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-rw-r--r--drivers/ntb/hw/mscc/ntb_hw_switchtec.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/ntb/hw/mscc/ntb_hw_switchtec.c b/drivers/ntb/hw/mscc/ntb_hw_switchtec.c
index 088ae220ecb4..51fec6497164 100644
--- a/drivers/ntb/hw/mscc/ntb_hw_switchtec.c
+++ b/drivers/ntb/hw/mscc/ntb_hw_switchtec.c
@@ -109,6 +109,7 @@ struct switchtec_ntb {
int nr_direct_mw;
int nr_lut_mw;
+ int nr_rsvd_luts;
int direct_mw_to_bar[MAX_DIRECT_MW];
int peer_nr_direct_mw;
@@ -197,7 +198,7 @@ static int switchtec_ntb_mw_count(struct ntb_dev *ntb, int pidx)
{
struct switchtec_ntb *sndev = ntb_sndev(ntb);
int nr_direct_mw = sndev->peer_nr_direct_mw;
- int nr_lut_mw = sndev->peer_nr_lut_mw - 1;
+ int nr_lut_mw = sndev->peer_nr_lut_mw - sndev->nr_rsvd_luts;
if (pidx != NTB_DEF_PEER_IDX)
return -EINVAL;
@@ -210,12 +211,12 @@ static int switchtec_ntb_mw_count(struct ntb_dev *ntb, int pidx)
static int lut_index(struct switchtec_ntb *sndev, int mw_idx)
{
- return mw_idx - sndev->nr_direct_mw + 1;
+ return mw_idx - sndev->nr_direct_mw + sndev->nr_rsvd_luts;
}
static int peer_lut_index(struct switchtec_ntb *sndev, int mw_idx)
{
- return mw_idx - sndev->peer_nr_direct_mw + 1;
+ return mw_idx - sndev->peer_nr_direct_mw + sndev->nr_rsvd_luts;
}
static int switchtec_ntb_mw_get_align(struct ntb_dev *ntb, int pidx,
@@ -355,8 +356,9 @@ static int switchtec_ntb_mw_set_trans(struct ntb_dev *ntb, int pidx, int widx,
static int switchtec_ntb_peer_mw_count(struct ntb_dev *ntb)
{
struct switchtec_ntb *sndev = ntb_sndev(ntb);
+ int nr_lut_mw = sndev->nr_lut_mw - sndev->nr_rsvd_luts;
- return sndev->nr_direct_mw + (use_lut_mws ? sndev->nr_lut_mw - 1 : 0);
+ return sndev->nr_direct_mw + (use_lut_mws ? nr_lut_mw : 0);
}
static int switchtec_ntb_direct_get_addr(struct switchtec_ntb *sndev,
@@ -1008,6 +1010,7 @@ static int switchtec_ntb_init_shared_mw(struct switchtec_ntb *sndev)
u32 ctl_val;
int rc;
+ sndev->nr_rsvd_luts++;
sndev->self_shared = dma_zalloc_coherent(&sndev->stdev->pdev->dev,
LUT_SIZE,
&sndev->self_shared_dma,
@@ -1074,6 +1077,7 @@ static void switchtec_ntb_deinit_shared_mw(struct switchtec_ntb *sndev)
dma_free_coherent(&sndev->stdev->pdev->dev, LUT_SIZE,
sndev->self_shared,
sndev->self_shared_dma);
+ sndev->nr_rsvd_luts--;
}
static irqreturn_t switchtec_ntb_doorbell_isr(int irq, void *dev)