MC_CMD_GET_PARSER_DISP_INFO_OUT_SUPPORTED_MATCHES_MAXNUM * 2];
unsigned int rx_match_count;
+ struct rw_semaphore lock; /* Protects entries */
struct {
unsigned long spec; /* pointer to spec plus flag bits */
-/* BUSY flag indicates that an update is in progress. AUTO_OLD is
- * used to mark and sweep MAC filters for the device address lists.
- */
-#define EFX_EF10_FILTER_FLAG_BUSY 1UL
+/* AUTO_OLD is used to mark and sweep MAC filters for the device address lists. */
+/* unused flag 1UL */
#define EFX_EF10_FILTER_FLAG_AUTO_OLD 2UL
#define EFX_EF10_FILTER_FLAGS 3UL
u64 handle; /* firmware handle */
} *entry;
- wait_queue_head_t waitq;
/* Shadow of net_device address lists, guarded by mac_lock */
struct efx_ef10_dev_addr dev_uc_list[EFX_EF10_FILTER_DEV_UC_MAX];
struct efx_ef10_dev_addr dev_mc_list[EFX_EF10_FILTER_DEV_MC_MAX];
struct efx_filter_spec *spec,
bool replace_equal)
{
- struct efx_ef10_filter_table *table = efx->filter_state;
DECLARE_BITMAP(mc_rem_map, EFX_EF10_FILTER_SEARCH_LIMIT);
+ struct efx_ef10_filter_table *table;
struct efx_filter_spec *saved_spec;
struct efx_rss_context *ctx = NULL;
unsigned int match_pri, hash;
unsigned int priv_flags;
bool replacing = false;
+ unsigned int depth, i;
int ins_index = -1;
DEFINE_WAIT(wait);
bool is_mc_recip;
s32 rc;
+ down_read(&efx->filter_sem);
+ table = efx->filter_state;
+ down_write(&table->lock);
+
/* For now, only support RX filters */
if ((spec->flags & (EFX_FILTER_FLAG_RX | EFX_FILTER_FLAG_TX)) !=
- EFX_FILTER_FLAG_RX)
- return -EINVAL;
+ EFX_FILTER_FLAG_RX) {
+ rc = -EINVAL;
+ goto out_unlock;
+ }
rc = efx_ef10_filter_pri(table, spec);
if (rc < 0)
- return rc;
+ goto out_unlock;
match_pri = rc;
hash = efx_ef10_filter_hash(spec);
&efx->rss_context.list);
else
ctx = &efx->rss_context;
- if (!ctx)
- return -ENOENT;
- if (ctx->context_id == EFX_EF10_RSS_CONTEXT_INVALID)
- return -EOPNOTSUPP;
+ if (!ctx) {
+ rc = -ENOENT;
+ goto out_unlock;
+ }
+ if (ctx->context_id == EFX_EF10_RSS_CONTEXT_INVALID) {
+ rc = -EOPNOTSUPP;
+ goto out_unlock;
+ }
}
/* Find any existing filters with the same match tuple or
- * else a free slot to insert at. If any of them are busy,
- * we have to wait and retry.
+ * else a free slot to insert at.
*/
- for (;;) {
- unsigned int depth = 1;
- unsigned int i;
-
- spin_lock_bh(&efx->filter_lock);
+ for (depth = 1; depth < EFX_EF10_FILTER_SEARCH_LIMIT; depth++) {
+ i = (hash + depth) & (HUNT_FILTER_TBL_ROWS - 1);
+ saved_spec = efx_ef10_filter_entry_spec(table, i);
- for (;;) {
- i = (hash + depth) & (HUNT_FILTER_TBL_ROWS - 1);
- saved_spec = efx_ef10_filter_entry_spec(table, i);
-
- if (!saved_spec) {
- if (ins_index < 0)
- ins_index = i;
- } else if (efx_ef10_filter_equal(spec, saved_spec)) {
- if (table->entry[i].spec &
- EFX_EF10_FILTER_FLAG_BUSY)
- break;
- if (spec->priority < saved_spec->priority &&
- spec->priority != EFX_FILTER_PRI_AUTO) {
- rc = -EPERM;
- goto out_unlock;
- }
- if (!is_mc_recip) {
- /* This is the only one */
- if (spec->priority ==
- saved_spec->priority &&
- !replace_equal) {
- rc = -EEXIST;
- goto out_unlock;
- }
- ins_index = i;
- goto found;
- } else if (spec->priority >
- saved_spec->priority ||
- (spec->priority ==
- saved_spec->priority &&
- replace_equal)) {
- if (ins_index < 0)
- ins_index = i;
- else
- __set_bit(depth, mc_rem_map);
- }
+ if (!saved_spec) {
+ if (ins_index < 0)
+ ins_index = i;
+ } else if (efx_ef10_filter_equal(spec, saved_spec)) {
+ if (spec->priority < saved_spec->priority &&
+ spec->priority != EFX_FILTER_PRI_AUTO) {
+ rc = -EPERM;
+ goto out_unlock;
}
-
- /* Once we reach the maximum search depth, use
- * the first suitable slot or return -EBUSY if
- * there was none
- */
- if (depth == EFX_EF10_FILTER_SEARCH_LIMIT) {
- if (ins_index < 0) {
- rc = -EBUSY;
+ if (!is_mc_recip) {
+ /* This is the only one */
+ if (spec->priority ==
+ saved_spec->priority &&
+ !replace_equal) {
+ rc = -EEXIST;
goto out_unlock;
}
- goto found;
+ ins_index = i;
+ break;
+ } else if (spec->priority >
+ saved_spec->priority ||
+ (spec->priority ==
+ saved_spec->priority &&
+ replace_equal)) {
+ if (ins_index < 0)
+ ins_index = i;
+ else
+ __set_bit(depth, mc_rem_map);
}
-
- ++depth;
}
-
- prepare_to_wait(&table->waitq, &wait, TASK_UNINTERRUPTIBLE);
- spin_unlock_bh(&efx->filter_lock);
- schedule();
}
-found:
- /* Create a software table entry if necessary, and mark it
- * busy. We might yet fail to insert, but any attempt to
- * insert a conflicting filter while we're waiting for the
- * firmware must find the busy entry.
+ /* Once we reach the maximum search depth, use the first suitable
+ * slot, or return -EBUSY if there was none
*/
+ if (ins_index < 0) {
+ rc = -EBUSY;
+ goto out_unlock;
+ }
+
+ /* Create a software table entry if necessary. */
saved_spec = efx_ef10_filter_entry_spec(table, ins_index);
if (saved_spec) {
if (spec->priority == EFX_FILTER_PRI_AUTO &&
*saved_spec = *spec;
priv_flags = 0;
}
- efx_ef10_filter_set_entry(table, ins_index, saved_spec,
- priv_flags | EFX_EF10_FILTER_FLAG_BUSY);
-
- /* Mark lower-priority multicast recipients busy prior to removal */
- if (is_mc_recip) {
- unsigned int depth, i;
-
- for (depth = 0; depth < EFX_EF10_FILTER_SEARCH_LIMIT; depth++) {
- i = (hash + depth) & (HUNT_FILTER_TBL_ROWS - 1);
- if (test_bit(depth, mc_rem_map))
- table->entry[i].spec |=
- EFX_EF10_FILTER_FLAG_BUSY;
- }
- }
-
- spin_unlock_bh(&efx->filter_lock);
+ efx_ef10_filter_set_entry(table, ins_index, saved_spec, priv_flags);
+ /* Actually insert the filter on the HW */
rc = efx_ef10_filter_push(efx, spec, &table->entry[ins_index].handle,
ctx, replacing);
/* Finalise the software table entry */
- spin_lock_bh(&efx->filter_lock);
if (rc == 0) {
if (replacing) {
/* Update the fields that may differ */
} else if (!replacing) {
kfree(saved_spec);
saved_spec = NULL;
+ } else {
+ /* We failed to replace, so the old filter is still present.
+ * Roll back the software table to reflect this. In fact the
+ * efx_ef10_filter_set_entry() call below will do the right
+ * thing, so nothing extra is needed here.
+ */
}
efx_ef10_filter_set_entry(table, ins_index, saved_spec, priv_flags);
priv_flags = efx_ef10_filter_entry_flags(table, i);
if (rc == 0) {
- spin_unlock_bh(&efx->filter_lock);
MCDI_SET_DWORD(inbuf, FILTER_OP_IN_OP,
MC_CMD_FILTER_OP_IN_OP_UNSUBSCRIBE);
MCDI_SET_QWORD(inbuf, FILTER_OP_IN_HANDLE,
rc = efx_mcdi_rpc(efx, MC_CMD_FILTER_OP,
inbuf, sizeof(inbuf),
NULL, 0, NULL);
- spin_lock_bh(&efx->filter_lock);
}
if (rc == 0) {
kfree(saved_spec);
saved_spec = NULL;
priv_flags = 0;
- } else {
- priv_flags &= ~EFX_EF10_FILTER_FLAG_BUSY;
}
efx_ef10_filter_set_entry(table, i, saved_spec,
priv_flags);
if (rc == 0)
rc = efx_ef10_make_filter_id(match_pri, ins_index);
- wake_up_all(&table->waitq);
out_unlock:
- spin_unlock_bh(&efx->filter_lock);
- finish_wait(&table->waitq, &wait);
+ up_write(&table->lock);
+ up_read(&efx->filter_sem);
return rc;
}
* If !by_index, remove by ID
* If by_index, remove by index
* Filter ID may come from userland and must be range-checked.
+ * Caller must hold efx->filter_sem for read, and efx->filter_state->lock
+ * for write.
*/
static int efx_ef10_filter_remove_internal(struct efx_nic *efx,
unsigned int priority_mask,
DEFINE_WAIT(wait);
int rc;
- /* Find the software table entry and mark it busy. Don't
- * remove it yet; any attempt to update while we're waiting
- * for the firmware must find the busy entry.
- */
- for (;;) {
- spin_lock_bh(&efx->filter_lock);
- if (!(table->entry[filter_idx].spec &
- EFX_EF10_FILTER_FLAG_BUSY))
- break;
- prepare_to_wait(&table->waitq, &wait, TASK_UNINTERRUPTIBLE);
- spin_unlock_bh(&efx->filter_lock);
- schedule();
- }
-
spec = efx_ef10_filter_entry_spec(table, filter_idx);
if (!spec ||
(!by_index &&
efx_ef10_filter_pri(table, spec) !=
- efx_ef10_filter_get_unsafe_pri(filter_id))) {
- rc = -ENOENT;
- goto out_unlock;
- }
+ efx_ef10_filter_get_unsafe_pri(filter_id)))
+ return -ENOENT;
if (spec->flags & EFX_FILTER_FLAG_RX_OVER_AUTO &&
priority_mask == (1U << EFX_FILTER_PRI_AUTO)) {
/* Just remove flags */
spec->flags &= ~EFX_FILTER_FLAG_RX_OVER_AUTO;
table->entry[filter_idx].spec &= ~EFX_EF10_FILTER_FLAG_AUTO_OLD;
- rc = 0;
- goto out_unlock;
- }
-
- if (!(priority_mask & (1U << spec->priority))) {
- rc = -ENOENT;
- goto out_unlock;
+ return 0;
}
- table->entry[filter_idx].spec |= EFX_EF10_FILTER_FLAG_BUSY;
- spin_unlock_bh(&efx->filter_lock);
+ if (!(priority_mask & (1U << spec->priority)))
+ return -ENOENT;
if (spec->flags & EFX_FILTER_FLAG_RX_OVER_AUTO) {
/* Reset to an automatic filter */
&efx->rss_context,
true);
- spin_lock_bh(&efx->filter_lock);
if (rc == 0)
*spec = new_spec;
} else {
rc = efx_mcdi_rpc_quiet(efx, MC_CMD_FILTER_OP,
inbuf, sizeof(inbuf), NULL, 0, NULL);
- spin_lock_bh(&efx->filter_lock);
if ((rc == 0) || (rc == -ENOENT)) {
/* Filter removed OK or didn't actually exist */
kfree(spec);
}
}
- table->entry[filter_idx].spec &= ~EFX_EF10_FILTER_FLAG_BUSY;
- wake_up_all(&table->waitq);
-out_unlock:
- spin_unlock_bh(&efx->filter_lock);
- finish_wait(&table->waitq, &wait);
return rc;
}
enum efx_filter_priority priority,
u32 filter_id)
{
- return efx_ef10_filter_remove_internal(efx, 1U << priority,
- filter_id, false);
+ struct efx_ef10_filter_table *table;
+ int rc;
+
+ down_read(&efx->filter_sem);
+ table = efx->filter_state;
+ down_write(&table->lock);
+ rc = efx_ef10_filter_remove_internal(efx, 1U << priority, filter_id,
+ false);
+ up_write(&table->lock);
+ up_read(&efx->filter_sem);
+ return rc;
}
+/* Caller must hold efx->filter_sem for read */
static void efx_ef10_filter_remove_unsafe(struct efx_nic *efx,
enum efx_filter_priority priority,
u32 filter_id)
{
+ struct efx_ef10_filter_table *table = efx->filter_state;
+
if (filter_id == EFX_EF10_FILTER_ID_INVALID)
return;
- efx_ef10_filter_remove_internal(efx, 1U << priority, filter_id, true);
+
+ down_write(&table->lock);
+ efx_ef10_filter_remove_internal(efx, 1U << priority, filter_id,
+ true);
+ up_write(&table->lock);
}
static int efx_ef10_filter_get_safe(struct efx_nic *efx,
u32 filter_id, struct efx_filter_spec *spec)
{
unsigned int filter_idx = efx_ef10_filter_get_unsafe_id(filter_id);
- struct efx_ef10_filter_table *table = efx->filter_state;
const struct efx_filter_spec *saved_spec;
+ struct efx_ef10_filter_table *table;
int rc;
- spin_lock_bh(&efx->filter_lock);
+ down_read(&efx->filter_sem);
+ table = efx->filter_state;
+ down_read(&table->lock);
saved_spec = efx_ef10_filter_entry_spec(table, filter_idx);
if (saved_spec && saved_spec->priority == priority &&
efx_ef10_filter_pri(table, saved_spec) ==
} else {
rc = -ENOENT;
}
- spin_unlock_bh(&efx->filter_lock);
+ up_read(&table->lock);
+ up_read(&efx->filter_sem);
return rc;
}
static int efx_ef10_filter_clear_rx(struct efx_nic *efx,
- enum efx_filter_priority priority)
+ enum efx_filter_priority priority)
{
+ struct efx_ef10_filter_table *table;
unsigned int priority_mask;
unsigned int i;
int rc;
priority_mask = (((1U << (priority + 1)) - 1) &
~(1U << EFX_FILTER_PRI_AUTO));
+ down_read(&efx->filter_sem);
+ table = efx->filter_state;
+ down_write(&table->lock);
for (i = 0; i < HUNT_FILTER_TBL_ROWS; i++) {
rc = efx_ef10_filter_remove_internal(efx, priority_mask,
i, true);
if (rc && rc != -ENOENT)
- return rc;
+ break;
+ rc = 0;
}
- return 0;
+ up_write(&table->lock);
+ up_read(&efx->filter_sem);
+ return rc;
}
static u32 efx_ef10_filter_count_rx_used(struct efx_nic *efx,
enum efx_filter_priority priority)
{
- struct efx_ef10_filter_table *table = efx->filter_state;
+ struct efx_ef10_filter_table *table;
unsigned int filter_idx;
s32 count = 0;
- spin_lock_bh(&efx->filter_lock);
+ down_read(&efx->filter_sem);
+ table = efx->filter_state;
+ down_read(&table->lock);
for (filter_idx = 0; filter_idx < HUNT_FILTER_TBL_ROWS; filter_idx++) {
if (table->entry[filter_idx].spec &&
efx_ef10_filter_entry_spec(table, filter_idx)->priority ==
priority)
++count;
}
- spin_unlock_bh(&efx->filter_lock);
+ up_read(&table->lock);
+ up_read(&efx->filter_sem);
return count;
}
enum efx_filter_priority priority,
u32 *buf, u32 size)
{
- struct efx_ef10_filter_table *table = efx->filter_state;
+ struct efx_ef10_filter_table *table;
struct efx_filter_spec *spec;
unsigned int filter_idx;
s32 count = 0;
- spin_lock_bh(&efx->filter_lock);
+ down_read(&efx->filter_sem);
+ table = efx->filter_state;
+ down_read(&table->lock);
+
for (filter_idx = 0; filter_idx < HUNT_FILTER_TBL_ROWS; filter_idx++) {
spec = efx_ef10_filter_entry_spec(table, filter_idx);
if (spec && spec->priority == priority) {
filter_idx);
}
}
- spin_unlock_bh(&efx->filter_lock);
+ up_read(&table->lock);
+ up_read(&efx->filter_sem);
return count;
}
#ifdef CONFIG_RFS_ACCEL
-static void
-efx_ef10_filter_rfs_expire_complete(struct efx_nic *efx,
- unsigned long filter_idx,
- int rc, efx_dword_t *outbuf,
- size_t outlen_actual);
-
static bool efx_ef10_filter_rfs_expire_one(struct efx_nic *efx, u32 flow_id,
unsigned int filter_idx)
{
- struct efx_ef10_filter_table *table = efx->filter_state;
+ struct efx_ef10_filter_table *table;
struct efx_filter_spec *spec;
- MCDI_DECLARE_BUF(inbuf,
- MC_CMD_FILTER_OP_IN_HANDLE_OFST +
- MC_CMD_FILTER_OP_IN_HANDLE_LEN);
- bool ret = true;
+ bool ret;
- spin_lock_bh(&efx->filter_lock);
+ down_read(&efx->filter_sem);
+ table = efx->filter_state;
+ down_write(&table->lock);
spec = efx_ef10_filter_entry_spec(table, filter_idx);
- if (!spec ||
- (table->entry[filter_idx].spec & EFX_EF10_FILTER_FLAG_BUSY) ||
- spec->priority != EFX_FILTER_PRI_HINT ||
- !rps_may_expire_flow(efx->net_dev, spec->dmaq_id,
+
+ if (!spec || spec->priority != EFX_FILTER_PRI_HINT) {
+ ret = true;
+ goto out_unlock;
+ }
+
+ if (!rps_may_expire_flow(efx->net_dev, spec->dmaq_id,
flow_id, filter_idx)) {
ret = false;
goto out_unlock;
}
- MCDI_SET_DWORD(inbuf, FILTER_OP_IN_OP,
- MC_CMD_FILTER_OP_IN_OP_REMOVE);
- MCDI_SET_QWORD(inbuf, FILTER_OP_IN_HANDLE,
- table->entry[filter_idx].handle);
- if (efx_mcdi_rpc_async(efx, MC_CMD_FILTER_OP, inbuf, sizeof(inbuf), 0,
- efx_ef10_filter_rfs_expire_complete, filter_idx))
- ret = false;
- else
- table->entry[filter_idx].spec |= EFX_EF10_FILTER_FLAG_BUSY;
+ ret = efx_ef10_filter_remove_internal(efx, 1U << spec->priority,
+ filter_idx, true) == 0;
out_unlock:
- spin_unlock_bh(&efx->filter_lock);
+ up_write(&table->lock);
+ up_read(&efx->filter_sem);
return ret;
}
-static void
-efx_ef10_filter_rfs_expire_complete(struct efx_nic *efx,
- unsigned long filter_idx,
- int rc, efx_dword_t *outbuf,
- size_t outlen_actual)
-{
- struct efx_ef10_filter_table *table = efx->filter_state;
- struct efx_filter_spec *spec =
- efx_ef10_filter_entry_spec(table, filter_idx);
-
- spin_lock_bh(&efx->filter_lock);
- if (rc == 0) {
- kfree(spec);
- efx_ef10_filter_set_entry(table, filter_idx, NULL, 0);
- }
- table->entry[filter_idx].spec &= ~EFX_EF10_FILTER_FLAG_BUSY;
- wake_up_all(&table->waitq);
- spin_unlock_bh(&efx->filter_lock);
-}
-
#endif /* CONFIG_RFS_ACCEL */
static int efx_ef10_filter_match_flags_from_mcdi(bool encap, u32 mcdi_flags)
table->vlan_filter =
!!(efx->net_dev->features & NETIF_F_HW_VLAN_CTAG_FILTER);
INIT_LIST_HEAD(&table->vlan_list);
+ init_rwsem(&table->lock);
efx->filter_state = table;
- init_waitqueue_head(&table->waitq);
list_for_each_entry(vlan, &nic_data->vlan_list, list) {
rc = efx_ef10_filter_add_vlan(efx, vlan->vid);
if (!table)
return;
- spin_lock_bh(&efx->filter_lock);
+ down_write(&table->lock);
for (filter_idx = 0; filter_idx < HUNT_FILTER_TBL_ROWS; filter_idx++) {
spec = efx_ef10_filter_entry_spec(table, filter_idx);
}
}
- table->entry[filter_idx].spec |= EFX_EF10_FILTER_FLAG_BUSY;
- spin_unlock_bh(&efx->filter_lock);
-
rc = efx_ef10_filter_push(efx, spec,
&table->entry[filter_idx].handle,
ctx, false);
if (rc)
failed++;
- spin_lock_bh(&efx->filter_lock);
if (rc) {
not_restored:
kfree(spec);
efx_ef10_filter_set_entry(table, filter_idx, NULL, 0);
- } else {
- table->entry[filter_idx].spec &=
- ~EFX_EF10_FILTER_FLAG_BUSY;
}
}
- spin_unlock_bh(&efx->filter_lock);
+ up_write(&table->lock);
/* This can happen validly if the MC's capabilities have changed, so
* is not an error.
struct efx_ef10_filter_table *table = efx->filter_state;
unsigned int filter_idx;
+ efx_rwsem_assert_write_locked(&table->lock);
+
if (*id != EFX_EF10_FILTER_ID_INVALID) {
filter_idx = efx_ef10_filter_get_unsafe_id(*id);
if (!table->entry[filter_idx].spec)
struct efx_ef10_filter_table *table = efx->filter_state;
struct efx_ef10_filter_vlan *vlan;
- spin_lock_bh(&efx->filter_lock);
+ down_write(&table->lock);
list_for_each_entry(vlan, &table->vlan_list, list)
_efx_ef10_filter_vlan_mark_old(efx, vlan);
- spin_unlock_bh(&efx->filter_lock);
+ up_write(&table->lock);
}
static void efx_ef10_filter_uc_addr_list(struct efx_nic *efx)
return rc;
}
-/* Remove filters that weren't renewed. Since nothing else changes the AUTO_OLD
- * flag or removes these filters, we don't need to hold the filter_lock while
- * scanning for these filters.
- */
+/* Remove filters that weren't renewed. */
static void efx_ef10_filter_remove_old(struct efx_nic *efx)
{
struct efx_ef10_filter_table *table = efx->filter_state;
int rc;
int i;
+ down_write(&table->lock);
for (i = 0; i < HUNT_FILTER_TBL_ROWS; i++) {
if (READ_ONCE(table->entry[i].spec) &
EFX_EF10_FILTER_FLAG_AUTO_OLD) {
remove_failed++;
}
}
+ up_write(&table->lock);
if (remove_failed)
netif_info(efx, drv, efx->net_dev,
projects / linux-2.6-microblaze.git / commitdiff