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1e8dfafa84c8911cc2e1c2069febe32f27a0cdbc
nvethernetrm/osi/core/xpcs.h
Srinivas Ramachandran 1e8dfafa84 osi: Use osd_usleep vs osd_udelay appropriately 
Issue: osd_udelay is used irrespective of the
       duration of the delay/sleep. In certain
       environments like HVRTOS, udelay is a
       busy loop and it starves other tasks on the CPU.
Fix:   Use udelay only for small tight checks, and use
       usleep for larger delays.

Bug 4676601

Change-Id: I59d9a403f34d46c6e2d17ca6f7e8a277d5283db5
Signed-off-by: Srinivas Ramachandran <srinivasra@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/kernel/nvethernetrm/+/3176350
(cherry picked from commit c2abe16a34af853f86fcaa4bb91b7036e2a8eb79)
Reviewed-on: https://git-master.nvidia.com/r/c/kernel/nvethernetrm/+/3250083
Reviewed-by: Hareesh Kesireddy <hkesireddy@nvidia.com>
Reviewed-by: svcacv <svcacv@nvidia.com>
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
Tested-by: Hareesh Kesireddy <hkesireddy@nvidia.com>
2024-12-04 08:06:03 -08:00

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/* SPDX-License-Identifier: LicenseRef-NvidiaProprietary
* SPDX-FileCopyrightText: Copyright (c) 2020-2024 NVIDIA CORPORATION & AFFILIATES.
* All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#ifndef INCLUDED_XPCS_H_
#define INCLUDED_XPCS_H_
#include "core_local.h"
#include <osi_core.h>
/**
* @addtogroup XPCS Register offsets
*
* @brief XPCS register offsets
* @{
*/
#define XPCS_ADDRESS 0x03FC
#define XPCS_SR_XS_PCS_STS1 0xC0004
#define XPCS_SR_XS_PCS_CTRL2 0xC001C
#define XPCS_VR_XS_PCS_DIG_CTRL1 0xE0000
#define XPCS_VR_XS_PCS_KR_CTRL 0xE001C
#define XPCS_SR_AN_CTRL 0x1C0000
#define XPCS_SR_PMA_KR_FEC_CTRL 0x402ac
#define XPCS_SR_MII_CTRL 0x7C0000
#define XPCS_SR_MII_STS_0 0x7C0004
#define XPCS_VR_MII_AN_INTR_STS 0x7E0008
#define XPCS_VS_MII_MMD_VR_MII_AN_CTRL_0 0x7E0004
#define XPCS_WRAP_UPHY_HW_INIT_CTRL 0x8020
#define XPCS_WRAP_UPHY_STATUS 0x8044
#define XPCS_WRAP_UPHY_RX_CONTROL_0_0 0x801C
#define XPCS_WRAP_INTERRUPT_STATUS 0x8050
#define T26X_XPCS_WRAP_UPHY_HW_INIT_CTRL 0x8038
#define T26X_XPCS_WRAP_UPHY_STATUS 0x8080
#define T26X_XPCS_WRAP_INTERRUPT_STATUS 0x808C
#define T26X_XPCS_WRAP_CONFIG_0 0x8094
#define T26X_XPCS_WRAP_UPHY_T0_CTRL_2_0 0x8078
#define T26X_XPCS_WRAP_UPHY_RX_CTRL_5_0 0x804c
#define T26X_XPCS_WRAP_UPHY_RX_CTRL_4 0x8048
#define T26X_XPCS_WRAP_UPHY_TX_CTRL_1 0x8004
#define T26X_XPCS_WRAP_UPHY_RX_CTRL_1 0x803c
#define T26X_XPCS_WRAP_UPHY_RX_CTRL_P_DN_0 0x806c
#define T26X_XPCS_WRAP_UPHY_TX_CTRL_P_DN_0 0x8020
#define T26X_XPCS_WRAP_UPHY_TX_CTRL_P_DN_1 0x8024
#define T26X_XPCS_WRAP_UPHY_TX_CTRL_P_DN_2 0x8028
#define T26X_XPCS_WRAP_UPHY_TX_CTRL_P_DN_3 0x802c
#define T26X_XPCS_WRAP_UPHY_TX_CTRL_P_DN_4 0x8030
#define T26X_XPCS_WRAP_UPHY_TX_CTRL_4 0x8010
#define T26X_XPCS_WRAP_UPHY_TX_CTRL_5 0x8014
#define T26X_XPCS_WRAP_UPHY_RX_CTRL_7 0x805c
#define T26X_XPCS_WRAP_UPHY_RX_CTRL_8 0x8060
#define T26X_XPCS_WRAP_UPHY_RX_CTRL_9 0x8064
#define T26X_XPCS_WRAP_UPHY_TX_CTRL_3 0x800c
#define T26X_XPCS_WRAP_UPHY_TX_CTRL_2 0x8008
#define T26X_XPCS_WRAP_UPHY_RX_CTRL_2 0x8040
#define T26X_XPCS_WRAP_UPHY_RX_CTRL_3 0x8044
/** @} */
/**
* @addtogroup XLGPCS Register offsets
*
* @brief XLGPCS register offsets
* @{
*/
#define XLGPCS_SR_PMA_CTRL2 0x4001c
#define XLGPCS_SR_PCS_CTRL1 0xc0000
#define XLGPCS_SR_PCS_STS1 0xc0004
#define XLGPCS_SR_PCS_CTRL2 0xc001c
#define XLGPCS_VR_PCS_DIG_CTRL1 0xe0000
#define XLGPCS_VR_PCS_DIG_CTRL3 0xe000c
#define XLGPCS_SR_AN_CTRL 0x1c0000
/** @} */
/**
* @addtogroup XLGPCS-BIT Register bit fileds
*
* @brief XLGPCS register bit fields and values
* @{
*/
#define XLGPCS_SR_PCS_CTRL1_RST OSI_BIT(15)
#define XLGPCS_SR_AN_CTRL_AN_EN OSI_BIT(12)
#define XLGPCS_SR_PCS_STS1_RLU OSI_BIT(2)
#define XLGPCS_SR_PCS_CTRL1_SS5_2 OSI_BIT(2) | OSI_BIT(4)
#define XLGPCS_SR_PCS_CTRL1_SS5_2_MASK OSI_BIT(5) | OSI_BIT(4) | \
OSI_BIT(3) | OSI_BIT(2)
#define XLGPCS_SR_PCS_CTRL2_PCS_TYPE_SEL OSI_BIT(2) | OSI_BIT(1) | \
OSI_BIT(0)
#define XLGPCS_SR_PCS_CTRL2_PCS_TYPE_SEL_MASK OSI_BIT(3) | OSI_BIT(2) | \
OSI_BIT(1) | OSI_BIT(0)
#define XLGPCS_SR_PMA_CTRL2_PMA_TYPE OSI_BIT(5) | OSI_BIT(4) | \
OSI_BIT(3) | OSI_BIT(0)
#define XLGPCS_SR_PMA_CTRL2_PMA_TYPE_MASK 0x7F
#define XLGPCS_VR_PCS_DIG_CTRL3_CNS_EN OSI_BIT(0)
#define XLGPCS_VR_PCS_DIG_CTRL1_VR_RST OSI_BIT(15)
#define XLGPCS_WRAP_UPHY_TO_CTRL2_EQ_DONE_TOV 0xFFFFU
#define XLGPCS_WRAP_UPHY_RX_CTRL5_RX_EQ_ENABLE 0x80000000U
#define XPCS_WRAP_UPHY_RX_CTRL_4_CDR_RESET_WIDTH 0x21U
#define XPCS_WRAP_UPHY_TX_CTRL_1_IDDQ_SLEEP_DLY 0x29U
#define XPCS_WRAP_UPHY_RX_CTRL_P_DN_0_RXEN_SLEEP_DLY 0xFFFF0000U
#define XPCS_WRAP_UPHY_RX_CTRL_P_DN_0_SLEEP_IDDQ_DLY 0xA1U
#define XPCS_WRAP_UPHY_TX_CTRL_P_DN_0_DATARDY_SLEEP_DLY 0x29U
#define XPCS_WRAP_UPHY_TX_CTRL_P_DN_1_DATAEN_RDY_DLY 0x81U
#define XPCS_WRAP_UPHY_TX_CTRL_P_DN_2_SLEEP_IDDQ_DLY 0xA1U
#define XPCS_WRAP_UPHY_TX_CTRL_P_DN_3_IDDQ_P_DN_DLY 0x285U
#define XPCS_WRAP_UPHY_TX_CTRL_P_DN_4_CAL_DONE_SLP_DLY 0x29U
#define XPCS_WRAP_UPHY_TX_CTRL_4_CAL_EN_HIGH_LOW_DLY 0x19U
#define XPCS_WRAP_UPHY_TX_CTRL_5_CAL_EN_LOW_DTRDY_DLY 0x79U
#define XPCS_WRAP_UPHY_RX_CTRL_7_EQ_RESET_WIDTH 0x29U
#define XPCS_WRAP_UPHY_RX_CTRL_8_EQ_TRAIN_EN_DELAY 0x29U
#define XPCS_WRAP_UPHY_RX_CTRL_9_EQ_TRAIN_EN_HILO_DLY 0x19U
#define XPCS_WRAP_UPHY_TX_CTRL_3_DATAREADY_DATAEN_DLY 0x82U
#define XPCS_WRAP_UPHY_RX_CTRL_2_SLEEP_CAL_EN_DLY 0xFBDU
#define XPCS_WRAP_UPHY_RX_CTRL_3_CAL_DONE_DATA_EN_DLY 0x78U
#define EQOS_XPCS_WRAP_UPHY_HW_INIT_CTRL 0x8038
#define EQOS_XPCS_WRAP_UPHY_STATUS 0x8064
#define EQOS_XPCS_WRAP_UPHY_INTERRUPT_STATUS 0x8070
/** @} */
#ifndef OSI_STRIPPED_LIB
#define XPCS_VR_XS_PCS_EEE_MCTRL0 0xE0018
#define XPCS_VR_XS_PCS_EEE_MCTRL1 0xE002C
#define XLGPCS_VR_PCS_EEE_MCTRL 0xe0018
#define XLGPCS_VR_PCS_DIG_STS 0xe0040
#define XPCS_VR_XS_PCS_EEE_MCTRL1_TRN_LPI OSI_BIT(0)
#define XPCS_VR_XS_PCS_EEE_MCTRL0_LTX_EN OSI_BIT(0)
#define XPCS_VR_XS_PCS_EEE_MCTRL0_LRX_EN OSI_BIT(1)
#define XLGPCS_VR_PCS_DIG_STSLTXRX_STATE (OSI_BIT(15) | OSI_BIT(14) | \
OSI_BIT(13) | OSI_BIT(12) | \
OSI_BIT(11) | OSI_BIT(10))
#endif /* !OSI_STRIPPED_LIB */
/**
* @addtogroup XPCS-BIT Register bit fileds
*
* @brief XPCS register bit fields
* @{
*/
#define XPCS_SR_XS_PCS_CTRL2_PCS_TYPE_SEL_BASE_R 0x0U
#define XPCS_SR_XS_PCS_STS1_RLU OSI_BIT(2)
#define XPCS_SR_XS_PCS_STS1_FLT OSI_BIT(7)
#define XPCS_VR_XS_PCS_DIG_CTRL1_USXG_EN OSI_BIT(9)
#define XPCS_VR_XS_PCS_DIG_CTRL1_VR_RST OSI_BIT(15)
#define XPCS_VR_XS_PCS_DIG_CTRL1_USRA_RST OSI_BIT(10)
#define XPCS_VR_XS_PCS_DIG_CTRL1_CL37_BP OSI_BIT(12)
#define XPCS_VS_MII_MMD_VR_MII_AN_CTRL_PCS_MODE OSI_BIT(2)
#define XPCS_VS_MII_MMD_VR_MII_AN_CTRL_AN_INTR_EN OSI_BIT(0)
#define XPCS_SR_AN_CTRL_AN_EN OSI_BIT(12)
#define XPCS_SR_MII_CTRL_RESTART_AN OSI_BIT(9)
#define XPCS_SR_MII_CTRL_AN_ENABLE OSI_BIT(12)
#define XPCS_SR_MII_CTRL_RST OSI_BIT(15)
#define XPCS_SR_MII_STS_0_LINK_STS OSI_BIT(2)
#define XPCS_VR_MII_AN_INTR_STS_CL37_ANCMPLT_INTR OSI_BIT(0)
#define EQOS_XPCS_VR_MII_AN_INTR_STS_LINK_UP OSI_BIT(4)
#define XPCS_SR_MII_CTRL_SS5 OSI_BIT(5)
#define XPCS_SR_MII_CTRL_SS6 OSI_BIT(6)
#define XPCS_SR_MII_CTRL_SS13 OSI_BIT(13)
#define XPCS_USXG_AN_STS_SPEED_MASK 0x1C00U
#define EQOS_XPCS_VR_MII_AN_STS_SPEED_MASK 0xCU
#define XPCS_USXG_AN_STS_SPEED_10 0x0U
#define XPCS_USXG_AN_STS_SPEED_100 0x4U
#define XPCS_USXG_AN_STS_SPEED_1000 0x8U
#define XPCS_USXG_AN_STS_SPEED_2500 0x1000U
#define XPCS_USXG_AN_STS_SPEED_5000 0x1400U
#define XPCS_USXG_AN_STS_SPEED_10000 0xC00U
#define XPCS_REG_ADDR_SHIFT 10U
#define XPCS_REG_ADDR_MASK 0x1FFFU
#define XPCS_REG_VALUE_MASK 0x3FFU
#define XPCS_VR_XS_PCS_KR_CTRL_USXG_MODE_MASK (OSI_BIT(12) | \
OSI_BIT(11) | \
OSI_BIT(10))
#define XPCS_VR_XS_PCS_KR_CTRL_USXG_MODE_5G OSI_BIT(10)
#define XPCS_WRAP_UPHY_HW_INIT_CTRL_TX_EN OSI_BIT(0)
#define XPCS_WRAP_UPHY_HW_INIT_CTRL_RX_EN OSI_BIT(2)
#define XPCS_WRAP_IRQ_STATUS_PCS_LINK_STS OSI_BIT(6)
#define XPCS_WRAP_UPHY_RX_CONTROL_0_0_RX_DATA_EN OSI_BIT(0)
#define XPCS_WRAP_UPHY_RX_CONTROL_0_0_RX_IDDQ OSI_BIT(4)
#define XPCS_WRAP_UPHY_RX_CONTROL_0_0_AUX_RX_IDDQ OSI_BIT(5)
#define XPCS_WRAP_UPHY_RX_CONTROL_0_0_RX_SLEEP (OSI_BIT(6) | \
OSI_BIT(7))
#define XPCS_WRAP_UPHY_RX_CONTROL_0_0_RX_CAL_EN OSI_BIT(8)
#define XPCS_WRAP_UPHY_RX_CONTROL_0_0_RX_CDR_RESET OSI_BIT(9)
#define XPCS_WRAP_UPHY_RX_CONTROL_0_0_RX_PCS_PHY_RDY OSI_BIT(10)
#define XPCS_WRAP_UPHY_RX_CONTROL_0_0_RX_SW_OVRD OSI_BIT(31)
#define XPCS_WRAP_UPHY_STATUS_TX_P_UP_STATUS OSI_BIT(0)
#define XPCS_WRAP_UPHY_STATUS_RX_P_UP_STATUS OSI_BIT(2)
#define XPCS_SR_PMA_KR_FEC_CTRL_FEC_EN OSI_BIT(0)
#define XPCS_SR_PMA_KR_FEC_CTRL_EN_ERR_IND OSI_BIT(1)
#ifdef HSI_SUPPORT
#define XPCS_WRAP_INTERRUPT_CONTROL 0x8048
#define T26X_XPCS_WRAP_INTERRUPT_CONTROL 0x8084
#define XPCS_CORE_CORRECTABLE_ERR OSI_BIT(10)
#define XPCS_CORE_UNCORRECTABLE_ERR OSI_BIT(9)
#define XPCS_REGISTER_PARITY_ERR OSI_BIT(8)
#define XPCS_VR_XS_PCS_SFTY_UE_INTR0 0xE03C0
#define XPCS_VR_XS_PCS_SFTY_CE_INTR 0xE03C8
#define XPCS_VR_XS_PCS_SFTY_TMR_CTRL 0xE03D4
#define XPCS_SFTY_1US_MULT_MASK 0xFFU
#define XPCS_SFTY_1US_MULT_SHIFT 0U
#define XPCS_FSM_TO_SEL_SHIFT 10U
#define XPCS_FSM_TO_SEL_MASK 0xC00U
#endif
/** @} */
nve32_t xpcs_init(struct osi_core_priv_data *osi_core);
nve32_t xpcs_start(struct osi_core_priv_data *osi_core);
nve32_t xlgpcs_init(struct osi_core_priv_data *osi_core);
nve32_t xlgpcs_start(struct osi_core_priv_data *osi_core);
#ifndef OSI_STRIPPED_LIB
nve32_t xpcs_eee(struct osi_core_priv_data *osi_core, nveu32_t en_dis);
nve32_t xlgpcs_eee(struct osi_core_priv_data *osi_core, nveu32_t en_dis);
#endif /* !OSI_STRIPPED_LIB */
nve32_t eqos_xpcs_init(struct osi_core_priv_data *osi_core);
/**
* @brief xpcs_read - read from xpcs.
*
* Algorithm: This routine reads data from XPCS register.
*
* @param[in] xpcs_base: XPCS virtual base address
* @param[in] reg_addr: register address to be read
*
* @retval value read from xpcs register.
*/
static inline nveu32_t xpcs_read(void *xpcs_base, nveu32_t reg_addr)
{
osi_writel(((reg_addr >> XPCS_REG_ADDR_SHIFT) & XPCS_REG_ADDR_MASK),
((nveu8_t *)xpcs_base + XPCS_ADDRESS));
return osi_readl((nveu8_t *)xpcs_base +
((reg_addr) & XPCS_REG_VALUE_MASK));
}
/**
* @brief xpcs_write - write to xpcs.
*
* Algorithm: This routine writes data to XPCS register.
*
* @param[in] xpcs_base: XPCS virtual base address
* @param[in] reg_addr: register address for writing
* @param[in] val: write value to register address
*/
static inline void xpcs_write(void *xpcs_base, nveu32_t reg_addr,
nveu32_t val)
{
osi_writel(((reg_addr >> XPCS_REG_ADDR_SHIFT) & XPCS_REG_ADDR_MASK),
((nveu8_t *)xpcs_base + XPCS_ADDRESS));
osi_writel(val, (nveu8_t *)xpcs_base +
(((reg_addr) & XPCS_REG_VALUE_MASK)));
}
/**
* @brief xpcs_write_safety - write to xpcs.
*
* Algorithm: This routine writes data to XPCS register.
* And verifiy by reading back the value
*
* @param[in] osi_core: OSI core data structure
* @param[in] reg_addr: register address for writing
* @param[in] val: write value to register address
*
* @retval 0 on success
* @retval XPCS_WRITE_FAIL_CODE on failure
*
*/
static inline nve32_t xpcs_write_safety(struct osi_core_priv_data *osi_core,
nveu32_t reg_addr,
nveu32_t val)
{
void *xpcs_base = osi_core->xpcs_base;
nveu32_t read_val;
/* 1 busy wait, and the remaining retries are sleeps of granularity MIN_USLEEP_10US */
nveu32_t retry = RETRY_ONCE;
nveu32_t count = 0;
nveu32_t once = 0U;
nve32_t ret = XPCS_WRITE_FAIL_CODE;
nve32_t cond = COND_NOT_MET;
while (cond == COND_NOT_MET) {
xpcs_write(xpcs_base, reg_addr, val);
read_val = xpcs_read(xpcs_base, reg_addr);
if (val == read_val) {
ret = 0;
cond = COND_MET;
} else {
if (count > retry) {
break;
}
count++;
if (once == 0U) {
osi_core->osd_ops.udelay(OSI_DELAY_1US);
/* udelay is a busy wait, so don't call it too frequently.
* call it once to be optimistic, and then use usleep with
* a longer timeout to yield to other CPU users.
*/
once = 1U;
} else {
osi_core->osd_ops.usleep_range(MIN_USLEEP_10US,
MIN_USLEEP_10US + MIN_USLEEP_10US);
}
}
}
#ifndef OSI_STRIPPED_LIB
if (ret != 0) {
OSI_CORE_ERR(osi_core->osd, OSI_LOG_ARG_HW_FAIL,
"xpcs_write_safety failed", reg_addr);
}
#endif /* !OSI_STRIPPED_LIB */
return ret;
}
#endif /* INCLUDED_XPCS_H_ */
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