// SPDX-License-Identifier: GPL-2.0+// Copyright 2017 IBM Corp.#ifndef _MISC_OCXL_H_#define _MISC_OCXL_H_ #include <linux/pci.h> /* * Opencapi drivers all need some common facilities, like parsing the * device configuration space, adding a Process Element to the Shared * Process Area, etc... * * The ocxl module provides a kernel API, to allow other drivers to * reuse common code. A bit like a in-kernel library. */ #define OCXL_AFU_NAME_SZ (24+1) /* add 1 for NULL termination */ struct ocxl_afu_config { u8 idx; int dvsec_afu_control_pos; /* offset of AFU control DVSEC */ char name[OCXL_AFU_NAME_SZ]; u8 version_major; u8 version_minor; u8 afuc_type; u8 afum_type; u8 profile; u8 global_mmio_bar; /* global MMIO area */ u64 global_mmio_offset; u32 global_mmio_size; u8 pp_mmio_bar; /* per-process MMIO area */ u64 pp_mmio_offset; u32 pp_mmio_stride; u64 lpc_mem_offset; u64 lpc_mem_size; u64 special_purpose_mem_offset; u64 special_purpose_mem_size; u8 pasid_supported_log; u16 actag_supported;}; struct ocxl_fn_config { int dvsec_tl_pos; /* offset of the Transaction Layer DVSEC */ int dvsec_function_pos; /* offset of the Function DVSEC */ int dvsec_afu_info_pos; /* offset of the AFU information DVSEC */ s8 max_pasid_log; s8 max_afu_index;}; enum ocxl_endian { OCXL_BIG_ENDIAN = 0, /**< AFU data is big-endian */ OCXL_LITTLE_ENDIAN = 1, /**< AFU data is little-endian */ OCXL_HOST_ENDIAN = 2, /**< AFU data is the same endianness as the host */}; // These are opaque outside the ocxl driverstruct ocxl_afu;struct ocxl_fn;struct ocxl_context; // Device detection & initialisation /** * ocxl_function_open() - Open an OpenCAPI function on an OpenCAPI device * @dev: The PCI device that contains the function * * Returns an opaque pointer to the function, or an error pointer (check with IS_ERR) */struct ocxl_fn *ocxl_function_open(struct pci_dev *dev); /** * ocxl_function_afu_list() - Get the list of AFUs associated with a PCI function device * Returns a list of struct ocxl_afu * * * @fn: The OpenCAPI function containing the AFUs */struct list_head *ocxl_function_afu_list(struct ocxl_fn *fn); /** * ocxl_function_fetch_afu() - Fetch an AFU instance from an OpenCAPI function * @fn: The OpenCAPI function to get the AFU from * @afu_idx: The index of the AFU to get * * If successful, the AFU should be released with ocxl_afu_put() * * Returns a pointer to the AFU, or NULL on error */struct ocxl_afu *ocxl_function_fetch_afu(struct ocxl_fn *fn, u8 afu_idx); /** * ocxl_afu_get() - Take a reference to an AFU * @afu: The AFU to increment the reference count on */void ocxl_afu_get(struct ocxl_afu *afu); /** * ocxl_afu_put() - Release a reference to an AFU * @afu: The AFU to decrement the reference count on */void ocxl_afu_put(struct ocxl_afu *afu); /** * ocxl_function_config() - Get the configuration information for an OpenCAPI function * @fn: The OpenCAPI function to get the config for * * Returns the function config, or NULL on error */const struct ocxl_fn_config *ocxl_function_config(struct ocxl_fn *fn); /** * ocxl_function_close() - Close an OpenCAPI function * This will free any AFUs previously retrieved from the function, and * detach and associated contexts. The contexts must by freed by the caller. * * @fn: The OpenCAPI function to close * */void ocxl_function_close(struct ocxl_fn *fn); // Context allocation /** * ocxl_context_alloc() - Allocate an OpenCAPI context * @context: The OpenCAPI context to allocate, must be freed with ocxl_context_free * @afu: The AFU the context belongs to * @mapping: The mapping to unmap when the context is closed (may be NULL) */int ocxl_context_alloc(struct ocxl_context **context, struct ocxl_afu *afu, struct address_space *mapping); /** * ocxl_context_free() - Free an OpenCAPI context * @ctx: The OpenCAPI context to free */void ocxl_context_free(struct ocxl_context *ctx); /** * ocxl_context_attach() - Grant access to an MM to an OpenCAPI context * @ctx: The OpenCAPI context to attach * @amr: The value of the AMR register to restrict access * @mm: The mm to attach to the context * * Returns 0 on success, negative on failure */int ocxl_context_attach(struct ocxl_context *ctx, u64 amr, struct mm_struct *mm); /** * ocxl_context_detach() - Detach an MM from an OpenCAPI context * @ctx: The OpenCAPI context to attach * * Returns 0 on success, negative on failure */int ocxl_context_detach(struct ocxl_context *ctx); // AFU IRQs /** * ocxl_afu_irq_alloc() - Allocate an IRQ associated with an AFU context * @ctx: the AFU context * @irq_id: out, the IRQ ID * * Returns 0 on success, negative on failure */int ocxl_afu_irq_alloc(struct ocxl_context *ctx, int *irq_id); /** * ocxl_afu_irq_free() - Frees an IRQ associated with an AFU context * @ctx: the AFU context * @irq_id: the IRQ ID * * Returns 0 on success, negative on failure */int ocxl_afu_irq_free(struct ocxl_context *ctx, int irq_id); /** * ocxl_afu_irq_get_addr() - Gets the address of the trigger page for an IRQ * This can then be provided to an AFU which will write to that * page to trigger the IRQ. * @ctx: The AFU context that the IRQ is associated with * @irq_id: The IRQ ID * * returns the trigger page address, or 0 if the IRQ is not valid */u64 ocxl_afu_irq_get_addr(struct ocxl_context *ctx, int irq_id); /** * ocxl_irq_set_handler() - Provide a callback to be called when an IRQ is triggered * @ctx: The AFU context that the IRQ is associated with * @irq_id: The IRQ ID * @handler: the callback to be called when the IRQ is triggered * @free_private: the callback to be called when the IRQ is freed (may be NULL) * @private: Private data to be passed to the callbacks * * Returns 0 on success, negative on failure */int ocxl_irq_set_handler(struct ocxl_context *ctx, int irq_id, irqreturn_t (*handler)(void *private), void (*free_private)(void *private), void *private); // AFU Metadata /** * ocxl_afu_config() - Get a pointer to the config for an AFU * @afu: a pointer to the AFU to get the config for * * Returns a pointer to the AFU config */struct ocxl_afu_config *ocxl_afu_config(struct ocxl_afu *afu); /** * ocxl_afu_set_private() - Assign opaque hardware specific information to an OpenCAPI AFU. * @afu: The OpenCAPI AFU * @private: the opaque hardware specific information to assign to the driver */void ocxl_afu_set_private(struct ocxl_afu *afu, void *private); /** * ocxl_afu_get_private() - Fetch the hardware specific information associated with * an external OpenCAPI AFU. This may be consumed by an external OpenCAPI driver. * @afu: The OpenCAPI AFU * * Returns the opaque pointer associated with the device, or NULL if not set */void *ocxl_afu_get_private(struct ocxl_afu *afu); // Global MMIO/** * ocxl_global_mmio_read32() - Read a 32 bit value from global MMIO * @afu: The AFU * @offset: The Offset from the start of MMIO * @endian: the endianness that the MMIO data is in * @val: returns the value * * Returns 0 for success, negative on error */int ocxl_global_mmio_read32(struct ocxl_afu *afu, size_t offset, enum ocxl_endian endian, u32 *val); /** * ocxl_global_mmio_read64() - Read a 64 bit value from global MMIO * @afu: The AFU * @offset: The Offset from the start of MMIO * @endian: the endianness that the MMIO data is in * @val: returns the value * * Returns 0 for success, negative on error */int ocxl_global_mmio_read64(struct ocxl_afu *afu, size_t offset, enum ocxl_endian endian, u64 *val); /** * ocxl_global_mmio_write32() - Write a 32 bit value to global MMIO * @afu: The AFU * @offset: The Offset from the start of MMIO * @endian: the endianness that the MMIO data is in * @val: The value to write * * Returns 0 for success, negative on error */int ocxl_global_mmio_write32(struct ocxl_afu *afu, size_t offset, enum ocxl_endian endian, u32 val); /** * ocxl_global_mmio_write64() - Write a 64 bit value to global MMIO * @afu: The AFU * @offset: The Offset from the start of MMIO * @endian: the endianness that the MMIO data is in * @val: The value to write * * Returns 0 for success, negative on error */int ocxl_global_mmio_write64(struct ocxl_afu *afu, size_t offset, enum ocxl_endian endian, u64 val); /** * ocxl_global_mmio_set32() - Set bits in a 32 bit global MMIO register * @afu: The AFU * @offset: The Offset from the start of MMIO * @endian: the endianness that the MMIO data is in * @mask: a mask of the bits to set * * Returns 0 for success, negative on error */int ocxl_global_mmio_set32(struct ocxl_afu *afu, size_t offset, enum ocxl_endian endian, u32 mask); /** * ocxl_global_mmio_set64() - Set bits in a 64 bit global MMIO register * @afu: The AFU * @offset: The Offset from the start of MMIO * @endian: the endianness that the MMIO data is in * @mask: a mask of the bits to set * * Returns 0 for success, negative on error */int ocxl_global_mmio_set64(struct ocxl_afu *afu, size_t offset, enum ocxl_endian endian, u64 mask); /** * ocxl_global_mmio_clear32() - Set bits in a 32 bit global MMIO register * @afu: The AFU * @offset: The Offset from the start of MMIO * @endian: the endianness that the MMIO data is in * @mask: a mask of the bits to set * * Returns 0 for success, negative on error */int ocxl_global_mmio_clear32(struct ocxl_afu *afu, size_t offset, enum ocxl_endian endian, u32 mask); /** * ocxl_global_mmio_clear64() - Set bits in a 64 bit global MMIO register * @afu: The AFU * @offset: The Offset from the start of MMIO * @endian: the endianness that the MMIO data is in * @mask: a mask of the bits to set * * Returns 0 for success, negative on error */int ocxl_global_mmio_clear64(struct ocxl_afu *afu, size_t offset, enum ocxl_endian endian, u64 mask); // Functions left here are for compatibility with the cxlflash driver /* * Read the configuration space of a function for the AFU specified by * the index 'afu_idx'. Fills in a ocxl_afu_config structure */int ocxl_config_read_afu(struct pci_dev *dev, struct ocxl_fn_config *fn, struct ocxl_afu_config *afu, u8 afu_idx); /* * Tell an AFU, by writing in the configuration space, the PASIDs that * it can use. Range starts at 'pasid_base' and its size is a multiple * of 2 * * 'afu_control_offset' is the offset of the AFU control DVSEC which * can be found in the function configuration */void ocxl_config_set_afu_pasid(struct pci_dev *dev, int afu_control_offset, int pasid_base, u32 pasid_count_log); /* * Get the actag configuration for the function: * 'base' is the first actag value that can be used. * 'enabled' it the number of actags available, starting from base. * 'supported' is the total number of actags desired by all the AFUs * of the function. */int ocxl_config_get_actag_info(struct pci_dev *dev, u16 *base, u16 *enabled, u16 *supported); /* * Tell a function, by writing in the configuration space, the actags * it can use. * * 'func_offset' is the offset of the Function DVSEC that can found in * the function configuration */void ocxl_config_set_actag(struct pci_dev *dev, int func_offset, u32 actag_base, u32 actag_count); /* * Tell an AFU, by writing in the configuration space, the actags it * can use. * * 'afu_control_offset' is the offset of the AFU control DVSEC for the * desired AFU. It can be found in the AFU configuration */void ocxl_config_set_afu_actag(struct pci_dev *dev, int afu_control_offset, int actag_base, int actag_count); /* * Enable/disable an AFU, by writing in the configuration space. * * 'afu_control_offset' is the offset of the AFU control DVSEC for the * desired AFU. It can be found in the AFU configuration */void ocxl_config_set_afu_state(struct pci_dev *dev, int afu_control_offset, int enable); /* * Set the Transaction Layer configuration in the configuration space. * Only needed for function 0. * * It queries the host TL capabilities, find some common ground * between the host and device, and set the Transaction Layer on both * accordingly. */int ocxl_config_set_TL(struct pci_dev *dev, int tl_dvsec); /* * Request an AFU to terminate a PASID. * Will return once the AFU has acked the request, or an error in case * of timeout. * * The hardware can only terminate one PASID at a time, so caller must * guarantee some kind of serialization. * * 'afu_control_offset' is the offset of the AFU control DVSEC for the * desired AFU. It can be found in the AFU configuration */int ocxl_config_terminate_pasid(struct pci_dev *dev, int afu_control_offset, int pasid); /* * Read the configuration space of a function and fill in a * ocxl_fn_config structure with all the function details */int ocxl_config_read_function(struct pci_dev *dev, struct ocxl_fn_config *fn); /* * Set up the opencapi link for the function. * * When called for the first time for a link, it sets up the Shared * Process Area for the link and the interrupt handler to process * translation faults. * * Returns a 'link handle' that should be used for further calls for * the link */int ocxl_link_setup(struct pci_dev *dev, int PE_mask, void **link_handle); /* * Remove the association between the function and its link. */void ocxl_link_release(struct pci_dev *dev, void *link_handle); /* * Add a Process Element to the Shared Process Area for a link. * The process is defined by its PASID, pid, tid and its mm_struct. * * 'xsl_err_cb' is an optional callback if the driver wants to be * notified when the translation fault interrupt handler detects an * address error. * 'xsl_err_data' is an argument passed to the above callback, if * defined */int ocxl_link_add_pe(void *link_handle, int pasid, u32 pidr, u32 tidr, u64 amr, u16 bdf, struct mm_struct *mm, void (*xsl_err_cb)(void *data, u64 addr, u64 dsisr), void *xsl_err_data); /* * Remove a Process Element from the Shared Process Area for a link */int ocxl_link_remove_pe(void *link_handle, int pasid); /* * Allocate an AFU interrupt associated to the link. * * 'hw_irq' is the hardware interrupt number */int ocxl_link_irq_alloc(void *link_handle, int *hw_irq); /* * Free a previously allocated AFU interrupt */void ocxl_link_free_irq(void *link_handle, int hw_irq); #endif /* _MISC_OCXL_H_ */
// SPDX-License-Identifier: GPL-2.0+
// Copyright 2017 IBM Corp.
#ifndef _MISC_OCXL_H_
#define _MISC_OCXL_H_
#include <linux/pci.h>
/*
* Opencapi drivers all need some common facilities, like parsing the
* device configuration space, adding a Process Element to the Shared
* Process Area, etc...
*
* The ocxl module provides a kernel API, to allow other drivers to
* reuse common code. A bit like a in-kernel library.
*/
#define OCXL_AFU_NAME_SZ (24+1) /* add 1 for NULL termination */
struct ocxl_afu_config {
u8 idx;
int dvsec_afu_control_pos; /* offset of AFU control DVSEC */
char name[OCXL_AFU_NAME_SZ];
u8 version_major;
u8 version_minor;
u8 afuc_type;
u8 afum_type;
u8 profile;
u8 global_mmio_bar; /* global MMIO area */
u64 global_mmio_offset;
u32 global_mmio_size;
u8 pp_mmio_bar; /* per-process MMIO area */
u64 pp_mmio_offset;
u32 pp_mmio_stride;
u64 lpc_mem_offset;
u64 lpc_mem_size;
u64 special_purpose_mem_offset;
u64 special_purpose_mem_size;
u8 pasid_supported_log;
u16 actag_supported;
};
struct ocxl_fn_config {
int dvsec_tl_pos; /* offset of the Transaction Layer DVSEC */
int dvsec_function_pos; /* offset of the Function DVSEC */
int dvsec_afu_info_pos; /* offset of the AFU information DVSEC */
s8 max_pasid_log;
s8 max_afu_index;
};
enum ocxl_endian {
OCXL_BIG_ENDIAN = 0, /**< AFU data is big-endian */
OCXL_LITTLE_ENDIAN = 1, /**< AFU data is little-endian */
OCXL_HOST_ENDIAN = 2, /**< AFU data is the same endianness as the host */
};
// These are opaque outside the ocxl driver
struct ocxl_afu;
struct ocxl_fn;
struct ocxl_context;
// Device detection & initialisation
/**
* ocxl_function_open() - Open an OpenCAPI function on an OpenCAPI device
* @dev: The PCI device that contains the function
*
* Returns an opaque pointer to the function, or an error pointer (check with IS_ERR)
*/
struct ocxl_fn *ocxl_function_open(struct pci_dev *dev);
/**
* ocxl_function_afu_list() - Get the list of AFUs associated with a PCI function device
* Returns a list of struct ocxl_afu *
*
* @fn: The OpenCAPI function containing the AFUs
*/
struct list_head *ocxl_function_afu_list(struct ocxl_fn *fn);
/**
* ocxl_function_fetch_afu() - Fetch an AFU instance from an OpenCAPI function
* @fn: The OpenCAPI function to get the AFU from
* @afu_idx: The index of the AFU to get
*
* If successful, the AFU should be released with ocxl_afu_put()
*
* Returns a pointer to the AFU, or NULL on error
*/
struct ocxl_afu *ocxl_function_fetch_afu(struct ocxl_fn *fn, u8 afu_idx);
/**
* ocxl_afu_get() - Take a reference to an AFU
* @afu: The AFU to increment the reference count on
*/
void ocxl_afu_get(struct ocxl_afu *afu);
/**
* ocxl_afu_put() - Release a reference to an AFU
* @afu: The AFU to decrement the reference count on
*/
void ocxl_afu_put(struct ocxl_afu *afu);
/**
* ocxl_function_config() - Get the configuration information for an OpenCAPI function
* @fn: The OpenCAPI function to get the config for
*
* Returns the function config, or NULL on error
*/
const struct ocxl_fn_config *ocxl_function_config(struct ocxl_fn *fn);
/**
* ocxl_function_close() - Close an OpenCAPI function
* This will free any AFUs previously retrieved from the function, and
* detach and associated contexts. The contexts must by freed by the caller.
*
* @fn: The OpenCAPI function to close
*
*/
void ocxl_function_close(struct ocxl_fn *fn);
// Context allocation
/**
* ocxl_context_alloc() - Allocate an OpenCAPI context
* @context: The OpenCAPI context to allocate, must be freed with ocxl_context_free
* @afu: The AFU the context belongs to
* @mapping: The mapping to unmap when the context is closed (may be NULL)
*/
int ocxl_context_alloc(struct ocxl_context **context, struct ocxl_afu *afu,
struct address_space *mapping);
/**
* ocxl_context_free() - Free an OpenCAPI context
* @ctx: The OpenCAPI context to free
*/
void ocxl_context_free(struct ocxl_context *ctx);
/**
* ocxl_context_attach() - Grant access to an MM to an OpenCAPI context
* @ctx: The OpenCAPI context to attach
* @amr: The value of the AMR register to restrict access
* @mm: The mm to attach to the context
*
* Returns 0 on success, negative on failure
*/
int ocxl_context_attach(struct ocxl_context *ctx, u64 amr,
struct mm_struct *mm);
/**
* ocxl_context_detach() - Detach an MM from an OpenCAPI context
* @ctx: The OpenCAPI context to attach
*
* Returns 0 on success, negative on failure
*/
int ocxl_context_detach(struct ocxl_context *ctx);
// AFU IRQs
/**
* ocxl_afu_irq_alloc() - Allocate an IRQ associated with an AFU context
* @ctx: the AFU context
* @irq_id: out, the IRQ ID
*
* Returns 0 on success, negative on failure
*/
int ocxl_afu_irq_alloc(struct ocxl_context *ctx, int *irq_id);
/**
* ocxl_afu_irq_free() - Frees an IRQ associated with an AFU context
* @ctx: the AFU context
* @irq_id: the IRQ ID
*
* Returns 0 on success, negative on failure
*/
int ocxl_afu_irq_free(struct ocxl_context *ctx, int irq_id);
/**
* ocxl_afu_irq_get_addr() - Gets the address of the trigger page for an IRQ
* This can then be provided to an AFU which will write to that
* page to trigger the IRQ.
* @ctx: The AFU context that the IRQ is associated with
* @irq_id: The IRQ ID
*
* returns the trigger page address, or 0 if the IRQ is not valid
*/
u64 ocxl_afu_irq_get_addr(struct ocxl_context *ctx, int irq_id);
/**
* ocxl_irq_set_handler() - Provide a callback to be called when an IRQ is triggered
* @ctx: The AFU context that the IRQ is associated with
* @irq_id: The IRQ ID
* @handler: the callback to be called when the IRQ is triggered
* @free_private: the callback to be called when the IRQ is freed (may be NULL)
* @private: Private data to be passed to the callbacks
*
* Returns 0 on success, negative on failure
*/
int ocxl_irq_set_handler(struct ocxl_context *ctx, int irq_id,
irqreturn_t (*handler)(void *private),
void (*free_private)(void *private),
void *private);
// AFU Metadata
/**
* ocxl_afu_config() - Get a pointer to the config for an AFU
* @afu: a pointer to the AFU to get the config for
*
* Returns a pointer to the AFU config
*/
struct ocxl_afu_config *ocxl_afu_config(struct ocxl_afu *afu);
/**
* ocxl_afu_set_private() - Assign opaque hardware specific information to an OpenCAPI AFU.
* @afu: The OpenCAPI AFU
* @private: the opaque hardware specific information to assign to the driver
*/
void ocxl_afu_set_private(struct ocxl_afu *afu, void *private);
/**
* ocxl_afu_get_private() - Fetch the hardware specific information associated with
* an external OpenCAPI AFU. This may be consumed by an external OpenCAPI driver.
* @afu: The OpenCAPI AFU
*
* Returns the opaque pointer associated with the device, or NULL if not set
*/
void *ocxl_afu_get_private(struct ocxl_afu *afu);
// Global MMIO
/**
* ocxl_global_mmio_read32() - Read a 32 bit value from global MMIO
* @afu: The AFU
* @offset: The Offset from the start of MMIO
* @endian: the endianness that the MMIO data is in
* @val: returns the value
*
* Returns 0 for success, negative on error
*/
int ocxl_global_mmio_read32(struct ocxl_afu *afu, size_t offset,
enum ocxl_endian endian, u32 *val);
/**
* ocxl_global_mmio_read64() - Read a 64 bit value from global MMIO
* @afu: The AFU
* @offset: The Offset from the start of MMIO
* @endian: the endianness that the MMIO data is in
* @val: returns the value
*
* Returns 0 for success, negative on error
*/
int ocxl_global_mmio_read64(struct ocxl_afu *afu, size_t offset,
enum ocxl_endian endian, u64 *val);
/**
* ocxl_global_mmio_write32() - Write a 32 bit value to global MMIO
* @afu: The AFU
* @offset: The Offset from the start of MMIO
* @endian: the endianness that the MMIO data is in
* @val: The value to write
*
* Returns 0 for success, negative on error
*/
int ocxl_global_mmio_write32(struct ocxl_afu *afu, size_t offset,
enum ocxl_endian endian, u32 val);
/**
* ocxl_global_mmio_write64() - Write a 64 bit value to global MMIO
* @afu: The AFU
* @offset: The Offset from the start of MMIO
* @endian: the endianness that the MMIO data is in
* @val: The value to write
*
* Returns 0 for success, negative on error
*/
int ocxl_global_mmio_write64(struct ocxl_afu *afu, size_t offset,
enum ocxl_endian endian, u64 val);
/**
* ocxl_global_mmio_set32() - Set bits in a 32 bit global MMIO register
* @afu: The AFU
* @offset: The Offset from the start of MMIO
* @endian: the endianness that the MMIO data is in
* @mask: a mask of the bits to set
*
* Returns 0 for success, negative on error
*/
int ocxl_global_mmio_set32(struct ocxl_afu *afu, size_t offset,
enum ocxl_endian endian, u32 mask);
/**
* ocxl_global_mmio_set64() - Set bits in a 64 bit global MMIO register
* @afu: The AFU
* @offset: The Offset from the start of MMIO
* @endian: the endianness that the MMIO data is in
* @mask: a mask of the bits to set
*
* Returns 0 for success, negative on error
*/
int ocxl_global_mmio_set64(struct ocxl_afu *afu, size_t offset,
enum ocxl_endian endian, u64 mask);
/**
* ocxl_global_mmio_clear32() - Set bits in a 32 bit global MMIO register
* @afu: The AFU
* @offset: The Offset from the start of MMIO
* @endian: the endianness that the MMIO data is in
* @mask: a mask of the bits to set
*
* Returns 0 for success, negative on error
*/
int ocxl_global_mmio_clear32(struct ocxl_afu *afu, size_t offset,
enum ocxl_endian endian, u32 mask);
/**
* ocxl_global_mmio_clear64() - Set bits in a 64 bit global MMIO register
* @afu: The AFU
* @offset: The Offset from the start of MMIO
* @endian: the endianness that the MMIO data is in
* @mask: a mask of the bits to set
*
* Returns 0 for success, negative on error
*/
int ocxl_global_mmio_clear64(struct ocxl_afu *afu, size_t offset,
enum ocxl_endian endian, u64 mask);
// Functions left here are for compatibility with the cxlflash driver
/*
* Read the configuration space of a function for the AFU specified by
* the index 'afu_idx'. Fills in a ocxl_afu_config structure
*/
int ocxl_config_read_afu(struct pci_dev *dev,
struct ocxl_fn_config *fn,
struct ocxl_afu_config *afu,
u8 afu_idx);
/*
* Tell an AFU, by writing in the configuration space, the PASIDs that
* it can use. Range starts at 'pasid_base' and its size is a multiple
* of 2
*
* 'afu_control_offset' is the offset of the AFU control DVSEC which
* can be found in the function configuration
*/
void ocxl_config_set_afu_pasid(struct pci_dev *dev,
int afu_control_offset,
int pasid_base, u32 pasid_count_log);
/*
* Get the actag configuration for the function:
* 'base' is the first actag value that can be used.
* 'enabled' it the number of actags available, starting from base.
* 'supported' is the total number of actags desired by all the AFUs
* of the function.
*/
int ocxl_config_get_actag_info(struct pci_dev *dev,
u16 *base, u16 *enabled, u16 *supported);
/*
* Tell a function, by writing in the configuration space, the actags
* it can use.
*
* 'func_offset' is the offset of the Function DVSEC that can found in
* the function configuration
*/
void ocxl_config_set_actag(struct pci_dev *dev, int func_offset,
u32 actag_base, u32 actag_count);
/*
* Tell an AFU, by writing in the configuration space, the actags it
* can use.
*
* 'afu_control_offset' is the offset of the AFU control DVSEC for the
* desired AFU. It can be found in the AFU configuration
*/
void ocxl_config_set_afu_actag(struct pci_dev *dev,
int afu_control_offset,
int actag_base, int actag_count);
/*
* Enable/disable an AFU, by writing in the configuration space.
*
* 'afu_control_offset' is the offset of the AFU control DVSEC for the
* desired AFU. It can be found in the AFU configuration
*/
void ocxl_config_set_afu_state(struct pci_dev *dev,
int afu_control_offset, int enable);
/*
* Set the Transaction Layer configuration in the configuration space.
* Only needed for function 0.
*
* It queries the host TL capabilities, find some common ground
* between the host and device, and set the Transaction Layer on both
* accordingly.
*/
int ocxl_config_set_TL(struct pci_dev *dev, int tl_dvsec);
/*
* Request an AFU to terminate a PASID.
* Will return once the AFU has acked the request, or an error in case
* of timeout.
*
* The hardware can only terminate one PASID at a time, so caller must
* guarantee some kind of serialization.
*
* 'afu_control_offset' is the offset of the AFU control DVSEC for the
* desired AFU. It can be found in the AFU configuration
*/
int ocxl_config_terminate_pasid(struct pci_dev *dev,
int afu_control_offset, int pasid);
/*
* Read the configuration space of a function and fill in a
* ocxl_fn_config structure with all the function details
*/
int ocxl_config_read_function(struct pci_dev *dev,
struct ocxl_fn_config *fn);
/*
* Set up the opencapi link for the function.
*
* When called for the first time for a link, it sets up the Shared
* Process Area for the link and the interrupt handler to process
* translation faults.
*
* Returns a 'link handle' that should be used for further calls for
* the link
*/
int ocxl_link_setup(struct pci_dev *dev, int PE_mask,
void **link_handle);
/*
* Remove the association between the function and its link.
*/
void ocxl_link_release(struct pci_dev *dev, void *link_handle);
/*
* Add a Process Element to the Shared Process Area for a link.
* The process is defined by its PASID, pid, tid and its mm_struct.
*
* 'xsl_err_cb' is an optional callback if the driver wants to be
* notified when the translation fault interrupt handler detects an
* address error.
* 'xsl_err_data' is an argument passed to the above callback, if
* defined
*/
int ocxl_link_add_pe(void *link_handle, int pasid, u32 pidr, u32 tidr,
u64 amr, u16 bdf, struct mm_struct *mm,
void (*xsl_err_cb)(void *data, u64 addr, u64 dsisr),
void *xsl_err_data);
/*
* Remove a Process Element from the Shared Process Area for a link
*/
int ocxl_link_remove_pe(void *link_handle, int pasid);
/*
* Allocate an AFU interrupt associated to the link.
*
* 'hw_irq' is the hardware interrupt number
*/
int ocxl_link_irq_alloc(void *link_handle, int *hw_irq);
/*
* Free a previously allocated AFU interrupt
*/
void ocxl_link_free_irq(void *link_handle, int hw_irq);
#endif /* _MISC_OCXL_H_ */