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-rw-r--r--drivers/ntb/hw/amd/ntb_hw_amd.c18
-rw-r--r--drivers/ntb/hw/amd/ntb_hw_amd.h1
-rw-r--r--drivers/ntb/hw/epf/ntb_hw_epf.c118
-rw-r--r--drivers/ntb/ntb_transport.c7
4 files changed, 93 insertions, 51 deletions
diff --git a/drivers/ntb/hw/amd/ntb_hw_amd.c b/drivers/ntb/hw/amd/ntb_hw_amd.c
index 63ceed89b62e..1a163596ddf5 100644
--- a/drivers/ntb/hw/amd/ntb_hw_amd.c
+++ b/drivers/ntb/hw/amd/ntb_hw_amd.c
@@ -197,13 +197,22 @@ static int amd_ntb_mw_set_trans(struct ntb_dev *ntb, int pidx, int idx,
static int amd_ntb_get_link_status(struct amd_ntb_dev *ndev)
{
- struct pci_dev *pdev = NULL;
+ struct pci_dev *pdev = ndev->ntb.pdev;
struct pci_dev *pci_swds = NULL;
struct pci_dev *pci_swus = NULL;
u32 stat;
int rc;
if (ndev->ntb.topo == NTB_TOPO_SEC) {
+ if (ndev->dev_data->is_endpoint) {
+ rc = pcie_capability_read_dword(pdev, PCI_EXP_LNKCTL, &stat);
+ if (rc)
+ return rc;
+
+ ndev->lnk_sta = stat;
+ return 0;
+ }
+
/* Locate the pointer to Downstream Switch for this device */
pci_swds = pci_upstream_bridge(ndev->ntb.pdev);
if (pci_swds) {
@@ -1311,6 +1320,11 @@ static const struct ntb_dev_data dev_data[] = {
.mw_count = 2,
.mw_idx = 2,
},
+ { /* for device 0x17d7 */
+ .mw_count = 2,
+ .mw_idx = 2,
+ .is_endpoint = true,
+ },
};
static const struct pci_device_id amd_ntb_pci_tbl[] = {
@@ -1319,6 +1333,8 @@ static const struct pci_device_id amd_ntb_pci_tbl[] = {
{ PCI_VDEVICE(AMD, 0x14c0), (kernel_ulong_t)&dev_data[1] },
{ PCI_VDEVICE(AMD, 0x14c3), (kernel_ulong_t)&dev_data[1] },
{ PCI_VDEVICE(AMD, 0x155a), (kernel_ulong_t)&dev_data[1] },
+ { PCI_VDEVICE(AMD, 0x17d4), (kernel_ulong_t)&dev_data[1] },
+ { PCI_VDEVICE(AMD, 0x17d7), (kernel_ulong_t)&dev_data[2] },
{ PCI_VDEVICE(HYGON, 0x145b), (kernel_ulong_t)&dev_data[0] },
{ 0, }
};
diff --git a/drivers/ntb/hw/amd/ntb_hw_amd.h b/drivers/ntb/hw/amd/ntb_hw_amd.h
index 5f337b1572a0..e8c3165fa38b 100644
--- a/drivers/ntb/hw/amd/ntb_hw_amd.h
+++ b/drivers/ntb/hw/amd/ntb_hw_amd.h
@@ -168,6 +168,7 @@ enum {
struct ntb_dev_data {
const unsigned char mw_count;
const unsigned int mw_idx;
+ const bool is_endpoint;
};
struct amd_ntb_dev;
diff --git a/drivers/ntb/hw/epf/ntb_hw_epf.c b/drivers/ntb/hw/epf/ntb_hw_epf.c
index 00f0e78f685b..d3ecf25a5162 100644
--- a/drivers/ntb/hw/epf/ntb_hw_epf.c
+++ b/drivers/ntb/hw/epf/ntb_hw_epf.c
@@ -49,6 +49,7 @@
#define NTB_EPF_COMMAND_TIMEOUT 1000 /* 1 Sec */
enum pci_barno {
+ NO_BAR = -1,
BAR_0,
BAR_1,
BAR_2,
@@ -57,16 +58,26 @@ enum pci_barno {
BAR_5,
};
+enum epf_ntb_bar {
+ BAR_CONFIG,
+ BAR_PEER_SPAD,
+ BAR_DB,
+ BAR_MW1,
+ BAR_MW2,
+ BAR_MW3,
+ BAR_MW4,
+ NTB_BAR_NUM,
+};
+
+#define NTB_EPF_MAX_MW_COUNT (NTB_BAR_NUM - BAR_MW1)
+
struct ntb_epf_dev {
struct ntb_dev ntb;
struct device *dev;
/* Mutex to protect providing commands to NTB EPF */
struct mutex cmd_lock;
- enum pci_barno ctrl_reg_bar;
- enum pci_barno peer_spad_reg_bar;
- enum pci_barno db_reg_bar;
- enum pci_barno mw_bar;
+ const enum pci_barno *barno_map;
unsigned int mw_count;
unsigned int spad_count;
@@ -85,17 +96,6 @@ struct ntb_epf_dev {
#define ntb_ndev(__ntb) container_of(__ntb, struct ntb_epf_dev, ntb)
-struct ntb_epf_data {
- /* BAR that contains both control region and self spad region */
- enum pci_barno ctrl_reg_bar;
- /* BAR that contains peer spad region */
- enum pci_barno peer_spad_reg_bar;
- /* BAR that contains Doorbell region and Memory window '1' */
- enum pci_barno db_reg_bar;
- /* BAR that contains memory windows*/
- enum pci_barno mw_bar;
-};
-
static int ntb_epf_send_command(struct ntb_epf_dev *ndev, u32 command,
u32 argument)
{
@@ -144,7 +144,7 @@ static int ntb_epf_mw_to_bar(struct ntb_epf_dev *ndev, int idx)
return -EINVAL;
}
- return idx + 2;
+ return ndev->barno_map[BAR_MW1 + idx];
}
static int ntb_epf_mw_count(struct ntb_dev *ntb, int pidx)
@@ -413,7 +413,9 @@ static int ntb_epf_mw_set_trans(struct ntb_dev *ntb, int pidx, int idx,
return -EINVAL;
}
- bar = idx + ndev->mw_bar;
+ bar = ntb_epf_mw_to_bar(ndev, idx);
+ if (bar < 0)
+ return bar;
mw_size = pci_resource_len(ntb->pdev, bar);
@@ -455,7 +457,9 @@ static int ntb_epf_peer_mw_get_addr(struct ntb_dev *ntb, int idx,
if (idx == 0)
offset = readl(ndev->ctrl_reg + NTB_EPF_MW1_OFFSET);
- bar = idx + ndev->mw_bar;
+ bar = ntb_epf_mw_to_bar(ndev, idx);
+ if (bar < 0)
+ return bar;
if (base)
*base = pci_resource_start(ndev->ntb.pdev, bar) + offset;
@@ -560,6 +564,11 @@ static int ntb_epf_init_dev(struct ntb_epf_dev *ndev)
ndev->mw_count = readl(ndev->ctrl_reg + NTB_EPF_MW_COUNT);
ndev->spad_count = readl(ndev->ctrl_reg + NTB_EPF_SPAD_COUNT);
+ if (ndev->mw_count > NTB_EPF_MAX_MW_COUNT) {
+ dev_err(dev, "Unsupported MW count: %u\n", ndev->mw_count);
+ return -EINVAL;
+ }
+
return 0;
}
@@ -596,14 +605,15 @@ static int ntb_epf_init_pci(struct ntb_epf_dev *ndev,
dev_warn(&pdev->dev, "Cannot DMA highmem\n");
}
- ndev->ctrl_reg = pci_iomap(pdev, ndev->ctrl_reg_bar, 0);
+ ndev->ctrl_reg = pci_iomap(pdev, ndev->barno_map[BAR_CONFIG], 0);
if (!ndev->ctrl_reg) {
ret = -EIO;
goto err_pci_regions;
}
- if (ndev->peer_spad_reg_bar) {
- ndev->peer_spad_reg = pci_iomap(pdev, ndev->peer_spad_reg_bar, 0);
+ if (ndev->barno_map[BAR_PEER_SPAD] != ndev->barno_map[BAR_CONFIG]) {
+ ndev->peer_spad_reg = pci_iomap(pdev,
+ ndev->barno_map[BAR_PEER_SPAD], 0);
if (!ndev->peer_spad_reg) {
ret = -EIO;
goto err_pci_regions;
@@ -614,7 +624,7 @@ static int ntb_epf_init_pci(struct ntb_epf_dev *ndev,
ndev->peer_spad_reg = ndev->ctrl_reg + spad_off + spad_sz;
}
- ndev->db_reg = pci_iomap(pdev, ndev->db_reg_bar, 0);
+ ndev->db_reg = pci_iomap(pdev, ndev->barno_map[BAR_DB], 0);
if (!ndev->db_reg) {
ret = -EIO;
goto err_pci_regions;
@@ -659,12 +669,7 @@ static void ntb_epf_cleanup_isr(struct ntb_epf_dev *ndev)
static int ntb_epf_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
- enum pci_barno peer_spad_reg_bar = BAR_1;
- enum pci_barno ctrl_reg_bar = BAR_0;
- enum pci_barno db_reg_bar = BAR_2;
- enum pci_barno mw_bar = BAR_2;
struct device *dev = &pdev->dev;
- struct ntb_epf_data *data;
struct ntb_epf_dev *ndev;
int ret;
@@ -675,18 +680,10 @@ static int ntb_epf_pci_probe(struct pci_dev *pdev,
if (!ndev)
return -ENOMEM;
- data = (struct ntb_epf_data *)id->driver_data;
- if (data) {
- peer_spad_reg_bar = data->peer_spad_reg_bar;
- ctrl_reg_bar = data->ctrl_reg_bar;
- db_reg_bar = data->db_reg_bar;
- mw_bar = data->mw_bar;
- }
+ ndev->barno_map = (const enum pci_barno *)id->driver_data;
+ if (!ndev->barno_map)
+ return -EINVAL;
- ndev->peer_spad_reg_bar = peer_spad_reg_bar;
- ndev->ctrl_reg_bar = ctrl_reg_bar;
- ndev->db_reg_bar = db_reg_bar;
- ndev->mw_bar = mw_bar;
ndev->dev = dev;
ntb_epf_init_struct(ndev, pdev);
@@ -730,30 +727,51 @@ static void ntb_epf_pci_remove(struct pci_dev *pdev)
ntb_epf_deinit_pci(ndev);
}
-static const struct ntb_epf_data j721e_data = {
- .ctrl_reg_bar = BAR_0,
- .peer_spad_reg_bar = BAR_1,
- .db_reg_bar = BAR_2,
- .mw_bar = BAR_2,
+static const enum pci_barno j721e_map[NTB_BAR_NUM] = {
+ [BAR_CONFIG] = BAR_0,
+ [BAR_PEER_SPAD] = BAR_1,
+ [BAR_DB] = BAR_2,
+ [BAR_MW1] = BAR_2,
+ [BAR_MW2] = BAR_3,
+ [BAR_MW3] = BAR_4,
+ [BAR_MW4] = BAR_5
};
-static const struct ntb_epf_data mx8_data = {
- .ctrl_reg_bar = BAR_0,
- .peer_spad_reg_bar = BAR_0,
- .db_reg_bar = BAR_2,
- .mw_bar = BAR_4,
+static const enum pci_barno mx8_map[NTB_BAR_NUM] = {
+ [BAR_CONFIG] = BAR_0,
+ [BAR_PEER_SPAD] = BAR_0,
+ [BAR_DB] = BAR_2,
+ [BAR_MW1] = BAR_4,
+ [BAR_MW2] = BAR_5,
+ [BAR_MW3] = NO_BAR,
+ [BAR_MW4] = NO_BAR
+};
+
+static const enum pci_barno rcar_barno[NTB_BAR_NUM] = {
+ [BAR_CONFIG] = BAR_0,
+ [BAR_PEER_SPAD] = BAR_0,
+ [BAR_DB] = BAR_4,
+ [BAR_MW1] = BAR_2,
+ [BAR_MW2] = NO_BAR,
+ [BAR_MW3] = NO_BAR,
+ [BAR_MW4] = NO_BAR,
};
static const struct pci_device_id ntb_epf_pci_tbl[] = {
{
PCI_DEVICE(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_J721E),
.class = PCI_CLASS_MEMORY_RAM << 8, .class_mask = 0xffff00,
- .driver_data = (kernel_ulong_t)&j721e_data,
+ .driver_data = (kernel_ulong_t)j721e_map,
},
{
PCI_DEVICE(PCI_VENDOR_ID_FREESCALE, 0x0809),
.class = PCI_CLASS_MEMORY_RAM << 8, .class_mask = 0xffff00,
- .driver_data = (kernel_ulong_t)&mx8_data,
+ .driver_data = (kernel_ulong_t)mx8_map,
+ },
+ {
+ PCI_DEVICE(PCI_VENDOR_ID_RENESAS, 0x0030),
+ .class = PCI_CLASS_MEMORY_RAM << 8, .class_mask = 0xffff00,
+ .driver_data = (kernel_ulong_t)rcar_barno,
},
{ },
};
diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c
index 4f775c3e218f..eb875e3db2e3 100644
--- a/drivers/ntb/ntb_transport.c
+++ b/drivers/ntb/ntb_transport.c
@@ -59,6 +59,7 @@
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/uaccess.h>
+#include <linux/mutex.h>
#include "linux/ntb.h"
#include "linux/ntb_transport.h"
@@ -241,6 +242,9 @@ struct ntb_transport_ctx {
struct work_struct link_cleanup;
struct dentry *debugfs_node_dir;
+
+ /* Make sure workq of link event be executed serially */
+ struct mutex link_event_lock;
};
enum {
@@ -1024,6 +1028,7 @@ static void ntb_transport_link_cleanup_work(struct work_struct *work)
struct ntb_transport_ctx *nt =
container_of(work, struct ntb_transport_ctx, link_cleanup);
+ guard(mutex)(&nt->link_event_lock);
ntb_transport_link_cleanup(nt);
}
@@ -1047,6 +1052,8 @@ static void ntb_transport_link_work(struct work_struct *work)
u32 val;
int rc = 0, i, spad;
+ guard(mutex)(&nt->link_event_lock);
+
/* send the local info, in the opposite order of the way we read it */
if (nt->use_msi) {
generated by cgit (git 2.34.1) at 2025-10-11 22:16:03 +0000