/* * Copyright (c) 2014-2019 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. */ /** * DOC: qdf_nbuf.c * QCA driver framework(QDF) network buffer management APIs */ #include #include #include #include #include #include #include #include #include #include "qdf_flex_mem.h" #include #include #include #include #include #include #include #include #include #include #include "qdf_str.h" #if defined(FEATURE_TSO) #include #include #include #include #include #endif /* FEATURE_TSO */ #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 13, 0) #define qdf_nbuf_users_inc atomic_inc #define qdf_nbuf_users_dec atomic_dec #define qdf_nbuf_users_set atomic_set #define qdf_nbuf_users_read atomic_read #else #define qdf_nbuf_users_inc refcount_inc #define qdf_nbuf_users_dec refcount_dec #define qdf_nbuf_users_set refcount_set #define qdf_nbuf_users_read refcount_read #endif /* KERNEL_VERSION(4, 13, 0) */ #define IEEE80211_RADIOTAP_VHT_BW_20 0 #define IEEE80211_RADIOTAP_VHT_BW_40 1 #define IEEE80211_RADIOTAP_VHT_BW_80 2 #define IEEE80211_RADIOTAP_VHT_BW_160 3 #define RADIOTAP_VHT_BW_20 0 #define RADIOTAP_VHT_BW_40 1 #define RADIOTAP_VHT_BW_80 4 #define RADIOTAP_VHT_BW_160 11 /* channel number to freq conversion */ #define CHANNEL_NUM_14 14 #define CHANNEL_NUM_15 15 #define CHANNEL_NUM_27 27 #define CHANNEL_NUM_35 35 #define CHANNEL_NUM_182 182 #define CHANNEL_NUM_197 197 #define CHANNEL_FREQ_2484 2484 #define CHANNEL_FREQ_2407 2407 #define CHANNEL_FREQ_2512 2512 #define CHANNEL_FREQ_5000 5000 #define CHANNEL_FREQ_4000 4000 #define FREQ_MULTIPLIER_CONST_5MHZ 5 #define FREQ_MULTIPLIER_CONST_20MHZ 20 #define RADIOTAP_5G_SPECTRUM_CHANNEL 0x0100 #define RADIOTAP_2G_SPECTRUM_CHANNEL 0x0080 #define RADIOTAP_CCK_CHANNEL 0x0020 #define RADIOTAP_OFDM_CHANNEL 0x0040 #ifdef CONFIG_MCL #include struct qdf_track_timer { qdf_mc_timer_t track_timer; qdf_atomic_t alloc_fail_cnt; }; static struct qdf_track_timer alloc_track_timer; #define QDF_NBUF_ALLOC_EXPIRE_TIMER_MS 5000 #define QDF_NBUF_ALLOC_EXPIRE_CNT_THRESHOLD 50 #endif /* Packet Counter */ static uint32_t nbuf_tx_mgmt[QDF_NBUF_TX_PKT_STATE_MAX]; static uint32_t nbuf_tx_data[QDF_NBUF_TX_PKT_STATE_MAX]; #ifdef QDF_NBUF_GLOBAL_COUNT #define NBUF_DEBUGFS_NAME "nbuf_counters" static qdf_atomic_t nbuf_count; #endif /** * qdf_nbuf_tx_desc_count_display() - Displays the packet counter * * Return: none */ void qdf_nbuf_tx_desc_count_display(void) { qdf_debug("Current Snapshot of the Driver:"); qdf_debug("Data Packets:"); qdf_debug("HDD %d TXRX_Q %d TXRX %d HTT %d", nbuf_tx_data[QDF_NBUF_TX_PKT_HDD] - (nbuf_tx_data[QDF_NBUF_TX_PKT_TXRX] + nbuf_tx_data[QDF_NBUF_TX_PKT_TXRX_ENQUEUE] - nbuf_tx_data[QDF_NBUF_TX_PKT_TXRX_DEQUEUE]), nbuf_tx_data[QDF_NBUF_TX_PKT_TXRX_ENQUEUE] - nbuf_tx_data[QDF_NBUF_TX_PKT_TXRX_DEQUEUE], nbuf_tx_data[QDF_NBUF_TX_PKT_TXRX] - nbuf_tx_data[QDF_NBUF_TX_PKT_HTT], nbuf_tx_data[QDF_NBUF_TX_PKT_HTT] - nbuf_tx_data[QDF_NBUF_TX_PKT_HTC]); qdf_debug(" HTC %d HIF %d CE %d TX_COMP %d", nbuf_tx_data[QDF_NBUF_TX_PKT_HTC] - nbuf_tx_data[QDF_NBUF_TX_PKT_HIF], nbuf_tx_data[QDF_NBUF_TX_PKT_HIF] - nbuf_tx_data[QDF_NBUF_TX_PKT_CE], nbuf_tx_data[QDF_NBUF_TX_PKT_CE] - nbuf_tx_data[QDF_NBUF_TX_PKT_FREE], nbuf_tx_data[QDF_NBUF_TX_PKT_FREE]); qdf_debug("Mgmt Packets:"); qdf_debug("TXRX_Q %d TXRX %d HTT %d HTC %d HIF %d CE %d TX_COMP %d", nbuf_tx_mgmt[QDF_NBUF_TX_PKT_TXRX_ENQUEUE] - nbuf_tx_mgmt[QDF_NBUF_TX_PKT_TXRX_DEQUEUE], nbuf_tx_mgmt[QDF_NBUF_TX_PKT_TXRX] - nbuf_tx_mgmt[QDF_NBUF_TX_PKT_HTT], nbuf_tx_mgmt[QDF_NBUF_TX_PKT_HTT] - nbuf_tx_mgmt[QDF_NBUF_TX_PKT_HTC], nbuf_tx_mgmt[QDF_NBUF_TX_PKT_HTC] - nbuf_tx_mgmt[QDF_NBUF_TX_PKT_HIF], nbuf_tx_mgmt[QDF_NBUF_TX_PKT_HIF] - nbuf_tx_mgmt[QDF_NBUF_TX_PKT_CE], nbuf_tx_mgmt[QDF_NBUF_TX_PKT_CE] - nbuf_tx_mgmt[QDF_NBUF_TX_PKT_FREE], nbuf_tx_mgmt[QDF_NBUF_TX_PKT_FREE]); } qdf_export_symbol(qdf_nbuf_tx_desc_count_display); /** * qdf_nbuf_tx_desc_count_update() - Updates the layer packet counter * @packet_type : packet type either mgmt/data * @current_state : layer at which the packet currently present * * Return: none */ static inline void qdf_nbuf_tx_desc_count_update(uint8_t packet_type, uint8_t current_state) { switch (packet_type) { case QDF_NBUF_TX_PKT_MGMT_TRACK: nbuf_tx_mgmt[current_state]++; break; case QDF_NBUF_TX_PKT_DATA_TRACK: nbuf_tx_data[current_state]++; break; default: break; } } qdf_export_symbol(qdf_nbuf_tx_desc_count_update); /** * qdf_nbuf_tx_desc_count_clear() - Clears packet counter for both data, mgmt * * Return: none */ void qdf_nbuf_tx_desc_count_clear(void) { memset(nbuf_tx_mgmt, 0, sizeof(nbuf_tx_mgmt)); memset(nbuf_tx_data, 0, sizeof(nbuf_tx_data)); } qdf_export_symbol(qdf_nbuf_tx_desc_count_clear); /** * qdf_nbuf_set_state() - Updates the packet state * @nbuf: network buffer * @current_state : layer at which the packet currently is * * This function updates the packet state to the layer at which the packet * currently is * * Return: none */ void qdf_nbuf_set_state(qdf_nbuf_t nbuf, uint8_t current_state) { /* * Only Mgmt, Data Packets are tracked. WMI messages * such as scan commands are not tracked */ uint8_t packet_type; packet_type = QDF_NBUF_CB_TX_PACKET_TRACK(nbuf); if ((packet_type != QDF_NBUF_TX_PKT_DATA_TRACK) && (packet_type != QDF_NBUF_TX_PKT_MGMT_TRACK)) { return; } QDF_NBUF_CB_TX_PACKET_STATE(nbuf) = current_state; qdf_nbuf_tx_desc_count_update(packet_type, current_state); } qdf_export_symbol(qdf_nbuf_set_state); #ifdef CONFIG_MCL /** * __qdf_nbuf_start_replenish_timer - Start alloc fail replenish timer * * This function starts the alloc fail replenish timer. * * Return: void */ static void __qdf_nbuf_start_replenish_timer(void) { qdf_atomic_inc(&alloc_track_timer.alloc_fail_cnt); if (qdf_mc_timer_get_current_state(&alloc_track_timer.track_timer) != QDF_TIMER_STATE_RUNNING) qdf_mc_timer_start(&alloc_track_timer.track_timer, QDF_NBUF_ALLOC_EXPIRE_TIMER_MS); } /** * __qdf_nbuf_stop_replenish_timer - Stop alloc fail replenish timer * * This function stops the alloc fail replenish timer. * * Return: void */ static void __qdf_nbuf_stop_replenish_timer(void) { if (qdf_atomic_read(&alloc_track_timer.alloc_fail_cnt) == 0) return; qdf_atomic_set(&alloc_track_timer.alloc_fail_cnt, 0); if (qdf_mc_timer_get_current_state(&alloc_track_timer.track_timer) == QDF_TIMER_STATE_RUNNING) qdf_mc_timer_stop(&alloc_track_timer.track_timer); } /** * qdf_replenish_expire_handler - Replenish expire handler * * This function triggers when the alloc fail replenish timer expires. * * Return: void */ static void qdf_replenish_expire_handler(void *arg) { if (qdf_atomic_read(&alloc_track_timer.alloc_fail_cnt) > QDF_NBUF_ALLOC_EXPIRE_CNT_THRESHOLD) { qdf_print("ERROR: NBUF allocation timer expired Fail count %d", qdf_atomic_read(&alloc_track_timer.alloc_fail_cnt)); /* Error handling here */ } } /** * __qdf_nbuf_init_replenish_timer - Initialize the alloc replenish timer * * This function initializes the nbuf alloc fail replenish timer. * * Return: void */ void __qdf_nbuf_init_replenish_timer(void) { qdf_mc_timer_init(&alloc_track_timer.track_timer, QDF_TIMER_TYPE_SW, qdf_replenish_expire_handler, NULL); } /** * __qdf_nbuf_deinit_replenish_timer - Deinitialize the alloc replenish timer * * This function deinitializes the nbuf alloc fail replenish timer. * * Return: void */ void __qdf_nbuf_deinit_replenish_timer(void) { __qdf_nbuf_stop_replenish_timer(); qdf_mc_timer_destroy(&alloc_track_timer.track_timer); } #else static inline void __qdf_nbuf_start_replenish_timer(void) {} static inline void __qdf_nbuf_stop_replenish_timer(void) {} #endif /* globals do not need to be initialized to NULL/0 */ qdf_nbuf_trace_update_t qdf_trace_update_cb; qdf_nbuf_free_t nbuf_free_cb; #ifdef QDF_NBUF_GLOBAL_COUNT /** * __qdf_nbuf_count_get() - get nbuf global count * * Return: nbuf global count */ int __qdf_nbuf_count_get(void) { return qdf_atomic_read(&nbuf_count); } qdf_export_symbol(__qdf_nbuf_count_get); /** * __qdf_nbuf_count_inc() - increment nbuf global count * * @buf: sk buff * * Return: void */ void __qdf_nbuf_count_inc(qdf_nbuf_t nbuf) { qdf_atomic_inc(&nbuf_count); } qdf_export_symbol(__qdf_nbuf_count_inc); /** * __qdf_nbuf_count_dec() - decrement nbuf global count * * @buf: sk buff * * Return: void */ void __qdf_nbuf_count_dec(__qdf_nbuf_t nbuf) { qdf_atomic_dec(&nbuf_count); } qdf_export_symbol(__qdf_nbuf_count_dec); #endif #if defined(QCA_WIFI_QCA8074) && defined (BUILD_X86) struct sk_buff *__qdf_nbuf_alloc(qdf_device_t osdev, size_t size, int reserve, int align, int prio, const char *func, uint32_t line) { struct sk_buff *skb; unsigned long offset; uint32_t lowmem_alloc_tries = 0; if (align) size += (align - 1); realloc: skb = dev_alloc_skb(size); if (skb) goto skb_alloc; skb = pld_nbuf_pre_alloc(size); if (!skb) { qdf_rl_nofl_err("NBUF alloc failed %zuB @ %s:%d", size, func, line); return NULL; } skb_alloc: /* Hawkeye M2M emulation cannot handle memory addresses below 0x50000040 * Though we are trying to reserve low memory upfront to prevent this, * we sometimes see SKBs allocated from low memory. */ if (virt_to_phys(qdf_nbuf_data(skb)) < 0x50000040) { lowmem_alloc_tries++; if (lowmem_alloc_tries > 100) { qdf_nofl_err("NBUF alloc failed %zuB @ %s:%d", size, func, line); return NULL; } else { /* Not freeing to make sure it * will not get allocated again */ goto realloc; } } memset(skb->cb, 0x0, sizeof(skb->cb)); /* * The default is for netbuf fragments to be interpreted * as wordstreams rather than bytestreams. */ QDF_NBUF_CB_TX_EXTRA_FRAG_WORDSTR_EFRAG(skb) = 1; QDF_NBUF_CB_TX_EXTRA_FRAG_WORDSTR_NBUF(skb) = 1; /* * XXX:how about we reserve first then align * Align & make sure that the tail & data are adjusted properly */ if (align) { offset = ((unsigned long)skb->data) % align; if (offset) skb_reserve(skb, align - offset); } /* * NOTE:alloc doesn't take responsibility if reserve unaligns the data * pointer */ skb_reserve(skb, reserve); qdf_nbuf_count_inc(skb); return skb; } #else struct sk_buff *__qdf_nbuf_alloc(qdf_device_t osdev, size_t size, int reserve, int align, int prio, const char *func, uint32_t line) { struct sk_buff *skb; unsigned long offset; int flags = GFP_KERNEL; if (align) size += (align - 1); if (in_interrupt() || irqs_disabled() || in_atomic()) { flags = GFP_ATOMIC; #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 4, 0) /* * Observed that kcompactd burns out CPU to make order-3 page. *__netdev_alloc_skb has 4k page fallback option just in case of * failing high order page allocation so we don't need to be * hard. Make kcompactd rest in piece. */ flags = flags & ~__GFP_KSWAPD_RECLAIM; #endif } skb = __netdev_alloc_skb(NULL, size, flags); if (skb) goto skb_alloc; skb = pld_nbuf_pre_alloc(size); if (!skb) { qdf_rl_nofl_err("NBUF alloc failed %zuB @ %s:%d", size, func, line); __qdf_nbuf_start_replenish_timer(); return NULL; } else { __qdf_nbuf_stop_replenish_timer(); } skb_alloc: memset(skb->cb, 0x0, sizeof(skb->cb)); /* * The default is for netbuf fragments to be interpreted * as wordstreams rather than bytestreams. */ QDF_NBUF_CB_TX_EXTRA_FRAG_WORDSTR_EFRAG(skb) = 1; QDF_NBUF_CB_TX_EXTRA_FRAG_WORDSTR_NBUF(skb) = 1; /* * XXX:how about we reserve first then align * Align & make sure that the tail & data are adjusted properly */ if (align) { offset = ((unsigned long)skb->data) % align; if (offset) skb_reserve(skb, align - offset); } /* * NOTE:alloc doesn't take responsibility if reserve unaligns the data * pointer */ skb_reserve(skb, reserve); qdf_nbuf_count_inc(skb); return skb; } #endif qdf_export_symbol(__qdf_nbuf_alloc); /** * __qdf_nbuf_free() - free the nbuf its interrupt safe * @skb: Pointer to network buffer * * Return: none */ #ifdef CONFIG_MCL void __qdf_nbuf_free(struct sk_buff *skb) { if (pld_nbuf_pre_alloc_free(skb)) return; qdf_nbuf_count_dec(skb); if (nbuf_free_cb) nbuf_free_cb(skb); else dev_kfree_skb_any(skb); } #else void __qdf_nbuf_free(struct sk_buff *skb) { if (pld_nbuf_pre_alloc_free(skb)) return; qdf_nbuf_count_dec(skb); dev_kfree_skb_any(skb); } #endif qdf_export_symbol(__qdf_nbuf_free); #ifdef NBUF_MEMORY_DEBUG enum qdf_nbuf_event_type { QDF_NBUF_ALLOC, QDF_NBUF_ALLOC_CLONE, QDF_NBUF_ALLOC_COPY, QDF_NBUF_ALLOC_FAILURE, QDF_NBUF_FREE, QDF_NBUF_MAP, QDF_NBUF_UNMAP, }; struct qdf_nbuf_event { qdf_nbuf_t nbuf; char func[QDF_MEM_FUNC_NAME_SIZE]; uint32_t line; enum qdf_nbuf_event_type type; uint64_t timestamp; }; #define QDF_NBUF_HISTORY_SIZE 4096 static qdf_atomic_t qdf_nbuf_history_index; static struct qdf_nbuf_event qdf_nbuf_history[QDF_NBUF_HISTORY_SIZE]; static int32_t qdf_nbuf_circular_index_next(qdf_atomic_t *index, int size) { int32_t next = qdf_atomic_inc_return(index); if (next == size) qdf_atomic_sub(size, index); return next % size; } static void qdf_nbuf_history_add(qdf_nbuf_t nbuf, const char *func, uint32_t line, enum qdf_nbuf_event_type type) { int32_t idx = qdf_nbuf_circular_index_next(&qdf_nbuf_history_index, QDF_NBUF_HISTORY_SIZE); struct qdf_nbuf_event *event = &qdf_nbuf_history[idx]; event->nbuf = nbuf; qdf_str_lcopy(event->func, func, QDF_MEM_FUNC_NAME_SIZE); event->line = line; event->type = type; event->timestamp = qdf_get_log_timestamp(); } #endif /* NBUF_MEMORY_DEBUG */ #ifdef NBUF_MAP_UNMAP_DEBUG struct qdf_nbuf_map_metadata { struct hlist_node node; qdf_nbuf_t nbuf; char func[QDF_MEM_FUNC_NAME_SIZE]; uint32_t line; }; DEFINE_QDF_FLEX_MEM_POOL(qdf_nbuf_map_pool, sizeof(struct qdf_nbuf_map_metadata), 0); #define QDF_NBUF_MAP_HT_BITS 10 /* 1024 buckets */ static DECLARE_HASHTABLE(qdf_nbuf_map_ht, QDF_NBUF_MAP_HT_BITS); static qdf_spinlock_t qdf_nbuf_map_lock; static void qdf_nbuf_map_tracking_init(void) { qdf_flex_mem_init(&qdf_nbuf_map_pool); hash_init(qdf_nbuf_map_ht); qdf_spinlock_create(&qdf_nbuf_map_lock); } static void qdf_nbuf_map_leaks_print(void) { struct qdf_nbuf_map_metadata *meta; int bucket; uint32_t count = 0; QDF_BUG(qdf_spin_is_locked(&qdf_nbuf_map_lock)); qdf_nofl_alert("Nbuf map-no-unmap events detected!"); qdf_nofl_alert("-----------------------------------------------------"); hash_for_each(qdf_nbuf_map_ht, bucket, meta, node) { count++; qdf_nofl_alert("0x%zx @ %s:%u", (uintptr_t)meta->nbuf, meta->func, meta->line); } QDF_DEBUG_PANIC("%u fatal nbuf map-no-unmap events detected!", count); } void qdf_nbuf_map_check_for_leaks(void) { qdf_spin_lock_irqsave(&qdf_nbuf_map_lock); if (!hash_empty(qdf_nbuf_map_ht)) qdf_nbuf_map_leaks_print(); qdf_spin_unlock_irqrestore(&qdf_nbuf_map_lock); } static void qdf_nbuf_map_tracking_deinit(void) { qdf_nbuf_map_check_for_leaks(); qdf_spinlock_destroy(&qdf_nbuf_map_lock); qdf_flex_mem_deinit(&qdf_nbuf_map_pool); } static struct qdf_nbuf_map_metadata *qdf_nbuf_meta_get(qdf_nbuf_t nbuf) { struct qdf_nbuf_map_metadata *meta; hash_for_each_possible(qdf_nbuf_map_ht, meta, node, (size_t)nbuf) { if (meta->nbuf == nbuf) return meta; } return NULL; } static QDF_STATUS qdf_nbuf_track_map(qdf_nbuf_t nbuf, const char *func, uint32_t line) { struct qdf_nbuf_map_metadata *meta; QDF_BUG(nbuf); if (!nbuf) { qdf_err("Cannot map null nbuf"); return QDF_STATUS_E_INVAL; } qdf_spin_lock_irqsave(&qdf_nbuf_map_lock); meta = qdf_nbuf_meta_get(nbuf); qdf_spin_unlock_irqrestore(&qdf_nbuf_map_lock); if (meta) QDF_DEBUG_PANIC( "Double nbuf map detected @ %s:%u; last map from %s:%u", func, line, meta->func, meta->line); meta = qdf_flex_mem_alloc(&qdf_nbuf_map_pool); if (!meta) { qdf_err("Failed to allocate nbuf map tracking metadata"); return QDF_STATUS_E_NOMEM; } meta->nbuf = nbuf; qdf_str_lcopy(meta->func, func, QDF_MEM_FUNC_NAME_SIZE); meta->line = line; qdf_spin_lock_irqsave(&qdf_nbuf_map_lock); hash_add(qdf_nbuf_map_ht, &meta->node, (size_t)nbuf); qdf_spin_unlock_irqrestore(&qdf_nbuf_map_lock); qdf_nbuf_history_add(nbuf, func, line, QDF_NBUF_MAP); return QDF_STATUS_SUCCESS; } static void qdf_nbuf_untrack_map(qdf_nbuf_t nbuf, const char *func, uint32_t line) { struct qdf_nbuf_map_metadata *meta; QDF_BUG(nbuf); if (!nbuf) { qdf_err("Cannot unmap null nbuf"); return; } qdf_spin_lock_irqsave(&qdf_nbuf_map_lock); meta = qdf_nbuf_meta_get(nbuf); if (!meta) QDF_DEBUG_PANIC( "Double nbuf unmap or unmap without map detected @ %s:%u", func, line); hash_del(&meta->node); qdf_spin_unlock_irqrestore(&qdf_nbuf_map_lock); qdf_flex_mem_free(&qdf_nbuf_map_pool, meta); qdf_nbuf_history_add(nbuf, func, line, QDF_NBUF_UNMAP); } QDF_STATUS qdf_nbuf_map_debug(qdf_device_t osdev, qdf_nbuf_t buf, qdf_dma_dir_t dir, const char *func, uint32_t line) { QDF_STATUS status; status = qdf_nbuf_track_map(buf, func, line); if (QDF_IS_STATUS_ERROR(status)) return status; status = __qdf_nbuf_map(osdev, buf, dir); if (QDF_IS_STATUS_ERROR(status)) qdf_nbuf_untrack_map(buf, func, line); return status; } qdf_export_symbol(qdf_nbuf_map_debug); void qdf_nbuf_unmap_debug(qdf_device_t osdev, qdf_nbuf_t buf, qdf_dma_dir_t dir, const char *func, uint32_t line) { qdf_nbuf_untrack_map(buf, func, line); __qdf_nbuf_unmap_single(osdev, buf, dir); } qdf_export_symbol(qdf_nbuf_unmap_debug); QDF_STATUS qdf_nbuf_map_single_debug(qdf_device_t osdev, qdf_nbuf_t buf, qdf_dma_dir_t dir, const char *func, uint32_t line) { QDF_STATUS status; status = qdf_nbuf_track_map(buf, func, line); if (QDF_IS_STATUS_ERROR(status)) return status; status = __qdf_nbuf_map_single(osdev, buf, dir); if (QDF_IS_STATUS_ERROR(status)) qdf_nbuf_untrack_map(buf, func, line); return status; } qdf_export_symbol(qdf_nbuf_map_single_debug); void qdf_nbuf_unmap_single_debug(qdf_device_t osdev, qdf_nbuf_t buf, qdf_dma_dir_t dir, const char *func, uint32_t line) { qdf_nbuf_untrack_map(buf, func, line); __qdf_nbuf_unmap_single(osdev, buf, dir); } qdf_export_symbol(qdf_nbuf_unmap_single_debug); QDF_STATUS qdf_nbuf_map_nbytes_debug(qdf_device_t osdev, qdf_nbuf_t buf, qdf_dma_dir_t dir, int nbytes, const char *func, uint32_t line) { QDF_STATUS status; status = qdf_nbuf_track_map(buf, func, line); if (QDF_IS_STATUS_ERROR(status)) return status; status = __qdf_nbuf_map_nbytes(osdev, buf, dir, nbytes); if (QDF_IS_STATUS_ERROR(status)) qdf_nbuf_untrack_map(buf, func, line); return status; } qdf_export_symbol(qdf_nbuf_map_nbytes_debug); void qdf_nbuf_unmap_nbytes_debug(qdf_device_t osdev, qdf_nbuf_t buf, qdf_dma_dir_t dir, int nbytes, const char *func, uint32_t line) { qdf_nbuf_untrack_map(buf, func, line); __qdf_nbuf_unmap_nbytes(osdev, buf, dir, nbytes); } qdf_export_symbol(qdf_nbuf_unmap_nbytes_debug); QDF_STATUS qdf_nbuf_map_nbytes_single_debug(qdf_device_t osdev, qdf_nbuf_t buf, qdf_dma_dir_t dir, int nbytes, const char *func, uint32_t line) { QDF_STATUS status; status = qdf_nbuf_track_map(buf, func, line); if (QDF_IS_STATUS_ERROR(status)) return status; status = __qdf_nbuf_map_nbytes_single(osdev, buf, dir, nbytes); if (QDF_IS_STATUS_ERROR(status)) qdf_nbuf_untrack_map(buf, func, line); return status; } qdf_export_symbol(qdf_nbuf_map_nbytes_single_debug); void qdf_nbuf_unmap_nbytes_single_debug(qdf_device_t osdev, qdf_nbuf_t buf, qdf_dma_dir_t dir, int nbytes, const char *func, uint32_t line) { qdf_nbuf_untrack_map(buf, func, line); __qdf_nbuf_unmap_nbytes_single(osdev, buf, dir, nbytes); } qdf_export_symbol(qdf_nbuf_unmap_nbytes_single_debug); static void qdf_nbuf_panic_on_free_if_mapped(qdf_nbuf_t nbuf, const char *func, uint32_t line) { struct qdf_nbuf_map_metadata *meta; qdf_spin_lock_irqsave(&qdf_nbuf_map_lock); meta = qdf_nbuf_meta_get(nbuf); if (meta) QDF_DEBUG_PANIC( "Nbuf freed @ %s:%u while mapped from %s:%u", kbasename(func), line, meta->func, meta->line); qdf_spin_unlock_irqrestore(&qdf_nbuf_map_lock); } #else static inline void qdf_nbuf_map_tracking_init(void) { } static inline void qdf_nbuf_map_tracking_deinit(void) { } static inline void qdf_nbuf_panic_on_free_if_mapped(qdf_nbuf_t nbuf, const char *func, uint32_t line) { } #endif /* NBUF_MAP_UNMAP_DEBUG */ /** * __qdf_nbuf_map() - map a buffer to local bus address space * @osdev: OS device * @bmap: Bitmap * @skb: Pointer to network buffer * @dir: Direction * * Return: QDF_STATUS */ #ifdef QDF_OS_DEBUG QDF_STATUS __qdf_nbuf_map(qdf_device_t osdev, struct sk_buff *skb, qdf_dma_dir_t dir) { struct skb_shared_info *sh = skb_shinfo(skb); qdf_assert((dir == QDF_DMA_TO_DEVICE) || (dir == QDF_DMA_FROM_DEVICE)); /* * Assume there's only a single fragment. * To support multiple fragments, it would be necessary to change * qdf_nbuf_t to be a separate object that stores meta-info * (including the bus address for each fragment) and a pointer * to the underlying sk_buff. */ qdf_assert(sh->nr_frags == 0); return __qdf_nbuf_map_single(osdev, skb, dir); } qdf_export_symbol(__qdf_nbuf_map); #else QDF_STATUS __qdf_nbuf_map(qdf_device_t osdev, struct sk_buff *skb, qdf_dma_dir_t dir) { return __qdf_nbuf_map_single(osdev, skb, dir); } qdf_export_symbol(__qdf_nbuf_map); #endif /** * __qdf_nbuf_unmap() - to unmap a previously mapped buf * @osdev: OS device * @skb: Pointer to network buffer * @dir: dma direction * * Return: none */ void __qdf_nbuf_unmap(qdf_device_t osdev, struct sk_buff *skb, qdf_dma_dir_t dir) { qdf_assert((dir == QDF_DMA_TO_DEVICE) || (dir == QDF_DMA_FROM_DEVICE)); /* * Assume there's a single fragment. * If this is not true, the assertion in __qdf_nbuf_map will catch it. */ __qdf_nbuf_unmap_single(osdev, skb, dir); } qdf_export_symbol(__qdf_nbuf_unmap); /** * __qdf_nbuf_map_single() - map a single buffer to local bus address space * @osdev: OS device * @skb: Pointer to network buffer * @dir: Direction * * Return: QDF_STATUS */ #if defined(A_SIMOS_DEVHOST) || defined(HIF_USB) || defined(HIF_SDIO) QDF_STATUS __qdf_nbuf_map_single(qdf_device_t osdev, qdf_nbuf_t buf, qdf_dma_dir_t dir) { qdf_dma_addr_t paddr; QDF_NBUF_CB_PADDR(buf) = paddr = (uintptr_t)buf->data; BUILD_BUG_ON(sizeof(paddr) < sizeof(buf->data)); BUILD_BUG_ON(sizeof(QDF_NBUF_CB_PADDR(buf)) < sizeof(buf->data)); return QDF_STATUS_SUCCESS; } qdf_export_symbol(__qdf_nbuf_map_single); #else QDF_STATUS __qdf_nbuf_map_single(qdf_device_t osdev, qdf_nbuf_t buf, qdf_dma_dir_t dir) { qdf_dma_addr_t paddr; /* assume that the OS only provides a single fragment */ QDF_NBUF_CB_PADDR(buf) = paddr = dma_map_single(osdev->dev, buf->data, skb_end_pointer(buf) - buf->data, __qdf_dma_dir_to_os(dir)); return dma_mapping_error(osdev->dev, paddr) ? QDF_STATUS_E_FAILURE : QDF_STATUS_SUCCESS; } qdf_export_symbol(__qdf_nbuf_map_single); #endif /** * __qdf_nbuf_unmap_single() - unmap a previously mapped buf * @osdev: OS device * @skb: Pointer to network buffer * @dir: Direction * * Return: none */ #if defined(A_SIMOS_DEVHOST) || defined(HIF_USB) || defined(HIF_SDIO) void __qdf_nbuf_unmap_single(qdf_device_t osdev, qdf_nbuf_t buf, qdf_dma_dir_t dir) { } #else void __qdf_nbuf_unmap_single(qdf_device_t osdev, qdf_nbuf_t buf, qdf_dma_dir_t dir) { if (QDF_NBUF_CB_PADDR(buf)) dma_unmap_single(osdev->dev, QDF_NBUF_CB_PADDR(buf), skb_end_pointer(buf) - buf->data, __qdf_dma_dir_to_os(dir)); } #endif qdf_export_symbol(__qdf_nbuf_unmap_single); /** * __qdf_nbuf_set_rx_cksum() - set rx checksum * @skb: Pointer to network buffer * @cksum: Pointer to checksum value * * Return: QDF_STATUS */ QDF_STATUS __qdf_nbuf_set_rx_cksum(struct sk_buff *skb, qdf_nbuf_rx_cksum_t *cksum) { switch (cksum->l4_result) { case QDF_NBUF_RX_CKSUM_NONE: skb->ip_summed = CHECKSUM_NONE; break; case QDF_NBUF_RX_CKSUM_TCP_UDP_UNNECESSARY: skb->ip_summed = CHECKSUM_UNNECESSARY; break; case QDF_NBUF_RX_CKSUM_TCP_UDP_HW: skb->ip_summed = CHECKSUM_PARTIAL; skb->csum = cksum->val; break; default: pr_err("Unknown checksum type\n"); qdf_assert(0); return QDF_STATUS_E_NOSUPPORT; } return QDF_STATUS_SUCCESS; } qdf_export_symbol(__qdf_nbuf_set_rx_cksum); /** * __qdf_nbuf_get_tx_cksum() - get tx checksum * @skb: Pointer to network buffer * * Return: TX checksum value */ qdf_nbuf_tx_cksum_t __qdf_nbuf_get_tx_cksum(struct sk_buff *skb) { switch (skb->ip_summed) { case CHECKSUM_NONE: return QDF_NBUF_TX_CKSUM_NONE; case CHECKSUM_PARTIAL: return QDF_NBUF_TX_CKSUM_TCP_UDP; case CHECKSUM_COMPLETE: return QDF_NBUF_TX_CKSUM_TCP_UDP_IP; default: return QDF_NBUF_TX_CKSUM_NONE; } } qdf_export_symbol(__qdf_nbuf_get_tx_cksum); /** * __qdf_nbuf_get_tid() - get tid * @skb: Pointer to network buffer * * Return: tid */ uint8_t __qdf_nbuf_get_tid(struct sk_buff *skb) { return skb->priority; } qdf_export_symbol(__qdf_nbuf_get_tid); /** * __qdf_nbuf_set_tid() - set tid * @skb: Pointer to network buffer * * Return: none */ void __qdf_nbuf_set_tid(struct sk_buff *skb, uint8_t tid) { skb->priority = tid; } qdf_export_symbol(__qdf_nbuf_set_tid); /** * __qdf_nbuf_set_tid() - set tid * @skb: Pointer to network buffer * * Return: none */ uint8_t __qdf_nbuf_get_exemption_type(struct sk_buff *skb) { return QDF_NBUF_EXEMPT_NO_EXEMPTION; } qdf_export_symbol(__qdf_nbuf_get_exemption_type); /** * __qdf_nbuf_reg_trace_cb() - register trace callback * @cb_func_ptr: Pointer to trace callback function * * Return: none */ void __qdf_nbuf_reg_trace_cb(qdf_nbuf_trace_update_t cb_func_ptr) { qdf_trace_update_cb = cb_func_ptr; } qdf_export_symbol(__qdf_nbuf_reg_trace_cb); /** * __qdf_nbuf_data_get_dhcp_subtype() - get the subtype * of DHCP packet. * @data: Pointer to DHCP packet data buffer * * This func. returns the subtype of DHCP packet. * * Return: subtype of the DHCP packet. */ enum qdf_proto_subtype __qdf_nbuf_data_get_dhcp_subtype(uint8_t *data) { enum qdf_proto_subtype subtype = QDF_PROTO_INVALID; if ((data[QDF_DHCP_OPTION53_OFFSET] == QDF_DHCP_OPTION53) && (data[QDF_DHCP_OPTION53_LENGTH_OFFSET] == QDF_DHCP_OPTION53_LENGTH)) { switch (data[QDF_DHCP_OPTION53_STATUS_OFFSET]) { case QDF_DHCP_DISCOVER: subtype = QDF_PROTO_DHCP_DISCOVER; break; case QDF_DHCP_REQUEST: subtype = QDF_PROTO_DHCP_REQUEST; break; case QDF_DHCP_OFFER: subtype = QDF_PROTO_DHCP_OFFER; break; case QDF_DHCP_ACK: subtype = QDF_PROTO_DHCP_ACK; break; case QDF_DHCP_NAK: subtype = QDF_PROTO_DHCP_NACK; break; case QDF_DHCP_RELEASE: subtype = QDF_PROTO_DHCP_RELEASE; break; case QDF_DHCP_INFORM: subtype = QDF_PROTO_DHCP_INFORM; break; case QDF_DHCP_DECLINE: subtype = QDF_PROTO_DHCP_DECLINE; break; default: break; } } return subtype; } /** * __qdf_nbuf_data_get_eapol_subtype() - get the subtype * of EAPOL packet. * @data: Pointer to EAPOL packet data buffer * * This func. returns the subtype of EAPOL packet. * * Return: subtype of the EAPOL packet. */ enum qdf_proto_subtype __qdf_nbuf_data_get_eapol_subtype(uint8_t *data) { uint16_t eapol_key_info; enum qdf_proto_subtype subtype = QDF_PROTO_INVALID; uint16_t mask; eapol_key_info = (uint16_t)(*(uint16_t *) (data + EAPOL_KEY_INFO_OFFSET)); mask = eapol_key_info & EAPOL_MASK; switch (mask) { case EAPOL_M1_BIT_MASK: subtype = QDF_PROTO_EAPOL_M1; break; case EAPOL_M2_BIT_MASK: subtype = QDF_PROTO_EAPOL_M2; break; case EAPOL_M3_BIT_MASK: subtype = QDF_PROTO_EAPOL_M3; break; case EAPOL_M4_BIT_MASK: subtype = QDF_PROTO_EAPOL_M4; break; default: break; } return subtype; } /** * __qdf_nbuf_data_get_arp_subtype() - get the subtype * of ARP packet. * @data: Pointer to ARP packet data buffer * * This func. returns the subtype of ARP packet. * * Return: subtype of the ARP packet. */ enum qdf_proto_subtype __qdf_nbuf_data_get_arp_subtype(uint8_t *data) { uint16_t subtype; enum qdf_proto_subtype proto_subtype = QDF_PROTO_INVALID; subtype = (uint16_t)(*(uint16_t *) (data + ARP_SUB_TYPE_OFFSET)); switch (QDF_SWAP_U16(subtype)) { case ARP_REQUEST: proto_subtype = QDF_PROTO_ARP_REQ; break; case ARP_RESPONSE: proto_subtype = QDF_PROTO_ARP_RES; break; default: break; } return proto_subtype; } /** * __qdf_nbuf_data_get_icmp_subtype() - get the subtype * of IPV4 ICMP packet. * @data: Pointer to IPV4 ICMP packet data buffer * * This func. returns the subtype of ICMP packet. * * Return: subtype of the ICMP packet. */ enum qdf_proto_subtype __qdf_nbuf_data_get_icmp_subtype(uint8_t *data) { uint8_t subtype; enum qdf_proto_subtype proto_subtype = QDF_PROTO_INVALID; subtype = (uint8_t)(*(uint8_t *) (data + ICMP_SUBTYPE_OFFSET)); switch (subtype) { case ICMP_REQUEST: proto_subtype = QDF_PROTO_ICMP_REQ; break; case ICMP_RESPONSE: proto_subtype = QDF_PROTO_ICMP_RES; break; default: break; } return proto_subtype; } /** * __qdf_nbuf_data_get_icmpv6_subtype() - get the subtype * of IPV6 ICMPV6 packet. * @data: Pointer to IPV6 ICMPV6 packet data buffer * * This func. returns the subtype of ICMPV6 packet. * * Return: subtype of the ICMPV6 packet. */ enum qdf_proto_subtype __qdf_nbuf_data_get_icmpv6_subtype(uint8_t *data) { uint8_t subtype; enum qdf_proto_subtype proto_subtype = QDF_PROTO_INVALID; subtype = (uint8_t)(*(uint8_t *) (data + ICMPV6_SUBTYPE_OFFSET)); switch (subtype) { case ICMPV6_REQUEST: proto_subtype = QDF_PROTO_ICMPV6_REQ; break; case ICMPV6_RESPONSE: proto_subtype = QDF_PROTO_ICMPV6_RES; break; case ICMPV6_RS: proto_subtype = QDF_PROTO_ICMPV6_RS; break; case ICMPV6_RA: proto_subtype = QDF_PROTO_ICMPV6_RA; break; case ICMPV6_NS: proto_subtype = QDF_PROTO_ICMPV6_NS; break; case ICMPV6_NA: proto_subtype = QDF_PROTO_ICMPV6_NA; break; default: break; } return proto_subtype; } /** * __qdf_nbuf_data_get_ipv4_proto() - get the proto type * of IPV4 packet. * @data: Pointer to IPV4 packet data buffer * * This func. returns the proto type of IPV4 packet. * * Return: proto type of IPV4 packet. */ uint8_t __qdf_nbuf_data_get_ipv4_proto(uint8_t *data) { uint8_t proto_type; proto_type = (uint8_t)(*(uint8_t *)(data + QDF_NBUF_TRAC_IPV4_PROTO_TYPE_OFFSET)); return proto_type; } /** * __qdf_nbuf_data_get_ipv6_proto() - get the proto type * of IPV6 packet. * @data: Pointer to IPV6 packet data buffer * * This func. returns the proto type of IPV6 packet. * * Return: proto type of IPV6 packet. */ uint8_t __qdf_nbuf_data_get_ipv6_proto(uint8_t *data) { uint8_t proto_type; proto_type = (uint8_t)(*(uint8_t *)(data + QDF_NBUF_TRAC_IPV6_PROTO_TYPE_OFFSET)); return proto_type; } /** * __qdf_nbuf_data_is_ipv4_pkt() - check if packet is a ipv4 packet * @data: Pointer to network data * * This api is for Tx packets. * * Return: true if packet is ipv4 packet * false otherwise */ bool __qdf_nbuf_data_is_ipv4_pkt(uint8_t *data) { uint16_t ether_type; ether_type = (uint16_t)(*(uint16_t *)(data + QDF_NBUF_TRAC_ETH_TYPE_OFFSET)); if (ether_type == QDF_SWAP_U16(QDF_NBUF_TRAC_IPV4_ETH_TYPE)) return true; else return false; } qdf_export_symbol(__qdf_nbuf_data_is_ipv4_pkt); /** * __qdf_nbuf_data_is_ipv4_dhcp_pkt() - check if skb data is a dhcp packet * @data: Pointer to network data buffer * * This api is for ipv4 packet. * * Return: true if packet is DHCP packet * false otherwise */ bool __qdf_nbuf_data_is_ipv4_dhcp_pkt(uint8_t *data) { uint16_t sport; uint16_t dport; sport = (uint16_t)(*(uint16_t *)(data + QDF_NBUF_TRAC_IPV4_OFFSET + QDF_NBUF_TRAC_IPV4_HEADER_SIZE)); dport = (uint16_t)(*(uint16_t *)(data + QDF_NBUF_TRAC_IPV4_OFFSET + QDF_NBUF_TRAC_IPV4_HEADER_SIZE + sizeof(uint16_t))); if (((sport == QDF_SWAP_U16(QDF_NBUF_TRAC_DHCP_SRV_PORT)) && (dport == QDF_SWAP_U16(QDF_NBUF_TRAC_DHCP_CLI_PORT))) || ((sport == QDF_SWAP_U16(QDF_NBUF_TRAC_DHCP_CLI_PORT)) && (dport == QDF_SWAP_U16(QDF_NBUF_TRAC_DHCP_SRV_PORT)))) return true; else return false; } qdf_export_symbol(__qdf_nbuf_data_is_ipv4_dhcp_pkt); /** * __qdf_nbuf_data_is_ipv4_eapol_pkt() - check if skb data is a eapol packet * @data: Pointer to network data buffer * * This api is for ipv4 packet. * * Return: true if packet is EAPOL packet * false otherwise. */ bool __qdf_nbuf_data_is_ipv4_eapol_pkt(uint8_t *data) { uint16_t ether_type; ether_type = (uint16_t)(*(uint16_t *)(data + QDF_NBUF_TRAC_ETH_TYPE_OFFSET)); if (ether_type == QDF_SWAP_U16(QDF_NBUF_TRAC_EAPOL_ETH_TYPE)) return true; else return false; } qdf_export_symbol(__qdf_nbuf_data_is_ipv4_eapol_pkt); /** * __qdf_nbuf_is_ipv4_wapi_pkt() - check if skb data is a wapi packet * @skb: Pointer to network buffer * * This api is for ipv4 packet. * * Return: true if packet is WAPI packet * false otherwise. */ bool __qdf_nbuf_is_ipv4_wapi_pkt(struct sk_buff *skb) { uint16_t ether_type; ether_type = (uint16_t)(*(uint16_t *)(skb->data + QDF_NBUF_TRAC_ETH_TYPE_OFFSET)); if (ether_type == QDF_SWAP_U16(QDF_NBUF_TRAC_WAPI_ETH_TYPE)) return true; else return false; } qdf_export_symbol(__qdf_nbuf_is_ipv4_wapi_pkt); /** * __qdf_nbuf_is_ipv4_tdls_pkt() - check if skb data is a tdls packet * @skb: Pointer to network buffer * * This api is for ipv4 packet. * * Return: true if packet is tdls packet * false otherwise. */ bool __qdf_nbuf_is_ipv4_tdls_pkt(struct sk_buff *skb) { uint16_t ether_type; ether_type = *(uint16_t *)(skb->data + QDF_NBUF_TRAC_ETH_TYPE_OFFSET); if (ether_type == QDF_SWAP_U16(QDF_NBUF_TRAC_TDLS_ETH_TYPE)) return true; else return false; } qdf_export_symbol(__qdf_nbuf_is_ipv4_tdls_pkt); /** * __qdf_nbuf_data_is_ipv4_arp_pkt() - check if skb data is a arp packet * @data: Pointer to network data buffer * * This api is for ipv4 packet. * * Return: true if packet is ARP packet * false otherwise. */ bool __qdf_nbuf_data_is_ipv4_arp_pkt(uint8_t *data) { uint16_t ether_type; ether_type = (uint16_t)(*(uint16_t *)(data + QDF_NBUF_TRAC_ETH_TYPE_OFFSET)); if (ether_type == QDF_SWAP_U16(QDF_NBUF_TRAC_ARP_ETH_TYPE)) return true; else return false; } qdf_export_symbol(__qdf_nbuf_data_is_ipv4_arp_pkt); /** * __qdf_nbuf_data_is_arp_req() - check if skb data is a arp request * @data: Pointer to network data buffer * * This api is for ipv4 packet. * * Return: true if packet is ARP request * false otherwise. */ bool __qdf_nbuf_data_is_arp_req(uint8_t *data) { uint16_t op_code; op_code = (uint16_t)(*(uint16_t *)(data + QDF_NBUF_PKT_ARP_OPCODE_OFFSET)); if (op_code == QDF_SWAP_U16(QDF_NBUF_PKT_ARPOP_REQ)) return true; return false; } /** * __qdf_nbuf_data_is_arp_rsp() - check if skb data is a arp response * @data: Pointer to network data buffer * * This api is for ipv4 packet. * * Return: true if packet is ARP response * false otherwise. */ bool __qdf_nbuf_data_is_arp_rsp(uint8_t *data) { uint16_t op_code; op_code = (uint16_t)(*(uint16_t *)(data + QDF_NBUF_PKT_ARP_OPCODE_OFFSET)); if (op_code == QDF_SWAP_U16(QDF_NBUF_PKT_ARPOP_REPLY)) return true; return false; } /** * __qdf_nbuf_data_get_arp_src_ip() - get arp src IP * @data: Pointer to network data buffer * * This api is for ipv4 packet. * * Return: ARP packet source IP value. */ uint32_t __qdf_nbuf_get_arp_src_ip(uint8_t *data) { uint32_t src_ip; src_ip = (uint32_t)(*(uint32_t *)(data + QDF_NBUF_PKT_ARP_SRC_IP_OFFSET)); return src_ip; } /** * __qdf_nbuf_data_get_arp_tgt_ip() - get arp target IP * @data: Pointer to network data buffer * * This api is for ipv4 packet. * * Return: ARP packet target IP value. */ uint32_t __qdf_nbuf_get_arp_tgt_ip(uint8_t *data) { uint32_t tgt_ip; tgt_ip = (uint32_t)(*(uint32_t *)(data + QDF_NBUF_PKT_ARP_TGT_IP_OFFSET)); return tgt_ip; } /** * __qdf_nbuf_get_dns_domain_name() - get dns domain name * @data: Pointer to network data buffer * @len: length to copy * * This api is for dns domain name * * Return: dns domain name. */ uint8_t *__qdf_nbuf_get_dns_domain_name(uint8_t *data, uint32_t len) { uint8_t *domain_name; domain_name = (uint8_t *) (data + QDF_NBUF_PKT_DNS_NAME_OVER_UDP_OFFSET); return domain_name; } /** * __qdf_nbuf_data_is_dns_query() - check if skb data is a dns query * @data: Pointer to network data buffer * * This api is for dns query packet. * * Return: true if packet is dns query packet. * false otherwise. */ bool __qdf_nbuf_data_is_dns_query(uint8_t *data) { uint16_t op_code; uint16_t tgt_port; tgt_port = (uint16_t)(*(uint16_t *)(data + QDF_NBUF_PKT_DNS_DST_PORT_OFFSET)); /* Standard DNS query always happen on Dest Port 53. */ if (tgt_port == QDF_SWAP_U16(QDF_NBUF_PKT_DNS_STANDARD_PORT)) { op_code = (uint16_t)(*(uint16_t *)(data + QDF_NBUF_PKT_DNS_OVER_UDP_OPCODE_OFFSET)); if ((QDF_SWAP_U16(op_code) & QDF_NBUF_PKT_DNSOP_BITMAP) == QDF_NBUF_PKT_DNSOP_STANDARD_QUERY) return true; } return false; } /** * __qdf_nbuf_data_is_dns_response() - check if skb data is a dns response * @data: Pointer to network data buffer * * This api is for dns query response. * * Return: true if packet is dns response packet. * false otherwise. */ bool __qdf_nbuf_data_is_dns_response(uint8_t *data) { uint16_t op_code; uint16_t src_port; src_port = (uint16_t)(*(uint16_t *)(data + QDF_NBUF_PKT_DNS_SRC_PORT_OFFSET)); /* Standard DNS response always comes on Src Port 53. */ if (src_port == QDF_SWAP_U16(QDF_NBUF_PKT_DNS_STANDARD_PORT)) { op_code = (uint16_t)(*(uint16_t *)(data + QDF_NBUF_PKT_DNS_OVER_UDP_OPCODE_OFFSET)); if ((QDF_SWAP_U16(op_code) & QDF_NBUF_PKT_DNSOP_BITMAP) == QDF_NBUF_PKT_DNSOP_STANDARD_RESPONSE) return true; } return false; } /** * __qdf_nbuf_data_is_tcp_syn() - check if skb data is a tcp syn * @data: Pointer to network data buffer * * This api is for tcp syn packet. * * Return: true if packet is tcp syn packet. * false otherwise. */ bool __qdf_nbuf_data_is_tcp_syn(uint8_t *data) { uint8_t op_code; op_code = (uint8_t)(*(uint8_t *)(data + QDF_NBUF_PKT_TCP_OPCODE_OFFSET)); if (op_code == QDF_NBUF_PKT_TCPOP_SYN) return true; return false; } /** * __qdf_nbuf_data_is_tcp_syn_ack() - check if skb data is a tcp syn ack * @data: Pointer to network data buffer * * This api is for tcp syn ack packet. * * Return: true if packet is tcp syn ack packet. * false otherwise. */ bool __qdf_nbuf_data_is_tcp_syn_ack(uint8_t *data) { uint8_t op_code; op_code = (uint8_t)(*(uint8_t *)(data + QDF_NBUF_PKT_TCP_OPCODE_OFFSET)); if (op_code == QDF_NBUF_PKT_TCPOP_SYN_ACK) return true; return false; } /** * __qdf_nbuf_data_is_tcp_ack() - check if skb data is a tcp ack * @data: Pointer to network data buffer * * This api is for tcp ack packet. * * Return: true if packet is tcp ack packet. * false otherwise. */ bool __qdf_nbuf_data_is_tcp_ack(uint8_t *data) { uint8_t op_code; op_code = (uint8_t)(*(uint8_t *)(data + QDF_NBUF_PKT_TCP_OPCODE_OFFSET)); if (op_code == QDF_NBUF_PKT_TCPOP_ACK) return true; return false; } /** * __qdf_nbuf_data_get_tcp_src_port() - get tcp src port * @data: Pointer to network data buffer * * This api is for tcp packet. * * Return: tcp source port value. */ uint16_t __qdf_nbuf_data_get_tcp_src_port(uint8_t *data) { uint16_t src_port; src_port = (uint16_t)(*(uint16_t *)(data + QDF_NBUF_PKT_TCP_SRC_PORT_OFFSET)); return src_port; } /** * __qdf_nbuf_data_get_tcp_dst_port() - get tcp dst port * @data: Pointer to network data buffer * * This api is for tcp packet. * * Return: tcp destination port value. */ uint16_t __qdf_nbuf_data_get_tcp_dst_port(uint8_t *data) { uint16_t tgt_port; tgt_port = (uint16_t)(*(uint16_t *)(data + QDF_NBUF_PKT_TCP_DST_PORT_OFFSET)); return tgt_port; } /** * __qdf_nbuf_data_is_icmpv4_req() - check if skb data is a icmpv4 request * @data: Pointer to network data buffer * * This api is for ipv4 req packet. * * Return: true if packet is icmpv4 request * false otherwise. */ bool __qdf_nbuf_data_is_icmpv4_req(uint8_t *data) { uint8_t op_code; op_code = (uint8_t)(*(uint8_t *)(data + QDF_NBUF_PKT_ICMPv4_OPCODE_OFFSET)); if (op_code == QDF_NBUF_PKT_ICMPv4OP_REQ) return true; return false; } /** * __qdf_nbuf_data_is_icmpv4_rsp() - check if skb data is a icmpv4 res * @data: Pointer to network data buffer * * This api is for ipv4 res packet. * * Return: true if packet is icmpv4 response * false otherwise. */ bool __qdf_nbuf_data_is_icmpv4_rsp(uint8_t *data) { uint8_t op_code; op_code = (uint8_t)(*(uint8_t *)(data + QDF_NBUF_PKT_ICMPv4_OPCODE_OFFSET)); if (op_code == QDF_NBUF_PKT_ICMPv4OP_REPLY) return true; return false; } /** * __qdf_nbuf_data_get_icmpv4_src_ip() - get icmpv4 src IP * @data: Pointer to network data buffer * * This api is for ipv4 packet. * * Return: icmpv4 packet source IP value. */ uint32_t __qdf_nbuf_get_icmpv4_src_ip(uint8_t *data) { uint32_t src_ip; src_ip = (uint32_t)(*(uint32_t *)(data + QDF_NBUF_PKT_ICMPv4_SRC_IP_OFFSET)); return src_ip; } /** * __qdf_nbuf_data_get_icmpv4_tgt_ip() - get icmpv4 target IP * @data: Pointer to network data buffer * * This api is for ipv4 packet. * * Return: icmpv4 packet target IP value. */ uint32_t __qdf_nbuf_get_icmpv4_tgt_ip(uint8_t *data) { uint32_t tgt_ip; tgt_ip = (uint32_t)(*(uint32_t *)(data + QDF_NBUF_PKT_ICMPv4_TGT_IP_OFFSET)); return tgt_ip; } /** * __qdf_nbuf_data_is_ipv6_pkt() - check if it is IPV6 packet. * @data: Pointer to IPV6 packet data buffer * * This func. checks whether it is a IPV6 packet or not. * * Return: TRUE if it is a IPV6 packet * FALSE if not */ bool __qdf_nbuf_data_is_ipv6_pkt(uint8_t *data) { uint16_t ether_type; ether_type = (uint16_t)(*(uint16_t *)(data + QDF_NBUF_TRAC_ETH_TYPE_OFFSET)); if (ether_type == QDF_SWAP_U16(QDF_NBUF_TRAC_IPV6_ETH_TYPE)) return true; else return false; } qdf_export_symbol(__qdf_nbuf_data_is_ipv6_pkt); /** * __qdf_nbuf_data_is_ipv6_dhcp_pkt() - check if skb data is a dhcp packet * @data: Pointer to network data buffer * * This api is for ipv6 packet. * * Return: true if packet is DHCP packet * false otherwise */ bool __qdf_nbuf_data_is_ipv6_dhcp_pkt(uint8_t *data) { uint16_t sport; uint16_t dport; sport = *(uint16_t *)(data + QDF_NBUF_TRAC_IPV6_OFFSET + QDF_NBUF_TRAC_IPV6_HEADER_SIZE); dport = *(uint16_t *)(data + QDF_NBUF_TRAC_IPV6_OFFSET + QDF_NBUF_TRAC_IPV6_HEADER_SIZE + sizeof(uint16_t)); if (((sport == QDF_SWAP_U16(QDF_NBUF_TRAC_DHCP6_SRV_PORT)) && (dport == QDF_SWAP_U16(QDF_NBUF_TRAC_DHCP6_CLI_PORT))) || ((sport == QDF_SWAP_U16(QDF_NBUF_TRAC_DHCP6_CLI_PORT)) && (dport == QDF_SWAP_U16(QDF_NBUF_TRAC_DHCP6_SRV_PORT)))) return true; else return false; } qdf_export_symbol(__qdf_nbuf_data_is_ipv6_dhcp_pkt); /** * __qdf_nbuf_data_is_ipv4_mcast_pkt() - check if it is IPV4 multicast packet. * @data: Pointer to IPV4 packet data buffer * * This func. checks whether it is a IPV4 multicast packet or not. * * Return: TRUE if it is a IPV4 multicast packet * FALSE if not */ bool __qdf_nbuf_data_is_ipv4_mcast_pkt(uint8_t *data) { if (__qdf_nbuf_data_is_ipv4_pkt(data)) { uint32_t *dst_addr = (uint32_t *)(data + QDF_NBUF_TRAC_IPV4_DEST_ADDR_OFFSET); /* * Check first word of the IPV4 address and if it is * equal to 0xE then it represents multicast IP. */ if ((*dst_addr & QDF_NBUF_TRAC_IPV4_ADDR_BCAST_MASK) == QDF_NBUF_TRAC_IPV4_ADDR_MCAST_MASK) return true; else return false; } else return false; } /** * __qdf_nbuf_data_is_ipv6_mcast_pkt() - check if it is IPV6 multicast packet. * @data: Pointer to IPV6 packet data buffer * * This func. checks whether it is a IPV6 multicast packet or not. * * Return: TRUE if it is a IPV6 multicast packet * FALSE if not */ bool __qdf_nbuf_data_is_ipv6_mcast_pkt(uint8_t *data) { if (__qdf_nbuf_data_is_ipv6_pkt(data)) { uint16_t *dst_addr; dst_addr = (uint16_t *) (data + QDF_NBUF_TRAC_IPV6_DEST_ADDR_OFFSET); /* * Check first byte of the IP address and if it * 0xFF00 then it is a IPV6 mcast packet. */ if (*dst_addr == QDF_SWAP_U16(QDF_NBUF_TRAC_IPV6_DEST_ADDR)) return true; else return false; } else return false; } /** * __qdf_nbuf_data_is_icmp_pkt() - check if it is IPV4 ICMP packet. * @data: Pointer to IPV4 ICMP packet data buffer * * This func. checks whether it is a ICMP packet or not. * * Return: TRUE if it is a ICMP packet * FALSE if not */ bool __qdf_nbuf_data_is_icmp_pkt(uint8_t *data) { if (__qdf_nbuf_data_is_ipv4_pkt(data)) { uint8_t pkt_type; pkt_type = (uint8_t)(*(uint8_t *)(data + QDF_NBUF_TRAC_IPV4_PROTO_TYPE_OFFSET)); if (pkt_type == QDF_NBUF_TRAC_ICMP_TYPE) return true; else return false; } else return false; } /** * __qdf_nbuf_data_is_icmpv6_pkt() - check if it is IPV6 ICMPV6 packet. * @data: Pointer to IPV6 ICMPV6 packet data buffer * * This func. checks whether it is a ICMPV6 packet or not. * * Return: TRUE if it is a ICMPV6 packet * FALSE if not */ bool __qdf_nbuf_data_is_icmpv6_pkt(uint8_t *data) { if (__qdf_nbuf_data_is_ipv6_pkt(data)) { uint8_t pkt_type; pkt_type = (uint8_t)(*(uint8_t *)(data + QDF_NBUF_TRAC_IPV6_PROTO_TYPE_OFFSET)); if (pkt_type == QDF_NBUF_TRAC_ICMPV6_TYPE) return true; else return false; } else return false; } /** * __qdf_nbuf_data_is_ipv4_udp_pkt() - check if it is IPV4 UDP packet. * @data: Pointer to IPV4 UDP packet data buffer * * This func. checks whether it is a IPV4 UDP packet or not. * * Return: TRUE if it is a IPV4 UDP packet * FALSE if not */ bool __qdf_nbuf_data_is_ipv4_udp_pkt(uint8_t *data) { if (__qdf_nbuf_data_is_ipv4_pkt(data)) { uint8_t pkt_type; pkt_type = (uint8_t)(*(uint8_t *)(data + QDF_NBUF_TRAC_IPV4_PROTO_TYPE_OFFSET)); if (pkt_type == QDF_NBUF_TRAC_UDP_TYPE) return true; else return false; } else return false; } /** * __qdf_nbuf_data_is_ipv4_tcp_pkt() - check if it is IPV4 TCP packet. * @data: Pointer to IPV4 TCP packet data buffer * * This func. checks whether it is a IPV4 TCP packet or not. * * Return: TRUE if it is a IPV4 TCP packet * FALSE if not */ bool __qdf_nbuf_data_is_ipv4_tcp_pkt(uint8_t *data) { if (__qdf_nbuf_data_is_ipv4_pkt(data)) { uint8_t pkt_type; pkt_type = (uint8_t)(*(uint8_t *)(data + QDF_NBUF_TRAC_IPV4_PROTO_TYPE_OFFSET)); if (pkt_type == QDF_NBUF_TRAC_TCP_TYPE) return true; else return false; } else return false; } /** * __qdf_nbuf_data_is_ipv6_udp_pkt() - check if it is IPV6 UDP packet. * @data: Pointer to IPV6 UDP packet data buffer * * This func. checks whether it is a IPV6 UDP packet or not. * * Return: TRUE if it is a IPV6 UDP packet * FALSE if not */ bool __qdf_nbuf_data_is_ipv6_udp_pkt(uint8_t *data) { if (__qdf_nbuf_data_is_ipv6_pkt(data)) { uint8_t pkt_type; pkt_type = (uint8_t)(*(uint8_t *)(data + QDF_NBUF_TRAC_IPV6_PROTO_TYPE_OFFSET)); if (pkt_type == QDF_NBUF_TRAC_UDP_TYPE) return true; else return false; } else return false; } /** * __qdf_nbuf_data_is_ipv6_tcp_pkt() - check if it is IPV6 TCP packet. * @data: Pointer to IPV6 TCP packet data buffer * * This func. checks whether it is a IPV6 TCP packet or not. * * Return: TRUE if it is a IPV6 TCP packet * FALSE if not */ bool __qdf_nbuf_data_is_ipv6_tcp_pkt(uint8_t *data) { if (__qdf_nbuf_data_is_ipv6_pkt(data)) { uint8_t pkt_type; pkt_type = (uint8_t)(*(uint8_t *)(data + QDF_NBUF_TRAC_IPV6_PROTO_TYPE_OFFSET)); if (pkt_type == QDF_NBUF_TRAC_TCP_TYPE) return true; else return false; } else return false; } /** * __qdf_nbuf_is_bcast_pkt() - is destination address broadcast * @nbuf - sk buff * * Return: true if packet is broadcast * false otherwise */ bool __qdf_nbuf_is_bcast_pkt(qdf_nbuf_t nbuf) { struct ethhdr *eh = (struct ethhdr *)qdf_nbuf_data(nbuf); return qdf_is_macaddr_broadcast((struct qdf_mac_addr *)eh->h_dest); } qdf_export_symbol(__qdf_nbuf_is_bcast_pkt); #ifdef NBUF_MEMORY_DEBUG #define QDF_NET_BUF_TRACK_MAX_SIZE (1024) /** * struct qdf_nbuf_track_t - Network buffer track structure * * @p_next: Pointer to next * @net_buf: Pointer to network buffer * @func_name: Function name * @line_num: Line number * @size: Size */ struct qdf_nbuf_track_t { struct qdf_nbuf_track_t *p_next; qdf_nbuf_t net_buf; char func_name[QDF_MEM_FUNC_NAME_SIZE]; uint32_t line_num; size_t size; }; static spinlock_t g_qdf_net_buf_track_lock[QDF_NET_BUF_TRACK_MAX_SIZE]; typedef struct qdf_nbuf_track_t QDF_NBUF_TRACK; static QDF_NBUF_TRACK *gp_qdf_net_buf_track_tbl[QDF_NET_BUF_TRACK_MAX_SIZE]; static struct kmem_cache *nbuf_tracking_cache; static QDF_NBUF_TRACK *qdf_net_buf_track_free_list; static spinlock_t qdf_net_buf_track_free_list_lock; static uint32_t qdf_net_buf_track_free_list_count; static uint32_t qdf_net_buf_track_used_list_count; static uint32_t qdf_net_buf_track_max_used; static uint32_t qdf_net_buf_track_max_free; static uint32_t qdf_net_buf_track_max_allocated; /** * update_max_used() - update qdf_net_buf_track_max_used tracking variable * * tracks the max number of network buffers that the wlan driver was tracking * at any one time. * * Return: none */ static inline void update_max_used(void) { int sum; if (qdf_net_buf_track_max_used < qdf_net_buf_track_used_list_count) qdf_net_buf_track_max_used = qdf_net_buf_track_used_list_count; sum = qdf_net_buf_track_free_list_count + qdf_net_buf_track_used_list_count; if (qdf_net_buf_track_max_allocated < sum) qdf_net_buf_track_max_allocated = sum; } /** * update_max_free() - update qdf_net_buf_track_free_list_count * * tracks the max number tracking buffers kept in the freelist. * * Return: none */ static inline void update_max_free(void) { if (qdf_net_buf_track_max_free < qdf_net_buf_track_free_list_count) qdf_net_buf_track_max_free = qdf_net_buf_track_free_list_count; } /** * qdf_nbuf_track_alloc() - allocate a cookie to track nbufs allocated by wlan * * This function pulls from a freelist if possible and uses kmem_cache_alloc. * This function also ads fexibility to adjust the allocation and freelist * scheems. * * Return: a pointer to an unused QDF_NBUF_TRACK structure may not be zeroed. */ static QDF_NBUF_TRACK *qdf_nbuf_track_alloc(void) { int flags = GFP_KERNEL; unsigned long irq_flag; QDF_NBUF_TRACK *new_node = NULL; spin_lock_irqsave(&qdf_net_buf_track_free_list_lock, irq_flag); qdf_net_buf_track_used_list_count++; if (qdf_net_buf_track_free_list != NULL) { new_node = qdf_net_buf_track_free_list; qdf_net_buf_track_free_list = qdf_net_buf_track_free_list->p_next; qdf_net_buf_track_free_list_count--; } update_max_used(); spin_unlock_irqrestore(&qdf_net_buf_track_free_list_lock, irq_flag); if (new_node != NULL) return new_node; if (in_interrupt() || irqs_disabled() || in_atomic()) flags = GFP_ATOMIC; return kmem_cache_alloc(nbuf_tracking_cache, flags); } /* FREEQ_POOLSIZE initial and minimum desired freelist poolsize */ #define FREEQ_POOLSIZE 2048 /** * qdf_nbuf_track_free() - free the nbuf tracking cookie. * * Matches calls to qdf_nbuf_track_alloc. * Either frees the tracking cookie to kernel or an internal * freelist based on the size of the freelist. * * Return: none */ static void qdf_nbuf_track_free(QDF_NBUF_TRACK *node) { unsigned long irq_flag; if (!node) return; /* Try to shrink the freelist if free_list_count > than FREEQ_POOLSIZE * only shrink the freelist if it is bigger than twice the number of * nbufs in use. If the driver is stalling in a consistent bursty * fasion, this will keep 3/4 of thee allocations from the free list * while also allowing the system to recover memory as less frantic * traffic occurs. */ spin_lock_irqsave(&qdf_net_buf_track_free_list_lock, irq_flag); qdf_net_buf_track_used_list_count--; if (qdf_net_buf_track_free_list_count > FREEQ_POOLSIZE && (qdf_net_buf_track_free_list_count > qdf_net_buf_track_used_list_count << 1)) { kmem_cache_free(nbuf_tracking_cache, node); } else { node->p_next = qdf_net_buf_track_free_list; qdf_net_buf_track_free_list = node; qdf_net_buf_track_free_list_count++; } update_max_free(); spin_unlock_irqrestore(&qdf_net_buf_track_free_list_lock, irq_flag); } /** * qdf_nbuf_track_prefill() - prefill the nbuf tracking cookie freelist * * Removes a 'warmup time' characteristic of the freelist. Prefilling * the freelist first makes it performant for the first iperf udp burst * as well as steady state. * * Return: None */ static void qdf_nbuf_track_prefill(void) { int i; QDF_NBUF_TRACK *node, *head; /* prepopulate the freelist */ head = NULL; for (i = 0; i < FREEQ_POOLSIZE; i++) { node = qdf_nbuf_track_alloc(); if (node == NULL) continue; node->p_next = head; head = node; } while (head) { node = head->p_next; qdf_nbuf_track_free(head); head = node; } /* prefilled buffers should not count as used */ qdf_net_buf_track_max_used = 0; } /** * qdf_nbuf_track_memory_manager_create() - manager for nbuf tracking cookies * * This initializes the memory manager for the nbuf tracking cookies. Because * these cookies are all the same size and only used in this feature, we can * use a kmem_cache to provide tracking as well as to speed up allocations. * To avoid the overhead of allocating and freeing the buffers (including SLUB * features) a freelist is prepopulated here. * * Return: None */ static void qdf_nbuf_track_memory_manager_create(void) { spin_lock_init(&qdf_net_buf_track_free_list_lock); nbuf_tracking_cache = kmem_cache_create("qdf_nbuf_tracking_cache", sizeof(QDF_NBUF_TRACK), 0, 0, NULL); qdf_nbuf_track_prefill(); } /** * qdf_nbuf_track_memory_manager_destroy() - manager for nbuf tracking cookies * * Empty the freelist and print out usage statistics when it is no longer * needed. Also the kmem_cache should be destroyed here so that it can warn if * any nbuf tracking cookies were leaked. * * Return: None */ static void qdf_nbuf_track_memory_manager_destroy(void) { QDF_NBUF_TRACK *node, *tmp; unsigned long irq_flag; spin_lock_irqsave(&qdf_net_buf_track_free_list_lock, irq_flag); node = qdf_net_buf_track_free_list; if (qdf_net_buf_track_max_used > FREEQ_POOLSIZE * 4) qdf_print("%s: unexpectedly large max_used count %d", __func__, qdf_net_buf_track_max_used); if (qdf_net_buf_track_max_used < qdf_net_buf_track_max_allocated) qdf_print("%s: %d unused trackers were allocated", __func__, qdf_net_buf_track_max_allocated - qdf_net_buf_track_max_used); if (qdf_net_buf_track_free_list_count > FREEQ_POOLSIZE && qdf_net_buf_track_free_list_count > 3*qdf_net_buf_track_max_used/4) qdf_print("%s: check freelist shrinking functionality", __func__); QDF_TRACE(QDF_MODULE_ID_QDF, QDF_TRACE_LEVEL_INFO, "%s: %d residual freelist size", __func__, qdf_net_buf_track_free_list_count); QDF_TRACE(QDF_MODULE_ID_QDF, QDF_TRACE_LEVEL_INFO, "%s: %d max freelist size observed", __func__, qdf_net_buf_track_max_free); QDF_TRACE(QDF_MODULE_ID_QDF, QDF_TRACE_LEVEL_INFO, "%s: %d max buffers used observed", __func__, qdf_net_buf_track_max_used); QDF_TRACE(QDF_MODULE_ID_QDF, QDF_TRACE_LEVEL_INFO, "%s: %d max buffers allocated observed", __func__, qdf_net_buf_track_max_allocated); while (node) { tmp = node; node = node->p_next; kmem_cache_free(nbuf_tracking_cache, tmp); qdf_net_buf_track_free_list_count--; } if (qdf_net_buf_track_free_list_count != 0) qdf_info("%d unfreed tracking memory lost in freelist", qdf_net_buf_track_free_list_count); if (qdf_net_buf_track_used_list_count != 0) qdf_info("%d unfreed tracking memory still in use", qdf_net_buf_track_used_list_count); spin_unlock_irqrestore(&qdf_net_buf_track_free_list_lock, irq_flag); kmem_cache_destroy(nbuf_tracking_cache); qdf_net_buf_track_free_list = NULL; } /** * qdf_net_buf_debug_init() - initialize network buffer debug functionality * * QDF network buffer debug feature tracks all SKBs allocated by WLAN driver * in a hash table and when driver is unloaded it reports about leaked SKBs. * WLAN driver module whose allocated SKB is freed by network stack are * suppose to call qdf_net_buf_debug_release_skb() such that the SKB is not * reported as memory leak. * * Return: none */ void qdf_net_buf_debug_init(void) { uint32_t i; qdf_atomic_set(&qdf_nbuf_history_index, -1); qdf_nbuf_map_tracking_init(); qdf_nbuf_track_memory_manager_create(); for (i = 0; i < QDF_NET_BUF_TRACK_MAX_SIZE; i++) { gp_qdf_net_buf_track_tbl[i] = NULL; spin_lock_init(&g_qdf_net_buf_track_lock[i]); } } qdf_export_symbol(qdf_net_buf_debug_init); /** * qdf_net_buf_debug_init() - exit network buffer debug functionality * * Exit network buffer tracking debug functionality and log SKB memory leaks * As part of exiting the functionality, free the leaked memory and * cleanup the tracking buffers. * * Return: none */ void qdf_net_buf_debug_exit(void) { uint32_t i; uint32_t count = 0; unsigned long irq_flag; QDF_NBUF_TRACK *p_node; QDF_NBUF_TRACK *p_prev; for (i = 0; i < QDF_NET_BUF_TRACK_MAX_SIZE; i++) { spin_lock_irqsave(&g_qdf_net_buf_track_lock[i], irq_flag); p_node = gp_qdf_net_buf_track_tbl[i]; while (p_node) { p_prev = p_node; p_node = p_node->p_next; count++; qdf_info("SKB buf memory Leak@ Func %s, @Line %d, size %zu, nbuf %pK", p_prev->func_name, p_prev->line_num, p_prev->size, p_prev->net_buf); qdf_nbuf_track_free(p_prev); } spin_unlock_irqrestore(&g_qdf_net_buf_track_lock[i], irq_flag); } qdf_nbuf_track_memory_manager_destroy(); qdf_nbuf_map_tracking_deinit(); #ifdef CONFIG_HALT_KMEMLEAK if (count) { qdf_err("%d SKBs leaked .. please fix the SKB leak", count); QDF_BUG(0); } #endif } qdf_export_symbol(qdf_net_buf_debug_exit); /** * qdf_net_buf_debug_hash() - hash network buffer pointer * * Return: hash value */ static uint32_t qdf_net_buf_debug_hash(qdf_nbuf_t net_buf) { uint32_t i; i = (uint32_t) (((uintptr_t) net_buf) >> 4); i += (uint32_t) (((uintptr_t) net_buf) >> 14); i &= (QDF_NET_BUF_TRACK_MAX_SIZE - 1); return i; } /** * qdf_net_buf_debug_look_up() - look up network buffer in debug hash table * * Return: If skb is found in hash table then return pointer to network buffer * else return %NULL */ static QDF_NBUF_TRACK *qdf_net_buf_debug_look_up(qdf_nbuf_t net_buf) { uint32_t i; QDF_NBUF_TRACK *p_node; i = qdf_net_buf_debug_hash(net_buf); p_node = gp_qdf_net_buf_track_tbl[i]; while (p_node) { if (p_node->net_buf == net_buf) return p_node; p_node = p_node->p_next; } return NULL; } /** * qdf_net_buf_debug_add_node() - store skb in debug hash table * * Return: none */ void qdf_net_buf_debug_add_node(qdf_nbuf_t net_buf, size_t size, const char *func_name, uint32_t line_num) { uint32_t i; unsigned long irq_flag; QDF_NBUF_TRACK *p_node; QDF_NBUF_TRACK *new_node; new_node = qdf_nbuf_track_alloc(); i = qdf_net_buf_debug_hash(net_buf); spin_lock_irqsave(&g_qdf_net_buf_track_lock[i], irq_flag); p_node = qdf_net_buf_debug_look_up(net_buf); if (p_node) { qdf_print("Double allocation of skb ! Already allocated from %pK %s %d current alloc from %pK %s %d", p_node->net_buf, p_node->func_name, p_node->line_num, net_buf, func_name, line_num); qdf_nbuf_track_free(new_node); } else { p_node = new_node; if (p_node) { p_node->net_buf = net_buf; qdf_str_lcopy(p_node->func_name, func_name, QDF_MEM_FUNC_NAME_SIZE); p_node->line_num = line_num; p_node->size = size; qdf_mem_skb_inc(size); p_node->p_next = gp_qdf_net_buf_track_tbl[i]; gp_qdf_net_buf_track_tbl[i] = p_node; } else qdf_print( "Mem alloc failed ! Could not track skb from %s %d of size %zu", func_name, line_num, size); } spin_unlock_irqrestore(&g_qdf_net_buf_track_lock[i], irq_flag); } qdf_export_symbol(qdf_net_buf_debug_add_node); void qdf_net_buf_debug_update_node(qdf_nbuf_t net_buf, const char *func_name, uint32_t line_num) { uint32_t i; unsigned long irq_flag; QDF_NBUF_TRACK *p_node; i = qdf_net_buf_debug_hash(net_buf); spin_lock_irqsave(&g_qdf_net_buf_track_lock[i], irq_flag); p_node = qdf_net_buf_debug_look_up(net_buf); if (p_node) { qdf_str_lcopy(p_node->func_name, kbasename(func_name), QDF_MEM_FUNC_NAME_SIZE); p_node->line_num = line_num; } spin_unlock_irqrestore(&g_qdf_net_buf_track_lock[i], irq_flag); } qdf_export_symbol(qdf_net_buf_debug_update_node); /** * qdf_net_buf_debug_delete_node() - remove skb from debug hash table * * Return: none */ void qdf_net_buf_debug_delete_node(qdf_nbuf_t net_buf) { uint32_t i; QDF_NBUF_TRACK *p_head; QDF_NBUF_TRACK *p_node = NULL; unsigned long irq_flag; QDF_NBUF_TRACK *p_prev; i = qdf_net_buf_debug_hash(net_buf); spin_lock_irqsave(&g_qdf_net_buf_track_lock[i], irq_flag); p_head = gp_qdf_net_buf_track_tbl[i]; /* Unallocated SKB */ if (!p_head) goto done; p_node = p_head; /* Found at head of the table */ if (p_head->net_buf == net_buf) { gp_qdf_net_buf_track_tbl[i] = p_node->p_next; goto done; } /* Search in collision list */ while (p_node) { p_prev = p_node; p_node = p_node->p_next; if ((NULL != p_node) && (p_node->net_buf == net_buf)) { p_prev->p_next = p_node->p_next; break; } } done: spin_unlock_irqrestore(&g_qdf_net_buf_track_lock[i], irq_flag); if (p_node) { qdf_mem_skb_dec(p_node->size); qdf_nbuf_track_free(p_node); } else { qdf_print("Unallocated buffer ! Double free of net_buf %pK ?", net_buf); QDF_BUG(0); } } qdf_export_symbol(qdf_net_buf_debug_delete_node); void qdf_net_buf_debug_acquire_skb(qdf_nbuf_t net_buf, const char *func_name, uint32_t line_num) { qdf_nbuf_t ext_list = qdf_nbuf_get_ext_list(net_buf); while (ext_list) { /* * Take care to add if it is Jumbo packet connected using * frag_list */ qdf_nbuf_t next; next = qdf_nbuf_queue_next(ext_list); qdf_net_buf_debug_add_node(ext_list, 0, func_name, line_num); ext_list = next; } qdf_net_buf_debug_add_node(net_buf, 0, func_name, line_num); } qdf_export_symbol(qdf_net_buf_debug_acquire_skb); /** * qdf_net_buf_debug_release_skb() - release skb to avoid memory leak * @net_buf: Network buf holding head segment (single) * * WLAN driver module whose allocated SKB is freed by network stack are * suppose to call this API before returning SKB to network stack such * that the SKB is not reported as memory leak. * * Return: none */ void qdf_net_buf_debug_release_skb(qdf_nbuf_t net_buf) { qdf_nbuf_t ext_list = qdf_nbuf_get_ext_list(net_buf); while (ext_list) { /* * Take care to free if it is Jumbo packet connected using * frag_list */ qdf_nbuf_t next; next = qdf_nbuf_queue_next(ext_list); if (qdf_nbuf_get_users(ext_list) > 1) { ext_list = next; continue; } qdf_net_buf_debug_delete_node(ext_list); ext_list = next; } if (qdf_nbuf_get_users(net_buf) > 1) return; qdf_net_buf_debug_delete_node(net_buf); } qdf_export_symbol(qdf_net_buf_debug_release_skb); qdf_nbuf_t qdf_nbuf_alloc_debug(qdf_device_t osdev, qdf_size_t size, int reserve, int align, int prio, const char *func, uint32_t line) { qdf_nbuf_t nbuf; nbuf = __qdf_nbuf_alloc(osdev, size, reserve, align, prio, func, line); /* Store SKB in internal QDF tracking table */ if (qdf_likely(nbuf)) { qdf_net_buf_debug_add_node(nbuf, size, func, line); qdf_nbuf_history_add(nbuf, func, line, QDF_NBUF_ALLOC); } else { qdf_nbuf_history_add(nbuf, func, line, QDF_NBUF_ALLOC_FAILURE); } return nbuf; } qdf_export_symbol(qdf_nbuf_alloc_debug); void qdf_nbuf_free_debug(qdf_nbuf_t nbuf, const char *func, uint32_t line) { if (qdf_unlikely(!nbuf)) return; if (qdf_nbuf_get_users(nbuf) > 1) goto free_buf; /* Remove SKB from internal QDF tracking table */ qdf_nbuf_panic_on_free_if_mapped(nbuf, func, line); qdf_net_buf_debug_delete_node(nbuf); qdf_nbuf_history_add(nbuf, func, line, QDF_NBUF_FREE); free_buf: __qdf_nbuf_free(nbuf); } qdf_export_symbol(qdf_nbuf_free_debug); qdf_nbuf_t qdf_nbuf_clone_debug(qdf_nbuf_t buf, const char *func, uint32_t line) { qdf_nbuf_t cloned_buf = __qdf_nbuf_clone(buf); if (qdf_unlikely(!cloned_buf)) return NULL; /* Store SKB in internal QDF tracking table */ qdf_net_buf_debug_add_node(cloned_buf, 0, func, line); qdf_nbuf_history_add(cloned_buf, func, line, QDF_NBUF_ALLOC_CLONE); return cloned_buf; } qdf_export_symbol(qdf_nbuf_clone_debug); qdf_nbuf_t qdf_nbuf_copy_debug(qdf_nbuf_t buf, const char *func, uint32_t line) { qdf_nbuf_t copied_buf = __qdf_nbuf_copy(buf); if (qdf_unlikely(!copied_buf)) return NULL; /* Store SKB in internal QDF tracking table */ qdf_net_buf_debug_add_node(copied_buf, 0, func, line); qdf_nbuf_history_add(copied_buf, func, line, QDF_NBUF_ALLOC_COPY); return copied_buf; } qdf_export_symbol(qdf_nbuf_copy_debug); #endif /* NBUF_MEMORY_DEBUG */ #if defined(FEATURE_TSO) /** * struct qdf_tso_cmn_seg_info_t - TSO common info structure * * @ethproto: ethernet type of the msdu * @ip_tcp_hdr_len: ip + tcp length for the msdu * @l2_len: L2 length for the msdu * @eit_hdr: pointer to EIT header * @eit_hdr_len: EIT header length for the msdu * @eit_hdr_dma_map_addr: dma addr for EIT header * @tcphdr: pointer to tcp header * @ipv4_csum_en: ipv4 checksum enable * @tcp_ipv4_csum_en: TCP ipv4 checksum enable * @tcp_ipv6_csum_en: TCP ipv6 checksum enable * @ip_id: IP id * @tcp_seq_num: TCP sequence number * * This structure holds the TSO common info that is common * across all the TCP segments of the jumbo packet. */ struct qdf_tso_cmn_seg_info_t { uint16_t ethproto; uint16_t ip_tcp_hdr_len; uint16_t l2_len; uint8_t *eit_hdr; uint32_t eit_hdr_len; qdf_dma_addr_t eit_hdr_dma_map_addr; struct tcphdr *tcphdr; uint16_t ipv4_csum_en; uint16_t tcp_ipv4_csum_en; uint16_t tcp_ipv6_csum_en; uint16_t ip_id; uint32_t tcp_seq_num; }; /** * __qdf_nbuf_get_tso_cmn_seg_info() - get TSO common * information * @osdev: qdf device handle * @skb: skb buffer * @tso_info: Parameters common to all segements * * Get the TSO information that is common across all the TCP * segments of the jumbo packet * * Return: 0 - success 1 - failure */ static uint8_t __qdf_nbuf_get_tso_cmn_seg_info(qdf_device_t osdev, struct sk_buff *skb, struct qdf_tso_cmn_seg_info_t *tso_info) { /* Get ethernet type and ethernet header length */ tso_info->ethproto = vlan_get_protocol(skb); /* Determine whether this is an IPv4 or IPv6 packet */ if (tso_info->ethproto == htons(ETH_P_IP)) { /* IPv4 */ /* for IPv4, get the IP ID and enable TCP and IP csum */ struct iphdr *ipv4_hdr = ip_hdr(skb); tso_info->ip_id = ntohs(ipv4_hdr->id); tso_info->ipv4_csum_en = 1; tso_info->tcp_ipv4_csum_en = 1; if (qdf_unlikely(ipv4_hdr->protocol != IPPROTO_TCP)) { qdf_err("TSO IPV4 proto 0x%x not TCP", ipv4_hdr->protocol); return 1; } } else if (tso_info->ethproto == htons(ETH_P_IPV6)) { /* IPv6 */ /* for IPv6, enable TCP csum. No IP ID or IP csum */ tso_info->tcp_ipv6_csum_en = 1; } else { qdf_err("TSO: ethertype 0x%x is not supported!", tso_info->ethproto); return 1; } tso_info->l2_len = (skb_network_header(skb) - skb_mac_header(skb)); tso_info->tcphdr = tcp_hdr(skb); tso_info->tcp_seq_num = ntohl(tcp_hdr(skb)->seq); /* get pointer to the ethernet + IP + TCP header and their length */ tso_info->eit_hdr = skb->data; tso_info->eit_hdr_len = (skb_transport_header(skb) - skb_mac_header(skb)) + tcp_hdrlen(skb); tso_info->eit_hdr_dma_map_addr = dma_map_single(osdev->dev, tso_info->eit_hdr, tso_info->eit_hdr_len, DMA_TO_DEVICE); if (unlikely(dma_mapping_error(osdev->dev, tso_info->eit_hdr_dma_map_addr))) { qdf_err("DMA mapping error!"); qdf_assert(0); return 1; } if (tso_info->ethproto == htons(ETH_P_IP)) { /* inlcude IPv4 header length for IPV4 (total length) */ tso_info->ip_tcp_hdr_len = tso_info->eit_hdr_len - tso_info->l2_len; } else if (tso_info->ethproto == htons(ETH_P_IPV6)) { /* exclude IPv6 header length for IPv6 (payload length) */ tso_info->ip_tcp_hdr_len = tcp_hdrlen(skb); } /* * The length of the payload (application layer data) is added to * tso_info->ip_tcp_hdr_len before passing it on to the msdu link ext * descriptor. */ TSO_DEBUG("%s seq# %u eit hdr len %u l2 len %u skb len %u\n", __func__, tso_info->tcp_seq_num, tso_info->eit_hdr_len, tso_info->l2_len, skb->len); return 0; } /** * __qdf_nbuf_fill_tso_cmn_seg_info() - Init function for each TSO nbuf segment * * @curr_seg: Segment whose contents are initialized * @tso_cmn_info: Parameters common to all segements * * Return: None */ static inline void __qdf_nbuf_fill_tso_cmn_seg_info( struct qdf_tso_seg_elem_t *curr_seg, struct qdf_tso_cmn_seg_info_t *tso_cmn_info) { /* Initialize the flags to 0 */ memset(&curr_seg->seg, 0x0, sizeof(curr_seg->seg)); /* * The following fields remain the same across all segments of * a jumbo packet */ curr_seg->seg.tso_flags.tso_enable = 1; curr_seg->seg.tso_flags.ipv4_checksum_en = tso_cmn_info->ipv4_csum_en; curr_seg->seg.tso_flags.tcp_ipv6_checksum_en = tso_cmn_info->tcp_ipv6_csum_en; curr_seg->seg.tso_flags.tcp_ipv4_checksum_en = tso_cmn_info->tcp_ipv4_csum_en; curr_seg->seg.tso_flags.tcp_flags_mask = 0x1FF; /* The following fields change for the segments */ curr_seg->seg.tso_flags.ip_id = tso_cmn_info->ip_id; tso_cmn_info->ip_id++; curr_seg->seg.tso_flags.syn = tso_cmn_info->tcphdr->syn; curr_seg->seg.tso_flags.rst = tso_cmn_info->tcphdr->rst; curr_seg->seg.tso_flags.psh = tso_cmn_info->tcphdr->psh; curr_seg->seg.tso_flags.ack = tso_cmn_info->tcphdr->ack; curr_seg->seg.tso_flags.urg = tso_cmn_info->tcphdr->urg; curr_seg->seg.tso_flags.ece = tso_cmn_info->tcphdr->ece; curr_seg->seg.tso_flags.cwr = tso_cmn_info->tcphdr->cwr; curr_seg->seg.tso_flags.tcp_seq_num = tso_cmn_info->tcp_seq_num; /* * First fragment for each segment always contains the ethernet, * IP and TCP header */ curr_seg->seg.tso_frags[0].vaddr = tso_cmn_info->eit_hdr; curr_seg->seg.tso_frags[0].length = tso_cmn_info->eit_hdr_len; curr_seg->seg.total_len = curr_seg->seg.tso_frags[0].length; curr_seg->seg.tso_frags[0].paddr = tso_cmn_info->eit_hdr_dma_map_addr; TSO_DEBUG("%s %d eit hdr %pK eit_hdr_len %d tcp_seq_num %u tso_info->total_len %u\n", __func__, __LINE__, tso_cmn_info->eit_hdr, tso_cmn_info->eit_hdr_len, curr_seg->seg.tso_flags.tcp_seq_num, curr_seg->seg.total_len); qdf_tso_seg_dbg_record(curr_seg, TSOSEG_LOC_FILLCMNSEG); } /** * __qdf_nbuf_get_tso_info() - function to divide a TSO nbuf * into segments * @nbuf: network buffer to be segmented * @tso_info: This is the output. The information about the * TSO segments will be populated within this. * * This function fragments a TCP jumbo packet into smaller * segments to be transmitted by the driver. It chains the TSO * segments created into a list. * * Return: number of TSO segments */ uint32_t __qdf_nbuf_get_tso_info(qdf_device_t osdev, struct sk_buff *skb, struct qdf_tso_info_t *tso_info) { /* common across all segments */ struct qdf_tso_cmn_seg_info_t tso_cmn_info; /* segment specific */ void *tso_frag_vaddr; qdf_dma_addr_t tso_frag_paddr = 0; uint32_t num_seg = 0; struct qdf_tso_seg_elem_t *curr_seg; struct qdf_tso_num_seg_elem_t *total_num_seg; struct skb_frag_struct *frag = NULL; uint32_t tso_frag_len = 0; /* tso segment's fragment length*/ uint32_t skb_frag_len = 0; /* skb's fragment length (contiguous memory)*/ uint32_t skb_proc = skb->len; /* bytes of skb pending processing */ uint32_t tso_seg_size = skb_shinfo(skb)->gso_size; int j = 0; /* skb fragment index */ memset(&tso_cmn_info, 0x0, sizeof(tso_cmn_info)); total_num_seg = tso_info->tso_num_seg_list; curr_seg = tso_info->tso_seg_list; total_num_seg->num_seg.tso_cmn_num_seg = 0; if (qdf_unlikely(__qdf_nbuf_get_tso_cmn_seg_info(osdev, skb, &tso_cmn_info))) { qdf_warn("TSO: error getting common segment info"); return 0; } /* length of the first chunk of data in the skb */ skb_frag_len = skb_headlen(skb); /* the 0th tso segment's 0th fragment always contains the EIT header */ /* update the remaining skb fragment length and TSO segment length */ skb_frag_len -= tso_cmn_info.eit_hdr_len; skb_proc -= tso_cmn_info.eit_hdr_len; /* get the address to the next tso fragment */ tso_frag_vaddr = skb->data + tso_cmn_info.eit_hdr_len; /* get the length of the next tso fragment */ tso_frag_len = min(skb_frag_len, tso_seg_size); if (tso_frag_len != 0) { tso_frag_paddr = dma_map_single(osdev->dev, tso_frag_vaddr, tso_frag_len, DMA_TO_DEVICE); } if (unlikely(dma_mapping_error(osdev->dev, tso_frag_paddr))) { qdf_err("DMA mapping error!"); qdf_assert(0); return 0; } TSO_DEBUG("%s[%d] skb frag len %d tso frag len %d\n", __func__, __LINE__, skb_frag_len, tso_frag_len); num_seg = tso_info->num_segs; tso_info->num_segs = 0; tso_info->is_tso = 1; while (num_seg && curr_seg) { int i = 1; /* tso fragment index */ uint8_t more_tso_frags = 1; curr_seg->seg.num_frags = 0; tso_info->num_segs++; total_num_seg->num_seg.tso_cmn_num_seg++; __qdf_nbuf_fill_tso_cmn_seg_info(curr_seg, &tso_cmn_info); if (unlikely(skb_proc == 0)) return tso_info->num_segs; curr_seg->seg.tso_flags.ip_len = tso_cmn_info.ip_tcp_hdr_len; curr_seg->seg.tso_flags.l2_len = tso_cmn_info.l2_len; /* frag len is added to ip_len in while loop below*/ curr_seg->seg.num_frags++; while (more_tso_frags) { if (tso_frag_len != 0) { curr_seg->seg.tso_frags[i].vaddr = tso_frag_vaddr; curr_seg->seg.tso_frags[i].length = tso_frag_len; curr_seg->seg.total_len += tso_frag_len; curr_seg->seg.tso_flags.ip_len += tso_frag_len; curr_seg->seg.num_frags++; skb_proc = skb_proc - tso_frag_len; /* increment the TCP sequence number */ tso_cmn_info.tcp_seq_num += tso_frag_len; curr_seg->seg.tso_frags[i].paddr = tso_frag_paddr; } TSO_DEBUG("%s[%d] frag %d frag len %d total_len %u vaddr %pK\n", __func__, __LINE__, i, tso_frag_len, curr_seg->seg.total_len, curr_seg->seg.tso_frags[i].vaddr); /* if there is no more data left in the skb */ if (!skb_proc) return tso_info->num_segs; /* get the next payload fragment information */ /* check if there are more fragments in this segment */ if (tso_frag_len < tso_seg_size) { more_tso_frags = 1; if (tso_frag_len != 0) { tso_seg_size = tso_seg_size - tso_frag_len; i++; if (curr_seg->seg.num_frags == FRAG_NUM_MAX) { more_tso_frags = 0; /* * reset i and the tso * payload size */ i = 1; tso_seg_size = skb_shinfo(skb)-> gso_size; } } } else { more_tso_frags = 0; /* reset i and the tso payload size */ i = 1; tso_seg_size = skb_shinfo(skb)->gso_size; } /* if the next fragment is contiguous */ if ((tso_frag_len != 0) && (tso_frag_len < skb_frag_len)) { tso_frag_vaddr = tso_frag_vaddr + tso_frag_len; skb_frag_len = skb_frag_len - tso_frag_len; tso_frag_len = min(skb_frag_len, tso_seg_size); } else { /* the next fragment is not contiguous */ if (skb_shinfo(skb)->nr_frags == 0) { qdf_info("TSO: nr_frags == 0!"); qdf_assert(0); return 0; } if (j >= skb_shinfo(skb)->nr_frags) { qdf_info("TSO: nr_frags %d j %d", skb_shinfo(skb)->nr_frags, j); qdf_assert(0); return 0; } frag = &skb_shinfo(skb)->frags[j]; skb_frag_len = skb_frag_size(frag); tso_frag_len = min(skb_frag_len, tso_seg_size); tso_frag_vaddr = skb_frag_address_safe(frag); j++; } TSO_DEBUG("%s[%d] skb frag len %d tso frag %d len tso_seg_size %d\n", __func__, __LINE__, skb_frag_len, tso_frag_len, tso_seg_size); if (!(tso_frag_vaddr)) { TSO_DEBUG("%s: Fragment virtual addr is NULL", __func__); return 0; } tso_frag_paddr = dma_map_single(osdev->dev, tso_frag_vaddr, tso_frag_len, DMA_TO_DEVICE); if (unlikely(dma_mapping_error(osdev->dev, tso_frag_paddr))) { qdf_err("DMA mapping error!"); qdf_assert(0); return 0; } } TSO_DEBUG("%s tcp_seq_num: %u", __func__, curr_seg->seg.tso_flags.tcp_seq_num); num_seg--; /* if TCP FIN flag was set, set it in the last segment */ if (!num_seg) curr_seg->seg.tso_flags.fin = tso_cmn_info.tcphdr->fin; qdf_tso_seg_dbg_record(curr_seg, TSOSEG_LOC_GETINFO); curr_seg = curr_seg->next; } return tso_info->num_segs; } qdf_export_symbol(__qdf_nbuf_get_tso_info); /** * __qdf_nbuf_unmap_tso_segment() - function to dma unmap TSO segment element * * @osdev: qdf device handle * @tso_seg: TSO segment element to be unmapped * @is_last_seg: whether this is last tso seg or not * * Return: none */ void __qdf_nbuf_unmap_tso_segment(qdf_device_t osdev, struct qdf_tso_seg_elem_t *tso_seg, bool is_last_seg) { uint32_t num_frags = 0; if (tso_seg->seg.num_frags > 0) num_frags = tso_seg->seg.num_frags - 1; /*Num of frags in a tso seg cannot be less than 2 */ if (num_frags < 1) { /* * If Num of frags is 1 in a tso seg but is_last_seg true, * this may happen when qdf_nbuf_get_tso_info failed, * do dma unmap for the 0th frag in this seg. */ if (is_last_seg && tso_seg->seg.num_frags == 1) goto last_seg_free_first_frag; qdf_assert(0); qdf_err("ERROR: num of frags in a tso segment is %d", (num_frags + 1)); return; } while (num_frags) { /*Do dma unmap the tso seg except the 0th frag */ if (0 == tso_seg->seg.tso_frags[num_frags].paddr) { qdf_err("ERROR: TSO seg frag %d mapped physical address is NULL", num_frags); qdf_assert(0); return; } dma_unmap_single(osdev->dev, tso_seg->seg.tso_frags[num_frags].paddr, tso_seg->seg.tso_frags[num_frags].length, __qdf_dma_dir_to_os(QDF_DMA_TO_DEVICE)); tso_seg->seg.tso_frags[num_frags].paddr = 0; num_frags--; qdf_tso_seg_dbg_record(tso_seg, TSOSEG_LOC_UNMAPTSO); } last_seg_free_first_frag: if (is_last_seg) { /*Do dma unmap for the tso seg 0th frag */ if (0 == tso_seg->seg.tso_frags[0].paddr) { qdf_err("ERROR: TSO seg frag 0 mapped physical address is NULL"); qdf_assert(0); return; } dma_unmap_single(osdev->dev, tso_seg->seg.tso_frags[0].paddr, tso_seg->seg.tso_frags[0].length, __qdf_dma_dir_to_os(QDF_DMA_TO_DEVICE)); tso_seg->seg.tso_frags[0].paddr = 0; qdf_tso_seg_dbg_record(tso_seg, TSOSEG_LOC_UNMAPLAST); } } qdf_export_symbol(__qdf_nbuf_unmap_tso_segment); /** * __qdf_nbuf_get_tso_num_seg() - function to divide a TSO nbuf * into segments * @nbuf: network buffer to be segmented * @tso_info: This is the output. The information about the * TSO segments will be populated within this. * * This function fragments a TCP jumbo packet into smaller * segments to be transmitted by the driver. It chains the TSO * segments created into a list. * * Return: 0 - success, 1 - failure */ #ifndef BUILD_X86 uint32_t __qdf_nbuf_get_tso_num_seg(struct sk_buff *skb) { uint32_t tso_seg_size = skb_shinfo(skb)->gso_size; uint32_t remainder, num_segs = 0; uint8_t skb_nr_frags = skb_shinfo(skb)->nr_frags; uint8_t frags_per_tso = 0; uint32_t skb_frag_len = 0; uint32_t eit_hdr_len = (skb_transport_header(skb) - skb_mac_header(skb)) + tcp_hdrlen(skb); struct skb_frag_struct *frag = NULL; int j = 0; uint32_t temp_num_seg = 0; /* length of the first chunk of data in the skb minus eit header*/ skb_frag_len = skb_headlen(skb) - eit_hdr_len; /* Calculate num of segs for skb's first chunk of data*/ remainder = skb_frag_len % tso_seg_size; num_segs = skb_frag_len / tso_seg_size; /** * Remainder non-zero and nr_frags zero implies end of skb data. * In that case, one more tso seg is required to accommodate * remaining data, hence num_segs++. If nr_frags is non-zero, * then remaining data will be accomodated while doing the calculation * for nr_frags data. Hence, frags_per_tso++. */ if (remainder) { if (!skb_nr_frags) num_segs++; else frags_per_tso++; } while (skb_nr_frags) { if (j >= skb_shinfo(skb)->nr_frags) { qdf_info("TSO: nr_frags %d j %d", skb_shinfo(skb)->nr_frags, j); qdf_assert(0); return 0; } /** * Calculate the number of tso seg for nr_frags data: * Get the length of each frag in skb_frag_len, add to * remainder.Get the number of segments by dividing it to * tso_seg_size and calculate the new remainder. * Decrement the nr_frags value and keep * looping all the skb_fragments. */ frag = &skb_shinfo(skb)->frags[j]; skb_frag_len = skb_frag_size(frag); temp_num_seg = num_segs; remainder += skb_frag_len; num_segs += remainder / tso_seg_size; remainder = remainder % tso_seg_size; skb_nr_frags--; if (remainder) { if (num_segs > temp_num_seg) frags_per_tso = 0; /** * increment the tso per frags whenever remainder is * positive. If frags_per_tso reaches the (max-1), * [First frags always have EIT header, therefore max-1] * increment the num_segs as no more data can be * accomodated in the curr tso seg. Reset the remainder * and frags per tso and keep looping. */ frags_per_tso++; if (frags_per_tso == FRAG_NUM_MAX - 1) { num_segs++; frags_per_tso = 0; remainder = 0; } /** * If this is the last skb frag and still remainder is * non-zero(frags_per_tso is not reached to the max-1) * then increment the num_segs to take care of the * remaining length. */ if (!skb_nr_frags && remainder) { num_segs++; frags_per_tso = 0; } } else { /* Whenever remainder is 0, reset the frags_per_tso. */ frags_per_tso = 0; } j++; } return num_segs; } #else uint32_t __qdf_nbuf_get_tso_num_seg(struct sk_buff *skb) { uint32_t i, gso_size, tmp_len, num_segs = 0; struct skb_frag_struct *frag = NULL; /* * Check if the head SKB or any of frags are allocated in < 0x50000000 * region which cannot be accessed by Target */ if (virt_to_phys(skb->data) < 0x50000040) { TSO_DEBUG("%s %d: Invalid Address nr_frags = %d, paddr = %pK \n", __func__, __LINE__, skb_shinfo(skb)->nr_frags, virt_to_phys(skb->data)); goto fail; } for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { frag = &skb_shinfo(skb)->frags[i]; if (!frag) goto fail; if (virt_to_phys(skb_frag_address_safe(frag)) < 0x50000040) goto fail; } gso_size = skb_shinfo(skb)->gso_size; tmp_len = skb->len - ((skb_transport_header(skb) - skb_mac_header(skb)) + tcp_hdrlen(skb)); while (tmp_len) { num_segs++; if (tmp_len > gso_size) tmp_len -= gso_size; else break; } return num_segs; /* * Do not free this frame, just do socket level accounting * so that this is not reused. */ fail: if (skb->sk) atomic_sub(skb->truesize, &(skb->sk->sk_wmem_alloc)); return 0; } #endif qdf_export_symbol(__qdf_nbuf_get_tso_num_seg); #endif /* FEATURE_TSO */ /** * qdf_dmaaddr_to_32s - return high and low parts of dma_addr * * Returns the high and low 32-bits of the DMA addr in the provided ptrs * * Return: N/A */ void __qdf_dmaaddr_to_32s(qdf_dma_addr_t dmaaddr, uint32_t *lo, uint32_t *hi) { if (sizeof(dmaaddr) > sizeof(uint32_t)) { *lo = lower_32_bits(dmaaddr); *hi = upper_32_bits(dmaaddr); } else { *lo = dmaaddr; *hi = 0; } } qdf_export_symbol(__qdf_dmaaddr_to_32s); struct sk_buff *__qdf_nbuf_inc_users(struct sk_buff *skb) { qdf_nbuf_users_inc(&skb->users); return skb; } qdf_export_symbol(__qdf_nbuf_inc_users); int __qdf_nbuf_get_users(struct sk_buff *skb) { return qdf_nbuf_users_read(&skb->users); } qdf_export_symbol(__qdf_nbuf_get_users); /** * __qdf_nbuf_ref() - Reference the nbuf so it can get held until the last free. * @skb: sk_buff handle * * Return: none */ void __qdf_nbuf_ref(struct sk_buff *skb) { skb_get(skb); } qdf_export_symbol(__qdf_nbuf_ref); /** * __qdf_nbuf_shared() - Check whether the buffer is shared * @skb: sk_buff buffer * * Return: true if more than one person has a reference to this buffer. */ int __qdf_nbuf_shared(struct sk_buff *skb) { return skb_shared(skb); } qdf_export_symbol(__qdf_nbuf_shared); /** * __qdf_nbuf_dmamap_create() - create a DMA map. * @osdev: qdf device handle * @dmap: dma map handle * * This can later be used to map networking buffers. They : * - need space in adf_drv's software descriptor * - are typically created during adf_drv_create * - need to be created before any API(qdf_nbuf_map) that uses them * * Return: QDF STATUS */ QDF_STATUS __qdf_nbuf_dmamap_create(qdf_device_t osdev, __qdf_dma_map_t *dmap) { QDF_STATUS error = QDF_STATUS_SUCCESS; /* * driver can tell its SG capablity, it must be handled. * Bounce buffers if they are there */ (*dmap) = kzalloc(sizeof(struct __qdf_dma_map), GFP_KERNEL); if (!(*dmap)) error = QDF_STATUS_E_NOMEM; return error; } qdf_export_symbol(__qdf_nbuf_dmamap_create); /** * __qdf_nbuf_dmamap_destroy() - delete a dma map * @osdev: qdf device handle * @dmap: dma map handle * * Return: none */ void __qdf_nbuf_dmamap_destroy(qdf_device_t osdev, __qdf_dma_map_t dmap) { kfree(dmap); } qdf_export_symbol(__qdf_nbuf_dmamap_destroy); /** * __qdf_nbuf_map_nbytes_single() - map nbytes * @osdev: os device * @buf: buffer * @dir: direction * @nbytes: number of bytes * * Return: QDF_STATUS */ #ifdef A_SIMOS_DEVHOST QDF_STATUS __qdf_nbuf_map_nbytes_single( qdf_device_t osdev, struct sk_buff *buf, qdf_dma_dir_t dir, int nbytes) { qdf_dma_addr_t paddr; QDF_NBUF_CB_PADDR(buf) = paddr = buf->data; return QDF_STATUS_SUCCESS; } qdf_export_symbol(__qdf_nbuf_map_nbytes_single); #else QDF_STATUS __qdf_nbuf_map_nbytes_single( qdf_device_t osdev, struct sk_buff *buf, qdf_dma_dir_t dir, int nbytes) { qdf_dma_addr_t paddr; /* assume that the OS only provides a single fragment */ QDF_NBUF_CB_PADDR(buf) = paddr = dma_map_single(osdev->dev, buf->data, nbytes, __qdf_dma_dir_to_os(dir)); return dma_mapping_error(osdev->dev, paddr) ? QDF_STATUS_E_FAULT : QDF_STATUS_SUCCESS; } qdf_export_symbol(__qdf_nbuf_map_nbytes_single); #endif /** * __qdf_nbuf_unmap_nbytes_single() - unmap nbytes * @osdev: os device * @buf: buffer * @dir: direction * @nbytes: number of bytes * * Return: none */ #if defined(A_SIMOS_DEVHOST) void __qdf_nbuf_unmap_nbytes_single( qdf_device_t osdev, struct sk_buff *buf, qdf_dma_dir_t dir, int nbytes) { } qdf_export_symbol(__qdf_nbuf_unmap_nbytes_single); #else void __qdf_nbuf_unmap_nbytes_single( qdf_device_t osdev, struct sk_buff *buf, qdf_dma_dir_t dir, int nbytes) { if (0 == QDF_NBUF_CB_PADDR(buf)) { qdf_err("ERROR: NBUF mapped physical address is NULL"); return; } dma_unmap_single(osdev->dev, QDF_NBUF_CB_PADDR(buf), nbytes, __qdf_dma_dir_to_os(dir)); } qdf_export_symbol(__qdf_nbuf_unmap_nbytes_single); #endif /** * __qdf_nbuf_map_nbytes() - get the dma map of the nbuf * @osdev: os device * @skb: skb handle * @dir: dma direction * @nbytes: number of bytes to be mapped * * Return: QDF_STATUS */ #ifdef QDF_OS_DEBUG QDF_STATUS __qdf_nbuf_map_nbytes( qdf_device_t osdev, struct sk_buff *skb, qdf_dma_dir_t dir, int nbytes) { struct skb_shared_info *sh = skb_shinfo(skb); qdf_assert((dir == QDF_DMA_TO_DEVICE) || (dir == QDF_DMA_FROM_DEVICE)); /* * Assume there's only a single fragment. * To support multiple fragments, it would be necessary to change * adf_nbuf_t to be a separate object that stores meta-info * (including the bus address for each fragment) and a pointer * to the underlying sk_buff. */ qdf_assert(sh->nr_frags == 0); return __qdf_nbuf_map_nbytes_single(osdev, skb, dir, nbytes); } qdf_export_symbol(__qdf_nbuf_map_nbytes); #else QDF_STATUS __qdf_nbuf_map_nbytes( qdf_device_t osdev, struct sk_buff *skb, qdf_dma_dir_t dir, int nbytes) { return __qdf_nbuf_map_nbytes_single(osdev, skb, dir, nbytes); } qdf_export_symbol(__qdf_nbuf_map_nbytes); #endif /** * __qdf_nbuf_unmap_nbytes() - to unmap a previously mapped buf * @osdev: OS device * @skb: skb handle * @dir: direction * @nbytes: number of bytes * * Return: none */ void __qdf_nbuf_unmap_nbytes( qdf_device_t osdev, struct sk_buff *skb, qdf_dma_dir_t dir, int nbytes) { qdf_assert((dir == QDF_DMA_TO_DEVICE) || (dir == QDF_DMA_FROM_DEVICE)); /* * Assume there's a single fragment. * If this is not true, the assertion in __adf_nbuf_map will catch it. */ __qdf_nbuf_unmap_nbytes_single(osdev, skb, dir, nbytes); } qdf_export_symbol(__qdf_nbuf_unmap_nbytes); /** * __qdf_nbuf_dma_map_info() - return the dma map info * @bmap: dma map * @sg: dma map info * * Return: none */ void __qdf_nbuf_dma_map_info(__qdf_dma_map_t bmap, qdf_dmamap_info_t *sg) { qdf_assert(bmap->mapped); qdf_assert(bmap->nsegs <= QDF_MAX_SCATTER); memcpy(sg->dma_segs, bmap->seg, bmap->nsegs * sizeof(struct __qdf_segment)); sg->nsegs = bmap->nsegs; } qdf_export_symbol(__qdf_nbuf_dma_map_info); /** * __qdf_nbuf_frag_info() - return the frag data & len, where frag no. is * specified by the index * @skb: sk buff * @sg: scatter/gather list of all the frags * * Return: none */ #if defined(__QDF_SUPPORT_FRAG_MEM) void __qdf_nbuf_frag_info(struct sk_buff *skb, qdf_sglist_t *sg) { qdf_assert(skb != NULL); sg->sg_segs[0].vaddr = skb->data; sg->sg_segs[0].len = skb->len; sg->nsegs = 1; for (int i = 1; i <= sh->nr_frags; i++) { skb_frag_t *f = &sh->frags[i - 1]; sg->sg_segs[i].vaddr = (uint8_t *)(page_address(f->page) + f->page_offset); sg->sg_segs[i].len = f->size; qdf_assert(i < QDF_MAX_SGLIST); } sg->nsegs += i; } qdf_export_symbol(__qdf_nbuf_frag_info); #else #ifdef QDF_OS_DEBUG void __qdf_nbuf_frag_info(struct sk_buff *skb, qdf_sglist_t *sg) { struct skb_shared_info *sh = skb_shinfo(skb); qdf_assert(skb != NULL); sg->sg_segs[0].vaddr = skb->data; sg->sg_segs[0].len = skb->len; sg->nsegs = 1; qdf_assert(sh->nr_frags == 0); } qdf_export_symbol(__qdf_nbuf_frag_info); #else void __qdf_nbuf_frag_info(struct sk_buff *skb, qdf_sglist_t *sg) { sg->sg_segs[0].vaddr = skb->data; sg->sg_segs[0].len = skb->len; sg->nsegs = 1; } qdf_export_symbol(__qdf_nbuf_frag_info); #endif #endif /** * __qdf_nbuf_get_frag_size() - get frag size * @nbuf: sk buffer * @cur_frag: current frag * * Return: frag size */ uint32_t __qdf_nbuf_get_frag_size(__qdf_nbuf_t nbuf, uint32_t cur_frag) { struct skb_shared_info *sh = skb_shinfo(nbuf); const skb_frag_t *frag = sh->frags + cur_frag; return skb_frag_size(frag); } qdf_export_symbol(__qdf_nbuf_get_frag_size); /** * __qdf_nbuf_frag_map() - dma map frag * @osdev: os device * @nbuf: sk buff * @offset: offset * @dir: direction * @cur_frag: current fragment * * Return: QDF status */ #ifdef A_SIMOS_DEVHOST QDF_STATUS __qdf_nbuf_frag_map( qdf_device_t osdev, __qdf_nbuf_t nbuf, int offset, qdf_dma_dir_t dir, int cur_frag) { int32_t paddr, frag_len; QDF_NBUF_CB_PADDR(nbuf) = paddr = nbuf->data; return QDF_STATUS_SUCCESS; } qdf_export_symbol(__qdf_nbuf_frag_map); #else QDF_STATUS __qdf_nbuf_frag_map( qdf_device_t osdev, __qdf_nbuf_t nbuf, int offset, qdf_dma_dir_t dir, int cur_frag) { dma_addr_t paddr, frag_len; struct skb_shared_info *sh = skb_shinfo(nbuf); const skb_frag_t *frag = sh->frags + cur_frag; frag_len = skb_frag_size(frag); QDF_NBUF_CB_TX_EXTRA_FRAG_PADDR(nbuf) = paddr = skb_frag_dma_map(osdev->dev, frag, offset, frag_len, __qdf_dma_dir_to_os(dir)); return dma_mapping_error(osdev->dev, paddr) ? QDF_STATUS_E_FAULT : QDF_STATUS_SUCCESS; } qdf_export_symbol(__qdf_nbuf_frag_map); #endif /** * __qdf_nbuf_dmamap_set_cb() - setup the map callback for a dma map * @dmap: dma map * @cb: callback * @arg: argument * * Return: none */ void __qdf_nbuf_dmamap_set_cb(__qdf_dma_map_t dmap, void *cb, void *arg) { return; } qdf_export_symbol(__qdf_nbuf_dmamap_set_cb); /** * __qdf_nbuf_sync_single_for_cpu() - nbuf sync * @osdev: os device * @buf: sk buff * @dir: direction * * Return: none */ #if defined(A_SIMOS_DEVHOST) static void __qdf_nbuf_sync_single_for_cpu( qdf_device_t osdev, qdf_nbuf_t buf, qdf_dma_dir_t dir) { return; } #else static void __qdf_nbuf_sync_single_for_cpu( qdf_device_t osdev, qdf_nbuf_t buf, qdf_dma_dir_t dir) { if (0 == QDF_NBUF_CB_PADDR(buf)) { qdf_err("ERROR: NBUF mapped physical address is NULL"); return; } dma_sync_single_for_cpu(osdev->dev, QDF_NBUF_CB_PADDR(buf), skb_end_offset(buf) - skb_headroom(buf), __qdf_dma_dir_to_os(dir)); } #endif /** * __qdf_nbuf_sync_for_cpu() - nbuf sync * @osdev: os device * @skb: sk buff * @dir: direction * * Return: none */ void __qdf_nbuf_sync_for_cpu(qdf_device_t osdev, struct sk_buff *skb, qdf_dma_dir_t dir) { qdf_assert( (dir == QDF_DMA_TO_DEVICE) || (dir == QDF_DMA_FROM_DEVICE)); /* * Assume there's a single fragment. * If this is not true, the assertion in __adf_nbuf_map will catch it. */ __qdf_nbuf_sync_single_for_cpu(osdev, skb, dir); } qdf_export_symbol(__qdf_nbuf_sync_for_cpu); #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 10, 0)) /** * qdf_nbuf_update_radiotap_vht_flags() - Update radiotap header VHT flags * @rx_status: Pointer to rx_status. * @rtap_buf: Buf to which VHT info has to be updated. * @rtap_len: Current length of radiotap buffer * * Return: Length of radiotap after VHT flags updated. */ static unsigned int qdf_nbuf_update_radiotap_vht_flags( struct mon_rx_status *rx_status, int8_t *rtap_buf, uint32_t rtap_len) { uint16_t vht_flags = 0; rtap_len = qdf_align(rtap_len, 2); /* IEEE80211_RADIOTAP_VHT u16, u8, u8, u8[4], u8, u8, u16 */ vht_flags |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC | IEEE80211_RADIOTAP_VHT_KNOWN_GI | IEEE80211_RADIOTAP_VHT_KNOWN_LDPC_EXTRA_OFDM_SYM | IEEE80211_RADIOTAP_VHT_KNOWN_BEAMFORMED | IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH | IEEE80211_RADIOTAP_VHT_KNOWN_GROUP_ID; put_unaligned_le16(vht_flags, &rtap_buf[rtap_len]); rtap_len += 2; rtap_buf[rtap_len] |= (rx_status->is_stbc ? IEEE80211_RADIOTAP_VHT_FLAG_STBC : 0) | (rx_status->sgi ? IEEE80211_RADIOTAP_VHT_FLAG_SGI : 0) | (rx_status->ldpc ? IEEE80211_RADIOTAP_VHT_FLAG_LDPC_EXTRA_OFDM_SYM : 0) | (rx_status->beamformed ? IEEE80211_RADIOTAP_VHT_FLAG_BEAMFORMED : 0); rtap_len += 1; switch (rx_status->vht_flag_values2) { case IEEE80211_RADIOTAP_VHT_BW_20: rtap_buf[rtap_len] = RADIOTAP_VHT_BW_20; break; case IEEE80211_RADIOTAP_VHT_BW_40: rtap_buf[rtap_len] = RADIOTAP_VHT_BW_40; break; case IEEE80211_RADIOTAP_VHT_BW_80: rtap_buf[rtap_len] = RADIOTAP_VHT_BW_80; break; case IEEE80211_RADIOTAP_VHT_BW_160: rtap_buf[rtap_len] = RADIOTAP_VHT_BW_160; break; } rtap_len += 1; rtap_buf[rtap_len] = (rx_status->vht_flag_values3[0]); rtap_len += 1; rtap_buf[rtap_len] = (rx_status->vht_flag_values3[1]); rtap_len += 1; rtap_buf[rtap_len] = (rx_status->vht_flag_values3[2]); rtap_len += 1; rtap_buf[rtap_len] = (rx_status->vht_flag_values3[3]); rtap_len += 1; rtap_buf[rtap_len] = (rx_status->vht_flag_values4); rtap_len += 1; rtap_buf[rtap_len] = (rx_status->vht_flag_values5); rtap_len += 1; put_unaligned_le16(rx_status->vht_flag_values6, &rtap_buf[rtap_len]); rtap_len += 2; return rtap_len; } /** * qdf_nbuf_update_radiotap_he_flags() - Update radiotap header from rx_status * @rx_status: Pointer to rx_status. * @rtap_buf: buffer to which radiotap has to be updated * @rtap_len: radiotap length * * API update high-efficiency (11ax) fields in the radiotap header * * Return: length of rtap_len updated. */ static unsigned int qdf_nbuf_update_radiotap_he_flags(struct mon_rx_status *rx_status, int8_t *rtap_buf, uint32_t rtap_len) { /* * IEEE80211_RADIOTAP_HE u16, u16, u16, u16, u16, u16 * Enable all "known" HE radiotap flags for now */ rtap_len = qdf_align(rtap_len, 2); put_unaligned_le16(rx_status->he_data1, &rtap_buf[rtap_len]); rtap_len += 2; put_unaligned_le16(rx_status->he_data2, &rtap_buf[rtap_len]); rtap_len += 2; put_unaligned_le16(rx_status->he_data3, &rtap_buf[rtap_len]); rtap_len += 2; put_unaligned_le16(rx_status->he_data4, &rtap_buf[rtap_len]); rtap_len += 2; put_unaligned_le16(rx_status->he_data5, &rtap_buf[rtap_len]); rtap_len += 2; put_unaligned_le16(rx_status->he_data6, &rtap_buf[rtap_len]); rtap_len += 2; qdf_debug("he data %x %x %x %x %x %x", rx_status->he_data1, rx_status->he_data2, rx_status->he_data3, rx_status->he_data4, rx_status->he_data5, rx_status->he_data6); return rtap_len; } /** * qdf_nbuf_update_radiotap_he_mu_flags() - update he-mu radiotap flags * @rx_status: Pointer to rx_status. * @rtap_buf: buffer to which radiotap has to be updated * @rtap_len: radiotap length * * API update HE-MU fields in the radiotap header * * Return: length of rtap_len updated. */ static unsigned int qdf_nbuf_update_radiotap_he_mu_flags(struct mon_rx_status *rx_status, int8_t *rtap_buf, uint32_t rtap_len) { rtap_len = qdf_align(rtap_len, 2); /* * IEEE80211_RADIOTAP_HE_MU u16, u16, u8[4] * Enable all "known" he-mu radiotap flags for now */ put_unaligned_le16(rx_status->he_flags1, &rtap_buf[rtap_len]); rtap_len += 2; put_unaligned_le16(rx_status->he_flags2, &rtap_buf[rtap_len]); rtap_len += 2; rtap_buf[rtap_len] = rx_status->he_RU[0]; rtap_len += 1; rtap_buf[rtap_len] = rx_status->he_RU[1]; rtap_len += 1; rtap_buf[rtap_len] = rx_status->he_RU[2]; rtap_len += 1; rtap_buf[rtap_len] = rx_status->he_RU[3]; rtap_len += 1; qdf_debug("he_flags %x %x he-RU %x %x %x %x", rx_status->he_flags1, rx_status->he_flags2, rx_status->he_RU[0], rx_status->he_RU[1], rx_status->he_RU[2], rx_status->he_RU[3]); return rtap_len; } /** * qdf_nbuf_update_radiotap_he_mu_other_flags() - update he_mu_other flags * @rx_status: Pointer to rx_status. * @rtap_buf: buffer to which radiotap has to be updated * @rtap_len: radiotap length * * API update he-mu-other fields in the radiotap header * * Return: length of rtap_len updated. */ static unsigned int qdf_nbuf_update_radiotap_he_mu_other_flags(struct mon_rx_status *rx_status, int8_t *rtap_buf, uint32_t rtap_len) { rtap_len = qdf_align(rtap_len, 2); /* * IEEE80211_RADIOTAP_HE-MU-OTHER u16, u16, u8, u8 * Enable all "known" he-mu-other radiotap flags for now */ put_unaligned_le16(rx_status->he_per_user_1, &rtap_buf[rtap_len]); rtap_len += 2; put_unaligned_le16(rx_status->he_per_user_2, &rtap_buf[rtap_len]); rtap_len += 2; rtap_buf[rtap_len] = rx_status->he_per_user_position; rtap_len += 1; rtap_buf[rtap_len] = rx_status->he_per_user_known; rtap_len += 1; qdf_debug("he_per_user %x %x pos %x knwn %x", rx_status->he_per_user_1, rx_status->he_per_user_2, rx_status->he_per_user_position, rx_status->he_per_user_known); return rtap_len; } /** * This is the length for radiotap, combined length * (Mandatory part struct ieee80211_radiotap_header + RADIOTAP_HEADER_LEN) * cannot be more than available headroom_sz. * increase this when we add more radiotap elements. * Number after '+' indicates maximum possible increase due to alignment */ #define RADIOTAP_VHT_FLAGS_LEN (12 + 1) #define RADIOTAP_HE_FLAGS_LEN (12 + 1) #define RADIOTAP_HE_MU_FLAGS_LEN (8 + 1) #define RADIOTAP_HE_MU_OTHER_FLAGS_LEN (18 + 1) #define RADIOTAP_FIXED_HEADER_LEN 17 #define RADIOTAP_HT_FLAGS_LEN 3 #define RADIOTAP_AMPDU_STATUS_LEN (8 + 3) #define RADIOTAP_VENDOR_NS_LEN \ (sizeof(struct qdf_radiotap_vendor_ns_ath) + 1) #define RADIOTAP_HEADER_LEN (sizeof(struct ieee80211_radiotap_header) + \ RADIOTAP_FIXED_HEADER_LEN + \ RADIOTAP_HT_FLAGS_LEN + \ RADIOTAP_VHT_FLAGS_LEN + \ RADIOTAP_AMPDU_STATUS_LEN + \ RADIOTAP_HE_FLAGS_LEN + \ RADIOTAP_HE_MU_FLAGS_LEN + \ RADIOTAP_HE_MU_OTHER_FLAGS_LEN + \ RADIOTAP_VENDOR_NS_LEN) #define IEEE80211_RADIOTAP_HE 23 #define IEEE80211_RADIOTAP_HE_MU 24 #define IEEE80211_RADIOTAP_HE_MU_OTHER 25 uint8_t ATH_OUI[] = {0x00, 0x03, 0x7f}; /* Atheros OUI */ /** * radiotap_num_to_freq() - Get frequency from chan number * @chan_num - Input channel number * * Return - Channel frequency in Mhz */ static uint16_t radiotap_num_to_freq (uint16_t chan_num) { if (chan_num == CHANNEL_NUM_14) return CHANNEL_FREQ_2484; if (chan_num < CHANNEL_NUM_14) return CHANNEL_FREQ_2407 + (chan_num * FREQ_MULTIPLIER_CONST_5MHZ); if (chan_num < CHANNEL_NUM_27) return CHANNEL_FREQ_2512 + ((chan_num - CHANNEL_NUM_15) * FREQ_MULTIPLIER_CONST_20MHZ); if (chan_num > CHANNEL_NUM_182 && chan_num < CHANNEL_NUM_197) return ((chan_num * FREQ_MULTIPLIER_CONST_5MHZ) + CHANNEL_FREQ_4000); return CHANNEL_FREQ_5000 + (chan_num * FREQ_MULTIPLIER_CONST_5MHZ); } /** * qdf_nbuf_update_radiotap_ampdu_flags() - Update radiotap header ampdu flags * @rx_status: Pointer to rx_status. * @rtap_buf: Buf to which AMPDU info has to be updated. * @rtap_len: Current length of radiotap buffer * * Return: Length of radiotap after AMPDU flags updated. */ static unsigned int qdf_nbuf_update_radiotap_ampdu_flags( struct mon_rx_status *rx_status, uint8_t *rtap_buf, uint32_t rtap_len) { /* * IEEE80211_RADIOTAP_AMPDU_STATUS u32 u16 u8 u8 * First 32 bits of AMPDU represents the reference number */ uint32_t ampdu_reference_num = rx_status->ppdu_id; uint16_t ampdu_flags = 0; uint16_t ampdu_reserved_flags = 0; rtap_len = qdf_align(rtap_len, 4); put_unaligned_le32(ampdu_reference_num, &rtap_buf[rtap_len]); rtap_len += 4; put_unaligned_le16(ampdu_flags, &rtap_buf[rtap_len]); rtap_len += 2; put_unaligned_le16(ampdu_reserved_flags, &rtap_buf[rtap_len]); rtap_len += 2; return rtap_len; } /** * qdf_nbuf_update_radiotap() - Update radiotap header from rx_status * @rx_status: Pointer to rx_status. * @nbuf: nbuf pointer to which radiotap has to be updated * @headroom_sz: Available headroom size. * * Return: length of rtap_len updated. */ unsigned int qdf_nbuf_update_radiotap(struct mon_rx_status *rx_status, qdf_nbuf_t nbuf, uint32_t headroom_sz) { uint8_t rtap_buf[RADIOTAP_HEADER_LEN] = {0}; struct ieee80211_radiotap_header *rthdr = (struct ieee80211_radiotap_header *)rtap_buf; uint32_t rtap_hdr_len = sizeof(struct ieee80211_radiotap_header); uint32_t rtap_len = rtap_hdr_len; uint8_t length = rtap_len; struct qdf_radiotap_vendor_ns_ath *radiotap_vendor_ns_ath; /* IEEE80211_RADIOTAP_TSFT __le64 microseconds*/ rthdr->it_present = (1 << IEEE80211_RADIOTAP_TSFT); put_unaligned_le64(rx_status->tsft, &rtap_buf[rtap_len]); rtap_len += 8; /* IEEE80211_RADIOTAP_FLAGS u8 */ rthdr->it_present |= (1 << IEEE80211_RADIOTAP_FLAGS); if (rx_status->rs_fcs_err) rx_status->rtap_flags |= IEEE80211_RADIOTAP_F_BADFCS; rtap_buf[rtap_len] = rx_status->rtap_flags; rtap_len += 1; /* IEEE80211_RADIOTAP_RATE u8 500kb/s */ if (!rx_status->ht_flags && !rx_status->vht_flags && !rx_status->he_flags) { rthdr->it_present |= (1 << IEEE80211_RADIOTAP_RATE); rtap_buf[rtap_len] = rx_status->rate; } else rtap_buf[rtap_len] = 0; rtap_len += 1; /* IEEE80211_RADIOTAP_CHANNEL 2 x __le16 MHz, bitmap */ rthdr->it_present |= (1 << IEEE80211_RADIOTAP_CHANNEL); rx_status->chan_freq = radiotap_num_to_freq(rx_status->chan_num); put_unaligned_le16(rx_status->chan_freq, &rtap_buf[rtap_len]); rtap_len += 2; /* Channel flags. */ if (rx_status->chan_num > CHANNEL_NUM_35) rx_status->chan_flags = RADIOTAP_5G_SPECTRUM_CHANNEL; else rx_status->chan_flags = RADIOTAP_2G_SPECTRUM_CHANNEL; if (rx_status->cck_flag) rx_status->chan_flags |= RADIOTAP_CCK_CHANNEL; if (rx_status->ofdm_flag) rx_status->chan_flags |= RADIOTAP_OFDM_CHANNEL; put_unaligned_le16(rx_status->chan_flags, &rtap_buf[rtap_len]); rtap_len += 2; /* IEEE80211_RADIOTAP_DBM_ANTSIGNAL s8 decibels from one milliwatt * (dBm) */ rthdr->it_present |= (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL); /* * rssi_comb is int dB, need to convert it to dBm. * normalize value to noise floor of -96 dBm */ rtap_buf[rtap_len] = rx_status->rssi_comb + rx_status->chan_noise_floor; rtap_len += 1; /* RX signal noise floor */ rthdr->it_present |= (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE); rtap_buf[rtap_len] = (uint8_t)rx_status->chan_noise_floor; rtap_len += 1; /* IEEE80211_RADIOTAP_ANTENNA u8 antenna index */ rthdr->it_present |= (1 << IEEE80211_RADIOTAP_ANTENNA); rtap_buf[rtap_len] = rx_status->nr_ant; rtap_len += 1; if ((rtap_len - length) > RADIOTAP_FIXED_HEADER_LEN) { qdf_print("length is greater than RADIOTAP_FIXED_HEADER_LEN"); return 0; } if (rx_status->ht_flags) { length = rtap_len; /* IEEE80211_RADIOTAP_VHT u8, u8, u8 */ rthdr->it_present |= (1 << IEEE80211_RADIOTAP_MCS); rtap_buf[rtap_len] = IEEE80211_RADIOTAP_MCS_HAVE_BW | IEEE80211_RADIOTAP_MCS_HAVE_MCS | IEEE80211_RADIOTAP_MCS_HAVE_GI; rtap_len += 1; if (rx_status->sgi) rtap_buf[rtap_len] |= IEEE80211_RADIOTAP_MCS_SGI; if (rx_status->bw) rtap_buf[rtap_len] |= IEEE80211_RADIOTAP_MCS_BW_40; else rtap_buf[rtap_len] |= IEEE80211_RADIOTAP_MCS_BW_20; rtap_len += 1; rtap_buf[rtap_len] = rx_status->ht_mcs; rtap_len += 1; if ((rtap_len - length) > RADIOTAP_HT_FLAGS_LEN) { qdf_print("length is greater than RADIOTAP_HT_FLAGS_LEN"); return 0; } } if (rx_status->rs_flags & IEEE80211_AMPDU_FLAG) { /* IEEE80211_RADIOTAP_AMPDU_STATUS u32 u16 u8 u8 */ rthdr->it_present |= (1 << IEEE80211_RADIOTAP_AMPDU_STATUS); rtap_len = qdf_nbuf_update_radiotap_ampdu_flags(rx_status, rtap_buf, rtap_len); } if (rx_status->vht_flags) { length = rtap_len; /* IEEE80211_RADIOTAP_VHT u16, u8, u8, u8[4], u8, u8, u16 */ rthdr->it_present |= (1 << IEEE80211_RADIOTAP_VHT); rtap_len = qdf_nbuf_update_radiotap_vht_flags(rx_status, rtap_buf, rtap_len); if ((rtap_len - length) > RADIOTAP_VHT_FLAGS_LEN) { qdf_print("length is greater than RADIOTAP_VHT_FLAGS_LEN"); return 0; } } if (rx_status->he_flags) { length = rtap_len; /* IEEE80211_RADIOTAP_HE */ rthdr->it_present |= (1 << IEEE80211_RADIOTAP_HE); rtap_len = qdf_nbuf_update_radiotap_he_flags(rx_status, rtap_buf, rtap_len); if ((rtap_len - length) > RADIOTAP_HE_FLAGS_LEN) { qdf_print("length is greater than RADIOTAP_HE_FLAGS_LEN"); return 0; } } if (rx_status->he_mu_flags) { length = rtap_len; /* IEEE80211_RADIOTAP_HE-MU */ rthdr->it_present |= (1 << IEEE80211_RADIOTAP_HE_MU); rtap_len = qdf_nbuf_update_radiotap_he_mu_flags(rx_status, rtap_buf, rtap_len); if ((rtap_len - length) > RADIOTAP_HE_MU_FLAGS_LEN) { qdf_print("length is greater than RADIOTAP_HE_MU_FLAGS_LEN"); return 0; } } if (rx_status->he_mu_other_flags) { length = rtap_len; /* IEEE80211_RADIOTAP_HE-MU-OTHER */ rthdr->it_present |= (1 << IEEE80211_RADIOTAP_HE_MU_OTHER); rtap_len = qdf_nbuf_update_radiotap_he_mu_other_flags(rx_status, rtap_buf, rtap_len); if ((rtap_len - length) > RADIOTAP_HE_MU_OTHER_FLAGS_LEN) { qdf_print("length is greater than RADIOTAP_HE_MU_OTHER_FLAGS_LEN"); return 0; } } rtap_len = qdf_align(rtap_len, 2); /* * Radiotap Vendor Namespace */ rthdr->it_present |= (1 << IEEE80211_RADIOTAP_VENDOR_NAMESPACE); radiotap_vendor_ns_ath = (struct qdf_radiotap_vendor_ns_ath *) (rtap_buf + rtap_len); /* * Copy Atheros OUI - 3 bytes (4th byte is 0) */ qdf_mem_copy(radiotap_vendor_ns_ath->hdr.oui, ATH_OUI, sizeof(ATH_OUI)); /* * Name space selector = 0 * We only will have one namespace for now */ radiotap_vendor_ns_ath->hdr.selector = 0; radiotap_vendor_ns_ath->hdr.skip_length = cpu_to_le16( sizeof(*radiotap_vendor_ns_ath) - sizeof(radiotap_vendor_ns_ath->hdr)); radiotap_vendor_ns_ath->device_id = cpu_to_le32(rx_status->device_id); radiotap_vendor_ns_ath->lsig = cpu_to_le32(rx_status->l_sig_a_info); radiotap_vendor_ns_ath->lsig_b = cpu_to_le32(rx_status->l_sig_b_info); radiotap_vendor_ns_ath->ppdu_start_timestamp = cpu_to_le32(rx_status->ppdu_timestamp); rtap_len += sizeof(*radiotap_vendor_ns_ath); rthdr->it_len = cpu_to_le16(rtap_len); rthdr->it_present = cpu_to_le32(rthdr->it_present); if (headroom_sz < rtap_len) { qdf_err("ERROR: not enough space to update radiotap"); return 0; } qdf_nbuf_push_head(nbuf, rtap_len); qdf_mem_copy(qdf_nbuf_data(nbuf), rtap_buf, rtap_len); return rtap_len; } #else static unsigned int qdf_nbuf_update_radiotap_vht_flags( struct mon_rx_status *rx_status, int8_t *rtap_buf, uint32_t rtap_len) { qdf_err("ERROR: struct ieee80211_radiotap_header not supported"); return 0; } unsigned int qdf_nbuf_update_radiotap_he_flags(struct mon_rx_status *rx_status, int8_t *rtap_buf, uint32_t rtap_len) { qdf_err("ERROR: struct ieee80211_radiotap_header not supported"); return 0; } static unsigned int qdf_nbuf_update_radiotap_ampdu_flags( struct mon_rx_status *rx_status, uint8_t *rtap_buf, uint32_t rtap_len) { qdf_err("ERROR: struct ieee80211_radiotap_header not supported"); return 0; } unsigned int qdf_nbuf_update_radiotap(struct mon_rx_status *rx_status, qdf_nbuf_t nbuf, uint32_t headroom_sz) { qdf_err("ERROR: struct ieee80211_radiotap_header not supported"); return 0; } #endif qdf_export_symbol(qdf_nbuf_update_radiotap); /** * __qdf_nbuf_reg_free_cb() - register nbuf free callback * @cb_func_ptr: function pointer to the nbuf free callback * * This function registers a callback function for nbuf free. * * Return: none */ void __qdf_nbuf_reg_free_cb(qdf_nbuf_free_t cb_func_ptr) { nbuf_free_cb = cb_func_ptr; } /** * qdf_nbuf_classify_pkt() - classify packet * @skb - sk buff * * Return: none */ void qdf_nbuf_classify_pkt(struct sk_buff *skb) { struct ethhdr *eh = (struct ethhdr *)skb->data; /* check destination mac address is broadcast/multicast */ if (is_broadcast_ether_addr((uint8_t *)eh)) QDF_NBUF_CB_SET_BCAST(skb); else if (is_multicast_ether_addr((uint8_t *)eh)) QDF_NBUF_CB_SET_MCAST(skb); if (qdf_nbuf_is_ipv4_arp_pkt(skb)) QDF_NBUF_CB_GET_PACKET_TYPE(skb) = QDF_NBUF_CB_PACKET_TYPE_ARP; else if (qdf_nbuf_is_ipv4_dhcp_pkt(skb)) QDF_NBUF_CB_GET_PACKET_TYPE(skb) = QDF_NBUF_CB_PACKET_TYPE_DHCP; else if (qdf_nbuf_is_ipv4_eapol_pkt(skb)) QDF_NBUF_CB_GET_PACKET_TYPE(skb) = QDF_NBUF_CB_PACKET_TYPE_EAPOL; else if (qdf_nbuf_is_ipv4_wapi_pkt(skb)) QDF_NBUF_CB_GET_PACKET_TYPE(skb) = QDF_NBUF_CB_PACKET_TYPE_WAPI; } qdf_export_symbol(qdf_nbuf_classify_pkt); void __qdf_nbuf_init(__qdf_nbuf_t nbuf) { qdf_nbuf_users_set(&nbuf->users, 1); nbuf->data = nbuf->head + NET_SKB_PAD; skb_reset_tail_pointer(nbuf); } qdf_export_symbol(__qdf_nbuf_init); #ifdef WLAN_FEATURE_FASTPATH void qdf_nbuf_init_fast(qdf_nbuf_t nbuf) { qdf_nbuf_users_set(&nbuf->users, 1); nbuf->data = nbuf->head + NET_SKB_PAD; skb_reset_tail_pointer(nbuf); } qdf_export_symbol(qdf_nbuf_init_fast); #endif /* WLAN_FEATURE_FASTPATH */ #ifdef QDF_NBUF_GLOBAL_COUNT /** * __qdf_nbuf_mod_init() - Intialization routine for qdf_nuf * * Return void */ void __qdf_nbuf_mod_init(void) { qdf_atomic_init(&nbuf_count); qdf_debugfs_create_atomic(NBUF_DEBUGFS_NAME, S_IRUSR, NULL, &nbuf_count); } /** * __qdf_nbuf_mod_exit() - Unintialization routine for qdf_nuf * * Return void */ void __qdf_nbuf_mod_exit(void) { } #endif