| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <1485889401-13909-2-git-send-email-isubramanian@apm.com>
Date: Tue, 31 Jan 2017 11:03:16 -0800
From: Iyappan Subramanian <isubramanian@....com>
To: davem@...emloft.net, netdev@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org, patches@....com,
kchudgar@....com, Iyappan Subramanian <isubramanian@....com>
Subject: [PATCH net-next 1/6] drivers: net: xgene-v2: Add DMA descriptor
This patch adds DMA descriptor setup and interrupt enable/disable
functions.
Signed-off-by: Iyappan Subramanian <isubramanian@....com>
Signed-off-by: Keyur Chudgar <kchudgar@....com>
---
drivers/net/ethernet/apm/xgene-v2/main.h | 88 ++++++++++++++++++++++++++++++++
drivers/net/ethernet/apm/xgene-v2/ring.c | 73 ++++++++++++++++++++++++++
drivers/net/ethernet/apm/xgene-v2/ring.h | 77 ++++++++++++++++++++++++++++
3 files changed, 238 insertions(+)
create mode 100644 drivers/net/ethernet/apm/xgene-v2/main.h
create mode 100644 drivers/net/ethernet/apm/xgene-v2/ring.c
create mode 100644 drivers/net/ethernet/apm/xgene-v2/ring.h
diff --git a/drivers/net/ethernet/apm/xgene-v2/main.h b/drivers/net/ethernet/apm/xgene-v2/main.h
new file mode 100644
index 0000000..c8a40af
--- /dev/null
+++ b/drivers/net/ethernet/apm/xgene-v2/main.h
@@ -0,0 +1,88 @@
+/*
+ * Applied Micro X-Gene SoC Ethernet v2 Driver
+ *
+ * Copyright (c) 2017, Applied Micro Circuits Corporation
+ * Author(s): Iyappan Subramanian <isubramanian@....com>
+ * Keyur Chudgar <kchudgar@....com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __XGENE_ENET_V2_MAIN_H__
+#define __XGENE_ENET_V2_MAIN_H__
+
+#include <linux/acpi.h>
+#include <linux/clk.h>
+#include <linux/efi.h>
+#include <linux/if_vlan.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/of_net.h>
+#include <linux/of_mdio.h>
+#include <linux/prefetch.h>
+#include <linux/phy.h>
+#include <net/ip.h>
+#include "mac.h"
+#include "enet.h"
+#include "ring.h"
+
+#define XGENE_ENET_V2_VERSION "v1.0"
+#define XGENE_ENET_STD_MTU 1536
+#define XGENE_ENET_MIN_FRAME 60
+#define IRQ_ID_SIZE 16
+
+struct xge_resource {
+ void __iomem *base_addr;
+ int phy_mode;
+ u32 irq;
+};
+
+struct xge_stats {
+ u64 tx_packets;
+ u64 tx_bytes;
+ u64 rx_packets;
+ u64 rx_bytes;
+};
+
+/* software context of a descriptor ring */
+struct xge_desc_ring {
+ struct net_device *ndev;
+ dma_addr_t dma_addr;
+ u8 head;
+ u8 tail;
+ union {
+ void *desc_addr;
+ struct xge_raw_desc *raw_desc;
+ };
+ struct sk_buff *(*skbs);
+ void *(*pkt_bufs);
+};
+
+/* ethernet private data */
+struct xge_pdata {
+ struct xge_resource resources;
+ struct xge_desc_ring *tx_ring;
+ struct xge_desc_ring *rx_ring;
+ struct platform_device *pdev;
+ char irq_name[IRQ_ID_SIZE];
+ struct net_device *ndev;
+ struct napi_struct napi;
+ struct xge_stats stats;
+ int phy_speed;
+ u8 nbufs;
+};
+
+#endif /* __XGENE_ENET_V2_MAIN_H__ */
diff --git a/drivers/net/ethernet/apm/xgene-v2/ring.c b/drivers/net/ethernet/apm/xgene-v2/ring.c
new file mode 100644
index 0000000..3289bf3
--- /dev/null
+++ b/drivers/net/ethernet/apm/xgene-v2/ring.c
@@ -0,0 +1,73 @@
+/*
+ * Applied Micro X-Gene SoC Ethernet v2 Driver
+ *
+ * Copyright (c) 2017, Applied Micro Circuits Corporation
+ * Author(s): Iyappan Subramanian <isubramanian@....com>
+ * Keyur Chudgar <kchudgar@....com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "main.h"
+
+/* create circular linked list of descriptors */
+void xge_setup_desc(struct xge_desc_ring *ring)
+{
+ struct xge_raw_desc *raw_desc;
+ dma_addr_t dma_h, next_dma;
+ u16 offset;
+ int i;
+
+ for (i = 0; i < XGENE_ENET_NUM_DESC; i++) {
+ raw_desc = &ring->raw_desc[i];
+
+ offset = (i + 1) & (XGENE_ENET_NUM_DESC - 1);
+ next_dma = ring->dma_addr + (offset * XGENE_ENET_DESC_SIZE);
+
+ raw_desc->m0 = cpu_to_le64(SET_BITS(E, 1) |
+ SET_BITS(PKT_SIZE, 0));
+ dma_h = next_dma >> NEXT_DESC_ADDRL_LEN;
+ raw_desc->m1 = cpu_to_le64(SET_BITS(NEXT_DESC_ADDRL, next_dma) |
+ SET_BITS(NEXT_DESC_ADDRL, dma_h));
+ }
+}
+
+void xge_update_tx_desc_addr(struct xge_pdata *pdata)
+{
+ dma_addr_t dma_addr = pdata->tx_ring->dma_addr;
+
+ xge_wr_csr(pdata, DMATXDESCL, dma_addr);
+ xge_wr_csr(pdata, DMATXDESCH, (dma_addr >> NEXT_DESC_ADDRL_LEN));
+}
+
+void xge_update_rx_desc_addr(struct xge_pdata *pdata)
+{
+ dma_addr_t dma_addr = pdata->rx_ring->dma_addr;
+
+ xge_wr_csr(pdata, DMARXDESCL, dma_addr);
+ xge_wr_csr(pdata, DMARXDESCH, (dma_addr >> NEXT_DESC_ADDRL_LEN));
+}
+
+void xge_intr_enable(struct xge_pdata *pdata)
+{
+ u32 data;
+
+ data = RX_PKT_RCVD | TX_PKT_SENT;
+ xge_wr_csr(pdata, DMAINTRMASK, data);
+}
+
+void xge_intr_disable(struct xge_pdata *pdata)
+{
+ xge_wr_csr(pdata, DMAINTRMASK, 0);
+}
diff --git a/drivers/net/ethernet/apm/xgene-v2/ring.h b/drivers/net/ethernet/apm/xgene-v2/ring.h
new file mode 100644
index 0000000..f2711f4
--- /dev/null
+++ b/drivers/net/ethernet/apm/xgene-v2/ring.h
@@ -0,0 +1,77 @@
+/*
+ * Applied Micro X-Gene SoC Ethernet v2 Driver
+ *
+ * Copyright (c) 2017, Applied Micro Circuits Corporation
+ * Author(s): Iyappan Subramanian <isubramanian@....com>
+ * Keyur Chudgar <kchudgar@....com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __XGENE_ENET_V2_RING_H__
+#define __XGENE_ENET_V2_RING_H__
+
+struct xge_desc_ring;
+
+#define XGENE_ENET_DESC_SIZE 64
+#define XGENE_ENET_NUM_DESC 256
+#define NUM_BUFS 8
+
+#define E_POS 63
+#define E_LEN 1
+#define PKT_ADDRL_POS 0
+#define PKT_ADDRL_LEN 32
+#define PKT_ADDRH_POS 32
+#define PKT_ADDRH_LEN 10
+#define PKT_SIZE_POS 32
+#define PKT_SIZE_LEN 12
+#define NEXT_DESC_ADDRL_POS 0
+#define NEXT_DESC_ADDRL_LEN 32
+#define NEXT_DESC_ADDRH_POS 48
+#define NEXT_DESC_ADDRH_LEN 10
+
+struct xge_raw_desc {
+ __le64 m0;
+ __le64 m1;
+ __le64 m2;
+ __le64 m3;
+ __le64 m4;
+ __le64 m5;
+ __le64 m6;
+ __le64 m7;
+};
+
+static inline u64 xge_set_desc_bits(int pos, int len, u64 val)
+{
+ return (val & ((1ULL << len) - 1)) << pos;
+}
+
+static inline u64 xge_get_desc_bits(int pos, int len, u64 src)
+{
+ return (src >> pos) & ((1ULL << len) - 1);
+}
+
+#define SET_BITS(field, val) \
+ xge_set_desc_bits(field ## _POS, field ## _LEN, val)
+
+#define GET_BITS(field, src) \
+ xge_get_desc_bits(field ## _POS, field ## _LEN, src)
+
+void xge_setup_desc(struct xge_desc_ring *ring);
+void xge_update_tx_desc_addr(struct xge_pdata *pdata);
+void xge_update_rx_desc_addr(struct xge_pdata *pdata);
+void xge_intr_enable(struct xge_pdata *pdata);
+void xge_intr_disable(struct xge_pdata *pdata);
+
+#endif /* __XGENE_ENET_V2_RING_H__ */
--
1.9.1
Powered by blists - more mailing lists