sizeof(*rx_ring->rx_bi_zc) * rx_ring->count);
}
-static struct i40e_rx_buffer_zc *i40e_rx_bi(struct i40e_ring *rx_ring, u32 idx)
+static struct xdp_buff **i40e_rx_bi(struct i40e_ring *rx_ring, u32 idx)
{
return &rx_ring->rx_bi_zc[idx];
}
-/**
- * i40e_xsk_umem_dma_map - DMA maps all UMEM memory for the netdev
- * @vsi: Current VSI
- * @umem: UMEM to DMA map
- *
- * Returns 0 on success, <0 on failure
- **/
-static int i40e_xsk_umem_dma_map(struct i40e_vsi *vsi, struct xdp_umem *umem)
-{
- struct i40e_pf *pf = vsi->back;
- struct device *dev;
- unsigned int i, j;
- dma_addr_t dma;
-
- dev = &pf->pdev->dev;
- for (i = 0; i < umem->npgs; i++) {
- dma = dma_map_page_attrs(dev, umem->pgs[i], 0, PAGE_SIZE,
- DMA_BIDIRECTIONAL, I40E_RX_DMA_ATTR);
- if (dma_mapping_error(dev, dma))
- goto out_unmap;
-
- umem->pages[i].dma = dma;
- }
-
- return 0;
-
-out_unmap:
- for (j = 0; j < i; j++) {
- dma_unmap_page_attrs(dev, umem->pages[i].dma, PAGE_SIZE,
- DMA_BIDIRECTIONAL, I40E_RX_DMA_ATTR);
- umem->pages[i].dma = 0;
- }
-
- return -1;
-}
-
-/**
- * i40e_xsk_umem_dma_unmap - DMA unmaps all UMEM memory for the netdev
- * @vsi: Current VSI
- * @umem: UMEM to DMA map
- **/
-static void i40e_xsk_umem_dma_unmap(struct i40e_vsi *vsi, struct xdp_umem *umem)
-{
- struct i40e_pf *pf = vsi->back;
- struct device *dev;
- unsigned int i;
-
- dev = &pf->pdev->dev;
-
- for (i = 0; i < umem->npgs; i++) {
- dma_unmap_page_attrs(dev, umem->pages[i].dma, PAGE_SIZE,
- DMA_BIDIRECTIONAL, I40E_RX_DMA_ATTR);
-
- umem->pages[i].dma = 0;
- }
-}
-
/**
* i40e_xsk_umem_enable - Enable/associate a UMEM to a certain ring/qid
* @vsi: Current VSI
u16 qid)
{
struct net_device *netdev = vsi->netdev;
- struct xdp_umem_fq_reuse *reuseq;
bool if_running;
int err;
qid >= netdev->real_num_tx_queues)
return -EINVAL;
- reuseq = xsk_reuseq_prepare(vsi->rx_rings[0]->count);
- if (!reuseq)
- return -ENOMEM;
-
- xsk_reuseq_free(xsk_reuseq_swap(umem, reuseq));
-
- err = i40e_xsk_umem_dma_map(vsi, umem);
+ err = xsk_buff_dma_map(umem, &vsi->back->pdev->dev, I40E_RX_DMA_ATTR);
if (err)
return err;
}
clear_bit(qid, vsi->af_xdp_zc_qps);
- i40e_xsk_umem_dma_unmap(vsi, umem);
+ xsk_buff_dma_unmap(umem, I40E_RX_DMA_ATTR);
if (if_running) {
err = i40e_queue_pair_enable(vsi, qid);
**/
static int i40e_run_xdp_zc(struct i40e_ring *rx_ring, struct xdp_buff *xdp)
{
- struct xdp_umem *umem = rx_ring->xsk_umem;
int err, result = I40E_XDP_PASS;
struct i40e_ring *xdp_ring;
struct bpf_prog *xdp_prog;
- u64 offset;
u32 act;
rcu_read_lock();
*/
xdp_prog = READ_ONCE(rx_ring->xdp_prog);
act = bpf_prog_run_xdp(xdp_prog, xdp);
- offset = xdp->data - xdp->data_hard_start;
-
- xdp->handle = xsk_umem_adjust_offset(umem, xdp->handle, offset);
switch (act) {
case XDP_PASS:
return result;
}
-/**
- * i40e_alloc_buffer_zc - Allocates an i40e_rx_buffer_zc
- * @rx_ring: Rx ring
- * @bi: Rx buffer to populate
- *
- * This function allocates an Rx buffer. The buffer can come from fill
- * queue, or via the recycle queue (next_to_alloc).
- *
- * Returns true for a successful allocation, false otherwise
- **/
-static bool i40e_alloc_buffer_zc(struct i40e_ring *rx_ring,
- struct i40e_rx_buffer_zc *bi)
-{
- struct xdp_umem *umem = rx_ring->xsk_umem;
- void *addr = bi->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;
-
- bi->dma = xdp_umem_get_dma(umem, handle);
- bi->dma += hr;
-
- bi->addr = xdp_umem_get_data(umem, handle);
- bi->addr += hr;
-
- bi->handle = xsk_umem_adjust_offset(umem, handle, umem->headroom);
-
- xsk_umem_release_addr(umem);
- return true;
-}
-
-/**
- * i40e_alloc_buffer_slow_zc - Allocates an i40e_rx_buffer_zc
- * @rx_ring: Rx ring
- * @bi: Rx buffer to populate
- *
- * This function allocates an Rx buffer. The buffer can come from fill
- * queue, or via the reuse queue.
- *
- * Returns true for a successful allocation, false otherwise
- **/
-static bool i40e_alloc_buffer_slow_zc(struct i40e_ring *rx_ring,
- struct i40e_rx_buffer_zc *bi)
-{
- struct xdp_umem *umem = rx_ring->xsk_umem;
- u64 handle, hr;
-
- if (!xsk_umem_peek_addr_rq(umem, &handle)) {
- rx_ring->rx_stats.alloc_page_failed++;
- return false;
- }
-
- handle &= rx_ring->xsk_umem->chunk_mask;
-
- hr = umem->headroom + XDP_PACKET_HEADROOM;
-
- bi->dma = xdp_umem_get_dma(umem, handle);
- bi->dma += hr;
-
- bi->addr = xdp_umem_get_data(umem, handle);
- bi->addr += hr;
-
- bi->handle = xsk_umem_adjust_offset(umem, handle, umem->headroom);
-
- xsk_umem_release_addr_rq(umem);
- return true;
-}
-
-static __always_inline bool
-__i40e_alloc_rx_buffers_zc(struct i40e_ring *rx_ring, u16 count,
- bool alloc(struct i40e_ring *rx_ring,
- struct i40e_rx_buffer_zc *bi))
+bool i40e_alloc_rx_buffers_zc(struct i40e_ring *rx_ring, u16 count)
{
u16 ntu = rx_ring->next_to_use;
union i40e_rx_desc *rx_desc;
- struct i40e_rx_buffer_zc *bi;
+ struct xdp_buff **bi, *xdp;
+ dma_addr_t dma;
bool ok = true;
rx_desc = I40E_RX_DESC(rx_ring, ntu);
bi = i40e_rx_bi(rx_ring, ntu);
do {
- if (!alloc(rx_ring, bi)) {
+ xdp = xsk_buff_alloc(rx_ring->xsk_umem);
+ if (!xdp) {
ok = false;
goto no_buffers;
}
-
- dma_sync_single_range_for_device(rx_ring->dev, bi->dma, 0,
- rx_ring->rx_buf_len,
- DMA_BIDIRECTIONAL);
-
- rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
+ *bi = xdp;
+ dma = xsk_buff_xdp_get_dma(xdp);
+ rx_desc->read.pkt_addr = cpu_to_le64(dma);
+ rx_desc->read.hdr_addr = 0;
rx_desc++;
bi++;
ntu = 0;
}
- rx_desc->wb.qword1.status_error_len = 0;
count--;
} while (count);
return ok;
}
-/**
- * i40e_alloc_rx_buffers_zc - Allocates a number of Rx buffers
- * @rx_ring: Rx ring
- * @count: The number of buffers to allocate
- *
- * This function allocates a number of Rx buffers from the reuse queue
- * or fill ring and places them on the Rx ring.
- *
- * Returns true for a successful allocation, false otherwise
- **/
-bool i40e_alloc_rx_buffers_zc(struct i40e_ring *rx_ring, u16 count)
-{
- return __i40e_alloc_rx_buffers_zc(rx_ring, count,
- i40e_alloc_buffer_slow_zc);
-}
-
-/**
- * i40e_alloc_rx_buffers_fast_zc - Allocates a number of Rx buffers
- * @rx_ring: Rx ring
- * @count: The number of buffers to allocate
- *
- * 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 true for a successful allocation, false otherwise
- **/
-static bool i40e_alloc_rx_buffers_fast_zc(struct i40e_ring *rx_ring, u16 count)
-{
- return __i40e_alloc_rx_buffers_zc(rx_ring, count,
- i40e_alloc_buffer_zc);
-}
-
-/**
- * i40e_get_rx_buffer_zc - Return the current Rx buffer
- * @rx_ring: Rx ring
- * @size: The size of the rx buffer (read from descriptor)
- *
- * This function returns the current, received Rx buffer, and also
- * does DMA synchronization. the Rx ring.
- *
- * Returns the received Rx buffer
- **/
-static struct i40e_rx_buffer_zc *i40e_get_rx_buffer_zc(
- struct i40e_ring *rx_ring,
- const unsigned int size)
-{
- struct i40e_rx_buffer_zc *bi;
-
- bi = i40e_rx_bi(rx_ring, rx_ring->next_to_clean);
-
- /* we are reusing so sync this buffer for CPU use */
- dma_sync_single_range_for_cpu(rx_ring->dev,
- bi->dma, 0,
- size,
- DMA_BIDIRECTIONAL);
-
- return bi;
-}
-
-/**
- * i40e_reuse_rx_buffer_zc - Recycle an Rx buffer
- * @rx_ring: Rx ring
- * @old_bi: The Rx buffer to recycle
- *
- * This function recycles a finished Rx buffer, and places it on the
- * recycle queue (next_to_alloc).
- **/
-static void i40e_reuse_rx_buffer_zc(struct i40e_ring *rx_ring,
- struct i40e_rx_buffer_zc *old_bi)
-{
- struct i40e_rx_buffer_zc *new_bi = i40e_rx_bi(rx_ring,
- rx_ring->next_to_alloc);
- u16 nta = rx_ring->next_to_alloc;
-
- /* update, and store next to alloc */
- nta++;
- rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0;
-
- /* transfer page from old buffer to new buffer */
- new_bi->dma = old_bi->dma;
- new_bi->addr = old_bi->addr;
- new_bi->handle = old_bi->handle;
-
- old_bi->addr = NULL;
-}
-
-/**
- * i40e_zca_free - Free callback for MEM_TYPE_ZERO_COPY allocations
- * @alloc: Zero-copy allocator
- * @handle: Buffer handle
- **/
-void i40e_zca_free(struct zero_copy_allocator *alloc, unsigned long handle)
-{
- struct i40e_rx_buffer_zc *bi;
- struct i40e_ring *rx_ring;
- u64 hr, mask;
- u16 nta;
-
- rx_ring = container_of(alloc, struct i40e_ring, zca);
- hr = rx_ring->xsk_umem->headroom + XDP_PACKET_HEADROOM;
- mask = rx_ring->xsk_umem->chunk_mask;
-
- nta = rx_ring->next_to_alloc;
- bi = i40e_rx_bi(rx_ring, nta);
-
- nta++;
- rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0;
-
- handle &= mask;
-
- bi->dma = xdp_umem_get_dma(rx_ring->xsk_umem, handle);
- bi->dma += hr;
-
- bi->addr = xdp_umem_get_data(rx_ring->xsk_umem, handle);
- bi->addr += hr;
-
- bi->handle = xsk_umem_adjust_offset(rx_ring->xsk_umem, (u64)handle,
- rx_ring->xsk_umem->headroom);
-}
-
/**
* i40e_construct_skb_zc - Create skbufff from zero-copy Rx buffer
* @rx_ring: Rx ring
- * @bi: Rx buffer
* @xdp: xdp_buff
*
* This functions allocates a new skb from a zero-copy Rx buffer.
* Returns the skb, or NULL on failure.
**/
static struct sk_buff *i40e_construct_skb_zc(struct i40e_ring *rx_ring,
- struct i40e_rx_buffer_zc *bi,
struct xdp_buff *xdp)
{
unsigned int metasize = xdp->data - xdp->data_meta;
if (metasize)
skb_metadata_set(skb, metasize);
- i40e_reuse_rx_buffer_zc(rx_ring, bi);
+ xsk_buff_free(xdp);
return skb;
}
{
unsigned int total_rx_bytes = 0, total_rx_packets = 0;
u16 cleaned_count = I40E_DESC_UNUSED(rx_ring);
- struct xdp_umem *umem = rx_ring->xsk_umem;
unsigned int xdp_res, xdp_xmit = 0;
bool failure = false;
struct sk_buff *skb;
- 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)) {
- struct i40e_rx_buffer_zc *bi;
union i40e_rx_desc *rx_desc;
+ struct xdp_buff **bi;
unsigned int size;
u64 qword;
if (cleaned_count >= I40E_RX_BUFFER_WRITE) {
failure = failure ||
- !i40e_alloc_rx_buffers_fast_zc(rx_ring,
- cleaned_count);
+ !i40e_alloc_rx_buffers_zc(rx_ring,
+ cleaned_count);
cleaned_count = 0;
}
rx_desc->raw.qword[0],
qword);
bi = i40e_rx_bi(rx_ring, rx_ring->next_to_clean);
- i40e_inc_ntc(rx_ring);
- i40e_reuse_rx_buffer_zc(rx_ring, bi);
+ xsk_buff_free(*bi);
+ *bi = NULL;
cleaned_count++;
+ i40e_inc_ntc(rx_ring);
continue;
}
if (!size)
break;
- bi = i40e_get_rx_buffer_zc(rx_ring, size);
- xdp.data = bi->addr;
- xdp.data_meta = xdp.data;
- xdp.data_hard_start = xdp.data - XDP_PACKET_HEADROOM;
- xdp.data_end = xdp.data + size;
- xdp.handle = bi->handle;
+ bi = i40e_rx_bi(rx_ring, rx_ring->next_to_clean);
+ (*bi)->data_end = (*bi)->data + size;
+ xsk_buff_dma_sync_for_cpu(*bi);
- xdp_res = i40e_run_xdp_zc(rx_ring, &xdp);
+ xdp_res = i40e_run_xdp_zc(rx_ring, *bi);
if (xdp_res) {
- if (xdp_res & (I40E_XDP_TX | I40E_XDP_REDIR)) {
+ if (xdp_res & (I40E_XDP_TX | I40E_XDP_REDIR))
xdp_xmit |= xdp_res;
- bi->addr = NULL;
- } else {
- i40e_reuse_rx_buffer_zc(rx_ring, bi);
- }
+ else
+ xsk_buff_free(*bi);
+ *bi = NULL;
total_rx_bytes += size;
total_rx_packets++;
* BIT(I40E_RXD_QW1_ERROR_SHIFT). This is due to that
* SBP is *not* set in PRT_SBPVSI (default not set).
*/
- skb = i40e_construct_skb_zc(rx_ring, bi, &xdp);
+ skb = i40e_construct_skb_zc(rx_ring, *bi);
+ *bi = NULL;
if (!skb) {
rx_ring->rx_stats.alloc_buff_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_bi = &xdp_ring->tx_bi[xdp_ring->next_to_use];
tx_bi->bytecount = desc.len;
u16 i;
for (i = 0; i < rx_ring->count; i++) {
- struct i40e_rx_buffer_zc *rx_bi = i40e_rx_bi(rx_ring, i);
+ struct xdp_buff *rx_bi = *i40e_rx_bi(rx_ring, i);
- if (!rx_bi->addr)
+ if (!rx_bi)
continue;
- xsk_umem_fq_reuse(rx_ring->xsk_umem, rx_bi->handle);
- rx_bi->addr = NULL;
+ xsk_buff_free(rx_bi);
+ rx_bi = NULL;
}
}
projects / linux-2.6-microblaze.git / commitdiff