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pds_core: publish events to the clients 

When the Core device gets an event from the device, or notices
the device FW to be up or down, it needs to send those events
on to the clients that have an event handler.  Add the code to
pass along the events to the clients.

The entry points pdsc_register_notify() and pdsc_unregister_notify()
are EXPORTed for other drivers that want to listen for these events.

Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Shannon Nelson 2023-04-19 10:04:26 -07:00 committed by David S. Miller
parent 10659034c6
commit d24c28278a
4 changed files with 39 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/ethernet/amd/pds_core/adminq.c
View File

@ -29,11 +29,13 @@ static int pdsc_process_notifyq(struct pdsc_qcq *qcq)
case PDS_EVENT_LINK_CHANGE:
dev_info(pdsc->dev, "NotifyQ LINK_CHANGE ecode %d eid %lld\n",
ecode, eid);
pdsc_notify(PDS_EVENT_LINK_CHANGE, comp);
break;
case PDS_EVENT_RESET:
dev_info(pdsc->dev, "NotifyQ RESET ecode %d eid %lld\n",
ecode, eid);
pdsc_notify(PDS_EVENT_RESET, comp);
break;
case PDS_EVENT_XCVR:

32
drivers/net/ethernet/amd/pds_core/core.c
View File

@ -6,6 +6,25 @@
#include "core.h"
static BLOCKING_NOTIFIER_HEAD(pds_notify_chain);
int pdsc_register_notify(struct notifier_block *nb)
{
return blocking_notifier_chain_register(&pds_notify_chain, nb);
}
EXPORT_SYMBOL_GPL(pdsc_register_notify);
void pdsc_unregister_notify(struct notifier_block *nb)
{
blocking_notifier_chain_unregister(&pds_notify_chain, nb);
}
EXPORT_SYMBOL_GPL(pdsc_unregister_notify);
void pdsc_notify(unsigned long event, void *data)
{
blocking_notifier_call_chain(&pds_notify_chain, event, data);
}
void pdsc_intr_free(struct pdsc *pdsc, int index)
{
struct pdsc_intr_info *intr_info;
@ -494,12 +513,19 @@ void pdsc_stop(struct pdsc *pdsc)
static void pdsc_fw_down(struct pdsc *pdsc)
{
union pds_core_notifyq_comp reset_event = {
.reset.ecode = cpu_to_le16(PDS_EVENT_RESET),
.reset.state = 0,
};
if (test_and_set_bit(PDSC_S_FW_DEAD, &pdsc->state)) {
dev_err(pdsc->dev, "%s: already happening\n", __func__);
return;
}
/* Notify clients of fw_down */
devlink_health_report(pdsc->fw_reporter, "FW down reported", pdsc);
pdsc_notify(PDS_EVENT_RESET, &reset_event);
pdsc_stop(pdsc);
pdsc_teardown(pdsc, PDSC_TEARDOWN_RECOVERY);
@ -507,6 +533,10 @@ static void pdsc_fw_down(struct pdsc *pdsc)
static void pdsc_fw_up(struct pdsc *pdsc)
{
union pds_core_notifyq_comp reset_event = {
.reset.ecode = cpu_to_le16(PDS_EVENT_RESET),
.reset.state = 1,
};
int err;
if (!test_bit(PDSC_S_FW_DEAD, &pdsc->state)) {
@ -522,9 +552,11 @@ static void pdsc_fw_up(struct pdsc *pdsc)
if (err)
goto err_out;
/* Notify clients of fw_up */
pdsc->fw_recoveries++;
devlink_health_reporter_state_update(pdsc->fw_reporter,
DEVLINK_HEALTH_REPORTER_STATE_HEALTHY);
pdsc_notify(PDS_EVENT_RESET, &reset_event);
return;

3
drivers/net/ethernet/amd/pds_core/core.h
View File

@ -297,6 +297,9 @@ int pdsc_start(struct pdsc *pdsc);
void pdsc_stop(struct pdsc *pdsc);
void pdsc_health_thread(struct work_struct *work);
int pdsc_register_notify(struct notifier_block *nb);
void pdsc_unregister_notify(struct notifier_block *nb);
void pdsc_notify(unsigned long event, void *data);
int pdsc_auxbus_dev_add(struct pdsc *cf, struct pdsc *pf);
int pdsc_auxbus_dev_del(struct pdsc *cf, struct pdsc *pf);

2
include/linux/pds/pds_common.h
View File

@ -60,6 +60,8 @@ enum pds_core_logical_qtype {
PDS_CORE_QTYPE_MAX = 16 /* don't change - used in struct size */
};
int pdsc_register_notify(struct notifier_block *nb);
void pdsc_unregister_notify(struct notifier_block *nb);
void *pdsc_get_pf_struct(struct pci_dev *vf_pdev);
int pds_client_register(struct pci_dev *pf_pdev, char *devname);
int pds_client_unregister(struct pci_dev *pf_pdev, u16 client_id);