This driver adds the code required by Hisilicon accelerator device to realize the live migration function. It mainly includes the following functions: (1).Match the accelerator device with the vfio-pci driver framework. (2).Processing of the status of the live migration function and processing of the migration data. (3).Operation and data processing of accelerator hardware devices

Signed-off-by: Longfang Liu liulongfang@huawei.com --- drivers/vfio/pci/Kconfig | 9 + drivers/vfio/pci/Makefile | 3 +- drivers/vfio/pci/hisilicon/acc_vf_migration.c | 1164 +++++++++++++++++++++++++ drivers/vfio/pci/hisilicon/acc_vf_migration.h | 170 ++++ 4 files changed, 1345 insertions(+), 1 deletion(-) create mode 100644 drivers/vfio/pci/hisilicon/acc_vf_migration.c create mode 100644 drivers/vfio/pci/hisilicon/acc_vf_migration.h

diff --git a/drivers/vfio/pci/Kconfig b/drivers/vfio/pci/Kconfig index 24ee260..791be27 100644 --- a/drivers/vfio/pci/Kconfig +++ b/drivers/vfio/pci/Kconfig @@ -30,3 +30,12 @@ config VFIO_PCI_INTX config VFIO_PCI_IGD depends on VFIO_PCI def_bool y if X86 + +config VFIO_PCI_HISI_MIGRATION + bool "Support for Hisilicon Live Migaration" + depends on ARM64 && ACPI + select PCI_IOV + default y + help + Support for HiSilicon vfio pci to support VF live migration. + diff --git a/drivers/vfio/pci/Makefile b/drivers/vfio/pci/Makefile index 76d8ec0..7dd1176 100644 --- a/drivers/vfio/pci/Makefile +++ b/drivers/vfio/pci/Makefile @@ -2,4 +2,5 @@ vfio-pci-y := vfio_pci.o vfio_pci_intrs.o vfio_pci_rdwr.o vfio_pci_config.o vfio-pci-$(CONFIG_VFIO_PCI_IGD) += vfio_pci_igd.o

-obj-$(CONFIG_VFIO_PCI) += vfio-pci.o +vfio-pci-$(CONFIG_VFIO_PCI_HISI_MIGRATION) += hisilicon/acc_vf_migration.o +obj-$(CONFIG_VFIO_PCI) += vfio-pci.o \ No newline at end of file diff --git a/drivers/vfio/pci/hisilicon/acc_vf_migration.c b/drivers/vfio/pci/hisilicon/acc_vf_migration.c new file mode 100644 index 0000000..45382c7 --- /dev/null +++ b/drivers/vfio/pci/hisilicon/acc_vf_migration.c @@ -0,0 +1,1164 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2021 HiSilicon Limited. */ + +#include <linux/device.h> +#include <linux/debugfs.h> +#include <linux/eventfd.h> +#include <linux/file.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/pci.h> +#include <linux/sysfs.h> +#include <linux/vfio.h> + +#include "acc_vf_migration.h" + +#define VDM_OFFSET(x) offsetof(struct vfio_device_migration_info, x) +void vfio_pci_hisilicon_acc_uninit(struct acc_vf_migration *acc_vf_dev); + +/* return 0 mailbox ready, -ETIMEDOUT hardware timeout */ +static int qm_wait_mb_ready(struct hisi_qm *qm) +{ + u32 val; + + return readl_relaxed_poll_timeout(qm->io_base + QM_MB_CMD_SEND_BASE, + val, !((val >> QM_MB_BUSY_SHIFT) & + 0x1), MB_POLL_PERIOD_US, + MB_POLL_TIMEOUT_US); +} + +/* return 0 VM acc device ready, -ETIMEDOUT hardware timeout */ +static int qm_wait_dev_ready(struct hisi_qm *qm) +{ + u32 val; + + return readl_relaxed_poll_timeout(qm->io_base + QM_VF_EQ_INT_MASK, + val, !(val & 0x1), MB_POLL_PERIOD_US, + MB_POLL_TIMEOUT_US); +} + + +/* 128 bit should be written to hardware at one time to trigger a mailbox */ +static void qm_mb_write(struct hisi_qm *qm, const void *src) +{ + void __iomem *fun_base = qm->io_base + QM_MB_CMD_SEND_BASE; + unsigned long tmp0 = 0; + unsigned long tmp1 = 0; + + if (!IS_ENABLED(CONFIG_ARM64)) { + memcpy_toio(fun_base, src, 16); + wmb(); + return; + } + + asm volatile("ldp %0, %1, %3\n" + "stp %0, %1, %2\n" + "dsb sy\n" + : "=&r" (tmp0), + "=&r" (tmp1), + "+Q" (*((char __iomem *)fun_base)) + : "Q" (*((char *)src)) + : "memory"); +} + +static void qm_mb_pre_init(struct qm_mailbox *mailbox, u8 cmd, + u16 queue, bool op) +{ + mailbox->w0 = cpu_to_le16(cmd | + (op ? 0x1 << QM_MB_OP_SHIFT : 0) | + (0x1 << QM_MB_BUSY_SHIFT)); + mailbox->queue_num = cpu_to_le16(queue); + mailbox->rsvd = 0; +} + +static int qm_mb_nolock(struct hisi_qm *qm, struct qm_mailbox *mailbox) +{ + int cnt = 0; + + if (unlikely(qm_wait_mb_ready(qm))) { + dev_err(&qm->pdev->dev, "QM mailbox is busy to start!\n"); + return -EBUSY; + } + + qm_mb_write(qm, mailbox); + while (true) { + if (!qm_wait_mb_ready(qm)) + break; + if (++cnt > QM_MB_MAX_WAIT_CNT) { + dev_err(&qm->pdev->dev, "QM mailbox operation timeout!\n"); + return -EBUSY; + } + } + return 0; +} + +static int qm_mb(struct hisi_qm *qm, u8 cmd, dma_addr_t dma_addr, u16 queue, + bool op) +{ + struct qm_mailbox mailbox; + int ret; + + dev_dbg(&qm->pdev->dev, "QM mailbox request to q%u: %u-0x%llx\n", + queue, cmd, (unsigned long long)dma_addr); + + qm_mb_pre_init(&mailbox, cmd, queue, op); + mailbox.base_l = cpu_to_le32(lower_32_bits(dma_addr)); + mailbox.base_h = cpu_to_le32(upper_32_bits(dma_addr)); + + mutex_lock(&qm->mailbox_lock); + ret = qm_mb_nolock(qm, &mailbox); + mutex_unlock(&qm->mailbox_lock); + + return ret; +} + +/* + * Each state Reg is checked 100 times, + * with a delay of 100 microseconds after each check + */ +static u32 acc_check_reg_state(struct hisi_qm *qm, u32 regs) +{ + int check_times = 0; + u32 state; + + state = readl(qm->io_base + regs); + while (state && check_times < ERROR_CHECK_TIMEOUT) { + udelay(CHECK_DELAY_TIME); + state = readl(qm->io_base + regs); + check_times++; + } + + return state; +} + +/* Check the PF's RAS state and Function INT state */ +static int qm_check_int_state(struct acc_vf_migration *acc_vf_dev) +{ + struct hisi_qm *vfqm = acc_vf_dev->vf_qm; + struct hisi_qm *qm = acc_vf_dev->pf_qm; + struct device *dev = &qm->pdev->dev; + u32 state; + + /* Check RAS state */ + state = acc_check_reg_state(qm, QM_ABNORMAL_INT_STATUS); + if (state) { + dev_err(dev, "failed to check QM RAS state!\n"); + return -EBUSY; + } + + /* Check Function Communication state between PF and VF */ + state = acc_check_reg_state(vfqm, QM_IFC_INT_STATUS); + if (state) { + dev_err(dev, "failed to check QM IFC INT state!\n"); + return -EBUSY; + } + state = acc_check_reg_state(vfqm, QM_IFC_INT_SET_V); + if (state) { + dev_err(dev, "failed to check QM IFC INT SET state!\n"); + return -EBUSY; + } + + /* Check submodule task state */ + switch (acc_vf_dev->acc_type) { + case HISI_SEC: + state = acc_check_reg_state(qm, SEC_CORE_INT_STATUS); + if (state) { + dev_err(dev, "failed to check QM SEC Core INT state!\n"); + return -EBUSY; + } + break; + case HISI_HPRE: + state = acc_check_reg_state(qm, HPRE_HAC_INT_STATUS); + if (state) { + dev_err(dev, "failed to check QM HPRE HAC INT state!\n"); + return -EBUSY; + } + break; + case HISI_ZIP: + state = acc_check_reg_state(qm, HZIP_CORE_INT_STATUS); + if (state) { + dev_err(dev, "failed to check QM ZIP Core INT state!\n"); + return -EBUSY; + } + break; + default: + dev_err(dev, "failed to detect acc module type!\n"); + return -EINVAL; + } + + return 0; +} + +static int qm_read_reg(struct hisi_qm *qm, u32 reg_addr, + u32 *data, u8 nums) +{ + int i; + + if (nums < 1 || nums > QM_REGS_MAX_LEN) { + dev_err(&qm->pdev->dev, "QM read input parameter is error!\n"); + return -EINVAL; + } + + for (i = 0; i < nums; i++) { + data[i] = readl(qm->io_base + reg_addr); + reg_addr += QM_REG_ADDR_OFFSET; + } + + return 0; +} + +static int qm_write_reg(struct hisi_qm *qm, u32 reg_addr, + u32 *data, u8 nums) +{ + int i; + + if (nums < 1 || nums > QM_REGS_MAX_LEN) { + dev_err(&qm->pdev->dev, "QM write input parameter is error!\n"); + return -EINVAL; + } + + for (i = 0; i < nums; i++) { + writel(data[i], qm->io_base + reg_addr); + reg_addr += QM_REG_ADDR_OFFSET; + } + + return 0; +} + +static int qm_get_vft(struct hisi_qm *qm, u32 *base, u32 *number) +{ + u64 sqc_vft; + int ret; + + ret = qm_mb(qm, QM_MB_CMD_SQC_VFT_V2, 0, 0, 1); + if (ret) + return ret; + + sqc_vft = readl(qm->io_base + QM_MB_CMD_DATA_ADDR_L) | + ((u64)readl(qm->io_base + QM_MB_CMD_DATA_ADDR_H) << + QM_XQC_ADDR_OFFSET); + *base = QM_SQC_VFT_BASE_MASK_V2 & (sqc_vft >> QM_SQC_VFT_BASE_SHIFT_V2); + *number = (QM_SQC_VFT_NUM_MASK_V2 & + (sqc_vft >> QM_SQC_VFT_NUM_SHIFT_V2)) + 1; + + return 0; +} + +static int qm_get_sqc(struct hisi_qm *qm, u64 *addr) +{ + int ret; + + ret = qm_mb(qm, QM_MB_CMD_SQC_BT, 0, 0, 1); + if (ret) + return ret; + + *addr = readl(qm->io_base + QM_MB_CMD_DATA_ADDR_L) | + ((u64)readl(qm->io_base + QM_MB_CMD_DATA_ADDR_H) << + QM_XQC_ADDR_OFFSET); + + return 0; +} + +static int qm_get_cqc(struct hisi_qm *qm, u64 *addr) +{ + int ret; + + ret = qm_mb(qm, QM_MB_CMD_CQC_BT, 0, 0, 1); + if (ret) + return ret; + + *addr = readl(qm->io_base + QM_MB_CMD_DATA_ADDR_L) | + ((u64)readl(qm->io_base + QM_MB_CMD_DATA_ADDR_H) << + QM_XQC_ADDR_OFFSET); + + return 0; +} + +static int qm_rw_regs_read(struct hisi_qm *qm, struct acc_vf_data *vf_data) +{ + struct device *dev = &qm->pdev->dev; + int ret; + + /* check VM task driver state */ + if (unlikely(qm_wait_dev_ready(qm))) { + dev_err(&qm->pdev->dev, "QM device is not ready to read!\n"); + return -EBUSY; + } + + ret = qm_read_reg(qm, QM_VF_AEQ_INT_MASK, &vf_data->aeq_int_mask, 1); + if (ret) { + dev_err(dev, "failed to read QM_VF_AEQ_INT_MASK!\n"); + return ret; + } + + ret = qm_read_reg(qm, QM_VF_EQ_INT_MASK, &vf_data->eq_int_mask, 1); + if (ret) { + dev_err(dev, "failed to read QM_VF_EQ_INT_MASK!\n"); + return ret; + } + + ret = qm_read_reg(qm, QM_IFC_INT_SOURCE_V, + &vf_data->ifc_int_source, 1); + if (ret) { + dev_err(dev, "failed to read QM_IFC_INT_SOURCE_V!\n"); + return ret; + } + + ret = qm_read_reg(qm, QM_IFC_INT_MASK, &vf_data->ifc_int_mask, 1); + if (ret) { + dev_err(dev, "failed to read QM_IFC_INT_MASK!\n"); + return ret; + } + + ret = qm_read_reg(qm, QM_IFC_INT_SET_V, &vf_data->ifc_int_set, 1); + if (ret) { + dev_err(dev, "failed to read QM_IFC_INT_SET_V!\n"); + return ret; + } + + /* QM_EQC_DW has 7 regs */ + ret = qm_read_reg(qm, QM_EQC_DW0, vf_data->qm_eqc_dw, 7); + if (ret) { + dev_err(dev, "failed to read QM_EQC_DW!\n"); + return ret; + } + + /* QM_AEQC_DW has 7 regs */ + ret = qm_read_reg(qm, QM_AEQC_DW0, vf_data->qm_aeqc_dw, 7); + if (ret) { + dev_err(dev, "failed to read QM_AEQC_DW!\n"); + return ret; + } + + return 0; +} + +static int qm_rw_regs_write(struct hisi_qm *qm, struct acc_vf_data *vf_data) +{ + struct device *dev = &qm->pdev->dev; + int ret; + + /* check VF state */ + if (unlikely(qm_wait_mb_ready(qm))) { + dev_err(&qm->pdev->dev, "QM device is not ready to write!\n"); + return -EBUSY; + } + + ret = qm_write_reg(qm, QM_VF_AEQ_INT_MASK, &vf_data->aeq_int_mask, 1); + if (ret) { + dev_err(dev, "failed to write QM_VF_AEQ_INT_MASK!\n"); + return ret; + } + + ret = qm_write_reg(qm, QM_VF_EQ_INT_MASK, &vf_data->eq_int_mask, 1); + if (ret) { + dev_err(dev, "failed to write QM_VF_EQ_INT_MASK!\n"); + return ret; + } + + ret = qm_write_reg(qm, QM_IFC_INT_SOURCE_V, + &vf_data->ifc_int_source, 1); + if (ret) { + dev_err(dev, "failed to write QM_IFC_INT_SOURCE_V!\n"); + return ret; + } + + ret = qm_write_reg(qm, QM_IFC_INT_MASK, &vf_data->ifc_int_mask, 1); + if (ret) { + dev_err(dev, "failed to write QM_IFC_INT_MASK!\n"); + return ret; + } + + ret = qm_write_reg(qm, QM_IFC_INT_SET_V, &vf_data->ifc_int_set, 1); + if (ret) { + dev_err(dev, "failed to write QM_IFC_INT_SET_V!\n"); + return ret; + } + + ret = qm_write_reg(qm, QM_QUE_ISO_CFG_V, &vf_data->que_iso_cfg, 1); + if (ret) { + dev_err(dev, "failed to write QM_QUE_ISO_CFG_V!\n"); + return ret; + } + + /* QM_EQC_DW has 7 regs */ + ret = qm_write_reg(qm, QM_EQC_DW0, vf_data->qm_eqc_dw, 7); + if (ret) { + dev_err(dev, "failed to write QM_EQC_DW!\n"); + return ret; + } + + /* QM_AEQC_DW has 7 regs */ + ret = qm_write_reg(qm, QM_AEQC_DW0, vf_data->qm_aeqc_dw, 7); + if (ret) { + dev_err(dev, "failed to write QM_AEQC_DW!\n"); + return ret; + } + + return 0; +} + +/* + * the vf QM have unbind from host, insmod in the VM + * so, qm just have the addr from pci dev + * others is null. + * so we need read from the SEC hardware REGs. + */ +static int vf_migration_data_store(struct hisi_qm *qm, + struct acc_vf_migration *acc_vf_dev) +{ + struct acc_vf_data *vf_data = acc_vf_dev->vf_data; + struct device *dev = &qm->pdev->dev; + int ret; + + ret = qm_rw_regs_read(qm, vf_data); + if (ret) { + dev_err(dev, "failed to read QM regs!\n"); + return -EINVAL; + } + + /* + * every Reg is 32 bit, the dma address is 64 bit + * so, the dma address is store in the Reg2 and Reg1 + */ + vf_data->eqe_dma = vf_data->qm_eqc_dw[2]; + vf_data->eqe_dma <<= QM_XQC_ADDR_OFFSET; + vf_data->eqe_dma |= vf_data->qm_eqc_dw[1]; + vf_data->aeqe_dma = vf_data->qm_aeqc_dw[2]; + vf_data->aeqe_dma <<= QM_XQC_ADDR_OFFSET; + vf_data->aeqe_dma |= vf_data->qm_aeqc_dw[1]; + + /* Through SQC_BT/CQC_BT to get sqc and cqc address */ + ret = qm_get_sqc(qm, &vf_data->sqc_dma); + if (ret) { + dev_err(dev, "failed to read SQC addr!\n"); + return -EINVAL; + } + + ret = qm_get_cqc(qm, &vf_data->cqc_dma); + if (ret) { + dev_err(dev, "failed to read CQC addr!\n"); + return -EINVAL; + } + + return 0; +} + +static void qm_dev_cmd_init(struct hisi_qm *qm) +{ + /* clear VF communication status registers. */ + writel(0x1, qm->io_base + QM_IFC_INT_SOURCE_V); + + /* enable pf and vf communication. */ + writel(0x0, qm->io_base + QM_IFC_INT_MASK); +} + +static void qm_db(struct hisi_qm *qm, u16 qn, u8 cmd, + u16 index, u8 priority) +{ + void __iomem *io_base = qm->io_base; + u16 randata = 0; + u64 doorbell; + + if (cmd == QM_DOORBELL_CMD_SQ || cmd == QM_DOORBELL_CMD_CQ) + io_base = qm->db_io_base + (u64)qn * qm->db_interval + + QM_DOORBELL_SQ_CQ_BASE_V2; + else + io_base += QM_DOORBELL_EQ_AEQ_BASE_V2; + + doorbell = qn | ((u64)cmd << QM_DB_CMD_SHIFT_V2) | + ((u64)randata << QM_DB_RAND_SHIFT_V2) | + ((u64)index << QM_DB_INDEX_SHIFT_V2) | + ((u64)priority << QM_DB_PRIORITY_SHIFT_V2); + + writeq(doorbell, io_base); +} + +static void vf_qm_fun_restart(struct hisi_qm *qm) +{ + int i; + + for (i = 0; i < qm->qp_num; i++) + qm_db(qm, i, QM_DOORBELL_CMD_SQ, 0, 1); +} + +static int vf_info_check(struct hisi_qm *qm, + struct acc_vf_migration *acc_vf_dev) +{ + struct acc_vf_data *vf_data = acc_vf_dev->vf_data; + struct device *dev = &qm->pdev->dev; + u32 que_iso_state; + int ret; + + /* vf acc type check */ + if (vf_data->acc_type != acc_vf_dev->acc_type) { + dev_err(dev, "failed to match VF acc type!\n"); + return -EINVAL; + } + + /* vf qp num check */ + ret = qm_get_vft(qm, &qm->qp_base, &qm->qp_num); + if (ret || qm->qp_num <= 1) { + dev_err(dev, "failed to get vft qp nums!\n"); + return ret; + } + if (vf_data->qp_num != qm->qp_num) { + dev_err(dev, "failed to match VF qp num!\n"); + return -EINVAL; + } + + /* vf isolation state check */ + ret = qm_read_reg(qm, QM_QUE_ISO_CFG_V, &que_iso_state, 1); + if (ret) { + dev_err(dev, "failed to read QM_QUE_ISO_CFG_V!\n"); + return ret; + } + if (vf_data->que_iso_cfg != que_iso_state) { + dev_err(dev, "failed to match isolation state!\n"); + return -EINVAL; + } + + return 0; +} + +static int vf_migration_data_recover(struct hisi_qm *qm, + struct acc_vf_data *vf_data) +{ + struct device *dev = &qm->pdev->dev; + int ret; + + qm->eqe_dma = vf_data->eqe_dma; + qm->aeqe_dma = vf_data->aeqe_dma; + qm->sqc_dma = vf_data->sqc_dma; + qm->cqc_dma = vf_data->cqc_dma; + + qm->qp_base = vf_data->qp_base; + qm->qp_num = vf_data->qp_num; + + ret = qm_rw_regs_write(qm, vf_data); + if (ret) { + dev_err(dev, "Set VF regs failed!\n"); + return ret; + } + + ret = qm_mb(qm, QM_MB_CMD_SQC_BT, qm->sqc_dma, 0, 0); + if (ret) { + dev_err(dev, "Set sqc failed!\n"); + return ret; + } + + ret = qm_mb(qm, QM_MB_CMD_CQC_BT, qm->cqc_dma, 0, 0); + if (ret) { + dev_err(dev, "Set cqc failed!\n"); + return ret; + } + + /* which ACC module need to reinit? */ + qm_dev_cmd_init(qm); + + /* reopen the VF msi interrruption */ + writel(0x0, qm->io_base + QM_VF_EQ_INT_MASK); + writel(0x0, qm->io_base + QM_VF_AEQ_INT_MASK); + + return 0; +} + +static int vf_qm_cache_wb(struct hisi_qm *qm) +{ + unsigned int val; + + writel(0x1, qm->io_base + QM_CACHE_WB_START); + if (readl_relaxed_poll_timeout(qm->io_base + QM_CACHE_WB_DONE, + val, val & BIT(0), MB_POLL_PERIOD_US, + MB_POLL_TIMEOUT_US)) { + dev_err(&qm->pdev->dev, "vf QM writeback sqc cache fail!\n"); + return -EINVAL; + } + + return 0; +} + +static int vf_qm_func_stop(struct hisi_qm *qm) +{ + return qm_mb(qm, QM_MB_CMD_PAUSE_QM, 0, 0, 0); +} + +static int vf_qm_state_pre_save(struct hisi_qm *qm, + struct acc_vf_migration *acc_vf_dev) +{ + struct acc_vf_data *vf_data = acc_vf_dev->vf_data; + struct device *dev = &qm->pdev->dev; + int ret; + + /* check VM task driver state */ + if (unlikely(qm_wait_dev_ready(qm))) { + dev_err(&qm->pdev->dev, "QM device is not ready to read!\n"); + return -EBUSY; + } + + /* vf acc type save */ + vf_data->acc_type = acc_vf_dev->acc_type; + + /* vf qp num save */ + ret = qm_get_vft(qm, &qm->qp_base, &qm->qp_num); + if (ret || qm->qp_num <= 1) { + dev_err(dev, "failed to get vft qp nums!\n"); + return -EINVAL; + } + vf_data->qp_base = qm->qp_base; + vf_data->qp_num = qm->qp_num; + + /* vf isolation state save */ + ret = qm_read_reg(qm, QM_QUE_ISO_CFG_V, &vf_data->que_iso_cfg, 1); + if (ret) { + dev_err(dev, "failed to read QM_QUE_ISO_CFG_V!\n"); + return ret; + } + + return 0; +} + +static int vf_qm_state_save(struct hisi_qm *qm, + struct acc_vf_migration *acc_vf_dev) +{ + struct device *dev = &acc_vf_dev->vf_dev->dev; + int ret; + + /* First stop the ACC vf function */ + ret = vf_qm_func_stop(qm); + if (ret) { + dev_err(dev, "failed to stop QM VF function!\n"); + goto state_error; + } + + /* Check the VF's RAS and Interrution state */ + ret = qm_check_int_state(acc_vf_dev); + if (ret) { + dev_err(dev, "failed to check QM INT state!\n"); + goto state_error; + } + + /* hisi_qm_cache_wb store cache data to DDR */ + ret = vf_qm_cache_wb(qm); + if (ret) { + dev_err(dev, "failed to writeback QM Cache!\n"); + goto state_error; + } + + ret = vf_migration_data_store(qm, acc_vf_dev); + if (ret) { + dev_err(dev, "failed to get and store migration data!\n"); + goto state_error; + } + + return 0; + +state_error: + vf_qm_fun_restart(qm); + return ret; +} + +static int vf_qm_state_resume(struct hisi_qm *qm, + struct acc_vf_migration *acc_vf_dev) +{ + struct device *dev = &acc_vf_dev->vf_dev->dev; + int ret; + + /* recover data to VF */ + ret = vf_migration_data_recover(qm, acc_vf_dev->vf_data); + if (ret) { + dev_err(dev, "failed to recover the VF!\n"); + return ret; + } + + /* restart all destination VF's QP */ + vf_qm_fun_restart(qm); + + return 0; +} + +static int acc_vf_set_device_state(struct acc_vf_migration *acc_vf_dev, + u32 state) +{ + struct vfio_device_migration_info *mig_ctl = acc_vf_dev->mig_ctl; + struct device *dev = &acc_vf_dev->vf_dev->dev; + struct hisi_qm *qm = acc_vf_dev->vf_qm; + int ret = 0; + + if (state == mig_ctl->device_state) + return 0; + + switch (state) { + case VFIO_DEVICE_STATE_RUNNING: + if (mig_ctl->device_state == VFIO_DEVICE_STATE_RESUMING) { + ret = vf_qm_state_resume(qm, acc_vf_dev); + if (ret) { + dev_err(dev, "failed to resume device!\n"); + return -EFAULT; + } + } + + break; + case VFIO_DEVICE_STATE_SAVING | VFIO_DEVICE_STATE_RUNNING: + /* ACC should in the pre cycle to read match information data */ + ret = vf_qm_state_pre_save(qm, acc_vf_dev); + if (ret) { + dev_err(dev, "failed to pre save device state!\n"); + return -EFAULT; + } + + /* set the pending_byte and match data size */ + mig_ctl->data_size = QM_MATCH_SIZE; + mig_ctl->pending_bytes = mig_ctl->data_size; + + break; + case VFIO_DEVICE_STATE_SAVING: + /* stop the vf function */ + ret = vf_qm_state_save(qm, acc_vf_dev); + if (ret) { + dev_err(dev, "failed to save device state!\n"); + return -EFAULT; + } + + /* set the pending_byte and data_size */ + mig_ctl->data_size = sizeof(struct acc_vf_data); + mig_ctl->pending_bytes = mig_ctl->data_size; + + break; + case VFIO_DEVICE_STATE_STOP: + /* restart all VF's QP */ + vf_qm_fun_restart(qm); + + break; + case VFIO_DEVICE_STATE_RESUMING: + + break; + default: + ret = -EFAULT; + } + + if (!ret) { + dev_info(dev, "migration state: %s ----------> %s!\n", + vf_dev_state[mig_ctl->device_state], + vf_dev_state[state]); + mig_ctl->device_state = state; + } + + return ret; +} + +static int acc_vf_data_transfer(struct acc_vf_migration *acc_vf_dev, + char __user *buf, size_t count, u64 pos, bool iswrite) +{ + struct vfio_device_migration_info *mig_ctl = acc_vf_dev->mig_ctl; + void *data_addr = acc_vf_dev->vf_data; + int ret = 0; + + if (!count) { + dev_err(&acc_vf_dev->vf_dev->dev, + "Qemu operation data size error!\n"); + return -EINVAL; + } + + data_addr += pos - mig_ctl->data_offset; + if (iswrite) { + ret = copy_from_user(data_addr, buf, count) ? + -EFAULT : count; + if (ret == count) + mig_ctl->pending_bytes += count; + } else { + ret = copy_to_user(buf, data_addr, count) ? + -EFAULT : count; + if (ret == count) + mig_ctl->pending_bytes -= count; + } + + return ret; +} + +static size_t acc_vf_migration_rw(struct vfio_pci_device *vdev, + char __user *buf, size_t count, loff_t *ppos, bool iswrite) +{ + unsigned int index = VFIO_PCI_OFFSET_TO_INDEX(*ppos) - + VFIO_PCI_NUM_REGIONS; + struct vfio_pci_region *region = &vdev->region[index]; + struct vfio_device_migration_info *mig_ctl; + struct acc_vf_migration *acc_vf_dev; + u64 pos = *ppos & VFIO_PCI_OFFSET_MASK; + struct hisi_qm *qm; + struct device *dev; + u32 device_state; + int ret = 0; + + if (!region) { + pr_err("Failed to get valid migration region!\n"); + return -EINVAL; + } + + acc_vf_dev = region->data; + qm = acc_vf_dev->vf_qm; + dev = &acc_vf_dev->vf_dev->dev; + mig_ctl = acc_vf_dev->mig_ctl; + if (pos >= region->size) + return -EINVAL; + + count = min(count, (size_t)(region->size - pos)); + + switch (pos) { + case VDM_OFFSET(device_state): + if (count != sizeof(mig_ctl->device_state)) { + ret = -EINVAL; + break; + } + + if (iswrite) { + if (copy_from_user(&device_state, buf, count)) { + ret = -EFAULT; + break; + } + + ret = acc_vf_set_device_state(acc_vf_dev, + device_state) ? ret : count; + } else { + ret = copy_to_user(buf, &mig_ctl->device_state, + count) ? -EFAULT : count; + } + break; + case VDM_OFFSET(reserved): + ret = -EFAULT; + break; + case VDM_OFFSET(pending_bytes): + if (count != sizeof(mig_ctl->pending_bytes)) { + ret = -EINVAL; + break; + } + + if (iswrite) + ret = -EFAULT; + else + ret = copy_to_user(buf, &mig_ctl->pending_bytes, + count) ? -EFAULT : count; + break; + case VDM_OFFSET(data_offset): + if (count != sizeof(mig_ctl->data_offset)) { + ret = -EINVAL; + break; + } + if (iswrite) + ret = copy_from_user(&mig_ctl->data_offset, buf, + count) ? -EFAULT : count; + else + ret = copy_to_user(buf, &mig_ctl->data_offset, + count) ? -EFAULT : count; + break; + case VDM_OFFSET(data_size): + if (count != sizeof(mig_ctl->data_size)) { + ret = -EINVAL; + break; + } + + if (iswrite) + ret = copy_from_user(&mig_ctl->data_size, buf, count) ? + -EFAULT : count; + else + ret = copy_to_user(buf, &mig_ctl->data_size, count) ? + -EFAULT : count; + break; + default: + ret = -EFAULT; + break; + } + + /* Transfer data section */ + if (pos >= mig_ctl->data_offset && + pos < MIGRATION_REGION_SZ) { + ret = acc_vf_data_transfer(acc_vf_dev, buf, + count, pos, iswrite); + if (ret != count) + return ret; + } + + if (mig_ctl->device_state == VFIO_DEVICE_STATE_RESUMING && + mig_ctl->pending_bytes == QM_MATCH_SIZE && + mig_ctl->data_size == QM_MATCH_SIZE) { + /* check the VF match information */ + ret = vf_info_check(qm, acc_vf_dev); + if (ret) { + dev_err(dev, "failed to check match information!\n"); + return -EFAULT; + } + ret = count; + + /* clear the VF match data size */ + mig_ctl->pending_bytes = 0; + mig_ctl->data_size = 0; + } + + return ret; +} + +static int acc_vf_migration_mmap(struct vfio_pci_device *vdev, + struct vfio_pci_region *region, + struct vm_area_struct *vma) +{ + return -EFAULT; +} + +static void acc_vf_migration_release(struct vfio_pci_device *vdev, + struct vfio_pci_region *region) +{ + struct acc_vf_migration *acc_vf_dev = region->data; + + vfio_pci_hisilicon_acc_uninit(acc_vf_dev); +} + +static int acc_vf_migration_add_capability(struct vfio_pci_device *vdev, + struct vfio_pci_region *region, struct vfio_info_cap *caps) +{ + struct vfio_region_info_cap_type cap_type; + + cap_type.header.id = VFIO_REGION_INFO_CAP_TYPE; + cap_type.header.version = 1; + cap_type.type = region->type; + cap_type.subtype = region->subtype; + + return vfio_info_add_capability(caps, &cap_type.header, + sizeof(cap_type)); +} + +static const struct vfio_pci_regops vfio_pci_acc_regops = { + .rw = acc_vf_migration_rw, + .mmap = acc_vf_migration_mmap, + .release = acc_vf_migration_release, + .add_capability = acc_vf_migration_add_capability, +}; + +static int qm_acc_type_init(struct acc_vf_migration *acc_vf_dev) +{ + struct pci_dev *pdev = acc_vf_dev->vf_dev; + + switch (pdev->device) { + case SEC_VF_DEVICE_ID: + acc_vf_dev->acc_type = HISI_SEC; + break; + case HPRE_VF_DEVICE_ID: + acc_vf_dev->acc_type = HISI_HPRE; + break; + case ZIP_VF_DEVICE_ID: + acc_vf_dev->acc_type = HISI_ZIP; + break; + default: + acc_vf_dev->acc_type = 0; + dev_err(&pdev->dev, "failed to check acc type!\n"); + return -EINVAL; + } + + return 0; +} + +static int vf_qm_pci_init(struct pci_dev *pdev, struct hisi_qm *vfqm) +{ + struct device *dev = &pdev->dev; + u32 val; + int ret; + + ret = pci_request_mem_regions(pdev, vfqm->dev_name); + if (ret < 0) { + dev_err(dev, "failed to request mem regions!\n"); + return ret; + } + + vfqm->phys_base = pci_resource_start(pdev, PCI_BASE_BAR); + vfqm->io_base = devm_ioremap(dev, + pci_resource_start(pdev, PCI_BASE_BAR), + pci_resource_len(pdev, PCI_BASE_BAR)); + if (!vfqm->io_base) { + ret = -EIO; + goto err_ioremap; + } + + val = readl(vfqm->io_base + QM_QUE_ISO_CFG_V); + val = val & QM_QUE_ISO_MASK; + if (val) { + vfqm->db_phys_base = pci_resource_start(pdev, PCI_DB_BAR); + vfqm->db_io_base = + devm_ioremap(dev, pci_resource_start(pdev, PCI_DB_BAR), + pci_resource_len(pdev, PCI_DB_BAR)); + if (!vfqm->db_io_base) { + ret = -EIO; + goto err_db_ioremap; + } + } else { + vfqm->db_phys_base = vfqm->phys_base; + vfqm->db_io_base = vfqm->io_base; + } + + vfqm->pdev = pdev; + mutex_init(&vfqm->mailbox_lock); + + /* + * Allow VF devices to be loaded in VM when + * it loaded in migration driver + */ + pci_release_mem_regions(pdev); + + return 0; + +err_db_ioremap: + devm_iounmap(dev, vfqm->io_base); +err_ioremap: + pci_release_mem_regions(pdev); + return ret; +} + +static int acc_vf_dev_init(struct pci_dev *pdev, struct hisi_qm *pf_qm, + struct acc_vf_migration *acc_vf_dev) +{ + struct vfio_device_migration_info *mig_ctl; + struct hisi_qm *vf_qm; + __u64 mig_offset; + void *vf_data; + int ret; + + vf_qm = kzalloc(sizeof(*vf_qm), GFP_KERNEL); + if (!vf_qm) + return -ENOMEM; + + /* get vf qm dev name from pf */ + vf_qm->dev_name = pf_qm->dev_name; + vf_qm->fun_type = QM_HW_VF; + acc_vf_dev->vf_qm = vf_qm; + acc_vf_dev->pf_qm = pf_qm; + + ret = vf_qm_pci_init(pdev, vf_qm); + if (ret) + goto init_qm_error; + + ret = qm_acc_type_init(acc_vf_dev); + if (ret) + goto init_qm_error; + + /* the data region must follow migration info */ + mig_offset = sizeof(*mig_ctl); + mig_ctl = kzalloc(MIGRATION_REGION_SZ, GFP_KERNEL); + if (!mig_ctl) + goto init_qm_error; + + acc_vf_dev->mig_ctl = mig_ctl; + + vf_data = (void *)mig_ctl + mig_offset; + acc_vf_dev->vf_data = vf_data; + + mig_ctl->device_state = VFIO_DEVICE_STATE_RUNNING; + mig_ctl->data_offset = mig_offset; + mig_ctl->data_size = sizeof(struct acc_vf_data); + + return 0; + +init_qm_error: + kfree(vf_qm); + return -ENOMEM; +} + +static int pci_dev_id_check(struct pci_dev *pdev) +{ + switch (pdev->device) { + case SEC_VF_DEVICE_ID: + case HPRE_VF_DEVICE_ID: + case ZIP_VF_DEVICE_ID: + break; + default: + return -EINVAL; + } + + return 0; +} + +int vfio_pci_hisilicon_acc_init(struct vfio_pci_device *vdev) +{ + struct acc_vf_migration *acc_vf_dev; + struct pci_dev *pdev = vdev->pdev; + struct pci_dev *pf_dev, *vf_dev; + struct hisi_qm *pf_qm; + int vf_id, ret; + + pf_dev = pdev->physfn; + vf_dev = pdev; + + if (pci_dev_id_check(vf_dev)) { + dev_err(&pdev->dev, "device not match migration!\n"); + return -ENODEV; + } + + pf_qm = pci_get_drvdata(pf_dev); + if (!pf_qm) { + dev_err(&pdev->dev, "host qm driver not insmod!\n"); + return -EINVAL; + } + if (pf_qm->ver < QM_HW_V3) { + dev_err(&pdev->dev, + "device can't support migration! version: 0x%x\n", + pf_qm->ver); + return -ENODEV; + } + + vf_id = PCI_FUNC(vf_dev->devfn); + acc_vf_dev = kzalloc(sizeof(*acc_vf_dev), GFP_KERNEL); + if (!acc_vf_dev) + return -ENOMEM; + + if (pci_num_vf(pf_dev) <= 0) { + dev_info(&pdev->dev, "vf device: %s, vf id: %d\n", + pf_qm->dev_name, vf_id); + return -EINVAL; + } + acc_vf_dev->vf_id = vf_id; + acc_vf_dev->pf_dev = pf_dev; + acc_vf_dev->vf_dev = vf_dev; + mutex_init(&acc_vf_dev->reflock); + + ret = acc_vf_dev_init(pdev, pf_qm, acc_vf_dev); + if (ret) { + kfree(acc_vf_dev); + return -ENOMEM; + } + + ret = vfio_pci_register_dev_region(vdev, + VFIO_REGION_TYPE_MIGRATION, + VFIO_REGION_SUBTYPE_MIGRATION, + &vfio_pci_acc_regops, + MIGRATION_REGION_SZ, + VFIO_REGION_INFO_FLAG_READ | + VFIO_REGION_INFO_FLAG_WRITE, + acc_vf_dev); + if (ret) { + dev_info(&pdev->dev, "register vfio_pci_acc_regops Error!\n"); + goto register_error; + } + + return 0; + +register_error: + vfio_pci_hisilicon_acc_uninit(acc_vf_dev); + return ret; +} + +void vfio_pci_hisilicon_acc_uninit(struct acc_vf_migration *acc_vf_dev) +{ + struct device *dev = &acc_vf_dev->vf_dev->dev; + struct hisi_qm *qm = acc_vf_dev->vf_qm; + + kfree(acc_vf_dev->mig_ctl); + acc_vf_dev->mig_ctl = NULL; + + devm_iounmap(dev, qm->io_base); + kfree(qm); + + kfree(acc_vf_dev->regions); + acc_vf_dev->regions = NULL; + acc_vf_dev->num_regions = 0; + + kfree(acc_vf_dev); +} + diff --git a/drivers/vfio/pci/hisilicon/acc_vf_migration.h b/drivers/vfio/pci/hisilicon/acc_vf_migration.h new file mode 100644 index 0000000..26c79e4 --- /dev/null +++ b/drivers/vfio/pci/hisilicon/acc_vf_migration.h @@ -0,0 +1,170 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2021 HiSilicon Limited. */ + +#ifndef ACC_MIG_H +#define ACC_MIG_H + +#include <linux/mdev.h> +#include <linux/pci.h> +#include <linux/vfio.h> + +#include "../vfio_pci_private.h" +#include "../../../drivers/crypto/hisilicon/qm.h" + +#define MIGRATION_REGION_SZ (sizeof(struct acc_vf_data) + \ + sizeof(struct vfio_device_migration_info)) +#define VFIO_DEV_DBG_LEN 256 +#define VFIO_DBG_LOG_LEN 16 +#define VFIO_DEVFN_MASK 0xFF +#define SEC_VF_DEVICE_ID 0xa256 +#define HPRE_VF_DEVICE_ID 0xa259 +#define ZIP_VF_DEVICE_ID 0xa251 + +#define PCI_BASE_BAR 2 +#define PCI_DB_BAR 4 +#define MB_POLL_PERIOD_US 10 +#define MB_POLL_TIMEOUT_US 1000 +#define QM_CACHE_WB_START 0x204 +#define QM_CACHE_WB_DONE 0x208 +#define QM_MB_CMD_PAUSE_QM 0xe +#define QM_ABNORMAL_INT_STATUS 0x100008 +#define QM_IFC_INT_STATUS 0x0028 +#define SEC_CORE_INT_STATUS 0x301008 +#define HPRE_HAC_INT_STATUS 0x301800 +#define HZIP_CORE_INT_STATUS 0x3010AC +#define ERROR_CHECK_TIMEOUT 100 +#define CHECK_DELAY_TIME 100 +#define QM_QUE_ISO_MASK 0x01 + +#define QM_SQC_VFT_BASE_SHIFT_V2 28 +#define QM_SQC_VFT_BASE_MASK_V2 GENMASK(15, 0) +#define QM_SQC_VFT_NUM_SHIFT_V2 45 +#define QM_SQC_VFT_NUM_MASK_V2 GENMASK(9, 0) + +/* mailbox */ +#define QM_MB_CMD_SQC_BT 0x4 +#define QM_MB_CMD_CQC_BT 0x5 +#define QM_MB_CMD_SQC_VFT_V2 0x6 + +#define QM_MB_CMD_SEND_BASE 0x300 +#define QM_MB_BUSY_SHIFT 13 +#define QM_MB_OP_SHIFT 14 +#define QM_MB_CMD_DATA_ADDR_L 0x304 +#define QM_MB_CMD_DATA_ADDR_H 0x308 +#define QM_MB_MAX_WAIT_CNT 6000 + +/* doorbell */ +#define QM_DOORBELL_CMD_SQ 0 +#define QM_DOORBELL_CMD_CQ 1 +#define QM_DOORBELL_SQ_CQ_BASE_V2 0x1000 +#define QM_DOORBELL_EQ_AEQ_BASE_V2 0x2000 +#define QM_DB_CMD_SHIFT_V2 12 +#define QM_DB_RAND_SHIFT_V2 16 +#define QM_DB_INDEX_SHIFT_V2 32 +#define QM_DB_PRIORITY_SHIFT_V2 48 + +/* RW regs */ +#define QM_REGS_MAX_LEN 7 +#define QM_REG_ADDR_OFFSET 0x0004 + +#define QM_XQC_ADDR_OFFSET 32U +#define QM_VF_AEQ_INT_MASK 0x0004 +#define QM_VF_EQ_INT_MASK 0x000c +#define QM_IFC_INT_SOURCE_V 0x0020 +#define QM_IFC_INT_MASK 0x0024 +#define QM_IFC_INT_SET_V 0x002c +#define QM_QUE_ISO_CFG_V 0x0030 + +#define QM_EQC_DW0 0X3000 +#define QM_AEQC_DW0 0X3020 + +struct qm_mailbox { + __le16 w0; + __le16 queue_num; + __le32 base_l; + __le32 base_h; + __le32 rsvd; +}; + +enum acc_type { + HISI_SEC = 0x1, + HISI_HPRE = 0x2, + HISI_ZIP = 0x3, +}; + +struct vf_acc_type { + const char *name; + u32 type; +}; + +enum mig_debug_cmd { + STATE_SAVE, + STATE_RESUME, + MB_TEST, + MIG_DATA_DUMP, + MIG_DEV_SHOW, +}; + +static const char * const vf_dev_state[] = { + "Stop", + "Running", + "Saving", + "Running & Saving", + "Resuming", +}; + +#define QM_MATCH_SIZE 32L +struct acc_vf_data { + /* QM match information */ + u32 qp_num; + u32 acc_type; + u32 que_iso_cfg; + u32 qp_base; + /* QM reserved 4 match information */ + u32 qm_rsv_state[4]; + + /* QM RW regs */ + u32 aeq_int_mask; + u32 eq_int_mask; + u32 ifc_int_source; + u32 ifc_int_mask; + u32 ifc_int_set; + + /* + * QM_VF_MB has 4 regs don't need to migration + * mailbox regs writeback value will cause + * hardware to perform command operations + */ + + /* QM_EQC_DW has 7 regs */ + u32 qm_eqc_dw[7]; + + /* QM_AEQC_DW has 7 regs */ + u32 qm_aeqc_dw[7]; + + /* QM reserved 5 regs */ + u32 qm_rsv_regs[5]; + + /* qm memory init information */ + dma_addr_t eqe_dma; + dma_addr_t aeqe_dma; + dma_addr_t sqc_dma; + dma_addr_t cqc_dma; +}; + +struct acc_vf_migration { + struct pci_dev *pf_dev; + struct pci_dev *vf_dev; + struct hisi_qm *pf_qm; + struct hisi_qm *vf_qm; + int vf_id; + u8 acc_type; + + struct vfio_device_migration_info *mig_ctl; + struct acc_vf_data *vf_data; + struct vfio_pci_region *regions; + int num_regions; +}; + +#endif /* ACC_MIG_H */ +

Add debugfs debugging interface to live migration driver

Signed-off-by: Longfang Liu liulongfang@huawei.com --- drivers/vfio/pci/hisilicon/acc_vf_migration.c | 193 ++++++++++++++++++++++++++ drivers/vfio/pci/hisilicon/acc_vf_migration.h | 2 + 2 files changed, 195 insertions(+)

diff --git a/drivers/vfio/pci/hisilicon/acc_vf_migration.c b/drivers/vfio/pci/hisilicon/acc_vf_migration.c index 45382c7..b0f7f09 100644 --- a/drivers/vfio/pci/hisilicon/acc_vf_migration.c +++ b/drivers/vfio/pci/hisilicon/acc_vf_migration.c @@ -16,6 +16,9 @@

#define VDM_OFFSET(x) offsetof(struct vfio_device_migration_info, x) void vfio_pci_hisilicon_acc_uninit(struct acc_vf_migration *acc_vf_dev); +static void vf_debugfs_exit(struct acc_vf_migration *acc_vf_dev); +static struct dentry *mig_debugfs_root; +static int mig_root_ref;

/* return 0 mailbox ready, -ETIMEDOUT hardware timeout */ static int qm_wait_mb_ready(struct hisi_qm *qm) @@ -934,6 +937,193 @@ static const struct vfio_pci_regops vfio_pci_acc_regops = { .add_capability = acc_vf_migration_add_capability, };

+static ssize_t acc_vf_debug_read(struct file *filp, char __user *buffer, + size_t count, loff_t *pos) +{ + char buf[VFIO_DEV_DBG_LEN]; + int len; + + len = scnprintf(buf, VFIO_DEV_DBG_LEN, "%s\n", + "echo 0: test vf data store\n" + "echo 1: test vf data writeback\n" + "echo 2: test vf send mailbox\n" + "echo 3: dump vf dev data\n" + "echo 4: dump migration state\n"); + + return simple_read_from_buffer(buffer, count, pos, buf, len); +} + +static ssize_t acc_vf_debug_write(struct file *filp, const char __user *buffer, + size_t count, loff_t *pos) +{ + struct acc_vf_migration *acc_vf_dev = filp->private_data; + struct device *dev = &acc_vf_dev->vf_dev->dev; + struct hisi_qm *qm = acc_vf_dev->vf_qm; + char tbuf[VFIO_DEV_DBG_LEN]; + unsigned long val; + u64 data; + int len, ret; + + if (*pos) + return 0; + + if (count >= VFIO_DEV_DBG_LEN) + return -ENOSPC; + + len = simple_write_to_buffer(tbuf, VFIO_DEV_DBG_LEN - 1, + pos, buffer, count); + if (len < 0) + return len; + tbuf[len] = '\0'; + if (kstrtoul(tbuf, 0, &val)) + return -EFAULT; + + switch (val) { + case STATE_SAVE: + ret = vf_qm_state_save(qm, acc_vf_dev); + if (ret) + return -EINVAL; + break; + case STATE_RESUME: + ret = vf_qm_state_resume(qm, acc_vf_dev); + if (ret) + return -EINVAL; + break; + case MB_TEST: + data = readl(qm->io_base + QM_MB_CMD_SEND_BASE); + dev_info(dev, "debug mailbox addr: 0x%lx, mailbox val: 0x%llx\n", + (uintptr_t)qm->io_base, data); + break; + case MIG_DATA_DUMP: + dev_info(dev, "dumped vf migration data:\n"); + print_hex_dump(KERN_INFO, "Mig Data:", DUMP_PREFIX_OFFSET, + VFIO_DBG_LOG_LEN, 1, + (unsigned char *)acc_vf_dev->vf_data, + sizeof(struct acc_vf_data), false); + break; + case MIG_DEV_SHOW: + if (!acc_vf_dev->mig_ctl) + dev_info(dev, "migration region have release!\n"); + else + dev_info(dev, + "device state: %u\n" + "pending bytes: %llu\n" + "data offset: %llu\n" + "data size: %llu\n" + "data addr: 0x%lx\n", + acc_vf_dev->mig_ctl->device_state, + acc_vf_dev->mig_ctl->pending_bytes, + acc_vf_dev->mig_ctl->data_offset, + acc_vf_dev->mig_ctl->data_size, + (uintptr_t)acc_vf_dev->vf_data); + break; + default: + return -EINVAL; + } + + return count; +} + +static const struct file_operations acc_vf_debug_fops = { + .owner = THIS_MODULE, + .open = simple_open, + .read = acc_vf_debug_read, + .write = acc_vf_debug_write, +}; + +static ssize_t acc_vf_state_read(struct file *filp, char __user *buffer, + size_t count, loff_t *pos) +{ + struct acc_vf_migration *acc_vf_dev = filp->private_data; + char buf[VFIO_DEV_DBG_LEN]; + u32 state; + int len; + + if (!acc_vf_dev->mig_ctl) { + len = scnprintf(buf, VFIO_DEV_DBG_LEN, "%s\n", "Invalid\n"); + } else { + state = acc_vf_dev->mig_ctl->device_state; + switch (state) { + case VFIO_DEVICE_STATE_RUNNING: + len = scnprintf(buf, VFIO_DEV_DBG_LEN, "%s\n", + "RUNNING\n"); + break; + case VFIO_DEVICE_STATE_SAVING | VFIO_DEVICE_STATE_RUNNING: + len = scnprintf(buf, VFIO_DEV_DBG_LEN, "%s\n", + "SAVING and RUNNING\n"); + break; + case VFIO_DEVICE_STATE_SAVING: + len = scnprintf(buf, VFIO_DEV_DBG_LEN, "%s\n", + "SAVING\n"); + break; + case VFIO_DEVICE_STATE_STOP: + len = scnprintf(buf, VFIO_DEV_DBG_LEN, "%s\n", + "STOP\n"); + break; + case VFIO_DEVICE_STATE_RESUMING: + len = scnprintf(buf, VFIO_DEV_DBG_LEN, "%s\n", + "RESUMING\n"); + break; + default: + len = scnprintf(buf, VFIO_DEV_DBG_LEN, "%s\n", + "Error\n"); + } + } + + return simple_read_from_buffer(buffer, count, pos, buf, len); +} + +static const struct file_operations acc_vf_state_fops = { + .owner = THIS_MODULE, + .open = simple_open, + .read = acc_vf_state_read, +}; + +static void vf_debugfs_init(struct acc_vf_migration *acc_vf_dev) +{ + char name[VFIO_DEV_DBG_LEN]; + int node_id; + + if (!mig_root_ref) + mig_debugfs_root = debugfs_create_dir("vfio_acc", NULL); + mutex_lock(&acc_vf_dev->reflock); + mig_root_ref++; + mutex_unlock(&acc_vf_dev->reflock); + + node_id = dev_to_node(&acc_vf_dev->vf_dev->dev); + if (node_id < 0) + node_id = 0; + + if (acc_vf_dev->acc_type == HISI_SEC) + scnprintf(name, VFIO_DEV_DBG_LEN, "sec_vf%d-%d", + node_id, acc_vf_dev->vf_id); + else if (acc_vf_dev->acc_type == HISI_HPRE) + scnprintf(name, VFIO_DEV_DBG_LEN, "hpre_vf%d-%d", + node_id, acc_vf_dev->vf_id); + else + scnprintf(name, VFIO_DEV_DBG_LEN, "zip_vf%d-%d", + node_id, acc_vf_dev->vf_id); + + acc_vf_dev->debug_root = debugfs_create_dir(name, mig_debugfs_root); + + debugfs_create_file("debug", 0644, acc_vf_dev->debug_root, + acc_vf_dev, &acc_vf_debug_fops); + debugfs_create_file("state", 0444, acc_vf_dev->debug_root, + acc_vf_dev, &acc_vf_state_fops); +} + +static void vf_debugfs_exit(struct acc_vf_migration *acc_vf_dev) +{ + debugfs_remove_recursive(acc_vf_dev->debug_root); + + mutex_lock(&acc_vf_dev->reflock); + mig_root_ref--; + mutex_unlock(&acc_vf_dev->reflock); + + if (!mig_root_ref) + debugfs_remove_recursive(mig_debugfs_root); +} + static int qm_acc_type_init(struct acc_vf_migration *acc_vf_dev) { struct pci_dev *pdev = acc_vf_dev->vf_dev; @@ -1137,6 +1327,8 @@ int vfio_pci_hisilicon_acc_init(struct vfio_pci_device *vdev) goto register_error; }

+ vf_debugfs_init(acc_vf_dev); + return 0;

register_error: @@ -1159,6 +1351,7 @@ void vfio_pci_hisilicon_acc_uninit(struct acc_vf_migration *acc_vf_dev) acc_vf_dev->regions = NULL; acc_vf_dev->num_regions = 0;

+ vf_debugfs_exit(acc_vf_dev); kfree(acc_vf_dev); }

diff --git a/drivers/vfio/pci/hisilicon/acc_vf_migration.h b/drivers/vfio/pci/hisilicon/acc_vf_migration.h index 26c79e4..38d4035 100644 --- a/drivers/vfio/pci/hisilicon/acc_vf_migration.h +++ b/drivers/vfio/pci/hisilicon/acc_vf_migration.h @@ -159,11 +159,13 @@ struct acc_vf_migration { struct hisi_qm *vf_qm; int vf_id; u8 acc_type; + struct mutex reflock;

struct vfio_device_migration_info *mig_ctl; struct acc_vf_data *vf_data; struct vfio_pci_region *regions; int num_regions; + struct dentry *debug_root; };

#endif /* ACC_MIG_H */