Commit a85ee2aa authored by Andrey Shvetsov's avatar Andrey Shvetsov Committed by Greg Kroah-Hartman
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staging: most: hdm-dim2: round up DBR memory for async/ctrl 



As the DBR memory is allocated in units of DBR_BLOCK_SIZE, it is more
efficient to configure the DIM2 IP to use whole blocks of the DBR memory.
This patch ceils the DBR memory size used by the DIM2 IP for async/ctrl
channels.

Signed-off-by: default avatarAndrey Shvetsov <andrey.shvetsov@k2l.de>
Signed-off-by: default avatarChristian Gromm <christian.gromm@microchip.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 6631c5c9

drivers/staging/most/hdm-dim2/dim2_hal.c

+3 −1
Original line number Diff line number Diff line
@@ -49,6 +49,8 @@ 
#define DBR_SIZE  (16 * 1024) /* specified by IP */

#define DBR_BLOCK_SIZE  (DBR_SIZE / 32 / DBR_MAP_SIZE)



#define ROUND_UP_TO(x, d)  (((x) + (d) - 1) / (d) * (d))



/* -------------------------------------------------------------------------- */

/* generic helper functions and macros */
@@ -698,7 +700,7 @@ static u8 init_ctrl_async(struct dim_channel *ch, u8 type, u8 is_tx, 
	if (!check_channel_address(ch_address))

		return DIM_INIT_ERR_CHANNEL_ADDRESS;



	ch->dbr_size = hw_buffer_size;

	ch->dbr_size = ROUND_UP_TO(hw_buffer_size, DBR_BLOCK_SIZE);

	ch->dbr_addr = alloc_dbr(ch->dbr_size);

	if (ch->dbr_addr >= DBR_SIZE)

		return DIM_INIT_ERR_OUT_OF_MEMORY;