}
/**
- * ice_xsk_add_umem - add a UMEM region for XDP sockets
- * @vsi: VSI to which the UMEM will be added
- * @umem: pointer to a requested UMEM region
- * @qid: queue ID
- *
- * Returns 0 on success, negative on error
- */
-static int ice_xsk_add_umem(struct ice_vsi *vsi, struct xdp_umem *umem, u16 qid)
-{
- int err;
-
- err = ice_xsk_alloc_umems(vsi);
- if (err)
- return err;
-
- vsi->xsk_umems[qid] = umem;
- vsi->num_xsk_umems_used++;
-
- return 0;
-}
-
-/**
* ice_xsk_remove_umem - Remove an UMEM for a certain ring/qid
* @vsi: VSI from which the VSI will be removed
* @qid: Ring/qid associated with the UMEM
}
}
-/**
- * ice_xsk_umem_dma_map - DMA map UMEM region for XDP sockets
- * @vsi: VSI to map the UMEM region
- * @umem: UMEM to map
- *
- * Returns 0 on success, negative on error
- */
-static int ice_xsk_umem_dma_map(struct ice_vsi *vsi, struct xdp_umem *umem)
-{
- struct ice_pf *pf = vsi->back;
- struct device *dev;
- unsigned int i;
-
- dev = ice_pf_to_dev(pf);
- for (i = 0; i < umem->npgs; i++) {
- dma_addr_t dma = dma_map_page_attrs(dev, umem->pgs[i], 0,
- PAGE_SIZE,
- DMA_BIDIRECTIONAL,
- ICE_RX_DMA_ATTR);
- if (dma_mapping_error(dev, dma)) {
- dev_dbg(dev, "XSK UMEM DMA mapping error on page num %d\n",
- i);
- goto out_unmap;
- }
-
- umem->pages[i].dma = dma;
- }
-
- return 0;
-
-out_unmap:
- for (; i > 0; i--) {
- dma_unmap_page_attrs(dev, umem->pages[i].dma, PAGE_SIZE,
- DMA_BIDIRECTIONAL, ICE_RX_DMA_ATTR);
- umem->pages[i].dma = 0;
- }
-
- return -EFAULT;
-}
-
-/**
- * ice_xsk_umem_dma_unmap - DMA unmap UMEM region for XDP sockets
- * @vsi: VSI from which the UMEM will be unmapped
- * @umem: UMEM to unmap
- */
-static void ice_xsk_umem_dma_unmap(struct ice_vsi *vsi, struct xdp_umem *umem)
-{
- struct ice_pf *pf = vsi->back;
- struct device *dev;
- unsigned int i;
-
- dev = ice_pf_to_dev(pf);
- for (i = 0; i < umem->npgs; i++) {
- dma_unmap_page_attrs(dev, umem->pages[i].dma, PAGE_SIZE,
- DMA_BIDIRECTIONAL, ICE_RX_DMA_ATTR);
-
- umem->pages[i].dma = 0;
- }
-}
/**
* ice_xsk_umem_disable - disable a UMEM region
!vsi->xsk_umems[qid])
return -EINVAL;
- ice_xsk_umem_dma_unmap(vsi, vsi->xsk_umems[qid]);
+ xsk_buff_dma_unmap(vsi->xsk_umems[qid], ICE_RX_DMA_ATTR);
ice_xsk_remove_umem(vsi, qid);
return 0;
static int
ice_xsk_umem_enable(struct ice_vsi *vsi, struct xdp_umem *umem, u16 qid)
{
- struct xdp_umem_fq_reuse *reuseq;
int err;
if (vsi->type != ICE_VSI_PF)
if (qid >= vsi->num_xsk_umems)
return -EINVAL;
+ err = ice_xsk_alloc_umems(vsi);
+ if (err)
+ return err;
+
if (vsi->xsk_umems && vsi->xsk_umems[qid])
return -EBUSY;
- reuseq = xsk_reuseq_prepare(vsi->rx_rings[0]->count);
- if (!reuseq)
- return -ENOMEM;
-
- xsk_reuseq_free(xsk_reuseq_swap(umem, reuseq));
-
- err = ice_xsk_umem_dma_map(vsi, umem);
- if (err)
- return err;
+ vsi->xsk_umems[qid] = umem;
+ vsi->num_xsk_umems_used++;
- err = ice_xsk_add_umem(vsi, umem, qid);
+ err = xsk_buff_dma_map(vsi->xsk_umems[qid], ice_pf_to_dev(vsi->back),
+ ICE_RX_DMA_ATTR);
if (err)
return err;
}
/**
- * ice_zca_free - Callback for MEM_TYPE_ZERO_COPY allocations
- * @zca: zero-cpoy allocator
- * @handle: Buffer handle
- */
-void ice_zca_free(struct zero_copy_allocator *zca, unsigned long handle)
-{
- struct ice_rx_buf *rx_buf;
- struct ice_ring *rx_ring;
- struct xdp_umem *umem;
- u64 hr, mask;
- u16 nta;
-
- rx_ring = container_of(zca, struct ice_ring, zca);
- umem = rx_ring->xsk_umem;
- hr = umem->headroom + XDP_PACKET_HEADROOM;
-
- mask = umem->chunk_mask;
-
- nta = rx_ring->next_to_alloc;
- rx_buf = &rx_ring->rx_buf[nta];
-
- nta++;
- rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0;
-
- handle &= mask;
-
- rx_buf->dma = xdp_umem_get_dma(umem, handle);
- rx_buf->dma += hr;
-
- rx_buf->addr = xdp_umem_get_data(umem, handle);
- rx_buf->addr += hr;
-
- rx_buf->handle = (u64)handle + umem->headroom;
-}
-
-/**
- * ice_alloc_buf_fast_zc - Retrieve buffer address from XDP umem
- * @rx_ring: ring with an xdp_umem bound to it
- * @rx_buf: buffer to which xsk page address will be assigned
- *
- * This function allocates an Rx buffer in the hot path.
- * The buffer can come from fill queue or recycle queue.
- *
- * Returns true if an assignment was successful, false if not.
- */
-static __always_inline bool
-ice_alloc_buf_fast_zc(struct ice_ring *rx_ring, struct ice_rx_buf *rx_buf)
-{
- struct xdp_umem *umem = rx_ring->xsk_umem;
- void *addr = rx_buf->addr;
- u64 handle, hr;
-
- if (addr) {
- rx_ring->rx_stats.page_reuse_count++;
- return true;
- }
-
- if (!xsk_umem_peek_addr(umem, &handle)) {
- rx_ring->rx_stats.alloc_page_failed++;
- return false;
- }
-
- hr = umem->headroom + XDP_PACKET_HEADROOM;
-
- rx_buf->dma = xdp_umem_get_dma(umem, handle);
- rx_buf->dma += hr;
-
- rx_buf->addr = xdp_umem_get_data(umem, handle);
- rx_buf->addr += hr;
-
- rx_buf->handle = handle + umem->headroom;
-
- xsk_umem_release_addr(umem);
- return true;
-}
-
-/**
- * ice_alloc_buf_slow_zc - Retrieve buffer address from XDP umem
- * @rx_ring: ring with an xdp_umem bound to it
- * @rx_buf: buffer to which xsk page address will be assigned
- *
- * This function allocates an Rx buffer in the slow path.
- * The buffer can come from fill queue or recycle queue.
- *
- * Returns true if an assignment was successful, false if not.
- */
-static __always_inline bool
-ice_alloc_buf_slow_zc(struct ice_ring *rx_ring, struct ice_rx_buf *rx_buf)
-{
- struct xdp_umem *umem = rx_ring->xsk_umem;
- u64 handle, headroom;
-
- if (!xsk_umem_peek_addr_rq(umem, &handle)) {
- rx_ring->rx_stats.alloc_page_failed++;
- return false;
- }
-
- handle &= umem->chunk_mask;
- headroom = umem->headroom + XDP_PACKET_HEADROOM;
-
- rx_buf->dma = xdp_umem_get_dma(umem, handle);
- rx_buf->dma += headroom;
-
- rx_buf->addr = xdp_umem_get_data(umem, handle);
- rx_buf->addr += headroom;
-
- rx_buf->handle = handle + umem->headroom;
-
- xsk_umem_release_addr_rq(umem);
- return true;
-}
-
-/**
* ice_alloc_rx_bufs_zc - allocate a number of Rx buffers
* @rx_ring: Rx ring
* @count: The number of buffers to allocate
- * @alloc: the function pointer to call for allocation
*
* This function allocates a number of Rx buffers from the fill ring
* or the internal recycle mechanism and places them on the Rx ring.
*
* Returns false if all allocations were successful, true if any fail.
*/
-static bool
-ice_alloc_rx_bufs_zc(struct ice_ring *rx_ring, int count,
- bool (*alloc)(struct ice_ring *, struct ice_rx_buf *))
+bool ice_alloc_rx_bufs_zc(struct ice_ring *rx_ring, u16 count)
{
union ice_32b_rx_flex_desc *rx_desc;
u16 ntu = rx_ring->next_to_use;
struct ice_rx_buf *rx_buf;
bool ret = false;
+ dma_addr_t dma;
if (!count)
return false;
rx_buf = &rx_ring->rx_buf[ntu];
do {
- if (!alloc(rx_ring, rx_buf)) {
+ rx_buf->xdp = xsk_buff_alloc(rx_ring->xsk_umem);
+ if (!rx_buf->xdp) {
ret = true;
break;
}
- dma_sync_single_range_for_device(rx_ring->dev, rx_buf->dma, 0,
- rx_ring->rx_buf_len,
- DMA_BIDIRECTIONAL);
-
- rx_desc->read.pkt_addr = cpu_to_le64(rx_buf->dma);
+ dma = xsk_buff_xdp_get_dma(rx_buf->xdp);
+ rx_desc->read.pkt_addr = cpu_to_le64(dma);
rx_desc->wb.status_error0 = 0;
rx_desc++;
}
/**
- * ice_alloc_rx_bufs_fast_zc - allocate zero copy bufs in the hot path
- * @rx_ring: Rx ring
- * @count: number of bufs to allocate
- *
- * Returns false on success, true on failure.
- */
-static bool ice_alloc_rx_bufs_fast_zc(struct ice_ring *rx_ring, u16 count)
-{
- return ice_alloc_rx_bufs_zc(rx_ring, count,
- ice_alloc_buf_fast_zc);
-}
-
-/**
- * ice_alloc_rx_bufs_slow_zc - allocate zero copy bufs in the slow path
- * @rx_ring: Rx ring
- * @count: number of bufs to allocate
- *
- * Returns false on success, true on failure.
- */
-bool ice_alloc_rx_bufs_slow_zc(struct ice_ring *rx_ring, u16 count)
-{
- return ice_alloc_rx_bufs_zc(rx_ring, count,
- ice_alloc_buf_slow_zc);
-}
-
-/**
* ice_bump_ntc - Bump the next_to_clean counter of an Rx ring
* @rx_ring: Rx ring
*/
}
/**
- * ice_get_rx_buf_zc - Fetch the current Rx buffer
- * @rx_ring: Rx ring
- * @size: size of a buffer
- *
- * This function returns the current, received Rx buffer and does
- * DMA synchronization.
- *
- * Returns a pointer to the received Rx buffer.
- */
-static struct ice_rx_buf *ice_get_rx_buf_zc(struct ice_ring *rx_ring, int size)
-{
- struct ice_rx_buf *rx_buf;
-
- rx_buf = &rx_ring->rx_buf[rx_ring->next_to_clean];
-
- dma_sync_single_range_for_cpu(rx_ring->dev, rx_buf->dma, 0,
- size, DMA_BIDIRECTIONAL);
-
- return rx_buf;
-}
-
-/**
- * ice_reuse_rx_buf_zc - reuse an Rx buffer
- * @rx_ring: Rx ring
- * @old_buf: The buffer to recycle
- *
- * This function recycles a finished Rx buffer, and places it on the recycle
- * queue (next_to_alloc).
- */
-static void
-ice_reuse_rx_buf_zc(struct ice_ring *rx_ring, struct ice_rx_buf *old_buf)
-{
- unsigned long mask = (unsigned long)rx_ring->xsk_umem->chunk_mask;
- u64 hr = rx_ring->xsk_umem->headroom + XDP_PACKET_HEADROOM;
- u16 nta = rx_ring->next_to_alloc;
- struct ice_rx_buf *new_buf;
-
- new_buf = &rx_ring->rx_buf[nta++];
- rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0;
-
- new_buf->dma = old_buf->dma & mask;
- new_buf->dma += hr;
-
- new_buf->addr = (void *)((unsigned long)old_buf->addr & mask);
- new_buf->addr += hr;
-
- new_buf->handle = old_buf->handle & mask;
- new_buf->handle += rx_ring->xsk_umem->headroom;
-
- old_buf->addr = NULL;
-}
-
-/**
* ice_construct_skb_zc - Create an sk_buff from zero-copy buffer
* @rx_ring: Rx ring
* @rx_buf: zero-copy Rx buffer
- * @xdp: XDP buffer
*
* This function allocates a new skb from a zero-copy Rx buffer.
*
* Returns the skb on success, NULL on failure.
*/
static struct sk_buff *
-ice_construct_skb_zc(struct ice_ring *rx_ring, struct ice_rx_buf *rx_buf,
- struct xdp_buff *xdp)
+ice_construct_skb_zc(struct ice_ring *rx_ring, struct ice_rx_buf *rx_buf)
{
- unsigned int metasize = xdp->data - xdp->data_meta;
- unsigned int datasize = xdp->data_end - xdp->data;
- unsigned int datasize_hard = xdp->data_end -
- xdp->data_hard_start;
+ unsigned int metasize = rx_buf->xdp->data - rx_buf->xdp->data_meta;
+ unsigned int datasize = rx_buf->xdp->data_end - rx_buf->xdp->data;
+ unsigned int datasize_hard = rx_buf->xdp->data_end -
+ rx_buf->xdp->data_hard_start;
struct sk_buff *skb;
skb = __napi_alloc_skb(&rx_ring->q_vector->napi, datasize_hard,
if (unlikely(!skb))
return NULL;
- skb_reserve(skb, xdp->data - xdp->data_hard_start);
- memcpy(__skb_put(skb, datasize), xdp->data, datasize);
+ skb_reserve(skb, rx_buf->xdp->data - rx_buf->xdp->data_hard_start);
+ memcpy(__skb_put(skb, datasize), rx_buf->xdp->data, datasize);
if (metasize)
skb_metadata_set(skb, metasize);
- ice_reuse_rx_buf_zc(rx_ring, rx_buf);
-
+ xsk_buff_free(rx_buf->xdp);
+ rx_buf->xdp = NULL;
return skb;
}
}
act = bpf_prog_run_xdp(xdp_prog, xdp);
- xdp->handle += xdp->data - xdp->data_hard_start;
switch (act) {
case XDP_PASS:
break;
{
unsigned int total_rx_bytes = 0, total_rx_packets = 0;
u16 cleaned_count = ICE_DESC_UNUSED(rx_ring);
- struct xdp_umem *umem = rx_ring->xsk_umem;
unsigned int xdp_xmit = 0;
bool failure = false;
- struct xdp_buff xdp;
-
- xdp.rxq = &rx_ring->xdp_rxq;
- xdp.frame_sz = xsk_umem_xdp_frame_sz(umem);
while (likely(total_rx_packets < (unsigned int)budget)) {
union ice_32b_rx_flex_desc *rx_desc;
u8 rx_ptype;
if (cleaned_count >= ICE_RX_BUF_WRITE) {
- failure |= ice_alloc_rx_bufs_fast_zc(rx_ring,
- cleaned_count);
+ failure |= ice_alloc_rx_bufs_zc(rx_ring,
+ cleaned_count);
cleaned_count = 0;
}
if (!size)
break;
- rx_buf = ice_get_rx_buf_zc(rx_ring, size);
- if (!rx_buf->addr)
- break;
- xdp.data = rx_buf->addr;
- xdp.data_meta = xdp.data;
- xdp.data_hard_start = xdp.data - XDP_PACKET_HEADROOM;
- xdp.data_end = xdp.data + size;
- xdp.handle = rx_buf->handle;
+ rx_buf = &rx_ring->rx_buf[rx_ring->next_to_clean];
+ rx_buf->xdp->data_end = rx_buf->xdp->data + size;
+ xsk_buff_dma_sync_for_cpu(rx_buf->xdp);
- xdp_res = ice_run_xdp_zc(rx_ring, &xdp);
+ xdp_res = ice_run_xdp_zc(rx_ring, rx_buf->xdp);
if (xdp_res) {
- if (xdp_res & (ICE_XDP_TX | ICE_XDP_REDIR)) {
+ if (xdp_res & (ICE_XDP_TX | ICE_XDP_REDIR))
xdp_xmit |= xdp_res;
- rx_buf->addr = NULL;
- } else {
- ice_reuse_rx_buf_zc(rx_ring, rx_buf);
- }
+ else
+ xsk_buff_free(rx_buf->xdp);
+ rx_buf->xdp = NULL;
total_rx_bytes += size;
total_rx_packets++;
cleaned_count++;
}
/* XDP_PASS path */
- skb = ice_construct_skb_zc(rx_ring, rx_buf, &xdp);
+ skb = ice_construct_skb_zc(rx_ring, rx_buf);
if (!skb) {
rx_ring->rx_stats.alloc_buf_failed++;
break;
if (!xsk_umem_consume_tx(xdp_ring->xsk_umem, &desc))
break;
- dma = xdp_umem_get_dma(xdp_ring->xsk_umem, desc.addr);
-
- dma_sync_single_for_device(xdp_ring->dev, dma, desc.len,
- DMA_BIDIRECTIONAL);
+ dma = xsk_buff_raw_get_dma(xdp_ring->xsk_umem, desc.addr);
+ xsk_buff_raw_dma_sync_for_device(xdp_ring->xsk_umem, dma,
+ desc.len);
tx_buf->bytecount = desc.len;
for (i = 0; i < rx_ring->count; i++) {
struct ice_rx_buf *rx_buf = &rx_ring->rx_buf[i];
- if (!rx_buf->addr)
+ if (!rx_buf->xdp)
continue;
- xsk_umem_fq_reuse(rx_ring->xsk_umem, rx_buf->handle);
- rx_buf->addr = NULL;
+ rx_buf->xdp = NULL;
}
}
projects / platform / kernel / linux-starfive.git / commitdiff