Merge tag 'ntb-4.18' of git://github.com/jonmason/ntb

Pull NTB updates from Jon Mason:

 - reorg and clean-up of the Intel NTB driver

 - a trivial comment change

 - change GFP_ATOMIC to GFP_KERNEL where appropriate

* tag 'ntb-4.18' of git://github.com/jonmason/ntb:
  ntb: ntb_transport: Replace GFP_ATOMIC with GFP_KERNEL in ntb_transport_create_queue
  ntb: ntb_transport: Replace GFP_ATOMIC with GFP_KERNEL in ntb_transport_setup_qp_mw
  NTB: ntb_hw_idt: fix typo 'can by' to 'can be'
  ntb: intel: change references of skx to gen3
  ntb: intel: split out the gen3 code
  ntb: intel: header definitions refactor

drivers/ntb/hw/idt/ntb_hw_idt.c

@@ -1401,7 +1401,7 @@ static int idt_ntb_peer_mw_clear_trans(struct ntb_dev *ntb, int pidx,
  *                          5. Doorbell operations
  *
  *    Doorbell functionality of IDT PCIe-switches is pretty unusual. First of
- * all there is global doorbell register which state can by changed by any
+ * all there is global doorbell register which state can be changed by any
  * NT-function of the IDT device in accordance with global permissions. These
  * permissions configs are not supported by NTB API, so it must be done by
  * either BIOS or EEPROM settings. In the same way the state of the global

drivers/ntb/hw/intel/Makefile

 obj-$(CONFIG_NTB_INTEL) += ntb_hw_intel.o
+ntb_hw_intel-y := ntb_hw_gen1.o ntb_hw_gen3.o

drivers/ntb/hw/intel/ntb_hw_gen1.h

+/*
+ * This file is provided under a dual BSD/GPLv2 license.  When using or
+ *   redistributing this file, you may do so under either license.
+ *
+ *   GPL LICENSE SUMMARY
+ *
+ *   Copyright(c) 2012-2017 Intel Corporation. All rights reserved.
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of version 2 of the GNU General Public License as
+ *   published by the Free Software Foundation.
+ *
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2012-2017 Intel Corporation. All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copy
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _NTB_INTEL_GEN1_H_
+#define _NTB_INTEL_GEN1_H_
+
+#include "ntb_hw_intel.h"
+
+/* Intel Gen1 Xeon hardware */
+#define XEON_PBAR23LMT_OFFSET		0x0000
+#define XEON_PBAR45LMT_OFFSET		0x0008
+#define XEON_PBAR4LMT_OFFSET		0x0008
+#define XEON_PBAR5LMT_OFFSET		0x000c
+#define XEON_PBAR23XLAT_OFFSET		0x0010
+#define XEON_PBAR45XLAT_OFFSET		0x0018
+#define XEON_PBAR4XLAT_OFFSET		0x0018
+#define XEON_PBAR5XLAT_OFFSET		0x001c
+#define XEON_SBAR23LMT_OFFSET		0x0020
+#define XEON_SBAR45LMT_OFFSET		0x0028
+#define XEON_SBAR4LMT_OFFSET		0x0028
+#define XEON_SBAR5LMT_OFFSET		0x002c
+#define XEON_SBAR23XLAT_OFFSET		0x0030
+#define XEON_SBAR45XLAT_OFFSET		0x0038
+#define XEON_SBAR4XLAT_OFFSET		0x0038
+#define XEON_SBAR5XLAT_OFFSET		0x003c
+#define XEON_SBAR0BASE_OFFSET		0x0040
+#define XEON_SBAR23BASE_OFFSET		0x0048
+#define XEON_SBAR45BASE_OFFSET		0x0050
+#define XEON_SBAR4BASE_OFFSET		0x0050
+#define XEON_SBAR5BASE_OFFSET		0x0054
+#define XEON_SBDF_OFFSET		0x005c
+#define XEON_NTBCNTL_OFFSET		0x0058
+#define XEON_PDOORBELL_OFFSET		0x0060
+#define XEON_PDBMSK_OFFSET		0x0062
+#define XEON_SDOORBELL_OFFSET		0x0064
+#define XEON_SDBMSK_OFFSET		0x0066
+#define XEON_USMEMMISS_OFFSET		0x0070
+#define XEON_SPAD_OFFSET		0x0080
+#define XEON_PBAR23SZ_OFFSET		0x00d0
+#define XEON_PBAR45SZ_OFFSET		0x00d1
+#define XEON_PBAR4SZ_OFFSET		0x00d1
+#define XEON_SBAR23SZ_OFFSET		0x00d2
+#define XEON_SBAR45SZ_OFFSET		0x00d3
+#define XEON_SBAR4SZ_OFFSET		0x00d3
+#define XEON_PPD_OFFSET			0x00d4
+#define XEON_PBAR5SZ_OFFSET		0x00d5
+#define XEON_SBAR5SZ_OFFSET		0x00d6
+#define XEON_WCCNTRL_OFFSET		0x00e0
+#define XEON_UNCERRSTS_OFFSET		0x014c
+#define XEON_CORERRSTS_OFFSET		0x0158
+#define XEON_LINK_STATUS_OFFSET		0x01a2
+#define XEON_SPCICMD_OFFSET		0x0504
+#define XEON_DEVCTRL_OFFSET		0x0598
+#define XEON_DEVSTS_OFFSET		0x059a
+#define XEON_SLINK_STATUS_OFFSET	0x05a2
+#define XEON_B2B_SPAD_OFFSET		0x0100
+#define XEON_B2B_DOORBELL_OFFSET	0x0140
+#define XEON_B2B_XLAT_OFFSETL		0x0144
+#define XEON_B2B_XLAT_OFFSETU		0x0148
+#define XEON_PPD_CONN_MASK		0x03
+#define XEON_PPD_CONN_TRANSPARENT	0x00
+#define XEON_PPD_CONN_B2B		0x01
+#define XEON_PPD_CONN_RP		0x02
+#define XEON_PPD_DEV_MASK		0x10
+#define XEON_PPD_DEV_USD		0x00
+#define XEON_PPD_DEV_DSD		0x10
+#define XEON_PPD_SPLIT_BAR_MASK		0x40
+
+#define XEON_PPD_TOPO_MASK	(XEON_PPD_CONN_MASK | XEON_PPD_DEV_MASK)
+#define XEON_PPD_TOPO_PRI_USD	(XEON_PPD_CONN_RP | XEON_PPD_DEV_USD)
+#define XEON_PPD_TOPO_PRI_DSD	(XEON_PPD_CONN_RP | XEON_PPD_DEV_DSD)
+#define XEON_PPD_TOPO_SEC_USD	(XEON_PPD_CONN_TRANSPARENT | XEON_PPD_DEV_USD)
+#define XEON_PPD_TOPO_SEC_DSD	(XEON_PPD_CONN_TRANSPARENT | XEON_PPD_DEV_DSD)
+#define XEON_PPD_TOPO_B2B_USD	(XEON_PPD_CONN_B2B | XEON_PPD_DEV_USD)
+#define XEON_PPD_TOPO_B2B_DSD	(XEON_PPD_CONN_B2B | XEON_PPD_DEV_DSD)
+
+#define XEON_MW_COUNT			2
+#define HSX_SPLIT_BAR_MW_COUNT		3
+#define XEON_DB_COUNT			15
+#define XEON_DB_LINK			15
+#define XEON_DB_LINK_BIT			BIT_ULL(XEON_DB_LINK)
+#define XEON_DB_MSIX_VECTOR_COUNT	4
+#define XEON_DB_MSIX_VECTOR_SHIFT	5
+#define XEON_DB_TOTAL_SHIFT		16
+#define XEON_SPAD_COUNT			16
+
+/* Use the following addresses for translation between b2b ntb devices in case
+ * the hardware default values are not reliable. */
+#define XEON_B2B_BAR0_ADDR	0x1000000000000000ull
+#define XEON_B2B_BAR2_ADDR64	0x2000000000000000ull
+#define XEON_B2B_BAR4_ADDR64	0x4000000000000000ull
+#define XEON_B2B_BAR4_ADDR32	0x20000000u
+#define XEON_B2B_BAR5_ADDR32	0x40000000u
+
+/* The peer ntb secondary config space is 32KB fixed size */
+#define XEON_B2B_MIN_SIZE		0x8000
+
+/* flags to indicate hardware errata */
+#define NTB_HWERR_SDOORBELL_LOCKUP	BIT_ULL(0)
+#define NTB_HWERR_SB01BASE_LOCKUP	BIT_ULL(1)
+#define NTB_HWERR_B2BDOORBELL_BIT14	BIT_ULL(2)
+#define NTB_HWERR_MSIX_VECTOR32_BAD	BIT_ULL(3)
+
+extern struct intel_b2b_addr xeon_b2b_usd_addr;
+extern struct intel_b2b_addr xeon_b2b_dsd_addr;
+
+int ndev_init_isr(struct intel_ntb_dev *ndev, int msix_min, int msix_max,
+		int msix_shift, int total_shift);
+enum ntb_topo xeon_ppd_topo(struct intel_ntb_dev *ndev, u8 ppd);
+u64 ndev_db_read(struct intel_ntb_dev *ndev, void __iomem *mmio);
+int ndev_db_write(struct intel_ntb_dev *ndev, u64 db_bits,
+				void __iomem *mmio);
+int ndev_mw_to_bar(struct intel_ntb_dev *ndev, int idx);
+int intel_ntb_mw_count(struct ntb_dev *ntb, int pidx);
+int intel_ntb_mw_get_align(struct ntb_dev *ntb, int pidx, int idx,
+		resource_size_t *addr_align, resource_size_t *size_align,
+		resource_size_t *size_max);
+int intel_ntb_peer_mw_count(struct ntb_dev *ntb);
+int intel_ntb_peer_mw_get_addr(struct ntb_dev *ntb, int idx,
+		phys_addr_t *base, resource_size_t *size);
+u64 intel_ntb_link_is_up(struct ntb_dev *ntb, enum ntb_speed *speed,
+		enum ntb_width *width);
+int intel_ntb_link_disable(struct ntb_dev *ntb);
+u64 intel_ntb_db_valid_mask(struct ntb_dev *ntb);
+int intel_ntb_db_vector_count(struct ntb_dev *ntb);
+u64 intel_ntb_db_vector_mask(struct ntb_dev *ntb, int db_vector);
+int intel_ntb_db_set_mask(struct ntb_dev *ntb, u64 db_bits);
+int intel_ntb_db_clear_mask(struct ntb_dev *ntb, u64 db_bits);
+int intel_ntb_peer_db_addr(struct ntb_dev *ntb, phys_addr_t *db_addr,
+		resource_size_t *db_size);
+int intel_ntb_spad_is_unsafe(struct ntb_dev *ntb);
+int intel_ntb_spad_count(struct ntb_dev *ntb);
+u32 intel_ntb_spad_read(struct ntb_dev *ntb, int idx);
+int intel_ntb_spad_write(struct ntb_dev *ntb, int idx, u32 val);
+u32 intel_ntb_peer_spad_read(struct ntb_dev *ntb, int pidx, int sidx);
+int intel_ntb_peer_spad_write(struct ntb_dev *ntb, int pidx, int sidx,
+		u32 val);
+int intel_ntb_peer_spad_addr(struct ntb_dev *ntb, int pidx, int sidx,
+				    phys_addr_t *spad_addr);
+int xeon_link_is_up(struct intel_ntb_dev *ndev);
+
+#endif

drivers/ntb/hw/intel/ntb_hw_gen3.c

+/*
+ * This file is provided under a dual BSD/GPLv2 license.  When using or
+ *   redistributing this file, you may do so under either license.
+ *
+ *   GPL LICENSE SUMMARY
+ *
+ *   Copyright(c) 2017 Intel Corporation. All rights reserved.
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of version 2 of the GNU General Public License as
+ *   published by the Free Software Foundation.
+ *
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2017 Intel Corporation. All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copy
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Intel PCIe GEN3 NTB Linux driver
+ *
+ */
+
+#include <linux/debugfs.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/random.h>
+#include <linux/slab.h>
+#include <linux/ntb.h>
+
+#include "ntb_hw_intel.h"
+#include "ntb_hw_gen1.h"
+#include "ntb_hw_gen3.h"
+
+static int gen3_poll_link(struct intel_ntb_dev *ndev);
+
+static const struct intel_ntb_reg gen3_reg = {
+	.poll_link		= gen3_poll_link,
+	.link_is_up		= xeon_link_is_up,
+	.db_ioread		= gen3_db_ioread,
+	.db_iowrite		= gen3_db_iowrite,
+	.db_size		= sizeof(u32),
+	.ntb_ctl		= GEN3_NTBCNTL_OFFSET,
+	.mw_bar			= {2, 4},
+};
+
+static const struct intel_ntb_alt_reg gen3_pri_reg = {
+	.db_bell		= GEN3_EM_DOORBELL_OFFSET,
+	.db_clear		= GEN3_IM_INT_STATUS_OFFSET,
+	.db_mask		= GEN3_IM_INT_DISABLE_OFFSET,
+	.spad			= GEN3_IM_SPAD_OFFSET,
+};
+
+static const struct intel_ntb_alt_reg gen3_b2b_reg = {
+	.db_bell		= GEN3_IM_DOORBELL_OFFSET,
+	.db_clear		= GEN3_EM_INT_STATUS_OFFSET,
+	.db_mask		= GEN3_EM_INT_DISABLE_OFFSET,
+	.spad			= GEN3_B2B_SPAD_OFFSET,
+};
+
+static const struct intel_ntb_xlat_reg gen3_sec_xlat = {
+/*	.bar0_base		= GEN3_EMBAR0_OFFSET, */
+	.bar2_limit		= GEN3_IMBAR1XLMT_OFFSET,
+	.bar2_xlat		= GEN3_IMBAR1XBASE_OFFSET,
+};
+
+static int gen3_poll_link(struct intel_ntb_dev *ndev)
+{
+	u16 reg_val;
+	int rc;
+
+	ndev->reg->db_iowrite(ndev->db_link_mask,
+			      ndev->self_mmio +
+			      ndev->self_reg->db_clear);
+
+	rc = pci_read_config_word(ndev->ntb.pdev,
+				  GEN3_LINK_STATUS_OFFSET, &reg_val);
+	if (rc)
+		return 0;
+
+	if (reg_val == ndev->lnk_sta)
+		return 0;
+
+	ndev->lnk_sta = reg_val;
+
+	return 1;
+}
+
+static int gen3_init_isr(struct intel_ntb_dev *ndev)
+{
+	int i;
+
+	/*
+	 * The MSIX vectors and the interrupt status bits are not lined up
+	 * on Skylake. By default the link status bit is bit 32, however it
+	 * is by default MSIX vector0. We need to fixup to line them up.
+	 * The vectors at reset is 1-32,0. We need to reprogram to 0-32.
+	 */
+
+	for (i = 0; i < GEN3_DB_MSIX_VECTOR_COUNT; i++)
+		iowrite8(i, ndev->self_mmio + GEN3_INTVEC_OFFSET + i);
+
+	/* move link status down one as workaround */
+	if (ndev->hwerr_flags & NTB_HWERR_MSIX_VECTOR32_BAD) {
+		iowrite8(GEN3_DB_MSIX_VECTOR_COUNT - 2,
+			 ndev->self_mmio + GEN3_INTVEC_OFFSET +
+			 (GEN3_DB_MSIX_VECTOR_COUNT - 1));
+	}
+
+	return ndev_init_isr(ndev, GEN3_DB_MSIX_VECTOR_COUNT,
+			     GEN3_DB_MSIX_VECTOR_COUNT,
+			     GEN3_DB_MSIX_VECTOR_SHIFT,
+			     GEN3_DB_TOTAL_SHIFT);
+}
+
+static int gen3_setup_b2b_mw(struct intel_ntb_dev *ndev,
+			    const struct intel_b2b_addr *addr,
+			    const struct intel_b2b_addr *peer_addr)
+{
+	struct pci_dev *pdev;
+	void __iomem *mmio;
+	phys_addr_t bar_addr;
+
+	pdev = ndev->ntb.pdev;
+	mmio = ndev->self_mmio;
+
+	/* setup incoming bar limits == base addrs (zero length windows) */
+	bar_addr = addr->bar2_addr64;
+	iowrite64(bar_addr, mmio + GEN3_IMBAR1XLMT_OFFSET);
+	bar_addr = ioread64(mmio + GEN3_IMBAR1XLMT_OFFSET);
+	dev_dbg(&pdev->dev, "IMBAR1XLMT %#018llx\n", bar_addr);
+
+	bar_addr = addr->bar4_addr64;
+	iowrite64(bar_addr, mmio + GEN3_IMBAR2XLMT_OFFSET);
+	bar_addr = ioread64(mmio + GEN3_IMBAR2XLMT_OFFSET);
+	dev_dbg(&pdev->dev, "IMBAR2XLMT %#018llx\n", bar_addr);
+
+	/* zero incoming translation addrs */
+	iowrite64(0, mmio + GEN3_IMBAR1XBASE_OFFSET);
+	iowrite64(0, mmio + GEN3_IMBAR2XBASE_OFFSET);
+
+	ndev->peer_mmio = ndev->self_mmio;
+
+	return 0;
+}
+
+static int gen3_init_ntb(struct intel_ntb_dev *ndev)
+{
+	int rc;
+
+
+	ndev->mw_count = XEON_MW_COUNT;
+	ndev->spad_count = GEN3_SPAD_COUNT;
+	ndev->db_count = GEN3_DB_COUNT;
+	ndev->db_link_mask = GEN3_DB_LINK_BIT;
+
+	/* DB fixup for using 31 right now */
+	if (ndev->hwerr_flags & NTB_HWERR_MSIX_VECTOR32_BAD)
+		ndev->db_link_mask |= BIT_ULL(31);
+
+	switch (ndev->ntb.topo) {
+	case NTB_TOPO_B2B_USD:
+	case NTB_TOPO_B2B_DSD:
+		ndev->self_reg = &gen3_pri_reg;
+		ndev->peer_reg = &gen3_b2b_reg;
+		ndev->xlat_reg = &gen3_sec_xlat;
+
+		if (ndev->ntb.topo == NTB_TOPO_B2B_USD) {
+			rc = gen3_setup_b2b_mw(ndev,
+					      &xeon_b2b_dsd_addr,
+					      &xeon_b2b_usd_addr);
+		} else {
+			rc = gen3_setup_b2b_mw(ndev,
+					      &xeon_b2b_usd_addr,
+					      &xeon_b2b_dsd_addr);
+		}
+
+		if (rc)
+			return rc;
+
+		/* Enable Bus Master and Memory Space on the secondary side */
+		iowrite16(PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER,
+			  ndev->self_mmio + GEN3_SPCICMD_OFFSET);
+
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	ndev->db_valid_mask = BIT_ULL(ndev->db_count) - 1;
+
+	ndev->reg->db_iowrite(ndev->db_valid_mask,
+			      ndev->self_mmio +
+			      ndev->self_reg->db_mask);
+
+	return 0;
+}
+
+int gen3_init_dev(struct intel_ntb_dev *ndev)
+{
+	struct pci_dev *pdev;
+	u8 ppd;
+	int rc;
+
+	pdev = ndev->ntb.pdev;
+
+	ndev->reg = &gen3_reg;
+
+	rc = pci_read_config_byte(pdev, XEON_PPD_OFFSET, &ppd);
+	if (rc)
+		return -EIO;
+
+	ndev->ntb.topo = xeon_ppd_topo(ndev, ppd);
+	dev_dbg(&pdev->dev, "ppd %#x topo %s\n", ppd,
+		ntb_topo_string(ndev->ntb.topo));
+	if (ndev->ntb.topo == NTB_TOPO_NONE)
+		return -EINVAL;
+
+	ndev->hwerr_flags |= NTB_HWERR_MSIX_VECTOR32_BAD;
+
+	rc = gen3_init_ntb(ndev);
+	if (rc)
+		return rc;
+
+	return gen3_init_isr(ndev);
+}
+
+ssize_t ndev_ntb3_debugfs_read(struct file *filp, char __user *ubuf,
+				      size_t count, loff_t *offp)
+{
+	struct intel_ntb_dev *ndev;
+	void __iomem *mmio;
+	char *buf;
+	size_t buf_size;
+	ssize_t ret, off;
+	union { u64 v64; u32 v32; u16 v16; } u;
+
+	ndev = filp->private_data;
+	mmio = ndev->self_mmio;
+
+	buf_size = min(count, 0x800ul);
+
+	buf = kmalloc(buf_size, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	off = 0;
+
+	off += scnprintf(buf + off, buf_size - off,
+			 "NTB Device Information:\n");
+
+	off += scnprintf(buf + off, buf_size - off,
+			 "Connection Topology -\t%s\n",
+			 ntb_topo_string(ndev->ntb.topo));
+
+	off += scnprintf(buf + off, buf_size - off,
+			 "NTB CTL -\t\t%#06x\n", ndev->ntb_ctl);
+	off += scnprintf(buf + off, buf_size - off,
+			 "LNK STA -\t\t%#06x\n", ndev->lnk_sta);
+
+	if (!ndev->reg->link_is_up(ndev))
+		off += scnprintf(buf + off, buf_size - off,
+				 "Link Status -\t\tDown\n");
+	else {
+		off += scnprintf(buf + off, buf_size - off,
+				 "Link Status -\t\tUp\n");
+		off += scnprintf(buf + off, buf_size - off,
+				 "Link Speed -\t\tPCI-E Gen %u\n",
+				 NTB_LNK_STA_SPEED(ndev->lnk_sta));
+		off += scnprintf(buf + off, buf_size - off,
+				 "Link Width -\t\tx%u\n",
+				 NTB_LNK_STA_WIDTH(ndev->lnk_sta));
+	}
+
+	off += scnprintf(buf + off, buf_size - off,
+			 "Memory Window Count -\t%u\n", ndev->mw_count);
+	off += scnprintf(buf + off, buf_size - off,
+			 "Scratchpad Count -\t%u\n", ndev->spad_count);
+	off += scnprintf(buf + off, buf_size - off,
+			 "Doorbell Count -\t%u\n", ndev->db_count);
+	off += scnprintf(buf + off, buf_size - off,
+			 "Doorbell Vector Count -\t%u\n", ndev->db_vec_count);
+	off += scnprintf(buf + off, buf_size - off,
+			 "Doorbell Vector Shift -\t%u\n", ndev->db_vec_shift);
+
+	off += scnprintf(buf + off, buf_size - off,
+			 "Doorbell Valid Mask -\t%#llx\n", ndev->db_valid_mask);
+	off += scnprintf(buf + off, buf_size - off,
+			 "Doorbell Link Mask -\t%#llx\n", ndev->db_link_mask);
+	off += scnprintf(buf + off, buf_size - off,
+			 "Doorbell Mask Cached -\t%#llx\n", ndev->db_mask);
+
+	u.v64 = ndev_db_read(ndev, mmio + ndev->self_reg->db_mask);
+	off += scnprintf(buf + off, buf_size - off,
+			 "Doorbell Mask -\t\t%#llx\n", u.v64);
+
+	u.v64 = ndev_db_read(ndev, mmio + ndev->self_reg->db_bell);
+	off += scnprintf(buf + off, buf_size - off,
+			 "Doorbell Bell -\t\t%#llx\n", u.v64);
+
+	off += scnprintf(buf + off, buf_size - off,
+			 "\nNTB Incoming XLAT:\n");
+
+	u.v64 = ioread64(mmio + GEN3_IMBAR1XBASE_OFFSET);
+	off += scnprintf(buf + off, buf_size - off,
+			 "IMBAR1XBASE -\t\t%#018llx\n", u.v64);
+
+	u.v64 = ioread64(mmio + GEN3_IMBAR2XBASE_OFFSET);
+	off += scnprintf(buf + off, buf_size - off,
+			 "IMBAR2XBASE -\t\t%#018llx\n", u.v64);
+
+	u.v64 = ioread64(mmio + GEN3_IMBAR1XLMT_OFFSET);
+	off += scnprintf(buf + off, buf_size - off,
+			 "IMBAR1XLMT -\t\t\t%#018llx\n", u.v64);
+
+	u.v64 = ioread64(mmio + GEN3_IMBAR2XLMT_OFFSET);
+	off += scnprintf(buf + off, buf_size - off,
+			 "IMBAR2XLMT -\t\t\t%#018llx\n", u.v64);
+
+	if (ntb_topo_is_b2b(ndev->ntb.topo)) {
+		off += scnprintf(buf + off, buf_size - off,
+				 "\nNTB Outgoing B2B XLAT:\n");
+
+		u.v64 = ioread64(mmio + GEN3_EMBAR1XBASE_OFFSET);
+		off += scnprintf(buf + off, buf_size - off,
+				 "EMBAR1XBASE -\t\t%#018llx\n", u.v64);
+
+		u.v64 = ioread64(mmio + GEN3_EMBAR2XBASE_OFFSET);
+		off += scnprintf(buf + off, buf_size - off,
+				 "EMBAR2XBASE -\t\t%#018llx\n", u.v64);
+
+		u.v64 = ioread64(mmio + GEN3_EMBAR1XLMT_OFFSET);
+		off += scnprintf(buf + off, buf_size - off,
+				 "EMBAR1XLMT -\t\t%#018llx\n", u.v64);
+
+		u.v64 = ioread64(mmio + GEN3_EMBAR2XLMT_OFFSET);
+		off += scnprintf(buf + off, buf_size - off,
+				 "EMBAR2XLMT -\t\t%#018llx\n", u.v64);
+
+		off += scnprintf(buf + off, buf_size - off,
+				 "\nNTB Secondary BAR:\n");
+
+		u.v64 = ioread64(mmio + GEN3_EMBAR0_OFFSET);
+		off += scnprintf(buf + off, buf_size - off,
+				 "EMBAR0 -\t\t%#018llx\n", u.v64);
+
+		u.v64 = ioread64(mmio + GEN3_EMBAR1_OFFSET);
+		off += scnprintf(buf + off, buf_size - off,
+				 "EMBAR1 -\t\t%#018llx\n", u.v64);
+
+		u.v64 = ioread64(mmio + GEN3_EMBAR2_OFFSET);
+		off += scnprintf(buf + off, buf_size - off,
+				 "EMBAR2 -\t\t%#018llx\n", u.v64);
+	}
+
+	off += scnprintf(buf + off, buf_size - off,
+			 "\nNTB Statistics:\n");
+
+	u.v16 = ioread16(mmio + GEN3_USMEMMISS_OFFSET);
+	off += scnprintf(buf + off, buf_size - off,
+			 "Upstream Memory Miss -\t%u\n", u.v16);
+
+	off += scnprintf(buf + off, buf_size - off,
+			 "\nNTB Hardware Errors:\n");
+
+	if (!pci_read_config_word(ndev->ntb.pdev,
+				  GEN3_DEVSTS_OFFSET, &u.v16))
+		off += scnprintf(buf + off, buf_size - off,
+				 "DEVSTS -\t\t%#06x\n", u.v16);
+
+	if (!pci_read_config_word(ndev->ntb.pdev,
+				  GEN3_LINK_STATUS_OFFSET, &u.v16))
+		off += scnprintf(buf + off, buf_size - off,
+				 "LNKSTS -\t\t%#06x\n", u.v16);
+
+	if (!pci_read_config_dword(ndev->ntb.pdev,
+				   GEN3_UNCERRSTS_OFFSET, &u.v32))
+		off += scnprintf(buf + off, buf_size - off,
+				 "UNCERRSTS -\t\t%#06x\n", u.v32);
+
+	if (!pci_read_config_dword(ndev->ntb.pdev,
+				   GEN3_CORERRSTS_OFFSET, &u.v32))
+		off += scnprintf(buf + off, buf_size - off,
+				 "CORERRSTS -\t\t%#06x\n", u.v32);
+
+	ret = simple_read_from_buffer(ubuf, count, offp, buf, off);
+	kfree(buf);
+	return ret;
+}
+
+static int intel_ntb3_link_enable(struct ntb_dev *ntb,
+				  enum ntb_speed max_speed,
+				  enum ntb_width max_width)
+{
+	struct intel_ntb_dev *ndev;
+	u32 ntb_ctl;
+
+	ndev = container_of(ntb, struct intel_ntb_dev, ntb);
+
+	dev_dbg(&ntb->pdev->dev,
+		"Enabling link with max_speed %d max_width %d\n",
+		max_speed, max_width);
+
+	if (max_speed != NTB_SPEED_AUTO)
+		dev_dbg(&ntb->pdev->dev, "ignoring max_speed %d\n", max_speed);
+	if (max_width != NTB_WIDTH_AUTO)
+		dev_dbg(&ntb->pdev->dev, "ignoring max_width %d\n", max_width);
+
+	ntb_ctl = ioread32(ndev->self_mmio + ndev->reg->ntb_ctl);
+	ntb_ctl &= ~(NTB_CTL_DISABLE | NTB_CTL_CFG_LOCK);
+	ntb_ctl |= NTB_CTL_P2S_BAR2_SNOOP | NTB_CTL_S2P_BAR2_SNOOP;
+	ntb_ctl |= NTB_CTL_P2S_BAR4_SNOOP | NTB_CTL_S2P_BAR4_SNOOP;
+	iowrite32(ntb_ctl, ndev->self_mmio + ndev->reg->ntb_ctl);
+
+	return 0;
+}
+static int intel_ntb3_mw_set_trans(struct ntb_dev *ntb, int pidx, int idx,
+				   dma_addr_t addr, resource_size_t size)
+{
+	struct intel_ntb_dev *ndev = ntb_ndev(ntb);
+	unsigned long xlat_reg, limit_reg;
+	resource_size_t bar_size, mw_size;
+	void __iomem *mmio;
+	u64 base, limit, reg_val;
+	int bar;
+
+	if (pidx != NTB_DEF_PEER_IDX)
+		return -EINVAL;
+
+	if (idx >= ndev->b2b_idx && !ndev->b2b_off)
+		idx += 1;
+
+	bar = ndev_mw_to_bar(ndev, idx);
+	if (bar < 0)
+		return bar;
+
+	bar_size = pci_resource_len(ndev->ntb.pdev, bar);
+
+	if (idx == ndev->b2b_idx)
+		mw_size = bar_size - ndev->b2b_off;
+	else
+		mw_size = bar_size;
+
+	/* hardware requires that addr is aligned to bar size */
+	if (addr & (bar_size - 1))
+		return -EINVAL;
+
+	/* make sure the range fits in the usable mw size */
+	if (size > mw_size)
+		return -EINVAL;
+
+	mmio = ndev->self_mmio;
+	xlat_reg = ndev->xlat_reg->bar2_xlat + (idx * 0x10);
+	limit_reg = ndev->xlat_reg->bar2_limit + (idx * 0x10);
+	base = pci_resource_start(ndev->ntb.pdev, bar);
+
+	/* Set the limit if supported, if size is not mw_size */
+	if (limit_reg && size != mw_size)
+		limit = base + size;
+	else
+		limit = base + mw_size;
+
+	/* set and verify setting the translation address */
+	iowrite64(addr, mmio + xlat_reg);
+	reg_val = ioread64(mmio + xlat_reg);
+	if (reg_val != addr) {
+		iowrite64(0, mmio + xlat_reg);
+		return -EIO;
+	}
+
+	dev_dbg(&ntb->pdev->dev, "BAR %d IMBARXBASE: %#Lx\n", bar, reg_val);
+
+	/* set and verify setting the limit */
+	iowrite64(limit, mmio + limit_reg);
+	reg_val = ioread64(mmio + limit_reg);
+	if (reg_val != limit) {
+		iowrite64(base, mmio + limit_reg);
+		iowrite64(0, mmio + xlat_reg);
+		return -EIO;
+	}
+
+	dev_dbg(&ntb->pdev->dev, "BAR %d IMBARXLMT: %#Lx\n", bar, reg_val);
+
+	/* setup the EP */
+	limit_reg = ndev->xlat_reg->bar2_limit + (idx * 0x10) + 0x4000;
+	base = ioread64(mmio + GEN3_EMBAR1_OFFSET + (8 * idx));
+	base &= ~0xf;
+
+	if (limit_reg && size != mw_size)
+		limit = base + size;
+	else
+		limit = base + mw_size;
+
+	/* set and verify setting the limit */
+	iowrite64(limit, mmio + limit_reg);
+	reg_val = ioread64(mmio + limit_reg);
+	if (reg_val != limit) {
+		iowrite64(base, mmio + limit_reg);
+		iowrite64(0, mmio + xlat_reg);
+		return -EIO;
+	}
+
+	dev_dbg(&ntb->pdev->dev, "BAR %d EMBARXLMT: %#Lx\n", bar, reg_val);
+
+	return 0;
+}
+
+static int intel_ntb3_peer_db_set(struct ntb_dev *ntb, u64 db_bits)
+{
+	struct intel_ntb_dev *ndev = ntb_ndev(ntb);
+	int bit;
+
+	if (db_bits & ~ndev->db_valid_mask)
+		return -EINVAL;
+
+	while (db_bits) {
+		bit = __ffs(db_bits);
+		iowrite32(1, ndev->peer_mmio +
+				ndev->peer_reg->db_bell + (bit * 4));
+		db_bits &= db_bits - 1;
+	}
+
+	return 0;
+}
+
+static u64 intel_ntb3_db_read(struct ntb_dev *ntb)
+{
+	struct intel_ntb_dev *ndev = ntb_ndev(ntb);
+
+	return ndev_db_read(ndev,
+			    ndev->self_mmio +
+			    ndev->self_reg->db_clear);
+}
+
+static int intel_ntb3_db_clear(struct ntb_dev *ntb, u64 db_bits)
+{
+	struct intel_ntb_dev *ndev = ntb_ndev(ntb);
+
+	return ndev_db_write(ndev, db_bits,
+			     ndev->self_mmio +
+			     ndev->self_reg->db_clear);
+}
+
+const struct ntb_dev_ops intel_ntb3_ops = {
+	.mw_count		= intel_ntb_mw_count,
+	.mw_get_align		= intel_ntb_mw_get_align,
+	.mw_set_trans		= intel_ntb3_mw_set_trans,
+	.peer_mw_count		= intel_ntb_peer_mw_count,
+	.peer_mw_get_addr	= intel_ntb_peer_mw_get_addr,
+	.link_is_up		= intel_ntb_link_is_up,
+	.link_enable		= intel_ntb3_link_enable,
+	.link_disable		= intel_ntb_link_disable,
+	.db_valid_mask		= intel_ntb_db_valid_mask,
+	.db_vector_count	= intel_ntb_db_vector_count,
+	.db_vector_mask		= intel_ntb_db_vector_mask,
+	.db_read		= intel_ntb3_db_read,
+	.db_clear		= intel_ntb3_db_clear,
+	.db_set_mask		= intel_ntb_db_set_mask,
+	.db_clear_mask		= intel_ntb_db_clear_mask,
+	.peer_db_addr		= intel_ntb_peer_db_addr,
+	.peer_db_set		= intel_ntb3_peer_db_set,
+	.spad_is_unsafe		= intel_ntb_spad_is_unsafe,
+	.spad_count		= intel_ntb_spad_count,
+	.spad_read		= intel_ntb_spad_read,
+	.spad_write		= intel_ntb_spad_write,
+	.peer_spad_addr		= intel_ntb_peer_spad_addr,
+	.peer_spad_read		= intel_ntb_peer_spad_read,
+	.peer_spad_write	= intel_ntb_peer_spad_write,
+};
+

drivers/ntb/hw/intel/ntb_hw_gen3.h

+/*
+ * This file is provided under a dual BSD/GPLv2 license.  When using or
+ *   redistributing this file, you may do so under either license.
+ *
+ *   GPL LICENSE SUMMARY
+ *
+ *   Copyright(c) 2012-2017 Intel Corporation. All rights reserved.
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of version 2 of the GNU General Public License as
+ *   published by the Free Software Foundation.
+ *
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2012-2017 Intel Corporation. All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copy
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _NTB_INTEL_GEN3_H_
+#define _NTB_INTEL_GEN3_H_
+
+#include "ntb_hw_intel.h"
+
+/* Intel Skylake Xeon hardware */
+#define GEN3_IMBAR1SZ_OFFSET		0x00d0
+#define GEN3_IMBAR2SZ_OFFSET		0x00d1
+#define GEN3_EMBAR1SZ_OFFSET		0x00d2
+#define GEN3_EMBAR2SZ_OFFSET		0x00d3
+#define GEN3_DEVCTRL_OFFSET		0x0098
+#define GEN3_DEVSTS_OFFSET		0x009a
+#define GEN3_UNCERRSTS_OFFSET		0x014c
+#define GEN3_CORERRSTS_OFFSET		0x0158
+#define GEN3_LINK_STATUS_OFFSET		0x01a2
+
+#define GEN3_NTBCNTL_OFFSET		0x0000
+#define GEN3_IMBAR1XBASE_OFFSET		0x0010		/* SBAR2XLAT */
+#define GEN3_IMBAR1XLMT_OFFSET		0x0018		/* SBAR2LMT */
+#define GEN3_IMBAR2XBASE_OFFSET		0x0020		/* SBAR4XLAT */
+#define GEN3_IMBAR2XLMT_OFFSET		0x0028		/* SBAR4LMT */
+#define GEN3_IM_INT_STATUS_OFFSET	0x0040
+#define GEN3_IM_INT_DISABLE_OFFSET	0x0048
+#define GEN3_IM_SPAD_OFFSET		0x0080		/* SPAD */
+#define GEN3_USMEMMISS_OFFSET		0x0070
+#define GEN3_INTVEC_OFFSET		0x00d0
+#define GEN3_IM_DOORBELL_OFFSET		0x0100		/* SDOORBELL0 */
+#define GEN3_B2B_SPAD_OFFSET		0x0180		/* B2B SPAD */
+#define GEN3_EMBAR0XBASE_OFFSET		0x4008		/* B2B_XLAT */
+#define GEN3_EMBAR1XBASE_OFFSET		0x4010		/* PBAR2XLAT */
+#define GEN3_EMBAR1XLMT_OFFSET		0x4018		/* PBAR2LMT */
+#define GEN3_EMBAR2XBASE_OFFSET		0x4020		/* PBAR4XLAT */
+#define GEN3_EMBAR2XLMT_OFFSET		0x4028		/* PBAR4LMT */
+#define GEN3_EM_INT_STATUS_OFFSET	0x4040
+#define GEN3_EM_INT_DISABLE_OFFSET	0x4048
+#define GEN3_EM_SPAD_OFFSET		0x4080		/* remote SPAD */
+#define GEN3_EM_DOORBELL_OFFSET		0x4100		/* PDOORBELL0 */
+#define GEN3_SPCICMD_OFFSET		0x4504		/* SPCICMD */
+#define GEN3_EMBAR0_OFFSET		0x4510		/* SBAR0BASE */
+#define GEN3_EMBAR1_OFFSET		0x4518		/* SBAR23BASE */
+#define GEN3_EMBAR2_OFFSET		0x4520		/* SBAR45BASE */
+
+#define GEN3_DB_COUNT			32
+#define GEN3_DB_LINK			32
+#define GEN3_DB_LINK_BIT		BIT_ULL(GEN3_DB_LINK)
+#define GEN3_DB_MSIX_VECTOR_COUNT	33
+#define GEN3_DB_MSIX_VECTOR_SHIFT	1
+#define GEN3_DB_TOTAL_SHIFT		33
+#define GEN3_SPAD_COUNT			16
+
+static inline u64 gen3_db_ioread(void __iomem *mmio)
+{
+	return ioread64(mmio);
+}
+
+static inline void gen3_db_iowrite(u64 bits, void __iomem *mmio)
+{
+	iowrite64(bits, mmio);
+}
+
+ssize_t ndev_ntb3_debugfs_read(struct file *filp, char __user *ubuf,
+				      size_t count, loff_t *offp);
+int gen3_init_dev(struct intel_ntb_dev *ndev);
+
+extern const struct ntb_dev_ops intel_ntb3_ops;
+
+#endif

drivers/ntb/hw/intel/ntb_hw_intel.h

@@ -54,6 +54,7 @@
 #include <linux/ntb.h>
 #include <linux/pci.h>
 
+/* PCI device IDs */
 #define PCI_DEVICE_ID_INTEL_NTB_B2B_JSF	0x3725
 #define PCI_DEVICE_ID_INTEL_NTB_PS_JSF	0x3726
 #define PCI_DEVICE_ID_INTEL_NTB_SS_JSF	0x3727
@@ -71,132 +72,7 @@
 #define PCI_DEVICE_ID_INTEL_NTB_SS_BDX	0x6F0F
 #define PCI_DEVICE_ID_INTEL_NTB_B2B_SKX	0x201C
 
-/* Intel Xeon hardware */
-
-#define XEON_PBAR23LMT_OFFSET		0x0000
-#define XEON_PBAR45LMT_OFFSET		0x0008
-#define XEON_PBAR4LMT_OFFSET		0x0008
-#define XEON_PBAR5LMT_OFFSET		0x000c
-#define XEON_PBAR23XLAT_OFFSET		0x0010
-#define XEON_PBAR45XLAT_OFFSET		0x0018
-#define XEON_PBAR4XLAT_OFFSET		0x0018
-#define XEON_PBAR5XLAT_OFFSET		0x001c
-#define XEON_SBAR23LMT_OFFSET		0x0020
-#define XEON_SBAR45LMT_OFFSET		0x0028
-#define XEON_SBAR4LMT_OFFSET		0x0028
-#define XEON_SBAR5LMT_OFFSET		0x002c
-#define XEON_SBAR23XLAT_OFFSET		0x0030
-#define XEON_SBAR45XLAT_OFFSET		0x0038
-#define XEON_SBAR4XLAT_OFFSET		0x0038
-#define XEON_SBAR5XLAT_OFFSET		0x003c
-#define XEON_SBAR0BASE_OFFSET		0x0040
-#define XEON_SBAR23BASE_OFFSET		0x0048
-#define XEON_SBAR45BASE_OFFSET		0x0050
-#define XEON_SBAR4BASE_OFFSET		0x0050
-#define XEON_SBAR5BASE_OFFSET		0x0054
-#define XEON_SBDF_OFFSET		0x005c
-#define XEON_NTBCNTL_OFFSET		0x0058
-#define XEON_PDOORBELL_OFFSET		0x0060
-#define XEON_PDBMSK_OFFSET		0x0062
-#define XEON_SDOORBELL_OFFSET		0x0064
-#define XEON_SDBMSK_OFFSET		0x0066
-#define XEON_USMEMMISS_OFFSET		0x0070
-#define XEON_SPAD_OFFSET		0x0080
-#define XEON_PBAR23SZ_OFFSET		0x00d0
-#define XEON_PBAR45SZ_OFFSET		0x00d1
-#define XEON_PBAR4SZ_OFFSET		0x00d1
-#define XEON_SBAR23SZ_OFFSET		0x00d2
-#define XEON_SBAR45SZ_OFFSET		0x00d3
-#define XEON_SBAR4SZ_OFFSET		0x00d3
-#define XEON_PPD_OFFSET			0x00d4
-#define XEON_PBAR5SZ_OFFSET		0x00d5
-#define XEON_SBAR5SZ_OFFSET		0x00d6
-#define XEON_WCCNTRL_OFFSET		0x00e0
-#define XEON_UNCERRSTS_OFFSET		0x014c
-#define XEON_CORERRSTS_OFFSET		0x0158
-#define XEON_LINK_STATUS_OFFSET		0x01a2
-#define XEON_SPCICMD_OFFSET		0x0504
-#define XEON_DEVCTRL_OFFSET		0x0598
-#define XEON_DEVSTS_OFFSET		0x059a
-#define XEON_SLINK_STATUS_OFFSET	0x05a2
-#define XEON_B2B_SPAD_OFFSET		0x0100
-#define XEON_B2B_DOORBELL_OFFSET	0x0140
-#define XEON_B2B_XLAT_OFFSETL		0x0144
-#define XEON_B2B_XLAT_OFFSETU		0x0148
-#define XEON_PPD_CONN_MASK		0x03
-#define XEON_PPD_CONN_TRANSPARENT	0x00
-#define XEON_PPD_CONN_B2B		0x01
-#define XEON_PPD_CONN_RP		0x02
-#define XEON_PPD_DEV_MASK		0x10
-#define XEON_PPD_DEV_USD		0x00
-#define XEON_PPD_DEV_DSD		0x10
-#define XEON_PPD_SPLIT_BAR_MASK		0x40
-
-#define XEON_PPD_TOPO_MASK	(XEON_PPD_CONN_MASK | XEON_PPD_DEV_MASK)
-#define XEON_PPD_TOPO_PRI_USD	(XEON_PPD_CONN_RP | XEON_PPD_DEV_USD)
-#define XEON_PPD_TOPO_PRI_DSD	(XEON_PPD_CONN_RP | XEON_PPD_DEV_DSD)
-#define XEON_PPD_TOPO_SEC_USD	(XEON_PPD_CONN_TRANSPARENT | XEON_PPD_DEV_USD)
-#define XEON_PPD_TOPO_SEC_DSD	(XEON_PPD_CONN_TRANSPARENT | XEON_PPD_DEV_DSD)
-#define XEON_PPD_TOPO_B2B_USD	(XEON_PPD_CONN_B2B | XEON_PPD_DEV_USD)
-#define XEON_PPD_TOPO_B2B_DSD	(XEON_PPD_CONN_B2B | XEON_PPD_DEV_DSD)
-
-#define XEON_MW_COUNT			2
-#define HSX_SPLIT_BAR_MW_COUNT		3
-#define XEON_DB_COUNT			15
-#define XEON_DB_LINK			15
-#define XEON_DB_LINK_BIT			BIT_ULL(XEON_DB_LINK)
-#define XEON_DB_MSIX_VECTOR_COUNT	4
-#define XEON_DB_MSIX_VECTOR_SHIFT	5
-#define XEON_DB_TOTAL_SHIFT		16
-#define XEON_SPAD_COUNT			16
-
-/* Intel Skylake Xeon hardware */
-#define SKX_IMBAR1SZ_OFFSET		0x00d0
-#define SKX_IMBAR2SZ_OFFSET		0x00d1
-#define SKX_EMBAR1SZ_OFFSET		0x00d2
-#define SKX_EMBAR2SZ_OFFSET		0x00d3
-#define SKX_DEVCTRL_OFFSET		0x0098
-#define SKX_DEVSTS_OFFSET		0x009a
-#define SKX_UNCERRSTS_OFFSET		0x014c
-#define SKX_CORERRSTS_OFFSET		0x0158
-#define SKX_LINK_STATUS_OFFSET		0x01a2
-
-#define SKX_NTBCNTL_OFFSET		0x0000
-#define SKX_IMBAR1XBASE_OFFSET		0x0010		/* SBAR2XLAT */
-#define SKX_IMBAR1XLMT_OFFSET		0x0018		/* SBAR2LMT */
-#define SKX_IMBAR2XBASE_OFFSET		0x0020		/* SBAR4XLAT */
-#define SKX_IMBAR2XLMT_OFFSET		0x0028		/* SBAR4LMT */
-#define SKX_IM_INT_STATUS_OFFSET	0x0040
-#define SKX_IM_INT_DISABLE_OFFSET	0x0048
-#define SKX_IM_SPAD_OFFSET		0x0080		/* SPAD */
-#define SKX_USMEMMISS_OFFSET		0x0070
-#define SKX_INTVEC_OFFSET		0x00d0
-#define SKX_IM_DOORBELL_OFFSET		0x0100		/* SDOORBELL0 */
-#define SKX_B2B_SPAD_OFFSET		0x0180		/* B2B SPAD */
-#define SKX_EMBAR0XBASE_OFFSET		0x4008		/* B2B_XLAT */
-#define SKX_EMBAR1XBASE_OFFSET		0x4010		/* PBAR2XLAT */
-#define SKX_EMBAR1XLMT_OFFSET		0x4018		/* PBAR2LMT */
-#define SKX_EMBAR2XBASE_OFFSET		0x4020		/* PBAR4XLAT */
-#define SKX_EMBAR2XLMT_OFFSET		0x4028		/* PBAR4LMT */
-#define SKX_EM_INT_STATUS_OFFSET	0x4040
-#define SKX_EM_INT_DISABLE_OFFSET	0x4048
-#define SKX_EM_SPAD_OFFSET		0x4080		/* remote SPAD */
-#define SKX_EM_DOORBELL_OFFSET		0x4100		/* PDOORBELL0 */
-#define SKX_SPCICMD_OFFSET		0x4504		/* SPCICMD */
-#define SKX_EMBAR0_OFFSET		0x4510		/* SBAR0BASE */
-#define SKX_EMBAR1_OFFSET		0x4518		/* SBAR23BASE */
-#define SKX_EMBAR2_OFFSET		0x4520		/* SBAR45BASE */
-
-#define SKX_DB_COUNT			32
-#define SKX_DB_LINK			32
-#define SKX_DB_LINK_BIT			BIT_ULL(SKX_DB_LINK)
-#define SKX_DB_MSIX_VECTOR_COUNT	33
-#define SKX_DB_MSIX_VECTOR_SHIFT	1
-#define SKX_DB_TOTAL_SHIFT		33
-#define SKX_SPAD_COUNT			16
-
 /* Ntb control and link status */
-
 #define NTB_CTL_CFG_LOCK		BIT(0)
 #define NTB_CTL_DISABLE			BIT(1)
 #define NTB_CTL_S2P_BAR2_SNOOP		BIT(2)
@@ -213,23 +89,6 @@
 #define NTB_LNK_STA_SPEED(x)		((x) & NTB_LNK_STA_SPEED_MASK)
 #define NTB_LNK_STA_WIDTH(x)		(((x) & NTB_LNK_STA_WIDTH_MASK) >> 4)
 
-/* Use the following addresses for translation between b2b ntb devices in case
- * the hardware default values are not reliable. */
-#define XEON_B2B_BAR0_ADDR	0x1000000000000000ull
-#define XEON_B2B_BAR2_ADDR64	0x2000000000000000ull
-#define XEON_B2B_BAR4_ADDR64	0x4000000000000000ull
-#define XEON_B2B_BAR4_ADDR32	0x20000000u
-#define XEON_B2B_BAR5_ADDR32	0x40000000u
-
-/* The peer ntb secondary config space is 32KB fixed size */
-#define XEON_B2B_MIN_SIZE		0x8000
-
-/* flags to indicate hardware errata */
-#define NTB_HWERR_SDOORBELL_LOCKUP	BIT_ULL(0)
-#define NTB_HWERR_SB01BASE_LOCKUP	BIT_ULL(1)
-#define NTB_HWERR_B2BDOORBELL_BIT14	BIT_ULL(2)
-#define NTB_HWERR_MSIX_VECTOR32_BAD	BIT_ULL(3)
-
 /* flags to indicate unsafe api */
 #define NTB_UNSAFE_DB			BIT_ULL(0)
 #define NTB_UNSAFE_SPAD			BIT_ULL(1)
@@ -328,4 +187,64 @@ struct intel_ntb_dev {
 #define hb_ndev(__work) container_of(__work, struct intel_ntb_dev, \
 				     hb_timer.work)
 
+static inline int pdev_is_gen1(struct pci_dev *pdev)
+{
+	switch (pdev->device) {
+	case PCI_DEVICE_ID_INTEL_NTB_SS_JSF:
+	case PCI_DEVICE_ID_INTEL_NTB_SS_SNB:
+	case PCI_DEVICE_ID_INTEL_NTB_SS_IVT:
+	case PCI_DEVICE_ID_INTEL_NTB_SS_HSX:
+	case PCI_DEVICE_ID_INTEL_NTB_SS_BDX:
+	case PCI_DEVICE_ID_INTEL_NTB_PS_JSF:
+	case PCI_DEVICE_ID_INTEL_NTB_PS_SNB:
+	case PCI_DEVICE_ID_INTEL_NTB_PS_IVT:
+	case PCI_DEVICE_ID_INTEL_NTB_PS_HSX:
+	case PCI_DEVICE_ID_INTEL_NTB_PS_BDX:
+	case PCI_DEVICE_ID_INTEL_NTB_B2B_JSF:
+	case PCI_DEVICE_ID_INTEL_NTB_B2B_SNB:
+	case PCI_DEVICE_ID_INTEL_NTB_B2B_IVT:
+	case PCI_DEVICE_ID_INTEL_NTB_B2B_HSX:
+	case PCI_DEVICE_ID_INTEL_NTB_B2B_BDX:
+		return 1;
+	}
+	return 0;
+}
+
+static inline int pdev_is_gen3(struct pci_dev *pdev)
+{
+	if (pdev->device == PCI_DEVICE_ID_INTEL_NTB_B2B_SKX)
+		return 1;
+
+	return 0;
+}
+
+#ifndef ioread64
+#ifdef readq
+#define ioread64 readq
+#else
+#define ioread64 _ioread64
+static inline u64 _ioread64(void __iomem *mmio)
+{
+	u64 low, high;
+
+	low = ioread32(mmio);
+	high = ioread32(mmio + sizeof(u32));
+	return low | (high << 32);
+}
+#endif
+#endif
+
+#ifndef iowrite64
+#ifdef writeq
+#define iowrite64 writeq
+#else
+#define iowrite64 _iowrite64
+static inline void _iowrite64(u64 val, void __iomem *mmio)
+{
+	iowrite32(val, mmio);
+	iowrite32(val >> 32, mmio + sizeof(u32));
+}
+#endif
+#endif
+
 #endif

drivers/ntb/ntb_transport.c

@@ -637,7 +637,7 @@ static int ntb_transport_setup_qp_mw(struct ntb_transport_ctx *nt,
 	 */
 	node = dev_to_node(&ndev->dev);
 	for (i = qp->rx_alloc_entry; i < qp->rx_max_entry; i++) {
-		entry = kzalloc_node(sizeof(*entry), GFP_ATOMIC, node);
+		entry = kzalloc_node(sizeof(*entry), GFP_KERNEL, node);
 		if (!entry)
 			return -ENOMEM;
 
@@ -1828,7 +1828,7 @@ ntb_transport_create_queue(void *data, struct device *client_dev,
 		qp->rx_dma_chan ? "DMA" : "CPU");
 
 	for (i = 0; i < NTB_QP_DEF_NUM_ENTRIES; i++) {
-		entry = kzalloc_node(sizeof(*entry), GFP_ATOMIC, node);
+		entry = kzalloc_node(sizeof(*entry), GFP_KERNEL, node);
 		if (!entry)
 			goto err1;
 
@@ -1839,7 +1839,7 @@ ntb_transport_create_queue(void *data, struct device *client_dev,
 	qp->rx_alloc_entry = NTB_QP_DEF_NUM_ENTRIES;
 
 	for (i = 0; i < qp->tx_max_entry; i++) {
-		entry = kzalloc_node(sizeof(*entry), GFP_ATOMIC, node);
+		entry = kzalloc_node(sizeof(*entry), GFP_KERNEL, node);
 		if (!entry)
 			goto err2;