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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>
This commit is contained in:
Alexandre Bounine 2012-10-04 17:16:00 -07:00 committed by Linus Torvalds
parent da1589f073
commit 71afe34171
2 changed files with 99 additions and 4 deletions
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88
drivers/rapidio/devices/tsi721.c
View File

@ -861,6 +861,90 @@ static void tsi721_init_pc2sr_mapping(struct tsi721_device *priv)
iowrite32(0, priv->regs + TSI721_OBWINLB(i));
}
/**
* 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.
@ -874,7 +958,7 @@ 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_IBWINLB(i));
iowrite32(0, priv->regs + TSI721_IBWIN_LB(i));
}
/**
@ -2144,6 +2228,8 @@ static int __devinit tsi721_setup_mport(struct tsi721_device *priv)
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) {

15
drivers/rapidio/devices/tsi721.h
View File

@ -156,9 +156,18 @@
#define TSI721_IBWIN_NUM 8
#define TSI721_IBWINLB(x) (0x29000 + (x) * 0x20)
#define TSI721_IBWINLB_BA 0xfffff000
#define TSI721_IBWINLB_WEN 0x00000001
#define TSI721_IBWIN_LB(x) (0x29000 + (x) * 0x20)
#define TSI721_IBWIN_LB_BA 0xfffff000
#define TSI721_IBWIN_LB_WEN 0x00000001
#define TSI721_IBWIN_UB(x) (0x29004 + (x) * 0x20)
#define TSI721_IBWIN_SZ(x) (0x29008 + (x) * 0x20)
#define TSI721_IBWIN_SZ_SIZE 0x00001f00
#define TSI721_IBWIN_SIZE(size) (__fls(size) - 12)
#define TSI721_IBWIN_TLA(x) (0x2900c + (x) * 0x20)
#define TSI721_IBWIN_TLA_ADD 0xfffff000
#define TSI721_IBWIN_TUA(x) (0x29010 + (x) * 0x20)
#define TSI721_SR2PC_GEN_INTE 0x29800
#define TSI721_SR2PC_PWE 0x29804