From 306ec721d043bbe5e818d59fbb37c28d999b5d8b Mon Sep 17 00:00:00 2001 From: Alexander Lobakin Date: Thu, 18 Apr 2024 13:36:07 +0200 Subject: net: intel: introduce {, Intel} Ethernet common library Not a secret there's a ton of code duplication between two and more Intel ethernet modules. Before introducing new changes, which would need to be copied over again, start decoupling the already existing duplicate functionality into a new module, which will be shared between several Intel Ethernet drivers. Add the lookup table which converts 8/10-bit hardware packet type into a parsed bitfield structure for easy checking packet format parameters, such as payload level, IP version, etc. This is currently used by i40e, ice and iavf and it's all the same in all three drivers. The only difference introduced in this implementation is that instead of defining a 256 (or 1024 in case of ice) element array, add unlikely() condition to limit the input to 154 (current maximum non-reserved packet type). There's no reason to waste 600 (or even 3600) bytes only to not hurt very unlikely exception packets. The hash computation function now takes payload level directly as a pkt_hash_type. There's a couple cases when non-IP ptypes are marked as L3 payload and in the previous versions their hash level would be 2, not 3. But skb_set_hash() only sees difference between L4 and non-L4, thus this won't change anything at all. The module is behind the hidden Kconfig symbol, which the drivers will select when needed. The exports are behind 'LIBIE' namespace to limit the scope of the functions. Not that non-HW-specific symbols will live in yet another module, libeth. This is done to easily distinguish pretty generic code ready for reusing by any other vendor and/or for moving the layer up from the code useful in Intel's 1-100G drivers only. Signed-off-by: Alexander Lobakin Signed-off-by: Tony Nguyen --- include/linux/net/intel/libie/rx.h | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 include/linux/net/intel/libie/rx.h (limited to 'include/linux/net/intel/libie/rx.h') diff --git a/include/linux/net/intel/libie/rx.h b/include/linux/net/intel/libie/rx.h new file mode 100644 index 000000000000..37c5c8f26fb9 --- /dev/null +++ b/include/linux/net/intel/libie/rx.h @@ -0,0 +1,33 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* Copyright (C) 2024 Intel Corporation */ + +#ifndef __LIBIE_RX_H +#define __LIBIE_RX_H + +#include + +/* O(1) converting i40e/ice/iavf's 8/10-bit hardware packet type to a parsed + * bitfield struct. + */ + +#define LIBIE_RX_PT_NUM 154 + +extern const struct libeth_rx_pt libie_rx_pt_lut[LIBIE_RX_PT_NUM]; + +/** + * libie_rx_pt_parse - convert HW packet type to software bitfield structure + * @pt: 10-bit hardware packet type value from the descriptor + * + * ```libie_rx_pt_lut``` must be accessed only using this wrapper. + * + * Return: parsed bitfield struct corresponding to the provided ptype. + */ +static inline struct libeth_rx_pt libie_rx_pt_parse(u32 pt) +{ + if (unlikely(pt >= LIBIE_RX_PT_NUM)) + pt = 0; + + return libie_rx_pt_lut[pt]; +} + +#endif /* __LIBIE_RX_H */ -- cgit v1.2.3 From 5fa4caff59f251bf9f766fc48c9f0a774a9216a0 Mon Sep 17 00:00:00 2001 From: Alexander Lobakin Date: Thu, 18 Apr 2024 13:36:15 +0200 Subject: iavf: switch to Page Pool 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 / libeth 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 libeth 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 Signed-off-by: Tony Nguyen --- drivers/net/ethernet/intel/iavf/iavf_main.c | 7 +- drivers/net/ethernet/intel/iavf/iavf_txrx.c | 257 +++++++----------------- drivers/net/ethernet/intel/iavf/iavf_txrx.h | 34 +--- drivers/net/ethernet/intel/iavf/iavf_virtchnl.c | 10 +- include/linux/net/intel/libie/rx.h | 17 ++ 5 files changed, 111 insertions(+), 214 deletions(-) (limited to 'include/linux/net/intel/libie/rx.h') diff --git a/drivers/net/ethernet/intel/iavf/iavf_main.c b/drivers/net/ethernet/intel/iavf/iavf_main.c index ffb71a62b105..7e0de0a9b883 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 + #include "iavf.h" #include "iavf_prototype.h" /* All iavf tracepoints are defined by the include below, which must @@ -45,6 +47,7 @@ MODULE_DEVICE_TABLE(pci, iavf_pci_tbl); MODULE_ALIAS("i40evf"); MODULE_AUTHOR("Intel Corporation, "); MODULE_DESCRIPTION("Intel(R) Ethernet Adaptive Virtual Function Network Driver"); +MODULE_IMPORT_NS(LIBETH); MODULE_IMPORT_NS(LIBIE); MODULE_LICENSE("GPL v2"); @@ -1586,7 +1589,6 @@ 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; } @@ -2613,9 +2615,8 @@ static void iavf_init_config_adapter(struct iavf_adapter *adapter) 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 2ec68b51bebe..26b424fd6718 100644 --- a/drivers/net/ethernet/intel/iavf/iavf_txrx.c +++ b/drivers/net/ethernet/intel/iavf/iavf_txrx.c @@ -690,11 +690,8 @@ err: **/ 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) + if (!rx_ring->rx_fqes) return; if (rx_ring->skb) { @@ -702,40 +699,16 @@ 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 libeth_fqe *rx_fqes = &rx_ring->rx_fqes[i]; - if (!rx_bi->page) - continue; + page_pool_put_full_page(rx_ring->pp, rx_fqes->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, - IAVF_RXBUFFER_3072, - 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_page(rx_bi->page); - - 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; } @@ -748,15 +721,22 @@ static void iavf_clean_rx_ring(struct iavf_ring *rx_ring) **/ void iavf_free_rx_resources(struct iavf_ring *rx_ring) { + struct libeth_fq fq = { + .fqes = rx_ring->rx_fqes, + .pp = rx_ring->pp, + }; + iavf_clean_rx_ring(rx_ring); - kfree(rx_ring->rx_bi); - 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; } + + libeth_rx_fq_destroy(&fq); + rx_ring->rx_fqes = NULL; + rx_ring->pp = NULL; } /** @@ -767,26 +747,32 @@ 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; - - /* 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); - if (!rx_ring->rx_bi) - goto err; + struct libeth_fq fq = { + .count = rx_ring->count, + .buf_len = LIBIE_MAX_RX_BUF_LEN, + .nid = NUMA_NO_NODE, + }; + int ret; + + ret = libeth_rx_fq_create(&fq, &rx_ring->q_vector->napi); + if (ret) + return ret; + + rx_ring->pp = fq.pp; + rx_ring->rx_fqes = fq.fqes; + rx_ring->truesize = fq.truesize; + rx_ring->rx_buf_len = fq.buf_len; u64_stats_init(&rx_ring->syncp); /* 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(fq.pp->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(fq.pp->p.dev, "Unable to allocate memory for the Rx descriptor ring, size=%d\n", rx_ring->size); goto err; } @@ -795,9 +781,12 @@ int iavf_setup_rx_descriptors(struct iavf_ring *rx_ring) rx_ring->next_to_use = 0; return 0; + err: - kfree(rx_ring->rx_bi); - rx_ring->rx_bi = NULL; + libeth_rx_fq_destroy(&fq); + rx_ring->rx_fqes = NULL; + rx_ring->pp = NULL; + return -ENOMEM; } @@ -819,49 +808,6 @@ static 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 @@ -892,38 +838,37 @@ static void iavf_receive_skb(struct iavf_ring *rx_ring, **/ bool iavf_alloc_rx_buffers(struct iavf_ring *rx_ring, u16 cleaned_count) { + const struct libeth_fq_fp fq = { + .pp = rx_ring->pp, + .fqes = rx_ring->rx_fqes, + .truesize = rx_ring->truesize, + .count = rx_ring->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, - IAVF_RXBUFFER_3072, - DMA_FROM_DEVICE); + addr = libeth_rx_alloc(&fq, ntu); + if (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; } @@ -942,6 +887,8 @@ no_buffers: 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 */ @@ -1090,9 +1037,8 @@ 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. @@ -1100,105 +1046,49 @@ 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 libeth_fqe *rx_buffer, unsigned int size) { - unsigned int truesize = SKB_DATA_ALIGN(size + IAVF_SKB_PAD); - - 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 libeth_fqe *rx_buffer, unsigned int size) { - void *va; - unsigned int truesize = SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) + - SKB_DATA_ALIGN(IAVF_SKB_PAD + size); + u32 hr = rx_buffer->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(rx_buffer->page) + rx_buffer->offset; + net_prefetch(va + hr); /* build an skb around the page buffer */ - skb = napi_build_skb(va - IAVF_SKB_PAD, truesize); + skb = napi_build_skb(va, rx_buffer->truesize); if (unlikely(!skb)) 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, PAGE_SIZE, - DMA_FROM_DEVICE, IAVF_RX_DMA_ATTR); - - /* clear contents of buffer_info */ - rx_buffer->page = NULL; -} - /** * iavf_is_non_eop - process handling of non-EOP buffers * @rx_ring: Rx ring being processed @@ -1252,7 +1142,7 @@ 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 libeth_fqe *rx_buffer; union iavf_rx_desc *rx_desc; unsigned int size; u16 vlan_tag = 0; @@ -1287,13 +1177,16 @@ static int iavf_clean_rx_irq(struct iavf_ring *rx_ring, int budget) size = FIELD_GET(IAVF_RXD_QW1_LENGTH_PBUF_MASK, qword); iavf_trace(clean_rx_irq, rx_ring, rx_desc, skb); - rx_buffer = iavf_get_rx_buffer(rx_ring, size); + + rx_buffer = &rx_ring->rx_fqes[rx_ring->next_to_clean]; + if (!libeth_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); + skb = iavf_build_skb(rx_buffer, size); /* exit if we failed to retrieve a buffer */ if (!skb) { @@ -1301,10 +1194,10 @@ static int iavf_clean_rx_irq(struct iavf_ring *rx_ring, int budget) break; } - iavf_put_rx_buffer(rx_ring, rx_buffer); +skip_data: cleaned_count++; - if (iavf_is_non_eop(rx_ring, rx_desc, skb)) + if (iavf_is_non_eop(rx_ring, rx_desc, skb) || unlikely(!skb)) continue; /* ERR_MASK will only have valid bits if EOP set, and diff --git a/drivers/net/ethernet/intel/iavf/iavf_txrx.h b/drivers/net/ethernet/intel/iavf/iavf_txrx.h index ed559fa6f214..d7b5587aeb8e 100644 --- a/drivers/net/ethernet/intel/iavf/iavf_txrx.h +++ b/drivers/net/ethernet/intel/iavf/iavf_txrx.h @@ -80,18 +80,8 @@ 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_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) - -#define IAVF_SKB_PAD (NET_SKB_PAD + NET_IP_ALIGN) - /** * iavf_test_staterr - tests bits in Rx descriptor status and error fields * @rx_desc: pointer to receive descriptor (in le64 format) @@ -210,12 +200,6 @@ 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; @@ -251,13 +235,18 @@ struct iavf_rx_queue_stats { 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 libeth_fqe *rx_fqes; struct iavf_tx_buffer *tx_bi; - struct iavf_rx_buffer *rx_bi; }; u8 __iomem *tail; + u32 truesize; + u16 queue_index; /* Queue number of ring */ /* high bit set means dynamic, use accessors routines to read/write. @@ -305,6 +294,8 @@ struct iavf_ring { * iavf_clean_rx_ring_irq() is called * for this ring. */ + + u32 rx_buf_len; } ____cacheline_internodealigned_in_smp; #define IAVF_ITR_ADAPTIVE_MIN_INC 0x0002 @@ -328,13 +319,6 @@ 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) -{ - 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_virtchnl.c b/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c index f8e9f859a4f1..1e543f6a7c30 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 + #include "iavf.h" #include "iavf_prototype.h" @@ -268,13 +270,13 @@ 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; int pairs = adapter->num_active_queues; struct virtchnl_queue_pair_info *vqpi; + u32 i, max_frame; size_t len; - if (max_frame > IAVF_MAX_RXBUFFER || !max_frame) - max_frame = IAVF_MAX_RXBUFFER; + max_frame = LIBIE_MAX_RX_FRM_LEN(adapter->rx_rings->pp->p.offset); + max_frame = min_not_zero(adapter->vf_res->max_mtu, max_frame); if (adapter->current_op != VIRTCHNL_OP_UNKNOWN) { /* bail because we already have a command pending */ @@ -304,7 +306,7 @@ 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 = IAVF_RXBUFFER_3072; + vqpi->rxq.databuffer_size = adapter->rx_rings[i].rx_buf_len; if (CRC_OFFLOAD_ALLOWED(adapter)) vqpi->rxq.crc_disable = !!(adapter->netdev->features & NETIF_F_RXFCS); diff --git a/include/linux/net/intel/libie/rx.h b/include/linux/net/intel/libie/rx.h index 37c5c8f26fb9..8e97775f1d66 100644 --- a/include/linux/net/intel/libie/rx.h +++ b/include/linux/net/intel/libie/rx.h @@ -6,6 +6,23 @@ #include +/* Rx buffer management */ + +/* The largest size for a single descriptor as per HW */ +#define LIBIE_MAX_RX_BUF_LEN 9728U +/* "True" HW-writeable space: minimum from SW and HW values */ +#define LIBIE_RX_BUF_LEN(hr) min_t(u32, LIBETH_RX_PAGE_LEN(hr), \ + LIBIE_MAX_RX_BUF_LEN) + +/* The maximum frame size as per HW (S/G) */ +#define __LIBIE_MAX_RX_FRM_LEN 16382U +/* ATST, HW can chain up to 5 Rx descriptors */ +#define LIBIE_MAX_RX_FRM_LEN(hr) \ + min_t(u32, __LIBIE_MAX_RX_FRM_LEN, LIBIE_RX_BUF_LEN(hr) * 5) +/* Maximum frame size minus LL overhead */ +#define LIBIE_MAX_MTU \ + (LIBIE_MAX_RX_FRM_LEN(LIBETH_MAX_HEADROOM) - LIBETH_RX_LL_LEN) + /* O(1) converting i40e/ice/iavf's 8/10-bit hardware packet type to a parsed * bitfield struct. */ -- cgit v1.2.3