[PATCH RFC net-next v4 6/9] iavf: switch to Page Pool

From: Alexander Lobakin
Date: Wed Jul 05 2023 - 11:58:58 EST

Now that the IAVF driver simply uses dev_alloc_page() + free_page() with
no custom recycling logics, it can easily be switched to using Page
Pool / libie API instead.
This allows to removing the whole dancing around headroom, HW buffer
size, and page order. All DMA-for-device is now done in the PP core,
for-CPU -- in the libie helper.
Use skb_mark_for_recycle() to bring back the recycling and restore the
performance. Speaking of performance: on par with the baseline and
faster with the PP optimization series applied. But the memory usage for
1500b MTU is now almost 2x lower (x86_64) thanks to allocating a page
every second descriptor.

Signed-off-by: Alexander Lobakin <aleksander.lobakin@xxxxxxxxx>
---
drivers/net/ethernet/intel/iavf/iavf_main.c | 33 +--
drivers/net/ethernet/intel/iavf/iavf_txrx.c | 247 +++++-------------
drivers/net/ethernet/intel/iavf/iavf_txrx.h | 91 +------
drivers/net/ethernet/intel/iavf/iavf_type.h | 2 -
.../net/ethernet/intel/iavf/iavf_virtchnl.c | 19 +-
5 files changed, 82 insertions(+), 310 deletions(-)

diff --git a/drivers/net/ethernet/intel/iavf/iavf_main.c b/drivers/net/ethernet/intel/iavf/iavf_main.c
index db1ed13f11bb..39c6d83e80a1 100644
--- a/drivers/net/ethernet/intel/iavf/iavf_main.c
+++ b/drivers/net/ethernet/intel/iavf/iavf_main.c
@@ -1,6 +1,8 @@
// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2013 - 2018 Intel Corporation. */

+#include <linux/net/intel/libie/rx.h>
+
#include "iavf.h"
#include "iavf_prototype.h"
#include "iavf_client.h"
@@ -698,32 +700,10 @@ static void iavf_configure_tx(struct iavf_adapter *adapter)
**/
static void iavf_configure_rx(struct iavf_adapter *adapter)
{
- unsigned int rx_buf_len = IAVF_RXBUFFER_2048;
struct iavf_hw *hw = &adapter->hw;
- int i;
-
- if (PAGE_SIZE < 8192) {
- struct net_device *netdev = adapter->netdev;

- /* For jumbo frames on systems with 4K pages we have to use
- * an order 1 page, so we might as well increase the size
- * of our Rx buffer to make better use of the available space
- */
- rx_buf_len = IAVF_RXBUFFER_3072;
-
- /* We use a 1536 buffer size for configurations with
- * standard Ethernet mtu. On x86 this gives us enough room
- * for shared info and 192 bytes of padding.
- */
- if (!IAVF_2K_TOO_SMALL_WITH_PADDING &&
- (netdev->mtu <= ETH_DATA_LEN))
- rx_buf_len = IAVF_RXBUFFER_1536 - NET_IP_ALIGN;
- }
-
- for (i = 0; i < adapter->num_active_queues; i++) {
+ for (u32 i = 0; i < adapter->num_active_queues; i++)
adapter->rx_rings[i].tail = hw->hw_addr + IAVF_QRX_TAIL1(i);
- adapter->rx_rings[i].rx_buf_len = rx_buf_len;
- }
}

/**
@@ -1590,7 +1570,6 @@ static int iavf_alloc_queues(struct iavf_adapter *adapter)
rx_ring = &adapter->rx_rings[i];
rx_ring->queue_index = i;
rx_ring->netdev = adapter->netdev;
- rx_ring->dev = &adapter->pdev->dev;
rx_ring->count = adapter->rx_desc_count;
rx_ring->itr_setting = IAVF_ITR_RX_DEF;
}
@@ -2562,11 +2541,7 @@ static void iavf_init_config_adapter(struct iavf_adapter *adapter)

netdev->netdev_ops = &iavf_netdev_ops;
iavf_set_ethtool_ops(netdev);
- netdev->watchdog_timeo = 5 * HZ;
-
- /* MTU range: 68 - 9710 */
- netdev->min_mtu = ETH_MIN_MTU;
- netdev->max_mtu = IAVF_MAX_RXBUFFER - IAVF_PACKET_HDR_PAD;
+ netdev->max_mtu = LIBIE_MAX_MTU;

if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
diff --git a/drivers/net/ethernet/intel/iavf/iavf_txrx.c b/drivers/net/ethernet/intel/iavf/iavf_txrx.c
index 789b10815d7f..d1491b481eac 100644
--- a/drivers/net/ethernet/intel/iavf/iavf_txrx.c
+++ b/drivers/net/ethernet/intel/iavf/iavf_txrx.c
@@ -689,9 +689,6 @@ int iavf_setup_tx_descriptors(struct iavf_ring *tx_ring)
**/
static void iavf_clean_rx_ring(struct iavf_ring *rx_ring)
{
- unsigned long bi_size;
- u16 i;
-
/* ring already cleared, nothing to do */
if (!rx_ring->rx_bi)
return;
@@ -701,40 +698,16 @@ static void iavf_clean_rx_ring(struct iavf_ring *rx_ring)
rx_ring->skb = NULL;
}

- /* Free all the Rx ring sk_buffs */
- for (i = 0; i < rx_ring->count; i++) {
- struct iavf_rx_buffer *rx_bi = &rx_ring->rx_bi[i];
+ /* Free all the Rx ring buffers */
+ for (u32 i = rx_ring->next_to_clean; i != rx_ring->next_to_use; ) {
+ const struct libie_rx_buffer *rx_bi = &rx_ring->rx_bi[i];

- if (!rx_bi->page)
- continue;
+ page_pool_put_full_page(rx_ring->pp, rx_bi->page, false);

- /* Invalidate cache lines that may have been written to by
- * device so that we avoid corrupting memory.
- */
- dma_sync_single_range_for_cpu(rx_ring->dev,
- rx_bi->dma,
- rx_bi->page_offset,
- rx_ring->rx_buf_len,
- DMA_FROM_DEVICE);
-
- /* free resources associated with mapping */
- dma_unmap_page_attrs(rx_ring->dev, rx_bi->dma,
- iavf_rx_pg_size(rx_ring),
- DMA_FROM_DEVICE,
- IAVF_RX_DMA_ATTR);
-
- __free_pages(rx_bi->page, iavf_rx_pg_order(rx_ring));
-
- rx_bi->page = NULL;
- rx_bi->page_offset = 0;
+ if (unlikely(++i == rx_ring->count))
+ i = 0;
}

- bi_size = sizeof(struct iavf_rx_buffer) * rx_ring->count;
- memset(rx_ring->rx_bi, 0, bi_size);
-
- /* Zero out the descriptor ring */
- memset(rx_ring->desc, 0, rx_ring->size);
-
rx_ring->next_to_clean = 0;
rx_ring->next_to_use = 0;
}
@@ -752,10 +725,13 @@ void iavf_free_rx_resources(struct iavf_ring *rx_ring)
rx_ring->rx_bi = NULL;

if (rx_ring->desc) {
- dma_free_coherent(rx_ring->dev, rx_ring->size,
+ dma_free_coherent(rx_ring->pp->p.dev, rx_ring->size,
rx_ring->desc, rx_ring->dma);
rx_ring->desc = NULL;
}
+
+ page_pool_destroy(rx_ring->pp);
+ rx_ring->pp = NULL;
}

/**
@@ -766,13 +742,19 @@ void iavf_free_rx_resources(struct iavf_ring *rx_ring)
**/
int iavf_setup_rx_descriptors(struct iavf_ring *rx_ring)
{
- struct device *dev = rx_ring->dev;
- int bi_size;
+ struct page_pool *pool;
+
+ pool = libie_rx_page_pool_create(&rx_ring->q_vector->napi,
+ rx_ring->count);
+ if (IS_ERR(pool))
+ return PTR_ERR(pool);
+
+ rx_ring->pp = pool;

/* warn if we are about to overwrite the pointer */
WARN_ON(rx_ring->rx_bi);
- bi_size = sizeof(struct iavf_rx_buffer) * rx_ring->count;
- rx_ring->rx_bi = kzalloc(bi_size, GFP_KERNEL);
+ rx_ring->rx_bi = kcalloc(rx_ring->count, sizeof(*rx_ring->rx_bi),
+ GFP_KERNEL);
if (!rx_ring->rx_bi)
goto err;

@@ -781,22 +763,27 @@ int iavf_setup_rx_descriptors(struct iavf_ring *rx_ring)
/* Round up to nearest 4K */
rx_ring->size = rx_ring->count * sizeof(union iavf_32byte_rx_desc);
rx_ring->size = ALIGN(rx_ring->size, 4096);
- rx_ring->desc = dma_alloc_coherent(dev, rx_ring->size,
+ rx_ring->desc = dma_alloc_coherent(pool->p.dev, rx_ring->size,
&rx_ring->dma, GFP_KERNEL);

if (!rx_ring->desc) {
- dev_info(dev, "Unable to allocate memory for the Rx descriptor ring, size=%d\n",
+ dev_info(pool->p.dev, "Unable to allocate memory for the Rx descriptor ring, size=%d\n",
rx_ring->size);
- goto err;
+ goto err_free_buf;
}

rx_ring->next_to_clean = 0;
rx_ring->next_to_use = 0;

return 0;
-err:
+
+err_free_buf:
kfree(rx_ring->rx_bi);
rx_ring->rx_bi = NULL;
+
+err:
+ page_pool_destroy(rx_ring->pp);
+
return -ENOMEM;
}

@@ -818,49 +805,6 @@ static inline void iavf_release_rx_desc(struct iavf_ring *rx_ring, u32 val)
writel(val, rx_ring->tail);
}

-/**
- * iavf_alloc_mapped_page - recycle or make a new page
- * @rx_ring: ring to use
- * @bi: rx_buffer struct to modify
- *
- * Returns true if the page was successfully allocated or
- * reused.
- **/
-static bool iavf_alloc_mapped_page(struct iavf_ring *rx_ring,
- struct iavf_rx_buffer *bi)
-{
- struct page *page = bi->page;
- dma_addr_t dma;
-
- /* alloc new page for storage */
- page = dev_alloc_pages(iavf_rx_pg_order(rx_ring));
- if (unlikely(!page)) {
- rx_ring->rx_stats.alloc_page_failed++;
- return false;
- }
-
- /* map page for use */
- dma = dma_map_page_attrs(rx_ring->dev, page, 0,
- iavf_rx_pg_size(rx_ring),
- DMA_FROM_DEVICE,
- IAVF_RX_DMA_ATTR);
-
- /* if mapping failed free memory back to system since
- * there isn't much point in holding memory we can't use
- */
- if (dma_mapping_error(rx_ring->dev, dma)) {
- __free_pages(page, iavf_rx_pg_order(rx_ring));
- rx_ring->rx_stats.alloc_page_failed++;
- return false;
- }
-
- bi->dma = dma;
- bi->page = page;
- bi->page_offset = IAVF_SKB_PAD;
-
- return true;
-}
-
/**
* iavf_receive_skb - Send a completed packet up the stack
* @rx_ring: rx ring in play
@@ -893,36 +837,29 @@ bool iavf_alloc_rx_buffers(struct iavf_ring *rx_ring, u16 cleaned_count)
{
u16 ntu = rx_ring->next_to_use;
union iavf_rx_desc *rx_desc;
- struct iavf_rx_buffer *bi;

/* do nothing if no valid netdev defined */
if (!rx_ring->netdev || !cleaned_count)
return false;

rx_desc = IAVF_RX_DESC(rx_ring, ntu);
- bi = &rx_ring->rx_bi[ntu];

do {
- if (!iavf_alloc_mapped_page(rx_ring, bi))
- goto no_buffers;
+ dma_addr_t addr;

- /* sync the buffer for use by the device */
- dma_sync_single_range_for_device(rx_ring->dev, bi->dma,
- bi->page_offset,
- rx_ring->rx_buf_len,
- DMA_FROM_DEVICE);
+ addr = libie_rx_alloc(rx_ring->pp, &rx_ring->rx_bi[ntu]);
+ if (unlikely(addr == DMA_MAPPING_ERROR))
+ goto no_buffers;

/* Refresh the desc even if buffer_addrs didn't change
* because each write-back erases this info.
*/
- rx_desc->read.pkt_addr = cpu_to_le64(bi->dma + bi->page_offset);
+ rx_desc->read.pkt_addr = cpu_to_le64(addr);

rx_desc++;
- bi++;
ntu++;
if (unlikely(ntu == rx_ring->count)) {
rx_desc = IAVF_RX_DESC(rx_ring, 0);
- bi = rx_ring->rx_bi;
ntu = 0;
}

@@ -941,6 +878,8 @@ bool iavf_alloc_rx_buffers(struct iavf_ring *rx_ring, u16 cleaned_count)
if (rx_ring->next_to_use != ntu)
iavf_release_rx_desc(rx_ring, ntu);

+ rx_ring->rx_stats.alloc_page_failed++;
+
/* make sure to come back via polling to try again after
* allocation failure
*/
@@ -1091,9 +1030,8 @@ static bool iavf_cleanup_headers(struct iavf_ring *rx_ring, struct sk_buff *skb)

/**
* iavf_add_rx_frag - Add contents of Rx buffer to sk_buff
- * @rx_ring: rx descriptor ring to transact packets on
- * @rx_buffer: buffer containing page to add
* @skb: sk_buff to place the data into
+ * @rx_buffer: buffer containing page to add
* @size: packet length from rx_desc
*
* This function will add the data contained in rx_buffer->page to the skb.
@@ -1101,111 +1039,52 @@ static bool iavf_cleanup_headers(struct iavf_ring *rx_ring, struct sk_buff *skb)
*
* The function will then update the page offset.
**/
-static void iavf_add_rx_frag(struct iavf_ring *rx_ring,
- struct iavf_rx_buffer *rx_buffer,
- struct sk_buff *skb,
+static void iavf_add_rx_frag(struct sk_buff *skb,
+ const struct libie_rx_buffer *rx_buffer,
unsigned int size)
{
-#if (PAGE_SIZE < 8192)
- unsigned int truesize = iavf_rx_pg_size(rx_ring) / 2;
-#else
- unsigned int truesize = SKB_DATA_ALIGN(size + IAVF_SKB_PAD);
-#endif
-
- if (!size)
- return;
+ u32 hr = rx_buffer->page->pp->p.offset;

skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, rx_buffer->page,
- rx_buffer->page_offset, size, truesize);
-}
-
-/**
- * iavf_get_rx_buffer - Fetch Rx buffer and synchronize data for use
- * @rx_ring: rx descriptor ring to transact packets on
- * @size: size of buffer to add to skb
- *
- * This function will pull an Rx buffer from the ring and synchronize it
- * for use by the CPU.
- */
-static struct iavf_rx_buffer *iavf_get_rx_buffer(struct iavf_ring *rx_ring,
- const unsigned int size)
-{
- struct iavf_rx_buffer *rx_buffer;
-
- rx_buffer = &rx_ring->rx_bi[rx_ring->next_to_clean];
- prefetchw(rx_buffer->page);
- if (!size)
- return rx_buffer;
-
- /* we are reusing so sync this buffer for CPU use */
- dma_sync_single_range_for_cpu(rx_ring->dev,
- rx_buffer->dma,
- rx_buffer->page_offset,
- size,
- DMA_FROM_DEVICE);
-
- return rx_buffer;
+ rx_buffer->offset + hr, size, rx_buffer->truesize);
}

/**
* iavf_build_skb - Build skb around an existing buffer
- * @rx_ring: Rx descriptor ring to transact packets on
* @rx_buffer: Rx buffer to pull data from
* @size: size of buffer to add to skb
*
* This function builds an skb around an existing Rx buffer, taking care
* to set up the skb correctly and avoid any memcpy overhead.
*/
-static struct sk_buff *iavf_build_skb(struct iavf_ring *rx_ring,
- struct iavf_rx_buffer *rx_buffer,
+static struct sk_buff *iavf_build_skb(const struct libie_rx_buffer *rx_buffer,
unsigned int size)
{
- void *va;
-#if (PAGE_SIZE < 8192)
- unsigned int truesize = iavf_rx_pg_size(rx_ring) / 2;
-#else
- unsigned int truesize = SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) +
- SKB_DATA_ALIGN(IAVF_SKB_PAD + size);
-#endif
+ struct page *page = rx_buffer->page;
+ u32 hr = page->pp->p.offset;
struct sk_buff *skb;
+ void *va;

- if (!rx_buffer || !size)
- return NULL;
/* prefetch first cache line of first page */
- va = page_address(rx_buffer->page) + rx_buffer->page_offset;
- net_prefetch(va);
+ va = page_address(page) + rx_buffer->offset;
+ net_prefetch(va + hr);

/* build an skb around the page buffer */
- skb = napi_build_skb(va - IAVF_SKB_PAD, truesize);
- if (unlikely(!skb))
+ skb = napi_build_skb(va, rx_buffer->truesize);
+ if (unlikely(!skb)) {
+ page_pool_put_page(page->pp, page, size, true);
return NULL;
+ }
+
+ skb_mark_for_recycle(skb);

/* update pointers within the skb to store the data */
- skb_reserve(skb, IAVF_SKB_PAD);
+ skb_reserve(skb, hr);
__skb_put(skb, size);

return skb;
}

-/**
- * iavf_put_rx_buffer - Unmap used buffer
- * @rx_ring: rx descriptor ring to transact packets on
- * @rx_buffer: rx buffer to pull data from
- *
- * This function will unmap the buffer after it's written by HW.
- */
-static void iavf_put_rx_buffer(struct iavf_ring *rx_ring,
- struct iavf_rx_buffer *rx_buffer)
-{
- if (!rx_buffer)
- return;
-
- /* we are not reusing the buffer so unmap it */
- dma_unmap_page_attrs(rx_ring->dev, rx_buffer->dma,
- iavf_rx_pg_size(rx_ring),
- DMA_FROM_DEVICE, IAVF_RX_DMA_ATTR);
-}
-
/**
* iavf_is_non_eop - process handling of non-EOP buffers
* @rx_ring: Rx ring being processed
@@ -1259,7 +1138,7 @@ static int iavf_clean_rx_irq(struct iavf_ring *rx_ring, int budget)
bool failure = false;

while (likely(total_rx_packets < (unsigned int)budget)) {
- struct iavf_rx_buffer *rx_buffer;
+ struct libie_rx_buffer *rx_buffer;
union iavf_rx_desc *rx_desc;
unsigned int size;
u16 vlan_tag = 0;
@@ -1295,26 +1174,24 @@ static int iavf_clean_rx_irq(struct iavf_ring *rx_ring, int budget)
IAVF_RXD_QW1_LENGTH_PBUF_SHIFT;

iavf_trace(clean_rx_irq, rx_ring, rx_desc, skb);
- rx_buffer = iavf_get_rx_buffer(rx_ring, size);
+
+ rx_buffer = &rx_ring->rx_bi[rx_ring->next_to_clean];
+ if (!libie_rx_sync_for_cpu(rx_buffer, size))
+ goto skip_data;

/* retrieve a buffer from the ring */
if (skb)
- iavf_add_rx_frag(rx_ring, rx_buffer, skb, size);
+ iavf_add_rx_frag(skb, rx_buffer, size);
else
- skb = iavf_build_skb(rx_ring, rx_buffer, size);
-
- iavf_put_rx_buffer(rx_ring, rx_buffer);
+ skb = iavf_build_skb(rx_buffer, size);

/* exit if we failed to retrieve a buffer */
if (!skb) {
rx_ring->rx_stats.alloc_buff_failed++;
- __free_pages(rx_buffer->page,
- iavf_rx_pg_order(rx_ring));
- rx_buffer->page = NULL;
break;
}

- rx_buffer->page = NULL;
+skip_data:
cleaned_count++;

if (iavf_is_non_eop(rx_ring, rx_desc, skb))
diff --git a/drivers/net/ethernet/intel/iavf/iavf_txrx.h b/drivers/net/ethernet/intel/iavf/iavf_txrx.h
index 2170a77f8c8d..b13d878c74c6 100644
--- a/drivers/net/ethernet/intel/iavf/iavf_txrx.h
+++ b/drivers/net/ethernet/intel/iavf/iavf_txrx.h
@@ -81,70 +81,8 @@ enum iavf_dyn_idx_t {
BIT_ULL(IAVF_FILTER_PCTYPE_NONF_UNICAST_IPV6_UDP) | \
BIT_ULL(IAVF_FILTER_PCTYPE_NONF_MULTICAST_IPV6_UDP))

-/* Supported Rx Buffer Sizes (a multiple of 128) */
-#define IAVF_RXBUFFER_1536 1536 /* 128B aligned standard Ethernet frame */
-#define IAVF_RXBUFFER_2048 2048
-#define IAVF_RXBUFFER_3072 3072 /* Used for large frames w/ padding */
-#define IAVF_MAX_RXBUFFER 9728 /* largest size for single descriptor */
-
-#define IAVF_PACKET_HDR_PAD (ETH_HLEN + ETH_FCS_LEN + (VLAN_HLEN * 2))
#define iavf_rx_desc iavf_32byte_rx_desc

-#define IAVF_RX_DMA_ATTR \
- (DMA_ATTR_SKIP_CPU_SYNC | DMA_ATTR_WEAK_ORDERING)
-
-/* Attempt to maximize the headroom available for incoming frames. We
- * use a 2K buffer for receives and need 1536/1534 to store the data for
- * the frame. This leaves us with 512 bytes of room. From that we need
- * to deduct the space needed for the shared info and the padding needed
- * to IP align the frame.
- *
- * Note: For cache line sizes 256 or larger this value is going to end
- * up negative. In these cases we should fall back to the legacy
- * receive path.
- */
-#if (PAGE_SIZE < 8192)
-#define IAVF_2K_TOO_SMALL_WITH_PADDING \
-((NET_SKB_PAD + IAVF_RXBUFFER_1536) > SKB_WITH_OVERHEAD(IAVF_RXBUFFER_2048))
-
-static inline int iavf_compute_pad(int rx_buf_len)
-{
- int page_size, pad_size;
-
- page_size = ALIGN(rx_buf_len, PAGE_SIZE / 2);
- pad_size = SKB_WITH_OVERHEAD(page_size) - rx_buf_len;
-
- return pad_size;
-}
-
-static inline int iavf_skb_pad(void)
-{
- int rx_buf_len;
-
- /* If a 2K buffer cannot handle a standard Ethernet frame then
- * optimize padding for a 3K buffer instead of a 1.5K buffer.
- *
- * For a 3K buffer we need to add enough padding to allow for
- * tailroom due to NET_IP_ALIGN possibly shifting us out of
- * cache-line alignment.
- */
- if (IAVF_2K_TOO_SMALL_WITH_PADDING)
- rx_buf_len = IAVF_RXBUFFER_3072 + SKB_DATA_ALIGN(NET_IP_ALIGN);
- else
- rx_buf_len = IAVF_RXBUFFER_1536;
-
- /* if needed make room for NET_IP_ALIGN */
- rx_buf_len -= NET_IP_ALIGN;
-
- return iavf_compute_pad(rx_buf_len);
-}
-
-#define IAVF_SKB_PAD iavf_skb_pad()
-#else
-#define IAVF_2K_TOO_SMALL_WITH_PADDING false
-#define IAVF_SKB_PAD (NET_SKB_PAD + NET_IP_ALIGN)
-#endif
-
/**
* iavf_test_staterr - tests bits in Rx descriptor status and error fields
* @rx_desc: pointer to receive descriptor (in le64 format)
@@ -263,12 +201,6 @@ struct iavf_tx_buffer {
u32 tx_flags;
};

-struct iavf_rx_buffer {
- dma_addr_t dma;
- struct page *page;
- __u32 page_offset;
-};
-
struct iavf_queue_stats {
u64 packets;
u64 bytes;
@@ -311,16 +243,19 @@ enum iavf_ring_state_t {
struct iavf_ring {
struct iavf_ring *next; /* pointer to next ring in q_vector */
void *desc; /* Descriptor ring memory */
- struct device *dev; /* Used for DMA mapping */
+ union {
+ struct page_pool *pp; /* Used on Rx for buffer management */
+ struct device *dev; /* Used on Tx for DMA mapping */
+ };
struct net_device *netdev; /* netdev ring maps to */
union {
+ struct libie_rx_buffer *rx_bi;
struct iavf_tx_buffer *tx_bi;
- struct iavf_rx_buffer *rx_bi;
};
DECLARE_BITMAP(state, __IAVF_RING_STATE_NBITS);
+ u8 __iomem *tail;
u16 queue_index; /* Queue number of ring */
u8 dcb_tc; /* Traffic class of ring */
- u8 __iomem *tail;

/* high bit set means dynamic, use accessors routines to read/write.
* hardware only supports 2us resolution for the ITR registers.
@@ -329,9 +264,8 @@ struct iavf_ring {
*/
u16 itr_setting;

- u16 count; /* Number of descriptors */
u16 reg_idx; /* HW register index of the ring */
- u16 rx_buf_len;
+ u16 count; /* Number of descriptors */

/* used in interrupt processing */
u16 next_to_use;
@@ -398,17 +332,6 @@ struct iavf_ring_container {
#define iavf_for_each_ring(pos, head) \
for (pos = (head).ring; pos != NULL; pos = pos->next)

-static inline unsigned int iavf_rx_pg_order(struct iavf_ring *ring)
-{
-#if (PAGE_SIZE < 8192)
- if (ring->rx_buf_len > (PAGE_SIZE / 2))
- return 1;
-#endif
- return 0;
-}
-
-#define iavf_rx_pg_size(_ring) (PAGE_SIZE << iavf_rx_pg_order(_ring))
-
bool iavf_alloc_rx_buffers(struct iavf_ring *rxr, u16 cleaned_count);
netdev_tx_t iavf_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
int iavf_setup_tx_descriptors(struct iavf_ring *tx_ring);
diff --git a/drivers/net/ethernet/intel/iavf/iavf_type.h b/drivers/net/ethernet/intel/iavf/iavf_type.h
index 3030ba330326..bb90d8f3ad7e 100644
--- a/drivers/net/ethernet/intel/iavf/iavf_type.h
+++ b/drivers/net/ethernet/intel/iavf/iavf_type.h
@@ -10,8 +10,6 @@
#include "iavf_adminq.h"
#include "iavf_devids.h"

-#define IAVF_RXQ_CTX_DBUFF_SHIFT 7
-
/* IAVF_MASK is a macro used on 32 bit registers */
#define IAVF_MASK(mask, shift) ((u32)(mask) << (shift))

diff --git a/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c b/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c
index fdddc3588487..5341508b429f 100644
--- a/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c
+++ b/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c
@@ -1,6 +1,8 @@
// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2013 - 2018 Intel Corporation. */

+#include <linux/net/intel/libie/rx.h>
+
#include "iavf.h"
#include "iavf_prototype.h"
#include "iavf_client.h"
@@ -269,14 +271,13 @@ int iavf_get_vf_vlan_v2_caps(struct iavf_adapter *adapter)
void iavf_configure_queues(struct iavf_adapter *adapter)
{
struct virtchnl_vsi_queue_config_info *vqci;
- int i, max_frame = adapter->vf_res->max_mtu;
+ u32 i, max_frame = adapter->vf_res->max_mtu;
+ struct iavf_ring *rxq = adapter->rx_rings;
int pairs = adapter->num_active_queues;
struct virtchnl_queue_pair_info *vqpi;
+ u32 hr, max_len;
size_t len;

- if (max_frame > IAVF_MAX_RXBUFFER || !max_frame)
- max_frame = IAVF_MAX_RXBUFFER;
-
if (adapter->current_op != VIRTCHNL_OP_UNKNOWN) {
/* bail because we already have a command pending */
dev_err(&adapter->pdev->dev, "Cannot configure queues, command %d pending\n",
@@ -289,9 +290,9 @@ void iavf_configure_queues(struct iavf_adapter *adapter)
if (!vqci)
return;

- /* Limit maximum frame size when jumbo frames is not enabled */
- if (adapter->netdev->mtu <= ETH_DATA_LEN)
- max_frame = IAVF_RXBUFFER_1536 - NET_IP_ALIGN;
+ hr = rxq->pp->p.offset;
+ max_len = rxq->pp->p.max_len;
+ max_frame = min_not_zero(max_frame, LIBIE_MAX_RX_FRM_LEN(hr));

vqci->vsi_id = adapter->vsi_res->vsi_id;
vqci->num_queue_pairs = pairs;
@@ -309,9 +310,7 @@ void iavf_configure_queues(struct iavf_adapter *adapter)
vqpi->rxq.ring_len = adapter->rx_rings[i].count;
vqpi->rxq.dma_ring_addr = adapter->rx_rings[i].dma;
vqpi->rxq.max_pkt_size = max_frame;
- vqpi->rxq.databuffer_size =
- ALIGN(adapter->rx_rings[i].rx_buf_len,
- BIT_ULL(IAVF_RXQ_CTX_DBUFF_SHIFT));
+ vqpi->rxq.databuffer_size = max_len;
vqpi++;
}

--
2.41.0