mei: pxp: add command streamer API to the PXP driver
The discrete graphics card with GSC firmware using command streamer API hence it requires to enhance pxp module with the new gsc_command() handler. The handler is implemented via mei_pxp_gsc_command() which is just a thin wrapper around mei_cldev_send_gsc_command() Signed-off-by: Vitaly Lubart <vitaly.lubart@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Alan Previn <alan.previn.teres.alexis@intel.com> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Link: https://patchwork.freedesktop.org/patch/msgid/20220928004145.745803-6-daniele.ceraolospurio@intel.com
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@ -77,10 +77,35 @@ mei_pxp_receive_message(struct device *dev, void *buffer, size_t size)
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return byte;
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return byte;
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}
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}
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/**
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* mei_pxp_gsc_command() - sends a gsc command, by sending
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* a sgl mei message to gsc and receiving reply from gsc
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*
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* @dev: device corresponding to the mei_cl_device
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* @client_id: client id to send the command to
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* @fence_id: fence id to send the command to
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* @sg_in: scatter gather list containing addresses for rx message buffer
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* @total_in_len: total length of data in 'in' sg, can be less than the sum of buffers sizes
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* @sg_out: scatter gather list containing addresses for tx message buffer
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*
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* Return: bytes sent on Success, <0 on Failure
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*/
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static ssize_t mei_pxp_gsc_command(struct device *dev, u8 client_id, u32 fence_id,
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struct scatterlist *sg_in, size_t total_in_len,
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struct scatterlist *sg_out)
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{
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struct mei_cl_device *cldev;
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cldev = to_mei_cl_device(dev);
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return mei_cldev_send_gsc_command(cldev, client_id, fence_id, sg_in, total_in_len, sg_out);
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}
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static const struct i915_pxp_component_ops mei_pxp_ops = {
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static const struct i915_pxp_component_ops mei_pxp_ops = {
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.owner = THIS_MODULE,
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.owner = THIS_MODULE,
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.send = mei_pxp_send_message,
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.send = mei_pxp_send_message,
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.recv = mei_pxp_receive_message,
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.recv = mei_pxp_receive_message,
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.gsc_command = mei_pxp_gsc_command,
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};
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};
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static int mei_component_master_bind(struct device *dev)
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static int mei_component_master_bind(struct device *dev)
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@ -8,6 +8,7 @@
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#include <linux/mutex.h>
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#include <linux/mutex.h>
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#include <linux/device.h>
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#include <linux/device.h>
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struct scatterlist;
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/**
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/**
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* struct i915_pxp_component_ops - ops for PXP services.
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* struct i915_pxp_component_ops - ops for PXP services.
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@ -23,6 +24,10 @@ struct i915_pxp_component_ops {
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int (*send)(struct device *dev, const void *message, size_t size);
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int (*send)(struct device *dev, const void *message, size_t size);
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int (*recv)(struct device *dev, void *buffer, size_t size);
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int (*recv)(struct device *dev, void *buffer, size_t size);
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ssize_t (*gsc_command)(struct device *dev, u8 client_id, u32 fence_id,
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struct scatterlist *sg_in, size_t total_in_len,
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struct scatterlist *sg_out);
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};
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};
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/**
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/**
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