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Merge branch '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net-queue

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Jeff Kirsher says:

====================
Intel Wired LAN Driver Updates 2017-10-10

This series contains updates to i40e only.

Stefano Brivio fixes the grammar in a function header comment.

Alex fixes a memory leak where we were not correctly placing the pages
from buffers that had been used to return a filter programming status
back on the ring.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2017-10-10 13:17:11 -07:00
commit 3668bb8da1
2 changed files with 37 additions and 28 deletions
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2
drivers/net/ethernet/intel/i40e/i40e_nvm.c
View file

@ -298,7 +298,7 @@ static i40e_status i40e_read_nvm_word_aq(struct i40e_hw *hw, u16 offset,
} }
/** /**
* __i40e_read_nvm_word - Reads nvm word, assumes called does the locking * __i40e_read_nvm_word - Reads nvm word, assumes caller does the locking
* @hw: pointer to the HW structure * @hw: pointer to the HW structure
* @offset: offset of the Shadow RAM word to read (0x000000 - 0x001FFF) * @offset: offset of the Shadow RAM word to read (0x000000 - 0x001FFF)
* @data: word read from the Shadow RAM * @data: word read from the Shadow RAM

63
drivers/net/ethernet/intel/i40e/i40e_txrx.c
View file

@ -1037,6 +1037,32 @@ reset_latency:
return false; return false;
} }
/**
* i40e_reuse_rx_page - page flip buffer and store it back on the ring
* @rx_ring: rx descriptor ring to store buffers on
* @old_buff: donor buffer to have page reused
*
* Synchronizes page for reuse by the adapter
**/
static void i40e_reuse_rx_page(struct i40e_ring *rx_ring,
struct i40e_rx_buffer *old_buff)
{
struct i40e_rx_buffer *new_buff;
u16 nta = rx_ring->next_to_alloc;
new_buff = &rx_ring->rx_bi[nta];
/* update, and store next to alloc */
nta++;
rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0;
/* transfer page from old buffer to new buffer */
new_buff->dma = old_buff->dma;
new_buff->page = old_buff->page;
new_buff->page_offset = old_buff->page_offset;
new_buff->pagecnt_bias = old_buff->pagecnt_bias;
}
/** /**
* i40e_rx_is_programming_status - check for programming status descriptor * i40e_rx_is_programming_status - check for programming status descriptor
* @qw: qword representing status_error_len in CPU ordering * @qw: qword representing status_error_len in CPU ordering
@ -1071,15 +1097,24 @@ static void i40e_clean_programming_status(struct i40e_ring *rx_ring,
union i40e_rx_desc *rx_desc, union i40e_rx_desc *rx_desc,
u64 qw) u64 qw)
{ {
u32 ntc = rx_ring->next_to_clean + 1; struct i40e_rx_buffer *rx_buffer;
u32 ntc = rx_ring->next_to_clean;
u8 id; u8 id;
/* fetch, update, and store next to clean */ /* fetch, update, and store next to clean */
rx_buffer = &rx_ring->rx_bi[ntc++];
ntc = (ntc < rx_ring->count) ? ntc : 0; ntc = (ntc < rx_ring->count) ? ntc : 0;
rx_ring->next_to_clean = ntc; rx_ring->next_to_clean = ntc;
prefetch(I40E_RX_DESC(rx_ring, ntc)); prefetch(I40E_RX_DESC(rx_ring, ntc));
/* place unused page back on the ring */
i40e_reuse_rx_page(rx_ring, rx_buffer);
rx_ring->rx_stats.page_reuse_count++;
/* clear contents of buffer_info */
rx_buffer->page = NULL;
id = (qw & I40E_RX_PROG_STATUS_DESC_QW1_PROGID_MASK) >> id = (qw & I40E_RX_PROG_STATUS_DESC_QW1_PROGID_MASK) >>
I40E_RX_PROG_STATUS_DESC_QW1_PROGID_SHIFT; I40E_RX_PROG_STATUS_DESC_QW1_PROGID_SHIFT;
@ -1638,32 +1673,6 @@ static bool i40e_cleanup_headers(struct i40e_ring *rx_ring, struct sk_buff *skb,
return false; return false;
} }
/**
* i40e_reuse_rx_page - page flip buffer and store it back on the ring
* @rx_ring: rx descriptor ring to store buffers on
* @old_buff: donor buffer to have page reused
*
* Synchronizes page for reuse by the adapter
**/
static void i40e_reuse_rx_page(struct i40e_ring *rx_ring,
struct i40e_rx_buffer *old_buff)
{
struct i40e_rx_buffer *new_buff;
u16 nta = rx_ring->next_to_alloc;
new_buff = &rx_ring->rx_bi[nta];
/* update, and store next to alloc */
nta++;
rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0;
/* transfer page from old buffer to new buffer */
new_buff->dma = old_buff->dma;
new_buff->page = old_buff->page;
new_buff->page_offset = old_buff->page_offset;
new_buff->pagecnt_bias = old_buff->pagecnt_bias;
}
/** /**
* i40e_page_is_reusable - check if any reuse is possible * i40e_page_is_reusable - check if any reuse is possible
* @page: page struct to check * @page: page struct to check