diff options
| author |   Ron Mercer <ron.mercer@qlogic.com> | 2009-06-10 15:49:34 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2009-06-11 02:37:05 -0700 |
| commit | b8facca01ba381c3f8ff2391fbe3860ebc6a6bdc (patch) | |
| tree | 11e7b481ab9436d5cbaf616101b46aa67cb4bc36 /drivers/net/qlge/qlge.h | |
| parent | qlge: Relax alignment on TX harware queue. (diff) | |
| download | linux-dev-b8facca01ba381c3f8ff2391fbe3860ebc6a6bdc.tar.xz linux-dev-b8facca01ba381c3f8ff2391fbe3860ebc6a6bdc.zip | |
qlge: Allow RX buf rings to be > than 4096 bytes.
RX buffer rings can be comprised of non-contiguous fixed
size chunks of memory. The ring is given to the hardware
as a pointer to a location that stores the location of
the queue. If the queue is greater than 4096 bytes then
the hardware gets a list of said pointers.
This patch addes the necessary logic to generate the list if
the queue size exceeds 4096.
Signed-off-by: Ron Mercer <ron.mercer@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/qlge/qlge.h')
| -rw-r--r-- | drivers/net/qlge/qlge.h | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/net/qlge/qlge.h b/drivers/net/qlge/qlge.h index b1ddfd1b8d53..156e02e8905d 100644 --- a/drivers/net/qlge/qlge.h +++ b/drivers/net/qlge/qlge.h @@ -41,7 +41,18 @@ #define NUM_SMALL_BUFFERS 512 #define NUM_LARGE_BUFFERS 512 +#define DB_PAGE_SIZE 4096 + +/* Calculate the number of (4k) pages required to + * contain a buffer queue of the given length. + */ +#define MAX_DB_PAGES_PER_BQ(x) \ + (((x * sizeof(u64)) / DB_PAGE_SIZE) + \ + (((x * sizeof(u64)) % DB_PAGE_SIZE) ? 1 : 0)) +#define RX_RING_SHADOW_SPACE (sizeof(u64) + \ + MAX_DB_PAGES_PER_BQ(NUM_SMALL_BUFFERS) * sizeof(u64) + \ + MAX_DB_PAGES_PER_BQ(NUM_LARGE_BUFFERS) * sizeof(u64)) #define SMALL_BUFFER_SIZE 256 #define LARGE_BUFFER_SIZE PAGE_SIZE #define MAX_SPLIT_SIZE 1023 @@ -65,8 +76,6 @@ #define TX_DESC_PER_OAL 0 #endif -#define DB_PAGE_SIZE 4096 - /* MPI test register definitions. This register * is used for determining alternate NIC function's * PCI->func number. |