blob: c4375b868901d092cc76c9b31d3d0b5f96b4f044 [file] [log] [blame]
/******************************************************************************
*
* 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 - 2017 Intel Deutschland GmbH
* Copyright(c) 2018 - 2019 Intel Corporation
*
* 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.
*
* 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 - 2017 Intel Deutschland GmbH
* Copyright(c) 2018 - 2019 Intel Corporation
* 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 <linux/pm_runtime.h>
#include <linux/module.h>
#include <linux/wait.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 "fw/error-dump.h"
#include "fw/dbg.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
void iwl_trans_pcie_dump_regs(struct iwl_trans *trans)
{
#define PCI_DUMP_SIZE 64
#define PREFIX_LEN 32
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
struct pci_dev *pdev = trans_pcie->pci_dev;
u32 i, pos, alloc_size, *ptr, *buf;
char *prefix;
if (trans_pcie->pcie_dbg_dumped_once)
return;
/* Should be a multiple of 4 */
BUILD_BUG_ON(PCI_DUMP_SIZE > 4096 || PCI_DUMP_SIZE & 0x3);
/* Alloc a max size buffer */
if (PCI_ERR_ROOT_ERR_SRC + 4 > PCI_DUMP_SIZE)
alloc_size = PCI_ERR_ROOT_ERR_SRC + 4 + PREFIX_LEN;
else
alloc_size = PCI_DUMP_SIZE + PREFIX_LEN;
buf = kmalloc(alloc_size, GFP_ATOMIC);
if (!buf)
return;
prefix = (char *)buf + alloc_size - PREFIX_LEN;
IWL_ERR(trans, "iwlwifi transaction failed, dumping registers\n");
/* Print wifi device registers */
sprintf(prefix, "iwlwifi %s: ", pci_name(pdev));
IWL_ERR(trans, "iwlwifi device config registers:\n");
for (i = 0, ptr = buf; i < PCI_DUMP_SIZE; i += 4, ptr++)
if (pci_read_config_dword(pdev, i, ptr))
goto err_read;
print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET, 32, 4, buf, i, 0);
IWL_ERR(trans, "iwlwifi device memory mapped registers:\n");
for (i = 0, ptr = buf; i < PCI_DUMP_SIZE; i += 4, ptr++)
*ptr = iwl_read32(trans, i);
print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET, 32, 4, buf, i, 0);
pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
if (pos) {
IWL_ERR(trans, "iwlwifi device AER capability structure:\n");
for (i = 0, ptr = buf; i < PCI_ERR_ROOT_COMMAND; i += 4, ptr++)
if (pci_read_config_dword(pdev, pos + i, ptr))
goto err_read;
print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET,
32, 4, buf, i, 0);
}
/* Print parent device registers next */
if (!pdev->bus->self)
goto out;
pdev = pdev->bus->self;
sprintf(prefix, "iwlwifi %s: ", pci_name(pdev));
IWL_ERR(trans, "iwlwifi parent port (%s) config registers:\n",
pci_name(pdev));
for (i = 0, ptr = buf; i < PCI_DUMP_SIZE; i += 4, ptr++)
if (pci_read_config_dword(pdev, i, ptr))
goto err_read;
print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET, 32, 4, buf, i, 0);
/* Print root port AER registers */
pos = 0;
pdev = pcie_find_root_port(pdev);
if (pdev)
pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
if (pos) {
IWL_ERR(trans, "iwlwifi root port (%s) AER cap structure:\n",
pci_name(pdev));
sprintf(prefix, "iwlwifi %s: ", pci_name(pdev));
for (i = 0, ptr = buf; i <= PCI_ERR_ROOT_ERR_SRC; i += 4, ptr++)
if (pci_read_config_dword(pdev, pos + i, ptr))
goto err_read;
print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET, 32,
4, buf, i, 0);
}
goto out;
err_read:
print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET, 32, 4, buf, i, 0);
IWL_ERR(trans, "Read failed at 0x%X\n", i);
out:
trans_pcie->pcie_dbg_dumped_once = 1;
kfree(buf);
}
static void iwl_trans_pcie_sw_reset(struct iwl_trans *trans)
{
/* Reset entire device - do controller reset (results in SHRD_HW_RST) */
iwl_set_bit(trans, trans->cfg->csr->addr_sw_reset,
BIT(trans->cfg->csr->flag_sw_reset));
usleep_range(5000, 6000);
}
static void iwl_pcie_free_fw_monitor(struct iwl_trans *trans)
{
int i;
for (i = 0; i < trans->num_blocks; i++) {
dma_free_coherent(trans->dev, trans->fw_mon[i].size,
trans->fw_mon[i].block,
trans->fw_mon[i].physical);
trans->fw_mon[i].block = NULL;
trans->fw_mon[i].physical = 0;
trans->fw_mon[i].size = 0;
trans->num_blocks--;
}
}
static void iwl_pcie_alloc_fw_monitor_block(struct iwl_trans *trans,
u8 max_power, u8 min_power)
{
void *cpu_addr = NULL;
dma_addr_t phys = 0;
u32 size = 0;
u8 power;
for (power = max_power; power >= min_power; power--) {
size = BIT(power);
cpu_addr = dma_alloc_coherent(trans->dev, size, &phys,
GFP_KERNEL | __GFP_NOWARN |
__GFP_ZERO | __GFP_COMP);
if (!cpu_addr)
continue;
IWL_INFO(trans,
"Allocated 0x%08x bytes for firmware monitor.\n",
size);
break;
}
if (WARN_ON_ONCE(!cpu_addr))
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->fw_mon[trans->num_blocks].block = cpu_addr;
trans->fw_mon[trans->num_blocks].physical = phys;
trans->fw_mon[trans->num_blocks].size = size;
trans->num_blocks++;
}
void iwl_pcie_alloc_fw_monitor(struct iwl_trans *trans, u8 max_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;
/*
* This function allocats the default fw monitor.
* The optional additional ones will be allocated in runtime
*/
if (trans->num_blocks)
return;
iwl_pcie_alloc_fw_monitor_block(trans, max_power, 11);
}
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
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;
IWL_DEBUG_POWER(trans, "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;
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)
iwl_set_bit(trans, CSR_ANA_PLL_CFG, CSR50_ANA_PLL_CFG_VAL);
ret = iwl_finish_nic_init(trans);
if (ret)
return ret;
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);
return 0;
}
/*
* 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);
iwl_trans_pcie_sw_reset(trans);
ret = iwl_finish_nic_init(trans);
if (WARN_ON(ret)) {
/* 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);
iwl_trans_pcie_sw_reset(trans);
/* 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,
BIT(trans->cfg->csr->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);
}
void iwl_pcie_apm_stop_master(struct iwl_trans *trans)
{
int ret;
/* stop device's busmaster DMA activity */
iwl_set_bit(trans, trans->cfg->csr->addr_sw_reset,
BIT(trans->cfg->csr->flag_stop_master));
ret = iwl_poll_bit(trans, trans->cfg->csr->addr_sw_reset,
BIT(trans->cfg->csr->flag_master_dis),
BIT(trans->cfg->csr->flag_master_dis), 100);
if (ret < 0)
IWL_WARN(trans, "Master Disable Timed Out, 100 usec\n");
IWL_DEBUG_INFO(trans, "stop master\n");
}
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;
}
iwl_trans_pcie_sw_reset(trans);
/*
* Clear "initialization complete" bit to move adapter from
* D0A* (powered-up Active) --> D0U* (Uninitialized) state.
*/
iwl_clear_bit(trans, CSR_GP_CNTRL,
BIT(trans->cfg->csr->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);
int ret;
/* nic_init */
spin_lock(&trans_pcie->irq_lock);
ret = iwl_pcie_apm_init(trans);
spin_unlock(&trans_pcie->irq_lock);
if (ret)
return ret;
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 */
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);
usleep_range(1000, 2000);
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 void iwl_pcie_load_firmware_chunk_fh(struct iwl_trans *trans,
u32 dst_addr, dma_addr_t phy_addr,
u32 byte_cnt)
{
iwl_write32(trans, FH_TCSR_CHNL_TX_CONFIG_REG(FH_SRVC_CHNL),
FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE);
iwl_write32(trans, FH_SRVC_CHNL_SRAM_ADDR_REG(FH_SRVC_CHNL),
dst_addr);
iwl_write32(trans, FH_TFDIB_CTRL0_REG(FH_SRVC_CHNL),
phy_addr & FH_MEM_TFDIB_DRAM_ADDR_LSB_MSK);
iwl_write32(trans, FH_TFDIB_CTRL1_REG(FH_SRVC_CHNL),
(iwl_get_dma_hi_addr(phy_addr)
<< FH_MEM_TFDIB_REG1_ADDR_BITSHIFT) | byte_cnt);
iwl_write32(trans, FH_TCSR_CHNL_TX_BUF_STS_REG(FH_SRVC_CHNL),
BIT(FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_NUM) |
BIT(FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_IDX) |
FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_VALID);
iwl_write32(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);
}
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);
unsigned long flags;
int ret;
trans_pcie->ucode_write_complete = false;
if (!iwl_trans_grab_nic_access(trans, &flags))
return -EIO;
iwl_pcie_load_firmware_chunk_fh(trans, dst_addr, phy_addr,
byte_cnt);
iwl_trans_release_nic_access(trans, &flags);
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");
iwl_trans_pcie_dump_regs(trans);
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;
}
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 < image->num_sec; 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 ucode of 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;
iwl_enable_interrupts(trans);
if (trans->cfg->use_tfh) {
if (cpu == 1)
iwl_write_prph(trans, UREG_UCODE_LOAD_STATUS,
0xFFFF);
else
iwl_write_prph(trans, UREG_UCODE_LOAD_STATUS,
0xFFFFFFFF);
} else {
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 i, ret = 0;
u32 last_read_idx = 0;
if (cpu == 1)
*first_ucode_section = 0;
else
(*first_ucode_section)++;
for (i = *first_ucode_section; i < image->num_sec; 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;
}
*first_ucode_section = last_read_idx;
return 0;
}
void iwl_pcie_apply_destination(struct iwl_trans *trans)
{
const struct iwl_fw_dbg_dest_tlv_v1 *dest = trans->dbg_dest_tlv;
int i;
if (trans->ini_valid) {
if (!trans->num_blocks)
return;
iwl_write_umac_prph(trans, MON_BUFF_BASE_ADDR_VER2,
trans->fw_mon[0].physical >>
MON_BUFF_SHIFT_VER2);
iwl_write_umac_prph(trans, MON_BUFF_END_ADDR_VER2,
(trans->fw_mon[0].physical +
trans->fw_mon[0].size - 256) >>
MON_BUFF_SHIFT_VER2);
return;
}
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_n_dest_reg; 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->fw_mon[0].size) {
iwl_write_prph(trans, le32_to_cpu(dest->base_reg),
trans->fw_mon[0].physical >> dest->base_shift);
if (trans->cfg->device_family >= IWL_DEVICE_FAMILY_8000)
iwl_write_prph(trans, le32_to_cpu(dest->end_reg),
(trans->fw_mon[0].physical +
trans->fw_mon[0].size - 256) >>
dest->end_shift);
else
iwl_write_prph(trans, le32_to_cpu(dest->end_reg),
(trans->fw_mon[0].physical +
trans->fw_mon[0].size) >>
dest->end_shift);
}
}
static int iwl_pcie_load_given_ucode(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");
/* 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->fw_mon[0].size) {
iwl_write_prph(trans, MON_BUFF_BASE_ADDR,
trans->fw_mon[0].physical >> 4);
iwl_write_prph(trans, MON_BUFF_END_ADDR,
(trans->fw_mon[0].physical +
trans->fw_mon[0].size) >> 4);
}
} else if (iwl_pcie_dbg_on(trans)) {
iwl_pcie_apply_destination(trans);
}
iwl_enable_interrupts(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 (iwl_pcie_dbg_on(trans))
iwl_pcie_apply_destination(trans);
IWL_DEBUG_POWER(trans, "Original WFPM value = 0x%08X\n",
iwl_read_prph(trans, WFPM_GP2));
/*
* Set default value. On resume reading the values that were
* zeored can provide debug data on the resume flow.
* This is for debugging only and has no functional impact.
*/
iwl_write_prph(trans, WFPM_GP2, 0x01010101);
/* 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);
}
bool iwl_pcie_check_hw_rf_kill(struct iwl_trans *trans)
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
bool hw_rfkill = iwl_is_rfkill_set(trans);
bool prev = test_bit(STATUS_RFKILL_OPMODE, &trans->status);
bool report;
if (hw_rfkill) {
set_bit(STATUS_RFKILL_HW, &trans->status);
set_bit(STATUS_RFKILL_OPMODE, &trans->status);
} else {
clear_bit(STATUS_RFKILL_HW, &trans->status);
if (trans_pcie->opmode_down)
clear_bit(STATUS_RFKILL_OPMODE, &trans->status);
}
report = test_bit(STATUS_RFKILL_OPMODE, &trans->status);
if (prev != report)
iwl_trans_pcie_rf_kill(trans, report);
return hw_rfkill;
}
struct iwl_causes_list {
u32 cause_num;
u32 mask_reg;
u8 addr;
};
static struct iwl_causes_list causes_list[] = {
{MSIX_FH_INT_CAUSES_D2S_CH0_NUM, CSR_MSIX_FH_INT_MASK_AD, 0},
{MSIX_FH_INT_CAUSES_D2S_CH1_NUM, CSR_MSIX_FH_INT_MASK_AD, 0x1},
{MSIX_FH_INT_CAUSES_S2D, CSR_MSIX_FH_INT_MASK_AD, 0x3},
{MSIX_FH_INT_CAUSES_FH_ERR, CSR_MSIX_FH_INT_MASK_AD, 0x5},
{MSIX_HW_INT_CAUSES_REG_ALIVE, CSR_MSIX_HW_INT_MASK_AD, 0x10},
{MSIX_HW_INT_CAUSES_REG_WAKEUP, CSR_MSIX_HW_INT_MASK_AD, 0x11},
{MSIX_HW_INT_CAUSES_REG_IML, CSR_MSIX_HW_INT_MASK_AD, 0x12},
{MSIX_HW_INT_CAUSES_REG_CT_KILL, CSR_MSIX_HW_INT_MASK_AD, 0x16},
{MSIX_HW_INT_CAUSES_REG_RF_KILL, CSR_MSIX_HW_INT_MASK_AD, 0x17},
{MSIX_HW_INT_CAUSES_REG_PERIODIC, CSR_MSIX_HW_INT_MASK_AD, 0x18},
{MSIX_HW_INT_CAUSES_REG_SW_ERR, CSR_MSIX_HW_INT_MASK_AD, 0x29},
{MSIX_HW_INT_CAUSES_REG_SCD, CSR_MSIX_HW_INT_MASK_AD, 0x2A},
{MSIX_HW_INT_CAUSES_REG_FH_TX, CSR_MSIX_HW_INT_MASK_AD, 0x2B},
{MSIX_HW_INT_CAUSES_REG_HW_ERR, CSR_MSIX_HW_INT_MASK_AD, 0x2D},
{MSIX_HW_INT_CAUSES_REG_HAP, CSR_MSIX_HW_INT_MASK_AD, 0x2E},
};
static struct iwl_causes_list causes_list_v2[] = {
{MSIX_FH_INT_CAUSES_D2S_CH0_NUM, CSR_MSIX_FH_INT_MASK_AD, 0},
{MSIX_FH_INT_CAUSES_D2S_CH1_NUM, CSR_MSIX_FH_INT_MASK_AD, 0x1},
{MSIX_FH_INT_CAUSES_S2D, CSR_MSIX_FH_INT_MASK_AD, 0x3},
{MSIX_FH_INT_CAUSES_FH_ERR, CSR_MSIX_FH_INT_MASK_AD, 0x5},
{MSIX_HW_INT_CAUSES_REG_ALIVE, CSR_MSIX_HW_INT_MASK_AD, 0x10},
{MSIX_HW_INT_CAUSES_REG_IPC, CSR_MSIX_HW_INT_MASK_AD, 0x11},
{MSIX_HW_INT_CAUSES_REG_SW_ERR_V2, CSR_MSIX_HW_INT_MASK_AD, 0x15},
{MSIX_HW_INT_CAUSES_REG_CT_KILL, CSR_MSIX_HW_INT_MASK_AD, 0x16},
{MSIX_HW_INT_CAUSES_REG_RF_KILL, CSR_MSIX_HW_INT_MASK_AD, 0x17},
{MSIX_HW_INT_CAUSES_REG_PERIODIC, CSR_MSIX_HW_INT_MASK_AD, 0x18},
{MSIX_HW_INT_CAUSES_REG_SCD, CSR_MSIX_HW_INT_MASK_AD, 0x2A},
{MSIX_HW_INT_CAUSES_REG_FH_TX, CSR_MSIX_HW_INT_MASK_AD, 0x2B},
{MSIX_HW_INT_CAUSES_REG_HW_ERR, CSR_MSIX_HW_INT_MASK_AD, 0x2D},
{MSIX_HW_INT_CAUSES_REG_HAP, CSR_MSIX_HW_INT_MASK_AD, 0x2E},
};
static void iwl_pcie_map_non_rx_causes(struct iwl_trans *trans)
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
int val = trans_pcie->def_irq | MSIX_NON_AUTO_CLEAR_CAUSE;
int i, arr_size =
(trans->cfg->device_family != IWL_DEVICE_FAMILY_22560) ?
ARRAY_SIZE(causes_list) : ARRAY_SIZE(causes_list_v2);
/*
* Access all non RX causes and map them to the default irq.
* In case we are missing at least one interrupt vector,
* the first interrupt vector will serve non-RX and FBQ causes.
*/
for (i = 0; i < arr_size; i++) {
struct iwl_causes_list *causes =
(trans->cfg->device_family != IWL_DEVICE_FAMILY_22560) ?
causes_list : causes_list_v2;
iwl_write8(trans, CSR_MSIX_IVAR(causes[i].addr), val);
iwl_clear_bit(trans, causes[i].mask_reg,
causes[i].cause_num);
}
}
static void iwl_pcie_map_rx_causes(struct iwl_trans *trans)
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
u32 offset =
trans_pcie->shared_vec_mask & IWL_SHARED_IRQ_FIRST_RSS ? 1 : 0;
u32 val, idx;
/*
* The first RX queue - fallback queue, which is designated for
* management frame, command responses etc, is always mapped to the
* first interrupt vector. The other RX queues are mapped to
* the other (N - 2) interrupt vectors.
*/
val = BIT(MSIX_FH_INT_CAUSES_Q(0));
for (idx = 1; idx < trans->num_rx_queues; idx++) {
iwl_write8(trans, CSR_MSIX_RX_IVAR(idx),
MSIX_FH_INT_CAUSES_Q(idx - offset));
val |= BIT(MSIX_FH_INT_CAUSES_Q(idx));
}
iwl_write32(trans, CSR_MSIX_FH_INT_MASK_AD, ~val);
val = MSIX_FH_INT_CAUSES_Q(0);
if (trans_pcie->shared_vec_mask & IWL_SHARED_IRQ_NON_RX)
val |= MSIX_NON_AUTO_CLEAR_CAUSE;
iwl_write8(trans, CSR_MSIX_RX_IVAR(0), val);
if (trans_pcie->shared_vec_mask & IWL_SHARED_IRQ_FIRST_RSS)
iwl_write8(trans, CSR_MSIX_RX_IVAR(1), val);
}
void iwl_pcie_conf_msix_hw(struct iwl_trans_pcie *trans_pcie)
{
struct iwl_trans *trans = trans_pcie->trans;
if (!trans_pcie->msix_enabled) {
if (trans->cfg->mq_rx_supported &&
test_bit(STATUS_DEVICE_ENABLED, &trans->status))
iwl_write_umac_prph(trans, UREG_CHICK,
UREG_CHICK_MSI_ENABLE);
return;
}
/*
* The IVAR table needs to be configured again after reset,
* but if the device is disabled, we can't write to
* prph.
*/
if (test_bit(STATUS_DEVICE_ENABLED, &trans->status))
iwl_write_umac_prph(trans, UREG_CHICK, UREG_CHICK_MSIX_ENABLE);
/*
* Each cause from the causes list above and the RX causes is
* represented as a byte in the IVAR table. The first nibble
* represents the bound interrupt vector of the cause, the second
* represents no auto clear for this cause. This will be set if its
* interrupt vector is bound to serve other causes.
*/
iwl_pcie_map_rx_causes(trans);
iwl_pcie_map_non_rx_causes(trans);
}
static void iwl_pcie_init_msix(struct iwl_trans_pcie *trans_pcie)
{
struct iwl_trans *trans = trans_pcie->trans;
iwl_pcie_conf_msix_hw(trans_pcie);
if (!trans_pcie->msix_enabled)
return;
trans_pcie->fh_init_mask = ~iwl_read32(trans, CSR_MSIX_FH_INT_MASK_AD);
trans_pcie->fh_mask = trans_pcie->fh_init_mask;
trans_pcie->hw_init_mask = ~iwl_read32(trans, CSR_MSIX_HW_INT_MASK_AD);
trans_pcie->hw_mask = trans_pcie->hw_init_mask;
}
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);
lockdep_assert_held(&trans_pcie->mutex);
if (trans_pcie->is_down)
return;
trans_pcie->is_down = true;
/* Stop dbgc before stopping device */
_iwl_fw_dbg_stop_recording(trans, NULL);
/* tell the device to stop sending interrupts */
iwl_disable_interrupts(trans);
/* 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,
BIT(trans->cfg->csr->flag_mac_access_req));
/* Stop the device, and put it in low power state */
iwl_pcie_apm_stop(trans, false);
iwl_trans_pcie_sw_reset(trans);
/*
* Upon stop, the IVAR table gets erased, so msi-x won't
* work. This causes a bug in RF-KILL flows, since the interrupt
* that enables radio won't fire on the correct irq, and the
* driver won't be able to handle the interrupt.
* Configure the IVAR table again after reset.
*/
iwl_pcie_conf_msix_hw(trans_pcie);
/*
* 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.
*/
iwl_disable_interrupts(trans);
/* 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);
/*
* Even if we stop the HW, we still want the RF kill
* interrupt
*/
iwl_enable_rfkill_int(trans);
/* re-take ownership to prevent other users from stealing the device */
iwl_pcie_prepare_card_hw(trans);
}
void iwl_pcie_synchronize_irqs(struct iwl_trans *trans)
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
if (trans_pcie->msix_enabled) {
int i;
for (i = 0; i < trans_pcie->alloc_vecs; i++)
synchronize_irq(trans_pcie->msix_entries[i].vector);
} else {
synchronize_irq(trans_pcie->pci_dev->irq);
}
}
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;
/* 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);
iwl_write32(trans, CSR_INT, 0xFFFFFFFF);
/*
* We enabled the RF-Kill interrupt and the handler may very
* well be running. Disable the interrupts to make sure no other
* interrupt can be fired.
*/
iwl_disable_interrupts(trans);
/* Make sure it finished running */
iwl_pcie_synchronize_irqs(trans);
mutex_lock(&trans_pcie->mutex);
/* If platform's RF_KILL switch is NOT set to KILL */
hw_rfkill = iwl_pcie_check_hw_rf_kill(trans);
if (hw_rfkill && !run_in_rfkill) {
ret = -ERFKILL;
goto out;
}
/* 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;
}
/* 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);
ret = iwl_pcie_nic_init(trans);
if (ret) {
IWL_ERR(trans, "Unable to init nic\n");
goto out;
}
/*
* Now, we load the firmware and don't want to be interrupted, even
* by the RF-Kill interrupt (hence mask all the interrupt besides the
* FH_TX interrupt which is needed to load the firmware). If the
* RF-Kill switch is toggled, we will find out after having loaded
* the firmware and return the proper value to the caller.
*/
iwl_enable_fw_load_int(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);
/* re-check RF-Kill state since we may have missed the interrupt */
hw_rfkill = iwl_pcie_check_hw_rf_kill(trans);
if (hw_rfkill && !run_in_rfkill)
ret = -ERFKILL;
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);
}
void iwl_trans_pcie_handle_stop_rfkill(struct iwl_trans *trans,
bool was_in_rfkill)
{
bool hw_rfkill;
/*
* 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_HW, &trans->status);
set_bit(STATUS_RFKILL_OPMODE, &trans->status);
} else {
clear_bit(STATUS_RFKILL_HW, &trans->status);
clear_bit(STATUS_RFKILL_OPMODE, &trans->status);
}
if (hw_rfkill != was_in_rfkill)
iwl_trans_pcie_rf_kill(trans, hw_rfkill);
}
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 was_in_rfkill;
mutex_lock(&trans_pcie->mutex);
trans_pcie->opmode_down = true;
was_in_rfkill = test_bit(STATUS_RFKILL_OPMODE, &trans->status);
_iwl_trans_pcie_stop_device(trans, low_power);
iwl_trans_pcie_handle_stop_rfkill(trans, was_in_rfkill);
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);
IWL_WARN(trans, "reporting RF_KILL (radio %s)\n",
state ? "disabled" : "enabled");
if (iwl_op_mode_hw_rf_kill(trans->op_mode, state)) {
if (trans->cfg->gen2)
_iwl_trans_pcie_gen2_stop_device(trans, true);
else
_iwl_trans_pcie_stop_device(trans, true);
}
}
static void iwl_trans_pcie_d3_suspend(struct iwl_trans *trans, bool test,
bool reset)
{
if (!reset) {
/* 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);
iwl_pcie_synchronize_irqs(trans);
iwl_clear_bit(trans, CSR_GP_CNTRL,
BIT(trans->cfg->csr->flag_mac_access_req));
iwl_clear_bit(trans, CSR_GP_CNTRL,
BIT(trans->cfg->csr->flag_init_done));
if (reset) {
/*
* 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, bool reset)
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
u32 val;
int ret;
if (test) {
iwl_enable_interrupts(trans);
*status = IWL_D3_STATUS_ALIVE;
return 0;
}
iwl_set_bit(trans, CSR_GP_CNTRL,
BIT(trans->cfg->csr->flag_mac_access_req));
ret = iwl_finish_nic_init(trans);
if (ret)
return ret;
/*
* Reconfigure IVAR table in case of MSIX or reset ict table in
* MSI mode since HW reset erased it.
* 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_conf_msix_hw(trans_pcie);
if (!trans_pcie->msix_enabled)
iwl_pcie_reset_ict(trans);
iwl_enable_interrupts(trans);
iwl_pcie_set_pwr(trans, false);
if (!reset) {
iwl_clear_bit(trans, CSR_GP_CNTRL,
BIT(trans->cfg->csr->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;
}
}
IWL_DEBUG_POWER(trans, "WFPM value upon resume = 0x%08X\n",
iwl_read_umac_prph(trans, WFPM_GP2));
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 void iwl_pcie_set_interrupt_capa(struct pci_dev *pdev,
struct iwl_trans *trans)
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
int max_irqs, num_irqs, i, ret;
u16 pci_cmd;
if (!trans->cfg->mq_rx_supported)
goto enable_msi;
max_irqs = min_t(u32, num_online_cpus() + 2, IWL_MAX_RX_HW_QUEUES);
for (i = 0; i < max_irqs; i++)
trans_pcie->msix_entries[i].entry = i;
num_irqs = pci_enable_msix_range(pdev, trans_pcie->msix_entries,
MSIX_MIN_INTERRUPT_VECTORS,
max_irqs);
if (num_irqs < 0) {
IWL_DEBUG_INFO(trans,
"Failed to enable msi-x mode (ret %d). Moving to msi mode.\n",
num_irqs);
goto enable_msi;
}
trans_pcie->def_irq = (num_irqs == max_irqs) ? num_irqs - 1 : 0;
IWL_DEBUG_INFO(trans,
"MSI-X enabled. %d interrupt vectors were allocated\n",
num_irqs);
/*
* In case the OS provides fewer interrupts than requested, different
* causes will share the same interrupt vector as follows:
* One interrupt less: non rx causes shared with FBQ.
* Two interrupts less: non rx causes shared with FBQ and RSS.
* More than two interrupts: we will use fewer RSS queues.
*/
if (num_irqs <= max_irqs - 2) {
trans_pcie->trans->num_rx_queues = num_irqs + 1;
trans_pcie->shared_vec_mask = IWL_SHARED_IRQ_NON_RX |
IWL_SHARED_IRQ_FIRST_RSS;
} else if (num_irqs == max_irqs - 1) {
trans_pcie->trans->num_rx_queues = num_irqs;
trans_pcie->shared_vec_mask = IWL_SHARED_IRQ_NON_RX;
} else {
trans_pcie->trans->num_rx_queues = num_irqs - 1;
}
WARN_ON(trans_pcie->trans->num_rx_queues > IWL_MAX_RX_HW_QUEUES);
trans_pcie->alloc_vecs = num_irqs;
trans_pcie->msix_enabled = true;
return;
enable_msi:
ret = pci_enable_msi(pdev);
if (ret) {
dev_err(&pdev->dev, "pci_enable_msi failed - %d\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);
}
}
}
static void iwl_pcie_irq_set_affinity(struct iwl_trans *trans)
{
int iter_rx_q, i, ret, cpu, offset;
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
i = trans_pcie->shared_vec_mask & IWL_SHARED_IRQ_FIRST_RSS ? 0 : 1;
iter_rx_q = trans_pcie->trans->num_rx_queues - 1 + i;
offset = 1 + i;
for (; i < iter_rx_q ; i++) {
/*
* Get the cpu prior to the place to search
* (i.e. return will be > i - 1).
*/
cpu = cpumask_next(i - offset, cpu_online_mask);
cpumask_set_cpu(cpu, &trans_pcie->affinity_mask[i]);
ret = irq_set_affinity_hint(trans_pcie->msix_entries[i].vector,
&trans_pcie->affinity_mask[i]);
if (ret)
IWL_ERR(trans_pcie->trans,
"Failed to set affinity mask for IRQ %d\n",
i);
}
}
static int iwl_pcie_init_msix_handler(struct pci_dev *pdev,
struct iwl_trans_pcie *trans_pcie)
{
int i;
for (i = 0; i < trans_pcie->alloc_vecs; i++) {
int ret;
struct msix_entry *msix_entry;
const char *qname = queue_name(&pdev->dev, trans_pcie, i);
if (!qname)
return -ENOMEM;
msix_entry = &trans_pcie->msix_entries[i];
ret = devm_request_threaded_irq(&pdev->dev,
msix_entry->vector,
iwl_pcie_msix_isr,
(i == trans_pcie->def_irq) ?
iwl_pcie_irq_msix_handler :
iwl_pcie_irq_rx_msix_handler,
IRQF_SHARED,
qname,
msix_entry);
if (ret) {
IWL_ERR(trans_pcie->trans,
"Error allocating IRQ %d\n", i);
return ret;
}
}
iwl_pcie_irq_set_affinity(trans_pcie->trans);
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);
u32 hpm;
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;
}
hpm = iwl_read_umac_prph_no_grab(trans, HPM_DEBUG);
if (hpm != 0xa5a5a5a0 && (hpm & PERSISTENCE_BIT)) {
int wfpm_val = iwl_read_umac_prph_no_grab(trans,
PREG_PRPH_WPROT_0);
if (wfpm_val & PREG_WFPM_ACCESS) {
IWL_ERR(trans,
"Error, can not clear persistence bit\n");
return -EPERM;
}
iwl_write_umac_prph_no_grab(trans, HPM_DEBUG,
hpm & ~PERSISTENCE_BIT);
}
iwl_trans_pcie_sw_reset(trans);
err = iwl_pcie_apm_init(trans);
if (err)
return err;
iwl_pcie_init_msix(trans_pcie);
/* From now on, the op_mode will be kept updated about RF kill state */
iwl_enable_rfkill_int(trans);
trans_pcie->opmode_down = false;
/* Set is_down to false here so that...*/
trans_pcie->is_down = false;
/* ...rfkill can call stop_device and set it false if needed */
iwl_pcie_check_hw_rf_kill(trans);
/* Make sure we sync here, because we'll need full access later */
if (low_power)
pm_runtime_resume(trans->dev);
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 */
iwl_disable_interrupts(trans);
iwl_pcie_apm_stop(trans, true);
iwl_disable_interrupts(trans);
iwl_pcie_disable_ict(trans);
mutex_unlock(&trans_pcie->mutex);
iwl_pcie_synchronize_irqs(trans);
}
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_prph_msk(struct iwl_trans *trans)
{
if (trans->cfg->device_family >= IWL_DEVICE_FAMILY_22560)
return 0x00FFFFFF;
else
return 0x000FFFFF;
}
static u32 iwl_trans_pcie_read_prph(struct iwl_trans *trans, u32 reg)
{
u32 mask = iwl_trans_pcie_prph_msk(trans);
iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_RADDR,
((reg & mask) | (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)
{
u32 mask = iwl_trans_pcie_prph_msk(trans);
iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_WADDR,
((addr & mask) | (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;
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->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_pcie->page_offs = trans_cfg->cb_data_offs;
trans_pcie->dev_cmd_offs = trans_cfg->cb_data_offs + sizeof(void *);
trans->command_groups = trans_cfg->command_groups;
trans->command_groups_size = trans_cfg->command_groups_size;
/* 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_dev.reg_state != NETREG_DUMMY)
init_dummy_netdev(&trans_pcie->napi_dev);
}
void iwl_trans_pcie_free(struct iwl_trans *trans)
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
int i;
iwl_pcie_synchronize_irqs(trans);
if (trans->cfg->gen2)
iwl_pcie_gen2_tx_free(trans);
else
iwl_pcie_tx_free(trans);
iwl_pcie_rx_free(trans);
if (trans_pcie->rba.alloc_wq) {
destroy_workqueue(trans_pcie->rba.alloc_wq);
trans_pcie->rba.alloc_wq = NULL;
}
if (trans_pcie->msix_enabled) {
for (i = 0; i < trans_pcie->alloc_vecs; i++) {
irq_set_affinity_hint(
trans_pcie->msix_entries[i].vector,
NULL);
}
trans_pcie->msix_enabled = false;
} else {
iwl_pcie_free_ict(trans);
}
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);
mutex_destroy(&trans_pcie->mutex);
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);
}
struct iwl_trans_pcie_removal {
struct pci_dev *pdev;
struct work_struct work;
};
static void iwl_trans_pcie_removal_wk(struct work_struct *wk)
{
struct iwl_trans_pcie_removal *removal =
container_of(wk, struct iwl_trans_pcie_removal, work);
struct pci_dev *pdev = removal->pdev;
static char *prop[] = {"EVENT=INACCESSIBLE", NULL};
dev_err(&pdev->dev, "Device gone - attempting removal\n");
kobject_uevent_env(&pdev->dev.kobj, KOBJ_CHANGE, prop);
pci_lock_rescan_remove();
pci_dev_put(pdev);
pci_stop_and_remove_bus_device(pdev);
pci_unlock_rescan_remove();
kfree(removal);
module_put(THIS_MODULE);
}
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,
BIT(trans->cfg->csr->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;
* HW with volatile SRAM 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 the SRAM of HW with
* volatile 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,
BIT(trans->cfg->csr->flag_val_mac_access_en),
(BIT(trans->cfg->csr->flag_mac_clock_ready) |
CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 15000);
if (unlikely(ret < 0)) {
u32 cntrl = iwl_read32(trans, CSR_GP_CNTRL);
WARN_ONCE(1,
"Timeout waiting for hardware access (CSR_GP_CNTRL 0x%08x)\n",
cntrl);
iwl_trans_pcie_dump_regs(trans);
if (iwlwifi_mod_params.remove_when_gone && cntrl == ~0U) {
struct iwl_trans_pcie_removal *removal;
if (test_bit(STATUS_TRANS_DEAD, &trans->status))
goto err;
IWL_ERR(trans, "Device gone - scheduling removal!\n");
/*
* get a module reference to avoid doing this
* while unloading anyway and to avoid
* scheduling a work with code that's being
* removed.
*/
if (!try_module_get(THIS_MODULE)) {
IWL_ERR(trans,
"Module is being unloaded - abort\n");
goto err;
}
removal = kzalloc(sizeof(*removal), GFP_ATOMIC);
if (!removal) {
module_put(THIS_MODULE);
goto err;
}
/*
* we don't need to clear this flag, because
* the trans will be freed and reallocated.
*/
set_bit(STATUS_TRANS_DEAD, &trans->status);
removal->pdev = to_pci_dev(trans->dev);
INIT_WORK(&removal->work, iwl_trans_pcie_removal_wk);
pci_dev_get(removal->pdev);
schedule_work(&removal->work);
} else {
iwl_write32(trans, CSR_RESET,
CSR_RESET_REG_FLAG_FORCE_NMI);
}
err:
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,
BIT(trans->cfg->csr->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->read_ptr == txq->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->write_ptr | (i << 8));
}
} else if (block) {
txq->block++;
}
spin_unlock_bh(&txq->lock);
}
}
#define IWL_FLUSH_WAIT_MS 2000
void iwl_trans_pcie_log_scd_error(struct iwl_trans *trans, struct iwl_txq *txq)
{
u32 txq_id = txq->id;
u32 status;
bool active;
u8 fifo;
if (trans->cfg->use_tfh) {
IWL_ERR(trans, "Queue %d is stuck %d %d\n", txq_id,
txq->read_ptr, txq->write_ptr);
/* TODO: access new SCD registers and dump them */
return;
}
status = iwl_read_prph(trans, SCD_QUEUE_STATUS_BITS(txq_id));
fifo = (status >> SCD_QUEUE_STTS_REG_POS_TXF) & 0x7;
active = !!(status & BIT(SCD_QUEUE_STTS_REG_POS_ACTIVE));
IWL_ERR(trans,
"Queue %d is %sactive on fifo %d and stuck for %u ms. SW [%d, %d] HW [%d, %d] FH TRB=0x0%x\n",
txq_id, active ? "" : "in", fifo,
jiffies_to_msecs(txq->wd_timeout),
txq->read_ptr, txq->write_ptr,
iwl_read_prph(trans, SCD_QUEUE_RDPTR(txq_id)) &
(trans->cfg->base_params->max_tfd_queue_size - 1),
iwl_read_prph(trans, SCD_QUEUE_WRPTR(txq_id)) &
(trans->cfg->base_params->max_tfd_queue_size - 1),
iwl_read_direct32(trans, FH_TX_TRB_REG(fifo)));
}
static int iwl_trans_pcie_rxq_dma_data(struct iwl_trans *trans, int queue,
struct iwl_trans_rxq_dma_data *data)
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
if (queue >= trans->num_rx_queues || !trans_pcie->rxq)
return -EINVAL;
data->fr_bd_cb = trans_pcie->rxq[queue].bd_dma;
data->urbd_stts_wrptr = trans_pcie->rxq[queue].rb_stts_dma;
data->ur_bd_cb = trans_pcie->rxq[queue].used_bd_dma;
data->fr_bd_wid = 0;
return 0;
}
static int iwl_trans_pcie_wait_txq_empty(struct iwl_trans *trans, int txq_idx)
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
struct iwl_txq *txq;
unsigned long now = jiffies;
bool overflow_tx;
u8 wr_ptr;
/* Make sure the NIC is still alive in the bus */
if (test_bit(STATUS_TRANS_DEAD, &trans->status))
return -ENODEV;
if (!test_bit(txq_idx, trans_pcie->queue_used))
return -EINVAL;
IWL_DEBUG_TX_QUEUES(trans, "Emptying queue %d...\n", txq_idx);
txq = trans_pcie->txq[txq_idx];
spin_lock_bh(&txq->lock);
overflow_tx = txq->overflow_tx ||
!skb_queue_empty(&txq->overflow_q);
spin_unlock_bh(&txq->lock);
wr_ptr = READ_ONCE(txq->write_ptr);
while ((txq->read_ptr != READ_ONCE(txq->write_ptr) ||
overflow_tx) &&
!time_after(jiffies,
now + msecs_to_jiffies(IWL_FLUSH_WAIT_MS))) {
u8 write_ptr = READ_ONCE(txq->write_ptr);
/*
* If write pointer moved during the wait, warn only
* if the TX came from op mode. In case TX came from
* trans layer (overflow TX) don't warn.
*/
if (WARN_ONCE(wr_ptr != write_ptr && !overflow_tx,
"WR pointer moved while flushing %d -> %d\n",
wr_ptr, write_ptr))
return -ETIMEDOUT;
wr_ptr = write_ptr;
usleep_range(1000, 2000);
spin_lock_bh(&txq->lock);
overflow_tx = txq->overflow_tx ||
!skb_queue_empty(&txq->overflow_q);
spin_unlock_bh(&txq->lock);
}
if (txq->read_ptr != txq->write_ptr) {
IWL_ERR(trans,
"fail to flush all tx fifo queues Q %d\n", txq_idx);
iwl_trans_pcie_log_scd_error(trans, txq);
return -ETIMEDOUT;
}
IWL_DEBUG_TX_QUEUES(trans, "Queue %d is now empty.\n", txq_idx);
return 0;
}
static int iwl_trans_pcie_wait_txqs_empty(struct iwl_trans *trans, u32 txq_bm)
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
int cnt;
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;
if (!test_bit(cnt, trans_pcie->queue_used))
continue;
if (!(BIT(cnt) & txq_bm))
continue;
ret = iwl_trans_pcie_wait_txq_empty(trans, cnt);
if (ret)
break;
}
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 void iwl_trans_pcie_ref(struct iwl_trans *trans)
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
if (iwlwifi_mod_params.d0i3_disable)
return;
pm_runtime_get(&trans_pcie->pci_dev->dev);
#ifdef CONFIG_PM
IWL_DEBUG_RPM(trans, "runtime usage count: %d\n",
atomic_read(&trans_pcie->pci_dev->dev.power.usage_count));
#endif /* CONFIG_PM */
}
static void iwl_trans_pcie_unref(struct iwl_trans *trans)
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
if (iwlwifi_mod_params.d0i3_disable)
return;
pm_runtime_mark_last_busy(&trans_pcie->pci_dev->dev);
pm_runtime_put_autosuspend(&trans_pcie->pci_dev->dev);
#ifdef CONFIG_PM
IWL_DEBUG_RPM(trans, "runtime usage count: %d\n",
atomic_read(&trans_pcie->pci_dev->dev.power.usage_count));
#endif /* CONFIG_PM */
}
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;
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_memory)
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];
pos += scnprintf(buf + pos, bufsz - pos,
"hwq %.2d: read=%u write=%u use=%d stop=%d need_update=%d frozen=%d%s\n",
cnt, txq->read_ptr, txq->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);
char *buf;
int pos = 0, i, ret;
size_t bufsz = sizeof(buf);
bufsz = sizeof(char) * 121 * trans->num_rx_queues;
if (!trans_pcie->rxq)
return -EAGAIN;
buf = kzalloc(bufsz, GFP_KERNEL);
if (!buf)
return -ENOMEM;
for (i = 0; i < trans->num_rx_queues && pos < bufsz; i++) {
struct iwl_rxq *rxq = &trans_pcie->rxq[i];
pos += scnprintf(buf + pos, bufsz - pos, "queue#: %2d\n",
i);
pos += scnprintf(buf + pos, bufsz - pos, "\tread: %u\n",
rxq->read);
pos += scnprintf(buf + pos, bufsz - pos, "\twrite: %u\n",
rxq->write);
pos += scnprintf(buf + pos, bufsz - pos, "\twrite_actual: %u\n",
rxq->write_actual);
pos += scnprintf(buf + pos, bufsz - pos, "\tneed_update: %2d\n",
rxq->need_update);
pos += scnprintf(buf + pos, bufsz - pos, "\tfree_count: %u\n",
rxq->free_count);
if (rxq->rb_stts) {
u32 r = __le16_to_cpu(iwl_get_closed_rb_stts(trans,
rxq));
pos += scnprintf(buf + pos, bufsz - pos,
"\tclosed_rb_num: %u\n",
r & 0x0FFF);
} else {
pos += scnprintf(buf + pos, bufsz - pos,
"\tclosed_rb_num: Not Allocated\n");
}
}
ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
kfree(buf);
return ret;
}
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;
u32 reset_flag;
int ret;
ret = kstrtou32_from_user(user_buf, count, 16, &reset_flag);
if (ret)
return ret;
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;
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;
}
static ssize_t iwl_dbgfs_rfkill_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);
char buf[100];
int pos;
pos = scnprintf(buf, sizeof(buf), "debug: %d\nhw: %d\n",
trans_pcie->debug_rfkill,
!(iwl_read32(trans, CSR_GP_CNTRL) &
CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW));
return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
}
static ssize_t iwl_dbgfs_rfkill_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);
bool old = trans_pcie->debug_rfkill;
int ret;
ret = kstrtobool_from_user(user_buf, count, &trans_pcie->debug_rfkill);
if (ret)
return ret;
if (old == trans_pcie->debug_rfkill)
return count;
IWL_WARN(trans, "changing debug rfkill %d->%d\n",
old, trans_pcie->debug_rfkill);
iwl_pcie_handle_rfkill_irq(trans);
return count;
}
static int iwl_dbgfs_monitor_data_open(struct inode *inode,
struct file *file)
{
struct iwl_trans *trans = inode->i_private;
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
if (!trans->dbg_dest_tlv ||
trans->dbg_dest_tlv->monitor_mode != EXTERNAL_MODE) {
IWL_ERR(trans, "Debug destination is not set to DRAM\n");
return -ENOENT;
}
if (trans_pcie->fw_mon_data.state != IWL_FW_MON_DBGFS_STATE_CLOSED)
return -EBUSY;
trans_pcie->fw_mon_data.state = IWL_FW_MON_DBGFS_STATE_OPEN;
return simple_open(inode, file);
}
static int iwl_dbgfs_monitor_data_release(struct inode *inode,
struct file *file)
{
struct iwl_trans_pcie *trans_pcie =
IWL_TRANS_GET_PCIE_TRANS(inode->i_private);
if (trans_pcie->fw_mon_data.state == IWL_FW_MON_DBGFS_STATE_OPEN)
trans_pcie->fw_mon_data.state = IWL_FW_MON_DBGFS_STATE_CLOSED;
return 0;
}
static bool iwl_write_to_user_buf(char __user *user_buf, ssize_t count,
void *buf, ssize_t *size,
ssize_t *bytes_copied)
{
int buf_size_left = count - *bytes_copied;
buf_size_left = buf_size_left - (buf_size_left % sizeof(u32));
if (*size > buf_size_left)
*size = buf_size_left;
*size -= copy_to_user(user_buf, buf, *size);
*bytes_copied += *size;
if (buf_size_left == *size)
return true;
return false;
}
static ssize_t iwl_dbgfs_monitor_data_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);
void *cpu_addr = (void *)trans->fw_mon[0].block, *curr_buf;
struct cont_rec *data = &trans_pcie->fw_mon_data;
u32 write_ptr_addr, wrap_cnt_addr, write_ptr, wrap_cnt;
ssize_t size, bytes_copied = 0;
bool b_full;
if (trans->dbg_dest_tlv) {
write_ptr_addr =
le32_to_cpu(trans->dbg_dest_tlv->write_ptr_reg);
wrap_cnt_addr = le32_to_cpu(trans->dbg_dest_tlv->wrap_count);
} else {
write_ptr_addr = MON_BUFF_WRPTR;
wrap_cnt_addr = MON_BUFF_CYCLE_CNT;
}
if (unlikely(!trans->dbg_rec_on))
return 0;
mutex_lock(&data->mutex);
if (data->state ==
IWL_FW_MON_DBGFS_STATE_DISABLED) {
mutex_unlock(&data->mutex);
return 0;
}
/* write_ptr position in bytes rather then DW */
write_ptr = iwl_read_prph(trans, write_ptr_addr) * sizeof(u32);
wrap_cnt = iwl_read_prph(trans, wrap_cnt_addr);
if (data->prev_wrap_cnt == wrap_cnt) {
size = write_ptr - data->prev_wr_ptr;
curr_buf = cpu_addr + data->prev_wr_ptr;
b_full = iwl_write_to_user_buf(user_buf, count,
curr_buf, &size,
&bytes_copied);
data->prev_wr_ptr += size;
} else if (data->prev_wrap_cnt == wrap_cnt - 1 &&
write_ptr < data->prev_wr_ptr) {
size = trans->fw_mon[0].size - data->prev_wr_ptr;