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accel/qaic: Increase number of in_reset states

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'in_reset' holds the state of the device. As part of bringup, the device
needs to be queried to check if it's in a valid state. Add a new state
that indicates that the device is coming up, but not ready for users
yet. Rename to 'dev_state' to better describe the variable.

Signed-off-by: Carl Vanderlip <quic_carlv@quicinc.com>
Reviewed-by: Pranjal Ramajor Asha Kanojiya <quic_pkanojiy@quicinc.com>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Signed-off-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Reviewed-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231117174337.20174-2-quic_jhugo@quicinc.com
This commit is contained in:
Carl Vanderlip 2023-11-17 10:43:36 -07:00 committed by Jeffrey Hugo
parent ff3670877e
commit 44df9a2a13
4 changed files with 28 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/accel/qaic/qaic.h
View File

@ -31,6 +31,15 @@
#define to_drm(qddev) (&(qddev)->drm)
#define to_accel_kdev(qddev) (to_drm(qddev)->accel->kdev) /* Return Linux device of accel node */
enum __packed dev_states {
/* Device is offline or will be very soon */
QAIC_OFFLINE,
/* Device is booting, not clear if it's in a usable state */
QAIC_BOOT,
/* Device is fully operational */
QAIC_ONLINE,
};
extern bool datapath_polling;
struct qaic_user {
@ -121,8 +130,8 @@ struct qaic_device {
struct workqueue_struct *cntl_wq;
/* Synchronizes all the users of device during cleanup */
struct srcu_struct dev_lock;
/* true: Device under reset; false: Device not under reset */
bool in_reset;
/* Track the state of the device during resets */
enum dev_states dev_state;
/* true: single MSI is used to operate device */
bool single_msi;
/*

5
drivers/accel/qaic/qaic_control.c
View File

@ -1022,7 +1022,8 @@ static void *msg_xfer(struct qaic_device *qdev, struct wrapper_list *wrappers, u
int xfer_count = 0;
int retry_count;
if (qdev->in_reset) {
/* Allow QAIC_BOOT state since we need to check control protocol version */
if (qdev->dev_state == QAIC_OFFLINE) {
mutex_unlock(&qdev->cntl_mutex);
return ERR_PTR(-ENODEV);
}
@ -1306,7 +1307,7 @@ int qaic_manage_ioctl(struct drm_device *dev, void *data, struct drm_file *file_
qdev = usr->qddev->qdev;
qdev_rcu_id = srcu_read_lock(&qdev->dev_lock);
if (qdev->in_reset) {
if (qdev->dev_state != QAIC_ONLINE) {
srcu_read_unlock(&qdev->dev_lock, qdev_rcu_id);
srcu_read_unlock(&usr->qddev_lock, usr_rcu_id);
return -ENODEV;

16
drivers/accel/qaic/qaic_data.c
View File

@ -690,7 +690,7 @@ int qaic_create_bo_ioctl(struct drm_device *dev, void *data, struct drm_file *fi
qdev = usr->qddev->qdev;
qdev_rcu_id = srcu_read_lock(&qdev->dev_lock);
if (qdev->in_reset) {
if (qdev->dev_state != QAIC_ONLINE) {
ret = -ENODEV;
goto unlock_dev_srcu;
}
@ -749,7 +749,7 @@ int qaic_mmap_bo_ioctl(struct drm_device *dev, void *data, struct drm_file *file
qdev = usr->qddev->qdev;
qdev_rcu_id = srcu_read_lock(&qdev->dev_lock);
if (qdev->in_reset) {
if (qdev->dev_state != QAIC_ONLINE) {
ret = -ENODEV;
goto unlock_dev_srcu;
}
@ -970,7 +970,7 @@ int qaic_attach_slice_bo_ioctl(struct drm_device *dev, void *data, struct drm_fi
qdev = usr->qddev->qdev;
qdev_rcu_id = srcu_read_lock(&qdev->dev_lock);
if (qdev->in_reset) {
if (qdev->dev_state != QAIC_ONLINE) {
ret = -ENODEV;
goto unlock_dev_srcu;
}
@ -1341,7 +1341,7 @@ static int __qaic_execute_bo_ioctl(struct drm_device *dev, void *data, struct dr
qdev = usr->qddev->qdev;
qdev_rcu_id = srcu_read_lock(&qdev->dev_lock);
if (qdev->in_reset) {
if (qdev->dev_state != QAIC_ONLINE) {
ret = -ENODEV;
goto unlock_dev_srcu;
}
@ -1497,7 +1497,7 @@ void irq_polling_work(struct work_struct *work)
rcu_id = srcu_read_lock(&dbc->ch_lock);
while (1) {
if (dbc->qdev->in_reset) {
if (dbc->qdev->dev_state != QAIC_ONLINE) {
srcu_read_unlock(&dbc->ch_lock, rcu_id);
return;
}
@ -1687,7 +1687,7 @@ int qaic_wait_bo_ioctl(struct drm_device *dev, void *data, struct drm_file *file
qdev = usr->qddev->qdev;
qdev_rcu_id = srcu_read_lock(&qdev->dev_lock);
if (qdev->in_reset) {
if (qdev->dev_state != QAIC_ONLINE) {
ret = -ENODEV;
goto unlock_dev_srcu;
}
@ -1756,7 +1756,7 @@ int qaic_perf_stats_bo_ioctl(struct drm_device *dev, void *data, struct drm_file
qdev = usr->qddev->qdev;
qdev_rcu_id = srcu_read_lock(&qdev->dev_lock);
if (qdev->in_reset) {
if (qdev->dev_state != QAIC_ONLINE) {
ret = -ENODEV;
goto unlock_dev_srcu;
}
@ -1847,7 +1847,7 @@ int qaic_detach_slice_bo_ioctl(struct drm_device *dev, void *data, struct drm_fi
qdev = usr->qddev->qdev;
qdev_rcu_id = srcu_read_lock(&qdev->dev_lock);
if (qdev->in_reset) {
if (qdev->dev_state != QAIC_ONLINE) {
ret = -ENODEV;
goto unlock_dev_srcu;
}

12
drivers/accel/qaic/qaic_drv.c
View File

@ -64,7 +64,7 @@ static int qaic_open(struct drm_device *dev, struct drm_file *file)
int ret;
rcu_id = srcu_read_lock(&qdev->dev_lock);
if (qdev->in_reset) {
if (qdev->dev_state != QAIC_ONLINE) {
ret = -ENODEV;
goto dev_unlock;
}
@ -121,7 +121,7 @@ static void qaic_postclose(struct drm_device *dev, struct drm_file *file)
if (qddev) {
qdev = qddev->qdev;
qdev_rcu_id = srcu_read_lock(&qdev->dev_lock);
if (!qdev->in_reset) {
if (qdev->dev_state == QAIC_ONLINE) {
qaic_release_usr(qdev, usr);
for (i = 0; i < qdev->num_dbc; ++i)
if (qdev->dbc[i].usr && qdev->dbc[i].usr->handle == usr->handle)
@ -254,7 +254,7 @@ static int qaic_mhi_probe(struct mhi_device *mhi_dev, const struct mhi_device_id
qdev = pci_get_drvdata(to_pci_dev(mhi_dev->mhi_cntrl->cntrl_dev));
qdev->in_reset = false;
qdev->dev_state = QAIC_ONLINE;
dev_set_drvdata(&mhi_dev->dev, qdev);
qdev->cntl_ch = mhi_dev;
@ -291,7 +291,7 @@ static void qaic_notify_reset(struct qaic_device *qdev)
{
int i;
qdev->in_reset = true;
qdev->dev_state = QAIC_OFFLINE;
/* wake up any waiters to avoid waiting for timeouts at sync */
wake_all_cntl(qdev);
for (i = 0; i < qdev->num_dbc; ++i)
@ -313,7 +313,7 @@ void qaic_dev_reset_clean_local_state(struct qaic_device *qdev, bool exit_reset)
release_dbc(qdev, i);
if (exit_reset)
qdev->in_reset = false;
qdev->dev_state = QAIC_ONLINE;
}
static void cleanup_qdev(struct qaic_device *qdev)
@ -550,7 +550,7 @@ static void qaic_pci_reset_done(struct pci_dev *pdev)
{
struct qaic_device *qdev = pci_get_drvdata(pdev);
qdev->in_reset = false;
qdev->dev_state = QAIC_ONLINE;
qaic_mhi_reset_done(qdev->mhi_cntrl);
}