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Subject[PATCH 2/2] crypto: ccree - add custom cache params from DT file
Date
Add optinal ability to customize DMA transactions cache parameters and
ACE bus sharability properties and set new defaults.

Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
---
drivers/crypto/ccree/cc_driver.c | 89 ++++++++++++++++++++++++++------
drivers/crypto/ccree/cc_driver.h | 4 +-
drivers/crypto/ccree/cc_pm.c | 2 +-
3 files changed, 77 insertions(+), 18 deletions(-)

diff --git a/drivers/crypto/ccree/cc_driver.c b/drivers/crypto/ccree/cc_driver.c
index 6f519d3e896c..db497bc065d4 100644
--- a/drivers/crypto/ccree/cc_driver.c
+++ b/drivers/crypto/ccree/cc_driver.c
@@ -100,6 +100,71 @@ static const struct of_device_id arm_ccree_dev_of_match[] = {
};
MODULE_DEVICE_TABLE(of, arm_ccree_dev_of_match);

+static void init_cc_dt_params(struct cc_drvdata *drvdata)
+{
+ struct device *dev = drvdata_to_dev(drvdata);
+ struct device_node *np = dev->of_node;
+ u32 cache_params, ace_const, val, mask;
+ int rc;
+
+ /* register CC_AXIM_CACHE_PARAMS */
+ cache_params = cc_ioread(drvdata, CC_REG(AXIM_CACHE_PARAMS));
+ dev_dbg(dev, "Cache params previous: 0x%08X\n", cache_params);
+
+ rc = of_property_read_u32(np, "awcache", &val);
+ if (rc)
+ val = (drvdata->coherent ? 0xb : 0x2);
+
+ mask = CC_GENMASK(CC_AXIM_CACHE_PARAMS_AWCACHE);
+ cache_params &= ~mask;
+ cache_params |= FIELD_PREP(mask, val);
+
+ /* write AWCACHE also to AWCACHE_LAST */
+ mask = CC_GENMASK(CC_AXIM_CACHE_PARAMS_AWCACHE_LAST);
+ cache_params &= ~mask;
+ cache_params |= FIELD_PREP(mask, val);
+
+ rc = of_property_read_u32(np, "arcache", &val);
+ if (rc)
+ val = (drvdata->coherent ? 0xb : 0x2);
+
+ mask = CC_GENMASK(CC_AXIM_CACHE_PARAMS_ARCACHE);
+ cache_params &= ~mask;
+ cache_params |= FIELD_PREP(mask, val);
+
+ drvdata->cache_params = cache_params;
+
+ dev_dbg(dev, "Cache params current: 0x%08X\n", cache_params);
+
+ if (drvdata->hw_rev <= CC_HW_REV_710)
+ return;
+
+ /* register CC_AXIM_ACE_CONST */
+ ace_const = cc_ioread(drvdata, CC_REG(AXIM_ACE_CONST));
+ dev_dbg(dev, "ACE-const previous: 0x%08X\n", ace_const);
+
+ rc = of_property_read_u32(np, "ardomain", &val);
+ ace_const = cc_ioread(drvdata, CC_REG(AXIM_ACE_CONST));
+ if (rc)
+ val = (drvdata->coherent ? 0x2 : 0x3);
+
+ mask = CC_GENMASK(CC_AXIM_ACE_CONST_ARDOMAIN);
+ ace_const &= ~mask;
+ ace_const |= FIELD_PREP(mask, val);
+
+ rc = of_property_read_u32(np, "awdomain", &val);
+ if (rc)
+ val = (drvdata->coherent ? 0x2 : 0x3);
+
+ mask = CC_GENMASK(CC_AXIM_ACE_CONST_AWDOMAIN);
+ ace_const &= ~mask;
+ ace_const |= FIELD_PREP(mask, val);
+
+ dev_dbg(dev, "ACE-const current: 0x%08X\n", ace_const);
+
+ drvdata->ace_const = ace_const;
+}
+
static u32 cc_read_idr(struct cc_drvdata *drvdata, const u32 *idr_offsets)
{
int i;
@@ -218,9 +283,9 @@ bool cc_wait_for_reset_completion(struct cc_drvdata *drvdata)
return false;
}

-int init_cc_regs(struct cc_drvdata *drvdata, bool is_probe)
+int init_cc_regs(struct cc_drvdata *drvdata)
{
- unsigned int val, cache_params;
+ unsigned int val;
struct device *dev = drvdata_to_dev(drvdata);

/* Unmask all AXI interrupt sources AXI_CFG1 register */
@@ -245,19 +310,9 @@ int init_cc_regs(struct cc_drvdata *drvdata, bool is_probe)

cc_iowrite(drvdata, CC_REG(HOST_IMR), ~val);

- cache_params = (drvdata->coherent ? CC_COHERENT_CACHE_PARAMS : 0x0);
-
- val = cc_ioread(drvdata, CC_REG(AXIM_CACHE_PARAMS));
-
- if (is_probe)
- dev_dbg(dev, "Cache params previous: 0x%08X\n", val);
-
- cc_iowrite(drvdata, CC_REG(AXIM_CACHE_PARAMS), cache_params);
- val = cc_ioread(drvdata, CC_REG(AXIM_CACHE_PARAMS));
-
- if (is_probe)
- dev_dbg(dev, "Cache params current: 0x%08X (expect: 0x%08X)\n",
- val, cache_params);
+ cc_iowrite(drvdata, CC_REG(AXIM_CACHE_PARAMS), drvdata->cache_params);
+ if (drvdata->hw_rev >= CC_HW_REV_712)
+ cc_iowrite(drvdata, CC_REG(AXIM_ACE_CONST), drvdata->ace_const);

return 0;
}
@@ -445,7 +500,9 @@ static int init_cc_resources(struct platform_device *plat_dev)
}
dev_dbg(dev, "Registered to IRQ: %d\n", irq);

- rc = init_cc_regs(new_drvdata, true);
+ init_cc_dt_params(new_drvdata);
+
+ rc = init_cc_regs(new_drvdata);
if (rc) {
dev_err(dev, "init_cc_regs failed\n");
goto post_pm_err;
diff --git a/drivers/crypto/ccree/cc_driver.h b/drivers/crypto/ccree/cc_driver.h
index af77b2020350..cd5a51e8a281 100644
--- a/drivers/crypto/ccree/cc_driver.h
+++ b/drivers/crypto/ccree/cc_driver.h
@@ -155,6 +155,8 @@ struct cc_drvdata {
int std_bodies;
bool sec_disabled;
u32 comp_mask;
+ u32 cache_params;
+ u32 ace_const;
};

struct cc_crypto_alg {
@@ -205,7 +207,7 @@ static inline void dump_byte_array(const char *name, const u8 *the_array,
}

bool cc_wait_for_reset_completion(struct cc_drvdata *drvdata);
-int init_cc_regs(struct cc_drvdata *drvdata, bool is_probe);
+int init_cc_regs(struct cc_drvdata *drvdata);
void fini_cc_regs(struct cc_drvdata *drvdata);
unsigned int cc_get_default_hash_len(struct cc_drvdata *drvdata);

diff --git a/drivers/crypto/ccree/cc_pm.c b/drivers/crypto/ccree/cc_pm.c
index 3c65bf070c90..d5421b0c6831 100644
--- a/drivers/crypto/ccree/cc_pm.c
+++ b/drivers/crypto/ccree/cc_pm.c
@@ -45,7 +45,7 @@ static int cc_pm_resume(struct device *dev)
}

cc_iowrite(drvdata, CC_REG(HOST_POWER_DOWN_EN), POWER_DOWN_DISABLE);
- rc = init_cc_regs(drvdata, false);
+ rc = init_cc_regs(drvdata);
if (rc) {
dev_err(dev, "init_cc_regs (%x)\n", rc);
return rc;
--
2.27.0
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