// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2012-2021, The Linux Foundation. All rights reserved. */ #include #include #include #include #include #include #include #include "ipa_i.h" #include "ipa_trace.h" #include "ipahal/ipahal.h" #include "ipahal/ipahal_fltrt.h" #define IPA_WAN_AGGR_PKT_CNT 1 #define IPA_WAN_NAPI_MAX_FRAMES (NAPI_WEIGHT / IPA_WAN_AGGR_PKT_CNT) #define IPA_WAN_PAGE_ORDER 3 #define IPA_LAN_AGGR_PKT_CNT 5 #define IPA_LAN_NAPI_MAX_FRAMES (NAPI_WEIGHT / IPA_LAN_AGGR_PKT_CNT) #define IPA_LAST_DESC_CNT 0xFFFF #define POLLING_INACTIVITY_RX 40 #define POLLING_MIN_SLEEP_RX 1010 #define POLLING_MAX_SLEEP_RX 1050 #define POLLING_INACTIVITY_TX 40 #define POLLING_MIN_SLEEP_TX 400 #define POLLING_MAX_SLEEP_TX 500 #define SUSPEND_MIN_SLEEP_RX 1000 #define SUSPEND_MAX_SLEEP_RX 1005 /* 8K less 1 nominal MTU (1500 bytes) rounded to units of KB */ #define IPA_MTU 1500 #define IPA_GENERIC_AGGR_BYTE_LIMIT 6 #define IPA_GENERIC_AGGR_TIME_LIMIT 500 /* 0.5msec */ #define IPA_GENERIC_AGGR_PKT_LIMIT 0 #define IPA_GSB_AGGR_BYTE_LIMIT 14 #define IPA_GSB_RX_BUFF_BASE_SZ 16384 #define IPA_GENERIC_RX_BUFF_BASE_SZ 8192 #define IPA_REAL_GENERIC_RX_BUFF_SZ(X) (SKB_DATA_ALIGN(\ (X) + NET_SKB_PAD) +\ SKB_DATA_ALIGN(sizeof(struct skb_shared_info))) #define IPA_GENERIC_RX_BUFF_SZ(X) ((X) -\ (IPA_REAL_GENERIC_RX_BUFF_SZ(X) - (X))) #define IPA_GENERIC_RX_BUFF_LIMIT (\ IPA_REAL_GENERIC_RX_BUFF_SZ(\ IPA_GENERIC_RX_BUFF_BASE_SZ) -\ IPA_GENERIC_RX_BUFF_BASE_SZ) /* less 1 nominal MTU (1500 bytes) rounded to units of KB */ #define IPA_ADJUST_AGGR_BYTE_LIMIT(X) (((X) - IPA_MTU)/1000) #define IPA_RX_BUFF_CLIENT_HEADROOM 256 #define IPA_WLAN_RX_POOL_SZ 100 #define IPA_WLAN_RX_POOL_SZ_LOW_WM 5 #define IPA_WLAN_RX_BUFF_SZ 2048 #define IPA_WLAN_COMM_RX_POOL_LOW 100 #define IPA_WLAN_COMM_RX_POOL_HIGH 900 #define IPA_ODU_RX_BUFF_SZ 2048 #define IPA_ODU_RX_POOL_SZ 64 #define IPA_ODL_RX_BUFF_SZ (16 * 1024) #define IPA_GSI_MAX_CH_LOW_WEIGHT 15 #define IPA_GSI_EVT_RING_INT_MODT (16) /* 0.5ms under 32KHz clock */ #define IPA_GSI_EVT_RING_INT_MODC (20) #define IPA_GSI_CH_20_WA_NUM_CH_TO_ALLOC 10 /* The below virtual channel cannot be used by any entity */ #define IPA_GSI_CH_20_WA_VIRT_CHAN 29 #define IPA_DEFAULT_SYS_YELLOW_WM 32 #define IPA_REPL_XFER_THRESH 20 #define IPA_REPL_XFER_MAX 36 #define IPA_TX_SEND_COMPL_NOP_DELAY_NS (2 * 1000 * 1000) #define IPA_APPS_BW_FOR_PM 700 #define IPA_SEND_MAX_DESC (20) #define IPA_EOT_THRESH 32 #define IPA_QMAP_ID_BYTE 0 #define IPA_TX_MAX_DESC (50) static struct sk_buff *ipa3_get_skb_ipa_rx(unsigned int len, gfp_t flags); static void ipa3_replenish_wlan_rx_cache(struct ipa3_sys_context *sys); static void ipa3_replenish_rx_cache(struct ipa3_sys_context *sys); static void ipa3_replenish_rx_work_func(struct work_struct *work); static void ipa3_fast_replenish_rx_cache(struct ipa3_sys_context *sys); static void ipa3_replenish_rx_page_cache(struct ipa3_sys_context *sys); static void ipa3_wq_page_repl(struct work_struct *work); static void ipa3_replenish_rx_page_recycle(struct ipa3_sys_context *sys); static struct ipa3_rx_pkt_wrapper *ipa3_alloc_rx_pkt_page(gfp_t flag, bool is_tmp_alloc); static void ipa3_wq_handle_rx(struct work_struct *work); static void ipa3_wq_rx_common(struct ipa3_sys_context *sys, struct gsi_chan_xfer_notify *notify); static void ipa3_rx_napi_chain(struct ipa3_sys_context *sys, struct gsi_chan_xfer_notify *notify, uint32_t num); static void ipa3_wlan_wq_rx_common(struct ipa3_sys_context *sys, struct gsi_chan_xfer_notify *notify); static int ipa3_assign_policy(struct ipa_sys_connect_params *in, struct ipa3_sys_context *sys); static void ipa3_cleanup_rx(struct ipa3_sys_context *sys); static void ipa3_wq_rx_avail(struct work_struct *work); static void ipa3_alloc_wlan_rx_common_cache(u32 size); static void ipa3_cleanup_wlan_rx_common_cache(void); static void ipa3_wq_repl_rx(struct work_struct *work); static void ipa3_dma_memcpy_notify(struct ipa3_sys_context *sys); static int ipa_gsi_setup_coal_def_channel(struct ipa_sys_connect_params *in, struct ipa3_ep_context *ep, struct ipa3_ep_context *coal_ep); static int ipa_gsi_setup_channel(struct ipa_sys_connect_params *in, struct ipa3_ep_context *ep); static int ipa_gsi_setup_event_ring(struct ipa3_ep_context *ep, u32 ring_size, gfp_t mem_flag); static int ipa_gsi_setup_transfer_ring(struct ipa3_ep_context *ep, u32 ring_size, struct ipa3_sys_context *user_data, gfp_t mem_flag); static int ipa3_teardown_coal_def_pipe(u32 clnt_hdl); static int ipa_populate_tag_field(struct ipa3_desc *desc, struct ipa3_tx_pkt_wrapper *tx_pkt, struct ipahal_imm_cmd_pyld **tag_pyld_ret); static int ipa_poll_gsi_pkt(struct ipa3_sys_context *sys, struct gsi_chan_xfer_notify *notify); static int ipa_poll_gsi_n_pkt(struct ipa3_sys_context *sys, struct gsi_chan_xfer_notify *notify, int expected_num, int *actual_num); static unsigned long tag_to_pointer_wa(uint64_t tag); static uint64_t pointer_to_tag_wa(struct ipa3_tx_pkt_wrapper *tx_pkt); static u32 ipa_adjust_ra_buff_base_sz(u32 aggr_byte_limit); static void ipa3_wq_write_done_common(struct ipa3_sys_context *sys, struct ipa3_tx_pkt_wrapper *tx_pkt) { struct ipa3_tx_pkt_wrapper *next_pkt; int i, cnt; if (unlikely(tx_pkt == NULL)) { IPAERR("tx_pkt is NULL\n"); return; } cnt = tx_pkt->cnt; IPADBG_LOW("cnt: %d\n", cnt); for (i = 0; i < cnt; i++) { spin_lock_bh(&sys->spinlock); if (unlikely(list_empty(&sys->head_desc_list))) { spin_unlock_bh(&sys->spinlock); return; } next_pkt = list_next_entry(tx_pkt, link); list_del(&tx_pkt->link); sys->len--; spin_unlock_bh(&sys->spinlock); if (!tx_pkt->no_unmap_dma) { if (tx_pkt->type != IPA_DATA_DESC_SKB_PAGED) { dma_unmap_single(ipa3_ctx->pdev, tx_pkt->mem.phys_base, tx_pkt->mem.size, DMA_TO_DEVICE); } else { dma_unmap_page(ipa3_ctx->pdev, tx_pkt->mem.phys_base, tx_pkt->mem.size, DMA_TO_DEVICE); } } if (tx_pkt->callback) tx_pkt->callback(tx_pkt->user1, tx_pkt->user2); kmem_cache_free(ipa3_ctx->tx_pkt_wrapper_cache, tx_pkt); tx_pkt = next_pkt; } } static void ipa3_wq_write_done_status(int src_pipe, struct ipa3_tx_pkt_wrapper *tx_pkt) { struct ipa3_sys_context *sys; WARN_ON(src_pipe >= ipa3_ctx->ipa_num_pipes); if (!ipa3_ctx->ep[src_pipe].status.status_en) return; sys = ipa3_ctx->ep[src_pipe].sys; if (!sys) return; ipa3_wq_write_done_common(sys, tx_pkt); } static void ipa3_tasklet_schd_work(struct work_struct *work) { struct ipa3_sys_context *sys; sys = container_of(work, struct ipa3_sys_context, tasklet_work); if (atomic_read(&sys->xmit_eot_cnt)) tasklet_schedule(&sys->tasklet); } /** * ipa_write_done() - this function will be (eventually) called when a Tx * operation is complete * @data: user pointer point to the ipa3_sys_context * * Will be called in deferred context. * - invoke the callback supplied by the client who sent this command * - iterate over all packets and validate that * the order for sent packet is the same as expected * - delete all the tx packet descriptors from the system * pipe context (not needed anymore) */ static void ipa3_tasklet_write_done(unsigned long data) { struct ipa3_sys_context *sys; struct ipa3_tx_pkt_wrapper *this_pkt; bool xmit_done = false; unsigned int max_tx_pkt = 0; sys = (struct ipa3_sys_context *)data; spin_lock_bh(&sys->spinlock); while (atomic_add_unless(&sys->xmit_eot_cnt, -1, 0)) { while (!list_empty(&sys->head_desc_list)) { this_pkt = list_first_entry(&sys->head_desc_list, struct ipa3_tx_pkt_wrapper, link); xmit_done = this_pkt->xmit_done; spin_unlock_bh(&sys->spinlock); ipa3_wq_write_done_common(sys, this_pkt); spin_lock_bh(&sys->spinlock); max_tx_pkt++; if (xmit_done) break; } /* If TX packets processing continuously in tasklet other * softirqs are not able to run on that core which is leading * to watchdog bark. For avoiding these scenarios exit from * tasklet after reaching max limit. */ if (max_tx_pkt >= IPA_TX_MAX_DESC) break; } spin_unlock_bh(&sys->spinlock); if (max_tx_pkt >= IPA_TX_MAX_DESC) queue_work(sys->tasklet_wq, &sys->tasklet_work); } static void ipa3_send_nop_desc(struct work_struct *work) { struct ipa3_sys_context *sys = container_of(work, struct ipa3_sys_context, work); struct gsi_xfer_elem nop_xfer; struct ipa3_tx_pkt_wrapper *tx_pkt; IPADBG_LOW("gsi send NOP for ch: %lu\n", sys->ep->gsi_chan_hdl); if (atomic_read(&sys->workqueue_flushed)) return; tx_pkt = kmem_cache_zalloc(ipa3_ctx->tx_pkt_wrapper_cache, GFP_KERNEL); if (!tx_pkt) { queue_work(sys->wq, &sys->work); return; } INIT_LIST_HEAD(&tx_pkt->link); tx_pkt->cnt = 1; tx_pkt->no_unmap_dma = true; tx_pkt->sys = sys; spin_lock_bh(&sys->spinlock); if (unlikely(!sys->nop_pending)) { spin_unlock_bh(&sys->spinlock); kmem_cache_free(ipa3_ctx->tx_pkt_wrapper_cache, tx_pkt); return; } list_add_tail(&tx_pkt->link, &sys->head_desc_list); memset(&nop_xfer, 0, sizeof(nop_xfer)); nop_xfer.type = GSI_XFER_ELEM_NOP; nop_xfer.flags = GSI_XFER_FLAG_EOT; nop_xfer.xfer_user_data = tx_pkt; if (gsi_queue_xfer(sys->ep->gsi_chan_hdl, 1, &nop_xfer, true)) { list_del(&tx_pkt->link); kmem_cache_free(ipa3_ctx->tx_pkt_wrapper_cache, tx_pkt); spin_unlock_bh(&sys->spinlock); IPAERR("gsi_queue_xfer for ch:%lu failed\n", sys->ep->gsi_chan_hdl); queue_work(sys->wq, &sys->work); return; } sys->nop_pending = false; spin_unlock_bh(&sys->spinlock); /* make sure TAG process is sent before clocks are gated */ ipa3_ctx->tag_process_before_gating = true; } /** * ipa3_send() - Send multiple descriptors in one HW transaction * @sys: system pipe context * @num_desc: number of packets * @desc: packets to send (may be immediate command or data) * @in_atomic: whether caller is in atomic context * * This function is used for GPI connection. * - ipa3_tx_pkt_wrapper will be used for each ipa * descriptor (allocated from wrappers cache) * - The wrapper struct will be configured for each ipa-desc payload and will * contain information which will be later used by the user callbacks * - Each packet (command or data) that will be sent will also be saved in * ipa3_sys_context for later check that all data was sent * * Return codes: 0: success, -EFAULT: failure */ int ipa3_send(struct ipa3_sys_context *sys, u32 num_desc, struct ipa3_desc *desc, bool in_atomic) { struct ipa3_tx_pkt_wrapper *tx_pkt, *tx_pkt_first = NULL; struct ipahal_imm_cmd_pyld *tag_pyld_ret = NULL; struct ipa3_tx_pkt_wrapper *next_pkt; struct gsi_xfer_elem gsi_xfer[IPA_SEND_MAX_DESC]; int i = 0; int j; int result; u32 mem_flag = GFP_ATOMIC; const struct ipa_gsi_ep_config *gsi_ep_cfg; bool send_nop = false; unsigned int max_desc; if (unlikely(!in_atomic)) mem_flag = GFP_KERNEL; gsi_ep_cfg = ipa3_get_gsi_ep_info(sys->ep->client); if (unlikely(!gsi_ep_cfg)) { IPAERR("failed to get gsi EP config for client=%d\n", sys->ep->client); return -EFAULT; } if (unlikely(num_desc > IPA_SEND_MAX_DESC)) { IPAERR("max descriptors reached need=%d max=%d\n", num_desc, IPA_SEND_MAX_DESC); WARN_ON(1); return -EPERM; } max_desc = gsi_ep_cfg->ipa_if_tlv; if (gsi_ep_cfg->prefetch_mode == GSI_SMART_PRE_FETCH || gsi_ep_cfg->prefetch_mode == GSI_FREE_PRE_FETCH) max_desc -= gsi_ep_cfg->prefetch_threshold; if (unlikely(num_desc > max_desc)) { IPAERR("Too many chained descriptors need=%d max=%d\n", num_desc, max_desc); WARN_ON(1); return -EPERM; } /* initialize only the xfers we use */ memset(gsi_xfer, 0, sizeof(gsi_xfer[0]) * num_desc); spin_lock_bh(&sys->spinlock); if (unlikely(atomic_read(&sys->ep->disconnect_in_progress))) { IPAERR("Pipe disconnect in progress dropping the packet\n"); spin_unlock_bh(&sys->spinlock); return -EFAULT; } for (i = 0; i < num_desc; i++) { tx_pkt = kmem_cache_zalloc(ipa3_ctx->tx_pkt_wrapper_cache, GFP_ATOMIC); if (unlikely(!tx_pkt)) { IPAERR("failed to alloc tx wrapper\n"); result = -ENOMEM; goto failure; } INIT_LIST_HEAD(&tx_pkt->link); if (i == 0) { tx_pkt_first = tx_pkt; tx_pkt->cnt = num_desc; } /* populate tag field */ if (desc[i].is_tag_status) { if (unlikely(ipa_populate_tag_field(&desc[i], tx_pkt, &tag_pyld_ret))) { IPAERR("Failed to populate tag field\n"); result = -EFAULT; goto failure_dma_map; } } tx_pkt->type = desc[i].type; if (desc[i].type != IPA_DATA_DESC_SKB_PAGED) { tx_pkt->mem.base = desc[i].pyld; tx_pkt->mem.size = desc[i].len; if (!desc[i].dma_address_valid) { tx_pkt->mem.phys_base = dma_map_single(ipa3_ctx->pdev, tx_pkt->mem.base, tx_pkt->mem.size, DMA_TO_DEVICE); } else { tx_pkt->mem.phys_base = desc[i].dma_address; tx_pkt->no_unmap_dma = true; } } else { tx_pkt->mem.base = desc[i].frag; tx_pkt->mem.size = desc[i].len; if (!desc[i].dma_address_valid) { tx_pkt->mem.phys_base = skb_frag_dma_map(ipa3_ctx->pdev, desc[i].frag, 0, tx_pkt->mem.size, DMA_TO_DEVICE); } else { tx_pkt->mem.phys_base = desc[i].dma_address; tx_pkt->no_unmap_dma = true; } } if (unlikely(dma_mapping_error(ipa3_ctx->pdev, tx_pkt->mem.phys_base))) { IPAERR("failed to do dma map.\n"); result = -EFAULT; goto failure_dma_map; } tx_pkt->sys = sys; tx_pkt->callback = desc[i].callback; tx_pkt->user1 = desc[i].user1; tx_pkt->user2 = desc[i].user2; tx_pkt->xmit_done = false; list_add_tail(&tx_pkt->link, &sys->head_desc_list); gsi_xfer[i].addr = tx_pkt->mem.phys_base; /* * Special treatment for immediate commands, where * the structure of the descriptor is different */ if (desc[i].type == IPA_IMM_CMD_DESC) { gsi_xfer[i].len = desc[i].opcode; gsi_xfer[i].type = GSI_XFER_ELEM_IMME_CMD; } else { gsi_xfer[i].len = desc[i].len; gsi_xfer[i].type = GSI_XFER_ELEM_DATA; } if (i == (num_desc - 1)) { if (!sys->use_comm_evt_ring || (sys->pkt_sent % IPA_EOT_THRESH == 0)) { gsi_xfer[i].flags |= GSI_XFER_FLAG_EOT; gsi_xfer[i].flags |= GSI_XFER_FLAG_BEI; } else { send_nop = true; } gsi_xfer[i].xfer_user_data = tx_pkt_first; } else { gsi_xfer[i].flags |= GSI_XFER_FLAG_CHAIN; } } IPADBG_LOW("ch:%lu queue xfer\n", sys->ep->gsi_chan_hdl); result = gsi_queue_xfer(sys->ep->gsi_chan_hdl, num_desc, gsi_xfer, true); if (unlikely(result != GSI_STATUS_SUCCESS)) { IPAERR_RL("GSI xfer failed.\n"); result = -EFAULT; goto failure; } if (send_nop && !sys->nop_pending) sys->nop_pending = true; else send_nop = false; sys->pkt_sent++; spin_unlock_bh(&sys->spinlock); /* set the timer for sending the NOP descriptor */ if (send_nop) { ktime_t time = ktime_set(0, IPA_TX_SEND_COMPL_NOP_DELAY_NS); IPADBG_LOW("scheduling timer for ch %lu\n", sys->ep->gsi_chan_hdl); hrtimer_start(&sys->db_timer, time, HRTIMER_MODE_REL); } /* make sure TAG process is sent before clocks are gated */ ipa3_ctx->tag_process_before_gating = true; return 0; failure_dma_map: kmem_cache_free(ipa3_ctx->tx_pkt_wrapper_cache, tx_pkt); failure: ipahal_destroy_imm_cmd(tag_pyld_ret); tx_pkt = tx_pkt_first; for (j = 0; j < i; j++) { next_pkt = list_next_entry(tx_pkt, link); list_del(&tx_pkt->link); if (!tx_pkt->no_unmap_dma) { if (desc[j].type != IPA_DATA_DESC_SKB_PAGED) { dma_unmap_single(ipa3_ctx->pdev, tx_pkt->mem.phys_base, tx_pkt->mem.size, DMA_TO_DEVICE); } else { dma_unmap_page(ipa3_ctx->pdev, tx_pkt->mem.phys_base, tx_pkt->mem.size, DMA_TO_DEVICE); } } kmem_cache_free(ipa3_ctx->tx_pkt_wrapper_cache, tx_pkt); tx_pkt = next_pkt; } spin_unlock_bh(&sys->spinlock); return result; } /** * ipa3_send_one() - Send a single descriptor * @sys: system pipe context * @desc: descriptor to send * @in_atomic: whether caller is in atomic context * * - Allocate tx_packet wrapper * - transfer data to the IPA * - after the transfer was done the SPS will * notify the sending user via ipa_sps_irq_comp_tx() * * Return codes: 0: success, -EFAULT: failure */ int ipa3_send_one(struct ipa3_sys_context *sys, struct ipa3_desc *desc, bool in_atomic) { return ipa3_send(sys, 1, desc, in_atomic); } /** * ipa3_transport_irq_cmd_ack - callback function which will be called by * the transport driver after an immediate command is complete. * @user1: pointer to the descriptor of the transfer * @user2: * * Complete the immediate commands completion object, this will release the * thread which waits on this completion object (ipa3_send_cmd()) */ static void ipa3_transport_irq_cmd_ack(void *user1, int user2) { struct ipa3_desc *desc = (struct ipa3_desc *)user1; if (WARN(!desc, "desc is NULL")) return; IPADBG_LOW("got ack for cmd=%d\n", desc->opcode); complete(&desc->xfer_done); } /** * ipa3_transport_irq_cmd_ack_free - callback function which will be * called by the transport driver after an immediate command is complete. * This function will also free the completion object once it is done. * @tag_comp: pointer to the completion object * @ignored: parameter not used * * Complete the immediate commands completion object, this will release the * thread which waits on this completion object (ipa3_send_cmd()) */ static void ipa3_transport_irq_cmd_ack_free(void *tag_comp, int ignored) { struct ipa3_tag_completion *comp = tag_comp; if (!comp) { IPAERR("comp is NULL\n"); return; } complete(&comp->comp); if (atomic_dec_return(&comp->cnt) == 0) kfree(comp); } /** * ipa3_send_cmd - send immediate commands * @num_desc: number of descriptors within the desc struct * @descr: descriptor structure * * Function will block till command gets ACK from IPA HW, caller needs * to free any resources it allocated after function returns * The callback in ipa3_desc should not be set by the caller * for this function. */ int ipa3_send_cmd(u16 num_desc, struct ipa3_desc *descr) { struct ipa3_desc *desc; int i, result = 0; struct ipa3_sys_context *sys; int ep_idx; for (i = 0; i < num_desc; i++) IPADBG("sending imm cmd %d\n", descr[i].opcode); ep_idx = ipa3_get_ep_mapping(IPA_CLIENT_APPS_CMD_PROD); if (-1 == ep_idx) { IPAERR("Client %u is not mapped\n", IPA_CLIENT_APPS_CMD_PROD); return -EFAULT; } sys = ipa3_ctx->ep[ep_idx].sys; IPA_ACTIVE_CLIENTS_INC_SIMPLE(); if (num_desc == 1) { init_completion(&descr->xfer_done); if (descr->callback || descr->user1) WARN_ON(1); descr->callback = ipa3_transport_irq_cmd_ack; descr->user1 = descr; if (ipa3_send_one(sys, descr, true)) { IPAERR("fail to send immediate command\n"); result = -EFAULT; goto bail; } wait_for_completion(&descr->xfer_done); } else { desc = &descr[num_desc - 1]; init_completion(&desc->xfer_done); if (desc->callback || desc->user1) WARN_ON(1); desc->callback = ipa3_transport_irq_cmd_ack; desc->user1 = desc; if (ipa3_send(sys, num_desc, descr, true)) { IPAERR("fail to send multiple immediate command set\n"); result = -EFAULT; goto bail; } wait_for_completion(&desc->xfer_done); } bail: IPA_ACTIVE_CLIENTS_DEC_SIMPLE(); return result; } /** * ipa3_send_cmd_timeout - send immediate commands with limited time * waiting for ACK from IPA HW * @num_desc: number of descriptors within the desc struct * @descr: descriptor structure * @timeout: millisecond to wait till get ACK from IPA HW * * Function will block till command gets ACK from IPA HW or timeout. * Caller needs to free any resources it allocated after function returns * The callback in ipa3_desc should not be set by the caller * for this function. */ int ipa3_send_cmd_timeout(u16 num_desc, struct ipa3_desc *descr, u32 timeout) { struct ipa3_desc *desc; int i, result = 0; struct ipa3_sys_context *sys; int ep_idx; int completed; struct ipa3_tag_completion *comp; for (i = 0; i < num_desc; i++) IPADBG("sending imm cmd %d\n", descr[i].opcode); ep_idx = ipa3_get_ep_mapping(IPA_CLIENT_APPS_CMD_PROD); if (-1 == ep_idx) { IPAERR("Client %u is not mapped\n", IPA_CLIENT_APPS_CMD_PROD); return -EFAULT; } comp = kzalloc(sizeof(*comp), GFP_ATOMIC); if (!comp) return -ENOMEM; init_completion(&comp->comp); /* completion needs to be released from both here and in ack callback */ atomic_set(&comp->cnt, 2); sys = ipa3_ctx->ep[ep_idx].sys; if (num_desc == 1) { if (descr->callback || descr->user1) WARN_ON(1); descr->callback = ipa3_transport_irq_cmd_ack_free; descr->user1 = comp; if (ipa3_send_one(sys, descr, true)) { IPAERR("fail to send immediate command\n"); kfree(comp); result = -EFAULT; goto bail; } } else { desc = &descr[num_desc - 1]; if (desc->callback || desc->user1) WARN_ON(1); desc->callback = ipa3_transport_irq_cmd_ack_free; desc->user1 = comp; if (ipa3_send(sys, num_desc, descr, true)) { IPAERR("fail to send multiple immediate command set\n"); kfree(comp); result = -EFAULT; goto bail; } } completed = wait_for_completion_timeout( &comp->comp, msecs_to_jiffies(timeout)); if (!completed) { IPADBG("timeout waiting for imm-cmd ACK\n"); result = -EBUSY; } if (atomic_dec_return(&comp->cnt) == 0) kfree(comp); bail: return result; } /** * ipa3_handle_rx_core() - The core functionality of packet reception. This * function is read from multiple code paths. * * All the packets on the Rx data path are received on the IPA_A5_LAN_WAN_IN * endpoint. The function runs as long as there are packets in the pipe. * For each packet: * - Disconnect the packet from the system pipe linked list * - Unmap the packets skb, make it non DMAable * - Free the packet from the cache * - Prepare a proper skb * - Call the endpoints notify function, passing the skb in the parameters * - Replenish the rx cache */ static int ipa3_handle_rx_core(struct ipa3_sys_context *sys, bool process_all, bool in_poll_state) { int ret; int cnt = 0; struct gsi_chan_xfer_notify notify = { 0 }; while ((in_poll_state ? atomic_read(&sys->curr_polling_state) : !atomic_read(&sys->curr_polling_state))) { if (cnt && !process_all) break; ret = ipa_poll_gsi_pkt(sys, ¬ify); if (ret) break; if (IPA_CLIENT_IS_MEMCPY_DMA_CONS(sys->ep->client)) ipa3_dma_memcpy_notify(sys); else if (IPA_CLIENT_IS_WLAN_CONS(sys->ep->client)) ipa3_wlan_wq_rx_common(sys, ¬ify); else ipa3_wq_rx_common(sys, ¬ify); ++cnt; } return cnt; } /** * __ipa3_update_curr_poll_state -> update current polling for default wan and * coalescing pipe. * In RSC/RSB enabled cases using common event ring, so both the pipe * polling state should be in sync. */ void __ipa3_update_curr_poll_state(enum ipa_client_type client, int state) { int ep_idx = IPA_EP_NOT_ALLOCATED; if (client == IPA_CLIENT_APPS_WAN_COAL_CONS) ep_idx = ipa3_get_ep_mapping(IPA_CLIENT_APPS_WAN_CONS); if (client == IPA_CLIENT_APPS_WAN_CONS) ep_idx = ipa3_get_ep_mapping(IPA_CLIENT_APPS_WAN_COAL_CONS); if (ep_idx != IPA_EP_NOT_ALLOCATED && ipa3_ctx->ep[ep_idx].sys) atomic_set(&ipa3_ctx->ep[ep_idx].sys->curr_polling_state, state); } /** * ipa3_rx_switch_to_intr_mode() - Operate the Rx data path in interrupt mode */ static int ipa3_rx_switch_to_intr_mode(struct ipa3_sys_context *sys) { int ret; atomic_set(&sys->curr_polling_state, 0); __ipa3_update_curr_poll_state(sys->ep->client, 0); ipa_pm_deferred_deactivate(sys->pm_hdl); ipa3_dec_release_wakelock(); ret = gsi_config_channel_mode(sys->ep->gsi_chan_hdl, GSI_CHAN_MODE_CALLBACK); if ((ret != GSI_STATUS_SUCCESS) && !atomic_read(&sys->curr_polling_state)) { if (ret == -GSI_STATUS_PENDING_IRQ) { ipa3_inc_acquire_wakelock(); atomic_set(&sys->curr_polling_state, 1); __ipa3_update_curr_poll_state(sys->ep->client, 1); } else { IPAERR("Failed to switch to intr mode %d ch_id %d\n", sys->curr_polling_state, sys->ep->gsi_chan_hdl); } } return ret; } /** * ipa3_handle_rx() - handle packet reception. This function is executed in the * context of a work queue. * @work: work struct needed by the work queue * * ipa3_handle_rx_core() is run in polling mode. After all packets has been * received, the driver switches back to interrupt mode. */ static void ipa3_handle_rx(struct ipa3_sys_context *sys) { int inactive_cycles; int cnt; int ret; start_poll: ipa_pm_activate_sync(sys->pm_hdl); inactive_cycles = 0; do { cnt = ipa3_handle_rx_core(sys, true, true); if (cnt == 0) inactive_cycles++; else inactive_cycles = 0; trace_idle_sleep_enter3(sys->ep->client); usleep_range(POLLING_MIN_SLEEP_RX, POLLING_MAX_SLEEP_RX); trace_idle_sleep_exit3(sys->ep->client); /* * if pipe is out of buffers there is no point polling for * completed descs; release the worker so delayed work can * run in a timely manner */ if (sys->len == 0) break; } while (inactive_cycles <= POLLING_INACTIVITY_RX); trace_poll_to_intr3(sys->ep->client); ret = ipa3_rx_switch_to_intr_mode(sys); if (ret == -GSI_STATUS_PENDING_IRQ) goto start_poll; IPA_ACTIVE_CLIENTS_DEC_EP(sys->ep->client); } static void ipa3_switch_to_intr_rx_work_func(struct work_struct *work) { struct delayed_work *dwork; struct ipa3_sys_context *sys; dwork = container_of(work, struct delayed_work, work); sys = container_of(dwork, struct ipa3_sys_context, switch_to_intr_work); if (sys->napi_obj) { /* interrupt mode is done in ipa3_rx_poll context */ ipa_assert(); } else ipa3_handle_rx(sys); } enum hrtimer_restart ipa3_ring_doorbell_timer_fn(struct hrtimer *param) { struct ipa3_sys_context *sys = container_of(param, struct ipa3_sys_context, db_timer); queue_work(sys->wq, &sys->work); return HRTIMER_NORESTART; } static void ipa_pm_sys_pipe_cb(void *p, enum ipa_pm_cb_event event) { struct ipa3_sys_context *sys = (struct ipa3_sys_context *)p; switch (event) { case IPA_PM_CLIENT_ACTIVATED: /* * this event is ignored as the sync version of activation * will be used. */ break; case IPA_PM_REQUEST_WAKEUP: /* * pipe will be unsuspended as part of * enabling IPA clocks */ IPADBG("calling wakeup for client %d\n", sys->ep->client); if (sys->ep->client == IPA_CLIENT_APPS_WAN_CONS) { IPA_ACTIVE_CLIENTS_INC_SPECIAL("PIPE_SUSPEND_WAN"); usleep_range(SUSPEND_MIN_SLEEP_RX, SUSPEND_MAX_SLEEP_RX); IPA_ACTIVE_CLIENTS_DEC_SPECIAL("PIPE_SUSPEND_WAN"); } else if (sys->ep->client == IPA_CLIENT_APPS_LAN_CONS) { IPA_ACTIVE_CLIENTS_INC_SPECIAL("PIPE_SUSPEND_LAN"); usleep_range(SUSPEND_MIN_SLEEP_RX, SUSPEND_MAX_SLEEP_RX); IPA_ACTIVE_CLIENTS_DEC_SPECIAL("PIPE_SUSPEND_LAN"); } else if (sys->ep->client == IPA_CLIENT_ODL_DPL_CONS) { IPA_ACTIVE_CLIENTS_INC_SPECIAL("PIPE_SUSPEND_ODL"); usleep_range(SUSPEND_MIN_SLEEP_RX, SUSPEND_MAX_SLEEP_RX); IPA_ACTIVE_CLIENTS_DEC_SPECIAL("PIPE_SUSPEND_ODL"); } else if (sys->ep->client == IPA_CLIENT_APPS_WAN_COAL_CONS) { IPA_ACTIVE_CLIENTS_INC_SPECIAL("PIPE_SUSPEND_COAL"); usleep_range(SUSPEND_MIN_SLEEP_RX, SUSPEND_MAX_SLEEP_RX); IPA_ACTIVE_CLIENTS_DEC_SPECIAL("PIPE_SUSPEND_COAL"); } else IPAERR("Unexpected event %d\n for client %d\n", event, sys->ep->client); break; default: IPAERR("Unexpected event %d\n for client %d\n", event, sys->ep->client); WARN_ON(1); return; } } /** * ipa3_setup_sys_pipe() - Setup an IPA GPI pipe and perform * IPA EP configuration * @sys_in: [in] input needed to setup the pipe and configure EP * @clnt_hdl: [out] client handle * * - configure the end-point registers with the supplied * parameters from the user. * - Creates a GPI connection with IPA. * - allocate descriptor FIFO * * Returns: 0 on success, negative on failure */ int ipa3_setup_sys_pipe(struct ipa_sys_connect_params *sys_in, u32 *clnt_hdl) { struct ipa3_ep_context *ep; int i, ipa_ep_idx, wan_handle, coal_ep_id; int result = -EINVAL; struct ipahal_reg_coal_qmap_cfg qmap_cfg; struct ipahal_reg_coal_evict_lru evict_lru; char buff[IPA_RESOURCE_NAME_MAX]; struct ipa_ep_cfg ep_cfg_copy; if (sys_in == NULL || clnt_hdl == NULL) { IPAERR("NULL args\n"); goto fail_gen; } if (sys_in->client >= IPA_CLIENT_MAX || sys_in->desc_fifo_sz == 0) { IPAERR("bad parm client:%d fifo_sz:%d\n", sys_in->client, sys_in->desc_fifo_sz); goto fail_gen; } ipa_ep_idx = ipa3_get_ep_mapping(sys_in->client); if (ipa_ep_idx == IPA_EP_NOT_ALLOCATED) { IPAERR("Invalid client.\n"); goto fail_gen; } ep = &ipa3_ctx->ep[ipa_ep_idx]; if (ep->valid == 1) { IPAERR("EP %d already allocated.\n", ipa_ep_idx); goto fail_gen; } coal_ep_id = ipa3_get_ep_mapping(IPA_CLIENT_APPS_WAN_COAL_CONS); /* save the input config parameters */ if (sys_in->client == IPA_CLIENT_APPS_WAN_COAL_CONS) ep_cfg_copy = sys_in->ipa_ep_cfg; IPA_ACTIVE_CLIENTS_INC_EP(sys_in->client); memset(ep, 0, offsetof(struct ipa3_ep_context, sys)); if (!ep->sys) { struct ipa_pm_register_params pm_reg; memset(&pm_reg, 0, sizeof(pm_reg)); ep->sys = kzalloc(sizeof(struct ipa3_sys_context), GFP_KERNEL); if (!ep->sys) { IPAERR("failed to sys ctx for client %d\n", sys_in->client); result = -ENOMEM; goto fail_and_disable_clocks; } ep->sys->ep = ep; snprintf(buff, IPA_RESOURCE_NAME_MAX, "ipawq%d", sys_in->client); ep->sys->wq = alloc_workqueue(buff, WQ_MEM_RECLAIM | WQ_UNBOUND | WQ_SYSFS, 1); if (!ep->sys->wq) { IPAERR("failed to create wq for client %d\n", sys_in->client); result = -EFAULT; goto fail_wq; } snprintf(buff, IPA_RESOURCE_NAME_MAX, "iparepwq%d", sys_in->client); ep->sys->repl_wq = alloc_workqueue(buff, WQ_MEM_RECLAIM | WQ_UNBOUND | WQ_SYSFS, 1); if (!ep->sys->repl_wq) { IPAERR("failed to create rep wq for client %d\n", sys_in->client); result = -EFAULT; goto fail_wq2; } snprintf(buff, IPA_RESOURCE_NAME_MAX, "ipataskletwq%d", sys_in->client); ep->sys->tasklet_wq = alloc_workqueue(buff, WQ_MEM_RECLAIM | WQ_UNBOUND | WQ_SYSFS, 1); if (!ep->sys->tasklet_wq) { IPAERR("failed to create rep wq for client %d\n", sys_in->client); result = -EFAULT; goto fail_wq3; } INIT_LIST_HEAD(&ep->sys->head_desc_list); INIT_LIST_HEAD(&ep->sys->rcycl_list); spin_lock_init(&ep->sys->spinlock); hrtimer_init(&ep->sys->db_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); ep->sys->db_timer.function = ipa3_ring_doorbell_timer_fn; /* create IPA PM resources for handling polling mode */ if (sys_in->client == IPA_CLIENT_APPS_WAN_CONS && coal_ep_id != IPA_EP_NOT_ALLOCATED && ipa3_ctx->ep[coal_ep_id].valid == 1) { /* Use coalescing pipe PM handle for default pipe also*/ ep->sys->pm_hdl = ipa3_ctx->ep[coal_ep_id].sys->pm_hdl; } else if (IPA_CLIENT_IS_CONS(sys_in->client)) { pm_reg.name = ipa_clients_strings[sys_in->client]; pm_reg.callback = ipa_pm_sys_pipe_cb; pm_reg.user_data = ep->sys; pm_reg.group = IPA_PM_GROUP_APPS; result = ipa_pm_register(&pm_reg, &ep->sys->pm_hdl); if (result) { IPAERR("failed to create IPA PM client %d\n", result); goto fail_pm; } if (IPA_CLIENT_IS_APPS_CONS(sys_in->client)) { result = ipa_pm_associate_ipa_cons_to_client( ep->sys->pm_hdl, sys_in->client); if (result) { IPAERR("failed to associate\n"); goto fail_gen2; } } result = ipa_pm_set_throughput(ep->sys->pm_hdl, IPA_APPS_BW_FOR_PM); if (result) { IPAERR("failed to set profile IPA PM client\n"); goto fail_gen2; } } } else { memset(ep->sys, 0, offsetof(struct ipa3_sys_context, ep)); } atomic_set(&ep->sys->xmit_eot_cnt, 0); tasklet_init(&ep->sys->tasklet, ipa3_tasklet_write_done, (unsigned long) ep->sys); INIT_WORK(&ep->sys->tasklet_work, ipa3_tasklet_schd_work); ep->skip_ep_cfg = sys_in->skip_ep_cfg; if (ipa3_assign_policy(sys_in, ep->sys)) { IPAERR("failed to sys ctx for client %d\n", sys_in->client); result = -ENOMEM; goto fail_gen2; } ep->valid = 1; ep->client = sys_in->client; ep->client_notify = sys_in->notify; ep->sys->napi_obj = sys_in->napi_obj; ep->priv = sys_in->priv; ep->keep_ipa_awake = sys_in->keep_ipa_awake; atomic_set(&ep->avail_fifo_desc, ((sys_in->desc_fifo_sz / IPA_FIFO_ELEMENT_SIZE) - 1)); if (ep->status.status_en && IPA_CLIENT_IS_CONS(ep->client) && ep->sys->status_stat == NULL) { ep->sys->status_stat = kzalloc(sizeof(struct ipa3_status_stats), GFP_KERNEL); if (!ep->sys->status_stat) goto fail_gen2; } if (!ep->skip_ep_cfg) { if (ipa3_cfg_ep(ipa_ep_idx, &sys_in->ipa_ep_cfg)) { IPAERR("fail to configure EP.\n"); goto fail_gen2; } if (ipa3_cfg_ep_status(ipa_ep_idx, &ep->status)) { IPAERR("fail to configure status of EP.\n"); goto fail_gen2; } IPADBG("ep %d configuration successful\n", ipa_ep_idx); } else { IPADBG("skipping ep %d configuration\n", ipa_ep_idx); } result = ipa_gsi_setup_channel(sys_in, ep); if (result) { IPAERR("Failed to setup GSI channel\n"); goto fail_gen2; } *clnt_hdl = ipa_ep_idx; if (ep->sys->repl_hdlr == ipa3_fast_replenish_rx_cache) { ep->sys->repl = kzalloc(sizeof(*ep->sys->repl), GFP_KERNEL); if (!ep->sys->repl) { IPAERR("failed to alloc repl for client %d\n", sys_in->client); result = -ENOMEM; goto fail_gen2; } atomic_set(&ep->sys->repl->pending, 0); ep->sys->repl->capacity = ep->sys->rx_pool_sz + 1; ep->sys->repl->cache = kcalloc(ep->sys->repl->capacity, sizeof(void *), GFP_KERNEL); if (!ep->sys->repl->cache) { IPAERR("ep=%d fail to alloc repl cache\n", ipa_ep_idx); ep->sys->repl_hdlr = ipa3_replenish_rx_cache; ep->sys->repl->capacity = 0; } else { atomic_set(&ep->sys->repl->head_idx, 0); atomic_set(&ep->sys->repl->tail_idx, 0); ipa3_wq_repl_rx(&ep->sys->repl_work); } } if (ep->sys->repl_hdlr == ipa3_replenish_rx_page_recycle) { ep->sys->page_recycle_repl = kzalloc( sizeof(*ep->sys->page_recycle_repl), GFP_KERNEL); if (!ep->sys->page_recycle_repl) { IPAERR("failed to alloc repl for client %d\n", sys_in->client); result = -ENOMEM; goto fail_gen2; } atomic_set(&ep->sys->page_recycle_repl->pending, 0); ep->sys->page_recycle_repl->capacity = (ep->sys->rx_pool_sz + 1) * 2; ep->sys->page_recycle_repl->cache = kcalloc(ep->sys->page_recycle_repl->capacity, sizeof(void *), GFP_KERNEL); atomic_set(&ep->sys->page_recycle_repl->head_idx, 0); atomic_set(&ep->sys->page_recycle_repl->tail_idx, 0); ep->sys->repl = kzalloc(sizeof(*ep->sys->repl), GFP_KERNEL); if (!ep->sys->repl) { IPAERR("failed to alloc repl for client %d\n", sys_in->client); result = -ENOMEM; goto fail_page_recycle_repl; } ep->sys->repl->capacity = (ep->sys->rx_pool_sz + 1); atomic_set(&ep->sys->repl->pending, 0); ep->sys->repl->cache = kcalloc(ep->sys->repl->capacity, sizeof(void *), GFP_KERNEL); atomic_set(&ep->sys->repl->head_idx, 0); atomic_set(&ep->sys->repl->tail_idx, 0); ipa3_replenish_rx_page_cache(ep->sys); ipa3_wq_page_repl(&ep->sys->repl_work); } if (IPA_CLIENT_IS_CONS(sys_in->client)) { if (IPA_CLIENT_IS_WAN_CONS(sys_in->client) && ipa3_ctx->ipa_wan_skb_page) { ipa3_replenish_rx_page_recycle(ep->sys); } else ipa3_replenish_rx_cache(ep->sys); for (i = 0; i < GSI_VEID_MAX; i++) INIT_LIST_HEAD(&ep->sys->pending_pkts[i]); } if (IPA_CLIENT_IS_WLAN_CONS(sys_in->client)) { ipa3_alloc_wlan_rx_common_cache(IPA_WLAN_COMM_RX_POOL_LOW); atomic_inc(&ipa3_ctx->wc_memb.active_clnt_cnt); } ipa3_ctx->skip_ep_cfg_shadow[ipa_ep_idx] = ep->skip_ep_cfg; if (!ep->skip_ep_cfg && IPA_CLIENT_IS_PROD(sys_in->client)) { if (ipa3_ctx->modem_cfg_emb_pipe_flt && sys_in->client == IPA_CLIENT_APPS_WAN_PROD) IPADBG("modem cfg emb pipe flt\n"); else ipa3_install_dflt_flt_rules(ipa_ep_idx); } result = ipa3_enable_data_path(ipa_ep_idx); if (result) { IPAERR("enable data path failed res=%d ep=%d.\n", result, ipa_ep_idx); goto fail_repl; } result = gsi_start_channel(ep->gsi_chan_hdl); if (result != GSI_STATUS_SUCCESS) { IPAERR("gsi_start_channel failed res=%d ep=%d.\n", result, ipa_ep_idx); goto fail_gen3; } IPADBG("client %d (ep: %d) connected sys=%pK\n", sys_in->client, ipa_ep_idx, ep->sys); /* configure the registers and setup the default pipe */ if (sys_in->client == IPA_CLIENT_APPS_WAN_COAL_CONS) { evict_lru.coal_vp_lru_thrshld = 0; evict_lru.coal_eviction_en = true; ipahal_write_reg_fields(IPA_COAL_EVICT_LRU, &evict_lru); qmap_cfg.mux_id_byte_sel = IPA_QMAP_ID_BYTE; ipahal_write_reg_fields(IPA_COAL_QMAP_CFG, &qmap_cfg); sys_in->client = IPA_CLIENT_APPS_WAN_CONS; sys_in->ipa_ep_cfg = ep_cfg_copy; result = ipa3_setup_sys_pipe(sys_in, &wan_handle); if (result) { IPAERR("failed to setup default coalescing pipe\n"); goto fail_repl; } } if (!ep->keep_ipa_awake) IPA_ACTIVE_CLIENTS_DEC_EP(ep->client); return 0; fail_gen3: ipa3_disable_data_path(ipa_ep_idx); fail_repl: ep->sys->repl_hdlr = ipa3_replenish_rx_cache; ep->sys->repl->capacity = 0; kfree(ep->sys->repl); ep->sys->repl = NULL; fail_page_recycle_repl: if (ep->sys->page_recycle_repl) { ep->sys->page_recycle_repl->capacity = 0; kfree(ep->sys->page_recycle_repl); ep->sys->page_recycle_repl = NULL; } fail_gen2: ipa_pm_deregister(ep->sys->pm_hdl); fail_pm: destroy_workqueue(ep->sys->tasklet_wq); fail_wq3: destroy_workqueue(ep->sys->repl_wq); fail_wq2: destroy_workqueue(ep->sys->wq); fail_wq: kfree(ep->sys); memset(&ipa3_ctx->ep[ipa_ep_idx], 0, sizeof(struct ipa3_ep_context)); fail_and_disable_clocks: IPA_ACTIVE_CLIENTS_DEC_EP(sys_in->client); fail_gen: return result; } /** * ipa3_teardown_sys_pipe() - Teardown the GPI pipe and cleanup IPA EP * @clnt_hdl: [in] the handle obtained from ipa3_setup_sys_pipe * * Returns: 0 on success, negative on failure */ int ipa3_teardown_sys_pipe(u32 clnt_hdl) { struct ipa3_ep_context *ep; int empty; int result; int i; if (clnt_hdl >= ipa3_ctx->ipa_num_pipes || ipa3_ctx->ep[clnt_hdl].valid == 0) { IPAERR("bad parm.\n"); return -EINVAL; } ep = &ipa3_ctx->ep[clnt_hdl]; if (!ep->keep_ipa_awake) IPA_ACTIVE_CLIENTS_INC_EP(ipa3_get_client_mapping(clnt_hdl)); ipa3_disable_data_path(clnt_hdl); if (IPA_CLIENT_IS_PROD(ep->client)) { do { spin_lock_bh(&ep->sys->spinlock); atomic_set(&ep->disconnect_in_progress, 1); empty = list_empty(&ep->sys->head_desc_list); spin_unlock_bh(&ep->sys->spinlock); if (!empty) usleep_range(95, 105); else break; } while (1); } /* channel stop might fail on timeout if IPA is busy */ for (i = 0; i < IPA_GSI_CHANNEL_STOP_MAX_RETRY; i++) { result = ipa3_stop_gsi_channel(clnt_hdl); if (result == GSI_STATUS_SUCCESS) break; if (result != -GSI_STATUS_AGAIN && result != -GSI_STATUS_TIMED_OUT) break; } if (result != GSI_STATUS_SUCCESS) { IPAERR("GSI stop chan err: %d.\n", result); ipa_assert(); return result; } do { usleep_range(95, 105); } while (atomic_read(&ep->sys->curr_polling_state)); if (IPA_CLIENT_IS_CONS(ep->client)) cancel_delayed_work_sync(&ep->sys->replenish_rx_work); flush_workqueue(ep->sys->wq); if (IPA_CLIENT_IS_PROD(ep->client)) atomic_set(&ep->sys->workqueue_flushed, 1); /* tear down the default pipe before we reset the channel*/ if (ep->client == IPA_CLIENT_APPS_WAN_COAL_CONS) { i = ipa3_get_ep_mapping(IPA_CLIENT_APPS_WAN_CONS); if (i == IPA_EP_NOT_ALLOCATED) { IPAERR("failed to get idx"); return i; } result = ipa3_teardown_coal_def_pipe(i); if (result) { IPAERR("failed to teardown default coal pipe\n"); return result; } } result = ipa3_reset_gsi_channel(clnt_hdl); if (result != GSI_STATUS_SUCCESS) { IPAERR("Failed to reset chan: %d.\n", result); ipa_assert(); return result; } dma_free_coherent(ipa3_ctx->pdev, ep->gsi_mem_info.chan_ring_len, ep->gsi_mem_info.chan_ring_base_vaddr, ep->gsi_mem_info.chan_ring_base_addr); result = gsi_dealloc_channel(ep->gsi_chan_hdl); if (result != GSI_STATUS_SUCCESS) { IPAERR("Failed to dealloc chan: %d.\n", result); ipa_assert(); return result; } /* free event ring only when it is present */ if (ep->sys->use_comm_evt_ring) { ipa3_ctx->gsi_evt_comm_ring_rem += ep->gsi_mem_info.chan_ring_len; } else if (ep->gsi_evt_ring_hdl != ~0) { result = gsi_reset_evt_ring(ep->gsi_evt_ring_hdl); if (WARN(result != GSI_STATUS_SUCCESS, "reset evt %d", result)) return result; dma_free_coherent(ipa3_ctx->pdev, ep->gsi_mem_info.evt_ring_len, ep->gsi_mem_info.evt_ring_base_vaddr, ep->gsi_mem_info.evt_ring_base_addr); result = gsi_dealloc_evt_ring(ep->gsi_evt_ring_hdl); if (WARN(result != GSI_STATUS_SUCCESS, "deall evt %d", result)) return result; } if (ep->sys->repl_wq) flush_workqueue(ep->sys->repl_wq); if (ep->sys->tasklet_wq) flush_workqueue(ep->sys->tasklet_wq); if (IPA_CLIENT_IS_CONS(ep->client)) ipa3_cleanup_rx(ep->sys); if (!ep->skip_ep_cfg && IPA_CLIENT_IS_PROD(ep->client)) { if (ipa3_ctx->modem_cfg_emb_pipe_flt && ep->client == IPA_CLIENT_APPS_WAN_PROD) IPADBG("modem cfg emb pipe flt\n"); else ipa3_delete_dflt_flt_rules(clnt_hdl); } if (IPA_CLIENT_IS_WLAN_CONS(ep->client)) atomic_dec(&ipa3_ctx->wc_memb.active_clnt_cnt); memset(&ep->wstats, 0, sizeof(struct ipa3_wlan_stats)); if (!atomic_read(&ipa3_ctx->wc_memb.active_clnt_cnt)) ipa3_cleanup_wlan_rx_common_cache(); ep->valid = 0; IPA_ACTIVE_CLIENTS_DEC_EP(ipa3_get_client_mapping(clnt_hdl)); IPADBG("client (ep: %d) disconnected\n", clnt_hdl); return 0; } /** * ipa3_teardown_coal_def_pipe() - Teardown the APPS_WAN_COAL_CONS * default GPI pipe and cleanup IPA EP * called after the coalesced pipe is destroyed. * @clnt_hdl: [in] the handle obtained from ipa3_setup_sys_pipe * * Returns: 0 on success, negative on failure */ static int ipa3_teardown_coal_def_pipe(u32 clnt_hdl) { struct ipa3_ep_context *ep; int result; int i; ep = &ipa3_ctx->ep[clnt_hdl]; ipa3_disable_data_path(clnt_hdl); /* channel stop might fail on timeout if IPA is busy */ for (i = 0; i < IPA_GSI_CHANNEL_STOP_MAX_RETRY; i++) { result = ipa3_stop_gsi_channel(clnt_hdl); if (result == GSI_STATUS_SUCCESS) break; if (result != -GSI_STATUS_AGAIN && result != -GSI_STATUS_TIMED_OUT) break; } if (result != GSI_STATUS_SUCCESS) { IPAERR("GSI stop chan err: %d.\n", result); ipa_assert(); return result; } result = ipa3_reset_gsi_channel(clnt_hdl); if (result != GSI_STATUS_SUCCESS) { IPAERR("Failed to reset chan: %d.\n", result); ipa_assert(); return result; } dma_free_coherent(ipa3_ctx->pdev, ep->gsi_mem_info.chan_ring_len, ep->gsi_mem_info.chan_ring_base_vaddr, ep->gsi_mem_info.chan_ring_base_addr); result = gsi_dealloc_channel(ep->gsi_chan_hdl); if (result != GSI_STATUS_SUCCESS) { IPAERR("Failed to dealloc chan: %d.\n", result); ipa_assert(); return result; } if (IPA_CLIENT_IS_CONS(ep->client)) cancel_delayed_work_sync(&ep->sys->replenish_rx_work); flush_workqueue(ep->sys->wq); if (ep->sys->repl_wq) flush_workqueue(ep->sys->repl_wq); if (IPA_CLIENT_IS_CONS(ep->client)) ipa3_cleanup_rx(ep->sys); ep->valid = 0; IPADBG("client (ep: %d) disconnected\n", clnt_hdl); return 0; } /** * ipa3_tx_comp_usr_notify_release() - Callback function which will call the * user supplied callback function to release the skb, or release it on * its own if no callback function was supplied. * @user1 * @user2 * * This notified callback is for the destination client. */ static void ipa3_tx_comp_usr_notify_release(void *user1, int user2) { struct sk_buff *skb = (struct sk_buff *)user1; int ep_idx = user2; IPADBG_LOW("skb=%pK ep=%d\n", skb, ep_idx); IPA_STATS_INC_CNT(ipa3_ctx->stats.tx_pkts_compl); if (ipa3_ctx->ep[ep_idx].client_notify) ipa3_ctx->ep[ep_idx].client_notify(ipa3_ctx->ep[ep_idx].priv, IPA_WRITE_DONE, (unsigned long)skb); else dev_kfree_skb_any(skb); } void ipa3_tx_cmd_comp(void *user1, int user2) { ipahal_destroy_imm_cmd(user1); } /** * ipa3_tx_dp() - Data-path tx handler * @dst: [in] which IPA destination to route tx packets to * @skb: [in] the packet to send * @metadata: [in] TX packet meta-data * * Data-path tx handler, this is used for both SW data-path which by-passes most * IPA HW blocks AND the regular HW data-path for WLAN AMPDU traffic only. If * dst is a "valid" CONS type, then SW data-path is used. If dst is the * WLAN_AMPDU PROD type, then HW data-path for WLAN AMPDU is used. Anything else * is an error. For errors, client needs to free the skb as needed. For success, * IPA driver will later invoke client callback if one was supplied. That * callback should free the skb. If no callback supplied, IPA driver will free * the skb internally * * The function will use two descriptors for this send command * (for A5_WLAN_AMPDU_PROD only one desciprtor will be sent), * the first descriptor will be used to inform the IPA hardware that * apps need to push data into the IPA (IP_PACKET_INIT immediate command). * Once this send was done from transport point-of-view the IPA driver will * get notified by the supplied callback. * * Returns: 0 on success, negative on failure */ int ipa3_tx_dp(enum ipa_client_type dst, struct sk_buff *skb, struct ipa_tx_meta *meta) { struct ipa3_desc *desc; struct ipa3_desc _desc[3]; int dst_ep_idx; struct ipahal_imm_cmd_pyld *cmd_pyld = NULL; struct ipa3_sys_context *sys; int src_ep_idx; int num_frags, f; const struct ipa_gsi_ep_config *gsi_ep; int data_idx; unsigned int max_desc; if (unlikely(!ipa3_ctx)) { IPAERR("IPA3 driver was not initialized\n"); return -EINVAL; } if (unlikely(skb->len == 0)) { IPAERR("packet size is 0\n"); return -EINVAL; } /* * USB_CONS: PKT_INIT ep_idx = dst pipe * Q6_CONS: PKT_INIT ep_idx = sender pipe * A5_LAN_WAN_PROD: HW path ep_idx = sender pipe * * LAN TX: all PKT_INIT * WAN TX: PKT_INIT (cmd) + HW (data) * */ if (IPA_CLIENT_IS_CONS(dst)) { src_ep_idx = ipa3_get_ep_mapping(IPA_CLIENT_APPS_LAN_PROD); if (unlikely(-1 == src_ep_idx)) { IPAERR("Client %u is not mapped\n", IPA_CLIENT_APPS_LAN_PROD); goto fail_gen; } dst_ep_idx = ipa3_get_ep_mapping(dst); } else { src_ep_idx = ipa3_get_ep_mapping(dst); if (unlikely(-1 == src_ep_idx)) { IPAERR("Client %u is not mapped\n", dst); goto fail_gen; } if (meta && meta->pkt_init_dst_ep_valid) dst_ep_idx = meta->pkt_init_dst_ep; else dst_ep_idx = -1; } sys = ipa3_ctx->ep[src_ep_idx].sys; if (unlikely(!sys || !sys->ep->valid)) { IPAERR_RL("pipe %d not valid\n", src_ep_idx); goto fail_pipe_not_valid; } num_frags = skb_shinfo(skb)->nr_frags; /* * make sure TLV FIFO supports the needed frags. * 2 descriptors are needed for IP_PACKET_INIT and TAG_STATUS. * 1 descriptor needed for the linear portion of skb. */ gsi_ep = ipa3_get_gsi_ep_info(ipa3_ctx->ep[src_ep_idx].client); if (unlikely(gsi_ep == NULL)) { IPAERR("failed to get EP %d GSI info\n", src_ep_idx); goto fail_gen; } max_desc = gsi_ep->ipa_if_tlv; if (gsi_ep->prefetch_mode == GSI_SMART_PRE_FETCH || gsi_ep->prefetch_mode == GSI_FREE_PRE_FETCH) max_desc -= gsi_ep->prefetch_threshold; if (num_frags + 3 > max_desc) { if (unlikely(skb_linearize(skb))) { IPAERR("Failed to linear skb with %d frags\n", num_frags); goto fail_gen; } num_frags = 0; } if (num_frags) { /* 1 desc for tag to resolve status out-of-order issue; * 1 desc is needed for the linear portion of skb; * 1 desc may be needed for the PACKET_INIT; * 1 desc for each frag */ desc = kzalloc(sizeof(*desc) * (num_frags + 3), GFP_ATOMIC); if (unlikely(!desc)) { IPAERR("failed to alloc desc array\n"); goto fail_gen; } } else { memset(_desc, 0, 3 * sizeof(struct ipa3_desc)); desc = &_desc[0]; } if (dst_ep_idx != -1) { int skb_idx; /* SW data path */ data_idx = 0; if (sys->policy == IPA_POLICY_NOINTR_MODE) { /* * For non-interrupt mode channel (where there is no * event ring) TAG STATUS are used for completion * notification. IPA will generate a status packet with * tag info as a result of the TAG STATUS command. */ desc[data_idx].is_tag_status = true; data_idx++; } desc[data_idx].opcode = ipa3_ctx->pkt_init_imm_opcode; desc[data_idx].dma_address_valid = true; desc[data_idx].dma_address = ipa3_ctx->pkt_init_imm[dst_ep_idx]; desc[data_idx].type = IPA_IMM_CMD_DESC; desc[data_idx].callback = NULL; data_idx++; desc[data_idx].pyld = skb->data; desc[data_idx].len = skb_headlen(skb); desc[data_idx].type = IPA_DATA_DESC_SKB; desc[data_idx].callback = ipa3_tx_comp_usr_notify_release; desc[data_idx].user1 = skb; desc[data_idx].user2 = (meta && meta->pkt_init_dst_ep_valid && meta->pkt_init_dst_ep_remote) ? src_ep_idx : dst_ep_idx; if (meta && meta->dma_address_valid) { desc[data_idx].dma_address_valid = true; desc[data_idx].dma_address = meta->dma_address; } skb_idx = data_idx; data_idx++; for (f = 0; f < num_frags; f++) { if (skb_frag_size(&skb_shinfo(skb)->frags[f]) != 0) { desc[data_idx].frag = &skb_shinfo(skb)->frags[f]; desc[data_idx].type = IPA_DATA_DESC_SKB_PAGED; desc[data_idx].len = skb_frag_size(desc[data_idx].frag); data_idx++; } else { IPAERR_RL("Received zero len SKB frag pkt\n"); IPA_STATS_INC_CNT( ipa3_ctx->stats.zero_len_frag_pkt_cnt); } } /* don't free skb till frag mappings are released */ if (num_frags) { desc[data_idx - 1].callback = desc[skb_idx].callback; desc[data_idx - 1].user1 = desc[skb_idx].user1; desc[data_idx - 1].user2 = desc[skb_idx].user2; desc[skb_idx].callback = NULL; } if (unlikely(ipa3_send(sys, data_idx, desc, true))) { IPAERR_RL("fail to send skb %pK num_frags %u SWP\n", skb, num_frags); goto fail_send; } IPA_STATS_INC_CNT(ipa3_ctx->stats.tx_sw_pkts); } else { /* HW data path */ data_idx = 0; if (sys->policy == IPA_POLICY_NOINTR_MODE) { /* * For non-interrupt mode channel (where there is no * event ring) TAG STATUS are used for completion * notification. IPA will generate a status packet with * tag info as a result of the TAG STATUS command. */ desc[data_idx].is_tag_status = true; data_idx++; } desc[data_idx].pyld = skb->data; desc[data_idx].len = skb_headlen(skb); desc[data_idx].type = IPA_DATA_DESC_SKB; desc[data_idx].callback = ipa3_tx_comp_usr_notify_release; desc[data_idx].user1 = skb; desc[data_idx].user2 = src_ep_idx; if (meta && meta->dma_address_valid) { desc[data_idx].dma_address_valid = true; desc[data_idx].dma_address = meta->dma_address; } if (num_frags == 0) { if (unlikely(ipa3_send(sys, data_idx + 1, desc, true))) { IPAERR("fail to send skb %pK HWP\n", skb); goto fail_mem; } } else { for (f = 0; f < num_frags; f++) { desc[data_idx+f+1].frag = &skb_shinfo(skb)->frags[f]; desc[data_idx+f+1].type = IPA_DATA_DESC_SKB_PAGED; desc[data_idx+f+1].len = skb_frag_size(desc[data_idx+f+1].frag); } /* don't free skb till frag mappings are released */ desc[data_idx+f].callback = desc[data_idx].callback; desc[data_idx+f].user1 = desc[data_idx].user1; desc[data_idx+f].user2 = desc[data_idx].user2; desc[data_idx].callback = NULL; if (unlikely(ipa3_send(sys, num_frags + data_idx + 1, desc, true))) { IPAERR("fail to send skb %pK num_frags %u\n", skb, num_frags); goto fail_mem; } } IPA_STATS_INC_CNT(ipa3_ctx->stats.tx_hw_pkts); } if (num_frags) { kfree(desc); IPA_STATS_INC_CNT(ipa3_ctx->stats.tx_non_linear); } return 0; fail_send: ipahal_destroy_imm_cmd(cmd_pyld); fail_mem: if (num_frags) kfree(desc); fail_gen: return -EFAULT; fail_pipe_not_valid: return -EPIPE; } static void ipa3_wq_handle_rx(struct work_struct *work) { struct ipa3_sys_context *sys; enum ipa_client_type client_type; sys = container_of(work, struct ipa3_sys_context, work); /* * Mark client as WAN_COAL_CONS only as * NAPI only use sys of WAN_COAL_CONS. */ if (IPA_CLIENT_IS_WAN_CONS(sys->ep->client)) client_type = IPA_CLIENT_APPS_WAN_COAL_CONS; else client_type = sys->ep->client; IPA_ACTIVE_CLIENTS_INC_EP(client_type); if (sys->napi_obj) { napi_schedule(sys->napi_obj); IPA_STATS_INC_CNT(sys->napi_sch_cnt); } else ipa3_handle_rx(sys); } static void ipa3_wq_repl_rx(struct work_struct *work) { struct ipa3_sys_context *sys; void *ptr; struct ipa3_rx_pkt_wrapper *rx_pkt; gfp_t flag = GFP_KERNEL; u32 next; u32 curr; sys = container_of(work, struct ipa3_sys_context, repl_work); atomic_set(&sys->repl->pending, 0); curr = atomic_read(&sys->repl->tail_idx); begin: while (1) { next = (curr + 1) % sys->repl->capacity; if (unlikely(next == atomic_read(&sys->repl->head_idx))) goto fail_kmem_cache_alloc; rx_pkt = kmem_cache_zalloc(ipa3_ctx->rx_pkt_wrapper_cache, flag); if (unlikely(!rx_pkt)) goto fail_kmem_cache_alloc; INIT_WORK(&rx_pkt->work, ipa3_wq_rx_avail); rx_pkt->sys = sys; rx_pkt->data.skb = sys->get_skb(sys->rx_buff_sz, flag); if (unlikely(rx_pkt->data.skb == NULL)) goto fail_skb_alloc; ptr = skb_put(rx_pkt->data.skb, sys->rx_buff_sz); rx_pkt->data.dma_addr = dma_map_single(ipa3_ctx->pdev, ptr, sys->rx_buff_sz, DMA_FROM_DEVICE); if (unlikely(dma_mapping_error(ipa3_ctx->pdev, rx_pkt->data.dma_addr))) { pr_err_ratelimited("%s dma map fail %pK for %pK sys=%pK\n", __func__, (void *)rx_pkt->data.dma_addr, ptr, sys); goto fail_dma_mapping; } sys->repl->cache[curr] = rx_pkt; curr = next; /* ensure write is done before setting tail index */ mb(); atomic_set(&sys->repl->tail_idx, next); } return; fail_dma_mapping: sys->free_skb(rx_pkt->data.skb); fail_skb_alloc: kmem_cache_free(ipa3_ctx->rx_pkt_wrapper_cache, rx_pkt); fail_kmem_cache_alloc: if (atomic_read(&sys->repl->tail_idx) == atomic_read(&sys->repl->head_idx)) { if (sys->ep->client == IPA_CLIENT_APPS_WAN_CONS || sys->ep->client == IPA_CLIENT_APPS_WAN_COAL_CONS) IPA_STATS_INC_CNT(ipa3_ctx->stats.wan_repl_rx_empty); else if (sys->ep->client == IPA_CLIENT_APPS_LAN_CONS) IPA_STATS_INC_CNT(ipa3_ctx->stats.lan_repl_rx_empty); pr_err_ratelimited("%s sys=%pK repl ring empty\n", __func__, sys); goto begin; } } static struct page *ipa3_alloc_page( gfp_t flag, u32 *page_order, bool try_lower) { struct page *page = NULL; u32 p_order = *page_order; page = __dev_alloc_pages(flag, p_order); /* We will only try 1 page order lower. */ if (unlikely(!page)) { if (try_lower && p_order > 0) { p_order = p_order - 1; page = __dev_alloc_pages(flag, p_order); if (likely(page)) ipa3_ctx->stats.lower_order++; } } *page_order = p_order; return page; } static struct ipa3_rx_pkt_wrapper *ipa3_alloc_rx_pkt_page( gfp_t flag, bool is_tmp_alloc) { struct ipa3_rx_pkt_wrapper *rx_pkt; flag |= __GFP_NOMEMALLOC; rx_pkt = kmem_cache_zalloc(ipa3_ctx->rx_pkt_wrapper_cache, flag); if (unlikely(!rx_pkt)) return NULL; rx_pkt->page_data.page_order = IPA_WAN_PAGE_ORDER; /* For temporary allocations, avoid triggering OOM Killer. */ if (is_tmp_alloc) flag |= __GFP_RETRY_MAYFAIL | __GFP_NOWARN; /* Try a lower order page for order 3 pages in case allocation fails. */ rx_pkt->page_data.page = ipa3_alloc_page(flag, &rx_pkt->page_data.page_order, (is_tmp_alloc && rx_pkt->page_data.page_order == 3)); if (unlikely(!rx_pkt->page_data.page)) goto fail_page_alloc; rx_pkt->len = PAGE_SIZE << rx_pkt->page_data.page_order; rx_pkt->page_data.dma_addr = dma_map_page(ipa3_ctx->pdev, rx_pkt->page_data.page, 0, rx_pkt->len, DMA_FROM_DEVICE); if (unlikely(dma_mapping_error(ipa3_ctx->pdev, rx_pkt->page_data.dma_addr))) { pr_err_ratelimited("%s dma map fail %pK for %pK\n", __func__, (void *)rx_pkt->page_data.dma_addr, rx_pkt->page_data.page); goto fail_dma_mapping; } if (is_tmp_alloc) rx_pkt->page_data.is_tmp_alloc = true; else rx_pkt->page_data.is_tmp_alloc = false; return rx_pkt; fail_dma_mapping: __free_pages(rx_pkt->page_data.page, rx_pkt->page_data.page_order); fail_page_alloc: kmem_cache_free(ipa3_ctx->rx_pkt_wrapper_cache, rx_pkt); return NULL; } static void ipa3_replenish_rx_page_cache(struct ipa3_sys_context *sys) { struct ipa3_rx_pkt_wrapper *rx_pkt; u32 curr; for (curr = 0; curr < sys->page_recycle_repl->capacity; curr++) { rx_pkt = ipa3_alloc_rx_pkt_page(GFP_KERNEL, false); if (unlikely(!rx_pkt)) { IPAERR("ipa3_alloc_rx_pkt_page fails\n"); ipa_assert(); break; } rx_pkt->sys = sys; sys->page_recycle_repl->cache[curr] = rx_pkt; } return; } static void ipa3_wq_page_repl(struct work_struct *work) { struct ipa3_sys_context *sys; struct ipa3_rx_pkt_wrapper *rx_pkt; u32 next; u32 curr; sys = container_of(work, struct ipa3_sys_context, repl_work); atomic_set(&sys->repl->pending, 0); curr = atomic_read(&sys->repl->tail_idx); begin: while (1) { next = (curr + 1) % sys->repl->capacity; if (unlikely(next == atomic_read(&sys->repl->head_idx))) goto fail_kmem_cache_alloc; rx_pkt = ipa3_alloc_rx_pkt_page(GFP_KERNEL, true); if (unlikely(!rx_pkt)) { IPAERR("ipa3_alloc_rx_pkt_page fails\n"); break; } rx_pkt->sys = sys; sys->repl->cache[curr] = rx_pkt; curr = next; /* ensure write is done before setting tail index */ mb(); atomic_set(&sys->repl->tail_idx, next); } return; fail_kmem_cache_alloc: if (atomic_read(&sys->repl->tail_idx) == atomic_read(&sys->repl->head_idx)) { if (sys->ep->client == IPA_CLIENT_APPS_WAN_CONS || sys->ep->client == IPA_CLIENT_APPS_WAN_COAL_CONS) IPA_STATS_INC_CNT(ipa3_ctx->stats.wan_repl_rx_empty); pr_err_ratelimited("%s sys=%pK wq_repl ring empty\n", __func__, sys); goto begin; } } static inline void __trigger_repl_work(struct ipa3_sys_context *sys) { int tail, head, avail; if (atomic_read(&sys->repl->pending)) return; tail = atomic_read(&sys->repl->tail_idx); head = atomic_read(&sys->repl->head_idx); avail = (tail - head) % sys->repl->capacity; if (avail < sys->repl->capacity / 4) { atomic_set(&sys->repl->pending, 1); queue_work(sys->repl_wq, &sys->repl_work); } } static void ipa3_replenish_rx_page_recycle(struct ipa3_sys_context *sys) { struct ipa3_rx_pkt_wrapper *rx_pkt; int ret; int rx_len_cached = 0; struct gsi_xfer_elem gsi_xfer_elem_array[IPA_REPL_XFER_MAX]; u32 curr; u32 curr_wq; int idx = 0; struct page *cur_page; u32 stats_i = 0; /* start replenish only when buffers go lower than the threshold */ if (sys->rx_pool_sz - sys->len < IPA_REPL_XFER_THRESH) return; stats_i = (sys->ep->client == IPA_CLIENT_APPS_WAN_COAL_CONS) ? 0 : 1; spin_lock_bh(&sys->spinlock); rx_len_cached = sys->len; curr = atomic_read(&sys->page_recycle_repl->head_idx); curr_wq = atomic_read(&sys->repl->head_idx); while (rx_len_cached < sys->rx_pool_sz) { cur_page = sys->page_recycle_repl->cache[curr]->page_data.page; /* Found an idle page that can be used */ if (page_ref_count(cur_page) == 1) { page_ref_inc(cur_page); rx_pkt = sys->page_recycle_repl->cache[curr]; curr = (++curr == sys->page_recycle_repl->capacity) ? 0 : curr; } else { /* * Could not find idle page at curr index. * Allocate a new one. */ if (curr_wq == atomic_read(&sys->repl->tail_idx)) break; ipa3_ctx->stats.page_recycle_stats[stats_i].tmp_alloc++; rx_pkt = sys->repl->cache[curr_wq]; curr_wq = (++curr_wq == sys->repl->capacity) ? 0 : curr_wq; } dma_sync_single_for_device(ipa3_ctx->pdev, rx_pkt->page_data.dma_addr, rx_pkt->len, DMA_FROM_DEVICE); gsi_xfer_elem_array[idx].addr = rx_pkt->page_data.dma_addr; gsi_xfer_elem_array[idx].len = rx_pkt->len; gsi_xfer_elem_array[idx].flags = GSI_XFER_FLAG_EOT; gsi_xfer_elem_array[idx].flags |= GSI_XFER_FLAG_EOB; gsi_xfer_elem_array[idx].flags |= GSI_XFER_FLAG_BEI; gsi_xfer_elem_array[idx].type = GSI_XFER_ELEM_DATA; gsi_xfer_elem_array[idx].xfer_user_data = rx_pkt; rx_len_cached++; idx++; ipa3_ctx->stats.page_recycle_stats[stats_i].total_replenished++; /* * gsi_xfer_elem_buffer has a size of IPA_REPL_XFER_THRESH. * If this size is reached we need to queue the xfers. */ if (idx == IPA_REPL_XFER_MAX) { ret = gsi_queue_xfer(sys->ep->gsi_chan_hdl, idx, gsi_xfer_elem_array, false); if (unlikely(ret != GSI_STATUS_SUCCESS)) { /* we don't expect this will happen */ IPAERR("failed to provide buffer: %d\n", ret); ipa_assert(); break; } idx = 0; } } /* only ring doorbell once here */ ret = gsi_queue_xfer(sys->ep->gsi_chan_hdl, idx, gsi_xfer_elem_array, true); if (likely(ret == GSI_STATUS_SUCCESS)) { /* ensure write is done before setting head index */ mb(); atomic_set(&sys->repl->head_idx, curr_wq); atomic_set(&sys->page_recycle_repl->head_idx, curr); sys->len = rx_len_cached; } else { /* we don't expect this will happen */ IPAERR("failed to provide buffer: %d\n", ret); ipa_assert(); } spin_unlock_bh(&sys->spinlock); __trigger_repl_work(sys); if (rx_len_cached <= IPA_DEFAULT_SYS_YELLOW_WM) { if (sys->ep->client == IPA_CLIENT_APPS_WAN_CONS || sys->ep->client == IPA_CLIENT_APPS_WAN_COAL_CONS) IPA_STATS_INC_CNT(ipa3_ctx->stats.wan_rx_empty); else if (sys->ep->client == IPA_CLIENT_APPS_LAN_CONS) IPA_STATS_INC_CNT(ipa3_ctx->stats.lan_rx_empty); else WARN_ON(1); queue_delayed_work(sys->wq, &sys->replenish_rx_work, msecs_to_jiffies(1)); } return; } static void ipa3_replenish_wlan_rx_cache(struct ipa3_sys_context *sys) { struct ipa3_rx_pkt_wrapper *rx_pkt = NULL; struct ipa3_rx_pkt_wrapper *tmp; int ret; struct gsi_xfer_elem gsi_xfer_elem_one; u32 rx_len_cached = 0; IPADBG_LOW("\n"); spin_lock_bh(&ipa3_ctx->wc_memb.wlan_spinlock); rx_len_cached = sys->len; if (rx_len_cached < sys->rx_pool_sz) { list_for_each_entry_safe(rx_pkt, tmp, &ipa3_ctx->wc_memb.wlan_comm_desc_list, link) { list_del(&rx_pkt->link); if (ipa3_ctx->wc_memb.wlan_comm_free_cnt > 0) ipa3_ctx->wc_memb.wlan_comm_free_cnt--; rx_pkt->len = 0; rx_pkt->sys = sys; memset(&gsi_xfer_elem_one, 0, sizeof(gsi_xfer_elem_one)); gsi_xfer_elem_one.addr = rx_pkt->data.dma_addr; gsi_xfer_elem_one.len = IPA_WLAN_RX_BUFF_SZ; gsi_xfer_elem_one.flags |= GSI_XFER_FLAG_EOT; gsi_xfer_elem_one.flags |= GSI_XFER_FLAG_EOB; gsi_xfer_elem_one.type = GSI_XFER_ELEM_DATA; gsi_xfer_elem_one.xfer_user_data = rx_pkt; ret = gsi_queue_xfer(sys->ep->gsi_chan_hdl, 1, &gsi_xfer_elem_one, true); if (unlikely(ret)) { IPAERR("failed to provide buffer: %d\n", ret); goto fail_provide_rx_buffer; } rx_len_cached = ++sys->len; if (rx_len_cached >= sys->rx_pool_sz) { spin_unlock_bh( &ipa3_ctx->wc_memb.wlan_spinlock); return; } } } spin_unlock_bh(&ipa3_ctx->wc_memb.wlan_spinlock); if (rx_len_cached < sys->rx_pool_sz && ipa3_ctx->wc_memb.wlan_comm_total_cnt < IPA_WLAN_COMM_RX_POOL_HIGH) { ipa3_replenish_rx_cache(sys); ipa3_ctx->wc_memb.wlan_comm_total_cnt += (sys->rx_pool_sz - rx_len_cached); } return; fail_provide_rx_buffer: list_del(&rx_pkt->link); spin_unlock_bh(&ipa3_ctx->wc_memb.wlan_spinlock); } static void ipa3_cleanup_wlan_rx_common_cache(void) { struct ipa3_rx_pkt_wrapper *rx_pkt; struct ipa3_rx_pkt_wrapper *tmp; spin_lock_bh(&ipa3_ctx->wc_memb.wlan_spinlock); list_for_each_entry_safe(rx_pkt, tmp, &ipa3_ctx->wc_memb.wlan_comm_desc_list, link) { list_del(&rx_pkt->link); dma_unmap_single(ipa3_ctx->pdev, rx_pkt->data.dma_addr, IPA_WLAN_RX_BUFF_SZ, DMA_FROM_DEVICE); dev_kfree_skb_any(rx_pkt->data.skb); kmem_cache_free(ipa3_ctx->rx_pkt_wrapper_cache, rx_pkt); ipa3_ctx->wc_memb.wlan_comm_free_cnt--; ipa3_ctx->wc_memb.wlan_comm_total_cnt--; } ipa3_ctx->wc_memb.total_tx_pkts_freed = 0; if (ipa3_ctx->wc_memb.wlan_comm_free_cnt != 0) IPAERR("wlan comm buff free cnt: %d\n", ipa3_ctx->wc_memb.wlan_comm_free_cnt); if (ipa3_ctx->wc_memb.wlan_comm_total_cnt != 0) IPAERR("wlan comm buff total cnt: %d\n", ipa3_ctx->wc_memb.wlan_comm_total_cnt); spin_unlock_bh(&ipa3_ctx->wc_memb.wlan_spinlock); } static void ipa3_alloc_wlan_rx_common_cache(u32 size) { void *ptr; struct ipa3_rx_pkt_wrapper *rx_pkt; int rx_len_cached = 0; gfp_t flag = GFP_NOWAIT | __GFP_NOWARN; rx_len_cached = ipa3_ctx->wc_memb.wlan_comm_total_cnt; while (rx_len_cached < size) { rx_pkt = kmem_cache_zalloc(ipa3_ctx->rx_pkt_wrapper_cache, flag); if (!rx_pkt) goto fail_kmem_cache_alloc; INIT_LIST_HEAD(&rx_pkt->link); INIT_WORK(&rx_pkt->work, ipa3_wq_rx_avail); rx_pkt->data.skb = ipa3_get_skb_ipa_rx(IPA_WLAN_RX_BUFF_SZ, flag); if (rx_pkt->data.skb == NULL) { IPAERR("failed to alloc skb\n"); goto fail_skb_alloc; } ptr = skb_put(rx_pkt->data.skb, IPA_WLAN_RX_BUFF_SZ); rx_pkt->data.dma_addr = dma_map_single(ipa3_ctx->pdev, ptr, IPA_WLAN_RX_BUFF_SZ, DMA_FROM_DEVICE); if (dma_mapping_error(ipa3_ctx->pdev, rx_pkt->data.dma_addr)) { IPAERR("dma_map_single failure %pK for %pK\n", (void *)rx_pkt->data.dma_addr, ptr); goto fail_dma_mapping; } spin_lock_bh(&ipa3_ctx->wc_memb.wlan_spinlock); list_add_tail(&rx_pkt->link, &ipa3_ctx->wc_memb.wlan_comm_desc_list); rx_len_cached = ++ipa3_ctx->wc_memb.wlan_comm_total_cnt; ipa3_ctx->wc_memb.wlan_comm_free_cnt++; spin_unlock_bh(&ipa3_ctx->wc_memb.wlan_spinlock); } return; fail_dma_mapping: dev_kfree_skb_any(rx_pkt->data.skb); fail_skb_alloc: kmem_cache_free(ipa3_ctx->rx_pkt_wrapper_cache, rx_pkt); fail_kmem_cache_alloc: return; } /** * ipa3_replenish_rx_cache() - Replenish the Rx packets cache. * * The function allocates buffers in the rx_pkt_wrapper_cache cache until there * are IPA_RX_POOL_CEIL buffers in the cache. * - Allocate a buffer in the cache * - Initialized the packets link * - Initialize the packets work struct * - Allocate the packets socket buffer (skb) * - Fill the packets skb with data * - Make the packet DMAable * - Add the packet to the system pipe linked list */ static void ipa3_replenish_rx_cache(struct ipa3_sys_context *sys) { void *ptr; struct ipa3_rx_pkt_wrapper *rx_pkt; int ret; int idx = 0; int rx_len_cached = 0; struct gsi_xfer_elem gsi_xfer_elem_array[IPA_REPL_XFER_MAX]; gfp_t flag = GFP_NOWAIT | __GFP_NOWARN; rx_len_cached = sys->len; /* start replenish only when buffers go lower than the threshold */ if (sys->rx_pool_sz - sys->len < IPA_REPL_XFER_THRESH) return; while (rx_len_cached < sys->rx_pool_sz) { rx_pkt = kmem_cache_zalloc(ipa3_ctx->rx_pkt_wrapper_cache, flag); if (!rx_pkt) goto fail_kmem_cache_alloc; INIT_WORK(&rx_pkt->work, ipa3_wq_rx_avail); rx_pkt->sys = sys; rx_pkt->data.skb = sys->get_skb(sys->rx_buff_sz, flag); if (rx_pkt->data.skb == NULL) { IPAERR("failed to alloc skb\n"); goto fail_skb_alloc; } ptr = skb_put(rx_pkt->data.skb, sys->rx_buff_sz); rx_pkt->data.dma_addr = dma_map_single(ipa3_ctx->pdev, ptr, sys->rx_buff_sz, DMA_FROM_DEVICE); if (dma_mapping_error(ipa3_ctx->pdev, rx_pkt->data.dma_addr)) { IPAERR("dma_map_single failure %pK for %pK\n", (void *)rx_pkt->data.dma_addr, ptr); goto fail_dma_mapping; } gsi_xfer_elem_array[idx].addr = rx_pkt->data.dma_addr; gsi_xfer_elem_array[idx].len = sys->rx_buff_sz; gsi_xfer_elem_array[idx].flags = GSI_XFER_FLAG_EOT; gsi_xfer_elem_array[idx].flags |= GSI_XFER_FLAG_EOB; gsi_xfer_elem_array[idx].flags |= GSI_XFER_FLAG_BEI; gsi_xfer_elem_array[idx].type = GSI_XFER_ELEM_DATA; gsi_xfer_elem_array[idx].xfer_user_data = rx_pkt; idx++; rx_len_cached++; /* * gsi_xfer_elem_buffer has a size of IPA_REPL_XFER_MAX. * If this size is reached we need to queue the xfers. */ if (idx == IPA_REPL_XFER_MAX) { ret = gsi_queue_xfer(sys->ep->gsi_chan_hdl, idx, gsi_xfer_elem_array, false); if (ret != GSI_STATUS_SUCCESS) { /* we don't expect this will happen */ IPAERR("failed to provide buffer: %d\n", ret); WARN_ON(1); break; } idx = 0; } } goto done; fail_dma_mapping: sys->free_skb(rx_pkt->data.skb); fail_skb_alloc: kmem_cache_free(ipa3_ctx->rx_pkt_wrapper_cache, rx_pkt); fail_kmem_cache_alloc: if (rx_len_cached == 0) queue_delayed_work(sys->wq, &sys->replenish_rx_work, msecs_to_jiffies(1)); done: /* only ring doorbell once here */ ret = gsi_queue_xfer(sys->ep->gsi_chan_hdl, idx, gsi_xfer_elem_array, true); if (ret == GSI_STATUS_SUCCESS) { sys->len = rx_len_cached; } else { /* we don't expect this will happen */ IPAERR("failed to provide buffer: %d\n", ret); WARN_ON(1); } } static void ipa3_replenish_rx_cache_recycle(struct ipa3_sys_context *sys) { void *ptr; struct ipa3_rx_pkt_wrapper *rx_pkt; int ret; int idx = 0; int rx_len_cached = 0; struct gsi_xfer_elem gsi_xfer_elem_array[IPA_REPL_XFER_MAX]; gfp_t flag = GFP_NOWAIT | __GFP_NOWARN; /* start replenish only when buffers go lower than the threshold */ if (sys->rx_pool_sz - sys->len < IPA_REPL_XFER_THRESH) return; rx_len_cached = sys->len; while (rx_len_cached < sys->rx_pool_sz) { if (list_empty(&sys->rcycl_list)) { rx_pkt = kmem_cache_zalloc( ipa3_ctx->rx_pkt_wrapper_cache, flag); if (!rx_pkt) goto fail_kmem_cache_alloc; INIT_WORK(&rx_pkt->work, ipa3_wq_rx_avail); rx_pkt->sys = sys; rx_pkt->data.skb = sys->get_skb(sys->rx_buff_sz, flag); if (rx_pkt->data.skb == NULL) { IPAERR("failed to alloc skb\n"); kmem_cache_free(ipa3_ctx->rx_pkt_wrapper_cache, rx_pkt); goto fail_kmem_cache_alloc; } ptr = skb_put(rx_pkt->data.skb, sys->rx_buff_sz); rx_pkt->data.dma_addr = dma_map_single(ipa3_ctx->pdev, ptr, sys->rx_buff_sz, DMA_FROM_DEVICE); if (dma_mapping_error(ipa3_ctx->pdev, rx_pkt->data.dma_addr)) { IPAERR("dma_map_single failure %pK for %pK\n", (void *)rx_pkt->data.dma_addr, ptr); goto fail_dma_mapping; } } else { spin_lock_bh(&sys->spinlock); rx_pkt = list_first_entry(&sys->rcycl_list, struct ipa3_rx_pkt_wrapper, link); list_del_init(&rx_pkt->link); spin_unlock_bh(&sys->spinlock); ptr = skb_put(rx_pkt->data.skb, sys->rx_buff_sz); rx_pkt->data.dma_addr = dma_map_single(ipa3_ctx->pdev, ptr, sys->rx_buff_sz, DMA_FROM_DEVICE); if (dma_mapping_error(ipa3_ctx->pdev, rx_pkt->data.dma_addr)) { IPAERR("dma_map_single failure %pK for %pK\n", (void *)rx_pkt->data.dma_addr, ptr); goto fail_dma_mapping; } } gsi_xfer_elem_array[idx].addr = rx_pkt->data.dma_addr; gsi_xfer_elem_array[idx].len = sys->rx_buff_sz; gsi_xfer_elem_array[idx].flags = GSI_XFER_FLAG_EOT; gsi_xfer_elem_array[idx].flags |= GSI_XFER_FLAG_EOB; gsi_xfer_elem_array[idx].flags |= GSI_XFER_FLAG_BEI; gsi_xfer_elem_array[idx].type = GSI_XFER_ELEM_DATA; gsi_xfer_elem_array[idx].xfer_user_data = rx_pkt; idx++; rx_len_cached++; /* * gsi_xfer_elem_buffer has a size of IPA_REPL_XFER_MAX. * If this size is reached we need to queue the xfers. */ if (idx == IPA_REPL_XFER_MAX) { ret = gsi_queue_xfer(sys->ep->gsi_chan_hdl, idx, gsi_xfer_elem_array, false); if (ret != GSI_STATUS_SUCCESS) { /* we don't expect this will happen */ IPAERR("failed to provide buffer: %d\n", ret); WARN_ON(1); break; } idx = 0; } } goto done; fail_dma_mapping: spin_lock_bh(&sys->spinlock); ipa3_skb_recycle(rx_pkt->data.skb); list_add_tail(&rx_pkt->link, &sys->rcycl_list); spin_unlock_bh(&sys->spinlock); fail_kmem_cache_alloc: if (rx_len_cached == 0) queue_delayed_work(sys->wq, &sys->replenish_rx_work, msecs_to_jiffies(1)); done: /* only ring doorbell once here */ ret = gsi_queue_xfer(sys->ep->gsi_chan_hdl, idx, gsi_xfer_elem_array, true); if (ret == GSI_STATUS_SUCCESS) { sys->len = rx_len_cached; } else { /* we don't expect this will happen */ IPAERR("failed to provide buffer: %d\n", ret); WARN_ON(1); } } static void ipa3_fast_replenish_rx_cache(struct ipa3_sys_context *sys) { struct ipa3_rx_pkt_wrapper *rx_pkt; int ret; int rx_len_cached = 0; struct gsi_xfer_elem gsi_xfer_elem_array[IPA_REPL_XFER_MAX]; u32 curr; int idx = 0; /* start replenish only when buffers go lower than the threshold */ if (sys->rx_pool_sz - sys->len < IPA_REPL_XFER_THRESH) return; spin_lock_bh(&sys->spinlock); rx_len_cached = sys->len; curr = atomic_read(&sys->repl->head_idx); while (rx_len_cached < sys->rx_pool_sz) { if (curr == atomic_read(&sys->repl->tail_idx)) break; rx_pkt = sys->repl->cache[curr]; gsi_xfer_elem_array[idx].addr = rx_pkt->data.dma_addr; gsi_xfer_elem_array[idx].len = sys->rx_buff_sz; gsi_xfer_elem_array[idx].flags = GSI_XFER_FLAG_EOT; gsi_xfer_elem_array[idx].flags |= GSI_XFER_FLAG_EOB; gsi_xfer_elem_array[idx].flags |= GSI_XFER_FLAG_BEI; gsi_xfer_elem_array[idx].type = GSI_XFER_ELEM_DATA; gsi_xfer_elem_array[idx].xfer_user_data = rx_pkt; rx_len_cached++; curr = (++curr == sys->repl->capacity) ? 0 : curr; idx++; /* * gsi_xfer_elem_buffer has a size of IPA_REPL_XFER_THRESH. * If this size is reached we need to queue the xfers. */ if (idx == IPA_REPL_XFER_MAX) { ret = gsi_queue_xfer(sys->ep->gsi_chan_hdl, idx, gsi_xfer_elem_array, false); if (ret != GSI_STATUS_SUCCESS) { /* we don't expect this will happen */ IPAERR("failed to provide buffer: %d\n", ret); WARN_ON(1); break; } idx = 0; } } /* only ring doorbell once here */ ret = gsi_queue_xfer(sys->ep->gsi_chan_hdl, idx, gsi_xfer_elem_array, true); if (ret == GSI_STATUS_SUCCESS) { /* ensure write is done before setting head index */ mb(); atomic_set(&sys->repl->head_idx, curr); sys->len = rx_len_cached; } else { /* we don't expect this will happen */ IPAERR("failed to provide buffer: %d\n", ret); WARN_ON(1); } spin_unlock_bh(&sys->spinlock); __trigger_repl_work(sys); if (rx_len_cached <= IPA_DEFAULT_SYS_YELLOW_WM) { if (sys->ep->client == IPA_CLIENT_APPS_WAN_CONS || sys->ep->client == IPA_CLIENT_APPS_WAN_COAL_CONS) IPA_STATS_INC_CNT(ipa3_ctx->stats.wan_rx_empty); else if (sys->ep->client == IPA_CLIENT_APPS_LAN_CONS) IPA_STATS_INC_CNT(ipa3_ctx->stats.lan_rx_empty); else WARN_ON(1); queue_delayed_work(sys->wq, &sys->replenish_rx_work, msecs_to_jiffies(1)); } } static void ipa3_replenish_rx_work_func(struct work_struct *work) { struct delayed_work *dwork; struct ipa3_sys_context *sys; dwork = container_of(work, struct delayed_work, work); sys = container_of(dwork, struct ipa3_sys_context, replenish_rx_work); IPA_ACTIVE_CLIENTS_INC_SIMPLE(); sys->repl_hdlr(sys); IPA_ACTIVE_CLIENTS_DEC_SIMPLE(); } /** * free_rx_pkt() - function to free the skb and rx_pkt_wrapper * * @chan_user_data: ipa_sys_context used for skb size and skb_free func * @xfer_uder_data: rx_pkt wrapper to be freed * */ static void free_rx_pkt(void *chan_user_data, void *xfer_user_data) { struct ipa3_rx_pkt_wrapper *rx_pkt = (struct ipa3_rx_pkt_wrapper *) xfer_user_data; struct ipa3_sys_context *sys = (struct ipa3_sys_context *) chan_user_data; dma_unmap_single(ipa3_ctx->pdev, rx_pkt->data.dma_addr, sys->rx_buff_sz, DMA_FROM_DEVICE); sys->free_skb(rx_pkt->data.skb); kmem_cache_free(ipa3_ctx->rx_pkt_wrapper_cache, rx_pkt); } /** * free_rx_page() - function to free the page and rx_pkt_wrapper * * @chan_user_data: ipa_sys_context used for skb size and skb_free func * @xfer_uder_data: rx_pkt wrapper to be freed * */ static void free_rx_page(void *chan_user_data, void *xfer_user_data) { struct ipa3_rx_pkt_wrapper *rx_pkt = (struct ipa3_rx_pkt_wrapper *) xfer_user_data; struct ipa3_sys_context *sys = rx_pkt->sys; int i; for (i = 0; i < sys->page_recycle_repl->capacity; i++) if (sys->page_recycle_repl->cache[i] == rx_pkt) break; if (i < sys->page_recycle_repl->capacity) { page_ref_dec(rx_pkt->page_data.page); sys->page_recycle_repl->cache[i] = NULL; } dma_unmap_page(ipa3_ctx->pdev, rx_pkt->page_data.dma_addr, rx_pkt->len, DMA_FROM_DEVICE); __free_pages(rx_pkt->page_data.page, rx_pkt->page_data.page_order); kmem_cache_free(ipa3_ctx->rx_pkt_wrapper_cache, rx_pkt); } /** * ipa3_cleanup_rx() - release RX queue resources * */ static void ipa3_cleanup_rx(struct ipa3_sys_context *sys) { struct ipa3_rx_pkt_wrapper *rx_pkt; struct ipa3_rx_pkt_wrapper *r; u32 head; u32 tail; int i; /* * buffers not consumed by gsi are cleaned up using cleanup callback * provided to gsi */ spin_lock_bh(&sys->spinlock); list_for_each_entry_safe(rx_pkt, r, &sys->rcycl_list, link) { list_del(&rx_pkt->link); if (rx_pkt->data.dma_addr) dma_unmap_single(ipa3_ctx->pdev, rx_pkt->data.dma_addr, sys->rx_buff_sz, DMA_FROM_DEVICE); else IPADBG("DMA address already freed\n"); sys->free_skb(rx_pkt->data.skb); kmem_cache_free(ipa3_ctx->rx_pkt_wrapper_cache, rx_pkt); } spin_unlock_bh(&sys->spinlock); if (sys->repl) { head = atomic_read(&sys->repl->head_idx); tail = atomic_read(&sys->repl->tail_idx); while (head != tail) { rx_pkt = sys->repl->cache[head]; if (sys->repl_hdlr != ipa3_replenish_rx_page_recycle) { dma_unmap_single(ipa3_ctx->pdev, rx_pkt->data.dma_addr, sys->rx_buff_sz, DMA_FROM_DEVICE); sys->free_skb(rx_pkt->data.skb); } else { dma_unmap_page(ipa3_ctx->pdev, rx_pkt->page_data.dma_addr, rx_pkt->len, DMA_FROM_DEVICE); __free_pages(rx_pkt->page_data.page, rx_pkt->page_data.page_order); } kmem_cache_free(ipa3_ctx->rx_pkt_wrapper_cache, rx_pkt); head = (head + 1) % sys->repl->capacity; } kfree(sys->repl->cache); kfree(sys->repl); sys->repl = NULL; } if (sys->page_recycle_repl) { for (i = 0; i < sys->page_recycle_repl->capacity; i++) { rx_pkt = sys->page_recycle_repl->cache[i]; if (rx_pkt) { dma_unmap_page(ipa3_ctx->pdev, rx_pkt->page_data.dma_addr, rx_pkt->len, DMA_FROM_DEVICE); __free_pages(rx_pkt->page_data.page, rx_pkt->page_data.page_order); kmem_cache_free( ipa3_ctx->rx_pkt_wrapper_cache, rx_pkt); } } kfree(sys->page_recycle_repl->cache); kfree(sys->page_recycle_repl); sys->page_recycle_repl = NULL; } } static struct sk_buff *ipa3_skb_copy_for_client(struct sk_buff *skb, int len) { struct sk_buff *skb2 = NULL; if (!ipa3_ctx->lan_rx_napi_enable) skb2 = __dev_alloc_skb(len + IPA_RX_BUFF_CLIENT_HEADROOM, GFP_KERNEL); else skb2 = __dev_alloc_skb(len + IPA_RX_BUFF_CLIENT_HEADROOM, GFP_ATOMIC); if (likely(skb2)) { /* Set the data pointer */ skb_reserve(skb2, IPA_RX_BUFF_CLIENT_HEADROOM); memcpy(skb2->data, skb->data, len); skb2->len = len; skb_set_tail_pointer(skb2, len); } return skb2; } static int ipa3_lan_rx_pyld_hdlr(struct sk_buff *skb, struct ipa3_sys_context *sys) { int rc = 0; struct ipahal_pkt_status status; u32 pkt_status_sz; struct sk_buff *skb2; int pad_len_byte; int len; unsigned char *buf; int src_pipe; unsigned int used = *(unsigned int *)skb->cb; unsigned int used_align = ALIGN(used, 32); unsigned long unused = IPA_GENERIC_RX_BUFF_BASE_SZ - used; struct ipa3_tx_pkt_wrapper *tx_pkt = NULL; unsigned long ptr; IPA_DUMP_BUFF(skb->data, 0, skb->len); if (skb->len == 0) { IPAERR("ZLT packet arrived to AP\n"); goto out; } if (sys->len_partial) { IPADBG_LOW("len_partial %d\n", sys->len_partial); buf = skb_push(skb, sys->len_partial); memcpy(buf, sys->prev_skb->data, sys->len_partial); sys->len_partial = 0; sys->free_skb(sys->prev_skb); sys->prev_skb = NULL; goto begin; } /* this pipe has TX comp (status only) + mux-ed LAN RX data * (status+data) */ if (sys->len_rem) { IPADBG_LOW("rem %d skb %d pad %d\n", sys->len_rem, skb->len, sys->len_pad); if (sys->len_rem <= skb->len) { if (sys->prev_skb) { if (!ipa3_ctx->lan_rx_napi_enable) skb2 = skb_copy_expand(sys->prev_skb, 0, sys->len_rem, GFP_KERNEL); else skb2 = skb_copy_expand(sys->prev_skb, 0, sys->len_rem, GFP_ATOMIC); if (likely(skb2)) { memcpy(skb_put(skb2, sys->len_rem), skb->data, sys->len_rem); skb_trim(skb2, skb2->len - sys->len_pad); skb2->truesize = skb2->len + sizeof(struct sk_buff); if (sys->drop_packet) dev_kfree_skb_any(skb2); else sys->ep->client_notify( sys->ep->priv, IPA_RECEIVE, (unsigned long)(skb2)); } else { IPAERR("copy expand failed\n"); } dev_kfree_skb_any(sys->prev_skb); } skb_pull(skb, sys->len_rem); sys->prev_skb = NULL; sys->len_rem = 0; sys->len_pad = 0; } else { if (sys->prev_skb) { if (!ipa3_ctx->lan_rx_napi_enable) skb2 = skb_copy_expand(sys->prev_skb, 0, skb->len, GFP_KERNEL); else skb2 = skb_copy_expand(sys->prev_skb, 0, skb->len, GFP_ATOMIC); if (likely(skb2)) { memcpy(skb_put(skb2, skb->len), skb->data, skb->len); } else { IPAERR("copy expand failed\n"); } dev_kfree_skb_any(sys->prev_skb); sys->prev_skb = skb2; } sys->len_rem -= skb->len; goto out; } } begin: pkt_status_sz = ipahal_pkt_status_get_size(); while (skb->len) { sys->drop_packet = false; IPADBG_LOW("LEN_REM %d\n", skb->len); if (skb->len < pkt_status_sz) { WARN_ON(sys->prev_skb != NULL); IPADBG_LOW("status straddles buffer\n"); if (!ipa3_ctx->lan_rx_napi_enable) sys->prev_skb = skb_copy(skb, GFP_KERNEL); else sys->prev_skb = skb_copy(skb, GFP_ATOMIC); sys->len_partial = skb->len; goto out; } ipahal_pkt_status_parse(skb->data, &status); IPADBG_LOW("STATUS opcode=%d src=%d dst=%d len=%d\n", status.status_opcode, status.endp_src_idx, status.endp_dest_idx, status.pkt_len); if (sys->status_stat) { sys->status_stat->status[sys->status_stat->curr] = status; sys->status_stat->curr++; if (sys->status_stat->curr == IPA_MAX_STATUS_STAT_NUM) sys->status_stat->curr = 0; } switch (status.status_opcode) { case IPAHAL_PKT_STATUS_OPCODE_DROPPED_PACKET: case IPAHAL_PKT_STATUS_OPCODE_PACKET: case IPAHAL_PKT_STATUS_OPCODE_SUSPENDED_PACKET: case IPAHAL_PKT_STATUS_OPCODE_PACKET_2ND_PASS: break; case IPAHAL_PKT_STATUS_OPCODE_NEW_FRAG_RULE: IPAERR_RL("Frag packets received on lan consumer\n"); IPAERR_RL("STATUS opcode=%d src=%d dst=%d src ip=%x\n", status.status_opcode, status.endp_src_idx, status.endp_dest_idx, status.src_ip_addr); skb_pull(skb, pkt_status_sz); continue; default: IPAERR_RL("unsupported opcode(%d)\n", status.status_opcode); skb_pull(skb, pkt_status_sz); continue; } IPA_STATS_EXCP_CNT(status.exception, ipa3_ctx->stats.rx_excp_pkts); if (status.endp_dest_idx >= ipa3_ctx->ipa_num_pipes || status.endp_src_idx >= ipa3_ctx->ipa_num_pipes) { IPAERR_RL("status fields invalid\n"); IPAERR_RL("STATUS opcode=%d src=%d dst=%d len=%d\n", status.status_opcode, status.endp_src_idx, status.endp_dest_idx, status.pkt_len); WARN_ON(1); /* HW gave an unexpected status */ ipa_assert(); } if (IPAHAL_PKT_STATUS_MASK_FLAG_VAL( IPAHAL_PKT_STATUS_MASK_TAG_VALID_SHFT, &status)) { struct ipa3_tag_completion *comp; IPADBG_LOW("TAG packet arrived\n"); if (status.tag_info == IPA_COOKIE) { skb_pull(skb, pkt_status_sz); if (skb->len < sizeof(comp)) { IPAERR("TAG arrived without packet\n"); goto out; } memcpy(&comp, skb->data, sizeof(comp)); skb_pull(skb, sizeof(comp)); complete(&comp->comp); if (atomic_dec_return(&comp->cnt) == 0) kfree(comp); continue; } else { ptr = tag_to_pointer_wa(status.tag_info); tx_pkt = (struct ipa3_tx_pkt_wrapper *)ptr; IPADBG_LOW("tx_pkt recv = %pK\n", tx_pkt); } } if (status.pkt_len == 0) { IPADBG_LOW("Skip aggr close status\n"); skb_pull(skb, pkt_status_sz); IPA_STATS_INC_CNT(ipa3_ctx->stats.aggr_close); IPA_STATS_DEC_CNT(ipa3_ctx->stats.rx_excp_pkts [IPAHAL_PKT_STATUS_EXCEPTION_NONE]); continue; } if (status.endp_dest_idx == (sys->ep - ipa3_ctx->ep)) { /* RX data */ src_pipe = status.endp_src_idx; /* * A packet which is received back to the AP after * there was no route match. */ if (status.exception == IPAHAL_PKT_STATUS_EXCEPTION_NONE && ipahal_is_rule_miss_id(status.rt_rule_id)) sys->drop_packet = true; if (skb->len == pkt_status_sz && status.exception == IPAHAL_PKT_STATUS_EXCEPTION_NONE) { WARN_ON(sys->prev_skb != NULL); IPADBG_LOW("Ins header in next buffer\n"); if (!ipa3_ctx->lan_rx_napi_enable) sys->prev_skb = skb_copy(skb, GFP_KERNEL); else sys->prev_skb = skb_copy(skb, GFP_ATOMIC); sys->len_partial = skb->len; goto out; } pad_len_byte = ((status.pkt_len + 3) & ~3) - status.pkt_len; len = status.pkt_len + pad_len_byte; IPADBG_LOW("pad %d pkt_len %d len %d\n", pad_len_byte, status.pkt_len, len); if (status.exception == IPAHAL_PKT_STATUS_EXCEPTION_DEAGGR) { IPADBG_LOW( "Dropping packet on DeAggr Exception\n"); sys->drop_packet = true; } skb2 = ipa3_skb_copy_for_client(skb, min(status.pkt_len + pkt_status_sz, skb->len)); if (likely(skb2)) { if (skb->len < len + pkt_status_sz) { IPADBG_LOW("SPL skb len %d len %d\n", skb->len, len); sys->prev_skb = skb2; sys->len_rem = len - skb->len + pkt_status_sz; sys->len_pad = pad_len_byte; skb_pull(skb, skb->len); } else { skb_trim(skb2, status.pkt_len + pkt_status_sz); IPADBG_LOW("rx avail for %d\n", status.endp_dest_idx); if (sys->drop_packet) { dev_kfree_skb_any(skb2); } else if (status.pkt_len > IPA_GENERIC_AGGR_BYTE_LIMIT * 1024) { IPAERR("packet size invalid\n"); IPAERR("STATUS opcode=%d\n", status.status_opcode); IPAERR("src=%d dst=%d len=%d\n", status.endp_src_idx, status.endp_dest_idx, status.pkt_len); /* Unexpected HW status */ ipa_assert(); } else { skb2->truesize = skb2->len + sizeof(struct sk_buff) + (ALIGN(len + pkt_status_sz, 32) * unused / used_align); sys->ep->client_notify( sys->ep->priv, IPA_RECEIVE, (unsigned long)(skb2)); } skb_pull(skb, len + pkt_status_sz); } } else { IPAERR("fail to alloc skb\n"); if (skb->len < len) { sys->prev_skb = NULL; sys->len_rem = len - skb->len + pkt_status_sz; sys->len_pad = pad_len_byte; skb_pull(skb, skb->len); } else { skb_pull(skb, len + pkt_status_sz); } } /* TX comp */ ipa3_wq_write_done_status(src_pipe, tx_pkt); IPADBG_LOW("tx comp imp for %d\n", src_pipe); } else { /* TX comp */ ipa3_wq_write_done_status(status.endp_src_idx, tx_pkt); IPADBG_LOW("tx comp exp for %d\n", status.endp_src_idx); skb_pull(skb, pkt_status_sz); IPA_STATS_INC_CNT(ipa3_ctx->stats.stat_compl); IPA_STATS_DEC_CNT(ipa3_ctx->stats.rx_excp_pkts [IPAHAL_PKT_STATUS_EXCEPTION_NONE]); } tx_pkt = NULL; } out: ipa3_skb_recycle(skb); return rc; } static struct sk_buff *ipa3_join_prev_skb(struct sk_buff *prev_skb, struct sk_buff *skb, unsigned int len) { struct sk_buff *skb2; skb2 = skb_copy_expand(prev_skb, 0, len, GFP_KERNEL); if (likely(skb2)) { memcpy(skb_put(skb2, len), skb->data, len); } else { IPAERR("copy expand failed\n"); skb2 = NULL; } dev_kfree_skb_any(prev_skb); return skb2; } static void ipa3_wan_rx_handle_splt_pyld(struct sk_buff *skb, struct ipa3_sys_context *sys) { struct sk_buff *skb2; IPADBG_LOW("rem %d skb %d\n", sys->len_rem, skb->len); if (sys->len_rem <= skb->len) { if (sys->prev_skb) { skb2 = ipa3_join_prev_skb(sys->prev_skb, skb, sys->len_rem); if (likely(skb2)) { IPADBG_LOW( "removing Status element from skb and sending to WAN client"); skb_pull(skb2, ipahal_pkt_status_get_size()); skb2->truesize = skb2->len + sizeof(struct sk_buff); sys->ep->client_notify(sys->ep->priv, IPA_RECEIVE, (unsigned long)(skb2)); } } skb_pull(skb, sys->len_rem); sys->prev_skb = NULL; sys->len_rem = 0; } else { if (sys->prev_skb) { skb2 = ipa3_join_prev_skb(sys->prev_skb, skb, skb->len); sys->prev_skb = skb2; } sys->len_rem -= skb->len; skb_pull(skb, skb->len); } } static int ipa3_wan_rx_pyld_hdlr(struct sk_buff *skb, struct ipa3_sys_context *sys) { struct ipahal_pkt_status status; unsigned char *skb_data; u32 pkt_status_sz; struct sk_buff *skb2; u16 pkt_len_with_pad; u32 qmap_hdr; int checksum_trailer_exists; int frame_len; int ep_idx; unsigned int used = *(unsigned int *)skb->cb; unsigned int used_align = ALIGN(used, 32); unsigned long unused = IPA_GENERIC_RX_BUFF_BASE_SZ - used; IPA_DUMP_BUFF(skb->data, 0, skb->len); if (skb->len == 0) { IPAERR("ZLT\n"); goto bail; } if (ipa3_ctx->ipa_client_apps_wan_cons_agg_gro) { sys->ep->client_notify(sys->ep->priv, IPA_RECEIVE, (unsigned long)(skb)); return 0; } if (sys->repl_hdlr == ipa3_replenish_rx_cache_recycle) { IPAERR("Recycle should enable only with GRO Aggr\n"); ipa_assert(); } /* * payload splits across 2 buff or more, * take the start of the payload from prev_skb */ if (sys->len_rem) ipa3_wan_rx_handle_splt_pyld(skb, sys); pkt_status_sz = ipahal_pkt_status_get_size(); while (skb->len) { IPADBG_LOW("LEN_REM %d\n", skb->len); if (skb->len < pkt_status_sz) { IPAERR("status straddles buffer\n"); WARN_ON(1); goto bail; } ipahal_pkt_status_parse(skb->data, &status); skb_data = skb->data; IPADBG_LOW("STATUS opcode=%d src=%d dst=%d len=%d\n", status.status_opcode, status.endp_src_idx, status.endp_dest_idx, status.pkt_len); if (sys->status_stat) { sys->status_stat->status[sys->status_stat->curr] = status; sys->status_stat->curr++; if (sys->status_stat->curr == IPA_MAX_STATUS_STAT_NUM) sys->status_stat->curr = 0; } if ((status.status_opcode != IPAHAL_PKT_STATUS_OPCODE_DROPPED_PACKET) && (status.status_opcode != IPAHAL_PKT_STATUS_OPCODE_PACKET) && (status.status_opcode != IPAHAL_PKT_STATUS_OPCODE_PACKET_2ND_PASS)) { IPAERR("unsupported opcode(%d)\n", status.status_opcode); skb_pull(skb, pkt_status_sz); continue; } IPA_STATS_INC_CNT(ipa3_ctx->stats.rx_pkts); if (status.endp_dest_idx >= ipa3_ctx->ipa_num_pipes || status.endp_src_idx >= ipa3_ctx->ipa_num_pipes) { IPAERR("status fields invalid\n"); WARN_ON(1); goto bail; } if (status.pkt_len == 0) { IPADBG_LOW("Skip aggr close status\n"); skb_pull(skb, pkt_status_sz); IPA_STATS_DEC_CNT(ipa3_ctx->stats.rx_pkts); IPA_STATS_INC_CNT(ipa3_ctx->stats.wan_aggr_close); continue; } ep_idx = ipa3_get_ep_mapping(IPA_CLIENT_APPS_WAN_CONS); if (status.endp_dest_idx != ep_idx) { IPAERR("expected endp_dest_idx %d received %d\n", ep_idx, status.endp_dest_idx); WARN_ON(1); goto bail; } /* RX data */ if (skb->len == pkt_status_sz) { IPAERR("Ins header in next buffer\n"); WARN_ON(1); goto bail; } qmap_hdr = *(u32 *)(skb_data + pkt_status_sz); /* * Take the pkt_len_with_pad from the last 2 bytes of the QMAP * header */ /*QMAP is BE: convert the pkt_len field from BE to LE*/ pkt_len_with_pad = ntohs((qmap_hdr>>16) & 0xffff); IPADBG_LOW("pkt_len with pad %d\n", pkt_len_with_pad); /*get the CHECKSUM_PROCESS bit*/ checksum_trailer_exists = IPAHAL_PKT_STATUS_MASK_FLAG_VAL( IPAHAL_PKT_STATUS_MASK_CKSUM_PROCESS_SHFT, &status); IPADBG_LOW("checksum_trailer_exists %d\n", checksum_trailer_exists); frame_len = pkt_status_sz + IPA_QMAP_HEADER_LENGTH + pkt_len_with_pad; if (checksum_trailer_exists) frame_len += IPA_DL_CHECKSUM_LENGTH; IPADBG_LOW("frame_len %d\n", frame_len); skb2 = skb_clone(skb, GFP_KERNEL); if (likely(skb2)) { /* * the len of actual data is smaller than expected * payload split across 2 buff */ if (skb->len < frame_len) { IPADBG_LOW("SPL skb len %d len %d\n", skb->len, frame_len); sys->prev_skb = skb2; sys->len_rem = frame_len - skb->len; skb_pull(skb, skb->len); } else { skb_trim(skb2, frame_len); IPADBG_LOW("rx avail for %d\n", status.endp_dest_idx); IPADBG_LOW( "removing Status element from skb and sending to WAN client"); skb_pull(skb2, pkt_status_sz); skb2->truesize = skb2->len + sizeof(struct sk_buff) + (ALIGN(frame_len, 32) * unused / used_align); sys->ep->client_notify(sys->ep->priv, IPA_RECEIVE, (unsigned long)(skb2)); skb_pull(skb, frame_len); } } else { IPAERR("fail to clone\n"); if (skb->len < frame_len) { sys->prev_skb = NULL; sys->len_rem = frame_len - skb->len; skb_pull(skb, skb->len); } else { skb_pull(skb, frame_len); } } } bail: sys->free_skb(skb); return 0; } static struct sk_buff *ipa3_get_skb_ipa_rx(unsigned int len, gfp_t flags) { return __dev_alloc_skb(len, flags); } static void ipa3_free_skb_rx(struct sk_buff *skb) { dev_kfree_skb_any(skb); } void ipa3_lan_rx_cb(void *priv, enum ipa_dp_evt_type evt, unsigned long data) { struct sk_buff *rx_skb = (struct sk_buff *)data; struct ipahal_pkt_status_thin status; struct ipa3_ep_context *ep; unsigned int src_pipe; u32 metadata; u8 ucp; void (*client_notify)(void *client_priv, enum ipa_dp_evt_type evt, unsigned long data); void *client_priv; ipahal_pkt_status_parse_thin(rx_skb->data, &status); src_pipe = status.endp_src_idx; metadata = status.metadata; ucp = status.ucp; ep = &ipa3_ctx->ep[src_pipe]; if (unlikely(src_pipe >= ipa3_ctx->ipa_num_pipes) || unlikely(atomic_read(&ep->disconnect_in_progress))) { IPAERR("drop pipe=%d\n", src_pipe); dev_kfree_skb_any(rx_skb); return; } if (status.exception == IPAHAL_PKT_STATUS_EXCEPTION_NONE) skb_pull(rx_skb, ipahal_pkt_status_get_size() + IPA_LAN_RX_HEADER_LENGTH); else skb_pull(rx_skb, ipahal_pkt_status_get_size()); /* Metadata Info * ------------------------------------------ * | 3 | 2 | 1 | 0 | * | fw_desc | vdev_id | qmap mux id | Resv | * ------------------------------------------ */ *(u16 *)rx_skb->cb = ((metadata >> 16) & 0xFFFF); *(u8 *)(rx_skb->cb + 4) = ucp; IPADBG_LOW("meta_data: 0x%x cb: 0x%x\n", metadata, *(u32 *)rx_skb->cb); IPADBG_LOW("ucp: %d\n", *(u8 *)(rx_skb->cb + 4)); spin_lock(&ipa3_ctx->disconnect_lock); if (likely((!atomic_read(&ep->disconnect_in_progress)) && ep->valid && ep->client_notify)) { client_notify = ep->client_notify; client_priv = ep->priv; spin_unlock(&ipa3_ctx->disconnect_lock); client_notify(client_priv, IPA_RECEIVE, (unsigned long)(rx_skb)); } else { spin_unlock(&ipa3_ctx->disconnect_lock); dev_kfree_skb_any(rx_skb); } } static void ipa3_recycle_rx_wrapper(struct ipa3_rx_pkt_wrapper *rx_pkt) { rx_pkt->data.dma_addr = 0; /* skb recycle was moved to pyld_hdlr */ INIT_LIST_HEAD(&rx_pkt->link); spin_lock_bh(&rx_pkt->sys->spinlock); list_add_tail(&rx_pkt->link, &rx_pkt->sys->rcycl_list); spin_unlock_bh(&rx_pkt->sys->spinlock); } static void ipa3_recycle_rx_page_wrapper(struct ipa3_rx_pkt_wrapper *rx_pkt) { struct ipa_rx_page_data rx_page; rx_page = rx_pkt->page_data; /* Free rx_wrapper only for tmp alloc pages*/ if (rx_page.is_tmp_alloc) kmem_cache_free(ipa3_ctx->rx_pkt_wrapper_cache, rx_pkt); } /** * handle_skb_completion()- Handle event completion EOB or EOT and prep the skb * * if eob: Set skb values, put rx_pkt at the end of the list and return NULL * * if eot: Set skb values, put skb at the end of the list. Then update the * length and chain the skbs together while also freeing and unmapping the * corresponding rx pkt. Once finished return the head_skb to be sent up the * network stack. */ static struct sk_buff *handle_skb_completion(struct gsi_chan_xfer_notify *notify, bool update_truesize) { struct ipa3_rx_pkt_wrapper *rx_pkt, *tmp; struct sk_buff *rx_skb, *next_skb = NULL; struct list_head *head; struct ipa3_sys_context *sys; sys = (struct ipa3_sys_context *) notify->chan_user_data; rx_pkt = (struct ipa3_rx_pkt_wrapper *) notify->xfer_user_data; spin_lock_bh(&rx_pkt->sys->spinlock); rx_pkt->sys->len--; spin_unlock_bh(&rx_pkt->sys->spinlock); if (notify->bytes_xfered) rx_pkt->len = notify->bytes_xfered; /*Drop packets when WAN consumer channel receive EOB event*/ if ((notify->evt_id == GSI_CHAN_EVT_EOB || sys->skip_eot) && sys->ep->client == IPA_CLIENT_APPS_WAN_CONS) { dma_unmap_single(ipa3_ctx->pdev, rx_pkt->data.dma_addr, sys->rx_buff_sz, DMA_FROM_DEVICE); sys->free_skb(rx_pkt->data.skb); sys->free_rx_wrapper(rx_pkt); sys->eob_drop_cnt++; if (notify->evt_id == GSI_CHAN_EVT_EOB) { IPADBG("EOB event on WAN consumer channel, drop\n"); sys->skip_eot = true; } else { IPADBG("Reset skip eot flag.\n"); sys->skip_eot = false; } return NULL; } rx_skb = rx_pkt->data.skb; skb_set_tail_pointer(rx_skb, rx_pkt->len); rx_skb->len = rx_pkt->len; if (update_truesize) { *(unsigned int *)rx_skb->cb = rx_skb->len; rx_skb->truesize = rx_pkt->len + sizeof(struct sk_buff); } if (unlikely(notify->veid >= GSI_VEID_MAX)) { WARN_ON(1); return NULL; } head = &rx_pkt->sys->pending_pkts[notify->veid]; INIT_LIST_HEAD(&rx_pkt->link); list_add_tail(&rx_pkt->link, head); /* Check added for handling LAN consumer packet without EOT flag */ if (notify->evt_id == GSI_CHAN_EVT_EOT || sys->ep->client == IPA_CLIENT_APPS_LAN_CONS) { /* go over the list backward to save computations on updating length */ list_for_each_entry_safe_reverse(rx_pkt, tmp, head, link) { rx_skb = rx_pkt->data.skb; list_del(&rx_pkt->link); dma_unmap_single(ipa3_ctx->pdev, rx_pkt->data.dma_addr, sys->rx_buff_sz, DMA_FROM_DEVICE); sys->free_rx_wrapper(rx_pkt); if (next_skb) { skb_shinfo(rx_skb)->frag_list = next_skb; rx_skb->len += next_skb->len; rx_skb->data_len += next_skb->len; } next_skb = rx_skb; } } else { return NULL; } return rx_skb; } /** * handle_page_completion()- Handle event completion EOB or EOT * and prep the skb * * if eob: Set skb values, put rx_pkt at the end of the list and return NULL * * if eot: Set skb values, put skb at the end of the list. Then update the * length and put the page together to the frags while also * freeing and unmapping the corresponding rx pkt. Once finished * return the head_skb to be sent up the network stack. */ static struct sk_buff *handle_page_completion(struct gsi_chan_xfer_notify *notify, bool update_truesize) { struct ipa3_rx_pkt_wrapper *rx_pkt, *tmp; struct sk_buff *rx_skb; struct list_head *head; struct ipa3_sys_context *sys; struct ipa_rx_page_data rx_page; sys = (struct ipa3_sys_context *) notify->chan_user_data; rx_pkt = (struct ipa3_rx_pkt_wrapper *) notify->xfer_user_data; rx_page = rx_pkt->page_data; spin_lock_bh(&rx_pkt->sys->spinlock); rx_pkt->sys->len--; spin_unlock_bh(&rx_pkt->sys->spinlock); /* TODO: truesize handle for EOB */ if (update_truesize) IPAERR("update_truesize not supported\n"); if (notify->veid >= GSI_VEID_MAX) { IPAERR("notify->veid > GSI_VEID_MAX\n"); if (!rx_page.is_tmp_alloc) { init_page_count(rx_page.page); } else { dma_unmap_page(ipa3_ctx->pdev, rx_page.dma_addr, rx_pkt->len, DMA_FROM_DEVICE); __free_pages(rx_pkt->page_data.page, rx_pkt->page_data.page_order); } rx_pkt->sys->free_rx_wrapper(rx_pkt); IPA_STATS_INC_CNT(ipa3_ctx->stats.rx_page_drop_cnt); return NULL; } head = &rx_pkt->sys->pending_pkts[notify->veid]; INIT_LIST_HEAD(&rx_pkt->link); list_add_tail(&rx_pkt->link, head); /* Check added for handling LAN consumer packet without EOT flag */ if (notify->evt_id == GSI_CHAN_EVT_EOT || sys->ep->client == IPA_CLIENT_APPS_LAN_CONS) { rx_skb = alloc_skb(0, GFP_ATOMIC); if (unlikely(!rx_skb)) { IPAERR("skb alloc failure, free all pending pages\n"); list_for_each_entry_safe(rx_pkt, tmp, head, link) { rx_page = rx_pkt->page_data; list_del_init(&rx_pkt->link); if (!rx_page.is_tmp_alloc) { init_page_count(rx_page.page); } else { dma_unmap_page(ipa3_ctx->pdev, rx_page.dma_addr, rx_pkt->len, DMA_FROM_DEVICE); __free_pages(rx_pkt->page_data.page, rx_pkt->page_data.page_order); } rx_pkt->sys->free_rx_wrapper(rx_pkt); } IPA_STATS_INC_CNT(ipa3_ctx->stats.rx_page_drop_cnt); return NULL; } /* go over the list backward to save computations on updating length */ list_for_each_entry_safe_reverse(rx_pkt, tmp, head, link) { rx_page = rx_pkt->page_data; list_del(&rx_pkt->link); if (rx_page.is_tmp_alloc) dma_unmap_page(ipa3_ctx->pdev, rx_page.dma_addr, rx_pkt->len, DMA_FROM_DEVICE); else dma_sync_single_for_cpu(ipa3_ctx->pdev, rx_page.dma_addr, rx_pkt->len, DMA_FROM_DEVICE); rx_pkt->sys->free_rx_wrapper(rx_pkt); skb_add_rx_frag(rx_skb, skb_shinfo(rx_skb)->nr_frags, rx_page.page, 0, notify->bytes_xfered, PAGE_SIZE << rx_page.page_order); } } else { return NULL; } return rx_skb; } static void ipa3_wq_rx_common(struct ipa3_sys_context *sys, struct gsi_chan_xfer_notify *notify) { struct sk_buff *rx_skb; struct ipa3_sys_context *coal_sys; int ipa_ep_idx; if (unlikely(!notify)) { IPAERR_RL("gsi_chan_xfer_notify is null\n"); return; } rx_skb = handle_skb_completion(notify, true); if (likely(rx_skb)) { sys->pyld_hdlr(rx_skb, sys); /* For coalescing, we have 2 transfer rings to replenish */ if (sys->ep->client == IPA_CLIENT_APPS_WAN_COAL_CONS) { ipa_ep_idx = ipa3_get_ep_mapping( IPA_CLIENT_APPS_WAN_CONS); if (unlikely(ipa_ep_idx == IPA_EP_NOT_ALLOCATED)) { IPAERR("Invalid client.\n"); return; } coal_sys = ipa3_ctx->ep[ipa_ep_idx].sys; coal_sys->repl_hdlr(coal_sys); } sys->repl_hdlr(sys); } } static void ipa3_rx_napi_chain(struct ipa3_sys_context *sys, struct gsi_chan_xfer_notify *notify, uint32_t num) { struct ipa3_sys_context *wan_def_sys; int i, ipa_ep_idx; struct sk_buff *rx_skb, *first_skb = NULL, *prev_skb = NULL; /* non-coalescing case (SKB chaining enabled) */ if (sys->ep->client != IPA_CLIENT_APPS_WAN_COAL_CONS) { for (i = 0; i < num; i++) { if (!ipa3_ctx->ipa_wan_skb_page) rx_skb = handle_skb_completion( ¬ify[i], false); else rx_skb = handle_page_completion( ¬ify[i], false); /* this is always true for EOTs */ if (rx_skb) { if (!first_skb) first_skb = rx_skb; if (prev_skb) skb_shinfo(prev_skb)->frag_list = rx_skb; prev_skb = rx_skb; } } if (prev_skb) { skb_shinfo(prev_skb)->frag_list = NULL; sys->pyld_hdlr(first_skb, sys); } } else { if (!ipa3_ctx->ipa_wan_skb_page) { /* TODO: add chaining for coal case */ for (i = 0; i < num; i++) { rx_skb = handle_skb_completion( ¬ify[i], false); if (rx_skb) { sys->pyld_hdlr(rx_skb, sys); /* * For coalescing, we have 2 transfer * rings to replenish */ ipa_ep_idx = ipa3_get_ep_mapping( IPA_CLIENT_APPS_WAN_CONS); if (unlikely(ipa_ep_idx == IPA_EP_NOT_ALLOCATED)) { IPAERR("Invalid client.\n"); return; } wan_def_sys = ipa3_ctx->ep[ipa_ep_idx].sys; wan_def_sys->repl_hdlr(wan_def_sys); sys->repl_hdlr(sys); } } } else { for (i = 0; i < num; i++) { rx_skb = handle_page_completion( ¬ify[i], false); /* this is always true for EOTs */ if (rx_skb) { if (!first_skb) first_skb = rx_skb; if (prev_skb) skb_shinfo(prev_skb)->frag_list = rx_skb; prev_skb = rx_skb; } } if (prev_skb) { skb_shinfo(prev_skb)->frag_list = NULL; sys->pyld_hdlr(first_skb, sys); /* * For coalescing, we have 2 transfer * rings to replenish */ ipa_ep_idx = ipa3_get_ep_mapping( IPA_CLIENT_APPS_WAN_CONS); if (unlikely(ipa_ep_idx == IPA_EP_NOT_ALLOCATED)) { IPAERR("Invalid client.\n"); return; } wan_def_sys = ipa3_ctx->ep[ipa_ep_idx].sys; wan_def_sys->repl_hdlr(wan_def_sys); } } } } static void ipa3_wlan_wq_rx_common(struct ipa3_sys_context *sys, struct gsi_chan_xfer_notify *notify) { struct ipa3_rx_pkt_wrapper *rx_pkt_expected; struct sk_buff *rx_skb; rx_pkt_expected = (struct ipa3_rx_pkt_wrapper *) notify->xfer_user_data; sys->len--; if (notify->bytes_xfered) rx_pkt_expected->len = notify->bytes_xfered; rx_skb = rx_pkt_expected->data.skb; skb_set_tail_pointer(rx_skb, rx_pkt_expected->len); rx_skb->len = rx_pkt_expected->len; rx_skb->truesize = rx_pkt_expected->len + sizeof(struct sk_buff); sys->ep->wstats.tx_pkts_rcvd++; if (sys->len <= IPA_WLAN_RX_POOL_SZ_LOW_WM) { ipa3_free_skb(&rx_pkt_expected->data); sys->ep->wstats.tx_pkts_dropped++; } else { sys->ep->wstats.tx_pkts_sent++; sys->ep->client_notify(sys->ep->priv, IPA_RECEIVE, (unsigned long)(&rx_pkt_expected->data)); } ipa3_replenish_wlan_rx_cache(sys); } static void ipa3_dma_memcpy_notify(struct ipa3_sys_context *sys) { IPADBG_LOW("ENTER.\n"); if (unlikely(list_empty(&sys->head_desc_list))) { IPAERR("descriptor list is empty!\n"); WARN_ON(1); return; } sys->ep->client_notify(sys->ep->priv, IPA_RECEIVE, 0); IPADBG_LOW("EXIT\n"); } static void ipa3_wq_rx_avail(struct work_struct *work) { struct ipa3_rx_pkt_wrapper *rx_pkt; struct ipa3_sys_context *sys; rx_pkt = container_of(work, struct ipa3_rx_pkt_wrapper, work); WARN(unlikely(rx_pkt == NULL), "rx pkt is null"); sys = rx_pkt->sys; ipa3_wq_rx_common(sys, 0); } static int ipa3_odu_rx_pyld_hdlr(struct sk_buff *rx_skb, struct ipa3_sys_context *sys) { if (sys->ep->client_notify) { sys->ep->client_notify(sys->ep->priv, IPA_RECEIVE, (unsigned long)(rx_skb)); } else { dev_kfree_skb_any(rx_skb); WARN(1, "client notify is null"); } return 0; } static int ipa3_odl_dpl_rx_pyld_hdlr(struct sk_buff *rx_skb, struct ipa3_sys_context *sys) { if (WARN(!sys->ep->client_notify, "sys->ep->client_notify is NULL\n")) { dev_kfree_skb_any(rx_skb); } else { sys->ep->client_notify(sys->ep->priv, IPA_RECEIVE, (unsigned long)(rx_skb)); /*Recycle the SKB before reusing it*/ ipa3_skb_recycle(rx_skb); } return 0; } static void ipa3_free_rx_wrapper(struct ipa3_rx_pkt_wrapper *rk_pkt) { kmem_cache_free(ipa3_ctx->rx_pkt_wrapper_cache, rk_pkt); } static void ipa3_set_aggr_limit(struct ipa_sys_connect_params *in, struct ipa3_sys_context *sys) { u32 *aggr_byte_limit = &in->ipa_ep_cfg.aggr.aggr_byte_limit; u32 adjusted_sz = ipa_adjust_ra_buff_base_sz(*aggr_byte_limit); IPADBG("get close-by %u\n", adjusted_sz); IPADBG("set rx_buff_sz %lu\n", (unsigned long) IPA_GENERIC_RX_BUFF_SZ(adjusted_sz)); /* disable ipa_status */ sys->ep->status.status_en = false; sys->rx_buff_sz = IPA_GENERIC_RX_BUFF_SZ(adjusted_sz); if (in->client == IPA_CLIENT_APPS_WAN_COAL_CONS || (in->client == IPA_CLIENT_APPS_WAN_CONS && ipa3_ctx->ipa_hw_type <= IPA_HW_v4_2)) in->ipa_ep_cfg.aggr.aggr_hard_byte_limit_en = 1; *aggr_byte_limit = sys->rx_buff_sz < *aggr_byte_limit ? IPA_ADJUST_AGGR_BYTE_LIMIT(sys->rx_buff_sz) : IPA_ADJUST_AGGR_BYTE_LIMIT(*aggr_byte_limit); IPADBG("set aggr_limit %lu\n", (unsigned long) *aggr_byte_limit); } static int ipa3_assign_policy(struct ipa_sys_connect_params *in, struct ipa3_sys_context *sys) { bool apps_wan_cons_agg_gro_flag; unsigned long aggr_byte_limit; if (in->client == IPA_CLIENT_APPS_CMD_PROD) { sys->policy = IPA_POLICY_INTR_MODE; sys->use_comm_evt_ring = false; return 0; } if (in->client == IPA_CLIENT_APPS_WAN_PROD) { sys->policy = IPA_POLICY_INTR_MODE; sys->use_comm_evt_ring = true; INIT_WORK(&sys->work, ipa3_send_nop_desc); atomic_set(&sys->workqueue_flushed, 0); /* * enable source notification status for exception packets * (i.e. QMAP commands) to be routed to modem. */ sys->ep->status.status_en = true; sys->ep->status.status_ep = ipa3_get_ep_mapping(IPA_CLIENT_Q6_WAN_CONS); return 0; } if (IPA_CLIENT_IS_MEMCPY_DMA_PROD(in->client)) { sys->policy = IPA_POLICY_NOINTR_MODE; return 0; } apps_wan_cons_agg_gro_flag = ipa3_ctx->ipa_client_apps_wan_cons_agg_gro; aggr_byte_limit = in->ipa_ep_cfg.aggr.aggr_byte_limit; if (IPA_CLIENT_IS_PROD(in->client)) { if (sys->ep->skip_ep_cfg) { sys->policy = IPA_POLICY_INTR_POLL_MODE; sys->use_comm_evt_ring = true; atomic_set(&sys->curr_polling_state, 0); } else { sys->policy = IPA_POLICY_INTR_MODE; sys->use_comm_evt_ring = true; INIT_WORK(&sys->work, ipa3_send_nop_desc); atomic_set(&sys->workqueue_flushed, 0); } } else { if (in->client == IPA_CLIENT_APPS_LAN_CONS || in->client == IPA_CLIENT_APPS_WAN_CONS || in->client == IPA_CLIENT_APPS_WAN_COAL_CONS) { sys->ep->status.status_en = true; sys->policy = IPA_POLICY_INTR_POLL_MODE; INIT_WORK(&sys->work, ipa3_wq_handle_rx); INIT_DELAYED_WORK(&sys->switch_to_intr_work, ipa3_switch_to_intr_rx_work_func); INIT_DELAYED_WORK(&sys->replenish_rx_work, ipa3_replenish_rx_work_func); atomic_set(&sys->curr_polling_state, 0); sys->rx_buff_sz = IPA_GENERIC_RX_BUFF_SZ( IPA_GENERIC_RX_BUFF_BASE_SZ); sys->get_skb = ipa3_get_skb_ipa_rx; sys->free_skb = ipa3_free_skb_rx; in->ipa_ep_cfg.aggr.aggr_en = IPA_ENABLE_AGGR; if (in->client == IPA_CLIENT_APPS_WAN_COAL_CONS) in->ipa_ep_cfg.aggr.aggr = IPA_COALESCE; else in->ipa_ep_cfg.aggr.aggr = IPA_GENERIC; in->ipa_ep_cfg.aggr.aggr_time_limit = IPA_GENERIC_AGGR_TIME_LIMIT; if (in->client == IPA_CLIENT_APPS_LAN_CONS) { INIT_WORK(&sys->repl_work, ipa3_wq_repl_rx); sys->pyld_hdlr = ipa3_lan_rx_pyld_hdlr; sys->repl_hdlr = ipa3_replenish_rx_cache_recycle; sys->free_rx_wrapper = ipa3_recycle_rx_wrapper; sys->rx_pool_sz = ipa3_ctx->lan_rx_ring_size; in->ipa_ep_cfg.aggr.aggr_byte_limit = IPA_GENERIC_AGGR_BYTE_LIMIT; in->ipa_ep_cfg.aggr.aggr_pkt_limit = IPA_GENERIC_AGGR_PKT_LIMIT; } else if (in->client == IPA_CLIENT_APPS_WAN_CONS || in->client == IPA_CLIENT_APPS_WAN_COAL_CONS) { if (ipa3_ctx->ipa_wan_skb_page && in->napi_obj) { INIT_WORK(&sys->repl_work, ipa3_wq_page_repl); sys->pyld_hdlr = ipa3_wan_rx_pyld_hdlr; sys->free_rx_wrapper = ipa3_recycle_rx_page_wrapper; sys->repl_hdlr = ipa3_replenish_rx_page_recycle; sys->rx_pool_sz = ipa3_ctx->wan_rx_ring_size; } else { INIT_WORK(&sys->repl_work, ipa3_wq_repl_rx); sys->pyld_hdlr = ipa3_wan_rx_pyld_hdlr; sys->free_rx_wrapper = ipa3_free_rx_wrapper; sys->rx_pool_sz = ipa3_ctx->wan_rx_ring_size; if (nr_cpu_ids > 1) { sys->repl_hdlr = ipa3_fast_replenish_rx_cache; } else { sys->repl_hdlr = ipa3_replenish_rx_cache; } if (in->napi_obj && in->recycle_enabled) sys->repl_hdlr = ipa3_replenish_rx_cache_recycle; } in->ipa_ep_cfg.aggr.aggr_sw_eof_active = true; if (apps_wan_cons_agg_gro_flag) ipa3_set_aggr_limit(in, sys); else { in->ipa_ep_cfg.aggr.aggr_byte_limit = IPA_GENERIC_AGGR_BYTE_LIMIT; in->ipa_ep_cfg.aggr.aggr_pkt_limit = IPA_GENERIC_AGGR_PKT_LIMIT; } } } else if (IPA_CLIENT_IS_WLAN_CONS(in->client)) { IPADBG("assigning policy to client:%d", in->client); sys->policy = IPA_POLICY_INTR_POLL_MODE; INIT_WORK(&sys->work, ipa3_wq_handle_rx); INIT_DELAYED_WORK(&sys->switch_to_intr_work, ipa3_switch_to_intr_rx_work_func); INIT_DELAYED_WORK(&sys->replenish_rx_work, ipa3_replenish_rx_work_func); atomic_set(&sys->curr_polling_state, 0); sys->rx_buff_sz = IPA_WLAN_RX_BUFF_SZ; sys->rx_pool_sz = in->desc_fifo_sz / IPA_FIFO_ELEMENT_SIZE - 1; if (sys->rx_pool_sz > IPA_WLAN_RX_POOL_SZ) sys->rx_pool_sz = IPA_WLAN_RX_POOL_SZ; sys->pyld_hdlr = NULL; sys->repl_hdlr = ipa3_replenish_wlan_rx_cache; sys->get_skb = ipa3_get_skb_ipa_rx; sys->free_skb = ipa3_free_skb_rx; sys->free_rx_wrapper = ipa3_free_rx_wrapper; in->ipa_ep_cfg.aggr.aggr_en = IPA_BYPASS_AGGR; } else if (IPA_CLIENT_IS_ODU_CONS(in->client)) { IPADBG("assigning policy to client:%d", in->client); sys->policy = IPA_POLICY_INTR_POLL_MODE; INIT_WORK(&sys->work, ipa3_wq_handle_rx); INIT_DELAYED_WORK(&sys->switch_to_intr_work, ipa3_switch_to_intr_rx_work_func); INIT_DELAYED_WORK(&sys->replenish_rx_work, ipa3_replenish_rx_work_func); atomic_set(&sys->curr_polling_state, 0); sys->rx_pool_sz = in->desc_fifo_sz / IPA_FIFO_ELEMENT_SIZE - 1; if (sys->rx_pool_sz > IPA_ODU_RX_POOL_SZ) sys->rx_pool_sz = IPA_ODU_RX_POOL_SZ; sys->pyld_hdlr = ipa3_odu_rx_pyld_hdlr; sys->get_skb = ipa3_get_skb_ipa_rx; sys->free_skb = ipa3_free_skb_rx; /* recycle skb for GSB use case */ if (ipa3_ctx->ipa_hw_type >= IPA_HW_v4_0) { sys->free_rx_wrapper = ipa3_free_rx_wrapper; sys->repl_hdlr = ipa3_replenish_rx_cache; /* Overwrite buffer size & aggr limit for GSB */ sys->rx_buff_sz = IPA_GENERIC_RX_BUFF_SZ( IPA_GSB_RX_BUFF_BASE_SZ); in->ipa_ep_cfg.aggr.aggr_byte_limit = IPA_GSB_AGGR_BYTE_LIMIT; } else { sys->free_rx_wrapper = ipa3_free_rx_wrapper; sys->repl_hdlr = ipa3_replenish_rx_cache; sys->rx_buff_sz = IPA_ODU_RX_BUFF_SZ; } } else if (in->client == IPA_CLIENT_MEMCPY_DMA_ASYNC_CONS) { IPADBG("assigning policy to client:%d", in->client); sys->policy = IPA_POLICY_INTR_POLL_MODE; INIT_WORK(&sys->work, ipa3_wq_handle_rx); INIT_DELAYED_WORK(&sys->switch_to_intr_work, ipa3_switch_to_intr_rx_work_func); } else if (in->client == IPA_CLIENT_MEMCPY_DMA_SYNC_CONS) { IPADBG("assigning policy to client:%d", in->client); sys->policy = IPA_POLICY_NOINTR_MODE; } else if (in->client == IPA_CLIENT_ODL_DPL_CONS) { IPADBG("assigning policy to ODL client:%d\n", in->client); /* Status enabling is needed for DPLv2 with * IPA versions < 4.5. * Dont enable ipa_status for APQ, since MDM IPA * has IPA >= 4.5 with DPLv3. */ if ((ipa3_ctx->platform_type == IPA_PLAT_TYPE_APQ && ipa3_is_mhip_offload_enabled()) || (ipa3_ctx->ipa_hw_type >= IPA_HW_v4_5)) sys->ep->status.status_en = false; else sys->ep->status.status_en = true; sys->policy = IPA_POLICY_INTR_POLL_MODE; INIT_WORK(&sys->work, ipa3_wq_handle_rx); INIT_DELAYED_WORK(&sys->switch_to_intr_work, ipa3_switch_to_intr_rx_work_func); INIT_DELAYED_WORK(&sys->replenish_rx_work, ipa3_replenish_rx_work_func); atomic_set(&sys->curr_polling_state, 0); sys->rx_buff_sz = IPA_GENERIC_RX_BUFF_SZ(IPA_ODL_RX_BUFF_SZ); sys->pyld_hdlr = ipa3_odl_dpl_rx_pyld_hdlr; sys->get_skb = ipa3_get_skb_ipa_rx; sys->free_skb = ipa3_free_skb_rx; sys->free_rx_wrapper = ipa3_recycle_rx_wrapper; sys->repl_hdlr = ipa3_replenish_rx_cache_recycle; sys->rx_pool_sz = in->desc_fifo_sz / IPA_FIFO_ELEMENT_SIZE - 1; } else { WARN(1, "Need to install a RX pipe hdlr\n"); return -EINVAL; } } return 0; } /** * ipa3_tx_client_rx_notify_release() - Callback function * which will call the user supplied callback function to * release the skb, or release it on its own if no callback * function was supplied * * @user1: [in] - Data Descriptor * @user2: [in] - endpoint idx * * This notified callback is for the destination client * This function is supplied in ipa3_tx_dp_mul */ static void ipa3_tx_client_rx_notify_release(void *user1, int user2) { struct ipa_tx_data_desc *dd = (struct ipa_tx_data_desc *)user1; int ep_idx = user2; IPADBG_LOW("Received data desc anchor:%pK\n", dd); atomic_inc(&ipa3_ctx->ep[ep_idx].avail_fifo_desc); ipa3_ctx->ep[ep_idx].wstats.rx_pkts_status_rcvd++; /* wlan host driver waits till tx complete before unload */ IPADBG_LOW("ep=%d fifo_desc_free_count=%d\n", ep_idx, atomic_read(&ipa3_ctx->ep[ep_idx].avail_fifo_desc)); IPADBG_LOW("calling client notify callback with priv:%pK\n", ipa3_ctx->ep[ep_idx].priv); if (ipa3_ctx->ep[ep_idx].client_notify) { ipa3_ctx->ep[ep_idx].client_notify(ipa3_ctx->ep[ep_idx].priv, IPA_WRITE_DONE, (unsigned long)user1); ipa3_ctx->ep[ep_idx].wstats.rx_hd_reply++; } } /** * ipa3_tx_client_rx_pkt_status() - Callback function * which will call the user supplied callback function to * increase the available fifo descriptor * * @user1: [in] - Data Descriptor * @user2: [in] - endpoint idx * * This notified callback is for the destination client * This function is supplied in ipa3_tx_dp_mul */ static void ipa3_tx_client_rx_pkt_status(void *user1, int user2) { int ep_idx = user2; atomic_inc(&ipa3_ctx->ep[ep_idx].avail_fifo_desc); ipa3_ctx->ep[ep_idx].wstats.rx_pkts_status_rcvd++; } /** * ipa3_tx_dp_mul() - Data-path tx handler for multiple packets * @src: [in] - Client that is sending data * @ipa_tx_data_desc: [in] data descriptors from wlan * * this is used for to transfer data descriptors that received * from WLAN1_PROD pipe to IPA HW * * The function will send data descriptors from WLAN1_PROD (one * at a time). Will set EOT flag for last descriptor Once this send was done * from transport point-of-view the IPA driver will get notified by the * supplied callback - ipa_gsi_irq_tx_notify_cb() * * ipa_gsi_irq_tx_notify_cb will call to the user supplied callback * * Returns: 0 on success, negative on failure */ int ipa3_tx_dp_mul(enum ipa_client_type src, struct ipa_tx_data_desc *data_desc) { /* The second byte in wlan header holds qmap id */ #define IPA_WLAN_HDR_QMAP_ID_OFFSET 1 struct ipa_tx_data_desc *entry; struct ipa3_sys_context *sys; struct ipa3_desc desc[2]; u32 num_desc, cnt; int ep_idx; IPADBG_LOW("Received data desc anchor:%pK\n", data_desc); spin_lock_bh(&ipa3_ctx->wc_memb.ipa_tx_mul_spinlock); ep_idx = ipa3_get_ep_mapping(src); if (unlikely(ep_idx == -1)) { IPAERR("dest EP does not exist.\n"); goto fail_send; } IPADBG_LOW("ep idx:%d\n", ep_idx); sys = ipa3_ctx->ep[ep_idx].sys; if (unlikely(ipa3_ctx->ep[ep_idx].valid == 0)) { IPAERR("dest EP not valid.\n"); goto fail_send; } sys->ep->wstats.rx_hd_rcvd++; /* Calculate the number of descriptors */ num_desc = 0; list_for_each_entry(entry, &data_desc->link, link) { num_desc++; } IPADBG_LOW("Number of Data Descriptors:%d", num_desc); if (atomic_read(&sys->ep->avail_fifo_desc) < num_desc) { IPAERR("Insufficient data descriptors available\n"); goto fail_send; } /* Assign callback only for last data descriptor */ cnt = 0; list_for_each_entry(entry, &data_desc->link, link) { memset(desc, 0, 2 * sizeof(struct ipa3_desc)); IPADBG_LOW("Parsing data desc :%d\n", cnt); cnt++; ((u8 *)entry->pyld_buffer)[IPA_WLAN_HDR_QMAP_ID_OFFSET] = (u8)sys->ep->cfg.meta.qmap_id; /* the tag field will be populated in ipa3_send() function */ desc[0].is_tag_status = true; desc[1].pyld = entry->pyld_buffer; desc[1].len = entry->pyld_len; desc[1].type = IPA_DATA_DESC_SKB; desc[1].user1 = data_desc; desc[1].user2 = ep_idx; IPADBG_LOW("priv:%pK pyld_buf:0x%pK pyld_len:%d\n", entry->priv, desc[1].pyld, desc[1].len); /* In case of last descriptor populate callback */ if (cnt == num_desc) { IPADBG_LOW("data desc:%pK\n", data_desc); desc[1].callback = ipa3_tx_client_rx_notify_release; } else { desc[1].callback = ipa3_tx_client_rx_pkt_status; } IPADBG_LOW("calling ipa3_send()\n"); if (ipa3_send(sys, 2, desc, true)) { IPAERR("fail to send skb\n"); sys->ep->wstats.rx_pkt_leak += (cnt-1); sys->ep->wstats.rx_dp_fail++; goto fail_send; } if (atomic_read(&sys->ep->avail_fifo_desc) >= 0) atomic_dec(&sys->ep->avail_fifo_desc); sys->ep->wstats.rx_pkts_rcvd++; IPADBG_LOW("ep=%d fifo desc=%d\n", ep_idx, atomic_read(&sys->ep->avail_fifo_desc)); } sys->ep->wstats.rx_hd_processed++; spin_unlock_bh(&ipa3_ctx->wc_memb.ipa_tx_mul_spinlock); return 0; fail_send: spin_unlock_bh(&ipa3_ctx->wc_memb.ipa_tx_mul_spinlock); return -EFAULT; } void ipa3_free_skb(struct ipa_rx_data *data) { struct ipa3_rx_pkt_wrapper *rx_pkt; spin_lock_bh(&ipa3_ctx->wc_memb.wlan_spinlock); ipa3_ctx->wc_memb.total_tx_pkts_freed++; rx_pkt = container_of(data, struct ipa3_rx_pkt_wrapper, data); ipa3_skb_recycle(rx_pkt->data.skb); (void)skb_put(rx_pkt->data.skb, IPA_WLAN_RX_BUFF_SZ); list_add_tail(&rx_pkt->link, &ipa3_ctx->wc_memb.wlan_comm_desc_list); ipa3_ctx->wc_memb.wlan_comm_free_cnt++; spin_unlock_bh(&ipa3_ctx->wc_memb.wlan_spinlock); } /* Functions added to support kernel tests */ int ipa3_sys_setup(struct ipa_sys_connect_params *sys_in, unsigned long *ipa_transport_hdl, u32 *ipa_pipe_num, u32 *clnt_hdl, bool en_status) { struct ipa3_ep_context *ep; int ipa_ep_idx; int result = -EINVAL; if (sys_in == NULL || clnt_hdl == NULL) { IPAERR("NULL args\n"); goto fail_gen; } if (ipa_transport_hdl == NULL || ipa_pipe_num == NULL) { IPAERR("NULL args\n"); goto fail_gen; } if (sys_in->client >= IPA_CLIENT_MAX) { IPAERR("bad parm client:%d\n", sys_in->client); goto fail_gen; } ipa_ep_idx = ipa3_get_ep_mapping(sys_in->client); if (ipa_ep_idx == -1) { IPAERR("Invalid client :%d\n", sys_in->client); goto fail_gen; } ep = &ipa3_ctx->ep[ipa_ep_idx]; IPA_ACTIVE_CLIENTS_INC_EP(sys_in->client); if (ep->valid == 1) { if (sys_in->client != IPA_CLIENT_APPS_WAN_PROD) { IPAERR("EP %d already allocated\n", ipa_ep_idx); goto fail_and_disable_clocks; } else { if (ipa3_cfg_ep_hdr(ipa_ep_idx, &sys_in->ipa_ep_cfg.hdr)) { IPAERR("fail to configure hdr prop of EP %d\n", ipa_ep_idx); result = -EFAULT; goto fail_and_disable_clocks; } if (ipa3_cfg_ep_hdr_ext(ipa_ep_idx, &sys_in->ipa_ep_cfg.hdr_ext)) { IPAERR("fail config hdr_ext prop of EP %d\n", ipa_ep_idx); result = -EFAULT; goto fail_and_disable_clocks; } if (ipa3_cfg_ep_cfg(ipa_ep_idx, &sys_in->ipa_ep_cfg.cfg)) { IPAERR("fail to configure cfg prop of EP %d\n", ipa_ep_idx); result = -EFAULT; goto fail_and_disable_clocks; } IPAERR("client %d (ep: %d) overlay ok sys=%pK\n", sys_in->client, ipa_ep_idx, ep->sys); ep->client_notify = sys_in->notify; ep->priv = sys_in->priv; *clnt_hdl = ipa_ep_idx; if (!ep->keep_ipa_awake) IPA_ACTIVE_CLIENTS_DEC_EP(sys_in->client); return 0; } } memset(ep, 0, offsetof(struct ipa3_ep_context, sys)); ep->valid = 1; ep->client = sys_in->client; ep->client_notify = sys_in->notify; ep->priv = sys_in->priv; ep->keep_ipa_awake = true; if (en_status) { ep->status.status_en = true; ep->status.status_ep = ipa_ep_idx; } result = ipa3_enable_data_path(ipa_ep_idx); if (result) { IPAERR("enable data path failed res=%d clnt=%d.\n", result, ipa_ep_idx); goto fail_gen2; } if (!ep->skip_ep_cfg) { if (ipa3_cfg_ep(ipa_ep_idx, &sys_in->ipa_ep_cfg)) { IPAERR("fail to configure EP.\n"); goto fail_gen2; } if (ipa3_cfg_ep_status(ipa_ep_idx, &ep->status)) { IPAERR("fail to configure status of EP.\n"); goto fail_gen2; } IPADBG("ep configuration successful\n"); } else { IPADBG("skipping ep configuration\n"); } *clnt_hdl = ipa_ep_idx; *ipa_pipe_num = ipa_ep_idx; *ipa_transport_hdl = ipa3_ctx->gsi_dev_hdl; if (!ep->keep_ipa_awake) IPA_ACTIVE_CLIENTS_DEC_EP(sys_in->client); ipa3_ctx->skip_ep_cfg_shadow[ipa_ep_idx] = ep->skip_ep_cfg; IPADBG("client %d (ep: %d) connected sys=%pK\n", sys_in->client, ipa_ep_idx, ep->sys); return 0; fail_gen2: fail_and_disable_clocks: IPA_ACTIVE_CLIENTS_DEC_EP(sys_in->client); fail_gen: return result; } int ipa3_sys_teardown(u32 clnt_hdl) { struct ipa3_ep_context *ep; if (clnt_hdl >= ipa3_ctx->ipa_num_pipes || ipa3_ctx->ep[clnt_hdl].valid == 0) { IPAERR("bad parm(Either endpoint or client hdl invalid)\n"); return -EINVAL; } ep = &ipa3_ctx->ep[clnt_hdl]; if (!ep->keep_ipa_awake) IPA_ACTIVE_CLIENTS_INC_EP(ipa3_get_client_mapping(clnt_hdl)); ipa3_disable_data_path(clnt_hdl); ep->valid = 0; IPA_ACTIVE_CLIENTS_DEC_EP(ipa3_get_client_mapping(clnt_hdl)); IPADBG("client (ep: %d) disconnected\n", clnt_hdl); return 0; } int ipa3_sys_update_gsi_hdls(u32 clnt_hdl, unsigned long gsi_ch_hdl, unsigned long gsi_ev_hdl) { struct ipa3_ep_context *ep; if (clnt_hdl >= ipa3_ctx->ipa_num_pipes || ipa3_ctx->ep[clnt_hdl].valid == 0) { IPAERR("bad parm(Either endpoint or client hdl invalid)\n"); return -EINVAL; } ep = &ipa3_ctx->ep[clnt_hdl]; ep->gsi_chan_hdl = gsi_ch_hdl; ep->gsi_evt_ring_hdl = gsi_ev_hdl; return 0; } static void ipa_gsi_evt_ring_err_cb(struct gsi_evt_err_notify *notify) { switch (notify->evt_id) { case GSI_EVT_OUT_OF_BUFFERS_ERR: IPAERR("Got GSI_EVT_OUT_OF_BUFFERS_ERR\n"); break; case GSI_EVT_OUT_OF_RESOURCES_ERR: IPAERR("Got GSI_EVT_OUT_OF_RESOURCES_ERR\n"); break; case GSI_EVT_UNSUPPORTED_INTER_EE_OP_ERR: IPAERR("Got GSI_EVT_UNSUPPORTED_INTER_EE_OP_ERR\n"); break; case GSI_EVT_EVT_RING_EMPTY_ERR: IPAERR("Got GSI_EVT_EVT_RING_EMPTY_ERR\n"); break; default: IPAERR("Unexpected err evt: %d\n", notify->evt_id); } } static void ipa_gsi_chan_err_cb(struct gsi_chan_err_notify *notify) { switch (notify->evt_id) { case GSI_CHAN_INVALID_TRE_ERR: IPAERR("Got GSI_CHAN_INVALID_TRE_ERR\n"); break; case GSI_CHAN_NON_ALLOCATED_EVT_ACCESS_ERR: IPAERR("Got GSI_CHAN_NON_ALLOCATED_EVT_ACCESS_ERR\n"); break; case GSI_CHAN_OUT_OF_BUFFERS_ERR: IPAERR("Got GSI_CHAN_OUT_OF_BUFFERS_ERR\n"); break; case GSI_CHAN_OUT_OF_RESOURCES_ERR: IPAERR("Got GSI_CHAN_OUT_OF_RESOURCES_ERR\n"); break; case GSI_CHAN_UNSUPPORTED_INTER_EE_OP_ERR: IPAERR("Got GSI_CHAN_UNSUPPORTED_INTER_EE_OP_ERR\n"); break; case GSI_CHAN_HWO_1_ERR: IPAERR("Got GSI_CHAN_HWO_1_ERR\n"); break; default: IPAERR("Unexpected err evt: %d\n", notify->evt_id); } } static void ipa_gsi_irq_tx_notify_cb(struct gsi_chan_xfer_notify *notify) { struct ipa3_tx_pkt_wrapper *tx_pkt; IPADBG_LOW("event %d notified\n", notify->evt_id); switch (notify->evt_id) { case GSI_CHAN_EVT_EOT: atomic_set(&ipa3_ctx->transport_pm.eot_activity, 1); tx_pkt = notify->xfer_user_data; tx_pkt->xmit_done = true; atomic_inc(&tx_pkt->sys->xmit_eot_cnt); tasklet_schedule(&tx_pkt->sys->tasklet); break; default: IPAERR("received unexpected event id %d\n", notify->evt_id); } } void __ipa_gsi_irq_rx_scedule_poll(struct ipa3_sys_context *sys) { bool clk_off = true; enum ipa_client_type client_type; atomic_set(&sys->curr_polling_state, 1); __ipa3_update_curr_poll_state(sys->ep->client, 1); ipa3_inc_acquire_wakelock(); /* * Mark client as WAN_COAL_CONS only as * NAPI only use sys of WAN_COAL_CONS. */ if (IPA_CLIENT_IS_WAN_CONS(sys->ep->client)) client_type = IPA_CLIENT_APPS_WAN_COAL_CONS; else client_type = sys->ep->client; /* * Have race condition to use PM on poll to isr * switch. Use the active no block instead * where we would have ref counts. */ if (sys->napi_obj) clk_off = IPA_ACTIVE_CLIENTS_INC_EP_NO_BLOCK(client_type); if (!clk_off && sys->napi_obj) { napi_schedule(sys->napi_obj); IPA_STATS_INC_CNT(sys->napi_sch_cnt); return; } queue_work(sys->wq, &sys->work); return; } static void ipa_gsi_irq_rx_notify_cb(struct gsi_chan_xfer_notify *notify) { struct ipa3_sys_context *sys; if (unlikely(!notify)) { IPAERR("gsi notify is NULL.\n"); return; } IPADBG_LOW("event %d notified\n", notify->evt_id); sys = (struct ipa3_sys_context *)notify->chan_user_data; /* * In suspend just before stopping the channel possible to receive * the IEOB interrupt and xfer pointer will not be processed in this * mode and moving channel poll mode. In resume after starting the * channel will receive the IEOB interrupt and xfer pointer will be * overwritten. To avoid this process all data in polling context. */ sys->ep->xfer_notify_valid = false; sys->ep->xfer_notify = *notify; switch (notify->evt_id) { case GSI_CHAN_EVT_EOT: case GSI_CHAN_EVT_EOB: atomic_set(&ipa3_ctx->transport_pm.eot_activity, 1); if (!atomic_read(&sys->curr_polling_state)) { /* put the gsi channel into polling mode */ gsi_config_channel_mode(sys->ep->gsi_chan_hdl, GSI_CHAN_MODE_POLL); __ipa_gsi_irq_rx_scedule_poll(sys); } break; default: IPAERR("received unexpected event id %d\n", notify->evt_id); } } static void ipa_dma_gsi_irq_rx_notify_cb(struct gsi_chan_xfer_notify *notify) { struct ipa3_sys_context *sys; if (unlikely(!notify)) { IPAERR("gsi notify is NULL.\n"); return; } IPADBG_LOW("event %d notified\n", notify->evt_id); sys = (struct ipa3_sys_context *)notify->chan_user_data; if (sys->ep->client == IPA_CLIENT_MEMCPY_DMA_SYNC_CONS) { IPAERR("IRQ_RX Callback was called for DMA_SYNC_CONS.\n"); return; } sys->ep->xfer_notify_valid = false; sys->ep->xfer_notify = *notify; switch (notify->evt_id) { case GSI_CHAN_EVT_EOT: if (!atomic_read(&sys->curr_polling_state)) { /* put the gsi channel into polling mode */ gsi_config_channel_mode(sys->ep->gsi_chan_hdl, GSI_CHAN_MODE_POLL); ipa3_inc_acquire_wakelock(); atomic_set(&sys->curr_polling_state, 1); queue_work(sys->wq, &sys->work); } break; default: IPAERR("received unexpected event id %d\n", notify->evt_id); } } int ipa3_alloc_common_event_ring(void) { struct gsi_evt_ring_props gsi_evt_ring_props; dma_addr_t evt_dma_addr; int result; memset(&gsi_evt_ring_props, 0, sizeof(gsi_evt_ring_props)); gsi_evt_ring_props.intf = GSI_EVT_CHTYPE_GPI_EV; gsi_evt_ring_props.intr = GSI_INTR_IRQ; gsi_evt_ring_props.re_size = GSI_EVT_RING_RE_SIZE_16B; gsi_evt_ring_props.ring_len = IPA_COMMON_EVENT_RING_SIZE; gsi_evt_ring_props.ring_base_vaddr = dma_alloc_coherent(ipa3_ctx->pdev, gsi_evt_ring_props.ring_len, &evt_dma_addr, GFP_KERNEL); if (!gsi_evt_ring_props.ring_base_vaddr) { IPAERR("fail to dma alloc %u bytes\n", gsi_evt_ring_props.ring_len); return -ENOMEM; } gsi_evt_ring_props.ring_base_addr = evt_dma_addr; gsi_evt_ring_props.int_modt = 0; gsi_evt_ring_props.int_modc = 1; /* moderation comes from channel*/ gsi_evt_ring_props.rp_update_addr = 0; gsi_evt_ring_props.exclusive = false; gsi_evt_ring_props.err_cb = ipa_gsi_evt_ring_err_cb; gsi_evt_ring_props.user_data = NULL; result = gsi_alloc_evt_ring(&gsi_evt_ring_props, ipa3_ctx->gsi_dev_hdl, &ipa3_ctx->gsi_evt_comm_hdl); if (result) { IPAERR("gsi_alloc_evt_ring failed %d\n", result); return result; } ipa3_ctx->gsi_evt_comm_ring_rem = IPA_COMMON_EVENT_RING_SIZE; return 0; } static int ipa_gsi_setup_channel(struct ipa_sys_connect_params *in, struct ipa3_ep_context *ep) { u32 ring_size; int result; gfp_t mem_flag = GFP_KERNEL; u32 coale_ep_idx; if (in->client == IPA_CLIENT_APPS_WAN_CONS || in->client == IPA_CLIENT_APPS_WAN_COAL_CONS || in->client == IPA_CLIENT_APPS_WAN_PROD) mem_flag = GFP_ATOMIC; if (!ep) { IPAERR("EP context is empty\n"); return -EINVAL; } coale_ep_idx = ipa3_get_ep_mapping(IPA_CLIENT_APPS_WAN_COAL_CONS); /* * GSI ring length is calculated based on the desc_fifo_sz * which was meant to define the BAM desc fifo. GSI descriptors * are 16B as opposed to 8B for BAM. */ ring_size = 2 * in->desc_fifo_sz; ep->gsi_evt_ring_hdl = ~0; if (ep->sys->use_comm_evt_ring) { if (ipa3_ctx->gsi_evt_comm_ring_rem < ring_size) { IPAERR("not enough space in common event ring\n"); IPAERR("available: %d needed: %d\n", ipa3_ctx->gsi_evt_comm_ring_rem, ring_size); WARN_ON(1); return -EFAULT; } ipa3_ctx->gsi_evt_comm_ring_rem -= (ring_size); ep->gsi_evt_ring_hdl = ipa3_ctx->gsi_evt_comm_hdl; } else if (in->client == IPA_CLIENT_APPS_WAN_COAL_CONS) { result = ipa_gsi_setup_event_ring(ep, IPA_COMMON_EVENT_RING_SIZE, mem_flag); if (result) goto fail_setup_event_ring; } else if (in->client == IPA_CLIENT_APPS_WAN_CONS && coale_ep_idx != IPA_EP_NOT_ALLOCATED && ipa3_ctx->ep[coale_ep_idx].valid == 1) { IPADBG("Wan consumer pipe configured\n"); result = ipa_gsi_setup_coal_def_channel(in, ep, &ipa3_ctx->ep[coale_ep_idx]); if (result) { IPAERR("Failed to setup default coal GSI channel\n"); goto fail_setup_event_ring; } return result; } else if (ep->sys->policy != IPA_POLICY_NOINTR_MODE || IPA_CLIENT_IS_CONS(ep->client)) { result = ipa_gsi_setup_event_ring(ep, ring_size, mem_flag); if (result) goto fail_setup_event_ring; } result = ipa_gsi_setup_transfer_ring(ep, ring_size, ep->sys, mem_flag); if (result) goto fail_setup_transfer_ring; if (ep->client == IPA_CLIENT_MEMCPY_DMA_SYNC_CONS) gsi_config_channel_mode(ep->gsi_chan_hdl, GSI_CHAN_MODE_POLL); return 0; fail_setup_transfer_ring: if (ep->gsi_mem_info.evt_ring_base_vaddr) dma_free_coherent(ipa3_ctx->pdev, ep->gsi_mem_info.evt_ring_len, ep->gsi_mem_info.evt_ring_base_vaddr, ep->gsi_mem_info.evt_ring_base_addr); fail_setup_event_ring: IPAERR("Return with err: %d\n", result); return result; } static int ipa_gsi_setup_event_ring(struct ipa3_ep_context *ep, u32 ring_size, gfp_t mem_flag) { struct gsi_evt_ring_props gsi_evt_ring_props; dma_addr_t evt_dma_addr; int result; evt_dma_addr = 0; memset(&gsi_evt_ring_props, 0, sizeof(gsi_evt_ring_props)); gsi_evt_ring_props.intf = GSI_EVT_CHTYPE_GPI_EV; gsi_evt_ring_props.intr = GSI_INTR_IRQ; gsi_evt_ring_props.re_size = GSI_EVT_RING_RE_SIZE_16B; gsi_evt_ring_props.ring_len = ring_size; gsi_evt_ring_props.ring_base_vaddr = dma_alloc_coherent(ipa3_ctx->pdev, gsi_evt_ring_props.ring_len, &evt_dma_addr, mem_flag); if (!gsi_evt_ring_props.ring_base_vaddr) { IPAERR("fail to dma alloc %u bytes\n", gsi_evt_ring_props.ring_len); return -ENOMEM; } gsi_evt_ring_props.ring_base_addr = evt_dma_addr; /* copy mem info */ ep->gsi_mem_info.evt_ring_len = gsi_evt_ring_props.ring_len; ep->gsi_mem_info.evt_ring_base_addr = gsi_evt_ring_props.ring_base_addr; ep->gsi_mem_info.evt_ring_base_vaddr = gsi_evt_ring_props.ring_base_vaddr; if (ep->sys->napi_obj) { gsi_evt_ring_props.int_modt = IPA_GSI_EVT_RING_INT_MODT; gsi_evt_ring_props.int_modc = IPA_GSI_EVT_RING_INT_MODC; } else { gsi_evt_ring_props.int_modt = IPA_GSI_EVT_RING_INT_MODT; gsi_evt_ring_props.int_modc = 1; } IPADBG("client=%d moderation threshold cycles=%u cnt=%u\n", ep->client, gsi_evt_ring_props.int_modt, gsi_evt_ring_props.int_modc); gsi_evt_ring_props.rp_update_addr = 0; gsi_evt_ring_props.exclusive = true; gsi_evt_ring_props.err_cb = ipa_gsi_evt_ring_err_cb; gsi_evt_ring_props.user_data = NULL; result = gsi_alloc_evt_ring(&gsi_evt_ring_props, ipa3_ctx->gsi_dev_hdl, &ep->gsi_evt_ring_hdl); if (result != GSI_STATUS_SUCCESS) goto fail_alloc_evt_ring; return 0; fail_alloc_evt_ring: if (ep->gsi_mem_info.evt_ring_base_vaddr) dma_free_coherent(ipa3_ctx->pdev, ep->gsi_mem_info.evt_ring_len, ep->gsi_mem_info.evt_ring_base_vaddr, ep->gsi_mem_info.evt_ring_base_addr); IPAERR("Return with err: %d\n", result); return result; } static int ipa_gsi_setup_transfer_ring(struct ipa3_ep_context *ep, u32 ring_size, struct ipa3_sys_context *user_data, gfp_t mem_flag) { dma_addr_t dma_addr; union gsi_channel_scratch ch_scratch; struct gsi_chan_props gsi_channel_props; const struct ipa_gsi_ep_config *gsi_ep_info; int result; memset(&gsi_channel_props, 0, sizeof(gsi_channel_props)); if (ep->client == IPA_CLIENT_APPS_WAN_COAL_CONS) gsi_channel_props.prot = GSI_CHAN_PROT_GCI; else gsi_channel_props.prot = GSI_CHAN_PROT_GPI; if (IPA_CLIENT_IS_PROD(ep->client)) { gsi_channel_props.dir = GSI_CHAN_DIR_TO_GSI; } else { gsi_channel_props.dir = GSI_CHAN_DIR_FROM_GSI; gsi_channel_props.max_re_expected = ep->sys->rx_pool_sz; } gsi_ep_info = ipa3_get_gsi_ep_info(ep->client); if (!gsi_ep_info) { IPAERR("Failed getting GSI EP info for client=%d\n", ep->client); result = -EINVAL; goto fail_get_gsi_ep_info; } else { gsi_channel_props.ch_id = gsi_ep_info->ipa_gsi_chan_num; } gsi_channel_props.evt_ring_hdl = ep->gsi_evt_ring_hdl; gsi_channel_props.re_size = GSI_CHAN_RE_SIZE_16B; gsi_channel_props.ring_len = ring_size; gsi_channel_props.ring_base_vaddr = dma_alloc_coherent(ipa3_ctx->pdev, gsi_channel_props.ring_len, &dma_addr, mem_flag); if (!gsi_channel_props.ring_base_vaddr) { IPAERR("fail to dma alloc %u bytes\n", gsi_channel_props.ring_len); result = -ENOMEM; goto fail_alloc_channel_ring; } gsi_channel_props.ring_base_addr = dma_addr; /* copy mem info */ ep->gsi_mem_info.chan_ring_len = gsi_channel_props.ring_len; ep->gsi_mem_info.chan_ring_base_addr = gsi_channel_props.ring_base_addr; ep->gsi_mem_info.chan_ring_base_vaddr = gsi_channel_props.ring_base_vaddr; if (ipa3_ctx->ipa_hw_type >= IPA_HW_v4_0) gsi_channel_props.use_db_eng = GSI_CHAN_DIRECT_MODE; else gsi_channel_props.use_db_eng = GSI_CHAN_DB_MODE; gsi_channel_props.max_prefetch = GSI_ONE_PREFETCH_SEG; if (ep->client == IPA_CLIENT_APPS_CMD_PROD) gsi_channel_props.low_weight = IPA_GSI_MAX_CH_LOW_WEIGHT; else gsi_channel_props.low_weight = 1; gsi_channel_props.prefetch_mode = gsi_ep_info->prefetch_mode; gsi_channel_props.empty_lvl_threshold = gsi_ep_info->prefetch_threshold; gsi_channel_props.chan_user_data = user_data; gsi_channel_props.err_cb = ipa_gsi_chan_err_cb; if (IPA_CLIENT_IS_PROD(ep->client)) gsi_channel_props.xfer_cb = ipa_gsi_irq_tx_notify_cb; else gsi_channel_props.xfer_cb = ipa_gsi_irq_rx_notify_cb; if (IPA_CLIENT_IS_MEMCPY_DMA_CONS(ep->client)) gsi_channel_props.xfer_cb = ipa_dma_gsi_irq_rx_notify_cb; if (IPA_CLIENT_IS_CONS(ep->client)) gsi_channel_props.cleanup_cb = free_rx_pkt; /* overwrite the cleanup_cb for page recycling */ if (ipa3_ctx->ipa_wan_skb_page && (IPA_CLIENT_IS_WAN_CONS(ep->client))) gsi_channel_props.cleanup_cb = free_rx_page; result = gsi_alloc_channel(&gsi_channel_props, ipa3_ctx->gsi_dev_hdl, &ep->gsi_chan_hdl); if (result != GSI_STATUS_SUCCESS) { IPAERR("Failed to alloc GSI chan.\n"); goto fail_alloc_channel; } memset(&ch_scratch, 0, sizeof(ch_scratch)); /* * Update scratch for MCS smart prefetch: * Starting IPA4.5, smart prefetch implemented by H/W. * At IPA 4.0/4.1/4.2, we do not use MCS smart prefetch * so keep the fields zero. */ if (ipa3_ctx->ipa_hw_type < IPA_HW_v4_0) { ch_scratch.gpi.max_outstanding_tre = gsi_ep_info->ipa_if_tlv * GSI_CHAN_RE_SIZE_16B; ch_scratch.gpi.outstanding_threshold = 2 * GSI_CHAN_RE_SIZE_16B; } if (ipa3_ctx->ipa_hw_type >= IPA_HW_v4_5) ch_scratch.gpi.dl_nlo_channel = 0; result = gsi_write_channel_scratch(ep->gsi_chan_hdl, ch_scratch); if (result != GSI_STATUS_SUCCESS) { IPAERR("failed to write scratch %d\n", result); goto fail_write_channel_scratch; } return 0; fail_write_channel_scratch: if (gsi_dealloc_channel(ep->gsi_chan_hdl) != GSI_STATUS_SUCCESS) { IPAERR("Failed to dealloc GSI chan.\n"); WARN_ON(1); } fail_alloc_channel: dma_free_coherent(ipa3_ctx->pdev, ep->gsi_mem_info.chan_ring_len, ep->gsi_mem_info.chan_ring_base_vaddr, ep->gsi_mem_info.chan_ring_base_addr); fail_alloc_channel_ring: fail_get_gsi_ep_info: if (ep->gsi_evt_ring_hdl != ~0) { gsi_dealloc_evt_ring(ep->gsi_evt_ring_hdl); ep->gsi_evt_ring_hdl = ~0; } return result; } static int ipa_gsi_setup_coal_def_channel(struct ipa_sys_connect_params *in, struct ipa3_ep_context *ep, struct ipa3_ep_context *coal_ep) { u32 ring_size; int result; ring_size = 2 * in->desc_fifo_sz; /* copy event ring handle */ ep->gsi_evt_ring_hdl = coal_ep->gsi_evt_ring_hdl; result = ipa_gsi_setup_transfer_ring(ep, ring_size, coal_ep->sys, GFP_ATOMIC); if (result) { if (ep->gsi_mem_info.evt_ring_base_vaddr) dma_free_coherent(ipa3_ctx->pdev, ep->gsi_mem_info.chan_ring_len, ep->gsi_mem_info.chan_ring_base_vaddr, ep->gsi_mem_info.chan_ring_base_addr); IPAERR("Destroying WAN_COAL_CONS evt_ring"); if (ep->gsi_evt_ring_hdl != ~0) { gsi_dealloc_evt_ring(ep->gsi_evt_ring_hdl); ep->gsi_evt_ring_hdl = ~0; } IPAERR("Return with err: %d\n", result); return result; } return 0; } static int ipa_populate_tag_field(struct ipa3_desc *desc, struct ipa3_tx_pkt_wrapper *tx_pkt, struct ipahal_imm_cmd_pyld **tag_pyld_ret) { struct ipahal_imm_cmd_pyld *tag_pyld; struct ipahal_imm_cmd_ip_packet_tag_status tag_cmd = {0}; /* populate tag field only if it is NULL */ if (desc->pyld == NULL) { tag_cmd.tag = pointer_to_tag_wa(tx_pkt); tag_pyld = ipahal_construct_imm_cmd( IPA_IMM_CMD_IP_PACKET_TAG_STATUS, &tag_cmd, true); if (unlikely(!tag_pyld)) { IPAERR("Failed to construct ip_packet_tag_status\n"); return -EFAULT; } /* * This is for 32-bit pointer, will need special * handling if 64-bit pointer is used */ IPADBG_LOW("tx_pkt sent in tag: 0x%pK\n", tx_pkt); desc->pyld = tag_pyld->data; desc->opcode = tag_pyld->opcode; desc->len = tag_pyld->len; desc->user1 = tag_pyld; desc->type = IPA_IMM_CMD_DESC; desc->callback = ipa3_tag_destroy_imm; *tag_pyld_ret = tag_pyld; } return 0; } static int ipa_poll_gsi_pkt(struct ipa3_sys_context *sys, struct gsi_chan_xfer_notify *notify) { int unused_var; return ipa_poll_gsi_n_pkt(sys, notify, 1, &unused_var); } static int ipa_poll_gsi_n_pkt(struct ipa3_sys_context *sys, struct gsi_chan_xfer_notify *notify, int expected_num, int *actual_num) { int ret; int idx = 0; int poll_num = 0; if (!actual_num || expected_num <= 0 || expected_num > IPA_WAN_NAPI_MAX_FRAMES) { IPAERR("bad params actual_num=%pK expected_num=%d\n", actual_num, expected_num); return GSI_STATUS_INVALID_PARAMS; } if (sys->ep->xfer_notify_valid) { *notify = sys->ep->xfer_notify; sys->ep->xfer_notify_valid = false; idx++; } if (expected_num == idx) { *actual_num = idx; return GSI_STATUS_SUCCESS; } ret = gsi_poll_n_channel(sys->ep->gsi_chan_hdl, ¬ify[idx], expected_num - idx, &poll_num); if (ret == GSI_STATUS_POLL_EMPTY) { if (idx) { *actual_num = idx; return GSI_STATUS_SUCCESS; } *actual_num = 0; return ret; } else if (ret != GSI_STATUS_SUCCESS) { if (idx) { *actual_num = idx; return GSI_STATUS_SUCCESS; } *actual_num = 0; IPAERR("Poll channel err: %d\n", ret); return ret; } *actual_num = idx + poll_num; return ret; } /** * ipa3_lan_rx_poll() - Poll the LAN rx packets from IPA HW. * This function is executed in the softirq context * * if input budget is zero, the driver switches back to * interrupt mode. * * return number of polled packets, on error 0(zero) */ int ipa3_lan_rx_poll(u32 clnt_hdl, int weight) { struct ipa3_ep_context *ep; int ret; int cnt = 0; int remain_aggr_weight; struct gsi_chan_xfer_notify notify; if (unlikely(clnt_hdl >= ipa3_ctx->ipa_num_pipes || ipa3_ctx->ep[clnt_hdl].valid == 0)) { IPAERR("bad param 0x%x\n", clnt_hdl); return cnt; } remain_aggr_weight = weight / IPA_LAN_AGGR_PKT_CNT; if (unlikely(remain_aggr_weight > IPA_LAN_NAPI_MAX_FRAMES)) { IPAERR("NAPI weight is higher than expected\n"); IPAERR("expected %d got %d\n", IPA_LAN_NAPI_MAX_FRAMES, remain_aggr_weight); return cnt; } ep = &ipa3_ctx->ep[clnt_hdl]; start_poll: /* * it is guaranteed we already have clock here. * This is mainly for clock scaling. */ ipa_pm_activate(ep->sys->pm_hdl); while (remain_aggr_weight > 0 && atomic_read(&ep->sys->curr_polling_state)) { atomic_set(&ipa3_ctx->transport_pm.eot_activity, 1); ret = ipa_poll_gsi_pkt(ep->sys, ¬ify); if (ret) break; if (IPA_CLIENT_IS_MEMCPY_DMA_CONS(ep->client)) ipa3_dma_memcpy_notify(ep->sys); else if (IPA_CLIENT_IS_WLAN_CONS(ep->client)) ipa3_wlan_wq_rx_common(ep->sys, ¬ify); else ipa3_wq_rx_common(ep->sys, ¬ify); remain_aggr_weight--; if (ep->sys->len == 0) { if (remain_aggr_weight == 0) cnt--; break; } } cnt += weight - remain_aggr_weight * IPA_LAN_AGGR_PKT_CNT; if (cnt < weight) { napi_complete(ep->sys->napi_obj); ret = ipa3_rx_switch_to_intr_mode(ep->sys); if (ret == -GSI_STATUS_PENDING_IRQ && napi_reschedule(ep->sys->napi_obj)) goto start_poll; IPA_ACTIVE_CLIENTS_DEC_EP_NO_BLOCK(ep->client); } return cnt; } /** * ipa3_rx_poll() - Poll the WAN rx packets from IPA HW. This * function is exectued in the softirq context * * if input budget is zero, the driver switches back to * interrupt mode. * * return number of polled packets, on error 0(zero) */ int ipa3_rx_poll(u32 clnt_hdl, int weight) { struct ipa3_ep_context *ep; struct ipa3_sys_context *wan_def_sys; int ret; int cnt = 0; int num = 0; int remain_aggr_weight; int ipa_ep_idx; struct ipa_active_client_logging_info log; struct gsi_chan_xfer_notify notify[IPA_WAN_NAPI_MAX_FRAMES]; IPA_ACTIVE_CLIENTS_PREP_SPECIAL(log, "NAPI"); if (clnt_hdl >= ipa3_ctx->ipa_num_pipes || ipa3_ctx->ep[clnt_hdl].valid == 0) { IPAERR("bad parm 0x%x\n", clnt_hdl); return cnt; } ipa_ep_idx = ipa3_get_ep_mapping(IPA_CLIENT_APPS_WAN_CONS); if (ipa_ep_idx == IPA_EP_NOT_ALLOCATED) { IPAERR("Invalid client.\n"); return cnt; } wan_def_sys = ipa3_ctx->ep[ipa_ep_idx].sys; remain_aggr_weight = weight / IPA_WAN_AGGR_PKT_CNT; if (remain_aggr_weight > IPA_WAN_NAPI_MAX_FRAMES) { IPAERR("NAPI weight is higher than expected\n"); IPAERR("expected %d got %d\n", IPA_WAN_NAPI_MAX_FRAMES, remain_aggr_weight); return -EINVAL; } ep = &ipa3_ctx->ep[clnt_hdl]; start_poll: /* * it is guaranteed we already have clock here. * This is mainly for clock scaling. */ ipa_pm_activate(ep->sys->pm_hdl); while (remain_aggr_weight > 0 && atomic_read(&ep->sys->curr_polling_state)) { atomic_set(&ipa3_ctx->transport_pm.eot_activity, 1); if (ipa3_ctx->enable_napi_chain) { ret = ipa_poll_gsi_n_pkt(ep->sys, notify, remain_aggr_weight, &num); } else { ret = ipa_poll_gsi_n_pkt(ep->sys, notify, 1, &num); } if (ret) break; trace_ipa3_rx_poll_num(num); ipa3_rx_napi_chain(ep->sys, notify, num); remain_aggr_weight -= num; trace_ipa3_rx_poll_cnt(ep->sys->len); if (ep->sys->len == 0) { if (remain_aggr_weight == 0) cnt--; break; } } cnt += weight - remain_aggr_weight * IPA_WAN_AGGR_PKT_CNT; /* call repl_hdlr before napi_reschedule / napi_complete */ ep->sys->repl_hdlr(ep->sys); /* When not able to replenish enough descriptors, keep in polling * mode, wait for napi-poll and replenish again. */ if (cnt < weight && ep->sys->len > IPA_DEFAULT_SYS_YELLOW_WM && wan_def_sys->len > IPA_DEFAULT_SYS_YELLOW_WM) { napi_complete(ep->sys->napi_obj); IPA_STATS_INC_CNT(ep->sys->napi_comp_cnt); ret = ipa3_rx_switch_to_intr_mode(ep->sys); if (ret == -GSI_STATUS_PENDING_IRQ && napi_reschedule(ep->sys->napi_obj)) goto start_poll; IPA_ACTIVE_CLIENTS_DEC_EP_NO_BLOCK(ep->client); } else { cnt = weight; IPADBG_LOW("Client = %d not replenished free descripotrs\n", ep->client); } return cnt; } static unsigned long tag_to_pointer_wa(uint64_t tag) { return 0xFFFF000000000000 | (unsigned long) tag; } static uint64_t pointer_to_tag_wa(struct ipa3_tx_pkt_wrapper *tx_pkt) { u16 temp; /* Add the check but it might have throughput issue */ if (BITS_PER_LONG == 64) { temp = (u16) (~((unsigned long) tx_pkt & 0xFFFF000000000000) >> 48); if (temp) { IPAERR("The 16 prefix is not all 1s (%pK)\n", tx_pkt); /* * We need all addresses starting at 0xFFFF to * pass it to HW. */ ipa_assert(); } } return (unsigned long)tx_pkt & 0x0000FFFFFFFFFFFF; } /** * ipa_gsi_ch20_wa() - software workaround for IPA GSI channel 20 * * A hardware limitation requires to avoid using GSI physical channel 20. * This function allocates GSI physical channel 20 and holds it to prevent * others to use it. * * Return codes: 0 on success, negative on failure */ int ipa_gsi_ch20_wa(void) { struct gsi_chan_props gsi_channel_props; dma_addr_t dma_addr; int result; int i; unsigned long chan_hdl[IPA_GSI_CH_20_WA_NUM_CH_TO_ALLOC]; unsigned long chan_hdl_to_keep; memset(&gsi_channel_props, 0, sizeof(gsi_channel_props)); gsi_channel_props.prot = GSI_CHAN_PROT_GPI; gsi_channel_props.dir = GSI_CHAN_DIR_TO_GSI; gsi_channel_props.evt_ring_hdl = ~0; gsi_channel_props.re_size = GSI_CHAN_RE_SIZE_16B; gsi_channel_props.ring_len = 4 * gsi_channel_props.re_size; gsi_channel_props.ring_base_vaddr = dma_alloc_coherent(ipa3_ctx->pdev, gsi_channel_props.ring_len, &dma_addr, 0); gsi_channel_props.ring_base_addr = dma_addr; if (ipa3_ctx->ipa_hw_type >= IPA_HW_v4_0) gsi_channel_props.use_db_eng = GSI_CHAN_DIRECT_MODE; else gsi_channel_props.use_db_eng = GSI_CHAN_DB_MODE; gsi_channel_props.max_prefetch = GSI_ONE_PREFETCH_SEG; gsi_channel_props.low_weight = 1; gsi_channel_props.err_cb = ipa_gsi_chan_err_cb; gsi_channel_props.xfer_cb = ipa_gsi_irq_tx_notify_cb; /* first allocate channels up to channel 20 */ for (i = 0; i < IPA_GSI_CH_20_WA_NUM_CH_TO_ALLOC; i++) { gsi_channel_props.ch_id = i; result = gsi_alloc_channel(&gsi_channel_props, ipa3_ctx->gsi_dev_hdl, &chan_hdl[i]); if (result != GSI_STATUS_SUCCESS) { IPAERR("failed to alloc channel %d err %d\n", i, result); return result; } } /* allocate channel 20 */ gsi_channel_props.ch_id = IPA_GSI_CH_20_WA_VIRT_CHAN; result = gsi_alloc_channel(&gsi_channel_props, ipa3_ctx->gsi_dev_hdl, &chan_hdl_to_keep); if (result != GSI_STATUS_SUCCESS) { IPAERR("failed to alloc channel %d err %d\n", i, result); return result; } /* release all other channels */ for (i = 0; i < IPA_GSI_CH_20_WA_NUM_CH_TO_ALLOC; i++) { result = gsi_dealloc_channel(chan_hdl[i]); if (result != GSI_STATUS_SUCCESS) { IPAERR("failed to dealloc channel %d err %d\n", i, result); return result; } } /* DMA memory shall not be freed as it is used by channel 20 */ return 0; } /** * ipa_adjust_ra_buff_base_sz() * * Return value: the largest power of two which is smaller * than the input value */ static u32 ipa_adjust_ra_buff_base_sz(u32 aggr_byte_limit) { aggr_byte_limit += IPA_MTU; aggr_byte_limit += IPA_GENERIC_RX_BUFF_LIMIT; aggr_byte_limit--; aggr_byte_limit |= aggr_byte_limit >> 1; aggr_byte_limit |= aggr_byte_limit >> 2; aggr_byte_limit |= aggr_byte_limit >> 4; aggr_byte_limit |= aggr_byte_limit >> 8; aggr_byte_limit |= aggr_byte_limit >> 16; aggr_byte_limit++; return aggr_byte_limit >> 1; }