ocxl: Add a kernel API for other opencapi drivers

Some of the functions done by the generic driver should also be needed
by other opencapi drivers: attaching a context to an adapter,
translation fault handling, AFU interrupt allocation...

So to avoid code duplication, the driver provides a kernel API that
other drivers can use, similar to calling a in-kernel library.

It is still a bit theoretical, for lack of real hardware, and will
likely need adjustements down the road. But we used the cxlflash
driver as a guinea pig.

Signed-off-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

drivers/misc/ocxl/ocxl_internal.h

@@ -6,8 +6,8 @@
 #include <linux/pci.h>
 #include <linux/cdev.h>
 #include <linux/list.h>
+#include <misc/ocxl.h>
 
-#define OCXL_AFU_NAME_SZ      (24+1)  /* add 1 for NULL termination */
 #define MAX_IRQ_PER_LINK	2000
 #define MAX_IRQ_PER_CONTEXT	MAX_IRQ_PER_LINK
 
@@ -16,38 +16,6 @@
 
 extern struct pci_driver ocxl_pci_driver;
 
-/*
- * The following 2 structures are a fairly generic way of representing
- * the configuration data for a function and AFU, as read from the
- * configuration space.
- */
-struct ocxl_afu_config {
-	u8 idx;
-	int dvsec_afu_control_pos;
-	char name[OCXL_AFU_NAME_SZ];
-	u8 version_major;
-	u8 version_minor;
-	u8 afuc_type;
-	u8 afum_type;
-	u8 profile;
-	u8 global_mmio_bar;
-	u64 global_mmio_offset;
-	u32 global_mmio_size;
-	u8 pp_mmio_bar;
-	u64 pp_mmio_offset;
-	u32 pp_mmio_stride;
-	u8 log_mem_size;
-	u8 pasid_supported_log;
-	u16 actag_supported;
-};
-
-struct ocxl_fn_config {
-	int dvsec_tl_pos;
-	int dvsec_function_pos;
-	int dvsec_afu_info_pos;
-	s8 max_pasid_log;
-	s8 max_afu_index;
-};
 
 struct ocxl_fn {
 	struct device dev;
@@ -135,43 +103,6 @@ extern void ocxl_unregister_afu(struct ocxl_afu *afu);
 extern int ocxl_file_init(void);
 extern void ocxl_file_exit(void);
 
-extern int ocxl_config_read_function(struct pci_dev *dev,
-				struct ocxl_fn_config *fn);
-
-extern int ocxl_config_check_afu_index(struct pci_dev *dev,
-				struct ocxl_fn_config *fn, int afu_idx);
-extern int ocxl_config_read_afu(struct pci_dev *dev,
-				struct ocxl_fn_config *fn,
-				struct ocxl_afu_config *afu,
-				u8 afu_idx);
-extern int ocxl_config_get_pasid_info(struct pci_dev *dev, int *count);
-extern void ocxl_config_set_afu_pasid(struct pci_dev *dev,
-				int afu_control,
-				int pasid_base, u32 pasid_count_log);
-extern int ocxl_config_get_actag_info(struct pci_dev *dev,
-				u16 *base, u16 *enabled, u16 *supported);
-extern void ocxl_config_set_actag(struct pci_dev *dev, int func_dvsec,
-				u32 tag_first, u32 tag_count);
-extern void ocxl_config_set_afu_actag(struct pci_dev *dev, int afu_control,
-				int actag_base, int actag_count);
-extern void ocxl_config_set_afu_state(struct pci_dev *dev, int afu_control,
-				int enable);
-extern int ocxl_config_set_TL(struct pci_dev *dev, int tl_dvsec);
-extern int ocxl_config_terminate_pasid(struct pci_dev *dev, int afu_control,
-				int pasid);
-
-extern int ocxl_link_setup(struct pci_dev *dev, int PE_mask,
-			void **link_handle);
-extern void ocxl_link_release(struct pci_dev *dev, void *link_handle);
-extern int ocxl_link_add_pe(void *link_handle, int pasid, u32 pidr, u32 tidr,
-		u64 amr, struct mm_struct *mm,
-		void (*xsl_err_cb)(void *data, u64 addr, u64 dsisr),
-		void *xsl_err_data);
-extern int ocxl_link_remove_pe(void *link_handle, int pasid);
-extern int ocxl_link_irq_alloc(void *link_handle, int *hw_irq,
-			u64 *addr);
-extern void ocxl_link_free_irq(void *link_handle, int hw_irq);
-
 extern int ocxl_pasid_afu_alloc(struct ocxl_fn *fn, u32 size);
 extern void ocxl_pasid_afu_free(struct ocxl_fn *fn, u32 start, u32 size);
 extern int ocxl_actag_afu_alloc(struct ocxl_fn *fn, u32 size);