bnxt_en: Limit RX BD pages to be no bigger than 32K.

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The RX BD length field of this device is 16-bit, so the largest buffer
size is 65535.  For LRO and GRO, we allocate native CPU pages for the
aggregation ring buffers.  It won't work if the native CPU page size is
64K or bigger.

We fix this by defining BNXT_RX_PAGE_SIZE to be native CPU page size
up to 32K.  Replace PAGE_SIZE with BNXT_RX_PAGE_SIZE in all appropriate
places related to the rx aggregation ring logic.

The next patch will add additional logic to divide the page into 32K
chunks for aggrgation ring buffers if PAGE_SIZE is bigger than
BNXT_RX_PAGE_SIZE.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Michael Chan 2016-04-25 02:30:50 -04:00 • committed by David S. Miller

parent 1fa72e29e1

commit 2839f28bd5

2 changed files with 18 additions and 9 deletions

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18

drivers/net/ethernet/broadcom/bnxt/bnxt.c

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9

drivers/net/ethernet/broadcom/bnxt/bnxt.h

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