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// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/*
* Copyright (C) 2003-2014, 2018-2020 Intel Corporation
* Copyright (C) 2015-2016 Intel Deutschland GmbH
*/
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/export.h>
#include "iwl-drv.h"
#include "iwl-io.h"
#include "iwl-csr.h"
#include "iwl-debug.h"
#include "iwl-prph.h"
#include "iwl-fh.h"
void iwl_write8(struct iwl_trans *trans, u32 ofs, u8 val)
{
trace_iwlwifi_dev_iowrite8(trans->dev, ofs, val);
iwl_trans_write8(trans, ofs, val);
}
IWL_EXPORT_SYMBOL(iwl_write8);
void iwl_write32(struct iwl_trans *trans, u32 ofs, u32 val)
{
trace_iwlwifi_dev_iowrite32(trans->dev, ofs, val);
iwl_trans_write32(trans, ofs, val);
}
IWL_EXPORT_SYMBOL(iwl_write32);
void iwl_write64(struct iwl_trans *trans, u64 ofs, u64 val)
{
trace_iwlwifi_dev_iowrite64(trans->dev, ofs, val);
iwl_trans_write32(trans, ofs, lower_32_bits(val));
iwl_trans_write32(trans, ofs + 4, upper_32_bits(val));
}
IWL_EXPORT_SYMBOL(iwl_write64);
u32 iwl_read32(struct iwl_trans *trans, u32 ofs)
{
u32 val = iwl_trans_read32(trans, ofs);
trace_iwlwifi_dev_ioread32(trans->dev, ofs, val);
return val;
}
IWL_EXPORT_SYMBOL(iwl_read32);
#define IWL_POLL_INTERVAL 10 /* microseconds */
int iwl_poll_bit(struct iwl_trans *trans, u32 addr,
u32 bits, u32 mask, int timeout)
{
int t = 0;
do {
if ((iwl_read32(trans, addr) & mask) == (bits & mask))
return t;
udelay(IWL_POLL_INTERVAL);
t += IWL_POLL_INTERVAL;
} while (t < timeout);
return -ETIMEDOUT;
}
IWL_EXPORT_SYMBOL(iwl_poll_bit);
u32 iwl_read_direct32(struct iwl_trans *trans, u32 reg)
{
u32 value = 0x5a5a5a5a;
unsigned long flags;
if (iwl_trans_grab_nic_access(trans, &flags)) {
value = iwl_read32(trans, reg);
iwl_trans_release_nic_access(trans, &flags);
}
return value;
}
IWL_EXPORT_SYMBOL(iwl_read_direct32);
void iwl_write_direct32(struct iwl_trans *trans, u32 reg, u32 value)
{
unsigned long flags;
if (iwl_trans_grab_nic_access(trans, &flags)) {
iwl_write32(trans, reg, value);
iwl_trans_release_nic_access(trans, &flags);
}
}
IWL_EXPORT_SYMBOL(iwl_write_direct32);
void iwl_write_direct64(struct iwl_trans *trans, u64 reg, u64 value)
{
unsigned long flags;
if (iwl_trans_grab_nic_access(trans, &flags)) {
iwl_write64(trans, reg, value);
iwl_trans_release_nic_access(trans, &flags);
}
}
IWL_EXPORT_SYMBOL(iwl_write_direct64);
int iwl_poll_direct_bit(struct iwl_trans *trans, u32 addr, u32 mask,
int timeout)
{
int t = 0;
do {
if ((iwl_read_direct32(trans, addr) & mask) == mask)
return t;
udelay(IWL_POLL_INTERVAL);
t += IWL_POLL_INTERVAL;
} while (t < timeout);
return -ETIMEDOUT;
}
IWL_EXPORT_SYMBOL(iwl_poll_direct_bit);
u32 iwl_read_prph_no_grab(struct iwl_trans *trans, u32 ofs)
{
u32 val = iwl_trans_read_prph(trans, ofs);
trace_iwlwifi_dev_ioread_prph32(trans->dev, ofs, val);
return val;
}
IWL_EXPORT_SYMBOL(iwl_read_prph_no_grab);
void iwl_write_prph_no_grab(struct iwl_trans *trans, u32 ofs, u32 val)
{
trace_iwlwifi_dev_iowrite_prph32(trans->dev, ofs, val);
iwl_trans_write_prph(trans, ofs, val);
}
IWL_EXPORT_SYMBOL(iwl_write_prph_no_grab);
void iwl_write_prph64_no_grab(struct iwl_trans *trans, u64 ofs, u64 val)
{
trace_iwlwifi_dev_iowrite_prph64(trans->dev, ofs, val);
iwl_write_prph_no_grab(trans, ofs, val & 0xffffffff);
iwl_write_prph_no_grab(trans, ofs + 4, val >> 32);
}
IWL_EXPORT_SYMBOL(iwl_write_prph64_no_grab);
u32 iwl_read_prph(struct iwl_trans *trans, u32 ofs)
{
unsigned long flags;
u32 val = 0x5a5a5a5a;
if (iwl_trans_grab_nic_access(trans, &flags)) {
val = iwl_read_prph_no_grab(trans, ofs);
iwl_trans_release_nic_access(trans, &flags);
}
return val;
}
IWL_EXPORT_SYMBOL(iwl_read_prph);
void iwl_write_prph(struct iwl_trans *trans, u32 ofs, u32 val)
{
unsigned long flags;
if (iwl_trans_grab_nic_access(trans, &flags)) {
iwl_write_prph_no_grab(trans, ofs, val);
iwl_trans_release_nic_access(trans, &flags);
}
}
IWL_EXPORT_SYMBOL(iwl_write_prph);
int iwl_poll_prph_bit(struct iwl_trans *trans, u32 addr,
u32 bits, u32 mask, int timeout)
{
int t = 0;
do {
if ((iwl_read_prph(trans, addr) & mask) == (bits & mask))
return t;
udelay(IWL_POLL_INTERVAL);
t += IWL_POLL_INTERVAL;
} while (t < timeout);
return -ETIMEDOUT;
}
void iwl_set_bits_prph(struct iwl_trans *trans, u32 ofs, u32 mask)
{
unsigned long flags;
if (iwl_trans_grab_nic_access(trans, &flags)) {
iwl_write_prph_no_grab(trans, ofs,
iwl_read_prph_no_grab(trans, ofs) |
mask);
iwl_trans_release_nic_access(trans, &flags);
}
}
IWL_EXPORT_SYMBOL(iwl_set_bits_prph);
void iwl_set_bits_mask_prph(struct iwl_trans *trans, u32 ofs,
u32 bits, u32 mask)
{
unsigned long flags;
if (iwl_trans_grab_nic_access(trans, &flags)) {
iwl_write_prph_no_grab(trans, ofs,
(iwl_read_prph_no_grab(trans, ofs) &
mask) | bits);
iwl_trans_release_nic_access(trans, &flags);
}
}
IWL_EXPORT_SYMBOL(iwl_set_bits_mask_prph);
void iwl_clear_bits_prph(struct iwl_trans *trans, u32 ofs, u32 mask)
{
unsigned long flags;
u32 val;
if (iwl_trans_grab_nic_access(trans, &flags)) {
val = iwl_read_prph_no_grab(trans, ofs);
iwl_write_prph_no_grab(trans, ofs, (val & ~mask));
iwl_trans_release_nic_access(trans, &flags);
}
}
IWL_EXPORT_SYMBOL(iwl_clear_bits_prph);
void iwl_force_nmi(struct iwl_trans *trans)
{
if (trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_9000)
iwl_write_prph(trans, DEVICE_SET_NMI_REG,
DEVICE_SET_NMI_VAL_DRV);
else if (trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_AX210)
iwl_write_umac_prph(trans, UREG_NIC_SET_NMI_DRIVER,
UREG_NIC_SET_NMI_DRIVER_NMI_FROM_DRIVER);
else
iwl_write_umac_prph(trans, UREG_DOORBELL_TO_ISR6,
UREG_DOORBELL_TO_ISR6_NMI_BIT);
}
IWL_EXPORT_SYMBOL(iwl_force_nmi);
static const char *get_rfh_string(int cmd)
{
#define IWL_CMD(x) case x: return #x
#define IWL_CMD_MQ(arg, reg, q) { if (arg == reg(q)) return #reg; }
int i;
for (i = 0; i < IWL_MAX_RX_HW_QUEUES; i++) {
IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_BA_LSB, i);
IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_WIDX, i);
IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_RIDX, i);
IWL_CMD_MQ(cmd, RFH_Q_URBD_STTS_WPTR_LSB, i);
}
switch (cmd) {
IWL_CMD(RFH_RXF_DMA_CFG);
IWL_CMD(RFH_GEN_CFG);
IWL_CMD(RFH_GEN_STATUS);
IWL_CMD(FH_TSSR_TX_STATUS_REG);
IWL_CMD(FH_TSSR_TX_ERROR_REG);
default:
return "UNKNOWN";
}
#undef IWL_CMD_MQ
}
struct reg {
u32 addr;
bool is64;
};
static int iwl_dump_rfh(struct iwl_trans *trans, char **buf)
{
int i, q;
int num_q = trans->num_rx_queues;
static const u32 rfh_tbl[] = {
RFH_RXF_DMA_CFG,
RFH_GEN_CFG,
RFH_GEN_STATUS,
FH_TSSR_TX_STATUS_REG,
FH_TSSR_TX_ERROR_REG,
};
static const struct reg rfh_mq_tbl[] = {
{ RFH_Q0_FRBDCB_BA_LSB, true },
{ RFH_Q0_FRBDCB_WIDX, false },
{ RFH_Q0_FRBDCB_RIDX, false },
{ RFH_Q0_URBD_STTS_WPTR_LSB, true },
};
#ifdef CONFIG_IWLWIFI_DEBUGFS
if (buf) {
int pos = 0;
/*
* Register (up to 34 for name + 8 blank/q for MQ): 40 chars
* Colon + space: 2 characters
* 0X%08x: 10 characters
* New line: 1 character
* Total of 53 characters
*/
size_t bufsz = ARRAY_SIZE(rfh_tbl) * 53 +
ARRAY_SIZE(rfh_mq_tbl) * 53 * num_q + 40;
*buf = kmalloc(bufsz, GFP_KERNEL);
if (!*buf)
return -ENOMEM;
pos += scnprintf(*buf + pos, bufsz - pos,
"RFH register values:\n");
for (i = 0; i < ARRAY_SIZE(rfh_tbl); i++)
pos += scnprintf(*buf + pos, bufsz - pos,
"%40s: 0X%08x\n",
get_rfh_string(rfh_tbl[i]),
iwl_read_prph(trans, rfh_tbl[i]));
for (i = 0; i < ARRAY_SIZE(rfh_mq_tbl); i++)
for (q = 0; q < num_q; q++) {
u32 addr = rfh_mq_tbl[i].addr;
addr += q * (rfh_mq_tbl[i].is64 ? 8 : 4);
pos += scnprintf(*buf + pos, bufsz - pos,
"%34s(q %2d): 0X%08x\n",
get_rfh_string(addr), q,
iwl_read_prph(trans, addr));
}
return pos;
}
#endif
IWL_ERR(trans, "RFH register values:\n");
for (i = 0; i < ARRAY_SIZE(rfh_tbl); i++)
IWL_ERR(trans, " %34s: 0X%08x\n",
get_rfh_string(rfh_tbl[i]),
iwl_read_prph(trans, rfh_tbl[i]));
for (i = 0; i < ARRAY_SIZE(rfh_mq_tbl); i++)
for (q = 0; q < num_q; q++) {
u32 addr = rfh_mq_tbl[i].addr;
addr += q * (rfh_mq_tbl[i].is64 ? 8 : 4);
IWL_ERR(trans, " %34s(q %d): 0X%08x\n",
get_rfh_string(addr), q,
iwl_read_prph(trans, addr));
}
return 0;
}
static const char *get_fh_string(int cmd)
{
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_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
};
if (trans->trans_cfg->mq_rx_supported)
return iwl_dump_rfh(trans, buf);
#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;
}
int iwl_finish_nic_init(struct iwl_trans *trans,
const struct iwl_cfg_trans_params *cfg_trans)
{
int err;
if (cfg_trans->bisr_workaround) {
/* ensure the TOP FSM isn't still in previous reset */
mdelay(2);
}
/*
* 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);
if (cfg_trans->device_family == IWL_DEVICE_FAMILY_8000)
udelay(2);
/*
* Wait for clock stabilization; once stabilized, access to
* device-internal resources is supported, e.g. iwl_write_prph()
* and accesses to uCode SRAM.
*/
err = 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 (err < 0)
IWL_DEBUG_INFO(trans, "Failed to wake NIC\n");
if (cfg_trans->bisr_workaround) {
/* ensure BISR shift has finished */
udelay(200);
}
return err < 0 ? err : 0;
}
IWL_EXPORT_SYMBOL(iwl_finish_nic_init);
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