| /* |
| * Copyright (c) 2019 The Linux Foundation. All rights reserved. |
| * |
| * Permission to use, copy, modify, and/or distribute this software for |
| * any purpose with or without fee is hereby granted, provided that the |
| * above copyright notice and this permission notice appear in all |
| * copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL |
| * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE |
| * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL |
| * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
| * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| * PERFORMANCE OF THIS SOFTWARE. |
| */ |
| |
| #include "__osif_driver_sync.h" |
| #include "osif_driver_sync.h" |
| #include "qdf_lock.h" |
| #include "qdf_status.h" |
| #include "qdf_types.h" |
| #include "wlan_dsc_driver.h" |
| #include "wlan_dsc_psoc.h" |
| |
| /** |
| * struct osif_driver_sync - a driver synchronization context |
| * @dsc_driver: the dsc_driver used for synchronization |
| * @in_use: indicates if the context is being used |
| * @is_registered: indicates if the context is registered for |
| * transitions/operations |
| */ |
| struct osif_driver_sync { |
| struct dsc_driver *dsc_driver; |
| bool in_use; |
| bool is_registered; |
| }; |
| |
| static struct osif_driver_sync __osif_driver_sync; |
| static qdf_spinlock_t __osif_driver_sync_lock; |
| |
| #define osif_driver_sync_lock_create() \ |
| qdf_spinlock_create(&__osif_driver_sync_lock) |
| #define osif_driver_sync_lock_destroy() \ |
| qdf_spinlock_destroy(&__osif_driver_sync_lock) |
| #define osif_driver_sync_lock() qdf_spin_lock_bh(&__osif_driver_sync_lock) |
| #define osif_driver_sync_unlock() qdf_spin_unlock_bh(&__osif_driver_sync_lock) |
| #define osif_driver_sync_lock_assert() \ |
| QDF_BUG(qdf_spin_is_locked(&__osif_driver_sync_lock)) |
| |
| static struct osif_driver_sync *osif_driver_sync_lookup(void) |
| { |
| osif_driver_sync_lock_assert(); |
| |
| if (!__osif_driver_sync.is_registered) |
| return NULL; |
| |
| return &__osif_driver_sync; |
| } |
| |
| static struct osif_driver_sync *osif_driver_sync_get(void) |
| { |
| osif_driver_sync_lock_assert(); |
| |
| if (__osif_driver_sync.in_use) |
| return NULL; |
| |
| __osif_driver_sync.in_use = true; |
| |
| return &__osif_driver_sync; |
| } |
| |
| static void osif_driver_sync_put(struct osif_driver_sync *driver_sync) |
| { |
| osif_driver_sync_lock_assert(); |
| |
| qdf_mem_zero(driver_sync, sizeof(*driver_sync)); |
| } |
| |
| int osif_driver_sync_create(struct osif_driver_sync **out_driver_sync) |
| { |
| QDF_STATUS status; |
| struct osif_driver_sync *driver_sync; |
| |
| QDF_BUG(out_driver_sync); |
| if (!out_driver_sync) |
| return -EINVAL; |
| |
| osif_driver_sync_lock(); |
| driver_sync = osif_driver_sync_get(); |
| osif_driver_sync_unlock(); |
| if (!driver_sync) |
| return -ENOMEM; |
| |
| status = dsc_driver_create(&driver_sync->dsc_driver); |
| if (QDF_IS_STATUS_ERROR(status)) |
| goto sync_put; |
| |
| *out_driver_sync = driver_sync; |
| |
| return 0; |
| |
| sync_put: |
| osif_driver_sync_lock(); |
| osif_driver_sync_put(driver_sync); |
| osif_driver_sync_unlock(); |
| |
| return qdf_status_to_os_return(status); |
| } |
| |
| int |
| __osif_driver_sync_create_and_trans(struct osif_driver_sync **out_driver_sync, |
| const char *desc) |
| { |
| struct osif_driver_sync *driver_sync; |
| QDF_STATUS status; |
| int errno; |
| |
| errno = osif_driver_sync_create(&driver_sync); |
| if (errno) |
| return errno; |
| |
| status = dsc_driver_trans_start(driver_sync->dsc_driver, desc); |
| if (QDF_IS_STATUS_ERROR(status)) |
| goto sync_destroy; |
| |
| *out_driver_sync = driver_sync; |
| |
| return 0; |
| |
| sync_destroy: |
| osif_driver_sync_destroy(driver_sync); |
| |
| return qdf_status_to_os_return(status); |
| } |
| |
| void osif_driver_sync_destroy(struct osif_driver_sync *driver_sync) |
| { |
| QDF_BUG(driver_sync); |
| if (!driver_sync) |
| return; |
| |
| dsc_driver_destroy(&driver_sync->dsc_driver); |
| |
| osif_driver_sync_lock(); |
| osif_driver_sync_put(driver_sync); |
| osif_driver_sync_unlock(); |
| } |
| |
| void osif_driver_sync_register(struct osif_driver_sync *driver_sync) |
| { |
| QDF_BUG(driver_sync); |
| if (!driver_sync) |
| return; |
| |
| osif_driver_sync_lock(); |
| driver_sync->is_registered = true; |
| osif_driver_sync_unlock(); |
| } |
| |
| struct osif_driver_sync *osif_driver_sync_unregister(void) |
| { |
| struct osif_driver_sync *driver_sync; |
| |
| osif_driver_sync_lock(); |
| driver_sync = osif_driver_sync_lookup(); |
| if (driver_sync) |
| driver_sync->is_registered = false; |
| osif_driver_sync_unlock(); |
| |
| return driver_sync; |
| } |
| |
| typedef QDF_STATUS (*driver_start_func)(struct dsc_driver *, const char *); |
| |
| static int |
| __osif_driver_sync_start_callback(struct osif_driver_sync **out_driver_sync, |
| const char *desc, |
| driver_start_func driver_start_cb) |
| { |
| QDF_STATUS status; |
| struct osif_driver_sync *driver_sync; |
| |
| osif_driver_sync_lock_assert(); |
| |
| *out_driver_sync = NULL; |
| |
| driver_sync = osif_driver_sync_lookup(); |
| if (!driver_sync) |
| return -EAGAIN; |
| |
| status = driver_start_cb(driver_sync->dsc_driver, desc); |
| if (QDF_IS_STATUS_ERROR(status)) |
| return qdf_status_to_os_return(status); |
| |
| *out_driver_sync = driver_sync; |
| |
| return 0; |
| } |
| |
| int __osif_driver_sync_trans_start(struct osif_driver_sync **out_driver_sync, |
| const char *desc) |
| { |
| int errno; |
| |
| osif_driver_sync_lock(); |
| errno = __osif_driver_sync_start_callback(out_driver_sync, desc, |
| dsc_driver_trans_start); |
| osif_driver_sync_unlock(); |
| |
| return errno; |
| } |
| |
| int |
| __osif_driver_sync_trans_start_wait(struct osif_driver_sync **out_driver_sync, |
| const char *desc) |
| { |
| int errno; |
| |
| osif_driver_sync_lock(); |
| errno = __osif_driver_sync_start_callback(out_driver_sync, desc, |
| dsc_driver_trans_start_wait); |
| osif_driver_sync_unlock(); |
| |
| return errno; |
| } |
| |
| void osif_driver_sync_trans_stop(struct osif_driver_sync *driver_sync) |
| { |
| dsc_driver_trans_stop(driver_sync->dsc_driver); |
| } |
| |
| void osif_driver_sync_assert_trans_protected(void) |
| { |
| struct osif_driver_sync *driver_sync; |
| |
| osif_driver_sync_lock(); |
| |
| driver_sync = osif_driver_sync_lookup(); |
| QDF_BUG(driver_sync); |
| if (driver_sync) |
| dsc_driver_assert_trans_protected(driver_sync->dsc_driver); |
| |
| osif_driver_sync_unlock(); |
| } |
| |
| int __osif_driver_sync_op_start(struct osif_driver_sync **out_driver_sync, |
| const char *func) |
| { |
| int errno; |
| |
| osif_driver_sync_lock(); |
| errno = __osif_driver_sync_start_callback(out_driver_sync, func, |
| _dsc_driver_op_start); |
| osif_driver_sync_unlock(); |
| |
| return errno; |
| } |
| |
| void __osif_driver_sync_op_stop(struct osif_driver_sync *driver_sync, |
| const char *func) |
| { |
| _dsc_driver_op_stop(driver_sync->dsc_driver, func); |
| } |
| |
| void osif_driver_sync_wait_for_ops(struct osif_driver_sync *driver_sync) |
| { |
| dsc_driver_wait_for_ops(driver_sync->dsc_driver); |
| } |
| |
| void osif_driver_sync_init(void) |
| { |
| osif_driver_sync_lock_create(); |
| } |
| |
| void osif_driver_sync_deinit(void) |
| { |
| osif_driver_sync_lock_destroy(); |
| } |
| |
| static QDF_STATUS |
| __osif_driver_sync_dsc_psoc_create(struct dsc_psoc **out_dsc_psoc) |
| { |
| struct osif_driver_sync *driver_sync; |
| |
| osif_driver_sync_lock_assert(); |
| |
| driver_sync = osif_driver_sync_lookup(); |
| if (!driver_sync) |
| return QDF_STATUS_E_INVAL; |
| |
| return dsc_psoc_create(driver_sync->dsc_driver, out_dsc_psoc); |
| } |
| |
| QDF_STATUS osif_driver_sync_dsc_psoc_create(struct dsc_psoc **out_dsc_psoc) |
| { |
| QDF_STATUS status; |
| |
| osif_driver_sync_lock(); |
| status = __osif_driver_sync_dsc_psoc_create(out_dsc_psoc); |
| osif_driver_sync_unlock(); |
| |
| return status; |
| } |
| |