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amd-xgbe: Reported fifo size from hardware is not correct 

The fifo size reported by the hardware is not correct. Add support
to limit the reported size to what is actually present.  Also, fix
the argument types used in the fifo size calculation function.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Lendacky, Thomas 2014-08-29 13:16:56 -05:00 committed by David S. Miller
parent a9a4a2d9d6
commit f076f45372
2 changed files with 7 additions and 2 deletions
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8
drivers/net/ethernet/amd/xgbe/xgbe-dev.c
View File

@ -1706,8 +1706,8 @@ static void xgbe_config_mtl_mode(struct xgbe_prv_data *pdata)
XGMAC_IOWRITE_BITS(pdata, MTL_OMR, RAA, MTL_RAA_SP);
}
static unsigned int xgbe_calculate_per_queue_fifo(unsigned long fifo_size,
unsigned char queue_count)
static unsigned int xgbe_calculate_per_queue_fifo(unsigned int fifo_size,
unsigned int queue_count)
{
unsigned int q_fifo_size = 0;
enum xgbe_mtl_fifo_size p_fifo = XGMAC_MTL_FIFO_SIZE_256;
@ -1751,6 +1751,10 @@ static unsigned int xgbe_calculate_per_queue_fifo(unsigned long fifo_size,
q_fifo_size = XGBE_FIFO_SIZE_KB(256);
break;
}
/* The configured value is not the actual amount of fifo RAM */
q_fifo_size = min_t(unsigned int, XGBE_FIFO_MAX, q_fifo_size);
q_fifo_size = q_fifo_size / queue_count;
/* Set the queue fifo size programmable value */

1
drivers/net/ethernet/amd/xgbe/xgbe.h
View File

@ -183,6 +183,7 @@
#define XGMAC_DRIVER_CONTEXT 1
#define XGMAC_IOCTL_CONTEXT 2
#define XGBE_FIFO_MAX 81920
#define XGBE_FIFO_SIZE_B(x) (x)
#define XGBE_FIFO_SIZE_KB(x) (x * 1024)