@@ -164,6 +164,24 @@ Runtime Config Options
-a 0002:0e:00.0,tim_ring_ctl=[2-1023-1-0]
+- ``TIM external clock frequency``
+
+ The ``tim_eclk_freq`` devagrs can be used to pass external clock frequencies
+ when external clock source is selected.
+
+ External clock frequencies are mapped as follows::
+
+ RTE_EVENT_TIMER_ADAPTER_EXT_CLK0 = TIM_CLK_SRC_10NS,
+ RTE_EVENT_TIMER_ADAPTER_EXT_CLK1 = TIM_CLK_SRC_GPIO,
+ RTE_EVENT_TIMER_ADAPTER_EXT_CLK2 = TIM_CLK_SRC_PTP,
+ RTE_EVENT_TIMER_ADAPTER_EXT_CLK3 = TIM_CLK_SRC_SYNCE
+
+ The order of frequencies supplied to device args should be GPIO-PTP-SYNCE.
+
+ For Example::
+
+ -a 0002:0e:00.0,tim_eclk_freq=122880000-1000000000-0
+
Debugging Options
-----------------
@@ -43,6 +43,7 @@
#define PLT_MAX RTE_MAX
#define PLT_DIM RTE_DIM
#define PLT_SET_USED RTE_SET_USED
+#define PLT_SWAP RTE_SWAP
#define PLT_STATIC_ASSERT(s) _Static_assert(s, #s)
#define PLT_ALIGN RTE_ALIGN
#define PLT_ALIGN_MUL_CEIL RTE_ALIGN_MUL_CEIL
@@ -976,4 +976,5 @@ RTE_PMD_REGISTER_PARAM_STRING(event_cn10k, CNXK_SSO_XAE_CNT "=<int>"
CNXK_TIM_DISABLE_NPA "=1"
CNXK_TIM_CHNK_SLOTS "=<int>"
CNXK_TIM_RINGS_LMT "=<int>"
- CNXK_TIM_STATS_ENA "=1");
+ CNXK_TIM_STATS_ENA "=1"
+ CNXK_TIM_EXT_CLK "=<string>");
@@ -117,6 +117,80 @@ cnxk_tim_ring_info_get(const struct rte_event_timer_adapter *adptr,
sizeof(struct rte_event_timer_adapter_conf));
}
+static inline void
+sort_multi_array(double ref_arr[], uint64_t arr1[], uint64_t arr2[],
+ uint64_t arr3[], uint8_t sz)
+{
+ int x;
+
+ for (x = 0; x < sz - 1; x++) {
+ if (ref_arr[x] > ref_arr[x + 1]) {
+ PLT_SWAP(ref_arr[x], ref_arr[x + 1]);
+ PLT_SWAP(arr1[x], arr1[x + 1]);
+ PLT_SWAP(arr2[x], arr2[x + 1]);
+ PLT_SWAP(arr3[x], arr3[x + 1]);
+ x = -1;
+ }
+ }
+}
+
+static inline void
+populate_sample(uint64_t tck[], uint64_t ns[], double diff[], uint64_t dst[],
+ uint64_t req_tck, uint64_t clk_freq, double tck_ns, uint8_t sz,
+ bool mov_fwd)
+{
+ int i;
+
+ for (i = 0; i < sz; i++) {
+ tck[i] = i ? tck[i - 1] : req_tck;
+ do {
+ mov_fwd ? tck[i]++ : tck[i]--;
+ ns[i] = round((double)tck[i] * tck_ns);
+ if (round((double)tck[i] * tck_ns) >
+ ((double)tck[i] * tck_ns))
+ continue;
+ } while (ns[i] % (uint64_t)cnxk_tim_ns_per_tck(clk_freq));
+ diff[i] = PLT_MAX((double)ns[i], (double)tck[i] * tck_ns) -
+ PLT_MIN((double)ns[i], (double)tck[i] * tck_ns);
+ dst[i] = mov_fwd ? tck[i] - req_tck : req_tck - tck[i];
+ }
+}
+
+static void
+tim_adjust_resolution(uint64_t *req_ns, uint64_t *req_tck, double tck_ns,
+ uint64_t clk_freq, uint64_t max_tmo, uint64_t m_tck)
+{
+#define MAX_SAMPLES 5
+ double rmax_diff[MAX_SAMPLES], rmin_diff[MAX_SAMPLES];
+ uint64_t min_tck[MAX_SAMPLES], max_tck[MAX_SAMPLES];
+ uint64_t min_dst[MAX_SAMPLES], max_dst[MAX_SAMPLES];
+ uint64_t min_ns[MAX_SAMPLES], max_ns[MAX_SAMPLES];
+ int i;
+
+ populate_sample(max_tck, max_ns, rmax_diff, max_dst, *req_tck, clk_freq,
+ tck_ns, MAX_SAMPLES, true);
+ sort_multi_array(rmax_diff, max_dst, max_tck, max_ns, MAX_SAMPLES);
+
+ populate_sample(min_tck, min_ns, rmin_diff, min_dst, *req_tck, clk_freq,
+ tck_ns, MAX_SAMPLES, false);
+ sort_multi_array(rmin_diff, min_dst, min_tck, min_ns, MAX_SAMPLES);
+
+ for (i = 0; i < MAX_SAMPLES; i++) {
+ if (min_dst[i] < max_dst[i] && min_tck[i] > m_tck &&
+ (max_tmo / min_ns[i]) <=
+ (TIM_MAX_BUCKET_SIZE - TIM_MIN_BUCKET_SIZE)) {
+ *req_tck = min_tck[i];
+ *req_ns = min_ns[i];
+ break;
+ } else if ((max_tmo / max_ns[i]) <
+ (TIM_MAX_BUCKET_SIZE - TIM_MIN_BUCKET_SIZE)) {
+ *req_tck = max_tck[i];
+ *req_ns = max_ns[i];
+ break;
+ }
+ }
+}
+
static int
cnxk_tim_ring_create(struct rte_event_timer_adapter *adptr)
{
@@ -178,10 +252,25 @@ cnxk_tim_ring_create(struct rte_event_timer_adapter *adptr)
goto tim_hw_free;
}
- /* Round */
tim_ring->tck_nsec =
round(RTE_ALIGN_MUL_NEAR((long double)rcfg->timer_tick_ns,
cnxk_tim_ns_per_tck(clk_freq)));
+ if (log10(clk_freq) - floor(log10(clk_freq)) != 0.0) {
+ uint64_t req_ns, req_tck;
+ double tck_ns;
+
+ req_ns = tim_ring->tck_nsec;
+ tck_ns = NSECPERSEC / clk_freq;
+ req_tck = round(rcfg->timer_tick_ns / tck_ns);
+ tim_adjust_resolution(&req_ns, &req_tck, tck_ns, clk_freq,
+ rcfg->max_tmo_ns, min_intvl_cyc);
+ if ((tim_ring->tck_nsec != req_ns) &&
+ !(rcfg->flags & RTE_EVENT_TIMER_ADAPTER_F_ADJUST_RES)) {
+ rc = -ERANGE;
+ goto tim_hw_free;
+ }
+ tim_ring->tck_nsec = ceil(req_tck * tck_ns);
+ }
tim_ring->tck_int = round((long double)tim_ring->tck_nsec /
cnxk_tim_ns_per_tck(clk_freq));
@@ -489,6 +578,43 @@ cnxk_tim_parse_kvargs_dict(const char *key, const char *value, void *opaque)
return 0;
}
+static void
+cnxk_tim_parse_clk_list(const char *value, void *opaque)
+{
+ enum roc_tim_clk_src src[] = {ROC_TIM_CLK_SRC_GPIO, ROC_TIM_CLK_SRC_PTP,
+ ROC_TIM_CLK_SRC_SYNCE,
+ ROC_TIM_CLK_SRC_INVALID};
+ struct cnxk_tim_evdev *dev = opaque;
+ char *str = strdup(value);
+ char *tok;
+ int i = 0;
+
+ if (!strlen(str))
+ return;
+
+ tok = strtok(str, "-");
+ while (tok != NULL && src[i] != ROC_TIM_CLK_SRC_INVALID) {
+ dev->ext_clk_freq[src[i]] = strtoull(tok, NULL, 10);
+ tok = strtok(NULL, "-");
+ i++;
+ }
+
+ free(str);
+}
+
+static int
+cnxk_tim_parse_kvargs_dsv(const char *key, const char *value, void *opaque)
+{
+ RTE_SET_USED(key);
+
+ /* DSV format GPIO-PTP-SYNCE-BTS use '-' as ','
+ * isn't allowed. 0 represents default.
+ */
+ cnxk_tim_parse_clk_list(value, opaque);
+
+ return 0;
+}
+
static void
cnxk_tim_parse_devargs(struct rte_devargs *devargs, struct cnxk_tim_evdev *dev)
{
@@ -511,6 +637,8 @@ cnxk_tim_parse_devargs(struct rte_devargs *devargs, struct cnxk_tim_evdev *dev)
&dev->min_ring_cnt);
rte_kvargs_process(kvlist, CNXK_TIM_RING_CTL,
&cnxk_tim_parse_kvargs_dict, &dev);
+ rte_kvargs_process(kvlist, CNXK_TIM_EXT_CLK, &cnxk_tim_parse_kvargs_dsv,
+ dev);
rte_kvargs_free(kvlist);
}
@@ -39,6 +39,7 @@
#define CNXK_TIM_STATS_ENA "tim_stats_ena"
#define CNXK_TIM_RINGS_LMT "tim_rings_lmt"
#define CNXK_TIM_RING_CTL "tim_ring_ctl"
+#define CNXK_TIM_EXT_CLK "tim_eclk_freq"
#define CNXK_TIM_SP 0x1
#define CNXK_TIM_MP 0x2
@@ -94,6 +95,7 @@ struct cnxk_tim_evdev {
uint16_t min_ring_cnt;
uint8_t enable_stats;
uint16_t ring_ctl_cnt;
+ uint64_t ext_clk_freq[ROC_TIM_CLK_SRC_INVALID];
struct cnxk_tim_ctl *ring_ctl_data;
};
@@ -237,6 +239,8 @@ cnxk_tim_get_clk_freq(struct cnxk_tim_evdev *dev, enum roc_tim_clk_src clk_src,
case ROC_TIM_CLK_SRC_GPIO:
case ROC_TIM_CLK_SRC_PTP:
case ROC_TIM_CLK_SRC_SYNCE:
+ *freq = dev->ext_clk_freq[clk_src];
+ break;
default:
return -EINVAL;
}