struct msu_buffer { constchar *name; /* * ->assign() called when buffer 'mode' is set to this driver * (aka mode_store()) * @device: struct device * of the msc * @mode: allows the driver to set HW mode (see the enum above) * Returns: a pointer to a private structure associated with this * msc or NULL in case of error. This private structure * will then be passed into all other callbacks.
*/ void *(*assign)(struct device *dev, int *mode); /* ->unassign(): some other mode is selected, clean up */ void (*unassign)(void *priv); /* * ->alloc_window(): allocate memory for the window of a given * size * @sgt: pointer to sg_table, can be overridden by the buffer * driver, or kept intact * Returns: number of sg table entries <= number of pages; * 0 is treated as an allocation failure.
*/ int (*alloc_window)(void *priv, struct sg_table **sgt,
size_t size); void (*free_window)(void *priv, struct sg_table *sgt); /* ->activate(): trace has started */ void (*activate)(void *priv); /* ->deactivate(): trace is about to stop */ void (*deactivate)(void *priv); /* * ->ready(): window @sgt is filled up to the last block OR * tracing is stopped by the user; this window contains * @bytes data. The window in question transitions into * the "LOCKED" state, indicating that it can't be used * by hardware. To clear this state and make the window * available to the hardware again, call * intel_th_msc_window_unlock().
*/ int (*ready)(void *priv, struct sg_table *sgt, size_t bytes);
};
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