ntb: intel: split out the gen3 code

Move the Intel hw gen3 code to its own source file. The ntb_hw_intel.c was
getting too large and makes it hard to maintain with future hardware
changes.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>

drivers/ntb/hw/intel/Makefile

@@ -1 +1,2 @@
 obj-$(CONFIG_NTB_INTEL) += ntb_hw_intel.o
+ntb_hw_intel-y := ntb_hw_gen1.o ntb_hw_gen3.o

drivers/ntb/hw/intel/ntb_hw_intel.c → drivers/ntb/hw/intel/ntb_hw_gen1.c

@@ -60,9 +60,9 @@
 #include <linux/slab.h>
 #include <linux/ntb.h>
 
+#include "ntb_hw_intel.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"
@@ -82,14 +82,7 @@ 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;
@@ -148,68 +141,8 @@ module_param_named(xeon_b2b_dsd_bar5_addr32,
 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 int xeon_init_isr(struct intel_ntb_dev *ndev);
 
 static inline void ndev_reset_unsafe_flags(struct intel_ntb_dev *ndev)
 {
@@ -243,7 +176,7 @@ static inline int ndev_ignore_unsafe(struct intel_ntb_dev *ndev,
 	return !!flag;
 }
 
-static int ndev_mw_to_bar(struct intel_ntb_dev *ndev, int idx)
+int ndev_mw_to_bar(struct intel_ntb_dev *ndev, int idx)
 {
 	if (idx < 0 || idx >= ndev->mw_count)
 		return -EINVAL;
@@ -270,7 +203,7 @@ static inline int ndev_db_addr(struct intel_ntb_dev *ndev,
 	return 0;
 }
 
-static inline u64 ndev_db_read(struct intel_ntb_dev *ndev,
+u64 ndev_db_read(struct intel_ntb_dev *ndev,
 			       void __iomem *mmio)
 {
 	if (ndev_is_unsafe(ndev, NTB_UNSAFE_DB))
@@ -279,7 +212,7 @@ static inline u64 ndev_db_read(struct intel_ntb_dev *ndev,
 	return ndev->reg->db_ioread(mmio);
 }
 
-static inline int ndev_db_write(struct intel_ntb_dev *ndev, u64 db_bits,
+int ndev_db_write(struct intel_ntb_dev *ndev, u64 db_bits,
 				void __iomem *mmio)
 {
 	if (ndev_is_unsafe(ndev, NTB_UNSAFE_DB))
@@ -431,7 +364,7 @@ static irqreturn_t ndev_irq_isr(int irq, void *dev)
 	return ndev_interrupt(ndev, irq - ndev->ntb.pdev->irq);
 }
 
-static int ndev_init_isr(struct intel_ntb_dev *ndev,
+int ndev_init_isr(struct intel_ntb_dev *ndev,
 			 int msix_min, int msix_max,
 			 int msix_shift, int total_shift)
 {
@@ -559,169 +492,6 @@ static void ndev_deinit_isr(struct intel_ntb_dev *ndev)
 	}
 }
 
-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)
 {
@@ -1025,7 +795,7 @@ 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)
+int intel_ntb_mw_count(struct ntb_dev *ntb, int pidx)
 {
 	if (pidx != NTB_DEF_PEER_IDX)
 		return -EINVAL;
@@ -1033,10 +803,10 @@ static int intel_ntb_mw_count(struct ntb_dev *ntb, int pidx)
 	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)
+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;
@@ -1172,9 +942,8 @@ static int intel_ntb_mw_set_trans(struct ntb_dev *ntb, int pidx, int idx,
 	return 0;
 }
 
-static u64 intel_ntb_link_is_up(struct ntb_dev *ntb,
-				enum ntb_speed *speed,
-				enum ntb_width *width)
+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);
 
@@ -1226,7 +995,7 @@ static int intel_ntb_link_enable(struct ntb_dev *ntb,
 	return 0;
 }
 
-static int intel_ntb_link_disable(struct ntb_dev *ntb)
+int intel_ntb_link_disable(struct ntb_dev *ntb)
 {
 	struct intel_ntb_dev *ndev;
 	u32 ntb_cntl;
@@ -1250,14 +1019,14 @@ static int intel_ntb_link_disable(struct ntb_dev *ntb)
 	return 0;
 }
 
-static int intel_ntb_peer_mw_count(struct ntb_dev *ntb)
+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)
+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;
@@ -1285,12 +1054,12 @@ 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)
+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)
+int intel_ntb_db_vector_count(struct ntb_dev *ntb)
 {
 	struct intel_ntb_dev *ndev;
 
@@ -1299,7 +1068,7 @@ static int intel_ntb_db_vector_count(struct ntb_dev *ntb)
 	return ndev->db_vec_count;
 }
 
-static u64 intel_ntb_db_vector_mask(struct ntb_dev *ntb, int db_vector)
+u64 intel_ntb_db_vector_mask(struct ntb_dev *ntb, int db_vector)
 {
 	struct intel_ntb_dev *ndev = ntb_ndev(ntb);
 
@@ -1327,7 +1096,7 @@ static int intel_ntb_db_clear(struct ntb_dev *ntb, u64 db_bits)
 			     ndev->self_reg->db_bell);
 }
 
-static int intel_ntb_db_set_mask(struct ntb_dev *ntb, u64 db_bits)
+int intel_ntb_db_set_mask(struct ntb_dev *ntb, u64 db_bits)
 {
 	struct intel_ntb_dev *ndev = ntb_ndev(ntb);
 
@@ -1336,7 +1105,7 @@ static int intel_ntb_db_set_mask(struct ntb_dev *ntb, u64 db_bits)
 				ndev->self_reg->db_mask);
 }
 
-static int intel_ntb_db_clear_mask(struct ntb_dev *ntb, u64 db_bits)
+int intel_ntb_db_clear_mask(struct ntb_dev *ntb, u64 db_bits)
 {
 	struct intel_ntb_dev *ndev = ntb_ndev(ntb);
 
@@ -1345,9 +1114,8 @@ static int intel_ntb_db_clear_mask(struct ntb_dev *ntb, u64 db_bits)
 				  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)
+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);
 
@@ -1364,12 +1132,12 @@ static int intel_ntb_peer_db_set(struct ntb_dev *ntb, u64 db_bits)
 			     ndev->peer_reg->db_bell);
 }
 
-static int intel_ntb_spad_is_unsafe(struct ntb_dev *ntb)
+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)
+int intel_ntb_spad_count(struct ntb_dev *ntb)
 {
 	struct intel_ntb_dev *ndev;
 
@@ -1378,7 +1146,7 @@ static int intel_ntb_spad_count(struct ntb_dev *ntb)
 	return ndev->spad_count;
 }
 
-static u32 intel_ntb_spad_read(struct ntb_dev *ntb, int idx)
+u32 intel_ntb_spad_read(struct ntb_dev *ntb, int idx)
 {
 	struct intel_ntb_dev *ndev = ntb_ndev(ntb);
 
@@ -1387,8 +1155,7 @@ static u32 intel_ntb_spad_read(struct ntb_dev *ntb, int idx)
 			      ndev->self_reg->spad);
 }
 
-static int intel_ntb_spad_write(struct ntb_dev *ntb,
-				int idx, u32 val)
+int intel_ntb_spad_write(struct ntb_dev *ntb, int idx, u32 val)
 {
 	struct intel_ntb_dev *ndev = ntb_ndev(ntb);
 
@@ -1397,8 +1164,8 @@ static int intel_ntb_spad_write(struct ntb_dev *ntb,
 			       ndev->self_reg->spad);
 }
 
-static int intel_ntb_peer_spad_addr(struct ntb_dev *ntb, int pidx, int sidx,
-				    phys_addr_t *spad_addr)
+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);
 
@@ -1406,7 +1173,7 @@ static int intel_ntb_peer_spad_addr(struct ntb_dev *ntb, int pidx, int sidx,
 			      ndev->peer_reg->spad);
 }
 
-static u32 intel_ntb_peer_spad_read(struct ntb_dev *ntb, int pidx, int sidx)
+u32 intel_ntb_peer_spad_read(struct ntb_dev *ntb, int pidx, int sidx)
 {
 	struct intel_ntb_dev *ndev = ntb_ndev(ntb);
 
@@ -1415,8 +1182,8 @@ static u32 intel_ntb_peer_spad_read(struct ntb_dev *ntb, int pidx, int sidx)
 			      ndev->peer_reg->spad);
 }
 
-static int intel_ntb_peer_spad_write(struct ntb_dev *ntb, int pidx,
-				     int sidx, u32 val)
+int intel_ntb_peer_spad_write(struct ntb_dev *ntb, int pidx, int sidx,
+			      u32 val)
 {
 	struct intel_ntb_dev *ndev = ntb_ndev(ntb);
 
@@ -1425,336 +1192,6 @@ static int intel_ntb_peer_spad_write(struct ntb_dev *ntb, int pidx,
 			       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, &reg_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);
@@ -1787,7 +1224,7 @@ static int xeon_poll_link(struct intel_ntb_dev *ndev)
 	return 1;
 }
 
-static int xeon_link_is_up(struct intel_ntb_dev *ndev)
+int xeon_link_is_up(struct intel_ntb_dev *ndev)
 {
 	if (ndev->ntb.topo == NTB_TOPO_SEC)
 		return 1;
@@ -1795,7 +1232,7 @@ static int xeon_link_is_up(struct intel_ntb_dev *ndev)
 	return NTB_LNK_STA_ACTIVE(ndev->lnk_sta);
 }
 
-static inline enum ntb_topo xeon_ppd_topo(struct intel_ntb_dev *ndev, u8 ppd)
+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:
@@ -2539,50 +1976,20 @@ static const struct intel_ntb_xlat_reg xeon_sec_xlat = {
 	.bar2_xlat		= XEON_SBAR23XLAT_OFFSET,
 };
 
-static struct intel_b2b_addr xeon_b2b_usd_addr = {
+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 = {
+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,
@@ -2612,33 +2019,6 @@ static const struct ntb_dev_ops intel_ntb_ops = {
 	.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,

drivers/ntb/hw/intel/ntb_hw_gen1.h

@@ -44,6 +44,8 @@
 #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
@@ -139,4 +141,42 @@
 #define NTB_HWERR_B2BDOORBELL_BIT14	BIT_ULL(2)
 #define NTB_HWERR_MSIX_VECTOR32_BAD	BIT_ULL(3)
 
+extern struct intel_b2b_addr xeon_b2b_usd_addr;
+extern struct intel_b2b_addr xeon_b2b_dsd_addr;
+
+int ndev_init_isr(struct intel_ntb_dev *ndev, int msix_min, int msix_max,
+		int msix_shift, int total_shift);
+enum ntb_topo xeon_ppd_topo(struct intel_ntb_dev *ndev, u8 ppd);
+u64 ndev_db_read(struct intel_ntb_dev *ndev, void __iomem *mmio);
+int ndev_db_write(struct intel_ntb_dev *ndev, u64 db_bits,
+				void __iomem *mmio);
+int ndev_mw_to_bar(struct intel_ntb_dev *ndev, int idx);
+int intel_ntb_mw_count(struct ntb_dev *ntb, int pidx);
+int intel_ntb_mw_get_align(struct ntb_dev *ntb, int pidx, int idx,
+		resource_size_t *addr_align, resource_size_t *size_align,
+		resource_size_t *size_max);
+int intel_ntb_peer_mw_count(struct ntb_dev *ntb);
+int intel_ntb_peer_mw_get_addr(struct ntb_dev *ntb, int idx,
+		phys_addr_t *base, resource_size_t *size);
+u64 intel_ntb_link_is_up(struct ntb_dev *ntb, enum ntb_speed *speed,
+		enum ntb_width *width);
+int intel_ntb_link_disable(struct ntb_dev *ntb);
+u64 intel_ntb_db_valid_mask(struct ntb_dev *ntb);
+int intel_ntb_db_vector_count(struct ntb_dev *ntb);
+u64 intel_ntb_db_vector_mask(struct ntb_dev *ntb, int db_vector);
+int intel_ntb_db_set_mask(struct ntb_dev *ntb, u64 db_bits);
+int intel_ntb_db_clear_mask(struct ntb_dev *ntb, u64 db_bits);
+int intel_ntb_peer_db_addr(struct ntb_dev *ntb, phys_addr_t *db_addr,
+		resource_size_t *db_size);
+int intel_ntb_spad_is_unsafe(struct ntb_dev *ntb);
+int intel_ntb_spad_count(struct ntb_dev *ntb);
+u32 intel_ntb_spad_read(struct ntb_dev *ntb, int idx);
+int intel_ntb_spad_write(struct ntb_dev *ntb, int idx, u32 val);
+u32 intel_ntb_peer_spad_read(struct ntb_dev *ntb, int pidx, int sidx);
+int intel_ntb_peer_spad_write(struct ntb_dev *ntb, int pidx, int sidx,
+		u32 val);
+int intel_ntb_peer_spad_addr(struct ntb_dev *ntb, int pidx, int sidx,
+				    phys_addr_t *spad_addr);
+int xeon_link_is_up(struct intel_ntb_dev *ndev);
+
 #endif

drivers/ntb/hw/intel/ntb_hw_gen3.c

@@ -0,0 +1,597 @@
+/*
+ * 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, &reg_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,
+};
+

drivers/ntb/hw/intel/ntb_hw_gen3.h

@@ -44,6 +44,8 @@
 #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
@@ -89,4 +91,21 @@
 #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

drivers/ntb/hw/intel/ntb_hw_intel.h

@@ -187,4 +187,64 @@ struct intel_ntb_dev {
 #define hb_ndev(__work) container_of(__work, struct intel_ntb_dev, \
 				     hb_timer.work)
 
+static inline int pdev_is_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