Merge branch 'linus' into x86/urgent

Merge needed to go past commit 7ca43e756 (mm: use debug_kmap_atomic)
and fix it.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 467 insertions, 0 deletions

diff --git a/drivers/net/ixgbe/ixgbe_dcb_82599.c b/drivers/net/ixgbe/ixgbe_dcb_82599.c
new file mode 100644
index 00000000000..470b676c1da
--- /dev/null
+++ b/drivers/net/ixgbe/ixgbe_dcb_82599.c
@@ -0,0 +1,467 @@
+/*******************************************************************************
+
+  Intel 10 Gigabit PCI Express Linux driver
+  Copyright(c) 1999 - 2009 Intel Corporation.
+
+  This program is free software; you can redistribute it and/or modify it
+  under the terms and conditions of the GNU General Public License,
+  version 2, as published by the Free Software Foundation.
+
+  This program is distributed in the hope it will be useful, but WITHOUT
+  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+  more details.
+
+  You should have received a copy of the GNU General Public License along with
+  this program; if not, write to the Free Software Foundation, Inc.,
+  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+
+  The full GNU General Public License is included in this distribution in
+  the file called "COPYING".
+
+  Contact Information:
+  e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
+  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+
+*******************************************************************************/
+
+#include "ixgbe.h"
+#include "ixgbe_type.h"
+#include "ixgbe_dcb.h"
+#include "ixgbe_dcb_82599.h"
+
+/**
+ * ixgbe_dcb_get_tc_stats_82599 - Returns status for each traffic class
+ * @hw: pointer to hardware structure
+ * @stats: pointer to statistics structure
+ * @tc_count:  Number of elements in bwg_array.
+ *
+ * This function returns the status data for each of the Traffic Classes in use.
+ */
+s32 ixgbe_dcb_get_tc_stats_82599(struct ixgbe_hw *hw,
+                                 struct ixgbe_hw_stats *stats,
+                                 u8 tc_count)
+{
+	int tc;
+
+	if (tc_count > MAX_TRAFFIC_CLASS)
+		return DCB_ERR_PARAM;
+	/* Statistics pertaining to each traffic class */
+	for (tc = 0; tc < tc_count; tc++) {
+		/* Transmitted Packets */
+		stats->qptc[tc] += IXGBE_READ_REG(hw, IXGBE_QPTC(tc));
+		/* Transmitted Bytes */
+		stats->qbtc[tc] += IXGBE_READ_REG(hw, IXGBE_QBTC(tc));
+		/* Received Packets */
+		stats->qprc[tc] += IXGBE_READ_REG(hw, IXGBE_QPRC(tc));
+		/* Received Bytes */
+		stats->qbrc[tc] += IXGBE_READ_REG(hw, IXGBE_QBRC(tc));
+	}
+
+	return 0;
+}
+
+/**
+ * ixgbe_dcb_get_pfc_stats_82599 - Return CBFC status data
+ * @hw: pointer to hardware structure
+ * @stats: pointer to statistics structure
+ * @tc_count:  Number of elements in bwg_array.
+ *
+ * This function returns the CBFC status data for each of the Traffic Classes.
+ */
+s32 ixgbe_dcb_get_pfc_stats_82599(struct ixgbe_hw *hw,
+                                  struct ixgbe_hw_stats *stats,
+                                  u8 tc_count)
+{
+	int tc;
+
+	if (tc_count > MAX_TRAFFIC_CLASS)
+		return DCB_ERR_PARAM;
+	for (tc = 0; tc < tc_count; tc++) {
+		/* Priority XOFF Transmitted */
+		stats->pxofftxc[tc] += IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(tc));
+		/* Priority XOFF Received */
+		stats->pxoffrxc[tc] += IXGBE_READ_REG(hw, IXGBE_PXOFFRXCNT(tc));
+	}
+
+	return 0;
+}
+
+/**
+ * ixgbe_dcb_config_packet_buffers_82599 - Configure DCB packet buffers
+ * @hw: pointer to hardware structure
+ * @dcb_config: pointer to ixgbe_dcb_config structure
+ *
+ * Configure packet buffers for DCB mode.
+ */
+s32 ixgbe_dcb_config_packet_buffers_82599(struct ixgbe_hw *hw,
+                                          struct ixgbe_dcb_config *dcb_config)
+{
+	s32 ret_val = 0;
+	u32 value = IXGBE_RXPBSIZE_64KB;
+	u8  i = 0;
+
+	/* Setup Rx packet buffer sizes */
+	switch (dcb_config->rx_pba_cfg) {
+	case pba_80_48:
+		/* Setup the first four at 80KB */
+		value = IXGBE_RXPBSIZE_80KB;
+		for (; i < 4; i++)
+			IXGBE_WRITE_REG(hw, IXGBE_RXPBSIZE(i), value);
+		/* Setup the last four at 48KB...don't re-init i */
+		value = IXGBE_RXPBSIZE_48KB;
+		/* Fall Through */
+	case pba_equal:
+	default:
+		for (; i < IXGBE_MAX_PACKET_BUFFERS; i++)
+			IXGBE_WRITE_REG(hw, IXGBE_RXPBSIZE(i), value);
+
+		/* Setup Tx packet buffer sizes */
+		for (i = 0; i < IXGBE_MAX_PACKET_BUFFERS; i++) {
+			IXGBE_WRITE_REG(hw, IXGBE_TXPBSIZE(i),
+			                IXGBE_TXPBSIZE_20KB);
+			IXGBE_WRITE_REG(hw, IXGBE_TXPBTHRESH(i),
+			                IXGBE_TXPBTHRESH_DCB);
+		}
+		break;
+	}
+
+	return ret_val;
+}
+
+/**
+ * ixgbe_dcb_config_rx_arbiter_82599 - Config Rx Data arbiter
+ * @hw: pointer to hardware structure
+ * @dcb_config: pointer to ixgbe_dcb_config structure
+ *
+ * Configure Rx Packet Arbiter and credits for each traffic class.
+ */
+s32 ixgbe_dcb_config_rx_arbiter_82599(struct ixgbe_hw *hw,
+                                      struct ixgbe_dcb_config *dcb_config)
+{
+	struct tc_bw_alloc    *p;
+	u32    reg           = 0;
+	u32    credit_refill = 0;
+	u32    credit_max    = 0;
+	u8     i             = 0;
+
+	/* Disable the arbiter before changing parameters */
+	IXGBE_WRITE_REG(hw, IXGBE_RTRPCS, IXGBE_RTRPCS_ARBDIS);
+
+	/* Map all traffic classes to their UP, 1 to 1 */
+	reg = 0;
+	for (i = 0; i < MAX_TRAFFIC_CLASS; i++)
+		reg |= (i << (i * IXGBE_RTRUP2TC_UP_SHIFT));
+	IXGBE_WRITE_REG(hw, IXGBE_RTRUP2TC, reg);
+
+	/* Configure traffic class credits and priority */
+	for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
+		p = &dcb_config->tc_config[i].path[DCB_RX_CONFIG];
+
+		credit_refill = p->data_credits_refill;
+		credit_max    = p->data_credits_max;
+		reg = credit_refill | (credit_max << IXGBE_RTRPT4C_MCL_SHIFT);
+
+		reg |= (u32)(p->bwg_id) << IXGBE_RTRPT4C_BWG_SHIFT;
+
+		if (p->prio_type == prio_link)
+			reg |= IXGBE_RTRPT4C_LSP;
+
+		IXGBE_WRITE_REG(hw, IXGBE_RTRPT4C(i), reg);
+	}
+
+	/*
+	 * Configure Rx packet plane (recycle mode; WSP) and
+	 * enable arbiter
+	 */
+	reg = IXGBE_RTRPCS_RRM | IXGBE_RTRPCS_RAC;
+	IXGBE_WRITE_REG(hw, IXGBE_RTRPCS, reg);
+
+	return 0;
+}
+
+/**
+ * ixgbe_dcb_config_tx_desc_arbiter_82599 - Config Tx Desc. arbiter
+ * @hw: pointer to hardware structure
+ * @dcb_config: pointer to ixgbe_dcb_config structure
+ *
+ * Configure Tx Descriptor Arbiter and credits for each traffic class.
+ */
+s32 ixgbe_dcb_config_tx_desc_arbiter_82599(struct ixgbe_hw *hw,
+                                           struct ixgbe_dcb_config *dcb_config)
+{
+	struct tc_bw_alloc *p;
+	u32    reg, max_credits;
+	u8     i;
+
+	/* Disable the arbiter before changing parameters */
+	IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, IXGBE_RTTDCS_ARBDIS);
+
+	/* Clear the per-Tx queue credits; we use per-TC instead */
+	for (i = 0; i < 128; i++) {
+		IXGBE_WRITE_REG(hw, IXGBE_RTTDQSEL, i);
+		IXGBE_WRITE_REG(hw, IXGBE_RTTDT1C, 0);
+	}
+
+	/* Configure traffic class credits and priority */
+	for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
+		p = &dcb_config->tc_config[i].path[DCB_TX_CONFIG];
+		max_credits = dcb_config->tc_config[i].desc_credits_max;
+		reg = max_credits << IXGBE_RTTDT2C_MCL_SHIFT;
+		reg |= p->data_credits_refill;
+		reg |= (u32)(p->bwg_id) << IXGBE_RTTDT2C_BWG_SHIFT;
+
+		if (p->prio_type == prio_group)
+			reg |= IXGBE_RTTDT2C_GSP;
+
+		if (p->prio_type == prio_link)
+			reg |= IXGBE_RTTDT2C_LSP;
+
+		IXGBE_WRITE_REG(hw, IXGBE_RTTDT2C(i), reg);
+	}
+
+	/*
+	 * Configure Tx descriptor plane (recycle mode; WSP) and
+	 * enable arbiter
+	 */
+	reg = IXGBE_RTTDCS_TDPAC | IXGBE_RTTDCS_TDRM;
+	IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, reg);
+
+	return 0;
+}
+
+/**
+ * ixgbe_dcb_config_tx_data_arbiter_82599 - Config Tx Data arbiter
+ * @hw: pointer to hardware structure
+ * @dcb_config: pointer to ixgbe_dcb_config structure
+ *
+ * Configure Tx Packet Arbiter and credits for each traffic class.
+ */
+s32 ixgbe_dcb_config_tx_data_arbiter_82599(struct ixgbe_hw *hw,
+                                           struct ixgbe_dcb_config *dcb_config)
+{
+	struct tc_bw_alloc *p;
+	u32 reg;
+	u8 i;
+
+	/* Disable the arbiter before changing parameters */
+	IXGBE_WRITE_REG(hw, IXGBE_RTTPCS, IXGBE_RTTPCS_ARBDIS);
+
+	/* Map all traffic classes to their UP, 1 to 1 */
+	reg = 0;
+	for (i = 0; i < MAX_TRAFFIC_CLASS; i++)
+		reg |= (i << (i * IXGBE_RTTUP2TC_UP_SHIFT));
+	IXGBE_WRITE_REG(hw, IXGBE_RTTUP2TC, reg);
+
+	/* Configure traffic class credits and priority */
+	for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
+		p = &dcb_config->tc_config[i].path[DCB_TX_CONFIG];
+		reg = p->data_credits_refill;
+		reg |= (u32)(p->data_credits_max) << IXGBE_RTTPT2C_MCL_SHIFT;
+		reg |= (u32)(p->bwg_id) << IXGBE_RTTPT2C_BWG_SHIFT;
+
+		if (p->prio_type == prio_group)
+			reg |= IXGBE_RTTPT2C_GSP;
+
+		if (p->prio_type == prio_link)
+			reg |= IXGBE_RTTPT2C_LSP;
+
+		IXGBE_WRITE_REG(hw, IXGBE_RTTPT2C(i), reg);
+	}
+
+	/*
+	 * Configure Tx packet plane (recycle mode; SP; arb delay) and
+	 * enable arbiter
+	 */
+	reg = IXGBE_RTTPCS_TPPAC | IXGBE_RTTPCS_TPRM |
+	      (IXGBE_RTTPCS_ARBD_DCB << IXGBE_RTTPCS_ARBD_SHIFT);
+	IXGBE_WRITE_REG(hw, IXGBE_RTTPCS, reg);
+
+	return 0;
+}
+
+/**
+ * ixgbe_dcb_config_pfc_82599 - Configure priority flow control
+ * @hw: pointer to hardware structure
+ * @dcb_config: pointer to ixgbe_dcb_config structure
+ *
+ * Configure Priority Flow Control (PFC) for each traffic class.
+ */
+s32 ixgbe_dcb_config_pfc_82599(struct ixgbe_hw *hw,
+                               struct ixgbe_dcb_config *dcb_config)
+{
+	u32 i, reg;
+
+	/* If PFC is disabled globally then fall back to LFC. */
+	if (!dcb_config->pfc_mode_enable) {
+		for (i = 0; i < MAX_TRAFFIC_CLASS; i++)
+			hw->mac.ops.setup_fc(hw, i);
+		goto out;
+	}
+
+	/* Configure PFC Tx thresholds per TC */
+	for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
+		/* Config and remember Tx */
+		if (dcb_config->tc_config[i].dcb_pfc == pfc_enabled_full ||
+		    dcb_config->tc_config[i].dcb_pfc == pfc_enabled_tx) {
+			reg = hw->fc.high_water | IXGBE_FCRTH_FCEN;
+			IXGBE_WRITE_REG(hw, IXGBE_FCRTH_82599(i), reg);
+			reg = hw->fc.low_water | IXGBE_FCRTL_XONE;
+			IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(i), reg);
+		} else {
+			IXGBE_WRITE_REG(hw, IXGBE_FCRTH_82599(i), 0);
+			IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(i), 0);
+		}
+	}
+
+	/* Configure pause time (2 TCs per register) */
+	reg = hw->fc.pause_time | (hw->fc.pause_time << 16);
+	for (i = 0; i < (MAX_TRAFFIC_CLASS / 2); i++)
+		IXGBE_WRITE_REG(hw, IXGBE_FCTTV(i), reg);
+
+	/* Configure flow control refresh threshold value */
+	IXGBE_WRITE_REG(hw, IXGBE_FCRTV, hw->fc.pause_time / 2);
+
+	/* Enable Transmit PFC */
+	reg = IXGBE_FCCFG_TFCE_PRIORITY;
+	IXGBE_WRITE_REG(hw, IXGBE_FCCFG, reg);
+
+	/*
+	 * Enable Receive PFC
+	 * We will always honor XOFF frames we receive when
+	 * we are in PFC mode.
+	 */
+	reg = IXGBE_READ_REG(hw, IXGBE_MFLCN);
+	reg &= ~IXGBE_MFLCN_RFCE;
+	reg |= IXGBE_MFLCN_RPFCE;
+	IXGBE_WRITE_REG(hw, IXGBE_MFLCN, reg);
+out:
+	return 0;
+}
+
+/**
+ * ixgbe_dcb_config_tc_stats_82599 - Config traffic class statistics
+ * @hw: pointer to hardware structure
+ *
+ * Configure queue statistics registers, all queues belonging to same traffic
+ * class uses a single set of queue statistics counters.
+ */
+s32 ixgbe_dcb_config_tc_stats_82599(struct ixgbe_hw *hw)
+{
+	u32 reg = 0;
+	u8  i   = 0;
+
+	/*
+	 * Receive Queues stats setting
+	 * 32 RQSMR registers, each configuring 4 queues.
+	 * Set all 16 queues of each TC to the same stat
+	 * with TC 'n' going to stat 'n'.
+	 */
+	for (i = 0; i < 32; i++) {
+		reg = 0x01010101 * (i / 4);
+		IXGBE_WRITE_REG(hw, IXGBE_RQSMR(i), reg);
+	}
+	/*
+	 * Transmit Queues stats setting
+	 * 32 TQSM registers, each controlling 4 queues.
+	 * Set all queues of each TC to the same stat
+	 * with TC 'n' going to stat 'n'.
+	 * Tx queues are allocated non-uniformly to TCs:
+	 * 32, 32, 16, 16, 8, 8, 8, 8.
+	 */
+	for (i = 0; i < 32; i++) {
+		if (i < 8)
+			reg = 0x00000000;
+		else if (i < 16)
+			reg = 0x01010101;
+		else if (i < 20)
+			reg = 0x02020202;
+		else if (i < 24)
+			reg = 0x03030303;
+		else if (i < 26)
+			reg = 0x04040404;
+		else if (i < 28)
+			reg = 0x05050505;
+		else if (i < 30)
+			reg = 0x06060606;
+		else
+			reg = 0x07070707;
+		IXGBE_WRITE_REG(hw, IXGBE_TQSM(i), reg);
+	}
+
+	return 0;
+}
+
+/**
+ * ixgbe_dcb_config_82599 - Configure general DCB parameters
+ * @hw: pointer to hardware structure
+ * @dcb_config: pointer to ixgbe_dcb_config structure
+ *
+ * Configure general DCB parameters.
+ */
+s32 ixgbe_dcb_config_82599(struct ixgbe_hw *hw)
+{
+	u32 reg;
+	u32 q;
+
+	/* Disable the Tx desc arbiter so that MTQC can be changed */
+	reg = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
+	reg |= IXGBE_RTTDCS_ARBDIS;
+	IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, reg);
+
+	/* Enable DCB for Rx with 8 TCs */
+	reg = IXGBE_READ_REG(hw, IXGBE_MRQC);
+	switch (reg & IXGBE_MRQC_MRQE_MASK) {
+	case 0:
+	case IXGBE_MRQC_RT4TCEN:
+		/* RSS disabled cases */
+		reg = (reg & ~IXGBE_MRQC_MRQE_MASK) | IXGBE_MRQC_RT8TCEN;
+		break;
+	case IXGBE_MRQC_RSSEN:
+	case IXGBE_MRQC_RTRSS4TCEN:
+		/* RSS enabled cases */
+		reg = (reg & ~IXGBE_MRQC_MRQE_MASK) | IXGBE_MRQC_RTRSS8TCEN;
+		break;
+	default:
+		/* Unsupported value, assume stale data, overwrite no RSS */
+		reg = (reg & ~IXGBE_MRQC_MRQE_MASK) | IXGBE_MRQC_RT8TCEN;
+	}
+	IXGBE_WRITE_REG(hw, IXGBE_MRQC, reg);
+
+	/* Enable DCB for Tx with 8 TCs */
+	reg = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ;
+	IXGBE_WRITE_REG(hw, IXGBE_MTQC, reg);
+
+	/* Disable drop for all queues */
+	for (q = 0; q < 128; q++)
+		IXGBE_WRITE_REG(hw, IXGBE_QDE, q << IXGBE_QDE_IDX_SHIFT);
+
+	/* Enable the Tx desc arbiter */
+	reg = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
+	reg &= ~IXGBE_RTTDCS_ARBDIS;
+	IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, reg);
+
+	return 0;
+}
+
+/**
+ * ixgbe_dcb_hw_config_82599 - Configure and enable DCB
+ * @hw: pointer to hardware structure
+ * @dcb_config: pointer to ixgbe_dcb_config structure
+ *
+ * Configure dcb settings and enable dcb mode.
+ */
+s32 ixgbe_dcb_hw_config_82599(struct ixgbe_hw *hw,
+                              struct ixgbe_dcb_config *dcb_config)
+{
+	ixgbe_dcb_config_packet_buffers_82599(hw, dcb_config);
+	ixgbe_dcb_config_82599(hw);
+	ixgbe_dcb_config_rx_arbiter_82599(hw, dcb_config);
+	ixgbe_dcb_config_tx_desc_arbiter_82599(hw, dcb_config);
+	ixgbe_dcb_config_tx_data_arbiter_82599(hw, dcb_config);
+	ixgbe_dcb_config_pfc_82599(hw, dcb_config);
+	ixgbe_dcb_config_tc_stats_82599(hw);
+
+	return 0;
+}
+