swap_driver-y := swap_driver_module.o \
device_driver.o \
driver_to_buffer.o \
- swap_debugfs.o
+ swap_debugfs.o \
+ us_interaction.o
E_SD_WRONG_ARGS = 12, /* Arguments, passed to the func, doesn't
pass sanity check */
E_SD_NO_MEMORY = 13, /* No memory to allocate */
- E_SD_UNINIT_ERROR = 14 /* swap_buffer uninitialization error */
+ E_SD_UNINIT_ERROR = 14, /* swap_buffer uninitialization error */
+ E_SD_NL_INIT_ERR = 15, /* Netlink init error */
+ E_SD_NL_MSG_ERR = 16, /* Netlink message send error */
+ E_SD_NO_DAEMON_PID = 17 /* No daemon pid in us_interaction */
};
#endif /* __SWAP_DRIVER_ERRORS_H__ */
#include "driver_defs.h"
#include "device_driver.h"
#include "swap_debugfs.h"
+#include "us_interaction.h"
static int __init swap_driver_init(void)
{
if (ret)
return ret;
- swap_device_init();
+ ret = swap_device_init();
+ if (ret)
+ goto dev_init_fail;
+
+ ret = us_interaction_create();
+ if (ret)
+ goto interact_create_fail;
+
print_msg("Driver module initialized\n");
return 0;
+
+dev_init_fail:
+ swap_debugfs_exit();
+interact_create_fail:
+ swap_device_exit();
+
+ return ret;
}
static void __exit swap_driver_exit(void)
{
+ us_interaction_destroy();
swap_device_exit();
swap_debugfs_exit();
print_msg("Driver module uninitialized\n");
--- /dev/null
+/*
+ * SWAP device driver
+ * modules/driver/us_interaction.c
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Copyright (C) Samsung Electronics, 2014
+ *
+ * 2014 Alexander Aksenov <a.aksenov@samsung.com>: Driver user<-> kernel
+ * connect implement
+ *
+ */
+
+
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/types.h>
+#include <linux/connector.h>
+#include <linux/slab.h>
+
+#include "us_interaction.h"
+#include "us_interaction_msg.h"
+#include "swap_driver_errors.h"
+#include "kernel_operations.h"
+
+
+/* Connector id struct */
+static struct cb_id cn_swap_id = {CN_SWAP_IDX, CN_SWAP_VAL};
+
+/* Swap connector name */
+static const char cn_swap_name[] = "cn_swap";
+
+/* Send messages counter */
+static u32 msg_counter = 0;
+
+
+int us_interaction_send_msg(const void *data, size_t size)
+{
+ struct cn_msg *msg;
+ int ret;
+
+ msg = kzalloc(sizeof(*msg) + size, GFP_ATOMIC);
+ if (msg == NULL)
+ return -E_SD_NO_MEMORY;
+
+ memcpy(&msg->id, &cn_swap_id, sizeof(msg->id));
+ msg->seq = msg_counter;
+ msg->len = size;
+ memcpy(msg->data, data, msg->len);
+
+ ret = cn_netlink_send(msg, CN_DAEMON_GROUP, GFP_ATOMIC);
+ if (ret < 0)
+ goto fail_send;
+ kfree(msg);
+
+ msg_counter++;
+
+ return E_SD_SUCCESS;
+
+fail_send:
+ kfree(msg);
+
+ return ret;
+}
+
+static void us_interaction_recv_msg(struct cn_msg *msg,
+ struct netlink_skb_parms *nsp)
+{
+}
+
+int us_interaction_create(void)
+{
+ int res;
+
+ res = cn_add_callback(&cn_swap_id, cn_swap_name, us_interaction_recv_msg);
+ if (res)
+ return -E_SD_NL_INIT_ERR;
+
+ return E_SD_SUCCESS;
+}
+
+void us_interaction_destroy(void)
+{
+ cn_del_callback(&cn_swap_id);
+}
--- /dev/null
+/*
+ * SWAP device driver
+ * modules/driver/us_interaction.h
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Copyright (C) Samsung Electronics, 2014
+ *
+ * 2014 Alexander Aksenov <a.aksenov@samsung.com>: Driver user<-> kernel
+ * connect implement
+ *
+ */
+
+#ifndef __US_INTERACTION_H__
+#define __US_INTERACTION_H__
+
+int us_interaction_create(void);
+void us_interaction_destroy(void);
+int us_interaction_send_msg(const void *data, size_t size);
+
+#endif /* __US_INTERACTION_H__ */
--- /dev/null
+/*
+ * SWAP device driver
+ * modules/driver/us_interaction_msg.h
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Copyright (C) Samsung Electronics, 2014
+ *
+ * 2014 Alexander Aksenov <a.aksenov@samsung.com>: Driver user<-> kernel
+ * connect implement
+ *
+ */
+
+#ifndef __US_INTERACTION_MSG_H__
+#define __US_INTERACTION_MSG_H__
+
+#define CN_SWAP_IDX 0x22 /* Should be unique throughout the system */
+#define CN_SWAP_VAL 0x1 /* Just the same in kernel and user */
+#define CN_DAEMON_GROUP 0x1 /* Listener group. Connector works a bit faster
+ * when using one */
+
+enum us_interaction_k2u_msg_t {
+ US_INT_PAUSE_APPS = 1, /* Make daemon pause apps */
+ US_INT_CONT_APPS = 2 /* Make daemon continue apps */
+};
+
+#endif /* __US_INTERACTION_MSG_H__ */
projects / kernel / swap-modules.git / commitdiff