xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

sfc: Implement asynchronous MCDI requests

Browse Source 
This will allow use of MCDI from the data path, in particular for
accelerated RFS.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
This commit is contained in:
Ben Hutchings
2013-08-27 23:12:31 +01:00
parent 251111d9a1
commit cade715ff1
3 changed files with 291 additions and 30 deletions
Download Patch File Download Diff File Expand all files Collapse all files

29
drivers/net/ethernet/sfc/mcdi.h
View File

@@ -14,15 +14,17 @@
* enum efx_mcdi_state - MCDI request handling state
* @MCDI_STATE_QUIESCENT: No pending MCDI requests. If the caller holds the
* mcdi @iface_lock then they are able to move to %MCDI_STATE_RUNNING
* @MCDI_STATE_RUNNING: There is an MCDI request pending. Only the thread that
* moved into this state is allowed to move out of it.
* @MCDI_STATE_RUNNING_SYNC: There is a synchronous MCDI request pending.
* Only the thread that moved into this state is allowed to move out of it.
* @MCDI_STATE_RUNNING_ASYNC: There is an asynchronous MCDI request pending.
* @MCDI_STATE_COMPLETED: An MCDI request has completed, but the owning thread
* has not yet consumed the result. For all other threads, equivalent to
* %MCDI_STATE_RUNNING.
*/
enum efx_mcdi_state {
MCDI_STATE_QUIESCENT,
MCDI_STATE_RUNNING,
MCDI_STATE_RUNNING_SYNC,
MCDI_STATE_RUNNING_ASYNC,
MCDI_STATE_COMPLETED,
};
@@ -33,19 +35,25 @@ enum efx_mcdi_mode {
/**
* struct efx_mcdi_iface - MCDI protocol context
* @efx: The associated NIC.
* @state: Request handling state. Waited for by @wq.
* @mode: Poll for mcdi completion, or wait for an mcdi_event.
* @wq: Wait queue for threads waiting for @state != %MCDI_STATE_RUNNING
* @new_epoch: Indicates start of day or start of MC reboot recovery
* @iface_lock: Serialises access to all the following fields
* @iface_lock: Serialises access to @seqno, @credits and response metadata
* @seqno: The next sequence number to use for mcdi requests.
* @credits: Number of spurious MCDI completion events allowed before we
* trigger a fatal error
* @resprc: Response error/success code (Linux numbering)
* @resp_hdr_len: Response header length
* @resp_data_len: Response data (SDU or error) length
* @async_lock: Serialises access to @async_list while event processing is
* enabled
* @async_list: Queue of asynchronous requests
* @async_timer: Timer for asynchronous request timeout
*/
struct efx_mcdi_iface {
struct efx_nic *efx;
enum efx_mcdi_state state;
enum efx_mcdi_mode mode;
wait_queue_head_t wq;
@@ -56,6 +64,9 @@ struct efx_mcdi_iface {
int resprc;
size_t resp_hdr_len;
size_t resp_data_len;
spinlock_t async_lock;
struct list_head async_list;
struct timer_list async_timer;
};
struct efx_mcdi_mon {
@@ -111,10 +122,20 @@ extern int efx_mcdi_rpc_finish(struct efx_nic *efx, unsigned cmd, size_t inlen,
efx_dword_t *outbuf, size_t outlen,
size_t *outlen_actual);
typedef void efx_mcdi_async_completer(struct efx_nic *efx,
unsigned long cookie, int rc,
efx_dword_t *outbuf,
size_t outlen_actual);
extern int efx_mcdi_rpc_async(struct efx_nic *efx, unsigned int cmd,
const efx_dword_t *inbuf, size_t inlen,
size_t outlen,
efx_mcdi_async_completer *complete,
unsigned long cookie);
extern int efx_mcdi_poll_reboot(struct efx_nic *efx);
extern void efx_mcdi_mode_poll(struct efx_nic *efx);
extern void efx_mcdi_mode_event(struct efx_nic *efx);
extern void efx_mcdi_flush_async(struct efx_nic *efx);
extern void efx_mcdi_process_event(struct efx_channel *channel,
efx_qword_t *event);