[PATCH V4 08/10] accel/amdxdna: Add suspend and resume
From: Lizhi Hou
Date: Fri Oct 11 2024 - 19:13:39 EST
Implement PCI power management suspend and resume callbacks.
Co-developed-by: Narendra Gutta <VenkataNarendraKumar.Gutta@xxxxxxx>
Signed-off-by: Narendra Gutta <VenkataNarendraKumar.Gutta@xxxxxxx>
Co-developed-by: Xiaoming Ren <xiaoming.ren@xxxxxxx>
Signed-off-by: Xiaoming Ren <xiaoming.ren@xxxxxxx>
Co-developed-by: Min Ma <min.ma@xxxxxxx>
Signed-off-by: Min Ma <min.ma@xxxxxxx>
Signed-off-by: Lizhi Hou <lizhi.hou@xxxxxxx>
---
drivers/accel/amdxdna/aie2_ctx.c | 30 ++++++
drivers/accel/amdxdna/aie2_pci.c | 4 +
drivers/accel/amdxdna/aie2_pci.h | 2 +
drivers/accel/amdxdna/amdxdna_ctx.c | 26 +++++
drivers/accel/amdxdna/amdxdna_ctx.h | 2 +
drivers/accel/amdxdna/amdxdna_pci_drv.c | 120 +++++++++++++++++++++++-
drivers/accel/amdxdna/amdxdna_pci_drv.h | 4 +
7 files changed, 185 insertions(+), 3 deletions(-)
diff --git a/drivers/accel/amdxdna/aie2_ctx.c b/drivers/accel/amdxdna/aie2_ctx.c
index f9010a902c99..8da842731103 100644
--- a/drivers/accel/amdxdna/aie2_ctx.c
+++ b/drivers/accel/amdxdna/aie2_ctx.c
@@ -179,6 +179,36 @@ static int aie2_hwctx_wait_for_idle(struct amdxdna_hwctx *hwctx)
return 0;
}
+void aie2_hwctx_suspend(struct amdxdna_hwctx *hwctx)
+{
+ struct amdxdna_dev *xdna = hwctx->client->xdna;
+
+ /*
+ * Command timeout is unlikely. But if it happens, it doesn't
+ * break the system. aie2_hwctx_stop() will destroy mailbox
+ * and abort all commands.
+ */
+ drm_WARN_ON(&xdna->ddev, !mutex_is_locked(&xdna->dev_lock));
+ aie2_hwctx_wait_for_idle(hwctx);
+ aie2_hwctx_stop(xdna, hwctx, NULL);
+ hwctx->old_status = hwctx->status;
+ hwctx->status = HWCTX_STAT_STOP;
+}
+
+void aie2_hwctx_resume(struct amdxdna_hwctx *hwctx)
+{
+ struct amdxdna_dev *xdna = hwctx->client->xdna;
+
+ /*
+ * The resume path cannot guarantee that mailbox channel can be
+ * regenerated. If this happen, when submit message to this
+ * mailbox channel, error will return.
+ */
+ drm_WARN_ON(&xdna->ddev, !mutex_is_locked(&xdna->dev_lock));
+ hwctx->status = hwctx->old_status;
+ aie2_hwctx_restart(xdna, hwctx);
+}
+
static void
aie2_sched_notify(struct amdxdna_sched_job *job)
{
diff --git a/drivers/accel/amdxdna/aie2_pci.c b/drivers/accel/amdxdna/aie2_pci.c
index 6017826a7104..7a1729bed62d 100644
--- a/drivers/accel/amdxdna/aie2_pci.c
+++ b/drivers/accel/amdxdna/aie2_pci.c
@@ -499,10 +499,14 @@ static void aie2_fini(struct amdxdna_dev *xdna)
const struct amdxdna_dev_ops aie2_ops = {
.init = aie2_init,
.fini = aie2_fini,
+ .resume = aie2_hw_start,
+ .suspend = aie2_hw_stop,
.hwctx_init = aie2_hwctx_init,
.hwctx_fini = aie2_hwctx_fini,
.hwctx_config = aie2_hwctx_config,
.cmd_submit = aie2_cmd_submit,
.cmd_wait = aie2_cmd_wait,
.hmm_invalidate = aie2_hmm_invalidate,
+ .hwctx_suspend = aie2_hwctx_suspend,
+ .hwctx_resume = aie2_hwctx_resume,
};
diff --git a/drivers/accel/amdxdna/aie2_pci.h b/drivers/accel/amdxdna/aie2_pci.h
index 81877d9c0542..bbcc3d85e13c 100644
--- a/drivers/accel/amdxdna/aie2_pci.h
+++ b/drivers/accel/amdxdna/aie2_pci.h
@@ -234,6 +234,8 @@ int aie2_sync_bo(struct amdxdna_hwctx *hwctx, struct amdxdna_sched_job *job,
int aie2_hwctx_init(struct amdxdna_hwctx *hwctx);
void aie2_hwctx_fini(struct amdxdna_hwctx *hwctx);
int aie2_hwctx_config(struct amdxdna_hwctx *hwctx, u32 type, u64 value, void *buf, u32 size);
+void aie2_hwctx_suspend(struct amdxdna_hwctx *hwctx);
+void aie2_hwctx_resume(struct amdxdna_hwctx *hwctx);
int aie2_cmd_submit(struct amdxdna_hwctx *hwctx, struct amdxdna_sched_job *job, u64 *seq);
int aie2_cmd_wait(struct amdxdna_hwctx *hwctx, u64 seq, u32 timeout);
void aie2_hmm_invalidate(struct amdxdna_gem_obj *abo, unsigned long cur_seq);
diff --git a/drivers/accel/amdxdna/amdxdna_ctx.c b/drivers/accel/amdxdna/amdxdna_ctx.c
index b76640e1fdd0..6a1db715129e 100644
--- a/drivers/accel/amdxdna/amdxdna_ctx.c
+++ b/drivers/accel/amdxdna/amdxdna_ctx.c
@@ -59,6 +59,32 @@ static struct dma_fence *amdxdna_fence_create(struct amdxdna_hwctx *hwctx)
return &fence->base;
}
+void amdxdna_hwctx_suspend(struct amdxdna_client *client)
+{
+ struct amdxdna_dev *xdna = client->xdna;
+ struct amdxdna_hwctx *hwctx;
+ int next = 0;
+
+ drm_WARN_ON(&xdna->ddev, !mutex_is_locked(&xdna->dev_lock));
+ mutex_lock(&client->hwctx_lock);
+ idr_for_each_entry_continue(&client->hwctx_idr, hwctx, next)
+ xdna->dev_info->ops->hwctx_suspend(hwctx);
+ mutex_unlock(&client->hwctx_lock);
+}
+
+void amdxdna_hwctx_resume(struct amdxdna_client *client)
+{
+ struct amdxdna_dev *xdna = client->xdna;
+ struct amdxdna_hwctx *hwctx;
+ int next = 0;
+
+ drm_WARN_ON(&xdna->ddev, !mutex_is_locked(&xdna->dev_lock));
+ mutex_lock(&client->hwctx_lock);
+ idr_for_each_entry_continue(&client->hwctx_idr, hwctx, next)
+ xdna->dev_info->ops->hwctx_resume(hwctx);
+ mutex_unlock(&client->hwctx_lock);
+}
+
static void amdxdna_hwctx_destroy_rcu(struct amdxdna_hwctx *hwctx,
struct srcu_struct *ss)
{
diff --git a/drivers/accel/amdxdna/amdxdna_ctx.h b/drivers/accel/amdxdna/amdxdna_ctx.h
index 65f9c1dfe32c..1db8944b1956 100644
--- a/drivers/accel/amdxdna/amdxdna_ctx.h
+++ b/drivers/accel/amdxdna/amdxdna_ctx.h
@@ -141,6 +141,8 @@ static inline u32 amdxdna_hwctx_col_map(struct amdxdna_hwctx *hwctx)
void amdxdna_job_put(struct amdxdna_sched_job *job);
void amdxdna_hwctx_remove_all(struct amdxdna_client *client);
+void amdxdna_hwctx_suspend(struct amdxdna_client *client);
+void amdxdna_hwctx_resume(struct amdxdna_client *client);
int amdxdna_cmd_submit(struct amdxdna_client *client,
u32 cmd_bo_hdls, u32 *arg_bo_hdls, u32 arg_bo_cnt,
diff --git a/drivers/accel/amdxdna/amdxdna_pci_drv.c b/drivers/accel/amdxdna/amdxdna_pci_drv.c
index 5c1e863825e0..92113d83e861 100644
--- a/drivers/accel/amdxdna/amdxdna_pci_drv.c
+++ b/drivers/accel/amdxdna/amdxdna_pci_drv.c
@@ -13,11 +13,14 @@
#include <drm/gpu_scheduler.h>
#include <linux/iommu.h>
#include <linux/pci.h>
+#include <linux/pm_runtime.h>
#include "amdxdna_ctx.h"
#include "amdxdna_gem.h"
#include "amdxdna_pci_drv.h"
+#define AMDXDNA_AUTOSUSPEND_DELAY 5000 /* miliseconds */
+
/*
* Bind the driver base on (vendor_id, device_id) pair and later use the
* (device_id, rev_id) pair as a key to select the devices. The devices with
@@ -45,9 +48,17 @@ static int amdxdna_drm_open(struct drm_device *ddev, struct drm_file *filp)
struct amdxdna_client *client;
int ret;
+ ret = pm_runtime_resume_and_get(ddev->dev);
+ if (ret) {
+ XDNA_ERR(xdna, "Failed to get rpm, ret %d", ret);
+ return ret;
+ }
+
client = kzalloc(sizeof(*client), GFP_KERNEL);
- if (!client)
- return -ENOMEM;
+ if (!client) {
+ ret = -ENOMEM;
+ goto put_rpm;
+ }
client->pid = pid_nr(filp->pid);
client->xdna = xdna;
@@ -83,6 +94,9 @@ static int amdxdna_drm_open(struct drm_device *ddev, struct drm_file *filp)
iommu_sva_unbind_device(client->sva);
failed:
kfree(client);
+put_rpm:
+ pm_runtime_mark_last_busy(ddev->dev);
+ pm_runtime_put_autosuspend(ddev->dev);
return ret;
}
@@ -105,6 +119,8 @@ static void amdxdna_drm_close(struct drm_device *ddev, struct drm_file *filp)
XDNA_DBG(xdna, "pid %d closed", client->pid);
kfree(client);
+ pm_runtime_mark_last_busy(ddev->dev);
+ pm_runtime_put_autosuspend(ddev->dev);
}
static int amdxdna_flush(struct file *f, fl_owner_t id)
@@ -182,10 +198,11 @@ amdxdna_get_dev_info(struct pci_dev *pdev)
static int amdxdna_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
+ struct device *dev = &pdev->dev;
struct amdxdna_dev *xdna;
int ret;
- xdna = devm_drm_dev_alloc(&pdev->dev, &amdxdna_drm_drv, typeof(*xdna), ddev);
+ xdna = devm_drm_dev_alloc(dev, &amdxdna_drm_drv, typeof(*xdna), ddev);
if (IS_ERR(xdna))
return PTR_ERR(xdna);
@@ -211,12 +228,19 @@ static int amdxdna_probe(struct pci_dev *pdev, const struct pci_device_id *id)
goto failed_dev_fini;
}
+ pm_runtime_set_autosuspend_delay(dev, AMDXDNA_AUTOSUSPEND_DELAY);
+ pm_runtime_use_autosuspend(dev);
+ pm_runtime_allow(dev);
+
ret = drm_dev_register(&xdna->ddev, 0);
if (ret) {
XDNA_ERR(xdna, "DRM register failed, ret %d", ret);
+ pm_runtime_forbid(dev);
goto failed_sysfs_fini;
}
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_autosuspend(dev);
return 0;
failed_sysfs_fini:
@@ -231,8 +255,12 @@ static int amdxdna_probe(struct pci_dev *pdev, const struct pci_device_id *id)
static void amdxdna_remove(struct pci_dev *pdev)
{
struct amdxdna_dev *xdna = pci_get_drvdata(pdev);
+ struct device *dev = &pdev->dev;
struct amdxdna_client *client;
+ pm_runtime_get_noresume(dev);
+ pm_runtime_forbid(dev);
+
drm_dev_unplug(&xdna->ddev);
amdxdna_sysfs_fini(xdna);
@@ -254,11 +282,97 @@ static void amdxdna_remove(struct pci_dev *pdev)
mutex_unlock(&xdna->dev_lock);
}
+static int amdxdna_dev_suspend_nolock(struct amdxdna_dev *xdna)
+{
+ if (xdna->dev_info->ops->suspend)
+ xdna->dev_info->ops->suspend(xdna);
+
+ return 0;
+}
+
+static int amdxdna_dev_resume_nolock(struct amdxdna_dev *xdna)
+{
+ if (xdna->dev_info->ops->resume)
+ return xdna->dev_info->ops->resume(xdna);
+
+ return 0;
+}
+
+static int amdxdna_pmops_suspend(struct device *dev)
+{
+ struct amdxdna_dev *xdna = pci_get_drvdata(to_pci_dev(dev));
+ struct amdxdna_client *client;
+
+ mutex_lock(&xdna->dev_lock);
+ list_for_each_entry(client, &xdna->client_list, node)
+ amdxdna_hwctx_suspend(client);
+
+ amdxdna_dev_suspend_nolock(xdna);
+ mutex_unlock(&xdna->dev_lock);
+
+ return 0;
+}
+
+static int amdxdna_pmops_resume(struct device *dev)
+{
+ struct amdxdna_dev *xdna = pci_get_drvdata(to_pci_dev(dev));
+ struct amdxdna_client *client;
+ int ret;
+
+ XDNA_INFO(xdna, "firmware resuming...");
+ mutex_lock(&xdna->dev_lock);
+ ret = amdxdna_dev_resume_nolock(xdna);
+ if (ret) {
+ XDNA_ERR(xdna, "resume NPU firmware failed");
+ mutex_unlock(&xdna->dev_lock);
+ return ret;
+ }
+
+ XDNA_INFO(xdna, "hardware context resuming...");
+ list_for_each_entry(client, &xdna->client_list, node)
+ amdxdna_hwctx_resume(client);
+ mutex_unlock(&xdna->dev_lock);
+
+ return 0;
+}
+
+static int amdxdna_rpmops_suspend(struct device *dev)
+{
+ struct amdxdna_dev *xdna = pci_get_drvdata(to_pci_dev(dev));
+ int ret;
+
+ mutex_lock(&xdna->dev_lock);
+ ret = amdxdna_dev_suspend_nolock(xdna);
+ mutex_unlock(&xdna->dev_lock);
+
+ XDNA_DBG(xdna, "Runtime suspend done ret: %d", ret);
+ return ret;
+}
+
+static int amdxdna_rpmops_resume(struct device *dev)
+{
+ struct amdxdna_dev *xdna = pci_get_drvdata(to_pci_dev(dev));
+ int ret;
+
+ mutex_lock(&xdna->dev_lock);
+ ret = amdxdna_dev_resume_nolock(xdna);
+ mutex_unlock(&xdna->dev_lock);
+
+ XDNA_DBG(xdna, "Runtime resume done ret: %d", ret);
+ return ret;
+}
+
+static const struct dev_pm_ops amdxdna_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(amdxdna_pmops_suspend, amdxdna_pmops_resume)
+ SET_RUNTIME_PM_OPS(amdxdna_rpmops_suspend, amdxdna_rpmops_resume, NULL)
+};
+
static struct pci_driver amdxdna_pci_driver = {
.name = KBUILD_MODNAME,
.id_table = pci_ids,
.probe = amdxdna_probe,
.remove = amdxdna_remove,
+ .driver.pm = &amdxdna_pm_ops,
};
module_pci_driver(amdxdna_pci_driver);
diff --git a/drivers/accel/amdxdna/amdxdna_pci_drv.h b/drivers/accel/amdxdna/amdxdna_pci_drv.h
index 0324e73094b2..01b516743a00 100644
--- a/drivers/accel/amdxdna/amdxdna_pci_drv.h
+++ b/drivers/accel/amdxdna/amdxdna_pci_drv.h
@@ -28,10 +28,14 @@ struct amdxdna_sched_job;
struct amdxdna_dev_ops {
int (*init)(struct amdxdna_dev *xdna);
void (*fini)(struct amdxdna_dev *xdna);
+ int (*resume)(struct amdxdna_dev *xdna);
+ void (*suspend)(struct amdxdna_dev *xdna);
int (*hwctx_init)(struct amdxdna_hwctx *hwctx);
void (*hwctx_fini)(struct amdxdna_hwctx *hwctx);
int (*hwctx_config)(struct amdxdna_hwctx *hwctx, u32 type, u64 value, void *buf, u32 size);
void (*hmm_invalidate)(struct amdxdna_gem_obj *abo, unsigned long cur_seq);
+ void (*hwctx_suspend)(struct amdxdna_hwctx *hwctx);
+ void (*hwctx_resume)(struct amdxdna_hwctx *hwctx);
int (*cmd_submit)(struct amdxdna_hwctx *hwctx, struct amdxdna_sched_job *job, u64 *seq);
int (*cmd_wait)(struct amdxdna_hwctx *hwctx, u64 seq, u32 timeout);
};
--
2.34.1