Merge branch 'remotes/lorenzo/pci/endpoint'

  - Use memcpy_fromio()/memcpy_toio() instead of plain memcpy() in PCI
    endpoint framework (Wen Yang)

  - Add interface to discover supported endpoint features to replace a
    bitfield that wasn't flexible enough (Kishon Vijay Abraham I)

  - Implement the new supported-feature interface for designware-plat,
    dra7xx, rockchip, cadence (Kishon Vijay Abraham I)

  - Fix issues with 64-bit BAR in endpoints (Kishon Vijay Abraham I)

  - Add layerscape endpoint mode support (Xiaowei Bao)

* remotes/lorenzo/pci/endpoint:
  misc: pci_endpoint_test: Add the layerscape EP device support
  PCI: layerscape: Add EP mode support
  arm64: dts: Add the PCIE EP node in dts
  dt-bindings: add DT binding for the layerscape PCIe controller with EP mode
  PCI: endpoint: Remove features member in struct pci_epc
  PCI: designware-plat: Remove setting epc->features in Designware plat EP driver
  PCI: rockchip: Remove pci_epf_linkup() from Rockchip EP driver
  PCI: cadence: Remove pci_epf_linkup() from Cadence EP driver
  PCI: pci-epf-test: Use pci_epc_get_features() to get EPC features
  PCI: pci-epf-test: Do not allocate next BARs memory if current BAR is 64Bit
  PCI: pci-epf-test: Remove setting epf_bar flags in function driver
  PCI: endpoint: Fix pci_epf_alloc_space() to set correct MEM TYPE flags
  PCI: endpoint: Add helper to get first unreserved BAR
  PCI: cadence: Populate ->get_features() cdns_pcie_epc_ops
  PCI: rockchip: Populate ->get_features() dw_pcie_ep_ops
  PCI: pci-dra7xx: Populate ->get_features() dw_pcie_ep_ops
  PCI: designware-plat: Populate ->get_features() dw_pcie_ep_ops
  PCI: dwc: Add ->get_features() callback function to dw_pcie_ep_ops
  PCI: endpoint: Add new pci_epc_ops to get EPC features
  PCI: endpoint: functions: Use memcpy_fromio()/memcpy_toio()

1 files changed, 23 insertions, 8 deletions

diff --git a/include/linux/pci-epc.h b/include/linux/pci-epc.h
index 37dab8116901..c3ffa3917f88 100644
--- a/include/linux/pci-epc.h
+++ b/include/linux/pci-epc.h
@@ -59,6 +59,8 @@ struct pci_epc_ops {
 			     enum pci_epc_irq_type type, u16 interrupt_num);
 	int	(*start)(struct pci_epc *epc);
 	void	(*stop)(struct pci_epc *epc);
+	const struct pci_epc_features* (*get_features)(struct pci_epc *epc,
+						       u8 func_no);
 	struct module *owner;
 };
 
@@ -97,16 +99,25 @@ struct pci_epc {
 	struct config_group		*group;
 	/* spinlock to protect against concurrent access of EP controller */
 	spinlock_t			lock;
-	unsigned int			features;
 };
 
-#define EPC_FEATURE_NO_LINKUP_NOTIFIER		BIT(0)
-#define EPC_FEATURE_BAR_MASK			(BIT(1) | BIT(2) | BIT(3))
-#define EPC_FEATURE_MSIX_AVAILABLE		BIT(4)
-#define EPC_FEATURE_SET_BAR(features, bar)	\
-		(features |= (EPC_FEATURE_BAR_MASK & (bar << 1)))
-#define EPC_FEATURE_GET_BAR(features)		\
-		((features & EPC_FEATURE_BAR_MASK) >> 1)
+/**
+ * struct pci_epc_features - features supported by a EPC device per function
+ * @linkup_notifier: indicate if the EPC device can notify EPF driver on link up
+ * @msi_capable: indicate if the endpoint function has MSI capability
+ * @msix_capable: indicate if the endpoint function has MSI-X capability
+ * @reserved_bar: bitmap to indicate reserved BAR unavailable to function driver
+ * @bar_fixed_64bit: bitmap to indicate fixed 64bit BARs
+ * @bar_fixed_size: Array specifying the size supported by each BAR
+ */
+struct pci_epc_features {
+	unsigned int	linkup_notifier : 1;
+	unsigned int	msi_capable : 1;
+	unsigned int	msix_capable : 1;
+	u8	reserved_bar;
+	u8	bar_fixed_64bit;
+	u64	bar_fixed_size[BAR_5 + 1];
+};
 
 #define to_pci_epc(device) container_of((device), struct pci_epc, dev)
 
@@ -158,6 +169,10 @@ int pci_epc_raise_irq(struct pci_epc *epc, u8 func_no,
 		      enum pci_epc_irq_type type, u16 interrupt_num);
 int pci_epc_start(struct pci_epc *epc);
 void pci_epc_stop(struct pci_epc *epc);
+const struct pci_epc_features *pci_epc_get_features(struct pci_epc *epc,
+						    u8 func_no);
+unsigned int pci_epc_get_first_free_bar(const struct pci_epc_features
+					*epc_features);
 struct pci_epc *pci_epc_get(const char *epc_name);
 void pci_epc_put(struct pci_epc *epc);