[v4,4/7] common/idpf: enhance timestamp offload feature for ACC
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Commit Message
For ACC, getting main time from MTS registers by shared memory.
Notice: it is a workaround, and it will be removed after generic
solution are provided.
Fixes: 8c6098afa075 ("common/idpf: add Rx/Tx data path")
Cc: stable@dpdk.org
Signed-off-by: Wenjing Qiao <wenjing.qiao@intel.com>
---
drivers/common/idpf/base/idpf_osdep.h | 48 ++++++++++++++++++++++++++
drivers/common/idpf/idpf_common_rxtx.c | 30 +++++++++++++---
drivers/common/idpf/meson.build | 2 ++
3 files changed, 76 insertions(+), 4 deletions(-)
@@ -25,6 +25,13 @@
#include <rte_io.h>
#include <rte_compat.h>
+#ifdef IDPF_ACC_TIMESTAMP
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#endif /* IDPF_ACC_TIMESTAMP */
+
#define INLINE inline
#define STATIC static
@@ -346,4 +353,45 @@ idpf_hweight32(u32 num)
#endif
+#ifdef IDPF_ACC_TIMESTAMP
+#define IDPF_ACC_TIMESYNC_BASE_ADDR 0x480D500000
+#define IDPF_ACC_GLTSYN_TIME_H (IDPF_ACC_TIMESYNC_BASE_ADDR + 0x1C)
+#define IDPF_ACC_GLTSYN_TIME_L (IDPF_ACC_TIMESYNC_BASE_ADDR + 0x10)
+
+inline uint32_t
+idpf_mmap_r32(uint64_t pa)
+{
+ int fd;
+ void *bp, *vp;
+ uint32_t rval = 0xdeadbeef;
+ uint32_t ps, ml, of;
+
+ fd = open("/dev/mem", (O_RDWR | O_SYNC));
+ if (fd == -1) {
+ perror("/dev/mem");
+ return -1;
+ }
+ ml = ps = getpagesize();
+ of = (uint32_t)pa & (ps - 1);
+ if (of + (sizeof(uint32_t) * 4) > ps)
+ ml *= 2;
+ bp = mmap(NULL, ml, (PROT_READ | PROT_WRITE), MAP_SHARED, fd, pa & ~(uint64_t)(ps - 1));
+ if (bp == MAP_FAILED) {
+ perror("mmap");
+ goto done;
+ }
+
+ vp = (char *)bp + of;
+
+ rval = *(volatile uint32_t *)vp;
+ if (munmap(bp, ml) == -1)
+ perror("munmap");
+done:
+ close(fd);
+
+ return rval;
+}
+
+#endif /* IDPF_ACC_TIMESTAMP */
+
#endif /* _IDPF_OSDEP_H_ */
@@ -354,12 +354,36 @@ idpf_qc_tx_queue_release(void *txq)
static void
idpf_dev_read_time_hw(void *cb_arg)
{
-#ifdef RTE_ARCH_X86_64
struct idpf_adapter *ad = (struct idpf_adapter *)cb_arg;
uint32_t hi, lo, lo2;
int rc = 0;
+#ifndef IDPF_ACC_TIMESTAMP
struct idpf_hw *hw = &ad->hw;
+#endif /* !IDPF_ACC_TIMESTAMP */
+#ifdef IDPF_ACC_TIMESTAMP
+
+ lo = idpf_mmap_r32(IDPF_ACC_GLTSYN_TIME_L);
+ hi = idpf_mmap_r32(IDPF_ACC_GLTSYN_TIME_H);
+ DRV_LOG(DEBUG, "lo : %X,", lo);
+ DRV_LOG(DEBUG, "hi : %X,", hi);
+ /*
+ * On typical system, the delta between lo and lo2 is ~1000ns,
+ * so 10000 seems a large-enough but not overly-big guard band.
+ */
+ if (lo > (UINT32_MAX - IDPF_TIMESYNC_REG_WRAP_GUARD_BAND))
+ lo2 = idpf_mmap_r32(IDPF_ACC_GLTSYN_TIME_L);
+ else
+ lo2 = lo;
+
+ if (lo2 < lo) {
+ lo = idpf_mmap_r32(IDPF_ACC_GLTSYN_TIME_L);
+ hi = idpf_mmap_r32(IDPF_ACC_GLTSYN_TIME_H);
+ }
+
+ ad->time_hw = ((uint64_t)hi << 32) | lo;
+
+#else /* !IDPF_ACC_TIMESTAMP */
IDPF_WRITE_REG(hw, GLTSYN_CMD_SYNC_0_0, PF_GLTSYN_CMD_SYNC_SHTIME_EN_M);
IDPF_WRITE_REG(hw, GLTSYN_CMD_SYNC_0_0,
PF_GLTSYN_CMD_SYNC_EXEC_CMD_M | PF_GLTSYN_CMD_SYNC_SHTIME_EN_M);
@@ -380,9 +404,7 @@ idpf_dev_read_time_hw(void *cb_arg)
}
ad->time_hw = ((uint64_t)hi << 32) | lo;
-#else /* !RTE_ARCH_X86_64 */
- ad->time_hw = 0;
-#endif /* RTE_ARCH_X86_64 */
+#endif /* IDPF_ACC_TIMESTAMP */
/* re-alarm watchdog */
rc = rte_eal_alarm_set(1000 * 1000, &idpf_dev_read_time_hw, cb_arg);
@@ -45,3 +45,5 @@ if arch_subdir == 'x86'
endif
subdir('base')
+
+ dpdk_conf.set('IDPF_ACC_TIMESTAMP', false)