Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 154 insertions, 0 deletions

diff --git a/drivers/misc/ocxl/ocxl_internal.h b/drivers/misc/ocxl/ocxl_internal.h
new file mode 100644
index 0000000000..10125a22d5
--- /dev/null
+++ b/drivers/misc/ocxl/ocxl_internal.h
@@ -0,0 +1,154 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+// Copyright 2017 IBM Corp.
+#ifndef _OCXL_INTERNAL_H_
+#define _OCXL_INTERNAL_H_
+
+#include <linux/pci.h>
+#include <linux/cdev.h>
+#include <linux/list.h>
+#include <misc/ocxl.h>
+
+#define MAX_IRQ_PER_LINK	2000
+#define MAX_IRQ_PER_CONTEXT	MAX_IRQ_PER_LINK
+
+extern struct pci_driver ocxl_pci_driver;
+
+struct ocxl_fn {
+	struct device dev;
+	int bar_used[3];
+	struct ocxl_fn_config config;
+	struct list_head afu_list;
+	int pasid_base;
+	int actag_base;
+	int actag_enabled;
+	int actag_supported;
+	struct list_head pasid_list;
+	struct list_head actag_list;
+	void *link;
+};
+
+struct ocxl_file_info {
+	struct ocxl_afu *afu;
+	struct device dev;
+	struct cdev cdev;
+	struct bin_attribute attr_global_mmio;
+};
+
+struct ocxl_afu {
+	struct kref kref;
+	struct ocxl_fn *fn;
+	struct list_head list;
+	struct ocxl_afu_config config;
+	int pasid_base;
+	int pasid_count; /* opened contexts */
+	int pasid_max; /* maximum number of contexts */
+	int actag_base;
+	int actag_enabled;
+	struct mutex contexts_lock;
+	struct idr contexts_idr;
+	struct mutex afu_control_lock;
+	u64 global_mmio_start;
+	u64 irq_base_offset;
+	void __iomem *global_mmio_ptr;
+	u64 pp_mmio_start;
+	void *private;
+};
+
+enum ocxl_context_status {
+	CLOSED,
+	OPENED,
+	ATTACHED,
+};
+
+// Contains metadata about a translation fault
+struct ocxl_xsl_error {
+	u64 addr; // The address that triggered the fault
+	u64 dsisr; // the value of the dsisr register
+	u64 count; // The number of times this fault has been triggered
+};
+
+struct ocxl_context {
+	struct ocxl_afu *afu;
+	int pasid;
+	struct mutex status_mutex;
+	enum ocxl_context_status status;
+	struct address_space *mapping;
+	struct mutex mapping_lock;
+	wait_queue_head_t events_wq;
+	struct mutex xsl_error_lock;
+	struct ocxl_xsl_error xsl_error;
+	struct mutex irq_lock;
+	struct idr irq_idr;
+	u16 tidr; // Thread ID used for P9 wait implementation
+};
+
+struct ocxl_process_element {
+	__be64 config_state;
+	__be32 pasid;
+	__be16 bdf;
+	__be16 reserved1;
+	__be32 reserved2[9];
+	__be32 lpid;
+	__be32 tid;
+	__be32 pid;
+	__be32 reserved3[10];
+	__be64 amr;
+	__be32 reserved4[3];
+	__be32 software_state;
+};
+
+int ocxl_create_cdev(struct ocxl_afu *afu);
+void ocxl_destroy_cdev(struct ocxl_afu *afu);
+int ocxl_file_register_afu(struct ocxl_afu *afu);
+void ocxl_file_unregister_afu(struct ocxl_afu *afu);
+
+int ocxl_file_init(void);
+void ocxl_file_exit(void);
+
+int ocxl_pasid_afu_alloc(struct ocxl_fn *fn, u32 size);
+void ocxl_pasid_afu_free(struct ocxl_fn *fn, u32 start, u32 size);
+int ocxl_actag_afu_alloc(struct ocxl_fn *fn, u32 size);
+void ocxl_actag_afu_free(struct ocxl_fn *fn, u32 start, u32 size);
+
+/*
+ * Get the max PASID value that can be used by the function
+ */
+int ocxl_config_get_pasid_info(struct pci_dev *dev, int *count);
+
+/*
+ * Control whether the FPGA is reloaded on a link reset
+ */
+int ocxl_config_get_reset_reload(struct pci_dev *dev, int *val);
+int ocxl_config_set_reset_reload(struct pci_dev *dev, int val);
+
+/*
+ * Check if an AFU index is valid for the given function.
+ *
+ * AFU indexes can be sparse, so a driver should check all indexes up
+ * to the maximum found in the function description
+ */
+int ocxl_config_check_afu_index(struct pci_dev *dev,
+				struct ocxl_fn_config *fn, int afu_idx);
+
+/**
+ * ocxl_link_update_pe() - Update values within a Process Element
+ * @link_handle: the link handle associated with the process element
+ * @pasid: the PASID for the AFU context
+ * @tid: the new thread id for the process element
+ *
+ * Returns 0 on success
+ */
+int ocxl_link_update_pe(void *link_handle, int pasid, __u16 tid);
+
+int ocxl_context_mmap(struct ocxl_context *ctx,
+			struct vm_area_struct *vma);
+void ocxl_context_detach_all(struct ocxl_afu *afu);
+
+int ocxl_sysfs_register_afu(struct ocxl_file_info *info);
+void ocxl_sysfs_unregister_afu(struct ocxl_file_info *info);
+
+int ocxl_irq_offset_to_id(struct ocxl_context *ctx, u64 offset);
+u64 ocxl_irq_id_to_offset(struct ocxl_context *ctx, int irq_id);
+void ocxl_afu_irq_free_all(struct ocxl_context *ctx);
+
+#endif /* _OCXL_INTERNAL_H_ */