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NVIDIA: SAUCE: PCI: endpoint: Add core_deinit() callback support

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BugLink: https://bugs.launchpad.net/bugs/2072591

The endpoint function driver should undo the things done in core_init()
and stop hardware access before deinitializing the controller. Add
core_deinit() callback support for function driver to do this cleanup.
This core_deinit() callback should be invoked by the controller driver
before deinitializing the controller.

Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
Reviewed-by: Nagarjuna Kristam <nkristam@nvidia.com>
Reviewed-by: Manikanta Maddireddy <mmaddireddy@nvidia.com>
Reviewed-by: Bitan Biswas <bbiswas@nvidia.com>
Tested-by: Nagarjuna Kristam <nkristam@nvidia.com>
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Acked-by: Jacob Martin <jacob.martin@canonical.com>
Acked-by: Noah Wager <noah.wager@canonical.com>
Signed-off-by: Noah Wager <noah.wager@canonical.com>
This commit is contained in:
Vidya Sagar
2022-10-13 23:48:12 +05:30
committed by Noah Wager
parent 4bf3f84ca2
commit f52d383d3d
3 changed files with 29 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/pci/endpoint/pci-epc-core.c
+26
View File
@@ -783,6 +783,32 @@ void pci_epc_bme_notify(struct pci_epc *epc)
}
EXPORT_SYMBOL_GPL(pci_epc_bme_notify);
/**
* pci_epc_deinit_notify() - Notify the EPF device that EPC device's core
* deinitialization is scheduled.
* @epc: the EPC device whose core deinitialization is scheduled
*
* Invoke to Notify the EPF device that the EPC device's deinitialization
* is scheduled.
*/
void pci_epc_deinit_notify(struct pci_epc *epc)
{
struct pci_epf *epf;
if (!epc || IS_ERR(epc))
return;
mutex_lock(&epc->list_lock);
list_for_each_entry(epf, &epc->pci_epf, list) {
mutex_lock(&epf->lock);
if (epf->event_ops->core_deinit)
epf->event_ops->core_deinit(epf);
mutex_unlock(&epf->lock);
}
mutex_unlock(&epc->list_lock);
}
EXPORT_SYMBOL_GPL(pci_epc_deinit_notify);
/**
* pci_epc_destroy() - destroy the EPC device
* @epc: the EPC device that has to be destroyed
include/linux/pci-epc.h
+1
View File
@@ -201,6 +201,7 @@ void pci_epc_linkup(struct pci_epc *epc);
void pci_epc_linkdown(struct pci_epc *epc);
void pci_epc_init_notify(struct pci_epc *epc);
void pci_epc_bme_notify(struct pci_epc *epc);
void pci_epc_deinit_notify(struct pci_epc *epc);
void pci_epc_remove_epf(struct pci_epc *epc, struct pci_epf *epf,
enum pci_epc_interface_type type);
int pci_epc_write_header(struct pci_epc *epc, u8 func_no, u8 vfunc_no,
include/linux/pci-epf.h
+2
View File
@@ -70,12 +70,14 @@ struct pci_epf_ops {
/**
* struct pci_epc_event_ops - Callbacks for capturing the EPC events
* @core_init: Callback for the EPC initialization complete event
* @core_deinit: Callback for the EPC deinitialization schedule event
* @link_up: Callback for the EPC link up event
* @link_down: Callback for the EPC link down event
* @bme: Callback for the EPC BME (Bus Master Enable) event
*/
struct pci_epc_event_ops {
int (*core_init)(struct pci_epf *epf);
int (*core_deinit)(struct pci_epf *epf);
int (*link_up)(struct pci_epf *epf);
int (*link_down)(struct pci_epf *epf);
int (*bme)(struct pci_epf *epf);