/* Copyright (c) 2012-2017, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and * only version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include #include #include #include #include #include #include "ipa_i.h" #include "ipa_trace.h" #include "ipahal/ipahal.h" #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 /* 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 1 #define IPA_GENERIC_AGGR_PKT_LIMIT 0 #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_SIZE_DL_CSUM_META_TRAILER 8 #define IPA_GSI_EVT_RING_LEN 4096 #define IPA_GSI_MAX_CH_LOW_WEIGHT 15 #define IPA_GSI_EVT_RING_INT_MODT (32 * 1) /* 1ms under 32KHz clock */ #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 10 #define IPA_TX_SEND_COMPL_NOP_DELAY_NS (2 * 1000 * 1000) 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_wq_handle_rx(struct work_struct *work); static void ipa3_wq_handle_tx(struct work_struct *work); static void ipa3_wq_rx_common(struct ipa3_sys_context *sys, u32 size); static void ipa3_wlan_wq_rx_common(struct ipa3_sys_context *sys, u32 size); 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, struct ipa_mem_buffer *mem_info); static int ipa_gsi_setup_channel(struct ipa_sys_connect_params *in, struct ipa3_ep_context *ep); 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_handle_rx_core_gsi(struct ipa3_sys_context *sys, bool process_all, bool in_poll_state); static int ipa_handle_rx_core_sps(struct ipa3_sys_context *sys, bool process_all, bool in_poll_state); 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, next_pkt->mem.phys_base, next_pkt->mem.size, DMA_TO_DEVICE); } } if (tx_pkt->callback) tx_pkt->callback(tx_pkt->user1, tx_pkt->user2); if (ipa3_ctx->transport_prototype == IPA_TRANSPORT_TYPE_SPS && tx_pkt->cnt > 1 && tx_pkt->cnt != IPA_LAST_DESC_CNT) { if (tx_pkt->cnt == IPA_NUM_DESC_PER_SW_TX) { dma_pool_free(ipa3_ctx->dma_pool, tx_pkt->mult.base, tx_pkt->mult.phys_base); } else { dma_unmap_single(ipa3_ctx->pdev, tx_pkt->mult.phys_base, tx_pkt->mult.size, DMA_TO_DEVICE); kfree(tx_pkt->mult.base); } } 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); } /** * ipa_write_done() - this function will be (eventually) called when a Tx * operation is complete * * @work: work_struct used by the work queue * * 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) * - return the tx buffer back to dma_pool */ static void ipa3_wq_write_done(struct work_struct *work) { struct ipa3_tx_pkt_wrapper *tx_pkt; struct ipa3_sys_context *sys; struct ipa3_tx_pkt_wrapper *this_pkt; tx_pkt = container_of(work, struct ipa3_tx_pkt_wrapper, work); sys = tx_pkt->sys; spin_lock_bh(&sys->spinlock); this_pkt = list_first_entry(&sys->head_desc_list, struct ipa3_tx_pkt_wrapper, link); while (tx_pkt != this_pkt) { spin_unlock_bh(&sys->spinlock); ipa3_wq_write_done_common(sys, this_pkt); spin_lock_bh(&sys->spinlock); this_pkt = list_first_entry(&sys->head_desc_list, struct ipa3_tx_pkt_wrapper, link); } spin_unlock_bh(&sys->spinlock); ipa3_wq_write_done_common(sys, tx_pkt); } static int ipa3_handle_tx_core(struct ipa3_sys_context *sys, bool process_all, bool in_poll_state) { struct sps_iovec iov; struct ipa3_tx_pkt_wrapper *tx_pkt_expected; int ret; int cnt = 0; while ((in_poll_state ? atomic_read(&sys->curr_polling_state) : !atomic_read(&sys->curr_polling_state))) { if (cnt && !process_all) break; ret = sps_get_iovec(sys->ep->ep_hdl, &iov); if (ret) { IPAERR("sps_get_iovec failed %d\n", ret); break; } if (iov.addr == 0) break; tx_pkt_expected = list_first_entry(&sys->head_desc_list, struct ipa3_tx_pkt_wrapper, link); ipa3_wq_write_done_common(sys, tx_pkt_expected); cnt++; }; return cnt; } /** * ipa3_tx_switch_to_intr_mode() - Operate the Tx data path in interrupt mode */ static void ipa3_tx_switch_to_intr_mode(struct ipa3_sys_context *sys) { int ret; if (!atomic_read(&sys->curr_polling_state)) { IPAERR("already in intr mode\n"); goto fail; } if (ipa3_ctx->transport_prototype == IPA_TRANSPORT_TYPE_GSI) { atomic_set(&sys->curr_polling_state, 0); ipa3_dec_release_wakelock(); ret = gsi_config_channel_mode(sys->ep->gsi_chan_hdl, GSI_CHAN_MODE_CALLBACK); if (ret != GSI_STATUS_SUCCESS) { IPAERR("Failed to switch to intr mode.\n"); goto fail; } } else { ret = sps_get_config(sys->ep->ep_hdl, &sys->ep->connect); if (ret) { IPAERR("sps_get_config() failed %d\n", ret); goto fail; } sys->event.options = SPS_O_EOT; ret = sps_register_event(sys->ep->ep_hdl, &sys->event); if (ret) { IPAERR("sps_register_event() failed %d\n", ret); goto fail; } sys->ep->connect.options = SPS_O_AUTO_ENABLE | SPS_O_ACK_TRANSFERS | SPS_O_EOT; ret = sps_set_config(sys->ep->ep_hdl, &sys->ep->connect); if (ret) { IPAERR("sps_set_config() failed %d\n", ret); goto fail; } atomic_set(&sys->curr_polling_state, 0); ipa3_handle_tx_core(sys, true, false); ipa3_dec_release_wakelock(); } return; fail: queue_delayed_work(sys->wq, &sys->switch_to_intr_work, msecs_to_jiffies(1)); } 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); tx_pkt = kmem_cache_zalloc(ipa3_ctx->tx_pkt_wrapper_cache, GFP_KERNEL); if (!tx_pkt) { IPAERR("failed to alloc tx wrapper\n"); queue_work(sys->wq, &sys->work); return; } INIT_LIST_HEAD(&tx_pkt->link); tx_pkt->cnt = 1; INIT_WORK(&tx_pkt->work, ipa3_wq_write_done); tx_pkt->no_unmap_dma = true; tx_pkt->sys = sys; spin_lock_bh(&sys->spinlock); list_add_tail(&tx_pkt->link, &sys->head_desc_list); spin_unlock_bh(&sys->spinlock); 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)) { IPAERR("gsi_queue_xfer for ch:%lu failed\n", sys->ep->gsi_chan_hdl); queue_work(sys->wq, &sys->work); return; } sys->len_pending_xfer = 0; } static void ipa3_handle_tx(struct ipa3_sys_context *sys) { int inactive_cycles = 0; int cnt; IPA_ACTIVE_CLIENTS_INC_SIMPLE(); do { cnt = ipa3_handle_tx_core(sys, true, true); if (cnt == 0) { inactive_cycles++; usleep_range(POLLING_MIN_SLEEP_TX, POLLING_MAX_SLEEP_TX); } else { inactive_cycles = 0; } } while (inactive_cycles <= POLLING_INACTIVITY_TX); ipa3_tx_switch_to_intr_mode(sys); IPA_ACTIVE_CLIENTS_DEC_SIMPLE(); } static void ipa3_wq_handle_tx(struct work_struct *work) { struct ipa3_sys_context *sys; sys = container_of(work, struct ipa3_sys_context, work); ipa3_handle_tx(sys); } /** * 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 system-to-bam connection. * - SPS driver expect struct sps_transfer which will contain all the data * for a transaction * - 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 transfer will be made by calling to sps_transfer() * - 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; struct ipahal_imm_cmd_pyld *tag_pyld_ret = NULL; struct ipa3_tx_pkt_wrapper *next_pkt; struct gsi_xfer_elem *gsi_xfer_elem_array = NULL; int i = 0; int j; int result; u32 mem_flag = GFP_ATOMIC; const struct ipa_gsi_ep_config *gsi_ep_cfg; 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 of client=%d\n", sys->ep->client); return -EFAULT; } if (unlikely(num_desc > gsi_ep_cfg->ipa_if_tlv)) { IPAERR("Too many chained descriptors need=%d max=%d\n", num_desc, gsi_ep_cfg->ipa_if_tlv); WARN_ON(1); return -EPERM; } gsi_xfer_elem_array = kzalloc(num_desc * sizeof(struct gsi_xfer_elem), mem_flag); if (!gsi_xfer_elem_array) { IPAERR("Failed to alloc mem for gsi xfer array.\n"); return -EFAULT; } spin_lock_bh(&sys->spinlock); for (i = 0; i < num_desc; i++) { tx_pkt = kmem_cache_zalloc(ipa3_ctx->tx_pkt_wrapper_cache, mem_flag); if (!tx_pkt) { IPAERR("failed to alloc tx wrapper\n"); goto failure; } INIT_LIST_HEAD(&tx_pkt->link); if (i == 0) { tx_pkt_first = tx_pkt; tx_pkt->cnt = num_desc; INIT_WORK(&tx_pkt->work, ipa3_wq_write_done); } /* populate tag field */ if (desc[i].opcode == ipahal_imm_cmd_get_opcode( IPA_IMM_CMD_IP_PACKET_TAG_STATUS)) { if (ipa_populate_tag_field(&desc[i], tx_pkt, &tag_pyld_ret)) { IPAERR("Failed to populate tag field\n"); 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 (dma_mapping_error(ipa3_ctx->pdev, tx_pkt->mem.phys_base)) { IPAERR("failed to do dma map.\n"); 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; list_add_tail(&tx_pkt->link, &sys->head_desc_list); gsi_xfer_elem_array[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_elem_array[i].len = desc[i].opcode; gsi_xfer_elem_array[i].type = GSI_XFER_ELEM_IMME_CMD; } else { gsi_xfer_elem_array[i].len = desc[i].len; gsi_xfer_elem_array[i].type = GSI_XFER_ELEM_DATA; } if (i == (num_desc - 1)) { if (!sys->use_comm_evt_ring) { gsi_xfer_elem_array[i].flags |= GSI_XFER_FLAG_EOT; gsi_xfer_elem_array[i].flags |= GSI_XFER_FLAG_BEI; } gsi_xfer_elem_array[i].xfer_user_data = tx_pkt_first; } else { gsi_xfer_elem_array[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_elem_array, true); if (result != GSI_STATUS_SUCCESS) { IPAERR("GSI xfer failed.\n"); goto failure; } kfree(gsi_xfer_elem_array); spin_unlock_bh(&sys->spinlock); /* set the timer for sending the NOP descriptor */ if (sys->use_comm_evt_ring && !hrtimer_active(&sys->db_timer)) { 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); } 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; } kfree(gsi_xfer_elem_array); spin_unlock_bh(&sys->spinlock); return -EFAULT; } /** * 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 SPS/GSI 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 (!desc) { IPAERR("desc is NULL\n"); WARN_ON(1); 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 SPS/GSI 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) { IPAERR("no mem\n"); 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; IPA_ACTIVE_CLIENTS_INC_SIMPLE(); 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"); if (atomic_dec_return(&comp->cnt) == 0) kfree(comp); bail: IPA_ACTIVE_CLIENTS_DEC_SIMPLE(); return result; } /** * ipa3_sps_irq_tx_notify() - Callback function which will be called by * the SPS driver to start a Tx poll operation. * Called in an interrupt context. * @notify: SPS driver supplied notification struct * * This function defer the work for this event to the tx workqueue. */ static void ipa3_sps_irq_tx_notify(struct sps_event_notify *notify) { struct ipa3_sys_context *sys = (struct ipa3_sys_context *)notify->user; int ret; IPADBG_LOW("event %d notified\n", notify->event_id); switch (notify->event_id) { case SPS_EVENT_EOT: if (IPA_CLIENT_IS_APPS_CONS(sys->ep->client)) atomic_set(&ipa3_ctx->transport_pm.eot_activity, 1); if (!atomic_read(&sys->curr_polling_state)) { ret = sps_get_config(sys->ep->ep_hdl, &sys->ep->connect); if (ret) { IPAERR("sps_get_config() failed %d\n", ret); break; } sys->ep->connect.options = SPS_O_AUTO_ENABLE | SPS_O_ACK_TRANSFERS | SPS_O_POLL; ret = sps_set_config(sys->ep->ep_hdl, &sys->ep->connect); if (ret) { IPAERR("sps_set_config() failed %d\n", ret); break; } 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->event_id); } } /** * ipa3_sps_irq_tx_no_aggr_notify() - Callback function which will be called by * the SPS driver after a Tx operation is complete. * Called in an interrupt context. * @notify: SPS driver supplied notification struct * * This function defer the work for this event to the tx workqueue. * This event will be later handled by ipa_write_done. */ static void ipa3_sps_irq_tx_no_aggr_notify(struct sps_event_notify *notify) { struct ipa3_tx_pkt_wrapper *tx_pkt; IPADBG_LOW("event %d notified\n", notify->event_id); switch (notify->event_id) { case SPS_EVENT_EOT: tx_pkt = notify->data.transfer.user; if (IPA_CLIENT_IS_APPS_CONS(tx_pkt->sys->ep->client)) atomic_set(&ipa3_ctx->transport_pm.eot_activity, 1); queue_work(tx_pkt->sys->wq, &tx_pkt->work); break; default: IPAERR("received unexpected event id %d\n", notify->event_id); } } /** * 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 cnt; if (ipa3_ctx->transport_prototype == IPA_TRANSPORT_TYPE_GSI) cnt = ipa_handle_rx_core_gsi(sys, process_all, in_poll_state); else cnt = ipa_handle_rx_core_sps(sys, process_all, in_poll_state); return cnt; } /** * ipa3_rx_switch_to_intr_mode() - Operate the Rx data path in interrupt mode */ static void ipa3_rx_switch_to_intr_mode(struct ipa3_sys_context *sys) { int ret; if (ipa3_ctx->transport_prototype == IPA_TRANSPORT_TYPE_GSI) { if (!atomic_read(&sys->curr_polling_state)) { IPAERR("already in intr mode\n"); goto fail; } atomic_set(&sys->curr_polling_state, 0); ipa3_dec_release_wakelock(); ret = gsi_config_channel_mode(sys->ep->gsi_chan_hdl, GSI_CHAN_MODE_CALLBACK); if (ret != GSI_STATUS_SUCCESS) { IPAERR("Failed to switch to intr mode.\n"); goto fail; } } else { ret = sps_get_config(sys->ep->ep_hdl, &sys->ep->connect); if (ret) { IPAERR("sps_get_config() failed %d\n", ret); goto fail; } if (!atomic_read(&sys->curr_polling_state) && ((sys->ep->connect.options & SPS_O_EOT) == SPS_O_EOT)) { IPADBG("already in intr mode\n"); return; } if (!atomic_read(&sys->curr_polling_state)) { IPAERR("already in intr mode\n"); goto fail; } sys->event.options = SPS_O_EOT; ret = sps_register_event(sys->ep->ep_hdl, &sys->event); if (ret) { IPAERR("sps_register_event() failed %d\n", ret); goto fail; } sys->ep->connect.options = SPS_O_AUTO_ENABLE | SPS_O_ACK_TRANSFERS | SPS_O_EOT; ret = sps_set_config(sys->ep->ep_hdl, &sys->ep->connect); if (ret) { IPAERR("sps_set_config() failed %d\n", ret); goto fail; } atomic_set(&sys->curr_polling_state, 0); ipa3_handle_rx_core(sys, true, false); ipa3_dec_release_wakelock(); } return; fail: queue_delayed_work(sys->wq, &sys->switch_to_intr_work, msecs_to_jiffies(1)); } /** * ipa_rx_notify() - Callback function which is called by the SPS driver when a * a packet is received * @notify: SPS driver supplied notification information * * Called in an interrupt context, therefore the majority of the work is * deffered using a work queue. * * After receiving a packet, the driver goes to polling mode and keeps pulling * packets until the rx buffer is empty, then it goes back to interrupt mode. * This comes to prevent the CPU from handling too many interrupts when the * throughput is high. */ static void ipa3_sps_irq_rx_notify(struct sps_event_notify *notify) { struct ipa3_sys_context *sys = (struct ipa3_sys_context *)notify->user; int ret; IPADBG_LOW("event %d notified\n", notify->event_id); switch (notify->event_id) { case SPS_EVENT_EOT: if (IPA_CLIENT_IS_APPS_CONS(sys->ep->client)) atomic_set(&ipa3_ctx->transport_pm.eot_activity, 1); if (!atomic_read(&sys->curr_polling_state)) { ret = sps_get_config(sys->ep->ep_hdl, &sys->ep->connect); if (ret) { IPAERR("sps_get_config() failed %d\n", ret); break; } sys->ep->connect.options = SPS_O_AUTO_ENABLE | SPS_O_ACK_TRANSFERS | SPS_O_POLL; ret = sps_set_config(sys->ep->ep_hdl, &sys->ep->connect); if (ret) { IPAERR("sps_set_config() failed %d\n", ret); break; } ipa3_inc_acquire_wakelock(); atomic_set(&sys->curr_polling_state, 1); trace_intr_to_poll3(sys->ep->client); queue_work(sys->wq, &sys->work); } break; default: IPAERR("received unexpected event id %d\n", notify->event_id); } } /** * switch_to_intr_tx_work_func() - Wrapper function to move from polling * to interrupt mode * @work: work struct */ void ipa3_switch_to_intr_tx_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); ipa3_handle_tx(sys); } /** * 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 = 0; int cnt; IPA_ACTIVE_CLIENTS_INC_SIMPLE(); 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 - sys->len_pending_xfer == 0) break; } while (inactive_cycles <= POLLING_INACTIVITY_RX); trace_poll_to_intr3(sys->ep->client); ipa3_rx_switch_to_intr_mode(sys); IPA_ACTIVE_CLIENTS_DEC_SIMPLE(); } 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); 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; } /** * ipa3_setup_sys_pipe() - Setup an IPA end-point in system-BAM mode and perform * IPA EP configuration * @sys_in: [in] input needed to setup BAM pipe and configure EP * @clnt_hdl: [out] client handle * * - configure the end-point registers with the supplied * parameters from the user. * - call SPS APIs to create a system-to-bam connection with IPA. * - allocate descriptor FIFO * - register callback function(ipa3_sps_irq_rx_notify or * ipa3_sps_irq_tx_notify - depends on client type) in case the driver is * not configured to pulling mode * * 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 ipa_ep_idx; int result = -EINVAL; dma_addr_t dma_addr; char buff[IPA_RESOURCE_NAME_MAX]; struct iommu_domain *smmu_domain; 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 == -1) { 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; } IPA_ACTIVE_CLIENTS_INC_EP(sys_in->client); memset(ep, 0, offsetof(struct ipa3_ep_context, sys)); if (!ep->sys) { 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, 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, 1); if (!ep->sys->repl_wq) { IPAERR("failed to create rep wq for client %d\n", sys_in->client); result = -EFAULT; goto fail_wq2; } 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; } else { memset(ep->sys, 0, offsetof(struct ipa3_sys_context, ep)); } 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->priv = sys_in->priv; ep->keep_ipa_awake = sys_in->keep_ipa_awake; atomic_set(&ep->avail_fifo_desc, ((sys_in->desc_fifo_sz/sizeof(struct sps_iovec))-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) { IPAERR("no memory\n"); 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); } if (ipa3_ctx->transport_prototype == IPA_TRANSPORT_TYPE_GSI) { result = ipa_gsi_setup_channel(sys_in, ep); if (result) { IPAERR("Failed to setup GSI channel\n"); goto fail_gen2; } } else { /* Default Config */ ep->ep_hdl = sps_alloc_endpoint(); if (ep->ep_hdl == NULL) { IPAERR("SPS EP allocation failed.\n"); goto fail_gen2; } result = sps_get_config(ep->ep_hdl, &ep->connect); if (result) { IPAERR("fail to get config.\n"); goto fail_sps_cfg; } /* Specific Config */ if (IPA_CLIENT_IS_CONS(sys_in->client)) { ep->connect.mode = SPS_MODE_SRC; ep->connect.destination = SPS_DEV_HANDLE_MEM; ep->connect.source = ipa3_ctx->bam_handle; ep->connect.dest_pipe_index = ipa3_ctx->a5_pipe_index++; ep->connect.src_pipe_index = ipa_ep_idx; } else { ep->connect.mode = SPS_MODE_DEST; ep->connect.source = SPS_DEV_HANDLE_MEM; ep->connect.destination = ipa3_ctx->bam_handle; ep->connect.src_pipe_index = ipa3_ctx->a5_pipe_index++; ep->connect.dest_pipe_index = ipa_ep_idx; } IPADBG("client:%d ep:%d", sys_in->client, ipa_ep_idx); IPADBG("dest_pipe_index:%d src_pipe_index:%d\n", ep->connect.dest_pipe_index, ep->connect.src_pipe_index); ep->connect.options = ep->sys->sps_option; ep->connect.desc.size = sys_in->desc_fifo_sz; ep->connect.desc.base = dma_alloc_coherent(ipa3_ctx->pdev, ep->connect.desc.size, &dma_addr, 0); if (ipa3_ctx->smmu_s1_bypass) { ep->connect.desc.phys_base = dma_addr; } else { ep->connect.desc.iova = dma_addr; smmu_domain = ipa3_get_smmu_domain(); if (smmu_domain != NULL) { ep->connect.desc.phys_base = iommu_iova_to_phys(smmu_domain, dma_addr); } } if (ep->connect.desc.base == NULL) { IPAERR("fail to get DMA desc memory.\n"); goto fail_sps_cfg; } ep->connect.event_thresh = IPA_EVENT_THRESHOLD; result = ipa3_sps_connect_safe(ep->ep_hdl, &ep->connect, sys_in->client); if (result) { IPAERR("sps_connect fails.\n"); goto fail_sps_connect; } ep->sys->event.options = SPS_O_EOT; ep->sys->event.mode = SPS_TRIGGER_CALLBACK; ep->sys->event.xfer_done = NULL; ep->sys->event.user = ep->sys; ep->sys->event.callback = ep->sys->sps_callback; result = sps_register_event(ep->ep_hdl, &ep->sys->event); if (result < 0) { IPAERR("register event error %d\n", result); goto fail_register_event; } } /* end of sps config */ *clnt_hdl = ipa_ep_idx; if (ep->sys->repl_hdlr == ipa3_fast_replenish_rx_cache) { ep->sys->repl.capacity = ep->sys->rx_pool_sz + 1; ep->sys->repl.cache = kzalloc(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 (IPA_CLIENT_IS_CONS(sys_in->client)) ipa3_replenish_rx_cache(ep->sys); 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_gen2; } if (!ep->keep_ipa_awake) IPA_ACTIVE_CLIENTS_DEC_EP(sys_in->client); IPADBG("client %d (ep: %d) connected sys=%p\n", sys_in->client, ipa_ep_idx, ep->sys); return 0; fail_register_event: sps_disconnect(ep->ep_hdl); fail_sps_connect: dma_free_coherent(ipa3_ctx->pdev, ep->connect.desc.size, ep->connect.desc.base, ep->connect.desc.phys_base); fail_sps_cfg: sps_free_endpoint(ep->ep_hdl); fail_gen2: 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 system-BAM 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); empty = list_empty(&ep->sys->head_desc_list); spin_unlock_bh(&ep->sys->spinlock); if (!empty) usleep_range(95, 105); else break; } while (1); } if (IPA_CLIENT_IS_CONS(ep->client)) cancel_delayed_work_sync(&ep->sys->replenish_rx_work); flush_workqueue(ep->sys->wq); if (ipa3_ctx->transport_prototype == IPA_TRANSPORT_TYPE_GSI) { /* 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); BUG(); return result; } result = ipa3_reset_gsi_channel(clnt_hdl); if (result != GSI_STATUS_SUCCESS) { IPAERR("Failed to reset chan: %d.\n", result); BUG(); 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); BUG(); 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 (result != GSI_STATUS_SUCCESS) { IPAERR("Failed to reset evt ring: %d.\n", result); BUG(); 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 (result != GSI_STATUS_SUCCESS) { IPAERR("Failed to dealloc evt ring: %d.\n", result); BUG(); return result; } } } else { sps_disconnect(ep->ep_hdl); dma_free_coherent(ipa3_ctx->pdev, ep->connect.desc.size, ep->connect.desc.base, ep->connect.desc.phys_base); sps_free_endpoint(ep->ep_hdl); } if (ep->sys->repl_wq) flush_workqueue(ep->sys->repl_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_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. * This function is supplied in ipa3_connect. */ 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=%p 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 SPS point-of-view the IPA driver will * get notified by the supplied callback - ipa_sps_irq_tx_comp() * * ipa_sps_irq_tx_comp will call to the user supplied * callback (from ipa3_connect) * * 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; int data_idx; const struct ipa_gsi_ep_config *gsi_ep; if (unlikely(!ipa3_ctx)) { IPAERR("IPA3 driver was not initialized\n"); return -EINVAL; } if (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 (-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 (-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 (!sys->ep->valid) { IPAERR("pipe not valid\n"); goto fail_gen; } 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 (gsi_ep && (num_frags + 3 > gsi_ep->ipa_if_tlv)) { if (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 (!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) { /* 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].opcode = ipahal_imm_cmd_get_opcode( IPA_IMM_CMD_IP_PACKET_TAG_STATUS); desc[data_idx].type = IPA_IMM_CMD_DESC; desc[data_idx].callback = ipa3_tag_destroy_imm; data_idx++; } desc[data_idx].opcode = ipahal_imm_cmd_get_opcode(IPA_IMM_CMD_IP_PACKET_INIT); 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; } data_idx++; for (f = 0; f < num_frags; f++) { desc[data_idx + f].frag = &skb_shinfo(skb)->frags[f]; desc[data_idx + f].type = IPA_DATA_DESC_SKB_PAGED; desc[data_idx + f].len = skb_frag_size(desc[data_idx + f].frag); } /* don't free skb till frag mappings are released */ if (num_frags) { desc[data_idx + f - 1].callback = desc[2].callback; desc[data_idx + f - 1].user1 = desc[2].user1; desc[data_idx + f - 1].user2 = desc[2].user2; desc[data_idx - 1].callback = NULL; } if (ipa3_send(sys, num_frags + data_idx, desc, true)) { IPAERR("fail to send skb %p 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].opcode = ipahal_imm_cmd_get_opcode( IPA_IMM_CMD_IP_PACKET_TAG_STATUS); desc[data_idx].type = IPA_IMM_CMD_DESC; desc[data_idx].callback = ipa3_tag_destroy_imm; 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 (ipa3_send(sys, data_idx + 1, desc, true)) { IPAERR("fail to send skb %p 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 (ipa3_send(sys, num_frags + data_idx + 1, desc, true)) { IPAERR("fail to send skb %p num_frags %u HWP\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; } static void ipa3_wq_handle_rx(struct work_struct *work) { struct ipa3_sys_context *sys; sys = container_of(work, struct ipa3_sys_context, work); 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); curr = atomic_read(&sys->repl.tail_idx); begin: while (1) { next = (curr + 1) % sys->repl.capacity; if (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 (!rx_pkt) { pr_err_ratelimited("%s fail alloc rx wrapper sys=%p\n", __func__, sys); goto fail_kmem_cache_alloc; } INIT_LIST_HEAD(&rx_pkt->link); 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) { pr_err_ratelimited("%s fail alloc skb sys=%p\n", __func__, sys); 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)) { pr_err_ratelimited("%s dma map fail %p for %p sys=%p\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) 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); else WARN_ON(1); pr_err_ratelimited("%s sys=%p repl ring empty\n", __func__, sys); goto begin; } } 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--; INIT_LIST_HEAD(&rx_pkt->link); rx_pkt->len = 0; rx_pkt->sys = sys; list_add_tail(&rx_pkt->link, &sys->head_desc_list); if (ipa3_ctx->transport_prototype == IPA_TRANSPORT_TYPE_GSI) { 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); } else { ret = sps_transfer_one(sys->ep->ep_hdl, rx_pkt->data.dma_addr, IPA_WLAN_RX_BUFF_SZ, rx_pkt, 0); } if (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_COMM_RX_POOL_LOW, 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) { IPAERR("failed to alloc rx wrapper\n"); 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 %p for %p\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 * - Initiate a SPS transfer so that SPS driver will use this packet later. */ static void ipa3_replenish_rx_cache(struct ipa3_sys_context *sys) { void *ptr; struct ipa3_rx_pkt_wrapper *rx_pkt; int ret; int rx_len_cached = 0; struct gsi_xfer_elem gsi_xfer_elem_one; gfp_t flag = GFP_NOWAIT | __GFP_NOWARN; rx_len_cached = sys->len; while (rx_len_cached < sys->rx_pool_sz) { rx_pkt = kmem_cache_zalloc(ipa3_ctx->rx_pkt_wrapper_cache, flag); if (!rx_pkt) { IPAERR("failed to alloc rx wrapper\n"); goto fail_kmem_cache_alloc; } INIT_LIST_HEAD(&rx_pkt->link); 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 %p for %p\n", (void *)rx_pkt->data.dma_addr, ptr); goto fail_dma_mapping; } list_add_tail(&rx_pkt->link, &sys->head_desc_list); rx_len_cached = ++sys->len; if (ipa3_ctx->transport_prototype == IPA_TRANSPORT_TYPE_GSI) { 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 = sys->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, false); if (ret != GSI_STATUS_SUCCESS) { IPAERR("failed to provide buffer: %d\n", ret); goto fail_provide_rx_buffer; } /* * As doorbell is a costly operation, notify to GSI * of new buffers if threshold is exceeded */ if (++sys->len_pending_xfer >= IPA_REPL_XFER_THRESH) { sys->len_pending_xfer = 0; gsi_start_xfer(sys->ep->gsi_chan_hdl); } } else { ret = sps_transfer_one(sys->ep->ep_hdl, rx_pkt->data.dma_addr, sys->rx_buff_sz, rx_pkt, 0); if (ret) { IPAERR("sps_transfer_one failed %d\n", ret); goto fail_provide_rx_buffer; } } } return; fail_provide_rx_buffer: list_del(&rx_pkt->link); rx_len_cached = --sys->len; dma_unmap_single(ipa3_ctx->pdev, rx_pkt->data.dma_addr, sys->rx_buff_sz, DMA_FROM_DEVICE); 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 - sys->len_pending_xfer == 0) queue_delayed_work(sys->wq, &sys->replenish_rx_work, msecs_to_jiffies(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 rx_len_cached = 0; struct gsi_xfer_elem gsi_xfer_elem_one; gfp_t flag = GFP_NOWAIT | __GFP_NOWARN; 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) { IPAERR("failed to alloc rx wrapper\n"); goto fail_kmem_cache_alloc; } INIT_LIST_HEAD(&rx_pkt->link); 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 %p for %p\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(&rx_pkt->link); spin_unlock_bh(&sys->spinlock); INIT_LIST_HEAD(&rx_pkt->link); 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 %p for %p\n", (void *)rx_pkt->data.dma_addr, ptr); goto fail_dma_mapping; } } list_add_tail(&rx_pkt->link, &sys->head_desc_list); rx_len_cached = ++sys->len; if (ipa3_ctx->transport_prototype == IPA_TRANSPORT_TYPE_GSI) { 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 = sys->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, false); if (ret != GSI_STATUS_SUCCESS) { IPAERR("failed to provide buffer: %d\n", ret); goto fail_provide_rx_buffer; } /* * As doorbell is a costly operation, notify to GSI * of new buffers if threshold is exceeded */ if (++sys->len_pending_xfer >= IPA_REPL_XFER_THRESH) { sys->len_pending_xfer = 0; gsi_start_xfer(sys->ep->gsi_chan_hdl); } } else { ret = sps_transfer_one(sys->ep->ep_hdl, rx_pkt->data.dma_addr, sys->rx_buff_sz, rx_pkt, 0); if (ret) { IPAERR("sps_transfer_one failed %d\n", ret); goto fail_provide_rx_buffer; } } } return; fail_provide_rx_buffer: rx_len_cached = --sys->len; list_del(&rx_pkt->link); INIT_LIST_HEAD(&rx_pkt->link); dma_unmap_single(ipa3_ctx->pdev, rx_pkt->data.dma_addr, sys->rx_buff_sz, DMA_FROM_DEVICE); fail_dma_mapping: spin_lock_bh(&sys->spinlock); list_add_tail(&rx_pkt->link, &sys->rcycl_list); INIT_LIST_HEAD(&rx_pkt->link); spin_unlock_bh(&sys->spinlock); fail_kmem_cache_alloc: if (rx_len_cached - sys->len_pending_xfer == 0) queue_delayed_work(sys->wq, &sys->replenish_rx_work, msecs_to_jiffies(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_one; u32 curr; 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]; list_add_tail(&rx_pkt->link, &sys->head_desc_list); if (ipa3_ctx->transport_prototype == IPA_TRANSPORT_TYPE_GSI) { 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 = sys->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, false); if (ret != GSI_STATUS_SUCCESS) { IPAERR("failed to provide buffer: %d\n", ret); break; } /* * As doorbell is a costly operation, notify to GSI * of new buffers if threshold is exceeded */ if (++sys->len_pending_xfer >= IPA_REPL_XFER_THRESH) { sys->len_pending_xfer = 0; gsi_start_xfer(sys->ep->gsi_chan_hdl); } } else { ret = sps_transfer_one(sys->ep->ep_hdl, rx_pkt->data.dma_addr, sys->rx_buff_sz, rx_pkt, 0); if (ret) { IPAERR("sps_transfer_one failed %d\n", ret); list_del(&rx_pkt->link); break; } } rx_len_cached = ++sys->len; curr = (curr + 1) % sys->repl.capacity; /* ensure write is done before setting head index */ mb(); atomic_set(&sys->repl.head_idx, curr); } queue_work(sys->repl_wq, &sys->repl_work); if (rx_len_cached - sys->len_pending_xfer <= IPA_DEFAULT_SYS_YELLOW_WM) { if (sys->ep->client == IPA_CLIENT_APPS_WAN_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(); } /** * 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; list_for_each_entry_safe(rx_pkt, r, &sys->head_desc_list, link) { 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_skb(rx_pkt->data.skb); kmem_cache_free(ipa3_ctx->rx_pkt_wrapper_cache, rx_pkt); } list_for_each_entry_safe(rx_pkt, r, &sys->rcycl_list, link) { 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_skb(rx_pkt->data.skb); kmem_cache_free(ipa3_ctx->rx_pkt_wrapper_cache, rx_pkt); } if (sys->repl.cache) { head = atomic_read(&sys->repl.head_idx); tail = atomic_read(&sys->repl.tail_idx); while (head != tail) { rx_pkt = sys->repl.cache[head]; 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); head = (head + 1) % sys->repl.capacity; } kfree(sys->repl.cache); } } static struct sk_buff *ipa3_skb_copy_for_client(struct sk_buff *skb, int len) { struct sk_buff *skb2 = NULL; skb2 = __dev_alloc_skb(len + IPA_RX_BUFF_CLIENT_HEADROOM, GFP_KERNEL); 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\n"); return rc; } 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) { skb2 = skb_copy_expand(sys->prev_skb, 0, sys->len_rem, GFP_KERNEL); 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) { skb2 = skb_copy_expand(sys->prev_skb, 0, skb->len, GFP_KERNEL); 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; return rc; } } 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"); sys->prev_skb = skb_copy(skb, GFP_KERNEL); sys->len_partial = skb->len; return rc; } 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; } 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_SUSPENDED_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_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("status fields invalid\n"); IPAERR("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); BUG(); } 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"); return rc; } memcpy(&comp, skb->data, sizeof(comp)); skb_pull(skb, sizeof(comp) + IPA_SIZE_DL_CSUM_META_TRAILER); 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 = %p\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 && status.rt_rule_id == IPA_RULE_ID_INVALID) 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"); sys->prev_skb = skb_copy(skb, GFP_KERNEL); sys->len_partial = skb->len; return rc; } pad_len_byte = ((status.pkt_len + 3) & ~3) - status.pkt_len; len = status.pkt_len + pad_len_byte + IPA_SIZE_DL_CSUM_META_TRAILER; 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); BUG(); } 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]); } }; 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) { int rc = 0; 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 rc; } /* * 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 || status.pkt_len > IPA_GENERIC_AGGR_BYTE_LIMIT * 1024) { 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 rc; } 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 status; struct ipa3_ep_context *ep; unsigned int src_pipe; u32 metadata; u8 ucp; ipahal_pkt_status_parse(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 || !ep->valid || !ep->client_notify)) { IPAERR("drop pipe=%d ep_valid=%d client_notify=%p\n", src_pipe, ep->valid, ep->client_notify); 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)); ep->client_notify(ep->priv, IPA_RECEIVE, (unsigned long)(rx_skb)); } static void ipa3_recycle_rx_wrapper(struct ipa3_rx_pkt_wrapper *rx_pkt) { rx_pkt->data.dma_addr = 0; ipa3_skb_recycle(rx_pkt->data.skb); 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_wq_rx_common(struct ipa3_sys_context *sys, u32 size) { struct ipa3_rx_pkt_wrapper *rx_pkt_expected; struct sk_buff *rx_skb; if (unlikely(list_empty(&sys->head_desc_list))) { WARN_ON(1); return; } spin_lock_bh(&sys->spinlock); rx_pkt_expected = list_first_entry(&sys->head_desc_list, struct ipa3_rx_pkt_wrapper, link); list_del(&rx_pkt_expected->link); sys->len--; if (size) rx_pkt_expected->len = size; spin_unlock_bh(&sys->spinlock); rx_skb = rx_pkt_expected->data.skb; dma_unmap_single(ipa3_ctx->pdev, rx_pkt_expected->data.dma_addr, sys->rx_buff_sz, DMA_FROM_DEVICE); skb_set_tail_pointer(rx_skb, rx_pkt_expected->len); rx_skb->len = rx_pkt_expected->len; *(unsigned int *)rx_skb->cb = rx_skb->len; rx_skb->truesize = rx_pkt_expected->len + sizeof(struct sk_buff); sys->pyld_hdlr(rx_skb, sys); sys->free_rx_wrapper(rx_pkt_expected); sys->repl_hdlr(sys); } static void ipa3_wlan_wq_rx_common(struct ipa3_sys_context *sys, u32 size) { struct ipa3_rx_pkt_wrapper *rx_pkt_expected; struct sk_buff *rx_skb; if (unlikely(list_empty(&sys->head_desc_list))) { WARN_ON(1); return; } rx_pkt_expected = list_first_entry(&sys->head_desc_list, struct ipa3_rx_pkt_wrapper, link); list_del(&rx_pkt_expected->link); sys->len--; if (size) rx_pkt_expected->len = size; 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, struct ipa_mem_buffer *mem_info) { 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, (unsigned long)(mem_info)); 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); if (unlikely(rx_pkt == NULL)) WARN_ON(1); sys = rx_pkt->sys; ipa3_wq_rx_common(sys, 0); } /** * ipa3_sps_irq_rx_no_aggr_notify() - Callback function which will be called by * the SPS driver after a Rx operation is complete. * Called in an interrupt context. * @notify: SPS driver supplied notification struct * * This function defer the work for this event to a workqueue. */ void ipa3_sps_irq_rx_no_aggr_notify(struct sps_event_notify *notify) { struct ipa3_rx_pkt_wrapper *rx_pkt; switch (notify->event_id) { case SPS_EVENT_EOT: rx_pkt = notify->data.transfer.user; if (IPA_CLIENT_IS_APPS_CONS(rx_pkt->sys->ep->client)) atomic_set(&ipa3_ctx->transport_pm.eot_activity, 1); rx_pkt->len = notify->data.transfer.iovec.size; IPADBG_LOW("event %d notified sys=%p len=%u\n", notify->event_id, notify->user, rx_pkt->len); queue_work(rx_pkt->sys->wq, &rx_pkt->work); break; default: IPAERR("received unexpected event id %d sys=%p\n", notify->event_id, notify->user); } } 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_ON(1); } 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 int ipa3_assign_policy(struct ipa_sys_connect_params *in, struct ipa3_sys_context *sys) { if (in->client == IPA_CLIENT_APPS_CMD_PROD) { sys->policy = IPA_POLICY_INTR_MODE; sys->use_comm_evt_ring = false; sys->sps_option = (SPS_O_AUTO_ENABLE | SPS_O_EOT); sys->sps_callback = ipa3_sps_irq_tx_no_aggr_notify; return 0; } if (IPA_CLIENT_IS_MEMCPY_DMA_PROD(in->client)) { sys->policy = IPA_POLICY_NOINTR_MODE; sys->sps_option = SPS_O_AUTO_ENABLE; sys->sps_callback = NULL; return 0; } 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; sys->sps_option = (SPS_O_AUTO_ENABLE| SPS_O_EOT | SPS_O_ACK_TRANSFERS); sys->sps_callback = ipa3_sps_irq_tx_notify; INIT_WORK(&sys->work, ipa3_wq_handle_tx); INIT_DELAYED_WORK(&sys->switch_to_intr_work, ipa3_switch_to_intr_tx_work_func); 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); sys->sps_option = SPS_O_AUTO_ENABLE; sys->sps_callback = ipa3_sps_irq_tx_no_aggr_notify; } } else { if (in->client == IPA_CLIENT_APPS_LAN_CONS || in->client == IPA_CLIENT_APPS_WAN_CONS) { sys->ep->status.status_en = true; sys->policy = IPA_POLICY_INTR_POLL_MODE; sys->sps_option = (SPS_O_AUTO_ENABLE | SPS_O_EOT | SPS_O_ACK_TRANSFERS); sys->sps_callback = ipa3_sps_irq_rx_notify; 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); INIT_WORK(&sys->repl_work, ipa3_wq_repl_rx); 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; 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) { 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) { sys->pyld_hdlr = ipa3_wan_rx_pyld_hdlr; sys->free_rx_wrapper = ipa3_free_rx_wrapper; if (nr_cpu_ids > 1) sys->repl_hdlr = ipa3_fast_replenish_rx_cache; else sys->repl_hdlr = ipa3_replenish_rx_cache; sys->rx_pool_sz = ipa3_ctx->wan_rx_ring_size; in->ipa_ep_cfg.aggr.aggr_sw_eof_active = true; if (ipa3_ctx-> ipa_client_apps_wan_cons_agg_gro) { IPAERR("get close-by %u\n", ipa_adjust_ra_buff_base_sz( in->ipa_ep_cfg.aggr. aggr_byte_limit)); IPAERR("set rx_buff_sz %lu\n", (unsigned long int) IPA_GENERIC_RX_BUFF_SZ( ipa_adjust_ra_buff_base_sz( in->ipa_ep_cfg. aggr.aggr_byte_limit))); /* disable ipa_status */ sys->ep->status. status_en = false; sys->rx_buff_sz = IPA_GENERIC_RX_BUFF_SZ( ipa_adjust_ra_buff_base_sz( in->ipa_ep_cfg.aggr. aggr_byte_limit)); in->ipa_ep_cfg.aggr. aggr_byte_limit = sys->rx_buff_sz < in-> ipa_ep_cfg.aggr. aggr_byte_limit ? IPA_ADJUST_AGGR_BYTE_LIMIT( sys->rx_buff_sz) : IPA_ADJUST_AGGR_BYTE_LIMIT( in->ipa_ep_cfg. aggr.aggr_byte_limit); IPAERR("set aggr_limit %lu\n", (unsigned long int) in->ipa_ep_cfg.aggr. aggr_byte_limit); } 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; sys->sps_option = (SPS_O_AUTO_ENABLE | SPS_O_EOT | SPS_O_ACK_TRANSFERS); sys->sps_callback = ipa3_sps_irq_rx_notify; 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/ sizeof(struct sps_iovec) - 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; sys->sps_option = (SPS_O_AUTO_ENABLE | SPS_O_EOT | SPS_O_ACK_TRANSFERS); sys->sps_callback = ipa3_sps_irq_rx_notify; 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_ODU_RX_BUFF_SZ; sys->rx_pool_sz = in->desc_fifo_sz / sizeof(struct sps_iovec) - 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; sys->free_rx_wrapper = ipa3_free_rx_wrapper; sys->repl_hdlr = ipa3_replenish_rx_cache; } 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; sys->sps_option = (SPS_O_AUTO_ENABLE | SPS_O_EOT | SPS_O_ACK_TRANSFERS); sys->sps_callback = ipa3_sps_irq_rx_notify; 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; sys->sps_option = SPS_O_AUTO_ENABLE | SPS_O_ACK_TRANSFERS | SPS_O_POLL; } else { IPAERR("Need to install a RX pipe hdlr\n"); WARN_ON(1); 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:%p\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:%p\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) using sps_transfer_one. Will set EOT flag for last * descriptor Once this send was done from SPS point-of-view the * IPA driver will get notified by the supplied callback - * ipa3_sps_irq_tx_no_aggr_notify() * * ipa3_sps_irq_tx_no_aggr_notify will call to the user supplied * callback (from ipa3_connect) * * 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:%p\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].opcode = ipahal_imm_cmd_get_opcode( IPA_IMM_CMD_IP_PACKET_TAG_STATUS); desc[0].type = IPA_IMM_CMD_DESC; desc[0].callback = ipa3_tag_destroy_imm; 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:%p pyld_buf:0x%p 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:%p\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_one()\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_bam_or_gsi_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_bam_or_gsi_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_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=%p\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; if (ipa3_ctx->transport_prototype == IPA_TRANSPORT_TYPE_GSI) *ipa_bam_or_gsi_hdl = ipa3_ctx->gsi_dev_hdl; else *ipa_bam_or_gsi_hdl = ipa3_ctx->bam_handle; 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=%p\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; queue_work(tx_pkt->sys->wq, &tx_pkt->work); break; default: IPAERR("received unexpected event id %d\n", notify->evt_id); } } static void ipa_gsi_irq_rx_notify_cb(struct gsi_chan_xfer_notify *notify) { struct ipa3_sys_context *sys; struct ipa3_rx_pkt_wrapper *rx_pkt_expected, *rx_pkt_rcvd; if (!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; rx_pkt_expected = list_first_entry(&sys->head_desc_list, struct ipa3_rx_pkt_wrapper, link); rx_pkt_rcvd = (struct ipa3_rx_pkt_wrapper *)notify->xfer_user_data; if (rx_pkt_expected != rx_pkt_rcvd) { IPAERR("Pkt was not filled in head of rx buffer.\n"); WARN_ON(1); return; } sys->ep->bytes_xfered_valid = true; sys->ep->bytes_xfered = notify->bytes_xfered; sys->ep->phys_base = rx_pkt_rcvd->data.dma_addr; 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); 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); } } static void ipa_dma_gsi_irq_rx_notify_cb(struct gsi_chan_xfer_notify *notify) { struct ipa3_sys_context *sys; struct ipa3_dma_xfer_wrapper *rx_pkt_expected, *rx_pkt_rcvd; if (!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; } rx_pkt_expected = list_first_entry(&sys->head_desc_list, struct ipa3_dma_xfer_wrapper, link); rx_pkt_rcvd = (struct ipa3_dma_xfer_wrapper *)notify ->xfer_user_data; if (rx_pkt_expected != rx_pkt_rcvd) { IPAERR("Pkt was not filled in head of rx buffer.\n"); WARN_ON(1); return; } sys->ep->bytes_xfered_valid = true; sys->ep->bytes_xfered = notify->bytes_xfered; sys->ep->phys_base = rx_pkt_rcvd->phys_addr_dest; 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) { struct gsi_evt_ring_props gsi_evt_ring_props; struct gsi_chan_props gsi_channel_props; union __packed gsi_channel_scratch ch_scratch; const struct ipa_gsi_ep_config *gsi_ep_info; dma_addr_t dma_addr; dma_addr_t evt_dma_addr; int result; if (!ep) { IPAERR("EP context is empty\n"); return -EINVAL; } evt_dma_addr = 0; ep->gsi_evt_ring_hdl = ~0; memset(&gsi_evt_ring_props, 0, sizeof(gsi_evt_ring_props)); if (ep->sys->use_comm_evt_ring) { if (ipa3_ctx->gsi_evt_comm_ring_rem < 2 * in->desc_fifo_sz) { IPAERR("not enough space in common event ring\n"); IPAERR("available: %d needed: %d\n", ipa3_ctx->gsi_evt_comm_ring_rem, 2 * in->desc_fifo_sz); WARN_ON(1); return -EFAULT; } ipa3_ctx->gsi_evt_comm_ring_rem -= (2 * in->desc_fifo_sz); ep->gsi_evt_ring_hdl = ipa3_ctx->gsi_evt_comm_hdl; } else if (ep->sys->policy != IPA_POLICY_NOINTR_MODE || IPA_CLIENT_IS_CONS(ep->client)) { 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 = 2 * in->desc_fifo_sz; 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; /* 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; 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; } memset(&gsi_channel_props, 0, sizeof(gsi_channel_props)); 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 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. For PROD pipes there is also an additional descriptor * for TAG STATUS immediate command. APPS_WAN_PROD pipe is an exception * as this pipe do not use TAG STATUS for completion. Instead it uses * event ring based completions. */ if (ep->client == IPA_CLIENT_APPS_WAN_PROD) gsi_channel_props.ring_len = 2 * in->desc_fifo_sz; else if (IPA_CLIENT_IS_PROD(ep->client)) gsi_channel_props.ring_len = 4 * in->desc_fifo_sz; else gsi_channel_props.ring_len = 2 * in->desc_fifo_sz; gsi_channel_props.ring_base_vaddr = dma_alloc_coherent(ipa3_ctx->pdev, gsi_channel_props.ring_len, &dma_addr, GFP_KERNEL); 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; 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.chan_user_data = ep->sys; 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; result = gsi_alloc_channel(&gsi_channel_props, ipa3_ctx->gsi_dev_hdl, &ep->gsi_chan_hdl); if (result != GSI_STATUS_SUCCESS) goto fail_alloc_channel; memset(&ch_scratch, 0, sizeof(ch_scratch)); 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; 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; } result = gsi_start_channel(ep->gsi_chan_hdl); if (result != GSI_STATUS_SUCCESS) goto fail_start_channel; if (ep->client == IPA_CLIENT_MEMCPY_DMA_SYNC_CONS) gsi_config_channel_mode(ep->gsi_chan_hdl, GSI_CHAN_MODE_POLL); return 0; fail_start_channel: fail_write_channel_scratch: if (gsi_dealloc_channel(ep->gsi_chan_hdl) != GSI_STATUS_SUCCESS) { IPAERR("Failed to dealloc GSI chan.\n"); BUG(); } fail_alloc_channel: dma_free_coherent(ipa3_ctx->pdev, gsi_channel_props.ring_len, gsi_channel_props.ring_base_vaddr, dma_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; } fail_alloc_evt_ring: if (gsi_evt_ring_props.ring_base_vaddr) dma_free_coherent(ipa3_ctx->pdev, gsi_evt_ring_props.ring_len, gsi_evt_ring_props.ring_base_vaddr, evt_dma_addr); IPAERR("Return with err: %d\n", result); return result; } 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%p\n", tx_pkt); desc->pyld = tag_pyld->data; desc->len = tag_pyld->len; desc->user1 = tag_pyld; *tag_pyld_ret = tag_pyld; } return 0; } static int ipa_handle_rx_core_gsi(struct ipa3_sys_context *sys, bool process_all, bool in_poll_state) { int ret; int cnt = 0; struct ipa3_sys_context *sys_ptr; struct ipa3_rx_pkt_wrapper *rx_pkt; struct gsi_chan_xfer_notify xfer_notify; struct ipa_mem_buffer mem_info = {0}; enum ipa_client_type client; if (sys->ep->bytes_xfered_valid) { mem_info.phys_base = sys->ep->phys_base; mem_info.size = (u32)sys->ep->bytes_xfered; sys_ptr = sys; if (IPA_CLIENT_IS_MEMCPY_DMA_CONS(sys->ep->client)) ipa3_dma_memcpy_notify(sys_ptr, &mem_info); else if (IPA_CLIENT_IS_WLAN_CONS(sys->ep->client)) ipa3_wlan_wq_rx_common(sys_ptr, mem_info.size); else ipa3_wq_rx_common(sys_ptr, mem_info.size); cnt++; sys->ep->bytes_xfered_valid = false; } while ((in_poll_state ? atomic_read(&sys->curr_polling_state) : !atomic_read(&sys->curr_polling_state))) { if (cnt && !process_all) break; ret = gsi_poll_channel(sys->ep->gsi_chan_hdl, &xfer_notify); if (ret == GSI_STATUS_POLL_EMPTY) break; else if (ret == GSI_STATUS_SUCCESS) { sys_ptr = (struct ipa3_sys_context *) xfer_notify.chan_user_data; rx_pkt = (struct ipa3_rx_pkt_wrapper *) xfer_notify.xfer_user_data; mem_info.phys_base = rx_pkt->data.dma_addr; mem_info.size = xfer_notify.bytes_xfered; client = sys->ep->client; if (IPA_CLIENT_IS_MEMCPY_DMA_CONS(client)) ipa3_dma_memcpy_notify(sys_ptr, &mem_info); else if (IPA_CLIENT_IS_WLAN_CONS(client)) ipa3_wlan_wq_rx_common(sys_ptr, mem_info.size); else ipa3_wq_rx_common(sys_ptr, mem_info.size); cnt++; } else IPAERR("Poll channel err: %d\n", ret); } return cnt; } static int ipa_handle_rx_core_sps(struct ipa3_sys_context *sys, bool process_all, bool in_poll_state) { struct sps_iovec iov; int ret; int cnt = 0; struct ipa_mem_buffer mem_info = {0}; while ((in_poll_state ? atomic_read(&sys->curr_polling_state) : !atomic_read(&sys->curr_polling_state))) { if (cnt && !process_all) break; ret = sps_get_iovec(sys->ep->ep_hdl, &iov); if (ret) { IPAERR("sps_get_iovec failed %d\n", ret); break; } if (iov.addr == 0) break; mem_info.phys_base = iov.addr; mem_info.size = iov.size; if (IPA_CLIENT_IS_MEMCPY_DMA_CONS(sys->ep->client)) ipa3_dma_memcpy_notify(sys, &mem_info); else if (IPA_CLIENT_IS_WLAN_CONS(sys->ep->client)) ipa3_wlan_wq_rx_common(sys, mem_info.size); else ipa3_wq_rx_common(sys, mem_info.size); cnt++; } 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 (ipa3_is_msm_device()) { temp = (u16) (~((unsigned long) tx_pkt & 0xFFFF000000000000) >> 48); if (temp) { IPAERR("The 16 prefix is not all 1s (%p)\n", tx_pkt); BUG(); } } 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; 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; }