[PATCH v2 1/3] PCI: endpoint: add epc_feature argument for pci_epf_free_space()

[Jerome Brunet <jbrunet@baylibre.com>]

Add epc_feature argument for pci_epf_free_space(), same as
pci_epf_alloc_space(). Doing so will allow to better handle
the iATU alignment requirements.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
---
 drivers/pci/endpoint/functions/pci-epf-ntb.c  |  3 ++-
 drivers/pci/endpoint/functions/pci-epf-test.c |  2 ++
 drivers/pci/endpoint/functions/pci-epf-vntb.c | 16 +++++++++++++---
 drivers/pci/endpoint/pci-epf-core.c           |  2 ++
 include/linux/pci-epf.h                       |  1 +
 5 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/drivers/pci/endpoint/functions/pci-epf-ntb.c b/drivers/pci/endpoint/functions/pci-epf-ntb.c
index e01a98e74d211174db3075c20457a3183f37e0a5..44775c41c10b90a56b1167f3f3869a60c686cf9e 100644
--- a/drivers/pci/endpoint/functions/pci-epf-ntb.c
+++ b/drivers/pci/endpoint/functions/pci-epf-ntb.c
@@ -957,7 +957,8 @@ static void epf_ntb_config_spad_bar_free(struct epf_ntb *ntb)
 		ntb_epc = ntb->epc[type];
 		barno = ntb_epc->epf_ntb_bar[BAR_CONFIG];
 		if (ntb_epc->reg)
-			pci_epf_free_space(epf, ntb_epc->reg, barno, type);
+			pci_epf_free_space(epf, ntb_epc->reg, barno,
+					   ntb_epc->epc_features, type);
 	}
 }
 
diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c
index 50eb4106369f41afa00ed3ae58c84922e0a49e51..8d5df47967226e1f02444e8d45f7aad1394afd04 100644
--- a/drivers/pci/endpoint/functions/pci-epf-test.c
+++ b/drivers/pci/endpoint/functions/pci-epf-test.c
@@ -740,6 +740,7 @@ static int pci_epf_test_set_bar(struct pci_epf *epf)
 				      &epf->bar[bar]);
 		if (ret) {
 			pci_epf_free_space(epf, epf_test->reg[bar], bar,
+					   epf_test->epc_features,
 					   PRIMARY_INTERFACE);
 			epf_test->reg[bar] = NULL;
 			dev_err(dev, "Failed to set BAR%d\n", bar);
@@ -941,6 +942,7 @@ static void pci_epf_test_free_space(struct pci_epf *epf)
 			continue;
 
 		pci_epf_free_space(epf, epf_test->reg[bar], bar,
+				   epf_test->epc_features,
 				   PRIMARY_INTERFACE);
 		epf_test->reg[bar] = NULL;
 	}
diff --git a/drivers/pci/endpoint/functions/pci-epf-vntb.c b/drivers/pci/endpoint/functions/pci-epf-vntb.c
index 874cb097b093ae645bbc4bf3c9d28ca812d7689d..8f59a5b9b7adec2c05eebae71c6a246bc5a8e88c 100644
--- a/drivers/pci/endpoint/functions/pci-epf-vntb.c
+++ b/drivers/pci/endpoint/functions/pci-epf-vntb.c
@@ -389,10 +389,15 @@ static int epf_ntb_config_sspad_bar_set(struct epf_ntb *ntb)
  */
 static void epf_ntb_config_spad_bar_free(struct epf_ntb *ntb)
 {
+	const struct pci_epc_features *epc_features;
 	enum pci_barno barno;
 
+	epc_features = pci_epc_get_features(ntb->epf->epc,
+					    ntb->epf->func_no,
+					    ntb->epf->vfunc_no);
+
 	barno = ntb->epf_ntb_bar[BAR_CONFIG];
-	pci_epf_free_space(ntb->epf, ntb->reg, barno, 0);
+	pci_epf_free_space(ntb->epf, ntb->reg, barno, epc_features, 0);
 }
 
 /**
@@ -557,7 +562,7 @@ static int epf_ntb_db_bar_init(struct epf_ntb *ntb)
 	return ret;
 
 err_alloc_peer_mem:
-	pci_epf_free_space(ntb->epf, mw_addr, barno, 0);
+	pci_epf_free_space(ntb->epf, mw_addr, barno, epc_features, 0);
 	return -1;
 }
 
@@ -570,10 +575,15 @@ static void epf_ntb_mw_bar_clear(struct epf_ntb *ntb, int num_mws);
  */
 static void epf_ntb_db_bar_clear(struct epf_ntb *ntb)
 {
+	const struct pci_epc_features *epc_features;
 	enum pci_barno barno;
 
+	epc_features = pci_epc_get_features(ntb->epf->epc,
+					    ntb->epf->func_no,
+					    ntb->epf->vfunc_no);
+
 	barno = ntb->epf_ntb_bar[BAR_DB];
-	pci_epf_free_space(ntb->epf, ntb->epf_db, barno, 0);
+	pci_epf_free_space(ntb->epf, ntb->epf_db, barno, epc_features, 0);
 	pci_epc_clear_bar(ntb->epf->epc,
 			  ntb->epf->func_no,
 			  ntb->epf->vfunc_no,
diff --git a/drivers/pci/endpoint/pci-epf-core.c b/drivers/pci/endpoint/pci-epf-core.c
index 394395c7f8decfa2010469655a4bd58a002993fd..b7deb0ee1760b23a24f49abf3baf53ea2f273476 100644
--- a/drivers/pci/endpoint/pci-epf-core.c
+++ b/drivers/pci/endpoint/pci-epf-core.c
@@ -213,11 +213,13 @@ EXPORT_SYMBOL_GPL(pci_epf_remove_vepf);
  * @epf: the EPF device from whom to free the memory
  * @addr: the virtual address of the PCI EPF register space
  * @bar: the BAR number corresponding to the register space
+ * @epc_features: the features provided by the EPC specific to this EPF
  * @type: Identifies if the allocated space is for primary EPC or secondary EPC
  *
  * Invoke to free the allocated PCI EPF register space.
  */
 void pci_epf_free_space(struct pci_epf *epf, void *addr, enum pci_barno bar,
+			const struct pci_epc_features *epc_features,
 			enum pci_epc_interface_type type)
 {
 	struct device *dev;
diff --git a/include/linux/pci-epf.h b/include/linux/pci-epf.h
index 879d19cebd4fc6d8df9d724e3a52fa7fbd61e535..d2d1c60fd5e0487b25aad51fee1b30554f630557 100644
--- a/include/linux/pci-epf.h
+++ b/include/linux/pci-epf.h
@@ -222,6 +222,7 @@ void *pci_epf_alloc_space(struct pci_epf *epf, size_t size, enum pci_barno bar,
 			  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,
+			const struct pci_epc_features *epc_features,
 			enum pci_epc_interface_type type);
 int pci_epf_bind(struct pci_epf *epf);
 void pci_epf_unbind(struct pci_epf *epf);

-- 
2.47.2