[PATCH v2 1/4] PCI: endpoint: refactor pci_epf_alloc_space()

[Niklas Cassel <cassel@kernel.org>]

Refactor pci_epf_alloc_space() to take epc_features as a parameter.
This is a preparation patch needed for further cleanups.

Reviewed-by: Frank Li <Frank.Li@nxp.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
---
 drivers/pci/endpoint/functions/pci-epf-ntb.c  | 2 +-
 drivers/pci/endpoint/functions/pci-epf-test.c | 5 ++---
 drivers/pci/endpoint/functions/pci-epf-vntb.c | 4 ++--
 drivers/pci/endpoint/pci-epf-core.c           | 6 ++++--
 include/linux/pci-epf.h                       | 4 +++-
 5 files changed, 12 insertions(+), 9 deletions(-)

diff --git a/drivers/pci/endpoint/functions/pci-epf-ntb.c b/drivers/pci/endpoint/functions/pci-epf-ntb.c
index 0553946005c4..43cd309ce22f 100644
--- a/drivers/pci/endpoint/functions/pci-epf-ntb.c
+++ b/drivers/pci/endpoint/functions/pci-epf-ntb.c
@@ -1067,7 +1067,7 @@ static int epf_ntb_config_spad_bar_alloc(struct epf_ntb *ntb,
 	else if (size < ctrl_size + spad_size)
 		return -EINVAL;
 
-	base = pci_epf_alloc_space(epf, size, barno, align, type);
+	base = pci_epf_alloc_space(epf, size, barno, epc_features, type);
 	if (!base) {
 		dev_err(dev, "%s intf: Config/Status/SPAD alloc region fail\n",
 			pci_epc_interface_string(type));
diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c
index 18c80002d3bd..15bfa7d83489 100644
--- a/drivers/pci/endpoint/functions/pci-epf-test.c
+++ b/drivers/pci/endpoint/functions/pci-epf-test.c
@@ -848,7 +848,7 @@ static int pci_epf_test_alloc_space(struct pci_epf *epf)
 	}
 
 	base = pci_epf_alloc_space(epf, test_reg_size, test_reg_bar,
-				   epc_features->align, PRIMARY_INTERFACE);
+				   epc_features, PRIMARY_INTERFACE);
 	if (!base) {
 		dev_err(dev, "Failed to allocated register space\n");
 		return -ENOMEM;
@@ -866,8 +866,7 @@ static int pci_epf_test_alloc_space(struct pci_epf *epf)
 			continue;
 
 		base = pci_epf_alloc_space(epf, bar_size[bar], bar,
-					   epc_features->align,
-					   PRIMARY_INTERFACE);
+					   epc_features, PRIMARY_INTERFACE);
 		if (!base)
 			dev_err(dev, "Failed to allocate space for BAR%d\n",
 				bar);
diff --git a/drivers/pci/endpoint/functions/pci-epf-vntb.c b/drivers/pci/endpoint/functions/pci-epf-vntb.c
index e75a2af77328..ba509d67188b 100644
--- a/drivers/pci/endpoint/functions/pci-epf-vntb.c
+++ b/drivers/pci/endpoint/functions/pci-epf-vntb.c
@@ -446,7 +446,7 @@ static int epf_ntb_config_spad_bar_alloc(struct epf_ntb *ntb)
 	else if (size < ctrl_size + spad_size)
 		return -EINVAL;
 
-	base = pci_epf_alloc_space(epf, size, barno, align, 0);
+	base = pci_epf_alloc_space(epf, size, barno, epc_features, 0);
 	if (!base) {
 		dev_err(dev, "Config/Status/SPAD alloc region fail\n");
 		return -ENOMEM;
@@ -550,7 +550,7 @@ static int epf_ntb_db_bar_init(struct epf_ntb *ntb)
 
 	barno = ntb->epf_ntb_bar[BAR_DB];
 
-	mw_addr = pci_epf_alloc_space(ntb->epf, size, barno, align, 0);
+	mw_addr = pci_epf_alloc_space(ntb->epf, size, barno, epc_features, 0);
 	if (!mw_addr) {
 		dev_err(dev, "Failed to allocate OB address\n");
 		return -ENOMEM;
diff --git a/drivers/pci/endpoint/pci-epf-core.c b/drivers/pci/endpoint/pci-epf-core.c
index 2c32de667937..1d405fd61a2a 100644
--- a/drivers/pci/endpoint/pci-epf-core.c
+++ b/drivers/pci/endpoint/pci-epf-core.c
@@ -251,14 +251,16 @@ EXPORT_SYMBOL_GPL(pci_epf_free_space);
  * @epf: the EPF device to whom allocate the memory
  * @size: the size of the memory that has to be allocated
  * @bar: the BAR number corresponding to the allocated register space
- * @align: alignment size for the allocation region
+ * @epc_features: the features provided by the EPC specific to this EPF
  * @type: Identifies if the allocation is for primary EPC or secondary EPC
  *
  * Invoke to allocate memory for the PCI EPF register space.
  */
 void *pci_epf_alloc_space(struct pci_epf *epf, size_t size, enum pci_barno bar,
-			  size_t align, enum pci_epc_interface_type type)
+			  const struct pci_epc_features *epc_features,
+			  enum pci_epc_interface_type type)
 {
+	size_t align = epc_features->align;
 	struct pci_epf_bar *epf_bar;
 	dma_addr_t phys_addr;
 	struct pci_epc *epc;
diff --git a/include/linux/pci-epf.h b/include/linux/pci-epf.h
index 77b146e0f672..adee6a1b35db 100644
--- a/include/linux/pci-epf.h
+++ b/include/linux/pci-epf.h
@@ -15,6 +15,7 @@
 #include <linux/pci.h>
 
 struct pci_epf;
+struct pci_epc_features;
 enum pci_epc_interface_type;
 
 enum pci_barno {
@@ -216,7 +217,8 @@ int __pci_epf_register_driver(struct pci_epf_driver *driver,
 			      struct module *owner);
 void pci_epf_unregister_driver(struct pci_epf_driver *driver);
 void *pci_epf_alloc_space(struct pci_epf *epf, size_t size, enum pci_barno bar,
-			  size_t align, enum pci_epc_interface_type type);
+			  const struct pci_epc_features *epc_features,
+			  enum pci_epc_interface_type type);
 void pci_epf_free_space(struct pci_epf *epf, void *addr, enum pci_barno bar,
 			enum pci_epc_interface_type type);
 int pci_epf_bind(struct pci_epf *epf);
-- 
2.43.0