From: Weili Qian qianweili@huawei.com
mainline inclusion from mainline-master commit d7ea53395b723b1a87b9c0afb3301cc33fbe35e6 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I475PF?from=project-issue CVE: NA
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git/co...
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Accelerator devices support runtime PM to reduce power consumption. This patch adds the runtime PM suspend/resume callbacks to the accelerator devices.
Signed-off-by: Weili Qian qianweili@huawei.com Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Reviewed-by: Hao Fang fanghao11@huawei.com Reviewed-by: Mingqiang Ling lingmingqiang@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- drivers/crypto/hisilicon/qm.c | 118 ++++++++++++++++++++++++++++++++++ drivers/crypto/hisilicon/qm.h | 2 + 2 files changed, 120 insertions(+)
diff --git a/drivers/crypto/hisilicon/qm.c b/drivers/crypto/hisilicon/qm.c index e417cd05f612..dbe162a0bd02 100644 --- a/drivers/crypto/hisilicon/qm.c +++ b/drivers/crypto/hisilicon/qm.c @@ -5692,6 +5692,124 @@ int hisi_qm_init(struct hisi_qm *qm) } EXPORT_SYMBOL_GPL(hisi_qm_init);
+ +static int qm_prepare_for_suspend(struct hisi_qm *qm) +{ + struct pci_dev *pdev = qm->pdev; + int ret; + u32 val; + + ret = qm->ops->set_msi(qm, false); + if (ret) { + pci_err(pdev, "failed to disable MSI before suspending!\n"); + return ret; + } + + /* shutdown OOO register */ + writel(ACC_MASTER_GLOBAL_CTRL_SHUTDOWN, + qm->io_base + ACC_MASTER_GLOBAL_CTRL); + + ret = readl_relaxed_poll_timeout(qm->io_base + ACC_MASTER_TRANS_RETURN, + val, + (val == ACC_MASTER_TRANS_RETURN_RW), + POLL_PERIOD, POLL_TIMEOUT); + if (ret) { + pci_emerg(pdev, "Bus lock! Please reset system.\n"); + return ret; + } + + ret = qm_set_pf_mse(qm, false); + if (ret) + pci_err(pdev, "failed to disable MSE before suspending!\n"); + + return ret; +} + +static int qm_rebuild_for_resume(struct hisi_qm *qm) +{ + struct pci_dev *pdev = qm->pdev; + int ret; + + ret = qm_set_pf_mse(qm, true); + if (ret) { + pci_err(pdev, "failed to enable MSE after resuming!\n"); + return ret; + } + + ret = qm->ops->set_msi(qm, true); + if (ret) { + pci_err(pdev, "failed to enable MSI after resuming!\n"); + return ret; + } + + ret = qm_dev_hw_init(qm); + if (ret) { + pci_err(pdev, "failed to init device after resuming\n"); + return ret; + } + + qm_cmd_init(qm); + hisi_qm_dev_err_init(qm); + + return 0; +} + +/** + * hisi_qm_suspend() - Runtime suspend of given device. + * @dev: device to suspend. + * + * Function that suspend the device. + */ +int hisi_qm_suspend(struct device *dev) +{ + struct pci_dev *pdev = to_pci_dev(dev); + struct hisi_qm *qm = pci_get_drvdata(pdev); + int ret; + + pci_info(pdev, "entering suspended state\n"); + + ret = hisi_qm_stop(qm, QM_NORMAL); + if (ret) { + pci_err(pdev, "failed to stop qm(%d)\n", ret); + return ret; + } + + ret = qm_prepare_for_suspend(qm); + if (ret) + pci_err(pdev, "failed to prepare suspended(%d)\n", ret); + + return ret; +} +EXPORT_SYMBOL_GPL(hisi_qm_suspend); + +/** + * hisi_qm_resume() - Runtime resume of given device. + * @dev: device to resume. + * + * Function that resume the device. + */ +int hisi_qm_resume(struct device *dev) +{ + struct pci_dev *pdev = to_pci_dev(dev); + struct hisi_qm *qm = pci_get_drvdata(pdev); + int ret; + + pci_info(pdev, "resuming from suspend state\n"); + + ret = qm_rebuild_for_resume(qm); + if (ret) { + pci_err(pdev, "failed to rebuild resume(%d)\n", ret); + return ret; + } + + ret = hisi_qm_start(qm); + if (ret) + pci_err(pdev, "failed to start qm(%d)\n", ret); + + return 0; +} +EXPORT_SYMBOL_GPL(hisi_qm_resume); + MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Zhou Wang wangzhou1@hisilicon.com"); MODULE_DESCRIPTION("HiSilicon Accelerator queue manager driver"); diff --git a/drivers/crypto/hisilicon/qm.h b/drivers/crypto/hisilicon/qm.h index 0e5df1c8b3f5..59e16464d03d 100644 --- a/drivers/crypto/hisilicon/qm.h +++ b/drivers/crypto/hisilicon/qm.h @@ -431,5 +431,7 @@ void hisi_qm_dev_shutdown(struct pci_dev *pdev); void hisi_qm_wait_task_finish(struct hisi_qm *qm, struct hisi_qm_list *qm_list); int hisi_qm_alg_register(struct hisi_qm *qm, struct hisi_qm_list *qm_list); void hisi_qm_alg_unregister(struct hisi_qm *qm, struct hisi_qm_list *qm_list); +int hisi_qm_resume(struct device *dev); +int hisi_qm_suspend(struct device *dev); void hisi_qm_regs_dump(struct seq_file *s, struct debugfs_regset32 *regset); #endif