apm821xx: backport and reassign crypto4xx patches

This patch backports several patches that went upstream into
Herbert Xu's cryptodev-2.6 tree:

crypto: Use zeroing memory allocator instead of allocator/memset
crypto: crypto4xx - performance optimizations
crypto: crypto4xx - convert to skcipher
crypto: crypto4xx - avoid VLA use
crypto: crypto4xx - add aes-ctr support
crypto: crypto4xx - properly set IV after de- and encrypt
crypto: crypto4xx - extend aead fallback checks
crypto: crypto4xx - put temporary dst sg into request ctx

The older, outstanding patches from 120-wxyz series have been
upstreamed as well and therefore they have been reassigned to
fit into the series.

Signed-off-by: Christian Lamparter <chunkeey@gmail.com>

1 files changed, 71 insertions, 0 deletions

diff --git a/target/linux/apm821xx/patches-4.14/021-0001-crypto-crypto4xx-shuffle-iomap-in-front-of-request_i.patch b/target/linux/apm821xx/patches-4.14/021-0001-crypto-crypto4xx-shuffle-iomap-in-front-of-request_i.patch
new file mode 100644
index 0000000000..fc8df38867
--- /dev/null
+++ b/target/linux/apm821xx/patches-4.14/021-0001-crypto-crypto4xx-shuffle-iomap-in-front-of-request_i.patch
@@ -0,0 +1,71 @@
+From 4baa099377d73ea99c7802a9685815b32e8bf119 Mon Sep 17 00:00:00 2001
+From: Christian Lamparter <chunkeey@gmail.com>
+Date: Thu, 21 Dec 2017 15:08:18 +0100
+Subject: [PATCH 1/6] crypto: crypto4xx - shuffle iomap in front of request_irq
+
+It is possible to avoid the ce_base null pointer check in the
+drivers' interrupt handler routine "crypto4xx_ce_interrupt_handler()"
+by simply doing the iomap in front of the IRQ registration.
+
+This way, the ce_base will always be valid in the handler and
+a branch in an critical path can be avoided.
+
+Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
+---
+ drivers/crypto/amcc/crypto4xx_core.c | 21 +++++++++------------
+ 1 file changed, 9 insertions(+), 12 deletions(-)
+
+--- a/drivers/crypto/amcc/crypto4xx_core.c
++++ b/drivers/crypto/amcc/crypto4xx_core.c
+@@ -1075,9 +1075,6 @@ static irqreturn_t crypto4xx_ce_interrup
+ 	struct device *dev = (struct device *)data;
+ 	struct crypto4xx_core_device *core_dev = dev_get_drvdata(dev);
+ 
+-	if (!core_dev->dev->ce_base)
+-		return 0;
+-
+ 	writel(PPC4XX_INTERRUPT_CLR,
+ 	       core_dev->dev->ce_base + CRYPTO4XX_INT_CLR);
+ 	tasklet_schedule(&core_dev->tasklet);
+@@ -1325,13 +1322,6 @@ static int crypto4xx_probe(struct platfo
+ 	tasklet_init(&core_dev->tasklet, crypto4xx_bh_tasklet_cb,
+ 		     (unsigned long) dev);
+ 
+-	/* Register for Crypto isr, Crypto Engine IRQ */
+-	core_dev->irq = irq_of_parse_and_map(ofdev->dev.of_node, 0);
+-	rc = request_irq(core_dev->irq, crypto4xx_ce_interrupt_handler, 0,
+-			 core_dev->dev->name, dev);
+-	if (rc)
+-		goto err_request_irq;
+-
+ 	core_dev->dev->ce_base = of_iomap(ofdev->dev.of_node, 0);
+ 	if (!core_dev->dev->ce_base) {
+ 		dev_err(dev, "failed to of_iomap\n");
+@@ -1339,6 +1329,13 @@ static int crypto4xx_probe(struct platfo
+ 		goto err_iomap;
+ 	}
+ 
++	/* Register for Crypto isr, Crypto Engine IRQ */
++	core_dev->irq = irq_of_parse_and_map(ofdev->dev.of_node, 0);
++	rc = request_irq(core_dev->irq, crypto4xx_ce_interrupt_handler, 0,
++			 core_dev->dev->name, dev);
++	if (rc)
++		goto err_request_irq;
++
+ 	/* need to setup pdr, rdr, gdr and sdr before this */
+ 	crypto4xx_hw_init(core_dev->dev);
+ 
+@@ -1352,11 +1349,11 @@ static int crypto4xx_probe(struct platfo
+ 	return 0;
+ 
+ err_start_dev:
+-	iounmap(core_dev->dev->ce_base);
+-err_iomap:
+ 	free_irq(core_dev->irq, dev);
+ err_request_irq:
+ 	irq_dispose_mapping(core_dev->irq);
++	iounmap(core_dev->dev->ce_base);
++err_iomap:
+ 	tasklet_kill(&core_dev->tasklet);
+ err_build_sdr:
+ 	crypto4xx_destroy_sdr(core_dev->dev);