From e4defc775424a3501caf98d266a8d7616fa53819 Mon Sep 17 00:00:00 2001 From: David L Stevens Date: Mon, 29 Sep 2014 19:47:59 -0400 Subject: [PATCH] sunvnet: upgrade to VIO protocol version 1.6 This patch upgrades the sunvnet driver to support VIO protocol version 1.6. In particular, it adds per-port MTU negotiation, allowing MTUs other than ETH_FRAMELEN with ports using newer VIO protocol versions. Signed-off-by: David L Stevens Signed-off-by: David S. Miller --- arch/sparc/include/asm/vio.h | 44 +++++++++++- arch/sparc/kernel/viohs.c | 14 +++- drivers/net/ethernet/sun/sunvnet.c | 104 ++++++++++++++++++++++++----- drivers/net/ethernet/sun/sunvnet.h | 3 + 4 files changed, 143 insertions(+), 22 deletions(-) diff --git a/arch/sparc/include/asm/vio.h b/arch/sparc/include/asm/vio.h index e0f6c399f1d0..6b135a8ab07b 100644 --- a/arch/sparc/include/asm/vio.h +++ b/arch/sparc/include/asm/vio.h @@ -65,6 +65,7 @@ struct vio_dring_register { u16 options; #define VIO_TX_DRING 0x0001 #define VIO_RX_DRING 0x0002 +#define VIO_RX_DRING_DATA 0x0004 u16 resv; u32 num_cookies; struct ldc_trans_cookie cookies[0]; @@ -80,6 +81,8 @@ struct vio_dring_unregister { #define VIO_PKT_MODE 0x01 /* Packet based transfer */ #define VIO_DESC_MODE 0x02 /* In-band descriptors */ #define VIO_DRING_MODE 0x03 /* Descriptor rings */ +/* in vers >= 1.2, VIO_DRING_MODE is 0x04 and transfer mode is a bitmask */ +#define VIO_NEW_DRING_MODE 0x04 struct vio_dring_data { struct vio_msg_tag tag; @@ -205,10 +208,20 @@ struct vio_net_attr_info { u8 addr_type; #define VNET_ADDR_ETHERMAC 0x01 u16 ack_freq; - u32 resv1; + u8 plnk_updt; +#define PHYSLINK_UPDATE_NONE 0x00 +#define PHYSLINK_UPDATE_STATE 0x01 +#define PHYSLINK_UPDATE_STATE_ACK 0x02 +#define PHYSLINK_UPDATE_STATE_NACK 0x03 + u8 options; + u16 resv1; u64 addr; u64 mtu; - u64 resv2[3]; + u16 cflags; +#define VNET_LSO_IPV4_CAPAB 0x0001 + u16 ipv4_lso_maxlen; + u32 resv2; + u64 resv3[2]; }; #define VNET_NUM_MCAST 7 @@ -366,6 +379,33 @@ struct vio_driver_state { struct vio_driver_ops *ops; }; +static inline bool vio_version_before(struct vio_driver_state *vio, + u16 major, u16 minor) +{ + u32 have = (u32)vio->ver.major << 16 | vio->ver.minor; + u32 want = (u32)major << 16 | minor; + + return have < want; +} + +static inline bool vio_version_after(struct vio_driver_state *vio, + u16 major, u16 minor) +{ + u32 have = (u32)vio->ver.major << 16 | vio->ver.minor; + u32 want = (u32)major << 16 | minor; + + return have > want; +} + +static inline bool vio_version_after_eq(struct vio_driver_state *vio, + u16 major, u16 minor) +{ + u32 have = (u32)vio->ver.major << 16 | vio->ver.minor; + u32 want = (u32)major << 16 | minor; + + return have >= want; +} + #define viodbg(TYPE, f, a...) \ do { if (vio->debug & VIO_DEBUG_##TYPE) \ printk(KERN_INFO "vio: ID[%lu] " f, \ diff --git a/arch/sparc/kernel/viohs.c b/arch/sparc/kernel/viohs.c index f8e7dd53e1c7..7ef081a185b1 100644 --- a/arch/sparc/kernel/viohs.c +++ b/arch/sparc/kernel/viohs.c @@ -426,6 +426,13 @@ static int process_dreg_info(struct vio_driver_state *vio, if (vio->dr_state & VIO_DR_STATE_RXREG) goto send_nack; + /* v1.6 and higher, ACK with desired, supported mode, or NACK */ + if (vio_version_after_eq(vio, 1, 6)) { + if (!(pkt->options & VIO_TX_DRING)) + goto send_nack; + pkt->options = VIO_TX_DRING; + } + BUG_ON(vio->desc_buf); vio->desc_buf = kzalloc(pkt->descr_size, GFP_ATOMIC); @@ -453,8 +460,11 @@ static int process_dreg_info(struct vio_driver_state *vio, pkt->tag.stype = VIO_SUBTYPE_ACK; pkt->dring_ident = ++dr->ident; - viodbg(HS, "SEND DRING_REG ACK ident[%llx]\n", - (unsigned long long) pkt->dring_ident); + viodbg(HS, "SEND DRING_REG ACK ident[%llx] " + "ndesc[%u] dsz[%u] opt[0x%x] ncookies[%u]\n", + (unsigned long long) pkt->dring_ident, + pkt->num_descr, pkt->descr_size, pkt->options, + pkt->num_cookies); len = (sizeof(*pkt) + (dr->ncookies * sizeof(struct ldc_trans_cookie))); diff --git a/drivers/net/ethernet/sun/sunvnet.c b/drivers/net/ethernet/sun/sunvnet.c index edb860947da4..b1abcadb42ff 100644 --- a/drivers/net/ethernet/sun/sunvnet.c +++ b/drivers/net/ethernet/sun/sunvnet.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include @@ -41,6 +42,7 @@ static int __vnet_tx_trigger(struct vnet_port *port, u32 start); /* Ordered from largest major to lowest */ static struct vio_version vnet_versions[] = { + { .major = 1, .minor = 6 }, { .major = 1, .minor = 0 }, }; @@ -67,6 +69,7 @@ static int vnet_send_attr(struct vio_driver_state *vio) struct vnet_port *port = to_vnet_port(vio); struct net_device *dev = port->vp->dev; struct vio_net_attr_info pkt; + int framelen = ETH_FRAME_LEN; int i; memset(&pkt, 0, sizeof(pkt)); @@ -74,19 +77,41 @@ static int vnet_send_attr(struct vio_driver_state *vio) pkt.tag.stype = VIO_SUBTYPE_INFO; pkt.tag.stype_env = VIO_ATTR_INFO; pkt.tag.sid = vio_send_sid(vio); - pkt.xfer_mode = VIO_DRING_MODE; + if (vio_version_before(vio, 1, 2)) + pkt.xfer_mode = VIO_DRING_MODE; + else + pkt.xfer_mode = VIO_NEW_DRING_MODE; pkt.addr_type = VNET_ADDR_ETHERMAC; pkt.ack_freq = 0; for (i = 0; i < 6; i++) pkt.addr |= (u64)dev->dev_addr[i] << ((5 - i) * 8); - pkt.mtu = ETH_FRAME_LEN; + if (vio_version_after(vio, 1, 3)) { + if (port->rmtu) { + port->rmtu = min(VNET_MAXPACKET, port->rmtu); + pkt.mtu = port->rmtu; + } else { + port->rmtu = VNET_MAXPACKET; + pkt.mtu = port->rmtu; + } + if (vio_version_after_eq(vio, 1, 6)) + pkt.options = VIO_TX_DRING; + } else if (vio_version_before(vio, 1, 3)) { + pkt.mtu = framelen; + } else { /* v1.3 */ + pkt.mtu = framelen + VLAN_HLEN; + } + + pkt.plnk_updt = PHYSLINK_UPDATE_NONE; + pkt.cflags = 0; viodbg(HS, "SEND NET ATTR xmode[0x%x] atype[0x%x] addr[%llx] " - "ackfreq[%u] mtu[%llu]\n", + "ackfreq[%u] plnk_updt[0x%02x] opts[0x%02x] mtu[%llu] " + "cflags[0x%04x] lso_max[%u]\n", pkt.xfer_mode, pkt.addr_type, - (unsigned long long) pkt.addr, - pkt.ack_freq, - (unsigned long long) pkt.mtu); + (unsigned long long)pkt.addr, + pkt.ack_freq, pkt.plnk_updt, pkt.options, + (unsigned long long)pkt.mtu, pkt.cflags, pkt.ipv4_lso_maxlen); + return vio_ldc_send(vio, &pkt, sizeof(pkt)); } @@ -94,18 +119,52 @@ static int vnet_send_attr(struct vio_driver_state *vio) static int handle_attr_info(struct vio_driver_state *vio, struct vio_net_attr_info *pkt) { - viodbg(HS, "GOT NET ATTR INFO xmode[0x%x] atype[0x%x] addr[%llx] " - "ackfreq[%u] mtu[%llu]\n", + struct vnet_port *port = to_vnet_port(vio); + u64 localmtu; + u8 xfer_mode; + + viodbg(HS, "GOT NET ATTR xmode[0x%x] atype[0x%x] addr[%llx] " + "ackfreq[%u] plnk_updt[0x%02x] opts[0x%02x] mtu[%llu] " + " (rmtu[%llu]) cflags[0x%04x] lso_max[%u]\n", pkt->xfer_mode, pkt->addr_type, - (unsigned long long) pkt->addr, - pkt->ack_freq, - (unsigned long long) pkt->mtu); + (unsigned long long)pkt->addr, + pkt->ack_freq, pkt->plnk_updt, pkt->options, + (unsigned long long)pkt->mtu, port->rmtu, pkt->cflags, + pkt->ipv4_lso_maxlen); pkt->tag.sid = vio_send_sid(vio); - if (pkt->xfer_mode != VIO_DRING_MODE || + xfer_mode = pkt->xfer_mode; + /* for version < 1.2, VIO_DRING_MODE = 0x3 and no bitmask */ + if (vio_version_before(vio, 1, 2) && xfer_mode == VIO_DRING_MODE) + xfer_mode = VIO_NEW_DRING_MODE; + + /* MTU negotiation: + * < v1.3 - ETH_FRAME_LEN exactly + * > v1.3 - MIN(pkt.mtu, VNET_MAXPACKET, port->rmtu) and change + * pkt->mtu for ACK + * = v1.3 - ETH_FRAME_LEN + VLAN_HLEN exactly + */ + if (vio_version_before(vio, 1, 3)) { + localmtu = ETH_FRAME_LEN; + } else if (vio_version_after(vio, 1, 3)) { + localmtu = port->rmtu ? port->rmtu : VNET_MAXPACKET; + localmtu = min(pkt->mtu, localmtu); + pkt->mtu = localmtu; + } else { /* v1.3 */ + localmtu = ETH_FRAME_LEN + VLAN_HLEN; + } + port->rmtu = localmtu; + + /* for version >= 1.6, ACK packet mode we support */ + if (vio_version_after_eq(vio, 1, 6)) { + pkt->xfer_mode = VIO_NEW_DRING_MODE; + pkt->options = VIO_TX_DRING; + } + + if (!(xfer_mode | VIO_NEW_DRING_MODE) || pkt->addr_type != VNET_ADDR_ETHERMAC || - pkt->mtu != ETH_FRAME_LEN) { + pkt->mtu != localmtu) { viodbg(HS, "SEND NET ATTR NACK\n"); pkt->tag.stype = VIO_SUBTYPE_NACK; @@ -114,7 +173,14 @@ static int handle_attr_info(struct vio_driver_state *vio, return -ECONNRESET; } else { - viodbg(HS, "SEND NET ATTR ACK\n"); + viodbg(HS, "SEND NET ATTR ACK xmode[0x%x] atype[0x%x] " + "addr[%llx] ackfreq[%u] plnk_updt[0x%02x] opts[0x%02x] " + "mtu[%llu] (rmtu[%llu]) cflags[0x%04x] lso_max[%u]\n", + pkt->xfer_mode, pkt->addr_type, + (unsigned long long)pkt->addr, + pkt->ack_freq, pkt->plnk_updt, pkt->options, + (unsigned long long)pkt->mtu, port->rmtu, pkt->cflags, + pkt->ipv4_lso_maxlen); pkt->tag.stype = VIO_SUBTYPE_ACK; @@ -210,7 +276,7 @@ static int vnet_rx_one(struct vnet_port *port, unsigned int len, int err; err = -EMSGSIZE; - if (unlikely(len < ETH_ZLEN || len > ETH_FRAME_LEN)) { + if (unlikely(len < ETH_ZLEN || len > port->rmtu)) { dev->stats.rx_length_errors++; goto out_dropped; } @@ -558,8 +624,10 @@ static void vnet_event(void *arg, int event) vio_link_state_change(vio, event); spin_unlock_irqrestore(&vio->lock, flags); - if (event == LDC_EVENT_RESET) + if (event == LDC_EVENT_RESET) { + port->rmtu = 0; vio_port_up(vio); + } return; } @@ -1051,8 +1119,8 @@ static int vnet_port_alloc_tx_bufs(struct vnet_port *port) void *dring; for (i = 0; i < VNET_TX_RING_SIZE; i++) { - void *buf = kzalloc(ETH_FRAME_LEN + 8, GFP_KERNEL); - int map_len = (ETH_FRAME_LEN + 7) & ~7; + void *buf = kzalloc(VNET_MAXPACKET + 8, GFP_KERNEL); + int map_len = (VNET_MAXPACKET + 7) & ~7; err = -ENOMEM; if (!buf) diff --git a/drivers/net/ethernet/sun/sunvnet.h b/drivers/net/ethernet/sun/sunvnet.h index da4933750d06..986e04b9313d 100644 --- a/drivers/net/ethernet/sun/sunvnet.h +++ b/drivers/net/ethernet/sun/sunvnet.h @@ -11,6 +11,7 @@ */ #define VNET_TX_TIMEOUT (5 * HZ) +#define VNET_MAXPACKET 1518ULL /* ETH_FRAMELEN + VLAN_HDR */ #define VNET_TX_RING_SIZE 512 #define VNET_TX_WAKEUP_THRESH(dr) ((dr)->pending / 4) @@ -44,6 +45,8 @@ struct vnet_port { u32 stop_rx_idx; bool stop_rx; bool start_cons; + + u64 rmtu; }; static inline struct vnet_port *to_vnet_port(struct vio_driver_state *vio) -- 2.20.1