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authorDamjan Marion <damarion@cisco.com>2020-05-22 17:53:49 +0200
committerDamjan Marion <damarion@cisco.com>2020-05-22 17:53:49 +0200
commitd4d2e59d0d4409a8695b66c4102fb734e8744115 (patch)
treee35a3893312e3e24e2c31e6f49fe5d1e3887ff96
parent5a47b43a392ffc71d2e4e0954fd28fd9a3cd5f5e (diff)
avf: interrupt mode, support for WB_ON_ITR
Type: improvement Change-Id: I5c944c3f82e0f278b64f28e09a74f24514c029f0 Signed-off-by: Damjan Marion <damarion@cisco.com>
-rw-r--r--src/plugins/avf/avf.h4
-rw-r--r--src/plugins/avf/device.c156
2 files changed, 103 insertions, 57 deletions
diff --git a/src/plugins/avf/avf.h b/src/plugins/avf/avf.h
index 14442b10ec8..5d517826009 100644
--- a/src/plugins/avf/avf.h
+++ b/src/plugins/avf/avf.h
@@ -70,7 +70,8 @@
_(4, LINK_UP, "link-up") \
_(5, SHARED_TXQ_LOCK, "shared-txq-lock") \
_(6, ELOG, "elog") \
- _(7, PROMISC, "promisc")
+ _(7, PROMISC, "promisc") \
+ _(8, RX_INT, "rx-interrupts")
enum
{
@@ -179,6 +180,7 @@ typedef struct
u8 hwaddr[6];
u16 num_queue_pairs;
u16 max_vectors;
+ u16 n_rx_irqs;
u16 max_mtu;
u32 rss_key_size;
u32 rss_lut_size;
diff --git a/src/plugins/avf/device.c b/src/plugins/avf/device.c
index d5de8567fab..8d44bd0422a 100644
--- a/src/plugins/avf/device.c
+++ b/src/plugins/avf/device.c
@@ -27,7 +27,7 @@
#define AVF_MBOX_BUF_SZ 512
#define AVF_RXQ_SZ 512
#define AVF_TXQ_SZ 512
-#define AVF_ITR_INT 32
+#define AVF_ITR_INT 250
#define PCI_VENDOR_ID_INTEL 0x8086
#define PCI_DEVICE_ID_INTEL_AVF 0x1889
@@ -49,8 +49,15 @@ const static char *virtchnl_event_names[] = {
#undef _
};
+typedef enum
+{
+ AVF_IRQ_STATE_DISABLED,
+ AVF_IRQ_STATE_ENABLED,
+ AVF_IRQ_STATE_WB_ON_ITR,
+} avf_irq_state_t;
+
static inline void
-avf_irq_0_disable (avf_device_t * ad)
+avf_irq_0_set_state (avf_device_t * ad, avf_irq_state_t state)
{
u32 dyn_ctl0 = 0, icr0_ena = 0;
@@ -59,45 +66,52 @@ avf_irq_0_disable (avf_device_t * ad)
avf_reg_write (ad, AVFINT_ICR0_ENA1, icr0_ena);
avf_reg_write (ad, AVFINT_DYN_CTL0, dyn_ctl0);
avf_reg_flush (ad);
-}
-static inline void
-avf_irq_0_enable (avf_device_t * ad)
-{
- u32 dyn_ctl0 = 0, icr0_ena = 0;
+ if (state == AVF_IRQ_STATE_DISABLED)
+ return;
+
+ dyn_ctl0 = 0;
+ icr0_ena = 0;
icr0_ena |= (1 << 30); /* [30] Admin Queue Enable */
dyn_ctl0 |= (1 << 0); /* [0] Interrupt Enable */
dyn_ctl0 |= (1 << 1); /* [1] Clear PBA */
- //dyn_ctl0 |= (3 << 3); /* [4:3] ITR Index, 11b = No ITR update */
+ dyn_ctl0 |= (2 << 3); /* [4:3] ITR Index, 11b = No ITR update */
dyn_ctl0 |= ((AVF_ITR_INT / 2) << 5); /* [16:5] ITR Interval in 2us steps */
- avf_irq_0_disable (ad);
avf_reg_write (ad, AVFINT_ICR0_ENA1, icr0_ena);
avf_reg_write (ad, AVFINT_DYN_CTL0, dyn_ctl0);
avf_reg_flush (ad);
}
static inline void
-avf_irq_n_disable (avf_device_t * ad, u8 line)
+avf_irq_n_set_state (avf_device_t * ad, u8 line, avf_irq_state_t state)
{
u32 dyn_ctln = 0;
+ /* disable */
avf_reg_write (ad, AVFINT_DYN_CTLN (line), dyn_ctln);
avf_reg_flush (ad);
-}
-static inline void
-avf_irq_n_enable (avf_device_t * ad, u8 line)
-{
- u32 dyn_ctln = 0;
+ if (state == AVF_IRQ_STATE_DISABLED)
+ return;
- dyn_ctln |= (1 << 0); /* [0] Interrupt Enable */
dyn_ctln |= (1 << 1); /* [1] Clear PBA */
- dyn_ctln |= ((AVF_ITR_INT / 2) << 5); /* [16:5] ITR Interval in 2us steps */
+ if (state == AVF_IRQ_STATE_WB_ON_ITR)
+ {
+ /* minimal ITR interval, use ITR1 */
+ dyn_ctln |= (1 << 3); /* [4:3] ITR Index */
+ dyn_ctln |= ((32 / 2) << 5); /* [16:5] ITR Interval in 2us steps */
+ dyn_ctln |= (1 << 30); /* [30] Writeback on ITR */
+ }
+ else
+ {
+ /* configured ITR interval, use ITR0 */
+ dyn_ctln |= (1 << 0); /* [0] Interrupt Enable */
+ dyn_ctln |= ((AVF_ITR_INT / 2) << 5); /* [16:5] ITR Interval in 2us steps */
+ }
- avf_irq_n_disable (ad, line);
avf_reg_write (ad, AVFINT_DYN_CTLN (line), dyn_ctln);
avf_reg_flush (ad);
}
@@ -686,24 +700,29 @@ avf_op_config_vsi_queues (vlib_main_t * vm, avf_device_t * ad)
clib_error_t *
avf_op_config_irq_map (vlib_main_t * vm, avf_device_t * ad)
{
- int count = 1;
int msg_len = sizeof (virtchnl_irq_map_info_t) +
- count * sizeof (virtchnl_vector_map_t);
+ (ad->n_rx_irqs) * sizeof (virtchnl_vector_map_t);
u8 msg[msg_len];
virtchnl_irq_map_info_t *imi;
clib_memset (msg, 0, msg_len);
imi = (virtchnl_irq_map_info_t *) msg;
- imi->num_vectors = count;
+ imi->num_vectors = ad->n_rx_irqs;
+
+ for (int i = 0; i < ad->n_rx_irqs; i++)
+ {
+ imi->vecmap[i].vector_id = i + 1;
+ imi->vecmap[i].vsi_id = ad->vsi_id;
+ if (ad->n_rx_irqs == ad->n_rx_queues)
+ imi->vecmap[i].rxq_map = 1 << i;
+ else
+ imi->vecmap[i].rxq_map = pow2_mask (ad->n_rx_queues);;
- imi->vecmap[0].vector_id = 1;
- imi->vecmap[0].vsi_id = ad->vsi_id;
- imi->vecmap[0].rxq_map = (1 << ad->n_rx_queues) - 1;
- imi->vecmap[0].txq_map = (1 << ad->n_tx_queues) - 1;
+ avf_log_debug (ad, "config_irq_map[%u/%u]: vsi_id %u vector_id %u "
+ "rxq_map %u", i, ad->n_rx_irqs - 1, ad->vsi_id,
+ imi->vecmap[i].vector_id, imi->vecmap[i].rxq_map);
+ }
- avf_log_debug (ad, "config_irq_map: vsi_id %u vector_id %u rxq_map %u",
- ad->vsi_id, imi->vecmap[0].vector_id,
- imi->vecmap[0].rxq_map);
return avf_send_to_pf (vm, ad, VIRTCHNL_OP_CONFIG_IRQ_MAP, msg, msg_len, 0,
0);
@@ -872,7 +891,7 @@ avf_device_init (vlib_main_t * vm, avf_main_t * am, avf_device_t * ad,
virtchnl_vf_resource_t res = { 0 };
clib_error_t *error;
vlib_thread_main_t *tm = vlib_get_thread_main ();
- int i;
+ int i, wb_on_itr;
avf_adminq_init (vm, ad);
@@ -915,6 +934,7 @@ avf_device_init (vlib_main_t * vm, avf_main_t * am, avf_device_t * ad,
ad->max_mtu = res.max_mtu;
ad->rss_key_size = res.rss_key_size;
ad->rss_lut_size = res.rss_lut_size;
+ wb_on_itr = (ad->feature_bitmap & VIRTCHNL_VF_OFFLOAD_WB_ON_ITR) != 0;
clib_memcpy_fast (ad->hwaddr, res.vsi_res[0].default_mac_addr, 6);
@@ -946,6 +966,15 @@ avf_device_init (vlib_main_t * vm, avf_main_t * am, avf_device_t * ad,
if ((error = avf_txq_init (vm, ad, i, args->txq_size)))
return error;
+ if (ad->max_vectors > ad->n_rx_queues)
+ {
+ ad->flags |= AVF_DEVICE_F_RX_INT;
+ ad->n_rx_irqs = args->rxq_num;
+ }
+ else
+ ad->n_rx_irqs = 1;
+
+
if ((ad->feature_bitmap & VIRTCHNL_VF_OFFLOAD_RSS_PF) &&
(error = avf_op_config_rss_lut (vm, ad)))
return error;
@@ -960,9 +989,11 @@ avf_device_init (vlib_main_t * vm, avf_main_t * am, avf_device_t * ad,
if ((error = avf_op_config_irq_map (vm, ad)))
return error;
- avf_irq_0_enable (ad);
- for (i = 0; i < ad->n_rx_queues; i++)
- avf_irq_n_enable (ad, i);
+ avf_irq_0_set_state (ad, AVF_IRQ_STATE_ENABLED);
+
+ for (i = 0; i < ad->n_rx_irqs; i++)
+ avf_irq_n_set_state (ad, i, wb_on_itr ? AVF_IRQ_STATE_WB_ON_ITR :
+ AVF_IRQ_STATE_ENABLED);
if ((error = avf_op_add_eth_addr (vm, ad, 1, ad->hwaddr)))
return error;
@@ -1237,7 +1268,7 @@ avf_irq_0_handler (vlib_main_t * vm, vlib_pci_dev_handle_t h, u16 line)
ed->icr0 = icr0;
}
- avf_irq_0_enable (ad);
+ avf_irq_0_set_state (ad, AVF_IRQ_STATE_ENABLED);
/* bit 30 - Send/Receive Admin queue interrupt indication */
if (icr0 & (1 << 30))
@@ -1252,8 +1283,6 @@ avf_irq_n_handler (vlib_main_t * vm, vlib_pci_dev_handle_t h, u16 line)
avf_main_t *am = &avf_main;
uword pd = vlib_pci_get_private_data (vm, h);
avf_device_t *ad = pool_elt_at_index (am->devices, pd);
- u16 qid;
- int i;
if (ad->flags & AVF_DEVICE_F_ELOG)
{
@@ -1275,11 +1304,11 @@ avf_irq_n_handler (vlib_main_t * vm, vlib_pci_dev_handle_t h, u16 line)
ed->line = line;
}
- qid = line - 1;
- if (vec_len (ad->rxqs) > qid && ad->rxqs[qid].int_mode != 0)
- vnet_device_input_set_interrupt_pending (vnm, ad->hw_if_index, qid);
- for (i = 0; i < vec_len (ad->rxqs); i++)
- avf_irq_n_enable (ad, i);
+ line--;
+
+ if (ad->flags & AVF_DEVICE_F_RX_INT && ad->rxqs[line].int_mode)
+ vnet_device_input_set_interrupt_pending (vnm, ad->hw_if_index, line);
+ avf_irq_n_set_state (ad, line, AVF_IRQ_STATE_ENABLED);
}
void
@@ -1392,17 +1421,6 @@ avf_create_if (vlib_main_t * vm, avf_create_if_args_t * args)
if ((error = vlib_pci_map_region (vm, h, 0, &ad->bar0)))
goto error;
- if ((error = vlib_pci_register_msix_handler (vm, h, 0, 1,
- &avf_irq_0_handler)))
- goto error;
-
- if ((error = vlib_pci_register_msix_handler (vm, h, 1, 1,
- &avf_irq_n_handler)))
- goto error;
-
- if ((error = vlib_pci_enable_msix_irq (vm, h, 0, 2)))
- goto error;
-
ad->atq = vlib_physmem_alloc_aligned_on_numa (vm, sizeof (avf_aq_desc_t) *
AVF_MBOX_LEN,
CLIB_CACHE_LINE_BYTES,
@@ -1455,15 +1473,26 @@ avf_create_if (vlib_main_t * vm, avf_create_if_args_t * args)
if ((error = vlib_pci_map_dma (vm, h, ad->arq_bufs)))
goto error;
- if ((error = vlib_pci_intr_enable (vm, h)))
- goto error;
-
if (vlib_pci_supports_virtual_addr_dma (vm, h))
ad->flags |= AVF_DEVICE_F_VA_DMA;
if ((error = avf_device_init (vm, am, ad, args)))
goto error;
+ if ((error = vlib_pci_register_msix_handler (vm, h, 0, 1,
+ &avf_irq_0_handler)))
+ goto error;
+
+ if ((error = vlib_pci_register_msix_handler (vm, h, 1, ad->n_rx_irqs,
+ &avf_irq_n_handler)))
+ goto error;
+
+ if ((error = vlib_pci_enable_msix_irq (vm, h, 0, ad->n_rx_irqs + 1)))
+ goto error;
+
+ if ((error = vlib_pci_intr_enable (vm, h)))
+ goto error;
+
/* create interface */
error = ethernet_register_interface (vnm, avf_device_class.index,
ad->dev_instance, ad->hwaddr,
@@ -1532,9 +1561,24 @@ avf_interface_rx_mode_change (vnet_main_t * vnm, u32 hw_if_index, u32 qid,
avf_rxq_t *rxq = vec_elt_at_index (ad->rxqs, qid);
if (mode == VNET_HW_INTERFACE_RX_MODE_POLLING)
- rxq->int_mode = 0;
+ {
+ if (rxq->int_mode == 0)
+ return 0;
+ if (ad->feature_bitmap & VIRTCHNL_VF_OFFLOAD_WB_ON_ITR)
+ avf_irq_n_set_state (ad, qid, AVF_IRQ_STATE_WB_ON_ITR);
+ else
+ avf_irq_n_set_state (ad, qid, AVF_IRQ_STATE_ENABLED);
+ rxq->int_mode = 0;
+ }
else
- rxq->int_mode = 1;
+ {
+ if (rxq->int_mode == 1)
+ return 0;
+ if (ad->n_rx_irqs != ad->n_rx_queues)
+ return clib_error_return (0, "not enough interrupt lines");
+ rxq->int_mode = 1;
+ avf_irq_n_set_state (ad, qid, AVF_IRQ_STATE_ENABLED);
+ }
return 0;
}