rapidio/tsi721: add inbound memory mapping callbacks
Add Tsi721 routines to support RapidIO subsystem's inbound memory mapping
interface (RapidIO to system's local memory).
Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Li Yang <leoli@freescale.com>
Cc: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/rapidio/devices/tsi721.c b/drivers/rapidio/devices/tsi721.c
index 78dff6f..38ecd8f 100644
--- a/drivers/rapidio/devices/tsi721.c
+++ b/drivers/rapidio/devices/tsi721.c
@@ -862,6 +862,90 @@
}
/**
+ * tsi721_rio_map_inb_mem -- Mapping inbound memory region.
+ * @mport: RapidIO master port
+ * @lstart: Local memory space start address.
+ * @rstart: RapidIO space start address.
+ * @size: The mapping region size.
+ * @flags: Flags for mapping. 0 for using default flags.
+ *
+ * Return: 0 -- Success.
+ *
+ * This function will create the inbound mapping
+ * from rstart to lstart.
+ */
+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;
+ u32 regval;
+
+ if (!is_power_of_2(size) || size < 0x1000 ||
+ ((u64)lstart & (size - 1)) || (rstart & (size - 1)))
+ return -EINVAL;
+
+ /* Search for free inbound translation window */
+ for (i = 0; i < TSI721_IBWIN_NUM; i++) {
+ regval = ioread32(priv->regs + TSI721_IBWIN_LB(i));
+ if (!(regval & TSI721_IBWIN_LB_WEN))
+ break;
+ }
+
+ if (i >= TSI721_IBWIN_NUM) {
+ dev_err(&priv->pdev->dev,
+ "Unable to find free inbound window\n");
+ return -EBUSY;
+ }
+
+ iowrite32(TSI721_IBWIN_SIZE(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),
+ 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,
+ priv->regs + TSI721_IBWIN_LB(i));
+ dev_dbg(&priv->pdev->dev,
+ "Configured IBWIN%d mapping (RIO_0x%llx -> PCIe_0x%llx)\n",
+ i, rstart, (unsigned long long)lstart);
+
+ return 0;
+}
+
+/**
+ * fsl_rio_unmap_inb_mem -- Unmapping inbound memory region.
+ * @mport: RapidIO master port
+ * @lstart: Local memory space start address.
+ */
+static void tsi721_rio_unmap_inb_mem(struct rio_mport *mport,
+ dma_addr_t lstart)
+{
+ struct tsi721_device *priv = mport->priv;
+ int i;
+ u64 addr;
+ u32 regval;
+
+ /* Search for matching active inbound translation window */
+ 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;
+ }
+ }
+ }
+}
+
+/**
* tsi721_init_sr2pc_mapping - initializes inbound (SRIO->PCIe)
* translation regions.
* @priv: pointer to tsi721 private data
@@ -874,7 +958,7 @@
/* Disable all SR2PC inbound windows */
for (i = 0; i < TSI721_IBWIN_NUM; i++)
- iowrite32(0, priv->regs + TSI721_IBWINLB(i));
+ iowrite32(0, priv->regs + TSI721_IBWIN_LB(i));
}
/**
@@ -2144,6 +2228,8 @@
ops->add_outb_message = tsi721_add_outb_message;
ops->add_inb_buffer = tsi721_add_inb_buffer;
ops->get_inb_message = tsi721_get_inb_message;
+ ops->map_inb = tsi721_rio_map_inb_mem;
+ ops->unmap_inb = tsi721_rio_unmap_inb_mem;
mport = kzalloc(sizeof(struct rio_mport), GFP_KERNEL);
if (!mport) {