diff options
Diffstat (limited to 'drivers/platform/surface/aggregator/ssh_packet_layer.c')
| -rw-r--r-- | drivers/platform/surface/aggregator/ssh_packet_layer.c | 47 |
1 files changed, 38 insertions, 9 deletions
diff --git a/drivers/platform/surface/aggregator/ssh_packet_layer.c b/drivers/platform/surface/aggregator/ssh_packet_layer.c index 66e38fdc7963..23c2e31e7d0e 100644 --- a/drivers/platform/surface/aggregator/ssh_packet_layer.c +++ b/drivers/platform/surface/aggregator/ssh_packet_layer.c @@ -303,24 +303,53 @@ void ssh_packet_init(struct ssh_packet *packet, unsigned long type, packet->ops = ops; } +static struct kmem_cache *ssh_ctrl_packet_cache; + +/** + * ssh_ctrl_packet_cache_init() - Initialize the control packet cache. + */ +int ssh_ctrl_packet_cache_init(void) +{ + const unsigned int size = sizeof(struct ssh_packet) + SSH_MSG_LEN_CTRL; + const unsigned int align = __alignof__(struct ssh_packet); + struct kmem_cache *cache; + + cache = kmem_cache_create("ssam_ctrl_packet", size, align, 0, NULL); + if (!cache) + return -ENOMEM; + + ssh_ctrl_packet_cache = cache; + return 0; +} + +/** + * ssh_ctrl_packet_cache_destroy() - Deinitialize the control packet cache. + */ +void ssh_ctrl_packet_cache_destroy(void) +{ + kmem_cache_destroy(ssh_ctrl_packet_cache); + ssh_ctrl_packet_cache = NULL; +} + /** - * ssh_ctrl_packet_alloc() - Allocate control packet. + * ssh_ctrl_packet_alloc() - Allocate packet from control packet cache. * @packet: Where the pointer to the newly allocated packet should be stored. * @buffer: The buffer corresponding to this packet. * @flags: Flags used for allocation. * - * Allocates a packet and corresponding transport buffer. Sets the packet's - * buffer reference to the allocated buffer. The packet must be freed via - * ssh_ctrl_packet_free(), which will also free the corresponding buffer. The - * corresponding buffer must not be freed separately. Intended to be used with - * %ssh_ptl_ctrl_packet_ops as packet operations. + * Allocates a packet and corresponding transport buffer from the control + * packet cache. Sets the packet's buffer reference to the allocated buffer. + * The packet must be freed via ssh_ctrl_packet_free(), which will also free + * the corresponding buffer. The corresponding buffer must not be freed + * separately. Intended to be used with %ssh_ptl_ctrl_packet_ops as packet + * operations. * * Return: Returns zero on success, %-ENOMEM if the allocation failed. */ static int ssh_ctrl_packet_alloc(struct ssh_packet **packet, struct ssam_span *buffer, gfp_t flags) { - *packet = kzalloc(sizeof(**packet) + SSH_MSG_LEN_CTRL, flags); + *packet = kmem_cache_alloc(ssh_ctrl_packet_cache, flags); if (!*packet) return -ENOMEM; @@ -331,12 +360,12 @@ static int ssh_ctrl_packet_alloc(struct ssh_packet **packet, } /** - * ssh_ctrl_packet_free() - Free control packet. + * ssh_ctrl_packet_free() - Free packet allocated from control packet cache. * @p: The packet to free. */ static void ssh_ctrl_packet_free(struct ssh_packet *p) { - kfree(p); + kmem_cache_free(ssh_ctrl_packet_cache, p); } static const struct ssh_packet_ops ssh_ptl_ctrl_packet_ops = { |