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authorSanjay R Mehta <sanju.mehta@amd.com>2019-09-15 20:08:35 +0300
committerJon Mason <jdmason@kudzu.us>2019-09-24 00:20:40 +0300
commita1472e73e3d791eb5eddeceb99f7dc5c17ca98ce (patch)
tree1b6f267d37d1d97ccbee5ca6e96fe9d304db9eb6
parent5f59f6b182f75e5247104c8e0150c3d41f0a4c18 (diff)
downloadlinux-a1472e73e3d791eb5eddeceb99f7dc5c17ca98ce.tar.xz
ntb_hw_amd: Add memory window support for new AMD hardware
The AMD new hardware uses BAR23 and BAR45 as memory windows as compared to previos where BAR1, BAR23 and BAR45 is used for memory windows. This patch add support for both AMD hardwares. Signed-off-by: Sanjay R Mehta <sanju.mehta@amd.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
-rw-r--r--drivers/ntb/hw/amd/ntb_hw_amd.c23
-rw-r--r--drivers/ntb/hw/amd/ntb_hw_amd.h7
2 files changed, 24 insertions, 6 deletions
diff --git a/drivers/ntb/hw/amd/ntb_hw_amd.c b/drivers/ntb/hw/amd/ntb_hw_amd.c
index e9286cf241f0..156c2a18a239 100644
--- a/drivers/ntb/hw/amd/ntb_hw_amd.c
+++ b/drivers/ntb/hw/amd/ntb_hw_amd.c
@@ -78,7 +78,7 @@ static int ndev_mw_to_bar(struct amd_ntb_dev *ndev, int idx)
if (idx < 0 || idx > ndev->mw_count)
return -EINVAL;
- return 1 << idx;
+ return ndev->dev_data->mw_idx << idx;
}
static int amd_ntb_mw_count(struct ntb_dev *ntb, int pidx)
@@ -909,7 +909,7 @@ static int amd_init_ntb(struct amd_ntb_dev *ndev)
{
void __iomem *mmio = ndev->self_mmio;
- ndev->mw_count = AMD_MW_CNT;
+ ndev->mw_count = ndev->dev_data->mw_count;
ndev->spad_count = AMD_SPADS_CNT;
ndev->db_count = AMD_DB_CNT;
@@ -1069,6 +1069,8 @@ static int amd_ntb_pci_probe(struct pci_dev *pdev,
goto err_ndev;
}
+ ndev->dev_data = (struct ntb_dev_data *)id->driver_data;
+
ndev_init_struct(ndev, pdev);
rc = amd_ntb_init_pci(ndev, pdev);
@@ -1123,10 +1125,21 @@ static const struct file_operations amd_ntb_debugfs_info = {
.read = ndev_debugfs_read,
};
+static const struct ntb_dev_data dev_data[] = {
+ { /* for device 145b */
+ .mw_count = 3,
+ .mw_idx = 1,
+ },
+ { /* for device 148b */
+ .mw_count = 2,
+ .mw_idx = 2,
+ },
+};
+
static const struct pci_device_id amd_ntb_pci_tbl[] = {
- {PCI_VDEVICE(AMD, 0x145b)},
- {PCI_VDEVICE(AMD, 0x148b)},
- {0}
+ { PCI_VDEVICE(AMD, 0x145b), (kernel_ulong_t)&dev_data[0] },
+ { PCI_VDEVICE(AMD, 0x148b), (kernel_ulong_t)&dev_data[1] },
+ { 0, }
};
MODULE_DEVICE_TABLE(pci, amd_ntb_pci_tbl);
diff --git a/drivers/ntb/hw/amd/ntb_hw_amd.h b/drivers/ntb/hw/amd/ntb_hw_amd.h
index 3aac994f3e77..139a307147bc 100644
--- a/drivers/ntb/hw/amd/ntb_hw_amd.h
+++ b/drivers/ntb/hw/amd/ntb_hw_amd.h
@@ -92,7 +92,6 @@ static inline void _write64(u64 val, void __iomem *mmio)
enum {
/* AMD NTB Capability */
- AMD_MW_CNT = 3,
AMD_DB_CNT = 16,
AMD_MSIX_VECTOR_CNT = 24,
AMD_SPADS_CNT = 16,
@@ -169,6 +168,11 @@ enum {
AMD_PEER_OFFSET = 0x400,
};
+struct ntb_dev_data {
+ const unsigned char mw_count;
+ const unsigned int mw_idx;
+};
+
struct amd_ntb_dev;
struct amd_ntb_vec {
@@ -184,6 +188,7 @@ struct amd_ntb_dev {
u32 cntl_sta;
u32 peer_sta;
+ struct ntb_dev_data *dev_data;
unsigned char mw_count;
unsigned char spad_count;
unsigned char db_count;