diff options
| -rw-r--r-- | drivers/ntb/hw/mscc/ntb_hw_switchtec.c | 72 |
1 files changed, 43 insertions, 29 deletions
diff --git a/drivers/ntb/hw/mscc/ntb_hw_switchtec.c b/drivers/ntb/hw/mscc/ntb_hw_switchtec.c index 51fec6497164..b18e938312e1 100644 --- a/drivers/ntb/hw/mscc/ntb_hw_switchtec.c +++ b/drivers/ntb/hw/mscc/ntb_hw_switchtec.c @@ -847,6 +847,46 @@ static int switchtec_ntb_init_sndev(struct switchtec_ntb *sndev) return 0; } +static int config_rsvd_lut_win(struct switchtec_ntb *sndev, + struct ntb_ctrl_regs __iomem *ctl, + int lut_idx, int partition, + dma_addr_t addr) +{ + int peer_bar = sndev->peer_direct_mw_to_bar[0]; + u32 ctl_val; + int rc; + + rc = switchtec_ntb_part_op(sndev, ctl, NTB_CTRL_PART_OP_LOCK, + NTB_CTRL_PART_STATUS_LOCKED); + if (rc) + return rc; + + ctl_val = ioread32(&ctl->bar_entry[peer_bar].ctl); + ctl_val &= 0xFF; + ctl_val |= NTB_CTRL_BAR_LUT_WIN_EN; + ctl_val |= ilog2(LUT_SIZE) << 8; + ctl_val |= (sndev->nr_lut_mw - 1) << 14; + iowrite32(ctl_val, &ctl->bar_entry[peer_bar].ctl); + + iowrite64((NTB_CTRL_LUT_EN | (partition << 1) | addr), + &ctl->lut_entry[lut_idx]); + + rc = switchtec_ntb_part_op(sndev, ctl, NTB_CTRL_PART_OP_CFG, + NTB_CTRL_PART_STATUS_NORMAL); + if (rc) { + u32 bar_error, lut_error; + + bar_error = ioread32(&ctl->bar_error); + lut_error = ioread32(&ctl->lut_error); + dev_err(&sndev->stdev->dev, + "Error setting up reserved lut window: %08x / %08x\n", + bar_error, lut_error); + return rc; + } + + return 0; +} + static int map_bars(int *map, struct ntb_ctrl_regs __iomem *ctrl) { int i; @@ -1004,10 +1044,7 @@ static void switchtec_ntb_init_shared(struct switchtec_ntb *sndev) static int switchtec_ntb_init_shared_mw(struct switchtec_ntb *sndev) { - struct ntb_ctrl_regs __iomem *ctl = sndev->mmio_peer_ctrl; int self_bar = sndev->direct_mw_to_bar[0]; - int peer_bar = sndev->peer_direct_mw_to_bar[0]; - u32 ctl_val; int rc; sndev->nr_rsvd_luts++; @@ -1023,35 +1060,12 @@ static int switchtec_ntb_init_shared_mw(struct switchtec_ntb *sndev) switchtec_ntb_init_shared(sndev); - rc = switchtec_ntb_part_op(sndev, ctl, NTB_CTRL_PART_OP_LOCK, - NTB_CTRL_PART_STATUS_LOCKED); + rc = config_rsvd_lut_win(sndev, sndev->mmio_peer_ctrl, 0, + sndev->self_partition, + sndev->self_shared_dma); if (rc) goto unalloc_and_exit; - ctl_val = ioread32(&ctl->bar_entry[peer_bar].ctl); - ctl_val &= 0xFF; - ctl_val |= NTB_CTRL_BAR_LUT_WIN_EN; - ctl_val |= ilog2(LUT_SIZE) << 8; - ctl_val |= (sndev->nr_lut_mw - 1) << 14; - iowrite32(ctl_val, &ctl->bar_entry[peer_bar].ctl); - - iowrite64((NTB_CTRL_LUT_EN | (sndev->self_partition << 1) | - sndev->self_shared_dma), - &ctl->lut_entry[0]); - - rc = switchtec_ntb_part_op(sndev, ctl, NTB_CTRL_PART_OP_CFG, - NTB_CTRL_PART_STATUS_NORMAL); - if (rc) { - u32 bar_error, lut_error; - - bar_error = ioread32(&ctl->bar_error); - lut_error = ioread32(&ctl->lut_error); - dev_err(&sndev->stdev->dev, - "Error setting up shared MW: %08x / %08x\n", - bar_error, lut_error); - goto unalloc_and_exit; - } - sndev->peer_shared = pci_iomap(sndev->stdev->pdev, self_bar, LUT_SIZE); if (!sndev->peer_shared) { rc = -ENOMEM; |