Commit e4defc77 authored by David L Stevens's avatar David L Stevens Committed by David S. Miller

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: default avatarDavid L Stevens <david.stevens@oracle.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent a12a601e
...@@ -65,6 +65,7 @@ struct vio_dring_register { ...@@ -65,6 +65,7 @@ struct vio_dring_register {
u16 options; u16 options;
#define VIO_TX_DRING 0x0001 #define VIO_TX_DRING 0x0001
#define VIO_RX_DRING 0x0002 #define VIO_RX_DRING 0x0002
#define VIO_RX_DRING_DATA 0x0004
u16 resv; u16 resv;
u32 num_cookies; u32 num_cookies;
struct ldc_trans_cookie cookies[0]; struct ldc_trans_cookie cookies[0];
...@@ -80,6 +81,8 @@ struct vio_dring_unregister { ...@@ -80,6 +81,8 @@ struct vio_dring_unregister {
#define VIO_PKT_MODE 0x01 /* Packet based transfer */ #define VIO_PKT_MODE 0x01 /* Packet based transfer */
#define VIO_DESC_MODE 0x02 /* In-band descriptors */ #define VIO_DESC_MODE 0x02 /* In-band descriptors */
#define VIO_DRING_MODE 0x03 /* Descriptor rings */ #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_dring_data {
struct vio_msg_tag tag; struct vio_msg_tag tag;
...@@ -205,10 +208,20 @@ struct vio_net_attr_info { ...@@ -205,10 +208,20 @@ struct vio_net_attr_info {
u8 addr_type; u8 addr_type;
#define VNET_ADDR_ETHERMAC 0x01 #define VNET_ADDR_ETHERMAC 0x01
u16 ack_freq; 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 addr;
u64 mtu; 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 #define VNET_NUM_MCAST 7
...@@ -366,6 +379,33 @@ struct vio_driver_state { ...@@ -366,6 +379,33 @@ struct vio_driver_state {
struct vio_driver_ops *ops; 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...) \ #define viodbg(TYPE, f, a...) \
do { if (vio->debug & VIO_DEBUG_##TYPE) \ do { if (vio->debug & VIO_DEBUG_##TYPE) \
printk(KERN_INFO "vio: ID[%lu] " f, \ printk(KERN_INFO "vio: ID[%lu] " f, \
......
...@@ -426,6 +426,13 @@ static int process_dreg_info(struct vio_driver_state *vio, ...@@ -426,6 +426,13 @@ static int process_dreg_info(struct vio_driver_state *vio,
if (vio->dr_state & VIO_DR_STATE_RXREG) if (vio->dr_state & VIO_DR_STATE_RXREG)
goto send_nack; 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); BUG_ON(vio->desc_buf);
vio->desc_buf = kzalloc(pkt->descr_size, GFP_ATOMIC); vio->desc_buf = kzalloc(pkt->descr_size, GFP_ATOMIC);
...@@ -453,8 +460,11 @@ static int process_dreg_info(struct vio_driver_state *vio, ...@@ -453,8 +460,11 @@ static int process_dreg_info(struct vio_driver_state *vio,
pkt->tag.stype = VIO_SUBTYPE_ACK; pkt->tag.stype = VIO_SUBTYPE_ACK;
pkt->dring_ident = ++dr->ident; pkt->dring_ident = ++dr->ident;
viodbg(HS, "SEND DRING_REG ACK ident[%llx]\n", viodbg(HS, "SEND DRING_REG ACK ident[%llx] "
(unsigned long long) pkt->dring_ident); "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) + len = (sizeof(*pkt) +
(dr->ncookies * sizeof(struct ldc_trans_cookie))); (dr->ncookies * sizeof(struct ldc_trans_cookie)));
......
...@@ -15,6 +15,7 @@ ...@@ -15,6 +15,7 @@
#include <linux/ethtool.h> #include <linux/ethtool.h>
#include <linux/etherdevice.h> #include <linux/etherdevice.h>
#include <linux/mutex.h> #include <linux/mutex.h>
#include <linux/if_vlan.h>
#include <asm/vio.h> #include <asm/vio.h>
#include <asm/ldc.h> #include <asm/ldc.h>
...@@ -41,6 +42,7 @@ static int __vnet_tx_trigger(struct vnet_port *port, u32 start); ...@@ -41,6 +42,7 @@ static int __vnet_tx_trigger(struct vnet_port *port, u32 start);
/* Ordered from largest major to lowest */ /* Ordered from largest major to lowest */
static struct vio_version vnet_versions[] = { static struct vio_version vnet_versions[] = {
{ .major = 1, .minor = 6 },
{ .major = 1, .minor = 0 }, { .major = 1, .minor = 0 },
}; };
...@@ -67,6 +69,7 @@ static int vnet_send_attr(struct vio_driver_state *vio) ...@@ -67,6 +69,7 @@ static int vnet_send_attr(struct vio_driver_state *vio)
struct vnet_port *port = to_vnet_port(vio); struct vnet_port *port = to_vnet_port(vio);
struct net_device *dev = port->vp->dev; struct net_device *dev = port->vp->dev;
struct vio_net_attr_info pkt; struct vio_net_attr_info pkt;
int framelen = ETH_FRAME_LEN;
int i; int i;
memset(&pkt, 0, sizeof(pkt)); memset(&pkt, 0, sizeof(pkt));
...@@ -74,19 +77,41 @@ static int vnet_send_attr(struct vio_driver_state *vio) ...@@ -74,19 +77,41 @@ static int vnet_send_attr(struct vio_driver_state *vio)
pkt.tag.stype = VIO_SUBTYPE_INFO; pkt.tag.stype = VIO_SUBTYPE_INFO;
pkt.tag.stype_env = VIO_ATTR_INFO; pkt.tag.stype_env = VIO_ATTR_INFO;
pkt.tag.sid = vio_send_sid(vio); pkt.tag.sid = vio_send_sid(vio);
if (vio_version_before(vio, 1, 2))
pkt.xfer_mode = VIO_DRING_MODE; pkt.xfer_mode = VIO_DRING_MODE;
else
pkt.xfer_mode = VIO_NEW_DRING_MODE;
pkt.addr_type = VNET_ADDR_ETHERMAC; pkt.addr_type = VNET_ADDR_ETHERMAC;
pkt.ack_freq = 0; pkt.ack_freq = 0;
for (i = 0; i < 6; i++) for (i = 0; i < 6; i++)
pkt.addr |= (u64)dev->dev_addr[i] << ((5 - i) * 8); 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] " 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, pkt.xfer_mode, pkt.addr_type,
(unsigned long long) pkt.addr, (unsigned long long)pkt.addr,
pkt.ack_freq, pkt.ack_freq, pkt.plnk_updt, pkt.options,
(unsigned long long) pkt.mtu); (unsigned long long)pkt.mtu, pkt.cflags, pkt.ipv4_lso_maxlen);
return vio_ldc_send(vio, &pkt, sizeof(pkt)); return vio_ldc_send(vio, &pkt, sizeof(pkt));
} }
...@@ -94,18 +119,52 @@ static int vnet_send_attr(struct vio_driver_state *vio) ...@@ -94,18 +119,52 @@ static int vnet_send_attr(struct vio_driver_state *vio)
static int handle_attr_info(struct vio_driver_state *vio, static int handle_attr_info(struct vio_driver_state *vio,
struct vio_net_attr_info *pkt) struct vio_net_attr_info *pkt)
{ {
viodbg(HS, "GOT NET ATTR INFO xmode[0x%x] atype[0x%x] addr[%llx] " struct vnet_port *port = to_vnet_port(vio);
"ackfreq[%u] mtu[%llu]\n", 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, pkt->xfer_mode, pkt->addr_type,
(unsigned long long) pkt->addr, (unsigned long long)pkt->addr,
pkt->ack_freq, pkt->ack_freq, pkt->plnk_updt, pkt->options,
(unsigned long long) pkt->mtu); (unsigned long long)pkt->mtu, port->rmtu, pkt->cflags,
pkt->ipv4_lso_maxlen);
pkt->tag.sid = vio_send_sid(vio); 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->addr_type != VNET_ADDR_ETHERMAC ||
pkt->mtu != ETH_FRAME_LEN) { pkt->mtu != localmtu) {
viodbg(HS, "SEND NET ATTR NACK\n"); viodbg(HS, "SEND NET ATTR NACK\n");
pkt->tag.stype = VIO_SUBTYPE_NACK; pkt->tag.stype = VIO_SUBTYPE_NACK;
...@@ -114,7 +173,14 @@ static int handle_attr_info(struct vio_driver_state *vio, ...@@ -114,7 +173,14 @@ static int handle_attr_info(struct vio_driver_state *vio,
return -ECONNRESET; return -ECONNRESET;
} else { } 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; pkt->tag.stype = VIO_SUBTYPE_ACK;
...@@ -210,7 +276,7 @@ static int vnet_rx_one(struct vnet_port *port, unsigned int len, ...@@ -210,7 +276,7 @@ static int vnet_rx_one(struct vnet_port *port, unsigned int len,
int err; int err;
err = -EMSGSIZE; err = -EMSGSIZE;
if (unlikely(len < ETH_ZLEN || len > ETH_FRAME_LEN)) { if (unlikely(len < ETH_ZLEN || len > port->rmtu)) {
dev->stats.rx_length_errors++; dev->stats.rx_length_errors++;
goto out_dropped; goto out_dropped;
} }
...@@ -558,8 +624,10 @@ static void vnet_event(void *arg, int event) ...@@ -558,8 +624,10 @@ static void vnet_event(void *arg, int event)
vio_link_state_change(vio, event); vio_link_state_change(vio, event);
spin_unlock_irqrestore(&vio->lock, flags); spin_unlock_irqrestore(&vio->lock, flags);
if (event == LDC_EVENT_RESET) if (event == LDC_EVENT_RESET) {
port->rmtu = 0;
vio_port_up(vio); vio_port_up(vio);
}
return; return;
} }
...@@ -1051,8 +1119,8 @@ static int vnet_port_alloc_tx_bufs(struct vnet_port *port) ...@@ -1051,8 +1119,8 @@ static int vnet_port_alloc_tx_bufs(struct vnet_port *port)
void *dring; void *dring;
for (i = 0; i < VNET_TX_RING_SIZE; i++) { for (i = 0; i < VNET_TX_RING_SIZE; i++) {
void *buf = kzalloc(ETH_FRAME_LEN + 8, GFP_KERNEL); void *buf = kzalloc(VNET_MAXPACKET + 8, GFP_KERNEL);
int map_len = (ETH_FRAME_LEN + 7) & ~7; int map_len = (VNET_MAXPACKET + 7) & ~7;
err = -ENOMEM; err = -ENOMEM;
if (!buf) if (!buf)
......
...@@ -11,6 +11,7 @@ ...@@ -11,6 +11,7 @@
*/ */
#define VNET_TX_TIMEOUT (5 * HZ) #define VNET_TX_TIMEOUT (5 * HZ)
#define VNET_MAXPACKET 1518ULL /* ETH_FRAMELEN + VLAN_HDR */
#define VNET_TX_RING_SIZE 512 #define VNET_TX_RING_SIZE 512
#define VNET_TX_WAKEUP_THRESH(dr) ((dr)->pending / 4) #define VNET_TX_WAKEUP_THRESH(dr) ((dr)->pending / 4)
...@@ -44,6 +45,8 @@ struct vnet_port { ...@@ -44,6 +45,8 @@ struct vnet_port {
u32 stop_rx_idx; u32 stop_rx_idx;
bool stop_rx; bool stop_rx;
bool start_cons; bool start_cons;
u64 rmtu;
}; };
static inline struct vnet_port *to_vnet_port(struct vio_driver_state *vio) static inline struct vnet_port *to_vnet_port(struct vio_driver_state *vio)
......
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