[PATCH net-next 2/4] drivers: net: xgene: Add support for RSS
Iyappan Subramanian
isubramanian at apm.com
Tue Feb 2 23:55:14 PST 2016
Signed-off-by: Iyappan Subramanian <isubramanian at apm.com>
Signed-off-by: Khuong Dinh <kdinh at apm.com>
Signed-off-by: Tanmay Inamdar <tinamdar at apm.com>
Tested-by: Toan Le <toanle at apm.com>
---
drivers/net/ethernet/apm/xgene/xgene_enet_cle.c | 386 +++++++++++++++++++++++-
drivers/net/ethernet/apm/xgene/xgene_enet_cle.h | 52 ++++
2 files changed, 433 insertions(+), 5 deletions(-)
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_cle.c b/drivers/net/ethernet/apm/xgene/xgene_enet_cle.c
index 7eea982..d51268f 100644
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_cle.c
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_cle.c
@@ -21,6 +21,25 @@
#include "xgene_enet_main.h"
+/* interfaces to convert structures to HW recognized bit formats */
+static void xgene_cle_sband_to_hw(u8 frag, enum xgene_cle_prot_version ver,
+ enum xgene_cle_prot_type type, u32 len,
+ u32 *reg)
+{
+ *reg = XGENE_CLE_RSS_WR(SB_IPFRAG, frag) |
+ XGENE_CLE_RSS_WR(SB_IPPROT, type) |
+ XGENE_CLE_RSS_WR(SB_IPVER, ver) |
+ XGENE_CLE_RSS_WR(SB_HDRLEN, len);
+}
+
+static void xgene_cle_idt_to_hw(u32 dstqid, u32 fpsel,
+ u32 nfpsel, u32 *idt_reg)
+{
+ *idt_reg = XGENE_CLE_RSS_WR(IDT_DSTQID, dstqid) |
+ XGENE_CLE_RSS_WR(IDT_FPSEL, fpsel) |
+ XGENE_CLE_RSS_WR(IDT_NFPSEL, nfpsel);
+}
+
static void xgene_cle_dbptr_to_hw(struct xgene_enet_pdata *pdata,
struct xgene_cle_dbptr *dbptr, u32 *buf)
{
@@ -258,29 +277,372 @@ static void xgene_cle_setup_def_dbptr(struct xgene_enet_pdata *pdata,
}
}
+static int xgene_cle_set_rss_sband(struct xgene_enet_cle *cle)
+{
+ u32 sband, reg = 0;
+ u32 idx = CLE_PKTRAM_SIZE / sizeof(u32);
+ u32 mac_hdr_len = 14;
+ u32 ipv4_ihl = 5;
+ u32 hdr_len;
+ int ret;
+
+ /* Sideband: IPV4/TCP packets */
+ hdr_len = (mac_hdr_len << 5) | ipv4_ihl;
+ xgene_cle_sband_to_hw(0, XGENE_CLE_IPV4, XGENE_CLE_TCP, hdr_len, ®);
+ sband = reg;
+
+ /* Sideband: IPv4/UDP packets */
+ hdr_len = (mac_hdr_len << 5) | ipv4_ihl;
+ xgene_cle_sband_to_hw(1, XGENE_CLE_IPV4, XGENE_CLE_UDP, hdr_len, ®);
+ sband |= (reg << 16);
+
+ ret = xgene_cle_dram_wr(cle, &sband, 1, idx, PKT_RAM, CLE_CMD_WR);
+ if (ret)
+ return ret;
+
+ /* Sideband: IPv4/RAW packets */
+ hdr_len = (mac_hdr_len << 5) | ipv4_ihl;
+ xgene_cle_sband_to_hw(0, XGENE_CLE_IPV4, XGENE_CLE_OTHER,
+ hdr_len, ®);
+ sband = reg;
+
+ /* Sideband: Ethernet II/RAW packets */
+ hdr_len = (mac_hdr_len << 5);
+ xgene_cle_sband_to_hw(0, XGENE_CLE_IPV4, XGENE_CLE_OTHER,
+ hdr_len, ®);
+ sband |= (reg << 16);
+
+ ret = xgene_cle_dram_wr(cle, &sband, 1, idx + 1, PKT_RAM, CLE_CMD_WR);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int xgene_cle_set_rss_skeys(struct xgene_enet_cle *cle)
+{
+ int ret = 0;
+ u32 secret_key_ipv4[4]; /* 16 Bytes*/
+
+ get_random_bytes(secret_key_ipv4, 16);
+ ret = xgene_cle_dram_wr(cle, secret_key_ipv4, 4, 0,
+ RSS_IPV4_HASH_SKEY, CLE_CMD_WR);
+ return ret;
+}
+
+static int xgene_cle_set_rss_idt(struct xgene_enet_pdata *pdata)
+{
+ int i, ret = 0;
+ u32 fpsel, dstqid, nfpsel, idt_reg;
+ u16 pool_id;
+
+ for (i = 0; i < XGENE_CLE_IDT_ENTRIES; i++) {
+ pool_id = pdata->rx_ring->buf_pool->id;
+ fpsel = xgene_enet_ring_bufnum(pool_id) - 0x20;
+ dstqid = xgene_enet_dst_ring_num(pdata->rx_ring);
+ nfpsel = 0;
+ idt_reg = 0;
+
+ xgene_cle_idt_to_hw(dstqid, fpsel, nfpsel, &idt_reg);
+ ret = xgene_cle_dram_wr(&pdata->cle, &idt_reg, 1, i,
+ RSS_IDT, CLE_CMD_WR);
+ if (ret)
+ return ret;
+ }
+
+ ret = xgene_cle_set_rss_skeys(&pdata->cle);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int xgene_cle_setup_rss(struct xgene_enet_pdata *pdata)
+{
+ struct xgene_enet_cle *cle = &pdata->cle;
+ void __iomem *base = cle->base;
+ u32 offset, val = 0;
+ int i, ret = 0;
+
+ offset = CLE_PORT_OFFSET;
+ for (i = 0; i < cle->parsers; i++) {
+ if (cle->active_parser != PARSER_ALL)
+ offset = cle->active_parser * CLE_PORT_OFFSET;
+ else
+ offset = i * CLE_PORT_OFFSET;
+
+ /* enable RSS */
+ val = (RSS_IPV4_12B << 1) | 0x1;
+ writel(val, base + RSS_CTRL0 + offset);
+ }
+
+ /* setup sideband data */
+ ret = xgene_cle_set_rss_sband(cle);
+ if (ret)
+ return ret;
+
+ /* setup indirection table */
+ ret = xgene_cle_set_rss_idt(pdata);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
static int xgene_enet_cle_init(struct xgene_enet_pdata *pdata)
{
struct xgene_enet_cle *enet_cle = &pdata->cle;
struct xgene_cle_ptree *ptree = &enet_cle->ptree;
struct xgene_cle_dbptr dbptr[DB_MAX_PTRS];
struct xgene_cle_ptree_kn kn;
+ struct xgene_cle_ptree_branch *br;
u32 def_qid, def_fpsel, pool_id;
+ int ret;
struct xgene_cle_ptree_ewdn ptree_dn[] = {
{
/* PKT_TYPE_NODE */
.node_type = EWDN,
.last_node = 0,
- .hdr_len_store = 0,
+ .hdr_len_store = 1,
.hdr_extn = NO_BYTE,
.byte_store = NO_BYTE,
.search_byte_store = NO_BYTE,
.result_pointer = DB_RES_DROP,
- .num_branches = 1,
+ .num_branches = 2,
.branch = {
{
- /* Allow all packet type */
+ /* IPV4 */
.valid = 0,
- .next_packet_pointer = 0,
+ .next_packet_pointer = 22,
+ .jump_bw = JMP_FW,
+ .jump_rel = JMP_ABS,
+ .operation = EQT,
+ .next_node = PKT_PROT_NODE,
+ .next_branch = 0,
+ .data = 0x8,
+ .mask = 0xffff
+ },
+ {
+ .valid = 0,
+ .next_packet_pointer = 262,
+ .jump_bw = JMP_FW,
+ .jump_rel = JMP_ABS,
+ .operation = EQT,
+ .next_node = LAST_NODE,
+ .next_branch = 0,
+ .data = 0x0,
+ .mask = 0xffff
+ }
+ },
+ },
+ {
+ /* PKT_PROT_NODE */
+ .node_type = EWDN,
+ .last_node = 0,
+ .hdr_len_store = 1,
+ .hdr_extn = NO_BYTE,
+ .byte_store = NO_BYTE,
+ .search_byte_store = NO_BYTE,
+ .result_pointer = DB_RES_DROP,
+ .num_branches = 3,
+ .branch = {
+ {
+ /* TCP */
+ .valid = 1,
+ .next_packet_pointer = 26,
+ .jump_bw = JMP_FW,
+ .jump_rel = JMP_ABS,
+ .operation = EQT,
+ .next_node = RSS_IPV4_TCP_NODE,
+ .next_branch = 0,
+ .data = 0x0600,
+ .mask = 0xffff
+ },
+ {
+ /* UDP */
+ .valid = 1,
+ .next_packet_pointer = 26,
+ .jump_bw = JMP_FW,
+ .jump_rel = JMP_ABS,
+ .operation = EQT,
+ .next_node = RSS_IPV4_UDP_NODE,
+ .next_branch = 0,
+ .data = 0x1100,
+ .mask = 0xffff
+ },
+ {
+ .valid = 0,
+ .next_packet_pointer = 260,
+ .jump_bw = JMP_FW,
+ .jump_rel = JMP_ABS,
+ .operation = EQT,
+ .next_node = LAST_NODE,
+ .next_branch = 0,
+ .data = 0x0,
+ .mask = 0xffff
+ }
+ }
+ },
+ {
+ /* RSS_IPV4_TCP_NODE */
+ .node_type = EWDN,
+ .last_node = 0,
+ .hdr_len_store = 1,
+ .hdr_extn = NO_BYTE,
+ .byte_store = NO_BYTE,
+ .search_byte_store = BOTH_BYTES,
+ .result_pointer = DB_RES_DROP,
+ .num_branches = 6,
+ .branch = {
+ {
+ /* SRC IPV4 B01 */
+ .valid = 0,
+ .next_packet_pointer = 28,
+ .jump_bw = JMP_FW,
+ .jump_rel = JMP_ABS,
+ .operation = EQT,
+ .next_node = RSS_IPV4_TCP_NODE,
+ .next_branch = 1,
+ .data = 0x0,
+ .mask = 0xffff
+ },
+ {
+ /* SRC IPV4 B23 */
+ .valid = 0,
+ .next_packet_pointer = 30,
+ .jump_bw = JMP_FW,
+ .jump_rel = JMP_ABS,
+ .operation = EQT,
+ .next_node = RSS_IPV4_TCP_NODE,
+ .next_branch = 2,
+ .data = 0x0,
+ .mask = 0xffff
+ },
+ {
+ /* DST IPV4 B01 */
+ .valid = 0,
+ .next_packet_pointer = 32,
+ .jump_bw = JMP_FW,
+ .jump_rel = JMP_ABS,
+ .operation = EQT,
+ .next_node = RSS_IPV4_TCP_NODE,
+ .next_branch = 3,
+ .data = 0x0,
+ .mask = 0xffff
+ },
+ {
+ /* DST IPV4 B23 */
+ .valid = 0,
+ .next_packet_pointer = 34,
+ .jump_bw = JMP_FW,
+ .jump_rel = JMP_ABS,
+ .operation = EQT,
+ .next_node = RSS_IPV4_TCP_NODE,
+ .next_branch = 4,
+ .data = 0x0,
+ .mask = 0xffff
+ },
+ {
+ /* TCP SRC Port */
+ .valid = 0,
+ .next_packet_pointer = 36,
+ .jump_bw = JMP_FW,
+ .jump_rel = JMP_ABS,
+ .operation = EQT,
+ .next_node = RSS_IPV4_TCP_NODE,
+ .next_branch = 5,
+ .data = 0x0,
+ .mask = 0xffff
+ },
+ {
+ /* TCP DST Port */
+ .valid = 0,
+ .next_packet_pointer = 256,
+ .jump_bw = JMP_FW,
+ .jump_rel = JMP_ABS,
+ .operation = EQT,
+ .next_node = LAST_NODE,
+ .next_branch = 0,
+ .data = 0x0,
+ .mask = 0xffff
+ }
+ }
+ },
+ {
+ /* RSS_IPV4_UDP_NODE */
+ .node_type = EWDN,
+ .last_node = 0,
+ .hdr_len_store = 1,
+ .hdr_extn = NO_BYTE,
+ .byte_store = NO_BYTE,
+ .search_byte_store = BOTH_BYTES,
+ .result_pointer = DB_RES_DROP,
+ .num_branches = 6,
+ .branch = {
+ {
+ /* SRC IPV4 B01 */
+ .valid = 0,
+ .next_packet_pointer = 28,
+ .jump_bw = JMP_FW,
+ .jump_rel = JMP_ABS,
+ .operation = EQT,
+ .next_node = RSS_IPV4_UDP_NODE,
+ .next_branch = 1,
+ .data = 0x0,
+ .mask = 0xffff
+ },
+ {
+ /* SRC IPV4 B23 */
+ .valid = 0,
+ .next_packet_pointer = 30,
+ .jump_bw = JMP_FW,
+ .jump_rel = JMP_ABS,
+ .operation = EQT,
+ .next_node = RSS_IPV4_UDP_NODE,
+ .next_branch = 2,
+ .data = 0x0,
+ .mask = 0xffff
+ },
+ {
+ /* DST IPV4 B01 */
+ .valid = 0,
+ .next_packet_pointer = 32,
+ .jump_bw = JMP_FW,
+ .jump_rel = JMP_ABS,
+ .operation = EQT,
+ .next_node = RSS_IPV4_UDP_NODE,
+ .next_branch = 3,
+ .data = 0x0,
+ .mask = 0xffff
+ },
+ {
+ /* DST IPV4 B23 */
+ .valid = 0,
+ .next_packet_pointer = 34,
+ .jump_bw = JMP_FW,
+ .jump_rel = JMP_ABS,
+ .operation = EQT,
+ .next_node = RSS_IPV4_UDP_NODE,
+ .next_branch = 4,
+ .data = 0x0,
+ .mask = 0xffff
+ },
+ {
+ /* TCP SRC Port */
+ .valid = 0,
+ .next_packet_pointer = 36,
+ .jump_bw = JMP_FW,
+ .jump_rel = JMP_ABS,
+ .operation = EQT,
+ .next_node = RSS_IPV4_UDP_NODE,
+ .next_branch = 5,
+ .data = 0x0,
+ .mask = 0xffff
+ },
+ {
+ /* TCP DST Port */
+ .valid = 0,
+ .next_packet_pointer = 256,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
@@ -295,7 +657,7 @@ static int xgene_enet_cle_init(struct xgene_enet_pdata *pdata)
/* LAST NODE */
.node_type = EWDN,
.last_node = 1,
- .hdr_len_store = 0,
+ .hdr_len_store = 1,
.hdr_extn = NO_BYTE,
.byte_store = NO_BYTE,
.search_byte_store = NO_BYTE,
@@ -318,6 +680,20 @@ static int xgene_enet_cle_init(struct xgene_enet_pdata *pdata)
};
ptree->start_pkt = 12; /* Ethertype */
+ if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) {
+ ret = xgene_cle_setup_rss(pdata);
+ if (ret) {
+ netdev_err(pdata->ndev, "RSS initialization failed\n");
+ return ret;
+ }
+ } else {
+ br = &ptree_dn[PKT_PROT_NODE].branch[0];
+ br->valid = 0;
+ br->next_packet_pointer = 260;
+ br->next_node = NEXT_NODE(LAST_NODE);
+ br->data = 0x0000;
+ br->mask = 0xffff;
+ }
def_qid = xgene_enet_dst_ring_num(pdata->rx_ring);
pool_id = pdata->rx_ring->buf_pool->id;
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_cle.h b/drivers/net/ethernet/apm/xgene/xgene_enet_cle.h
index 9696a57..a12ac8c 100644
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_cle.h
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_cle.h
@@ -34,6 +34,7 @@
#define SPPTR0 0x0104
#define DFCLSRESDBPTR0 0x0108
#define DFCLSRESDB00 0x010c
+#define RSS_CTRL0 0x0000013c
#define CLE_CMD_TO 10 /* ms */
#define CLE_PKTRAM_SIZE 256 /* bytes */
@@ -108,6 +109,9 @@
enum xgene_cle_ptree_nodes {
PKT_TYPE_NODE,
+ PKT_PROT_NODE,
+ RSS_IPV4_TCP_NODE,
+ RSS_IPV4_UDP_NODE,
LAST_NODE,
MAX_NODES
};
@@ -147,6 +151,8 @@ enum xgene_cle_parser {
#define XGENE_CLE_DRAM(type) (((type) & 0xf) << 28)
enum xgene_cle_dram_type {
PKT_RAM,
+ RSS_IDT,
+ RSS_IPV4_HASH_SKEY,
PTREE_RAM = 0xc,
AVL_RAM,
DB_RAM
@@ -160,6 +166,22 @@ enum xgene_cle_cmd_type {
CLE_CMD_AVL_SRCH = 32
};
+enum xgene_cle_ipv4_rss_hashtype {
+ RSS_IPV4_8B,
+ RSS_IPV4_12B,
+};
+
+enum xgene_cle_prot_type {
+ XGENE_CLE_TCP,
+ XGENE_CLE_UDP,
+ XGENE_CLE_ESP,
+ XGENE_CLE_OTHER
+};
+
+enum xgene_cle_prot_version {
+ XGENE_CLE_IPV4,
+};
+
enum xgene_cle_ptree_dbptrs {
DB_RES_DROP,
DB_RES_DEF,
@@ -167,6 +189,36 @@ enum xgene_cle_ptree_dbptrs {
DB_MAX_PTRS
};
+/* RSS sideband signal info */
+#define XGENE_CLE_SB_IPFRAG_WIDTH 1
+#define XGENE_CLE_SB_IPFRAG_SHIFT 0
+#define XGENE_CLE_SB_IPPROT_WIDTH 2
+#define XGENE_CLE_SB_IPPROT_SHIFT 1
+#define XGENE_CLE_SB_IPVER_WIDTH 1
+#define XGENE_CLE_SB_IPVER_SHIFT 3
+#define XGENE_CLE_SB_HDRLEN_WIDTH 12
+#define XGENE_CLE_SB_HDRLEN_SHIFT 4
+
+/* RSS indirection table */
+#define XGENE_CLE_IDT_ENTRIES 128
+#define XGENE_CLE_IDT_DSTQID_WIDTH 12
+#define XGENE_CLE_IDT_DSTQID_SHIFT 0
+#define XGENE_CLE_IDT_FPSEL_WIDTH 4
+#define XGENE_CLE_IDT_FPSEL_SHIFT 12
+#define XGENE_CLE_IDT_NFPSEL_WIDTH 4
+#define XGENE_CLE_IDT_NFPSEL_SHIFT 16
+
+/* RSS access macros */
+#define XGENE_CLE_RSS_MASK(field) (((2 << \
+ (XGENE_CLE_##field##_WIDTH - 1)) - 1) \
+ << XGENE_CLE_##field##_SHIFT)
+#define XGENE_CLE_RSS_RD(field, word) (((word) & \
+ XGENE_CLE_RSS_MASK(field)) >> \
+ XGENE_CLE_##field##_SHIFT)
+#define XGENE_CLE_RSS_WR(field, word) (((word) << \
+ XGENE_CLE_##field##_SHIFT) & \
+ XGENE_CLE_RSS_MASK(field))
+
struct xgene_cle_ptree_branch {
bool valid;
u16 next_packet_pointer;
--
1.9.1
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