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linux/drivers/accel/qaic/mhi_controller.c
Jeffrey Hugo 7271a88629 accel/qaic: Add AIC200 support 
Add basic support for the new AIC200 product. The PCIe Device ID is
0xa110. With this, we can turn on the lights for AIC200 by leveraging
much of the existing driver.

Co-developed-by: Youssef Samir <quic_yabdulra@quicinc.com>
Signed-off-by: Youssef Samir <quic_yabdulra@quicinc.com>
Signed-off-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Reviewed-by: Lizhi Hou <lizhi.hou@amd.com>
Acked-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20250117170943.2643280-8-quic_jhugo@quicinc.com
2025-01-31 10:08:45 -07:00

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// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (c) 2019-2021, The Linux Foundation. All rights reserved. */
/* Copyright (c) 2021-2023 Qualcomm Innovation Center, Inc. All rights reserved. */
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/memblock.h>
#include <linux/mhi.h>
#include <linux/moduleparam.h>
#include <linux/pci.h>
#include <linux/sizes.h>
#include "mhi_controller.h"
#include "qaic.h"
#define MAX_RESET_TIME_SEC 25
static unsigned int mhi_timeout_ms = 2000; /* 2 sec default */
module_param(mhi_timeout_ms, uint, 0600);
MODULE_PARM_DESC(mhi_timeout_ms, "MHI controller timeout value");
static const char *fw_image_paths[FAMILY_MAX] = {
[FAMILY_AIC100] = "qcom/aic100/sbl.bin",
[FAMILY_AIC200] = "qcom/aic200/sbl.bin",
};
static const struct mhi_channel_config aic100_channels[] = {
{
.name = "QAIC_LOOPBACK",
.num = 0,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_TO_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_LOOPBACK",
.num = 1,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_FROM_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_SAHARA",
.num = 2,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_TO_DEVICE,
.ee_mask = MHI_CH_EE_SBL,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_SAHARA",
.num = 3,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_FROM_DEVICE,
.ee_mask = MHI_CH_EE_SBL,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_DIAG",
.num = 4,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_TO_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_DIAG",
.num = 5,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_FROM_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_SSR",
.num = 6,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_TO_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_SSR",
.num = 7,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_FROM_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_QDSS",
.num = 8,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_TO_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_QDSS",
.num = 9,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_FROM_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_CONTROL",
.num = 10,
.num_elements = 128,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_TO_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_CONTROL",
.num = 11,
.num_elements = 128,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_FROM_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_LOGGING",
.num = 12,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_TO_DEVICE,
.ee_mask = MHI_CH_EE_SBL,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_LOGGING",
.num = 13,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_FROM_DEVICE,
.ee_mask = MHI_CH_EE_SBL,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_STATUS",
.num = 14,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_TO_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_STATUS",
.num = 15,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_FROM_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_TELEMETRY",
.num = 16,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_TO_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_TELEMETRY",
.num = 17,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_FROM_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_DEBUG",
.num = 18,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_TO_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_DEBUG",
.num = 19,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_FROM_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_TIMESYNC",
.num = 20,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_TO_DEVICE,
.ee_mask = MHI_CH_EE_SBL,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_TIMESYNC",
.num = 21,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_FROM_DEVICE,
.ee_mask = MHI_CH_EE_SBL,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_TIMESYNC_PERIODIC",
.num = 22,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_TO_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_TIMESYNC_PERIODIC",
.num = 23,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_FROM_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "IPCR",
.num = 24,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_TO_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "IPCR",
.num = 25,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_FROM_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = true,
.wake_capable = false,
},
};
static const struct mhi_channel_config aic200_channels[] = {
{
.name = "QAIC_LOOPBACK",
.num = 0,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_TO_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_LOOPBACK",
.num = 1,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_FROM_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_SAHARA",
.num = 2,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_TO_DEVICE,
.ee_mask = MHI_CH_EE_SBL,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_SAHARA",
.num = 3,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_FROM_DEVICE,
.ee_mask = MHI_CH_EE_SBL,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_SSR",
.num = 6,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_TO_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_SSR",
.num = 7,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_FROM_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_CONTROL",
.num = 10,
.num_elements = 128,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_TO_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_CONTROL",
.num = 11,
.num_elements = 128,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_FROM_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_LOGGING",
.num = 12,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_TO_DEVICE,
.ee_mask = MHI_CH_EE_SBL,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_LOGGING",
.num = 13,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_FROM_DEVICE,
.ee_mask = MHI_CH_EE_SBL,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_STATUS",
.num = 14,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_TO_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_STATUS",
.num = 15,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_FROM_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_TELEMETRY",
.num = 16,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_TO_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_TELEMETRY",
.num = 17,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_FROM_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_TIMESYNC_PERIODIC",
.num = 22,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_TO_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "QAIC_TIMESYNC_PERIODIC",
.num = 23,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_FROM_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "IPCR",
.num = 24,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_TO_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
.wake_capable = false,
},
{
.name = "IPCR",
.num = 25,
.num_elements = 32,
.local_elements = 0,
.event_ring = 0,
.dir = DMA_FROM_DEVICE,
.ee_mask = MHI_CH_EE_AMSS,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = true,
.wake_capable = false,
},
};
static struct mhi_event_config aic100_events[] = {
{
.num_elements = 32,
.irq_moderation_ms = 0,
.irq = 0,
.channel = U32_MAX,
.priority = 1,
.mode = MHI_DB_BRST_DISABLE,
.data_type = MHI_ER_CTRL,
.hardware_event = false,
.client_managed = false,
.offload_channel = false,
},
};
static struct mhi_event_config aic200_events[] = {
{
.num_elements = 32,
.irq_moderation_ms = 0,
.irq = 0,
.channel = U32_MAX,
.priority = 1,
.mode = MHI_DB_BRST_DISABLE,
.data_type = MHI_ER_CTRL,
.hardware_event = false,
.client_managed = false,
.offload_channel = false,
},
};
static struct mhi_controller_config mhi_cntrl_configs[] = {
[FAMILY_AIC100] = {
.max_channels = 128,
.timeout_ms = 0, /* controlled by mhi_timeout */
.buf_len = 0,
.num_channels = ARRAY_SIZE(aic100_channels),
.ch_cfg = aic100_channels,
.num_events = ARRAY_SIZE(aic100_events),
.event_cfg = aic100_events,
.use_bounce_buf = false,
.m2_no_db = false,
},
[FAMILY_AIC200] = {
.max_channels = 128,
.timeout_ms = 0, /* controlled by mhi_timeout */
.buf_len = 0,
.num_channels = ARRAY_SIZE(aic200_channels),
.ch_cfg = aic200_channels,
.num_events = ARRAY_SIZE(aic200_events),
.event_cfg = aic200_events,
.use_bounce_buf = false,
.m2_no_db = false,
},
};
static int mhi_read_reg(struct mhi_controller *mhi_cntrl, void __iomem *addr, u32 *out)
{
u32 tmp;
/*
* SOC_HW_VERSION quirk
* The SOC_HW_VERSION register (offset 0x224) is not reliable and
* may contain uninitialized values, including 0xFFFFFFFF. This could
* cause a false positive link down error. Instead, intercept any
* reads and provide the correct value of the register.
*/
if (addr - mhi_cntrl->regs == 0x224) {
*out = 0x60110200;
return 0;
}
tmp = readl_relaxed(addr);
if (tmp == U32_MAX)
return -EIO;
*out = tmp;
return 0;
}
static void mhi_write_reg(struct mhi_controller *mhi_cntrl, void __iomem *addr, u32 val)
{
writel_relaxed(val, addr);
}
static int mhi_runtime_get(struct mhi_controller *mhi_cntrl)
{
return 0;
}
static void mhi_runtime_put(struct mhi_controller *mhi_cntrl)
{
}
static void mhi_status_cb(struct mhi_controller *mhi_cntrl, enum mhi_callback reason)
{
struct qaic_device *qdev = pci_get_drvdata(to_pci_dev(mhi_cntrl->cntrl_dev));
/* this event occurs in atomic context */
if (reason == MHI_CB_FATAL_ERROR)
pci_err(qdev->pdev, "Fatal error received from device. Attempting to recover\n");
/* this event occurs in non-atomic context */
if (reason == MHI_CB_SYS_ERROR)
qaic_dev_reset_clean_local_state(qdev);
}
static int mhi_reset_and_async_power_up(struct mhi_controller *mhi_cntrl)
{
u8 time_sec = 1;
int current_ee;
int ret;
/* Reset the device to bring the device in PBL EE */
mhi_soc_reset(mhi_cntrl);
/*
* Keep checking the execution environment(EE) after every 1 second
* interval.
*/
do {
msleep(1000);
current_ee = mhi_get_exec_env(mhi_cntrl);
} while (current_ee != MHI_EE_PBL && time_sec++ <= MAX_RESET_TIME_SEC);
/* If the device is in PBL EE retry power up */
if (current_ee == MHI_EE_PBL)
ret = mhi_async_power_up(mhi_cntrl);
else
ret = -EIO;
return ret;
}
struct mhi_controller *qaic_mhi_register_controller(struct pci_dev *pci_dev, void __iomem *mhi_bar,
int mhi_irq, bool shared_msi, int family)
{
struct mhi_controller_config mhi_config = mhi_cntrl_configs[family];
struct mhi_controller *mhi_cntrl;
int ret;
mhi_cntrl = devm_kzalloc(&pci_dev->dev, sizeof(*mhi_cntrl), GFP_KERNEL);
if (!mhi_cntrl)
return ERR_PTR(-ENOMEM);
mhi_cntrl->cntrl_dev = &pci_dev->dev;
/*
* Covers the entire possible physical ram region. Remote side is
* going to calculate a size of this range, so subtract 1 to prevent
* rollover.
*/
mhi_cntrl->iova_start = 0;
mhi_cntrl->iova_stop = PHYS_ADDR_MAX - 1;
mhi_cntrl->status_cb = mhi_status_cb;
mhi_cntrl->runtime_get = mhi_runtime_get;
mhi_cntrl->runtime_put = mhi_runtime_put;
mhi_cntrl->read_reg = mhi_read_reg;
mhi_cntrl->write_reg = mhi_write_reg;
mhi_cntrl->regs = mhi_bar;
mhi_cntrl->reg_len = SZ_4K;
mhi_cntrl->nr_irqs = 1;
mhi_cntrl->irq = devm_kmalloc(&pci_dev->dev, sizeof(*mhi_cntrl->irq), GFP_KERNEL);
if (!mhi_cntrl->irq)
return ERR_PTR(-ENOMEM);
mhi_cntrl->irq[0] = mhi_irq;
if (shared_msi) /* MSI shared with data path, no IRQF_NO_SUSPEND */
mhi_cntrl->irq_flags = IRQF_SHARED;
mhi_cntrl->fw_image = fw_image_paths[family];
if (family == FAMILY_AIC200) {
mhi_cntrl->name = "AIC200";
mhi_cntrl->seg_len = SZ_512K;
} else {
mhi_cntrl->name = "AIC100";
}
/* use latest configured timeout */
mhi_config.timeout_ms = mhi_timeout_ms;
ret = mhi_register_controller(mhi_cntrl, &mhi_config);
if (ret) {
pci_err(pci_dev, "mhi_register_controller failed %d\n", ret);
return ERR_PTR(ret);
}
ret = mhi_prepare_for_power_up(mhi_cntrl);
if (ret) {
pci_err(pci_dev, "mhi_prepare_for_power_up failed %d\n", ret);
goto prepare_power_up_fail;
}
ret = mhi_async_power_up(mhi_cntrl);
/*
* If EIO is returned it is possible that device is in SBL EE, which is
* undesired. SOC reset the device and try to power up again.
*/
if (ret == -EIO && MHI_EE_SBL == mhi_get_exec_env(mhi_cntrl)) {
pci_err(pci_dev, "Found device in SBL at MHI init. Attempting a reset.\n");
ret = mhi_reset_and_async_power_up(mhi_cntrl);
}
if (ret) {
pci_err(pci_dev, "mhi_async_power_up failed %d\n", ret);
goto power_up_fail;
}
return mhi_cntrl;
power_up_fail:
mhi_unprepare_after_power_down(mhi_cntrl);
prepare_power_up_fail:
mhi_unregister_controller(mhi_cntrl);
return ERR_PTR(ret);
}
void qaic_mhi_free_controller(struct mhi_controller *mhi_cntrl, bool link_up)
{
mhi_power_down(mhi_cntrl, link_up);
mhi_unprepare_after_power_down(mhi_cntrl);
mhi_unregister_controller(mhi_cntrl);
}
void qaic_mhi_start_reset(struct mhi_controller *mhi_cntrl)
{
mhi_power_down(mhi_cntrl, true);
}
void qaic_mhi_reset_done(struct mhi_controller *mhi_cntrl)
{
struct pci_dev *pci_dev = container_of(mhi_cntrl->cntrl_dev, struct pci_dev, dev);
int ret;
ret = mhi_async_power_up(mhi_cntrl);
if (ret)
pci_err(pci_dev, "mhi_async_power_up failed after reset %d\n", ret);
}
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