Commit 01e0d603 authored by Linus Torvalds's avatar Linus Torvalds

Merge tag 'ntb-4.10' of git://github.com/jonmason/ntb

Pull NTB update from Jon Mason:

 - NTB bug fixes for removing an unnecessary call to ntb_peer_spad_read,
   and correcting a free_irq inconsistency

 - add Intel SKX support

 - change the AMD NTB maintainer, and fix some bugs present there

* tag 'ntb-4.10' of git://github.com/jonmason/ntb:
  ntb_transport: Remove unnecessary call to ntb_peer_spad_read
  NTB: Fix 'request_irq()' and 'free_irq()' inconsistancy
  ntb: fix SKX NTB config space size register offsets
  NTB: correct ntb_peer_spad_read for case when callback is not supplied.
  MAINTAINERS: Change in maintainer for AMD NTB
  ntb_transport: Limit memory windows based on available, scratchpads
  NTB: Register and offset values fix for memory window
  NTB: add support for hotplug feature
  ntb: Adding Skylake Xeon NTB support
parents 6ac3bb16 dfb7d24c
...@@ -8828,7 +8828,7 @@ T: git git://github.com/jonmason/ntb.git ...@@ -8828,7 +8828,7 @@ T: git git://github.com/jonmason/ntb.git
F: drivers/ntb/hw/intel/ F: drivers/ntb/hw/intel/
NTB AMD DRIVER NTB AMD DRIVER
M: Xiangliang Yu <Xiangliang.Yu@amd.com> M: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
L: linux-ntb@googlegroups.com L: linux-ntb@googlegroups.com
S: Supported S: Supported
F: drivers/ntb/hw/amd/ F: drivers/ntb/hw/amd/
......
...@@ -138,11 +138,11 @@ static int amd_ntb_mw_set_trans(struct ntb_dev *ntb, int idx, ...@@ -138,11 +138,11 @@ static int amd_ntb_mw_set_trans(struct ntb_dev *ntb, int idx,
base_addr = pci_resource_start(ndev->ntb.pdev, bar); base_addr = pci_resource_start(ndev->ntb.pdev, bar);
if (bar != 1) { if (bar != 1) {
xlat_reg = AMD_BAR23XLAT_OFFSET + ((bar - 2) << 3); xlat_reg = AMD_BAR23XLAT_OFFSET + ((bar - 2) << 2);
limit_reg = AMD_BAR23LMT_OFFSET + ((bar - 2) << 3); limit_reg = AMD_BAR23LMT_OFFSET + ((bar - 2) << 2);
/* Set the limit if supported */ /* Set the limit if supported */
limit = base_addr + size; limit = size;
/* set and verify setting the translation address */ /* set and verify setting the translation address */
write64(addr, peer_mmio + xlat_reg); write64(addr, peer_mmio + xlat_reg);
...@@ -164,14 +164,8 @@ static int amd_ntb_mw_set_trans(struct ntb_dev *ntb, int idx, ...@@ -164,14 +164,8 @@ static int amd_ntb_mw_set_trans(struct ntb_dev *ntb, int idx,
xlat_reg = AMD_BAR1XLAT_OFFSET; xlat_reg = AMD_BAR1XLAT_OFFSET;
limit_reg = AMD_BAR1LMT_OFFSET; limit_reg = AMD_BAR1LMT_OFFSET;
/* split bar addr range must all be 32 bit */
if (addr & (~0ull << 32))
return -EINVAL;
if ((addr + size) & (~0ull << 32))
return -EINVAL;
/* Set the limit if supported */ /* Set the limit if supported */
limit = base_addr + size; limit = size;
/* set and verify setting the translation address */ /* set and verify setting the translation address */
write64(addr, peer_mmio + xlat_reg); write64(addr, peer_mmio + xlat_reg);
...@@ -199,6 +193,11 @@ static int amd_link_is_up(struct amd_ntb_dev *ndev) ...@@ -199,6 +193,11 @@ static int amd_link_is_up(struct amd_ntb_dev *ndev)
if (!ndev->peer_sta) if (!ndev->peer_sta)
return NTB_LNK_STA_ACTIVE(ndev->cntl_sta); return NTB_LNK_STA_ACTIVE(ndev->cntl_sta);
if (ndev->peer_sta & AMD_LINK_UP_EVENT) {
ndev->peer_sta = 0;
return 1;
}
/* If peer_sta is reset or D0 event, the ISR has /* If peer_sta is reset or D0 event, the ISR has
* started a timer to check link status of hardware. * started a timer to check link status of hardware.
* So here just clear status bit. And if peer_sta is * So here just clear status bit. And if peer_sta is
...@@ -207,7 +206,7 @@ static int amd_link_is_up(struct amd_ntb_dev *ndev) ...@@ -207,7 +206,7 @@ static int amd_link_is_up(struct amd_ntb_dev *ndev)
*/ */
if (ndev->peer_sta & AMD_PEER_RESET_EVENT) if (ndev->peer_sta & AMD_PEER_RESET_EVENT)
ndev->peer_sta &= ~AMD_PEER_RESET_EVENT; ndev->peer_sta &= ~AMD_PEER_RESET_EVENT;
else if (ndev->peer_sta & AMD_PEER_D0_EVENT) else if (ndev->peer_sta & (AMD_PEER_D0_EVENT | AMD_LINK_DOWN_EVENT))
ndev->peer_sta = 0; ndev->peer_sta = 0;
return 0; return 0;
...@@ -491,6 +490,8 @@ static void amd_handle_event(struct amd_ntb_dev *ndev, int vec) ...@@ -491,6 +490,8 @@ static void amd_handle_event(struct amd_ntb_dev *ndev, int vec)
break; break;
case AMD_PEER_D3_EVENT: case AMD_PEER_D3_EVENT:
case AMD_PEER_PMETO_EVENT: case AMD_PEER_PMETO_EVENT:
case AMD_LINK_UP_EVENT:
case AMD_LINK_DOWN_EVENT:
amd_ack_smu(ndev, status); amd_ack_smu(ndev, status);
/* link down */ /* link down */
...@@ -598,7 +599,7 @@ static int ndev_init_isr(struct amd_ntb_dev *ndev, ...@@ -598,7 +599,7 @@ static int ndev_init_isr(struct amd_ntb_dev *ndev,
err_msix_request: err_msix_request:
while (i-- > 0) while (i-- > 0)
free_irq(ndev->msix[i].vector, ndev); free_irq(ndev->msix[i].vector, &ndev->vec[i]);
pci_disable_msix(pdev); pci_disable_msix(pdev);
err_msix_enable: err_msix_enable:
kfree(ndev->msix); kfree(ndev->msix);
......
...@@ -148,9 +148,12 @@ enum { ...@@ -148,9 +148,12 @@ enum {
AMD_PEER_D3_EVENT = BIT(2), AMD_PEER_D3_EVENT = BIT(2),
AMD_PEER_PMETO_EVENT = BIT(3), AMD_PEER_PMETO_EVENT = BIT(3),
AMD_PEER_D0_EVENT = BIT(4), AMD_PEER_D0_EVENT = BIT(4),
AMD_LINK_UP_EVENT = BIT(5),
AMD_LINK_DOWN_EVENT = BIT(6),
AMD_EVENT_INTMASK = (AMD_PEER_FLUSH_EVENT | AMD_EVENT_INTMASK = (AMD_PEER_FLUSH_EVENT |
AMD_PEER_RESET_EVENT | AMD_PEER_D3_EVENT | AMD_PEER_RESET_EVENT | AMD_PEER_D3_EVENT |
AMD_PEER_PMETO_EVENT | AMD_PEER_D0_EVENT), AMD_PEER_PMETO_EVENT | AMD_PEER_D0_EVENT |
AMD_LINK_UP_EVENT | AMD_LINK_DOWN_EVENT),
AMD_PMESTAT_OFFSET = 0x480, AMD_PMESTAT_OFFSET = 0x480,
AMD_PMSGTRIG_OFFSET = 0x490, AMD_PMSGTRIG_OFFSET = 0x490,
......
...@@ -86,7 +86,12 @@ static const struct intel_ntb_xlat_reg xeon_pri_xlat; ...@@ -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 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_usd_addr;
static struct intel_b2b_addr xeon_b2b_dsd_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_ntb_ops;
static const struct ntb_dev_ops intel_ntb3_ops;
static const struct file_operations intel_ntb_debugfs_info; static const struct file_operations intel_ntb_debugfs_info;
static struct dentry *debugfs_dir; static struct dentry *debugfs_dir;
...@@ -145,6 +150,9 @@ module_param_named(xeon_b2b_dsd_bar5_addr32, ...@@ -145,6 +150,9 @@ module_param_named(xeon_b2b_dsd_bar5_addr32,
MODULE_PARM_DESC(xeon_b2b_dsd_bar5_addr32, MODULE_PARM_DESC(xeon_b2b_dsd_bar5_addr32,
"XEON B2B DSD split-BAR 5 32-bit address"); "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 #ifndef ioread64
#ifdef readq #ifdef readq
#define ioread64 readq #define ioread64 readq
...@@ -206,6 +214,14 @@ static inline int pdev_is_xeon(struct pci_dev *pdev) ...@@ -206,6 +214,14 @@ static inline int pdev_is_xeon(struct pci_dev *pdev)
return 0; 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) static inline void ndev_reset_unsafe_flags(struct intel_ntb_dev *ndev)
{ {
ndev->unsafe_flags = 0; ndev->unsafe_flags = 0;
...@@ -390,6 +406,9 @@ static irqreturn_t ndev_interrupt(struct intel_ntb_dev *ndev, int vec) ...@@ -390,6 +406,9 @@ static irqreturn_t ndev_interrupt(struct intel_ntb_dev *ndev, int vec)
vec_mask = ndev_vec_mask(ndev, 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); dev_dbg(ndev_dev(ndev), "vec %d vec_mask %llx\n", vec, vec_mask);
ndev->last_ts = jiffies; ndev->last_ts = jiffies;
...@@ -409,6 +428,9 @@ static irqreturn_t ndev_vec_isr(int irq, void *dev) ...@@ -409,6 +428,9 @@ static irqreturn_t ndev_vec_isr(int irq, void *dev)
{ {
struct intel_ntb_vec *nvec = 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); return ndev_interrupt(nvec->ndev, nvec->num);
} }
...@@ -465,14 +487,14 @@ static int ndev_init_isr(struct intel_ntb_dev *ndev, ...@@ -465,14 +487,14 @@ static int ndev_init_isr(struct intel_ntb_dev *ndev,
goto err_msix_request; 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_count = msix_count;
ndev->db_vec_shift = msix_shift; ndev->db_vec_shift = msix_shift;
return 0; return 0;
err_msix_request: err_msix_request:
while (i-- > 0) while (i-- > 0)
free_irq(ndev->msix[i].vector, ndev); free_irq(ndev->msix[i].vector, &ndev->vec[i]);
pci_disable_msix(pdev); pci_disable_msix(pdev);
err_msix_enable: err_msix_enable:
kfree(ndev->msix); kfree(ndev->msix);
...@@ -547,8 +569,171 @@ static void ndev_deinit_isr(struct intel_ntb_dev *ndev) ...@@ -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, static ssize_t ndev_ntb3_debugfs_read(struct file *filp, char __user *ubuf,
size_t count, loff_t *offp) 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 intel_ntb_dev *ndev;
struct pci_dev *pdev; struct pci_dev *pdev;
...@@ -813,6 +998,20 @@ static ssize_t ndev_debugfs_read(struct file *filp, char __user *ubuf, ...@@ -813,6 +998,20 @@ static ssize_t ndev_debugfs_read(struct file *filp, char __user *ubuf,
return ret; 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) static void ndev_init_debugfs(struct intel_ntb_dev *ndev)
{ {
if (!debugfs_dir) { if (!debugfs_dir) {
...@@ -1428,6 +1627,383 @@ static void atom_deinit_dev(struct intel_ntb_dev *ndev) ...@@ -1428,6 +1627,383 @@ static void atom_deinit_dev(struct intel_ntb_dev *ndev)
atom_deinit_isr(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 */ /* XEON */
static u64 xeon_db_ioread(void __iomem *mmio) static u64 xeon_db_ioread(void __iomem *mmio)
...@@ -2120,6 +2696,24 @@ static int intel_ntb_pci_probe(struct pci_dev *pdev, ...@@ -2120,6 +2696,24 @@ static int intel_ntb_pci_probe(struct pci_dev *pdev,
if (rc) if (rc)
goto err_init_dev; 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 { } else {
rc = -EINVAL; rc = -EINVAL;
goto err_ndev; goto err_ndev;
...@@ -2143,7 +2737,7 @@ static int intel_ntb_pci_probe(struct pci_dev *pdev, ...@@ -2143,7 +2737,7 @@ static int intel_ntb_pci_probe(struct pci_dev *pdev,
ndev_deinit_debugfs(ndev); ndev_deinit_debugfs(ndev);
if (pdev_is_atom(pdev)) if (pdev_is_atom(pdev))
atom_deinit_dev(ndev); 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); xeon_deinit_dev(ndev);
err_init_dev: err_init_dev:
intel_ntb_deinit_pci(ndev); intel_ntb_deinit_pci(ndev);
...@@ -2161,7 +2755,7 @@ static void intel_ntb_pci_remove(struct pci_dev *pdev) ...@@ -2161,7 +2755,7 @@ static void intel_ntb_pci_remove(struct pci_dev *pdev)
ndev_deinit_debugfs(ndev); ndev_deinit_debugfs(ndev);
if (pdev_is_atom(pdev)) if (pdev_is_atom(pdev))
atom_deinit_dev(ndev); 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); xeon_deinit_dev(ndev);
intel_ntb_deinit_pci(ndev); intel_ntb_deinit_pci(ndev);
kfree(ndev); kfree(ndev);
...@@ -2257,6 +2851,36 @@ static struct intel_b2b_addr xeon_b2b_dsd_addr = { ...@@ -2257,6 +2851,36 @@ static struct intel_b2b_addr xeon_b2b_dsd_addr = {
.bar5_addr32 = XEON_B2B_BAR5_ADDR32, .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 */ /* operations for primary side of local ntb */
static const struct ntb_dev_ops intel_ntb_ops = { static const struct ntb_dev_ops intel_ntb_ops = {
.mw_count = intel_ntb_mw_count, .mw_count = intel_ntb_mw_count,
...@@ -2284,6 +2908,31 @@ static const struct ntb_dev_ops intel_ntb_ops = { ...@@ -2284,6 +2908,31 @@ static const struct ntb_dev_ops intel_ntb_ops = {
.peer_spad_write = intel_ntb_peer_spad_write, .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 = { static const struct file_operations intel_ntb_debugfs_info = {
.owner = THIS_MODULE, .owner = THIS_MODULE,
.open = simple_open, .open = simple_open,
...@@ -2307,6 +2956,7 @@ static const struct pci_device_id intel_ntb_pci_tbl[] = { ...@@ -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_IVT)},
{PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_SS_HSX)}, {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_SS_BDX)},
{PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_B2B_SKX)},
{0} {0}
}; };
MODULE_DEVICE_TABLE(pci, intel_ntb_pci_tbl); MODULE_DEVICE_TABLE(pci, intel_ntb_pci_tbl);
......
...@@ -70,6 +70,7 @@ ...@@ -70,6 +70,7 @@
#define PCI_DEVICE_ID_INTEL_NTB_B2B_BDX 0x6F0D #define PCI_DEVICE_ID_INTEL_NTB_B2B_BDX 0x6F0D
#define PCI_DEVICE_ID_INTEL_NTB_PS_BDX 0x6F0E #define PCI_DEVICE_ID_INTEL_NTB_PS_BDX 0x6F0E
#define PCI_DEVICE_ID_INTEL_NTB_SS_BDX 0x6F0F #define PCI_DEVICE_ID_INTEL_NTB_SS_BDX 0x6F0F
#define PCI_DEVICE_ID_INTEL_NTB_B2B_SKX 0x201C
/* Intel Xeon hardware */ /* Intel Xeon hardware */
...@@ -150,6 +151,51 @@ ...@@ -150,6 +151,51 @@
#define XEON_DB_TOTAL_SHIFT 16 #define XEON_DB_TOTAL_SHIFT 16
#define XEON_SPAD_COUNT 16 #define XEON_SPAD_COUNT 16
/* Intel Skylake Xeon hardware */
#define SKX_IMBAR1SZ_OFFSET 0x00d0
#define SKX_IMBAR2SZ_OFFSET 0x00d1
#define SKX_EMBAR1SZ_OFFSET 0x00d2
#define SKX_EMBAR2SZ_OFFSET 0x00d3
#define SKX_DEVCTRL_OFFSET 0x0098
#define SKX_DEVSTS_OFFSET 0x009a
#define SKX_UNCERRSTS_OFFSET 0x014c
#define SKX_CORERRSTS_OFFSET 0x0158
#define SKX_LINK_STATUS_OFFSET 0x01a2
#define SKX_NTBCNTL_OFFSET 0x0000
#define SKX_IMBAR1XBASE_OFFSET 0x0010 /* SBAR2XLAT */
#define SKX_IMBAR1XLMT_OFFSET 0x0018 /* SBAR2LMT */
#define SKX_IMBAR2XBASE_OFFSET 0x0020 /* SBAR4XLAT */
#define SKX_IMBAR2XLMT_OFFSET 0x0028 /* SBAR4LMT */
#define SKX_IM_INT_STATUS_OFFSET 0x0040
#define SKX_IM_INT_DISABLE_OFFSET 0x0048
#define SKX_IM_SPAD_OFFSET 0x0080 /* SPAD */
#define SKX_USMEMMISS_OFFSET 0x0070
#define SKX_INTVEC_OFFSET 0x00d0
#define SKX_IM_DOORBELL_OFFSET 0x0100 /* SDOORBELL0 */
#define SKX_B2B_SPAD_OFFSET 0x0180 /* B2B SPAD */
#define SKX_EMBAR0XBASE_OFFSET 0x4008 /* B2B_XLAT */
#define SKX_EMBAR1XBASE_OFFSET 0x4010 /* PBAR2XLAT */
#define SKX_EMBAR1XLMT_OFFSET 0x4018 /* PBAR2LMT */
#define SKX_EMBAR2XBASE_OFFSET 0x4020 /* PBAR4XLAT */
#define SKX_EMBAR2XLMT_OFFSET 0x4028 /* PBAR4LMT */
#define SKX_EM_INT_STATUS_OFFSET 0x4040
#define SKX_EM_INT_DISABLE_OFFSET 0x4048
#define SKX_EM_SPAD_OFFSET 0x4080 /* remote SPAD */
#define SKX_EM_DOORBELL_OFFSET 0x4100 /* PDOORBELL0 */
#define SKX_SPCICMD_OFFSET 0x4504 /* SPCICMD */
#define SKX_EMBAR0_OFFSET 0x4510 /* SBAR0BASE */
#define SKX_EMBAR1_OFFSET 0x4518 /* SBAR23BASE */
#define SKX_EMBAR2_OFFSET 0x4520 /* SBAR45BASE */
#define SKX_DB_COUNT 32
#define SKX_DB_LINK 32
#define SKX_DB_LINK_BIT BIT_ULL(SKX_DB_LINK)
#define SKX_DB_MSIX_VECTOR_COUNT 33
#define SKX_DB_MSIX_VECTOR_SHIFT 1
#define SKX_DB_TOTAL_SHIFT 33
#define SKX_SPAD_COUNT 16
/* Intel Atom hardware */ /* Intel Atom hardware */
#define ATOM_SBAR2XLAT_OFFSET 0x0008 #define ATOM_SBAR2XLAT_OFFSET 0x0008
...@@ -240,6 +286,7 @@ ...@@ -240,6 +286,7 @@
#define NTB_HWERR_SDOORBELL_LOCKUP BIT_ULL(0) #define NTB_HWERR_SDOORBELL_LOCKUP BIT_ULL(0)
#define NTB_HWERR_SB01BASE_LOCKUP BIT_ULL(1) #define NTB_HWERR_SB01BASE_LOCKUP BIT_ULL(1)
#define NTB_HWERR_B2BDOORBELL_BIT14 BIT_ULL(2) #define NTB_HWERR_B2BDOORBELL_BIT14 BIT_ULL(2)
#define NTB_HWERR_MSIX_VECTOR32_BAD BIT_ULL(3)
/* flags to indicate unsafe api */ /* flags to indicate unsafe api */
#define NTB_UNSAFE_DB BIT_ULL(0) #define NTB_UNSAFE_DB BIT_ULL(0)
...@@ -263,6 +310,7 @@ struct intel_ntb_reg { ...@@ -263,6 +310,7 @@ struct intel_ntb_reg {
struct intel_ntb_alt_reg { struct intel_ntb_alt_reg {
unsigned long db_bell; unsigned long db_bell;
unsigned long db_mask; unsigned long db_mask;
unsigned long db_clear;
unsigned long spad; unsigned long spad;
}; };
......
...@@ -66,6 +66,7 @@ ...@@ -66,6 +66,7 @@
#define NTB_TRANSPORT_VER "4" #define NTB_TRANSPORT_VER "4"
#define NTB_TRANSPORT_NAME "ntb_transport" #define NTB_TRANSPORT_NAME "ntb_transport"
#define NTB_TRANSPORT_DESC "Software Queue-Pair Transport over NTB" #define NTB_TRANSPORT_DESC "Software Queue-Pair Transport over NTB"
#define NTB_TRANSPORT_MIN_SPADS (MW0_SZ_HIGH + 2)
MODULE_DESCRIPTION(NTB_TRANSPORT_DESC); MODULE_DESCRIPTION(NTB_TRANSPORT_DESC);
MODULE_VERSION(NTB_TRANSPORT_VER); MODULE_VERSION(NTB_TRANSPORT_VER);
...@@ -242,9 +243,6 @@ enum { ...@@ -242,9 +243,6 @@ enum {
NUM_MWS, NUM_MWS,
MW0_SZ_HIGH, MW0_SZ_HIGH,
MW0_SZ_LOW, MW0_SZ_LOW,
MW1_SZ_HIGH,
MW1_SZ_LOW,
MAX_SPAD,
}; };
#define dev_client_dev(__dev) \ #define dev_client_dev(__dev) \
...@@ -811,7 +809,7 @@ static void ntb_transport_link_cleanup(struct ntb_transport_ctx *nt) ...@@ -811,7 +809,7 @@ static void ntb_transport_link_cleanup(struct ntb_transport_ctx *nt)
{ {
struct ntb_transport_qp *qp; struct ntb_transport_qp *qp;
u64 qp_bitmap_alloc; u64 qp_bitmap_alloc;
int i; unsigned int i, count;
qp_bitmap_alloc = nt->qp_bitmap & ~nt->qp_bitmap_free; qp_bitmap_alloc = nt->qp_bitmap & ~nt->qp_bitmap_free;
...@@ -831,7 +829,8 @@ static void ntb_transport_link_cleanup(struct ntb_transport_ctx *nt) ...@@ -831,7 +829,8 @@ static void ntb_transport_link_cleanup(struct ntb_transport_ctx *nt)
* goes down, blast them now to give them a sane value the next * goes down, blast them now to give them a sane value the next
* time they are accessed * time they are accessed
*/ */
for (i = 0; i < MAX_SPAD; i++) count = ntb_spad_count(nt->ndev);
for (i = 0; i < count; i++)
ntb_spad_write(nt->ndev, i, 0); ntb_spad_write(nt->ndev, i, 0);
} }
...@@ -960,7 +959,6 @@ static void ntb_qp_link_work(struct work_struct *work) ...@@ -960,7 +959,6 @@ static void ntb_qp_link_work(struct work_struct *work)
ntb_peer_spad_write(nt->ndev, QP_LINKS, val | BIT(qp->qp_num)); ntb_peer_spad_write(nt->ndev, QP_LINKS, val | BIT(qp->qp_num));
/* query remote spad for qp ready bits */ /* query remote spad for qp ready bits */
ntb_peer_spad_read(nt->ndev, QP_LINKS);
dev_dbg_ratelimited(&pdev->dev, "Remote QP link status = %x\n", val); dev_dbg_ratelimited(&pdev->dev, "Remote QP link status = %x\n", val);
/* See if the remote side is up */ /* See if the remote side is up */
...@@ -1064,17 +1062,12 @@ static int ntb_transport_probe(struct ntb_client *self, struct ntb_dev *ndev) ...@@ -1064,17 +1062,12 @@ static int ntb_transport_probe(struct ntb_client *self, struct ntb_dev *ndev)
{ {
struct ntb_transport_ctx *nt; struct ntb_transport_ctx *nt;
struct ntb_transport_mw *mw; struct ntb_transport_mw *mw;
unsigned int mw_count, qp_count; unsigned int mw_count, qp_count, spad_count, max_mw_count_for_spads;
u64 qp_bitmap; u64 qp_bitmap;
int node; int node;
int rc, i; int rc, i;
mw_count = ntb_mw_count(ndev); mw_count = ntb_mw_count(ndev);
if (ntb_spad_count(ndev) < (NUM_MWS + 1 + mw_count * 2)) {
dev_err(&ndev->dev, "Not enough scratch pad registers for %s",
NTB_TRANSPORT_NAME);
return -EIO;
}
if (ntb_db_is_unsafe(ndev)) if (ntb_db_is_unsafe(ndev))
dev_dbg(&ndev->dev, dev_dbg(&ndev->dev,
...@@ -1090,8 +1083,18 @@ static int ntb_transport_probe(struct ntb_client *self, struct ntb_dev *ndev) ...@@ -1090,8 +1083,18 @@ static int ntb_transport_probe(struct ntb_client *self, struct ntb_dev *ndev)
return -ENOMEM; return -ENOMEM;
nt->ndev = ndev; nt->ndev = ndev;
spad_count = ntb_spad_count(ndev);
/* Limit the MW's based on the availability of scratchpads */
if (spad_count < NTB_TRANSPORT_MIN_SPADS) {
nt->mw_count = 0;
rc = -EINVAL;
goto err;
}
nt->mw_count = mw_count; max_mw_count_for_spads = (spad_count - MW0_SZ_HIGH) / 2;
nt->mw_count = min(mw_count, max_mw_count_for_spads);
nt->mw_vec = kzalloc_node(mw_count * sizeof(*nt->mw_vec), nt->mw_vec = kzalloc_node(mw_count * sizeof(*nt->mw_vec),
GFP_KERNEL, node); GFP_KERNEL, node);
......
...@@ -968,6 +968,9 @@ static inline int ntb_peer_spad_addr(struct ntb_dev *ntb, int idx, ...@@ -968,6 +968,9 @@ static inline int ntb_peer_spad_addr(struct ntb_dev *ntb, int idx,
*/ */
static inline u32 ntb_peer_spad_read(struct ntb_dev *ntb, int idx) static inline u32 ntb_peer_spad_read(struct ntb_dev *ntb, int idx)
{ {
if (!ntb->ops->peer_spad_read)
return 0;
return ntb->ops->peer_spad_read(ntb, idx); return ntb->ops->peer_spad_read(ntb, idx);
} }
......
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