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412576293c
The mailbox payload pointer is void __iomem *. Casting it to u32 * is
incorrect and causes sparse warning.
cast removes address space '__iomem' of expression
Fixes: b87f920b93 ("accel/amdxdna: Support hardware mailbox")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202501130921.ktqwsMLH-lkp@intel.com/
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250113182617.1256094-1-lizhi.hou@amd.com
124 lines
3.5 KiB
C
124 lines
3.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2022-2024, Advanced Micro Devices, Inc.
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*/
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#ifndef _AIE2_MAILBOX_H_
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#define _AIE2_MAILBOX_H_
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struct mailbox;
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struct mailbox_channel;
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/*
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* xdna_mailbox_msg - message struct
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*
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* @opcode: opcode for firmware
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* @handle: handle used for the notify callback
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* @notify_cb: callback function to notify the sender when there is response
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* @send_data: pointing to sending data
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* @send_size: size of the sending data
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*
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* The mailbox will split the sending data in to multiple firmware message if
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* the size of the data is too big. This is transparent to the sender. The
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* sender will receive one notification.
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*/
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struct xdna_mailbox_msg {
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u32 opcode;
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void *handle;
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int (*notify_cb)(void *handle, void __iomem *data, size_t size);
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u8 *send_data;
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size_t send_size;
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};
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/*
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* xdna_mailbox_res - mailbox hardware resource
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*
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* @ringbuf_base: ring buffer base address
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* @ringbuf_size: ring buffer size
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* @mbox_base: mailbox base address
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* @mbox_size: mailbox size
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*/
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struct xdna_mailbox_res {
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void __iomem *ringbuf_base;
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size_t ringbuf_size;
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void __iomem *mbox_base;
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size_t mbox_size;
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const char *name;
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};
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/*
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* xdna_mailbox_chann_res - resources
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*
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* @rb_start_addr: ring buffer start address
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* @rb_size: ring buffer size
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* @mb_head_ptr_reg: mailbox head pointer register
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* @mb_tail_ptr_reg: mailbox tail pointer register
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*/
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struct xdna_mailbox_chann_res {
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u32 rb_start_addr;
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u32 rb_size;
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u32 mb_head_ptr_reg;
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u32 mb_tail_ptr_reg;
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};
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/*
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* xdna_mailbox_create() -- create mailbox subsystem and initialize
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*
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* @ddev: device pointer
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* @res: SRAM and mailbox resources
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*
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* Return: If success, return a handle of mailbox subsystem.
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* Otherwise, return NULL pointer.
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*/
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struct mailbox *xdnam_mailbox_create(struct drm_device *ddev,
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const struct xdna_mailbox_res *res);
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/*
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* xdna_mailbox_create_channel() -- Create a mailbox channel instance
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*
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* @mailbox: the handle return from xdna_mailbox_create()
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* @x2i: host to firmware mailbox resources
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* @i2x: firmware to host mailbox resources
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* @xdna_mailbox_intr_reg: register addr of MSI-X interrupt
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* @mb_irq: Linux IRQ number associated with mailbox MSI-X interrupt vector index
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*
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* Return: If success, return a handle of mailbox channel. Otherwise, return NULL.
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*/
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struct mailbox_channel *
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xdna_mailbox_create_channel(struct mailbox *mailbox,
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const struct xdna_mailbox_chann_res *x2i,
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const struct xdna_mailbox_chann_res *i2x,
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u32 xdna_mailbox_intr_reg,
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int mb_irq);
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/*
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* xdna_mailbox_destroy_channel() -- destroy mailbox channel
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*
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* @mailbox_chann: the handle return from xdna_mailbox_create_channel()
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*
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* Return: if success, return 0. otherwise return error code
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*/
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int xdna_mailbox_destroy_channel(struct mailbox_channel *mailbox_chann);
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/*
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* xdna_mailbox_stop_channel() -- stop mailbox channel
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*
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* @mailbox_chann: the handle return from xdna_mailbox_create_channel()
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*
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* Return: if success, return 0. otherwise return error code
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*/
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void xdna_mailbox_stop_channel(struct mailbox_channel *mailbox_chann);
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/*
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* xdna_mailbox_send_msg() -- Send a message
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*
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* @mailbox_chann: Mailbox channel handle
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* @msg: message struct for message information
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* @tx_timeout: the timeout value for sending the message in ms.
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*
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* Return: If success return 0, otherwise, return error code
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*/
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int xdna_mailbox_send_msg(struct mailbox_channel *mailbox_chann,
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const struct xdna_mailbox_msg *msg, u64 tx_timeout);
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#endif /* _AIE2_MAILBOX_ */
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