From: Dave Jiang Date: Thu, 28 Aug 2014 20:53:23 +0000 (-0700) Subject: ntb: Adding split BAR support for Haswell platforms X-Git-Tag: v3.18-rc1~3^2 X-Git-Url: https://git.kernelconcepts.de/?a=commitdiff_plain;h=ab760a0c5667519b375ea9c5ab3a23501c4817ef;p=karo-tx-linux.git ntb: Adding split BAR support for Haswell platforms On the Haswell platform, a split BAR option to allow creation of 2 32bit BARs (4 and 5) from the 64bit BAR 4. Adding support for this new option. Signed-off-by: Dave Jiang Signed-off-by: Jon Mason --- diff --git a/drivers/ntb/ntb_hw.c b/drivers/ntb/ntb_hw.c index 53b739df8cd5..cd29b1038c5e 100644 --- a/drivers/ntb/ntb_hw.c +++ b/drivers/ntb/ntb_hw.c @@ -84,8 +84,8 @@ static struct dentry *debugfs_dir; #define BWD_LINK_RECOVERY_TIME 500 -/* Translate memory window 0,1 to BAR 2,4 */ -#define MW_TO_BAR(mw) (mw * NTB_MAX_NUM_MW + 2) +/* Translate memory window 0,1,2 to BAR 2,4,5 */ +#define MW_TO_BAR(mw) (mw == 0 ? 2 : (mw == 1 ? 4 : 5)) static const struct pci_device_id ntb_pci_tbl[] = { {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_B2B_BWD)}, @@ -506,8 +506,14 @@ void ntb_set_mw_addr(struct ntb_device *ndev, unsigned int mw, u64 addr) case NTB_BAR_23: writeq(addr, ndev->reg_ofs.bar2_xlat); break; - case NTB_BAR_45: - writeq(addr, ndev->reg_ofs.bar4_xlat); + case NTB_BAR_4: + if (ndev->split_bar) + writel(addr, ndev->reg_ofs.bar4_xlat); + else + writeq(addr, ndev->reg_ofs.bar4_xlat); + break; + case NTB_BAR_5: + writel(addr, ndev->reg_ofs.bar5_xlat); break; } } @@ -729,6 +735,9 @@ static int ntb_xeon_setup(struct ntb_device *ndev) ndev->reg_ofs.spad_read = ndev->reg_base + SNB_SPAD_OFFSET; ndev->reg_ofs.bar2_xlat = ndev->reg_base + SNB_SBAR2XLAT_OFFSET; ndev->reg_ofs.bar4_xlat = ndev->reg_base + SNB_SBAR4XLAT_OFFSET; + if (ndev->split_bar) + ndev->reg_ofs.bar5_xlat = + ndev->reg_base + SNB_SBAR5XLAT_OFFSET; ndev->limits.max_spads = SNB_MAX_B2B_SPADS; /* There is a Xeon hardware errata related to writes to @@ -738,15 +747,16 @@ static int ntb_xeon_setup(struct ntb_device *ndev) * scratch pad registers on the remote system. */ if (ndev->wa_flags & WA_SNB_ERR) { - if (!ndev->mw[1].bar_sz) + if (!ndev->mw[ndev->limits.max_mw - 1].bar_sz) return -EINVAL; - ndev->limits.max_mw = SNB_ERRATA_MAX_MW; ndev->limits.max_db_bits = SNB_MAX_DB_BITS; - ndev->reg_ofs.spad_write = ndev->mw[1].vbase + - SNB_SPAD_OFFSET; - ndev->reg_ofs.rdb = ndev->mw[1].vbase + - SNB_PDOORBELL_OFFSET; + ndev->reg_ofs.spad_write = + ndev->mw[ndev->limits.max_mw - 1].vbase + + SNB_SPAD_OFFSET; + ndev->reg_ofs.rdb = + ndev->mw[ndev->limits.max_mw - 1].vbase + + SNB_PDOORBELL_OFFSET; /* Set the Limit register to 4k, the minimum size, to * prevent an illegal access @@ -759,9 +769,9 @@ static int ntb_xeon_setup(struct ntb_device *ndev) * the driver defaults, but write the Limit registers * first just in case. */ - } else { - ndev->limits.max_mw = SNB_MAX_MW; + ndev->limits.max_mw = SNB_ERRATA_MAX_MW; + } else { /* 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 @@ -774,7 +784,8 @@ static int ntb_xeon_setup(struct ntb_device *ndev) SNB_B2B_DOORBELL_OFFSET; /* Disable the Limit register, just incase it is set to - * something silly + * something silly. A 64bit write should handle it + * regardless of whether it has a split BAR or not. */ writeq(0, ndev->reg_base + SNB_PBAR4LMT_OFFSET); /* HW errata on the Limit registers. They can only be @@ -783,6 +794,10 @@ static int ntb_xeon_setup(struct ntb_device *ndev) * the driver defaults, but write the Limit registers * first just in case. */ + if (ndev->split_bar) + ndev->limits.max_mw = HSX_SPLITBAR_MAX_MW; + else + ndev->limits.max_mw = SNB_MAX_MW; } /* The Xeon errata workaround requires setting SBAR Base @@ -796,8 +811,18 @@ static int ntb_xeon_setup(struct ntb_device *ndev) writeq(SNB_MBAR01_DSD_ADDR, ndev->reg_base + SNB_PBAR4XLAT_OFFSET); else { - writeq(SNB_MBAR45_DSD_ADDR, ndev->reg_base + - SNB_PBAR4XLAT_OFFSET); + if (ndev->split_bar) { + writel(SNB_MBAR4_DSD_ADDR, + ndev->reg_base + + SNB_PBAR4XLAT_OFFSET); + writel(SNB_MBAR5_DSD_ADDR, + ndev->reg_base + + SNB_PBAR5XLAT_OFFSET); + } else + writeq(SNB_MBAR4_DSD_ADDR, + ndev->reg_base + + SNB_PBAR4XLAT_OFFSET); + /* B2B_XLAT_OFFSET is a 64bit register, but can * only take 32bit writes */ @@ -811,8 +836,14 @@ static int ntb_xeon_setup(struct ntb_device *ndev) SNB_SBAR0BASE_OFFSET); writeq(SNB_MBAR23_USD_ADDR, ndev->reg_base + SNB_SBAR2BASE_OFFSET); - writeq(SNB_MBAR45_USD_ADDR, ndev->reg_base + - SNB_SBAR4BASE_OFFSET); + if (ndev->split_bar) { + writel(SNB_MBAR4_USD_ADDR, ndev->reg_base + + SNB_SBAR4BASE_OFFSET); + writel(SNB_MBAR5_USD_ADDR, ndev->reg_base + + SNB_SBAR5BASE_OFFSET); + } else + writeq(SNB_MBAR4_USD_ADDR, ndev->reg_base + + SNB_SBAR4BASE_OFFSET); } else { writeq(SNB_MBAR23_USD_ADDR, ndev->reg_base + SNB_PBAR2XLAT_OFFSET); @@ -820,9 +851,20 @@ static int ntb_xeon_setup(struct ntb_device *ndev) writeq(SNB_MBAR01_USD_ADDR, ndev->reg_base + SNB_PBAR4XLAT_OFFSET); else { - writeq(SNB_MBAR45_USD_ADDR, ndev->reg_base + - SNB_PBAR4XLAT_OFFSET); - /* B2B_XLAT_OFFSET is a 64bit register, but can + if (ndev->split_bar) { + writel(SNB_MBAR4_USD_ADDR, + ndev->reg_base + + SNB_PBAR4XLAT_OFFSET); + writel(SNB_MBAR5_USD_ADDR, + ndev->reg_base + + SNB_PBAR5XLAT_OFFSET); + } else + writeq(SNB_MBAR4_USD_ADDR, + ndev->reg_base + + SNB_PBAR4XLAT_OFFSET); + + /* + * B2B_XLAT_OFFSET is a 64bit register, but can * only take 32bit writes */ writel(SNB_MBAR01_USD_ADDR & 0xffffffff, @@ -834,8 +876,15 @@ static int ntb_xeon_setup(struct ntb_device *ndev) SNB_SBAR0BASE_OFFSET); writeq(SNB_MBAR23_DSD_ADDR, ndev->reg_base + SNB_SBAR2BASE_OFFSET); - writeq(SNB_MBAR45_DSD_ADDR, ndev->reg_base + - SNB_SBAR4BASE_OFFSET); + if (ndev->split_bar) { + writel(SNB_MBAR4_DSD_ADDR, ndev->reg_base + + SNB_SBAR4BASE_OFFSET); + writel(SNB_MBAR5_DSD_ADDR, ndev->reg_base + + SNB_SBAR5BASE_OFFSET); + } else + writeq(SNB_MBAR4_DSD_ADDR, ndev->reg_base + + SNB_SBAR4BASE_OFFSET); + } break; case NTB_CONN_RP: @@ -865,7 +914,12 @@ static int ntb_xeon_setup(struct ntb_device *ndev) ndev->reg_ofs.spad_read = ndev->reg_base + SNB_SPAD_OFFSET; ndev->reg_ofs.bar2_xlat = ndev->reg_base + SNB_SBAR2XLAT_OFFSET; ndev->reg_ofs.bar4_xlat = ndev->reg_base + SNB_SBAR4XLAT_OFFSET; - ndev->limits.max_mw = SNB_MAX_MW; + if (ndev->split_bar) { + ndev->reg_ofs.bar5_xlat = + ndev->reg_base + SNB_SBAR5XLAT_OFFSET; + ndev->limits.max_mw = HSX_SPLITBAR_MAX_MW; + } else + ndev->limits.max_mw = SNB_MAX_MW; break; case NTB_CONN_TRANSPARENT: if (ndev->wa_flags & WA_SNB_ERR) { @@ -892,7 +946,12 @@ static int ntb_xeon_setup(struct ntb_device *ndev) ndev->reg_ofs.bar2_xlat = ndev->reg_base + SNB_PBAR2XLAT_OFFSET; ndev->reg_ofs.bar4_xlat = ndev->reg_base + SNB_PBAR4XLAT_OFFSET; - ndev->limits.max_mw = SNB_MAX_MW; + if (ndev->split_bar) { + ndev->reg_ofs.bar5_xlat = + ndev->reg_base + SNB_PBAR5XLAT_OFFSET; + ndev->limits.max_mw = HSX_SPLITBAR_MAX_MW; + } else + ndev->limits.max_mw = SNB_MAX_MW; break; default: /* @@ -1499,7 +1558,11 @@ static void ntb_hw_link_up(struct ntb_device *ndev) ntb_cntl = readl(ndev->reg_ofs.lnk_cntl); ntb_cntl &= ~(NTB_CNTL_LINK_DISABLE | NTB_CNTL_CFG_LOCK); ntb_cntl |= NTB_CNTL_P2S_BAR23_SNOOP | NTB_CNTL_S2P_BAR23_SNOOP; - ntb_cntl |= NTB_CNTL_P2S_BAR45_SNOOP | NTB_CNTL_S2P_BAR45_SNOOP; + ntb_cntl |= NTB_CNTL_P2S_BAR4_SNOOP | NTB_CNTL_S2P_BAR4_SNOOP; + if (ndev->split_bar) + ntb_cntl |= NTB_CNTL_P2S_BAR5_SNOOP | + NTB_CNTL_S2P_BAR5_SNOOP; + writel(ntb_cntl, ndev->reg_ofs.lnk_cntl); } } @@ -1516,14 +1579,26 @@ static void ntb_hw_link_down(struct ntb_device *ndev) /* Bring NTB link down */ ntb_cntl = readl(ndev->reg_ofs.lnk_cntl); ntb_cntl &= ~(NTB_CNTL_P2S_BAR23_SNOOP | NTB_CNTL_S2P_BAR23_SNOOP); - ntb_cntl &= ~(NTB_CNTL_P2S_BAR45_SNOOP | NTB_CNTL_S2P_BAR45_SNOOP); + ntb_cntl &= ~(NTB_CNTL_P2S_BAR4_SNOOP | NTB_CNTL_S2P_BAR4_SNOOP); + if (ndev->split_bar) + ntb_cntl &= ~(NTB_CNTL_P2S_BAR5_SNOOP | + NTB_CNTL_S2P_BAR5_SNOOP); ntb_cntl |= NTB_CNTL_LINK_DISABLE | NTB_CNTL_CFG_LOCK; writel(ntb_cntl, ndev->reg_ofs.lnk_cntl); } +static void ntb_max_mw_detect(struct ntb_device *ndev) +{ + if (ndev->split_bar) + ndev->limits.max_mw = HSX_SPLITBAR_MAX_MW; + else + ndev->limits.max_mw = SNB_MAX_MW; +} + static int ntb_xeon_detect(struct ntb_device *ndev) { - int rc; + int rc, bars_mask; + u32 bars; u8 ppd; ndev->hw_type = SNB_HW; @@ -1537,6 +1612,8 @@ static int ntb_xeon_detect(struct ntb_device *ndev) else ndev->dev_type = NTB_DEV_DSD; + ndev->split_bar = (ppd & SNB_PPD_SPLIT_BAR) ? 1 : 0; + switch (ppd & SNB_PPD_CONN_TYPE) { case NTB_CONN_B2B: dev_info(&ndev->pdev->dev, "Conn Type = B2B\n"); @@ -1555,12 +1632,25 @@ static int ntb_xeon_detect(struct ntb_device *ndev) * NTB. We will just force correct here. */ ndev->dev_type = NTB_DEV_USD; + + /* + * 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. + */ + bars_mask = pci_select_bars(ndev->pdev, IORESOURCE_MEM); + bars = hweight32(bars_mask); + if (bars == (HSX_SPLITBAR_MAX_MW + 1)) + ndev->split_bar = 1; + break; default: dev_err(&ndev->pdev->dev, "Unknown PPD %x\n", ppd); return -ENODEV; } + ntb_max_mw_detect(ndev); + return 0; } @@ -1638,22 +1728,50 @@ static int ntb_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) if (rc) goto err; - rc = pci_request_selected_regions(pdev, NTB_BAR_MASK, KBUILD_MODNAME); - if (rc) + ndev->mw = kcalloc(ndev->limits.max_mw, sizeof(struct ntb_mw), + GFP_KERNEL); + if (!ndev->mw) { + rc = -ENOMEM; goto err1; + } + + if (ndev->split_bar) + rc = pci_request_selected_regions(pdev, NTB_SPLITBAR_MASK, + KBUILD_MODNAME); + else + rc = pci_request_selected_regions(pdev, NTB_BAR_MASK, + KBUILD_MODNAME); + + if (rc) + goto err2; ndev->reg_base = pci_ioremap_bar(pdev, NTB_BAR_MMIO); if (!ndev->reg_base) { dev_warn(&pdev->dev, "Cannot remap BAR 0\n"); rc = -EIO; - goto err2; + goto err3; } - for (i = 0; i < NTB_MAX_NUM_MW; i++) { + for (i = 0; i < ndev->limits.max_mw; i++) { ndev->mw[i].bar_sz = pci_resource_len(pdev, MW_TO_BAR(i)); - ndev->mw[i].vbase = - ioremap_wc(pci_resource_start(pdev, MW_TO_BAR(i)), - ndev->mw[i].bar_sz); + + /* + * with the errata we need to steal last of the memory + * windows for workarounds and they point to MMIO registers. + */ + if ((ndev->wa_flags & WA_SNB_ERR) && + (i == (ndev->limits.max_mw - 1))) { + ndev->mw[i].vbase = + ioremap_nocache(pci_resource_start(pdev, + MW_TO_BAR(i)), + ndev->mw[i].bar_sz); + } else { + ndev->mw[i].vbase = + ioremap_wc(pci_resource_start(pdev, + MW_TO_BAR(i)), + ndev->mw[i].bar_sz); + } + dev_info(&pdev->dev, "MW %d size %llu\n", i, (unsigned long long) ndev->mw[i].bar_sz); if (!ndev->mw[i].vbase) { @@ -1668,7 +1786,7 @@ static int ntb_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) if (rc) { rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); if (rc) - goto err3; + goto err4; dev_warn(&pdev->dev, "Cannot DMA highmem\n"); } @@ -1677,22 +1795,22 @@ static int ntb_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) if (rc) { rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); if (rc) - goto err3; + goto err4; dev_warn(&pdev->dev, "Cannot DMA consistent highmem\n"); } rc = ntb_device_setup(ndev); if (rc) - goto err3; + goto err4; rc = ntb_create_callbacks(ndev); if (rc) - goto err4; + goto err5; rc = ntb_setup_interrupts(ndev); if (rc) - goto err5; + goto err6; /* The scratchpad registers keep the values between rmmod/insmod, * blast them now @@ -1704,24 +1822,29 @@ static int ntb_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) rc = ntb_transport_init(pdev); if (rc) - goto err6; + goto err7; ntb_hw_link_up(ndev); return 0; -err6: +err7: ntb_free_interrupts(ndev); -err5: +err6: ntb_free_callbacks(ndev); -err4: +err5: ntb_device_free(ndev); -err3: +err4: for (i--; i >= 0; i--) iounmap(ndev->mw[i].vbase); iounmap(ndev->reg_base); +err3: + if (ndev->split_bar) + pci_release_selected_regions(pdev, NTB_SPLITBAR_MASK); + else + pci_release_selected_regions(pdev, NTB_BAR_MASK); err2: - pci_release_selected_regions(pdev, NTB_BAR_MASK); + kfree(ndev->mw); err1: pci_disable_device(pdev); err: @@ -1745,11 +1868,19 @@ static void ntb_pci_remove(struct pci_dev *pdev) ntb_free_callbacks(ndev); ntb_device_free(ndev); - for (i = 0; i < NTB_MAX_NUM_MW; i++) + /* need to reset max_mw limits so we can unmap properly */ + if (ndev->hw_type == SNB_HW) + ntb_max_mw_detect(ndev); + + for (i = 0; i < ndev->limits.max_mw; i++) iounmap(ndev->mw[i].vbase); + kfree(ndev->mw); iounmap(ndev->reg_base); - pci_release_selected_regions(pdev, NTB_BAR_MASK); + if (ndev->split_bar) + pci_release_selected_regions(pdev, NTB_SPLITBAR_MASK); + else + pci_release_selected_regions(pdev, NTB_BAR_MASK); pci_disable_device(pdev); ntb_free_debugfs(ndev); kfree(ndev); diff --git a/drivers/ntb/ntb_hw.h b/drivers/ntb/ntb_hw.h index 5380ca16198a..96de5fc95f90 100644 --- a/drivers/ntb/ntb_hw.h +++ b/drivers/ntb/ntb_hw.h @@ -78,14 +78,16 @@ static inline void writeq(u64 val, void __iomem *addr) #define NTB_BAR_MMIO 0 #define NTB_BAR_23 2 -#define NTB_BAR_45 4 +#define NTB_BAR_4 4 +#define NTB_BAR_5 5 + #define NTB_BAR_MASK ((1 << NTB_BAR_MMIO) | (1 << NTB_BAR_23) |\ - (1 << NTB_BAR_45)) + (1 << NTB_BAR_4)) +#define NTB_SPLITBAR_MASK ((1 << NTB_BAR_MMIO) | (1 << NTB_BAR_23) |\ + (1 << NTB_BAR_4) | (1 << NTB_BAR_5)) #define NTB_HB_TIMEOUT msecs_to_jiffies(1000) -#define NTB_MAX_NUM_MW 2 - enum ntb_hw_event { NTB_EVENT_SW_EVENT0 = 0, NTB_EVENT_SW_EVENT1, @@ -115,7 +117,7 @@ struct ntb_device { struct pci_dev *pdev; struct msix_entry *msix_entries; void __iomem *reg_base; - struct ntb_mw mw[NTB_MAX_NUM_MW]; + struct ntb_mw *mw; struct { unsigned char max_mw; unsigned char max_spads; @@ -128,6 +130,7 @@ struct ntb_device { void __iomem *rdb; void __iomem *bar2_xlat; void __iomem *bar4_xlat; + void __iomem *bar5_xlat; void __iomem *spad_write; void __iomem *spad_read; void __iomem *lnk_cntl; @@ -147,6 +150,7 @@ struct ntb_device { unsigned char link_width; unsigned char link_speed; unsigned char link_status; + unsigned char split_bar; struct delayed_work hb_timer; unsigned long last_ts; diff --git a/drivers/ntb/ntb_regs.h b/drivers/ntb/ntb_regs.h index 07872057c76e..f028ff81fd77 100644 --- a/drivers/ntb/ntb_regs.h +++ b/drivers/ntb/ntb_regs.h @@ -57,6 +57,7 @@ #define SNB_MAX_DB_BITS 15 #define SNB_LINK_DB 15 #define SNB_DB_BITS_PER_VEC 5 +#define HSX_SPLITBAR_MAX_MW 3 #define SNB_MAX_MW 2 #define SNB_ERRATA_MAX_MW 1 @@ -72,15 +73,20 @@ #define SNB_PBAR2LMT_OFFSET 0x0000 #define SNB_PBAR4LMT_OFFSET 0x0008 +#define SNB_PBAR5LMT_OFFSET 0x000C #define SNB_PBAR2XLAT_OFFSET 0x0010 #define SNB_PBAR4XLAT_OFFSET 0x0018 +#define SNB_PBAR5XLAT_OFFSET 0x001C #define SNB_SBAR2LMT_OFFSET 0x0020 #define SNB_SBAR4LMT_OFFSET 0x0028 +#define SNB_SBAR5LMT_OFFSET 0x002C #define SNB_SBAR2XLAT_OFFSET 0x0030 #define SNB_SBAR4XLAT_OFFSET 0x0038 +#define SNB_SBAR5XLAT_OFFSET 0x003C #define SNB_SBAR0BASE_OFFSET 0x0040 #define SNB_SBAR2BASE_OFFSET 0x0048 #define SNB_SBAR4BASE_OFFSET 0x0050 +#define SNB_SBAR5BASE_OFFSET 0x0054 #define SNB_NTBCNTL_OFFSET 0x0058 #define SNB_SBDF_OFFSET 0x005C #define SNB_PDOORBELL_OFFSET 0x0060 @@ -96,12 +102,18 @@ #define SNB_B2B_XLAT_OFFSETL 0x0144 #define SNB_B2B_XLAT_OFFSETU 0x0148 -#define SNB_MBAR01_USD_ADDR 0x000000210000000CULL -#define SNB_MBAR23_USD_ADDR 0x000000410000000CULL -#define SNB_MBAR45_USD_ADDR 0x000000810000000CULL -#define SNB_MBAR01_DSD_ADDR 0x000000200000000CULL -#define SNB_MBAR23_DSD_ADDR 0x000000400000000CULL -#define SNB_MBAR45_DSD_ADDR 0x000000800000000CULL +/* + * The addresses are setup so the 32bit BARs can function. Thus + * the addresses are all in 32bit space + */ +#define SNB_MBAR01_USD_ADDR 0x000000002100000CULL +#define SNB_MBAR23_USD_ADDR 0x000000004100000CULL +#define SNB_MBAR4_USD_ADDR 0x000000008100000CULL +#define SNB_MBAR5_USD_ADDR 0x00000000A100000CULL +#define SNB_MBAR01_DSD_ADDR 0x000000002000000CULL +#define SNB_MBAR23_DSD_ADDR 0x000000004000000CULL +#define SNB_MBAR4_DSD_ADDR 0x000000008000000CULL +#define SNB_MBAR5_DSD_ADDR 0x00000000A000000CULL #define BWD_MSIX_CNT 34 #define BWD_MAX_SPADS 16 @@ -150,13 +162,16 @@ #define NTB_CNTL_LINK_DISABLE (1 << 1) #define NTB_CNTL_S2P_BAR23_SNOOP (1 << 2) #define NTB_CNTL_P2S_BAR23_SNOOP (1 << 4) -#define NTB_CNTL_S2P_BAR45_SNOOP (1 << 6) -#define NTB_CNTL_P2S_BAR45_SNOOP (1 << 8) +#define NTB_CNTL_S2P_BAR4_SNOOP (1 << 6) +#define NTB_CNTL_P2S_BAR4_SNOOP (1 << 8) +#define NTB_CNTL_S2P_BAR5_SNOOP (1 << 12) +#define NTB_CNTL_P2S_BAR5_SNOOP (1 << 14) #define BWD_CNTL_LINK_DOWN (1 << 16) #define NTB_PPD_OFFSET 0x00D4 #define SNB_PPD_CONN_TYPE 0x0003 #define SNB_PPD_DEV_TYPE 0x0010 +#define SNB_PPD_SPLIT_BAR (1 << 6) #define BWD_PPD_INIT_LINK 0x0008 #define BWD_PPD_CONN_TYPE 0x0300 #define BWD_PPD_DEV_TYPE 0x1000