renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2025-01-16 01:24:08 +08:00
Code

liquidio: IQ synchronization

Browse Source 
This patch tries to protect against bh preemption with
sc_buf_pool. It also modifies the syncronization primitives
during input queue processing.

Signed-off-by: Derek Chickles <derek.chickles@caviumnetworks.com>
Signed-off-by: Satanand Burla <satananda.burla@caviumnetworks.com>
Signed-off-by: Felix Manlunas <felix.manlunas@caviumnetworks.com>
Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Raghu Vatsavayi 2016-07-03 13:56:49 -07:00 committed by David S. Miller
parent a7d5a3dcf7
commit 14866ccd8f
1 changed files with 16 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
drivers/net/ethernet/cavium/liquidio/request_manager.c
View File

@ -360,6 +360,7 @@ lio_process_iq_request_list(struct octeon_device *oct,
unsigned int pkts_compl = 0, bytes_compl = 0;
struct octeon_soft_command *sc;
struct octeon_instr_irh *irh;
unsigned long flags;
while (old != iq->octeon_read_index) {
reqtype = iq->request_list[old].reqtype;
@ -389,15 +390,19 @@ lio_process_iq_request_list(struct octeon_device *oct,
* command response list because we expect
* a response from Octeon.
*/
spin_lock_bh(&oct->response_list
[OCTEON_ORDERED_SC_LIST].lock);
spin_lock_irqsave
(&oct->response_list
[OCTEON_ORDERED_SC_LIST].lock,
flags);
atomic_inc(&oct->response_list
[OCTEON_ORDERED_SC_LIST].
pending_req_count);
list_add_tail(&sc->node, &oct->response_list
[OCTEON_ORDERED_SC_LIST].head);
spin_unlock_bh(&oct->response_list
[OCTEON_ORDERED_SC_LIST].lock);
spin_unlock_irqrestore
(&oct->response_list
[OCTEON_ORDERED_SC_LIST].lock,
flags);
} else {
if (sc->callback) {
sc->callback(oct, OCTEON_REQUEST_DONE,
@ -674,7 +679,7 @@ int octeon_free_sc_buffer_pool(struct octeon_device *oct)
struct list_head *tmp, *tmp2;
struct octeon_soft_command *sc;
spin_lock(&oct->sc_buf_pool.lock);
spin_lock_bh(&oct->sc_buf_pool.lock);
list_for_each_safe(tmp, tmp2, &oct->sc_buf_pool.head) {
list_del(tmp);
@ -686,7 +691,7 @@ int octeon_free_sc_buffer_pool(struct octeon_device *oct)
INIT_LIST_HEAD(&oct->sc_buf_pool.head);
spin_unlock(&oct->sc_buf_pool.lock);
spin_unlock_bh(&oct->sc_buf_pool.lock);
return 0;
}
@ -705,10 +710,10 @@ struct octeon_soft_command *octeon_alloc_soft_command(struct octeon_device *oct,
WARN_ON((offset + datasize + rdatasize + ctxsize) >
SOFT_COMMAND_BUFFER_SIZE);
spin_lock(&oct->sc_buf_pool.lock);
spin_lock_bh(&oct->sc_buf_pool.lock);
if (list_empty(&oct->sc_buf_pool.head)) {
spin_unlock(&oct->sc_buf_pool.lock);
spin_unlock_bh(&oct->sc_buf_pool.lock);
return NULL;
}
@ -719,7 +724,7 @@ struct octeon_soft_command *octeon_alloc_soft_command(struct octeon_device *oct,
atomic_inc(&oct->sc_buf_pool.alloc_buf_count);
spin_unlock(&oct->sc_buf_pool.lock);
spin_unlock_bh(&oct->sc_buf_pool.lock);
sc = (struct octeon_soft_command *)tmp;
@ -762,11 +767,11 @@ struct octeon_soft_command *octeon_alloc_soft_command(struct octeon_device *oct,
void octeon_free_soft_command(struct octeon_device *oct,
struct octeon_soft_command *sc)
{
spin_lock(&oct->sc_buf_pool.lock);
spin_lock_bh(&oct->sc_buf_pool.lock);
list_add_tail(&sc->node, &oct->sc_buf_pool.head);
atomic_dec(&oct->sc_buf_pool.alloc_buf_count);
spin_unlock(&oct->sc_buf_pool.lock);
spin_unlock_bh(&oct->sc_buf_pool.lock);
}