obj-$(CONFIG_NTB_INTEL) += ntb_hw_intel.o
+ntb_hw_intel-y := ntb_hw_gen1.o ntb_hw_gen3.o
--- /dev/null
+/*
+ * 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 Intel Corporation. All rights reserved.
+ * Copyright (C) 2015 EMC Corporation. All Rights Reserved.
+ * Copyright (C) 2016 T-Platforms. 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 Intel Corporation. All rights reserved.
+ * Copyright (C) 2015 EMC Corporation. All Rights Reserved.
+ * Copyright (C) 2016 T-Platforms. 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 NTB Linux driver
+ *
+ * Contact Information:
+ * Jon Mason <jon.mason@intel.com>
+ */
+
+#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"
+
+#define NTB_NAME "ntb_hw_intel"
+#define NTB_DESC "Intel(R) PCI-E Non-Transparent Bridge Driver"
+#define NTB_VER "2.0"
+
+MODULE_DESCRIPTION(NTB_DESC);
+MODULE_VERSION(NTB_VER);
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_AUTHOR("Intel Corporation");
+
+#define bar0_off(base, bar) ((base) + ((bar) << 2))
+#define bar2_off(base, bar) bar0_off(base, (bar) - 2)
+
+static const struct intel_ntb_reg xeon_reg;
+static const struct intel_ntb_alt_reg xeon_pri_reg;
+static const struct intel_ntb_alt_reg xeon_sec_reg;
+static const struct intel_ntb_alt_reg xeon_b2b_reg;
+static const struct intel_ntb_xlat_reg xeon_pri_xlat;
+static const struct intel_ntb_xlat_reg xeon_sec_xlat;
+static const struct ntb_dev_ops intel_ntb_ops;
+
+static const struct file_operations intel_ntb_debugfs_info;
+static struct dentry *debugfs_dir;
+
+static int b2b_mw_idx = -1;
+module_param(b2b_mw_idx, int, 0644);
+MODULE_PARM_DESC(b2b_mw_idx, "Use this mw idx to access the peer ntb. A "
+ "value of zero or positive starts from first mw idx, and a "
+ "negative value starts from last mw idx. Both sides MUST "
+ "set the same value here!");
+
+static unsigned int b2b_mw_share;
+module_param(b2b_mw_share, uint, 0644);
+MODULE_PARM_DESC(b2b_mw_share, "If the b2b mw is large enough, configure the "
+ "ntb so that the peer ntb only occupies the first half of "
+ "the mw, so the second half can still be used as a mw. Both "
+ "sides MUST set the same value here!");
+
+module_param_named(xeon_b2b_usd_bar2_addr64,
+ xeon_b2b_usd_addr.bar2_addr64, ullong, 0644);
+MODULE_PARM_DESC(xeon_b2b_usd_bar2_addr64,
+ "XEON B2B USD BAR 2 64-bit address");
+
+module_param_named(xeon_b2b_usd_bar4_addr64,
+ xeon_b2b_usd_addr.bar4_addr64, ullong, 0644);
+MODULE_PARM_DESC(xeon_b2b_usd_bar4_addr64,
+ "XEON B2B USD BAR 4 64-bit address");
+
+module_param_named(xeon_b2b_usd_bar4_addr32,
+ xeon_b2b_usd_addr.bar4_addr32, ullong, 0644);
+MODULE_PARM_DESC(xeon_b2b_usd_bar4_addr32,
+ "XEON B2B USD split-BAR 4 32-bit address");
+
+module_param_named(xeon_b2b_usd_bar5_addr32,
+ xeon_b2b_usd_addr.bar5_addr32, ullong, 0644);
+MODULE_PARM_DESC(xeon_b2b_usd_bar5_addr32,
+ "XEON B2B USD split-BAR 5 32-bit address");
+
+module_param_named(xeon_b2b_dsd_bar2_addr64,
+ xeon_b2b_dsd_addr.bar2_addr64, ullong, 0644);
+MODULE_PARM_DESC(xeon_b2b_dsd_bar2_addr64,
+ "XEON B2B DSD BAR 2 64-bit address");
+
+module_param_named(xeon_b2b_dsd_bar4_addr64,
+ xeon_b2b_dsd_addr.bar4_addr64, ullong, 0644);
+MODULE_PARM_DESC(xeon_b2b_dsd_bar4_addr64,
+ "XEON B2B DSD BAR 4 64-bit address");
+
+module_param_named(xeon_b2b_dsd_bar4_addr32,
+ xeon_b2b_dsd_addr.bar4_addr32, ullong, 0644);
+MODULE_PARM_DESC(xeon_b2b_dsd_bar4_addr32,
+ "XEON B2B DSD split-BAR 4 32-bit address");
+
+module_param_named(xeon_b2b_dsd_bar5_addr32,
+ xeon_b2b_dsd_addr.bar5_addr32, ullong, 0644);
+MODULE_PARM_DESC(xeon_b2b_dsd_bar5_addr32,
+ "XEON B2B DSD split-BAR 5 32-bit address");
+
+
+static int xeon_init_isr(struct intel_ntb_dev *ndev);
+
+static inline void ndev_reset_unsafe_flags(struct intel_ntb_dev *ndev)
+{
+ ndev->unsafe_flags = 0;
+ ndev->unsafe_flags_ignore = 0;
+
+ /* Only B2B has a workaround to avoid SDOORBELL */
+ if (ndev->hwerr_flags & NTB_HWERR_SDOORBELL_LOCKUP)
+ if (!ntb_topo_is_b2b(ndev->ntb.topo))
+ ndev->unsafe_flags |= NTB_UNSAFE_DB;
+
+ /* No low level workaround to avoid SB01BASE */
+ if (ndev->hwerr_flags & NTB_HWERR_SB01BASE_LOCKUP) {
+ ndev->unsafe_flags |= NTB_UNSAFE_DB;
+ ndev->unsafe_flags |= NTB_UNSAFE_SPAD;
+ }
+}
+
+static inline int ndev_is_unsafe(struct intel_ntb_dev *ndev,
+ unsigned long flag)
+{
+ return !!(flag & ndev->unsafe_flags & ~ndev->unsafe_flags_ignore);
+}
+
+static inline int ndev_ignore_unsafe(struct intel_ntb_dev *ndev,
+ unsigned long flag)
+{
+ flag &= ndev->unsafe_flags;
+ ndev->unsafe_flags_ignore |= flag;
+
+ return !!flag;
+}
+
+int ndev_mw_to_bar(struct intel_ntb_dev *ndev, int idx)
+{
+ if (idx < 0 || idx >= ndev->mw_count)
+ return -EINVAL;
+ return ndev->reg->mw_bar[idx];
+}
+
+static inline int ndev_db_addr(struct intel_ntb_dev *ndev,
+ phys_addr_t *db_addr, resource_size_t *db_size,
+ phys_addr_t reg_addr, unsigned long reg)
+{
+ if (ndev_is_unsafe(ndev, NTB_UNSAFE_DB))
+ pr_warn_once("%s: NTB unsafe doorbell access", __func__);
+
+ if (db_addr) {
+ *db_addr = reg_addr + reg;
+ dev_dbg(&ndev->ntb.pdev->dev, "Peer db addr %llx\n", *db_addr);
+ }
+
+ if (db_size) {
+ *db_size = ndev->reg->db_size;
+ dev_dbg(&ndev->ntb.pdev->dev, "Peer db size %llx\n", *db_size);
+ }
+
+ return 0;
+}
+
+u64 ndev_db_read(struct intel_ntb_dev *ndev,
+ void __iomem *mmio)
+{
+ if (ndev_is_unsafe(ndev, NTB_UNSAFE_DB))
+ pr_warn_once("%s: NTB unsafe doorbell access", __func__);
+
+ return ndev->reg->db_ioread(mmio);
+}
+
+int ndev_db_write(struct intel_ntb_dev *ndev, u64 db_bits,
+ void __iomem *mmio)
+{
+ if (ndev_is_unsafe(ndev, NTB_UNSAFE_DB))
+ pr_warn_once("%s: NTB unsafe doorbell access", __func__);
+
+ if (db_bits & ~ndev->db_valid_mask)
+ return -EINVAL;
+
+ ndev->reg->db_iowrite(db_bits, mmio);
+
+ return 0;
+}
+
+static inline int ndev_db_set_mask(struct intel_ntb_dev *ndev, u64 db_bits,
+ void __iomem *mmio)
+{
+ unsigned long irqflags;
+
+ if (ndev_is_unsafe(ndev, NTB_UNSAFE_DB))
+ pr_warn_once("%s: NTB unsafe doorbell access", __func__);
+
+ if (db_bits & ~ndev->db_valid_mask)
+ return -EINVAL;
+
+ spin_lock_irqsave(&ndev->db_mask_lock, irqflags);
+ {
+ ndev->db_mask |= db_bits;
+ ndev->reg->db_iowrite(ndev->db_mask, mmio);
+ }
+ spin_unlock_irqrestore(&ndev->db_mask_lock, irqflags);
+
+ return 0;
+}
+
+static inline int ndev_db_clear_mask(struct intel_ntb_dev *ndev, u64 db_bits,
+ void __iomem *mmio)
+{
+ unsigned long irqflags;
+
+ if (ndev_is_unsafe(ndev, NTB_UNSAFE_DB))
+ pr_warn_once("%s: NTB unsafe doorbell access", __func__);
+
+ if (db_bits & ~ndev->db_valid_mask)
+ return -EINVAL;
+
+ spin_lock_irqsave(&ndev->db_mask_lock, irqflags);
+ {
+ ndev->db_mask &= ~db_bits;
+ ndev->reg->db_iowrite(ndev->db_mask, mmio);
+ }
+ spin_unlock_irqrestore(&ndev->db_mask_lock, irqflags);
+
+ return 0;
+}
+
+static inline int ndev_vec_mask(struct intel_ntb_dev *ndev, int db_vector)
+{
+ u64 shift, mask;
+
+ shift = ndev->db_vec_shift;
+ mask = BIT_ULL(shift) - 1;
+
+ return mask << (shift * db_vector);
+}
+
+static inline int ndev_spad_addr(struct intel_ntb_dev *ndev, int idx,
+ phys_addr_t *spad_addr, phys_addr_t reg_addr,
+ unsigned long reg)
+{
+ if (ndev_is_unsafe(ndev, NTB_UNSAFE_SPAD))
+ pr_warn_once("%s: NTB unsafe scratchpad access", __func__);
+
+ if (idx < 0 || idx >= ndev->spad_count)
+ return -EINVAL;
+
+ if (spad_addr) {
+ *spad_addr = reg_addr + reg + (idx << 2);
+ dev_dbg(&ndev->ntb.pdev->dev, "Peer spad addr %llx\n",
+ *spad_addr);
+ }
+
+ return 0;
+}
+
+static inline u32 ndev_spad_read(struct intel_ntb_dev *ndev, int idx,
+ void __iomem *mmio)
+{
+ if (ndev_is_unsafe(ndev, NTB_UNSAFE_SPAD))
+ pr_warn_once("%s: NTB unsafe scratchpad access", __func__);
+
+ if (idx < 0 || idx >= ndev->spad_count)
+ return 0;
+
+ return ioread32(mmio + (idx << 2));
+}
+
+static inline int ndev_spad_write(struct intel_ntb_dev *ndev, int idx, u32 val,
+ void __iomem *mmio)
+{
+ if (ndev_is_unsafe(ndev, NTB_UNSAFE_SPAD))
+ pr_warn_once("%s: NTB unsafe scratchpad access", __func__);
+
+ if (idx < 0 || idx >= ndev->spad_count)
+ return -EINVAL;
+
+ iowrite32(val, mmio + (idx << 2));
+
+ return 0;
+}
+
+static irqreturn_t ndev_interrupt(struct intel_ntb_dev *ndev, int vec)
+{
+ u64 vec_mask;
+
+ vec_mask = ndev_vec_mask(ndev, vec);
+
+ if ((ndev->hwerr_flags & NTB_HWERR_MSIX_VECTOR32_BAD) && (vec == 31))
+ vec_mask |= ndev->db_link_mask;
+
+ dev_dbg(&ndev->ntb.pdev->dev, "vec %d vec_mask %llx\n", vec, vec_mask);
+
+ ndev->last_ts = jiffies;
+
+ if (vec_mask & ndev->db_link_mask) {
+ if (ndev->reg->poll_link(ndev))
+ ntb_link_event(&ndev->ntb);
+ }
+
+ if (vec_mask & ndev->db_valid_mask)
+ ntb_db_event(&ndev->ntb, vec);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t ndev_vec_isr(int irq, void *dev)
+{
+ struct intel_ntb_vec *nvec = dev;
+
+ dev_dbg(&nvec->ndev->ntb.pdev->dev, "irq: %d nvec->num: %d\n",
+ irq, nvec->num);
+
+ return ndev_interrupt(nvec->ndev, nvec->num);
+}
+
+static irqreturn_t ndev_irq_isr(int irq, void *dev)
+{
+ struct intel_ntb_dev *ndev = dev;
+
+ return ndev_interrupt(ndev, irq - ndev->ntb.pdev->irq);
+}
+
+int ndev_init_isr(struct intel_ntb_dev *ndev,
+ int msix_min, int msix_max,
+ int msix_shift, int total_shift)
+{
+ struct pci_dev *pdev;
+ int rc, i, msix_count, node;
+
+ pdev = ndev->ntb.pdev;
+
+ node = dev_to_node(&pdev->dev);
+
+ /* Mask all doorbell interrupts */
+ ndev->db_mask = ndev->db_valid_mask;
+ ndev->reg->db_iowrite(ndev->db_mask,
+ ndev->self_mmio +
+ ndev->self_reg->db_mask);
+
+ /* Try to set up msix irq */
+
+ ndev->vec = kzalloc_node(msix_max * sizeof(*ndev->vec),
+ GFP_KERNEL, node);
+ if (!ndev->vec)
+ goto err_msix_vec_alloc;
+
+ ndev->msix = kzalloc_node(msix_max * sizeof(*ndev->msix),
+ GFP_KERNEL, node);
+ if (!ndev->msix)
+ goto err_msix_alloc;
+
+ for (i = 0; i < msix_max; ++i)
+ ndev->msix[i].entry = i;
+
+ msix_count = pci_enable_msix_range(pdev, ndev->msix,
+ msix_min, msix_max);
+ if (msix_count < 0)
+ goto err_msix_enable;
+
+ for (i = 0; i < msix_count; ++i) {
+ ndev->vec[i].ndev = ndev;
+ ndev->vec[i].num = i;
+ rc = request_irq(ndev->msix[i].vector, ndev_vec_isr, 0,
+ "ndev_vec_isr", &ndev->vec[i]);
+ if (rc)
+ goto err_msix_request;
+ }
+
+ dev_dbg(&pdev->dev, "Using %d msix interrupts\n", msix_count);
+ ndev->db_vec_count = msix_count;
+ ndev->db_vec_shift = msix_shift;
+ return 0;
+
+err_msix_request:
+ while (i-- > 0)
+ free_irq(ndev->msix[i].vector, &ndev->vec[i]);
+ pci_disable_msix(pdev);
+err_msix_enable:
+ kfree(ndev->msix);
+err_msix_alloc:
+ kfree(ndev->vec);
+err_msix_vec_alloc:
+ ndev->msix = NULL;
+ ndev->vec = NULL;
+
+ /* Try to set up msi irq */
+
+ rc = pci_enable_msi(pdev);
+ if (rc)
+ goto err_msi_enable;
+
+ rc = request_irq(pdev->irq, ndev_irq_isr, 0,
+ "ndev_irq_isr", ndev);
+ if (rc)
+ goto err_msi_request;
+
+ dev_dbg(&pdev->dev, "Using msi interrupts\n");
+ ndev->db_vec_count = 1;
+ ndev->db_vec_shift = total_shift;
+ return 0;
+
+err_msi_request:
+ pci_disable_msi(pdev);
+err_msi_enable:
+
+ /* Try to set up intx irq */
+
+ pci_intx(pdev, 1);
+
+ rc = request_irq(pdev->irq, ndev_irq_isr, IRQF_SHARED,
+ "ndev_irq_isr", ndev);
+ if (rc)
+ goto err_intx_request;
+
+ dev_dbg(&pdev->dev, "Using intx interrupts\n");
+ ndev->db_vec_count = 1;
+ ndev->db_vec_shift = total_shift;
+ return 0;
+
+err_intx_request:
+ return rc;
+}
+
+static void ndev_deinit_isr(struct intel_ntb_dev *ndev)
+{
+ struct pci_dev *pdev;
+ int i;
+
+ pdev = ndev->ntb.pdev;
+
+ /* Mask all doorbell interrupts */
+ ndev->db_mask = ndev->db_valid_mask;
+ ndev->reg->db_iowrite(ndev->db_mask,
+ ndev->self_mmio +
+ ndev->self_reg->db_mask);
+
+ if (ndev->msix) {
+ i = ndev->db_vec_count;
+ while (i--)
+ free_irq(ndev->msix[i].vector, &ndev->vec[i]);
+ pci_disable_msix(pdev);
+ kfree(ndev->msix);
+ kfree(ndev->vec);
+ } else {
+ free_irq(pdev->irq, ndev);
+ if (pci_dev_msi_enabled(pdev))
+ pci_disable_msi(pdev);
+ }
+}
+
+static ssize_t ndev_ntb_debugfs_read(struct file *filp, char __user *ubuf,
+ size_t count, loff_t *offp)
+{
+ struct intel_ntb_dev *ndev;
+ struct pci_dev *pdev;
+ void __iomem *mmio;
+ char *buf;
+ size_t buf_size;
+ ssize_t ret, off;
+ union { u64 v64; u32 v32; u16 v16; u8 v8; } u;
+
+ ndev = filp->private_data;
+ pdev = ndev->ntb.pdev;
+ 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));
+
+ if (ndev->b2b_idx != UINT_MAX) {
+ off += scnprintf(buf + off, buf_size - off,
+ "B2B MW Idx -\t\t%u\n", ndev->b2b_idx);
+ off += scnprintf(buf + off, buf_size - off,
+ "B2B Offset -\t\t%#lx\n", ndev->b2b_off);
+ }
+
+ off += scnprintf(buf + off, buf_size - off,
+ "BAR4 Split -\t\t%s\n",
+ ndev->bar4_split ? "yes" : "no");
+
+ 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 Window Size:\n");
+
+ pci_read_config_byte(pdev, XEON_PBAR23SZ_OFFSET, &u.v8);
+ off += scnprintf(buf + off, buf_size - off,
+ "PBAR23SZ %hhu\n", u.v8);
+ if (!ndev->bar4_split) {
+ pci_read_config_byte(pdev, XEON_PBAR45SZ_OFFSET, &u.v8);
+ off += scnprintf(buf + off, buf_size - off,
+ "PBAR45SZ %hhu\n", u.v8);
+ } else {
+ pci_read_config_byte(pdev, XEON_PBAR4SZ_OFFSET, &u.v8);
+ off += scnprintf(buf + off, buf_size - off,
+ "PBAR4SZ %hhu\n", u.v8);
+ pci_read_config_byte(pdev, XEON_PBAR5SZ_OFFSET, &u.v8);
+ off += scnprintf(buf + off, buf_size - off,
+ "PBAR5SZ %hhu\n", u.v8);
+ }
+
+ pci_read_config_byte(pdev, XEON_SBAR23SZ_OFFSET, &u.v8);
+ off += scnprintf(buf + off, buf_size - off,
+ "SBAR23SZ %hhu\n", u.v8);
+ if (!ndev->bar4_split) {
+ pci_read_config_byte(pdev, XEON_SBAR45SZ_OFFSET, &u.v8);
+ off += scnprintf(buf + off, buf_size - off,
+ "SBAR45SZ %hhu\n", u.v8);
+ } else {
+ pci_read_config_byte(pdev, XEON_SBAR4SZ_OFFSET, &u.v8);
+ off += scnprintf(buf + off, buf_size - off,
+ "SBAR4SZ %hhu\n", u.v8);
+ pci_read_config_byte(pdev, XEON_SBAR5SZ_OFFSET, &u.v8);
+ off += scnprintf(buf + off, buf_size - off,
+ "SBAR5SZ %hhu\n", u.v8);
+ }
+
+ off += scnprintf(buf + off, buf_size - off,
+ "\nNTB Incoming XLAT:\n");
+
+ u.v64 = ioread64(mmio + bar2_off(ndev->xlat_reg->bar2_xlat, 2));
+ off += scnprintf(buf + off, buf_size - off,
+ "XLAT23 -\t\t%#018llx\n", u.v64);
+
+ if (ndev->bar4_split) {
+ u.v32 = ioread32(mmio + bar2_off(ndev->xlat_reg->bar2_xlat, 4));
+ off += scnprintf(buf + off, buf_size - off,
+ "XLAT4 -\t\t\t%#06x\n", u.v32);
+
+ u.v32 = ioread32(mmio + bar2_off(ndev->xlat_reg->bar2_xlat, 5));
+ off += scnprintf(buf + off, buf_size - off,
+ "XLAT5 -\t\t\t%#06x\n", u.v32);
+ } else {
+ u.v64 = ioread64(mmio + bar2_off(ndev->xlat_reg->bar2_xlat, 4));
+ off += scnprintf(buf + off, buf_size - off,
+ "XLAT45 -\t\t%#018llx\n", u.v64);
+ }
+
+ u.v64 = ioread64(mmio + bar2_off(ndev->xlat_reg->bar2_limit, 2));
+ off += scnprintf(buf + off, buf_size - off,
+ "LMT23 -\t\t\t%#018llx\n", u.v64);
+
+ if (ndev->bar4_split) {
+ u.v32 = ioread32(mmio + bar2_off(ndev->xlat_reg->bar2_limit, 4));
+ off += scnprintf(buf + off, buf_size - off,
+ "LMT4 -\t\t\t%#06x\n", u.v32);
+ u.v32 = ioread32(mmio + bar2_off(ndev->xlat_reg->bar2_limit, 5));
+ off += scnprintf(buf + off, buf_size - off,
+ "LMT5 -\t\t\t%#06x\n", u.v32);
+ } else {
+ u.v64 = ioread64(mmio + bar2_off(ndev->xlat_reg->bar2_limit, 4));
+ off += scnprintf(buf + off, buf_size - off,
+ "LMT45 -\t\t\t%#018llx\n", u.v64);
+ }
+
+ if (pdev_is_xeon(pdev)) {
+ if (ntb_topo_is_b2b(ndev->ntb.topo)) {
+ off += scnprintf(buf + off, buf_size - off,
+ "\nNTB Outgoing B2B XLAT:\n");
+
+ u.v64 = ioread64(mmio + XEON_PBAR23XLAT_OFFSET);
+ off += scnprintf(buf + off, buf_size - off,
+ "B2B XLAT23 -\t\t%#018llx\n", u.v64);
+
+ if (ndev->bar4_split) {
+ u.v32 = ioread32(mmio + XEON_PBAR4XLAT_OFFSET);
+ off += scnprintf(buf + off, buf_size - off,
+ "B2B XLAT4 -\t\t%#06x\n",
+ u.v32);
+ u.v32 = ioread32(mmio + XEON_PBAR5XLAT_OFFSET);
+ off += scnprintf(buf + off, buf_size - off,
+ "B2B XLAT5 -\t\t%#06x\n",
+ u.v32);
+ } else {
+ u.v64 = ioread64(mmio + XEON_PBAR45XLAT_OFFSET);
+ off += scnprintf(buf + off, buf_size - off,
+ "B2B XLAT45 -\t\t%#018llx\n",
+ u.v64);
+ }
+
+ u.v64 = ioread64(mmio + XEON_PBAR23LMT_OFFSET);
+ off += scnprintf(buf + off, buf_size - off,
+ "B2B LMT23 -\t\t%#018llx\n", u.v64);
+
+ if (ndev->bar4_split) {
+ u.v32 = ioread32(mmio + XEON_PBAR4LMT_OFFSET);
+ off += scnprintf(buf + off, buf_size - off,
+ "B2B LMT4 -\t\t%#06x\n",
+ u.v32);
+ u.v32 = ioread32(mmio + XEON_PBAR5LMT_OFFSET);
+ off += scnprintf(buf + off, buf_size - off,
+ "B2B LMT5 -\t\t%#06x\n",
+ u.v32);
+ } else {
+ u.v64 = ioread64(mmio + XEON_PBAR45LMT_OFFSET);
+ off += scnprintf(buf + off, buf_size - off,
+ "B2B LMT45 -\t\t%#018llx\n",
+ u.v64);
+ }
+
+ off += scnprintf(buf + off, buf_size - off,
+ "\nNTB Secondary BAR:\n");
+
+ u.v64 = ioread64(mmio + XEON_SBAR0BASE_OFFSET);
+ off += scnprintf(buf + off, buf_size - off,
+ "SBAR01 -\t\t%#018llx\n", u.v64);
+
+ u.v64 = ioread64(mmio + XEON_SBAR23BASE_OFFSET);
+ off += scnprintf(buf + off, buf_size - off,
+ "SBAR23 -\t\t%#018llx\n", u.v64);
+
+ if (ndev->bar4_split) {
+ u.v32 = ioread32(mmio + XEON_SBAR4BASE_OFFSET);
+ off += scnprintf(buf + off, buf_size - off,
+ "SBAR4 -\t\t\t%#06x\n", u.v32);
+ u.v32 = ioread32(mmio + XEON_SBAR5BASE_OFFSET);
+ off += scnprintf(buf + off, buf_size - off,
+ "SBAR5 -\t\t\t%#06x\n", u.v32);
+ } else {
+ u.v64 = ioread64(mmio + XEON_SBAR45BASE_OFFSET);
+ off += scnprintf(buf + off, buf_size - off,
+ "SBAR45 -\t\t%#018llx\n",
+ u.v64);
+ }
+ }
+
+ off += scnprintf(buf + off, buf_size - off,
+ "\nXEON NTB Statistics:\n");
+
+ u.v16 = ioread16(mmio + XEON_USMEMMISS_OFFSET);
+ off += scnprintf(buf + off, buf_size - off,
+ "Upstream Memory Miss -\t%u\n", u.v16);
+
+ off += scnprintf(buf + off, buf_size - off,
+ "\nXEON NTB Hardware Errors:\n");
+
+ if (!pci_read_config_word(pdev,
+ XEON_DEVSTS_OFFSET, &u.v16))
+ off += scnprintf(buf + off, buf_size - off,
+ "DEVSTS -\t\t%#06x\n", u.v16);
+
+ if (!pci_read_config_word(pdev,
+ XEON_LINK_STATUS_OFFSET, &u.v16))
+ off += scnprintf(buf + off, buf_size - off,
+ "LNKSTS -\t\t%#06x\n", u.v16);
+
+ if (!pci_read_config_dword(pdev,
+ XEON_UNCERRSTS_OFFSET, &u.v32))
+ off += scnprintf(buf + off, buf_size - off,
+ "UNCERRSTS -\t\t%#06x\n", u.v32);
+
+ if (!pci_read_config_dword(pdev,
+ XEON_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 ssize_t ndev_debugfs_read(struct file *filp, char __user *ubuf,
+ size_t count, loff_t *offp)
+{
+ struct intel_ntb_dev *ndev = filp->private_data;
+
+ if (pdev_is_xeon(ndev->ntb.pdev))
+ return ndev_ntb_debugfs_read(filp, ubuf, count, offp);
+ else if (pdev_is_skx_xeon(ndev->ntb.pdev))
+ return ndev_ntb3_debugfs_read(filp, ubuf, count, offp);
+
+ return -ENXIO;
+}
+
+static void ndev_init_debugfs(struct intel_ntb_dev *ndev)
+{
+ if (!debugfs_dir) {
+ ndev->debugfs_dir = NULL;
+ ndev->debugfs_info = NULL;
+ } else {
+ ndev->debugfs_dir =
+ debugfs_create_dir(pci_name(ndev->ntb.pdev),
+ debugfs_dir);
+ if (!ndev->debugfs_dir)
+ ndev->debugfs_info = NULL;
+ else
+ ndev->debugfs_info =
+ debugfs_create_file("info", S_IRUSR,
+ ndev->debugfs_dir, ndev,
+ &intel_ntb_debugfs_info);
+ }
+}
+
+static void ndev_deinit_debugfs(struct intel_ntb_dev *ndev)
+{
+ debugfs_remove_recursive(ndev->debugfs_dir);
+}
+
+int intel_ntb_mw_count(struct ntb_dev *ntb, int pidx)
+{
+ if (pidx != NTB_DEF_PEER_IDX)
+ return -EINVAL;
+
+ return ntb_ndev(ntb)->mw_count;
+}
+
+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)
+{
+ struct intel_ntb_dev *ndev = ntb_ndev(ntb);
+ resource_size_t bar_size, mw_size;
+ 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;
+
+ if (addr_align)
+ *addr_align = pci_resource_len(ndev->ntb.pdev, bar);
+
+ if (size_align)
+ *size_align = 1;
+
+ if (size_max)
+ *size_max = mw_size;
+
+ return 0;
+}
+
+static int intel_ntb_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 base_reg, 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;
+ base_reg = bar0_off(ndev->xlat_reg->bar0_base, bar);
+ xlat_reg = bar2_off(ndev->xlat_reg->bar2_xlat, bar);
+ limit_reg = bar2_off(ndev->xlat_reg->bar2_limit, bar);
+
+ if (bar < 4 || !ndev->bar4_split) {
+ base = ioread64(mmio + base_reg) & NTB_BAR_MASK_64;
+
+ /* Set the limit if supported, if size is not mw_size */
+ if (limit_reg && size != mw_size)
+ limit = base + size;
+ else
+ limit = 0;
+
+ /* 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;
+ }
+
+ /* 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;
+ }
+ } else {
+ /* split bar addr range must all be 32 bit */
+ if (addr & (~0ull << 32))
+ return -EINVAL;
+ if ((addr + size) & (~0ull << 32))
+ return -EINVAL;
+
+ base = ioread32(mmio + base_reg) & NTB_BAR_MASK_32;
+
+ /* Set the limit if supported, if size is not mw_size */
+ if (limit_reg && size != mw_size)
+ limit = base + size;
+ else
+ limit = 0;
+
+ /* set and verify setting the translation address */
+ iowrite32(addr, mmio + xlat_reg);
+ reg_val = ioread32(mmio + xlat_reg);
+ if (reg_val != addr) {
+ iowrite32(0, mmio + xlat_reg);
+ return -EIO;
+ }
+
+ /* set and verify setting the limit */
+ iowrite32(limit, mmio + limit_reg);
+ reg_val = ioread32(mmio + limit_reg);
+ if (reg_val != limit) {
+ iowrite32(base, mmio + limit_reg);
+ iowrite32(0, mmio + xlat_reg);
+ return -EIO;
+ }
+ }
+
+ return 0;
+}
+
+u64 intel_ntb_link_is_up(struct ntb_dev *ntb, enum ntb_speed *speed,
+ enum ntb_width *width)
+{
+ struct intel_ntb_dev *ndev = ntb_ndev(ntb);
+
+ if (ndev->reg->link_is_up(ndev)) {
+ if (speed)
+ *speed = NTB_LNK_STA_SPEED(ndev->lnk_sta);
+ if (width)
+ *width = NTB_LNK_STA_WIDTH(ndev->lnk_sta);
+ return 1;
+ } else {
+ /* TODO MAYBE: is it possible to observe the link speed and
+ * width while link is training? */
+ if (speed)
+ *speed = NTB_SPEED_NONE;
+ if (width)
+ *width = NTB_WIDTH_NONE;
+ return 0;
+ }
+}
+
+static int intel_ntb_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);
+
+ if (ndev->ntb.topo == NTB_TOPO_SEC)
+ return -EINVAL;
+
+ 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;
+ if (ndev->bar4_split)
+ ntb_ctl |= NTB_CTL_P2S_BAR5_SNOOP | NTB_CTL_S2P_BAR5_SNOOP;
+ iowrite32(ntb_ctl, ndev->self_mmio + ndev->reg->ntb_ctl);
+
+ return 0;
+}
+
+int intel_ntb_link_disable(struct ntb_dev *ntb)
+{
+ struct intel_ntb_dev *ndev;
+ u32 ntb_cntl;
+
+ ndev = container_of(ntb, struct intel_ntb_dev, ntb);
+
+ if (ndev->ntb.topo == NTB_TOPO_SEC)
+ return -EINVAL;
+
+ dev_dbg(&ntb->pdev->dev, "Disabling link\n");
+
+ /* Bring NTB link down */
+ ntb_cntl = ioread32(ndev->self_mmio + ndev->reg->ntb_ctl);
+ ntb_cntl &= ~(NTB_CTL_P2S_BAR2_SNOOP | NTB_CTL_S2P_BAR2_SNOOP);
+ ntb_cntl &= ~(NTB_CTL_P2S_BAR4_SNOOP | NTB_CTL_S2P_BAR4_SNOOP);
+ if (ndev->bar4_split)
+ ntb_cntl &= ~(NTB_CTL_P2S_BAR5_SNOOP | NTB_CTL_S2P_BAR5_SNOOP);
+ ntb_cntl |= NTB_CTL_DISABLE | NTB_CTL_CFG_LOCK;
+ iowrite32(ntb_cntl, ndev->self_mmio + ndev->reg->ntb_ctl);
+
+ return 0;
+}
+
+int intel_ntb_peer_mw_count(struct ntb_dev *ntb)
+{
+ /* Numbers of inbound and outbound memory windows match */
+ return ntb_ndev(ntb)->mw_count;
+}
+
+int intel_ntb_peer_mw_get_addr(struct ntb_dev *ntb, int idx,
+ phys_addr_t *base, resource_size_t *size)
+{
+ struct intel_ntb_dev *ndev = ntb_ndev(ntb);
+ int bar;
+
+ if (idx >= ndev->b2b_idx && !ndev->b2b_off)
+ idx += 1;
+
+ bar = ndev_mw_to_bar(ndev, idx);
+ if (bar < 0)
+ return bar;
+
+ if (base)
+ *base = pci_resource_start(ndev->ntb.pdev, bar) +
+ (idx == ndev->b2b_idx ? ndev->b2b_off : 0);
+
+ if (size)
+ *size = pci_resource_len(ndev->ntb.pdev, bar) -
+ (idx == ndev->b2b_idx ? ndev->b2b_off : 0);
+
+ return 0;
+}
+
+static int intel_ntb_db_is_unsafe(struct ntb_dev *ntb)
+{
+ return ndev_ignore_unsafe(ntb_ndev(ntb), NTB_UNSAFE_DB);
+}
+
+u64 intel_ntb_db_valid_mask(struct ntb_dev *ntb)
+{
+ return ntb_ndev(ntb)->db_valid_mask;
+}
+
+int intel_ntb_db_vector_count(struct ntb_dev *ntb)
+{
+ struct intel_ntb_dev *ndev;
+
+ ndev = container_of(ntb, struct intel_ntb_dev, ntb);
+
+ return ndev->db_vec_count;
+}
+
+u64 intel_ntb_db_vector_mask(struct ntb_dev *ntb, int db_vector)
+{
+ struct intel_ntb_dev *ndev = ntb_ndev(ntb);
+
+ if (db_vector < 0 || db_vector > ndev->db_vec_count)
+ return 0;
+
+ return ndev->db_valid_mask & ndev_vec_mask(ndev, db_vector);
+}
+
+static u64 intel_ntb_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_bell);
+}
+
+static int intel_ntb_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_bell);
+}
+
+int intel_ntb_db_set_mask(struct ntb_dev *ntb, u64 db_bits)
+{
+ struct intel_ntb_dev *ndev = ntb_ndev(ntb);
+
+ return ndev_db_set_mask(ndev, db_bits,
+ ndev->self_mmio +
+ ndev->self_reg->db_mask);
+}
+
+int intel_ntb_db_clear_mask(struct ntb_dev *ntb, u64 db_bits)
+{
+ struct intel_ntb_dev *ndev = ntb_ndev(ntb);
+
+ return ndev_db_clear_mask(ndev, db_bits,
+ ndev->self_mmio +
+ ndev->self_reg->db_mask);
+}
+
+int intel_ntb_peer_db_addr(struct ntb_dev *ntb, phys_addr_t *db_addr,
+ resource_size_t *db_size)
+{
+ struct intel_ntb_dev *ndev = ntb_ndev(ntb);
+
+ return ndev_db_addr(ndev, db_addr, db_size, ndev->peer_addr,
+ ndev->peer_reg->db_bell);
+}
+
+static int intel_ntb_peer_db_set(struct ntb_dev *ntb, u64 db_bits)
+{
+ struct intel_ntb_dev *ndev = ntb_ndev(ntb);
+
+ return ndev_db_write(ndev, db_bits,
+ ndev->peer_mmio +
+ ndev->peer_reg->db_bell);
+}
+
+int intel_ntb_spad_is_unsafe(struct ntb_dev *ntb)
+{
+ return ndev_ignore_unsafe(ntb_ndev(ntb), NTB_UNSAFE_SPAD);
+}
+
+int intel_ntb_spad_count(struct ntb_dev *ntb)
+{
+ struct intel_ntb_dev *ndev;
+
+ ndev = container_of(ntb, struct intel_ntb_dev, ntb);
+
+ return ndev->spad_count;
+}
+
+u32 intel_ntb_spad_read(struct ntb_dev *ntb, int idx)
+{
+ struct intel_ntb_dev *ndev = ntb_ndev(ntb);
+
+ return ndev_spad_read(ndev, idx,
+ ndev->self_mmio +
+ ndev->self_reg->spad);
+}
+
+int intel_ntb_spad_write(struct ntb_dev *ntb, int idx, u32 val)
+{
+ struct intel_ntb_dev *ndev = ntb_ndev(ntb);
+
+ return ndev_spad_write(ndev, idx, val,
+ ndev->self_mmio +
+ ndev->self_reg->spad);
+}
+
+int intel_ntb_peer_spad_addr(struct ntb_dev *ntb, int pidx, int sidx,
+ phys_addr_t *spad_addr)
+{
+ struct intel_ntb_dev *ndev = ntb_ndev(ntb);
+
+ return ndev_spad_addr(ndev, sidx, spad_addr, ndev->peer_addr,
+ ndev->peer_reg->spad);
+}
+
+u32 intel_ntb_peer_spad_read(struct ntb_dev *ntb, int pidx, int sidx)
+{
+ struct intel_ntb_dev *ndev = ntb_ndev(ntb);
+
+ return ndev_spad_read(ndev, sidx,
+ ndev->peer_mmio +
+ ndev->peer_reg->spad);
+}
+
+int intel_ntb_peer_spad_write(struct ntb_dev *ntb, int pidx, int sidx,
+ u32 val)
+{
+ struct intel_ntb_dev *ndev = ntb_ndev(ntb);
+
+ return ndev_spad_write(ndev, sidx, val,
+ ndev->peer_mmio +
+ ndev->peer_reg->spad);
+}
+
+static u64 xeon_db_ioread(void __iomem *mmio)
+{
+ return (u64)ioread16(mmio);
+}
+
+static void xeon_db_iowrite(u64 bits, void __iomem *mmio)
+{
+ iowrite16((u16)bits, mmio);
+}
+
+static int xeon_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_bell);
+
+ rc = pci_read_config_word(ndev->ntb.pdev,
+ XEON_LINK_STATUS_OFFSET, ®_val);
+ if (rc)
+ return 0;
+
+ if (reg_val == ndev->lnk_sta)
+ return 0;
+
+ ndev->lnk_sta = reg_val;
+
+ return 1;
+}
+
+int xeon_link_is_up(struct intel_ntb_dev *ndev)
+{
+ if (ndev->ntb.topo == NTB_TOPO_SEC)
+ return 1;
+
+ return NTB_LNK_STA_ACTIVE(ndev->lnk_sta);
+}
+
+enum ntb_topo xeon_ppd_topo(struct intel_ntb_dev *ndev, u8 ppd)
+{
+ switch (ppd & XEON_PPD_TOPO_MASK) {
+ case XEON_PPD_TOPO_B2B_USD:
+ return NTB_TOPO_B2B_USD;
+
+ case XEON_PPD_TOPO_B2B_DSD:
+ return NTB_TOPO_B2B_DSD;
+
+ case XEON_PPD_TOPO_PRI_USD:
+ case XEON_PPD_TOPO_PRI_DSD: /* accept bogus PRI_DSD */
+ return NTB_TOPO_PRI;
+
+ case XEON_PPD_TOPO_SEC_USD:
+ case XEON_PPD_TOPO_SEC_DSD: /* accept bogus SEC_DSD */
+ return NTB_TOPO_SEC;
+ }
+
+ return NTB_TOPO_NONE;
+}
+
+static inline int xeon_ppd_bar4_split(struct intel_ntb_dev *ndev, u8 ppd)
+{
+ if (ppd & XEON_PPD_SPLIT_BAR_MASK) {
+ dev_dbg(&ndev->ntb.pdev->dev, "PPD %d split bar\n", ppd);
+ return 1;
+ }
+ return 0;
+}
+
+static int xeon_init_isr(struct intel_ntb_dev *ndev)
+{
+ return ndev_init_isr(ndev, XEON_DB_MSIX_VECTOR_COUNT,
+ XEON_DB_MSIX_VECTOR_COUNT,
+ XEON_DB_MSIX_VECTOR_SHIFT,
+ XEON_DB_TOTAL_SHIFT);
+}
+
+static void xeon_deinit_isr(struct intel_ntb_dev *ndev)
+{
+ ndev_deinit_isr(ndev);
+}
+
+static int xeon_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;
+ resource_size_t bar_size;
+ phys_addr_t bar_addr;
+ int b2b_bar;
+ u8 bar_sz;
+
+ pdev = ndev->ntb.pdev;
+ mmio = ndev->self_mmio;
+
+ if (ndev->b2b_idx == UINT_MAX) {
+ dev_dbg(&pdev->dev, "not using b2b mw\n");
+ b2b_bar = 0;
+ ndev->b2b_off = 0;
+ } else {
+ b2b_bar = ndev_mw_to_bar(ndev, ndev->b2b_idx);
+ if (b2b_bar < 0)
+ return -EIO;
+
+ dev_dbg(&pdev->dev, "using b2b mw bar %d\n", b2b_bar);
+
+ bar_size = pci_resource_len(ndev->ntb.pdev, b2b_bar);
+
+ dev_dbg(&pdev->dev, "b2b bar size %#llx\n", bar_size);
+
+ if (b2b_mw_share && XEON_B2B_MIN_SIZE <= bar_size >> 1) {
+ dev_dbg(&pdev->dev, "b2b using first half of bar\n");
+ ndev->b2b_off = bar_size >> 1;
+ } else if (XEON_B2B_MIN_SIZE <= bar_size) {
+ dev_dbg(&pdev->dev, "b2b using whole bar\n");
+ ndev->b2b_off = 0;
+ --ndev->mw_count;
+ } else {
+ dev_dbg(&pdev->dev, "b2b bar size is too small\n");
+ return -EIO;
+ }
+ }
+
+ /* Reset the secondary bar sizes to match the primary bar sizes,
+ * except disable or halve the size of the b2b secondary bar.
+ *
+ * Note: code for each specific bar size register, because the register
+ * offsets are not in a consistent order (bar5sz comes after ppd, odd).
+ */
+ pci_read_config_byte(pdev, XEON_PBAR23SZ_OFFSET, &bar_sz);
+ dev_dbg(&pdev->dev, "PBAR23SZ %#x\n", bar_sz);
+ if (b2b_bar == 2) {
+ if (ndev->b2b_off)
+ bar_sz -= 1;
+ else
+ bar_sz = 0;
+ }
+ pci_write_config_byte(pdev, XEON_SBAR23SZ_OFFSET, bar_sz);
+ pci_read_config_byte(pdev, XEON_SBAR23SZ_OFFSET, &bar_sz);
+ dev_dbg(&pdev->dev, "SBAR23SZ %#x\n", bar_sz);
+
+ if (!ndev->bar4_split) {
+ pci_read_config_byte(pdev, XEON_PBAR45SZ_OFFSET, &bar_sz);
+ dev_dbg(&pdev->dev, "PBAR45SZ %#x\n", bar_sz);
+ if (b2b_bar == 4) {
+ if (ndev->b2b_off)
+ bar_sz -= 1;
+ else
+ bar_sz = 0;
+ }
+ pci_write_config_byte(pdev, XEON_SBAR45SZ_OFFSET, bar_sz);
+ pci_read_config_byte(pdev, XEON_SBAR45SZ_OFFSET, &bar_sz);
+ dev_dbg(&pdev->dev, "SBAR45SZ %#x\n", bar_sz);
+ } else {
+ pci_read_config_byte(pdev, XEON_PBAR4SZ_OFFSET, &bar_sz);
+ dev_dbg(&pdev->dev, "PBAR4SZ %#x\n", bar_sz);
+ if (b2b_bar == 4) {
+ if (ndev->b2b_off)
+ bar_sz -= 1;
+ else
+ bar_sz = 0;
+ }
+ pci_write_config_byte(pdev, XEON_SBAR4SZ_OFFSET, bar_sz);
+ pci_read_config_byte(pdev, XEON_SBAR4SZ_OFFSET, &bar_sz);
+ dev_dbg(&pdev->dev, "SBAR4SZ %#x\n", bar_sz);
+
+ pci_read_config_byte(pdev, XEON_PBAR5SZ_OFFSET, &bar_sz);
+ dev_dbg(&pdev->dev, "PBAR5SZ %#x\n", bar_sz);
+ if (b2b_bar == 5) {
+ if (ndev->b2b_off)
+ bar_sz -= 1;
+ else
+ bar_sz = 0;
+ }
+ pci_write_config_byte(pdev, XEON_SBAR5SZ_OFFSET, bar_sz);
+ pci_read_config_byte(pdev, XEON_SBAR5SZ_OFFSET, &bar_sz);
+ dev_dbg(&pdev->dev, "SBAR5SZ %#x\n", bar_sz);
+ }
+
+ /* SBAR01 hit by first part of the b2b bar */
+ if (b2b_bar == 0)
+ bar_addr = addr->bar0_addr;
+ else if (b2b_bar == 2)
+ bar_addr = addr->bar2_addr64;
+ else if (b2b_bar == 4 && !ndev->bar4_split)
+ bar_addr = addr->bar4_addr64;
+ else if (b2b_bar == 4)
+ bar_addr = addr->bar4_addr32;
+ else if (b2b_bar == 5)
+ bar_addr = addr->bar5_addr32;
+ else
+ return -EIO;
+
+ dev_dbg(&pdev->dev, "SBAR01 %#018llx\n", bar_addr);
+ iowrite64(bar_addr, mmio + XEON_SBAR0BASE_OFFSET);
+
+ /* Other SBAR are normally hit by the PBAR xlat, except for b2b bar.
+ * The b2b bar is either disabled above, or configured half-size, and
+ * it starts at the PBAR xlat + offset.
+ */
+
+ bar_addr = addr->bar2_addr64 + (b2b_bar == 2 ? ndev->b2b_off : 0);
+ iowrite64(bar_addr, mmio + XEON_SBAR23BASE_OFFSET);
+ bar_addr = ioread64(mmio + XEON_SBAR23BASE_OFFSET);
+ dev_dbg(&pdev->dev, "SBAR23 %#018llx\n", bar_addr);
+
+ if (!ndev->bar4_split) {
+ bar_addr = addr->bar4_addr64 +
+ (b2b_bar == 4 ? ndev->b2b_off : 0);
+ iowrite64(bar_addr, mmio + XEON_SBAR45BASE_OFFSET);
+ bar_addr = ioread64(mmio + XEON_SBAR45BASE_OFFSET);
+ dev_dbg(&pdev->dev, "SBAR45 %#018llx\n", bar_addr);
+ } else {
+ bar_addr = addr->bar4_addr32 +
+ (b2b_bar == 4 ? ndev->b2b_off : 0);
+ iowrite32(bar_addr, mmio + XEON_SBAR4BASE_OFFSET);
+ bar_addr = ioread32(mmio + XEON_SBAR4BASE_OFFSET);
+ dev_dbg(&pdev->dev, "SBAR4 %#010llx\n", bar_addr);
+
+ bar_addr = addr->bar5_addr32 +
+ (b2b_bar == 5 ? ndev->b2b_off : 0);
+ iowrite32(bar_addr, mmio + XEON_SBAR5BASE_OFFSET);
+ bar_addr = ioread32(mmio + XEON_SBAR5BASE_OFFSET);
+ dev_dbg(&pdev->dev, "SBAR5 %#010llx\n", bar_addr);
+ }
+
+ /* setup incoming bar limits == base addrs (zero length windows) */
+
+ bar_addr = addr->bar2_addr64 + (b2b_bar == 2 ? ndev->b2b_off : 0);
+ iowrite64(bar_addr, mmio + XEON_SBAR23LMT_OFFSET);
+ bar_addr = ioread64(mmio + XEON_SBAR23LMT_OFFSET);
+ dev_dbg(&pdev->dev, "SBAR23LMT %#018llx\n", bar_addr);
+
+ if (!ndev->bar4_split) {
+ bar_addr = addr->bar4_addr64 +
+ (b2b_bar == 4 ? ndev->b2b_off : 0);
+ iowrite64(bar_addr, mmio + XEON_SBAR45LMT_OFFSET);
+ bar_addr = ioread64(mmio + XEON_SBAR45LMT_OFFSET);
+ dev_dbg(&pdev->dev, "SBAR45LMT %#018llx\n", bar_addr);
+ } else {
+ bar_addr = addr->bar4_addr32 +
+ (b2b_bar == 4 ? ndev->b2b_off : 0);
+ iowrite32(bar_addr, mmio + XEON_SBAR4LMT_OFFSET);
+ bar_addr = ioread32(mmio + XEON_SBAR4LMT_OFFSET);
+ dev_dbg(&pdev->dev, "SBAR4LMT %#010llx\n", bar_addr);
+
+ bar_addr = addr->bar5_addr32 +
+ (b2b_bar == 5 ? ndev->b2b_off : 0);
+ iowrite32(bar_addr, mmio + XEON_SBAR5LMT_OFFSET);
+ bar_addr = ioread32(mmio + XEON_SBAR5LMT_OFFSET);
+ dev_dbg(&pdev->dev, "SBAR5LMT %#05llx\n", bar_addr);
+ }
+
+ /* zero incoming translation addrs */
+ iowrite64(0, mmio + XEON_SBAR23XLAT_OFFSET);
+
+ if (!ndev->bar4_split) {
+ iowrite64(0, mmio + XEON_SBAR45XLAT_OFFSET);
+ } else {
+ iowrite32(0, mmio + XEON_SBAR4XLAT_OFFSET);
+ iowrite32(0, mmio + XEON_SBAR5XLAT_OFFSET);
+ }
+
+ /* zero outgoing translation limits (whole bar size windows) */
+ iowrite64(0, mmio + XEON_PBAR23LMT_OFFSET);
+ if (!ndev->bar4_split) {
+ iowrite64(0, mmio + XEON_PBAR45LMT_OFFSET);
+ } else {
+ iowrite32(0, mmio + XEON_PBAR4LMT_OFFSET);
+ iowrite32(0, mmio + XEON_PBAR5LMT_OFFSET);
+ }
+
+ /* set outgoing translation offsets */
+ bar_addr = peer_addr->bar2_addr64;
+ iowrite64(bar_addr, mmio + XEON_PBAR23XLAT_OFFSET);
+ bar_addr = ioread64(mmio + XEON_PBAR23XLAT_OFFSET);
+ dev_dbg(&pdev->dev, "PBAR23XLAT %#018llx\n", bar_addr);
+
+ if (!ndev->bar4_split) {
+ bar_addr = peer_addr->bar4_addr64;
+ iowrite64(bar_addr, mmio + XEON_PBAR45XLAT_OFFSET);
+ bar_addr = ioread64(mmio + XEON_PBAR45XLAT_OFFSET);
+ dev_dbg(&pdev->dev, "PBAR45XLAT %#018llx\n", bar_addr);
+ } else {
+ bar_addr = peer_addr->bar4_addr32;
+ iowrite32(bar_addr, mmio + XEON_PBAR4XLAT_OFFSET);
+ bar_addr = ioread32(mmio + XEON_PBAR4XLAT_OFFSET);
+ dev_dbg(&pdev->dev, "PBAR4XLAT %#010llx\n", bar_addr);
+
+ bar_addr = peer_addr->bar5_addr32;
+ iowrite32(bar_addr, mmio + XEON_PBAR5XLAT_OFFSET);
+ bar_addr = ioread32(mmio + XEON_PBAR5XLAT_OFFSET);
+ dev_dbg(&pdev->dev, "PBAR5XLAT %#010llx\n", bar_addr);
+ }
+
+ /* set the translation offset for b2b registers */
+ if (b2b_bar == 0)
+ bar_addr = peer_addr->bar0_addr;
+ else if (b2b_bar == 2)
+ bar_addr = peer_addr->bar2_addr64;
+ else if (b2b_bar == 4 && !ndev->bar4_split)
+ bar_addr = peer_addr->bar4_addr64;
+ else if (b2b_bar == 4)
+ bar_addr = peer_addr->bar4_addr32;
+ else if (b2b_bar == 5)
+ bar_addr = peer_addr->bar5_addr32;
+ else
+ return -EIO;
+
+ /* B2B_XLAT_OFFSET is 64bit, but can only take 32bit writes */
+ dev_dbg(&pdev->dev, "B2BXLAT %#018llx\n", bar_addr);
+ iowrite32(bar_addr, mmio + XEON_B2B_XLAT_OFFSETL);
+ iowrite32(bar_addr >> 32, mmio + XEON_B2B_XLAT_OFFSETU);
+
+ if (b2b_bar) {
+ /* map peer ntb mmio config space registers */
+ ndev->peer_mmio = pci_iomap(pdev, b2b_bar,
+ XEON_B2B_MIN_SIZE);
+ if (!ndev->peer_mmio)
+ return -EIO;
+
+ ndev->peer_addr = pci_resource_start(pdev, b2b_bar);
+ }
+
+ return 0;
+}
+
+static int xeon_init_ntb(struct intel_ntb_dev *ndev)
+{
+ struct device *dev = &ndev->ntb.pdev->dev;
+ int rc;
+ u32 ntb_ctl;
+
+ if (ndev->bar4_split)
+ ndev->mw_count = HSX_SPLIT_BAR_MW_COUNT;
+ else
+ ndev->mw_count = XEON_MW_COUNT;
+
+ ndev->spad_count = XEON_SPAD_COUNT;
+ ndev->db_count = XEON_DB_COUNT;
+ ndev->db_link_mask = XEON_DB_LINK_BIT;
+
+ switch (ndev->ntb.topo) {
+ case NTB_TOPO_PRI:
+ if (ndev->hwerr_flags & NTB_HWERR_SDOORBELL_LOCKUP) {
+ dev_err(dev, "NTB Primary config disabled\n");
+ return -EINVAL;
+ }
+
+ /* enable link to allow secondary side device to appear */
+ ntb_ctl = ioread32(ndev->self_mmio + ndev->reg->ntb_ctl);
+ ntb_ctl &= ~NTB_CTL_DISABLE;
+ iowrite32(ntb_ctl, ndev->self_mmio + ndev->reg->ntb_ctl);
+
+ /* use half the spads for the peer */
+ ndev->spad_count >>= 1;
+ ndev->self_reg = &xeon_pri_reg;
+ ndev->peer_reg = &xeon_sec_reg;
+ ndev->xlat_reg = &xeon_sec_xlat;
+ break;
+
+ case NTB_TOPO_SEC:
+ if (ndev->hwerr_flags & NTB_HWERR_SDOORBELL_LOCKUP) {
+ dev_err(dev, "NTB Secondary config disabled\n");
+ return -EINVAL;
+ }
+ /* use half the spads for the peer */
+ ndev->spad_count >>= 1;
+ ndev->self_reg = &xeon_sec_reg;
+ ndev->peer_reg = &xeon_pri_reg;
+ ndev->xlat_reg = &xeon_pri_xlat;
+ break;
+
+ case NTB_TOPO_B2B_USD:
+ case NTB_TOPO_B2B_DSD:
+ ndev->self_reg = &xeon_pri_reg;
+ ndev->peer_reg = &xeon_b2b_reg;
+ ndev->xlat_reg = &xeon_sec_xlat;
+
+ if (ndev->hwerr_flags & NTB_HWERR_SDOORBELL_LOCKUP) {
+ ndev->peer_reg = &xeon_pri_reg;
+
+ if (b2b_mw_idx < 0)
+ ndev->b2b_idx = b2b_mw_idx + ndev->mw_count;
+ else
+ ndev->b2b_idx = b2b_mw_idx;
+
+ if (ndev->b2b_idx >= ndev->mw_count) {
+ dev_dbg(dev,
+ "b2b_mw_idx %d invalid for mw_count %u\n",
+ b2b_mw_idx, ndev->mw_count);
+ return -EINVAL;
+ }
+
+ dev_dbg(dev, "setting up b2b mw idx %d means %d\n",
+ b2b_mw_idx, ndev->b2b_idx);
+
+ } else if (ndev->hwerr_flags & NTB_HWERR_B2BDOORBELL_BIT14) {
+ dev_warn(dev, "Reduce doorbell count by 1\n");
+ ndev->db_count -= 1;
+ }
+
+ if (ndev->ntb.topo == NTB_TOPO_B2B_USD) {
+ rc = xeon_setup_b2b_mw(ndev,
+ &xeon_b2b_dsd_addr,
+ &xeon_b2b_usd_addr);
+ } else {
+ rc = xeon_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 + XEON_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;
+}
+
+static int xeon_init_dev(struct intel_ntb_dev *ndev)
+{
+ struct pci_dev *pdev;
+ u8 ppd;
+ int rc, mem;
+
+ pdev = ndev->ntb.pdev;
+
+ switch (pdev->device) {
+ /* There is a Xeon hardware errata related to writes to SDOORBELL or
+ * B2BDOORBELL in conjunction with inbound access to NTB MMIO Space,
+ * which may hang the system. To workaround this use the second memory
+ * window to access the interrupt and scratch pad registers on the
+ * remote system.
+ */
+ case PCI_DEVICE_ID_INTEL_NTB_SS_JSF:
+ case PCI_DEVICE_ID_INTEL_NTB_PS_JSF:
+ case PCI_DEVICE_ID_INTEL_NTB_B2B_JSF:
+ case PCI_DEVICE_ID_INTEL_NTB_SS_SNB:
+ case PCI_DEVICE_ID_INTEL_NTB_PS_SNB:
+ case PCI_DEVICE_ID_INTEL_NTB_B2B_SNB:
+ case PCI_DEVICE_ID_INTEL_NTB_SS_IVT:
+ case PCI_DEVICE_ID_INTEL_NTB_PS_IVT:
+ case PCI_DEVICE_ID_INTEL_NTB_B2B_IVT:
+ case PCI_DEVICE_ID_INTEL_NTB_SS_HSX:
+ case PCI_DEVICE_ID_INTEL_NTB_PS_HSX:
+ case PCI_DEVICE_ID_INTEL_NTB_B2B_HSX:
+ case PCI_DEVICE_ID_INTEL_NTB_SS_BDX:
+ case PCI_DEVICE_ID_INTEL_NTB_PS_BDX:
+ case PCI_DEVICE_ID_INTEL_NTB_B2B_BDX:
+ ndev->hwerr_flags |= NTB_HWERR_SDOORBELL_LOCKUP;
+ break;
+ }
+
+ switch (pdev->device) {
+ /* There is a hardware errata related to accessing any register in
+ * SB01BASE in the presence of bidirectional traffic crossing the NTB.
+ */
+ case PCI_DEVICE_ID_INTEL_NTB_SS_IVT:
+ case PCI_DEVICE_ID_INTEL_NTB_PS_IVT:
+ case PCI_DEVICE_ID_INTEL_NTB_B2B_IVT:
+ case PCI_DEVICE_ID_INTEL_NTB_SS_HSX:
+ case PCI_DEVICE_ID_INTEL_NTB_PS_HSX:
+ case PCI_DEVICE_ID_INTEL_NTB_B2B_HSX:
+ case PCI_DEVICE_ID_INTEL_NTB_SS_BDX:
+ case PCI_DEVICE_ID_INTEL_NTB_PS_BDX:
+ case PCI_DEVICE_ID_INTEL_NTB_B2B_BDX:
+ ndev->hwerr_flags |= NTB_HWERR_SB01BASE_LOCKUP;
+ break;
+ }
+
+ switch (pdev->device) {
+ /* HW Errata on bit 14 of b2bdoorbell register. Writes will not be
+ * mirrored to the remote system. Shrink the number of bits by one,
+ * since bit 14 is the last bit.
+ */
+ case PCI_DEVICE_ID_INTEL_NTB_SS_JSF:
+ case PCI_DEVICE_ID_INTEL_NTB_PS_JSF:
+ case PCI_DEVICE_ID_INTEL_NTB_B2B_JSF:
+ case PCI_DEVICE_ID_INTEL_NTB_SS_SNB:
+ case PCI_DEVICE_ID_INTEL_NTB_PS_SNB:
+ case PCI_DEVICE_ID_INTEL_NTB_B2B_SNB:
+ case PCI_DEVICE_ID_INTEL_NTB_SS_IVT:
+ case PCI_DEVICE_ID_INTEL_NTB_PS_IVT:
+ case PCI_DEVICE_ID_INTEL_NTB_B2B_IVT:
+ case PCI_DEVICE_ID_INTEL_NTB_SS_HSX:
+ case PCI_DEVICE_ID_INTEL_NTB_PS_HSX:
+ case PCI_DEVICE_ID_INTEL_NTB_B2B_HSX:
+ case PCI_DEVICE_ID_INTEL_NTB_SS_BDX:
+ case PCI_DEVICE_ID_INTEL_NTB_PS_BDX:
+ case PCI_DEVICE_ID_INTEL_NTB_B2B_BDX:
+ ndev->hwerr_flags |= NTB_HWERR_B2BDOORBELL_BIT14;
+ break;
+ }
+
+ ndev->reg = &xeon_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;
+
+ if (ndev->ntb.topo != NTB_TOPO_SEC) {
+ ndev->bar4_split = xeon_ppd_bar4_split(ndev, ppd);
+ dev_dbg(&pdev->dev, "ppd %#x bar4_split %d\n",
+ ppd, ndev->bar4_split);
+ } else {
+ /* This is a way for transparent BAR to figure out if we are
+ * doing split BAR or not. There is no way for the hw on the
+ * transparent side to know and set the PPD.
+ */
+ mem = pci_select_bars(pdev, IORESOURCE_MEM);
+ ndev->bar4_split = hweight32(mem) ==
+ HSX_SPLIT_BAR_MW_COUNT + 1;
+ dev_dbg(&pdev->dev, "mem %#x bar4_split %d\n",
+ mem, ndev->bar4_split);
+ }
+
+ rc = xeon_init_ntb(ndev);
+ if (rc)
+ return rc;
+
+ return xeon_init_isr(ndev);
+}
+
+static void xeon_deinit_dev(struct intel_ntb_dev *ndev)
+{
+ xeon_deinit_isr(ndev);
+}
+
+static int intel_ntb_init_pci(struct intel_ntb_dev *ndev, struct pci_dev *pdev)
+{
+ int rc;
+
+ pci_set_drvdata(pdev, ndev);
+
+ rc = pci_enable_device(pdev);
+ if (rc)
+ goto err_pci_enable;
+
+ rc = pci_request_regions(pdev, NTB_NAME);
+ if (rc)
+ goto err_pci_regions;
+
+ pci_set_master(pdev);
+
+ rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
+ if (rc) {
+ rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
+ if (rc)
+ goto err_dma_mask;
+ dev_warn(&pdev->dev, "Cannot DMA highmem\n");
+ }
+
+ rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
+ if (rc) {
+ rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
+ if (rc)
+ goto err_dma_mask;
+ dev_warn(&pdev->dev, "Cannot DMA consistent highmem\n");
+ }
+ rc = dma_coerce_mask_and_coherent(&ndev->ntb.dev,
+ dma_get_mask(&pdev->dev));
+ if (rc)
+ goto err_dma_mask;
+
+ ndev->self_mmio = pci_iomap(pdev, 0, 0);
+ if (!ndev->self_mmio) {
+ rc = -EIO;
+ goto err_mmio;
+ }
+ ndev->peer_mmio = ndev->self_mmio;
+ ndev->peer_addr = pci_resource_start(pdev, 0);
+
+ return 0;
+
+err_mmio:
+err_dma_mask:
+ pci_clear_master(pdev);
+ pci_release_regions(pdev);
+err_pci_regions:
+ pci_disable_device(pdev);
+err_pci_enable:
+ pci_set_drvdata(pdev, NULL);
+ return rc;
+}
+
+static void intel_ntb_deinit_pci(struct intel_ntb_dev *ndev)
+{
+ struct pci_dev *pdev = ndev->ntb.pdev;
+
+ if (ndev->peer_mmio && ndev->peer_mmio != ndev->self_mmio)
+ pci_iounmap(pdev, ndev->peer_mmio);
+ pci_iounmap(pdev, ndev->self_mmio);
+
+ pci_clear_master(pdev);
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+ pci_set_drvdata(pdev, NULL);
+}
+
+static inline void ndev_init_struct(struct intel_ntb_dev *ndev,
+ struct pci_dev *pdev)
+{
+ ndev->ntb.pdev = pdev;
+ ndev->ntb.topo = NTB_TOPO_NONE;
+ ndev->ntb.ops = &intel_ntb_ops;
+
+ ndev->b2b_off = 0;
+ ndev->b2b_idx = UINT_MAX;
+
+ ndev->bar4_split = 0;
+
+ ndev->mw_count = 0;
+ ndev->spad_count = 0;
+ ndev->db_count = 0;
+ ndev->db_vec_count = 0;
+ ndev->db_vec_shift = 0;
+
+ ndev->ntb_ctl = 0;
+ ndev->lnk_sta = 0;
+
+ ndev->db_valid_mask = 0;
+ ndev->db_link_mask = 0;
+ ndev->db_mask = 0;
+
+ spin_lock_init(&ndev->db_mask_lock);
+}
+
+static int intel_ntb_pci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *id)
+{
+ struct intel_ntb_dev *ndev;
+ int rc, node;
+
+ node = dev_to_node(&pdev->dev);
+
+ if (pdev_is_xeon(pdev)) {
+ ndev = kzalloc_node(sizeof(*ndev), GFP_KERNEL, node);
+ if (!ndev) {
+ rc = -ENOMEM;
+ goto err_ndev;
+ }
+
+ ndev_init_struct(ndev, pdev);
+
+ rc = intel_ntb_init_pci(ndev, pdev);
+ if (rc)
+ goto err_init_pci;
+
+ rc = xeon_init_dev(ndev);
+ if (rc)
+ goto err_init_dev;
+
+ } else if (pdev_is_skx_xeon(pdev)) {
+ ndev = kzalloc_node(sizeof(*ndev), GFP_KERNEL, node);
+ if (!ndev) {
+ rc = -ENOMEM;
+ goto err_ndev;
+ }
+
+ ndev_init_struct(ndev, pdev);
+ ndev->ntb.ops = &intel_ntb3_ops;
+
+ rc = intel_ntb_init_pci(ndev, pdev);
+ if (rc)
+ goto err_init_pci;
+
+ rc = skx_init_dev(ndev);
+ if (rc)
+ goto err_init_dev;
+
+ } else {
+ rc = -EINVAL;
+ goto err_ndev;
+ }
+
+ ndev_reset_unsafe_flags(ndev);
+
+ ndev->reg->poll_link(ndev);
+
+ ndev_init_debugfs(ndev);
+
+ rc = ntb_register_device(&ndev->ntb);
+ if (rc)
+ goto err_register;
+
+ dev_info(&pdev->dev, "NTB device registered.\n");
+
+ return 0;
+
+err_register:
+ ndev_deinit_debugfs(ndev);
+ if (pdev_is_xeon(pdev) || pdev_is_skx_xeon(pdev))
+ xeon_deinit_dev(ndev);
+err_init_dev:
+ intel_ntb_deinit_pci(ndev);
+err_init_pci:
+ kfree(ndev);
+err_ndev:
+ return rc;
+}
+
+static void intel_ntb_pci_remove(struct pci_dev *pdev)
+{
+ struct intel_ntb_dev *ndev = pci_get_drvdata(pdev);
+
+ ntb_unregister_device(&ndev->ntb);
+ ndev_deinit_debugfs(ndev);
+ if (pdev_is_xeon(pdev) || pdev_is_skx_xeon(pdev))
+ xeon_deinit_dev(ndev);
+ intel_ntb_deinit_pci(ndev);
+ kfree(ndev);
+}
+
+static const struct intel_ntb_reg xeon_reg = {
+ .poll_link = xeon_poll_link,
+ .link_is_up = xeon_link_is_up,
+ .db_ioread = xeon_db_ioread,
+ .db_iowrite = xeon_db_iowrite,
+ .db_size = sizeof(u32),
+ .ntb_ctl = XEON_NTBCNTL_OFFSET,
+ .mw_bar = {2, 4, 5},
+};
+
+static const struct intel_ntb_alt_reg xeon_pri_reg = {
+ .db_bell = XEON_PDOORBELL_OFFSET,
+ .db_mask = XEON_PDBMSK_OFFSET,
+ .spad = XEON_SPAD_OFFSET,
+};
+
+static const struct intel_ntb_alt_reg xeon_sec_reg = {
+ .db_bell = XEON_SDOORBELL_OFFSET,
+ .db_mask = XEON_SDBMSK_OFFSET,
+ /* second half of the scratchpads */
+ .spad = XEON_SPAD_OFFSET + (XEON_SPAD_COUNT << 1),
+};
+
+static const struct intel_ntb_alt_reg xeon_b2b_reg = {
+ .db_bell = XEON_B2B_DOORBELL_OFFSET,
+ .spad = XEON_B2B_SPAD_OFFSET,
+};
+
+static const struct intel_ntb_xlat_reg xeon_pri_xlat = {
+ /* Note: no primary .bar0_base visible to the secondary side.
+ *
+ * The secondary side cannot get the base address stored in primary
+ * bars. The base address is necessary to set the limit register to
+ * any value other than zero, or unlimited.
+ *
+ * WITHOUT THE BASE ADDRESS, THE SECONDARY SIDE CANNOT DISABLE the
+ * window by setting the limit equal to base, nor can it limit the size
+ * of the memory window by setting the limit to base + size.
+ */
+ .bar2_limit = XEON_PBAR23LMT_OFFSET,
+ .bar2_xlat = XEON_PBAR23XLAT_OFFSET,
+};
+
+static const struct intel_ntb_xlat_reg xeon_sec_xlat = {
+ .bar0_base = XEON_SBAR0BASE_OFFSET,
+ .bar2_limit = XEON_SBAR23LMT_OFFSET,
+ .bar2_xlat = XEON_SBAR23XLAT_OFFSET,
+};
+
+struct intel_b2b_addr xeon_b2b_usd_addr = {
+ .bar2_addr64 = XEON_B2B_BAR2_ADDR64,
+ .bar4_addr64 = XEON_B2B_BAR4_ADDR64,
+ .bar4_addr32 = XEON_B2B_BAR4_ADDR32,
+ .bar5_addr32 = XEON_B2B_BAR5_ADDR32,
+};
+
+struct intel_b2b_addr xeon_b2b_dsd_addr = {
+ .bar2_addr64 = XEON_B2B_BAR2_ADDR64,
+ .bar4_addr64 = XEON_B2B_BAR4_ADDR64,
+ .bar4_addr32 = XEON_B2B_BAR4_ADDR32,
+ .bar5_addr32 = XEON_B2B_BAR5_ADDR32,
+};
+
+/* operations for primary side of local ntb */
+static const struct ntb_dev_ops intel_ntb_ops = {
+ .mw_count = intel_ntb_mw_count,
+ .mw_get_align = intel_ntb_mw_get_align,
+ .mw_set_trans = intel_ntb_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_ntb_link_enable,
+ .link_disable = intel_ntb_link_disable,
+ .db_is_unsafe = intel_ntb_db_is_unsafe,
+ .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_ntb_db_read,
+ .db_clear = intel_ntb_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_ntb_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,
+};
+
+static const struct file_operations intel_ntb_debugfs_info = {
+ .owner = THIS_MODULE,
+ .open = simple_open,
+ .read = ndev_debugfs_read,
+};
+
+static const struct pci_device_id intel_ntb_pci_tbl[] = {
+ {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_B2B_JSF)},
+ {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_B2B_SNB)},
+ {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_B2B_IVT)},
+ {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_B2B_HSX)},
+ {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_B2B_BDX)},
+ {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_PS_JSF)},
+ {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_PS_SNB)},
+ {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_PS_IVT)},
+ {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_PS_HSX)},
+ {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_PS_BDX)},
+ {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_SS_JSF)},
+ {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_SS_SNB)},
+ {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_SS_IVT)},
+ {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_SS_HSX)},
+ {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_SS_BDX)},
+ {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_B2B_SKX)},
+ {0}
+};
+MODULE_DEVICE_TABLE(pci, intel_ntb_pci_tbl);
+
+static struct pci_driver intel_ntb_pci_driver = {
+ .name = KBUILD_MODNAME,
+ .id_table = intel_ntb_pci_tbl,
+ .probe = intel_ntb_pci_probe,
+ .remove = intel_ntb_pci_remove,
+};
+
+static int __init intel_ntb_pci_driver_init(void)
+{
+ pr_info("%s %s\n", NTB_DESC, NTB_VER);
+
+ if (debugfs_initialized())
+ debugfs_dir = debugfs_create_dir(KBUILD_MODNAME, NULL);
+
+ return pci_register_driver(&intel_ntb_pci_driver);
+}
+module_init(intel_ntb_pci_driver_init);
+
+static void __exit intel_ntb_pci_driver_exit(void)
+{
+ pci_unregister_driver(&intel_ntb_pci_driver);
+
+ debugfs_remove_recursive(debugfs_dir);
+}
+module_exit(intel_ntb_pci_driver_exit);
#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 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
--- /dev/null
+/*
+ * 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 NTB Linux driver
+ *
+ * Contact Information:
+ * Jon Mason <jon.mason@intel.com>
+ */
+
+#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 const struct intel_ntb_reg skx_reg = {
+ .poll_link = skx_poll_link,
+ .link_is_up = xeon_link_is_up,
+ .db_ioread = skx_db_ioread,
+ .db_iowrite = skx_db_iowrite,
+ .db_size = sizeof(u32),
+ .ntb_ctl = SKX_NTBCNTL_OFFSET,
+ .mw_bar = {2, 4},
+};
+
+static const struct intel_ntb_alt_reg skx_pri_reg = {
+ .db_bell = SKX_EM_DOORBELL_OFFSET,
+ .db_clear = SKX_IM_INT_STATUS_OFFSET,
+ .db_mask = SKX_IM_INT_DISABLE_OFFSET,
+ .spad = SKX_IM_SPAD_OFFSET,
+};
+
+static const struct intel_ntb_alt_reg skx_b2b_reg = {
+ .db_bell = SKX_IM_DOORBELL_OFFSET,
+ .db_clear = SKX_EM_INT_STATUS_OFFSET,
+ .db_mask = SKX_EM_INT_DISABLE_OFFSET,
+ .spad = SKX_B2B_SPAD_OFFSET,
+};
+
+static const struct intel_ntb_xlat_reg skx_sec_xlat = {
+/* .bar0_base = SKX_EMBAR0_OFFSET, */
+ .bar2_limit = SKX_IMBAR1XLMT_OFFSET,
+ .bar2_xlat = SKX_IMBAR1XBASE_OFFSET,
+};
+
+int skx_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,
+ SKX_LINK_STATUS_OFFSET, ®_val);
+ if (rc)
+ return 0;
+
+ if (reg_val == ndev->lnk_sta)
+ return 0;
+
+ ndev->lnk_sta = reg_val;
+
+ return 1;
+}
+
+static int skx_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 < SKX_DB_MSIX_VECTOR_COUNT; i++)
+ iowrite8(i, ndev->self_mmio + SKX_INTVEC_OFFSET + i);
+
+ /* move link status down one as workaround */
+ if (ndev->hwerr_flags & NTB_HWERR_MSIX_VECTOR32_BAD) {
+ iowrite8(SKX_DB_MSIX_VECTOR_COUNT - 2,
+ ndev->self_mmio + SKX_INTVEC_OFFSET +
+ (SKX_DB_MSIX_VECTOR_COUNT - 1));
+ }
+
+ return ndev_init_isr(ndev, SKX_DB_MSIX_VECTOR_COUNT,
+ SKX_DB_MSIX_VECTOR_COUNT,
+ SKX_DB_MSIX_VECTOR_SHIFT,
+ SKX_DB_TOTAL_SHIFT);
+}
+
+static int skx_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 + SKX_IMBAR1XLMT_OFFSET);
+ bar_addr = ioread64(mmio + SKX_IMBAR1XLMT_OFFSET);
+ dev_dbg(&pdev->dev, "IMBAR1XLMT %#018llx\n", bar_addr);
+
+ bar_addr = addr->bar4_addr64;
+ iowrite64(bar_addr, mmio + SKX_IMBAR2XLMT_OFFSET);
+ bar_addr = ioread64(mmio + SKX_IMBAR2XLMT_OFFSET);
+ dev_dbg(&pdev->dev, "IMBAR2XLMT %#018llx\n", bar_addr);
+
+ /* zero incoming translation addrs */
+ iowrite64(0, mmio + SKX_IMBAR1XBASE_OFFSET);
+ iowrite64(0, mmio + SKX_IMBAR2XBASE_OFFSET);
+
+ ndev->peer_mmio = ndev->self_mmio;
+
+ return 0;
+}
+
+static int skx_init_ntb(struct intel_ntb_dev *ndev)
+{
+ int rc;
+
+
+ ndev->mw_count = XEON_MW_COUNT;
+ ndev->spad_count = SKX_SPAD_COUNT;
+ ndev->db_count = SKX_DB_COUNT;
+ ndev->db_link_mask = SKX_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 = &skx_pri_reg;
+ ndev->peer_reg = &skx_b2b_reg;
+ ndev->xlat_reg = &skx_sec_xlat;
+
+ if (ndev->ntb.topo == NTB_TOPO_B2B_USD) {
+ rc = skx_setup_b2b_mw(ndev,
+ &xeon_b2b_dsd_addr,
+ &xeon_b2b_usd_addr);
+ } else {
+ rc = skx_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 + SKX_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 skx_init_dev(struct intel_ntb_dev *ndev)
+{
+ struct pci_dev *pdev;
+ u8 ppd;
+ int rc;
+
+ pdev = ndev->ntb.pdev;
+
+ ndev->reg = &skx_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 = skx_init_ntb(ndev);
+ if (rc)
+ return rc;
+
+ return skx_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 + SKX_IMBAR1XBASE_OFFSET);
+ off += scnprintf(buf + off, buf_size - off,
+ "IMBAR1XBASE -\t\t%#018llx\n", u.v64);
+
+ u.v64 = ioread64(mmio + SKX_IMBAR2XBASE_OFFSET);
+ off += scnprintf(buf + off, buf_size - off,
+ "IMBAR2XBASE -\t\t%#018llx\n", u.v64);
+
+ u.v64 = ioread64(mmio + SKX_IMBAR1XLMT_OFFSET);
+ off += scnprintf(buf + off, buf_size - off,
+ "IMBAR1XLMT -\t\t\t%#018llx\n", u.v64);
+
+ u.v64 = ioread64(mmio + SKX_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 + SKX_EMBAR1XBASE_OFFSET);
+ off += scnprintf(buf + off, buf_size - off,
+ "EMBAR1XBASE -\t\t%#018llx\n", u.v64);
+
+ u.v64 = ioread64(mmio + SKX_EMBAR2XBASE_OFFSET);
+ off += scnprintf(buf + off, buf_size - off,
+ "EMBAR2XBASE -\t\t%#018llx\n", u.v64);
+
+ u.v64 = ioread64(mmio + SKX_EMBAR1XLMT_OFFSET);
+ off += scnprintf(buf + off, buf_size - off,
+ "EMBAR1XLMT -\t\t%#018llx\n", u.v64);
+
+ u.v64 = ioread64(mmio + SKX_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 + SKX_EMBAR0_OFFSET);
+ off += scnprintf(buf + off, buf_size - off,
+ "EMBAR0 -\t\t%#018llx\n", u.v64);
+
+ u.v64 = ioread64(mmio + SKX_EMBAR1_OFFSET);
+ off += scnprintf(buf + off, buf_size - off,
+ "EMBAR1 -\t\t%#018llx\n", u.v64);
+
+ u.v64 = ioread64(mmio + SKX_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 + SKX_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,
+ SKX_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,
+ SKX_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,
+ SKX_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,
+ SKX_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 + SKX_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,
+};
+
#ifndef _NTB_INTEL_GEN3_H_
#define _NTB_INTEL_GEN3_H_
+#include "ntb_hw_intel.h"
+
/* Intel Skylake Xeon hardware */
#define SKX_IMBAR1SZ_OFFSET 0x00d0
#define SKX_IMBAR2SZ_OFFSET 0x00d1
#define SKX_DB_TOTAL_SHIFT 33
#define SKX_SPAD_COUNT 16
+static inline u64 skx_db_ioread(void __iomem *mmio)
+{
+ return ioread64(mmio);
+}
+
+static inline void skx_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 skx_init_dev(struct intel_ntb_dev *ndev);
+int skx_poll_link(struct intel_ntb_dev *ndev);
+
+extern const struct ntb_dev_ops intel_ntb3_ops;
+
#endif
+++ /dev/null
-/*
- * 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 Intel Corporation. All rights reserved.
- * Copyright (C) 2015 EMC Corporation. All Rights Reserved.
- * Copyright (C) 2016 T-Platforms. 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 Intel Corporation. All rights reserved.
- * Copyright (C) 2015 EMC Corporation. All Rights Reserved.
- * Copyright (C) 2016 T-Platforms. 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 NTB Linux driver
- *
- * Contact Information:
- * Jon Mason <jon.mason@intel.com>
- */
-
-#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_gen1.h"
-#include "ntb_hw_gen3.h"
-#include "ntb_hw_intel.h"
-
-#define NTB_NAME "ntb_hw_intel"
-#define NTB_DESC "Intel(R) PCI-E Non-Transparent Bridge Driver"
-#define NTB_VER "2.0"
-
-MODULE_DESCRIPTION(NTB_DESC);
-MODULE_VERSION(NTB_VER);
-MODULE_LICENSE("Dual BSD/GPL");
-MODULE_AUTHOR("Intel Corporation");
-
-#define bar0_off(base, bar) ((base) + ((bar) << 2))
-#define bar2_off(base, bar) bar0_off(base, (bar) - 2)
-
-static const struct intel_ntb_reg xeon_reg;
-static const struct intel_ntb_alt_reg xeon_pri_reg;
-static const struct intel_ntb_alt_reg xeon_sec_reg;
-static const struct intel_ntb_alt_reg xeon_b2b_reg;
-static const struct intel_ntb_xlat_reg xeon_pri_xlat;
-static const struct intel_ntb_xlat_reg xeon_sec_xlat;
-static struct intel_b2b_addr xeon_b2b_usd_addr;
-static struct intel_b2b_addr xeon_b2b_dsd_addr;
-static const struct intel_ntb_reg skx_reg;
-static const struct intel_ntb_alt_reg skx_pri_reg;
-static const struct intel_ntb_alt_reg skx_b2b_reg;
-static const struct intel_ntb_xlat_reg skx_sec_xlat;
-static const struct ntb_dev_ops intel_ntb_ops;
-static const struct ntb_dev_ops intel_ntb3_ops;
-
-static const struct file_operations intel_ntb_debugfs_info;
-static struct dentry *debugfs_dir;
-
-static int b2b_mw_idx = -1;
-module_param(b2b_mw_idx, int, 0644);
-MODULE_PARM_DESC(b2b_mw_idx, "Use this mw idx to access the peer ntb. A "
- "value of zero or positive starts from first mw idx, and a "
- "negative value starts from last mw idx. Both sides MUST "
- "set the same value here!");
-
-static unsigned int b2b_mw_share;
-module_param(b2b_mw_share, uint, 0644);
-MODULE_PARM_DESC(b2b_mw_share, "If the b2b mw is large enough, configure the "
- "ntb so that the peer ntb only occupies the first half of "
- "the mw, so the second half can still be used as a mw. Both "
- "sides MUST set the same value here!");
-
-module_param_named(xeon_b2b_usd_bar2_addr64,
- xeon_b2b_usd_addr.bar2_addr64, ullong, 0644);
-MODULE_PARM_DESC(xeon_b2b_usd_bar2_addr64,
- "XEON B2B USD BAR 2 64-bit address");
-
-module_param_named(xeon_b2b_usd_bar4_addr64,
- xeon_b2b_usd_addr.bar4_addr64, ullong, 0644);
-MODULE_PARM_DESC(xeon_b2b_usd_bar4_addr64,
- "XEON B2B USD BAR 4 64-bit address");
-
-module_param_named(xeon_b2b_usd_bar4_addr32,
- xeon_b2b_usd_addr.bar4_addr32, ullong, 0644);
-MODULE_PARM_DESC(xeon_b2b_usd_bar4_addr32,
- "XEON B2B USD split-BAR 4 32-bit address");
-
-module_param_named(xeon_b2b_usd_bar5_addr32,
- xeon_b2b_usd_addr.bar5_addr32, ullong, 0644);
-MODULE_PARM_DESC(xeon_b2b_usd_bar5_addr32,
- "XEON B2B USD split-BAR 5 32-bit address");
-
-module_param_named(xeon_b2b_dsd_bar2_addr64,
- xeon_b2b_dsd_addr.bar2_addr64, ullong, 0644);
-MODULE_PARM_DESC(xeon_b2b_dsd_bar2_addr64,
- "XEON B2B DSD BAR 2 64-bit address");
-
-module_param_named(xeon_b2b_dsd_bar4_addr64,
- xeon_b2b_dsd_addr.bar4_addr64, ullong, 0644);
-MODULE_PARM_DESC(xeon_b2b_dsd_bar4_addr64,
- "XEON B2B DSD BAR 4 64-bit address");
-
-module_param_named(xeon_b2b_dsd_bar4_addr32,
- xeon_b2b_dsd_addr.bar4_addr32, ullong, 0644);
-MODULE_PARM_DESC(xeon_b2b_dsd_bar4_addr32,
- "XEON B2B DSD split-BAR 4 32-bit address");
-
-module_param_named(xeon_b2b_dsd_bar5_addr32,
- xeon_b2b_dsd_addr.bar5_addr32, ullong, 0644);
-MODULE_PARM_DESC(xeon_b2b_dsd_bar5_addr32,
- "XEON B2B DSD split-BAR 5 32-bit address");
-
-static inline enum ntb_topo xeon_ppd_topo(struct intel_ntb_dev *ndev, u8 ppd);
-static int xeon_init_isr(struct intel_ntb_dev *ndev);
-
-#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
-
-static inline int pdev_is_xeon(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_skx_xeon(struct pci_dev *pdev)
-{
- if (pdev->device == PCI_DEVICE_ID_INTEL_NTB_B2B_SKX)
- return 1;
-
- return 0;
-}
-
-static inline void ndev_reset_unsafe_flags(struct intel_ntb_dev *ndev)
-{
- ndev->unsafe_flags = 0;
- ndev->unsafe_flags_ignore = 0;
-
- /* Only B2B has a workaround to avoid SDOORBELL */
- if (ndev->hwerr_flags & NTB_HWERR_SDOORBELL_LOCKUP)
- if (!ntb_topo_is_b2b(ndev->ntb.topo))
- ndev->unsafe_flags |= NTB_UNSAFE_DB;
-
- /* No low level workaround to avoid SB01BASE */
- if (ndev->hwerr_flags & NTB_HWERR_SB01BASE_LOCKUP) {
- ndev->unsafe_flags |= NTB_UNSAFE_DB;
- ndev->unsafe_flags |= NTB_UNSAFE_SPAD;
- }
-}
-
-static inline int ndev_is_unsafe(struct intel_ntb_dev *ndev,
- unsigned long flag)
-{
- return !!(flag & ndev->unsafe_flags & ~ndev->unsafe_flags_ignore);
-}
-
-static inline int ndev_ignore_unsafe(struct intel_ntb_dev *ndev,
- unsigned long flag)
-{
- flag &= ndev->unsafe_flags;
- ndev->unsafe_flags_ignore |= flag;
-
- return !!flag;
-}
-
-static int ndev_mw_to_bar(struct intel_ntb_dev *ndev, int idx)
-{
- if (idx < 0 || idx >= ndev->mw_count)
- return -EINVAL;
- return ndev->reg->mw_bar[idx];
-}
-
-static inline int ndev_db_addr(struct intel_ntb_dev *ndev,
- phys_addr_t *db_addr, resource_size_t *db_size,
- phys_addr_t reg_addr, unsigned long reg)
-{
- if (ndev_is_unsafe(ndev, NTB_UNSAFE_DB))
- pr_warn_once("%s: NTB unsafe doorbell access", __func__);
-
- if (db_addr) {
- *db_addr = reg_addr + reg;
- dev_dbg(&ndev->ntb.pdev->dev, "Peer db addr %llx\n", *db_addr);
- }
-
- if (db_size) {
- *db_size = ndev->reg->db_size;
- dev_dbg(&ndev->ntb.pdev->dev, "Peer db size %llx\n", *db_size);
- }
-
- return 0;
-}
-
-static inline u64 ndev_db_read(struct intel_ntb_dev *ndev,
- void __iomem *mmio)
-{
- if (ndev_is_unsafe(ndev, NTB_UNSAFE_DB))
- pr_warn_once("%s: NTB unsafe doorbell access", __func__);
-
- return ndev->reg->db_ioread(mmio);
-}
-
-static inline int ndev_db_write(struct intel_ntb_dev *ndev, u64 db_bits,
- void __iomem *mmio)
-{
- if (ndev_is_unsafe(ndev, NTB_UNSAFE_DB))
- pr_warn_once("%s: NTB unsafe doorbell access", __func__);
-
- if (db_bits & ~ndev->db_valid_mask)
- return -EINVAL;
-
- ndev->reg->db_iowrite(db_bits, mmio);
-
- return 0;
-}
-
-static inline int ndev_db_set_mask(struct intel_ntb_dev *ndev, u64 db_bits,
- void __iomem *mmio)
-{
- unsigned long irqflags;
-
- if (ndev_is_unsafe(ndev, NTB_UNSAFE_DB))
- pr_warn_once("%s: NTB unsafe doorbell access", __func__);
-
- if (db_bits & ~ndev->db_valid_mask)
- return -EINVAL;
-
- spin_lock_irqsave(&ndev->db_mask_lock, irqflags);
- {
- ndev->db_mask |= db_bits;
- ndev->reg->db_iowrite(ndev->db_mask, mmio);
- }
- spin_unlock_irqrestore(&ndev->db_mask_lock, irqflags);
-
- return 0;
-}
-
-static inline int ndev_db_clear_mask(struct intel_ntb_dev *ndev, u64 db_bits,
- void __iomem *mmio)
-{
- unsigned long irqflags;
-
- if (ndev_is_unsafe(ndev, NTB_UNSAFE_DB))
- pr_warn_once("%s: NTB unsafe doorbell access", __func__);
-
- if (db_bits & ~ndev->db_valid_mask)
- return -EINVAL;
-
- spin_lock_irqsave(&ndev->db_mask_lock, irqflags);
- {
- ndev->db_mask &= ~db_bits;
- ndev->reg->db_iowrite(ndev->db_mask, mmio);
- }
- spin_unlock_irqrestore(&ndev->db_mask_lock, irqflags);
-
- return 0;
-}
-
-static inline int ndev_vec_mask(struct intel_ntb_dev *ndev, int db_vector)
-{
- u64 shift, mask;
-
- shift = ndev->db_vec_shift;
- mask = BIT_ULL(shift) - 1;
-
- return mask << (shift * db_vector);
-}
-
-static inline int ndev_spad_addr(struct intel_ntb_dev *ndev, int idx,
- phys_addr_t *spad_addr, phys_addr_t reg_addr,
- unsigned long reg)
-{
- if (ndev_is_unsafe(ndev, NTB_UNSAFE_SPAD))
- pr_warn_once("%s: NTB unsafe scratchpad access", __func__);
-
- if (idx < 0 || idx >= ndev->spad_count)
- return -EINVAL;
-
- if (spad_addr) {
- *spad_addr = reg_addr + reg + (idx << 2);
- dev_dbg(&ndev->ntb.pdev->dev, "Peer spad addr %llx\n",
- *spad_addr);
- }
-
- return 0;
-}
-
-static inline u32 ndev_spad_read(struct intel_ntb_dev *ndev, int idx,
- void __iomem *mmio)
-{
- if (ndev_is_unsafe(ndev, NTB_UNSAFE_SPAD))
- pr_warn_once("%s: NTB unsafe scratchpad access", __func__);
-
- if (idx < 0 || idx >= ndev->spad_count)
- return 0;
-
- return ioread32(mmio + (idx << 2));
-}
-
-static inline int ndev_spad_write(struct intel_ntb_dev *ndev, int idx, u32 val,
- void __iomem *mmio)
-{
- if (ndev_is_unsafe(ndev, NTB_UNSAFE_SPAD))
- pr_warn_once("%s: NTB unsafe scratchpad access", __func__);
-
- if (idx < 0 || idx >= ndev->spad_count)
- return -EINVAL;
-
- iowrite32(val, mmio + (idx << 2));
-
- return 0;
-}
-
-static irqreturn_t ndev_interrupt(struct intel_ntb_dev *ndev, int vec)
-{
- u64 vec_mask;
-
- vec_mask = ndev_vec_mask(ndev, vec);
-
- if ((ndev->hwerr_flags & NTB_HWERR_MSIX_VECTOR32_BAD) && (vec == 31))
- vec_mask |= ndev->db_link_mask;
-
- dev_dbg(&ndev->ntb.pdev->dev, "vec %d vec_mask %llx\n", vec, vec_mask);
-
- ndev->last_ts = jiffies;
-
- if (vec_mask & ndev->db_link_mask) {
- if (ndev->reg->poll_link(ndev))
- ntb_link_event(&ndev->ntb);
- }
-
- if (vec_mask & ndev->db_valid_mask)
- ntb_db_event(&ndev->ntb, vec);
-
- return IRQ_HANDLED;
-}
-
-static irqreturn_t ndev_vec_isr(int irq, void *dev)
-{
- struct intel_ntb_vec *nvec = dev;
-
- dev_dbg(&nvec->ndev->ntb.pdev->dev, "irq: %d nvec->num: %d\n",
- irq, nvec->num);
-
- return ndev_interrupt(nvec->ndev, nvec->num);
-}
-
-static irqreturn_t ndev_irq_isr(int irq, void *dev)
-{
- struct intel_ntb_dev *ndev = dev;
-
- return ndev_interrupt(ndev, irq - ndev->ntb.pdev->irq);
-}
-
-static int ndev_init_isr(struct intel_ntb_dev *ndev,
- int msix_min, int msix_max,
- int msix_shift, int total_shift)
-{
- struct pci_dev *pdev;
- int rc, i, msix_count, node;
-
- pdev = ndev->ntb.pdev;
-
- node = dev_to_node(&pdev->dev);
-
- /* Mask all doorbell interrupts */
- ndev->db_mask = ndev->db_valid_mask;
- ndev->reg->db_iowrite(ndev->db_mask,
- ndev->self_mmio +
- ndev->self_reg->db_mask);
-
- /* Try to set up msix irq */
-
- ndev->vec = kzalloc_node(msix_max * sizeof(*ndev->vec),
- GFP_KERNEL, node);
- if (!ndev->vec)
- goto err_msix_vec_alloc;
-
- ndev->msix = kzalloc_node(msix_max * sizeof(*ndev->msix),
- GFP_KERNEL, node);
- if (!ndev->msix)
- goto err_msix_alloc;
-
- for (i = 0; i < msix_max; ++i)
- ndev->msix[i].entry = i;
-
- msix_count = pci_enable_msix_range(pdev, ndev->msix,
- msix_min, msix_max);
- if (msix_count < 0)
- goto err_msix_enable;
-
- for (i = 0; i < msix_count; ++i) {
- ndev->vec[i].ndev = ndev;
- ndev->vec[i].num = i;
- rc = request_irq(ndev->msix[i].vector, ndev_vec_isr, 0,
- "ndev_vec_isr", &ndev->vec[i]);
- if (rc)
- goto err_msix_request;
- }
-
- dev_dbg(&pdev->dev, "Using %d msix interrupts\n", msix_count);
- ndev->db_vec_count = msix_count;
- ndev->db_vec_shift = msix_shift;
- return 0;
-
-err_msix_request:
- while (i-- > 0)
- free_irq(ndev->msix[i].vector, &ndev->vec[i]);
- pci_disable_msix(pdev);
-err_msix_enable:
- kfree(ndev->msix);
-err_msix_alloc:
- kfree(ndev->vec);
-err_msix_vec_alloc:
- ndev->msix = NULL;
- ndev->vec = NULL;
-
- /* Try to set up msi irq */
-
- rc = pci_enable_msi(pdev);
- if (rc)
- goto err_msi_enable;
-
- rc = request_irq(pdev->irq, ndev_irq_isr, 0,
- "ndev_irq_isr", ndev);
- if (rc)
- goto err_msi_request;
-
- dev_dbg(&pdev->dev, "Using msi interrupts\n");
- ndev->db_vec_count = 1;
- ndev->db_vec_shift = total_shift;
- return 0;
-
-err_msi_request:
- pci_disable_msi(pdev);
-err_msi_enable:
-
- /* Try to set up intx irq */
-
- pci_intx(pdev, 1);
-
- rc = request_irq(pdev->irq, ndev_irq_isr, IRQF_SHARED,
- "ndev_irq_isr", ndev);
- if (rc)
- goto err_intx_request;
-
- dev_dbg(&pdev->dev, "Using intx interrupts\n");
- ndev->db_vec_count = 1;
- ndev->db_vec_shift = total_shift;
- return 0;
-
-err_intx_request:
- return rc;
-}
-
-static void ndev_deinit_isr(struct intel_ntb_dev *ndev)
-{
- struct pci_dev *pdev;
- int i;
-
- pdev = ndev->ntb.pdev;
-
- /* Mask all doorbell interrupts */
- ndev->db_mask = ndev->db_valid_mask;
- ndev->reg->db_iowrite(ndev->db_mask,
- ndev->self_mmio +
- ndev->self_reg->db_mask);
-
- if (ndev->msix) {
- i = ndev->db_vec_count;
- while (i--)
- free_irq(ndev->msix[i].vector, &ndev->vec[i]);
- pci_disable_msix(pdev);
- kfree(ndev->msix);
- kfree(ndev->vec);
- } else {
- free_irq(pdev->irq, ndev);
- if (pci_dev_msi_enabled(pdev))
- pci_disable_msi(pdev);
- }
-}
-
-static 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 + SKX_IMBAR1XBASE_OFFSET);
- off += scnprintf(buf + off, buf_size - off,
- "IMBAR1XBASE -\t\t%#018llx\n", u.v64);
-
- u.v64 = ioread64(mmio + SKX_IMBAR2XBASE_OFFSET);
- off += scnprintf(buf + off, buf_size - off,
- "IMBAR2XBASE -\t\t%#018llx\n", u.v64);
-
- u.v64 = ioread64(mmio + SKX_IMBAR1XLMT_OFFSET);
- off += scnprintf(buf + off, buf_size - off,
- "IMBAR1XLMT -\t\t\t%#018llx\n", u.v64);
-
- u.v64 = ioread64(mmio + SKX_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 + SKX_EMBAR1XBASE_OFFSET);
- off += scnprintf(buf + off, buf_size - off,
- "EMBAR1XBASE -\t\t%#018llx\n", u.v64);
-
- u.v64 = ioread64(mmio + SKX_EMBAR2XBASE_OFFSET);
- off += scnprintf(buf + off, buf_size - off,
- "EMBAR2XBASE -\t\t%#018llx\n", u.v64);
-
- u.v64 = ioread64(mmio + SKX_EMBAR1XLMT_OFFSET);
- off += scnprintf(buf + off, buf_size - off,
- "EMBAR1XLMT -\t\t%#018llx\n", u.v64);
-
- u.v64 = ioread64(mmio + SKX_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 + SKX_EMBAR0_OFFSET);
- off += scnprintf(buf + off, buf_size - off,
- "EMBAR0 -\t\t%#018llx\n", u.v64);
-
- u.v64 = ioread64(mmio + SKX_EMBAR1_OFFSET);
- off += scnprintf(buf + off, buf_size - off,
- "EMBAR1 -\t\t%#018llx\n", u.v64);
-
- u.v64 = ioread64(mmio + SKX_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 + SKX_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,
- SKX_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,
- SKX_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,
- SKX_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,
- SKX_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 ssize_t ndev_ntb_debugfs_read(struct file *filp, char __user *ubuf,
- size_t count, loff_t *offp)
-{
- struct intel_ntb_dev *ndev;
- struct pci_dev *pdev;
- void __iomem *mmio;
- char *buf;
- size_t buf_size;
- ssize_t ret, off;
- union { u64 v64; u32 v32; u16 v16; u8 v8; } u;
-
- ndev = filp->private_data;
- pdev = ndev->ntb.pdev;
- 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));
-
- if (ndev->b2b_idx != UINT_MAX) {
- off += scnprintf(buf + off, buf_size - off,
- "B2B MW Idx -\t\t%u\n", ndev->b2b_idx);
- off += scnprintf(buf + off, buf_size - off,
- "B2B Offset -\t\t%#lx\n", ndev->b2b_off);
- }
-
- off += scnprintf(buf + off, buf_size - off,
- "BAR4 Split -\t\t%s\n",
- ndev->bar4_split ? "yes" : "no");
-
- 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 Window Size:\n");
-
- pci_read_config_byte(pdev, XEON_PBAR23SZ_OFFSET, &u.v8);
- off += scnprintf(buf + off, buf_size - off,
- "PBAR23SZ %hhu\n", u.v8);
- if (!ndev->bar4_split) {
- pci_read_config_byte(pdev, XEON_PBAR45SZ_OFFSET, &u.v8);
- off += scnprintf(buf + off, buf_size - off,
- "PBAR45SZ %hhu\n", u.v8);
- } else {
- pci_read_config_byte(pdev, XEON_PBAR4SZ_OFFSET, &u.v8);
- off += scnprintf(buf + off, buf_size - off,
- "PBAR4SZ %hhu\n", u.v8);
- pci_read_config_byte(pdev, XEON_PBAR5SZ_OFFSET, &u.v8);
- off += scnprintf(buf + off, buf_size - off,
- "PBAR5SZ %hhu\n", u.v8);
- }
-
- pci_read_config_byte(pdev, XEON_SBAR23SZ_OFFSET, &u.v8);
- off += scnprintf(buf + off, buf_size - off,
- "SBAR23SZ %hhu\n", u.v8);
- if (!ndev->bar4_split) {
- pci_read_config_byte(pdev, XEON_SBAR45SZ_OFFSET, &u.v8);
- off += scnprintf(buf + off, buf_size - off,
- "SBAR45SZ %hhu\n", u.v8);
- } else {
- pci_read_config_byte(pdev, XEON_SBAR4SZ_OFFSET, &u.v8);
- off += scnprintf(buf + off, buf_size - off,
- "SBAR4SZ %hhu\n", u.v8);
- pci_read_config_byte(pdev, XEON_SBAR5SZ_OFFSET, &u.v8);
- off += scnprintf(buf + off, buf_size - off,
- "SBAR5SZ %hhu\n", u.v8);
- }
-
- off += scnprintf(buf + off, buf_size - off,
- "\nNTB Incoming XLAT:\n");
-
- u.v64 = ioread64(mmio + bar2_off(ndev->xlat_reg->bar2_xlat, 2));
- off += scnprintf(buf + off, buf_size - off,
- "XLAT23 -\t\t%#018llx\n", u.v64);
-
- if (ndev->bar4_split) {
- u.v32 = ioread32(mmio + bar2_off(ndev->xlat_reg->bar2_xlat, 4));
- off += scnprintf(buf + off, buf_size - off,
- "XLAT4 -\t\t\t%#06x\n", u.v32);
-
- u.v32 = ioread32(mmio + bar2_off(ndev->xlat_reg->bar2_xlat, 5));
- off += scnprintf(buf + off, buf_size - off,
- "XLAT5 -\t\t\t%#06x\n", u.v32);
- } else {
- u.v64 = ioread64(mmio + bar2_off(ndev->xlat_reg->bar2_xlat, 4));
- off += scnprintf(buf + off, buf_size - off,
- "XLAT45 -\t\t%#018llx\n", u.v64);
- }
-
- u.v64 = ioread64(mmio + bar2_off(ndev->xlat_reg->bar2_limit, 2));
- off += scnprintf(buf + off, buf_size - off,
- "LMT23 -\t\t\t%#018llx\n", u.v64);
-
- if (ndev->bar4_split) {
- u.v32 = ioread32(mmio + bar2_off(ndev->xlat_reg->bar2_limit, 4));
- off += scnprintf(buf + off, buf_size - off,
- "LMT4 -\t\t\t%#06x\n", u.v32);
- u.v32 = ioread32(mmio + bar2_off(ndev->xlat_reg->bar2_limit, 5));
- off += scnprintf(buf + off, buf_size - off,
- "LMT5 -\t\t\t%#06x\n", u.v32);
- } else {
- u.v64 = ioread64(mmio + bar2_off(ndev->xlat_reg->bar2_limit, 4));
- off += scnprintf(buf + off, buf_size - off,
- "LMT45 -\t\t\t%#018llx\n", u.v64);
- }
-
- if (pdev_is_xeon(pdev)) {
- if (ntb_topo_is_b2b(ndev->ntb.topo)) {
- off += scnprintf(buf + off, buf_size - off,
- "\nNTB Outgoing B2B XLAT:\n");
-
- u.v64 = ioread64(mmio + XEON_PBAR23XLAT_OFFSET);
- off += scnprintf(buf + off, buf_size - off,
- "B2B XLAT23 -\t\t%#018llx\n", u.v64);
-
- if (ndev->bar4_split) {
- u.v32 = ioread32(mmio + XEON_PBAR4XLAT_OFFSET);
- off += scnprintf(buf + off, buf_size - off,
- "B2B XLAT4 -\t\t%#06x\n",
- u.v32);
- u.v32 = ioread32(mmio + XEON_PBAR5XLAT_OFFSET);
- off += scnprintf(buf + off, buf_size - off,
- "B2B XLAT5 -\t\t%#06x\n",
- u.v32);
- } else {
- u.v64 = ioread64(mmio + XEON_PBAR45XLAT_OFFSET);
- off += scnprintf(buf + off, buf_size - off,
- "B2B XLAT45 -\t\t%#018llx\n",
- u.v64);
- }
-
- u.v64 = ioread64(mmio + XEON_PBAR23LMT_OFFSET);
- off += scnprintf(buf + off, buf_size - off,
- "B2B LMT23 -\t\t%#018llx\n", u.v64);
-
- if (ndev->bar4_split) {
- u.v32 = ioread32(mmio + XEON_PBAR4LMT_OFFSET);
- off += scnprintf(buf + off, buf_size - off,
- "B2B LMT4 -\t\t%#06x\n",
- u.v32);
- u.v32 = ioread32(mmio + XEON_PBAR5LMT_OFFSET);
- off += scnprintf(buf + off, buf_size - off,
- "B2B LMT5 -\t\t%#06x\n",
- u.v32);
- } else {
- u.v64 = ioread64(mmio + XEON_PBAR45LMT_OFFSET);
- off += scnprintf(buf + off, buf_size - off,
- "B2B LMT45 -\t\t%#018llx\n",
- u.v64);
- }
-
- off += scnprintf(buf + off, buf_size - off,
- "\nNTB Secondary BAR:\n");
-
- u.v64 = ioread64(mmio + XEON_SBAR0BASE_OFFSET);
- off += scnprintf(buf + off, buf_size - off,
- "SBAR01 -\t\t%#018llx\n", u.v64);
-
- u.v64 = ioread64(mmio + XEON_SBAR23BASE_OFFSET);
- off += scnprintf(buf + off, buf_size - off,
- "SBAR23 -\t\t%#018llx\n", u.v64);
-
- if (ndev->bar4_split) {
- u.v32 = ioread32(mmio + XEON_SBAR4BASE_OFFSET);
- off += scnprintf(buf + off, buf_size - off,
- "SBAR4 -\t\t\t%#06x\n", u.v32);
- u.v32 = ioread32(mmio + XEON_SBAR5BASE_OFFSET);
- off += scnprintf(buf + off, buf_size - off,
- "SBAR5 -\t\t\t%#06x\n", u.v32);
- } else {
- u.v64 = ioread64(mmio + XEON_SBAR45BASE_OFFSET);
- off += scnprintf(buf + off, buf_size - off,
- "SBAR45 -\t\t%#018llx\n",
- u.v64);
- }
- }
-
- off += scnprintf(buf + off, buf_size - off,
- "\nXEON NTB Statistics:\n");
-
- u.v16 = ioread16(mmio + XEON_USMEMMISS_OFFSET);
- off += scnprintf(buf + off, buf_size - off,
- "Upstream Memory Miss -\t%u\n", u.v16);
-
- off += scnprintf(buf + off, buf_size - off,
- "\nXEON NTB Hardware Errors:\n");
-
- if (!pci_read_config_word(pdev,
- XEON_DEVSTS_OFFSET, &u.v16))
- off += scnprintf(buf + off, buf_size - off,
- "DEVSTS -\t\t%#06x\n", u.v16);
-
- if (!pci_read_config_word(pdev,
- XEON_LINK_STATUS_OFFSET, &u.v16))
- off += scnprintf(buf + off, buf_size - off,
- "LNKSTS -\t\t%#06x\n", u.v16);
-
- if (!pci_read_config_dword(pdev,
- XEON_UNCERRSTS_OFFSET, &u.v32))
- off += scnprintf(buf + off, buf_size - off,
- "UNCERRSTS -\t\t%#06x\n", u.v32);
-
- if (!pci_read_config_dword(pdev,
- XEON_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 ssize_t ndev_debugfs_read(struct file *filp, char __user *ubuf,
- size_t count, loff_t *offp)
-{
- struct intel_ntb_dev *ndev = filp->private_data;
-
- if (pdev_is_xeon(ndev->ntb.pdev))
- return ndev_ntb_debugfs_read(filp, ubuf, count, offp);
- else if (pdev_is_skx_xeon(ndev->ntb.pdev))
- return ndev_ntb3_debugfs_read(filp, ubuf, count, offp);
-
- return -ENXIO;
-}
-
-static void ndev_init_debugfs(struct intel_ntb_dev *ndev)
-{
- if (!debugfs_dir) {
- ndev->debugfs_dir = NULL;
- ndev->debugfs_info = NULL;
- } else {
- ndev->debugfs_dir =
- debugfs_create_dir(pci_name(ndev->ntb.pdev),
- debugfs_dir);
- if (!ndev->debugfs_dir)
- ndev->debugfs_info = NULL;
- else
- ndev->debugfs_info =
- debugfs_create_file("info", S_IRUSR,
- ndev->debugfs_dir, ndev,
- &intel_ntb_debugfs_info);
- }
-}
-
-static void ndev_deinit_debugfs(struct intel_ntb_dev *ndev)
-{
- debugfs_remove_recursive(ndev->debugfs_dir);
-}
-
-static int intel_ntb_mw_count(struct ntb_dev *ntb, int pidx)
-{
- if (pidx != NTB_DEF_PEER_IDX)
- return -EINVAL;
-
- return ntb_ndev(ntb)->mw_count;
-}
-
-static 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)
-{
- struct intel_ntb_dev *ndev = ntb_ndev(ntb);
- resource_size_t bar_size, mw_size;
- 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;
-
- if (addr_align)
- *addr_align = pci_resource_len(ndev->ntb.pdev, bar);
-
- if (size_align)
- *size_align = 1;
-
- if (size_max)
- *size_max = mw_size;
-
- return 0;
-}
-
-static int intel_ntb_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 base_reg, 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;
- base_reg = bar0_off(ndev->xlat_reg->bar0_base, bar);
- xlat_reg = bar2_off(ndev->xlat_reg->bar2_xlat, bar);
- limit_reg = bar2_off(ndev->xlat_reg->bar2_limit, bar);
-
- if (bar < 4 || !ndev->bar4_split) {
- base = ioread64(mmio + base_reg) & NTB_BAR_MASK_64;
-
- /* Set the limit if supported, if size is not mw_size */
- if (limit_reg && size != mw_size)
- limit = base + size;
- else
- limit = 0;
-
- /* 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;
- }
-
- /* 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;
- }
- } else {
- /* split bar addr range must all be 32 bit */
- if (addr & (~0ull << 32))
- return -EINVAL;
- if ((addr + size) & (~0ull << 32))
- return -EINVAL;
-
- base = ioread32(mmio + base_reg) & NTB_BAR_MASK_32;
-
- /* Set the limit if supported, if size is not mw_size */
- if (limit_reg && size != mw_size)
- limit = base + size;
- else
- limit = 0;
-
- /* set and verify setting the translation address */
- iowrite32(addr, mmio + xlat_reg);
- reg_val = ioread32(mmio + xlat_reg);
- if (reg_val != addr) {
- iowrite32(0, mmio + xlat_reg);
- return -EIO;
- }
-
- /* set and verify setting the limit */
- iowrite32(limit, mmio + limit_reg);
- reg_val = ioread32(mmio + limit_reg);
- if (reg_val != limit) {
- iowrite32(base, mmio + limit_reg);
- iowrite32(0, mmio + xlat_reg);
- return -EIO;
- }
- }
-
- return 0;
-}
-
-static u64 intel_ntb_link_is_up(struct ntb_dev *ntb,
- enum ntb_speed *speed,
- enum ntb_width *width)
-{
- struct intel_ntb_dev *ndev = ntb_ndev(ntb);
-
- if (ndev->reg->link_is_up(ndev)) {
- if (speed)
- *speed = NTB_LNK_STA_SPEED(ndev->lnk_sta);
- if (width)
- *width = NTB_LNK_STA_WIDTH(ndev->lnk_sta);
- return 1;
- } else {
- /* TODO MAYBE: is it possible to observe the link speed and
- * width while link is training? */
- if (speed)
- *speed = NTB_SPEED_NONE;
- if (width)
- *width = NTB_WIDTH_NONE;
- return 0;
- }
-}
-
-static int intel_ntb_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);
-
- if (ndev->ntb.topo == NTB_TOPO_SEC)
- return -EINVAL;
-
- 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;
- if (ndev->bar4_split)
- ntb_ctl |= NTB_CTL_P2S_BAR5_SNOOP | NTB_CTL_S2P_BAR5_SNOOP;
- iowrite32(ntb_ctl, ndev->self_mmio + ndev->reg->ntb_ctl);
-
- return 0;
-}
-
-static int intel_ntb_link_disable(struct ntb_dev *ntb)
-{
- struct intel_ntb_dev *ndev;
- u32 ntb_cntl;
-
- ndev = container_of(ntb, struct intel_ntb_dev, ntb);
-
- if (ndev->ntb.topo == NTB_TOPO_SEC)
- return -EINVAL;
-
- dev_dbg(&ntb->pdev->dev, "Disabling link\n");
-
- /* Bring NTB link down */
- ntb_cntl = ioread32(ndev->self_mmio + ndev->reg->ntb_ctl);
- ntb_cntl &= ~(NTB_CTL_P2S_BAR2_SNOOP | NTB_CTL_S2P_BAR2_SNOOP);
- ntb_cntl &= ~(NTB_CTL_P2S_BAR4_SNOOP | NTB_CTL_S2P_BAR4_SNOOP);
- if (ndev->bar4_split)
- ntb_cntl &= ~(NTB_CTL_P2S_BAR5_SNOOP | NTB_CTL_S2P_BAR5_SNOOP);
- ntb_cntl |= NTB_CTL_DISABLE | NTB_CTL_CFG_LOCK;
- iowrite32(ntb_cntl, ndev->self_mmio + ndev->reg->ntb_ctl);
-
- return 0;
-}
-
-static int intel_ntb_peer_mw_count(struct ntb_dev *ntb)
-{
- /* Numbers of inbound and outbound memory windows match */
- return ntb_ndev(ntb)->mw_count;
-}
-
-static int intel_ntb_peer_mw_get_addr(struct ntb_dev *ntb, int idx,
- phys_addr_t *base, resource_size_t *size)
-{
- struct intel_ntb_dev *ndev = ntb_ndev(ntb);
- int bar;
-
- if (idx >= ndev->b2b_idx && !ndev->b2b_off)
- idx += 1;
-
- bar = ndev_mw_to_bar(ndev, idx);
- if (bar < 0)
- return bar;
-
- if (base)
- *base = pci_resource_start(ndev->ntb.pdev, bar) +
- (idx == ndev->b2b_idx ? ndev->b2b_off : 0);
-
- if (size)
- *size = pci_resource_len(ndev->ntb.pdev, bar) -
- (idx == ndev->b2b_idx ? ndev->b2b_off : 0);
-
- return 0;
-}
-
-static int intel_ntb_db_is_unsafe(struct ntb_dev *ntb)
-{
- return ndev_ignore_unsafe(ntb_ndev(ntb), NTB_UNSAFE_DB);
-}
-
-static u64 intel_ntb_db_valid_mask(struct ntb_dev *ntb)
-{
- return ntb_ndev(ntb)->db_valid_mask;
-}
-
-static int intel_ntb_db_vector_count(struct ntb_dev *ntb)
-{
- struct intel_ntb_dev *ndev;
-
- ndev = container_of(ntb, struct intel_ntb_dev, ntb);
-
- return ndev->db_vec_count;
-}
-
-static u64 intel_ntb_db_vector_mask(struct ntb_dev *ntb, int db_vector)
-{
- struct intel_ntb_dev *ndev = ntb_ndev(ntb);
-
- if (db_vector < 0 || db_vector > ndev->db_vec_count)
- return 0;
-
- return ndev->db_valid_mask & ndev_vec_mask(ndev, db_vector);
-}
-
-static u64 intel_ntb_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_bell);
-}
-
-static int intel_ntb_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_bell);
-}
-
-static int intel_ntb_db_set_mask(struct ntb_dev *ntb, u64 db_bits)
-{
- struct intel_ntb_dev *ndev = ntb_ndev(ntb);
-
- return ndev_db_set_mask(ndev, db_bits,
- ndev->self_mmio +
- ndev->self_reg->db_mask);
-}
-
-static int intel_ntb_db_clear_mask(struct ntb_dev *ntb, u64 db_bits)
-{
- struct intel_ntb_dev *ndev = ntb_ndev(ntb);
-
- return ndev_db_clear_mask(ndev, db_bits,
- ndev->self_mmio +
- ndev->self_reg->db_mask);
-}
-
-static int intel_ntb_peer_db_addr(struct ntb_dev *ntb,
- phys_addr_t *db_addr,
- resource_size_t *db_size)
-{
- struct intel_ntb_dev *ndev = ntb_ndev(ntb);
-
- return ndev_db_addr(ndev, db_addr, db_size, ndev->peer_addr,
- ndev->peer_reg->db_bell);
-}
-
-static int intel_ntb_peer_db_set(struct ntb_dev *ntb, u64 db_bits)
-{
- struct intel_ntb_dev *ndev = ntb_ndev(ntb);
-
- return ndev_db_write(ndev, db_bits,
- ndev->peer_mmio +
- ndev->peer_reg->db_bell);
-}
-
-static int intel_ntb_spad_is_unsafe(struct ntb_dev *ntb)
-{
- return ndev_ignore_unsafe(ntb_ndev(ntb), NTB_UNSAFE_SPAD);
-}
-
-static int intel_ntb_spad_count(struct ntb_dev *ntb)
-{
- struct intel_ntb_dev *ndev;
-
- ndev = container_of(ntb, struct intel_ntb_dev, ntb);
-
- return ndev->spad_count;
-}
-
-static u32 intel_ntb_spad_read(struct ntb_dev *ntb, int idx)
-{
- struct intel_ntb_dev *ndev = ntb_ndev(ntb);
-
- return ndev_spad_read(ndev, idx,
- ndev->self_mmio +
- ndev->self_reg->spad);
-}
-
-static int intel_ntb_spad_write(struct ntb_dev *ntb,
- int idx, u32 val)
-{
- struct intel_ntb_dev *ndev = ntb_ndev(ntb);
-
- return ndev_spad_write(ndev, idx, val,
- ndev->self_mmio +
- ndev->self_reg->spad);
-}
-
-static int intel_ntb_peer_spad_addr(struct ntb_dev *ntb, int pidx, int sidx,
- phys_addr_t *spad_addr)
-{
- struct intel_ntb_dev *ndev = ntb_ndev(ntb);
-
- return ndev_spad_addr(ndev, sidx, spad_addr, ndev->peer_addr,
- ndev->peer_reg->spad);
-}
-
-static u32 intel_ntb_peer_spad_read(struct ntb_dev *ntb, int pidx, int sidx)
-{
- struct intel_ntb_dev *ndev = ntb_ndev(ntb);
-
- return ndev_spad_read(ndev, sidx,
- ndev->peer_mmio +
- ndev->peer_reg->spad);
-}
-
-static int intel_ntb_peer_spad_write(struct ntb_dev *ntb, int pidx,
- int sidx, u32 val)
-{
- struct intel_ntb_dev *ndev = ntb_ndev(ntb);
-
- return ndev_spad_write(ndev, sidx, val,
- ndev->peer_mmio +
- ndev->peer_reg->spad);
-}
-
-/* Skylake Xeon NTB */
-
-static int skx_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,
- SKX_LINK_STATUS_OFFSET, ®_val);
- if (rc)
- return 0;
-
- if (reg_val == ndev->lnk_sta)
- return 0;
-
- ndev->lnk_sta = reg_val;
-
- return 1;
-}
-
-static u64 skx_db_ioread(void __iomem *mmio)
-{
- return ioread64(mmio);
-}
-
-static void skx_db_iowrite(u64 bits, void __iomem *mmio)
-{
- iowrite64(bits, mmio);
-}
-
-static int skx_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 < SKX_DB_MSIX_VECTOR_COUNT; i++)
- iowrite8(i, ndev->self_mmio + SKX_INTVEC_OFFSET + i);
-
- /* move link status down one as workaround */
- if (ndev->hwerr_flags & NTB_HWERR_MSIX_VECTOR32_BAD) {
- iowrite8(SKX_DB_MSIX_VECTOR_COUNT - 2,
- ndev->self_mmio + SKX_INTVEC_OFFSET +
- (SKX_DB_MSIX_VECTOR_COUNT - 1));
- }
-
- return ndev_init_isr(ndev, SKX_DB_MSIX_VECTOR_COUNT,
- SKX_DB_MSIX_VECTOR_COUNT,
- SKX_DB_MSIX_VECTOR_SHIFT,
- SKX_DB_TOTAL_SHIFT);
-}
-
-static int skx_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 + SKX_IMBAR1XLMT_OFFSET);
- bar_addr = ioread64(mmio + SKX_IMBAR1XLMT_OFFSET);
- dev_dbg(&pdev->dev, "IMBAR1XLMT %#018llx\n", bar_addr);
-
- bar_addr = addr->bar4_addr64;
- iowrite64(bar_addr, mmio + SKX_IMBAR2XLMT_OFFSET);
- bar_addr = ioread64(mmio + SKX_IMBAR2XLMT_OFFSET);
- dev_dbg(&pdev->dev, "IMBAR2XLMT %#018llx\n", bar_addr);
-
- /* zero incoming translation addrs */
- iowrite64(0, mmio + SKX_IMBAR1XBASE_OFFSET);
- iowrite64(0, mmio + SKX_IMBAR2XBASE_OFFSET);
-
- ndev->peer_mmio = ndev->self_mmio;
-
- return 0;
-}
-
-static int skx_init_ntb(struct intel_ntb_dev *ndev)
-{
- int rc;
-
-
- ndev->mw_count = XEON_MW_COUNT;
- ndev->spad_count = SKX_SPAD_COUNT;
- ndev->db_count = SKX_DB_COUNT;
- ndev->db_link_mask = SKX_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 = &skx_pri_reg;
- ndev->peer_reg = &skx_b2b_reg;
- ndev->xlat_reg = &skx_sec_xlat;
-
- if (ndev->ntb.topo == NTB_TOPO_B2B_USD) {
- rc = skx_setup_b2b_mw(ndev,
- &xeon_b2b_dsd_addr,
- &xeon_b2b_usd_addr);
- } else {
- rc = skx_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 + SKX_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;
-}
-
-static int skx_init_dev(struct intel_ntb_dev *ndev)
-{
- struct pci_dev *pdev;
- u8 ppd;
- int rc;
-
- pdev = ndev->ntb.pdev;
-
- ndev->reg = &skx_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;
-
- if (pdev_is_skx_xeon(pdev))
- ndev->hwerr_flags |= NTB_HWERR_MSIX_VECTOR32_BAD;
-
- rc = skx_init_ntb(ndev);
- if (rc)
- return rc;
-
- return skx_init_isr(ndev);
-}
-
-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 + SKX_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);
-}
-
-/* XEON */
-
-static u64 xeon_db_ioread(void __iomem *mmio)
-{
- return (u64)ioread16(mmio);
-}
-
-static void xeon_db_iowrite(u64 bits, void __iomem *mmio)
-{
- iowrite16((u16)bits, mmio);
-}
-
-static int xeon_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_bell);
-
- rc = pci_read_config_word(ndev->ntb.pdev,
- XEON_LINK_STATUS_OFFSET, ®_val);
- if (rc)
- return 0;
-
- if (reg_val == ndev->lnk_sta)
- return 0;
-
- ndev->lnk_sta = reg_val;
-
- return 1;
-}
-
-static int xeon_link_is_up(struct intel_ntb_dev *ndev)
-{
- if (ndev->ntb.topo == NTB_TOPO_SEC)
- return 1;
-
- return NTB_LNK_STA_ACTIVE(ndev->lnk_sta);
-}
-
-static inline enum ntb_topo xeon_ppd_topo(struct intel_ntb_dev *ndev, u8 ppd)
-{
- switch (ppd & XEON_PPD_TOPO_MASK) {
- case XEON_PPD_TOPO_B2B_USD:
- return NTB_TOPO_B2B_USD;
-
- case XEON_PPD_TOPO_B2B_DSD:
- return NTB_TOPO_B2B_DSD;
-
- case XEON_PPD_TOPO_PRI_USD:
- case XEON_PPD_TOPO_PRI_DSD: /* accept bogus PRI_DSD */
- return NTB_TOPO_PRI;
-
- case XEON_PPD_TOPO_SEC_USD:
- case XEON_PPD_TOPO_SEC_DSD: /* accept bogus SEC_DSD */
- return NTB_TOPO_SEC;
- }
-
- return NTB_TOPO_NONE;
-}
-
-static inline int xeon_ppd_bar4_split(struct intel_ntb_dev *ndev, u8 ppd)
-{
- if (ppd & XEON_PPD_SPLIT_BAR_MASK) {
- dev_dbg(&ndev->ntb.pdev->dev, "PPD %d split bar\n", ppd);
- return 1;
- }
- return 0;
-}
-
-static int xeon_init_isr(struct intel_ntb_dev *ndev)
-{
- return ndev_init_isr(ndev, XEON_DB_MSIX_VECTOR_COUNT,
- XEON_DB_MSIX_VECTOR_COUNT,
- XEON_DB_MSIX_VECTOR_SHIFT,
- XEON_DB_TOTAL_SHIFT);
-}
-
-static void xeon_deinit_isr(struct intel_ntb_dev *ndev)
-{
- ndev_deinit_isr(ndev);
-}
-
-static int xeon_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;
- resource_size_t bar_size;
- phys_addr_t bar_addr;
- int b2b_bar;
- u8 bar_sz;
-
- pdev = ndev->ntb.pdev;
- mmio = ndev->self_mmio;
-
- if (ndev->b2b_idx == UINT_MAX) {
- dev_dbg(&pdev->dev, "not using b2b mw\n");
- b2b_bar = 0;
- ndev->b2b_off = 0;
- } else {
- b2b_bar = ndev_mw_to_bar(ndev, ndev->b2b_idx);
- if (b2b_bar < 0)
- return -EIO;
-
- dev_dbg(&pdev->dev, "using b2b mw bar %d\n", b2b_bar);
-
- bar_size = pci_resource_len(ndev->ntb.pdev, b2b_bar);
-
- dev_dbg(&pdev->dev, "b2b bar size %#llx\n", bar_size);
-
- if (b2b_mw_share && XEON_B2B_MIN_SIZE <= bar_size >> 1) {
- dev_dbg(&pdev->dev, "b2b using first half of bar\n");
- ndev->b2b_off = bar_size >> 1;
- } else if (XEON_B2B_MIN_SIZE <= bar_size) {
- dev_dbg(&pdev->dev, "b2b using whole bar\n");
- ndev->b2b_off = 0;
- --ndev->mw_count;
- } else {
- dev_dbg(&pdev->dev, "b2b bar size is too small\n");
- return -EIO;
- }
- }
-
- /* Reset the secondary bar sizes to match the primary bar sizes,
- * except disable or halve the size of the b2b secondary bar.
- *
- * Note: code for each specific bar size register, because the register
- * offsets are not in a consistent order (bar5sz comes after ppd, odd).
- */
- pci_read_config_byte(pdev, XEON_PBAR23SZ_OFFSET, &bar_sz);
- dev_dbg(&pdev->dev, "PBAR23SZ %#x\n", bar_sz);
- if (b2b_bar == 2) {
- if (ndev->b2b_off)
- bar_sz -= 1;
- else
- bar_sz = 0;
- }
- pci_write_config_byte(pdev, XEON_SBAR23SZ_OFFSET, bar_sz);
- pci_read_config_byte(pdev, XEON_SBAR23SZ_OFFSET, &bar_sz);
- dev_dbg(&pdev->dev, "SBAR23SZ %#x\n", bar_sz);
-
- if (!ndev->bar4_split) {
- pci_read_config_byte(pdev, XEON_PBAR45SZ_OFFSET, &bar_sz);
- dev_dbg(&pdev->dev, "PBAR45SZ %#x\n", bar_sz);
- if (b2b_bar == 4) {
- if (ndev->b2b_off)
- bar_sz -= 1;
- else
- bar_sz = 0;
- }
- pci_write_config_byte(pdev, XEON_SBAR45SZ_OFFSET, bar_sz);
- pci_read_config_byte(pdev, XEON_SBAR45SZ_OFFSET, &bar_sz);
- dev_dbg(&pdev->dev, "SBAR45SZ %#x\n", bar_sz);
- } else {
- pci_read_config_byte(pdev, XEON_PBAR4SZ_OFFSET, &bar_sz);
- dev_dbg(&pdev->dev, "PBAR4SZ %#x\n", bar_sz);
- if (b2b_bar == 4) {
- if (ndev->b2b_off)
- bar_sz -= 1;
- else
- bar_sz = 0;
- }
- pci_write_config_byte(pdev, XEON_SBAR4SZ_OFFSET, bar_sz);
- pci_read_config_byte(pdev, XEON_SBAR4SZ_OFFSET, &bar_sz);
- dev_dbg(&pdev->dev, "SBAR4SZ %#x\n", bar_sz);
-
- pci_read_config_byte(pdev, XEON_PBAR5SZ_OFFSET, &bar_sz);
- dev_dbg(&pdev->dev, "PBAR5SZ %#x\n", bar_sz);
- if (b2b_bar == 5) {
- if (ndev->b2b_off)
- bar_sz -= 1;
- else
- bar_sz = 0;
- }
- pci_write_config_byte(pdev, XEON_SBAR5SZ_OFFSET, bar_sz);
- pci_read_config_byte(pdev, XEON_SBAR5SZ_OFFSET, &bar_sz);
- dev_dbg(&pdev->dev, "SBAR5SZ %#x\n", bar_sz);
- }
-
- /* SBAR01 hit by first part of the b2b bar */
- if (b2b_bar == 0)
- bar_addr = addr->bar0_addr;
- else if (b2b_bar == 2)
- bar_addr = addr->bar2_addr64;
- else if (b2b_bar == 4 && !ndev->bar4_split)
- bar_addr = addr->bar4_addr64;
- else if (b2b_bar == 4)
- bar_addr = addr->bar4_addr32;
- else if (b2b_bar == 5)
- bar_addr = addr->bar5_addr32;
- else
- return -EIO;
-
- dev_dbg(&pdev->dev, "SBAR01 %#018llx\n", bar_addr);
- iowrite64(bar_addr, mmio + XEON_SBAR0BASE_OFFSET);
-
- /* Other SBAR are normally hit by the PBAR xlat, except for b2b bar.
- * The b2b bar is either disabled above, or configured half-size, and
- * it starts at the PBAR xlat + offset.
- */
-
- bar_addr = addr->bar2_addr64 + (b2b_bar == 2 ? ndev->b2b_off : 0);
- iowrite64(bar_addr, mmio + XEON_SBAR23BASE_OFFSET);
- bar_addr = ioread64(mmio + XEON_SBAR23BASE_OFFSET);
- dev_dbg(&pdev->dev, "SBAR23 %#018llx\n", bar_addr);
-
- if (!ndev->bar4_split) {
- bar_addr = addr->bar4_addr64 +
- (b2b_bar == 4 ? ndev->b2b_off : 0);
- iowrite64(bar_addr, mmio + XEON_SBAR45BASE_OFFSET);
- bar_addr = ioread64(mmio + XEON_SBAR45BASE_OFFSET);
- dev_dbg(&pdev->dev, "SBAR45 %#018llx\n", bar_addr);
- } else {
- bar_addr = addr->bar4_addr32 +
- (b2b_bar == 4 ? ndev->b2b_off : 0);
- iowrite32(bar_addr, mmio + XEON_SBAR4BASE_OFFSET);
- bar_addr = ioread32(mmio + XEON_SBAR4BASE_OFFSET);
- dev_dbg(&pdev->dev, "SBAR4 %#010llx\n", bar_addr);
-
- bar_addr = addr->bar5_addr32 +
- (b2b_bar == 5 ? ndev->b2b_off : 0);
- iowrite32(bar_addr, mmio + XEON_SBAR5BASE_OFFSET);
- bar_addr = ioread32(mmio + XEON_SBAR5BASE_OFFSET);
- dev_dbg(&pdev->dev, "SBAR5 %#010llx\n", bar_addr);
- }
-
- /* setup incoming bar limits == base addrs (zero length windows) */
-
- bar_addr = addr->bar2_addr64 + (b2b_bar == 2 ? ndev->b2b_off : 0);
- iowrite64(bar_addr, mmio + XEON_SBAR23LMT_OFFSET);
- bar_addr = ioread64(mmio + XEON_SBAR23LMT_OFFSET);
- dev_dbg(&pdev->dev, "SBAR23LMT %#018llx\n", bar_addr);
-
- if (!ndev->bar4_split) {
- bar_addr = addr->bar4_addr64 +
- (b2b_bar == 4 ? ndev->b2b_off : 0);
- iowrite64(bar_addr, mmio + XEON_SBAR45LMT_OFFSET);
- bar_addr = ioread64(mmio + XEON_SBAR45LMT_OFFSET);
- dev_dbg(&pdev->dev, "SBAR45LMT %#018llx\n", bar_addr);
- } else {
- bar_addr = addr->bar4_addr32 +
- (b2b_bar == 4 ? ndev->b2b_off : 0);
- iowrite32(bar_addr, mmio + XEON_SBAR4LMT_OFFSET);
- bar_addr = ioread32(mmio + XEON_SBAR4LMT_OFFSET);
- dev_dbg(&pdev->dev, "SBAR4LMT %#010llx\n", bar_addr);
-
- bar_addr = addr->bar5_addr32 +
- (b2b_bar == 5 ? ndev->b2b_off : 0);
- iowrite32(bar_addr, mmio + XEON_SBAR5LMT_OFFSET);
- bar_addr = ioread32(mmio + XEON_SBAR5LMT_OFFSET);
- dev_dbg(&pdev->dev, "SBAR5LMT %#05llx\n", bar_addr);
- }
-
- /* zero incoming translation addrs */
- iowrite64(0, mmio + XEON_SBAR23XLAT_OFFSET);
-
- if (!ndev->bar4_split) {
- iowrite64(0, mmio + XEON_SBAR45XLAT_OFFSET);
- } else {
- iowrite32(0, mmio + XEON_SBAR4XLAT_OFFSET);
- iowrite32(0, mmio + XEON_SBAR5XLAT_OFFSET);
- }
-
- /* zero outgoing translation limits (whole bar size windows) */
- iowrite64(0, mmio + XEON_PBAR23LMT_OFFSET);
- if (!ndev->bar4_split) {
- iowrite64(0, mmio + XEON_PBAR45LMT_OFFSET);
- } else {
- iowrite32(0, mmio + XEON_PBAR4LMT_OFFSET);
- iowrite32(0, mmio + XEON_PBAR5LMT_OFFSET);
- }
-
- /* set outgoing translation offsets */
- bar_addr = peer_addr->bar2_addr64;
- iowrite64(bar_addr, mmio + XEON_PBAR23XLAT_OFFSET);
- bar_addr = ioread64(mmio + XEON_PBAR23XLAT_OFFSET);
- dev_dbg(&pdev->dev, "PBAR23XLAT %#018llx\n", bar_addr);
-
- if (!ndev->bar4_split) {
- bar_addr = peer_addr->bar4_addr64;
- iowrite64(bar_addr, mmio + XEON_PBAR45XLAT_OFFSET);
- bar_addr = ioread64(mmio + XEON_PBAR45XLAT_OFFSET);
- dev_dbg(&pdev->dev, "PBAR45XLAT %#018llx\n", bar_addr);
- } else {
- bar_addr = peer_addr->bar4_addr32;
- iowrite32(bar_addr, mmio + XEON_PBAR4XLAT_OFFSET);
- bar_addr = ioread32(mmio + XEON_PBAR4XLAT_OFFSET);
- dev_dbg(&pdev->dev, "PBAR4XLAT %#010llx\n", bar_addr);
-
- bar_addr = peer_addr->bar5_addr32;
- iowrite32(bar_addr, mmio + XEON_PBAR5XLAT_OFFSET);
- bar_addr = ioread32(mmio + XEON_PBAR5XLAT_OFFSET);
- dev_dbg(&pdev->dev, "PBAR5XLAT %#010llx\n", bar_addr);
- }
-
- /* set the translation offset for b2b registers */
- if (b2b_bar == 0)
- bar_addr = peer_addr->bar0_addr;
- else if (b2b_bar == 2)
- bar_addr = peer_addr->bar2_addr64;
- else if (b2b_bar == 4 && !ndev->bar4_split)
- bar_addr = peer_addr->bar4_addr64;
- else if (b2b_bar == 4)
- bar_addr = peer_addr->bar4_addr32;
- else if (b2b_bar == 5)
- bar_addr = peer_addr->bar5_addr32;
- else
- return -EIO;
-
- /* B2B_XLAT_OFFSET is 64bit, but can only take 32bit writes */
- dev_dbg(&pdev->dev, "B2BXLAT %#018llx\n", bar_addr);
- iowrite32(bar_addr, mmio + XEON_B2B_XLAT_OFFSETL);
- iowrite32(bar_addr >> 32, mmio + XEON_B2B_XLAT_OFFSETU);
-
- if (b2b_bar) {
- /* map peer ntb mmio config space registers */
- ndev->peer_mmio = pci_iomap(pdev, b2b_bar,
- XEON_B2B_MIN_SIZE);
- if (!ndev->peer_mmio)
- return -EIO;
-
- ndev->peer_addr = pci_resource_start(pdev, b2b_bar);
- }
-
- return 0;
-}
-
-static int xeon_init_ntb(struct intel_ntb_dev *ndev)
-{
- struct device *dev = &ndev->ntb.pdev->dev;
- int rc;
- u32 ntb_ctl;
-
- if (ndev->bar4_split)
- ndev->mw_count = HSX_SPLIT_BAR_MW_COUNT;
- else
- ndev->mw_count = XEON_MW_COUNT;
-
- ndev->spad_count = XEON_SPAD_COUNT;
- ndev->db_count = XEON_DB_COUNT;
- ndev->db_link_mask = XEON_DB_LINK_BIT;
-
- switch (ndev->ntb.topo) {
- case NTB_TOPO_PRI:
- if (ndev->hwerr_flags & NTB_HWERR_SDOORBELL_LOCKUP) {
- dev_err(dev, "NTB Primary config disabled\n");
- return -EINVAL;
- }
-
- /* enable link to allow secondary side device to appear */
- ntb_ctl = ioread32(ndev->self_mmio + ndev->reg->ntb_ctl);
- ntb_ctl &= ~NTB_CTL_DISABLE;
- iowrite32(ntb_ctl, ndev->self_mmio + ndev->reg->ntb_ctl);
-
- /* use half the spads for the peer */
- ndev->spad_count >>= 1;
- ndev->self_reg = &xeon_pri_reg;
- ndev->peer_reg = &xeon_sec_reg;
- ndev->xlat_reg = &xeon_sec_xlat;
- break;
-
- case NTB_TOPO_SEC:
- if (ndev->hwerr_flags & NTB_HWERR_SDOORBELL_LOCKUP) {
- dev_err(dev, "NTB Secondary config disabled\n");
- return -EINVAL;
- }
- /* use half the spads for the peer */
- ndev->spad_count >>= 1;
- ndev->self_reg = &xeon_sec_reg;
- ndev->peer_reg = &xeon_pri_reg;
- ndev->xlat_reg = &xeon_pri_xlat;
- break;
-
- case NTB_TOPO_B2B_USD:
- case NTB_TOPO_B2B_DSD:
- ndev->self_reg = &xeon_pri_reg;
- ndev->peer_reg = &xeon_b2b_reg;
- ndev->xlat_reg = &xeon_sec_xlat;
-
- if (ndev->hwerr_flags & NTB_HWERR_SDOORBELL_LOCKUP) {
- ndev->peer_reg = &xeon_pri_reg;
-
- if (b2b_mw_idx < 0)
- ndev->b2b_idx = b2b_mw_idx + ndev->mw_count;
- else
- ndev->b2b_idx = b2b_mw_idx;
-
- if (ndev->b2b_idx >= ndev->mw_count) {
- dev_dbg(dev,
- "b2b_mw_idx %d invalid for mw_count %u\n",
- b2b_mw_idx, ndev->mw_count);
- return -EINVAL;
- }
-
- dev_dbg(dev, "setting up b2b mw idx %d means %d\n",
- b2b_mw_idx, ndev->b2b_idx);
-
- } else if (ndev->hwerr_flags & NTB_HWERR_B2BDOORBELL_BIT14) {
- dev_warn(dev, "Reduce doorbell count by 1\n");
- ndev->db_count -= 1;
- }
-
- if (ndev->ntb.topo == NTB_TOPO_B2B_USD) {
- rc = xeon_setup_b2b_mw(ndev,
- &xeon_b2b_dsd_addr,
- &xeon_b2b_usd_addr);
- } else {
- rc = xeon_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 + XEON_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;
-}
-
-static int xeon_init_dev(struct intel_ntb_dev *ndev)
-{
- struct pci_dev *pdev;
- u8 ppd;
- int rc, mem;
-
- pdev = ndev->ntb.pdev;
-
- switch (pdev->device) {
- /* There is a Xeon hardware errata related to writes to SDOORBELL or
- * B2BDOORBELL in conjunction with inbound access to NTB MMIO Space,
- * which may hang the system. To workaround this use the second memory
- * window to access the interrupt and scratch pad registers on the
- * remote system.
- */
- case PCI_DEVICE_ID_INTEL_NTB_SS_JSF:
- case PCI_DEVICE_ID_INTEL_NTB_PS_JSF:
- case PCI_DEVICE_ID_INTEL_NTB_B2B_JSF:
- case PCI_DEVICE_ID_INTEL_NTB_SS_SNB:
- case PCI_DEVICE_ID_INTEL_NTB_PS_SNB:
- case PCI_DEVICE_ID_INTEL_NTB_B2B_SNB:
- case PCI_DEVICE_ID_INTEL_NTB_SS_IVT:
- case PCI_DEVICE_ID_INTEL_NTB_PS_IVT:
- case PCI_DEVICE_ID_INTEL_NTB_B2B_IVT:
- case PCI_DEVICE_ID_INTEL_NTB_SS_HSX:
- case PCI_DEVICE_ID_INTEL_NTB_PS_HSX:
- case PCI_DEVICE_ID_INTEL_NTB_B2B_HSX:
- case PCI_DEVICE_ID_INTEL_NTB_SS_BDX:
- case PCI_DEVICE_ID_INTEL_NTB_PS_BDX:
- case PCI_DEVICE_ID_INTEL_NTB_B2B_BDX:
- ndev->hwerr_flags |= NTB_HWERR_SDOORBELL_LOCKUP;
- break;
- }
-
- switch (pdev->device) {
- /* There is a hardware errata related to accessing any register in
- * SB01BASE in the presence of bidirectional traffic crossing the NTB.
- */
- case PCI_DEVICE_ID_INTEL_NTB_SS_IVT:
- case PCI_DEVICE_ID_INTEL_NTB_PS_IVT:
- case PCI_DEVICE_ID_INTEL_NTB_B2B_IVT:
- case PCI_DEVICE_ID_INTEL_NTB_SS_HSX:
- case PCI_DEVICE_ID_INTEL_NTB_PS_HSX:
- case PCI_DEVICE_ID_INTEL_NTB_B2B_HSX:
- case PCI_DEVICE_ID_INTEL_NTB_SS_BDX:
- case PCI_DEVICE_ID_INTEL_NTB_PS_BDX:
- case PCI_DEVICE_ID_INTEL_NTB_B2B_BDX:
- ndev->hwerr_flags |= NTB_HWERR_SB01BASE_LOCKUP;
- break;
- }
-
- switch (pdev->device) {
- /* HW Errata on bit 14 of b2bdoorbell register. Writes will not be
- * mirrored to the remote system. Shrink the number of bits by one,
- * since bit 14 is the last bit.
- */
- case PCI_DEVICE_ID_INTEL_NTB_SS_JSF:
- case PCI_DEVICE_ID_INTEL_NTB_PS_JSF:
- case PCI_DEVICE_ID_INTEL_NTB_B2B_JSF:
- case PCI_DEVICE_ID_INTEL_NTB_SS_SNB:
- case PCI_DEVICE_ID_INTEL_NTB_PS_SNB:
- case PCI_DEVICE_ID_INTEL_NTB_B2B_SNB:
- case PCI_DEVICE_ID_INTEL_NTB_SS_IVT:
- case PCI_DEVICE_ID_INTEL_NTB_PS_IVT:
- case PCI_DEVICE_ID_INTEL_NTB_B2B_IVT:
- case PCI_DEVICE_ID_INTEL_NTB_SS_HSX:
- case PCI_DEVICE_ID_INTEL_NTB_PS_HSX:
- case PCI_DEVICE_ID_INTEL_NTB_B2B_HSX:
- case PCI_DEVICE_ID_INTEL_NTB_SS_BDX:
- case PCI_DEVICE_ID_INTEL_NTB_PS_BDX:
- case PCI_DEVICE_ID_INTEL_NTB_B2B_BDX:
- ndev->hwerr_flags |= NTB_HWERR_B2BDOORBELL_BIT14;
- break;
- }
-
- ndev->reg = &xeon_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;
-
- if (ndev->ntb.topo != NTB_TOPO_SEC) {
- ndev->bar4_split = xeon_ppd_bar4_split(ndev, ppd);
- dev_dbg(&pdev->dev, "ppd %#x bar4_split %d\n",
- ppd, ndev->bar4_split);
- } else {
- /* This is a way for transparent BAR to figure out if we are
- * doing split BAR or not. There is no way for the hw on the
- * transparent side to know and set the PPD.
- */
- mem = pci_select_bars(pdev, IORESOURCE_MEM);
- ndev->bar4_split = hweight32(mem) ==
- HSX_SPLIT_BAR_MW_COUNT + 1;
- dev_dbg(&pdev->dev, "mem %#x bar4_split %d\n",
- mem, ndev->bar4_split);
- }
-
- rc = xeon_init_ntb(ndev);
- if (rc)
- return rc;
-
- return xeon_init_isr(ndev);
-}
-
-static void xeon_deinit_dev(struct intel_ntb_dev *ndev)
-{
- xeon_deinit_isr(ndev);
-}
-
-static int intel_ntb_init_pci(struct intel_ntb_dev *ndev, struct pci_dev *pdev)
-{
- int rc;
-
- pci_set_drvdata(pdev, ndev);
-
- rc = pci_enable_device(pdev);
- if (rc)
- goto err_pci_enable;
-
- rc = pci_request_regions(pdev, NTB_NAME);
- if (rc)
- goto err_pci_regions;
-
- pci_set_master(pdev);
-
- rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
- if (rc) {
- rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
- if (rc)
- goto err_dma_mask;
- dev_warn(&pdev->dev, "Cannot DMA highmem\n");
- }
-
- rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
- if (rc) {
- rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
- if (rc)
- goto err_dma_mask;
- dev_warn(&pdev->dev, "Cannot DMA consistent highmem\n");
- }
- rc = dma_coerce_mask_and_coherent(&ndev->ntb.dev,
- dma_get_mask(&pdev->dev));
- if (rc)
- goto err_dma_mask;
-
- ndev->self_mmio = pci_iomap(pdev, 0, 0);
- if (!ndev->self_mmio) {
- rc = -EIO;
- goto err_mmio;
- }
- ndev->peer_mmio = ndev->self_mmio;
- ndev->peer_addr = pci_resource_start(pdev, 0);
-
- return 0;
-
-err_mmio:
-err_dma_mask:
- pci_clear_master(pdev);
- pci_release_regions(pdev);
-err_pci_regions:
- pci_disable_device(pdev);
-err_pci_enable:
- pci_set_drvdata(pdev, NULL);
- return rc;
-}
-
-static void intel_ntb_deinit_pci(struct intel_ntb_dev *ndev)
-{
- struct pci_dev *pdev = ndev->ntb.pdev;
-
- if (ndev->peer_mmio && ndev->peer_mmio != ndev->self_mmio)
- pci_iounmap(pdev, ndev->peer_mmio);
- pci_iounmap(pdev, ndev->self_mmio);
-
- pci_clear_master(pdev);
- pci_release_regions(pdev);
- pci_disable_device(pdev);
- pci_set_drvdata(pdev, NULL);
-}
-
-static inline void ndev_init_struct(struct intel_ntb_dev *ndev,
- struct pci_dev *pdev)
-{
- ndev->ntb.pdev = pdev;
- ndev->ntb.topo = NTB_TOPO_NONE;
- ndev->ntb.ops = &intel_ntb_ops;
-
- ndev->b2b_off = 0;
- ndev->b2b_idx = UINT_MAX;
-
- ndev->bar4_split = 0;
-
- ndev->mw_count = 0;
- ndev->spad_count = 0;
- ndev->db_count = 0;
- ndev->db_vec_count = 0;
- ndev->db_vec_shift = 0;
-
- ndev->ntb_ctl = 0;
- ndev->lnk_sta = 0;
-
- ndev->db_valid_mask = 0;
- ndev->db_link_mask = 0;
- ndev->db_mask = 0;
-
- spin_lock_init(&ndev->db_mask_lock);
-}
-
-static int intel_ntb_pci_probe(struct pci_dev *pdev,
- const struct pci_device_id *id)
-{
- struct intel_ntb_dev *ndev;
- int rc, node;
-
- node = dev_to_node(&pdev->dev);
-
- if (pdev_is_xeon(pdev)) {
- ndev = kzalloc_node(sizeof(*ndev), GFP_KERNEL, node);
- if (!ndev) {
- rc = -ENOMEM;
- goto err_ndev;
- }
-
- ndev_init_struct(ndev, pdev);
-
- rc = intel_ntb_init_pci(ndev, pdev);
- if (rc)
- goto err_init_pci;
-
- rc = xeon_init_dev(ndev);
- if (rc)
- goto err_init_dev;
-
- } else if (pdev_is_skx_xeon(pdev)) {
- ndev = kzalloc_node(sizeof(*ndev), GFP_KERNEL, node);
- if (!ndev) {
- rc = -ENOMEM;
- goto err_ndev;
- }
-
- ndev_init_struct(ndev, pdev);
- ndev->ntb.ops = &intel_ntb3_ops;
-
- rc = intel_ntb_init_pci(ndev, pdev);
- if (rc)
- goto err_init_pci;
-
- rc = skx_init_dev(ndev);
- if (rc)
- goto err_init_dev;
-
- } else {
- rc = -EINVAL;
- goto err_ndev;
- }
-
- ndev_reset_unsafe_flags(ndev);
-
- ndev->reg->poll_link(ndev);
-
- ndev_init_debugfs(ndev);
-
- rc = ntb_register_device(&ndev->ntb);
- if (rc)
- goto err_register;
-
- dev_info(&pdev->dev, "NTB device registered.\n");
-
- return 0;
-
-err_register:
- ndev_deinit_debugfs(ndev);
- if (pdev_is_xeon(pdev) || pdev_is_skx_xeon(pdev))
- xeon_deinit_dev(ndev);
-err_init_dev:
- intel_ntb_deinit_pci(ndev);
-err_init_pci:
- kfree(ndev);
-err_ndev:
- return rc;
-}
-
-static void intel_ntb_pci_remove(struct pci_dev *pdev)
-{
- struct intel_ntb_dev *ndev = pci_get_drvdata(pdev);
-
- ntb_unregister_device(&ndev->ntb);
- ndev_deinit_debugfs(ndev);
- if (pdev_is_xeon(pdev) || pdev_is_skx_xeon(pdev))
- xeon_deinit_dev(ndev);
- intel_ntb_deinit_pci(ndev);
- kfree(ndev);
-}
-
-static const struct intel_ntb_reg xeon_reg = {
- .poll_link = xeon_poll_link,
- .link_is_up = xeon_link_is_up,
- .db_ioread = xeon_db_ioread,
- .db_iowrite = xeon_db_iowrite,
- .db_size = sizeof(u32),
- .ntb_ctl = XEON_NTBCNTL_OFFSET,
- .mw_bar = {2, 4, 5},
-};
-
-static const struct intel_ntb_alt_reg xeon_pri_reg = {
- .db_bell = XEON_PDOORBELL_OFFSET,
- .db_mask = XEON_PDBMSK_OFFSET,
- .spad = XEON_SPAD_OFFSET,
-};
-
-static const struct intel_ntb_alt_reg xeon_sec_reg = {
- .db_bell = XEON_SDOORBELL_OFFSET,
- .db_mask = XEON_SDBMSK_OFFSET,
- /* second half of the scratchpads */
- .spad = XEON_SPAD_OFFSET + (XEON_SPAD_COUNT << 1),
-};
-
-static const struct intel_ntb_alt_reg xeon_b2b_reg = {
- .db_bell = XEON_B2B_DOORBELL_OFFSET,
- .spad = XEON_B2B_SPAD_OFFSET,
-};
-
-static const struct intel_ntb_xlat_reg xeon_pri_xlat = {
- /* Note: no primary .bar0_base visible to the secondary side.
- *
- * The secondary side cannot get the base address stored in primary
- * bars. The base address is necessary to set the limit register to
- * any value other than zero, or unlimited.
- *
- * WITHOUT THE BASE ADDRESS, THE SECONDARY SIDE CANNOT DISABLE the
- * window by setting the limit equal to base, nor can it limit the size
- * of the memory window by setting the limit to base + size.
- */
- .bar2_limit = XEON_PBAR23LMT_OFFSET,
- .bar2_xlat = XEON_PBAR23XLAT_OFFSET,
-};
-
-static const struct intel_ntb_xlat_reg xeon_sec_xlat = {
- .bar0_base = XEON_SBAR0BASE_OFFSET,
- .bar2_limit = XEON_SBAR23LMT_OFFSET,
- .bar2_xlat = XEON_SBAR23XLAT_OFFSET,
-};
-
-static struct intel_b2b_addr xeon_b2b_usd_addr = {
- .bar2_addr64 = XEON_B2B_BAR2_ADDR64,
- .bar4_addr64 = XEON_B2B_BAR4_ADDR64,
- .bar4_addr32 = XEON_B2B_BAR4_ADDR32,
- .bar5_addr32 = XEON_B2B_BAR5_ADDR32,
-};
-
-static struct intel_b2b_addr xeon_b2b_dsd_addr = {
- .bar2_addr64 = XEON_B2B_BAR2_ADDR64,
- .bar4_addr64 = XEON_B2B_BAR4_ADDR64,
- .bar4_addr32 = XEON_B2B_BAR4_ADDR32,
- .bar5_addr32 = XEON_B2B_BAR5_ADDR32,
-};
-
-static const struct intel_ntb_reg skx_reg = {
- .poll_link = skx_poll_link,
- .link_is_up = xeon_link_is_up,
- .db_ioread = skx_db_ioread,
- .db_iowrite = skx_db_iowrite,
- .db_size = sizeof(u32),
- .ntb_ctl = SKX_NTBCNTL_OFFSET,
- .mw_bar = {2, 4},
-};
-
-static const struct intel_ntb_alt_reg skx_pri_reg = {
- .db_bell = SKX_EM_DOORBELL_OFFSET,
- .db_clear = SKX_IM_INT_STATUS_OFFSET,
- .db_mask = SKX_IM_INT_DISABLE_OFFSET,
- .spad = SKX_IM_SPAD_OFFSET,
-};
-
-static const struct intel_ntb_alt_reg skx_b2b_reg = {
- .db_bell = SKX_IM_DOORBELL_OFFSET,
- .db_clear = SKX_EM_INT_STATUS_OFFSET,
- .db_mask = SKX_EM_INT_DISABLE_OFFSET,
- .spad = SKX_B2B_SPAD_OFFSET,
-};
-
-static const struct intel_ntb_xlat_reg skx_sec_xlat = {
-/* .bar0_base = SKX_EMBAR0_OFFSET, */
- .bar2_limit = SKX_IMBAR1XLMT_OFFSET,
- .bar2_xlat = SKX_IMBAR1XBASE_OFFSET,
-};
-
-/* operations for primary side of local ntb */
-static const struct ntb_dev_ops intel_ntb_ops = {
- .mw_count = intel_ntb_mw_count,
- .mw_get_align = intel_ntb_mw_get_align,
- .mw_set_trans = intel_ntb_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_ntb_link_enable,
- .link_disable = intel_ntb_link_disable,
- .db_is_unsafe = intel_ntb_db_is_unsafe,
- .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_ntb_db_read,
- .db_clear = intel_ntb_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_ntb_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,
-};
-
-static 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,
-};
-
-static const struct file_operations intel_ntb_debugfs_info = {
- .owner = THIS_MODULE,
- .open = simple_open,
- .read = ndev_debugfs_read,
-};
-
-static const struct pci_device_id intel_ntb_pci_tbl[] = {
- {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_B2B_JSF)},
- {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_B2B_SNB)},
- {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_B2B_IVT)},
- {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_B2B_HSX)},
- {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_B2B_BDX)},
- {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_PS_JSF)},
- {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_PS_SNB)},
- {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_PS_IVT)},
- {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_PS_HSX)},
- {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_PS_BDX)},
- {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_SS_JSF)},
- {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_SS_SNB)},
- {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_SS_IVT)},
- {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_SS_HSX)},
- {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_SS_BDX)},
- {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_B2B_SKX)},
- {0}
-};
-MODULE_DEVICE_TABLE(pci, intel_ntb_pci_tbl);
-
-static struct pci_driver intel_ntb_pci_driver = {
- .name = KBUILD_MODNAME,
- .id_table = intel_ntb_pci_tbl,
- .probe = intel_ntb_pci_probe,
- .remove = intel_ntb_pci_remove,
-};
-
-static int __init intel_ntb_pci_driver_init(void)
-{
- pr_info("%s %s\n", NTB_DESC, NTB_VER);
-
- if (debugfs_initialized())
- debugfs_dir = debugfs_create_dir(KBUILD_MODNAME, NULL);
-
- return pci_register_driver(&intel_ntb_pci_driver);
-}
-module_init(intel_ntb_pci_driver_init);
-
-static void __exit intel_ntb_pci_driver_exit(void)
-{
- pci_unregister_driver(&intel_ntb_pci_driver);
-
- debugfs_remove_recursive(debugfs_dir);
-}
-module_exit(intel_ntb_pci_driver_exit);
#define hb_ndev(__work) container_of(__work, struct intel_ntb_dev, \
hb_timer.work)
+static inline int pdev_is_xeon(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_skx_xeon(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
projects / linux-block.git / commitdiff