Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking updates from David Miller:
 "This is a re-do of the net-next pull request for the current merge
  window.  The only difference from the one I made the other day is that
  this has Eliezer's interface renames and the timeout handling changes
  made based upon your feedback, as well as a few bug fixes that have
  trickeled in.

  Highlights:

   1) Low latency device polling, eliminating the cost of interrupt
      handling and context switches.  Allows direct polling of a network
      device from socket operations, such as recvmsg() and poll().

      Currently ixgbe, mlx4, and bnx2x support this feature.

      Full high level description, performance numbers, and design in
      commit 0a4db187a999 ("Merge branch 'll_poll'")

      From Eliezer Tamir.

   2) With the routing cache removed, ip_check_mc_rcu() gets exercised
      more than ever before in the case where we have lots of multicast
      addresses.  Use a hash table instead of a simple linked list, from
      Eric Dumazet.

   3) Add driver for Atheros CQA98xx 802.11ac wireless devices, from
      Bartosz Markowski, Janusz Dziedzic, Kalle Valo, Marek Kwaczynski,
      Marek Puzyniak, Michal Kazior, and Sujith Manoharan.

   4) Support reporting the TUN device persist flag to userspace, from
      Pavel Emelyanov.

   5) Allow controlling network device VF link state using netlink, from
      Rony Efraim.

   6) Support GRE tunneling in openvswitch, from Pravin B Shelar.

   7) Adjust SOCK_MIN_RCVBUF and SOCK_MIN_SNDBUF for modern times, from
      Daniel Borkmann and Eric Dumazet.

   8) Allow controlling of TCP quickack behavior on a per-route basis,
      from Cong Wang.

   9) Several bug fixes and improvements to vxlan from Stephen
      Hemminger, Pravin B Shelar, and Mike Rapoport.  In particular,
      support receiving on multiple UDP ports.

  10) Major cleanups, particular in the area of debugging and cookie
      lifetime handline, to the SCTP protocol code.  From Daniel
      Borkmann.

  11) Allow packets to cross network namespaces when traversing tunnel
      devices.  From Nicolas Dichtel.

  12) Allow monitoring netlink traffic via AF_PACKET sockets, in a
      manner akin to how we monitor real network traffic via ptype_all.
      From Daniel Borkmann.

  13) Several bug fixes and improvements for the new alx device driver,
      from Johannes Berg.

  14) Fix scalability issues in the netem packet scheduler's time queue,
      by using an rbtree.  From Eric Dumazet.

  15) Several bug fixes in TCP loss recovery handling, from Yuchung
      Cheng.

  16) Add support for GSO segmentation of MPLS packets, from Simon
      Horman.

  17) Make network notifiers have a real data type for the opaque
      pointer that's passed into them.  Use this to properly handle
      network device flag changes in arp_netdev_event().  From Jiri
      Pirko and Timo Teräs.

  18) Convert several drivers over to module_pci_driver(), from Peter
      Huewe.

  19) tcp_fixup_rcvbuf() can loop 500 times over loopback, just use a
      O(1) calculation instead.  From Eric Dumazet.

  20) Support setting of explicit tunnel peer addresses in ipv6, just
      like ipv4.  From Nicolas Dichtel.

  21) Protect x86 BPF JIT against spraying attacks, from Eric Dumazet.

  22) Prevent a single high rate flow from overruning an individual cpu
      during RX packet processing via selective flow shedding.  From
      Willem de Bruijn.

  23) Don't use spinlocks in TCP md5 signing fast paths, from Eric
      Dumazet.

  24) Don't just drop GSO packets which are above the TBF scheduler's
      burst limit, chop them up so they are in-bounds instead.  Also
      from Eric Dumazet.

  25) VLAN offloads are missed when configured on top of a bridge, fix
      from Vlad Yasevich.

  26) Support IPV6 in ping sockets.  From Lorenzo Colitti.

  27) Receive flow steering targets should be updated at poll() time
      too, from David Majnemer.

  28) Fix several corner case regressions in PMTU/redirect handling due
      to the routing cache removal, from Timo Teräs.

  29) We have to be mindful of ipv4 mapped ipv6 sockets in
      upd_v6_push_pending_frames().  From Hannes Frederic Sowa.

  30) Fix L2TP sequence number handling bugs, from James Chapman."

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1214 commits)
  drivers/net: caif: fix wrong rtnl_is_locked() usage
  drivers/net: enic: release rtnl_lock on error-path
  vhost-net: fix use-after-free in vhost_net_flush
  net: mv643xx_eth: do not use port number as platform device id
  net: sctp: confirm route during forward progress
  virtio_net: fix race in RX VQ processing
  virtio: support unlocked queue poll
  net/cadence/macb: fix bug/typo in extracting gem_irq_read_clear bit
  Documentation: Fix references to defunct linux-net@vger.kernel.org
  net/fs: change busy poll time accounting
  net: rename low latency sockets functions to busy poll
  bridge: fix some kernel warning in multicast timer
  sfc: Fix memory leak when discarding scattered packets
  sit: fix tunnel update via netlink
  dt:net:stmmac: Add dt specific phy reset callback support.
  dt:net:stmmac: Add support to dwmac version 3.610 and 3.710
  dt:net:stmmac: Allocate platform data only if its NULL.
  net:stmmac: fix memleak in the open method
  ipv6: rt6_check_neigh should successfully verify neigh if no NUD information are available
  net: ipv6: fix wrong ping_v6_sendmsg return value
  ...

1 files changed, 520 insertions, 0 deletions

diff --git a/drivers/net/wireless/cw1200/fwio.c b/drivers/net/wireless/cw1200/fwio.c
new file mode 100644
index 000000000000..acdff0f7f952
--- /dev/null
+++ b/drivers/net/wireless/cw1200/fwio.c
@@ -0,0 +1,520 @@
+/*
+ * Firmware I/O code for mac80211 ST-Ericsson CW1200 drivers
+ *
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
+ *
+ * Based on:
+ * ST-Ericsson UMAC CW1200 driver which is
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Ajitpal Singh <ajitpal.singh@stericsson.com>
+ *
+ * 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.
+ */
+
+#include <linux/init.h>
+#include <linux/vmalloc.h>
+#include <linux/sched.h>
+#include <linux/firmware.h>
+
+#include "cw1200.h"
+#include "fwio.h"
+#include "hwio.h"
+#include "hwbus.h"
+#include "bh.h"
+
+static int cw1200_get_hw_type(u32 config_reg_val, int *major_revision)
+{
+	int hw_type = -1;
+	u32 silicon_type = (config_reg_val >> 24) & 0x7;
+	u32 silicon_vers = (config_reg_val >> 31) & 0x1;
+
+	switch (silicon_type) {
+	case 0x00:
+		*major_revision = 1;
+		hw_type = HIF_9000_SILICON_VERSATILE;
+		break;
+	case 0x01:
+	case 0x02: /* CW1x00 */
+	case 0x04: /* CW1x60 */
+		*major_revision = silicon_type;
+		if (silicon_vers)
+			hw_type = HIF_8601_VERSATILE;
+		else
+			hw_type = HIF_8601_SILICON;
+		break;
+	default:
+		break;
+	}
+
+	return hw_type;
+}
+
+static int cw1200_load_firmware_cw1200(struct cw1200_common *priv)
+{
+	int ret, block, num_blocks;
+	unsigned i;
+	u32 val32;
+	u32 put = 0, get = 0;
+	u8 *buf = NULL;
+	const char *fw_path;
+	const struct firmware *firmware = NULL;
+
+	/* Macroses are local. */
+#define APB_WRITE(reg, val) \
+	do { \
+		ret = cw1200_apb_write_32(priv, CW1200_APB(reg), (val)); \
+		if (ret < 0) \
+			goto error; \
+	} while (0)
+#define APB_READ(reg, val) \
+	do { \
+		ret = cw1200_apb_read_32(priv, CW1200_APB(reg), &(val)); \
+		if (ret < 0) \
+			goto error; \
+	} while (0)
+#define REG_WRITE(reg, val) \
+	do { \
+		ret = cw1200_reg_write_32(priv, (reg), (val)); \
+		if (ret < 0) \
+			goto error; \
+	} while (0)
+#define REG_READ(reg, val) \
+	do { \
+		ret = cw1200_reg_read_32(priv, (reg), &(val)); \
+		if (ret < 0) \
+			goto error; \
+	} while (0)
+
+	switch (priv->hw_revision) {
+	case CW1200_HW_REV_CUT10:
+		fw_path = FIRMWARE_CUT10;
+		if (!priv->sdd_path)
+			priv->sdd_path = SDD_FILE_10;
+		break;
+	case CW1200_HW_REV_CUT11:
+		fw_path = FIRMWARE_CUT11;
+		if (!priv->sdd_path)
+			priv->sdd_path = SDD_FILE_11;
+		break;
+	case CW1200_HW_REV_CUT20:
+		fw_path = FIRMWARE_CUT20;
+		if (!priv->sdd_path)
+			priv->sdd_path = SDD_FILE_20;
+		break;
+	case CW1200_HW_REV_CUT22:
+		fw_path = FIRMWARE_CUT22;
+		if (!priv->sdd_path)
+			priv->sdd_path = SDD_FILE_22;
+		break;
+	case CW1X60_HW_REV:
+		fw_path = FIRMWARE_CW1X60;
+		if (!priv->sdd_path)
+			priv->sdd_path = SDD_FILE_CW1X60;
+		break;
+	default:
+		pr_err("Invalid silicon revision %d.\n", priv->hw_revision);
+		return -EINVAL;
+	}
+
+	/* Initialize common registers */
+	APB_WRITE(DOWNLOAD_IMAGE_SIZE_REG, DOWNLOAD_ARE_YOU_HERE);
+	APB_WRITE(DOWNLOAD_PUT_REG, 0);
+	APB_WRITE(DOWNLOAD_GET_REG, 0);
+	APB_WRITE(DOWNLOAD_STATUS_REG, DOWNLOAD_PENDING);
+	APB_WRITE(DOWNLOAD_FLAGS_REG, 0);
+
+	/* Write the NOP Instruction */
+	REG_WRITE(ST90TDS_SRAM_BASE_ADDR_REG_ID, 0xFFF20000);
+	REG_WRITE(ST90TDS_AHB_DPORT_REG_ID, 0xEAFFFFFE);
+
+	/* Release CPU from RESET */
+	REG_READ(ST90TDS_CONFIG_REG_ID, val32);
+	val32 &= ~ST90TDS_CONFIG_CPU_RESET_BIT;
+	REG_WRITE(ST90TDS_CONFIG_REG_ID, val32);
+
+	/* Enable Clock */
+	val32 &= ~ST90TDS_CONFIG_CPU_CLK_DIS_BIT;
+	REG_WRITE(ST90TDS_CONFIG_REG_ID, val32);
+
+	/* Load a firmware file */
+	ret = request_firmware(&firmware, fw_path, priv->pdev);
+	if (ret) {
+		pr_err("Can't load firmware file %s.\n", fw_path);
+		goto error;
+	}
+
+	buf = kmalloc(DOWNLOAD_BLOCK_SIZE, GFP_KERNEL | GFP_DMA);
+	if (!buf) {
+		pr_err("Can't allocate firmware load buffer.\n");
+		ret = -ENOMEM;
+		goto error;
+	}
+
+	/* Check if the bootloader is ready */
+	for (i = 0; i < 100; i += 1 + i / 2) {
+		APB_READ(DOWNLOAD_IMAGE_SIZE_REG, val32);
+		if (val32 == DOWNLOAD_I_AM_HERE)
+			break;
+		mdelay(i);
+	} /* End of for loop */
+
+	if (val32 != DOWNLOAD_I_AM_HERE) {
+		pr_err("Bootloader is not ready.\n");
+		ret = -ETIMEDOUT;
+		goto error;
+	}
+
+	/* Calculcate number of download blocks */
+	num_blocks = (firmware->size - 1) / DOWNLOAD_BLOCK_SIZE + 1;
+
+	/* Updating the length in Download Ctrl Area */
+	val32 = firmware->size; /* Explicit cast from size_t to u32 */
+	APB_WRITE(DOWNLOAD_IMAGE_SIZE_REG, val32);
+
+	/* Firmware downloading loop */
+	for (block = 0; block < num_blocks; block++) {
+		size_t tx_size;
+		size_t block_size;
+
+		/* check the download status */
+		APB_READ(DOWNLOAD_STATUS_REG, val32);
+		if (val32 != DOWNLOAD_PENDING) {
+			pr_err("Bootloader reported error %d.\n", val32);
+			ret = -EIO;
+			goto error;
+		}
+
+		/* loop until put - get <= 24K */
+		for (i = 0; i < 100; i++) {
+			APB_READ(DOWNLOAD_GET_REG, get);
+			if ((put - get) <=
+			    (DOWNLOAD_FIFO_SIZE - DOWNLOAD_BLOCK_SIZE))
+				break;
+			mdelay(i);
+		}
+
+		if ((put - get) > (DOWNLOAD_FIFO_SIZE - DOWNLOAD_BLOCK_SIZE)) {
+			pr_err("Timeout waiting for FIFO.\n");
+			ret = -ETIMEDOUT;
+			goto error;
+		}
+
+		/* calculate the block size */
+		tx_size = block_size = min((size_t)(firmware->size - put),
+			(size_t)DOWNLOAD_BLOCK_SIZE);
+
+		memcpy(buf, &firmware->data[put], block_size);
+		if (block_size < DOWNLOAD_BLOCK_SIZE) {
+			memset(&buf[block_size], 0,
+			       DOWNLOAD_BLOCK_SIZE - block_size);
+			tx_size = DOWNLOAD_BLOCK_SIZE;
+		}
+
+		/* send the block to sram */
+		ret = cw1200_apb_write(priv,
+			CW1200_APB(DOWNLOAD_FIFO_OFFSET +
+				   (put & (DOWNLOAD_FIFO_SIZE - 1))),
+			buf, tx_size);
+		if (ret < 0) {
+			pr_err("Can't write firmware block @ %d!\n",
+			       put & (DOWNLOAD_FIFO_SIZE - 1));
+			goto error;
+		}
+
+		/* update the put register */
+		put += block_size;
+		APB_WRITE(DOWNLOAD_PUT_REG, put);
+	} /* End of firmware download loop */
+
+	/* Wait for the download completion */
+	for (i = 0; i < 300; i += 1 + i / 2) {
+		APB_READ(DOWNLOAD_STATUS_REG, val32);
+		if (val32 != DOWNLOAD_PENDING)
+			break;
+		mdelay(i);
+	}
+	if (val32 != DOWNLOAD_SUCCESS) {
+		pr_err("Wait for download completion failed: 0x%.8X\n", val32);
+		ret = -ETIMEDOUT;
+		goto error;
+	} else {
+		pr_info("Firmware download completed.\n");
+		ret = 0;
+	}
+
+error:
+	kfree(buf);
+	if (firmware)
+		release_firmware(firmware);
+	return ret;
+
+#undef APB_WRITE
+#undef APB_READ
+#undef REG_WRITE
+#undef REG_READ
+}
+
+
+static int config_reg_read(struct cw1200_common *priv, u32 *val)
+{
+	switch (priv->hw_type) {
+	case HIF_9000_SILICON_VERSATILE: {
+		u16 val16;
+		int ret = cw1200_reg_read_16(priv,
+					     ST90TDS_CONFIG_REG_ID,
+					     &val16);
+		if (ret < 0)
+			return ret;
+		*val = val16;
+		return 0;
+	}
+	case HIF_8601_VERSATILE:
+	case HIF_8601_SILICON:
+	default:
+		cw1200_reg_read_32(priv, ST90TDS_CONFIG_REG_ID, val);
+		break;
+	}
+	return 0;
+}
+
+static int config_reg_write(struct cw1200_common *priv, u32 val)
+{
+	switch (priv->hw_type) {
+	case HIF_9000_SILICON_VERSATILE:
+		return cw1200_reg_write_16(priv,
+					   ST90TDS_CONFIG_REG_ID,
+					   (u16)val);
+	case HIF_8601_VERSATILE:
+	case HIF_8601_SILICON:
+	default:
+		return cw1200_reg_write_32(priv, ST90TDS_CONFIG_REG_ID, val);
+		break;
+	}
+	return 0;
+}
+
+int cw1200_load_firmware(struct cw1200_common *priv)
+{
+	int ret;
+	int i;
+	u32 val32;
+	u16 val16;
+	int major_revision = -1;
+
+	/* Read CONFIG Register */
+	ret = cw1200_reg_read_32(priv, ST90TDS_CONFIG_REG_ID, &val32);
+	if (ret < 0) {
+		pr_err("Can't read config register.\n");
+		goto out;
+	}
+
+	if (val32 == 0 || val32 == 0xffffffff) {
+		pr_err("Bad config register value (0x%08x)\n", val32);
+		ret = -EIO;
+		goto out;
+	}
+
+	priv->hw_type = cw1200_get_hw_type(val32, &major_revision);
+	if (priv->hw_type < 0) {
+		pr_err("Can't deduce hardware type.\n");
+		ret = -ENOTSUPP;
+		goto out;
+	}
+
+	/* Set DPLL Reg value, and read back to confirm writes work */
+	ret = cw1200_reg_write_32(priv, ST90TDS_TSET_GEN_R_W_REG_ID,
+				  cw1200_dpll_from_clk(priv->hw_refclk));
+	if (ret < 0) {
+		pr_err("Can't write DPLL register.\n");
+		goto out;
+	}
+
+	msleep(20);
+
+	ret = cw1200_reg_read_32(priv,
+		ST90TDS_TSET_GEN_R_W_REG_ID, &val32);
+	if (ret < 0) {
+		pr_err("Can't read DPLL register.\n");
+		goto out;
+	}
+
+	if (val32 != cw1200_dpll_from_clk(priv->hw_refclk)) {
+		pr_err("Unable to initialise DPLL register. Wrote 0x%.8X, Read 0x%.8X.\n",
+		       cw1200_dpll_from_clk(priv->hw_refclk), val32);
+		ret = -EIO;
+		goto out;
+	}
+
+	/* Set wakeup bit in device */
+	ret = cw1200_reg_read_16(priv, ST90TDS_CONTROL_REG_ID, &val16);
+	if (ret < 0) {
+		pr_err("set_wakeup: can't read control register.\n");
+		goto out;
+	}
+
+	ret = cw1200_reg_write_16(priv, ST90TDS_CONTROL_REG_ID,
+		val16 | ST90TDS_CONT_WUP_BIT);
+	if (ret < 0) {
+		pr_err("set_wakeup: can't write control register.\n");
+		goto out;
+	}
+
+	/* Wait for wakeup */
+	for (i = 0; i < 300; i += (1 + i / 2)) {
+		ret = cw1200_reg_read_16(priv,
+			ST90TDS_CONTROL_REG_ID, &val16);
+		if (ret < 0) {
+			pr_err("wait_for_wakeup: can't read control register.\n");
+			goto out;
+		}
+
+		if (val16 & ST90TDS_CONT_RDY_BIT)
+			break;
+
+		msleep(i);
+	}
+
+	if ((val16 & ST90TDS_CONT_RDY_BIT) == 0) {
+		pr_err("wait_for_wakeup: device is not responding.\n");
+		ret = -ETIMEDOUT;
+		goto out;
+	}
+
+	switch (major_revision) {
+	case 1:
+		/* CW1200 Hardware detection logic : Check for CUT1.1 */
+		ret = cw1200_ahb_read_32(priv, CW1200_CUT_ID_ADDR, &val32);
+		if (ret) {
+			pr_err("HW detection: can't read CUT ID.\n");
+			goto out;
+		}
+
+		switch (val32) {
+		case CW1200_CUT_11_ID_STR:
+			pr_info("CW1x00 Cut 1.1 silicon detected.\n");
+			priv->hw_revision = CW1200_HW_REV_CUT11;
+			break;
+		default:
+			pr_info("CW1x00 Cut 1.0 silicon detected.\n");
+			priv->hw_revision = CW1200_HW_REV_CUT10;
+			break;
+		}
+
+		/* According to ST-E, CUT<2.0 has busted BA TID0-3.
+		   Just disable it entirely...
+		*/
+		priv->ba_rx_tid_mask = 0;
+		priv->ba_tx_tid_mask = 0;
+		break;
+	case 2: {
+		u32 ar1, ar2, ar3;
+		ret = cw1200_ahb_read_32(priv, CW1200_CUT2_ID_ADDR, &ar1);
+		if (ret) {
+			pr_err("(1) HW detection: can't read CUT ID\n");
+			goto out;
+		}
+		ret = cw1200_ahb_read_32(priv, CW1200_CUT2_ID_ADDR + 4, &ar2);
+		if (ret) {
+			pr_err("(2) HW detection: can't read CUT ID.\n");
+			goto out;
+		}
+
+		ret = cw1200_ahb_read_32(priv, CW1200_CUT2_ID_ADDR + 8, &ar3);
+		if (ret) {
+			pr_err("(3) HW detection: can't read CUT ID.\n");
+			goto out;
+		}
+
+		if (ar1 == CW1200_CUT_22_ID_STR1 &&
+		    ar2 == CW1200_CUT_22_ID_STR2 &&
+		    ar3 == CW1200_CUT_22_ID_STR3) {
+			pr_info("CW1x00 Cut 2.2 silicon detected.\n");
+			priv->hw_revision = CW1200_HW_REV_CUT22;
+		} else {
+			pr_info("CW1x00 Cut 2.0 silicon detected.\n");
+			priv->hw_revision = CW1200_HW_REV_CUT20;
+		}
+		break;
+	}
+	case 4:
+		pr_info("CW1x60 silicon detected.\n");
+		priv->hw_revision = CW1X60_HW_REV;
+		break;
+	default:
+		pr_err("Unsupported silicon major revision %d.\n",
+		       major_revision);
+		ret = -ENOTSUPP;
+		goto out;
+	}
+
+	/* Checking for access mode */
+	ret = config_reg_read(priv, &val32);
+	if (ret < 0) {
+		pr_err("Can't read config register.\n");
+		goto out;
+	}
+
+	if (!(val32 & ST90TDS_CONFIG_ACCESS_MODE_BIT)) {
+		pr_err("Device is already in QUEUE mode!\n");
+			ret = -EINVAL;
+			goto out;
+	}
+
+	switch (priv->hw_type)  {
+	case HIF_8601_SILICON:
+		if (priv->hw_revision == CW1X60_HW_REV) {
+			pr_err("Can't handle CW1160/1260 firmware load yet.\n");
+			ret = -ENOTSUPP;
+			goto out;
+		}
+		ret = cw1200_load_firmware_cw1200(priv);
+		break;
+	default:
+		pr_err("Can't perform firmware load for hw type %d.\n",
+		       priv->hw_type);
+		ret = -ENOTSUPP;
+		goto out;
+	}
+	if (ret < 0) {
+		pr_err("Firmware load error.\n");
+		goto out;
+	}
+
+	/* Enable interrupt signalling */
+	priv->hwbus_ops->lock(priv->hwbus_priv);
+	ret = __cw1200_irq_enable(priv, 1);
+	priv->hwbus_ops->unlock(priv->hwbus_priv);
+	if (ret < 0)
+		goto unsubscribe;
+
+	/* Configure device for MESSSAGE MODE */
+	ret = config_reg_read(priv, &val32);
+	if (ret < 0) {
+		pr_err("Can't read config register.\n");
+		goto unsubscribe;
+	}
+	ret = config_reg_write(priv, val32 & ~ST90TDS_CONFIG_ACCESS_MODE_BIT);
+	if (ret < 0) {
+		pr_err("Can't write config register.\n");
+		goto unsubscribe;
+	}
+
+	/* Unless we read the CONFIG Register we are
+	 * not able to get an interrupt
+	 */
+	mdelay(10);
+	config_reg_read(priv, &val32);
+
+out:
+	return ret;
+
+unsubscribe:
+	/* Disable interrupt signalling */
+	priv->hwbus_ops->lock(priv->hwbus_priv);
+	ret = __cw1200_irq_enable(priv, 0);
+	priv->hwbus_ops->unlock(priv->hwbus_priv);
+	return ret;
+}