| /****************************************************************************** |
| * |
| * 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 - 2013 Intel Corporation. All rights reserved. |
| * |
| * 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 LICENSE.GPL. |
| * |
| * Contact Information: |
| * Intel Linux Wireless <ilw@linux.intel.com> |
| * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| * |
| * BSD LICENSE |
| * |
| * Copyright(c) 2005 - 2013 Intel Corporation. All rights reserved. |
| * 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 "iwl-drv.h" |
| #include "iwl-trans.h" |
| #include "iwl-csr.h" |
| #include "iwl-prph.h" |
| #include "iwl-agn-hw.h" |
| #include "internal.h" |
| |
| static void __iwl_trans_pcie_set_bits_mask(struct iwl_trans *trans, |
| u32 reg, u32 mask, u32 value) |
| { |
| u32 v; |
| |
| #ifdef CONFIG_IWLWIFI_DEBUG |
| WARN_ON_ONCE(value & ~mask); |
| #endif |
| |
| v = iwl_read32(trans, reg); |
| v &= ~mask; |
| v |= value; |
| iwl_write32(trans, reg, v); |
| } |
| |
| static inline void __iwl_trans_pcie_clear_bit(struct iwl_trans *trans, |
| u32 reg, u32 mask) |
| { |
| __iwl_trans_pcie_set_bits_mask(trans, reg, mask, 0); |
| } |
| |
| static inline void __iwl_trans_pcie_set_bit(struct iwl_trans *trans, |
| u32 reg, u32 mask) |
| { |
| __iwl_trans_pcie_set_bits_mask(trans, reg, mask, mask); |
| } |
| |
| static void iwl_pcie_set_pwr(struct iwl_trans *trans, bool vaux) |
| { |
| 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; |
| |
| /* |
| * 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) { |
| /* L1-ASPM enabled; disable(!) L0S */ |
| iwl_set_bit(trans, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED); |
| dev_info(trans->dev, "L1 Enabled; Disabling L0S\n"); |
| } else { |
| /* L1-ASPM disabled; enable(!) L0S */ |
| iwl_clear_bit(trans, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED); |
| dev_info(trans->dev, "L1 Disabled; Enabling L0S\n"); |
| } |
| trans->pm_support = !(lctl & PCI_EXP_LNKCTL_ASPM_L0S); |
| } |
| |
| /* |
| * 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) |
| { |
| struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_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) */ |
| 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; |
| } |
| |
| /* |
| * 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. |
| */ |
| 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); |
| |
| set_bit(STATUS_DEVICE_ENABLED, &trans_pcie->status); |
| |
| out: |
| return ret; |
| } |
| |
| 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) |
| 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) |
| { |
| struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| IWL_DEBUG_INFO(trans, "Stop card, put in low power state\n"); |
| |
| clear_bit(STATUS_DEVICE_ENABLED, &trans_pcie->status); |
| |
| /* Stop device's DMA activity */ |
| iwl_pcie_apm_stop_master(trans); |
| |
| /* 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); |
| unsigned long flags; |
| |
| /* nic_init */ |
| spin_lock_irqsave(&trans_pcie->irq_lock, flags); |
| iwl_pcie_apm_init(trans); |
| |
| /* Set interrupt coalescing calibration timer to default (512 usecs) */ |
| iwl_write8(trans, CSR_INT_COALESCING, IWL_HOST_INT_CALIB_TIMEOUT_DEF); |
| |
| spin_unlock_irqrestore(&trans_pcie->irq_lock, flags); |
| |
| 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); |
| |
| 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; |
| |
| 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; |
| |
| /* 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); |
| |
| 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; |
| int ret = 0; |
| |
| IWL_DEBUG_FW(trans, "[%d] uCode section being loaded...\n", |
| section_num); |
| |
| v_addr = dma_alloc_coherent(trans->dev, PAGE_SIZE, &p_addr, GFP_KERNEL); |
| if (!v_addr) |
| return -ENOMEM; |
| |
| for (offset = 0; offset < section->len; offset += PAGE_SIZE) { |
| u32 copy_size; |
| |
| copy_size = min_t(u32, PAGE_SIZE, section->len - offset); |
| |
| memcpy(v_addr, (u8 *)section->data + offset, copy_size); |
| ret = iwl_pcie_load_firmware_chunk(trans, |
| section->offset + offset, |
| p_addr, copy_size); |
| if (ret) { |
| IWL_ERR(trans, |
| "Could not load the [%d] uCode section\n", |
| section_num); |
| break; |
| } |
| } |
| |
| dma_free_coherent(trans->dev, PAGE_SIZE, v_addr, p_addr); |
| return ret; |
| } |
| |
| static int iwl_pcie_load_given_ucode(struct iwl_trans *trans, |
| const struct fw_img *image) |
| { |
| int i, ret = 0; |
| |
| for (i = 0; i < IWL_UCODE_SECTION_MAX; i++) { |
| if (!image->sec[i].data) |
| break; |
| |
| ret = iwl_pcie_load_section(trans, i, &image->sec[i]); |
| if (ret) |
| return ret; |
| } |
| |
| /* Remove all resets to allow NIC to operate */ |
| iwl_write32(trans, CSR_RESET, 0); |
| |
| return 0; |
| } |
| |
| 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); |
| int ret; |
| bool hw_rfkill; |
| |
| /* 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"); |
| return -EIO; |
| } |
| |
| clear_bit(STATUS_FW_ERROR, &trans_pcie->status); |
| |
| 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_pcie->status); |
| else |
| clear_bit(STATUS_RFKILL, &trans_pcie->status); |
| iwl_op_mode_hw_rf_kill(trans->op_mode, hw_rfkill); |
| if (hw_rfkill && !run_in_rfkill) |
| return -ERFKILL; |
| |
| iwl_write32(trans, CSR_INT, 0xFFFFFFFF); |
| |
| ret = iwl_pcie_nic_init(trans); |
| if (ret) { |
| IWL_ERR(trans, "Unable to init nic\n"); |
| return ret; |
| } |
| |
| /* 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 */ |
| return iwl_pcie_load_given_ucode(trans, fw); |
| } |
| |
| 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) |
| { |
| struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| unsigned long flags; |
| |
| /* tell the device to stop sending interrupts */ |
| spin_lock_irqsave(&trans_pcie->irq_lock, flags); |
| iwl_disable_interrupts(trans); |
| spin_unlock_irqrestore(&trans_pcie->irq_lock, flags); |
| |
| /* 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_bit(STATUS_DEVICE_ENABLED, &trans_pcie->status)) { |
| iwl_pcie_tx_stop(trans); |
| iwl_pcie_rx_stop(trans); |
| |
| /* Power-down device's busmaster DMA clocks */ |
| 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); |
| |
| /* Upon stop, the APM issues an interrupt if HW RF kill is set. |
| * Clean again the interrupt here |
| */ |
| spin_lock_irqsave(&trans_pcie->irq_lock, flags); |
| iwl_disable_interrupts(trans); |
| spin_unlock_irqrestore(&trans_pcie->irq_lock, flags); |
| |
| iwl_enable_rfkill_int(trans); |
| |
| /* stop and reset the on-board processor */ |
| iwl_write32(trans, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET); |
| |
| /* clear all status bits */ |
| clear_bit(STATUS_HCMD_ACTIVE, &trans_pcie->status); |
| clear_bit(STATUS_INT_ENABLED, &trans_pcie->status); |
| clear_bit(STATUS_DEVICE_ENABLED, &trans_pcie->status); |
| clear_bit(STATUS_TPOWER_PMI, &trans_pcie->status); |
| clear_bit(STATUS_RFKILL, &trans_pcie->status); |
| } |
| |
| static void iwl_trans_pcie_d3_suspend(struct iwl_trans *trans) |
| { |
| /* let the ucode operate on its own */ |
| iwl_write32(trans, CSR_UCODE_DRV_GP1_SET, |
| CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE); |
| |
| iwl_disable_interrupts(trans); |
| iwl_pcie_disable_ict(trans); |
| |
| 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); |
| |
| /* |
| * 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) |
| { |
| u32 val; |
| int ret; |
| |
| iwl_pcie_set_pwr(trans, false); |
| |
| val = iwl_read32(trans, CSR_RESET); |
| if (val & CSR_RESET_REG_FLAG_NEVO_RESET) { |
| *status = IWL_D3_STATUS_RESET; |
| 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); |
| |
| 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) { |
| IWL_ERR(trans, "Failed to resume the device (mac ready)\n"); |
| return ret; |
| } |
| |
| 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; |
| } |
| |
| iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, |
| CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE); |
| |
| *status = IWL_D3_STATUS_ALIVE; |
| return 0; |
| } |
| |
| static int iwl_trans_pcie_start_hw(struct iwl_trans *trans) |
| { |
| struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| bool hw_rfkill; |
| int err; |
| |
| err = iwl_pcie_prepare_card_hw(trans); |
| if (err) { |
| IWL_ERR(trans, "Error while preparing HW: %d\n", err); |
| return err; |
| } |
| |
| iwl_pcie_apm_init(trans); |
| |
| /* From now on, the op_mode will be kept updated about RF kill state */ |
| iwl_enable_rfkill_int(trans); |
| |
| hw_rfkill = iwl_is_rfkill_set(trans); |
| if (hw_rfkill) |
| set_bit(STATUS_RFKILL, &trans_pcie->status); |
| else |
| clear_bit(STATUS_RFKILL, &trans_pcie->status); |
| iwl_op_mode_hw_rf_kill(trans->op_mode, hw_rfkill); |
| |
| return 0; |
| } |
| |
| static void iwl_trans_pcie_stop_hw(struct iwl_trans *trans, |
| bool op_mode_leaving) |
| { |
| struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| bool hw_rfkill; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&trans_pcie->irq_lock, flags); |
| iwl_disable_interrupts(trans); |
| spin_unlock_irqrestore(&trans_pcie->irq_lock, flags); |
| |
| iwl_pcie_apm_stop(trans); |
| |
| spin_lock_irqsave(&trans_pcie->irq_lock, flags); |
| iwl_disable_interrupts(trans); |
| spin_unlock_irqrestore(&trans_pcie->irq_lock, flags); |
| |
| iwl_pcie_disable_ict(trans); |
| |
| if (!op_mode_leaving) { |
| /* |
| * 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. |
| */ |
| hw_rfkill = iwl_is_rfkill_set(trans); |
| if (hw_rfkill) |
| set_bit(STATUS_RFKILL, &trans_pcie->status); |
| else |
| clear_bit(STATUS_RFKILL, &trans_pcie->status); |
| iwl_op_mode_hw_rf_kill(trans->op_mode, hw_rfkill); |
| } |
| } |
| |
| 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 | (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 & 0x0000FFFF) | (3 << 24))); |
| iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_WDAT, val); |
| } |
| |
| 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; |
| 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_8k = trans_cfg->rx_buf_size_8k; |
| if (trans_pcie->rx_buf_size_8k) |
| trans_pcie->rx_page_order = get_order(8 * 1024); |
| else |
| trans_pcie->rx_page_order = get_order(4 * 1024); |
| |
| trans_pcie->wd_timeout = |
| msecs_to_jiffies(trans_cfg->queue_watchdog_timeout); |
| |
| trans_pcie->command_names = trans_cfg->command_names; |
| trans_pcie->bc_table_dword = trans_cfg->bc_table_dword; |
| } |
| |
| void iwl_trans_pcie_free(struct iwl_trans *trans) |
| { |
| struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| |
| 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); |
| kmem_cache_destroy(trans->dev_cmd_pool); |
| |
| kfree(trans); |
| } |
| |
| static void iwl_trans_pcie_set_pmi(struct iwl_trans *trans, bool state) |
| { |
| struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| |
| if (state) |
| set_bit(STATUS_TPOWER_PMI, &trans_pcie->status); |
| else |
| clear_bit(STATUS_TPOWER_PMI, &trans_pcie->status); |
| } |
| |
| #ifdef CONFIG_PM_SLEEP |
| static int iwl_trans_pcie_suspend(struct iwl_trans *trans) |
| { |
| return 0; |
| } |
| |
| static int iwl_trans_pcie_resume(struct iwl_trans *trans) |
| { |
| bool hw_rfkill; |
| |
| iwl_enable_rfkill_int(trans); |
| |
| hw_rfkill = iwl_is_rfkill_set(trans); |
| iwl_op_mode_hw_rf_kill(trans->op_mode, hw_rfkill); |
| |
| return 0; |
| } |
| #endif /* CONFIG_PM_SLEEP */ |
| |
| static bool iwl_trans_pcie_grab_nic_access(struct iwl_trans *trans, bool silent, |
| unsigned long *flags) |
| { |
| int ret; |
| struct iwl_trans_pcie *pcie_trans = IWL_TRANS_GET_PCIE_TRANS(trans); |
| spin_lock_irqsave(&pcie_trans->reg_lock, *flags); |
| |
| /* this bit wakes up the NIC */ |
| __iwl_trans_pcie_set_bit(trans, CSR_GP_CNTRL, |
| CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); |
| |
| /* |
| * 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); |
| if (!silent) { |
| u32 val = iwl_read32(trans, CSR_GP_CNTRL); |
| WARN_ONCE(1, |
| "Timeout waiting for hardware access (CSR_GP_CNTRL 0x%08x)\n", |
| val); |
| spin_unlock_irqrestore(&pcie_trans->reg_lock, *flags); |
| return false; |
| } |
| } |
| |
| /* |
| * Fool sparse by faking we release the lock - sparse will |
| * track nic_access anyway. |
| */ |
| __release(&pcie_trans->reg_lock); |
| return true; |
| } |
| |
| static void iwl_trans_pcie_release_nic_access(struct iwl_trans *trans, |
| unsigned long *flags) |
| { |
| struct iwl_trans_pcie *pcie_trans = IWL_TRANS_GET_PCIE_TRANS(trans); |
| |
| lockdep_assert_held(&pcie_trans->reg_lock); |
| |
| /* |
| * Fool sparse by faking we acquiring the lock - sparse will |
| * track nic_access anyway. |
| */ |
| __acquire(&pcie_trans->reg_lock); |
| |
| __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(); |
| spin_unlock_irqrestore(&pcie_trans->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, false, &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, |
| void *buf, int dwords) |
| { |
| unsigned long flags; |
| int offs, ret = 0; |
| u32 *vals = buf; |
| |
| if (iwl_trans_grab_nic_access(trans, false, &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; |
| } |
| |
| #define IWL_FLUSH_WAIT_MS 2000 |
| |
| static int iwl_trans_pcie_wait_txq_empty(struct iwl_trans *trans) |
| { |
| 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++) { |
| if (cnt == trans_pcie->cmd_queue) |
| continue; |
| txq = &trans_pcie->txq[cnt]; |
| q = &txq->q; |
| while (q->read_ptr != q->write_ptr && !time_after(jiffies, |
| now + msecs_to_jiffies(IWL_FLUSH_WAIT_MS))) |
| 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; |
| } |
| } |
| |
| 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)) & (txq->q.n_bd - 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); |
| } |
| |
| static const char *get_fh_string(int cmd) |
| { |
| #define IWL_CMD(x) case x: return #x |
| switch (cmd) { |
| IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG); |
| IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG); |
| IWL_CMD(FH_RSCSR_CHNL0_WPTR); |
| IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG); |
| IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG); |
| IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG); |
| IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV); |
| IWL_CMD(FH_TSSR_TX_STATUS_REG); |
| IWL_CMD(FH_TSSR_TX_ERROR_REG); |
| default: |
| return "UNKNOWN"; |
| } |
| #undef IWL_CMD |
| } |
| |
| int iwl_pcie_dump_fh(struct iwl_trans *trans, char **buf) |
| { |
| int i; |
| static const u32 fh_tbl[] = { |
| FH_RSCSR_CHNL0_STTS_WPTR_REG, |
| FH_RSCSR_CHNL0_RBDCB_BASE_REG, |
| FH_RSCSR_CHNL0_WPTR, |
| FH_MEM_RCSR_CHNL0_CONFIG_REG, |
| FH_MEM_RSSR_SHARED_CTRL_REG, |
| FH_MEM_RSSR_RX_STATUS_REG, |
| FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV, |
| FH_TSSR_TX_STATUS_REG, |
| FH_TSSR_TX_ERROR_REG |
| }; |
| |
| #ifdef CONFIG_IWLWIFI_DEBUGFS |
| if (buf) { |
| int pos = 0; |
| size_t bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40; |
| |
| *buf = kmalloc(bufsz, GFP_KERNEL); |
| if (!*buf) |
| return -ENOMEM; |
| |
| pos += scnprintf(*buf + pos, bufsz - pos, |
| "FH register values:\n"); |
| |
| for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) |
| pos += scnprintf(*buf + pos, bufsz - pos, |
| " %34s: 0X%08x\n", |
| get_fh_string(fh_tbl[i]), |
| iwl_read_direct32(trans, fh_tbl[i])); |
| |
| return pos; |
| } |
| #endif |
| |
| IWL_ERR(trans, "FH register values:\n"); |
| for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) |
| IWL_ERR(trans, " %34s: 0X%08x\n", |
| get_fh_string(fh_tbl[i]), |
| iwl_read_direct32(trans, fh_tbl[i])); |
| |
| return 0; |
| } |
| |
| 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_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_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_FUNC(name) \ |
| static ssize_t iwl_dbgfs_##name##_read(struct file *file, \ |
| char __user *user_buf, \ |
| size_t count, loff_t *ppos); |
| |
| #define DEBUGFS_WRITE_FUNC(name) \ |
| static ssize_t iwl_dbgfs_##name##_write(struct file *file, \ |
| const char __user *user_buf, \ |
| size_t count, loff_t *ppos); |
| |
| #define DEBUGFS_READ_FILE_OPS(name) \ |
| DEBUGFS_READ_FUNC(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) \ |
| DEBUGFS_WRITE_FUNC(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) \ |
| DEBUGFS_READ_FUNC(name); \ |
| DEBUGFS_WRITE_FUNC(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) * 64 * 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\n", |
| cnt, q->read_ptr, q->write_ptr, |
| !!test_bit(cnt, trans_pcie->queue_used), |
| !!test_bit(cnt, trans_pcie->queue_stopped)); |
| } |
| 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, "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; |
| int pos = 0; |
| ssize_t ret = -EFAULT; |
| |
| ret = pos = iwl_pcie_dump_fh(trans, &buf); |
| if (buf) { |
| ret = simple_read_from_buffer(user_buf, |
| count, ppos, buf, pos); |
| kfree(buf); |
| } |
| |
| return ret; |
| } |
| |
| static ssize_t iwl_dbgfs_fw_restart_write(struct file *file, |
| const char __user *user_buf, |
| size_t count, loff_t *ppos) |
| { |
| struct iwl_trans *trans = file->private_data; |
| |
| if (!trans->op_mode) |
| return -EAGAIN; |
| |
| local_bh_disable(); |
| iwl_op_mode_nic_error(trans->op_mode); |
| local_bh_enable(); |
| |
| return count; |
| } |
| |
| 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); |
| DEBUGFS_WRITE_FILE_OPS(fw_restart); |
| |
| /* |
| * Create the debugfs files and directories |
| * |
| */ |
| static int iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans, |
| struct dentry *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); |
| DEBUGFS_ADD_FILE(fw_restart, dir, S_IWUSR); |
| return 0; |
| |
| err: |
| IWL_ERR(trans, "failed to create the trans debugfs entry\n"); |
| return -ENOMEM; |
| } |
| #else |
| static int iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans, |
| struct dentry *dir) |
| { |
| return 0; |
| } |
| #endif /*CONFIG_IWLWIFI_DEBUGFS */ |
| |
| static const struct iwl_trans_ops trans_ops_pcie = { |
| .start_hw = iwl_trans_pcie_start_hw, |
| .stop_hw = iwl_trans_pcie_stop_hw, |
| .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, |
| |
| .dbgfs_register = iwl_trans_pcie_dbgfs_register, |
| |
| .wait_tx_queue_empty = iwl_trans_pcie_wait_txq_empty, |
| |
| #ifdef CONFIG_PM_SLEEP |
| .suspend = iwl_trans_pcie_suspend, |
| .resume = iwl_trans_pcie_resume, |
| #endif |
| .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, |
| }; |
| |
| 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 err; |
| |
| trans = kzalloc(sizeof(struct iwl_trans) + |
| sizeof(struct iwl_trans_pcie), GFP_KERNEL); |
| |
| if (!trans) |
| return NULL; |
| |
| trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| |
| trans->ops = &trans_ops_pcie; |
| trans->cfg = cfg; |
| trans_lockdep_init(trans); |
| trans_pcie->trans = trans; |
| spin_lock_init(&trans_pcie->irq_lock); |
| spin_lock_init(&trans_pcie->reg_lock); |
| init_waitqueue_head(&trans_pcie->ucode_write_waitq); |
| |
| /* 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); |
| |
| if (pci_enable_device(pdev)) { |
| err = -ENODEV; |
| goto out_no_pci; |
| } |
| |
| pci_set_master(pdev); |
| |
| err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36)); |
| if (!err) |
| err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36)); |
| if (err) { |
| err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); |
| if (!err) |
| err = pci_set_consistent_dma_mask(pdev, |
| DMA_BIT_MASK(32)); |
| /* both attempts failed: */ |
| if (err) { |
| dev_err(&pdev->dev, "No suitable DMA available\n"); |
| goto out_pci_disable_device; |
| } |
| } |
| |
| err = pci_request_regions(pdev, DRV_NAME); |
| if (err) { |
| 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"); |
| err = -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); |
| |
| err = pci_enable_msi(pdev); |
| if (err) { |
| dev_err(&pdev->dev, "pci_enable_msi failed(0X%x)\n", err); |
| /* 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->dev = &pdev->dev; |
| trans_pcie->pci_dev = pdev; |
| trans->hw_rev = iwl_read32(trans, CSR_HW_REV); |
| 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); |
| |
| snprintf(trans->dev_cmd_pool_name, sizeof(trans->dev_cmd_pool_name), |
| "iwl_cmd_pool:%s", dev_name(trans->dev)); |
| |
| trans->dev_cmd_headroom = 0; |
| trans->dev_cmd_pool = |
| kmem_cache_create(trans->dev_cmd_pool_name, |
| sizeof(struct iwl_device_cmd) |
| + trans->dev_cmd_headroom, |
| sizeof(void *), |
| SLAB_HWCACHE_ALIGN, |
| NULL); |
| |
| if (!trans->dev_cmd_pool) |
| goto out_pci_disable_msi; |
| |
| trans_pcie->inta_mask = CSR_INI_SET_MASK; |
| |
| if (iwl_pcie_alloc_ict(trans)) |
| goto out_free_cmd_pool; |
| |
| if (request_threaded_irq(pdev->irq, iwl_pcie_isr_ict, |
| iwl_pcie_irq_handler, |
| IRQF_SHARED, DRV_NAME, trans)) { |
| IWL_ERR(trans, "Error allocating IRQ %d\n", pdev->irq); |
| goto out_free_ict; |
| } |
| |
| return trans; |
| |
| out_free_ict: |
| iwl_pcie_free_ict(trans); |
| out_free_cmd_pool: |
| kmem_cache_destroy(trans->dev_cmd_pool); |
| 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: |
| kfree(trans); |
| return NULL; |
| } |