Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

3 files changed, 99 insertions, 4 deletions

diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
index d8e568f6caf3..ccfe52a50a66 100644
--- a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
+++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
@@ -2180,8 +2180,10 @@ static int dpaa_a050385_wa_xdpf(struct dpaa_priv *priv,
 				struct xdp_frame **init_xdpf)
 {
 	struct xdp_frame *new_xdpf, *xdpf = *init_xdpf;
-	void *new_buff;
+	void *new_buff, *aligned_data;
 	struct page *p;
+	u32 data_shift;
+	int headroom;
 
 	/* Check the data alignment and make sure the headroom is large
 	 * enough to store the xdpf backpointer. Use an aligned headroom
@@ -2191,25 +2193,57 @@ static int dpaa_a050385_wa_xdpf(struct dpaa_priv *priv,
 	 * byte frame headroom. If the XDP program uses all of it, copy the
 	 * data to a new buffer and make room for storing the backpointer.
 	 */
-	if (PTR_IS_ALIGNED(xdpf->data, DPAA_A050385_ALIGN) &&
+	if (PTR_IS_ALIGNED(xdpf->data, DPAA_FD_DATA_ALIGNMENT) &&
 	    xdpf->headroom >= priv->tx_headroom) {
 		xdpf->headroom = priv->tx_headroom;
 		return 0;
 	}
 
+	/* Try to move the data inside the buffer just enough to align it and
+	 * store the xdpf backpointer. If the available headroom isn't large
+	 * enough, resort to allocating a new buffer and copying the data.
+	 */
+	aligned_data = PTR_ALIGN_DOWN(xdpf->data, DPAA_FD_DATA_ALIGNMENT);
+	data_shift = xdpf->data - aligned_data;
+
+	/* The XDP frame's headroom needs to be large enough to accommodate
+	 * shifting the data as well as storing the xdpf backpointer.
+	 */
+	if (xdpf->headroom  >= data_shift + priv->tx_headroom) {
+		memmove(aligned_data, xdpf->data, xdpf->len);
+		xdpf->data = aligned_data;
+		xdpf->headroom = priv->tx_headroom;
+		return 0;
+	}
+
+	/* The new xdp_frame is stored in the new buffer. Reserve enough space
+	 * in the headroom for storing it along with the driver's private
+	 * info. The headroom needs to be aligned to DPAA_FD_DATA_ALIGNMENT to
+	 * guarantee the data's alignment in the buffer.
+	 */
+	headroom = ALIGN(sizeof(*new_xdpf) + priv->tx_headroom,
+			 DPAA_FD_DATA_ALIGNMENT);
+
+	/* Assure the extended headroom and data don't overflow the buffer,
+	 * while maintaining the mandatory tailroom.
+	 */
+	if (headroom + xdpf->len > DPAA_BP_RAW_SIZE -
+			SKB_DATA_ALIGN(sizeof(struct skb_shared_info)))
+		return -ENOMEM;
+
 	p = dev_alloc_pages(0);
 	if (unlikely(!p))
 		return -ENOMEM;
 
 	/* Copy the data to the new buffer at a properly aligned offset */
 	new_buff = page_address(p);
-	memcpy(new_buff + priv->tx_headroom, xdpf->data, xdpf->len);
+	memcpy(new_buff + headroom, xdpf->data, xdpf->len);
 
 	/* Create an XDP frame around the new buffer in a similar fashion
 	 * to xdp_convert_buff_to_frame.
 	 */
 	new_xdpf = new_buff;
-	new_xdpf->data = new_buff + priv->tx_headroom;
+	new_xdpf->data = new_buff + headroom;
 	new_xdpf->len = xdpf->len;
 	new_xdpf->headroom = priv->tx_headroom;
 	new_xdpf->frame_sz = DPAA_BP_RAW_SIZE;
diff --git a/drivers/net/ethernet/freescale/enetc/enetc_hw.h b/drivers/net/ethernet/freescale/enetc/enetc_hw.h
index e1e950d48c92..c71fe8d751d5 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc_hw.h
+++ b/drivers/net/ethernet/freescale/enetc/enetc_hw.h
@@ -196,6 +196,8 @@ enum enetc_bdr_type {TX, RX};
 #define ENETC_CBS_BW_MASK	GENMASK(6, 0)
 #define ENETC_PTCCBSR1(n)	(0x1114 + (n) * 8) /* n = 0 to 7*/
 #define ENETC_RSSHASH_KEY_SIZE	40
+#define ENETC_PRSSCAPR		0x1404
+#define ENETC_PRSSCAPR_GET_NUM_RSS(val)	(BIT((val) & 0xf) * 32)
 #define ENETC_PRSSK(n)		(0x1410 + (n) * 4) /* n = [0..9] */
 #define ENETC_PSIVLANFMR	0x1700
 #define ENETC_PSIVLANFMR_VS	BIT(0)
diff --git a/drivers/net/ethernet/freescale/enetc/enetc_pf.c b/drivers/net/ethernet/freescale/enetc/enetc_pf.c
index ed8fcb8b486e..3eb5f1375bd4 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc_pf.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc_pf.c
@@ -996,6 +996,51 @@ static void enetc_phylink_destroy(struct enetc_ndev_priv *priv)
 		phylink_destroy(priv->phylink);
 }
 
+/* Initialize the entire shared memory for the flow steering entries
+ * of this port (PF + VFs)
+ */
+static int enetc_init_port_rfs_memory(struct enetc_si *si)
+{
+	struct enetc_cmd_rfse rfse = {0};
+	struct enetc_hw *hw = &si->hw;
+	int num_rfs, i, err = 0;
+	u32 val;
+
+	val = enetc_port_rd(hw, ENETC_PRFSCAPR);
+	num_rfs = ENETC_PRFSCAPR_GET_NUM_RFS(val);
+
+	for (i = 0; i < num_rfs; i++) {
+		err = enetc_set_fs_entry(si, &rfse, i);
+		if (err)
+			break;
+	}
+
+	return err;
+}
+
+static int enetc_init_port_rss_memory(struct enetc_si *si)
+{
+	struct enetc_hw *hw = &si->hw;
+	int num_rss, err;
+	int *rss_table;
+	u32 val;
+
+	val = enetc_port_rd(hw, ENETC_PRSSCAPR);
+	num_rss = ENETC_PRSSCAPR_GET_NUM_RSS(val);
+	if (!num_rss)
+		return 0;
+
+	rss_table = kcalloc(num_rss, sizeof(*rss_table), GFP_KERNEL);
+	if (!rss_table)
+		return -ENOMEM;
+
+	err = enetc_set_rss_table(si, rss_table, num_rss);
+
+	kfree(rss_table);
+
+	return err;
+}
+
 static int enetc_pf_probe(struct pci_dev *pdev,
 			  const struct pci_device_id *ent)
 {
@@ -1051,6 +1096,18 @@ static int enetc_pf_probe(struct pci_dev *pdev,
 		goto err_alloc_si_res;
 	}
 
+	err = enetc_init_port_rfs_memory(si);
+	if (err) {
+		dev_err(&pdev->dev, "Failed to initialize RFS memory\n");
+		goto err_init_port_rfs;
+	}
+
+	err = enetc_init_port_rss_memory(si);
+	if (err) {
+		dev_err(&pdev->dev, "Failed to initialize RSS memory\n");
+		goto err_init_port_rss;
+	}
+
 	err = enetc_alloc_msix(priv);
 	if (err) {
 		dev_err(&pdev->dev, "MSIX alloc failed\n");
@@ -1079,6 +1136,8 @@ err_phylink_create:
 	enetc_mdiobus_destroy(pf);
 err_mdiobus_create:
 	enetc_free_msix(priv);
+err_init_port_rss:
+err_init_port_rfs:
 err_alloc_msix:
 	enetc_free_si_resources(priv);
 err_alloc_si_res: