Current definition of map_inb() mport operations callback uses u32 type to
specify required inbound window (IBW) size. This is limiting factor
because existing hardware - tsi721 and fsl_rio, both support IBW size
up to 16GB.
Changing type of size parameter to u64 to allow IBW size configurations
larger than 4GB.
Signed-off-by: Alexandre Bounine <alexandre.boun...@idt.com>
Cc: Matt Porter <mpor...@kernel.crashing.org>
Cc: Benjamin Herrenschmidt <b...@kernel.crashing.org>
Cc: Michael Ellerman <m...@ellerman.id.au>
Cc: Andre van Herk <andre.van.h...@prodrive-technologies.com>
Cc: Barry Wood <barry.w...@idt.com>
Cc: linux-kernel@vger.kernel.org
Cc: linuxppc-...@lists.ozlabs.org
---
arch/powerpc/sysdev/fsl_rio.c | 4 ++--
drivers/rapidio/devices/tsi721.c | 14 +++++++++-----
include/linux/rio.h | 2 +-
3 files changed, 12 insertions(+), 8 deletions(-)
diff --git a/arch/powerpc/sysdev/fsl_rio.c b/arch/powerpc/sysdev/fsl_rio.c
index f5bf38b9..1958838 100644
--- a/arch/powerpc/sysdev/fsl_rio.c
+++ b/arch/powerpc/sysdev/fsl_rio.c
@@ -289,7 +289,7 @@ static void fsl_rio_inbound_mem_init(struct rio_priv *priv)
}
int fsl_map_inb_mem(struct rio_mport *mport, dma_addr_t lstart,
- u64 rstart, u32 size, u32 flags)
+ u64 rstart, u64 size, u32 flags)
{
struct rio_priv *priv = mport->priv;
u32 base_size;
@@ -298,7 +298,7 @@ int fsl_map_inb_mem(struct rio_mport *mport, dma_addr_t
lstart,
u32 riwar;
int i;
- if ((size & (size - 1)) != 0)
+ if ((size & (size - 1)) != 0 || size > 0x400000000UL)
return -EINVAL;
base_size_log = ilog2(size);
diff --git a/drivers/rapidio/devices/tsi721.c b/drivers/rapidio/devices/tsi721.c
index 8e07cd5..53daf63 100644
--- a/drivers/rapidio/devices/tsi721.c
+++ b/drivers/rapidio/devices/tsi721.c
@@ -1090,7 +1090,7 @@ static void tsi721_init_pc2sr_mapping(struct
tsi721_device *priv)
* 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)
+ u64 rstart, u64 size, u32 flags)
{
struct tsi721_device *priv = mport->priv;
int i, avail = -1;
@@ -1103,6 +1103,10 @@ static int tsi721_rio_map_inb_mem(struct rio_mport
*mport, dma_addr_t lstart,
struct tsi721_ib_win_mapping *map = NULL;
int ret = -EBUSY;
+ /* Max IBW size supported by HW is 16GB */
+ if (size > 0x400000000UL)
+ return -EINVAL;
+
if (direct) {
/* Calculate minimal acceptable window size and base address */
@@ -1110,15 +1114,15 @@ static int tsi721_rio_map_inb_mem(struct rio_mport
*mport, dma_addr_t lstart,
ibw_start = lstart & ~(ibw_size - 1);
tsi_debug(IBW, &priv->pdev->dev,
- "Direct (RIO_0x%llx -> PCIe_%pad), size=0x%x, ibw_start
= 0x%llx",
+ "Direct (RIO_0x%llx -> PCIe_%pad), size=0x%llx,
ibw_start = 0x%llx",
rstart, &lstart, size, ibw_start);
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 */
+ /* Check for crossing IBW max size 16GB */
+ if (ibw_size > 0x400000000UL)
return -EBUSY;
- }
}
loc_start = ibw_start;
@@ -1129,7 +1133,7 @@ static int tsi721_rio_map_inb_mem(struct rio_mport
*mport, dma_addr_t lstart,
} else {
tsi_debug(IBW, &priv->pdev->dev,
- "Translated (RIO_0x%llx -> PCIe_%pad), size=0x%x",
+ "Translated (RIO_0x%llx -> PCIe_%pad), size=0x%llx",
rstart, &lstart, size);
if (!is_power_of_2(size) || size < 0x1000 ||
diff --git a/include/linux/rio.h b/include/linux/rio.h
index aa23238..f7ec35b 100644
--- a/include/linux/rio.h
+++ b/include/linux/rio.h
@@ -425,7 +425,7 @@ struct rio_ops {
int (*add_inb_buffer)(struct rio_mport *mport, int mbox, void *buf);
void *(*get_inb_message)(struct rio_mport *mport, int mbox);
int (*map_inb)(struct rio_mport *mport, dma_addr_t lstart,
- u64 rstart, u32 size, u32 flags);
+ u64 rstart, u64 size, u32 flags);
void (*unmap_inb)(struct rio_mport *mport, dma_addr_t lstart);
int (*query_mport)(struct rio_mport *mport,
struct rio_mport_attr *attr);
--
1.7.8.4
