diff options
Diffstat (limited to 'drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c')
| -rw-r--r-- | drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c | 2654 |
1 files changed, 0 insertions, 2654 deletions
diff --git a/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c b/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c deleted file mode 100644 index 559154a5d9e9..000000000000 --- a/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c +++ /dev/null @@ -1,2654 +0,0 @@ -// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) -/* Copyright 2014-2016 Freescale Semiconductor Inc. - * Copyright 2016-2017 NXP - */ -#include <linux/init.h> -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/etherdevice.h> -#include <linux/of_net.h> -#include <linux/interrupt.h> -#include <linux/msi.h> -#include <linux/kthread.h> -#include <linux/iommu.h> -#include <linux/net_tstamp.h> -#include <linux/fsl/mc.h> - -#include <net/sock.h> - -#include "dpaa2-eth.h" - -/* CREATE_TRACE_POINTS only needs to be defined once. Other dpa files - * using trace events only need to #include <trace/events/sched.h> - */ -#define CREATE_TRACE_POINTS -#include "dpaa2-eth-trace.h" - -MODULE_LICENSE("Dual BSD/GPL"); -MODULE_AUTHOR("Freescale Semiconductor, Inc"); -MODULE_DESCRIPTION("Freescale DPAA2 Ethernet Driver"); - -static void *dpaa2_iova_to_virt(struct iommu_domain *domain, - dma_addr_t iova_addr) -{ - phys_addr_t phys_addr; - - phys_addr = domain ? iommu_iova_to_phys(domain, iova_addr) : iova_addr; - - return phys_to_virt(phys_addr); -} - -static void validate_rx_csum(struct dpaa2_eth_priv *priv, - u32 fd_status, - struct sk_buff *skb) -{ - skb_checksum_none_assert(skb); - - /* HW checksum validation is disabled, nothing to do here */ - if (!(priv->net_dev->features & NETIF_F_RXCSUM)) - return; - - /* Read checksum validation bits */ - if (!((fd_status & DPAA2_FAS_L3CV) && - (fd_status & DPAA2_FAS_L4CV))) - return; - - /* Inform the stack there's no need to compute L3/L4 csum anymore */ - skb->ip_summed = CHECKSUM_UNNECESSARY; -} - -/* Free a received FD. - * Not to be used for Tx conf FDs or on any other paths. - */ -static void free_rx_fd(struct dpaa2_eth_priv *priv, - const struct dpaa2_fd *fd, - void *vaddr) -{ - struct device *dev = priv->net_dev->dev.parent; - dma_addr_t addr = dpaa2_fd_get_addr(fd); - u8 fd_format = dpaa2_fd_get_format(fd); - struct dpaa2_sg_entry *sgt; - void *sg_vaddr; - int i; - - /* If single buffer frame, just free the data buffer */ - if (fd_format == dpaa2_fd_single) - goto free_buf; - else if (fd_format != dpaa2_fd_sg) - /* We don't support any other format */ - return; - - /* For S/G frames, we first need to free all SG entries - * except the first one, which was taken care of already - */ - sgt = vaddr + dpaa2_fd_get_offset(fd); - for (i = 1; i < DPAA2_ETH_MAX_SG_ENTRIES; i++) { - addr = dpaa2_sg_get_addr(&sgt[i]); - sg_vaddr = dpaa2_iova_to_virt(priv->iommu_domain, addr); - dma_unmap_single(dev, addr, DPAA2_ETH_RX_BUF_SIZE, - DMA_FROM_DEVICE); - - skb_free_frag(sg_vaddr); - if (dpaa2_sg_is_final(&sgt[i])) - break; - } - -free_buf: - skb_free_frag(vaddr); -} - -/* Build a linear skb based on a single-buffer frame descriptor */ -static struct sk_buff *build_linear_skb(struct dpaa2_eth_priv *priv, - struct dpaa2_eth_channel *ch, - const struct dpaa2_fd *fd, - void *fd_vaddr) -{ - struct sk_buff *skb = NULL; - u16 fd_offset = dpaa2_fd_get_offset(fd); - u32 fd_length = dpaa2_fd_get_len(fd); - - ch->buf_count--; - - skb = build_skb(fd_vaddr, DPAA2_ETH_SKB_SIZE); - if (unlikely(!skb)) - return NULL; - - skb_reserve(skb, fd_offset); - skb_put(skb, fd_length); - - return skb; -} - -/* Build a non linear (fragmented) skb based on a S/G table */ -static struct sk_buff *build_frag_skb(struct dpaa2_eth_priv *priv, - struct dpaa2_eth_channel *ch, - struct dpaa2_sg_entry *sgt) -{ - struct sk_buff *skb = NULL; - struct device *dev = priv->net_dev->dev.parent; - void *sg_vaddr; - dma_addr_t sg_addr; - u16 sg_offset; - u32 sg_length; - struct page *page, *head_page; - int page_offset; - int i; - - for (i = 0; i < DPAA2_ETH_MAX_SG_ENTRIES; i++) { - struct dpaa2_sg_entry *sge = &sgt[i]; - - /* NOTE: We only support SG entries in dpaa2_sg_single format, - * but this is the only format we may receive from HW anyway - */ - - /* Get the address and length from the S/G entry */ - sg_addr = dpaa2_sg_get_addr(sge); - sg_vaddr = dpaa2_iova_to_virt(priv->iommu_domain, sg_addr); - dma_unmap_single(dev, sg_addr, DPAA2_ETH_RX_BUF_SIZE, - DMA_FROM_DEVICE); - - sg_length = dpaa2_sg_get_len(sge); - - if (i == 0) { - /* We build the skb around the first data buffer */ - skb = build_skb(sg_vaddr, DPAA2_ETH_SKB_SIZE); - if (unlikely(!skb)) { - /* Free the first SG entry now, since we already - * unmapped it and obtained the virtual address - */ - skb_free_frag(sg_vaddr); - - /* We still need to subtract the buffers used - * by this FD from our software counter - */ - while (!dpaa2_sg_is_final(&sgt[i]) && - i < DPAA2_ETH_MAX_SG_ENTRIES) - i++; - break; - } - - sg_offset = dpaa2_sg_get_offset(sge); - skb_reserve(skb, sg_offset); - skb_put(skb, sg_length); - } else { - /* Rest of the data buffers are stored as skb frags */ - page = virt_to_page(sg_vaddr); - head_page = virt_to_head_page(sg_vaddr); - - /* Offset in page (which may be compound). - * Data in subsequent SG entries is stored from the - * beginning of the buffer, so we don't need to add the - * sg_offset. - */ - page_offset = ((unsigned long)sg_vaddr & - (PAGE_SIZE - 1)) + - (page_address(page) - page_address(head_page)); - - skb_add_rx_frag(skb, i - 1, head_page, page_offset, - sg_length, DPAA2_ETH_RX_BUF_SIZE); - } - - if (dpaa2_sg_is_final(sge)) - break; - } - - WARN_ONCE(i == DPAA2_ETH_MAX_SG_ENTRIES, "Final bit not set in SGT"); - - /* Count all data buffers + SG table buffer */ - ch->buf_count -= i + 2; - - return skb; -} - -/* Main Rx frame processing routine */ -static void dpaa2_eth_rx(struct dpaa2_eth_priv *priv, - struct dpaa2_eth_channel *ch, - const struct dpaa2_fd *fd, - struct napi_struct *napi, - u16 queue_id) -{ - dma_addr_t addr = dpaa2_fd_get_addr(fd); - u8 fd_format = dpaa2_fd_get_format(fd); - void *vaddr; - struct sk_buff *skb; - struct rtnl_link_stats64 *percpu_stats; - struct dpaa2_eth_drv_stats *percpu_extras; - struct device *dev = priv->net_dev->dev.parent; - struct dpaa2_fas *fas; - void *buf_data; - u32 status = 0; - - /* Tracing point */ - trace_dpaa2_rx_fd(priv->net_dev, fd); - - vaddr = dpaa2_iova_to_virt(priv->iommu_domain, addr); - dma_unmap_single(dev, addr, DPAA2_ETH_RX_BUF_SIZE, DMA_FROM_DEVICE); - - fas = dpaa2_get_fas(vaddr, false); - prefetch(fas); - buf_data = vaddr + dpaa2_fd_get_offset(fd); - prefetch(buf_data); - - percpu_stats = this_cpu_ptr(priv->percpu_stats); - percpu_extras = this_cpu_ptr(priv->percpu_extras); - - if (fd_format == dpaa2_fd_single) { - skb = build_linear_skb(priv, ch, fd, vaddr); - } else if (fd_format == dpaa2_fd_sg) { - skb = build_frag_skb(priv, ch, buf_data); - skb_free_frag(vaddr); - percpu_extras->rx_sg_frames++; - percpu_extras->rx_sg_bytes += dpaa2_fd_get_len(fd); - } else { - /* We don't support any other format */ - goto err_frame_format; - } - - if (unlikely(!skb)) - goto err_build_skb; - - prefetch(skb->data); - - /* Get the timestamp value */ - if (priv->rx_tstamp) { - struct skb_shared_hwtstamps *shhwtstamps = skb_hwtstamps(skb); - __le64 *ts = dpaa2_get_ts(vaddr, false); - u64 ns; - - memset(shhwtstamps, 0, sizeof(*shhwtstamps)); - - ns = DPAA2_PTP_CLK_PERIOD_NS * le64_to_cpup(ts); - shhwtstamps->hwtstamp = ns_to_ktime(ns); - } - - /* Check if we need to validate the L4 csum */ - if (likely(dpaa2_fd_get_frc(fd) & DPAA2_FD_FRC_FASV)) { - status = le32_to_cpu(fas->status); - validate_rx_csum(priv, status, skb); - } - - skb->protocol = eth_type_trans(skb, priv->net_dev); - skb_record_rx_queue(skb, queue_id); - - percpu_stats->rx_packets++; - percpu_stats->rx_bytes += dpaa2_fd_get_len(fd); - - napi_gro_receive(napi, skb); - - return; - -err_build_skb: - free_rx_fd(priv, fd, vaddr); -err_frame_format: - percpu_stats->rx_dropped++; -} - -/* Consume all frames pull-dequeued into the store. This is the simplest way to - * make sure we don't accidentally issue another volatile dequeue which would - * overwrite (leak) frames already in the store. - * - * Observance of NAPI budget is not our concern, leaving that to the caller. - */ -static int consume_frames(struct dpaa2_eth_channel *ch) -{ - struct dpaa2_eth_priv *priv = ch->priv; - struct dpaa2_eth_fq *fq; - struct dpaa2_dq *dq; - const struct dpaa2_fd *fd; - int cleaned = 0; - int is_last; - - do { - dq = dpaa2_io_store_next(ch->store, &is_last); - if (unlikely(!dq)) { - /* If we're here, we *must* have placed a - * volatile dequeue comnmand, so keep reading through - * the store until we get some sort of valid response - * token (either a valid frame or an "empty dequeue") - */ - continue; - } - - fd = dpaa2_dq_fd(dq); - fq = (struct dpaa2_eth_fq *)(uintptr_t)dpaa2_dq_fqd_ctx(dq); - fq->stats.frames++; - - fq->consume(priv, ch, fd, &ch->napi, fq->flowid); - cleaned++; - } while (!is_last); - - return cleaned; -} - -/* Configure the egress frame annotation for timestamp update */ -static void enable_tx_tstamp(struct dpaa2_fd *fd, void *buf_start) -{ - struct dpaa2_faead *faead; - u32 ctrl, frc; - - /* Mark the egress frame annotation area as valid */ - frc = dpaa2_fd_get_frc(fd); - dpaa2_fd_set_frc(fd, frc | DPAA2_FD_FRC_FAEADV); - - /* Set hardware annotation size */ - ctrl = dpaa2_fd_get_ctrl(fd); - dpaa2_fd_set_ctrl(fd, ctrl | DPAA2_FD_CTRL_ASAL); - - /* enable UPD (update prepanded data) bit in FAEAD field of - * hardware frame annotation area - */ - ctrl = DPAA2_FAEAD_A2V | DPAA2_FAEAD_UPDV | DPAA2_FAEAD_UPD; - faead = dpaa2_get_faead(buf_start, true); - faead->ctrl = cpu_to_le32(ctrl); -} - -/* Create a frame descriptor based on a fragmented skb */ -static int build_sg_fd(struct dpaa2_eth_priv *priv, - struct sk_buff *skb, - struct dpaa2_fd *fd) -{ - struct device *dev = priv->net_dev->dev.parent; - void *sgt_buf = NULL; - dma_addr_t addr; - int nr_frags = skb_shinfo(skb)->nr_frags; - struct dpaa2_sg_entry *sgt; - int i, err; - int sgt_buf_size; - struct scatterlist *scl, *crt_scl; - int num_sg; - int num_dma_bufs; - struct dpaa2_eth_swa *swa; - - /* Create and map scatterlist. - * We don't advertise NETIF_F_FRAGLIST, so skb_to_sgvec() will not have - * to go beyond nr_frags+1. - * Note: We don't support chained scatterlists - */ - if (unlikely(PAGE_SIZE / sizeof(struct scatterlist) < nr_frags + 1)) - return -EINVAL; - - scl = kcalloc(nr_frags + 1, sizeof(struct scatterlist), GFP_ATOMIC); - if (unlikely(!scl)) - return -ENOMEM; - - sg_init_table(scl, nr_frags + 1); - num_sg = skb_to_sgvec(skb, scl, 0, skb->len); - num_dma_bufs = dma_map_sg(dev, scl, num_sg, DMA_BIDIRECTIONAL); - if (unlikely(!num_dma_bufs)) { - err = -ENOMEM; - goto dma_map_sg_failed; - } - - /* Prepare the HW SGT structure */ - sgt_buf_size = priv->tx_data_offset + - sizeof(struct dpaa2_sg_entry) * num_dma_bufs; - sgt_buf = netdev_alloc_frag(sgt_buf_size + DPAA2_ETH_TX_BUF_ALIGN); - if (unlikely(!sgt_buf)) { - err = -ENOMEM; - goto sgt_buf_alloc_failed; - } - sgt_buf = PTR_ALIGN(sgt_buf, DPAA2_ETH_TX_BUF_ALIGN); - memset(sgt_buf, 0, sgt_buf_size); - - sgt = (struct dpaa2_sg_entry *)(sgt_buf + priv->tx_data_offset); - - /* Fill in the HW SGT structure. - * - * sgt_buf is zeroed out, so the following fields are implicit - * in all sgt entries: - * - offset is 0 - * - format is 'dpaa2_sg_single' - */ - for_each_sg(scl, crt_scl, num_dma_bufs, i) { - dpaa2_sg_set_addr(&sgt[i], sg_dma_address(crt_scl)); - dpaa2_sg_set_len(&sgt[i], sg_dma_len(crt_scl)); - } - dpaa2_sg_set_final(&sgt[i - 1], true); - - /* Store the skb backpointer in the SGT buffer. - * Fit the scatterlist and the number of buffers alongside the - * skb backpointer in the software annotation area. We'll need - * all of them on Tx Conf. - */ - swa = (struct dpaa2_eth_swa *)sgt_buf; - swa->skb = skb; - swa->scl = scl; - swa->num_sg = num_sg; - swa->sgt_size = sgt_buf_size; - - /* Separately map the SGT buffer */ - addr = dma_map_single(dev, sgt_buf, sgt_buf_size, DMA_BIDIRECTIONAL); - if (unlikely(dma_mapping_error(dev, addr))) { - err = -ENOMEM; - goto dma_map_single_failed; - } - dpaa2_fd_set_offset(fd, priv->tx_data_offset); - dpaa2_fd_set_format(fd, dpaa2_fd_sg); - dpaa2_fd_set_addr(fd, addr); - dpaa2_fd_set_len(fd, skb->len); - dpaa2_fd_set_ctrl(fd, FD_CTRL_PTA | FD_CTRL_PTV1); - - if (priv->tx_tstamp && skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) - enable_tx_tstamp(fd, sgt_buf); - - return 0; - -dma_map_single_failed: - skb_free_frag(sgt_buf); -sgt_buf_alloc_failed: - dma_unmap_sg(dev, scl, num_sg, DMA_BIDIRECTIONAL); -dma_map_sg_failed: - kfree(scl); - return err; -} - -/* Create a frame descriptor based on a linear skb */ -static int build_single_fd(struct dpaa2_eth_priv *priv, - struct sk_buff *skb, - struct dpaa2_fd *fd) -{ - struct device *dev = priv->net_dev->dev.parent; - u8 *buffer_start, *aligned_start; - struct sk_buff **skbh; - dma_addr_t addr; - - buffer_start = skb->data - dpaa2_eth_needed_headroom(priv, skb); - - /* If there's enough room to align the FD address, do it. - * It will help hardware optimize accesses. - */ - aligned_start = PTR_ALIGN(buffer_start - DPAA2_ETH_TX_BUF_ALIGN, - DPAA2_ETH_TX_BUF_ALIGN); - if (aligned_start >= skb->head) - buffer_start = aligned_start; - - /* Store a backpointer to the skb at the beginning of the buffer - * (in the private data area) such that we can release it - * on Tx confirm - */ - skbh = (struct sk_buff **)buffer_start; - *skbh = skb; - - addr = dma_map_single(dev, buffer_start, - skb_tail_pointer(skb) - buffer_start, - DMA_BIDIRECTIONAL); - if (unlikely(dma_mapping_error(dev, addr))) - return -ENOMEM; - - dpaa2_fd_set_addr(fd, addr); - dpaa2_fd_set_offset(fd, (u16)(skb->data - buffer_start)); - dpaa2_fd_set_len(fd, skb->len); - dpaa2_fd_set_format(fd, dpaa2_fd_single); - dpaa2_fd_set_ctrl(fd, FD_CTRL_PTA | FD_CTRL_PTV1); - - if (priv->tx_tstamp && skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) - enable_tx_tstamp(fd, buffer_start); - - return 0; -} - -/* FD freeing routine on the Tx path - * - * DMA-unmap and free FD and possibly SGT buffer allocated on Tx. The skb - * back-pointed to is also freed. - * This can be called either from dpaa2_eth_tx_conf() or on the error path of - * dpaa2_eth_tx(). - */ -static void free_tx_fd(const struct dpaa2_eth_priv *priv, - const struct dpaa2_fd *fd) -{ - struct device *dev = priv->net_dev->dev.parent; - dma_addr_t fd_addr; - struct sk_buff **skbh, *skb; - unsigned char *buffer_start; - struct dpaa2_eth_swa *swa; - u8 fd_format = dpaa2_fd_get_format(fd); - - fd_addr = dpaa2_fd_get_addr(fd); - skbh = dpaa2_iova_to_virt(priv->iommu_domain, fd_addr); - - if (fd_format == dpaa2_fd_single) { - skb = *skbh; - buffer_start = (unsigned char *)skbh; - /* Accessing the skb buffer is safe before dma unmap, because - * we didn't map the actual skb shell. - */ - dma_unmap_single(dev, fd_addr, - skb_tail_pointer(skb) - buffer_start, - DMA_BIDIRECTIONAL); - } else if (fd_format == dpaa2_fd_sg) { - swa = (struct dpaa2_eth_swa *)skbh; - skb = swa->skb; - - /* Unmap the scatterlist */ - dma_unmap_sg(dev, swa->scl, swa->num_sg, DMA_BIDIRECTIONAL); - kfree(swa->scl); - - /* Unmap the SGT buffer */ - dma_unmap_single(dev, fd_addr, swa->sgt_size, - DMA_BIDIRECTIONAL); - } else { - netdev_dbg(priv->net_dev, "Invalid FD format\n"); - return; - } - - /* Get the timestamp value */ - if (priv->tx_tstamp && skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) { - struct skb_shared_hwtstamps shhwtstamps; - __le64 *ts = dpaa2_get_ts(skbh, true); - u64 ns; - - memset(&shhwtstamps, 0, sizeof(shhwtstamps)); - - ns = DPAA2_PTP_CLK_PERIOD_NS * le64_to_cpup(ts); - shhwtstamps.hwtstamp = ns_to_ktime(ns); - skb_tstamp_tx(skb, &shhwtstamps); - } - - /* Free SGT buffer allocated on tx */ - if (fd_format != dpaa2_fd_single) - skb_free_frag(skbh); - - /* Move on with skb release */ - dev_kfree_skb(skb); -} - -static netdev_tx_t dpaa2_eth_tx(struct sk_buff *skb, struct net_device *net_dev) -{ - struct dpaa2_eth_priv *priv = netdev_priv(net_dev); - struct dpaa2_fd fd; - struct rtnl_link_stats64 *percpu_stats; - struct dpaa2_eth_drv_stats *percpu_extras; - struct dpaa2_eth_fq *fq; - u16 queue_mapping; - unsigned int needed_headroom; - int err, i; - - percpu_stats = this_cpu_ptr(priv->percpu_stats); - percpu_extras = this_cpu_ptr(priv->percpu_extras); - - needed_headroom = dpaa2_eth_needed_headroom(priv, skb); - if (skb_headroom(skb) < needed_headroom) { - struct sk_buff *ns; - - ns = skb_realloc_headroom(skb, needed_headroom); - if (unlikely(!ns)) { - percpu_stats->tx_dropped++; - goto err_alloc_headroom; - } - percpu_extras->tx_reallocs++; - - if (skb->sk) - skb_set_owner_w(ns, skb->sk); - - dev_kfree_skb(skb); - skb = ns; - } - - /* We'll be holding a back-reference to the skb until Tx Confirmation; - * we don't want that overwritten by a concurrent Tx with a cloned skb. - */ - skb = skb_unshare(skb, GFP_ATOMIC); - if (unlikely(!skb)) { - /* skb_unshare() has already freed the skb */ - percpu_stats->tx_dropped++; - return NETDEV_TX_OK; - } - - /* Setup the FD fields */ - memset(&fd, 0, sizeof(fd)); - - if (skb_is_nonlinear(skb)) { - err = build_sg_fd(priv, skb, &fd); - percpu_extras->tx_sg_frames++; - percpu_extras->tx_sg_bytes += skb->len; - } else { - err = build_single_fd(priv, skb, &fd); - } - - if (unlikely(err)) { - percpu_stats->tx_dropped++; - goto err_build_fd; - } - - /* Tracing point */ - trace_dpaa2_tx_fd(net_dev, &fd); - - /* TxConf FQ selection relies on queue id from the stack. - * In case of a forwarded frame from another DPNI interface, we choose - * a queue affined to the same core that processed the Rx frame - */ - queue_mapping = skb_get_queue_mapping(skb); - fq = &priv->fq[queue_mapping]; - for (i = 0; i < DPAA2_ETH_ENQUEUE_RETRIES; i++) { - err = dpaa2_io_service_enqueue_qd(fq->channel->dpio, - priv->tx_qdid, 0, - fq->tx_qdbin, &fd); - if (err != -EBUSY) - break; - } - percpu_extras->tx_portal_busy += i; - if (unlikely(err < 0)) { - percpu_stats->tx_errors++; - /* Clean up everything, including freeing the skb */ - free_tx_fd(priv, &fd); - } else { - percpu_stats->tx_packets++; - percpu_stats->tx_bytes += dpaa2_fd_get_len(&fd); - } - - return NETDEV_TX_OK; - -err_build_fd: -err_alloc_headroom: - dev_kfree_skb(skb); - - return NETDEV_TX_OK; -} - -/* Tx confirmation frame processing routine */ -static void dpaa2_eth_tx_conf(struct dpaa2_eth_priv *priv, - struct dpaa2_eth_channel *ch, - const struct dpaa2_fd *fd, - struct napi_struct *napi __always_unused, - u16 queue_id __always_unused) -{ - struct rtnl_link_stats64 *percpu_stats; - struct dpaa2_eth_drv_stats *percpu_extras; - u32 fd_errors; - - /* Tracing point */ - trace_dpaa2_tx_conf_fd(priv->net_dev, fd); - - percpu_extras = this_cpu_ptr(priv->percpu_extras); - percpu_extras->tx_conf_frames++; - percpu_extras->tx_conf_bytes += dpaa2_fd_get_len(fd); - - /* Check frame errors in the FD field */ - fd_errors = dpaa2_fd_get_ctrl(fd) & DPAA2_FD_TX_ERR_MASK; - free_tx_fd(priv, fd); - - if (likely(!fd_errors)) - return; - - if (net_ratelimit()) - netdev_dbg(priv->net_dev, "TX frame FD error: 0x%08x\n", - fd_errors); - - percpu_stats = this_cpu_ptr(priv->percpu_stats); - /* Tx-conf logically pertains to the egress path. */ - percpu_stats->tx_errors++; -} - -static int set_rx_csum(struct dpaa2_eth_priv *priv, bool enable) -{ - int err; - - err = dpni_set_offload(priv->mc_io, 0, priv->mc_token, - DPNI_OFF_RX_L3_CSUM, enable); - if (err) { - netdev_err(priv->net_dev, - "dpni_set_offload(RX_L3_CSUM) failed\n"); - return err; - } - - err = dpni_set_offload(priv->mc_io, 0, priv->mc_token, - DPNI_OFF_RX_L4_CSUM, enable); - if (err) { - netdev_err(priv->net_dev, - "dpni_set_offload(RX_L4_CSUM) failed\n"); - return err; - } - - return 0; -} - -static int set_tx_csum(struct dpaa2_eth_priv *priv, bool enable) -{ - int err; - - err = dpni_set_offload(priv->mc_io, 0, priv->mc_token, - DPNI_OFF_TX_L3_CSUM, enable); - if (err) { - netdev_err(priv->net_dev, "dpni_set_offload(TX_L3_CSUM) failed\n"); - return err; - } - - err = dpni_set_offload(priv->mc_io, 0, priv->mc_token, - DPNI_OFF_TX_L4_CSUM, enable); - if (err) { - netdev_err(priv->net_dev, "dpni_set_offload(TX_L4_CSUM) failed\n"); - return err; - } - - return 0; -} - -/* Free buffers acquired from the buffer pool or which were meant to - * be released in the pool - */ -static void free_bufs(struct dpaa2_eth_priv *priv, u64 *buf_array, int count) -{ - struct device *dev = priv->net_dev->dev.parent; - void *vaddr; - int i; - - for (i = 0; i < count; i++) { - vaddr = dpaa2_iova_to_virt(priv->iommu_domain, buf_array[i]); - dma_unmap_single(dev, buf_array[i], DPAA2_ETH_RX_BUF_SIZE, - DMA_FROM_DEVICE); - skb_free_frag(vaddr); - } -} - -/* Perform a single release command to add buffers - * to the specified buffer pool - */ -static int add_bufs(struct dpaa2_eth_priv *priv, - struct dpaa2_eth_channel *ch, u16 bpid) -{ - struct device *dev = priv->net_dev->dev.parent; - u64 buf_array[DPAA2_ETH_BUFS_PER_CMD]; - void *buf; - dma_addr_t addr; - int i, err; - - for (i = 0; i < DPAA2_ETH_BUFS_PER_CMD; i++) { - /* Allocate buffer visible to WRIOP + skb shared info + - * alignment padding - */ - buf = napi_alloc_frag(dpaa2_eth_buf_raw_size(priv)); - if (unlikely(!buf)) - goto err_alloc; - - buf = PTR_ALIGN(buf, priv->rx_buf_align); - - addr = dma_map_single(dev, buf, DPAA2_ETH_RX_BUF_SIZE, - DMA_FROM_DEVICE); - if (unlikely(dma_mapping_error(dev, addr))) - goto err_map; - - buf_array[i] = addr; - - /* tracing point */ - trace_dpaa2_eth_buf_seed(priv->net_dev, - buf, dpaa2_eth_buf_raw_size(priv), - addr, DPAA2_ETH_RX_BUF_SIZE, - bpid); - } - -release_bufs: - /* In case the portal is busy, retry until successful */ - while ((err = dpaa2_io_service_release(ch->dpio, bpid, - buf_array, i)) == -EBUSY) - cpu_relax(); - - /* If release command failed, clean up and bail out; - * not much else we can do about it - */ - if (err) { - free_bufs(priv, buf_array, i); - return 0; - } - - return i; - -err_map: - skb_free_frag(buf); -err_alloc: - /* If we managed to allocate at least some buffers, - * release them to hardware - */ - if (i) - goto release_bufs; - - return 0; -} - -static int seed_pool(struct dpaa2_eth_priv *priv, u16 bpid) -{ - int i, j; - int new_count; - - /* This is the lazy seeding of Rx buffer pools. - * dpaa2_add_bufs() is also used on the Rx hotpath and calls - * napi_alloc_frag(). The trouble with that is that it in turn ends up - * calling this_cpu_ptr(), which mandates execution in atomic context. - * Rather than splitting up the code, do a one-off preempt disable. - */ - preempt_disable(); - for (j = 0; j < priv->num_channels; j++) { - for (i = 0; i < DPAA2_ETH_NUM_BUFS; - i += DPAA2_ETH_BUFS_PER_CMD) { - new_count = add_bufs(priv, priv->channel[j], bpid); - priv->channel[j]->buf_count += new_count; - - if (new_count < DPAA2_ETH_BUFS_PER_CMD) { - preempt_enable(); - return -ENOMEM; - } - } - } - preempt_enable(); - - return 0; -} - -/** - * Drain the specified number of buffers from the DPNI's private buffer pool. - * @count must not exceeed DPAA2_ETH_BUFS_PER_CMD - */ -static void drain_bufs(struct dpaa2_eth_priv *priv, int count) -{ - u64 buf_array[DPAA2_ETH_BUFS_PER_CMD]; - int ret; - - do { - ret = dpaa2_io_service_acquire(NULL, priv->bpid, - buf_array, count); - if (ret < 0) { - netdev_err(priv->net_dev, "dpaa2_io_service_acquire() failed\n"); - return; - } - free_bufs(priv, buf_array, ret); - } while (ret); -} - -static void drain_pool(struct dpaa2_eth_priv *priv) -{ - int i; - - drain_bufs(priv, DPAA2_ETH_BUFS_PER_CMD); - drain_bufs(priv, 1); - - for (i = 0; i < priv->num_channels; i++) - priv->channel[i]->buf_count = 0; -} - -/* Function is called from softirq context only, so we don't need to guard - * the access to percpu count - */ -static int refill_pool(struct dpaa2_eth_priv *priv, - struct dpaa2_eth_channel *ch, - u16 bpid) -{ - int new_count; - - if (likely(ch->buf_count >= DPAA2_ETH_REFILL_THRESH)) - return 0; - - do { - new_count = add_bufs(priv, ch, bpid); - if (unlikely(!new_count)) { - /* Out of memory; abort for now, we'll try later on */ - break; - } - ch->buf_count += new_count; - } while (ch->buf_count < DPAA2_ETH_NUM_BUFS); - - if (unlikely(ch->buf_count < DPAA2_ETH_NUM_BUFS)) - return -ENOMEM; - - return 0; -} - -static int pull_channel(struct dpaa2_eth_channel *ch) -{ - int err; - int dequeues = -1; - - /* Retry while portal is busy */ - do { - err = dpaa2_io_service_pull_channel(ch->dpio, ch->ch_id, - ch->store); - dequeues++; - cpu_relax(); - } while (err == -EBUSY); - - ch->stats.dequeue_portal_busy += dequeues; - if (unlikely(err)) - ch->stats.pull_err++; - - return err; -} - -/* NAPI poll routine - * - * Frames are dequeued from the QMan channel associated with this NAPI context. - * Rx, Tx confirmation and (if configured) Rx error frames all count - * towards the NAPI budget. - */ -static int dpaa2_eth_poll(struct napi_struct *napi, int budget) -{ - struct dpaa2_eth_channel *ch; - int cleaned = 0, store_cleaned; - struct dpaa2_eth_priv *priv; - int err; - - ch = container_of(napi, struct dpaa2_eth_channel, napi); - priv = ch->priv; - - while (cleaned < budget) { - err = pull_channel(ch); - if (unlikely(err)) - break; - - /* Refill pool if appropriate */ - refill_pool(priv, ch, priv->bpid); - - store_cleaned = consume_frames(ch); - cleaned += store_cleaned; - - /* If we have enough budget left for a full store, - * try a new pull dequeue, otherwise we're done here - */ - if (store_cleaned == 0 || - cleaned > budget - DPAA2_ETH_STORE_SIZE) - break; - } - - if (cleaned < budget && napi_complete_done(napi, cleaned)) { - /* Re-enable data available notifications */ - do { - err = dpaa2_io_service_rearm(ch->dpio, &ch->nctx); - cpu_relax(); - } while (err == -EBUSY); - WARN_ONCE(err, "CDAN notifications rearm failed on core %d", - ch->nctx.desired_cpu); - } - - ch->stats.frames += cleaned; - - return cleaned; -} - -static void enable_ch_napi(struct dpaa2_eth_priv *priv) -{ - struct dpaa2_eth_channel *ch; - int i; - - for (i = 0; i < priv->num_channels; i++) { - ch = priv->channel[i]; - napi_enable(&ch->napi); - } -} - -static void disable_ch_napi(struct dpaa2_eth_priv *priv) -{ - struct dpaa2_eth_channel *ch; - int i; - - for (i = 0; i < priv->num_channels; i++) { - ch = priv->channel[i]; - napi_disable(&ch->napi); - } -} - -static int link_state_update(struct dpaa2_eth_priv *priv) -{ - struct dpni_link_state state; - int err; - - err = dpni_get_link_state(priv->mc_io, 0, priv->mc_token, &state); - if (unlikely(err)) { - netdev_err(priv->net_dev, - "dpni_get_link_state() failed\n"); - return err; - } - - /* Chech link state; speed / duplex changes are not treated yet */ - if (priv->link_state.up == state.up) - return 0; - - priv->link_state = state; - if (state.up) { - netif_carrier_on(priv->net_dev); - netif_tx_start_all_queues(priv->net_dev); - } else { - netif_tx_stop_all_queues(priv->net_dev); - netif_carrier_off(priv->net_dev); - } - - netdev_info(priv->net_dev, "Link Event: state %s\n", - state.up ? "up" : "down"); - - return 0; -} - -static int dpaa2_eth_open(struct net_device *net_dev) -{ - struct dpaa2_eth_priv *priv = netdev_priv(net_dev); - int err; - - err = seed_pool(priv, priv->bpid); - if (err) { - /* Not much to do; the buffer pool, though not filled up, - * may still contain some buffers which would enable us - * to limp on. - */ - netdev_err(net_dev, "Buffer seeding failed for DPBP %d (bpid=%d)\n", - priv->dpbp_dev->obj_desc.id, priv->bpid); - } - - /* We'll only start the txqs when the link is actually ready; make sure - * we don't race against the link up notification, which may come - * immediately after dpni_enable(); - */ - netif_tx_stop_all_queues(net_dev); - enable_ch_napi(priv); - /* Also, explicitly set carrier off, otherwise netif_carrier_ok() will - * return true and cause 'ip link show' to report the LOWER_UP flag, - * even though the link notification wasn't even received. - */ - netif_carrier_off(net_dev); - - err = dpni_enable(priv->mc_io, 0, priv->mc_token); - if (err < 0) { - netdev_err(net_dev, "dpni_enable() failed\n"); - goto enable_err; - } - - /* If the DPMAC object has already processed the link up interrupt, - * we have to learn the link state ourselves. - */ - err = link_state_update(priv); - if (err < 0) { - netdev_err(net_dev, "Can't update link state\n"); - goto link_state_err; - } - - return 0; - -link_state_err: -enable_err: - disable_ch_napi(priv); - drain_pool(priv); - return err; -} - -/* The DPIO store must be empty when we call this, - * at the end of every NAPI cycle. - */ -static u32 drain_channel(struct dpaa2_eth_priv *priv, - struct dpaa2_eth_channel *ch) -{ - u32 drained = 0, total = 0; - - do { - pull_channel(ch); - drained = consume_frames(ch); - total += drained; - } while (drained); - - return total; -} - -static u32 drain_ingress_frames(struct dpaa2_eth_priv *priv) -{ - struct dpaa2_eth_channel *ch; - int i; - u32 drained = 0; - - for (i = 0; i < priv->num_channels; i++) { - ch = priv->channel[i]; - drained += drain_channel(priv, ch); - } - - return drained; -} - -static int dpaa2_eth_stop(struct net_device *net_dev) -{ - struct dpaa2_eth_priv *priv = netdev_priv(net_dev); - int dpni_enabled; - int retries = 10; - u32 drained; - - netif_tx_stop_all_queues(net_dev); - netif_carrier_off(net_dev); - - /* Loop while dpni_disable() attempts to drain the egress FQs - * and confirm them back to us. - */ - do { - dpni_disable(priv->mc_io, 0, priv->mc_token); - dpni_is_enabled(priv->mc_io, 0, priv->mc_token, &dpni_enabled); - if (dpni_enabled) - /* Allow the hardware some slack */ - msleep(100); - } while (dpni_enabled && --retries); - if (!retries) { - netdev_warn(net_dev, "Retry count exceeded disabling DPNI\n"); - /* Must go on and disable NAPI nonetheless, so we don't crash at - * the next "ifconfig up" - */ - } - - /* Wait for NAPI to complete on every core and disable it. - * In particular, this will also prevent NAPI from being rescheduled if - * a new CDAN is serviced, effectively discarding the CDAN. We therefore - * don't even need to disarm the channels, except perhaps for the case - * of a huge coalescing value. - */ - disable_ch_napi(priv); - - /* Manually drain the Rx and TxConf queues */ - drained = drain_ingress_frames(priv); - if (drained) - netdev_dbg(net_dev, "Drained %d frames.\n", drained); - - /* Empty the buffer pool */ - drain_pool(priv); - - return 0; -} - -static int dpaa2_eth_set_addr(struct net_device *net_dev, void *addr) -{ - struct dpaa2_eth_priv *priv = netdev_priv(net_dev); - struct device *dev = net_dev->dev.parent; - int err; - - err = eth_mac_addr(net_dev, addr); - if (err < 0) { - dev_err(dev, "eth_mac_addr() failed (%d)\n", err); - return err; - } - - err = dpni_set_primary_mac_addr(priv->mc_io, 0, priv->mc_token, - net_dev->dev_addr); - if (err) { - dev_err(dev, "dpni_set_primary_mac_addr() failed (%d)\n", err); - return err; - } - - return 0; -} - -/** Fill in counters maintained by the GPP driver. These may be different from - * the hardware counters obtained by ethtool. - */ -static void dpaa2_eth_get_stats(struct net_device *net_dev, - struct rtnl_link_stats64 *stats) -{ - struct dpaa2_eth_priv *priv = netdev_priv(net_dev); - struct rtnl_link_stats64 *percpu_stats; - u64 *cpustats; - u64 *netstats = (u64 *)stats; - int i, j; - int num = sizeof(struct rtnl_link_stats64) / sizeof(u64); - - for_each_possible_cpu(i) { - percpu_stats = per_cpu_ptr(priv->percpu_stats, i); - cpustats = (u64 *)percpu_stats; - for (j = 0; j < num; j++) - netstats[j] += cpustats[j]; - } -} - -/* Copy mac unicast addresses from @net_dev to @priv. - * Its sole purpose is to make dpaa2_eth_set_rx_mode() more readable. - */ -static void add_uc_hw_addr(const struct net_device *net_dev, - struct dpaa2_eth_priv *priv) -{ - struct netdev_hw_addr *ha; - int err; - - netdev_for_each_uc_addr(ha, net_dev) { - err = dpni_add_mac_addr(priv->mc_io, 0, priv->mc_token, - ha->addr); - if (err) - netdev_warn(priv->net_dev, - "Could not add ucast MAC %pM to the filtering table (err %d)\n", - ha->addr, err); - } -} - -/* Copy mac multicast addresses from @net_dev to @priv - * Its sole purpose is to make dpaa2_eth_set_rx_mode() more readable. - */ -static void add_mc_hw_addr(const struct net_device *net_dev, - struct dpaa2_eth_priv *priv) -{ - struct netdev_hw_addr *ha; - int err; - - netdev_for_each_mc_addr(ha, net_dev) { - err = dpni_add_mac_addr(priv->mc_io, 0, priv->mc_token, - ha->addr); - if (err) - netdev_warn(priv->net_dev, - "Could not add mcast MAC %pM to the filtering table (err %d)\n", - ha->addr, err); - } -} - -static void dpaa2_eth_set_rx_mode(struct net_device *net_dev) -{ - struct dpaa2_eth_priv *priv = netdev_priv(net_dev); - int uc_count = netdev_uc_count(net_dev); - int mc_count = netdev_mc_count(net_dev); - u8 max_mac = priv->dpni_attrs.mac_filter_entries; - u32 options = priv->dpni_attrs.options; - u16 mc_token = priv->mc_token; - struct fsl_mc_io *mc_io = priv->mc_io; - int err; - - /* Basic sanity checks; these probably indicate a misconfiguration */ - if (options & DPNI_OPT_NO_MAC_FILTER && max_mac != 0) - netdev_info(net_dev, - "mac_filter_entries=%d, DPNI_OPT_NO_MAC_FILTER option must be disabled\n", - max_mac); - - /* Force promiscuous if the uc or mc counts exceed our capabilities. */ - if (uc_count > max_mac) { - netdev_info(net_dev, - "Unicast addr count reached %d, max allowed is %d; forcing promisc\n", - uc_count, max_mac); - goto force_promisc; - } - if (mc_count + uc_count > max_mac) { - netdev_info(net_dev, - "Unicast + multicast addr count reached %d, max allowed is %d; forcing promisc\n", - uc_count + mc_count, max_mac); - goto force_mc_promisc; - } - - /* Adjust promisc settings due to flag combinations */ - if (net_dev->flags & IFF_PROMISC) - goto force_promisc; - if (net_dev->flags & IFF_ALLMULTI) { - /* First, rebuild unicast filtering table. This should be done - * in promisc mode, in order to avoid frame loss while we - * progressively add entries to the table. - * We don't know whether we had been in promisc already, and - * making an MC call to find out is expensive; so set uc promisc - * nonetheless. - */ - err = dpni_set_unicast_promisc(mc_io, 0, mc_token, 1); - if (err) - netdev_warn(net_dev, "Can't set uc promisc\n"); - - /* Actual uc table reconstruction. */ - err = dpni_clear_mac_filters(mc_io, 0, mc_token, 1, 0); - if (err) - netdev_warn(net_dev, "Can't clear uc filters\n"); - add_uc_hw_addr(net_dev, priv); - - /* Finally, clear uc promisc and set mc promisc as requested. */ - err = dpni_set_unicast_promisc(mc_io, 0, mc_token, 0); - if (err) - netdev_warn(net_dev, "Can't clear uc promisc\n"); - goto force_mc_promisc; - } - - /* Neither unicast, nor multicast promisc will be on... eventually. - * For now, rebuild mac filtering tables while forcing both of them on. - */ - err = dpni_set_unicast_promisc(mc_io, 0, mc_token, 1); - if (err) - netdev_warn(net_dev, "Can't set uc promisc (%d)\n", err); - err = dpni_set_multicast_promisc(mc_io, 0, mc_token, 1); - if (err) - netdev_warn(net_dev, "Can't set mc promisc (%d)\n", err); - - /* Actual mac filtering tables reconstruction */ - err = dpni_clear_mac_filters(mc_io, 0, mc_token, 1, 1); - if (err) - netdev_warn(net_dev, "Can't clear mac filters\n"); - add_mc_hw_addr(net_dev, priv); - add_uc_hw_addr(net_dev, priv); - - /* Now we can clear both ucast and mcast promisc, without risking - * to drop legitimate frames anymore. - */ - err = dpni_set_unicast_promisc(mc_io, 0, mc_token, 0); - if (err) - netdev_warn(net_dev, "Can't clear ucast promisc\n"); - err = dpni_set_multicast_promisc(mc_io, 0, mc_token, 0); - if (err) - netdev_warn(net_dev, "Can't clear mcast promisc\n"); - - return; - -force_promisc: - err = dpni_set_unicast_promisc(mc_io, 0, mc_token, 1); - if (err) - netdev_warn(net_dev, "Can't set ucast promisc\n"); -force_mc_promisc: - err = dpni_set_multicast_promisc(mc_io, 0, mc_token, 1); - if (err) - netdev_warn(net_dev, "Can't set mcast promisc\n"); -} - -static int dpaa2_eth_set_features(struct net_device *net_dev, - netdev_features_t features) -{ - struct dpaa2_eth_priv *priv = netdev_priv(net_dev); - netdev_features_t changed = features ^ net_dev->features; - bool enable; - int err; - - if (changed & NETIF_F_RXCSUM) { - enable = !!(features & NETIF_F_RXCSUM); - err = set_rx_csum(priv, enable); - if (err) - return err; - } - - if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) { - enable = !!(features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)); - err = set_tx_csum(priv, enable); - if (err) - return err; - } - - return 0; -} - -static int dpaa2_eth_ts_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) -{ - struct dpaa2_eth_priv *priv = netdev_priv(dev); - struct hwtstamp_config config; - - if (copy_from_user(&config, rq->ifr_data, sizeof(config))) - return -EFAULT; - - switch (config.tx_type) { - case HWTSTAMP_TX_OFF: - priv->tx_tstamp = false; - break; - case HWTSTAMP_TX_ON: - priv->tx_tstamp = true; - break; - default: - return -ERANGE; - } - - if (config.rx_filter == HWTSTAMP_FILTER_NONE) { - priv->rx_tstamp = false; - } else { - priv->rx_tstamp = true; - /* TS is set for all frame types, not only those requested */ - config.rx_filter = HWTSTAMP_FILTER_ALL; - } - - return copy_to_user(rq->ifr_data, &config, sizeof(config)) ? - -EFAULT : 0; -} - -static int dpaa2_eth_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) -{ - if (cmd == SIOCSHWTSTAMP) - return dpaa2_eth_ts_ioctl(dev, rq, cmd); - - return -EINVAL; -} - -static const struct net_device_ops dpaa2_eth_ops = { - .ndo_open = dpaa2_eth_open, - .ndo_start_xmit = dpaa2_eth_tx, - .ndo_stop = dpaa2_eth_stop, - .ndo_set_mac_address = dpaa2_eth_set_addr, - .ndo_get_stats64 = dpaa2_eth_get_stats, - .ndo_set_rx_mode = dpaa2_eth_set_rx_mode, - .ndo_set_features = dpaa2_eth_set_features, - .ndo_do_ioctl = dpaa2_eth_ioctl, -}; - -static void cdan_cb(struct dpaa2_io_notification_ctx *ctx) -{ - struct dpaa2_eth_channel *ch; - - ch = container_of(ctx, struct dpaa2_eth_channel, nctx); - - /* Update NAPI statistics */ - ch->stats.cdan++; - - napi_schedule_irqoff(&ch->napi); -} - -/* Allocate and configure a DPCON object */ -static struct fsl_mc_device *setup_dpcon(struct dpaa2_eth_priv *priv) -{ - struct fsl_mc_device *dpcon; - struct device *dev = priv->net_dev->dev.parent; - struct dpcon_attr attrs; - int err; - - err = fsl_mc_object_allocate(to_fsl_mc_device(dev), - FSL_MC_POOL_DPCON, &dpcon); - if (err) { - dev_info(dev, "Not enough DPCONs, will go on as-is\n"); - return NULL; - } - - err = dpcon_open(priv->mc_io, 0, dpcon->obj_desc.id, &dpcon->mc_handle); - if (err) { - dev_err(dev, "dpcon_open() failed\n"); - goto free; - } - - err = dpcon_reset(priv->mc_io, 0, dpcon->mc_handle); - if (err) { - dev_err(dev, "dpcon_reset() failed\n"); - goto close; - } - - err = dpcon_get_attributes(priv->mc_io, 0, dpcon->mc_handle, &attrs); - if (err) { - dev_err(dev, "dpcon_get_attributes() failed\n"); - goto close; - } - - err = dpcon_enable(priv->mc_io, 0, dpcon->mc_handle); - if (err) { - dev_err(dev, "dpcon_enable() failed\n"); - goto close; - } - - return dpcon; - -close: - dpcon_close(priv->mc_io, 0, dpcon->mc_handle); -free: - fsl_mc_object_free(dpcon); - - return NULL; -} - -static void free_dpcon(struct dpaa2_eth_priv *priv, - struct fsl_mc_device *dpcon) -{ - dpcon_disable(priv->mc_io, 0, dpcon->mc_handle); - dpcon_close(priv->mc_io, 0, dpcon->mc_handle); - fsl_mc_object_free(dpcon); -} - -static struct dpaa2_eth_channel * -alloc_channel(struct dpaa2_eth_priv *priv) -{ - struct dpaa2_eth_channel *channel; - struct dpcon_attr attr; - struct device *dev = priv->net_dev->dev.parent; - int err; - - channel = kzalloc(sizeof(*channel), GFP_KERNEL); - if (!channel) - return NULL; - - channel->dpcon = setup_dpcon(priv); - if (!channel->dpcon) - goto err_setup; - - err = dpcon_get_attributes(priv->mc_io, 0, channel->dpcon->mc_handle, - &attr); - if (err) { - dev_err(dev, "dpcon_get_attributes() failed\n"); - goto err_get_attr; - } - - channel->dpcon_id = attr.id; - channel->ch_id = attr.qbman_ch_id; - channel->priv = priv; - - return channel; - -err_get_attr: - free_dpcon(priv, channel->dpcon); -err_setup: - kfree(channel); - return NULL; -} - -static void free_channel(struct dpaa2_eth_priv *priv, - struct dpaa2_eth_channel *channel) -{ - free_dpcon(priv, channel->dpcon); - kfree(channel); -} - -/* DPIO setup: allocate and configure QBMan channels, setup core affinity - * and register data availability notifications - */ -static int setup_dpio(struct dpaa2_eth_priv *priv) -{ - struct dpaa2_io_notification_ctx *nctx; - struct dpaa2_eth_channel *channel; - struct dpcon_notification_cfg dpcon_notif_cfg; - struct device *dev = priv->net_dev->dev.parent; - int i, err; - - /* We want the ability to spread ingress traffic (RX, TX conf) to as - * many cores as possible, so we need one channel for each core - * (unless there's fewer queues than cores, in which case the extra - * channels would be wasted). - * Allocate one channel per core and register it to the core's - * affine DPIO. If not enough channels are available for all cores - * or if some cores don't have an affine DPIO, there will be no - * ingress frame processing on those cores. - */ - cpumask_clear(&priv->dpio_cpumask); - for_each_online_cpu(i) { - /* Try to allocate a channel */ - channel = alloc_channel(priv); - if (!channel) { - dev_info(dev, - "No affine channel for cpu %d and above\n", i); - err = -ENODEV; - goto err_alloc_ch; - } - - priv->channel[priv->num_channels] = channel; - - nctx = &channel->nctx; - nctx->is_cdan = 1; - nctx->cb = cdan_cb; - nctx->id = channel->ch_id; - nctx->desired_cpu = i; - - /* Register the new context */ - channel->dpio = dpaa2_io_service_select(i); - err = dpaa2_io_service_register(channel->dpio, nctx); - if (err) { - dev_dbg(dev, "No affine DPIO for cpu %d\n", i); - /* If no affine DPIO for this core, there's probably - * none available for next cores either. Signal we want - * to retry later, in case the DPIO devices weren't - * probed yet. - */ - err = -EPROBE_DEFER; - goto err_service_reg; - } - - /* Register DPCON notification with MC */ - dpcon_notif_cfg.dpio_id = nctx->dpio_id; - dpcon_notif_cfg.priority = 0; - dpcon_notif_cfg.user_ctx = nctx->qman64; - err = dpcon_set_notification(priv->mc_io, 0, - channel->dpcon->mc_handle, - &dpcon_notif_cfg); - if (err) { - dev_err(dev, "dpcon_set_notification failed()\n"); - goto err_set_cdan; - } - - /* If we managed to allocate a channel and also found an affine - * DPIO for this core, add it to the final mask - */ - cpumask_set_cpu(i, &priv->dpio_cpumask); - priv->num_channels++; - - /* Stop if we already have enough channels to accommodate all - * RX and TX conf queues - */ - if (priv->num_channels == dpaa2_eth_queue_count(priv)) - break; - } - - return 0; - -err_set_cdan: - dpaa2_io_service_deregister(channel->dpio, nctx); -err_service_reg: - free_channel(priv, channel); -err_alloc_ch: - if (cpumask_empty(&priv->dpio_cpumask)) { - dev_err(dev, "No cpu with an affine DPIO/DPCON\n"); - return err; - } - - dev_info(dev, "Cores %*pbl available for processing ingress traffic\n", - cpumask_pr_args(&priv->dpio_cpumask)); - - return 0; -} - -static void free_dpio(struct dpaa2_eth_priv *priv) -{ - int i; - struct dpaa2_eth_channel *ch; - - /* deregister CDAN notifications and free channels */ - for (i = 0; i < priv->num_channels; i++) { - ch = priv->channel[i]; - dpaa2_io_service_deregister(ch->dpio, &ch->nctx); - free_channel(priv, ch); - } -} - -static struct dpaa2_eth_channel *get_affine_channel(struct dpaa2_eth_priv *priv, - int cpu) -{ - struct device *dev = priv->net_dev->dev.parent; - int i; - - for (i = 0; i < priv->num_channels; i++) - if (priv->channel[i]->nctx.desired_cpu == cpu) - return priv->channel[i]; - - /* We should never get here. Issue a warning and return - * the first channel, because it's still better than nothing - */ - dev_warn(dev, "No affine channel found for cpu %d\n", cpu); - - return priv->channel[0]; -} - -static void set_fq_affinity(struct dpaa2_eth_priv *priv) -{ - struct device *dev = priv->net_dev->dev.parent; - struct cpumask xps_mask; - struct dpaa2_eth_fq *fq; - int rx_cpu, txc_cpu; - int i, err; - - /* For each FQ, pick one channel/CPU to deliver frames to. - * This may well change at runtime, either through irqbalance or - * through direct user intervention. - */ - rx_cpu = txc_cpu = cpumask_first(&priv->dpio_cpumask); - - for (i = 0; i < priv->num_fqs; i++) { - fq = &priv->fq[i]; - switch (fq->type) { - case DPAA2_RX_FQ: - fq->target_cpu = rx_cpu; - rx_cpu = cpumask_next(rx_cpu, &priv->dpio_cpumask); - if (rx_cpu >= nr_cpu_ids) - rx_cpu = cpumask_first(&priv->dpio_cpumask); - break; - case DPAA2_TX_CONF_FQ: - fq->target_cpu = txc_cpu; - - /* Tell the stack to affine to txc_cpu the Tx queue - * associated with the confirmation one - */ - cpumask_clear(&xps_mask); - cpumask_set_cpu(txc_cpu, &xps_mask); - err = netif_set_xps_queue(priv->net_dev, &xps_mask, - fq->flowid); - if (err) - dev_err(dev, "Error setting XPS queue\n"); - - txc_cpu = cpumask_next(txc_cpu, &priv->dpio_cpumask); - if (txc_cpu >= nr_cpu_ids) - txc_cpu = cpumask_first(&priv->dpio_cpumask); - break; - default: - dev_err(dev, "Unknown FQ type: %d\n", fq->type); - } - fq->channel = get_affine_channel(priv, fq->target_cpu); - } -} - -static void setup_fqs(struct dpaa2_eth_priv *priv) -{ - int i; - - /* We have one TxConf FQ per Tx flow. - * The number of Tx and Rx queues is the same. - * Tx queues come first in the fq array. - */ - for (i = 0; i < dpaa2_eth_queue_count(priv); i++) { - priv->fq[priv->num_fqs].type = DPAA2_TX_CONF_FQ; - priv->fq[priv->num_fqs].consume = dpaa2_eth_tx_conf; - priv->fq[priv->num_fqs++].flowid = (u16)i; - } - - for (i = 0; i < dpaa2_eth_queue_count(priv); i++) { - priv->fq[priv->num_fqs].type = DPAA2_RX_FQ; - priv->fq[priv->num_fqs].consume = dpaa2_eth_rx; - priv->fq[priv->num_fqs++].flowid = (u16)i; - } - - /* For each FQ, decide on which core to process incoming frames */ - set_fq_affinity(priv); -} - -/* Allocate and configure one buffer pool for each interface */ -static int setup_dpbp(struct dpaa2_eth_priv *priv) -{ - int err; - struct fsl_mc_device *dpbp_dev; - struct device *dev = priv->net_dev->dev.parent; - struct dpbp_attr dpbp_attrs; - - err = fsl_mc_object_allocate(to_fsl_mc_device(dev), FSL_MC_POOL_DPBP, - &dpbp_dev); - if (err) { - dev_err(dev, "DPBP device allocation failed\n"); - return err; - } - - priv->dpbp_dev = dpbp_dev; - - err = dpbp_open(priv->mc_io, 0, priv->dpbp_dev->obj_desc.id, - &dpbp_dev->mc_handle); - if (err) { - dev_err(dev, "dpbp_open() failed\n"); - goto err_open; - } - - err = dpbp_reset(priv->mc_io, 0, dpbp_dev->mc_handle); - if (err) { - dev_err(dev, "dpbp_reset() failed\n"); - goto err_reset; - } - - err = dpbp_enable(priv->mc_io, 0, dpbp_dev->mc_handle); - if (err) { - dev_err(dev, "dpbp_enable() failed\n"); - goto err_enable; - } - - err = dpbp_get_attributes(priv->mc_io, 0, dpbp_dev->mc_handle, - &dpbp_attrs); - if (err) { - dev_err(dev, "dpbp_get_attributes() failed\n"); - goto err_get_attr; - } - priv->bpid = dpbp_attrs.bpid; - - return 0; - -err_get_attr: - dpbp_disable(priv->mc_io, 0, dpbp_dev->mc_handle); -err_enable: -err_reset: - dpbp_close(priv->mc_io, 0, dpbp_dev->mc_handle); -err_open: - fsl_mc_object_free(dpbp_dev); - - return err; -} - -static void free_dpbp(struct dpaa2_eth_priv *priv) -{ - drain_pool(priv); - dpbp_disable(priv->mc_io, 0, priv->dpbp_dev->mc_handle); - dpbp_close(priv->mc_io, 0, priv->dpbp_dev->mc_handle); - fsl_mc_object_free(priv->dpbp_dev); -} - -static int set_buffer_layout(struct dpaa2_eth_priv *priv) -{ - struct device *dev = priv->net_dev->dev.parent; - struct dpni_buffer_layout buf_layout = {0}; - int err; - - /* We need to check for WRIOP version 1.0.0, but depending on the MC - * version, this number is not always provided correctly on rev1. - * We need to check for both alternatives in this situation. - */ - if (priv->dpni_attrs.wriop_version == DPAA2_WRIOP_VERSION(0, 0, 0) || - priv->dpni_attrs.wriop_version == DPAA2_WRIOP_VERSION(1, 0, 0)) - priv->rx_buf_align = DPAA2_ETH_RX_BUF_ALIGN_REV1; - else - priv->rx_buf_align = DPAA2_ETH_RX_BUF_ALIGN; - - /* tx buffer */ - buf_layout.private_data_size = DPAA2_ETH_SWA_SIZE; - buf_layout.pass_timestamp = true; - buf_layout.options = DPNI_BUF_LAYOUT_OPT_PRIVATE_DATA_SIZE | - DPNI_BUF_LAYOUT_OPT_TIMESTAMP; - err = dpni_set_buffer_layout(priv->mc_io, 0, priv->mc_token, - DPNI_QUEUE_TX, &buf_layout); - if (err) { - dev_err(dev, "dpni_set_buffer_layout(TX) failed\n"); - return err; - } - - /* tx-confirm buffer */ - buf_layout.options = DPNI_BUF_LAYOUT_OPT_TIMESTAMP; - err = dpni_set_buffer_layout(priv->mc_io, 0, priv->mc_token, - DPNI_QUEUE_TX_CONFIRM, &buf_layout); - if (err) { - dev_err(dev, "dpni_set_buffer_layout(TX_CONF) failed\n"); - return err; - } - - /* Now that we've set our tx buffer layout, retrieve the minimum - * required tx data offset. - */ - err = dpni_get_tx_data_offset(priv->mc_io, 0, priv->mc_token, - &priv->tx_data_offset); - if (err) { - dev_err(dev, "dpni_get_tx_data_offset() failed\n"); - return err; - } - - if ((priv->tx_data_offset % 64) != 0) - dev_warn(dev, "Tx data offset (%d) not a multiple of 64B\n", - priv->tx_data_offset); - - /* rx buffer */ - buf_layout.pass_frame_status = true; - buf_layout.pass_parser_result = true; - buf_layout.data_align = priv->rx_buf_align; - buf_layout.data_head_room = dpaa2_eth_rx_head_room(priv); - buf_layout.private_data_size = 0; - buf_layout.options = DPNI_BUF_LAYOUT_OPT_PARSER_RESULT | - DPNI_BUF_LAYOUT_OPT_FRAME_STATUS | - DPNI_BUF_LAYOUT_OPT_DATA_ALIGN | - DPNI_BUF_LAYOUT_OPT_DATA_HEAD_ROOM | - DPNI_BUF_LAYOUT_OPT_TIMESTAMP; - err = dpni_set_buffer_layout(priv->mc_io, 0, priv->mc_token, - DPNI_QUEUE_RX, &buf_layout); - if (err) { - dev_err(dev, "dpni_set_buffer_layout(RX) failed\n"); - return err; - } - - return 0; -} - -/* Configure the DPNI object this interface is associated with */ -static int setup_dpni(struct fsl_mc_device *ls_dev) -{ - struct device *dev = &ls_dev->dev; - struct dpaa2_eth_priv *priv; - struct net_device *net_dev; - int err; - - net_dev = dev_get_drvdata(dev); - priv = netdev_priv(net_dev); - - /* get a handle for the DPNI object */ - err = dpni_open(priv->mc_io, 0, ls_dev->obj_desc.id, &priv->mc_token); - if (err) { - dev_err(dev, "dpni_open() failed\n"); - return err; - } - - /* Check if we can work with this DPNI object */ - err = dpni_get_api_version(priv->mc_io, 0, &priv->dpni_ver_major, - &priv->dpni_ver_minor); - if (err) { - dev_err(dev, "dpni_get_api_version() failed\n"); - goto close; - } - if (dpaa2_eth_cmp_dpni_ver(priv, DPNI_VER_MAJOR, DPNI_VER_MINOR) < 0) { - dev_err(dev, "DPNI version %u.%u not supported, need >= %u.%u\n", - priv->dpni_ver_major, priv->dpni_ver_minor, - DPNI_VER_MAJOR, DPNI_VER_MINOR); - err = -ENOTSUPP; - goto close; - } - - ls_dev->mc_io = priv->mc_io; - ls_dev->mc_handle = priv->mc_token; - - err = dpni_reset(priv->mc_io, 0, priv->mc_token); - if (err) { - dev_err(dev, "dpni_reset() failed\n"); - goto close; - } - - err = dpni_get_attributes(priv->mc_io, 0, priv->mc_token, - &priv->dpni_attrs); - if (err) { - dev_err(dev, "dpni_get_attributes() failed (err=%d)\n", err); - goto close; - } - - err = set_buffer_layout(priv); - if (err) - goto close; - - return 0; - -close: - dpni_close(priv->mc_io, 0, priv->mc_token); - - return err; -} - -static void free_dpni(struct dpaa2_eth_priv *priv) -{ - int err; - - err = dpni_reset(priv->mc_io, 0, priv->mc_token); - if (err) - netdev_warn(priv->net_dev, "dpni_reset() failed (err %d)\n", - err); - - dpni_close(priv->mc_io, 0, priv->mc_token); -} - -static int setup_rx_flow(struct dpaa2_eth_priv *priv, - struct dpaa2_eth_fq *fq) -{ - struct device *dev = priv->net_dev->dev.parent; - struct dpni_queue queue; - struct dpni_queue_id qid; - struct dpni_taildrop td; - int err; - - err = dpni_get_queue(priv->mc_io, 0, priv->mc_token, - DPNI_QUEUE_RX, 0, fq->flowid, &queue, &qid); - if (err) { - dev_err(dev, "dpni_get_queue(RX) failed\n"); - return err; - } - - fq->fqid = qid.fqid; - - queue.destination.id = fq->channel->dpcon_id; - queue.destination.type = DPNI_DEST_DPCON; - queue.destination.priority = 1; - queue.user_context = (u64)(uintptr_t)fq; - err = dpni_set_queue(priv->mc_io, 0, priv->mc_token, - DPNI_QUEUE_RX, 0, fq->flowid, - DPNI_QUEUE_OPT_USER_CTX | DPNI_QUEUE_OPT_DEST, - &queue); - if (err) { - dev_err(dev, "dpni_set_queue(RX) failed\n"); - return err; - } - - td.enable = 1; - td.threshold = DPAA2_ETH_TAILDROP_THRESH; - err = dpni_set_taildrop(priv->mc_io, 0, priv->mc_token, DPNI_CP_QUEUE, - DPNI_QUEUE_RX, 0, fq->flowid, &td); - if (err) { - dev_err(dev, "dpni_set_threshold() failed\n"); - return err; - } - - return 0; -} - -static int setup_tx_flow(struct dpaa2_eth_priv *priv, - struct dpaa2_eth_fq *fq) -{ - struct device *dev = priv->net_dev->dev.parent; - struct dpni_queue queue; - struct dpni_queue_id qid; - int err; - - err = dpni_get_queue(priv->mc_io, 0, priv->mc_token, - DPNI_QUEUE_TX, 0, fq->flowid, &queue, &qid); - if (err) { - dev_err(dev, "dpni_get_queue(TX) failed\n"); - return err; - } - - fq->tx_qdbin = qid.qdbin; - - err = dpni_get_queue(priv->mc_io, 0, priv->mc_token, - DPNI_QUEUE_TX_CONFIRM, 0, fq->flowid, - &queue, &qid); - if (err) { - dev_err(dev, "dpni_get_queue(TX_CONF) failed\n"); - return err; - } - - fq->fqid = qid.fqid; - - queue.destination.id = fq->channel->dpcon_id; - queue.destination.type = DPNI_DEST_DPCON; - queue.destination.priority = 0; - queue.user_context = (u64)(uintptr_t)fq; - err = dpni_set_queue(priv->mc_io, 0, priv->mc_token, - DPNI_QUEUE_TX_CONFIRM, 0, fq->flowid, - DPNI_QUEUE_OPT_USER_CTX | DPNI_QUEUE_OPT_DEST, - &queue); - if (err) { - dev_err(dev, "dpni_set_queue(TX_CONF) failed\n"); - return err; - } - - return 0; -} - -/* Hash key is a 5-tuple: IPsrc, IPdst, IPnextproto, L4src, L4dst */ -static const struct dpaa2_eth_hash_fields hash_fields[] = { - { - /* IP header */ - .rxnfc_field = RXH_IP_SRC, - .cls_prot = NET_PROT_IP, - .cls_field = NH_FLD_IP_SRC, - .size = 4, - }, { - .rxnfc_field = RXH_IP_DST, - .cls_prot = NET_PROT_IP, - .cls_field = NH_FLD_IP_DST, - .size = 4, - }, { - .rxnfc_field = RXH_L3_PROTO, - .cls_prot = NET_PROT_IP, - .cls_field = NH_FLD_IP_PROTO, - .size = 1, - }, { - /* Using UDP ports, this is functionally equivalent to raw - * byte pairs from L4 header. - */ - .rxnfc_field = RXH_L4_B_0_1, - .cls_prot = NET_PROT_UDP, - .cls_field = NH_FLD_UDP_PORT_SRC, - .size = 2, - }, { - .rxnfc_field = RXH_L4_B_2_3, - .cls_prot = NET_PROT_UDP, - .cls_field = NH_FLD_UDP_PORT_DST, - .size = 2, - }, -}; - -/* Set RX hash options - * flags is a combination of RXH_ bits - */ -static int dpaa2_eth_set_hash(struct net_device *net_dev, u64 flags) -{ - struct device *dev = net_dev->dev.parent; - struct dpaa2_eth_priv *priv = netdev_priv(net_dev); - struct dpkg_profile_cfg cls_cfg; - struct dpni_rx_tc_dist_cfg dist_cfg; - u8 *dma_mem; - int i; - int err = 0; - - if (!dpaa2_eth_hash_enabled(priv)) { - dev_dbg(dev, "Hashing support is not enabled\n"); - return 0; - } - - memset(&cls_cfg, 0, sizeof(cls_cfg)); - - for (i = 0; i < ARRAY_SIZE(hash_fields); i++) { - struct dpkg_extract *key = - &cls_cfg.extracts[cls_cfg.num_extracts]; - - if (!(flags & hash_fields[i].rxnfc_field)) - continue; - - if (cls_cfg.num_extracts >= DPKG_MAX_NUM_OF_EXTRACTS) { - dev_err(dev, "error adding key extraction rule, too many rules?\n"); - return -E2BIG; - } - - key->type = DPKG_EXTRACT_FROM_HDR; - key->extract.from_hdr.prot = hash_fields[i].cls_prot; - key->extract.from_hdr.type = DPKG_FULL_FIELD; - key->extract.from_hdr.field = hash_fields[i].cls_field; - cls_cfg.num_extracts++; - - priv->rx_hash_fields |= hash_fields[i].rxnfc_field; - } - - dma_mem = kzalloc(DPAA2_CLASSIFIER_DMA_SIZE, GFP_KERNEL); - if (!dma_mem) - return -ENOMEM; - - err = dpni_prepare_key_cfg(&cls_cfg, dma_mem); - if (err) { - dev_err(dev, "dpni_prepare_key_cfg error %d\n", err); - goto err_prep_key; - } - - memset(&dist_cfg, 0, sizeof(dist_cfg)); - - /* Prepare for setting the rx dist */ - dist_cfg.key_cfg_iova = dma_map_single(dev, dma_mem, - DPAA2_CLASSIFIER_DMA_SIZE, - DMA_TO_DEVICE); - if (dma_mapping_error(dev, dist_cfg.key_cfg_iova)) { - dev_err(dev, "DMA mapping failed\n"); - err = -ENOMEM; - goto err_dma_map; - } - - dist_cfg.dist_size = dpaa2_eth_queue_count(priv); - dist_cfg.dist_mode = DPNI_DIST_MODE_HASH; - - err = dpni_set_rx_tc_dist(priv->mc_io, 0, priv->mc_token, 0, &dist_cfg); - dma_unmap_single(dev, dist_cfg.key_cfg_iova, - DPAA2_CLASSIFIER_DMA_SIZE, DMA_TO_DEVICE); - if (err) - dev_err(dev, "dpni_set_rx_tc_dist() error %d\n", err); - -err_dma_map: -err_prep_key: - kfree(dma_mem); - return err; -} - -/* Bind the DPNI to its needed objects and resources: buffer pool, DPIOs, - * frame queues and channels - */ -static int bind_dpni(struct dpaa2_eth_priv *priv) -{ - struct net_device *net_dev = priv->net_dev; - struct device *dev = net_dev->dev.parent; - struct dpni_pools_cfg pools_params; - struct dpni_error_cfg err_cfg; - int err = 0; - int i; - - pools_params.num_dpbp = 1; - pools_params.pools[0].dpbp_id = priv->dpbp_dev->obj_desc.id; - pools_params.pools[0].backup_pool = 0; - pools_params.pools[0].buffer_size = DPAA2_ETH_RX_BUF_SIZE; - err = dpni_set_pools(priv->mc_io, 0, priv->mc_token, &pools_params); - if (err) { - dev_err(dev, "dpni_set_pools() failed\n"); - return err; - } - - /* have the interface implicitly distribute traffic based on - * the default hash key - */ - err = dpaa2_eth_set_hash(net_dev, DPAA2_RXH_DEFAULT); - if (err) - dev_err(dev, "Failed to configure hashing\n"); - - /* Configure handling of error frames */ - err_cfg.errors = DPAA2_FAS_RX_ERR_MASK; - err_cfg.set_frame_annotation = 1; - err_cfg.error_action = DPNI_ERROR_ACTION_DISCARD; - err = dpni_set_errors_behavior(priv->mc_io, 0, priv->mc_token, - &err_cfg); - if (err) { - dev_err(dev, "dpni_set_errors_behavior failed\n"); - return err; - } - - /* Configure Rx and Tx conf queues to generate CDANs */ - for (i = 0; i < priv->num_fqs; i++) { - switch (priv->fq[i].type) { - case DPAA2_RX_FQ: - err = setup_rx_flow(priv, &priv->fq[i]); - break; - case DPAA2_TX_CONF_FQ: - err = setup_tx_flow(priv, &priv->fq[i]); - break; - default: - dev_err(dev, "Invalid FQ type %d\n", priv->fq[i].type); - return -EINVAL; - } - if (err) - return err; - } - - err = dpni_get_qdid(priv->mc_io, 0, priv->mc_token, - DPNI_QUEUE_TX, &priv->tx_qdid); - if (err) { - dev_err(dev, "dpni_get_qdid() failed\n"); - return err; - } - - return 0; -} - -/* Allocate rings for storing incoming frame descriptors */ -static int alloc_rings(struct dpaa2_eth_priv *priv) -{ - struct net_device *net_dev = priv->net_dev; - struct device *dev = net_dev->dev.parent; - int i; - - for (i = 0; i < priv->num_channels; i++) { - priv->channel[i]->store = - dpaa2_io_store_create(DPAA2_ETH_STORE_SIZE, dev); - if (!priv->channel[i]->store) { - netdev_err(net_dev, "dpaa2_io_store_create() failed\n"); - goto err_ring; - } - } - - return 0; - -err_ring: - for (i = 0; i < priv->num_channels; i++) { - if (!priv->channel[i]->store) - break; - dpaa2_io_store_destroy(priv->channel[i]->store); - } - - return -ENOMEM; -} - -static void free_rings(struct dpaa2_eth_priv *priv) -{ - int i; - - for (i = 0; i < priv->num_channels; i++) - dpaa2_io_store_destroy(priv->channel[i]->store); -} - -static int set_mac_addr(struct dpaa2_eth_priv *priv) -{ - struct net_device *net_dev = priv->net_dev; - struct device *dev = net_dev->dev.parent; - u8 mac_addr[ETH_ALEN], dpni_mac_addr[ETH_ALEN]; - int err; - - /* Get firmware address, if any */ - err = dpni_get_port_mac_addr(priv->mc_io, 0, priv->mc_token, mac_addr); - if (err) { - dev_err(dev, "dpni_get_port_mac_addr() failed\n"); - return err; - } - - /* Get DPNI attributes address, if any */ - err = dpni_get_primary_mac_addr(priv->mc_io, 0, priv->mc_token, - dpni_mac_addr); - if (err) { - dev_err(dev, "dpni_get_primary_mac_addr() failed\n"); - return err; - } - - /* First check if firmware has any address configured by bootloader */ - if (!is_zero_ether_addr(mac_addr)) { - /* If the DPMAC addr != DPNI addr, update it */ - if (!ether_addr_equal(mac_addr, dpni_mac_addr)) { - err = dpni_set_primary_mac_addr(priv->mc_io, 0, - priv->mc_token, - mac_addr); - if (err) { - dev_err(dev, "dpni_set_primary_mac_addr() failed\n"); - return err; - } - } - memcpy(net_dev->dev_addr, mac_addr, net_dev->addr_len); - } else if (is_zero_ether_addr(dpni_mac_addr)) { - /* No MAC address configured, fill in net_dev->dev_addr - * with a random one - */ - eth_hw_addr_random(net_dev); - dev_dbg_once(dev, "device(s) have all-zero hwaddr, replaced with random\n"); - - err = dpni_set_primary_mac_addr(priv->mc_io, 0, priv->mc_token, - net_dev->dev_addr); - if (err) { - dev_err(dev, "dpni_set_primary_mac_addr() failed\n"); - return err; - } - - /* Override NET_ADDR_RANDOM set by eth_hw_addr_random(); for all - * practical purposes, this will be our "permanent" mac address, - * at least until the next reboot. This move will also permit - * register_netdevice() to properly fill up net_dev->perm_addr. - */ - net_dev->addr_assign_type = NET_ADDR_PERM; - } else { - /* NET_ADDR_PERM is default, all we have to do is - * fill in the device addr. - */ - memcpy(net_dev->dev_addr, dpni_mac_addr, net_dev->addr_len); - } - - return 0; -} - -static int netdev_init(struct net_device *net_dev) -{ - struct device *dev = net_dev->dev.parent; - struct dpaa2_eth_priv *priv = netdev_priv(net_dev); - u32 options = priv->dpni_attrs.options; - u64 supported = 0, not_supported = 0; - u8 bcast_addr[ETH_ALEN]; - u8 num_queues; - int err; - - net_dev->netdev_ops = &dpaa2_eth_ops; - net_dev->ethtool_ops = &dpaa2_ethtool_ops; - - err = set_mac_addr(priv); - if (err) - return err; - - /* Explicitly add the broadcast address to the MAC filtering table */ - eth_broadcast_addr(bcast_addr); - err = dpni_add_mac_addr(priv->mc_io, 0, priv->mc_token, bcast_addr); - if (err) { - dev_err(dev, "dpni_add_mac_addr() failed\n"); - return err; - } - - /* Set MTU upper limit; lower limit is 68B (default value) */ - net_dev->max_mtu = DPAA2_ETH_MAX_MTU; - err = dpni_set_max_frame_length(priv->mc_io, 0, priv->mc_token, - DPAA2_ETH_MFL); - if (err) { - dev_err(dev, "dpni_set_max_frame_length() failed\n"); - return err; - } - - /* Set actual number of queues in the net device */ - num_queues = dpaa2_eth_queue_count(priv); - err = netif_set_real_num_tx_queues(net_dev, num_queues); - if (err) { - dev_err(dev, "netif_set_real_num_tx_queues() failed\n"); - return err; - } - err = netif_set_real_num_rx_queues(net_dev, num_queues); - if (err) { - dev_err(dev, "netif_set_real_num_rx_queues() failed\n"); - return err; - } - - /* Capabilities listing */ - supported |= IFF_LIVE_ADDR_CHANGE; - - if (options & DPNI_OPT_NO_MAC_FILTER) - not_supported |= IFF_UNICAST_FLT; - else - supported |= IFF_UNICAST_FLT; - - net_dev->priv_flags |= supported; - net_dev->priv_flags &= ~not_supported; - - /* Features */ - net_dev->features = NETIF_F_RXCSUM | - NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | - NETIF_F_SG | NETIF_F_HIGHDMA | - NETIF_F_LLTX; - net_dev->hw_features = net_dev->features; - - return 0; -} - -static int poll_link_state(void *arg) -{ - struct dpaa2_eth_priv *priv = (struct dpaa2_eth_priv *)arg; - int err; - - while (!kthread_should_stop()) { - err = link_state_update(priv); - if (unlikely(err)) - return err; - - msleep(DPAA2_ETH_LINK_STATE_REFRESH); - } - - return 0; -} - -static irqreturn_t dpni_irq0_handler_thread(int irq_num, void *arg) -{ - u32 status = ~0; - struct device *dev = (struct device *)arg; - struct fsl_mc_device *dpni_dev = to_fsl_mc_device(dev); - struct net_device *net_dev = dev_get_drvdata(dev); - int err; - - err = dpni_get_irq_status(dpni_dev->mc_io, 0, dpni_dev->mc_handle, - DPNI_IRQ_INDEX, &status); - if (unlikely(err)) { - netdev_err(net_dev, "Can't get irq status (err %d)\n", err); - return IRQ_HANDLED; - } - - if (status & DPNI_IRQ_EVENT_LINK_CHANGED) - link_state_update(netdev_priv(net_dev)); - - return IRQ_HANDLED; -} - -static int setup_irqs(struct fsl_mc_device *ls_dev) -{ - int err = 0; - struct fsl_mc_device_irq *irq; - - err = fsl_mc_allocate_irqs(ls_dev); - if (err) { - dev_err(&ls_dev->dev, "MC irqs allocation failed\n"); - return err; - } - - irq = ls_dev->irqs[0]; - err = devm_request_threaded_irq(&ls_dev->dev, irq->msi_desc->irq, - NULL, dpni_irq0_handler_thread, - IRQF_NO_SUSPEND | IRQF_ONESHOT, - dev_name(&ls_dev->dev), &ls_dev->dev); - if (err < 0) { - dev_err(&ls_dev->dev, "devm_request_threaded_irq(): %d\n", err); - goto free_mc_irq; - } - - err = dpni_set_irq_mask(ls_dev->mc_io, 0, ls_dev->mc_handle, - DPNI_IRQ_INDEX, DPNI_IRQ_EVENT_LINK_CHANGED); - if (err < 0) { - dev_err(&ls_dev->dev, "dpni_set_irq_mask(): %d\n", err); - goto free_irq; - } - - err = dpni_set_irq_enable(ls_dev->mc_io, 0, ls_dev->mc_handle, - DPNI_IRQ_INDEX, 1); - if (err < 0) { - dev_err(&ls_dev->dev, "dpni_set_irq_enable(): %d\n", err); - goto free_irq; - } - - return 0; - -free_irq: - devm_free_irq(&ls_dev->dev, irq->msi_desc->irq, &ls_dev->dev); -free_mc_irq: - fsl_mc_free_irqs(ls_dev); - - return err; -} - -static void add_ch_napi(struct dpaa2_eth_priv *priv) -{ - int i; - struct dpaa2_eth_channel *ch; - - for (i = 0; i < priv->num_channels; i++) { - ch = priv->channel[i]; - /* NAPI weight *MUST* be a multiple of DPAA2_ETH_STORE_SIZE */ - netif_napi_add(priv->net_dev, &ch->napi, dpaa2_eth_poll, - NAPI_POLL_WEIGHT); - } -} - -static void del_ch_napi(struct dpaa2_eth_priv *priv) -{ - int i; - struct dpaa2_eth_channel *ch; - - for (i = 0; i < priv->num_channels; i++) { - ch = priv->channel[i]; - netif_napi_del(&ch->napi); - } -} - -static int dpaa2_eth_probe(struct fsl_mc_device *dpni_dev) -{ - struct device *dev; - struct net_device *net_dev = NULL; - struct dpaa2_eth_priv *priv = NULL; - int err = 0; - - dev = &dpni_dev->dev; - - /* Net device */ - net_dev = alloc_etherdev_mq(sizeof(*priv), DPAA2_ETH_MAX_TX_QUEUES); - if (!net_dev) { - dev_err(dev, "alloc_etherdev_mq() failed\n"); - return -ENOMEM; - } - - SET_NETDEV_DEV(net_dev, dev); - dev_set_drvdata(dev, net_dev); - - priv = netdev_priv(net_dev); - priv->net_dev = net_dev; - - priv->iommu_domain = iommu_get_domain_for_dev(dev); - - /* Obtain a MC portal */ - err = fsl_mc_portal_allocate(dpni_dev, FSL_MC_IO_ATOMIC_CONTEXT_PORTAL, - &priv->mc_io); - if (err) { - if (err == -ENXIO) - err = -EPROBE_DEFER; - else - dev_err(dev, "MC portal allocation failed\n"); - goto err_portal_alloc; - } - - /* MC objects initialization and configuration */ - err = setup_dpni(dpni_dev); - if (err) - goto err_dpni_setup; - - err = setup_dpio(priv); - if (err) - goto err_dpio_setup; - - setup_fqs(priv); - - err = setup_dpbp(priv); - if (err) - goto err_dpbp_setup; - - err = bind_dpni(priv); - if (err) - goto err_bind; - - /* Add a NAPI context for each channel */ - add_ch_napi(priv); - - /* Percpu statistics */ - priv->percpu_stats = alloc_percpu(*priv->percpu_stats); - if (!priv->percpu_stats) { - dev_err(dev, "alloc_percpu(percpu_stats) failed\n"); - err = -ENOMEM; - goto err_alloc_percpu_stats; - } - priv->percpu_extras = alloc_percpu(*priv->percpu_extras); - if (!priv->percpu_extras) { - dev_err(dev, "alloc_percpu(percpu_extras) failed\n"); - err = -ENOMEM; - goto err_alloc_percpu_extras; - } - - err = netdev_init(net_dev); - if (err) - goto err_netdev_init; - - /* Configure checksum offload based on current interface flags */ - err = set_rx_csum(priv, !!(net_dev->features & NETIF_F_RXCSUM)); - if (err) - goto err_csum; - - err = set_tx_csum(priv, !!(net_dev->features & - (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))); - if (err) - goto err_csum; - - err = alloc_rings(priv); - if (err) - goto err_alloc_rings; - - err = setup_irqs(dpni_dev); - if (err) { - netdev_warn(net_dev, "Failed to set link interrupt, fall back to polling\n"); - priv->poll_thread = kthread_run(poll_link_state, priv, - "%s_poll_link", net_dev->name); - if (IS_ERR(priv->poll_thread)) { - dev_err(dev, "Error starting polling thread\n"); - goto err_poll_thread; - } - priv->do_link_poll = true; - } - - err = register_netdev(net_dev); - if (err < 0) { - dev_err(dev, "register_netdev() failed\n"); - goto err_netdev_reg; - } - - dev_info(dev, "Probed interface %s\n", net_dev->name); - return 0; - -err_netdev_reg: - if (priv->do_link_poll) - kthread_stop(priv->poll_thread); - else - fsl_mc_free_irqs(dpni_dev); -err_poll_thread: - free_rings(priv); -err_alloc_rings: -err_csum: -err_netdev_init: - free_percpu(priv->percpu_extras); -err_alloc_percpu_extras: - free_percpu(priv->percpu_stats); -err_alloc_percpu_stats: - del_ch_napi(priv); -err_bind: - free_dpbp(priv); -err_dpbp_setup: - free_dpio(priv); -err_dpio_setup: - free_dpni(priv); -err_dpni_setup: - fsl_mc_portal_free(priv->mc_io); -err_portal_alloc: - dev_set_drvdata(dev, NULL); - free_netdev(net_dev); - - return err; -} - -static int dpaa2_eth_remove(struct fsl_mc_device *ls_dev) -{ - struct device *dev; - struct net_device *net_dev; - struct dpaa2_eth_priv *priv; - - dev = &ls_dev->dev; - net_dev = dev_get_drvdata(dev); - priv = netdev_priv(net_dev); - - unregister_netdev(net_dev); - - if (priv->do_link_poll) - kthread_stop(priv->poll_thread); - else - fsl_mc_free_irqs(ls_dev); - - free_rings(priv); - free_percpu(priv->percpu_stats); - free_percpu(priv->percpu_extras); - - del_ch_napi(priv); - free_dpbp(priv); - free_dpio(priv); - free_dpni(priv); - - fsl_mc_portal_free(priv->mc_io); - - free_netdev(net_dev); - - dev_dbg(net_dev->dev.parent, "Removed interface %s\n", net_dev->name); - - return 0; -} - -static const struct fsl_mc_device_id dpaa2_eth_match_id_table[] = { - { - .vendor = FSL_MC_VENDOR_FREESCALE, - .obj_type = "dpni", - }, - { .vendor = 0x0 } -}; -MODULE_DEVICE_TABLE(fslmc, dpaa2_eth_match_id_table); - -static struct fsl_mc_driver dpaa2_eth_driver = { - .driver = { - .name = KBUILD_MODNAME, - .owner = THIS_MODULE, - }, - .probe = dpaa2_eth_probe, - .remove = dpaa2_eth_remove, - .match_id_table = dpaa2_eth_match_id_table -}; - -module_fsl_mc_driver(dpaa2_eth_driver); |