Introduce a pci_loaded flag similar to mem_active, and define
mark_cxl_pci_loaded() to indicate when the PCI driver has initialized.
This will be used by other CXL components, such as cxl_acpi and the soft
reserved resource handling logic, to coordinate initialization and ensure
that dependent operations proceed only after both cxl_pci and cxl_mem
drivers are ready.
Co-developed-by: Nathan Fontenot <Nathan.Fontenot@xxxxxxx>
Signed-off-by: Nathan Fontenot <Nathan.Fontenot@xxxxxxx>
Co-developed-by: Terry Bowman <terry.bowman@xxxxxxx>
Signed-off-by: Terry Bowman <terry.bowman@xxxxxxx>
Signed-off-by: Smita Koralahalli <Smita.KoralahalliChannabasappa@xxxxxxx>
---
drivers/cxl/core/suspend.c | 8 ++++++++
drivers/cxl/cxlpci.h | 1 +
drivers/cxl/pci.c | 2 ++
3 files changed, 11 insertions(+)
diff --git a/drivers/cxl/core/suspend.c b/drivers/cxl/core/suspend.c
index 5ba4b4de0e33..72818a2c8ec8 100644
--- a/drivers/cxl/core/suspend.c
+++ b/drivers/cxl/core/suspend.c
@@ -3,8 +3,10 @@
#include <linux/atomic.h>
#include <linux/export.h>
#include "cxlmem.h"
+#include "cxlpci.h"
static atomic_t mem_active;
+static atomic_t pci_loaded;
bool cxl_mem_active(void)
{
@@ -25,3 +27,9 @@ void cxl_mem_active_dec(void)
atomic_dec(&mem_active);
}
EXPORT_SYMBOL_NS_GPL(cxl_mem_active_dec, "CXL");
+
+void mark_cxl_pci_loaded(void)
+{
+ atomic_inc(&pci_loaded);
+}
+EXPORT_SYMBOL_NS_GPL(mark_cxl_pci_loaded, "CXL");
diff --git a/drivers/cxl/cxlpci.h b/drivers/cxl/cxlpci.h
index 54e219b0049e..5a811ac63fcf 100644
--- a/drivers/cxl/cxlpci.h
+++ b/drivers/cxl/cxlpci.h
@@ -135,4 +135,5 @@ void read_cdat_data(struct cxl_port *port);
void cxl_cor_error_detected(struct pci_dev *pdev);
pci_ers_result_t cxl_error_detected(struct pci_dev *pdev,
pci_channel_state_t state);
+void mark_cxl_pci_loaded(void);
#endif /* __CXL_PCI_H__ */
diff --git a/drivers/cxl/pci.c b/drivers/cxl/pci.c
index 785aa2af5eaa..b019bd324dba 100644
--- a/drivers/cxl/pci.c
+++ b/drivers/cxl/pci.c
@@ -1189,6 +1189,8 @@ static int __init cxl_pci_driver_init(void)
if (rc)
pci_unregister_driver(&cxl_pci_driver);
+ mark_cxl_pci_loaded();
+
return rc;
}
--
2.17.1
