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-rw-r--r--drivers/rapidio/devices/tsi721.c163
-rw-r--r--drivers/rapidio/devices/tsi721.h9
2 files changed, 142 insertions, 30 deletions
diff --git a/drivers/rapidio/devices/tsi721.c b/drivers/rapidio/devices/tsi721.c
index b96f0b97dc3a..d463d2cbd0af 100644
--- a/drivers/rapidio/devices/tsi721.c
+++ b/drivers/rapidio/devices/tsi721.c
@@ -888,71 +888,145 @@ static int tsi721_rio_map_inb_mem(struct rio_mport *mport, dma_addr_t lstart,
int i, avail = -1;
u32 regval;
struct tsi721_ib_win *ib_win;
+ bool direct = (lstart == rstart);
+ u64 ibw_size;
+ dma_addr_t loc_start;
+ u64 ibw_start;
+ struct tsi721_ib_win_mapping *map = NULL;
int ret = -EBUSY;
- if (!is_power_of_2(size) || size < 0x1000 ||
- ((u64)lstart & (size - 1)) || (rstart & (size - 1)))
- return -EINVAL;
+ if (direct) {
+ dev_dbg(&priv->pdev->dev,
+ "Direct (RIO_0x%llx -> PCIe_0x%pad), size=0x%x",
+ rstart, &lstart, size);
+
+ /* Calculate minimal acceptable window size and base address */
+
+ ibw_size = roundup_pow_of_two(size);
+ ibw_start = lstart & ~(ibw_size - 1);
+
+ while ((lstart + size) > (ibw_start + ibw_size)) {
+ ibw_size *= 2;
+ ibw_start = lstart & ~(ibw_size - 1);
+ if (ibw_size > 0x80000000) { /* Limit max size to 2GB */
+ return -EBUSY;
+ }
+ }
+
+ loc_start = ibw_start;
+
+ map = kzalloc(sizeof(struct tsi721_ib_win_mapping), GFP_ATOMIC);
+ if (map == NULL)
+ return -ENOMEM;
+
+ } else {
+ dev_dbg(&priv->pdev->dev,
+ "Translated (RIO_0x%llx -> PCIe_0x%pad), size=0x%x",
+ rstart, &lstart, size);
+
+ if (!is_power_of_2(size) || size < 0x1000 ||
+ ((u64)lstart & (size - 1)) || (rstart & (size - 1)))
+ return -EINVAL;
+ if (priv->ibwin_cnt == 0)
+ return -EBUSY;
+ ibw_start = rstart;
+ ibw_size = size;
+ loc_start = lstart;
+ }
- 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++) {
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) {
+ } else if (ibw_start < (ib_win->rstart + ib_win->size) &&
+ (ibw_start + ibw_size) > ib_win->rstart) {
+ /* Return error if address translation involved */
+ if (direct && ib_win->xlat) {
+ ret = -EFAULT;
+ break;
+ }
+
+ /*
+ * Direct mappings usually are larger than originally
+ * requested fragments - check if this new request fits
+ * into it.
+ */
+ if (rstart >= ib_win->rstart &&
+ (rstart + size) <= (ib_win->rstart +
+ ib_win->size)) {
+ /* We are in - no further mapping required */
+ map->lstart = lstart;
+ list_add_tail(&map->node, &ib_win->mappings);
+ return 0;
+ }
+
ret = -EFAULT;
break;
}
}
if (ret)
- goto err_out;
+ goto 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;
+ goto 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);
+ ib_win->rstart = ibw_start;
+ ib_win->lstart = loc_start;
+ ib_win->size = ibw_size;
+ ib_win->xlat = (lstart != rstart);
+ INIT_LIST_HEAD(&ib_win->mappings);
- iowrite32(TSI721_IBWIN_SIZE(size) << 8,
+ /*
+ * When using direct IBW mapping and have larger than requested IBW size
+ * we can have multiple local memory blocks mapped through the same IBW
+ * To handle this situation we maintain list of "clients" for such IBWs.
+ */
+ if (direct) {
+ map->lstart = lstart;
+ list_add_tail(&map->node, &ib_win->mappings);
+ }
+
+ iowrite32(TSI721_IBWIN_SIZE(ibw_size) << 8,
priv->regs + TSI721_IBWIN_SZ(i));
- iowrite32(((u64)lstart >> 32), priv->regs + TSI721_IBWIN_TUA(i));
- iowrite32(((u64)lstart & TSI721_IBWIN_TLA_ADD),
+ iowrite32(((u64)loc_start >> 32), priv->regs + TSI721_IBWIN_TUA(i));
+ iowrite32(((u64)loc_start & TSI721_IBWIN_TLA_ADD),
priv->regs + TSI721_IBWIN_TLA(i));
- iowrite32(rstart >> 32, priv->regs + TSI721_IBWIN_UB(i));
- iowrite32((rstart & TSI721_IBWIN_LB_BA) | TSI721_IBWIN_LB_WEN,
+ iowrite32(ibw_start >> 32, priv->regs + TSI721_IBWIN_UB(i));
+ iowrite32((ibw_start & TSI721_IBWIN_LB_BA) | TSI721_IBWIN_LB_WEN,
priv->regs + TSI721_IBWIN_LB(i));
+
+ priv->ibwin_cnt--;
+
dev_dbg(&priv->pdev->dev,
- "Configured IBWIN%d mapping (RIO_0x%llx -> PCIe_0x%llx)\n",
- i, rstart, (unsigned long long)lstart);
+ "Configured IBWIN%d (RIO_0x%llx -> PCIe_0x%llx), size=0x%llx\n",
+ i, ibw_start, (unsigned long long)loc_start, ibw_size);
return 0;
-err_out:
- spin_unlock(&priv->win_lock);
+out:
+ kfree(map);
return ret;
}
/**
- * fsl_rio_unmap_inb_mem -- Unmapping inbound memory region.
+ * tsi721_rio_unmap_inb_mem -- Unmapping inbound memory region.
* @mport: RapidIO master port
* @lstart: Local memory space start address.
*/
@@ -963,22 +1037,53 @@ static void tsi721_rio_unmap_inb_mem(struct rio_mport *mport,
struct tsi721_ib_win *ib_win;
int i;
+ dev_dbg(&priv->pdev->dev,
+ "Unmap IBW mapped to PCIe_0x%pad", &lstart);
+
/* Search for matching active inbound translation window */
- spin_lock(&priv->win_lock);
for (i = 0; i < TSI721_IBWIN_NUM; i++) {
ib_win = &priv->ib_win[i];
- if (ib_win->active && ib_win->lstart == lstart) {
+
+ /* Address translating IBWs must to be an exact march */
+ if (!ib_win->active ||
+ (ib_win->xlat && lstart != ib_win->lstart))
+ continue;
+
+ if (lstart >= ib_win->lstart &&
+ lstart < (ib_win->lstart + ib_win->size)) {
+
+ if (!ib_win->xlat) {
+ struct tsi721_ib_win_mapping *map;
+ int found = 0;
+
+ list_for_each_entry(map,
+ &ib_win->mappings, node) {
+ if (map->lstart == lstart) {
+ list_del(&map->node);
+ kfree(map);
+ found = 1;
+ break;
+ }
+ }
+
+ if (!found)
+ continue;
+
+ if (!list_empty(&ib_win->mappings))
+ break;
+ }
+
+ dev_dbg(&priv->pdev->dev, "Disable IBWIN_%d", i);
iowrite32(0, priv->regs + TSI721_IBWIN_LB(i));
ib_win->active = false;
+ priv->ibwin_cnt++;
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);
+ dev_dbg(&priv->pdev->dev,
+ "IB window mapped to %pad not found", &lstart);
}
/**
@@ -995,7 +1100,7 @@ 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);
+ priv->ibwin_cnt = TSI721_IBWIN_NUM;
}
/**
diff --git a/drivers/rapidio/devices/tsi721.h b/drivers/rapidio/devices/tsi721.h
index 355f356e5347..f81d01149b39 100644
--- a/drivers/rapidio/devices/tsi721.h
+++ b/drivers/rapidio/devices/tsi721.h
@@ -808,11 +808,18 @@ struct msix_irq {
};
#endif /* CONFIG_PCI_MSI */
+struct tsi721_ib_win_mapping {
+ struct list_head node;
+ dma_addr_t lstart;
+};
+
struct tsi721_ib_win {
u64 rstart;
u32 size;
dma_addr_t lstart;
bool active;
+ bool xlat;
+ struct list_head mappings;
};
struct tsi721_device {
@@ -853,7 +860,7 @@ struct tsi721_device {
/* Inbound Mapping Windows */
struct tsi721_ib_win ib_win[TSI721_IBWIN_NUM];
- spinlock_t win_lock;
+ int ibwin_cnt;
};
#ifdef CONFIG_RAPIDIO_DMA_ENGINE
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-14 14:29:01 +0000