[PATCH] fsl-rio: add support for mapping inbound windows
Martijn de Gouw
martijn.de.gouw at prodrive-technologies.com
Tue Aug 5 23:52:32 EST 2014
Add support for mapping and unmapping of inbound rapidio windows.
Signed-off-by: Martijn de Gouw <martijn.de.gouw at prodrive-technologies.com>
---
arch/powerpc/sysdev/fsl_rio.c | 104 +++++++++++++++++++++++++++++++++++++++++
arch/powerpc/sysdev/fsl_rio.h | 13 ++++++
2 files changed, 117 insertions(+)
diff --git a/arch/powerpc/sysdev/fsl_rio.c b/arch/powerpc/sysdev/fsl_rio.c
index c04b718..08d60f1 100644
--- a/arch/powerpc/sysdev/fsl_rio.c
+++ b/arch/powerpc/sysdev/fsl_rio.c
@@ -58,6 +58,19 @@
#define RIO_ISR_AACR 0x10120
#define RIO_ISR_AACR_AA 0x1 /* Accept All ID */
+#define RIWTAR_TRAD_VAL_SHIFT 12
+#define RIWTAR_TRAD_MASK 0x00FFFFFF
+#define RIWBAR_BADD_VAL_SHIFT 12
+#define RIWBAR_BADD_MASK 0x003FFFFF
+#define RIWAR_ENABLE 0x80000000
+#define RIWAR_TGINT_LOCAL 0x00F00000
+#define RIWAR_RDTYP_NO_SNOOP 0x00040000
+#define RIWAR_RDTYP_SNOOP 0x00050000
+#define RIWAR_WRTYP_NO_SNOOP 0x00004000
+#define RIWAR_WRTYP_SNOOP 0x00005000
+#define RIWAR_WRTYP_ALLOC 0x00006000
+#define RIWAR_SIZE_MASK 0x0000003F
+
#define __fsl_read_rio_config(x, addr, err, op) \
__asm__ __volatile__( \
"1: "op" %1,0(%2)\n" \
@@ -266,6 +279,89 @@ fsl_rio_config_write(struct rio_mport *mport, int index, u16 destid,
return 0;
}
+static void fsl_rio_inbound_mem_init(struct rio_priv *priv)
+{
+ int i;
+
+ /* close inbound windows */
+ for (i = 0; i < RIO_INB_ATMU_COUNT; i++)
+ out_be32(&priv->inb_atmu_regs[i].riwar, 0);
+}
+
+int fsl_map_inb_mem(struct rio_mport *mport, dma_addr_t lstart,
+ u64 rstart, u32 size, u32 flags)
+{
+ struct rio_priv *priv = mport->priv;
+ u32 base_size;
+ unsigned int base_size_log;
+ u64 win_start, win_end;
+ u32 riwar;
+ int i;
+
+ if ((size & (size - 1)) != 0)
+ return -EINVAL;
+
+ base_size_log = ilog2(size);
+ base_size = 1 << base_size_log;
+
+ /* check if addresses are aligned with the window size */
+ if (lstart & (base_size - 1))
+ return -EINVAL;
+ if (rstart & (base_size - 1))
+ return -EINVAL;
+
+ /* check for conflicting ranges */
+ for (i = 0; i < RIO_INB_ATMU_COUNT; i++) {
+ riwar = in_be32(&priv->inb_atmu_regs[i].riwar);
+ if ((riwar & RIWAR_ENABLE) == 0)
+ continue;
+ win_start = ((u64)(in_be32(&priv->inb_atmu_regs[i].riwbar) & RIWBAR_BADD_MASK))
+ << RIWBAR_BADD_VAL_SHIFT;
+ win_end = win_start + ((1 << ((riwar & RIWAR_SIZE_MASK) + 1)) - 1);
+ if (rstart < win_end && (rstart + size) > win_start)
+ return -EINVAL;
+ }
+
+ /* find unused atmu */
+ for (i = 0; i < RIO_INB_ATMU_COUNT; i++) {
+ riwar = in_be32(&priv->inb_atmu_regs[i].riwar);
+ if ((riwar & RIWAR_ENABLE) == 0)
+ break;
+ }
+ if (i >= RIO_INB_ATMU_COUNT)
+ return -ENOMEM;
+
+ out_be32(&priv->inb_atmu_regs[i].riwtar, lstart >> RIWTAR_TRAD_VAL_SHIFT);
+ out_be32(&priv->inb_atmu_regs[i].riwbar, rstart >> RIWBAR_BADD_VAL_SHIFT);
+ out_be32(&priv->inb_atmu_regs[i].riwar, RIWAR_ENABLE | RIWAR_TGINT_LOCAL |
+ RIWAR_RDTYP_SNOOP | RIWAR_WRTYP_SNOOP | (base_size_log - 1));
+
+ return 0;
+}
+
+void fsl_unmap_inb_mem(struct rio_mport *mport, dma_addr_t lstart)
+{
+ u32 win_start_shift, base_start_shift;
+ struct rio_priv *priv = mport->priv;
+ u32 riwar, riwtar;
+ int i;
+
+ /* skip default window */
+ base_start_shift = lstart >> RIWTAR_TRAD_VAL_SHIFT;
+ for (i = 0; i < RIO_INB_ATMU_COUNT; i++) {
+ riwar = in_be32(&priv->inb_atmu_regs[i].riwar);
+ if ((riwar & RIWAR_ENABLE) == 0)
+ continue;
+
+ riwtar = in_be32(&priv->inb_atmu_regs[i].riwtar);
+ win_start_shift = riwtar & RIWTAR_TRAD_MASK;
+ if (win_start_shift == base_start_shift) {
+ out_be32(&priv->inb_atmu_regs[i].riwar, riwar & ~RIWAR_ENABLE);
+ return;
+ }
+ }
+}
+
void fsl_rio_port_error_handler(int offset)
{
/*XXX: Error recovery is not implemented, we just clear errors */
@@ -389,6 +485,8 @@ int fsl_rio_setup(struct platform_device *dev)
ops->add_outb_message = fsl_add_outb_message;
ops->add_inb_buffer = fsl_add_inb_buffer;
ops->get_inb_message = fsl_get_inb_message;
+ ops->map_inb = fsl_map_inb_mem;
+ ops->unmap_inb = fsl_unmap_inb_mem;
rmu_node = of_parse_phandle(dev->dev.of_node, "fsl,srio-rmu-handle", 0);
if (!rmu_node) {
@@ -602,6 +700,11 @@ int fsl_rio_setup(struct platform_device *dev)
RIO_ATMU_REGS_PORT2_OFFSET));
priv->maint_atmu_regs = priv->atmu_regs + 1;
+ priv->inb_atmu_regs = (struct rio_inb_atmu_regs __iomem *)
+ (priv->regs_win +
+ ((i == 0) ? RIO_INB_ATMU_REGS_PORT1_OFFSET :
+ RIO_INB_ATMU_REGS_PORT2_OFFSET));
+
/* Set to receive any dist ID for serial RapidIO controller. */
if (port->phy_type == RIO_PHY_SERIAL)
@@ -620,6 +723,7 @@ int fsl_rio_setup(struct platform_device *dev)
rio_law_start = range_start;
fsl_rio_setup_rmu(port, rmu_np[i]);
+ fsl_rio_inbound_mem_init(priv);
dbell->mport[i] = port;
diff --git a/arch/powerpc/sysdev/fsl_rio.h b/arch/powerpc/sysdev/fsl_rio.h
index ae8e274..d53407a 100644
--- a/arch/powerpc/sysdev/fsl_rio.h
+++ b/arch/powerpc/sysdev/fsl_rio.h
@@ -50,9 +50,12 @@
#define RIO_S_DBELL_REGS_OFFSET 0x13400
#define RIO_S_PW_REGS_OFFSET 0x134e0
#define RIO_ATMU_REGS_DBELL_OFFSET 0x10C40
+#define RIO_INB_ATMU_REGS_PORT1_OFFSET 0x10d60
+#define RIO_INB_ATMU_REGS_PORT2_OFFSET 0x10f60
#define MAX_MSG_UNIT_NUM 2
#define MAX_PORT_NUM 4
+#define RIO_INB_ATMU_COUNT 4
struct rio_atmu_regs {
u32 rowtar;
@@ -63,6 +66,15 @@ struct rio_atmu_regs {
u32 pad2[3];
};
+struct rio_inb_atmu_regs {
+ u32 riwtar;
+ u32 pad1;
+ u32 riwbar;
+ u32 pad2;
+ u32 riwar;
+ u32 pad3[3];
+};
+
struct rio_dbell_ring {
void *virt;
dma_addr_t phys;
@@ -99,6 +111,7 @@ struct rio_priv {
void __iomem *regs_win;
struct rio_atmu_regs __iomem *atmu_regs;
struct rio_atmu_regs __iomem *maint_atmu_regs;
+ struct rio_inb_atmu_regs __iomem *inb_atmu_regs;
void __iomem *maint_win;
void *rmm_handle; /* RapidIO message manager(unit) Handle */
};
--
1.7.10.4
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