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-rw-r--r--drivers/ntb/hw/intel/ntb_hw_intel.c660
-rw-r--r--drivers/ntb/hw/intel/ntb_hw_intel.h48
2 files changed, 703 insertions, 5 deletions
diff --git a/drivers/ntb/hw/intel/ntb_hw_intel.c b/drivers/ntb/hw/intel/ntb_hw_intel.c
index 7310a261c858..d2ce28008fee 100644
--- a/drivers/ntb/hw/intel/ntb_hw_intel.c
+++ b/drivers/ntb/hw/intel/ntb_hw_intel.c
@@ -86,7 +86,12 @@ 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;
@@ -145,6 +150,9 @@ 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
@@ -206,6 +214,14 @@ static inline int pdev_is_xeon(struct pci_dev *pdev)
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;
@@ -390,6 +406,9 @@ static irqreturn_t ndev_interrupt(struct intel_ntb_dev *ndev, int vec)
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_dev(ndev), "vec %d vec_mask %llx\n", vec, vec_mask);
ndev->last_ts = jiffies;
@@ -409,6 +428,9 @@ static irqreturn_t ndev_vec_isr(int irq, void *dev)
{
struct intel_ntb_vec *nvec = dev;
+ dev_dbg(ndev_dev(nvec->ndev), "irq: %d nvec->num: %d\n",
+ irq, nvec->num);
+
return ndev_interrupt(nvec->ndev, nvec->num);
}
@@ -465,7 +487,7 @@ static int ndev_init_isr(struct intel_ntb_dev *ndev,
goto err_msix_request;
}
- dev_dbg(ndev_dev(ndev), "Using msix interrupts\n");
+ dev_dbg(ndev_dev(ndev), "Using %d msix interrupts\n", msix_count);
ndev->db_vec_count = msix_count;
ndev->db_vec_shift = msix_shift;
return 0;
@@ -547,8 +569,171 @@ static void ndev_deinit_isr(struct intel_ntb_dev *ndev)
}
}
-static ssize_t ndev_debugfs_read(struct file *filp, char __user *ubuf,
- size_t count, loff_t *offp)
+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;
@@ -813,6 +998,20 @@ static ssize_t ndev_debugfs_read(struct file *filp, char __user *ubuf,
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) ||
+ pdev_is_atom(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) {
@@ -1428,6 +1627,383 @@ static void atom_deinit_dev(struct intel_ntb_dev *ndev)
atom_deinit_isr(ndev);
}
+/* Skylake Xeon NTB */
+
+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;
+ resource_size_t bar_size;
+ phys_addr_t bar_addr;
+ int b2b_bar;
+ u8 bar_sz;
+
+ pdev = ndev_pdev(ndev);
+ mmio = ndev->self_mmio;
+
+ if (ndev->b2b_idx == UINT_MAX) {
+ dev_dbg(ndev_dev(ndev), "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(ndev_dev(ndev), "using b2b mw bar %d\n", b2b_bar);
+
+ bar_size = pci_resource_len(ndev->ntb.pdev, b2b_bar);
+
+ dev_dbg(ndev_dev(ndev), "b2b bar size %#llx\n", bar_size);
+
+ if (b2b_mw_share && ((bar_size >> 1) >= XEON_B2B_MIN_SIZE)) {
+ dev_dbg(ndev_dev(ndev),
+ "b2b using first half of bar\n");
+ ndev->b2b_off = bar_size >> 1;
+ } else if (bar_size >= XEON_B2B_MIN_SIZE) {
+ dev_dbg(ndev_dev(ndev),
+ "b2b using whole bar\n");
+ ndev->b2b_off = 0;
+ --ndev->mw_count;
+ } else {
+ dev_dbg(ndev_dev(ndev),
+ "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.
+ */
+ pci_read_config_byte(pdev, SKX_IMBAR1SZ_OFFSET, &bar_sz);
+ dev_dbg(ndev_dev(ndev), "IMBAR1SZ %#x\n", bar_sz);
+ if (b2b_bar == 1) {
+ if (ndev->b2b_off)
+ bar_sz -= 1;
+ else
+ bar_sz = 0;
+ }
+
+ pci_write_config_byte(pdev, SKX_EMBAR1SZ_OFFSET, bar_sz);
+ pci_read_config_byte(pdev, SKX_EMBAR1SZ_OFFSET, &bar_sz);
+ dev_dbg(ndev_dev(ndev), "EMBAR1SZ %#x\n", bar_sz);
+
+ pci_read_config_byte(pdev, SKX_IMBAR2SZ_OFFSET, &bar_sz);
+ dev_dbg(ndev_dev(ndev), "IMBAR2SZ %#x\n", bar_sz);
+ if (b2b_bar == 2) {
+ if (ndev->b2b_off)
+ bar_sz -= 1;
+ else
+ bar_sz = 0;
+ }
+
+ pci_write_config_byte(pdev, SKX_EMBAR2SZ_OFFSET, bar_sz);
+ pci_read_config_byte(pdev, SKX_EMBAR2SZ_OFFSET, &bar_sz);
+ dev_dbg(ndev_dev(ndev), "EMBAR2SZ %#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 == 1)
+ bar_addr = addr->bar2_addr64;
+ else if (b2b_bar == 2)
+ bar_addr = addr->bar4_addr64;
+ else
+ return -EIO;
+
+ /* setup incoming bar limits == base addrs (zero length windows) */
+ bar_addr = addr->bar2_addr64 + (b2b_bar == 1 ? ndev->b2b_off : 0);
+ iowrite64(bar_addr, mmio + SKX_IMBAR1XLMT_OFFSET);
+ bar_addr = ioread64(mmio + SKX_IMBAR1XLMT_OFFSET);
+ dev_dbg(ndev_dev(ndev), "IMBAR1XLMT %#018llx\n", bar_addr);
+
+ bar_addr = addr->bar4_addr64 + (b2b_bar == 2 ? ndev->b2b_off : 0);
+ iowrite64(bar_addr, mmio + SKX_IMBAR2XLMT_OFFSET);
+ bar_addr = ioread64(mmio + SKX_IMBAR2XLMT_OFFSET);
+ dev_dbg(ndev_dev(ndev), "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_pdev(ndev);
+
+ 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(ndev_dev(ndev), "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(ndev_dev(ndev),
+ "Enabling link with max_speed %d max_width %d\n",
+ max_speed, max_width);
+
+ if (max_speed != NTB_SPEED_AUTO)
+ dev_dbg(ndev_dev(ndev), "ignoring max_speed %d\n", max_speed);
+ if (max_width != NTB_WIDTH_AUTO)
+ dev_dbg(ndev_dev(ndev), "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 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 (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(ndev_dev(ndev), "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(ndev_dev(ndev), "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(ndev_dev(ndev), "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)
@@ -2120,6 +2696,24 @@ static int intel_ntb_pci_probe(struct pci_dev *pdev,
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;
@@ -2143,7 +2737,7 @@ err_register:
ndev_deinit_debugfs(ndev);
if (pdev_is_atom(pdev))
atom_deinit_dev(ndev);
- else if (pdev_is_xeon(pdev))
+ else if (pdev_is_xeon(pdev) || pdev_is_skx_xeon(pdev))
xeon_deinit_dev(ndev);
err_init_dev:
intel_ntb_deinit_pci(ndev);
@@ -2161,7 +2755,7 @@ static void intel_ntb_pci_remove(struct pci_dev *pdev)
ndev_deinit_debugfs(ndev);
if (pdev_is_atom(pdev))
atom_deinit_dev(ndev);
- else if (pdev_is_xeon(pdev))
+ else if (pdev_is_xeon(pdev) || pdev_is_skx_xeon(pdev))
xeon_deinit_dev(ndev);
intel_ntb_deinit_pci(ndev);
kfree(ndev);
@@ -2257,6 +2851,36 @@ static struct intel_b2b_addr xeon_b2b_dsd_addr = {
.bar5_addr32 = XEON_B2B_BAR5_ADDR32,
};
+static const struct intel_ntb_reg skx_reg = {
+ .poll_link = xeon_poll_link,
+ .link_is_up = xeon_link_is_up,
+ .db_ioread = skx_db_ioread,
+ .db_iowrite = skx_db_iowrite,
+ .db_size = sizeof(u64),
+ .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,
@@ -2284,6 +2908,31 @@ 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_range = intel_ntb_mw_get_range,
+ .mw_set_trans = intel_ntb3_mw_set_trans,
+ .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,
@@ -2307,6 +2956,7 @@ static const struct pci_device_id intel_ntb_pci_tbl[] = {
{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);
diff --git a/drivers/ntb/hw/intel/ntb_hw_intel.h b/drivers/ntb/hw/intel/ntb_hw_intel.h
index 3ec149cf6562..6e8c1824eb19 100644
--- a/drivers/ntb/hw/intel/ntb_hw_intel.h
+++ b/drivers/ntb/hw/intel/ntb_hw_intel.h
@@ -70,6 +70,7 @@
#define PCI_DEVICE_ID_INTEL_NTB_B2B_BDX 0x6F0D
#define PCI_DEVICE_ID_INTEL_NTB_PS_BDX 0x6F0E
#define PCI_DEVICE_ID_INTEL_NTB_SS_BDX 0x6F0F
+#define PCI_DEVICE_ID_INTEL_NTB_B2B_SKX 0x201C
/* Intel Xeon hardware */
@@ -150,6 +151,51 @@
#define XEON_DB_TOTAL_SHIFT 16
#define XEON_SPAD_COUNT 16
+/* Intel Skylake Xeon hardware */
+#define SKX_IMBAR1SZ_OFFSET 0x00d1
+#define SKX_IMBAR2SZ_OFFSET 0x00d5
+#define SKX_EMBAR1SZ_OFFSET 0x00d3
+#define SKX_EMBAR2SZ_OFFSET 0x00d6
+#define SKX_DEVCTRL_OFFSET 0x0098
+#define SKX_DEVSTS_OFFSET 0x009a
+#define SKX_UNCERRSTS_OFFSET 0x014c
+#define SKX_CORERRSTS_OFFSET 0x0158
+#define SKX_LINK_STATUS_OFFSET 0x01a2
+
+#define SKX_NTBCNTL_OFFSET 0x0000
+#define SKX_IMBAR1XBASE_OFFSET 0x0010 /* SBAR2XLAT */
+#define SKX_IMBAR1XLMT_OFFSET 0x0018 /* SBAR2LMT */
+#define SKX_IMBAR2XBASE_OFFSET 0x0020 /* SBAR4XLAT */
+#define SKX_IMBAR2XLMT_OFFSET 0x0028 /* SBAR4LMT */
+#define SKX_IM_INT_STATUS_OFFSET 0x0040
+#define SKX_IM_INT_DISABLE_OFFSET 0x0048
+#define SKX_IM_SPAD_OFFSET 0x0080 /* SPAD */
+#define SKX_USMEMMISS_OFFSET 0x0070
+#define SKX_INTVEC_OFFSET 0x00d0
+#define SKX_IM_DOORBELL_OFFSET 0x0100 /* SDOORBELL0 */
+#define SKX_B2B_SPAD_OFFSET 0x0180 /* B2B SPAD */
+#define SKX_EMBAR0XBASE_OFFSET 0x4008 /* B2B_XLAT */
+#define SKX_EMBAR1XBASE_OFFSET 0x4010 /* PBAR2XLAT */
+#define SKX_EMBAR1XLMT_OFFSET 0x4018 /* PBAR2LMT */
+#define SKX_EMBAR2XBASE_OFFSET 0x4020 /* PBAR4XLAT */
+#define SKX_EMBAR2XLMT_OFFSET 0x4028 /* PBAR4LMT */
+#define SKX_EM_INT_STATUS_OFFSET 0x4040
+#define SKX_EM_INT_DISABLE_OFFSET 0x4048
+#define SKX_EM_SPAD_OFFSET 0x4080 /* remote SPAD */
+#define SKX_EM_DOORBELL_OFFSET 0x4100 /* PDOORBELL0 */
+#define SKX_SPCICMD_OFFSET 0x4504 /* SPCICMD */
+#define SKX_EMBAR0_OFFSET 0x4510 /* SBAR0BASE */
+#define SKX_EMBAR1_OFFSET 0x4518 /* SBAR23BASE */
+#define SKX_EMBAR2_OFFSET 0x4520 /* SBAR45BASE */
+
+#define SKX_DB_COUNT 32
+#define SKX_DB_LINK 32
+#define SKX_DB_LINK_BIT BIT_ULL(SKX_DB_LINK)
+#define SKX_DB_MSIX_VECTOR_COUNT 33
+#define SKX_DB_MSIX_VECTOR_SHIFT 1
+#define SKX_DB_TOTAL_SHIFT 33
+#define SKX_SPAD_COUNT 16
+
/* Intel Atom hardware */
#define ATOM_SBAR2XLAT_OFFSET 0x0008
@@ -240,6 +286,7 @@
#define NTB_HWERR_SDOORBELL_LOCKUP BIT_ULL(0)
#define NTB_HWERR_SB01BASE_LOCKUP BIT_ULL(1)
#define NTB_HWERR_B2BDOORBELL_BIT14 BIT_ULL(2)
+#define NTB_HWERR_MSIX_VECTOR32_BAD BIT_ULL(3)
/* flags to indicate unsafe api */
#define NTB_UNSAFE_DB BIT_ULL(0)
@@ -263,6 +310,7 @@ struct intel_ntb_reg {
struct intel_ntb_alt_reg {
unsigned long db_bell;
unsigned long db_mask;
+ unsigned long db_clear;
unsigned long spad;
};
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-27 18:13:04 +0100