| /* |
| * Copyright (c) 2018 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. |
| */ |
| |
| /** |
| * DOC: qdf_idr |
| * This file provides the ability to map an ID to a pointer |
| */ |
| |
| /* Include files */ |
| #include <qdf_idr.h> |
| #include <qdf_module.h> |
| |
| #define QDF_IDR_START 0x100 |
| #define QDF_IDR_END 0 |
| |
| static int qdf_idr_gpf_flag(void) |
| { |
| if (in_interrupt() || irqs_disabled() || in_atomic()) |
| return GFP_ATOMIC; |
| |
| return GFP_KERNEL; |
| } |
| |
| #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 9, 0) |
| /** |
| * __qdf_idr_alloc() - Allocates an unused ID |
| * @idp: pointer to qdf idr |
| * @ptr: pointer to be associated with the new ID |
| * @start: the minimum ID |
| * @end: the maximum ID |
| * |
| * Return: new ID |
| */ |
| static inline int32_t |
| __qdf_idr_alloc(qdf_idr *idp, void *ptr, int32_t start, int32_t end) |
| { |
| int32_t id = 0; |
| |
| idr_get_new(&idp->idr, ptr, &id); |
| |
| return id; |
| } |
| #else |
| static inline int32_t |
| __qdf_idr_alloc(qdf_idr *idp, void *ptr, int32_t start, int32_t end) |
| { |
| return idr_alloc(&idp->idr, ptr, start, end, qdf_idr_gpf_flag()); |
| } |
| #endif |
| |
| QDF_STATUS qdf_idr_create(qdf_idr *idp) |
| { |
| if (!idp) |
| return QDF_STATUS_E_INVAL; |
| |
| qdf_spinlock_create(&idp->lock); |
| |
| idr_init(&idp->idr); |
| |
| return QDF_STATUS_SUCCESS; |
| } |
| |
| qdf_export_symbol(qdf_idr_create); |
| |
| QDF_STATUS qdf_idr_destroy(qdf_idr *idp) |
| { |
| if (!idp) |
| return QDF_STATUS_E_INVAL; |
| |
| qdf_spinlock_destroy(&idp->lock); |
| idr_destroy(&idp->idr); |
| |
| return QDF_STATUS_SUCCESS; |
| } |
| |
| qdf_export_symbol(qdf_idr_destroy); |
| |
| QDF_STATUS qdf_idr_alloc(qdf_idr *idp, void *ptr, int32_t *id) |
| { |
| int local_id; |
| |
| if (!idp || !ptr) |
| return QDF_STATUS_E_INVAL; |
| |
| qdf_spinlock_acquire(&idp->lock); |
| local_id = __qdf_idr_alloc(idp, ptr, QDF_IDR_START, QDF_IDR_END); |
| qdf_spinlock_release(&idp->lock); |
| if (local_id < QDF_IDR_START) |
| return QDF_STATUS_E_FAILURE; |
| |
| *id = local_id; |
| |
| return QDF_STATUS_SUCCESS; |
| } |
| |
| qdf_export_symbol(qdf_idr_alloc); |
| |
| QDF_STATUS qdf_idr_remove(qdf_idr *idp, int32_t id) |
| { |
| if (!idp || id < QDF_IDR_START) |
| return QDF_STATUS_E_INVAL; |
| |
| qdf_spinlock_acquire(&idp->lock); |
| if (idr_find(&idp->idr, id)) |
| idr_remove(&idp->idr, id); |
| qdf_spinlock_release(&idp->lock); |
| |
| return QDF_STATUS_SUCCESS; |
| } |
| |
| qdf_export_symbol(qdf_idr_remove); |
| |
| QDF_STATUS qdf_idr_find(qdf_idr *idp, int32_t id, void **ptr) |
| { |
| if (!ptr || (id < QDF_IDR_START)) |
| return QDF_STATUS_E_INVAL; |
| |
| qdf_spinlock_acquire(&idp->lock); |
| *ptr = idr_find(&idp->idr, id); |
| qdf_spinlock_release(&idp->lock); |
| if (!(*ptr)) |
| return QDF_STATUS_E_INVAL; |
| else |
| return QDF_STATUS_SUCCESS; |
| } |
| |
| qdf_export_symbol(qdf_idr_find); |
| |