diff options
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/pcie/trans.c')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/pcie/trans.c | 2717 |
1 files changed, 0 insertions, 2717 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c deleted file mode 100644 index 80cab4ec0522..000000000000 --- a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c +++ /dev/null @@ -1,2717 +0,0 @@ -/****************************************************************************** - * - * 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) 2007 - 2015 Intel Corporation. All rights reserved. - * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH - * Copyright(c) 2016 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. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, - * USA - * - * The full GNU General Public License is included in this distribution - * in the file called COPYING. - * - * Contact Information: - * Intel Linux Wireless <linuxwifi@intel.com> - * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 - * - * BSD LICENSE - * - * Copyright(c) 2005 - 2015 Intel Corporation. All rights reserved. - * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH - * Copyright(c) 2016 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 <linux/pci.h> -#include <linux/pci-aspm.h> -#include <linux/interrupt.h> -#include <linux/debugfs.h> -#include <linux/sched.h> -#include <linux/bitops.h> -#include <linux/gfp.h> -#include <linux/vmalloc.h> - -#include "iwl-drv.h" -#include "iwl-trans.h" -#include "iwl-csr.h" -#include "iwl-prph.h" -#include "iwl-scd.h" -#include "iwl-agn-hw.h" -#include "iwl-fw-error-dump.h" -#include "internal.h" -#include "iwl-fh.h" - -/* extended range in FW SRAM */ -#define IWL_FW_MEM_EXTENDED_START 0x40000 -#define IWL_FW_MEM_EXTENDED_END 0x57FFF - -static void iwl_pcie_free_fw_monitor(struct iwl_trans *trans) -{ - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - - if (!trans_pcie->fw_mon_page) - return; - - dma_unmap_page(trans->dev, trans_pcie->fw_mon_phys, - trans_pcie->fw_mon_size, DMA_FROM_DEVICE); - __free_pages(trans_pcie->fw_mon_page, - get_order(trans_pcie->fw_mon_size)); - trans_pcie->fw_mon_page = NULL; - trans_pcie->fw_mon_phys = 0; - trans_pcie->fw_mon_size = 0; -} - -static void iwl_pcie_alloc_fw_monitor(struct iwl_trans *trans, u8 max_power) -{ - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - struct page *page = NULL; - dma_addr_t phys; - u32 size = 0; - u8 power; - - if (!max_power) { - /* default max_power is maximum */ - max_power = 26; - } else { - max_power += 11; - } - - if (WARN(max_power > 26, - "External buffer size for monitor is too big %d, check the FW TLV\n", - max_power)) - return; - - if (trans_pcie->fw_mon_page) { - dma_sync_single_for_device(trans->dev, trans_pcie->fw_mon_phys, - trans_pcie->fw_mon_size, - DMA_FROM_DEVICE); - return; - } - - phys = 0; - for (power = max_power; power >= 11; power--) { - int order; - - size = BIT(power); - order = get_order(size); - page = alloc_pages(__GFP_COMP | __GFP_NOWARN | __GFP_ZERO, - order); - if (!page) - continue; - - phys = dma_map_page(trans->dev, page, 0, PAGE_SIZE << order, - DMA_FROM_DEVICE); - if (dma_mapping_error(trans->dev, phys)) { - __free_pages(page, order); - page = NULL; - continue; - } - IWL_INFO(trans, - "Allocated 0x%08x bytes (order %d) for firmware monitor.\n", - size, order); - break; - } - - if (WARN_ON_ONCE(!page)) - return; - - if (power != max_power) - IWL_ERR(trans, - "Sorry - debug buffer is only %luK while you requested %luK\n", - (unsigned long)BIT(power - 10), - (unsigned long)BIT(max_power - 10)); - - trans_pcie->fw_mon_page = page; - trans_pcie->fw_mon_phys = phys; - trans_pcie->fw_mon_size = size; -} - -static u32 iwl_trans_pcie_read_shr(struct iwl_trans *trans, u32 reg) -{ - iwl_write32(trans, HEEP_CTRL_WRD_PCIEX_CTRL_REG, - ((reg & 0x0000ffff) | (2 << 28))); - return iwl_read32(trans, HEEP_CTRL_WRD_PCIEX_DATA_REG); -} - -static void iwl_trans_pcie_write_shr(struct iwl_trans *trans, u32 reg, u32 val) -{ - iwl_write32(trans, HEEP_CTRL_WRD_PCIEX_DATA_REG, val); - iwl_write32(trans, HEEP_CTRL_WRD_PCIEX_CTRL_REG, - ((reg & 0x0000ffff) | (3 << 28))); -} - -static void iwl_pcie_set_pwr(struct iwl_trans *trans, bool vaux) -{ - if (trans->cfg->apmg_not_supported) - return; - - if (vaux && pci_pme_capable(to_pci_dev(trans->dev), PCI_D3cold)) - iwl_set_bits_mask_prph(trans, APMG_PS_CTRL_REG, - APMG_PS_CTRL_VAL_PWR_SRC_VAUX, - ~APMG_PS_CTRL_MSK_PWR_SRC); - else - iwl_set_bits_mask_prph(trans, APMG_PS_CTRL_REG, - APMG_PS_CTRL_VAL_PWR_SRC_VMAIN, - ~APMG_PS_CTRL_MSK_PWR_SRC); -} - -/* PCI registers */ -#define PCI_CFG_RETRY_TIMEOUT 0x041 - -static void iwl_pcie_apm_config(struct iwl_trans *trans) -{ - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - u16 lctl; - u16 cap; - - /* - * HW bug W/A for instability in PCIe bus L0S->L1 transition. - * Check if BIOS (or OS) enabled L1-ASPM on this device. - * If so (likely), disable L0S, so device moves directly L0->L1; - * costs negligible amount of power savings. - * If not (unlikely), enable L0S, so there is at least some - * power savings, even without L1. - */ - pcie_capability_read_word(trans_pcie->pci_dev, PCI_EXP_LNKCTL, &lctl); - if (lctl & PCI_EXP_LNKCTL_ASPM_L1) - iwl_set_bit(trans, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED); - else - iwl_clear_bit(trans, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED); - trans->pm_support = !(lctl & PCI_EXP_LNKCTL_ASPM_L0S); - - pcie_capability_read_word(trans_pcie->pci_dev, PCI_EXP_DEVCTL2, &cap); - trans->ltr_enabled = cap & PCI_EXP_DEVCTL2_LTR_EN; - dev_info(trans->dev, "L1 %sabled - LTR %sabled\n", - (lctl & PCI_EXP_LNKCTL_ASPM_L1) ? "En" : "Dis", - trans->ltr_enabled ? "En" : "Dis"); -} - -/* - * Start up NIC's basic functionality after it has been reset - * (e.g. after platform boot, or shutdown via iwl_pcie_apm_stop()) - * NOTE: This does not load uCode nor start the embedded processor - */ -static int iwl_pcie_apm_init(struct iwl_trans *trans) -{ - int ret = 0; - IWL_DEBUG_INFO(trans, "Init card's basic functions\n"); - - /* - * Use "set_bit" below rather than "write", to preserve any hardware - * bits already set by default after reset. - */ - - /* Disable L0S exit timer (platform NMI Work/Around) */ - if (trans->cfg->device_family != IWL_DEVICE_FAMILY_8000) - iwl_set_bit(trans, CSR_GIO_CHICKEN_BITS, - CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER); - - /* - * Disable L0s without affecting L1; - * don't wait for ICH L0s (ICH bug W/A) - */ - iwl_set_bit(trans, CSR_GIO_CHICKEN_BITS, - CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX); - - /* Set FH wait threshold to maximum (HW error during stress W/A) */ - iwl_set_bit(trans, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL); - - /* - * Enable HAP INTA (interrupt from management bus) to - * wake device's PCI Express link L1a -> L0s - */ - iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG, - CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A); - - iwl_pcie_apm_config(trans); - - /* Configure analog phase-lock-loop before activating to D0A */ - if (trans->cfg->base_params->pll_cfg_val) - iwl_set_bit(trans, CSR_ANA_PLL_CFG, - trans->cfg->base_params->pll_cfg_val); - - /* - * Set "initialization complete" bit to move adapter from - * D0U* --> D0A* (powered-up active) state. - */ - iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE); - - /* - * Wait for clock stabilization; once stabilized, access to - * device-internal resources is supported, e.g. iwl_write_prph() - * and accesses to uCode SRAM. - */ - ret = iwl_poll_bit(trans, CSR_GP_CNTRL, - CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, - CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000); - if (ret < 0) { - IWL_DEBUG_INFO(trans, "Failed to init the card\n"); - goto out; - } - - if (trans->cfg->host_interrupt_operation_mode) { - /* - * This is a bit of an abuse - This is needed for 7260 / 3160 - * only check host_interrupt_operation_mode even if this is - * not related to host_interrupt_operation_mode. - * - * Enable the oscillator to count wake up time for L1 exit. This - * consumes slightly more power (100uA) - but allows to be sure - * that we wake up from L1 on time. - * - * This looks weird: read twice the same register, discard the - * value, set a bit, and yet again, read that same register - * just to discard the value. But that's the way the hardware - * seems to like it. - */ - iwl_read_prph(trans, OSC_CLK); - iwl_read_prph(trans, OSC_CLK); - iwl_set_bits_prph(trans, OSC_CLK, OSC_CLK_FORCE_CONTROL); - iwl_read_prph(trans, OSC_CLK); - iwl_read_prph(trans, OSC_CLK); - } - - /* - * Enable DMA clock and wait for it to stabilize. - * - * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" - * bits do not disable clocks. This preserves any hardware - * bits already set by default in "CLK_CTRL_REG" after reset. - */ - if (!trans->cfg->apmg_not_supported) { - iwl_write_prph(trans, APMG_CLK_EN_REG, - APMG_CLK_VAL_DMA_CLK_RQT); - udelay(20); - - /* Disable L1-Active */ - iwl_set_bits_prph(trans, APMG_PCIDEV_STT_REG, - APMG_PCIDEV_STT_VAL_L1_ACT_DIS); - - /* Clear the interrupt in APMG if the NIC is in RFKILL */ - iwl_write_prph(trans, APMG_RTC_INT_STT_REG, - APMG_RTC_INT_STT_RFKILL); - } - - set_bit(STATUS_DEVICE_ENABLED, &trans->status); - -out: - return ret; -} - -/* - * Enable LP XTAL to avoid HW bug where device may consume much power if - * FW is not loaded after device reset. LP XTAL is disabled by default - * after device HW reset. Do it only if XTAL is fed by internal source. - * Configure device's "persistence" mode to avoid resetting XTAL again when - * SHRD_HW_RST occurs in S3. - */ -static void iwl_pcie_apm_lp_xtal_enable(struct iwl_trans *trans) -{ - int ret; - u32 apmg_gp1_reg; - u32 apmg_xtal_cfg_reg; - u32 dl_cfg_reg; - - /* Force XTAL ON */ - __iwl_trans_pcie_set_bit(trans, CSR_GP_CNTRL, - CSR_GP_CNTRL_REG_FLAG_XTAL_ON); - - /* Reset entire device - do controller reset (results in SHRD_HW_RST) */ - iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET); - - udelay(10); - - /* - * Set "initialization complete" bit to move adapter from - * D0U* --> D0A* (powered-up active) state. - */ - iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE); - - /* - * Wait for clock stabilization; once stabilized, access to - * device-internal resources is possible. - */ - ret = iwl_poll_bit(trans, CSR_GP_CNTRL, - CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, - CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, - 25000); - if (WARN_ON(ret < 0)) { - IWL_ERR(trans, "Access time out - failed to enable LP XTAL\n"); - /* Release XTAL ON request */ - __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL, - CSR_GP_CNTRL_REG_FLAG_XTAL_ON); - return; - } - - /* - * Clear "disable persistence" to avoid LP XTAL resetting when - * SHRD_HW_RST is applied in S3. - */ - iwl_clear_bits_prph(trans, APMG_PCIDEV_STT_REG, - APMG_PCIDEV_STT_VAL_PERSIST_DIS); - - /* - * Force APMG XTAL to be active to prevent its disabling by HW - * caused by APMG idle state. - */ - apmg_xtal_cfg_reg = iwl_trans_pcie_read_shr(trans, - SHR_APMG_XTAL_CFG_REG); - iwl_trans_pcie_write_shr(trans, SHR_APMG_XTAL_CFG_REG, - apmg_xtal_cfg_reg | - SHR_APMG_XTAL_CFG_XTAL_ON_REQ); - - /* - * Reset entire device again - do controller reset (results in - * SHRD_HW_RST). Turn MAC off before proceeding. - */ - iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET); - - udelay(10); - - /* Enable LP XTAL by indirect access through CSR */ - apmg_gp1_reg = iwl_trans_pcie_read_shr(trans, SHR_APMG_GP1_REG); - iwl_trans_pcie_write_shr(trans, SHR_APMG_GP1_REG, apmg_gp1_reg | - SHR_APMG_GP1_WF_XTAL_LP_EN | - SHR_APMG_GP1_CHICKEN_BIT_SELECT); - - /* Clear delay line clock power up */ - dl_cfg_reg = iwl_trans_pcie_read_shr(trans, SHR_APMG_DL_CFG_REG); - iwl_trans_pcie_write_shr(trans, SHR_APMG_DL_CFG_REG, dl_cfg_reg & - ~SHR_APMG_DL_CFG_DL_CLOCK_POWER_UP); - - /* - * Enable persistence mode to avoid LP XTAL resetting when - * SHRD_HW_RST is applied in S3. - */ - iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG, - CSR_HW_IF_CONFIG_REG_PERSIST_MODE); - - /* - * Clear "initialization complete" bit to move adapter from - * D0A* (powered-up Active) --> D0U* (Uninitialized) state. - */ - iwl_clear_bit(trans, CSR_GP_CNTRL, - CSR_GP_CNTRL_REG_FLAG_INIT_DONE); - - /* Activates XTAL resources monitor */ - __iwl_trans_pcie_set_bit(trans, CSR_MONITOR_CFG_REG, - CSR_MONITOR_XTAL_RESOURCES); - - /* Release XTAL ON request */ - __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL, - CSR_GP_CNTRL_REG_FLAG_XTAL_ON); - udelay(10); - - /* Release APMG XTAL */ - iwl_trans_pcie_write_shr(trans, SHR_APMG_XTAL_CFG_REG, - apmg_xtal_cfg_reg & - ~SHR_APMG_XTAL_CFG_XTAL_ON_REQ); -} - -static int iwl_pcie_apm_stop_master(struct iwl_trans *trans) -{ - int ret = 0; - - /* stop device's busmaster DMA activity */ - iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER); - - ret = iwl_poll_bit(trans, CSR_RESET, - CSR_RESET_REG_FLAG_MASTER_DISABLED, - CSR_RESET_REG_FLAG_MASTER_DISABLED, 100); - if (ret < 0) - IWL_WARN(trans, "Master Disable Timed Out, 100 usec\n"); - - IWL_DEBUG_INFO(trans, "stop master\n"); - - return ret; -} - -static void iwl_pcie_apm_stop(struct iwl_trans *trans, bool op_mode_leave) -{ - IWL_DEBUG_INFO(trans, "Stop card, put in low power state\n"); - - if (op_mode_leave) { - if (!test_bit(STATUS_DEVICE_ENABLED, &trans->status)) - iwl_pcie_apm_init(trans); - - /* inform ME that we are leaving */ - if (trans->cfg->device_family == IWL_DEVICE_FAMILY_7000) - iwl_set_bits_prph(trans, APMG_PCIDEV_STT_REG, - APMG_PCIDEV_STT_VAL_WAKE_ME); - else if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000) { - iwl_set_bit(trans, CSR_DBG_LINK_PWR_MGMT_REG, - CSR_RESET_LINK_PWR_MGMT_DISABLED); - iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG, - CSR_HW_IF_CONFIG_REG_PREPARE | - CSR_HW_IF_CONFIG_REG_ENABLE_PME); - mdelay(1); - iwl_clear_bit(trans, CSR_DBG_LINK_PWR_MGMT_REG, - CSR_RESET_LINK_PWR_MGMT_DISABLED); - } - mdelay(5); - } - - clear_bit(STATUS_DEVICE_ENABLED, &trans->status); - - /* Stop device's DMA activity */ - iwl_pcie_apm_stop_master(trans); - - if (trans->cfg->lp_xtal_workaround) { - iwl_pcie_apm_lp_xtal_enable(trans); - return; - } - - /* Reset the entire device */ - iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET); - - udelay(10); - - /* - * Clear "initialization complete" bit to move adapter from - * D0A* (powered-up Active) --> D0U* (Uninitialized) state. - */ - iwl_clear_bit(trans, CSR_GP_CNTRL, - CSR_GP_CNTRL_REG_FLAG_INIT_DONE); -} - -static int iwl_pcie_nic_init(struct iwl_trans *trans) -{ - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - - /* nic_init */ - spin_lock(&trans_pcie->irq_lock); - iwl_pcie_apm_init(trans); - - spin_unlock(&trans_pcie->irq_lock); - - iwl_pcie_set_pwr(trans, false); - - iwl_op_mode_nic_config(trans->op_mode); - - /* Allocate the RX queue, or reset if it is already allocated */ - iwl_pcie_rx_init(trans); - - /* Allocate or reset and init all Tx and Command queues */ - if (iwl_pcie_tx_init(trans)) - return -ENOMEM; - - if (trans->cfg->base_params->shadow_reg_enable) { - /* enable shadow regs in HW */ - iwl_set_bit(trans, CSR_MAC_SHADOW_REG_CTRL, 0x800FFFFF); - IWL_DEBUG_INFO(trans, "Enabling shadow registers in device\n"); - } - - return 0; -} - -#define HW_READY_TIMEOUT (50) - -/* Note: returns poll_bit return value, which is >= 0 if success */ -static int iwl_pcie_set_hw_ready(struct iwl_trans *trans) -{ - int ret; - - iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG, - CSR_HW_IF_CONFIG_REG_BIT_NIC_READY); - - /* See if we got it */ - ret = iwl_poll_bit(trans, CSR_HW_IF_CONFIG_REG, - CSR_HW_IF_CONFIG_REG_BIT_NIC_READY, - CSR_HW_IF_CONFIG_REG_BIT_NIC_READY, - HW_READY_TIMEOUT); - - if (ret >= 0) - iwl_set_bit(trans, CSR_MBOX_SET_REG, CSR_MBOX_SET_REG_OS_ALIVE); - - IWL_DEBUG_INFO(trans, "hardware%s ready\n", ret < 0 ? " not" : ""); - return ret; -} - -/* Note: returns standard 0/-ERROR code */ -static int iwl_pcie_prepare_card_hw(struct iwl_trans *trans) -{ - int ret; - int t = 0; - int iter; - - IWL_DEBUG_INFO(trans, "iwl_trans_prepare_card_hw enter\n"); - - ret = iwl_pcie_set_hw_ready(trans); - /* If the card is ready, exit 0 */ - if (ret >= 0) - return 0; - - iwl_set_bit(trans, CSR_DBG_LINK_PWR_MGMT_REG, - CSR_RESET_LINK_PWR_MGMT_DISABLED); - msleep(1); - - for (iter = 0; iter < 10; iter++) { - /* If HW is not ready, prepare the conditions to check again */ - iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG, - CSR_HW_IF_CONFIG_REG_PREPARE); - - do { - ret = iwl_pcie_set_hw_ready(trans); - if (ret >= 0) - return 0; - - usleep_range(200, 1000); - t += 200; - } while (t < 150000); - msleep(25); - } - - IWL_ERR(trans, "Couldn't prepare the card\n"); - - return ret; -} - -/* - * ucode - */ -static int iwl_pcie_load_firmware_chunk(struct iwl_trans *trans, u32 dst_addr, - dma_addr_t phy_addr, u32 byte_cnt) -{ - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - int ret; - - trans_pcie->ucode_write_complete = false; - - iwl_write_direct32(trans, - FH_TCSR_CHNL_TX_CONFIG_REG(FH_SRVC_CHNL), - FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE); - - iwl_write_direct32(trans, - FH_SRVC_CHNL_SRAM_ADDR_REG(FH_SRVC_CHNL), - dst_addr); - - iwl_write_direct32(trans, - FH_TFDIB_CTRL0_REG(FH_SRVC_CHNL), - phy_addr & FH_MEM_TFDIB_DRAM_ADDR_LSB_MSK); - - iwl_write_direct32(trans, - FH_TFDIB_CTRL1_REG(FH_SRVC_CHNL), - (iwl_get_dma_hi_addr(phy_addr) - << FH_MEM_TFDIB_REG1_ADDR_BITSHIFT) | byte_cnt); - - iwl_write_direct32(trans, - FH_TCSR_CHNL_TX_BUF_STS_REG(FH_SRVC_CHNL), - 1 << FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_NUM | - 1 << FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_IDX | - FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_VALID); - - iwl_write_direct32(trans, - FH_TCSR_CHNL_TX_CONFIG_REG(FH_SRVC_CHNL), - FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE | - FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_DISABLE | - FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_ENDTFD); - - ret = wait_event_timeout(trans_pcie->ucode_write_waitq, - trans_pcie->ucode_write_complete, 5 * HZ); - if (!ret) { - IWL_ERR(trans, "Failed to load firmware chunk!\n"); - return -ETIMEDOUT; - } - - return 0; -} - -static int iwl_pcie_load_section(struct iwl_trans *trans, u8 section_num, - const struct fw_desc *section) -{ - u8 *v_addr; - dma_addr_t p_addr; - u32 offset, chunk_sz = min_t(u32, FH_MEM_TB_MAX_LENGTH, section->len); - int ret = 0; - - IWL_DEBUG_FW(trans, "[%d] uCode section being loaded...\n", - section_num); - - v_addr = dma_alloc_coherent(trans->dev, chunk_sz, &p_addr, - GFP_KERNEL | __GFP_NOWARN); - if (!v_addr) { - IWL_DEBUG_INFO(trans, "Falling back to small chunks of DMA\n"); - chunk_sz = PAGE_SIZE; - v_addr = dma_alloc_coherent(trans->dev, chunk_sz, - &p_addr, GFP_KERNEL); - if (!v_addr) - return -ENOMEM; - } - - for (offset = 0; offset < section->len; offset += chunk_sz) { - u32 copy_size, dst_addr; - bool extended_addr = false; - - copy_size = min_t(u32, chunk_sz, section->len - offset); - dst_addr = section->offset + offset; - - if (dst_addr >= IWL_FW_MEM_EXTENDED_START && - dst_addr <= IWL_FW_MEM_EXTENDED_END) - extended_addr = true; - - if (extended_addr) - iwl_set_bits_prph(trans, LMPM_CHICK, - LMPM_CHICK_EXTENDED_ADDR_SPACE); - - memcpy(v_addr, (u8 *)section->data + offset, copy_size); - ret = iwl_pcie_load_firmware_chunk(trans, dst_addr, p_addr, - copy_size); - - if (extended_addr) - iwl_clear_bits_prph(trans, LMPM_CHICK, - LMPM_CHICK_EXTENDED_ADDR_SPACE); - - if (ret) { - IWL_ERR(trans, - "Could not load the [%d] uCode section\n", - section_num); - break; - } - } - - dma_free_coherent(trans->dev, chunk_sz, v_addr, p_addr); - return ret; -} - -/* - * Driver Takes the ownership on secure machine before FW load - * and prevent race with the BT load. - * W/A for ROM bug. (should be remove in the next Si step) - */ -static int iwl_pcie_rsa_race_bug_wa(struct iwl_trans *trans) -{ - u32 val, loop = 1000; - - /* - * Check the RSA semaphore is accessible. - * If the HW isn't locked and the rsa semaphore isn't accessible, - * we are in trouble. - */ - val = iwl_read_prph(trans, PREG_AUX_BUS_WPROT_0); - if (val & (BIT(1) | BIT(17))) { - IWL_DEBUG_INFO(trans, - "can't access the RSA semaphore it is write protected\n"); - return 0; - } - - /* take ownership on the AUX IF */ - iwl_write_prph(trans, WFPM_CTRL_REG, WFPM_AUX_CTL_AUX_IF_MAC_OWNER_MSK); - iwl_write_prph(trans, AUX_MISC_MASTER1_EN, AUX_MISC_MASTER1_EN_SBE_MSK); - - do { - iwl_write_prph(trans, AUX_MISC_MASTER1_SMPHR_STATUS, 0x1); - val = iwl_read_prph(trans, AUX_MISC_MASTER1_SMPHR_STATUS); - if (val == 0x1) { - iwl_write_prph(trans, RSA_ENABLE, 0); - return 0; - } - - udelay(10); - loop--; - } while (loop > 0); - - IWL_ERR(trans, "Failed to take ownership on secure machine\n"); - return -EIO; -} - -static int iwl_pcie_load_cpu_sections_8000(struct iwl_trans *trans, - const struct fw_img *image, - int cpu, - int *first_ucode_section) -{ - int shift_param; - int i, ret = 0, sec_num = 0x1; - u32 val, last_read_idx = 0; - - if (cpu == 1) { - shift_param = 0; - *first_ucode_section = 0; - } else { - shift_param = 16; - (*first_ucode_section)++; - } - - for (i = *first_ucode_section; i < IWL_UCODE_SECTION_MAX; i++) { - last_read_idx = i; - - /* - * CPU1_CPU2_SEPARATOR_SECTION delimiter - separate between - * CPU1 to CPU2. - * PAGING_SEPARATOR_SECTION delimiter - separate between - * CPU2 non paged to CPU2 paging sec. - */ - if (!image->sec[i].data || - image->sec[i].offset == CPU1_CPU2_SEPARATOR_SECTION || - image->sec[i].offset == PAGING_SEPARATOR_SECTION) { - IWL_DEBUG_FW(trans, - "Break since Data not valid or Empty section, sec = %d\n", - i); - break; - } - - ret = iwl_pcie_load_section(trans, i, &image->sec[i]); - if (ret) - return ret; - - /* Notify the ucode of the loaded section number and status */ - val = iwl_read_direct32(trans, FH_UCODE_LOAD_STATUS); - val = val | (sec_num << shift_param); - iwl_write_direct32(trans, FH_UCODE_LOAD_STATUS, val); - sec_num = (sec_num << 1) | 0x1; - } - - *first_ucode_section = last_read_idx; - - if (cpu == 1) - iwl_write_direct32(trans, FH_UCODE_LOAD_STATUS, 0xFFFF); - else - iwl_write_direct32(trans, FH_UCODE_LOAD_STATUS, 0xFFFFFFFF); - - return 0; -} - -static int iwl_pcie_load_cpu_sections(struct iwl_trans *trans, - const struct fw_img *image, - int cpu, - int *first_ucode_section) -{ - int shift_param; - int i, ret = 0; - u32 last_read_idx = 0; - - if (cpu == 1) { - shift_param = 0; - *first_ucode_section = 0; - } else { - shift_param = 16; - (*first_ucode_section)++; - } - - for (i = *first_ucode_section; i < IWL_UCODE_SECTION_MAX; i++) { - last_read_idx = i; - - /* - * CPU1_CPU2_SEPARATOR_SECTION delimiter - separate between - * CPU1 to CPU2. - * PAGING_SEPARATOR_SECTION delimiter - separate between - * CPU2 non paged to CPU2 paging sec. - */ - if (!image->sec[i].data || - image->sec[i].offset == CPU1_CPU2_SEPARATOR_SECTION || - image->sec[i].offset == PAGING_SEPARATOR_SECTION) { - IWL_DEBUG_FW(trans, - "Break since Data not valid or Empty section, sec = %d\n", - i); - break; - } - - ret = iwl_pcie_load_section(trans, i, &image->sec[i]); - if (ret) - return ret; - } - - if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000) - iwl_set_bits_prph(trans, - CSR_UCODE_LOAD_STATUS_ADDR, - (LMPM_CPU_UCODE_LOADING_COMPLETED | - LMPM_CPU_HDRS_LOADING_COMPLETED | - LMPM_CPU_UCODE_LOADING_STARTED) << - shift_param); - - *first_ucode_section = last_read_idx; - - return 0; -} - -static void iwl_pcie_apply_destination(struct iwl_trans *trans) -{ - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - const struct iwl_fw_dbg_dest_tlv *dest = trans->dbg_dest_tlv; - int i; - - if (dest->version) - IWL_ERR(trans, - "DBG DEST version is %d - expect issues\n", - dest->version); - - IWL_INFO(trans, "Applying debug destination %s\n", - get_fw_dbg_mode_string(dest->monitor_mode)); - - if (dest->monitor_mode == EXTERNAL_MODE) - iwl_pcie_alloc_fw_monitor(trans, dest->size_power); - else - IWL_WARN(trans, "PCI should have external buffer debug\n"); - - for (i = 0; i < trans->dbg_dest_reg_num; i++) { - u32 addr = le32_to_cpu(dest->reg_ops[i].addr); - u32 val = le32_to_cpu(dest->reg_ops[i].val); - - switch (dest->reg_ops[i].op) { - case CSR_ASSIGN: - iwl_write32(trans, addr, val); - break; - case CSR_SETBIT: - iwl_set_bit(trans, addr, BIT(val)); - break; - case CSR_CLEARBIT: - iwl_clear_bit(trans, addr, BIT(val)); - break; - case PRPH_ASSIGN: - iwl_write_prph(trans, addr, val); - break; - case PRPH_SETBIT: - iwl_set_bits_prph(trans, addr, BIT(val)); - break; - case PRPH_CLEARBIT: - iwl_clear_bits_prph(trans, addr, BIT(val)); - break; - case PRPH_BLOCKBIT: - if (iwl_read_prph(trans, addr) & BIT(val)) { - IWL_ERR(trans, - "BIT(%u) in address 0x%x is 1, stopping FW configuration\n", - val, addr); - goto monitor; - } - break; - default: - IWL_ERR(trans, "FW debug - unknown OP %d\n", - dest->reg_ops[i].op); - break; - } - } - -monitor: - if (dest->monitor_mode == EXTERNAL_MODE && trans_pcie->fw_mon_size) { - iwl_write_prph(trans, le32_to_cpu(dest->base_reg), - trans_pcie->fw_mon_phys >> dest->base_shift); - if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000) - iwl_write_prph(trans, le32_to_cpu(dest->end_reg), - (trans_pcie->fw_mon_phys + - trans_pcie->fw_mon_size - 256) >> - dest->end_shift); - else - iwl_write_prph(trans, le32_to_cpu(dest->end_reg), - (trans_pcie->fw_mon_phys + - trans_pcie->fw_mon_size) >> - dest->end_shift); - } -} - -static int iwl_pcie_load_given_ucode(struct iwl_trans *trans, - const struct fw_img *image) -{ - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - int ret = 0; - int first_ucode_section; - - IWL_DEBUG_FW(trans, "working with %s CPU\n", - image->is_dual_cpus ? "Dual" : "Single"); - - /* load to FW the binary non secured sections of CPU1 */ - ret = iwl_pcie_load_cpu_sections(trans, image, 1, &first_ucode_section); - if (ret) - return ret; - - if (image->is_dual_cpus) { - /* set CPU2 header address */ - iwl_write_prph(trans, - LMPM_SECURE_UCODE_LOAD_CPU2_HDR_ADDR, - LMPM_SECURE_CPU2_HDR_MEM_SPACE); - - /* load to FW the binary sections of CPU2 */ - ret = iwl_pcie_load_cpu_sections(trans, image, 2, - &first_ucode_section); - if (ret) - return ret; - } - - /* supported for 7000 only for the moment */ - if (iwlwifi_mod_params.fw_monitor && - trans->cfg->device_family == IWL_DEVICE_FAMILY_7000) { - iwl_pcie_alloc_fw_monitor(trans, 0); - - if (trans_pcie->fw_mon_size) { - iwl_write_prph(trans, MON_BUFF_BASE_ADDR, - trans_pcie->fw_mon_phys >> 4); - iwl_write_prph(trans, MON_BUFF_END_ADDR, - (trans_pcie->fw_mon_phys + - trans_pcie->fw_mon_size) >> 4); - } - } else if (trans->dbg_dest_tlv) { - iwl_pcie_apply_destination(trans); - } - - /* release CPU reset */ - iwl_write32(trans, CSR_RESET, 0); - - return 0; -} - -static int iwl_pcie_load_given_ucode_8000(struct iwl_trans *trans, - const struct fw_img *image) -{ - int ret = 0; - int first_ucode_section; - - IWL_DEBUG_FW(trans, "working with %s CPU\n", - image->is_dual_cpus ? "Dual" : "Single"); - - if (trans->dbg_dest_tlv) - iwl_pcie_apply_destination(trans); - - /* TODO: remove in the next Si step */ - ret = iwl_pcie_rsa_race_bug_wa(trans); - if (ret) - return ret; - - /* configure the ucode to be ready to get the secured image */ - /* release CPU reset */ - iwl_write_prph(trans, RELEASE_CPU_RESET, RELEASE_CPU_RESET_BIT); - - /* load to FW the binary Secured sections of CPU1 */ - ret = iwl_pcie_load_cpu_sections_8000(trans, image, 1, - &first_ucode_section); - if (ret) - return ret; - - /* load to FW the binary sections of CPU2 */ - return iwl_pcie_load_cpu_sections_8000(trans, image, 2, - &first_ucode_section); -} - -static int iwl_trans_pcie_start_fw(struct iwl_trans *trans, - const struct fw_img *fw, bool run_in_rfkill) -{ - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - bool hw_rfkill; - int ret; - - mutex_lock(&trans_pcie->mutex); - - /* Someone called stop_device, don't try to start_fw */ - if (trans_pcie->is_down) { - IWL_WARN(trans, - "Can't start_fw since the HW hasn't been started\n"); - ret = EIO; - goto out; - } - - /* This may fail if AMT took ownership of the device */ - if (iwl_pcie_prepare_card_hw(trans)) { - IWL_WARN(trans, "Exit HW not ready\n"); - ret = -EIO; - goto out; - } - - iwl_enable_rfkill_int(trans); - - /* If platform's RF_KILL switch is NOT set to KILL */ - hw_rfkill = iwl_is_rfkill_set(trans); - if (hw_rfkill) - set_bit(STATUS_RFKILL, &trans->status); - else - clear_bit(STATUS_RFKILL, &trans->status); - iwl_trans_pcie_rf_kill(trans, hw_rfkill); - if (hw_rfkill && !run_in_rfkill) { - ret = -ERFKILL; - goto out; - } - - iwl_write32(trans, CSR_INT, 0xFFFFFFFF); - - ret = iwl_pcie_nic_init(trans); - if (ret) { - IWL_ERR(trans, "Unable to init nic\n"); - goto out; - } - - /* make sure rfkill handshake bits are cleared */ - iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); - iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, - CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); - - /* clear (again), then enable host interrupts */ - iwl_write32(trans, CSR_INT, 0xFFFFFFFF); - iwl_enable_interrupts(trans); - - /* really make sure rfkill handshake bits are cleared */ - iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); - iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); - - /* Load the given image to the HW */ - if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000) - ret = iwl_pcie_load_given_ucode_8000(trans, fw); - else - ret = iwl_pcie_load_given_ucode(trans, fw); - -out: - mutex_unlock(&trans_pcie->mutex); - return ret; -} - -static void iwl_trans_pcie_fw_alive(struct iwl_trans *trans, u32 scd_addr) -{ - iwl_pcie_reset_ict(trans); - iwl_pcie_tx_start(trans, scd_addr); -} - -static void _iwl_trans_pcie_stop_device(struct iwl_trans *trans, bool low_power) -{ - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - bool hw_rfkill, was_hw_rfkill; - - lockdep_assert_held(&trans_pcie->mutex); - - if (trans_pcie->is_down) - return; - - trans_pcie->is_down = true; - - was_hw_rfkill = iwl_is_rfkill_set(trans); - - /* tell the device to stop sending interrupts */ - spin_lock(&trans_pcie->irq_lock); - iwl_disable_interrupts(trans); - spin_unlock(&trans_pcie->irq_lock); - - /* device going down, Stop using ICT table */ - iwl_pcie_disable_ict(trans); - - /* - * If a HW restart happens during firmware loading, - * then the firmware loading might call this function - * and later it might be called again due to the - * restart. So don't process again if the device is - * already dead. - */ - if (test_and_clear_bit(STATUS_DEVICE_ENABLED, &trans->status)) { - IWL_DEBUG_INFO(trans, "DEVICE_ENABLED bit was set and is now cleared\n"); - iwl_pcie_tx_stop(trans); - iwl_pcie_rx_stop(trans); - - /* Power-down device's busmaster DMA clocks */ - if (!trans->cfg->apmg_not_supported) { - iwl_write_prph(trans, APMG_CLK_DIS_REG, - APMG_CLK_VAL_DMA_CLK_RQT); - udelay(5); - } - } - - /* Make sure (redundant) we've released our request to stay awake */ - iwl_clear_bit(trans, CSR_GP_CNTRL, - CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); - - /* Stop the device, and put it in low power state */ - iwl_pcie_apm_stop(trans, false); - - /* stop and reset the on-board processor */ - iwl_write32(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET); - udelay(20); - - /* - * Upon stop, the APM issues an interrupt if HW RF kill is set. - * This is a bug in certain verions of the hardware. - * Certain devices also keep sending HW RF kill interrupt all - * the time, unless the interrupt is ACKed even if the interrupt - * should be masked. Re-ACK all the interrupts here. - */ - spin_lock(&trans_pcie->irq_lock); - iwl_disable_interrupts(trans); - spin_unlock(&trans_pcie->irq_lock); - - - /* clear all status bits */ - clear_bit(STATUS_SYNC_HCMD_ACTIVE, &trans->status); - clear_bit(STATUS_INT_ENABLED, &trans->status); - clear_bit(STATUS_TPOWER_PMI, &trans->status); - clear_bit(STATUS_RFKILL, &trans->status); - - /* - * Even if we stop the HW, we still want the RF kill - * interrupt - */ - iwl_enable_rfkill_int(trans); - - /* - * Check again since the RF kill state may have changed while - * all the interrupts were disabled, in this case we couldn't - * receive the RF kill interrupt and update the state in the - * op_mode. - * Don't call the op_mode if the rkfill state hasn't changed. - * This allows the op_mode to call stop_device from the rfkill - * notification without endless recursion. Under very rare - * circumstances, we might have a small recursion if the rfkill - * state changed exactly now while we were called from stop_device. - * This is very unlikely but can happen and is supported. - */ - hw_rfkill = iwl_is_rfkill_set(trans); - if (hw_rfkill) - set_bit(STATUS_RFKILL, &trans->status); - else - clear_bit(STATUS_RFKILL, &trans->status); - if (hw_rfkill != was_hw_rfkill) - iwl_trans_pcie_rf_kill(trans, hw_rfkill); - - /* re-take ownership to prevent other users from stealing the deivce */ - iwl_pcie_prepare_card_hw(trans); -} - -static void iwl_trans_pcie_stop_device(struct iwl_trans *trans, bool low_power) -{ - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - - mutex_lock(&trans_pcie->mutex); - _iwl_trans_pcie_stop_device(trans, low_power); - mutex_unlock(&trans_pcie->mutex); -} - -void iwl_trans_pcie_rf_kill(struct iwl_trans *trans, bool state) -{ - struct iwl_trans_pcie __maybe_unused *trans_pcie = - IWL_TRANS_GET_PCIE_TRANS(trans); - - lockdep_assert_held(&trans_pcie->mutex); - - if (iwl_op_mode_hw_rf_kill(trans->op_mode, state)) - _iwl_trans_pcie_stop_device(trans, true); -} - -static void iwl_trans_pcie_d3_suspend(struct iwl_trans *trans, bool test) -{ - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - - if (trans->system_pm_mode == IWL_PLAT_PM_MODE_D0I3) { - /* Enable persistence mode to avoid reset */ - iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG, - CSR_HW_IF_CONFIG_REG_PERSIST_MODE); - } - - iwl_disable_interrupts(trans); - - /* - * in testing mode, the host stays awake and the - * hardware won't be reset (not even partially) - */ - if (test) - return; - - iwl_pcie_disable_ict(trans); - - synchronize_irq(trans_pcie->pci_dev->irq); - - iwl_clear_bit(trans, CSR_GP_CNTRL, - CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); - iwl_clear_bit(trans, CSR_GP_CNTRL, - CSR_GP_CNTRL_REG_FLAG_INIT_DONE); - - if (trans->system_pm_mode == IWL_PLAT_PM_MODE_D3) { - /* - * reset TX queues -- some of their registers reset during S3 - * so if we don't reset everything here the D3 image would try - * to execute some invalid memory upon resume - */ - iwl_trans_pcie_tx_reset(trans); - } - - iwl_pcie_set_pwr(trans, true); -} - -static int iwl_trans_pcie_d3_resume(struct iwl_trans *trans, - enum iwl_d3_status *status, - bool test) -{ - u32 val; - int ret; - - if (test) { - iwl_enable_interrupts(trans); - *status = IWL_D3_STATUS_ALIVE; - return 0; - } - - /* - * Also enables interrupts - none will happen as the device doesn't - * know we're waking it up, only when the opmode actually tells it - * after this call. - */ - iwl_pcie_reset_ict(trans); - - iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); - iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE); - - if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000) - udelay(2); - - ret = iwl_poll_bit(trans, CSR_GP_CNTRL, - CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, - CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, - 25000); - if (ret < 0) { - IWL_ERR(trans, "Failed to resume the device (mac ready)\n"); - return ret; - } - - iwl_pcie_set_pwr(trans, false); - - if (trans->system_pm_mode == IWL_PLAT_PM_MODE_D0I3) { - iwl_clear_bit(trans, CSR_GP_CNTRL, - CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); - } else { - iwl_trans_pcie_tx_reset(trans); - - ret = iwl_pcie_rx_init(trans); - if (ret) { - IWL_ERR(trans, - "Failed to resume the device (RX reset)\n"); - return ret; - } - } - - val = iwl_read32(trans, CSR_RESET); - if (val & CSR_RESET_REG_FLAG_NEVO_RESET) - *status = IWL_D3_STATUS_RESET; - else - *status = IWL_D3_STATUS_ALIVE; - - return 0; -} - -static int _iwl_trans_pcie_start_hw(struct iwl_trans *trans, bool low_power) -{ - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - bool hw_rfkill; - int err; - - lockdep_assert_held(&trans_pcie->mutex); - - err = iwl_pcie_prepare_card_hw(trans); - if (err) { - IWL_ERR(trans, "Error while preparing HW: %d\n", err); - return err; - } - - /* Reset the entire device */ - iwl_write32(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET); - - usleep_range(10, 15); - - iwl_pcie_apm_init(trans); - - /* From now on, the op_mode will be kept updated about RF kill state */ - iwl_enable_rfkill_int(trans); - - /* Set is_down to false here so that...*/ - trans_pcie->is_down = false; - - hw_rfkill = iwl_is_rfkill_set(trans); - if (hw_rfkill) - set_bit(STATUS_RFKILL, &trans->status); - else - clear_bit(STATUS_RFKILL, &trans->status); - /* ... rfkill can call stop_device and set it false if needed */ - iwl_trans_pcie_rf_kill(trans, hw_rfkill); - - return 0; -} - -static int iwl_trans_pcie_start_hw(struct iwl_trans *trans, bool low_power) -{ - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - int ret; - - mutex_lock(&trans_pcie->mutex); - ret = _iwl_trans_pcie_start_hw(trans, low_power); - mutex_unlock(&trans_pcie->mutex); - - return ret; -} - -static void iwl_trans_pcie_op_mode_leave(struct iwl_trans *trans) -{ - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - - mutex_lock(&trans_pcie->mutex); - - /* disable interrupts - don't enable HW RF kill interrupt */ - spin_lock(&trans_pcie->irq_lock); - iwl_disable_interrupts(trans); - spin_unlock(&trans_pcie->irq_lock); - - iwl_pcie_apm_stop(trans, true); - - spin_lock(&trans_pcie->irq_lock); - iwl_disable_interrupts(trans); - spin_unlock(&trans_pcie->irq_lock); - - iwl_pcie_disable_ict(trans); - - mutex_unlock(&trans_pcie->mutex); - - synchronize_irq(trans_pcie->pci_dev->irq); -} - -static void iwl_trans_pcie_write8(struct iwl_trans *trans, u32 ofs, u8 val) -{ - writeb(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs); -} - -static void iwl_trans_pcie_write32(struct iwl_trans *trans, u32 ofs, u32 val) -{ - writel(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs); -} - -static u32 iwl_trans_pcie_read32(struct iwl_trans *trans, u32 ofs) -{ - return readl(IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs); -} - -static u32 iwl_trans_pcie_read_prph(struct iwl_trans *trans, u32 reg) -{ - iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_RADDR, - ((reg & 0x000FFFFF) | (3 << 24))); - return iwl_trans_pcie_read32(trans, HBUS_TARG_PRPH_RDAT); -} - -static void iwl_trans_pcie_write_prph(struct iwl_trans *trans, u32 addr, - u32 val) -{ - iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_WADDR, - ((addr & 0x000FFFFF) | (3 << 24))); - iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_WDAT, val); -} - -static int iwl_pcie_dummy_napi_poll(struct napi_struct *napi, int budget) -{ - WARN_ON(1); - return 0; -} - -static void iwl_trans_pcie_configure(struct iwl_trans *trans, - const struct iwl_trans_config *trans_cfg) -{ - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - - trans_pcie->cmd_queue = trans_cfg->cmd_queue; - trans_pcie->cmd_fifo = trans_cfg->cmd_fifo; - trans_pcie->cmd_q_wdg_timeout = trans_cfg->cmd_q_wdg_timeout; - if (WARN_ON(trans_cfg->n_no_reclaim_cmds > MAX_NO_RECLAIM_CMDS)) - trans_pcie->n_no_reclaim_cmds = 0; - else - trans_pcie->n_no_reclaim_cmds = trans_cfg->n_no_reclaim_cmds; - if (trans_pcie->n_no_reclaim_cmds) - memcpy(trans_pcie->no_reclaim_cmds, trans_cfg->no_reclaim_cmds, - trans_pcie->n_no_reclaim_cmds * sizeof(u8)); - - trans_pcie->rx_buf_size = trans_cfg->rx_buf_size; - trans_pcie->rx_page_order = - iwl_trans_get_rb_size_order(trans_pcie->rx_buf_size); - - trans_pcie->wide_cmd_header = trans_cfg->wide_cmd_header; - trans_pcie->bc_table_dword = trans_cfg->bc_table_dword; - trans_pcie->scd_set_active = trans_cfg->scd_set_active; - trans_pcie->sw_csum_tx = trans_cfg->sw_csum_tx; - - trans->command_groups = trans_cfg->command_groups; - trans->command_groups_size = trans_cfg->command_groups_size; - - /* init ref_count to 1 (should be cleared when ucode is loaded) */ - trans_pcie->ref_count = 1; - - /* Initialize NAPI here - it should be before registering to mac80211 - * in the opmode but after the HW struct is allocated. - * As this function may be called again in some corner cases don't - * do anything if NAPI was already initialized. - */ - if (!trans_pcie->napi.poll) { - init_dummy_netdev(&trans_pcie->napi_dev); - netif_napi_add(&trans_pcie->napi_dev, &trans_pcie->napi, - iwl_pcie_dummy_napi_poll, 64); - } -} - -void iwl_trans_pcie_free(struct iwl_trans *trans) -{ - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - int i; - - synchronize_irq(trans_pcie->pci_dev->irq); - - iwl_pcie_tx_free(trans); - iwl_pcie_rx_free(trans); - - free_irq(trans_pcie->pci_dev->irq, trans); - iwl_pcie_free_ict(trans); - - pci_disable_msi(trans_pcie->pci_dev); - iounmap(trans_pcie->hw_base); - pci_release_regions(trans_pcie->pci_dev); - pci_disable_device(trans_pcie->pci_dev); - - if (trans_pcie->napi.poll) - netif_napi_del(&trans_pcie->napi); - - iwl_pcie_free_fw_monitor(trans); - - for_each_possible_cpu(i) { - struct iwl_tso_hdr_page *p = - per_cpu_ptr(trans_pcie->tso_hdr_page, i); - - if (p->page) - __free_page(p->page); - } - - free_percpu(trans_pcie->tso_hdr_page); - iwl_trans_free(trans); -} - -static void iwl_trans_pcie_set_pmi(struct iwl_trans *trans, bool state) -{ - if (state) - set_bit(STATUS_TPOWER_PMI, &trans->status); - else - clear_bit(STATUS_TPOWER_PMI, &trans->status); -} - -static bool iwl_trans_pcie_grab_nic_access(struct iwl_trans *trans, - unsigned long *flags) -{ - int ret; - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - - spin_lock_irqsave(&trans_pcie->reg_lock, *flags); - - if (trans_pcie->cmd_hold_nic_awake) - goto out; - - /* this bit wakes up the NIC */ - __iwl_trans_pcie_set_bit(trans, CSR_GP_CNTRL, - CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); - if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000) - udelay(2); - - /* - * These bits say the device is running, and should keep running for - * at least a short while (at least as long as MAC_ACCESS_REQ stays 1), - * but they do not indicate that embedded SRAM is restored yet; - * 3945 and 4965 have volatile SRAM, and must save/restore contents - * to/from host DRAM when sleeping/waking for power-saving. - * Each direction takes approximately 1/4 millisecond; with this - * overhead, it's a good idea to grab and hold MAC_ACCESS_REQUEST if a - * series of register accesses are expected (e.g. reading Event Log), - * to keep device from sleeping. - * - * CSR_UCODE_DRV_GP1 register bit MAC_SLEEP == 0 indicates that - * SRAM is okay/restored. We don't check that here because this call - * is just for hardware register access; but GP1 MAC_SLEEP check is a - * good idea before accessing 3945/4965 SRAM (e.g. reading Event Log). - * - * 5000 series and later (including 1000 series) have non-volatile SRAM, - * and do not save/restore SRAM when power cycling. - */ - ret = iwl_poll_bit(trans, CSR_GP_CNTRL, - CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN, - (CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY | - CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 15000); - if (unlikely(ret < 0)) { - iwl_write32(trans, CSR_RESET, CSR_RESET_REG_FLAG_FORCE_NMI); - WARN_ONCE(1, - "Timeout waiting for hardware access (CSR_GP_CNTRL 0x%08x)\n", - iwl_read32(trans, CSR_GP_CNTRL)); - spin_unlock_irqrestore(&trans_pcie->reg_lock, *flags); - return false; - } - -out: - /* - * Fool sparse by faking we release the lock - sparse will - * track nic_access anyway. - */ - __release(&trans_pcie->reg_lock); - return true; -} - -static void iwl_trans_pcie_release_nic_access(struct iwl_trans *trans, - unsigned long *flags) -{ - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - - lockdep_assert_held(&trans_pcie->reg_lock); - - /* - * Fool sparse by faking we acquiring the lock - sparse will - * track nic_access anyway. - */ - __acquire(&trans_pcie->reg_lock); - - if (trans_pcie->cmd_hold_nic_awake) - goto out; - - __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL, - CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); - /* - * Above we read the CSR_GP_CNTRL register, which will flush - * any previous writes, but we need the write that clears the - * MAC_ACCESS_REQ bit to be performed before any other writes - * scheduled on different CPUs (after we drop reg_lock). - */ - mmiowb(); -out: - spin_unlock_irqrestore(&trans_pcie->reg_lock, *flags); -} - -static int iwl_trans_pcie_read_mem(struct iwl_trans *trans, u32 addr, - void *buf, int dwords) -{ - unsigned long flags; - int offs, ret = 0; - u32 *vals = buf; - - if (iwl_trans_grab_nic_access(trans, &flags)) { - iwl_write32(trans, HBUS_TARG_MEM_RADDR, addr); - for (offs = 0; offs < dwords; offs++) - vals[offs] = iwl_read32(trans, HBUS_TARG_MEM_RDAT); - iwl_trans_release_nic_access(trans, &flags); - } else { - ret = -EBUSY; - } - return ret; -} - -static int iwl_trans_pcie_write_mem(struct iwl_trans *trans, u32 addr, - const void *buf, int dwords) -{ - unsigned long flags; - int offs, ret = 0; - const u32 *vals = buf; - - if (iwl_trans_grab_nic_access(trans, &flags)) { - iwl_write32(trans, HBUS_TARG_MEM_WADDR, addr); - for (offs = 0; offs < dwords; offs++) - iwl_write32(trans, HBUS_TARG_MEM_WDAT, - vals ? vals[offs] : 0); - iwl_trans_release_nic_access(trans, &flags); - } else { - ret = -EBUSY; - } - return ret; -} - -static void iwl_trans_pcie_freeze_txq_timer(struct iwl_trans *trans, - unsigned long txqs, - bool freeze) -{ - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - int queue; - - for_each_set_bit(queue, &txqs, BITS_PER_LONG) { - struct iwl_txq *txq = &trans_pcie->txq[queue]; - unsigned long now; - - spin_lock_bh(&txq->lock); - - now = jiffies; - - if (txq->frozen == freeze) - goto next_queue; - - IWL_DEBUG_TX_QUEUES(trans, "%s TXQ %d\n", - freeze ? "Freezing" : "Waking", queue); - - txq->frozen = freeze; - - if (txq->q.read_ptr == txq->q.write_ptr) - goto next_queue; - - if (freeze) { - if (unlikely(time_after(now, - txq->stuck_timer.expires))) { - /* - * The timer should have fired, maybe it is - * spinning right now on the lock. - */ - goto next_queue; - } - /* remember how long until the timer fires */ - txq->frozen_expiry_remainder = - txq->stuck_timer.expires - now; - del_timer(&txq->stuck_timer); - goto next_queue; - } - - /* - * Wake a non-empty queue -> arm timer with the - * remainder before it froze - */ - mod_timer(&txq->stuck_timer, - now + txq->frozen_expiry_remainder); - -next_queue: - spin_unlock_bh(&txq->lock); - } -} - -static void iwl_trans_pcie_block_txq_ptrs(struct iwl_trans *trans, bool block) -{ - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - int i; - - for (i = 0; i < trans->cfg->base_params->num_of_queues; i++) { - struct iwl_txq *txq = &trans_pcie->txq[i]; - - if (i == trans_pcie->cmd_queue) - continue; - - spin_lock_bh(&txq->lock); - - if (!block && !(WARN_ON_ONCE(!txq->block))) { - txq->block--; - if (!txq->block) { - iwl_write32(trans, HBUS_TARG_WRPTR, - txq->q.write_ptr | (i << 8)); - } - } else if (block) { - txq->block++; - } - - spin_unlock_bh(&txq->lock); - } -} - -#define IWL_FLUSH_WAIT_MS 2000 - -static int iwl_trans_pcie_wait_txq_empty(struct iwl_trans *trans, u32 txq_bm) -{ - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - struct iwl_txq *txq; - struct iwl_queue *q; - int cnt; - unsigned long now = jiffies; - u32 scd_sram_addr; - u8 buf[16]; - int ret = 0; - - /* waiting for all the tx frames complete might take a while */ - for (cnt = 0; cnt < trans->cfg->base_params->num_of_queues; cnt++) { - u8 wr_ptr; - - if (cnt == trans_pcie->cmd_queue) - continue; - if (!test_bit(cnt, trans_pcie->queue_used)) - continue; - if (!(BIT(cnt) & txq_bm)) - continue; - - IWL_DEBUG_TX_QUEUES(trans, "Emptying queue %d...\n", cnt); - txq = &trans_pcie->txq[cnt]; - q = &txq->q; - wr_ptr = ACCESS_ONCE(q->write_ptr); - - while (q->read_ptr != ACCESS_ONCE(q->write_ptr) && - !time_after(jiffies, - now + msecs_to_jiffies(IWL_FLUSH_WAIT_MS))) { - u8 write_ptr = ACCESS_ONCE(q->write_ptr); - - if (WARN_ONCE(wr_ptr != write_ptr, - "WR pointer moved while flushing %d -> %d\n", - wr_ptr, write_ptr)) - return -ETIMEDOUT; - msleep(1); - } - - if (q->read_ptr != q->write_ptr) { - IWL_ERR(trans, - "fail to flush all tx fifo queues Q %d\n", cnt); - ret = -ETIMEDOUT; - break; - } - IWL_DEBUG_TX_QUEUES(trans, "Queue %d is now empty.\n", cnt); - } - - if (!ret) - return 0; - - IWL_ERR(trans, "Current SW read_ptr %d write_ptr %d\n", - txq->q.read_ptr, txq->q.write_ptr); - - scd_sram_addr = trans_pcie->scd_base_addr + - SCD_TX_STTS_QUEUE_OFFSET(txq->q.id); - iwl_trans_read_mem_bytes(trans, scd_sram_addr, buf, sizeof(buf)); - - iwl_print_hex_error(trans, buf, sizeof(buf)); - - for (cnt = 0; cnt < FH_TCSR_CHNL_NUM; cnt++) - IWL_ERR(trans, "FH TRBs(%d) = 0x%08x\n", cnt, - iwl_read_direct32(trans, FH_TX_TRB_REG(cnt))); - - for (cnt = 0; cnt < trans->cfg->base_params->num_of_queues; cnt++) { - u32 status = iwl_read_prph(trans, SCD_QUEUE_STATUS_BITS(cnt)); - u8 fifo = (status >> SCD_QUEUE_STTS_REG_POS_TXF) & 0x7; - bool active = !!(status & BIT(SCD_QUEUE_STTS_REG_POS_ACTIVE)); - u32 tbl_dw = - iwl_trans_read_mem32(trans, trans_pcie->scd_base_addr + - SCD_TRANS_TBL_OFFSET_QUEUE(cnt)); - - if (cnt & 0x1) - tbl_dw = (tbl_dw & 0xFFFF0000) >> 16; - else - tbl_dw = tbl_dw & 0x0000FFFF; - - IWL_ERR(trans, - "Q %d is %sactive and mapped to fifo %d ra_tid 0x%04x [%d,%d]\n", - cnt, active ? "" : "in", fifo, tbl_dw, - iwl_read_prph(trans, SCD_QUEUE_RDPTR(cnt)) & - (TFD_QUEUE_SIZE_MAX - 1), - iwl_read_prph(trans, SCD_QUEUE_WRPTR(cnt))); - } - - return ret; -} - -static void iwl_trans_pcie_set_bits_mask(struct iwl_trans *trans, u32 reg, - u32 mask, u32 value) -{ - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - unsigned long flags; - - spin_lock_irqsave(&trans_pcie->reg_lock, flags); - __iwl_trans_pcie_set_bits_mask(trans, reg, mask, value); - spin_unlock_irqrestore(&trans_pcie->reg_lock, flags); -} - -void iwl_trans_pcie_ref(struct iwl_trans *trans) -{ - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - unsigned long flags; - - if (iwlwifi_mod_params.d0i3_disable) - return; - - spin_lock_irqsave(&trans_pcie->ref_lock, flags); - IWL_DEBUG_RPM(trans, "ref_counter: %d\n", trans_pcie->ref_count); - trans_pcie->ref_count++; - spin_unlock_irqrestore(&trans_pcie->ref_lock, flags); -} - -void iwl_trans_pcie_unref(struct iwl_trans *trans) -{ - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - unsigned long flags; - - if (iwlwifi_mod_params.d0i3_disable) - return; - - spin_lock_irqsave(&trans_pcie->ref_lock, flags); - IWL_DEBUG_RPM(trans, "ref_counter: %d\n", trans_pcie->ref_count); - if (WARN_ON_ONCE(trans_pcie->ref_count == 0)) { - spin_unlock_irqrestore(&trans_pcie->ref_lock, flags); - return; - } - trans_pcie->ref_count--; - spin_unlock_irqrestore(&trans_pcie->ref_lock, flags); -} - -static const char *get_csr_string(int cmd) -{ -#define IWL_CMD(x) case x: return #x - switch (cmd) { - IWL_CMD(CSR_HW_IF_CONFIG_REG); - IWL_CMD(CSR_INT_COALESCING); - IWL_CMD(CSR_INT); - IWL_CMD(CSR_INT_MASK); - IWL_CMD(CSR_FH_INT_STATUS); - IWL_CMD(CSR_GPIO_IN); - IWL_CMD(CSR_RESET); - IWL_CMD(CSR_GP_CNTRL); - IWL_CMD(CSR_HW_REV); - IWL_CMD(CSR_EEPROM_REG); - IWL_CMD(CSR_EEPROM_GP); - IWL_CMD(CSR_OTP_GP_REG); - IWL_CMD(CSR_GIO_REG); - IWL_CMD(CSR_GP_UCODE_REG); - IWL_CMD(CSR_GP_DRIVER_REG); - IWL_CMD(CSR_UCODE_DRV_GP1); - IWL_CMD(CSR_UCODE_DRV_GP2); - IWL_CMD(CSR_LED_REG); - IWL_CMD(CSR_DRAM_INT_TBL_REG); - IWL_CMD(CSR_GIO_CHICKEN_BITS); - IWL_CMD(CSR_ANA_PLL_CFG); - IWL_CMD(CSR_HW_REV_WA_REG); - IWL_CMD(CSR_MONITOR_STATUS_REG); - IWL_CMD(CSR_DBG_HPET_MEM_REG); - default: - return "UNKNOWN"; - } -#undef IWL_CMD -} - -void iwl_pcie_dump_csr(struct iwl_trans *trans) -{ - int i; - static const u32 csr_tbl[] = { - CSR_HW_IF_CONFIG_REG, - CSR_INT_COALESCING, - CSR_INT, - CSR_INT_MASK, - CSR_FH_INT_STATUS, - CSR_GPIO_IN, - CSR_RESET, - CSR_GP_CNTRL, - CSR_HW_REV, - CSR_EEPROM_REG, - CSR_EEPROM_GP, - CSR_OTP_GP_REG, - CSR_GIO_REG, - CSR_GP_UCODE_REG, - CSR_GP_DRIVER_REG, - CSR_UCODE_DRV_GP1, - CSR_UCODE_DRV_GP2, - CSR_LED_REG, - CSR_DRAM_INT_TBL_REG, - CSR_GIO_CHICKEN_BITS, - CSR_ANA_PLL_CFG, - CSR_MONITOR_STATUS_REG, - CSR_HW_REV_WA_REG, - CSR_DBG_HPET_MEM_REG - }; - IWL_ERR(trans, "CSR values:\n"); - IWL_ERR(trans, "(2nd byte of CSR_INT_COALESCING is " - "CSR_INT_PERIODIC_REG)\n"); - for (i = 0; i < ARRAY_SIZE(csr_tbl); i++) { - IWL_ERR(trans, " %25s: 0X%08x\n", - get_csr_string(csr_tbl[i]), - iwl_read32(trans, csr_tbl[i])); - } -} - -#ifdef CONFIG_IWLWIFI_DEBUGFS -/* create and remove of files */ -#define DEBUGFS_ADD_FILE(name, parent, mode) do { \ - if (!debugfs_create_file(#name, mode, parent, trans, \ - &iwl_dbgfs_##name##_ops)) \ - goto err; \ -} while (0) - -/* file operation */ -#define DEBUGFS_READ_FILE_OPS(name) \ -static const struct file_operations iwl_dbgfs_##name##_ops = { \ - .read = iwl_dbgfs_##name##_read, \ - .open = simple_open, \ - .llseek = generic_file_llseek, \ -}; - -#define DEBUGFS_WRITE_FILE_OPS(name) \ -static const struct file_operations iwl_dbgfs_##name##_ops = { \ - .write = iwl_dbgfs_##name##_write, \ - .open = simple_open, \ - .llseek = generic_file_llseek, \ -}; - -#define DEBUGFS_READ_WRITE_FILE_OPS(name) \ -static const struct file_operations iwl_dbgfs_##name##_ops = { \ - .write = iwl_dbgfs_##name##_write, \ - .read = iwl_dbgfs_##name##_read, \ - .open = simple_open, \ - .llseek = generic_file_llseek, \ -}; - -static ssize_t iwl_dbgfs_tx_queue_read(struct file *file, - char __user *user_buf, - size_t count, loff_t *ppos) -{ - struct iwl_trans *trans = file->private_data; - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - struct iwl_txq *txq; - struct iwl_queue *q; - char *buf; - int pos = 0; - int cnt; - int ret; - size_t bufsz; - - bufsz = sizeof(char) * 75 * trans->cfg->base_params->num_of_queues; - - if (!trans_pcie->txq) - return -EAGAIN; - - buf = kzalloc(bufsz, GFP_KERNEL); - if (!buf) - return -ENOMEM; - - for (cnt = 0; cnt < trans->cfg->base_params->num_of_queues; cnt++) { - txq = &trans_pcie->txq[cnt]; - q = &txq->q; - pos += scnprintf(buf + pos, bufsz - pos, - "hwq %.2d: read=%u write=%u use=%d stop=%d need_update=%d frozen=%d%s\n", - cnt, q->read_ptr, q->write_ptr, - !!test_bit(cnt, trans_pcie->queue_used), - !!test_bit(cnt, trans_pcie->queue_stopped), - txq->need_update, txq->frozen, - (cnt == trans_pcie->cmd_queue ? " HCMD" : "")); - } - ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos); - kfree(buf); - return ret; -} - -static ssize_t iwl_dbgfs_rx_queue_read(struct file *file, - char __user *user_buf, - size_t count, loff_t *ppos) -{ - struct iwl_trans *trans = file->private_data; - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - struct iwl_rxq *rxq = &trans_pcie->rxq; - char buf[256]; - int pos = 0; - const size_t bufsz = sizeof(buf); - - pos += scnprintf(buf + pos, bufsz - pos, "read: %u\n", - rxq->read); - pos += scnprintf(buf + pos, bufsz - pos, "write: %u\n", - rxq->write); - pos += scnprintf(buf + pos, bufsz - pos, "write_actual: %u\n", - rxq->write_actual); - pos += scnprintf(buf + pos, bufsz - pos, "need_update: %d\n", - rxq->need_update); - pos += scnprintf(buf + pos, bufsz - pos, "free_count: %u\n", - rxq->free_count); - if (rxq->rb_stts) { - pos += scnprintf(buf + pos, bufsz - pos, "closed_rb_num: %u\n", - le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF); - } else { - pos += scnprintf(buf + pos, bufsz - pos, - "closed_rb_num: Not Allocated\n"); - } - return simple_read_from_buffer(user_buf, count, ppos, buf, pos); -} - -static ssize_t iwl_dbgfs_interrupt_read(struct file *file, - char __user *user_buf, - size_t count, loff_t *ppos) -{ - struct iwl_trans *trans = file->private_data; - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - struct isr_statistics *isr_stats = &trans_pcie->isr_stats; - - int pos = 0; - char *buf; - int bufsz = 24 * 64; /* 24 items * 64 char per item */ - ssize_t ret; - - buf = kzalloc(bufsz, GFP_KERNEL); - if (!buf) - return -ENOMEM; - - pos += scnprintf(buf + pos, bufsz - pos, - "Interrupt Statistics Report:\n"); - - pos += scnprintf(buf + pos, bufsz - pos, "HW Error:\t\t\t %u\n", - isr_stats->hw); - pos += scnprintf(buf + pos, bufsz - pos, "SW Error:\t\t\t %u\n", - isr_stats->sw); - if (isr_stats->sw || isr_stats->hw) { - pos += scnprintf(buf + pos, bufsz - pos, - "\tLast Restarting Code: 0x%X\n", - isr_stats->err_code); - } -#ifdef CONFIG_IWLWIFI_DEBUG - pos += scnprintf(buf + pos, bufsz - pos, "Frame transmitted:\t\t %u\n", - isr_stats->sch); - pos += scnprintf(buf + pos, bufsz - pos, "Alive interrupt:\t\t %u\n", - isr_stats->alive); -#endif - pos += scnprintf(buf + pos, bufsz - pos, - "HW RF KILL switch toggled:\t %u\n", isr_stats->rfkill); - - pos += scnprintf(buf + pos, bufsz - pos, "CT KILL:\t\t\t %u\n", - isr_stats->ctkill); - - pos += scnprintf(buf + pos, bufsz - pos, "Wakeup Interrupt:\t\t %u\n", - isr_stats->wakeup); - - pos += scnprintf(buf + pos, bufsz - pos, - "Rx command responses:\t\t %u\n", isr_stats->rx); - - pos += scnprintf(buf + pos, bufsz - pos, "Tx/FH interrupt:\t\t %u\n", - isr_stats->tx); - - pos += scnprintf(buf + pos, bufsz - pos, "Unexpected INTA:\t\t %u\n", - isr_stats->unhandled); - - ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos); - kfree(buf); - return ret; -} - -static ssize_t iwl_dbgfs_interrupt_write(struct file *file, - const char __user *user_buf, - size_t count, loff_t *ppos) -{ - struct iwl_trans *trans = file->private_data; - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - struct isr_statistics *isr_stats = &trans_pcie->isr_stats; - - char buf[8]; - int buf_size; - u32 reset_flag; - - memset(buf, 0, sizeof(buf)); - buf_size = min(count, sizeof(buf) - 1); - if (copy_from_user(buf, user_buf, buf_size)) - return -EFAULT; - if (sscanf(buf, "%x", &reset_flag) != 1) - return -EFAULT; - if (reset_flag == 0) - memset(isr_stats, 0, sizeof(*isr_stats)); - - return count; -} - -static ssize_t iwl_dbgfs_csr_write(struct file *file, - const char __user *user_buf, - size_t count, loff_t *ppos) -{ - struct iwl_trans *trans = file->private_data; - char buf[8]; - int buf_size; - int csr; - - memset(buf, 0, sizeof(buf)); - buf_size = min(count, sizeof(buf) - 1); - if (copy_from_user(buf, user_buf, buf_size)) - return -EFAULT; - if (sscanf(buf, "%d", &csr) != 1) - return -EFAULT; - - iwl_pcie_dump_csr(trans); - - return count; -} - -static ssize_t iwl_dbgfs_fh_reg_read(struct file *file, - char __user *user_buf, - size_t count, loff_t *ppos) -{ - struct iwl_trans *trans = file->private_data; - char *buf = NULL; - ssize_t ret; - - ret = iwl_dump_fh(trans, &buf); - if (ret < 0) - return ret; - if (!buf) - return -EINVAL; - ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret); - kfree(buf); - return ret; -} - -DEBUGFS_READ_WRITE_FILE_OPS(interrupt); -DEBUGFS_READ_FILE_OPS(fh_reg); -DEBUGFS_READ_FILE_OPS(rx_queue); -DEBUGFS_READ_FILE_OPS(tx_queue); -DEBUGFS_WRITE_FILE_OPS(csr); - -/* Create the debugfs files and directories */ -int iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans) -{ - struct dentry *dir = trans->dbgfs_dir; - - DEBUGFS_ADD_FILE(rx_queue, dir, S_IRUSR); - DEBUGFS_ADD_FILE(tx_queue, dir, S_IRUSR); - DEBUGFS_ADD_FILE(interrupt, dir, S_IWUSR | S_IRUSR); - DEBUGFS_ADD_FILE(csr, dir, S_IWUSR); - DEBUGFS_ADD_FILE(fh_reg, dir, S_IRUSR); - return 0; - -err: - IWL_ERR(trans, "failed to create the trans debugfs entry\n"); - return -ENOMEM; -} -#endif /*CONFIG_IWLWIFI_DEBUGFS */ - -static u32 iwl_trans_pcie_get_cmdlen(struct iwl_tfd *tfd) -{ - u32 cmdlen = 0; - int i; - - for (i = 0; i < IWL_NUM_OF_TBS; i++) - cmdlen += iwl_pcie_tfd_tb_get_len(tfd, i); - - return cmdlen; -} - -static u32 iwl_trans_pcie_dump_rbs(struct iwl_trans *trans, - struct iwl_fw_error_dump_data **data, - int allocated_rb_nums) -{ - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - int max_len = PAGE_SIZE << trans_pcie->rx_page_order; - struct iwl_rxq *rxq = &trans_pcie->rxq; - u32 i, r, j, rb_len = 0; - - spin_lock(&rxq->lock); - - r = le16_to_cpu(ACCESS_ONCE(rxq->rb_stts->closed_rb_num)) & 0x0FFF; - - for (i = rxq->read, j = 0; - i != r && j < allocated_rb_nums; - i = (i + 1) & RX_QUEUE_MASK, j++) { - struct iwl_rx_mem_buffer *rxb = rxq->queue[i]; - struct iwl_fw_error_dump_rb *rb; - - dma_unmap_page(trans->dev, rxb->page_dma, max_len, - DMA_FROM_DEVICE); - - rb_len += sizeof(**data) + sizeof(*rb) + max_len; - - (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RB); - (*data)->len = cpu_to_le32(sizeof(*rb) + max_len); - rb = (void *)(*data)->data; - rb->index = cpu_to_le32(i); - memcpy(rb->data, page_address(rxb->page), max_len); - /* remap the page for the free benefit */ - rxb->page_dma = dma_map_page(trans->dev, rxb->page, 0, - max_len, - DMA_FROM_DEVICE); - - *data = iwl_fw_error_next_data(*data); - } - - spin_unlock(&rxq->lock); - - return rb_len; -} -#define IWL_CSR_TO_DUMP (0x250) - -static u32 iwl_trans_pcie_dump_csr(struct iwl_trans *trans, - struct iwl_fw_error_dump_data **data) -{ - u32 csr_len = sizeof(**data) + IWL_CSR_TO_DUMP; - __le32 *val; - int i; - - (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_CSR); - (*data)->len = cpu_to_le32(IWL_CSR_TO_DUMP); - val = (void *)(*data)->data; - - for (i = 0; i < IWL_CSR_TO_DUMP; i += 4) - *val++ = cpu_to_le32(iwl_trans_pcie_read32(trans, i)); - - *data = iwl_fw_error_next_data(*data); - - return csr_len; -} - -static u32 iwl_trans_pcie_fh_regs_dump(struct iwl_trans *trans, - struct iwl_fw_error_dump_data **data) -{ - u32 fh_regs_len = FH_MEM_UPPER_BOUND - FH_MEM_LOWER_BOUND; - unsigned long flags; - __le32 *val; - int i; - - if (!iwl_trans_grab_nic_access(trans, &flags)) - return 0; - - (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_FH_REGS); - (*data)->len = cpu_to_le32(fh_regs_len); - val = (void *)(*data)->data; - - for (i = FH_MEM_LOWER_BOUND; i < FH_MEM_UPPER_BOUND; i += sizeof(u32)) - *val++ = cpu_to_le32(iwl_trans_pcie_read32(trans, i)); - - iwl_trans_release_nic_access(trans, &flags); - - *data = iwl_fw_error_next_data(*data); - - return sizeof(**data) + fh_regs_len; -} - -static u32 -iwl_trans_pci_dump_marbh_monitor(struct iwl_trans *trans, - struct iwl_fw_error_dump_fw_mon *fw_mon_data, - u32 monitor_len) -{ - u32 buf_size_in_dwords = (monitor_len >> 2); - u32 *buffer = (u32 *)fw_mon_data->data; - unsigned long flags; - u32 i; - - if (!iwl_trans_grab_nic_access(trans, &flags)) - return 0; - - iwl_write_prph_no_grab(trans, MON_DMARB_RD_CTL_ADDR, 0x1); - for (i = 0; i < buf_size_in_dwords; i++) - buffer[i] = iwl_read_prph_no_grab(trans, - MON_DMARB_RD_DATA_ADDR); - iwl_write_prph_no_grab(trans, MON_DMARB_RD_CTL_ADDR, 0x0); - - iwl_trans_release_nic_access(trans, &flags); - - return monitor_len; -} - -static u32 -iwl_trans_pcie_dump_monitor(struct iwl_trans *trans, - struct iwl_fw_error_dump_data **data, - u32 monitor_len) -{ - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - u32 len = 0; - - if ((trans_pcie->fw_mon_page && - trans->cfg->device_family == IWL_DEVICE_FAMILY_7000) || - trans->dbg_dest_tlv) { - struct iwl_fw_error_dump_fw_mon *fw_mon_data; - u32 base, write_ptr, wrap_cnt; - - /* If there was a dest TLV - use the values from there */ - if (trans->dbg_dest_tlv) { - write_ptr = - le32_to_cpu(trans->dbg_dest_tlv->write_ptr_reg); - wrap_cnt = le32_to_cpu(trans->dbg_dest_tlv->wrap_count); - base = le32_to_cpu(trans->dbg_dest_tlv->base_reg); - } else { - base = MON_BUFF_BASE_ADDR; - write_ptr = MON_BUFF_WRPTR; - wrap_cnt = MON_BUFF_CYCLE_CNT; - } - - (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_FW_MONITOR); - fw_mon_data = (void *)(*data)->data; - fw_mon_data->fw_mon_wr_ptr = - cpu_to_le32(iwl_read_prph(trans, write_ptr)); - fw_mon_data->fw_mon_cycle_cnt = - cpu_to_le32(iwl_read_prph(trans, wrap_cnt)); - fw_mon_data->fw_mon_base_ptr = - cpu_to_le32(iwl_read_prph(trans, base)); - - len += sizeof(**data) + sizeof(*fw_mon_data); - if (trans_pcie->fw_mon_page) { - /* - * The firmware is now asserted, it won't write anything - * to the buffer. CPU can take ownership to fetch the - * data. The buffer will be handed back to the device - * before the firmware will be restarted. - */ - dma_sync_single_for_cpu(trans->dev, - trans_pcie->fw_mon_phys, - trans_pcie->fw_mon_size, - DMA_FROM_DEVICE); - memcpy(fw_mon_data->data, - page_address(trans_pcie->fw_mon_page), - trans_pcie->fw_mon_size); - - monitor_len = trans_pcie->fw_mon_size; - } else if (trans->dbg_dest_tlv->monitor_mode == SMEM_MODE) { - /* - * Update pointers to reflect actual values after - * shifting - */ - base = iwl_read_prph(trans, base) << - trans->dbg_dest_tlv->base_shift; - iwl_trans_read_mem(trans, base, fw_mon_data->data, - monitor_len / sizeof(u32)); - } else if (trans->dbg_dest_tlv->monitor_mode == MARBH_MODE) { - monitor_len = - iwl_trans_pci_dump_marbh_monitor(trans, - fw_mon_data, - monitor_len); - } else { - /* Didn't match anything - output no monitor data */ - monitor_len = 0; - } - - len += monitor_len; - (*data)->len = cpu_to_le32(monitor_len + sizeof(*fw_mon_data)); - } - - return len; -} - -static struct iwl_trans_dump_data -*iwl_trans_pcie_dump_data(struct iwl_trans *trans, - const struct iwl_fw_dbg_trigger_tlv *trigger) -{ - struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - struct iwl_fw_error_dump_data *data; - struct iwl_txq *cmdq = &trans_pcie->txq[trans_pcie->cmd_queue]; - struct iwl_fw_error_dump_txcmd *txcmd; - struct iwl_trans_dump_data *dump_data; - u32 len, num_rbs; - u32 monitor_len; - int i, ptr; - bool dump_rbs = test_bit(STATUS_FW_ERROR, &trans->status); - - /* transport dump header */ - len = sizeof(*dump_data); - - /* host commands */ - len += sizeof(*data) + - cmdq->q.n_window * (sizeof(*txcmd) + TFD_MAX_PAYLOAD_SIZE); - - /* FW monitor */ - if (trans_pcie->fw_mon_page) { - len += sizeof(*data) + sizeof(struct iwl_fw_error_dump_fw_mon) + - trans_pcie->fw_mon_size; - monitor_len = trans_pcie->fw_mon_size; - } else if (trans->dbg_dest_tlv) { - u32 base, end; - - base = le32_to_cpu(trans->dbg_dest_tlv->base_reg); - end = le32_to_cpu(trans->dbg_dest_tlv->end_reg); - - base = iwl_read_prph(trans, base) << - trans->dbg_dest_tlv->base_shift; - end = iwl_read_prph(trans, end) << - trans->dbg_dest_tlv->end_shift; - - /* Make "end" point to the actual end */ - if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000 || - trans->dbg_dest_tlv->monitor_mode == MARBH_MODE) - end += (1 << trans->dbg_dest_tlv->end_shift); - monitor_len = end - base; - len += sizeof(*data) + sizeof(struct iwl_fw_error_dump_fw_mon) + - monitor_len; - } else { - monitor_len = 0; - } - - if (trigger && (trigger->mode & IWL_FW_DBG_TRIGGER_MONITOR_ONLY)) { - dump_data = vzalloc(len); - if (!dump_data) - return NULL; - - data = (void *)dump_data->data; - len = iwl_trans_pcie_dump_monitor(trans, &data, monitor_len); - dump_data->len = len; - - return dump_data; - } - - /* CSR registers */ - len += sizeof(*data) + IWL_CSR_TO_DUMP; - - /* FH registers */ - len += sizeof(*data) + (FH_MEM_UPPER_BOUND - FH_MEM_LOWER_BOUND); - - if (dump_rbs) { - /* RBs */ - num_rbs = le16_to_cpu(ACCESS_ONCE( - trans_pcie->rxq.rb_stts->closed_rb_num)) - & 0x0FFF; - num_rbs = (num_rbs - trans_pcie->rxq.read) & RX_QUEUE_MASK; - len += num_rbs * (sizeof(*data) + - sizeof(struct iwl_fw_error_dump_rb) + - (PAGE_SIZE << trans_pcie->rx_page_order)); - } - - dump_data = vzalloc(len); - if (!dump_data) - return NULL; - - len = 0; - data = (void *)dump_data->data; - data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_TXCMD); - txcmd = (void *)data->data; - spin_lock_bh(&cmdq->lock); - ptr = cmdq->q.write_ptr; - for (i = 0; i < cmdq->q.n_window; i++) { - u8 idx = get_cmd_index(&cmdq->q, ptr); - u32 caplen, cmdlen; - - cmdlen = iwl_trans_pcie_get_cmdlen(&cmdq->tfds[ptr]); - caplen = min_t(u32, TFD_MAX_PAYLOAD_SIZE, cmdlen); - - if (cmdlen) { - len += sizeof(*txcmd) + caplen; - txcmd->cmdlen = cpu_to_le32(cmdlen); - txcmd->caplen = cpu_to_le32(caplen); - memcpy(txcmd->data, cmdq->entries[idx].cmd, caplen); - txcmd = (void *)((u8 *)txcmd->data + caplen); - } - - ptr = iwl_queue_dec_wrap(ptr); - } - spin_unlock_bh(&cmdq->lock); - - data->len = cpu_to_le32(len); - len += sizeof(*data); - data = iwl_fw_error_next_data(data); - - len += iwl_trans_pcie_dump_csr(trans, &data); - len += iwl_trans_pcie_fh_regs_dump(trans, &data); - if (dump_rbs) - len += iwl_trans_pcie_dump_rbs(trans, &data, num_rbs); - - len += iwl_trans_pcie_dump_monitor(trans, &data, monitor_len); - - dump_data->len = len; - - return dump_data; -} - -static const struct iwl_trans_ops trans_ops_pcie = { - .start_hw = iwl_trans_pcie_start_hw, - .op_mode_leave = iwl_trans_pcie_op_mode_leave, - .fw_alive = iwl_trans_pcie_fw_alive, - .start_fw = iwl_trans_pcie_start_fw, - .stop_device = iwl_trans_pcie_stop_device, - - .d3_suspend = iwl_trans_pcie_d3_suspend, - .d3_resume = iwl_trans_pcie_d3_resume, - - .send_cmd = iwl_trans_pcie_send_hcmd, - - .tx = iwl_trans_pcie_tx, - .reclaim = iwl_trans_pcie_reclaim, - - .txq_disable = iwl_trans_pcie_txq_disable, - .txq_enable = iwl_trans_pcie_txq_enable, - - .wait_tx_queue_empty = iwl_trans_pcie_wait_txq_empty, - .freeze_txq_timer = iwl_trans_pcie_freeze_txq_timer, - .block_txq_ptrs = iwl_trans_pcie_block_txq_ptrs, - - .write8 = iwl_trans_pcie_write8, - .write32 = iwl_trans_pcie_write32, - .read32 = iwl_trans_pcie_read32, - .read_prph = iwl_trans_pcie_read_prph, - .write_prph = iwl_trans_pcie_write_prph, - .read_mem = iwl_trans_pcie_read_mem, - .write_mem = iwl_trans_pcie_write_mem, - .configure = iwl_trans_pcie_configure, - .set_pmi = iwl_trans_pcie_set_pmi, - .grab_nic_access = iwl_trans_pcie_grab_nic_access, - .release_nic_access = iwl_trans_pcie_release_nic_access, - .set_bits_mask = iwl_trans_pcie_set_bits_mask, - - .ref = iwl_trans_pcie_ref, - .unref = iwl_trans_pcie_unref, - - .dump_data = iwl_trans_pcie_dump_data, -}; - -struct iwl_trans *iwl_trans_pcie_alloc(struct pci_dev *pdev, - const struct pci_device_id *ent, - const struct iwl_cfg *cfg) -{ - struct iwl_trans_pcie *trans_pcie; - struct iwl_trans *trans; - u16 pci_cmd; - int ret; - - trans = iwl_trans_alloc(sizeof(struct iwl_trans_pcie), - &pdev->dev, cfg, &trans_ops_pcie, 0); - if (!trans) - return ERR_PTR(-ENOMEM); - - trans->max_skb_frags = IWL_PCIE_MAX_FRAGS; - - trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - - trans_pcie->trans = trans; - spin_lock_init(&trans_pcie->irq_lock); - spin_lock_init(&trans_pcie->reg_lock); - spin_lock_init(&trans_pcie->ref_lock); - mutex_init(&trans_pcie->mutex); - init_waitqueue_head(&trans_pcie->ucode_write_waitq); - trans_pcie->tso_hdr_page = alloc_percpu(struct iwl_tso_hdr_page); - if (!trans_pcie->tso_hdr_page) { - ret = -ENOMEM; - goto out_no_pci; - } - - ret = pci_enable_device(pdev); - if (ret) - goto out_no_pci; - - if (!cfg->base_params->pcie_l1_allowed) { - /* - * W/A - seems to solve weird behavior. We need to remove this - * if we don't want to stay in L1 all the time. This wastes a - * lot of power. - */ - pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S | - PCIE_LINK_STATE_L1 | - PCIE_LINK_STATE_CLKPM); - } - - pci_set_master(pdev); - - ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(36)); - if (!ret) - ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36)); - if (ret) { - ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); - if (!ret) - ret = pci_set_consistent_dma_mask(pdev, - DMA_BIT_MASK(32)); - /* both attempts failed: */ - if (ret) { - dev_err(&pdev->dev, "No suitable DMA available\n"); - goto out_pci_disable_device; - } - } - - ret = pci_request_regions(pdev, DRV_NAME); - if (ret) { - dev_err(&pdev->dev, "pci_request_regions failed\n"); - goto out_pci_disable_device; - } - - trans_pcie->hw_base = pci_ioremap_bar(pdev, 0); - if (!trans_pcie->hw_base) { - dev_err(&pdev->dev, "pci_ioremap_bar failed\n"); - ret = -ENODEV; - goto out_pci_release_regions; - } - - /* We disable the RETRY_TIMEOUT register (0x41) to keep - * PCI Tx retries from interfering with C3 CPU state */ - pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00); - - trans->dev = &pdev->dev; - trans_pcie->pci_dev = pdev; - iwl_disable_interrupts(trans); - - ret = pci_enable_msi(pdev); - if (ret) { - dev_err(&pdev->dev, "pci_enable_msi failed(0X%x)\n", ret); - /* enable rfkill interrupt: hw bug w/a */ - pci_read_config_word(pdev, PCI_COMMAND, &pci_cmd); - if (pci_cmd & PCI_COMMAND_INTX_DISABLE) { - pci_cmd &= ~PCI_COMMAND_INTX_DISABLE; - pci_write_config_word(pdev, PCI_COMMAND, pci_cmd); - } - } - - trans->hw_rev = iwl_read32(trans, CSR_HW_REV); - /* - * In the 8000 HW family the format of the 4 bytes of CSR_HW_REV have - * changed, and now the revision step also includes bit 0-1 (no more - * "dash" value). To keep hw_rev backwards compatible - we'll store it - * in the old format. - */ - if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000) { - unsigned long flags; - - trans->hw_rev = (trans->hw_rev & 0xfff0) | - (CSR_HW_REV_STEP(trans->hw_rev << 2) << 2); - - ret = iwl_pcie_prepare_card_hw(trans); - if (ret) { - IWL_WARN(trans, "Exit HW not ready\n"); - goto out_pci_disable_msi; - } - - /* - * in-order to recognize C step driver should read chip version - * id located at the AUX bus MISC address space. - */ - iwl_set_bit(trans, CSR_GP_CNTRL, - CSR_GP_CNTRL_REG_FLAG_INIT_DONE); - udelay(2); - - ret = iwl_poll_bit(trans, CSR_GP_CNTRL, - CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, - CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, - 25000); - if (ret < 0) { - IWL_DEBUG_INFO(trans, "Failed to wake up the nic\n"); - goto out_pci_disable_msi; - } - - if (iwl_trans_grab_nic_access(trans, &flags)) { - u32 hw_step; - - hw_step = iwl_read_prph_no_grab(trans, WFPM_CTRL_REG); - hw_step |= ENABLE_WFPM; - iwl_write_prph_no_grab(trans, WFPM_CTRL_REG, hw_step); - hw_step = iwl_read_prph_no_grab(trans, AUX_MISC_REG); - hw_step = (hw_step >> HW_STEP_LOCATION_BITS) & 0xF; - if (hw_step == 0x3) - trans->hw_rev = (trans->hw_rev & 0xFFFFFFF3) | - (SILICON_C_STEP << 2); - iwl_trans_release_nic_access(trans, &flags); - } - } - - trans->hw_id = (pdev->device << 16) + pdev->subsystem_device; - snprintf(trans->hw_id_str, sizeof(trans->hw_id_str), - "PCI ID: 0x%04X:0x%04X", pdev->device, pdev->subsystem_device); - - /* Initialize the wait queue for commands */ - init_waitqueue_head(&trans_pcie->wait_command_queue); - - ret = iwl_pcie_alloc_ict(trans); - if (ret) - goto out_pci_disable_msi; - - ret = request_threaded_irq(pdev->irq, iwl_pcie_isr, - iwl_pcie_irq_handler, - IRQF_SHARED, DRV_NAME, trans); - if (ret) { - IWL_ERR(trans, "Error allocating IRQ %d\n", pdev->irq); - goto out_free_ict; - } - - trans_pcie->inta_mask = CSR_INI_SET_MASK; - - return trans; - -out_free_ict: - iwl_pcie_free_ict(trans); -out_pci_disable_msi: - pci_disable_msi(pdev); -out_pci_release_regions: - pci_release_regions(pdev); -out_pci_disable_device: - pci_disable_device(pdev); -out_no_pci: - free_percpu(trans_pcie->tso_hdr_page); - iwl_trans_free(trans); - return ERR_PTR(ret); -} |