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path: root/drivers/net/ethernet/netronome/nfp/bpf/cmsg.c
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Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/bpf/cmsg.c')
-rw-r--r--drivers/net/ethernet/netronome/nfp/bpf/cmsg.c236
1 files changed, 19 insertions, 217 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/bpf/cmsg.c b/drivers/net/ethernet/netronome/nfp/bpf/cmsg.c
index 9b6cfa697879..bc9850e4ec5e 100644
--- a/drivers/net/ethernet/netronome/nfp/bpf/cmsg.c
+++ b/drivers/net/ethernet/netronome/nfp/bpf/cmsg.c
@@ -6,48 +6,13 @@
#include <linux/bug.h>
#include <linux/jiffies.h>
#include <linux/skbuff.h>
-#include <linux/wait.h>
+#include "../ccm.h"
#include "../nfp_app.h"
#include "../nfp_net.h"
#include "fw.h"
#include "main.h"
-#define NFP_BPF_TAG_ALLOC_SPAN (U16_MAX / 4)
-
-static bool nfp_bpf_all_tags_busy(struct nfp_app_bpf *bpf)
-{
- u16 used_tags;
-
- used_tags = bpf->tag_alloc_next - bpf->tag_alloc_last;
-
- return used_tags > NFP_BPF_TAG_ALLOC_SPAN;
-}
-
-static int nfp_bpf_alloc_tag(struct nfp_app_bpf *bpf)
-{
- /* All FW communication for BPF is request-reply. To make sure we
- * don't reuse the message ID too early after timeout - limit the
- * number of requests in flight.
- */
- if (nfp_bpf_all_tags_busy(bpf)) {
- cmsg_warn(bpf, "all FW request contexts busy!\n");
- return -EAGAIN;
- }
-
- WARN_ON(__test_and_set_bit(bpf->tag_alloc_next, bpf->tag_allocator));
- return bpf->tag_alloc_next++;
-}
-
-static void nfp_bpf_free_tag(struct nfp_app_bpf *bpf, u16 tag)
-{
- WARN_ON(!__test_and_clear_bit(tag, bpf->tag_allocator));
-
- while (!test_bit(bpf->tag_alloc_last, bpf->tag_allocator) &&
- bpf->tag_alloc_last != bpf->tag_alloc_next)
- bpf->tag_alloc_last++;
-}
-
static struct sk_buff *
nfp_bpf_cmsg_alloc(struct nfp_app_bpf *bpf, unsigned int size)
{
@@ -87,149 +52,6 @@ nfp_bpf_cmsg_map_reply_size(struct nfp_app_bpf *bpf, unsigned int n)
return size;
}
-static u8 nfp_bpf_cmsg_get_type(struct sk_buff *skb)
-{
- struct cmsg_hdr *hdr;
-
- hdr = (struct cmsg_hdr *)skb->data;
-
- return hdr->type;
-}
-
-static unsigned int nfp_bpf_cmsg_get_tag(struct sk_buff *skb)
-{
- struct cmsg_hdr *hdr;
-
- hdr = (struct cmsg_hdr *)skb->data;
-
- return be16_to_cpu(hdr->tag);
-}
-
-static struct sk_buff *__nfp_bpf_reply(struct nfp_app_bpf *bpf, u16 tag)
-{
- unsigned int msg_tag;
- struct sk_buff *skb;
-
- skb_queue_walk(&bpf->cmsg_replies, skb) {
- msg_tag = nfp_bpf_cmsg_get_tag(skb);
- if (msg_tag == tag) {
- nfp_bpf_free_tag(bpf, tag);
- __skb_unlink(skb, &bpf->cmsg_replies);
- return skb;
- }
- }
-
- return NULL;
-}
-
-static struct sk_buff *nfp_bpf_reply(struct nfp_app_bpf *bpf, u16 tag)
-{
- struct sk_buff *skb;
-
- nfp_ctrl_lock(bpf->app->ctrl);
- skb = __nfp_bpf_reply(bpf, tag);
- nfp_ctrl_unlock(bpf->app->ctrl);
-
- return skb;
-}
-
-static struct sk_buff *nfp_bpf_reply_drop_tag(struct nfp_app_bpf *bpf, u16 tag)
-{
- struct sk_buff *skb;
-
- nfp_ctrl_lock(bpf->app->ctrl);
- skb = __nfp_bpf_reply(bpf, tag);
- if (!skb)
- nfp_bpf_free_tag(bpf, tag);
- nfp_ctrl_unlock(bpf->app->ctrl);
-
- return skb;
-}
-
-static struct sk_buff *
-nfp_bpf_cmsg_wait_reply(struct nfp_app_bpf *bpf, enum nfp_bpf_cmsg_type type,
- int tag)
-{
- struct sk_buff *skb;
- int i, err;
-
- for (i = 0; i < 50; i++) {
- udelay(4);
- skb = nfp_bpf_reply(bpf, tag);
- if (skb)
- return skb;
- }
-
- err = wait_event_interruptible_timeout(bpf->cmsg_wq,
- skb = nfp_bpf_reply(bpf, tag),
- msecs_to_jiffies(5000));
- /* We didn't get a response - try last time and atomically drop
- * the tag even if no response is matched.
- */
- if (!skb)
- skb = nfp_bpf_reply_drop_tag(bpf, tag);
- if (err < 0) {
- cmsg_warn(bpf, "%s waiting for response to 0x%02x: %d\n",
- err == ERESTARTSYS ? "interrupted" : "error",
- type, err);
- return ERR_PTR(err);
- }
- if (!skb) {
- cmsg_warn(bpf, "timeout waiting for response to 0x%02x\n",
- type);
- return ERR_PTR(-ETIMEDOUT);
- }
-
- return skb;
-}
-
-static struct sk_buff *
-nfp_bpf_cmsg_communicate(struct nfp_app_bpf *bpf, struct sk_buff *skb,
- enum nfp_bpf_cmsg_type type, unsigned int reply_size)
-{
- struct cmsg_hdr *hdr;
- int tag;
-
- nfp_ctrl_lock(bpf->app->ctrl);
- tag = nfp_bpf_alloc_tag(bpf);
- if (tag < 0) {
- nfp_ctrl_unlock(bpf->app->ctrl);
- dev_kfree_skb_any(skb);
- return ERR_PTR(tag);
- }
-
- hdr = (void *)skb->data;
- hdr->ver = CMSG_MAP_ABI_VERSION;
- hdr->type = type;
- hdr->tag = cpu_to_be16(tag);
-
- __nfp_app_ctrl_tx(bpf->app, skb);
-
- nfp_ctrl_unlock(bpf->app->ctrl);
-
- skb = nfp_bpf_cmsg_wait_reply(bpf, type, tag);
- if (IS_ERR(skb))
- return skb;
-
- hdr = (struct cmsg_hdr *)skb->data;
- if (hdr->type != __CMSG_REPLY(type)) {
- cmsg_warn(bpf, "cmsg drop - wrong type 0x%02x != 0x%02lx!\n",
- hdr->type, __CMSG_REPLY(type));
- goto err_free;
- }
- /* 0 reply_size means caller will do the validation */
- if (reply_size && skb->len != reply_size) {
- cmsg_warn(bpf, "cmsg drop - type 0x%02x wrong size %d != %d!\n",
- type, skb->len, reply_size);
- goto err_free;
- }
-
- return skb;
-err_free:
- dev_kfree_skb_any(skb);
- return ERR_PTR(-EIO);
-}
-
static int
nfp_bpf_ctrl_rc_to_errno(struct nfp_app_bpf *bpf,
struct cmsg_reply_map_simple *reply)
@@ -275,8 +97,8 @@ nfp_bpf_ctrl_alloc_map(struct nfp_app_bpf *bpf, struct bpf_map *map)
req->map_type = cpu_to_be32(map->map_type);
req->map_flags = 0;
- skb = nfp_bpf_cmsg_communicate(bpf, skb, CMSG_TYPE_MAP_ALLOC,
- sizeof(*reply));
+ skb = nfp_ccm_communicate(&bpf->ccm, skb, NFP_CCM_TYPE_BPF_MAP_ALLOC,
+ sizeof(*reply));
if (IS_ERR(skb))
return PTR_ERR(skb);
@@ -310,8 +132,8 @@ void nfp_bpf_ctrl_free_map(struct nfp_app_bpf *bpf, struct nfp_bpf_map *nfp_map)
req = (void *)skb->data;
req->tid = cpu_to_be32(nfp_map->tid);
- skb = nfp_bpf_cmsg_communicate(bpf, skb, CMSG_TYPE_MAP_FREE,
- sizeof(*reply));
+ skb = nfp_ccm_communicate(&bpf->ccm, skb, NFP_CCM_TYPE_BPF_MAP_FREE,
+ sizeof(*reply));
if (IS_ERR(skb)) {
cmsg_warn(bpf, "leaking map - I/O error\n");
return;
@@ -354,8 +176,7 @@ nfp_bpf_ctrl_reply_val(struct nfp_app_bpf *bpf, struct cmsg_reply_map_op *reply,
}
static int
-nfp_bpf_ctrl_entry_op(struct bpf_offloaded_map *offmap,
- enum nfp_bpf_cmsg_type op,
+nfp_bpf_ctrl_entry_op(struct bpf_offloaded_map *offmap, enum nfp_ccm_type op,
u8 *key, u8 *value, u64 flags, u8 *out_key, u8 *out_value)
{
struct nfp_bpf_map *nfp_map = offmap->dev_priv;
@@ -386,8 +207,8 @@ nfp_bpf_ctrl_entry_op(struct bpf_offloaded_map *offmap,
memcpy(nfp_bpf_ctrl_req_val(bpf, req, 0), value,
map->value_size);
- skb = nfp_bpf_cmsg_communicate(bpf, skb, op,
- nfp_bpf_cmsg_map_reply_size(bpf, 1));
+ skb = nfp_ccm_communicate(&bpf->ccm, skb, op,
+ nfp_bpf_cmsg_map_reply_size(bpf, 1));
if (IS_ERR(skb))
return PTR_ERR(skb);
@@ -415,34 +236,34 @@ err_free:
int nfp_bpf_ctrl_update_entry(struct bpf_offloaded_map *offmap,
void *key, void *value, u64 flags)
{
- return nfp_bpf_ctrl_entry_op(offmap, CMSG_TYPE_MAP_UPDATE,
+ return nfp_bpf_ctrl_entry_op(offmap, NFP_CCM_TYPE_BPF_MAP_UPDATE,
key, value, flags, NULL, NULL);
}
int nfp_bpf_ctrl_del_entry(struct bpf_offloaded_map *offmap, void *key)
{
- return nfp_bpf_ctrl_entry_op(offmap, CMSG_TYPE_MAP_DELETE,
+ return nfp_bpf_ctrl_entry_op(offmap, NFP_CCM_TYPE_BPF_MAP_DELETE,
key, NULL, 0, NULL, NULL);
}
int nfp_bpf_ctrl_lookup_entry(struct bpf_offloaded_map *offmap,
void *key, void *value)
{
- return nfp_bpf_ctrl_entry_op(offmap, CMSG_TYPE_MAP_LOOKUP,
+ return nfp_bpf_ctrl_entry_op(offmap, NFP_CCM_TYPE_BPF_MAP_LOOKUP,
key, NULL, 0, NULL, value);
}
int nfp_bpf_ctrl_getfirst_entry(struct bpf_offloaded_map *offmap,
void *next_key)
{
- return nfp_bpf_ctrl_entry_op(offmap, CMSG_TYPE_MAP_GETFIRST,
+ return nfp_bpf_ctrl_entry_op(offmap, NFP_CCM_TYPE_BPF_MAP_GETFIRST,
NULL, NULL, 0, next_key, NULL);
}
int nfp_bpf_ctrl_getnext_entry(struct bpf_offloaded_map *offmap,
void *key, void *next_key)
{
- return nfp_bpf_ctrl_entry_op(offmap, CMSG_TYPE_MAP_GETNEXT,
+ return nfp_bpf_ctrl_entry_op(offmap, NFP_CCM_TYPE_BPF_MAP_GETNEXT,
key, NULL, 0, next_key, NULL);
}
@@ -456,54 +277,35 @@ unsigned int nfp_bpf_ctrl_cmsg_mtu(struct nfp_app_bpf *bpf)
void nfp_bpf_ctrl_msg_rx(struct nfp_app *app, struct sk_buff *skb)
{
struct nfp_app_bpf *bpf = app->priv;
- unsigned int tag;
if (unlikely(skb->len < sizeof(struct cmsg_reply_map_simple))) {
cmsg_warn(bpf, "cmsg drop - too short %d!\n", skb->len);
- goto err_free;
+ dev_kfree_skb_any(skb);
+ return;
}
- if (nfp_bpf_cmsg_get_type(skb) == CMSG_TYPE_BPF_EVENT) {
+ if (nfp_ccm_get_type(skb) == NFP_CCM_TYPE_BPF_BPF_EVENT) {
if (!nfp_bpf_event_output(bpf, skb->data, skb->len))
dev_consume_skb_any(skb);
else
dev_kfree_skb_any(skb);
- return;
}
- nfp_ctrl_lock(bpf->app->ctrl);
-
- tag = nfp_bpf_cmsg_get_tag(skb);
- if (unlikely(!test_bit(tag, bpf->tag_allocator))) {
- cmsg_warn(bpf, "cmsg drop - no one is waiting for tag %u!\n",
- tag);
- goto err_unlock;
- }
-
- __skb_queue_tail(&bpf->cmsg_replies, skb);
- wake_up_interruptible_all(&bpf->cmsg_wq);
-
- nfp_ctrl_unlock(bpf->app->ctrl);
-
- return;
-err_unlock:
- nfp_ctrl_unlock(bpf->app->ctrl);
-err_free:
- dev_kfree_skb_any(skb);
+ nfp_ccm_rx(&bpf->ccm, skb);
}
void
nfp_bpf_ctrl_msg_rx_raw(struct nfp_app *app, const void *data, unsigned int len)
{
+ const struct nfp_ccm_hdr *hdr = data;
struct nfp_app_bpf *bpf = app->priv;
- const struct cmsg_hdr *hdr = data;
if (unlikely(len < sizeof(struct cmsg_reply_map_simple))) {
cmsg_warn(bpf, "cmsg drop - too short %d!\n", len);
return;
}
- if (hdr->type == CMSG_TYPE_BPF_EVENT)
+ if (hdr->type == NFP_CCM_TYPE_BPF_BPF_EVENT)
nfp_bpf_event_output(bpf, data, len);
else
cmsg_warn(bpf, "cmsg drop - msg type %d with raw buffer!\n",
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