mmc: host: Use request queue pointer for mmc crypto

To use block crypto based inline encryption mechanism
storage device driver should create a keyslot manager
and register it with device request queue. To achieve this
pass request queue pointer during host controller initialization
where request queue can be updated with keyslot manager.

Change-Id: I71f0005a1ad8867b6210e92878b8c112d436688e
Signed-off-by: Pradeep P V K <ppvk@codeaurora.org>

drivers/mmc/core/queue.c

@@ -437,6 +437,9 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card,
 			/* hook for pm qos cmdq init */
 			if (card->host->cmdq_ops->init)
 				card->host->cmdq_ops->init(card->host);
+			if (host->cmdq_ops->cqe_crypto_update_queue)
+				host->cmdq_ops->cqe_crypto_update_queue(host,
+								mq->queue);
 			mq->thread = kthread_run(mmc_cmdq_thread, mq,
 						 "mmc-cmdqd/%d%s",
 						 host->index,

drivers/mmc/host/cmdq_hci.c

@@ -1277,6 +1277,12 @@ static int cmdq_late_init(struct mmc_host *mmc)
 	return 0;
 }
 
+static void cqhci_crypto_update_queue(struct mmc_host *mmc,
+					struct request_queue *queue)
+{
+	//struct cqhci_host *cq_host = mmc->cqe_private;
+}
+
 static const struct mmc_cmdq_host_ops cmdq_host_ops = {
 	.init = cmdq_late_init,
 	.enable = cmdq_enable,
@@ -1286,6 +1292,7 @@ static const struct mmc_cmdq_host_ops cmdq_host_ops = {
 	.halt = cmdq_halt,
 	.reset	= cmdq_reset,
 	.dumpstate = cmdq_dumpstate,
+	.cqe_crypto_update_queue = cqhci_crypto_update_queue,
 };
 
 struct cmdq_host *cmdq_pltfm_init(struct platform_device *pdev)

include/linux/mmc/host.h

@@ -122,6 +122,13 @@ struct mmc_cmdq_host_ops {
 	int (*halt)(struct mmc_host *host, bool halt);
 	void (*reset)(struct mmc_host *host, bool soft);
 	void (*dumpstate)(struct mmc_host *host);
+	/*
+	 * Update the request queue with keyslot manager details. This keyslot
+	 * manager will be used by block crypto to configure the crypto Engine
+	 * for data encryption.
+	 */
+	void (*cqe_crypto_update_queue)(struct mmc_host *host,
+					struct request_queue *queue);
 };
 
 struct mmc_host_ops {