- a/recipes-kernel/mostcore/files/mostcore.h
+++ /dev/null
@@ -1,320 +0,0 @@
-/*
- * mostcore.h - Interface between MostCore,
- * Hardware Dependent Module (HDM) and Application Interface Module (AIM).
- *
- * Copyright (C) 2013-2015, Microchip Technology Germany II GmbH & Co. KG
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * This file is licensed under GPLv2.
- */
-
-/*
- * Authors:
- * Andrey Shvetsov <andrey.shvetsov@k2l.de>
- * Christian Gromm <christian.gromm@microchip.com>
- * Sebastian Graf
- */
-
-#ifndef __MOST_CORE_H__
-#define __MOST_CORE_H__
-
-#include <linux/types.h>
-
-struct kobject;
-struct module;
-
-/**
- * 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_AVP = 1 << 2,
- MOST_CH_SYNC = 1 << 5,
-};
-
-enum mbo_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_buffer_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_buffer_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 MostCore 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/virtual/most/mostcore/devices/mdev-#/mdev#-ch#/ 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;
- 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 MostCore 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;
-};
-
-/*
- * 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
- * @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 MostCore allocates and initializes the MBO.
- *
- * The HDM receives MBO for transfer from MostCore 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.
- *
- * At the end the MostCore deallocates the MBO or recycles it for further
- * transfers for the same or 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 mbo_status_flags status;
- void (*complete)(struct mbo *);
-};
-
-/**
- * Interface instance description.
- *
- * Describes one instance of an interface like Medusa PCIe or Vantage USB.
- * This structure is allocated and initialized in the HDM. MostCore may not
- * modify this structure.
- *
- * @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"
- * @priv Private field used by mostcore to store context information.
- */
-struct most_interface {
- struct module *mod;
- enum most_interface_type interface;
- const char *description;
- int num_channels;
- struct most_channel_capability *channel_vector;
- 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 *priv;
-};
-
-/**
- * struct most_aim - identifies MOST device driver to mostcore
- * @name: Driver 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
- * @context: context pointer to be used by mostcore
- */
-struct most_aim {
- const char *name;
- int (*probe_channel)(struct most_interface *iface, int channel_idx,
- struct most_channel_config *cfg,
- struct kobject *parent, char *name);
- 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);
- void *context;
-};
-
-/**
- * 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.
- */
-struct kobject *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);
-int 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_aim(struct most_aim *aim);
-int most_deregister_aim(struct most_aim *aim);
-struct mbo *most_get_mbo(struct most_interface *iface, int channel_idx,
- struct most_aim *);
-void most_put_mbo(struct mbo *mbo);
-int channel_has_mbo(struct most_interface *iface, int channel_idx,
- struct most_aim *aim);
-int most_start_channel(struct most_interface *iface, int channel_idx,
- struct most_aim *);
-int most_stop_channel(struct most_interface *iface, int channel_idx,
- struct most_aim *);
-
-#endif /* MOST_CORE_H_ */