soc: qcom: Add Shared Memory Driver
This adds the Qualcomm Shared Memory Driver (SMD) providing communication channels to remote processors, ontop of SMEM. Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com> Signed-off-by: Andy Gross <agross@codeaurora.org>
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@ -19,6 +19,14 @@ config QCOM_PM
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modes. It interface with various system drivers to put the cores in
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low power modes.
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config QCOM_SMD
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tristate "Qualcomm Shared Memory Driver (SMD)"
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depends on QCOM_SMEM
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help
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Say y here to enable support for the Qualcomm Shared Memory Driver
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providing communication channels to remote processors in Qualcomm
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platforms.
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config QCOM_SMEM
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tristate "Qualcomm Shared Memory Manager (SMEM)"
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depends on ARCH_QCOM
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@ -1,3 +1,4 @@
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obj-$(CONFIG_QCOM_GSBI) += qcom_gsbi.o
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obj-$(CONFIG_QCOM_PM) += spm.o
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obj-$(CONFIG_QCOM_SMD) += smd.o
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obj-$(CONFIG_QCOM_SMEM) += smem.o
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1319
drivers/soc/qcom/smd.c
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1319
drivers/soc/qcom/smd.c
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File diff suppressed because it is too large
Load diff
46
include/linux/soc/qcom/smd.h
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46
include/linux/soc/qcom/smd.h
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#ifndef __QCOM_SMD_H__
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#define __QCOM_SMD_H__
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#include <linux/device.h>
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#include <linux/mod_devicetable.h>
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struct qcom_smd;
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struct qcom_smd_channel;
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struct qcom_smd_lookup;
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/**
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* struct qcom_smd_device - smd device struct
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* @dev: the device struct
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* @channel: handle to the smd channel for this device
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*/
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struct qcom_smd_device {
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struct device dev;
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struct qcom_smd_channel *channel;
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};
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/**
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* struct qcom_smd_driver - smd driver struct
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* @driver: underlying device driver
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* @probe: invoked when the smd channel is found
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* @remove: invoked when the smd channel is closed
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* @callback: invoked when an inbound message is received on the channel,
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* should return 0 on success or -EBUSY if the data cannot be
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* consumed at this time
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*/
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struct qcom_smd_driver {
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struct device_driver driver;
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int (*probe)(struct qcom_smd_device *dev);
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void (*remove)(struct qcom_smd_device *dev);
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int (*callback)(struct qcom_smd_device *, const void *, size_t);
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};
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int qcom_smd_driver_register(struct qcom_smd_driver *drv);
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void qcom_smd_driver_unregister(struct qcom_smd_driver *drv);
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#define module_qcom_smd_driver(__smd_driver) \
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module_driver(__smd_driver, qcom_smd_driver_register, \
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qcom_smd_driver_unregister)
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int qcom_smd_send(struct qcom_smd_channel *channel, const void *data, int len);
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#endif
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