blob: 6835c14b82cc9570399698c4c4efd65a0a72b7bd [file] [log] [blame]
// SPDX-License-Identifier: BSD-3-Clause-Clear
/*
* Copyright (c) 2020 The Linux Foundation. All rights reserved.
* Copyright (c) 2021-2023 Qualcomm Innovation Center, Inc. All rights reserved.
*/
#include <linux/msi.h>
#include <linux/pci.h>
#include <linux/firmware.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/ioport.h>
#include "core.h"
#include "debug.h"
#include "mhi.h"
#include "pci.h"
#include "pcic.h"
#define MHI_TIMEOUT_DEFAULT_MS 20000
#define RDDM_DUMP_SIZE 0x420000
static struct mhi_channel_config ath11k_mhi_channels_qca6390[] = {
{
.num = 0,
.name = "LOOPBACK",
.num_elements = 32,
.event_ring = 0,
.dir = DMA_TO_DEVICE,
.ee_mask = 0x4,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
},
{
.num = 1,
.name = "LOOPBACK",
.num_elements = 32,
.event_ring = 0,
.dir = DMA_FROM_DEVICE,
.ee_mask = 0x4,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
},
{
.num = 20,
.name = "IPCR",
.num_elements = 64,
.event_ring = 1,
.dir = DMA_TO_DEVICE,
.ee_mask = 0x4,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
},
{
.num = 21,
.name = "IPCR",
.num_elements = 64,
.event_ring = 1,
.dir = DMA_FROM_DEVICE,
.ee_mask = 0x4,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = true,
},
};
static struct mhi_event_config ath11k_mhi_events_qca6390[] = {
{
.num_elements = 32,
.irq_moderation_ms = 0,
.irq = 1,
.mode = MHI_DB_BRST_DISABLE,
.data_type = MHI_ER_CTRL,
.hardware_event = false,
.client_managed = false,
.offload_channel = false,
},
{
.num_elements = 256,
.irq_moderation_ms = 1,
.irq = 2,
.mode = MHI_DB_BRST_DISABLE,
.priority = 1,
.hardware_event = false,
.client_managed = false,
.offload_channel = false,
},
};
static struct mhi_controller_config ath11k_mhi_config_qca6390 = {
.max_channels = 128,
.timeout_ms = 2000,
.use_bounce_buf = false,
.buf_len = 0,
.num_channels = ARRAY_SIZE(ath11k_mhi_channels_qca6390),
.ch_cfg = ath11k_mhi_channels_qca6390,
.num_events = ARRAY_SIZE(ath11k_mhi_events_qca6390),
.event_cfg = ath11k_mhi_events_qca6390,
};
static struct mhi_channel_config ath11k_mhi_channels_qcn9074[] = {
{
.num = 0,
.name = "LOOPBACK",
.num_elements = 32,
.event_ring = 1,
.dir = DMA_TO_DEVICE,
.ee_mask = 0x14,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
},
{
.num = 1,
.name = "LOOPBACK",
.num_elements = 32,
.event_ring = 1,
.dir = DMA_FROM_DEVICE,
.ee_mask = 0x14,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
},
{
.num = 20,
.name = "IPCR",
.num_elements = 32,
.event_ring = 1,
.dir = DMA_TO_DEVICE,
.ee_mask = 0x14,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
},
{
.num = 21,
.name = "IPCR",
.num_elements = 32,
.event_ring = 1,
.dir = DMA_FROM_DEVICE,
.ee_mask = 0x14,
.pollcfg = 0,
.doorbell = MHI_DB_BRST_DISABLE,
.lpm_notify = false,
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = true,
},
};
static struct mhi_event_config ath11k_mhi_events_qcn9074[] = {
{
.num_elements = 32,
.irq_moderation_ms = 0,
.irq = 1,
.data_type = MHI_ER_CTRL,
.mode = MHI_DB_BRST_DISABLE,
.hardware_event = false,
.client_managed = false,
.offload_channel = false,
},
{
.num_elements = 256,
.irq_moderation_ms = 1,
.irq = 2,
.mode = MHI_DB_BRST_DISABLE,
.priority = 1,
.hardware_event = false,
.client_managed = false,
.offload_channel = false,
},
};
static struct mhi_controller_config ath11k_mhi_config_qcn9074 = {
.max_channels = 30,
.timeout_ms = 10000,
.use_bounce_buf = false,
.buf_len = 0,
.num_channels = ARRAY_SIZE(ath11k_mhi_channels_qcn9074),
.ch_cfg = ath11k_mhi_channels_qcn9074,
.num_events = ARRAY_SIZE(ath11k_mhi_events_qcn9074),
.event_cfg = ath11k_mhi_events_qcn9074,
};
void ath11k_mhi_set_mhictrl_reset(struct ath11k_base *ab)
{
u32 val;
val = ath11k_pcic_read32(ab, MHISTATUS);
ath11k_dbg(ab, ATH11K_DBG_PCI, "mhistatus 0x%x\n", val);
/* Observed on QCA6390 that after SOC_GLOBAL_RESET, MHISTATUS
* has SYSERR bit set and thus need to set MHICTRL_RESET
* to clear SYSERR.
*/
ath11k_pcic_write32(ab, MHICTRL, MHICTRL_RESET_MASK);
mdelay(10);
}
static void ath11k_mhi_reset_txvecdb(struct ath11k_base *ab)
{
ath11k_pcic_write32(ab, PCIE_TXVECDB, 0);
}
static void ath11k_mhi_reset_txvecstatus(struct ath11k_base *ab)
{
ath11k_pcic_write32(ab, PCIE_TXVECSTATUS, 0);
}
static void ath11k_mhi_reset_rxvecdb(struct ath11k_base *ab)
{
ath11k_pcic_write32(ab, PCIE_RXVECDB, 0);
}
static void ath11k_mhi_reset_rxvecstatus(struct ath11k_base *ab)
{
ath11k_pcic_write32(ab, PCIE_RXVECSTATUS, 0);
}
void ath11k_mhi_clear_vector(struct ath11k_base *ab)
{
ath11k_mhi_reset_txvecdb(ab);
ath11k_mhi_reset_txvecstatus(ab);
ath11k_mhi_reset_rxvecdb(ab);
ath11k_mhi_reset_rxvecstatus(ab);
}
static int ath11k_mhi_get_msi(struct ath11k_pci *ab_pci)
{
struct ath11k_base *ab = ab_pci->ab;
u32 user_base_data, base_vector;
int ret, num_vectors, i;
int *irq;
unsigned int msi_data;
ret = ath11k_pcic_get_user_msi_assignment(ab, "MHI", &num_vectors,
&user_base_data, &base_vector);
if (ret)
return ret;
ath11k_dbg(ab, ATH11K_DBG_PCI, "num_vectors %d base_vector %d\n",
num_vectors, base_vector);
irq = kcalloc(num_vectors, sizeof(int), GFP_KERNEL);
if (!irq)
return -ENOMEM;
for (i = 0; i < num_vectors; i++) {
msi_data = base_vector;
if (test_bit(ATH11K_FLAG_MULTI_MSI_VECTORS, &ab->dev_flags))
msi_data += i;
irq[i] = ath11k_pci_get_msi_irq(ab, msi_data);
}
ab_pci->mhi_ctrl->irq = irq;
ab_pci->mhi_ctrl->nr_irqs = num_vectors;
return 0;
}
static int ath11k_mhi_op_runtime_get(struct mhi_controller *mhi_cntrl)
{
return 0;
}
static void ath11k_mhi_op_runtime_put(struct mhi_controller *mhi_cntrl)
{
}
static char *ath11k_mhi_op_callback_to_str(enum mhi_callback reason)
{
switch (reason) {
case MHI_CB_IDLE:
return "MHI_CB_IDLE";
case MHI_CB_PENDING_DATA:
return "MHI_CB_PENDING_DATA";
case MHI_CB_LPM_ENTER:
return "MHI_CB_LPM_ENTER";
case MHI_CB_LPM_EXIT:
return "MHI_CB_LPM_EXIT";
case MHI_CB_EE_RDDM:
return "MHI_CB_EE_RDDM";
case MHI_CB_EE_MISSION_MODE:
return "MHI_CB_EE_MISSION_MODE";
case MHI_CB_SYS_ERROR:
return "MHI_CB_SYS_ERROR";
case MHI_CB_FATAL_ERROR:
return "MHI_CB_FATAL_ERROR";
case MHI_CB_BW_REQ:
return "MHI_CB_BW_REQ";
default:
return "UNKNOWN";
}
};
static void ath11k_mhi_op_status_cb(struct mhi_controller *mhi_cntrl,
enum mhi_callback cb)
{
struct ath11k_base *ab = dev_get_drvdata(mhi_cntrl->cntrl_dev);
ath11k_dbg(ab, ATH11K_DBG_BOOT, "notify status reason %s\n",
ath11k_mhi_op_callback_to_str(cb));
switch (cb) {
case MHI_CB_SYS_ERROR:
ath11k_warn(ab, "firmware crashed: MHI_CB_SYS_ERROR\n");
break;
case MHI_CB_EE_RDDM:
ath11k_warn(ab, "firmware crashed: MHI_CB_EE_RDDM\n");
if (!(test_bit(ATH11K_FLAG_UNREGISTERING, &ab->dev_flags)))
queue_work(ab->workqueue_aux, &ab->reset_work);
break;
default:
break;
}
}
static int ath11k_mhi_op_read_reg(struct mhi_controller *mhi_cntrl,
void __iomem *addr,
u32 *out)
{
*out = readl(addr);
return 0;
}
static void ath11k_mhi_op_write_reg(struct mhi_controller *mhi_cntrl,
void __iomem *addr,
u32 val)
{
writel(val, addr);
}
static int ath11k_mhi_read_addr_from_dt(struct mhi_controller *mhi_ctrl)
{
struct device_node *np;
struct resource res;
int ret;
np = of_find_node_by_type(NULL, "memory");
if (!np)
return -ENOENT;
ret = of_address_to_resource(np, 0, &res);
of_node_put(np);
if (ret)
return ret;
mhi_ctrl->iova_start = res.start + 0x1000000;
mhi_ctrl->iova_stop = res.end;
return 0;
}
int ath11k_mhi_register(struct ath11k_pci *ab_pci)
{
struct ath11k_base *ab = ab_pci->ab;
struct mhi_controller *mhi_ctrl;
struct mhi_controller_config *ath11k_mhi_config;
int ret;
mhi_ctrl = mhi_alloc_controller();
if (!mhi_ctrl)
return -ENOMEM;
ab_pci->mhi_ctrl = mhi_ctrl;
mhi_ctrl->cntrl_dev = ab->dev;
mhi_ctrl->regs = ab->mem;
mhi_ctrl->reg_len = ab->mem_len;
if (ab->fw.amss_data && ab->fw.amss_len > 0) {
/* use MHI firmware file from firmware-N.bin */
mhi_ctrl->fw_data = ab->fw.amss_data;
mhi_ctrl->fw_sz = ab->fw.amss_len;
} else {
/* use the old separate mhi.bin MHI firmware file */
ath11k_core_create_firmware_path(ab, ATH11K_AMSS_FILE,
ab_pci->amss_path,
sizeof(ab_pci->amss_path));
mhi_ctrl->fw_image = ab_pci->amss_path;
}
ret = ath11k_mhi_get_msi(ab_pci);
if (ret) {
ath11k_err(ab, "failed to get msi for mhi\n");
goto free_controller;
}
if (!test_bit(ATH11K_FLAG_MULTI_MSI_VECTORS, &ab->dev_flags))
mhi_ctrl->irq_flags = IRQF_SHARED | IRQF_NOBALANCING;
if (test_bit(ATH11K_FLAG_FIXED_MEM_RGN, &ab->dev_flags)) {
ret = ath11k_mhi_read_addr_from_dt(mhi_ctrl);
if (ret < 0)
goto free_controller;
} else {
mhi_ctrl->iova_start = 0;
mhi_ctrl->iova_stop = 0xFFFFFFFF;
}
mhi_ctrl->rddm_size = RDDM_DUMP_SIZE;
mhi_ctrl->sbl_size = SZ_512K;
mhi_ctrl->seg_len = SZ_512K;
mhi_ctrl->fbc_download = true;
mhi_ctrl->runtime_get = ath11k_mhi_op_runtime_get;
mhi_ctrl->runtime_put = ath11k_mhi_op_runtime_put;
mhi_ctrl->status_cb = ath11k_mhi_op_status_cb;
mhi_ctrl->read_reg = ath11k_mhi_op_read_reg;
mhi_ctrl->write_reg = ath11k_mhi_op_write_reg;
switch (ab->hw_rev) {
case ATH11K_HW_QCN9074_HW10:
ath11k_mhi_config = &ath11k_mhi_config_qcn9074;
break;
case ATH11K_HW_QCA6390_HW20:
case ATH11K_HW_WCN6855_HW20:
case ATH11K_HW_WCN6855_HW21:
ath11k_mhi_config = &ath11k_mhi_config_qca6390;
break;
default:
ath11k_err(ab, "failed assign mhi_config for unknown hw rev %d\n",
ab->hw_rev);
ret = -EINVAL;
goto free_controller;
}
ret = mhi_register_controller(mhi_ctrl, ath11k_mhi_config);
if (ret) {
ath11k_err(ab, "failed to register to mhi bus, err = %d\n", ret);
goto free_controller;
}
return 0;
free_controller:
mhi_free_controller(mhi_ctrl);
ab_pci->mhi_ctrl = NULL;
return ret;
}
void ath11k_mhi_unregister(struct ath11k_pci *ab_pci)
{
struct mhi_controller *mhi_ctrl = ab_pci->mhi_ctrl;
mhi_unregister_controller(mhi_ctrl);
kfree(mhi_ctrl->irq);
mhi_free_controller(mhi_ctrl);
}
int ath11k_mhi_start(struct ath11k_pci *ab_pci)
{
struct ath11k_base *ab = ab_pci->ab;
int ret;
ab_pci->mhi_ctrl->timeout_ms = MHI_TIMEOUT_DEFAULT_MS;
ret = mhi_prepare_for_power_up(ab_pci->mhi_ctrl);
if (ret) {
ath11k_warn(ab, "failed to prepare mhi: %d", ret);
return ret;
}
ret = mhi_sync_power_up(ab_pci->mhi_ctrl);
if (ret) {
ath11k_warn(ab, "failed to power up mhi: %d", ret);
return ret;
}
return 0;
}
void ath11k_mhi_stop(struct ath11k_pci *ab_pci)
{
mhi_power_down(ab_pci->mhi_ctrl, true);
mhi_unprepare_after_power_down(ab_pci->mhi_ctrl);
}
int ath11k_mhi_suspend(struct ath11k_pci *ab_pci)
{
struct ath11k_base *ab = ab_pci->ab;
int ret;
ret = mhi_pm_suspend(ab_pci->mhi_ctrl);
if (ret) {
ath11k_warn(ab, "failed to suspend mhi: %d", ret);
return ret;
}
return 0;
}
int ath11k_mhi_resume(struct ath11k_pci *ab_pci)
{
struct ath11k_base *ab = ab_pci->ab;
int ret;
/* Do force MHI resume as some devices like QCA6390, WCN6855
* are not in M3 state but they are functional. So just ignore
* the MHI state while resuming.
*/
ret = mhi_pm_resume_force(ab_pci->mhi_ctrl);
if (ret) {
ath11k_warn(ab, "failed to resume mhi: %d", ret);
return ret;
}
return 0;
}