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powerpc/fsl-rio: add support for mapping inbound windows 

Add support for mapping and unmapping of inbound rapidio windows.  This
allows for drivers to open up a part of local memory on the rapidio
network.  Also applications can use this and tranfer blocks of data
over the network.

Signed-off-by: Martijn de Gouw <martijn.de.gouw@prodrive-technologies.com>
[scottwood@freescale.com: updated commit message based on review]
Signed-off-by: Scott Wood <scottwood@freescale.com>
This commit is contained in:
Martijn de Gouw 2014-08-05 15:52:32 +02:00 committed by Scott Wood
parent e327fff47b
commit e6a546fd03
2 changed files with 117 additions and 0 deletions
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104
arch/powerpc/sysdev/fsl_rio.c
View File

@ -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;

13
arch/powerpc/sysdev/fsl_rio.h
View File

@ -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 */
};