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The current SCU IPC API has been operating on a single instance and there has been no way to pin the providing module in place when the SCU IPC is in use. This implements a new API that takes the SCU IPC instance as first parameter (NULL means the single instance is being used). The SCU IPC instance can be retrieved by calling new function intel_scu_ipc_dev_get() that take care of pinning the providing module in place as long as intel_scu_ipc_dev_put() is not called. The old API is updated to call the new API and is is left there in the legacy API header to support the existing users that cannot be converted easily. Subsequent patches will convert most of the users over to the new API. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_X86_INTEL_SCU_IPC_H_
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#define _ASM_X86_INTEL_SCU_IPC_H_
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#include <linux/ioport.h>
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struct device;
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struct intel_scu_ipc_dev;
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/**
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* struct intel_scu_ipc_data - Data used to configure SCU IPC
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* @mem: Base address of SCU IPC MMIO registers
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* @irq: The IRQ number used for SCU (optional)
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*/
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struct intel_scu_ipc_data {
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struct resource mem;
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int irq;
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};
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struct intel_scu_ipc_dev *
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__intel_scu_ipc_register(struct device *parent,
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const struct intel_scu_ipc_data *scu_data,
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struct module *owner);
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#define intel_scu_ipc_register(parent, scu_data) \
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__intel_scu_ipc_register(parent, scu_data, THIS_MODULE)
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struct intel_scu_ipc_dev *intel_scu_ipc_dev_get(void);
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void intel_scu_ipc_dev_put(struct intel_scu_ipc_dev *scu);
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struct intel_scu_ipc_dev *devm_intel_scu_ipc_dev_get(struct device *dev);
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int intel_scu_ipc_dev_ioread8(struct intel_scu_ipc_dev *scu, u16 addr,
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u8 *data);
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int intel_scu_ipc_dev_iowrite8(struct intel_scu_ipc_dev *scu, u16 addr,
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u8 data);
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int intel_scu_ipc_dev_readv(struct intel_scu_ipc_dev *scu, u16 *addr,
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u8 *data, size_t len);
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int intel_scu_ipc_dev_writev(struct intel_scu_ipc_dev *scu, u16 *addr,
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u8 *data, size_t len);
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int intel_scu_ipc_dev_update(struct intel_scu_ipc_dev *scu, u16 addr,
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u8 data, u8 mask);
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int intel_scu_ipc_dev_simple_command(struct intel_scu_ipc_dev *scu, int cmd,
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int sub);
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int intel_scu_ipc_dev_command_with_size(struct intel_scu_ipc_dev *scu, int cmd,
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int sub, const void *in, size_t inlen,
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size_t size, void *out, size_t outlen);
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static inline int intel_scu_ipc_dev_command(struct intel_scu_ipc_dev *scu, int cmd,
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int sub, const void *in, size_t inlen,
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void *out, size_t outlen)
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{
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return intel_scu_ipc_dev_command_with_size(scu, cmd, sub, in, inlen,
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inlen, out, outlen);
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}
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#include <asm/intel_scu_ipc_legacy.h>
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#endif
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