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crypto: hisilicon - add runtime PM ops

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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>
This commit is contained in:
Weili Qian 2021-08-13 17:50:06 +08:00 committed by Herbert Xu
parent 1295292d65
commit d7ea53395b
2 changed files with 120 additions and 0 deletions
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118
drivers/crypto/hisilicon/qm.c
View File

@ -5692,6 +5692,124 @@ err_pci_init:
}
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");

2
drivers/crypto/hisilicon/qm.h
View File

@ -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