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Managed function was extended with packed ring configuration and initialization support. Signed-off-by: Danylo Vodopianov --- drivers/net/ntnic/dbsconfig/ntnic_dbsconfig.c | 191 +++++++++++++++++- drivers/net/ntnic/include/ntnic_virt_queue.h | 27 +++ 2 files changed, 208 insertions(+), 10 deletions(-) diff --git a/drivers/net/ntnic/dbsconfig/ntnic_dbsconfig.c b/drivers/net/ntnic/dbsconfig/ntnic_dbsconfig.c index 5232a95eaa..46b4c4415c 100644 --- a/drivers/net/ntnic/dbsconfig/ntnic_dbsconfig.c +++ b/drivers/net/ntnic/dbsconfig/ntnic_dbsconfig.c @@ -69,16 +69,33 @@ enum nthw_virt_queue_usage { struct nthw_virt_queue { /* Pointers to virt-queue structs */ - struct { - /* SPLIT virtqueue */ - struct virtq_avail *p_avail; - struct virtq_used *p_used; - struct virtq_desc *p_desc; - /* Control variables for virt-queue structs */ - uint16_t am_idx; - uint16_t used_idx; - uint16_t cached_idx; - uint16_t tx_descr_avail_idx; + union { + struct { + /* SPLIT virtqueue */ + struct virtq_avail *p_avail; + struct virtq_used *p_used; + struct virtq_desc *p_desc; + /* Control variables for virt-queue structs */ + uint16_t am_idx; + uint16_t used_idx; + uint16_t cached_idx; + uint16_t tx_descr_avail_idx; + }; + struct { + /* PACKED virtqueue */ + struct pvirtq_event_suppress *driver_event; + struct pvirtq_event_suppress *device_event; + struct pvirtq_desc *desc; + /* + * when in-order release used Tx packets from FPGA it may collapse + * into a batch. When getting new Tx buffers we may only need + * partial + */ + uint16_t next_avail; + uint16_t next_used; + uint16_t avail_wrap_count; + uint16_t used_wrap_count; + }; }; /* Array with packet buffers */ @@ -108,6 +125,11 @@ struct nthw_virt_queue { void *desc_struct_phys_addr; }; +struct pvirtq_struct_layout_s { + size_t driver_event_offset; + size_t device_event_offset; +}; + static struct nthw_virt_queue rxvq[MAX_VIRT_QUEUES]; static struct nthw_virt_queue txvq[MAX_VIRT_QUEUES]; @@ -606,6 +628,143 @@ nthw_setup_mngd_tx_virt_queue_split(nthw_dbs_t *p_nthw_dbs, return &txvq[index]; } +/* + * Packed Ring + */ +static int nthw_setup_managed_virt_queue_packed(struct nthw_virt_queue *vq, + struct pvirtq_struct_layout_s *pvirtq_layout, + struct nthw_memory_descriptor *p_virt_struct_area, + struct nthw_memory_descriptor *p_packet_buffers, + uint16_t flags, + int rx) +{ + /* page aligned */ + assert(((uintptr_t)p_virt_struct_area->phys_addr & 0xfff) == 0); + assert(p_packet_buffers); + + /* clean canvas */ + memset(p_virt_struct_area->virt_addr, 0, + sizeof(struct pvirtq_desc) * vq->queue_size + + sizeof(struct pvirtq_event_suppress) * 2 + sizeof(int) * vq->queue_size); + + pvirtq_layout->device_event_offset = sizeof(struct pvirtq_desc) * vq->queue_size; + pvirtq_layout->driver_event_offset = + pvirtq_layout->device_event_offset + sizeof(struct pvirtq_event_suppress); + + vq->desc = p_virt_struct_area->virt_addr; + vq->device_event = (void *)((uintptr_t)vq->desc + pvirtq_layout->device_event_offset); + vq->driver_event = (void *)((uintptr_t)vq->desc + pvirtq_layout->driver_event_offset); + + vq->next_avail = 0; + vq->next_used = 0; + vq->avail_wrap_count = 1; + vq->used_wrap_count = 1; + + /* + * Only possible if FPGA always delivers in-order + * Buffer ID used is the index in the p_packet_buffers array + */ + unsigned int i; + struct pvirtq_desc *p_desc = vq->desc; + + for (i = 0; i < vq->queue_size; i++) { + if (rx) { + p_desc[i].addr = (uint64_t)p_packet_buffers[i].phys_addr; + p_desc[i].len = p_packet_buffers[i].len; + } + + p_desc[i].id = i; + p_desc[i].flags = flags; + } + + if (rx) + vq->avail_wrap_count ^= 1; /* filled up available buffers for Rx */ + else + vq->used_wrap_count ^= 1; /* pre-fill free buffer IDs */ + + if (vq->queue_size == 0) + return -1; /* don't allocate memory with size of 0 bytes */ + + vq->p_virtual_addr = malloc(vq->queue_size * sizeof(*p_packet_buffers)); + + if (vq->p_virtual_addr == NULL) + return -1; + + memcpy(vq->p_virtual_addr, p_packet_buffers, vq->queue_size * sizeof(*p_packet_buffers)); + + /* Not used yet by FPGA - make sure we disable */ + vq->device_event->flags = RING_EVENT_FLAGS_DISABLE; + + return 0; +} + +static struct nthw_virt_queue * +nthw_setup_managed_rx_virt_queue_packed(nthw_dbs_t *p_nthw_dbs, + uint32_t index, + uint32_t queue_size, + uint32_t host_id, + uint32_t header, + struct nthw_memory_descriptor *p_virt_struct_area, + struct nthw_memory_descriptor *p_packet_buffers, + int irq_vector) +{ + struct pvirtq_struct_layout_s pvirtq_layout; + struct nthw_virt_queue *vq = &rxvq[index]; + /* Set size and setup packed vq ring */ + vq->queue_size = queue_size; + + /* Use Avail flag bit == 1 because wrap bit is initially set to 1 - and Used is inverse */ + if (nthw_setup_managed_virt_queue_packed(vq, &pvirtq_layout, p_virt_struct_area, + p_packet_buffers, + VIRTQ_DESC_F_WRITE | VIRTQ_DESC_F_AVAIL, 1) != 0) + return NULL; + + nthw_setup_rx_virt_queue(p_nthw_dbs, index, 0x8000, 0, /* start wrap ring counter as 1 */ + (void *)((uintptr_t)p_virt_struct_area->phys_addr + + pvirtq_layout.driver_event_offset), + (void *)((uintptr_t)p_virt_struct_area->phys_addr + + pvirtq_layout.device_event_offset), + p_virt_struct_area->phys_addr, (uint16_t)queue_size, host_id, + header, PACKED_RING, irq_vector); + + vq->usage = NTHW_VIRTQ_MANAGED; + return vq; +} + +static struct nthw_virt_queue * +nthw_setup_managed_tx_virt_queue_packed(nthw_dbs_t *p_nthw_dbs, + uint32_t index, + uint32_t queue_size, + uint32_t host_id, + uint32_t port, + uint32_t virtual_port, + uint32_t header, + int irq_vector, + uint32_t in_order, + struct nthw_memory_descriptor *p_virt_struct_area, + struct nthw_memory_descriptor *p_packet_buffers) +{ + struct pvirtq_struct_layout_s pvirtq_layout; + struct nthw_virt_queue *vq = &txvq[index]; + /* Set size and setup packed vq ring */ + vq->queue_size = queue_size; + + if (nthw_setup_managed_virt_queue_packed(vq, &pvirtq_layout, p_virt_struct_area, + p_packet_buffers, 0, 0) != 0) + return NULL; + + nthw_setup_tx_virt_queue(p_nthw_dbs, index, 0x8000, 0, /* start wrap ring counter as 1 */ + (void *)((uintptr_t)p_virt_struct_area->phys_addr + + pvirtq_layout.driver_event_offset), + (void *)((uintptr_t)p_virt_struct_area->phys_addr + + pvirtq_layout.device_event_offset), + p_virt_struct_area->phys_addr, (uint16_t)queue_size, host_id, + port, virtual_port, header, PACKED_RING, irq_vector, in_order); + + vq->usage = NTHW_VIRTQ_MANAGED; + return vq; +} + /* * Create a Managed Rx Virt Queue * @@ -630,6 +789,11 @@ nthw_setup_mngd_rx_virt_queue(nthw_dbs_t *p_nthw_dbs, host_id, header, p_virt_struct_area, p_packet_buffers, irq_vector); + case PACKED_RING: + return nthw_setup_managed_rx_virt_queue_packed(p_nthw_dbs, index, queue_size, + host_id, header, p_virt_struct_area, + p_packet_buffers, irq_vector); + default: break; } @@ -666,6 +830,13 @@ nthw_setup_mngd_tx_virt_queue(nthw_dbs_t *p_nthw_dbs, p_virt_struct_area, p_packet_buffers); + case PACKED_RING: + return nthw_setup_managed_tx_virt_queue_packed(p_nthw_dbs, index, queue_size, + host_id, port, virtual_port, header, + irq_vector, in_order, + p_virt_struct_area, + p_packet_buffers); + default: break; } diff --git a/drivers/net/ntnic/include/ntnic_virt_queue.h b/drivers/net/ntnic/include/ntnic_virt_queue.h index 97cb474dc8..d4c9a9835a 100644 --- a/drivers/net/ntnic/include/ntnic_virt_queue.h +++ b/drivers/net/ntnic/include/ntnic_virt_queue.h @@ -45,6 +45,9 @@ struct __rte_aligned(8) virtq_desc { uint16_t next; }; +/* additional packed ring flags */ +#define VIRTQ_DESC_F_AVAIL (1 << 7) + /* descr phys address must be 16 byte aligned */ struct __rte_aligned(16) pvirtq_desc { /* Buffer Address. */ @@ -57,6 +60,30 @@ struct __rte_aligned(16) pvirtq_desc { uint16_t flags; }; +/* Disable events */ +#define RING_EVENT_FLAGS_DISABLE 0x1 + +struct __rte_aligned(16) pvirtq_event_suppress { + union { + struct { + /* Descriptor Ring Change Event Offset */ + uint16_t desc_event_off : 15; + /* Descriptor Ring Change Event Wrap Counter */ + uint16_t desc_event_wrap : 1; + }; + /* If desc_event_flags set to RING_EVENT_FLAGS_DESC */ + uint16_t desc; + }; + + union { + struct { + uint16_t desc_event_flags : 2; /* Descriptor Ring Change Event Flags */ + uint16_t reserved : 14; /* Reserved, set to 0 */ + }; + uint16_t flags; + }; +}; + /* * Common virtq descr */