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path: root/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
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Diffstat (limited to 'drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c')
-rw-r--r--drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c214
1 files changed, 196 insertions, 18 deletions
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
index d9871b9c1aad..88534aa29af2 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
@@ -18,6 +18,7 @@
#include <linux/ptp_classify.h>
#include <net/pkt_cls.h>
#include <net/sock.h>
+#include <net/tso.h>
#include "dpaa2-eth.h"
@@ -1029,6 +1030,8 @@ static void dpaa2_eth_free_tx_fd(struct dpaa2_eth_priv *priv,
u8 fd_format = dpaa2_fd_get_format(fd);
u32 fd_len = dpaa2_fd_get_len(fd);
struct dpaa2_sg_entry *sgt;
+ int should_free_skb = 1;
+ int i;
fd_addr = dpaa2_fd_get_addr(fd);
buffer_start = dpaa2_iova_to_virt(priv->iommu_domain, fd_addr);
@@ -1060,6 +1063,28 @@ static void dpaa2_eth_free_tx_fd(struct dpaa2_eth_priv *priv,
/* Unmap the SGT buffer */
dma_unmap_single(dev, fd_addr, swa->sg.sgt_size,
DMA_BIDIRECTIONAL);
+ } else if (swa->type == DPAA2_ETH_SWA_SW_TSO) {
+ skb = swa->tso.skb;
+
+ sgt = (struct dpaa2_sg_entry *)(buffer_start +
+ priv->tx_data_offset);
+
+ /* Unmap and free the header */
+ dma_unmap_single(dev, dpaa2_sg_get_addr(sgt), TSO_HEADER_SIZE,
+ DMA_TO_DEVICE);
+ kfree(dpaa2_iova_to_virt(priv->iommu_domain, dpaa2_sg_get_addr(sgt)));
+
+ /* Unmap the other SG entries for the data */
+ for (i = 1; i < swa->tso.num_sg; i++)
+ dma_unmap_single(dev, dpaa2_sg_get_addr(&sgt[i]),
+ dpaa2_sg_get_len(&sgt[i]), DMA_TO_DEVICE);
+
+ /* Unmap the SGT buffer */
+ dma_unmap_single(dev, fd_addr, swa->sg.sgt_size,
+ DMA_BIDIRECTIONAL);
+
+ if (!swa->tso.is_last_fd)
+ should_free_skb = 0;
} else {
skb = swa->single.skb;
@@ -1088,26 +1113,172 @@ static void dpaa2_eth_free_tx_fd(struct dpaa2_eth_priv *priv,
}
/* Get the timestamp value */
- if (skb->cb[0] == TX_TSTAMP) {
- struct skb_shared_hwtstamps shhwtstamps;
- __le64 *ts = dpaa2_get_ts(buffer_start, 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);
- } else if (skb->cb[0] == TX_TSTAMP_ONESTEP_SYNC) {
- mutex_unlock(&priv->onestep_tstamp_lock);
+ if (swa->type != DPAA2_ETH_SWA_SW_TSO) {
+ if (skb->cb[0] == TX_TSTAMP) {
+ struct skb_shared_hwtstamps shhwtstamps;
+ __le64 *ts = dpaa2_get_ts(buffer_start, 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);
+ } else if (skb->cb[0] == TX_TSTAMP_ONESTEP_SYNC) {
+ mutex_unlock(&priv->onestep_tstamp_lock);
+ }
}
/* Free SGT buffer allocated on tx */
if (fd_format != dpaa2_fd_single)
dpaa2_eth_sgt_recycle(priv, buffer_start);
- /* Move on with skb release */
- napi_consume_skb(skb, in_napi);
+ /* Move on with skb release. If we are just confirming multiple FDs
+ * from the same TSO skb then only the last one will need to free the
+ * skb.
+ */
+ if (should_free_skb)
+ napi_consume_skb(skb, in_napi);
+}
+
+static int dpaa2_eth_build_gso_fd(struct dpaa2_eth_priv *priv,
+ struct sk_buff *skb, struct dpaa2_fd *fd,
+ int *num_fds, u32 *total_fds_len)
+{
+ struct device *dev = priv->net_dev->dev.parent;
+ int hdr_len, total_len, data_left, fd_len;
+ int num_sge, err, i, sgt_buf_size;
+ struct dpaa2_fd *fd_start = fd;
+ struct dpaa2_sg_entry *sgt;
+ struct dpaa2_eth_swa *swa;
+ dma_addr_t sgt_addr, addr;
+ dma_addr_t tso_hdr_dma;
+ unsigned int index = 0;
+ struct tso_t tso;
+ char *tso_hdr;
+ void *sgt_buf;
+
+ /* Initialize the TSO handler, and prepare the first payload */
+ hdr_len = tso_start(skb, &tso);
+ *total_fds_len = 0;
+
+ total_len = skb->len - hdr_len;
+ while (total_len > 0) {
+ /* Prepare the HW SGT structure for this frame */
+ sgt_buf = dpaa2_eth_sgt_get(priv);
+ if (unlikely(!sgt_buf)) {
+ netdev_err(priv->net_dev, "dpaa2_eth_sgt_get() failed\n");
+ err = -ENOMEM;
+ goto err_sgt_get;
+ }
+ sgt = (struct dpaa2_sg_entry *)(sgt_buf + priv->tx_data_offset);
+
+ /* Determine the data length of this frame */
+ data_left = min_t(int, skb_shinfo(skb)->gso_size, total_len);
+ total_len -= data_left;
+ fd_len = data_left + hdr_len;
+
+ /* Prepare packet headers: MAC + IP + TCP */
+ tso_hdr = kmalloc(TSO_HEADER_SIZE, GFP_ATOMIC);
+ if (!tso_hdr) {
+ err = -ENOMEM;
+ goto err_alloc_tso_hdr;
+ }
+
+ tso_build_hdr(skb, tso_hdr, &tso, data_left, total_len == 0);
+ tso_hdr_dma = dma_map_single(dev, tso_hdr, TSO_HEADER_SIZE, DMA_TO_DEVICE);
+ if (dma_mapping_error(dev, tso_hdr_dma)) {
+ netdev_err(priv->net_dev, "dma_map_single(tso_hdr) failed\n");
+ err = -ENOMEM;
+ goto err_map_tso_hdr;
+ }
+
+ /* Setup the SG entry for the header */
+ dpaa2_sg_set_addr(sgt, tso_hdr_dma);
+ dpaa2_sg_set_len(sgt, hdr_len);
+ dpaa2_sg_set_final(sgt, data_left > 0 ? false : true);
+
+ /* Compose the SG entries for each fragment of data */
+ num_sge = 1;
+ while (data_left > 0) {
+ int size;
+
+ /* Move to the next SG entry */
+ sgt++;
+ size = min_t(int, tso.size, data_left);
+
+ addr = dma_map_single(dev, tso.data, size, DMA_TO_DEVICE);
+ if (dma_mapping_error(dev, addr)) {
+ netdev_err(priv->net_dev, "dma_map_single(tso.data) failed\n");
+ err = -ENOMEM;
+ goto err_map_data;
+ }
+ dpaa2_sg_set_addr(sgt, addr);
+ dpaa2_sg_set_len(sgt, size);
+ dpaa2_sg_set_final(sgt, size == data_left ? true : false);
+
+ num_sge++;
+
+ /* Build the data for the __next__ fragment */
+ data_left -= size;
+ tso_build_data(skb, &tso, size);
+ }
+
+ /* Store the skb backpointer in the SGT buffer */
+ sgt_buf_size = priv->tx_data_offset + num_sge * sizeof(struct dpaa2_sg_entry);
+ swa = (struct dpaa2_eth_swa *)sgt_buf;
+ swa->type = DPAA2_ETH_SWA_SW_TSO;
+ swa->tso.skb = skb;
+ swa->tso.num_sg = num_sge;
+ swa->tso.sgt_size = sgt_buf_size;
+ swa->tso.is_last_fd = total_len == 0 ? 1 : 0;
+
+ /* Separately map the SGT buffer */
+ sgt_addr = dma_map_single(dev, sgt_buf, sgt_buf_size, DMA_BIDIRECTIONAL);
+ if (unlikely(dma_mapping_error(dev, sgt_addr))) {
+ netdev_err(priv->net_dev, "dma_map_single(sgt_buf) failed\n");
+ err = -ENOMEM;
+ goto err_map_sgt;
+ }
+
+ /* Setup the frame descriptor */
+ memset(fd, 0, sizeof(struct dpaa2_fd));
+ dpaa2_fd_set_offset(fd, priv->tx_data_offset);
+ dpaa2_fd_set_format(fd, dpaa2_fd_sg);
+ dpaa2_fd_set_addr(fd, sgt_addr);
+ dpaa2_fd_set_len(fd, fd_len);
+ dpaa2_fd_set_ctrl(fd, FD_CTRL_PTA);
+
+ *total_fds_len += fd_len;
+ /* Advance to the next frame descriptor */
+ fd++;
+ index++;
+ }
+
+ *num_fds = index;
+
+ return 0;
+
+err_map_sgt:
+err_map_data:
+ /* Unmap all the data S/G entries for the current FD */
+ sgt = (struct dpaa2_sg_entry *)(sgt_buf + priv->tx_data_offset);
+ for (i = 1; i < num_sge; i++)
+ dma_unmap_single(dev, dpaa2_sg_get_addr(&sgt[i]),
+ dpaa2_sg_get_len(&sgt[i]), DMA_TO_DEVICE);
+
+ /* Unmap the header entry */
+ dma_unmap_single(dev, tso_hdr_dma, TSO_HEADER_SIZE, DMA_TO_DEVICE);
+err_map_tso_hdr:
+ kfree(tso_hdr);
+err_alloc_tso_hdr:
+ dpaa2_eth_sgt_recycle(priv, sgt_buf);
+err_sgt_get:
+ /* Free all the other FDs that were already fully created */
+ for (i = 0; i < index; i++)
+ dpaa2_eth_free_tx_fd(priv, NULL, &fd_start[i], false);
+
+ return err;
}
static netdev_tx_t __dpaa2_eth_tx(struct sk_buff *skb,
@@ -1123,10 +1294,10 @@ static netdev_tx_t __dpaa2_eth_tx(struct sk_buff *skb,
struct netdev_queue *nq;
struct dpaa2_fd *fd;
u16 queue_mapping;
+ void *swa = NULL;
u8 prio = 0;
int err, i;
u32 fd_len;
- void *swa;
percpu_stats = this_cpu_ptr(priv->percpu_stats);
percpu_extras = this_cpu_ptr(priv->percpu_extras);
@@ -1146,7 +1317,13 @@ static netdev_tx_t __dpaa2_eth_tx(struct sk_buff *skb,
/* Setup the FD fields */
- if (skb_is_nonlinear(skb)) {
+ if (skb_is_gso(skb)) {
+ err = dpaa2_eth_build_gso_fd(priv, skb, fd, &num_fds, &fd_len);
+ percpu_extras->tx_sg_frames += num_fds;
+ percpu_extras->tx_sg_bytes += fd_len;
+ percpu_extras->tx_tso_frames += num_fds;
+ percpu_extras->tx_tso_bytes += fd_len;
+ } else if (skb_is_nonlinear(skb)) {
err = dpaa2_eth_build_sg_fd(priv, skb, fd, &swa);
percpu_extras->tx_sg_frames++;
percpu_extras->tx_sg_bytes += skb->len;
@@ -1168,7 +1345,7 @@ static netdev_tx_t __dpaa2_eth_tx(struct sk_buff *skb,
goto err_build_fd;
}
- if (skb->cb[0])
+ if (swa && skb->cb[0])
dpaa2_eth_enable_tx_tstamp(priv, fd, swa, skb);
/* Tracing point */
@@ -4138,7 +4315,8 @@ static int dpaa2_eth_netdev_init(struct net_device *net_dev)
net_dev->features = NETIF_F_RXCSUM |
NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
NETIF_F_SG | NETIF_F_HIGHDMA |
- NETIF_F_LLTX | NETIF_F_HW_TC;
+ NETIF_F_LLTX | NETIF_F_HW_TC | NETIF_F_TSO;
+ net_dev->gso_max_segs = DPAA2_ETH_ENQUEUE_MAX_FDS;
net_dev->hw_features = net_dev->features;
if (priv->dpni_attrs.vlan_filter_entries)
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.