![Tejun Heo](/assets/img/avatar_default.png)
percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
942 lines
26 KiB
C
942 lines
26 KiB
C
/*
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* Copyright (c) 2007 Mellanox Technologies. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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#include <linux/mlx4/cq.h>
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#include <linux/slab.h>
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#include <linux/mlx4/qp.h>
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#include <linux/skbuff.h>
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#include <linux/if_ether.h>
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#include <linux/if_vlan.h>
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#include <linux/vmalloc.h>
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#include "mlx4_en.h"
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static int mlx4_en_get_frag_header(struct skb_frag_struct *frags, void **mac_hdr,
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void **ip_hdr, void **tcpudp_hdr,
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u64 *hdr_flags, void *priv)
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{
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*mac_hdr = page_address(frags->page) + frags->page_offset;
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*ip_hdr = *mac_hdr + ETH_HLEN;
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*tcpudp_hdr = (struct tcphdr *)(*ip_hdr + sizeof(struct iphdr));
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*hdr_flags = LRO_IPV4 | LRO_TCP;
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return 0;
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}
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static int mlx4_en_alloc_frag(struct mlx4_en_priv *priv,
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struct mlx4_en_rx_desc *rx_desc,
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struct skb_frag_struct *skb_frags,
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struct mlx4_en_rx_alloc *ring_alloc,
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int i)
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{
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struct mlx4_en_dev *mdev = priv->mdev;
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struct mlx4_en_frag_info *frag_info = &priv->frag_info[i];
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struct mlx4_en_rx_alloc *page_alloc = &ring_alloc[i];
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struct page *page;
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dma_addr_t dma;
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if (page_alloc->offset == frag_info->last_offset) {
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/* Allocate new page */
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page = alloc_pages(GFP_ATOMIC | __GFP_COMP, MLX4_EN_ALLOC_ORDER);
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if (!page)
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return -ENOMEM;
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skb_frags[i].page = page_alloc->page;
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skb_frags[i].page_offset = page_alloc->offset;
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page_alloc->page = page;
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page_alloc->offset = frag_info->frag_align;
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} else {
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page = page_alloc->page;
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get_page(page);
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skb_frags[i].page = page;
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skb_frags[i].page_offset = page_alloc->offset;
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page_alloc->offset += frag_info->frag_stride;
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}
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dma = pci_map_single(mdev->pdev, page_address(skb_frags[i].page) +
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skb_frags[i].page_offset, frag_info->frag_size,
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PCI_DMA_FROMDEVICE);
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rx_desc->data[i].addr = cpu_to_be64(dma);
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return 0;
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}
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static int mlx4_en_init_allocator(struct mlx4_en_priv *priv,
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struct mlx4_en_rx_ring *ring)
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{
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struct mlx4_en_rx_alloc *page_alloc;
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int i;
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for (i = 0; i < priv->num_frags; i++) {
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page_alloc = &ring->page_alloc[i];
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page_alloc->page = alloc_pages(GFP_ATOMIC | __GFP_COMP,
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MLX4_EN_ALLOC_ORDER);
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if (!page_alloc->page)
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goto out;
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page_alloc->offset = priv->frag_info[i].frag_align;
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en_dbg(DRV, priv, "Initialized allocator:%d with page:%p\n",
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i, page_alloc->page);
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}
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return 0;
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out:
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while (i--) {
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page_alloc = &ring->page_alloc[i];
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put_page(page_alloc->page);
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page_alloc->page = NULL;
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}
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return -ENOMEM;
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}
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static void mlx4_en_destroy_allocator(struct mlx4_en_priv *priv,
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struct mlx4_en_rx_ring *ring)
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{
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struct mlx4_en_rx_alloc *page_alloc;
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int i;
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for (i = 0; i < priv->num_frags; i++) {
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page_alloc = &ring->page_alloc[i];
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en_dbg(DRV, priv, "Freeing allocator:%d count:%d\n",
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i, page_count(page_alloc->page));
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put_page(page_alloc->page);
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page_alloc->page = NULL;
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}
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}
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static void mlx4_en_init_rx_desc(struct mlx4_en_priv *priv,
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struct mlx4_en_rx_ring *ring, int index)
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{
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struct mlx4_en_rx_desc *rx_desc = ring->buf + ring->stride * index;
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struct skb_frag_struct *skb_frags = ring->rx_info +
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(index << priv->log_rx_info);
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int possible_frags;
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int i;
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/* Set size and memtype fields */
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for (i = 0; i < priv->num_frags; i++) {
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skb_frags[i].size = priv->frag_info[i].frag_size;
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rx_desc->data[i].byte_count =
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cpu_to_be32(priv->frag_info[i].frag_size);
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rx_desc->data[i].lkey = cpu_to_be32(priv->mdev->mr.key);
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}
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/* If the number of used fragments does not fill up the ring stride,
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* remaining (unused) fragments must be padded with null address/size
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* and a special memory key */
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possible_frags = (ring->stride - sizeof(struct mlx4_en_rx_desc)) / DS_SIZE;
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for (i = priv->num_frags; i < possible_frags; i++) {
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rx_desc->data[i].byte_count = 0;
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rx_desc->data[i].lkey = cpu_to_be32(MLX4_EN_MEMTYPE_PAD);
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rx_desc->data[i].addr = 0;
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}
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}
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static int mlx4_en_prepare_rx_desc(struct mlx4_en_priv *priv,
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struct mlx4_en_rx_ring *ring, int index)
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{
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struct mlx4_en_rx_desc *rx_desc = ring->buf + (index * ring->stride);
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struct skb_frag_struct *skb_frags = ring->rx_info +
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(index << priv->log_rx_info);
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int i;
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for (i = 0; i < priv->num_frags; i++)
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if (mlx4_en_alloc_frag(priv, rx_desc, skb_frags, ring->page_alloc, i))
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goto err;
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return 0;
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err:
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while (i--)
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put_page(skb_frags[i].page);
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return -ENOMEM;
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}
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static inline void mlx4_en_update_rx_prod_db(struct mlx4_en_rx_ring *ring)
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{
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*ring->wqres.db.db = cpu_to_be32(ring->prod & 0xffff);
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}
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static void mlx4_en_free_rx_desc(struct mlx4_en_priv *priv,
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struct mlx4_en_rx_ring *ring,
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int index)
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{
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struct mlx4_en_dev *mdev = priv->mdev;
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struct skb_frag_struct *skb_frags;
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struct mlx4_en_rx_desc *rx_desc = ring->buf + (index << ring->log_stride);
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dma_addr_t dma;
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int nr;
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skb_frags = ring->rx_info + (index << priv->log_rx_info);
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for (nr = 0; nr < priv->num_frags; nr++) {
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en_dbg(DRV, priv, "Freeing fragment:%d\n", nr);
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dma = be64_to_cpu(rx_desc->data[nr].addr);
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en_dbg(DRV, priv, "Unmapping buffer at dma:0x%llx\n", (u64) dma);
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pci_unmap_single(mdev->pdev, dma, skb_frags[nr].size,
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PCI_DMA_FROMDEVICE);
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put_page(skb_frags[nr].page);
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}
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}
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static int mlx4_en_fill_rx_buffers(struct mlx4_en_priv *priv)
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{
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struct mlx4_en_rx_ring *ring;
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int ring_ind;
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int buf_ind;
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int new_size;
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for (buf_ind = 0; buf_ind < priv->prof->rx_ring_size; buf_ind++) {
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for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++) {
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ring = &priv->rx_ring[ring_ind];
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if (mlx4_en_prepare_rx_desc(priv, ring,
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ring->actual_size)) {
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if (ring->actual_size < MLX4_EN_MIN_RX_SIZE) {
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en_err(priv, "Failed to allocate "
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"enough rx buffers\n");
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return -ENOMEM;
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} else {
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new_size = rounddown_pow_of_two(ring->actual_size);
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en_warn(priv, "Only %d buffers allocated "
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"reducing ring size to %d",
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ring->actual_size, new_size);
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goto reduce_rings;
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}
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}
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ring->actual_size++;
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ring->prod++;
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}
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}
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return 0;
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reduce_rings:
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for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++) {
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ring = &priv->rx_ring[ring_ind];
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while (ring->actual_size > new_size) {
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ring->actual_size--;
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ring->prod--;
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mlx4_en_free_rx_desc(priv, ring, ring->actual_size);
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}
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ring->size_mask = ring->actual_size - 1;
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}
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return 0;
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}
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static void mlx4_en_free_rx_buf(struct mlx4_en_priv *priv,
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struct mlx4_en_rx_ring *ring)
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{
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int index;
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en_dbg(DRV, priv, "Freeing Rx buf - cons:%d prod:%d\n",
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ring->cons, ring->prod);
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/* Unmap and free Rx buffers */
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BUG_ON((u32) (ring->prod - ring->cons) > ring->actual_size);
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while (ring->cons != ring->prod) {
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index = ring->cons & ring->size_mask;
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en_dbg(DRV, priv, "Processing descriptor:%d\n", index);
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mlx4_en_free_rx_desc(priv, ring, index);
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++ring->cons;
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}
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}
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int mlx4_en_create_rx_ring(struct mlx4_en_priv *priv,
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struct mlx4_en_rx_ring *ring, u32 size, u16 stride)
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{
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struct mlx4_en_dev *mdev = priv->mdev;
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int err;
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int tmp;
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ring->prod = 0;
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ring->cons = 0;
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ring->size = size;
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ring->size_mask = size - 1;
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ring->stride = stride;
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ring->log_stride = ffs(ring->stride) - 1;
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ring->buf_size = ring->size * ring->stride + TXBB_SIZE;
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tmp = size * roundup_pow_of_two(MLX4_EN_MAX_RX_FRAGS *
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sizeof(struct skb_frag_struct));
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ring->rx_info = vmalloc(tmp);
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if (!ring->rx_info) {
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en_err(priv, "Failed allocating rx_info ring\n");
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return -ENOMEM;
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}
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en_dbg(DRV, priv, "Allocated rx_info ring at addr:%p size:%d\n",
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ring->rx_info, tmp);
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err = mlx4_alloc_hwq_res(mdev->dev, &ring->wqres,
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ring->buf_size, 2 * PAGE_SIZE);
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if (err)
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goto err_ring;
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err = mlx4_en_map_buffer(&ring->wqres.buf);
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if (err) {
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en_err(priv, "Failed to map RX buffer\n");
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goto err_hwq;
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}
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ring->buf = ring->wqres.buf.direct.buf;
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/* Configure lro mngr */
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memset(&ring->lro, 0, sizeof(struct net_lro_mgr));
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ring->lro.dev = priv->dev;
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ring->lro.features = LRO_F_NAPI;
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ring->lro.frag_align_pad = NET_IP_ALIGN;
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ring->lro.ip_summed = CHECKSUM_UNNECESSARY;
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ring->lro.ip_summed_aggr = CHECKSUM_UNNECESSARY;
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ring->lro.max_desc = mdev->profile.num_lro;
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ring->lro.max_aggr = MAX_SKB_FRAGS;
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ring->lro.lro_arr = kzalloc(mdev->profile.num_lro *
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sizeof(struct net_lro_desc),
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GFP_KERNEL);
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if (!ring->lro.lro_arr) {
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en_err(priv, "Failed to allocate lro array\n");
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goto err_map;
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}
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ring->lro.get_frag_header = mlx4_en_get_frag_header;
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return 0;
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err_map:
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mlx4_en_unmap_buffer(&ring->wqres.buf);
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err_hwq:
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mlx4_free_hwq_res(mdev->dev, &ring->wqres, ring->buf_size);
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err_ring:
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vfree(ring->rx_info);
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ring->rx_info = NULL;
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return err;
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}
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int mlx4_en_activate_rx_rings(struct mlx4_en_priv *priv)
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{
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struct mlx4_en_rx_ring *ring;
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int i;
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int ring_ind;
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int err;
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int stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) +
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DS_SIZE * priv->num_frags);
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for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++) {
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ring = &priv->rx_ring[ring_ind];
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ring->prod = 0;
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ring->cons = 0;
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ring->actual_size = 0;
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ring->cqn = priv->rx_cq[ring_ind].mcq.cqn;
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ring->stride = stride;
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if (ring->stride <= TXBB_SIZE)
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ring->buf += TXBB_SIZE;
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ring->log_stride = ffs(ring->stride) - 1;
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ring->buf_size = ring->size * ring->stride;
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memset(ring->buf, 0, ring->buf_size);
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mlx4_en_update_rx_prod_db(ring);
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/* Initailize all descriptors */
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for (i = 0; i < ring->size; i++)
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mlx4_en_init_rx_desc(priv, ring, i);
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/* Initialize page allocators */
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err = mlx4_en_init_allocator(priv, ring);
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if (err) {
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en_err(priv, "Failed initializing ring allocator\n");
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ring_ind--;
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goto err_allocator;
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}
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}
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err = mlx4_en_fill_rx_buffers(priv);
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if (err)
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goto err_buffers;
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for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++) {
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ring = &priv->rx_ring[ring_ind];
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mlx4_en_update_rx_prod_db(ring);
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}
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return 0;
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err_buffers:
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for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++)
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mlx4_en_free_rx_buf(priv, &priv->rx_ring[ring_ind]);
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ring_ind = priv->rx_ring_num - 1;
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err_allocator:
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while (ring_ind >= 0) {
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mlx4_en_destroy_allocator(priv, &priv->rx_ring[ring_ind]);
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ring_ind--;
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}
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return err;
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}
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|
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void mlx4_en_destroy_rx_ring(struct mlx4_en_priv *priv,
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struct mlx4_en_rx_ring *ring)
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{
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struct mlx4_en_dev *mdev = priv->mdev;
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|
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kfree(ring->lro.lro_arr);
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mlx4_en_unmap_buffer(&ring->wqres.buf);
|
|
mlx4_free_hwq_res(mdev->dev, &ring->wqres, ring->buf_size + TXBB_SIZE);
|
|
vfree(ring->rx_info);
|
|
ring->rx_info = NULL;
|
|
}
|
|
|
|
void mlx4_en_deactivate_rx_ring(struct mlx4_en_priv *priv,
|
|
struct mlx4_en_rx_ring *ring)
|
|
{
|
|
mlx4_en_free_rx_buf(priv, ring);
|
|
if (ring->stride <= TXBB_SIZE)
|
|
ring->buf -= TXBB_SIZE;
|
|
mlx4_en_destroy_allocator(priv, ring);
|
|
}
|
|
|
|
|
|
/* Unmap a completed descriptor and free unused pages */
|
|
static int mlx4_en_complete_rx_desc(struct mlx4_en_priv *priv,
|
|
struct mlx4_en_rx_desc *rx_desc,
|
|
struct skb_frag_struct *skb_frags,
|
|
struct skb_frag_struct *skb_frags_rx,
|
|
struct mlx4_en_rx_alloc *page_alloc,
|
|
int length)
|
|
{
|
|
struct mlx4_en_dev *mdev = priv->mdev;
|
|
struct mlx4_en_frag_info *frag_info;
|
|
int nr;
|
|
dma_addr_t dma;
|
|
|
|
/* Collect used fragments while replacing them in the HW descirptors */
|
|
for (nr = 0; nr < priv->num_frags; nr++) {
|
|
frag_info = &priv->frag_info[nr];
|
|
if (length <= frag_info->frag_prefix_size)
|
|
break;
|
|
|
|
/* Save page reference in skb */
|
|
skb_frags_rx[nr].page = skb_frags[nr].page;
|
|
skb_frags_rx[nr].size = skb_frags[nr].size;
|
|
skb_frags_rx[nr].page_offset = skb_frags[nr].page_offset;
|
|
dma = be64_to_cpu(rx_desc->data[nr].addr);
|
|
|
|
/* Allocate a replacement page */
|
|
if (mlx4_en_alloc_frag(priv, rx_desc, skb_frags, page_alloc, nr))
|
|
goto fail;
|
|
|
|
/* Unmap buffer */
|
|
pci_unmap_single(mdev->pdev, dma, skb_frags[nr].size,
|
|
PCI_DMA_FROMDEVICE);
|
|
}
|
|
/* Adjust size of last fragment to match actual length */
|
|
if (nr > 0)
|
|
skb_frags_rx[nr - 1].size = length -
|
|
priv->frag_info[nr - 1].frag_prefix_size;
|
|
return nr;
|
|
|
|
fail:
|
|
/* Drop all accumulated fragments (which have already been replaced in
|
|
* the descriptor) of this packet; remaining fragments are reused... */
|
|
while (nr > 0) {
|
|
nr--;
|
|
put_page(skb_frags_rx[nr].page);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
static struct sk_buff *mlx4_en_rx_skb(struct mlx4_en_priv *priv,
|
|
struct mlx4_en_rx_desc *rx_desc,
|
|
struct skb_frag_struct *skb_frags,
|
|
struct mlx4_en_rx_alloc *page_alloc,
|
|
unsigned int length)
|
|
{
|
|
struct mlx4_en_dev *mdev = priv->mdev;
|
|
struct sk_buff *skb;
|
|
void *va;
|
|
int used_frags;
|
|
dma_addr_t dma;
|
|
|
|
skb = dev_alloc_skb(SMALL_PACKET_SIZE + NET_IP_ALIGN);
|
|
if (!skb) {
|
|
en_dbg(RX_ERR, priv, "Failed allocating skb\n");
|
|
return NULL;
|
|
}
|
|
skb->dev = priv->dev;
|
|
skb_reserve(skb, NET_IP_ALIGN);
|
|
skb->len = length;
|
|
skb->truesize = length + sizeof(struct sk_buff);
|
|
|
|
/* Get pointer to first fragment so we could copy the headers into the
|
|
* (linear part of the) skb */
|
|
va = page_address(skb_frags[0].page) + skb_frags[0].page_offset;
|
|
|
|
if (length <= SMALL_PACKET_SIZE) {
|
|
/* We are copying all relevant data to the skb - temporarily
|
|
* synch buffers for the copy */
|
|
dma = be64_to_cpu(rx_desc->data[0].addr);
|
|
dma_sync_single_for_cpu(&mdev->pdev->dev, dma, length,
|
|
DMA_FROM_DEVICE);
|
|
skb_copy_to_linear_data(skb, va, length);
|
|
dma_sync_single_for_device(&mdev->pdev->dev, dma, length,
|
|
DMA_FROM_DEVICE);
|
|
skb->tail += length;
|
|
} else {
|
|
|
|
/* Move relevant fragments to skb */
|
|
used_frags = mlx4_en_complete_rx_desc(priv, rx_desc, skb_frags,
|
|
skb_shinfo(skb)->frags,
|
|
page_alloc, length);
|
|
if (unlikely(!used_frags)) {
|
|
kfree_skb(skb);
|
|
return NULL;
|
|
}
|
|
skb_shinfo(skb)->nr_frags = used_frags;
|
|
|
|
/* Copy headers into the skb linear buffer */
|
|
memcpy(skb->data, va, HEADER_COPY_SIZE);
|
|
skb->tail += HEADER_COPY_SIZE;
|
|
|
|
/* Skip headers in first fragment */
|
|
skb_shinfo(skb)->frags[0].page_offset += HEADER_COPY_SIZE;
|
|
|
|
/* Adjust size of first fragment */
|
|
skb_shinfo(skb)->frags[0].size -= HEADER_COPY_SIZE;
|
|
skb->data_len = length - HEADER_COPY_SIZE;
|
|
}
|
|
return skb;
|
|
}
|
|
|
|
|
|
int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int budget)
|
|
{
|
|
struct mlx4_en_priv *priv = netdev_priv(dev);
|
|
struct mlx4_cqe *cqe;
|
|
struct mlx4_en_rx_ring *ring = &priv->rx_ring[cq->ring];
|
|
struct skb_frag_struct *skb_frags;
|
|
struct skb_frag_struct lro_frags[MLX4_EN_MAX_RX_FRAGS];
|
|
struct mlx4_en_rx_desc *rx_desc;
|
|
struct sk_buff *skb;
|
|
int index;
|
|
int nr;
|
|
unsigned int length;
|
|
int polled = 0;
|
|
int ip_summed;
|
|
|
|
if (!priv->port_up)
|
|
return 0;
|
|
|
|
/* We assume a 1:1 mapping between CQEs and Rx descriptors, so Rx
|
|
* descriptor offset can be deduced from the CQE index instead of
|
|
* reading 'cqe->index' */
|
|
index = cq->mcq.cons_index & ring->size_mask;
|
|
cqe = &cq->buf[index];
|
|
|
|
/* Process all completed CQEs */
|
|
while (XNOR(cqe->owner_sr_opcode & MLX4_CQE_OWNER_MASK,
|
|
cq->mcq.cons_index & cq->size)) {
|
|
|
|
skb_frags = ring->rx_info + (index << priv->log_rx_info);
|
|
rx_desc = ring->buf + (index << ring->log_stride);
|
|
|
|
/*
|
|
* make sure we read the CQE after we read the ownership bit
|
|
*/
|
|
rmb();
|
|
|
|
/* Drop packet on bad receive or bad checksum */
|
|
if (unlikely((cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) ==
|
|
MLX4_CQE_OPCODE_ERROR)) {
|
|
en_err(priv, "CQE completed in error - vendor "
|
|
"syndrom:%d syndrom:%d\n",
|
|
((struct mlx4_err_cqe *) cqe)->vendor_err_syndrome,
|
|
((struct mlx4_err_cqe *) cqe)->syndrome);
|
|
goto next;
|
|
}
|
|
if (unlikely(cqe->badfcs_enc & MLX4_CQE_BAD_FCS)) {
|
|
en_dbg(RX_ERR, priv, "Accepted frame with bad FCS\n");
|
|
goto next;
|
|
}
|
|
|
|
/*
|
|
* Packet is OK - process it.
|
|
*/
|
|
length = be32_to_cpu(cqe->byte_cnt);
|
|
ring->bytes += length;
|
|
ring->packets++;
|
|
|
|
if (likely(priv->rx_csum)) {
|
|
if ((cqe->status & cpu_to_be16(MLX4_CQE_STATUS_IPOK)) &&
|
|
(cqe->checksum == cpu_to_be16(0xffff))) {
|
|
priv->port_stats.rx_chksum_good++;
|
|
/* This packet is eligible for LRO if it is:
|
|
* - DIX Ethernet (type interpretation)
|
|
* - TCP/IP (v4)
|
|
* - without IP options
|
|
* - not an IP fragment */
|
|
if (mlx4_en_can_lro(cqe->status) &&
|
|
dev->features & NETIF_F_LRO) {
|
|
|
|
nr = mlx4_en_complete_rx_desc(
|
|
priv, rx_desc,
|
|
skb_frags, lro_frags,
|
|
ring->page_alloc, length);
|
|
if (!nr)
|
|
goto next;
|
|
|
|
if (priv->vlgrp && (cqe->vlan_my_qpn &
|
|
cpu_to_be32(MLX4_CQE_VLAN_PRESENT_MASK))) {
|
|
lro_vlan_hwaccel_receive_frags(
|
|
&ring->lro, lro_frags,
|
|
length, length,
|
|
priv->vlgrp,
|
|
be16_to_cpu(cqe->sl_vid),
|
|
NULL, 0);
|
|
} else
|
|
lro_receive_frags(&ring->lro,
|
|
lro_frags,
|
|
length,
|
|
length,
|
|
NULL, 0);
|
|
|
|
goto next;
|
|
}
|
|
|
|
/* LRO not possible, complete processing here */
|
|
ip_summed = CHECKSUM_UNNECESSARY;
|
|
INC_PERF_COUNTER(priv->pstats.lro_misses);
|
|
} else {
|
|
ip_summed = CHECKSUM_NONE;
|
|
priv->port_stats.rx_chksum_none++;
|
|
}
|
|
} else {
|
|
ip_summed = CHECKSUM_NONE;
|
|
priv->port_stats.rx_chksum_none++;
|
|
}
|
|
|
|
skb = mlx4_en_rx_skb(priv, rx_desc, skb_frags,
|
|
ring->page_alloc, length);
|
|
if (!skb) {
|
|
priv->stats.rx_dropped++;
|
|
goto next;
|
|
}
|
|
|
|
skb->ip_summed = ip_summed;
|
|
skb->protocol = eth_type_trans(skb, dev);
|
|
skb_record_rx_queue(skb, cq->ring);
|
|
|
|
/* Push it up the stack */
|
|
if (priv->vlgrp && (be32_to_cpu(cqe->vlan_my_qpn) &
|
|
MLX4_CQE_VLAN_PRESENT_MASK)) {
|
|
vlan_hwaccel_receive_skb(skb, priv->vlgrp,
|
|
be16_to_cpu(cqe->sl_vid));
|
|
} else
|
|
netif_receive_skb(skb);
|
|
|
|
next:
|
|
++cq->mcq.cons_index;
|
|
index = (cq->mcq.cons_index) & ring->size_mask;
|
|
cqe = &cq->buf[index];
|
|
if (++polled == budget) {
|
|
/* We are here because we reached the NAPI budget -
|
|
* flush only pending LRO sessions */
|
|
lro_flush_all(&ring->lro);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/* If CQ is empty flush all LRO sessions unconditionally */
|
|
lro_flush_all(&ring->lro);
|
|
|
|
out:
|
|
AVG_PERF_COUNTER(priv->pstats.rx_coal_avg, polled);
|
|
mlx4_cq_set_ci(&cq->mcq);
|
|
wmb(); /* ensure HW sees CQ consumer before we post new buffers */
|
|
ring->cons = cq->mcq.cons_index;
|
|
ring->prod += polled; /* Polled descriptors were realocated in place */
|
|
mlx4_en_update_rx_prod_db(ring);
|
|
return polled;
|
|
}
|
|
|
|
|
|
void mlx4_en_rx_irq(struct mlx4_cq *mcq)
|
|
{
|
|
struct mlx4_en_cq *cq = container_of(mcq, struct mlx4_en_cq, mcq);
|
|
struct mlx4_en_priv *priv = netdev_priv(cq->dev);
|
|
|
|
if (priv->port_up)
|
|
napi_schedule(&cq->napi);
|
|
else
|
|
mlx4_en_arm_cq(priv, cq);
|
|
}
|
|
|
|
/* Rx CQ polling - called by NAPI */
|
|
int mlx4_en_poll_rx_cq(struct napi_struct *napi, int budget)
|
|
{
|
|
struct mlx4_en_cq *cq = container_of(napi, struct mlx4_en_cq, napi);
|
|
struct net_device *dev = cq->dev;
|
|
struct mlx4_en_priv *priv = netdev_priv(dev);
|
|
int done;
|
|
|
|
done = mlx4_en_process_rx_cq(dev, cq, budget);
|
|
|
|
/* If we used up all the quota - we're probably not done yet... */
|
|
if (done == budget)
|
|
INC_PERF_COUNTER(priv->pstats.napi_quota);
|
|
else {
|
|
/* Done for now */
|
|
napi_complete(napi);
|
|
mlx4_en_arm_cq(priv, cq);
|
|
}
|
|
return done;
|
|
}
|
|
|
|
|
|
/* Calculate the last offset position that accomodates a full fragment
|
|
* (assuming fagment size = stride-align) */
|
|
static int mlx4_en_last_alloc_offset(struct mlx4_en_priv *priv, u16 stride, u16 align)
|
|
{
|
|
u16 res = MLX4_EN_ALLOC_SIZE % stride;
|
|
u16 offset = MLX4_EN_ALLOC_SIZE - stride - res + align;
|
|
|
|
en_dbg(DRV, priv, "Calculated last offset for stride:%d align:%d "
|
|
"res:%d offset:%d\n", stride, align, res, offset);
|
|
return offset;
|
|
}
|
|
|
|
|
|
static int frag_sizes[] = {
|
|
FRAG_SZ0,
|
|
FRAG_SZ1,
|
|
FRAG_SZ2,
|
|
FRAG_SZ3
|
|
};
|
|
|
|
void mlx4_en_calc_rx_buf(struct net_device *dev)
|
|
{
|
|
struct mlx4_en_priv *priv = netdev_priv(dev);
|
|
int eff_mtu = dev->mtu + ETH_HLEN + VLAN_HLEN + ETH_LLC_SNAP_SIZE;
|
|
int buf_size = 0;
|
|
int i = 0;
|
|
|
|
while (buf_size < eff_mtu) {
|
|
priv->frag_info[i].frag_size =
|
|
(eff_mtu > buf_size + frag_sizes[i]) ?
|
|
frag_sizes[i] : eff_mtu - buf_size;
|
|
priv->frag_info[i].frag_prefix_size = buf_size;
|
|
if (!i) {
|
|
priv->frag_info[i].frag_align = NET_IP_ALIGN;
|
|
priv->frag_info[i].frag_stride =
|
|
ALIGN(frag_sizes[i] + NET_IP_ALIGN, SMP_CACHE_BYTES);
|
|
} else {
|
|
priv->frag_info[i].frag_align = 0;
|
|
priv->frag_info[i].frag_stride =
|
|
ALIGN(frag_sizes[i], SMP_CACHE_BYTES);
|
|
}
|
|
priv->frag_info[i].last_offset = mlx4_en_last_alloc_offset(
|
|
priv, priv->frag_info[i].frag_stride,
|
|
priv->frag_info[i].frag_align);
|
|
buf_size += priv->frag_info[i].frag_size;
|
|
i++;
|
|
}
|
|
|
|
priv->num_frags = i;
|
|
priv->rx_skb_size = eff_mtu;
|
|
priv->log_rx_info = ROUNDUP_LOG2(i * sizeof(struct skb_frag_struct));
|
|
|
|
en_dbg(DRV, priv, "Rx buffer scatter-list (effective-mtu:%d "
|
|
"num_frags:%d):\n", eff_mtu, priv->num_frags);
|
|
for (i = 0; i < priv->num_frags; i++) {
|
|
en_dbg(DRV, priv, " frag:%d - size:%d prefix:%d align:%d "
|
|
"stride:%d last_offset:%d\n", i,
|
|
priv->frag_info[i].frag_size,
|
|
priv->frag_info[i].frag_prefix_size,
|
|
priv->frag_info[i].frag_align,
|
|
priv->frag_info[i].frag_stride,
|
|
priv->frag_info[i].last_offset);
|
|
}
|
|
}
|
|
|
|
/* RSS related functions */
|
|
|
|
static int mlx4_en_config_rss_qp(struct mlx4_en_priv *priv, int qpn,
|
|
struct mlx4_en_rx_ring *ring,
|
|
enum mlx4_qp_state *state,
|
|
struct mlx4_qp *qp)
|
|
{
|
|
struct mlx4_en_dev *mdev = priv->mdev;
|
|
struct mlx4_qp_context *context;
|
|
int err = 0;
|
|
|
|
context = kmalloc(sizeof *context , GFP_KERNEL);
|
|
if (!context) {
|
|
en_err(priv, "Failed to allocate qp context\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
err = mlx4_qp_alloc(mdev->dev, qpn, qp);
|
|
if (err) {
|
|
en_err(priv, "Failed to allocate qp #%x\n", qpn);
|
|
goto out;
|
|
}
|
|
qp->event = mlx4_en_sqp_event;
|
|
|
|
memset(context, 0, sizeof *context);
|
|
mlx4_en_fill_qp_context(priv, ring->size, ring->stride, 0, 0,
|
|
qpn, ring->cqn, context);
|
|
context->db_rec_addr = cpu_to_be64(ring->wqres.db.dma);
|
|
|
|
err = mlx4_qp_to_ready(mdev->dev, &ring->wqres.mtt, context, qp, state);
|
|
if (err) {
|
|
mlx4_qp_remove(mdev->dev, qp);
|
|
mlx4_qp_free(mdev->dev, qp);
|
|
}
|
|
mlx4_en_update_rx_prod_db(ring);
|
|
out:
|
|
kfree(context);
|
|
return err;
|
|
}
|
|
|
|
/* Allocate rx qp's and configure them according to rss map */
|
|
int mlx4_en_config_rss_steer(struct mlx4_en_priv *priv)
|
|
{
|
|
struct mlx4_en_dev *mdev = priv->mdev;
|
|
struct mlx4_en_rss_map *rss_map = &priv->rss_map;
|
|
struct mlx4_qp_context context;
|
|
struct mlx4_en_rss_context *rss_context;
|
|
void *ptr;
|
|
int rss_xor = mdev->profile.rss_xor;
|
|
u8 rss_mask = mdev->profile.rss_mask;
|
|
int i, qpn;
|
|
int err = 0;
|
|
int good_qps = 0;
|
|
|
|
en_dbg(DRV, priv, "Configuring rss steering\n");
|
|
err = mlx4_qp_reserve_range(mdev->dev, priv->rx_ring_num,
|
|
priv->rx_ring_num,
|
|
&rss_map->base_qpn);
|
|
if (err) {
|
|
en_err(priv, "Failed reserving %d qps\n", priv->rx_ring_num);
|
|
return err;
|
|
}
|
|
|
|
for (i = 0; i < priv->rx_ring_num; i++) {
|
|
qpn = rss_map->base_qpn + i;
|
|
err = mlx4_en_config_rss_qp(priv, qpn, &priv->rx_ring[i],
|
|
&rss_map->state[i],
|
|
&rss_map->qps[i]);
|
|
if (err)
|
|
goto rss_err;
|
|
|
|
++good_qps;
|
|
}
|
|
|
|
/* Configure RSS indirection qp */
|
|
err = mlx4_qp_reserve_range(mdev->dev, 1, 1, &priv->base_qpn);
|
|
if (err) {
|
|
en_err(priv, "Failed to reserve range for RSS "
|
|
"indirection qp\n");
|
|
goto rss_err;
|
|
}
|
|
err = mlx4_qp_alloc(mdev->dev, priv->base_qpn, &rss_map->indir_qp);
|
|
if (err) {
|
|
en_err(priv, "Failed to allocate RSS indirection QP\n");
|
|
goto reserve_err;
|
|
}
|
|
rss_map->indir_qp.event = mlx4_en_sqp_event;
|
|
mlx4_en_fill_qp_context(priv, 0, 0, 0, 1, priv->base_qpn,
|
|
priv->rx_ring[0].cqn, &context);
|
|
|
|
ptr = ((void *) &context) + 0x3c;
|
|
rss_context = (struct mlx4_en_rss_context *) ptr;
|
|
rss_context->base_qpn = cpu_to_be32(ilog2(priv->rx_ring_num) << 24 |
|
|
(rss_map->base_qpn));
|
|
rss_context->default_qpn = cpu_to_be32(rss_map->base_qpn);
|
|
rss_context->hash_fn = rss_xor & 0x3;
|
|
rss_context->flags = rss_mask << 2;
|
|
|
|
err = mlx4_qp_to_ready(mdev->dev, &priv->res.mtt, &context,
|
|
&rss_map->indir_qp, &rss_map->indir_state);
|
|
if (err)
|
|
goto indir_err;
|
|
|
|
return 0;
|
|
|
|
indir_err:
|
|
mlx4_qp_modify(mdev->dev, NULL, rss_map->indir_state,
|
|
MLX4_QP_STATE_RST, NULL, 0, 0, &rss_map->indir_qp);
|
|
mlx4_qp_remove(mdev->dev, &rss_map->indir_qp);
|
|
mlx4_qp_free(mdev->dev, &rss_map->indir_qp);
|
|
reserve_err:
|
|
mlx4_qp_release_range(mdev->dev, priv->base_qpn, 1);
|
|
rss_err:
|
|
for (i = 0; i < good_qps; i++) {
|
|
mlx4_qp_modify(mdev->dev, NULL, rss_map->state[i],
|
|
MLX4_QP_STATE_RST, NULL, 0, 0, &rss_map->qps[i]);
|
|
mlx4_qp_remove(mdev->dev, &rss_map->qps[i]);
|
|
mlx4_qp_free(mdev->dev, &rss_map->qps[i]);
|
|
}
|
|
mlx4_qp_release_range(mdev->dev, rss_map->base_qpn, priv->rx_ring_num);
|
|
return err;
|
|
}
|
|
|
|
void mlx4_en_release_rss_steer(struct mlx4_en_priv *priv)
|
|
{
|
|
struct mlx4_en_dev *mdev = priv->mdev;
|
|
struct mlx4_en_rss_map *rss_map = &priv->rss_map;
|
|
int i;
|
|
|
|
mlx4_qp_modify(mdev->dev, NULL, rss_map->indir_state,
|
|
MLX4_QP_STATE_RST, NULL, 0, 0, &rss_map->indir_qp);
|
|
mlx4_qp_remove(mdev->dev, &rss_map->indir_qp);
|
|
mlx4_qp_free(mdev->dev, &rss_map->indir_qp);
|
|
mlx4_qp_release_range(mdev->dev, priv->base_qpn, 1);
|
|
|
|
for (i = 0; i < priv->rx_ring_num; i++) {
|
|
mlx4_qp_modify(mdev->dev, NULL, rss_map->state[i],
|
|
MLX4_QP_STATE_RST, NULL, 0, 0, &rss_map->qps[i]);
|
|
mlx4_qp_remove(mdev->dev, &rss_map->qps[i]);
|
|
mlx4_qp_free(mdev->dev, &rss_map->qps[i]);
|
|
}
|
|
mlx4_qp_release_range(mdev->dev, rss_map->base_qpn, priv->rx_ring_num);
|
|
}
|
|
|
|
|
|
|
|
|
|
|