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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/misc/ocxl/ocxl_internal.h
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/misc/ocxl/ocxl_internal.h')
-rw-r--r--drivers/misc/ocxl/ocxl_internal.h154
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_ */