netdev - [PATCH net-next 12/22] sfc: Document current usage of efx_rx_buffer::len and efx_nic::rx_buffer

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Date:	Mon, 11 Mar 2013 19:55:53 +0000
From:	Ben Hutchings <bhutchings@...arflare.com>
To:	David Miller <davem@...emloft.net>
CC:	<netdev@...r.kernel.org>, <linux-net-drivers@...arflare.com>,
	<scrum-linux@...arflare.com>
Subject: [PATCH net-next 12/22] sfc: Document current usage of
 efx_rx_buffer::len and efx_nic::rx_buffer_len

Signed-off-by: Ben Hutchings <bhutchings@...arflare.com>
---
 drivers/net/ethernet/sfc/net_driver.h |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h
index 9e90081..f74411f 100644
--- a/drivers/net/ethernet/sfc/net_driver.h
+++ b/drivers/net/ethernet/sfc/net_driver.h
@@ -209,7 +209,8 @@ struct efx_tx_queue {
  * @page: The associated page buffer.
  *	Will be %NULL if the buffer slot is currently free.
  * @page_offset: Offset within page
- * @len: Buffer length, in bytes.
+ * @len: If pending: length for DMA descriptor.
+ *	If completed: received length, excluding hash prefix.
  * @flags: Flags for buffer and packet state.
  */
 struct efx_rx_buffer {
@@ -668,7 +669,8 @@ struct vfdi_status;
  * @n_channels: Number of channels in use
  * @n_rx_channels: Number of channels used for RX (= number of RX queues)
  * @n_tx_channels: Number of channels used for TX
- * @rx_buffer_len: RX buffer length
+ * @rx_buffer_len: RX buffer length, including start alignment but excluding
+ *	any metadata
  * @rx_buffer_order: Order (log2) of number of pages for each RX buffer
  * @rx_hash_key: Toeplitz hash key for RSS
  * @rx_indir_table: Indirection table for RSS
-- 
Ben Hutchings, Senior Software Engineer, Solarflare Communications
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.




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