diff options
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info.c')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info.c | 274 |
1 files changed, 274 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info.c b/drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info.c new file mode 100644 index 000000000000..312ee0481ec5 --- /dev/null +++ b/drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info.c @@ -0,0 +1,274 @@ +/****************************************************************************** + * + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2017 Intel Deutschland GmbH + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License 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. + * + * BSD LICENSE + * + * Copyright(c) 2017 Intel Deutschland GmbH + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + *****************************************************************************/ + +#include "iwl-trans.h" +#include "iwl-fh.h" +#include "iwl-context-info.h" +#include "internal.h" +#include "iwl-prph.h" + +static int iwl_pcie_get_num_sections(const struct fw_img *fw, + int start) +{ + int i = 0; + + while (start < fw->num_sec && + fw->sec[start].offset != CPU1_CPU2_SEPARATOR_SECTION && + fw->sec[start].offset != PAGING_SEPARATOR_SECTION) { + start++; + i++; + } + + return i; +} + +static int iwl_pcie_ctxt_info_alloc_dma(struct iwl_trans *trans, + const struct fw_desc *sec, + struct iwl_dram_data *dram) +{ + dram->block = dma_alloc_coherent(trans->dev, sec->len, + &dram->physical, + GFP_KERNEL); + if (!dram->block) + return -ENOMEM; + + dram->size = sec->len; + memcpy(dram->block, sec->data, sec->len); + + return 0; +} + +static void iwl_pcie_ctxt_info_free_fw_img(struct iwl_trans *trans) +{ + struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); + struct iwl_self_init_dram *dram = &trans_pcie->init_dram; + int i; + + if (!dram->fw) { + WARN_ON(dram->fw_cnt); + return; + } + + for (i = 0; i < dram->fw_cnt; i++) + dma_free_coherent(trans->dev, dram->fw[i].size, + dram->fw[i].block, dram->fw[i].physical); + + kfree(dram->fw); + dram->fw_cnt = 0; +} + +void iwl_pcie_ctxt_info_free_paging(struct iwl_trans *trans) +{ + struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); + struct iwl_self_init_dram *dram = &trans_pcie->init_dram; + int i; + + if (!dram->paging) { + WARN_ON(dram->paging_cnt); + return; + } + + /* free paging*/ + for (i = 0; i < dram->paging_cnt; i++) + dma_free_coherent(trans->dev, dram->paging[i].size, + dram->paging[i].block, + dram->paging[i].physical); + + kfree(dram->paging); + dram->paging_cnt = 0; +} + +static int iwl_pcie_ctxt_info_init_fw_sec(struct iwl_trans *trans, + const struct fw_img *fw, + struct iwl_context_info *ctxt_info) +{ + struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); + struct iwl_self_init_dram *dram = &trans_pcie->init_dram; + struct iwl_context_info_dram *ctxt_dram = &ctxt_info->dram; + int i, ret, lmac_cnt, umac_cnt, paging_cnt; + + lmac_cnt = iwl_pcie_get_num_sections(fw, 0); + /* add 1 due to separator */ + umac_cnt = iwl_pcie_get_num_sections(fw, lmac_cnt + 1); + /* add 2 due to separators */ + paging_cnt = iwl_pcie_get_num_sections(fw, lmac_cnt + umac_cnt + 2); + + dram->fw = kcalloc(umac_cnt + lmac_cnt, sizeof(*dram->fw), GFP_KERNEL); + if (!dram->fw) + return -ENOMEM; + dram->paging = kcalloc(paging_cnt, sizeof(*dram->paging), GFP_KERNEL); + if (!dram->paging) + return -ENOMEM; + + /* initialize lmac sections */ + for (i = 0; i < lmac_cnt; i++) { + ret = iwl_pcie_ctxt_info_alloc_dma(trans, &fw->sec[i], + &dram->fw[dram->fw_cnt]); + if (ret) + return ret; + ctxt_dram->lmac_img[i] = + cpu_to_le64(dram->fw[dram->fw_cnt].physical); + dram->fw_cnt++; + } + + /* initialize umac sections */ + for (i = 0; i < umac_cnt; i++) { + /* access FW with +1 to make up for lmac separator */ + ret = iwl_pcie_ctxt_info_alloc_dma(trans, + &fw->sec[dram->fw_cnt + 1], + &dram->fw[dram->fw_cnt]); + if (ret) + return ret; + ctxt_dram->umac_img[i] = + cpu_to_le64(dram->fw[dram->fw_cnt].physical); + dram->fw_cnt++; + } + + /* + * Initialize paging. + * Paging memory isn't stored in dram->fw as the umac and lmac - it is + * stored separately. + * This is since the timing of its release is different - + * while fw memory can be released on alive, the paging memory can be + * freed only when the device goes down. + * Given that, the logic here in accessing the fw image is a bit + * different - fw_cnt isn't changing so loop counter is added to it. + */ + for (i = 0; i < paging_cnt; i++) { + /* access FW with +2 to make up for lmac & umac separators */ + int fw_idx = dram->fw_cnt + i + 2; + + ret = iwl_pcie_ctxt_info_alloc_dma(trans, &fw->sec[fw_idx], + &dram->paging[i]); + if (ret) + return ret; + + ctxt_dram->virtual_img[i] = + cpu_to_le64(dram->paging[i].physical); + dram->paging_cnt++; + } + + return 0; +} + +int iwl_pcie_ctxt_info_init(struct iwl_trans *trans, + const struct fw_img *fw) +{ + struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); + struct iwl_context_info *ctxt_info; + struct iwl_context_info_rbd_cfg *rx_cfg; + u32 control_flags = 0; + int ret; + + ctxt_info = dma_alloc_coherent(trans->dev, sizeof(*ctxt_info), + &trans_pcie->ctxt_info_dma_addr, + GFP_KERNEL); + if (!ctxt_info) + return -ENOMEM; + + ctxt_info->version.version = 0; + ctxt_info->version.mac_id = + cpu_to_le16((u16)iwl_read32(trans, CSR_HW_REV)); + /* size is in DWs */ + ctxt_info->version.size = cpu_to_le16(sizeof(*ctxt_info) / 4); + + BUILD_BUG_ON(RX_QUEUE_CB_SIZE(MQ_RX_TABLE_SIZE) > 0xF); + control_flags = IWL_CTXT_INFO_RB_SIZE_4K | + IWL_CTXT_INFO_TFD_FORMAT_LONG | + RX_QUEUE_CB_SIZE(MQ_RX_TABLE_SIZE) << + IWL_CTXT_INFO_RB_CB_SIZE_POS; + ctxt_info->control.control_flags = cpu_to_le32(control_flags); + + /* initialize RX default queue */ + rx_cfg = &ctxt_info->rbd_cfg; + rx_cfg->free_rbd_addr = cpu_to_le64(trans_pcie->rxq->bd_dma); + rx_cfg->used_rbd_addr = cpu_to_le64(trans_pcie->rxq->used_bd_dma); + rx_cfg->status_wr_ptr = cpu_to_le64(trans_pcie->rxq->rb_stts_dma); + + /* initialize TX command queue */ + ctxt_info->hcmd_cfg.cmd_queue_addr = + cpu_to_le64(trans_pcie->txq[trans_pcie->cmd_queue].dma_addr); + ctxt_info->hcmd_cfg.cmd_queue_size = + TFD_QUEUE_CB_SIZE(TFD_QUEUE_SIZE_MAX); + + /* allocate ucode sections in dram and set addresses */ + ret = iwl_pcie_ctxt_info_init_fw_sec(trans, fw, ctxt_info); + if (ret) + return ret; + + trans_pcie->ctxt_info = ctxt_info; + + iwl_enable_interrupts(trans); + + /* kick FW self load */ + iwl_write64(trans, CSR_CTXT_INFO_BA, trans_pcie->ctxt_info_dma_addr); + iwl_write_prph(trans, UREG_CPU_INIT_RUN, 1); + + /* Context info will be released upon alive or failure to get one */ + + return 0; +} + +void iwl_pcie_ctxt_info_free(struct iwl_trans *trans) +{ + struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); + + if (!trans_pcie->ctxt_info) + return; + + dma_free_coherent(trans->dev, sizeof(*trans_pcie->ctxt_info), + trans_pcie->ctxt_info, + trans_pcie->ctxt_info_dma_addr); + trans_pcie->ctxt_info_dma_addr = 0; + trans_pcie->ctxt_info = NULL; + + iwl_pcie_ctxt_info_free_fw_img(trans); +} |