Commit d7ea5339 authored by Weili Qian's avatar Weili Qian Committed by Herbert Xu
Browse files

crypto: hisilicon - add runtime PM ops 



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: default avatarWeili Qian <qianweili@huawei.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 1295292d

drivers/crypto/hisilicon/qm.c

+118 −0
Original line number Diff line number Diff line
@@ -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");

drivers/crypto/hisilicon/qm.h

+2 −0
Original line number Diff line number Diff line
@@ -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