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-rw-r--r--drivers/net/ethernet/sfc/Kconfig7
-rw-r--r--drivers/net/ethernet/sfc/Makefile1
-rw-r--r--drivers/net/ethernet/sfc/efx.c17
-rw-r--r--drivers/net/ethernet/sfc/efx.h1
-rw-r--r--drivers/net/ethernet/sfc/ethtool.c1
-rw-r--r--drivers/net/ethernet/sfc/mcdi.c49
-rw-r--r--drivers/net/ethernet/sfc/mcdi.h6
-rw-r--r--drivers/net/ethernet/sfc/mcdi_pcol.h29
-rw-r--r--drivers/net/ethernet/sfc/mtd.c7
-rw-r--r--drivers/net/ethernet/sfc/net_driver.h29
-rw-r--r--drivers/net/ethernet/sfc/nic.h36
-rw-r--r--drivers/net/ethernet/sfc/ptp.c1483
-rw-r--r--drivers/net/ethernet/sfc/rx.c20
-rw-r--r--drivers/net/ethernet/sfc/siena.c1
-rw-r--r--drivers/net/ethernet/sfc/siena_sriov.c7
-rw-r--r--drivers/net/ethernet/sfc/tx.c6
16 files changed, 1666 insertions, 34 deletions
diff --git a/drivers/net/ethernet/sfc/Kconfig b/drivers/net/ethernet/sfc/Kconfig
index fb3cbc27063c..25906c1d1b15 100644
--- a/drivers/net/ethernet/sfc/Kconfig
+++ b/drivers/net/ethernet/sfc/Kconfig
@@ -34,3 +34,10 @@ config SFC_SRIOV
This enables support for the SFC9000 I/O Virtualization
features, allowing accelerated network performance in
virtualized environments.
+config SFC_PTP
+ bool "Solarflare SFC9000-family PTP support"
+ depends on SFC && PTP_1588_CLOCK && !(SFC=y && PTP_1588_CLOCK=m)
+ default y
+ ---help---
+ This enables support for the Precision Time Protocol (PTP)
+ on SFC9000-family NICs
diff --git a/drivers/net/ethernet/sfc/Makefile b/drivers/net/ethernet/sfc/Makefile
index ea1f8db57318..e11f2ecf69d9 100644
--- a/drivers/net/ethernet/sfc/Makefile
+++ b/drivers/net/ethernet/sfc/Makefile
@@ -5,5 +5,6 @@ sfc-y += efx.o nic.o falcon.o siena.o tx.o rx.o filter.o \
mcdi.o mcdi_phy.o mcdi_mon.o
sfc-$(CONFIG_SFC_MTD) += mtd.o
sfc-$(CONFIG_SFC_SRIOV) += siena_sriov.o
+sfc-$(CONFIG_SFC_PTP) += ptp.o
obj-$(CONFIG_SFC) += sfc.o
diff --git a/drivers/net/ethernet/sfc/efx.c b/drivers/net/ethernet/sfc/efx.c
index a606db43c5ba..96bd980e828d 100644
--- a/drivers/net/ethernet/sfc/efx.c
+++ b/drivers/net/ethernet/sfc/efx.c
@@ -734,6 +734,7 @@ static void efx_remove_channel(struct efx_channel *channel)
efx_for_each_possible_channel_tx_queue(tx_queue, channel)
efx_remove_tx_queue(tx_queue);
efx_remove_eventq(channel);
+ channel->type->post_remove(channel);
}
static void efx_remove_channels(struct efx_nic *efx)
@@ -852,6 +853,7 @@ void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue)
static const struct efx_channel_type efx_default_channel_type = {
.pre_probe = efx_channel_dummy_op_int,
+ .post_remove = efx_channel_dummy_op_void,
.get_name = efx_get_channel_name,
.copy = efx_copy_channel,
.keep_eventq = false,
@@ -862,6 +864,10 @@ int efx_channel_dummy_op_int(struct efx_channel *channel)
return 0;
}
+void efx_channel_dummy_op_void(struct efx_channel *channel)
+{
+}
+
/**************************************************************************
*
* Port handling
@@ -1451,10 +1457,16 @@ static void efx_set_channels(struct efx_nic *efx)
efx->tx_channel_offset =
separate_tx_channels ? efx->n_channels - efx->n_tx_channels : 0;
- /* We need to adjust the TX queue numbers if we have separate
+ /* We need to mark which channels really have RX and TX
+ * queues, and adjust the TX queue numbers if we have separate
* RX-only and TX-only channels.
*/
efx_for_each_channel(channel, efx) {
+ if (channel->channel < efx->n_rx_channels)
+ channel->rx_queue.core_index = channel->channel;
+ else
+ channel->rx_queue.core_index = -1;
+
efx_for_each_channel_tx_queue(tx_queue, channel)
tx_queue->queue -= (efx->tx_channel_offset *
EFX_TXQ_TYPES);
@@ -1767,6 +1779,9 @@ static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd)
struct efx_nic *efx = netdev_priv(net_dev);
struct mii_ioctl_data *data = if_mii(ifr);
+ if (cmd == SIOCSHWTSTAMP)
+ return efx_ptp_ioctl(efx, ifr, cmd);
+
/* Convert phy_id from older PRTAD/DEVAD format */
if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) &&
(data->phy_id & 0xfc00) == 0x0400)
diff --git a/drivers/net/ethernet/sfc/efx.h b/drivers/net/ethernet/sfc/efx.h
index 70755c97251a..f11170bc48bf 100644
--- a/drivers/net/ethernet/sfc/efx.h
+++ b/drivers/net/ethernet/sfc/efx.h
@@ -102,6 +102,7 @@ static inline void efx_filter_rfs_expire(struct efx_channel *channel) {}
/* Channels */
extern int efx_channel_dummy_op_int(struct efx_channel *channel);
+extern void efx_channel_dummy_op_void(struct efx_channel *channel);
extern void efx_process_channel_now(struct efx_channel *channel);
extern int
efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries);
diff --git a/drivers/net/ethernet/sfc/ethtool.c b/drivers/net/ethernet/sfc/ethtool.c
index f8e7e204981f..9df556c01b8e 100644
--- a/drivers/net/ethernet/sfc/ethtool.c
+++ b/drivers/net/ethernet/sfc/ethtool.c
@@ -1174,6 +1174,7 @@ const struct ethtool_ops efx_ethtool_ops = {
.get_rxfh_indir_size = efx_ethtool_get_rxfh_indir_size,
.get_rxfh_indir = efx_ethtool_get_rxfh_indir,
.set_rxfh_indir = efx_ethtool_set_rxfh_indir,
+ .get_ts_info = efx_ptp_get_ts_info,
.get_module_info = efx_ethtool_get_module_info,
.get_module_eeprom = efx_ethtool_get_module_eeprom,
};
diff --git a/drivers/net/ethernet/sfc/mcdi.c b/drivers/net/ethernet/sfc/mcdi.c
index fc5e7bbcbc9e..aea43cbd0520 100644
--- a/drivers/net/ethernet/sfc/mcdi.c
+++ b/drivers/net/ethernet/sfc/mcdi.c
@@ -320,14 +320,20 @@ static void efx_mcdi_ev_cpl(struct efx_nic *efx, unsigned int seqno,
efx_mcdi_complete(mcdi);
}
-/* Issue the given command by writing the data into the shared memory PDU,
- * ring the doorbell and wait for completion. Copyout the result. */
int efx_mcdi_rpc(struct efx_nic *efx, unsigned cmd,
const u8 *inbuf, size_t inlen, u8 *outbuf, size_t outlen,
size_t *outlen_actual)
{
+ efx_mcdi_rpc_start(efx, cmd, inbuf, inlen);
+ return efx_mcdi_rpc_finish(efx, cmd, inlen,
+ outbuf, outlen, outlen_actual);
+}
+
+void efx_mcdi_rpc_start(struct efx_nic *efx, unsigned cmd, const u8 *inbuf,
+ size_t inlen)
+{
struct efx_mcdi_iface *mcdi = efx_mcdi(efx);
- int rc;
+
BUG_ON(efx_nic_rev(efx) < EFX_REV_SIENA_A0);
efx_mcdi_acquire(mcdi);
@@ -338,6 +344,15 @@ int efx_mcdi_rpc(struct efx_nic *efx, unsigned cmd,
spin_unlock_bh(&mcdi->iface_lock);
efx_mcdi_copyin(efx, cmd, inbuf, inlen);
+}
+
+int efx_mcdi_rpc_finish(struct efx_nic *efx, unsigned cmd, size_t inlen,
+ u8 *outbuf, size_t outlen, size_t *outlen_actual)
+{
+ struct efx_mcdi_iface *mcdi = efx_mcdi(efx);
+ int rc;
+
+ BUG_ON(efx_nic_rev(efx) < EFX_REV_SIENA_A0);
if (mcdi->mode == MCDI_MODE_POLL)
rc = efx_mcdi_poll(efx);
@@ -563,6 +578,11 @@ void efx_mcdi_process_event(struct efx_channel *channel,
case MCDI_EVENT_CODE_FLR:
efx_sriov_flr(efx, MCDI_EVENT_FIELD(*event, FLR_VF));
break;
+ case MCDI_EVENT_CODE_PTP_RX:
+ case MCDI_EVENT_CODE_PTP_FAULT:
+ case MCDI_EVENT_CODE_PTP_PPS:
+ efx_ptp_event(efx, event);
+ break;
default:
netif_err(efx, hw, efx->net_dev, "Unknown MCDI event 0x%x\n",
@@ -641,9 +661,8 @@ int efx_mcdi_get_board_cfg(struct efx_nic *efx, u8 *mac_address,
u16 *fw_subtype_list, u32 *capabilities)
{
uint8_t outbuf[MC_CMD_GET_BOARD_CFG_OUT_LENMIN];
- size_t outlen;
+ size_t outlen, offset, i;
int port_num = efx_port_num(efx);
- int offset;
int rc;
BUILD_BUG_ON(MC_CMD_GET_BOARD_CFG_IN_LEN != 0);
@@ -663,11 +682,18 @@ int efx_mcdi_get_board_cfg(struct efx_nic *efx, u8 *mac_address,
: MC_CMD_GET_BOARD_CFG_OUT_MAC_ADDR_BASE_PORT0_OFST;
if (mac_address)
memcpy(mac_address, outbuf + offset, ETH_ALEN);
- if (fw_subtype_list)
- memcpy(fw_subtype_list,
- outbuf + MC_CMD_GET_BOARD_CFG_OUT_FW_SUBTYPE_LIST_OFST,
- MC_CMD_GET_BOARD_CFG_OUT_FW_SUBTYPE_LIST_MINNUM *
- sizeof(fw_subtype_list[0]));
+ if (fw_subtype_list) {
+ /* Byte-swap and truncate or zero-pad as necessary */
+ offset = MC_CMD_GET_BOARD_CFG_OUT_FW_SUBTYPE_LIST_OFST;
+ for (i = 0;
+ i < MC_CMD_GET_BOARD_CFG_OUT_FW_SUBTYPE_LIST_MAXNUM;
+ i++) {
+ fw_subtype_list[i] =
+ (offset + 2 <= outlen) ?
+ le16_to_cpup((__le16 *)(outbuf + offset)) : 0;
+ offset += 2;
+ }
+ }
if (capabilities) {
if (port_num)
*capabilities = MCDI_DWORD(outbuf,
@@ -1169,6 +1195,9 @@ int efx_mcdi_flush_rxqs(struct efx_nic *efx)
__le32 *qid;
int rc, count;
+ BUILD_BUG_ON(EFX_MAX_CHANNELS >
+ MC_CMD_FLUSH_RX_QUEUES_IN_QID_OFST_MAXNUM);
+
qid = kmalloc(EFX_MAX_CHANNELS * sizeof(*qid), GFP_KERNEL);
if (qid == NULL)
return -ENOMEM;
diff --git a/drivers/net/ethernet/sfc/mcdi.h b/drivers/net/ethernet/sfc/mcdi.h
index 0bdf3e331832..dc25caaa3983 100644
--- a/drivers/net/ethernet/sfc/mcdi.h
+++ b/drivers/net/ethernet/sfc/mcdi.h
@@ -71,6 +71,12 @@ extern int efx_mcdi_rpc(struct efx_nic *efx, unsigned cmd, const u8 *inbuf,
size_t inlen, u8 *outbuf, size_t outlen,
size_t *outlen_actual);
+extern void efx_mcdi_rpc_start(struct efx_nic *efx, unsigned cmd,
+ const u8 *inbuf, size_t inlen);
+extern int efx_mcdi_rpc_finish(struct efx_nic *efx, unsigned cmd, size_t inlen,
+ u8 *outbuf, size_t outlen,
+ size_t *outlen_actual);
+
extern int efx_mcdi_poll_reboot(struct efx_nic *efx);
extern void efx_mcdi_mode_poll(struct efx_nic *efx);
extern void efx_mcdi_mode_event(struct efx_nic *efx);
diff --git a/drivers/net/ethernet/sfc/mcdi_pcol.h b/drivers/net/ethernet/sfc/mcdi_pcol.h
index db4beed97669..9d426d0457bd 100644
--- a/drivers/net/ethernet/sfc/mcdi_pcol.h
+++ b/drivers/net/ethernet/sfc/mcdi_pcol.h
@@ -289,6 +289,7 @@
#define MCDI_EVENT_CODE_TX_FLUSH 0xc /* enum */
#define MCDI_EVENT_CODE_PTP_RX 0xd /* enum */
#define MCDI_EVENT_CODE_PTP_FAULT 0xe /* enum */
+#define MCDI_EVENT_CODE_PTP_PPS 0xf /* enum */
#define MCDI_EVENT_CMDDONE_DATA_OFST 0
#define MCDI_EVENT_CMDDONE_DATA_LBN 0
#define MCDI_EVENT_CMDDONE_DATA_WIDTH 32
@@ -491,12 +492,12 @@
/* MC_CMD_GET_FPGAREG_OUT msgresponse */
#define MC_CMD_GET_FPGAREG_OUT_LENMIN 1
-#define MC_CMD_GET_FPGAREG_OUT_LENMAX 255
+#define MC_CMD_GET_FPGAREG_OUT_LENMAX 252
#define MC_CMD_GET_FPGAREG_OUT_LEN(num) (0+1*(num))
#define MC_CMD_GET_FPGAREG_OUT_BUFFER_OFST 0
#define MC_CMD_GET_FPGAREG_OUT_BUFFER_LEN 1
#define MC_CMD_GET_FPGAREG_OUT_BUFFER_MINNUM 1
-#define MC_CMD_GET_FPGAREG_OUT_BUFFER_MAXNUM 255
+#define MC_CMD_GET_FPGAREG_OUT_BUFFER_MAXNUM 252
/***********************************/
@@ -507,13 +508,13 @@
/* MC_CMD_PUT_FPGAREG_IN msgrequest */
#define MC_CMD_PUT_FPGAREG_IN_LENMIN 5
-#define MC_CMD_PUT_FPGAREG_IN_LENMAX 255
+#define MC_CMD_PUT_FPGAREG_IN_LENMAX 252
#define MC_CMD_PUT_FPGAREG_IN_LEN(num) (4+1*(num))
#define MC_CMD_PUT_FPGAREG_IN_ADDR_OFST 0
#define MC_CMD_PUT_FPGAREG_IN_BUFFER_OFST 4
#define MC_CMD_PUT_FPGAREG_IN_BUFFER_LEN 1
#define MC_CMD_PUT_FPGAREG_IN_BUFFER_MINNUM 1
-#define MC_CMD_PUT_FPGAREG_IN_BUFFER_MAXNUM 251
+#define MC_CMD_PUT_FPGAREG_IN_BUFFER_MAXNUM 248
/* MC_CMD_PUT_FPGAREG_OUT msgresponse */
#define MC_CMD_PUT_FPGAREG_OUT_LEN 0
@@ -560,7 +561,7 @@
/* MC_CMD_PTP_IN_TRANSMIT msgrequest */
#define MC_CMD_PTP_IN_TRANSMIT_LENMIN 13
-#define MC_CMD_PTP_IN_TRANSMIT_LENMAX 255
+#define MC_CMD_PTP_IN_TRANSMIT_LENMAX 252
#define MC_CMD_PTP_IN_TRANSMIT_LEN(num) (12+1*(num))
/* MC_CMD_PTP_IN_CMD_OFST 0 */
/* MC_CMD_PTP_IN_PERIPH_ID_OFST 4 */
@@ -568,7 +569,7 @@
#define MC_CMD_PTP_IN_TRANSMIT_PACKET_OFST 12
#define MC_CMD_PTP_IN_TRANSMIT_PACKET_LEN 1
#define MC_CMD_PTP_IN_TRANSMIT_PACKET_MINNUM 1
-#define MC_CMD_PTP_IN_TRANSMIT_PACKET_MAXNUM 243
+#define MC_CMD_PTP_IN_TRANSMIT_PACKET_MAXNUM 240
/* MC_CMD_PTP_IN_READ_NIC_TIME msgrequest */
#define MC_CMD_PTP_IN_READ_NIC_TIME_LEN 8
@@ -1145,7 +1146,7 @@
/* MC_CMD_PUTS_IN msgrequest */
#define MC_CMD_PUTS_IN_LENMIN 13
-#define MC_CMD_PUTS_IN_LENMAX 255
+#define MC_CMD_PUTS_IN_LENMAX 252
#define MC_CMD_PUTS_IN_LEN(num) (12+1*(num))
#define MC_CMD_PUTS_IN_DEST_OFST 0
#define MC_CMD_PUTS_IN_UART_LBN 0
@@ -1157,7 +1158,7 @@
#define MC_CMD_PUTS_IN_STRING_OFST 12
#define MC_CMD_PUTS_IN_STRING_LEN 1
#define MC_CMD_PUTS_IN_STRING_MINNUM 1
-#define MC_CMD_PUTS_IN_STRING_MAXNUM 243
+#define MC_CMD_PUTS_IN_STRING_MAXNUM 240
/* MC_CMD_PUTS_OUT msgresponse */
#define MC_CMD_PUTS_OUT_LEN 0
@@ -1947,12 +1948,12 @@
/* MC_CMD_NVRAM_READ_OUT msgresponse */
#define MC_CMD_NVRAM_READ_OUT_LENMIN 1
-#define MC_CMD_NVRAM_READ_OUT_LENMAX 255
+#define MC_CMD_NVRAM_READ_OUT_LENMAX 252
#define MC_CMD_NVRAM_READ_OUT_LEN(num) (0+1*(num))
#define MC_CMD_NVRAM_READ_OUT_READ_BUFFER_OFST 0
#define MC_CMD_NVRAM_READ_OUT_READ_BUFFER_LEN 1
#define MC_CMD_NVRAM_READ_OUT_READ_BUFFER_MINNUM 1
-#define MC_CMD_NVRAM_READ_OUT_READ_BUFFER_MAXNUM 255
+#define MC_CMD_NVRAM_READ_OUT_READ_BUFFER_MAXNUM 252
/***********************************/
@@ -1963,7 +1964,7 @@
/* MC_CMD_NVRAM_WRITE_IN msgrequest */
#define MC_CMD_NVRAM_WRITE_IN_LENMIN 13
-#define MC_CMD_NVRAM_WRITE_IN_LENMAX 255
+#define MC_CMD_NVRAM_WRITE_IN_LENMAX 252
#define MC_CMD_NVRAM_WRITE_IN_LEN(num) (12+1*(num))
#define MC_CMD_NVRAM_WRITE_IN_TYPE_OFST 0
/* Enum values, see field(s): */
@@ -1973,7 +1974,7 @@
#define MC_CMD_NVRAM_WRITE_IN_WRITE_BUFFER_OFST 12
#define MC_CMD_NVRAM_WRITE_IN_WRITE_BUFFER_LEN 1
#define MC_CMD_NVRAM_WRITE_IN_WRITE_BUFFER_MINNUM 1
-#define MC_CMD_NVRAM_WRITE_IN_WRITE_BUFFER_MAXNUM 243
+#define MC_CMD_NVRAM_WRITE_IN_WRITE_BUFFER_MAXNUM 240
/* MC_CMD_NVRAM_WRITE_OUT msgresponse */
#define MC_CMD_NVRAM_WRITE_OUT_LEN 0
@@ -2305,13 +2306,13 @@
/* MC_CMD_GET_PHY_MEDIA_INFO_OUT msgresponse */
#define MC_CMD_GET_PHY_MEDIA_INFO_OUT_LENMIN 5
-#define MC_CMD_GET_PHY_MEDIA_INFO_OUT_LENMAX 255
+#define MC_CMD_GET_PHY_MEDIA_INFO_OUT_LENMAX 252
#define MC_CMD_GET_PHY_MEDIA_INFO_OUT_LEN(num) (4+1*(num))
#define MC_CMD_GET_PHY_MEDIA_INFO_OUT_DATALEN_OFST 0
#define MC_CMD_GET_PHY_MEDIA_INFO_OUT_DATA_OFST 4
#define MC_CMD_GET_PHY_MEDIA_INFO_OUT_DATA_LEN 1
#define MC_CMD_GET_PHY_MEDIA_INFO_OUT_DATA_MINNUM 1
-#define MC_CMD_GET_PHY_MEDIA_INFO_OUT_DATA_MAXNUM 251
+#define MC_CMD_GET_PHY_MEDIA_INFO_OUT_DATA_MAXNUM 248
/***********************************/
diff --git a/drivers/net/ethernet/sfc/mtd.c b/drivers/net/ethernet/sfc/mtd.c
index 758148379b0e..08f825b71ac8 100644
--- a/drivers/net/ethernet/sfc/mtd.c
+++ b/drivers/net/ethernet/sfc/mtd.c
@@ -585,6 +585,7 @@ static const struct siena_nvram_type_info siena_nvram_types[] = {
[MC_CMD_NVRAM_TYPE_EXP_ROM_CFG_PORT1] = { 1, "sfc_exp_rom_cfg" },
[MC_CMD_NVRAM_TYPE_PHY_PORT0] = { 0, "sfc_phy_fw" },
[MC_CMD_NVRAM_TYPE_PHY_PORT1] = { 1, "sfc_phy_fw" },
+ [MC_CMD_NVRAM_TYPE_FPGA] = { 0, "sfc_fpga" },
};
static int siena_mtd_probe_partition(struct efx_nic *efx,
@@ -598,7 +599,8 @@ static int siena_mtd_probe_partition(struct efx_nic *efx,
bool protected;
int rc;
- if (type >= ARRAY_SIZE(siena_nvram_types))
+ if (type >= ARRAY_SIZE(siena_nvram_types) ||
+ siena_nvram_types[type].name == NULL)
return -ENODEV;
info = &siena_nvram_types[type];
@@ -627,7 +629,8 @@ static int siena_mtd_get_fw_subtypes(struct efx_nic *efx,
struct efx_mtd *efx_mtd)
{
struct efx_mtd_partition *part;
- uint16_t fw_subtype_list[MC_CMD_GET_BOARD_CFG_OUT_FW_SUBTYPE_LIST_MINNUM];
+ uint16_t fw_subtype_list[
+ MC_CMD_GET_BOARD_CFG_OUT_FW_SUBTYPE_LIST_MAXNUM];
int rc;
rc = efx_mcdi_get_board_cfg(efx, NULL, fw_subtype_list, NULL);
diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h
index 7ab1232494ef..c1a010cda89b 100644
--- a/drivers/net/ethernet/sfc/net_driver.h
+++ b/drivers/net/ethernet/sfc/net_driver.h
@@ -37,7 +37,7 @@
*
**************************************************************************/
-#define EFX_DRIVER_VERSION "3.1"
+#define EFX_DRIVER_VERSION "3.2"
#ifdef DEBUG
#define EFX_BUG_ON_PARANOID(x) BUG_ON(x)
@@ -56,7 +56,8 @@
#define EFX_MAX_CHANNELS 32U
#define EFX_MAX_RX_QUEUES EFX_MAX_CHANNELS
#define EFX_EXTRA_CHANNEL_IOV 0
-#define EFX_MAX_EXTRA_CHANNELS 1U
+#define EFX_EXTRA_CHANNEL_PTP 1
+#define EFX_MAX_EXTRA_CHANNELS 2U
/* Checksum generation is a per-queue option in hardware, so each
* queue visible to the networking core is backed by two hardware TX
@@ -68,6 +69,9 @@
#define EFX_TXQ_TYPES 4
#define EFX_MAX_TX_QUEUES (EFX_TXQ_TYPES * EFX_MAX_CHANNELS)
+/* Forward declare Precision Time Protocol (PTP) support structure. */
+struct efx_ptp_data;
+
struct efx_self_tests;
/**
@@ -242,6 +246,8 @@ struct efx_rx_page_state {
/**
* struct efx_rx_queue - An Efx RX queue
* @efx: The associated Efx NIC
+ * @core_index: Index of network core RX queue. Will be >= 0 iff this
+ * is associated with a real RX queue.
* @buffer: The software buffer ring
* @rxd: The hardware descriptor ring
* @ptr_mask: The size of the ring minus 1.
@@ -263,6 +269,7 @@ struct efx_rx_page_state {
*/
struct efx_rx_queue {
struct efx_nic *efx;
+ int core_index;
struct efx_rx_buffer *buffer;
struct efx_special_buffer rxd;
unsigned int ptr_mask;
@@ -390,14 +397,17 @@ struct efx_channel {
* @get_name: Generate the channel's name (used for its IRQ handler)
* @copy: Copy the channel state prior to reallocation. May be %NULL if
* reallocation is not supported.
+ * @receive_skb: Handle an skb ready to be passed to netif_receive_skb()
* @keep_eventq: Flag for whether event queue should be kept initialised
* while the device is stopped
*/
struct efx_channel_type {
void (*handle_no_channel)(struct efx_nic *);
int (*pre_probe)(struct efx_channel *);
+ void (*post_remove)(struct efx_channel *);
void (*get_name)(struct efx_channel *, char *buf, size_t len);
struct efx_channel *(*copy)(const struct efx_channel *);
+ void (*receive_skb)(struct efx_channel *, struct sk_buff *);
bool keep_eventq;
};
@@ -730,6 +740,7 @@ struct vfdi_status;
* %local_addr_list. Protected by %local_lock.
* @local_lock: Mutex protecting %local_addr_list and %local_page_list.
* @peer_work: Work item to broadcast peer addresses to VMs.
+ * @ptp_data: PTP state data
* @monitor_work: Hardware monitor workitem
* @biu_lock: BIU (bus interface unit) lock
* @last_irq_cpu: Last CPU to handle a possible test interrupt. This
@@ -857,6 +868,10 @@ struct efx_nic {
struct work_struct peer_work;
#endif
+#ifdef CONFIG_SFC_PTP
+ struct efx_ptp_data *ptp_data;
+#endif
+
/* The following fields may be written more often */
struct delayed_work monitor_work ____cacheline_aligned_in_smp;
@@ -1047,7 +1062,7 @@ static inline bool efx_tx_queue_used(struct efx_tx_queue *tx_queue)
static inline bool efx_channel_has_rx_queue(struct efx_channel *channel)
{
- return channel->channel < channel->efx->n_rx_channels;
+ return channel->rx_queue.core_index >= 0;
}
static inline struct efx_rx_queue *
@@ -1119,5 +1134,13 @@ static inline void clear_bit_le(unsigned nr, unsigned char *addr)
#define EFX_MAX_FRAME_LEN(mtu) \
((((mtu) + ETH_HLEN + VLAN_HLEN + 4/* FCS */ + 7) & ~7) + 16)
+static inline bool efx_xmit_with_hwtstamp(struct sk_buff *skb)
+{
+ return skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP;
+}
+static inline void efx_xmit_hwtstamp_pending(struct sk_buff *skb)
+{
+ skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
+}
#endif /* EFX_NET_DRIVER_H */
diff --git a/drivers/net/ethernet/sfc/nic.h b/drivers/net/ethernet/sfc/nic.h
index bab5cd9f5740..438cef11f727 100644
--- a/drivers/net/ethernet/sfc/nic.h
+++ b/drivers/net/ethernet/sfc/nic.h
@@ -11,6 +11,7 @@
#ifndef EFX_NIC_H
#define EFX_NIC_H
+#include <linux/net_tstamp.h>
#include <linux/i2c-algo-bit.h>
#include "net_driver.h"
#include "efx.h"
@@ -250,6 +251,41 @@ extern int efx_sriov_get_vf_config(struct net_device *dev, int vf,
extern int efx_sriov_set_vf_spoofchk(struct net_device *net_dev, int vf,
bool spoofchk);
+struct ethtool_ts_info;
+#ifdef CONFIG_SFC_PTP
+extern void efx_ptp_probe(struct efx_nic *efx);
+extern int efx_ptp_ioctl(struct efx_nic *efx, struct ifreq *ifr, int cmd);
+extern int efx_ptp_get_ts_info(struct net_device *net_dev,
+ struct ethtool_ts_info *ts_info);
+extern bool efx_ptp_is_ptp_tx(struct efx_nic *efx, struct sk_buff *skb);
+extern int efx_ptp_tx(struct efx_nic *efx, struct sk_buff *skb);
+extern void efx_ptp_event(struct efx_nic *efx, efx_qword_t *ev);
+#else
+static inline void efx_ptp_probe(struct efx_nic *efx) {}
+static inline int efx_ptp_ioctl(struct efx_nic *efx, struct ifreq *ifr, int cmd)
+{
+ return -EOPNOTSUPP;
+}
+static inline int efx_ptp_get_ts_info(struct net_device *net_dev,
+ struct ethtool_ts_info *ts_info)
+{
+ ts_info->so_timestamping = (SOF_TIMESTAMPING_SOFTWARE |
+ SOF_TIMESTAMPING_RX_SOFTWARE);
+ ts_info->phc_index = -1;
+
+ return 0;
+}
+static inline bool efx_ptp_is_ptp_tx(struct efx_nic *efx, struct sk_buff *skb)
+{
+ return false;
+}
+static inline int efx_ptp_tx(struct efx_nic *efx, struct sk_buff *skb)
+{
+ return NETDEV_TX_OK;
+}
+static inline void efx_ptp_event(struct efx_nic *efx, efx_qword_t *ev) {}
+#endif
+
extern const struct efx_nic_type falcon_a1_nic_type;
extern const struct efx_nic_type falcon_b0_nic_type;
extern const struct efx_nic_type siena_a0_nic_type;
diff --git a/drivers/net/ethernet/sfc/ptp.c b/drivers/net/ethernet/sfc/ptp.c
new file mode 100644
index 000000000000..2b07a4eae07e
--- /dev/null
+++ b/drivers/net/ethernet/sfc/ptp.c
@@ -0,0 +1,1483 @@
+/****************************************************************************
+ * Driver for Solarflare Solarstorm network controllers and boards
+ * Copyright 2011 Solarflare Communications Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation, incorporated herein by reference.
+ */
+
+/* Theory of operation:
+ *
+ * PTP support is assisted by firmware running on the MC, which provides
+ * the hardware timestamping capabilities. Both transmitted and received
+ * PTP event packets are queued onto internal queues for subsequent processing;
+ * this is because the MC operations are relatively long and would block
+ * block NAPI/interrupt operation.
+ *
+ * Receive event processing:
+ * The event contains the packet's UUID and sequence number, together
+ * with the hardware timestamp. The PTP receive packet queue is searched
+ * for this UUID/sequence number and, if found, put on a pending queue.
+ * Packets not matching are delivered without timestamps (MCDI events will
+ * always arrive after the actual packet).
+ * It is important for the operation of the PTP protocol that the ordering
+ * of packets between the event and general port is maintained.
+ *
+ * Work queue processing:
+ * If work waiting, synchronise host/hardware time
+ *
+ * Transmit: send packet through MC, which returns the transmission time
+ * that is converted to an appropriate timestamp.
+ *
+ * Receive: the packet's reception time is converted to an appropriate
+ * timestamp.
+ */
+#include <linux/ip.h>
+#include <linux/udp.h>
+#include <linux/time.h>
+#include <linux/ktime.h>
+#include <linux/module.h>
+#include <linux/net_tstamp.h>
+#include <linux/pps_kernel.h>
+#include <linux/ptp_clock_kernel.h>
+#include "net_driver.h"
+#include "efx.h"
+#include "mcdi.h"
+#include "mcdi_pcol.h"
+#include "io.h"
+#include "regs.h"
+#include "nic.h"
+
+/* Maximum number of events expected to make up a PTP event */
+#define MAX_EVENT_FRAGS 3
+
+/* Maximum delay, ms, to begin synchronisation */
+#define MAX_SYNCHRONISE_WAIT_MS 2
+
+/* How long, at most, to spend synchronising */
+#define SYNCHRONISE_PERIOD_NS 250000
+
+/* How often to update the shared memory time */
+#define SYNCHRONISATION_GRANULARITY_NS 200
+
+/* Minimum permitted length of a (corrected) synchronisation time */
+#define MIN_SYNCHRONISATION_NS 120
+
+/* Maximum permitted length of a (corrected) synchronisation time */
+#define MAX_SYNCHRONISATION_NS 1000
+
+/* How many (MC) receive events that can be queued */
+#define MAX_RECEIVE_EVENTS 8
+
+/* Length of (modified) moving average. */
+#define AVERAGE_LENGTH 16
+
+/* How long an unmatched event or packet can be held */
+#define PKT_EVENT_LIFETIME_MS 10
+
+/* Offsets into PTP packet for identification. These offsets are from the
+ * start of the IP header, not the MAC header. Note that neither PTP V1 nor
+ * PTP V2 permit the use of IPV4 options.
+ */
+#define PTP_DPORT_OFFSET 22
+
+#define PTP_V1_VERSION_LENGTH 2
+#define PTP_V1_VERSION_OFFSET 28
+
+#define PTP_V1_UUID_LENGTH 6
+#define PTP_V1_UUID_OFFSET 50
+
+#define PTP_V1_SEQUENCE_LENGTH 2
+#define PTP_V1_SEQUENCE_OFFSET 58
+
+/* The minimum length of a PTP V1 packet for offsets, etc. to be valid:
+ * includes IP header.
+ */
+#define PTP_V1_MIN_LENGTH 64
+
+#define PTP_V2_VERSION_LENGTH 1
+#define PTP_V2_VERSION_OFFSET 29
+
+/* Although PTP V2 UUIDs are comprised a ClockIdentity (8) and PortNumber (2),
+ * the MC only captures the last six bytes of the clock identity. These values
+ * reflect those, not the ones used in the standard. The standard permits
+ * mapping of V1 UUIDs to V2 UUIDs with these same values.
+ */
+#define PTP_V2_MC_UUID_LENGTH 6
+#define PTP_V2_MC_UUID_OFFSET 50
+
+#define PTP_V2_SEQUENCE_LENGTH 2
+#define PTP_V2_SEQUENCE_OFFSET 58
+
+/* The minimum length of a PTP V2 packet for offsets, etc. to be valid:
+ * includes IP header.
+ */
+#define PTP_V2_MIN_LENGTH 63
+
+#define PTP_MIN_LENGTH 63
+
+#define PTP_ADDRESS 0xe0000181 /* 224.0.1.129 */
+#define PTP_EVENT_PORT 319
+#define PTP_GENERAL_PORT 320
+
+/* Annoyingly the format of the version numbers are different between
+ * versions 1 and 2 so it isn't possible to simply look for 1 or 2.
+ */
+#define PTP_VERSION_V1 1
+
+#define PTP_VERSION_V2 2
+#define PTP_VERSION_V2_MASK 0x0f
+
+enum ptp_packet_state {
+ PTP_PACKET_STATE_UNMATCHED = 0,
+ PTP_PACKET_STATE_MATCHED,
+ PTP_PACKET_STATE_TIMED_OUT,
+ PTP_PACKET_STATE_MATCH_UNWANTED
+};
+
+/* NIC synchronised with single word of time only comprising
+ * partial seconds and full nanoseconds: 10^9 ~ 2^30 so 2 bits for seconds.
+ */
+#define MC_NANOSECOND_BITS 30
+#define MC_NANOSECOND_MASK ((1 << MC_NANOSECOND_BITS) - 1)
+#define MC_SECOND_MASK ((1 << (32 - MC_NANOSECOND_BITS)) - 1)
+
+/* Maximum parts-per-billion adjustment that is acceptable */
+#define MAX_PPB 1000000
+
+/* Number of bits required to hold the above */
+#define MAX_PPB_BITS 20
+
+/* Number of extra bits allowed when calculating fractional ns.
+ * EXTRA_BITS + MC_CMD_PTP_IN_ADJUST_BITS + MAX_PPB_BITS should
+ * be less than 63.
+ */
+#define PPB_EXTRA_BITS 2
+
+/* Precalculate scale word to avoid long long division at runtime */
+#define PPB_SCALE_WORD ((1LL << (PPB_EXTRA_BITS + MC_CMD_PTP_IN_ADJUST_BITS +\
+ MAX_PPB_BITS)) / 1000000000LL)
+
+#define PTP_SYNC_ATTEMPTS 4
+
+/**
+ * struct efx_ptp_match - Matching structure, stored in sk_buff's cb area.
+ * @words: UUID and (partial) sequence number
+ * @expiry: Time after which the packet should be delivered irrespective of
+ * event arrival.
+ * @state: The state of the packet - whether it is ready for processing or
+ * whether that is of no interest.
+ */
+struct efx_ptp_match {
+ u32 words[DIV_ROUND_UP(PTP_V1_UUID_LENGTH, 4)];
+ unsigned long expiry;
+ enum ptp_packet_state state;
+};
+
+/**
+ * struct efx_ptp_event_rx - A PTP receive event (from MC)
+ * @seq0: First part of (PTP) UUID
+ * @seq1: Second part of (PTP) UUID and sequence number
+ * @hwtimestamp: Event timestamp
+ */
+struct efx_ptp_event_rx {
+ struct list_head link;
+ u32 seq0;
+ u32 seq1;
+ ktime_t hwtimestamp;
+ unsigned long expiry;
+};
+
+/**
+ * struct efx_ptp_timeset - Synchronisation between host and MC
+ * @host_start: Host time immediately before hardware timestamp taken
+ * @seconds: Hardware timestamp, seconds
+ * @nanoseconds: Hardware timestamp, nanoseconds
+ * @host_end: Host time immediately after hardware timestamp taken
+ * @waitns: Number of nanoseconds between hardware timestamp being read and
+ * host end time being seen
+ * @window: Difference of host_end and host_start
+ * @valid: Whether this timeset is valid
+ */
+struct efx_ptp_timeset {
+ u32 host_start;
+ u32 seconds;
+ u32 nanoseconds;
+ u32 host_end;
+ u32 waitns;
+ u32 window; /* Derived: end - start, allowing for wrap */
+};
+
+/**
+ * struct efx_ptp_data - Precision Time Protocol (PTP) state
+ * @channel: The PTP channel
+ * @rxq: Receive queue (awaiting timestamps)
+ * @txq: Transmit queue
+ * @evt_list: List of MC receive events awaiting packets
+ * @evt_free_list: List of free events
+ * @evt_lock: Lock for manipulating evt_list and evt_free_list
+ * @rx_evts: Instantiated events (on evt_list and evt_free_list)
+ * @workwq: Work queue for processing pending PTP operations
+ * @work: Work task
+ * @reset_required: A serious error has occurred and the PTP task needs to be
+ * reset (disable, enable).
+ * @rxfilter_event: Receive filter when operating
+ * @rxfilter_general: Receive filter when operating
+ * @config: Current timestamp configuration
+ * @enabled: PTP operation enabled
+ * @mode: Mode in which PTP operating (PTP version)
+ * @evt_frags: Partly assembled PTP events
+ * @evt_frag_idx: Current fragment number
+ * @evt_code: Last event code
+ * @start: Address at which MC indicates ready for synchronisation
+ * @host_time_pps: Host time at last PPS
+ * @last_sync_ns: Last number of nanoseconds between readings when synchronising
+ * @base_sync_ns: Number of nanoseconds for last synchronisation.
+ * @base_sync_valid: Whether base_sync_time is valid.
+ * @current_adjfreq: Current ppb adjustment.
+ * @phc_clock: Pointer to registered phc device
+ * @phc_clock_info: Registration structure for phc device
+ * @pps_work: pps work task for handling pps events
+ * @pps_workwq: pps work queue
+ * @nic_ts_enabled: Flag indicating if NIC generated TS events are handled
+ * @txbuf: Buffer for use when transmitting (PTP) packets to MC (avoids
+ * allocations in main data path).
+ * @debug_ptp_dir: PTP debugfs directory
+ * @missed_rx_sync: Number of packets received without syncrhonisation.
+ * @good_syncs: Number of successful synchronisations.
+ * @no_time_syncs: Number of synchronisations with no good times.
+ * @bad_sync_durations: Number of synchronisations with bad durations.
+ * @bad_syncs: Number of failed synchronisations.
+ * @last_sync_time: Number of nanoseconds for last synchronisation.
+ * @sync_timeouts: Number of synchronisation timeouts
+ * @fast_syncs: Number of synchronisations requiring short delay
+ * @min_sync_delta: Minimum time between event and synchronisation
+ * @max_sync_delta: Maximum time between event and synchronisation
+ * @average_sync_delta: Average time between event and synchronisation.
+ * Modified moving average.
+ * @last_sync_delta: Last time between event and synchronisation
+ * @mc_stats: Context value for MC statistics
+ * @timeset: Last set of synchronisation statistics.
+ */
+struct efx_ptp_data {
+ struct efx_channel *channel;
+ struct sk_buff_head rxq;
+ struct sk_buff_head txq;
+ struct list_head evt_list;
+ struct list_head evt_free_list;
+ spinlock_t evt_lock;
+ struct efx_ptp_event_rx rx_evts[MAX_RECEIVE_EVENTS];
+ struct workqueue_struct *workwq;
+ struct work_struct work;
+ bool reset_required;
+ u32 rxfilter_event;
+ u32 rxfilter_general;
+ bool rxfilter_installed;
+ struct hwtstamp_config config;
+ bool enabled;
+ unsigned int mode;
+ efx_qword_t evt_frags[MAX_EVENT_FRAGS];
+ int evt_frag_idx;
+ int evt_code;
+ struct efx_buffer start;
+ struct pps_event_time host_time_pps;
+ unsigned last_sync_ns;
+ unsigned base_sync_ns;
+ bool base_sync_valid;
+ s64 current_adjfreq;
+ struct ptp_clock *phc_clock;
+ struct ptp_clock_info phc_clock_info;
+ struct work_struct pps_work;
+ struct workqueue_struct *pps_workwq;
+ bool nic_ts_enabled;
+ u8 txbuf[ALIGN(MC_CMD_PTP_IN_TRANSMIT_LEN(
+ MC_CMD_PTP_IN_TRANSMIT_PACKET_MAXNUM), 4)];
+ struct efx_ptp_timeset
+ timeset[MC_CMD_PTP_OUT_SYNCHRONIZE_TIMESET_MAXNUM];
+};
+
+static int efx_phc_adjfreq(struct ptp_clock_info *ptp, s32 delta);
+static int efx_phc_adjtime(struct ptp_clock_info *ptp, s64 delta);
+static int efx_phc_gettime(struct ptp_clock_info *ptp, struct timespec *ts);
+static int efx_phc_settime(struct ptp_clock_info *ptp,
+ const struct timespec *e_ts);
+static int efx_phc_enable(struct ptp_clock_info *ptp,
+ struct ptp_clock_request *request, int on);
+
+/* Enable MCDI PTP support. */
+static int efx_ptp_enable(struct efx_nic *efx)
+{
+ u8 inbuf[MC_CMD_PTP_IN_ENABLE_LEN];
+
+ MCDI_SET_DWORD(inbuf, PTP_IN_OP, MC_CMD_PTP_OP_ENABLE);
+ MCDI_SET_DWORD(inbuf, PTP_IN_ENABLE_QUEUE,
+ efx->ptp_data->channel->channel);
+ MCDI_SET_DWORD(inbuf, PTP_IN_ENABLE_MODE, efx->ptp_data->mode);
+
+ return efx_mcdi_rpc(efx, MC_CMD_PTP, inbuf, sizeof(inbuf),
+ NULL, 0, NULL);
+}
+
+/* Disable MCDI PTP support.
+ *
+ * Note that this function should never rely on the presence of ptp_data -
+ * may be called before that exists.
+ */
+static int efx_ptp_disable(struct efx_nic *efx)
+{
+ u8 inbuf[MC_CMD_PTP_IN_DISABLE_LEN];
+
+ MCDI_SET_DWORD(inbuf, PTP_IN_OP, MC_CMD_PTP_OP_DISABLE);
+ return efx_mcdi_rpc(efx, MC_CMD_PTP, inbuf, sizeof(inbuf),
+ NULL, 0, NULL);
+}
+
+static void efx_ptp_deliver_rx_queue(struct sk_buff_head *q)
+{
+ struct sk_buff *skb;
+
+ while ((skb = skb_dequeue(q))) {
+ local_bh_disable();
+ netif_receive_skb(skb);
+ local_bh_enable();
+ }
+}
+
+static void efx_ptp_handle_no_channel(struct efx_nic *efx)
+{
+ netif_err(efx, drv, efx->net_dev,
+ "ERROR: PTP requires MSI-X and 1 additional interrupt"
+ "vector. PTP disabled\n");
+}
+
+/* Repeatedly send the host time to the MC which will capture the hardware
+ * time.
+ */
+static void efx_ptp_send_times(struct efx_nic *efx,
+ struct pps_event_time *last_time)
+{
+ struct pps_event_time now;
+ struct timespec limit;
+ struct efx_ptp_data *ptp = efx->ptp_data;
+ struct timespec start;
+ int *mc_running = ptp->start.addr;
+
+ pps_get_ts(&now);
+ start = now.ts_real;
+ limit = now.ts_real;
+ timespec_add_ns(&limit, SYNCHRONISE_PERIOD_NS);
+
+ /* Write host time for specified period or until MC is done */
+ while ((timespec_compare(&now.ts_real, &limit) < 0) &&
+ ACCESS_ONCE(*mc_running)) {
+ struct timespec update_time;
+ unsigned int host_time;
+
+ /* Don't update continuously to avoid saturating the PCIe bus */
+ update_time = now.ts_real;
+ timespec_add_ns(&update_time, SYNCHRONISATION_GRANULARITY_NS);
+ do {
+ pps_get_ts(&now);
+ } while ((timespec_compare(&now.ts_real, &update_time) < 0) &&
+ ACCESS_ONCE(*mc_running));
+
+ /* Synchronise NIC with single word of time only */
+ host_time = (now.ts_real.tv_sec << MC_NANOSECOND_BITS |
+ now.ts_real.tv_nsec);
+ /* Update host time in NIC memory */
+ _efx_writed(efx, cpu_to_le32(host_time),
+ FR_CZ_MC_TREG_SMEM + MC_SMEM_P0_PTP_TIME_OFST);
+ }
+ *last_time = now;
+}
+
+/* Read a timeset from the MC's results and partial process. */
+static void efx_ptp_read_timeset(u8 *data, struct efx_ptp_timeset *timeset)
+{
+ unsigned start_ns, end_ns;
+
+ timeset->host_start = MCDI_DWORD(data, PTP_OUT_SYNCHRONIZE_HOSTSTART);
+ timeset->seconds = MCDI_DWORD(data, PTP_OUT_SYNCHRONIZE_SECONDS);
+ timeset->nanoseconds = MCDI_DWORD(data,
+ PTP_OUT_SYNCHRONIZE_NANOSECONDS);
+ timeset->host_end = MCDI_DWORD(data, PTP_OUT_SYNCHRONIZE_HOSTEND),
+ timeset->waitns = MCDI_DWORD(data, PTP_OUT_SYNCHRONIZE_WAITNS);
+
+ /* Ignore seconds */
+ start_ns = timeset->host_start & MC_NANOSECOND_MASK;
+ end_ns = timeset->host_end & MC_NANOSECOND_MASK;
+ /* Allow for rollover */
+ if (end_ns < start_ns)
+ end_ns += NSEC_PER_SEC;
+ /* Determine duration of operation */
+ timeset->window = end_ns - start_ns;
+}
+
+/* Process times received from MC.
+ *
+ * Extract times from returned results, and establish the minimum value
+ * seen. The minimum value represents the "best" possible time and events
+ * too much greater than this are rejected - the machine is, perhaps, too
+ * busy. A number of readings are taken so that, hopefully, at least one good
+ * synchronisation will be seen in the results.
+ */
+static int efx_ptp_process_times(struct efx_nic *efx, u8 *synch_buf,
+ size_t response_length,
+ const struct pps_event_time *last_time)
+{
+ unsigned number_readings = (response_length /
+ MC_CMD_PTP_OUT_SYNCHRONIZE_TIMESET_LEN);
+ unsigned i;
+ unsigned min;
+ unsigned min_set = 0;
+ unsigned total;
+ unsigned ngood = 0;
+ unsigned last_good = 0;
+ struct efx_ptp_data *ptp = efx->ptp_data;
+ bool min_valid = false;
+ u32 last_sec;
+ u32 start_sec;
+ struct timespec delta;
+
+ if (number_readings == 0)
+ return -EAGAIN;
+
+ /* Find minimum value in this set of results, discarding clearly
+ * erroneous results.
+ */
+ for (i = 0; i < number_readings; i++) {
+ efx_ptp_read_timeset(synch_buf, &ptp->timeset[i]);
+ synch_buf += MC_CMD_PTP_OUT_SYNCHRONIZE_TIMESET_LEN;
+ if (ptp->timeset[i].window > SYNCHRONISATION_GRANULARITY_NS) {
+ if (min_valid) {
+ if (ptp->timeset[i].window < min_set)
+ min_set = ptp->timeset[i].window;
+ } else {
+ min_valid = true;
+ min_set = ptp->timeset[i].window;
+ }
+ }
+ }
+
+ if (min_valid) {
+ if (ptp->base_sync_valid && (min_set > ptp->base_sync_ns))
+ min = ptp->base_sync_ns;
+ else
+ min = min_set;
+ } else {
+ min = SYNCHRONISATION_GRANULARITY_NS;
+ }
+
+ /* Discard excessively long synchronise durations. The MC times
+ * when it finishes reading the host time so the corrected window
+ * time should be fairly constant for a given platform.
+ */
+ total = 0;
+ for (i = 0; i < number_readings; i++)
+ if (ptp->timeset[i].window > ptp->timeset[i].waitns) {
+ unsigned win;
+
+ win = ptp->timeset[i].window - ptp->timeset[i].waitns;
+ if (win >= MIN_SYNCHRONISATION_NS &&
+ win < MAX_SYNCHRONISATION_NS) {
+ total += ptp->timeset[i].window;
+ ngood++;
+ last_good = i;
+ }
+ }
+
+ if (ngood == 0) {
+ netif_warn(efx, drv, efx->net_dev,
+ "PTP no suitable synchronisations %dns %dns\n",
+ ptp->base_sync_ns, min_set);
+ return -EAGAIN;
+ }
+
+ /* Average minimum this synchronisation */
+ ptp->last_sync_ns = DIV_ROUND_UP(total, ngood);
+ if (!ptp->base_sync_valid || (ptp->last_sync_ns < ptp->base_sync_ns)) {
+ ptp->base_sync_valid = true;
+ ptp->base_sync_ns = ptp->last_sync_ns;
+ }
+
+ /* Calculate delay from actual PPS to last_time */
+ delta.tv_nsec =
+ ptp->timeset[last_good].nanoseconds +
+ last_time->ts_real.tv_nsec -
+ (ptp->timeset[last_good].host_start & MC_NANOSECOND_MASK);
+
+ /* It is possible that the seconds rolled over between taking
+ * the start reading and the last value written by the host. The
+ * timescales are such that a gap of more than one second is never
+ * expected.
+ */
+ start_sec = ptp->timeset[last_good].host_start >> MC_NANOSECOND_BITS;
+ last_sec = last_time->ts_real.tv_sec & MC_SECOND_MASK;
+ if (start_sec != last_sec) {
+ if (((start_sec + 1) & MC_SECOND_MASK) != last_sec) {
+ netif_warn(efx, hw, efx->net_dev,
+ "PTP bad synchronisation seconds\n");
+ return -EAGAIN;
+ } else {
+ delta.tv_sec = 1;
+ }
+ } else {
+ delta.tv_sec = 0;
+ }
+
+ ptp->host_time_pps = *last_time;
+ pps_sub_ts(&ptp->host_time_pps, delta);
+
+ return 0;
+}
+
+/* Synchronize times between the host and the MC */
+static int efx_ptp_synchronize(struct efx_nic *efx, unsigned int num_readings)
+{
+ struct efx_ptp_data *ptp = efx->ptp_data;
+ u8 synch_buf[MC_CMD_PTP_OUT_SYNCHRONIZE_LENMAX];
+ size_t response_length;
+ int rc;
+ unsigned long timeout;
+ struct pps_event_time last_time = {};
+ unsigned int loops = 0;
+ int *start = ptp->start.addr;
+
+ MCDI_SET_DWORD(synch_buf, PTP_IN_OP, MC_CMD_PTP_OP_SYNCHRONIZE);
+ MCDI_SET_DWORD(synch_buf, PTP_IN_SYNCHRONIZE_NUMTIMESETS,
+ num_readings);
+ MCDI_SET_DWORD(synch_buf, PTP_IN_SYNCHRONIZE_START_ADDR_LO,
+ (u32)ptp->start.dma_addr);
+ MCDI_SET_DWORD(synch_buf, PTP_IN_SYNCHRONIZE_START_ADDR_HI,
+ (u32)((u64)ptp->start.dma_addr >> 32));
+
+ /* Clear flag that signals MC ready */
+ ACCESS_ONCE(*start) = 0;
+ efx_mcdi_rpc_start(efx, MC_CMD_PTP, synch_buf,
+ MC_CMD_PTP_IN_SYNCHRONIZE_LEN);
+
+ /* Wait for start from MCDI (or timeout) */
+ timeout = jiffies + msecs_to_jiffies(MAX_SYNCHRONISE_WAIT_MS);
+ while (!ACCESS_ONCE(*start) && (time_before(jiffies, timeout))) {
+ udelay(20); /* Usually start MCDI execution quickly */
+ loops++;
+ }
+
+ if (ACCESS_ONCE(*start))
+ efx_ptp_send_times(efx, &last_time);
+
+ /* Collect results */
+ rc = efx_mcdi_rpc_finish(efx, MC_CMD_PTP,
+ MC_CMD_PTP_IN_SYNCHRONIZE_LEN,
+ synch_buf, sizeof(synch_buf),
+ &response_length);
+ if (rc == 0)
+ rc = efx_ptp_process_times(efx, synch_buf, response_length,
+ &last_time);
+
+ return rc;
+}
+
+/* Transmit a PTP packet, via the MCDI interface, to the wire. */
+static int efx_ptp_xmit_skb(struct efx_nic *efx, struct sk_buff *skb)
+{
+ u8 *txbuf = efx->ptp_data->txbuf;
+ struct skb_shared_hwtstamps timestamps;
+ int rc = -EIO;
+ /* MCDI driver requires word aligned lengths */
+ size_t len = ALIGN(MC_CMD_PTP_IN_TRANSMIT_LEN(skb->len), 4);
+ u8 txtime[MC_CMD_PTP_OUT_TRANSMIT_LEN];
+
+ MCDI_SET_DWORD(txbuf, PTP_IN_OP, MC_CMD_PTP_OP_TRANSMIT);
+ MCDI_SET_DWORD(txbuf, PTP_IN_TRANSMIT_LENGTH, skb->len);
+ if (skb_shinfo(skb)->nr_frags != 0) {
+ rc = skb_linearize(skb);
+ if (rc != 0)
+ goto fail;
+ }
+
+ if (skb->ip_summed == CHECKSUM_PARTIAL) {
+ rc = skb_checksum_help(skb);
+ if (rc != 0)
+ goto fail;
+ }
+ skb_copy_from_linear_data(skb,
+ &txbuf[MC_CMD_PTP_IN_TRANSMIT_PACKET_OFST],
+ len);
+ rc = efx_mcdi_rpc(efx, MC_CMD_PTP, txbuf, len, txtime,
+ sizeof(txtime), &len);
+ if (rc != 0)
+ goto fail;
+
+ memset(&timestamps, 0, sizeof(timestamps));
+ timestamps.hwtstamp = ktime_set(
+ MCDI_DWORD(txtime, PTP_OUT_TRANSMIT_SECONDS),
+ MCDI_DWORD(txtime, PTP_OUT_TRANSMIT_NANOSECONDS));
+
+ skb_tstamp_tx(skb, &timestamps);
+
+ rc = 0;
+
+fail:
+ dev_kfree_skb(skb);
+
+ return rc;
+}
+
+static void efx_ptp_drop_time_expired_events(struct efx_nic *efx)
+{
+ struct efx_ptp_data *ptp = efx->ptp_data;
+ struct list_head *cursor;
+ struct list_head *next;
+
+ /* Drop time-expired events */
+ spin_lock_bh(&ptp->evt_lock);
+ if (!list_empty(&ptp->evt_list)) {
+ list_for_each_safe(cursor, next, &ptp->evt_list) {
+ struct efx_ptp_event_rx *evt;
+
+ evt = list_entry(cursor, struct efx_ptp_event_rx,
+ link);
+ if (time_after(jiffies, evt->expiry)) {
+ list_del(&evt->link);
+ list_add(&evt->link, &ptp->evt_free_list);
+ netif_warn(efx, hw, efx->net_dev,
+ "PTP rx event dropped\n");
+ }
+ }
+ }
+ spin_unlock_bh(&ptp->evt_lock);
+}
+
+static enum ptp_packet_state efx_ptp_match_rx(struct efx_nic *efx,
+ struct sk_buff *skb)
+{
+ struct efx_ptp_data *ptp = efx->ptp_data;
+ bool evts_waiting;
+ struct list_head *cursor;
+ struct list_head *next;
+ struct efx_ptp_match *match;
+ enum ptp_packet_state rc = PTP_PACKET_STATE_UNMATCHED;
+
+ spin_lock_bh(&ptp->evt_lock);
+ evts_waiting = !list_empty(&ptp->evt_list);
+ spin_unlock_bh(&ptp->evt_lock);
+
+ if (!evts_waiting)
+ return PTP_PACKET_STATE_UNMATCHED;
+
+ match = (struct efx_ptp_match *)skb->cb;
+ /* Look for a matching timestamp in the event queue */
+ spin_lock_bh(&ptp->evt_lock);
+ list_for_each_safe(cursor, next, &ptp->evt_list) {
+ struct efx_ptp_event_rx *evt;
+
+ evt = list_entry(cursor, struct efx_ptp_event_rx, link);
+ if ((evt->seq0 == match->words[0]) &&
+ (evt->seq1 == match->words[1])) {
+ struct skb_shared_hwtstamps *timestamps;
+
+ /* Match - add in hardware timestamp */
+ timestamps = skb_hwtstamps(skb);
+ timestamps->hwtstamp = evt->hwtimestamp;
+
+ match->state = PTP_PACKET_STATE_MATCHED;
+ rc = PTP_PACKET_STATE_MATCHED;
+ list_del(&evt->link);
+ list_add(&evt->link, &ptp->evt_free_list);
+ break;
+ }
+ }
+ spin_unlock_bh(&ptp->evt_lock);
+
+ return rc;
+}
+
+/* Process any queued receive events and corresponding packets
+ *
+ * q is returned with all the packets that are ready for delivery.
+ * true is returned if at least one of those packets requires
+ * synchronisation.
+ */
+static bool efx_ptp_process_events(struct efx_nic *efx, struct sk_buff_head *q)
+{
+ struct efx_ptp_data *ptp = efx->ptp_data;
+ bool rc = false;
+ struct sk_buff *skb;
+
+ while ((skb = skb_dequeue(&ptp->rxq))) {
+ struct efx_ptp_match *match;
+
+ match = (struct efx_ptp_match *)skb->cb;
+ if (match->state == PTP_PACKET_STATE_MATCH_UNWANTED) {
+ __skb_queue_tail(q, skb);
+ } else if (efx_ptp_match_rx(efx, skb) ==
+ PTP_PACKET_STATE_MATCHED) {
+ rc = true;
+ __skb_queue_tail(q, skb);
+ } else if (time_after(jiffies, match->expiry)) {
+ match->state = PTP_PACKET_STATE_TIMED_OUT;
+ netif_warn(efx, rx_err, efx->net_dev,
+ "PTP packet - no timestamp seen\n");
+ __skb_queue_tail(q, skb);
+ } else {
+ /* Replace unprocessed entry and stop */
+ skb_queue_head(&ptp->rxq, skb);
+ break;
+ }
+ }
+
+ return rc;
+}
+
+/* Complete processing of a received packet */
+static inline void efx_ptp_process_rx(struct efx_nic *efx, struct sk_buff *skb)
+{
+ local_bh_disable();
+ netif_receive_skb(skb);
+ local_bh_enable();
+}
+
+static int efx_ptp_start(struct efx_nic *efx)
+{
+ struct efx_ptp_data *ptp = efx->ptp_data;
+ struct efx_filter_spec rxfilter;
+ int rc;
+
+ ptp->reset_required = false;
+
+ /* Must filter on both event and general ports to ensure
+ * that there is no packet re-ordering.
+ */
+ efx_filter_init_rx(&rxfilter, EFX_FILTER_PRI_REQUIRED, 0,
+ efx_rx_queue_index(
+ efx_channel_get_rx_queue(ptp->channel)));
+ rc = efx_filter_set_ipv4_local(&rxfilter, IPPROTO_UDP,
+ htonl(PTP_ADDRESS),
+ htons(PTP_EVENT_PORT));
+ if (rc != 0)
+ return rc;
+
+ rc = efx_filter_insert_filter(efx, &rxfilter, true);
+ if (rc < 0)
+ return rc;
+ ptp->rxfilter_event = rc;
+
+ efx_filter_init_rx(&rxfilter, EFX_FILTER_PRI_REQUIRED, 0,
+ efx_rx_queue_index(
+ efx_channel_get_rx_queue(ptp->channel)));
+ rc = efx_filter_set_ipv4_local(&rxfilter, IPPROTO_UDP,
+ htonl(PTP_ADDRESS),
+ htons(PTP_GENERAL_PORT));
+ if (rc != 0)
+ goto fail;
+
+ rc = efx_filter_insert_filter(efx, &rxfilter, true);
+ if (rc < 0)
+ goto fail;
+ ptp->rxfilter_general = rc;
+
+ rc = efx_ptp_enable(efx);
+ if (rc != 0)
+ goto fail2;
+
+ ptp->evt_frag_idx = 0;
+ ptp->current_adjfreq = 0;
+ ptp->rxfilter_installed = true;
+
+ return 0;
+
+fail2:
+ efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED,
+ ptp->rxfilter_general);
+fail:
+ efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED,
+ ptp->rxfilter_event);
+
+ return rc;
+}
+
+static int efx_ptp_stop(struct efx_nic *efx)
+{
+ struct efx_ptp_data *ptp = efx->ptp_data;
+ int rc = efx_ptp_disable(efx);
+ struct list_head *cursor;
+ struct list_head *next;
+
+ if (ptp->rxfilter_installed) {
+ efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED,
+ ptp->rxfilter_general);
+ efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED,
+ ptp->rxfilter_event);
+ ptp->rxfilter_installed = false;
+ }
+
+ /* Make sure RX packets are really delivered */
+ efx_ptp_deliver_rx_queue(&efx->ptp_data->rxq);
+ skb_queue_purge(&efx->ptp_data->txq);
+
+ /* Drop any pending receive events */
+ spin_lock_bh(&efx->ptp_data->evt_lock);
+ list_for_each_safe(cursor, next, &efx->ptp_data->evt_list) {
+ list_del(cursor);
+ list_add(cursor, &efx->ptp_data->evt_free_list);
+ }
+ spin_unlock_bh(&efx->ptp_data->evt_lock);
+
+ return rc;
+}
+
+static void efx_ptp_pps_worker(struct work_struct *work)
+{
+ struct efx_ptp_data *ptp =
+ container_of(work, struct efx_ptp_data, pps_work);
+ struct efx_nic *efx = ptp->channel->efx;
+ struct ptp_clock_event ptp_evt;
+
+ if (efx_ptp_synchronize(efx, PTP_SYNC_ATTEMPTS))
+ return;
+
+ ptp_evt.type = PTP_CLOCK_PPSUSR;
+ ptp_evt.pps_times = ptp->host_time_pps;
+ ptp_clock_event(ptp->phc_clock, &ptp_evt);
+}
+
+/* Process any pending transmissions and timestamp any received packets.
+ */
+static void efx_ptp_worker(struct work_struct *work)
+{
+ struct efx_ptp_data *ptp_data =
+ container_of(work, struct efx_ptp_data, work);
+ struct efx_nic *efx = ptp_data->channel->efx;
+ struct sk_buff *skb;
+ struct sk_buff_head tempq;
+
+ if (ptp_data->reset_required) {
+ efx_ptp_stop(efx);
+ efx_ptp_start(efx);
+ return;
+ }
+
+ efx_ptp_drop_time_expired_events(efx);
+
+ __skb_queue_head_init(&tempq);
+ if (efx_ptp_process_events(efx, &tempq) ||
+ !skb_queue_empty(&ptp_data->txq)) {
+
+ while ((skb = skb_dequeue(&ptp_data->txq)))
+ efx_ptp_xmit_skb(efx, skb);
+ }
+
+ while ((skb = __skb_dequeue(&tempq)))
+ efx_ptp_process_rx(efx, skb);
+}
+
+/* Initialise PTP channel and state.
+ *
+ * Setting core_index to zero causes the queue to be initialised and doesn't
+ * overlap with 'rxq0' because ptp.c doesn't use skb_record_rx_queue.
+ */
+static int efx_ptp_probe_channel(struct efx_channel *channel)
+{
+ struct efx_nic *efx = channel->efx;
+ struct efx_ptp_data *ptp;
+ int rc = 0;
+ unsigned int pos;
+
+ channel->irq_moderation = 0;
+ channel->rx_queue.core_index = 0;
+
+ ptp = kzalloc(sizeof(struct efx_ptp_data), GFP_KERNEL);
+ efx->ptp_data = ptp;
+ if (!efx->ptp_data)
+ return -ENOMEM;
+
+ rc = efx_nic_alloc_buffer(efx, &ptp->start, sizeof(int));
+ if (rc != 0)
+ goto fail1;
+
+ ptp->channel = channel;
+ skb_queue_head_init(&ptp->rxq);
+ skb_queue_head_init(&ptp->txq);
+ ptp->workwq = create_singlethread_workqueue("sfc_ptp");
+ if (!ptp->workwq) {
+ rc = -ENOMEM;
+ goto fail2;
+ }
+
+ INIT_WORK(&ptp->work, efx_ptp_worker);
+ ptp->config.flags = 0;
+ ptp->config.tx_type = HWTSTAMP_TX_OFF;
+ ptp->config.rx_filter = HWTSTAMP_FILTER_NONE;
+ INIT_LIST_HEAD(&ptp->evt_list);
+ INIT_LIST_HEAD(&ptp->evt_free_list);
+ spin_lock_init(&ptp->evt_lock);
+ for (pos = 0; pos < MAX_RECEIVE_EVENTS; pos++)
+ list_add(&ptp->rx_evts[pos].link, &ptp->evt_free_list);
+
+ ptp->phc_clock_info.owner = THIS_MODULE;
+ snprintf(ptp->phc_clock_info.name,
+ sizeof(ptp->phc_clock_info.name),
+ "%pm", efx->net_dev->perm_addr);
+ ptp->phc_clock_info.max_adj = MAX_PPB;
+ ptp->phc_clock_info.n_alarm = 0;
+ ptp->phc_clock_info.n_ext_ts = 0;
+ ptp->phc_clock_info.n_per_out = 0;
+ ptp->phc_clock_info.pps = 1;
+ ptp->phc_clock_info.adjfreq = efx_phc_adjfreq;
+ ptp->phc_clock_info.adjtime = efx_phc_adjtime;
+ ptp->phc_clock_info.gettime = efx_phc_gettime;
+ ptp->phc_clock_info.settime = efx_phc_settime;
+ ptp->phc_clock_info.enable = efx_phc_enable;
+
+ ptp->phc_clock = ptp_clock_register(&ptp->phc_clock_info);
+ if (!ptp->phc_clock)
+ goto fail3;
+
+ INIT_WORK(&ptp->pps_work, efx_ptp_pps_worker);
+ ptp->pps_workwq = create_singlethread_workqueue("sfc_pps");
+ if (!ptp->pps_workwq) {
+ rc = -ENOMEM;
+ goto fail4;
+ }
+ ptp->nic_ts_enabled = false;
+
+ return 0;
+fail4:
+ ptp_clock_unregister(efx->ptp_data->phc_clock);
+
+fail3:
+ destroy_workqueue(efx->ptp_data->workwq);
+
+fail2:
+ efx_nic_free_buffer(efx, &ptp->start);
+
+fail1:
+ kfree(efx->ptp_data);
+ efx->ptp_data = NULL;
+
+ return rc;
+}
+
+static void efx_ptp_remove_channel(struct efx_channel *channel)
+{
+ struct efx_nic *efx = channel->efx;
+
+ if (!efx->ptp_data)
+ return;
+
+ (void)efx_ptp_disable(channel->efx);
+
+ cancel_work_sync(&efx->ptp_data->work);
+ cancel_work_sync(&efx->ptp_data->pps_work);
+
+ skb_queue_purge(&efx->ptp_data->rxq);
+ skb_queue_purge(&efx->ptp_data->txq);
+
+ ptp_clock_unregister(efx->ptp_data->phc_clock);
+
+ destroy_workqueue(efx->ptp_data->workwq);
+ destroy_workqueue(efx->ptp_data->pps_workwq);
+
+ efx_nic_free_buffer(efx, &efx->ptp_data->start);
+ kfree(efx->ptp_data);
+}
+
+static void efx_ptp_get_channel_name(struct efx_channel *channel,
+ char *buf, size_t len)
+{
+ snprintf(buf, len, "%s-ptp", channel->efx->name);
+}
+
+/* Determine whether this packet should be processed by the PTP module
+ * or transmitted conventionally.
+ */
+bool efx_ptp_is_ptp_tx(struct efx_nic *efx, struct sk_buff *skb)
+{
+ return efx->ptp_data &&
+ efx->ptp_data->enabled &&
+ skb->len >= PTP_MIN_LENGTH &&
+ skb->len <= MC_CMD_PTP_IN_TRANSMIT_PACKET_MAXNUM &&
+ likely(skb->protocol == htons(ETH_P_IP)) &&
+ ip_hdr(skb)->protocol == IPPROTO_UDP &&
+ udp_hdr(skb)->dest == htons(PTP_EVENT_PORT);
+}
+
+/* Receive a PTP packet. Packets are queued until the arrival of
+ * the receive timestamp from the MC - this will probably occur after the
+ * packet arrival because of the processing in the MC.
+ */
+static void efx_ptp_rx(struct efx_channel *channel, struct sk_buff *skb)
+{
+ struct efx_nic *efx = channel->efx;
+ struct efx_ptp_data *ptp = efx->ptp_data;
+ struct efx_ptp_match *match = (struct efx_ptp_match *)skb->cb;
+ u8 *data;
+ unsigned int version;
+
+ match->expiry = jiffies + msecs_to_jiffies(PKT_EVENT_LIFETIME_MS);
+
+ /* Correct version? */
+ if (ptp->mode == MC_CMD_PTP_MODE_V1) {
+ if (skb->len < PTP_V1_MIN_LENGTH) {
+ netif_receive_skb(skb);
+ return;
+ }
+ version = ntohs(*(__be16 *)&skb->data[PTP_V1_VERSION_OFFSET]);
+ if (version != PTP_VERSION_V1) {
+ netif_receive_skb(skb);
+ return;
+ }
+ } else {
+ if (skb->len < PTP_V2_MIN_LENGTH) {
+ netif_receive_skb(skb);
+ return;
+ }
+ version = skb->data[PTP_V2_VERSION_OFFSET];
+
+ BUG_ON(ptp->mode != MC_CMD_PTP_MODE_V2);
+ BUILD_BUG_ON(PTP_V1_UUID_OFFSET != PTP_V2_MC_UUID_OFFSET);
+ BUILD_BUG_ON(PTP_V1_UUID_LENGTH != PTP_V2_MC_UUID_LENGTH);
+ BUILD_BUG_ON(PTP_V1_SEQUENCE_OFFSET != PTP_V2_SEQUENCE_OFFSET);
+ BUILD_BUG_ON(PTP_V1_SEQUENCE_LENGTH != PTP_V2_SEQUENCE_LENGTH);
+
+ if ((version & PTP_VERSION_V2_MASK) != PTP_VERSION_V2) {
+ netif_receive_skb(skb);
+ return;
+ }
+ }
+
+ /* Does this packet require timestamping? */
+ if (ntohs(*(__be16 *)&skb->data[PTP_DPORT_OFFSET]) == PTP_EVENT_PORT) {
+ struct skb_shared_hwtstamps *timestamps;
+
+ match->state = PTP_PACKET_STATE_UNMATCHED;
+
+ /* Clear all timestamps held: filled in later */
+ timestamps = skb_hwtstamps(skb);
+ memset(timestamps, 0, sizeof(*timestamps));
+
+ /* Extract UUID/Sequence information */
+ data = skb->data + PTP_V1_UUID_OFFSET;
+ match->words[0] = (data[0] |
+ (data[1] << 8) |
+ (data[2] << 16) |
+ (data[3] << 24));
+ match->words[1] = (data[4] |
+ (data[5] << 8) |
+ (skb->data[PTP_V1_SEQUENCE_OFFSET +
+ PTP_V1_SEQUENCE_LENGTH - 1] <<
+ 16));
+ } else {
+ match->state = PTP_PACKET_STATE_MATCH_UNWANTED;
+ }
+
+ skb_queue_tail(&ptp->rxq, skb);
+ queue_work(ptp->workwq, &ptp->work);
+}
+
+/* Transmit a PTP packet. This has to be transmitted by the MC
+ * itself, through an MCDI call. MCDI calls aren't permitted
+ * in the transmit path so defer the actual transmission to a suitable worker.
+ */
+int efx_ptp_tx(struct efx_nic *efx, struct sk_buff *skb)
+{
+ struct efx_ptp_data *ptp = efx->ptp_data;
+
+ skb_queue_tail(&ptp->txq, skb);
+
+ if ((udp_hdr(skb)->dest == htons(PTP_EVENT_PORT)) &&
+ (skb->len <= MC_CMD_PTP_IN_TRANSMIT_PACKET_MAXNUM))
+ efx_xmit_hwtstamp_pending(skb);
+ queue_work(ptp->workwq, &ptp->work);
+
+ return NETDEV_TX_OK;
+}
+
+static int efx_ptp_change_mode(struct efx_nic *efx, bool enable_wanted,
+ unsigned int new_mode)
+{
+ if ((enable_wanted != efx->ptp_data->enabled) ||
+ (enable_wanted && (efx->ptp_data->mode != new_mode))) {
+ int rc;
+
+ if (enable_wanted) {
+ /* Change of mode requires disable */
+ if (efx->ptp_data->enabled &&
+ (efx->ptp_data->mode != new_mode)) {
+ efx->ptp_data->enabled = false;
+ rc = efx_ptp_stop(efx);
+ if (rc != 0)
+ return rc;
+ }
+
+ /* Set new operating mode and establish
+ * baseline synchronisation, which must
+ * succeed.
+ */
+ efx->ptp_data->mode = new_mode;
+ rc = efx_ptp_start(efx);
+ if (rc == 0) {
+ rc = efx_ptp_synchronize(efx,
+ PTP_SYNC_ATTEMPTS * 2);
+ if (rc != 0)
+ efx_ptp_stop(efx);
+ }
+ } else {
+ rc = efx_ptp_stop(efx);
+ }
+
+ if (rc != 0)
+ return rc;
+
+ efx->ptp_data->enabled = enable_wanted;
+ }
+
+ return 0;
+}
+
+static int efx_ptp_ts_init(struct efx_nic *efx, struct hwtstamp_config *init)
+{
+ bool enable_wanted = false;
+ unsigned int new_mode;
+ int rc;
+
+ if (init->flags)
+ return -EINVAL;
+
+ if ((init->tx_type != HWTSTAMP_TX_OFF) &&
+ (init->tx_type != HWTSTAMP_TX_ON))
+ return -ERANGE;
+
+ new_mode = efx->ptp_data->mode;
+ /* Determine whether any PTP HW operations are required */
+ switch (init->rx_filter) {
+ case HWTSTAMP_FILTER_NONE:
+ break;
+ case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
+ case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
+ case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
+ init->rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT;
+ new_mode = MC_CMD_PTP_MODE_V1;
+ enable_wanted = true;
+ break;
+ case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
+ case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
+ case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
+ /* Although these three are accepted only IPV4 packets will be
+ * timestamped
+ */
+ init->rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_EVENT;
+ new_mode = MC_CMD_PTP_MODE_V2;
+ enable_wanted = true;
+ break;
+ case HWTSTAMP_FILTER_PTP_V2_EVENT:
+ case HWTSTAMP_FILTER_PTP_V2_SYNC:
+ case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
+ case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
+ case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
+ case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
+ /* Non-IP + IPv6 timestamping not supported */
+ return -ERANGE;
+ break;
+ default:
+ return -ERANGE;
+ }
+
+ if (init->tx_type != HWTSTAMP_TX_OFF)
+ enable_wanted = true;
+
+ rc = efx_ptp_change_mode(efx, enable_wanted, new_mode);
+ if (rc != 0)
+ return rc;
+
+ efx->ptp_data->config = *init;
+
+ return 0;
+}
+
+int
+efx_ptp_get_ts_info(struct net_device *net_dev, struct ethtool_ts_info *ts_info)
+{
+ struct efx_nic *efx = netdev_priv(net_dev);
+ struct efx_ptp_data *ptp = efx->ptp_data;
+
+ if (!ptp)
+ return -EOPNOTSUPP;
+
+ ts_info->so_timestamping = (SOF_TIMESTAMPING_TX_HARDWARE |
+ SOF_TIMESTAMPING_RX_HARDWARE |
+ SOF_TIMESTAMPING_RAW_HARDWARE);
+ ts_info->phc_index = ptp_clock_index(ptp->phc_clock);
+ ts_info->tx_types = 1 << HWTSTAMP_TX_OFF | 1 << HWTSTAMP_TX_ON;
+ ts_info->rx_filters = (1 << HWTSTAMP_FILTER_NONE |
+ 1 << HWTSTAMP_FILTER_PTP_V1_L4_EVENT |
+ 1 << HWTSTAMP_FILTER_PTP_V1_L4_SYNC |
+ 1 << HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ |
+ 1 << HWTSTAMP_FILTER_PTP_V2_L4_EVENT |
+ 1 << HWTSTAMP_FILTER_PTP_V2_L4_SYNC |
+ 1 << HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ);
+ return 0;
+}
+
+int efx_ptp_ioctl(struct efx_nic *efx, struct ifreq *ifr, int cmd)
+{
+ struct hwtstamp_config config;
+ int rc;
+
+ /* Not a PTP enabled port */
+ if (!efx->ptp_data)
+ return -EOPNOTSUPP;
+
+ if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
+ return -EFAULT;
+
+ rc = efx_ptp_ts_init(efx, &config);
+ if (rc != 0)
+ return rc;
+
+ return copy_to_user(ifr->ifr_data, &config, sizeof(config))
+ ? -EFAULT : 0;
+}
+
+static void ptp_event_failure(struct efx_nic *efx, int expected_frag_len)
+{
+ struct efx_ptp_data *ptp = efx->ptp_data;
+
+ netif_err(efx, hw, efx->net_dev,
+ "PTP unexpected event length: got %d expected %d\n",
+ ptp->evt_frag_idx, expected_frag_len);
+ ptp->reset_required = true;
+ queue_work(ptp->workwq, &ptp->work);
+}
+
+/* Process a completed receive event. Put it on the event queue and
+ * start worker thread. This is required because event and their
+ * correspoding packets may come in either order.
+ */
+static void ptp_event_rx(struct efx_nic *efx, struct efx_ptp_data *ptp)
+{
+ struct efx_ptp_event_rx *evt = NULL;
+
+ if (ptp->evt_frag_idx != 3) {
+ ptp_event_failure(efx, 3);
+ return;
+ }
+
+ spin_lock_bh(&ptp->evt_lock);
+ if (!list_empty(&ptp->evt_free_list)) {
+ evt = list_first_entry(&ptp->evt_free_list,
+ struct efx_ptp_event_rx, link);
+ list_del(&evt->link);
+
+ evt->seq0 = EFX_QWORD_FIELD(ptp->evt_frags[2], MCDI_EVENT_DATA);
+ evt->seq1 = (EFX_QWORD_FIELD(ptp->evt_frags[2],
+ MCDI_EVENT_SRC) |
+ (EFX_QWORD_FIELD(ptp->evt_frags[1],
+ MCDI_EVENT_SRC) << 8) |
+ (EFX_QWORD_FIELD(ptp->evt_frags[0],
+ MCDI_EVENT_SRC) << 16));
+ evt->hwtimestamp = ktime_set(
+ EFX_QWORD_FIELD(ptp->evt_frags[0], MCDI_EVENT_DATA),
+ EFX_QWORD_FIELD(ptp->evt_frags[1], MCDI_EVENT_DATA));
+ evt->expiry = jiffies + msecs_to_jiffies(PKT_EVENT_LIFETIME_MS);
+ list_add_tail(&evt->link, &ptp->evt_list);
+
+ queue_work(ptp->workwq, &ptp->work);
+ } else {
+ netif_err(efx, rx_err, efx->net_dev, "No free PTP event");
+ }
+ spin_unlock_bh(&ptp->evt_lock);
+}
+
+static void ptp_event_fault(struct efx_nic *efx, struct efx_ptp_data *ptp)
+{
+ int code = EFX_QWORD_FIELD(ptp->evt_frags[0], MCDI_EVENT_DATA);
+ if (ptp->evt_frag_idx != 1) {
+ ptp_event_failure(efx, 1);
+ return;
+ }
+
+ netif_err(efx, hw, efx->net_dev, "PTP error %d\n", code);
+}
+
+static void ptp_event_pps(struct efx_nic *efx, struct efx_ptp_data *ptp)
+{
+ if (ptp->nic_ts_enabled)
+ queue_work(ptp->pps_workwq, &ptp->pps_work);
+}
+
+void efx_ptp_event(struct efx_nic *efx, efx_qword_t *ev)
+{
+ struct efx_ptp_data *ptp = efx->ptp_data;
+ int code = EFX_QWORD_FIELD(*ev, MCDI_EVENT_CODE);
+
+ if (!ptp->enabled)
+ return;
+
+ if (ptp->evt_frag_idx == 0) {
+ ptp->evt_code = code;
+ } else if (ptp->evt_code != code) {
+ netif_err(efx, hw, efx->net_dev,
+ "PTP out of sequence event %d\n", code);
+ ptp->evt_frag_idx = 0;
+ }
+
+ ptp->evt_frags[ptp->evt_frag_idx++] = *ev;
+ if (!MCDI_EVENT_FIELD(*ev, CONT)) {
+ /* Process resulting event */
+ switch (code) {
+ case MCDI_EVENT_CODE_PTP_RX:
+ ptp_event_rx(efx, ptp);
+ break;
+ case MCDI_EVENT_CODE_PTP_FAULT:
+ ptp_event_fault(efx, ptp);
+ break;
+ case MCDI_EVENT_CODE_PTP_PPS:
+ ptp_event_pps(efx, ptp);
+ break;
+ default:
+ netif_err(efx, hw, efx->net_dev,
+ "PTP unknown event %d\n", code);
+ break;
+ }
+ ptp->evt_frag_idx = 0;
+ } else if (MAX_EVENT_FRAGS == ptp->evt_frag_idx) {
+ netif_err(efx, hw, efx->net_dev,
+ "PTP too many event fragments\n");
+ ptp->evt_frag_idx = 0;
+ }
+}
+
+static int efx_phc_adjfreq(struct ptp_clock_info *ptp, s32 delta)
+{
+ struct efx_ptp_data *ptp_data = container_of(ptp,
+ struct efx_ptp_data,
+ phc_clock_info);
+ struct efx_nic *efx = ptp_data->channel->efx;
+ u8 inadj[MC_CMD_PTP_IN_ADJUST_LEN];
+ s64 adjustment_ns;
+ int rc;
+
+ if (delta > MAX_PPB)
+ delta = MAX_PPB;
+ else if (delta < -MAX_PPB)
+ delta = -MAX_PPB;
+
+ /* Convert ppb to fixed point ns. */
+ adjustment_ns = (((s64)delta * PPB_SCALE_WORD) >>
+ (PPB_EXTRA_BITS + MAX_PPB_BITS));
+
+ MCDI_SET_DWORD(inadj, PTP_IN_OP, MC_CMD_PTP_OP_ADJUST);
+ MCDI_SET_DWORD(inadj, PTP_IN_ADJUST_FREQ_LO, (u32)adjustment_ns);
+ MCDI_SET_DWORD(inadj, PTP_IN_ADJUST_FREQ_HI,
+ (u32)(adjustment_ns >> 32));
+ MCDI_SET_DWORD(inadj, PTP_IN_ADJUST_SECONDS, 0);
+ MCDI_SET_DWORD(inadj, PTP_IN_ADJUST_NANOSECONDS, 0);
+ rc = efx_mcdi_rpc(efx, MC_CMD_PTP, inadj, sizeof(inadj),
+ NULL, 0, NULL);
+ if (rc != 0)
+ return rc;
+
+ ptp_data->current_adjfreq = delta;
+ return 0;
+}
+
+static int efx_phc_adjtime(struct ptp_clock_info *ptp, s64 delta)
+{
+ struct efx_ptp_data *ptp_data = container_of(ptp,
+ struct efx_ptp_data,
+ phc_clock_info);
+ struct efx_nic *efx = ptp_data->channel->efx;
+ struct timespec delta_ts = ns_to_timespec(delta);
+ u8 inbuf[MC_CMD_PTP_IN_ADJUST_LEN];
+
+ MCDI_SET_DWORD(inbuf, PTP_IN_OP, MC_CMD_PTP_OP_ADJUST);
+ MCDI_SET_DWORD(inbuf, PTP_IN_ADJUST_FREQ_LO, 0);
+ MCDI_SET_DWORD(inbuf, PTP_IN_ADJUST_FREQ_HI, 0);
+ MCDI_SET_DWORD(inbuf, PTP_IN_ADJUST_SECONDS, (u32)delta_ts.tv_sec);
+ MCDI_SET_DWORD(inbuf, PTP_IN_ADJUST_NANOSECONDS, (u32)delta_ts.tv_nsec);
+ return efx_mcdi_rpc(efx, MC_CMD_PTP, inbuf, sizeof(inbuf),
+ NULL, 0, NULL);
+}
+
+static int efx_phc_gettime(struct ptp_clock_info *ptp, struct timespec *ts)
+{
+ struct efx_ptp_data *ptp_data = container_of(ptp,
+ struct efx_ptp_data,
+ phc_clock_info);
+ struct efx_nic *efx = ptp_data->channel->efx;
+ u8 inbuf[MC_CMD_PTP_IN_READ_NIC_TIME_LEN];
+ u8 outbuf[MC_CMD_PTP_OUT_READ_NIC_TIME_LEN];
+ int rc;
+
+ MCDI_SET_DWORD(inbuf, PTP_IN_OP, MC_CMD_PTP_OP_READ_NIC_TIME);
+
+ rc = efx_mcdi_rpc(efx, MC_CMD_PTP, inbuf, sizeof(inbuf),
+ outbuf, sizeof(outbuf), NULL);
+ if (rc != 0)
+ return rc;
+
+ ts->tv_sec = MCDI_DWORD(outbuf, PTP_OUT_READ_NIC_TIME_SECONDS);
+ ts->tv_nsec = MCDI_DWORD(outbuf, PTP_OUT_READ_NIC_TIME_NANOSECONDS);
+ return 0;
+}
+
+static int efx_phc_settime(struct ptp_clock_info *ptp,
+ const struct timespec *e_ts)
+{
+ /* Get the current NIC time, efx_phc_gettime.
+ * Subtract from the desired time to get the offset
+ * call efx_phc_adjtime with the offset
+ */
+ int rc;
+ struct timespec time_now;
+ struct timespec delta;
+
+ rc = efx_phc_gettime(ptp, &time_now);
+ if (rc != 0)
+ return rc;
+
+ delta = timespec_sub(*e_ts, time_now);
+
+ efx_phc_adjtime(ptp, timespec_to_ns(&delta));
+ if (rc != 0)
+ return rc;
+
+ return 0;
+}
+
+static int efx_phc_enable(struct ptp_clock_info *ptp,
+ struct ptp_clock_request *request,
+ int enable)
+{
+ struct efx_ptp_data *ptp_data = container_of(ptp,
+ struct efx_ptp_data,
+ phc_clock_info);
+ if (request->type != PTP_CLK_REQ_PPS)
+ return -EOPNOTSUPP;
+
+ ptp_data->nic_ts_enabled = !!enable;
+ return 0;
+}
+
+static const struct efx_channel_type efx_ptp_channel_type = {
+ .handle_no_channel = efx_ptp_handle_no_channel,
+ .pre_probe = efx_ptp_probe_channel,
+ .post_remove = efx_ptp_remove_channel,
+ .get_name = efx_ptp_get_channel_name,
+ /* no copy operation; there is no need to reallocate this channel */
+ .receive_skb = efx_ptp_rx,
+ .keep_eventq = false,
+};
+
+void efx_ptp_probe(struct efx_nic *efx)
+{
+ /* Check whether PTP is implemented on this NIC. The DISABLE
+ * operation will succeed if and only if it is implemented.
+ */
+ if (efx_ptp_disable(efx) == 0)
+ efx->extra_channel_type[EFX_EXTRA_CHANNEL_PTP] =
+ &efx_ptp_channel_type;
+}
diff --git a/drivers/net/ethernet/sfc/rx.c b/drivers/net/ethernet/sfc/rx.c
index 719319b89d7a..9e0ad1b75c33 100644
--- a/drivers/net/ethernet/sfc/rx.c
+++ b/drivers/net/ethernet/sfc/rx.c
@@ -479,7 +479,7 @@ static void efx_rx_packet_gro(struct efx_channel *channel,
skb->ip_summed = ((rx_buf->flags & EFX_RX_PKT_CSUMMED) ?
CHECKSUM_UNNECESSARY : CHECKSUM_NONE);
- skb_record_rx_queue(skb, channel->channel);
+ skb_record_rx_queue(skb, channel->rx_queue.core_index);
gro_result = napi_gro_frags(napi);
} else {
@@ -571,8 +571,14 @@ static void efx_rx_deliver(struct efx_channel *channel,
/* Set the SKB flags */
skb_checksum_none_assert(skb);
+ /* Record the rx_queue */
+ skb_record_rx_queue(skb, channel->rx_queue.core_index);
+
/* Pass the packet up */
- netif_receive_skb(skb);
+ if (channel->type->receive_skb)
+ channel->type->receive_skb(channel, skb);
+ else
+ netif_receive_skb(skb);
/* Update allocation strategy method */
channel->rx_alloc_level += RX_ALLOC_FACTOR_SKB;
@@ -608,13 +614,14 @@ void __efx_rx_packet(struct efx_channel *channel, struct efx_rx_buffer *rx_buf)
* at the ethernet header */
skb->protocol = eth_type_trans(skb, efx->net_dev);
- skb_record_rx_queue(skb, channel->channel);
+ skb_record_rx_queue(skb, channel->rx_queue.core_index);
}
if (unlikely(!(efx->net_dev->features & NETIF_F_RXCSUM)))
rx_buf->flags &= ~EFX_RX_PKT_CSUMMED;
- if (likely(rx_buf->flags & (EFX_RX_BUF_PAGE | EFX_RX_PKT_CSUMMED)))
+ if (likely(rx_buf->flags & (EFX_RX_BUF_PAGE | EFX_RX_PKT_CSUMMED)) &&
+ !channel->type->receive_skb)
efx_rx_packet_gro(channel, rx_buf, eh);
else
efx_rx_deliver(channel, rx_buf);
@@ -624,6 +631,11 @@ void efx_rx_strategy(struct efx_channel *channel)
{
enum efx_rx_alloc_method method = rx_alloc_method;
+ if (channel->type->receive_skb) {
+ channel->rx_alloc_push_pages = false;
+ return;
+ }
+
/* Only makes sense to use page based allocation if GRO is enabled */
if (!(channel->efx->net_dev->features & NETIF_F_GRO)) {
method = RX_ALLOC_METHOD_SKB;
diff --git a/drivers/net/ethernet/sfc/siena.c b/drivers/net/ethernet/sfc/siena.c
index 6bafd216e55e..84b41bf08a38 100644
--- a/drivers/net/ethernet/sfc/siena.c
+++ b/drivers/net/ethernet/sfc/siena.c
@@ -335,6 +335,7 @@ static int siena_probe_nic(struct efx_nic *efx)
goto fail5;
efx_sriov_probe(efx);
+ efx_ptp_probe(efx);
return 0;
diff --git a/drivers/net/ethernet/sfc/siena_sriov.c b/drivers/net/ethernet/sfc/siena_sriov.c
index 9cb3b84ecae9..a8f48a455849 100644
--- a/drivers/net/ethernet/sfc/siena_sriov.c
+++ b/drivers/net/ethernet/sfc/siena_sriov.c
@@ -21,6 +21,9 @@
/* Number of longs required to track all the VIs in a VF */
#define VI_MASK_LENGTH BITS_TO_LONGS(1 << EFX_VI_SCALE_MAX)
+/* Maximum number of RX queues supported */
+#define VF_MAX_RX_QUEUES 63
+
/**
* enum efx_vf_tx_filter_mode - TX MAC filtering behaviour
* @VF_TX_FILTER_OFF: Disabled
@@ -578,6 +581,7 @@ static int efx_vfdi_init_rxq(struct efx_vf *vf)
efx_oword_t reg;
if (bad_vf_index(efx, vf_evq) || bad_vf_index(efx, vf_rxq) ||
+ vf_rxq >= VF_MAX_RX_QUEUES ||
bad_buf_count(buf_count, EFX_MAX_DMAQ_SIZE)) {
if (net_ratelimit())
netif_err(efx, hw, efx->net_dev,
@@ -683,6 +687,9 @@ static int efx_vfdi_fini_all_queues(struct efx_vf *vf)
__le32 *rxqs;
int rc;
+ BUILD_BUG_ON(VF_MAX_RX_QUEUES >
+ MC_CMD_FLUSH_RX_QUEUES_IN_QID_OFST_MAXNUM);
+
rxqs = kmalloc(count * sizeof(*rxqs), GFP_KERNEL);
if (rxqs == NULL)
return VFDI_RC_ENOMEM;
diff --git a/drivers/net/ethernet/sfc/tx.c b/drivers/net/ethernet/sfc/tx.c
index ebca75ed78dc..5e090e54298e 100644
--- a/drivers/net/ethernet/sfc/tx.c
+++ b/drivers/net/ethernet/sfc/tx.c
@@ -339,6 +339,12 @@ netdev_tx_t efx_hard_start_xmit(struct sk_buff *skb,
EFX_WARN_ON_PARANOID(!netif_device_present(net_dev));
+ /* PTP "event" packet */
+ if (unlikely(efx_xmit_with_hwtstamp(skb)) &&
+ unlikely(efx_ptp_is_ptp_tx(efx, skb))) {
+ return efx_ptp_tx(efx, skb);
+ }
+
index = skb_get_queue_mapping(skb);
type = skb->ip_summed == CHECKSUM_PARTIAL ? EFX_TXQ_TYPE_OFFLOAD : 0;
if (index >= efx->n_tx_channels) {
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-20 10:37:44 +0000