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path: root/drivers/ntb/ntb_transport.c
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Diffstat (limited to 'drivers/ntb/ntb_transport.c')
-rw-r--r--drivers/ntb/ntb_transport.c78
1 files changed, 49 insertions, 29 deletions
diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c
index c3089151aa49..f7380e959656 100644
--- a/drivers/ntb/ntb_transport.c
+++ b/drivers/ntb/ntb_transport.c
@@ -64,7 +64,7 @@ static unsigned int transport_mtu = 0x401E;
module_param(transport_mtu, uint, 0644);
MODULE_PARM_DESC(transport_mtu, "Maximum size of NTB transport packets");
-static unsigned char max_num_clients = 2;
+static unsigned char max_num_clients;
module_param(max_num_clients, byte, 0644);
MODULE_PARM_DESC(max_num_clients, "Maximum number of NTB transport clients");
@@ -150,7 +150,7 @@ struct ntb_transport {
struct list_head client_devs;
struct ntb_device *ndev;
- struct ntb_transport_mw mw[NTB_NUM_MW];
+ struct ntb_transport_mw *mw;
struct ntb_transport_qp *qps;
unsigned int max_qps;
unsigned long qp_bitmap;
@@ -182,7 +182,7 @@ enum {
MAX_SPAD,
};
-#define QP_TO_MW(qp) ((qp) % NTB_NUM_MW)
+#define QP_TO_MW(ndev, qp) ((qp) % ntb_max_mw(ndev))
#define NTB_QP_DEF_NUM_ENTRIES 100
#define NTB_LINK_DOWN_TIMEOUT 10
@@ -474,19 +474,22 @@ static void ntb_transport_setup_qp_mw(struct ntb_transport *nt,
{
struct ntb_transport_qp *qp = &nt->qps[qp_num];
unsigned int rx_size, num_qps_mw;
- u8 mw_num = QP_TO_MW(qp_num);
+ u8 mw_num, mw_max;
unsigned int i;
+ mw_max = ntb_max_mw(nt->ndev);
+ mw_num = QP_TO_MW(nt->ndev, qp_num);
+
WARN_ON(nt->mw[mw_num].virt_addr == NULL);
- if (nt->max_qps % NTB_NUM_MW && mw_num < nt->max_qps % NTB_NUM_MW)
- num_qps_mw = nt->max_qps / NTB_NUM_MW + 1;
+ if (nt->max_qps % mw_max && mw_num < nt->max_qps % mw_max)
+ num_qps_mw = nt->max_qps / mw_max + 1;
else
- num_qps_mw = nt->max_qps / NTB_NUM_MW;
+ num_qps_mw = nt->max_qps / mw_max;
rx_size = (unsigned int) nt->mw[mw_num].size / num_qps_mw;
qp->remote_rx_info = nt->mw[mw_num].virt_addr +
- (qp_num / NTB_NUM_MW * rx_size);
+ (qp_num / mw_max * rx_size);
rx_size -= sizeof(struct ntb_rx_info);
qp->rx_buff = qp->remote_rx_info + 1;
@@ -630,7 +633,7 @@ static void ntb_transport_link_work(struct work_struct *work)
int rc, i;
/* send the local info, in the opposite order of the way we read it */
- for (i = 0; i < NTB_NUM_MW; i++) {
+ for (i = 0; i < ntb_max_mw(ndev); i++) {
rc = ntb_write_remote_spad(ndev, MW0_SZ_HIGH + (i * 2),
ntb_get_mw_size(ndev, i) >> 32);
if (rc) {
@@ -650,10 +653,10 @@ static void ntb_transport_link_work(struct work_struct *work)
}
}
- rc = ntb_write_remote_spad(ndev, NUM_MWS, NTB_NUM_MW);
+ rc = ntb_write_remote_spad(ndev, NUM_MWS, ntb_max_mw(ndev));
if (rc) {
dev_err(&pdev->dev, "Error writing %x to remote spad %d\n",
- NTB_NUM_MW, NUM_MWS);
+ ntb_max_mw(ndev), NUM_MWS);
goto out;
}
@@ -698,11 +701,11 @@ static void ntb_transport_link_work(struct work_struct *work)
goto out;
}
- if (val != NTB_NUM_MW)
+ if (val != ntb_max_mw(ndev))
goto out;
dev_dbg(&pdev->dev, "Remote number of mws = %d\n", val);
- for (i = 0; i < NTB_NUM_MW; i++) {
+ for (i = 0; i < ntb_max_mw(ndev); i++) {
u64 val64;
rc = ntb_read_remote_spad(ndev, MW0_SZ_HIGH + (i * 2), &val);
@@ -744,7 +747,7 @@ static void ntb_transport_link_work(struct work_struct *work)
return;
out1:
- for (i = 0; i < NTB_NUM_MW; i++)
+ for (i = 0; i < ntb_max_mw(ndev); i++)
ntb_free_mw(nt, i);
out:
if (ntb_hw_link_status(ndev))
@@ -798,7 +801,10 @@ static void ntb_transport_init_queue(struct ntb_transport *nt,
{
struct ntb_transport_qp *qp;
unsigned int num_qps_mw, tx_size;
- u8 mw_num = QP_TO_MW(qp_num);
+ u8 mw_num, mw_max;
+
+ mw_max = ntb_max_mw(nt->ndev);
+ mw_num = QP_TO_MW(nt->ndev, qp_num);
qp = &nt->qps[qp_num];
qp->qp_num = qp_num;
@@ -808,14 +814,14 @@ static void ntb_transport_init_queue(struct ntb_transport *nt,
qp->client_ready = NTB_LINK_DOWN;
qp->event_handler = NULL;
- if (nt->max_qps % NTB_NUM_MW && mw_num < nt->max_qps % NTB_NUM_MW)
- num_qps_mw = nt->max_qps / NTB_NUM_MW + 1;
+ if (nt->max_qps % mw_max && mw_num < nt->max_qps % mw_max)
+ num_qps_mw = nt->max_qps / mw_max + 1;
else
- num_qps_mw = nt->max_qps / NTB_NUM_MW;
+ num_qps_mw = nt->max_qps / mw_max;
tx_size = (unsigned int) ntb_get_mw_size(qp->ndev, mw_num) / num_qps_mw;
qp->rx_info = ntb_get_mw_vbase(nt->ndev, mw_num) +
- (qp_num / NTB_NUM_MW * tx_size);
+ (qp_num / mw_max * tx_size);
tx_size -= sizeof(struct ntb_rx_info);
qp->tx_mw = qp->rx_info + 1;
@@ -862,13 +868,23 @@ int ntb_transport_init(struct pci_dev *pdev)
goto err;
}
- nt->max_qps = min(nt->ndev->max_cbs, max_num_clients);
+ nt->mw = kcalloc(ntb_max_mw(nt->ndev), sizeof(struct ntb_transport_mw),
+ GFP_KERNEL);
+ if (!nt->mw) {
+ rc = -ENOMEM;
+ goto err1;
+ }
+
+ if (max_num_clients)
+ nt->max_qps = min(ntb_max_cbs(nt->ndev), max_num_clients);
+ else
+ nt->max_qps = min(ntb_max_cbs(nt->ndev), ntb_max_mw(nt->ndev));
nt->qps = kcalloc(nt->max_qps, sizeof(struct ntb_transport_qp),
GFP_KERNEL);
if (!nt->qps) {
rc = -ENOMEM;
- goto err1;
+ goto err2;
}
nt->qp_bitmap = ((u64) 1 << nt->max_qps) - 1;
@@ -882,22 +898,24 @@ int ntb_transport_init(struct pci_dev *pdev)
rc = ntb_register_event_callback(nt->ndev,
ntb_transport_event_callback);
if (rc)
- goto err2;
+ goto err3;
INIT_LIST_HEAD(&nt->client_devs);
rc = ntb_bus_init(nt);
if (rc)
- goto err3;
+ goto err4;
if (ntb_hw_link_status(nt->ndev))
schedule_delayed_work(&nt->link_work, 0);
return 0;
-err3:
+err4:
ntb_unregister_event_callback(nt->ndev);
-err2:
+err3:
kfree(nt->qps);
+err2:
+ kfree(nt->mw);
err1:
ntb_unregister_transport(nt->ndev);
err:
@@ -908,6 +926,7 @@ err:
void ntb_transport_free(void *transport)
{
struct ntb_transport *nt = transport;
+ struct ntb_device *ndev = nt->ndev;
struct pci_dev *pdev;
int i;
@@ -924,15 +943,16 @@ void ntb_transport_free(void *transport)
cancel_delayed_work_sync(&nt->link_work);
- ntb_unregister_event_callback(nt->ndev);
+ ntb_unregister_event_callback(ndev);
- pdev = ntb_query_pdev(nt->ndev);
+ pdev = ntb_query_pdev(ndev);
- for (i = 0; i < NTB_NUM_MW; i++)
+ for (i = 0; i < ntb_max_mw(ndev); i++)
ntb_free_mw(nt, i);
kfree(nt->qps);
- ntb_unregister_transport(nt->ndev);
+ kfree(nt->mw);
+ ntb_unregister_transport(ndev);
kfree(nt);
}
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-26 12:49:50 +0300