diff options
Diffstat (limited to 'drivers/accel/qaic/qaic_drv.c')
| -rw-r--r-- | drivers/accel/qaic/qaic_drv.c | 116 |
1 files changed, 115 insertions, 1 deletions
diff --git a/drivers/accel/qaic/qaic_drv.c b/drivers/accel/qaic/qaic_drv.c index e162f4b8a262..4c70bd949d53 100644 --- a/drivers/accel/qaic/qaic_drv.c +++ b/drivers/accel/qaic/qaic_drv.c @@ -30,6 +30,7 @@ #include "qaic.h" #include "qaic_debugfs.h" #include "qaic_ras.h" +#include "qaic_ssr.h" #include "qaic_timesync.h" #include "sahara.h" @@ -270,6 +271,13 @@ static int qaic_create_drm_device(struct qaic_device *qdev, s32 partition_id) return ret; } + ret = qaic_sysfs_init(qddev); + if (ret) { + drm_dev_unregister(drm); + pci_dbg(qdev->pdev, "qaic_sysfs_init failed %d\n", ret); + return ret; + } + qaic_debugfs_init(qddev); return ret; @@ -281,6 +289,7 @@ static void qaic_destroy_drm_device(struct qaic_device *qdev, s32 partition_id) struct drm_device *drm = to_drm(qddev); struct qaic_user *usr; + qaic_sysfs_remove(qddev); drm_dev_unregister(drm); qddev->partition_id = 0; /* @@ -382,6 +391,7 @@ void qaic_dev_reset_clean_local_state(struct qaic_device *qdev) qaic_notify_reset(qdev); /* start tearing things down */ + qaic_clean_up_ssr(qdev); for (i = 0; i < qdev->num_dbc; ++i) release_dbc(qdev, i); } @@ -431,11 +441,18 @@ static struct qaic_device *create_qdev(struct pci_dev *pdev, qdev->qts_wq = qaicm_wq_init(drm, "qaic_ts"); if (IS_ERR(qdev->qts_wq)) return NULL; + qdev->ssr_wq = qaicm_wq_init(drm, "qaic_ssr"); + if (IS_ERR(qdev->ssr_wq)) + return NULL; ret = qaicm_srcu_init(drm, &qdev->dev_lock); if (ret) return NULL; + ret = qaic_ssr_init(qdev, drm); + if (ret) + pci_info(pdev, "QAIC SSR crashdump collection not supported.\n"); + qdev->qddev = qddev; qdev->pdev = pdev; qddev->qdev = qdev; @@ -545,7 +562,7 @@ static int init_msi(struct qaic_device *qdev, struct pci_dev *pdev) qdev->dbc[i].irq = pci_irq_vector(pdev, qdev->single_msi ? 0 : i + 1); if (!qdev->single_msi) disable_irq_nosync(qdev->dbc[i].irq); - INIT_WORK(&qdev->dbc[i].poll_work, irq_polling_work); + INIT_WORK(&qdev->dbc[i].poll_work, qaic_irq_polling_work); } } @@ -660,6 +677,92 @@ static const struct pci_error_handlers qaic_pci_err_handler = { .reset_done = qaic_pci_reset_done, }; +static bool qaic_is_under_reset(struct qaic_device *qdev) +{ + int rcu_id; + bool ret; + + rcu_id = srcu_read_lock(&qdev->dev_lock); + ret = qdev->dev_state != QAIC_ONLINE; + srcu_read_unlock(&qdev->dev_lock, rcu_id); + return ret; +} + +static bool qaic_data_path_busy(struct qaic_device *qdev) +{ + bool ret = false; + int dev_rcu_id; + int i; + + dev_rcu_id = srcu_read_lock(&qdev->dev_lock); + if (qdev->dev_state != QAIC_ONLINE) { + srcu_read_unlock(&qdev->dev_lock, dev_rcu_id); + return false; + } + for (i = 0; i < qdev->num_dbc; i++) { + struct dma_bridge_chan *dbc = &qdev->dbc[i]; + unsigned long flags; + int ch_rcu_id; + + ch_rcu_id = srcu_read_lock(&dbc->ch_lock); + if (!dbc->usr || !dbc->in_use) { + srcu_read_unlock(&dbc->ch_lock, ch_rcu_id); + continue; + } + spin_lock_irqsave(&dbc->xfer_lock, flags); + ret = !list_empty(&dbc->xfer_list); + spin_unlock_irqrestore(&dbc->xfer_lock, flags); + srcu_read_unlock(&dbc->ch_lock, ch_rcu_id); + if (ret) + break; + } + srcu_read_unlock(&qdev->dev_lock, dev_rcu_id); + return ret; +} + +static int qaic_pm_suspend(struct device *dev) +{ + struct qaic_device *qdev = pci_get_drvdata(to_pci_dev(dev)); + + dev_dbg(dev, "Suspending..\n"); + if (qaic_data_path_busy(qdev)) { + dev_dbg(dev, "Device's datapath is busy. Aborting suspend..\n"); + return -EBUSY; + } + if (qaic_is_under_reset(qdev)) { + dev_dbg(dev, "Device is under reset. Aborting suspend..\n"); + return -EBUSY; + } + qaic_mqts_ch_stop_timer(qdev->mqts_ch); + qaic_pci_reset_prepare(qdev->pdev); + pci_save_state(qdev->pdev); + pci_disable_device(qdev->pdev); + pci_set_power_state(qdev->pdev, PCI_D3hot); + return 0; +} + +static int qaic_pm_resume(struct device *dev) +{ + struct qaic_device *qdev = pci_get_drvdata(to_pci_dev(dev)); + int ret; + + dev_dbg(dev, "Resuming..\n"); + pci_set_power_state(qdev->pdev, PCI_D0); + pci_restore_state(qdev->pdev); + ret = pci_enable_device(qdev->pdev); + if (ret) { + dev_err(dev, "pci_enable_device failed on resume %d\n", ret); + return ret; + } + pci_set_master(qdev->pdev); + qaic_pci_reset_done(qdev->pdev); + return 0; +} + +static const struct dev_pm_ops qaic_pm_ops = { + SYSTEM_SLEEP_PM_OPS(qaic_pm_suspend, qaic_pm_resume) +}; + static struct pci_driver qaic_pci_driver = { .name = QAIC_NAME, .id_table = qaic_ids, @@ -667,6 +770,9 @@ static struct pci_driver qaic_pci_driver = { .remove = qaic_pci_remove, .shutdown = qaic_pci_shutdown, .err_handler = &qaic_pci_err_handler, + .driver = { + .pm = pm_sleep_ptr(&qaic_pm_ops), + }, }; static int __init qaic_init(void) @@ -702,9 +808,16 @@ static int __init qaic_init(void) ret = qaic_ras_register(); if (ret) pr_debug("qaic: qaic_ras_register failed %d\n", ret); + ret = qaic_ssr_register(); + if (ret) { + pr_debug("qaic: qaic_ssr_register failed %d\n", ret); + goto free_bootlog; + } return 0; +free_bootlog: + qaic_bootlog_unregister(); free_mhi: mhi_driver_unregister(&qaic_mhi_driver); free_pci: @@ -730,6 +843,7 @@ static void __exit qaic_exit(void) * reinitializing the link_up state after the cleanup is done. */ link_up = true; + qaic_ssr_unregister(); qaic_ras_unregister(); qaic_bootlog_unregister(); qaic_timesync_deinit(); |