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authorChris Metcalf <cmetcalf@tilera.com>2013-08-01 11:36:42 -0400
committerDavid S. Miller <davem@davemloft.net>2013-08-01 14:35:51 -0700
commit9ab5ec59c8a9cc0e4b94252b48200b6023c716aa (patch)
treefa9084e9bbb9eaf85689723d1b6e2c957f095a57 /arch/tile
parent84e181ba3607a4e1175d929c346c72f9bfa1ab02 (diff)
downloadop-kernel-dev-9ab5ec59c8a9cc0e4b94252b48200b6023c716aa.zip
op-kernel-dev-9ab5ec59c8a9cc0e4b94252b48200b6023c716aa.tar.gz
tile: support PTP using the tilegx mPIPE (IEEE 1588)
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com> Acked-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/tile')
-rw-r--r--arch/tile/gxio/iorpc_mpipe.c19
-rw-r--r--arch/tile/include/gxio/iorpc_mpipe.h10
-rw-r--r--arch/tile/include/gxio/mpipe.h14
3 files changed, 40 insertions, 3 deletions
diff --git a/arch/tile/gxio/iorpc_mpipe.c b/arch/tile/gxio/iorpc_mpipe.c
index c2fb1516..4f8f3d6 100644
--- a/arch/tile/gxio/iorpc_mpipe.c
+++ b/arch/tile/gxio/iorpc_mpipe.c
@@ -475,6 +475,25 @@ int gxio_mpipe_adjust_timestamp_aux(gxio_mpipe_context_t * context,
EXPORT_SYMBOL(gxio_mpipe_adjust_timestamp_aux);
+struct adjust_timestamp_freq_param {
+ int32_t ppb;
+};
+
+int gxio_mpipe_adjust_timestamp_freq(gxio_mpipe_context_t * context,
+ int32_t ppb)
+{
+ struct adjust_timestamp_freq_param temp;
+ struct adjust_timestamp_freq_param *params = &temp;
+
+ params->ppb = ppb;
+
+ return hv_dev_pwrite(context->fd, 0, (HV_VirtAddr) params,
+ sizeof(*params),
+ GXIO_MPIPE_OP_ADJUST_TIMESTAMP_FREQ);
+}
+
+EXPORT_SYMBOL(gxio_mpipe_adjust_timestamp_freq);
+
struct config_edma_ring_blks_param {
unsigned int ering;
unsigned int max_blks;
diff --git a/arch/tile/include/gxio/iorpc_mpipe.h b/arch/tile/include/gxio/iorpc_mpipe.h
index eef60fd..fdd07f8 100644
--- a/arch/tile/include/gxio/iorpc_mpipe.h
+++ b/arch/tile/include/gxio/iorpc_mpipe.h
@@ -46,10 +46,11 @@
#define GXIO_MPIPE_OP_LINK_CLOSE_AUX IORPC_OPCODE(IORPC_FORMAT_NONE, 0x1212)
#define GXIO_MPIPE_OP_LINK_SET_ATTR_AUX IORPC_OPCODE(IORPC_FORMAT_NONE, 0x1213)
-#define GXIO_MPIPE_OP_GET_TIMESTAMP_AUX IORPC_OPCODE(IORPC_FORMAT_NONE_NOUSER, 0x121e)
-#define GXIO_MPIPE_OP_SET_TIMESTAMP_AUX IORPC_OPCODE(IORPC_FORMAT_NONE_NOUSER, 0x121f)
-#define GXIO_MPIPE_OP_ADJUST_TIMESTAMP_AUX IORPC_OPCODE(IORPC_FORMAT_NONE_NOUSER, 0x1220)
+#define GXIO_MPIPE_OP_GET_TIMESTAMP_AUX IORPC_OPCODE(IORPC_FORMAT_NONE, 0x121e)
+#define GXIO_MPIPE_OP_SET_TIMESTAMP_AUX IORPC_OPCODE(IORPC_FORMAT_NONE, 0x121f)
+#define GXIO_MPIPE_OP_ADJUST_TIMESTAMP_AUX IORPC_OPCODE(IORPC_FORMAT_NONE, 0x1220)
#define GXIO_MPIPE_OP_CONFIG_EDMA_RING_BLKS IORPC_OPCODE(IORPC_FORMAT_NONE, 0x1221)
+#define GXIO_MPIPE_OP_ADJUST_TIMESTAMP_FREQ IORPC_OPCODE(IORPC_FORMAT_NONE, 0x1222)
#define GXIO_MPIPE_OP_ARM_POLLFD IORPC_OPCODE(IORPC_FORMAT_KERNEL_POLLFD, 0x9000)
#define GXIO_MPIPE_OP_CLOSE_POLLFD IORPC_OPCODE(IORPC_FORMAT_KERNEL_POLLFD, 0x9001)
#define GXIO_MPIPE_OP_GET_MMIO_BASE IORPC_OPCODE(IORPC_FORMAT_NONE_NOUSER, 0x8000)
@@ -128,6 +129,9 @@ int gxio_mpipe_set_timestamp_aux(gxio_mpipe_context_t * context, uint64_t sec,
int gxio_mpipe_adjust_timestamp_aux(gxio_mpipe_context_t * context,
int64_t nsec);
+int gxio_mpipe_adjust_timestamp_freq(gxio_mpipe_context_t * context,
+ int32_t ppb);
+
int gxio_mpipe_arm_pollfd(gxio_mpipe_context_t * context, int pollfd_cookie);
int gxio_mpipe_close_pollfd(gxio_mpipe_context_t * context, int pollfd_cookie);
diff --git a/arch/tile/include/gxio/mpipe.h b/arch/tile/include/gxio/mpipe.h
index eb7fee4..e37cf4f 100644
--- a/arch/tile/include/gxio/mpipe.h
+++ b/arch/tile/include/gxio/mpipe.h
@@ -1854,4 +1854,18 @@ extern int gxio_mpipe_set_timestamp(gxio_mpipe_context_t *context,
extern int gxio_mpipe_adjust_timestamp(gxio_mpipe_context_t *context,
int64_t delta);
+/** Adjust the mPIPE timestamp clock frequency.
+ *
+ * @param context An initialized mPIPE context.
+ * @param ppb A 32-bit signed PPB (Parts Per Billion) value to adjust.
+ * The absolute value of ppb must be less than or equal to 1000000000.
+ * Values less than about 30000 will generally cause a GXIO_ERR_INVAL
+ * return due to the granularity of the hardware that converts reference
+ * clock cycles into seconds and nanoseconds.
+ * @return If the call was successful, zero; otherwise, a negative error
+ * code.
+ */
+extern int gxio_mpipe_adjust_timestamp_freq(gxio_mpipe_context_t* context,
+ int32_t ppb);
+
#endif /* !_GXIO_MPIPE_H_ */
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