A QAIC device can report a number of different internal errors. The RAS component services these reports by logging them for the sysadmin, and collecting statistics.
Change-Id: Ib2f0731daf9a4afe05724e550c72bf32313e79bc Signed-off-by: Jeffrey Hugo <[email protected]> --- drivers/gpu/drm/qaic/qaic_ras.c | 653 ++++++++++++++++++++++++++++++++++++++++ drivers/gpu/drm/qaic/qaic_ras.h | 11 + 2 files changed, 664 insertions(+) create mode 100644 drivers/gpu/drm/qaic/qaic_ras.c create mode 100644 drivers/gpu/drm/qaic/qaic_ras.h diff --git a/drivers/gpu/drm/qaic/qaic_ras.c b/drivers/gpu/drm/qaic/qaic_ras.c new file mode 100644 index 0000000..ab51b2d --- /dev/null +++ b/drivers/gpu/drm/qaic/qaic_ras.c @@ -0,0 +1,653 @@ +// SPDX-License-Identifier: GPL-2.0-only + +/* Copyright (c) 2020-2021, The Linux Foundation. All rights reserved. */ +/* Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved. */ + +#include <asm/byteorder.h> +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/mhi.h> + +#include "qaic.h" +#include "qaic_ras.h" + +#define MAGIC 0x55AA +#define VERSION 0x1 +#define HDR_SZ 12 +#define NUM_TEMP_LVL 3 + +enum msg_type { + MSG_PUSH, /* async push from device */ + MSG_REQ, /* sync request to device */ + MSG_RESP, /* sync response from device */ +}; + +enum err_type { + CE, /* correctable error */ + UE, /* uncorrectable error */ + UE_NF, /* uncorrectable error that is non-fatal, expect a disruption */ + ERR_TYPE_MAX, +}; + +static const char * const err_type_str[] = { + [CE] = "Correctable", + [UE] = "Uncorrectable", + [UE_NF] = "Uncorrectable Non-Fatal", +}; + +static const char * const err_class_str[] = { + [CE] = "Warning", + [UE] = "Fatal", + [UE_NF] = "Warning", +}; + +enum err_source { + SOC_MEM, + PCIE, + DDR, + SYS_BUS1, + SYS_BUS2, + NSP_MEM, + TSENS, +}; + +static const char * const err_src_str[TSENS + 1] = { + [SOC_MEM] = "SoC Memory", + [PCIE] = "PCIE", + [DDR] = "DDR", + [SYS_BUS1] = "System Bus source 1", + [SYS_BUS2] = "System Bus source 2", + [NSP_MEM] = "NSP Memory", + [TSENS] = "Temperature Sensors", +}; + +struct ras_data { + /* header start */ + /* Magic number to validate the message */ + u16 magic; + /* RAS version number */ + u16 ver; + u32 seq_num; + /* RAS message type */ + u8 type; + u8 id; + /* Size of RAS message without the header in byte */ + u16 len; + /* header end */ + + u32 result; + /* + * Error source + * 0 : SoC Memory + * 1 : PCIE + * 2 : DDR + * 3 : System Bus source 1 + * 4 : System Bus source 2 + * 5 : NSP Memory + * 6 : Temperature Sensors + */ + u32 source; + /* + * Stores the error type, there are three types of error in RAS + * 0 : correctable error (CE) + * 1 : uncorrectable error (UE) + * 2 : uncorrectable error that is non-fatal (UE_NF) + */ + u32 err_type; + u32 err_threshold; + u32 ce_count; + u32 ue_count; + u32 intr_num; + /* Data specific to error source */ + u8 syndrome[64]; +} __packed; + +struct soc_mem_syndrome { + u64 error_address[8]; +} __packed; + +struct nsp_mem_syndrome { + u32 error_address[8]; + u8 nsp_id; +} __packed; + +struct ddr_syndrome { + u16 instance; + u16 err_type; + u32 count; + u32 irq_status; + u32 data_31_0[2]; + u32 data_63_32[2]; + u32 data_95_64[2]; + u32 data_127_96[2]; + u16 parity_bits; + u16 addr_msb; + u32 addr_lsb; +} __packed; + +struct tsens_syndrome { + u32 threshold_type; + u32 temp; +} __packed; + +struct sysbus1_syndrome { + u8 instance; + u32 slave; + u32 err_type; + u16 addr[8]; +} __packed; + +struct sysbus2_syndrome { + u8 instance; + u8 valid; + u8 word_error; + u8 non_secure; + u8 opc; + u8 error_code; + u8 trans_type; + u8 addr_space; + u16 op_type; + u16 len; + u16 redirect; + u16 path; + u32 ext_id; + u32 lsb2; + u32 msb2; + u32 lsb3; + u32 msb3; +} __packed; + +struct pcie_syndrome { + /* CE info */ + u32 bad_tlp; + u32 bad_dllp; + u32 replay_rollover; + u32 replay_timeout; + u32 rx_err; + u32 internal_ce_count; + /* UE info */ + u8 index; + u32 addr; + /* UE_NF info */ + u32 fc_timeout; + u32 poison_tlp; + u32 ecrc_err; + u32 unsupported_req; + u32 completer_abort; + u32 completion_timeout; +} __packed; + +static const char * const threshold_type_str[NUM_TEMP_LVL] = { + [0] = "lower", + [1] = "upper", + [2] = "critical", +}; + +static void ras_msg_to_cpu(struct ras_data *msg) +{ + struct sysbus1_syndrome *sysbus1_syndrome = + (struct sysbus1_syndrome *)&msg->syndrome[0]; + struct sysbus2_syndrome *sysbus2_syndrome = + (struct sysbus2_syndrome *)&msg->syndrome[0]; + struct soc_mem_syndrome *soc_syndrome = + (struct soc_mem_syndrome *)&msg->syndrome[0]; + struct nsp_mem_syndrome *nsp_syndrome = + (struct nsp_mem_syndrome *)&msg->syndrome[0]; + struct tsens_syndrome *tsens_syndrome = + (struct tsens_syndrome *)&msg->syndrome[0]; + struct pcie_syndrome *pcie_syndrome = + (struct pcie_syndrome *)&msg->syndrome[0]; + struct ddr_syndrome *ddr_syndrome = + (struct ddr_syndrome *)&msg->syndrome[0]; + int i; + + le16_to_cpus(&msg->magic); + le16_to_cpus(&msg->ver); + le32_to_cpus(&msg->seq_num); + le16_to_cpus(&msg->len); + le32_to_cpus(&msg->result); + le32_to_cpus(&msg->source); + le32_to_cpus(&msg->err_type); + le32_to_cpus(&msg->err_threshold); + le32_to_cpus(&msg->ce_count); + le32_to_cpus(&msg->ue_count); + le32_to_cpus(&msg->intr_num); + + switch (msg->source) { + case SOC_MEM: + for (i = 0; i < 8; i++) + le64_to_cpus(&soc_syndrome->error_address[i]); + break; + case PCIE: + le32_to_cpus(&pcie_syndrome->bad_tlp); + le32_to_cpus(&pcie_syndrome->bad_dllp); + le32_to_cpus(&pcie_syndrome->replay_rollover); + le32_to_cpus(&pcie_syndrome->replay_timeout); + le32_to_cpus(&pcie_syndrome->rx_err); + le32_to_cpus(&pcie_syndrome->internal_ce_count); + le32_to_cpus(&pcie_syndrome->fc_timeout); + le32_to_cpus(&pcie_syndrome->poison_tlp); + le32_to_cpus(&pcie_syndrome->ecrc_err); + le32_to_cpus(&pcie_syndrome->unsupported_req); + le32_to_cpus(&pcie_syndrome->completer_abort); + le32_to_cpus(&pcie_syndrome->completion_timeout); + le32_to_cpus(&pcie_syndrome->addr); + break; + case DDR: + le16_to_cpus(&ddr_syndrome->instance); + le16_to_cpus(&ddr_syndrome->err_type); + le32_to_cpus(&ddr_syndrome->count); + le32_to_cpus(&ddr_syndrome->irq_status); + le32_to_cpus(&ddr_syndrome->data_31_0[0]); + le32_to_cpus(&ddr_syndrome->data_31_0[1]); + le32_to_cpus(&ddr_syndrome->data_63_32[0]); + le32_to_cpus(&ddr_syndrome->data_63_32[1]); + le32_to_cpus(&ddr_syndrome->data_95_64[0]); + le32_to_cpus(&ddr_syndrome->data_95_64[1]); + le32_to_cpus(&ddr_syndrome->data_127_96[0]); + le32_to_cpus(&ddr_syndrome->data_127_96[1]); + le16_to_cpus(&ddr_syndrome->parity_bits); + le16_to_cpus(&ddr_syndrome->addr_msb); + le32_to_cpus(&ddr_syndrome->addr_lsb); + break; + case SYS_BUS1: + le32_to_cpus(&sysbus1_syndrome->slave); + le32_to_cpus(&sysbus1_syndrome->err_type); + for (i = 0; i < 8; i++) + le16_to_cpus(&sysbus1_syndrome->addr[i]); + break; + case SYS_BUS2: + le16_to_cpus(&sysbus2_syndrome->op_type); + le16_to_cpus(&sysbus2_syndrome->len); + le16_to_cpus(&sysbus2_syndrome->redirect); + le16_to_cpus(&sysbus2_syndrome->path); + le32_to_cpus(&sysbus2_syndrome->ext_id); + le32_to_cpus(&sysbus2_syndrome->lsb2); + le32_to_cpus(&sysbus2_syndrome->msb2); + le32_to_cpus(&sysbus2_syndrome->lsb3); + le32_to_cpus(&sysbus2_syndrome->msb3); + break; + case NSP_MEM: + for (i = 0; i < 8; i++) + le32_to_cpus(&nsp_syndrome->error_address[i]); + break; + case TSENS: + le32_to_cpus(&tsens_syndrome->threshold_type); + le32_to_cpus(&tsens_syndrome->temp); + break; + } +} + +static void decode_ras_msg(struct qaic_device *qdev, struct ras_data *msg) +{ + struct sysbus1_syndrome *sysbus1_syndrome = + (struct sysbus1_syndrome *)&msg->syndrome[0]; + struct sysbus2_syndrome *sysbus2_syndrome = + (struct sysbus2_syndrome *)&msg->syndrome[0]; + struct soc_mem_syndrome *soc_syndrome = + (struct soc_mem_syndrome *)&msg->syndrome[0]; + struct nsp_mem_syndrome *nsp_syndrome = + (struct nsp_mem_syndrome *)&msg->syndrome[0]; + struct tsens_syndrome *tsens_syndrome = + (struct tsens_syndrome *)&msg->syndrome[0]; + struct pcie_syndrome *pcie_syndrome = + (struct pcie_syndrome *)&msg->syndrome[0]; + struct ddr_syndrome *ddr_syndrome = + (struct ddr_syndrome *)&msg->syndrome[0]; + char *class; + char *level; + + if (msg->magic != MAGIC) { + pci_warn(qdev->pdev, "Dropping RAS message with invalid magic %x\n", msg->magic); + return; + } + + if (msg->ver != VERSION) { + pci_warn(qdev->pdev, "Dropping RAS message with invalid version %d\n", msg->ver); + return; + } + + if (msg->type != MSG_PUSH) { + pci_warn(qdev->pdev, "Dropping non-PUSH RAS message\n"); + return; + } + + if (msg->len != sizeof(*msg) - HDR_SZ) { + pci_warn(qdev->pdev, "Dropping RAS message with invalid len %d\n", msg->len); + return; + } + + if (msg->err_type >= ERR_TYPE_MAX) { + pci_warn(qdev->pdev, "Dropping RAS message with err type %d\n", msg->err_type); + return; + } + + if (msg->err_type == UE) + level = KERN_ERR; + else + level = KERN_WARNING; + + switch (msg->source) { + case SOC_MEM: + pci_printk(level, qdev->pdev, "RAS event.\nClass:%s\nDescription:%s %s %s\nSyndrome:\n 0x%llx\n 0x%llx\n 0x%llx\n 0x%llx\n 0x%llx\n 0x%llx\n 0x%llx\n 0x%llx\n", + err_class_str[msg->err_type], + err_type_str[msg->err_type], + "error from", + err_src_str[msg->source], + soc_syndrome->error_address[0], + soc_syndrome->error_address[1], + soc_syndrome->error_address[2], + soc_syndrome->error_address[3], + soc_syndrome->error_address[4], + soc_syndrome->error_address[5], + soc_syndrome->error_address[6], + soc_syndrome->error_address[7]); + break; + case PCIE: + pci_printk(level, qdev->pdev, "RAS event.\nClass:%s\nDescription:%s %s %s\n", + err_class_str[msg->err_type], + err_type_str[msg->err_type], + "error from", + err_src_str[msg->source]); + + switch (msg->err_type) { + case CE: + printk(KERN_WARNING pr_fmt("Syndrome:\n Bad TLP count %d\n Bad DLLP count %d\n Replay Rollover count %d\n Replay Timeout count %d\n Recv Error count %d\n Internal CE count %d\n"), + pcie_syndrome->bad_tlp, + pcie_syndrome->bad_dllp, + pcie_syndrome->replay_rollover, + pcie_syndrome->replay_timeout, + pcie_syndrome->rx_err, + pcie_syndrome->internal_ce_count); + break; + case UE: + printk(KERN_ERR pr_fmt("Syndrome:\n Index %d\n Address 0x%x\n"), + pcie_syndrome->index, pcie_syndrome->addr); + break; + case UE_NF: + printk(KERN_WARNING pr_fmt("Syndrome:\n FC timeout count %d\n Poisoned TLP count %d\n ECRC error count %d\n Unsupported request count %d\n Completer abort count %d\n Completion timeout count %d\n"), + pcie_syndrome->fc_timeout, + pcie_syndrome->poison_tlp, + pcie_syndrome->ecrc_err, + pcie_syndrome->unsupported_req, + pcie_syndrome->completer_abort, + pcie_syndrome->completion_timeout); + break; + default: + break; + } + break; + case DDR: + pci_printk(level, qdev->pdev, "RAS event.\nClass:%s\nDescription:%s %s %s\nSyndrome:\n Instance %d\n Count %d\n Data 31_0 0x%x 0x%x\n Data 63_32 0x%x 0x%x\n Data 95_64 0x%x 0x%x\n Data 127_96 0x%x 0x%x\n Parity bits 0x%x\n Address msb 0x%x\n Address lsb 0x%x\n", + err_class_str[msg->err_type], + err_type_str[msg->err_type], + "error from", + err_src_str[msg->source], + ddr_syndrome->instance, + ddr_syndrome->count, + ddr_syndrome->data_31_0[1], + ddr_syndrome->data_31_0[0], + ddr_syndrome->data_63_32[1], + ddr_syndrome->data_63_32[0], + ddr_syndrome->data_95_64[1], + ddr_syndrome->data_95_64[0], + ddr_syndrome->data_127_96[1], + ddr_syndrome->data_127_96[0], + ddr_syndrome->parity_bits, + ddr_syndrome->addr_msb, + ddr_syndrome->addr_lsb); + break; + case SYS_BUS1: + pci_printk(level, qdev->pdev, "RAS event.\nClass:%s\nDescription:%s %s %s\nSyndome:\n instance %d\n %s\n err_type %d\n address0 0x%x\n address1 0x%x\n address2 0x%x\n address3 0x%x\n address4 0x%x\n address5 0x%x\n address6 0x%x\n address7 0x%x\n", + err_class_str[msg->err_type], + err_type_str[msg->err_type], + "error from", + err_src_str[msg->source], + sysbus1_syndrome->instance, + sysbus1_syndrome->slave ? "Slave" : "Master", + sysbus1_syndrome->err_type, + sysbus1_syndrome->addr[0], + sysbus1_syndrome->addr[1], + sysbus1_syndrome->addr[2], + sysbus1_syndrome->addr[3], + sysbus1_syndrome->addr[4], + sysbus1_syndrome->addr[5], + sysbus1_syndrome->addr[6], + sysbus1_syndrome->addr[7]); + break; + case SYS_BUS2: + pci_printk(level, qdev->pdev, "RAS event.\nClass:%s\nDescription:%s %s %s\nSyndome:\n instance %d\n valid %d\n word error %d\n non-secure %d\n opc %d\n error code %d\n transaction type %d\n address space %d\n operation type %d\n len %d\n redirect %d\n path %d\n ext_id %d\n lsb2 %d\n msb2 %d\n lsb3 %d\n msb3 %d\n", + err_class_str[msg->err_type], + err_type_str[msg->err_type], + "error from", + err_src_str[msg->source], + sysbus2_syndrome->instance, + sysbus2_syndrome->valid, + sysbus2_syndrome->word_error, + sysbus2_syndrome->non_secure, + sysbus2_syndrome->opc, + sysbus2_syndrome->error_code, + sysbus2_syndrome->trans_type, + sysbus2_syndrome->addr_space, + sysbus2_syndrome->op_type, + sysbus2_syndrome->len, + sysbus2_syndrome->redirect, + sysbus2_syndrome->path, + sysbus2_syndrome->ext_id, + sysbus2_syndrome->lsb2, + sysbus2_syndrome->msb2, + sysbus2_syndrome->lsb3, + sysbus2_syndrome->msb3); + break; + case NSP_MEM: + pci_printk(level, qdev->pdev, "RAS event.\nClass:%s\nDescription:%s %s %s\nSyndrome:\n NSP ID %d\n 0x%x\n 0x%x\n 0x%x\n 0x%x\n 0x%x\n 0x%x\n 0x%x\n 0x%x\n", + err_class_str[msg->err_type], + err_type_str[msg->err_type], + "error from", + err_src_str[msg->source], + nsp_syndrome->nsp_id, + nsp_syndrome->error_address[0], + nsp_syndrome->error_address[1], + nsp_syndrome->error_address[2], + nsp_syndrome->error_address[3], + nsp_syndrome->error_address[4], + nsp_syndrome->error_address[5], + nsp_syndrome->error_address[6], + nsp_syndrome->error_address[7]); + break; + case TSENS: + if (tsens_syndrome->threshold_type >= NUM_TEMP_LVL) { + pci_warn(qdev->pdev, "Dropping RAS message with invalid temp threshold %d\n", + tsens_syndrome->threshold_type); + break; + } + + if (msg->err_type) + class = "Fatal"; + else if (tsens_syndrome->threshold_type) + class = "Critical"; + else + class = "Warning"; + + pci_printk(level, qdev->pdev, "RAS event.\nClass:%s\nDescription:%s %s %s\nSyndrome:\n %s threshold\n %d deg C\n", + class, + err_type_str[msg->err_type], + "error from", + err_src_str[msg->source], + threshold_type_str[tsens_syndrome->threshold_type], + tsens_syndrome->temp); + break; + } + + /* Uncorrectable errors are fatal */ + if (msg->err_type == UE) + mhi_soc_reset(qdev->mhi_cntl); + + switch (msg->err_type) { + case CE: + if (qdev->ce_count != UINT_MAX) + qdev->ce_count++; + break; + case UE: + if (qdev->ce_count != UINT_MAX) + qdev->ue_count++; + break; + case UE_NF: + if (qdev->ce_count != UINT_MAX) + qdev->ue_nf_count++; + break; + default: + /* not possible */ + break; + } +} + +static ssize_t ce_count_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct pci_dev *pdev = container_of(dev, struct pci_dev, dev); + struct qaic_device *qdev = pci_get_drvdata(pdev); + + return snprintf(buf, PAGE_SIZE, "%d\n", qdev->ce_count); +} + +static ssize_t ue_count_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct pci_dev *pdev = container_of(dev, struct pci_dev, dev); + struct qaic_device *qdev = pci_get_drvdata(pdev); + + return snprintf(buf, PAGE_SIZE, "%d\n", qdev->ue_count); +} + +static ssize_t ue_nonfatal_count_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct pci_dev *pdev = container_of(dev, struct pci_dev, dev); + struct qaic_device *qdev = pci_get_drvdata(pdev); + + return snprintf(buf, PAGE_SIZE, "%d\n", qdev->ue_nf_count); +} + +static DEVICE_ATTR_RO(ce_count); +static DEVICE_ATTR_RO(ue_count); +static DEVICE_ATTR_RO(ue_nonfatal_count); + +static struct attribute *ras_attrs[] = { + &dev_attr_ce_count.attr, + &dev_attr_ue_count.attr, + &dev_attr_ue_nonfatal_count.attr, + NULL, +}; + +static struct attribute_group ras_group = { + .attrs = ras_attrs, +}; + +static int qaic_ras_mhi_probe(struct mhi_device *mhi_dev, + const struct mhi_device_id *id) +{ + struct qaic_device *qdev; + struct ras_data *resp; + int ret; + + qdev = pci_get_drvdata(to_pci_dev(mhi_dev->mhi_cntrl->cntrl_dev)); + + dev_set_drvdata(&mhi_dev->dev, qdev); + qdev->ras_ch = mhi_dev; + ret = mhi_prepare_for_transfer(qdev->ras_ch); + + if (ret) + return ret; + + resp = kmalloc(sizeof(*resp), GFP_KERNEL); + if (!resp) { + mhi_unprepare_from_transfer(qdev->ras_ch); + return -ENOMEM; + } + + ret = mhi_queue_buf(qdev->ras_ch, DMA_FROM_DEVICE, resp, sizeof(*resp), + MHI_EOT); + if (ret) { + mhi_unprepare_from_transfer(qdev->ras_ch); + return ret; + } + + ret = device_add_group(&qdev->pdev->dev, &ras_group); + if (ret) + pci_dbg(qdev->pdev, "ras add sysfs failed %d\n", ret); + + return 0; +} + +static void qaic_ras_mhi_remove(struct mhi_device *mhi_dev) +{ + struct qaic_device *qdev; + + qdev = dev_get_drvdata(&mhi_dev->dev); + mhi_unprepare_from_transfer(qdev->ras_ch); + qdev->ras_ch = NULL; + device_remove_group(&qdev->pdev->dev, &ras_group); +} + +static void qaic_ras_mhi_ul_xfer_cb(struct mhi_device *mhi_dev, + struct mhi_result *mhi_result) +{ +} + +static void qaic_ras_mhi_dl_xfer_cb(struct mhi_device *mhi_dev, + struct mhi_result *mhi_result) +{ + struct qaic_device *qdev = dev_get_drvdata(&mhi_dev->dev); + struct ras_data *msg = mhi_result->buf_addr; + int ret; + + if (mhi_result->transaction_status) { + kfree(msg); + return; + } + + ras_msg_to_cpu(msg); + decode_ras_msg(qdev, msg); + + ret = mhi_queue_buf(qdev->ras_ch, DMA_FROM_DEVICE, msg, sizeof(*msg), + MHI_EOT); + if (ret) { + pci_err(qdev->pdev, "Cannot requeue RAS recv buf %d\n", ret); + kfree(msg); + } +} + +static const struct mhi_device_id qaic_ras_mhi_match_table[] = { + { .chan = "QAIC_STATUS", }, + {}, +}; + +static struct mhi_driver qaic_ras_mhi_driver = { + .id_table = qaic_ras_mhi_match_table, + .remove = qaic_ras_mhi_remove, + .probe = qaic_ras_mhi_probe, + .ul_xfer_cb = qaic_ras_mhi_ul_xfer_cb, + .dl_xfer_cb = qaic_ras_mhi_dl_xfer_cb, + .driver = { + .name = "qaic_ras", + .owner = THIS_MODULE, + }, +}; + +void qaic_ras_register(void) +{ + int ret; + + ret = mhi_driver_register(&qaic_ras_mhi_driver); + if (ret) + pr_debug("qaic: ras register failed %d\n", ret); +} + +void qaic_ras_unregister(void) +{ + mhi_driver_unregister(&qaic_ras_mhi_driver); +} diff --git a/drivers/gpu/drm/qaic/qaic_ras.h b/drivers/gpu/drm/qaic/qaic_ras.h new file mode 100644 index 0000000..e431680 --- /dev/null +++ b/drivers/gpu/drm/qaic/qaic_ras.h @@ -0,0 +1,11 @@ +/* SPDX-License-Identifier: GPL-2.0-only + * + * Copyright (c) 2020, The Linux Foundation. All rights reserved. + */ + +#ifndef __QAIC_RAS_H__ +#define __QAIC_RAS_H__ + +void qaic_ras_register(void); +void qaic_ras_unregister(void); +#endif /* __QAIC_RAS_H__ */ -- 2.7.4
