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-rw-r--r--drivers/rapidio/devices/tsi721.c72
-rw-r--r--drivers/rapidio/devices/tsi721.h11
2 files changed, 62 insertions, 21 deletions
diff --git a/drivers/rapidio/devices/tsi721.c b/drivers/rapidio/devices/tsi721.c
index f57ee9d69910..b96f0b97dc3a 100644
--- a/drivers/rapidio/devices/tsi721.c
+++ b/drivers/rapidio/devices/tsi721.c
@@ -885,26 +885,52 @@ static int tsi721_rio_map_inb_mem(struct rio_mport *mport, dma_addr_t lstart,
u64 rstart, u32 size, u32 flags)
{
struct tsi721_device *priv = mport->priv;
- int i;
+ int i, avail = -1;
u32 regval;
+ struct tsi721_ib_win *ib_win;
+ int ret = -EBUSY;
if (!is_power_of_2(size) || size < 0x1000 ||
((u64)lstart & (size - 1)) || (rstart & (size - 1)))
return -EINVAL;
- /* Search for free inbound translation window */
+ spin_lock(&priv->win_lock);
+ /*
+ * Scan for overlapping with active regions and mark the first available
+ * IB window at the same time.
+ */
for (i = 0; i < TSI721_IBWIN_NUM; i++) {
- regval = ioread32(priv->regs + TSI721_IBWIN_LB(i));
- if (!(regval & TSI721_IBWIN_LB_WEN))
+ ib_win = &priv->ib_win[i];
+ if (!ib_win->active) {
+ if (avail == -1) {
+ avail = i;
+ ret = 0;
+ }
+ } else if (rstart < (ib_win->rstart + ib_win->size) &&
+ (rstart + size) > ib_win->rstart) {
+ ret = -EFAULT;
break;
+ }
}
- if (i >= TSI721_IBWIN_NUM) {
- dev_err(&priv->pdev->dev,
- "Unable to find free inbound window\n");
- return -EBUSY;
+ if (ret)
+ goto err_out;
+ i = avail;
+
+ /* Sanity check: available IB window must be disabled at this point */
+ regval = ioread32(priv->regs + TSI721_IBWIN_LB(i));
+ if (WARN_ON(regval & TSI721_IBWIN_LB_WEN)) {
+ ret = -EIO;
+ goto err_out;
}
+ ib_win = &priv->ib_win[i];
+ ib_win->active = true;
+ ib_win->rstart = rstart;
+ ib_win->lstart = lstart;
+ ib_win->size = size;
+ spin_unlock(&priv->win_lock);
+
iowrite32(TSI721_IBWIN_SIZE(size) << 8,
priv->regs + TSI721_IBWIN_SZ(i));
@@ -920,6 +946,9 @@ static int tsi721_rio_map_inb_mem(struct rio_mport *mport, dma_addr_t lstart,
i, rstart, (unsigned long long)lstart);
return 0;
+err_out:
+ spin_unlock(&priv->win_lock);
+ return ret;
}
/**
@@ -931,25 +960,25 @@ static void tsi721_rio_unmap_inb_mem(struct rio_mport *mport,
dma_addr_t lstart)
{
struct tsi721_device *priv = mport->priv;
+ struct tsi721_ib_win *ib_win;
int i;
- u64 addr;
- u32 regval;
/* Search for matching active inbound translation window */
+ spin_lock(&priv->win_lock);
for (i = 0; i < TSI721_IBWIN_NUM; i++) {
- regval = ioread32(priv->regs + TSI721_IBWIN_LB(i));
- if (regval & TSI721_IBWIN_LB_WEN) {
- regval = ioread32(priv->regs + TSI721_IBWIN_TUA(i));
- addr = (u64)regval << 32;
- regval = ioread32(priv->regs + TSI721_IBWIN_TLA(i));
- addr |= regval & TSI721_IBWIN_TLA_ADD;
-
- if (addr == (u64)lstart) {
- iowrite32(0, priv->regs + TSI721_IBWIN_LB(i));
- break;
- }
+ ib_win = &priv->ib_win[i];
+ if (ib_win->active && ib_win->lstart == lstart) {
+ iowrite32(0, priv->regs + TSI721_IBWIN_LB(i));
+ ib_win->active = false;
+ break;
}
}
+ spin_unlock(&priv->win_lock);
+
+ if (i == TSI721_IBWIN_NUM)
+ dev_err(&priv->pdev->dev,
+ "IB window mapped to %llx not found\n",
+ (unsigned long long)lstart);
}
/**
@@ -966,6 +995,7 @@ static void tsi721_init_sr2pc_mapping(struct tsi721_device *priv)
/* Disable all SR2PC inbound windows */
for (i = 0; i < TSI721_IBWIN_NUM; i++)
iowrite32(0, priv->regs + TSI721_IBWIN_LB(i));
+ spin_lock_init(&priv->win_lock);
}
/**
diff --git a/drivers/rapidio/devices/tsi721.h b/drivers/rapidio/devices/tsi721.h
index 9d2502543ef6..355f356e5347 100644
--- a/drivers/rapidio/devices/tsi721.h
+++ b/drivers/rapidio/devices/tsi721.h
@@ -808,6 +808,13 @@ struct msix_irq {
};
#endif /* CONFIG_PCI_MSI */
+struct tsi721_ib_win {
+ u64 rstart;
+ u32 size;
+ dma_addr_t lstart;
+ bool active;
+};
+
struct tsi721_device {
struct pci_dev *pdev;
struct rio_mport *mport;
@@ -843,6 +850,10 @@ struct tsi721_device {
/* Outbound Messaging */
int omsg_init[TSI721_OMSG_CHNUM];
struct tsi721_omsg_ring omsg_ring[TSI721_OMSG_CHNUM];
+
+ /* Inbound Mapping Windows */
+ struct tsi721_ib_win ib_win[TSI721_IBWIN_NUM];
+ spinlock_t win_lock;
};
#ifdef CONFIG_RAPIDIO_DMA_ENGINE