summaryrefslogtreecommitdiff
path: root/drivers/crypto/caam/ctrl.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/crypto/caam/ctrl.c')
-rw-r--r--drivers/crypto/caam/ctrl.c112
1 files changed, 78 insertions, 34 deletions
diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c
index 6278afb951c3..bedcc2ab3a00 100644
--- a/drivers/crypto/caam/ctrl.c
+++ b/drivers/crypto/caam/ctrl.c
@@ -3,7 +3,7 @@
* Controller-level driver, kernel property detection, initialization
*
* Copyright 2008-2012 Freescale Semiconductor, Inc.
- * Copyright 2018-2019 NXP
+ * Copyright 2018-2019, 2023 NXP
*/
#include <linux/device.h>
@@ -284,6 +284,10 @@ static int instantiate_rng(struct device *ctrldev, int state_handle_mask,
const u32 rdsta_if = RDSTA_IF0 << sh_idx;
const u32 rdsta_pr = RDSTA_PR0 << sh_idx;
const u32 rdsta_mask = rdsta_if | rdsta_pr;
+
+ /* Clear the contents before using the descriptor */
+ memset(desc, 0x00, CAAM_CMD_SZ * 7);
+
/*
* If the corresponding bit is set, this state handle
* was initialized by somebody else, so it's left alone.
@@ -327,8 +331,6 @@ static int instantiate_rng(struct device *ctrldev, int state_handle_mask,
}
dev_info(ctrldev, "Instantiated RNG4 SH%d\n", sh_idx);
- /* Clear the contents before recreating the descriptor */
- memset(desc, 0x00, CAAM_CMD_SZ * 7);
}
kfree(desc);
@@ -395,7 +397,7 @@ start_rng:
RTMCTL_SAMP_MODE_RAW_ES_SC);
}
-static int caam_get_era_from_hw(struct caam_ctrl __iomem *ctrl)
+static int caam_get_era_from_hw(struct caam_perfmon __iomem *perfmon)
{
static const struct {
u16 ip_id;
@@ -421,12 +423,12 @@ static int caam_get_era_from_hw(struct caam_ctrl __iomem *ctrl)
u16 ip_id;
int i;
- ccbvid = rd_reg32(&ctrl->perfmon.ccb_id);
+ ccbvid = rd_reg32(&perfmon->ccb_id);
era = (ccbvid & CCBVID_ERA_MASK) >> CCBVID_ERA_SHIFT;
if (era) /* This is '0' prior to CAAM ERA-6 */
return era;
- id_ms = rd_reg32(&ctrl->perfmon.caam_id_ms);
+ id_ms = rd_reg32(&perfmon->caam_id_ms);
ip_id = (id_ms & SECVID_MS_IPID_MASK) >> SECVID_MS_IPID_SHIFT;
maj_rev = (id_ms & SECVID_MS_MAJ_REV_MASK) >> SECVID_MS_MAJ_REV_SHIFT;
@@ -444,9 +446,9 @@ static int caam_get_era_from_hw(struct caam_ctrl __iomem *ctrl)
* In case this property is not passed an attempt to retrieve the CAAM
* era via register reads will be made.
*
- * @ctrl: controller region
+ * @perfmon: Performance Monitor Registers
*/
-static int caam_get_era(struct caam_ctrl __iomem *ctrl)
+static int caam_get_era(struct caam_perfmon __iomem *perfmon)
{
struct device_node *caam_node;
int ret;
@@ -459,7 +461,7 @@ static int caam_get_era(struct caam_ctrl __iomem *ctrl)
if (!ret)
return prop;
else
- return caam_get_era_from_hw(ctrl);
+ return caam_get_era_from_hw(perfmon);
}
/*
@@ -626,12 +628,14 @@ static int caam_probe(struct platform_device *pdev)
struct device_node *nprop, *np;
struct caam_ctrl __iomem *ctrl;
struct caam_drv_private *ctrlpriv;
+ struct caam_perfmon __iomem *perfmon;
struct dentry *dfs_root;
u32 scfgr, comp_params;
u8 rng_vid;
int pg_size;
int BLOCK_OFFSET = 0;
bool pr_support = false;
+ bool reg_access = true;
ctrlpriv = devm_kzalloc(&pdev->dev, sizeof(*ctrlpriv), GFP_KERNEL);
if (!ctrlpriv)
@@ -645,6 +649,17 @@ static int caam_probe(struct platform_device *pdev)
caam_imx = (bool)imx_soc_match;
if (imx_soc_match) {
+ /*
+ * Until Layerscape and i.MX OP-TEE get in sync,
+ * only i.MX OP-TEE use cases disallow access to
+ * caam page 0 (controller) registers.
+ */
+ np = of_find_compatible_node(NULL, NULL, "linaro,optee-tz");
+ ctrlpriv->optee_en = !!np;
+ of_node_put(np);
+
+ reg_access = !ctrlpriv->optee_en;
+
if (!imx_soc_match->data) {
dev_err(dev, "No clock data provided for i.MX SoC");
return -EINVAL;
@@ -665,10 +680,38 @@ static int caam_probe(struct platform_device *pdev)
return ret;
}
- caam_little_end = !(bool)(rd_reg32(&ctrl->perfmon.status) &
+ ring = 0;
+ for_each_available_child_of_node(nprop, np)
+ if (of_device_is_compatible(np, "fsl,sec-v4.0-job-ring") ||
+ of_device_is_compatible(np, "fsl,sec4.0-job-ring")) {
+ u32 reg;
+
+ if (of_property_read_u32_index(np, "reg", 0, &reg)) {
+ dev_err(dev, "%s read reg property error\n",
+ np->full_name);
+ continue;
+ }
+
+ ctrlpriv->jr[ring] = (struct caam_job_ring __iomem __force *)
+ ((__force uint8_t *)ctrl + reg);
+
+ ctrlpriv->total_jobrs++;
+ ring++;
+ }
+
+ /*
+ * Wherever possible, instead of accessing registers from the global page,
+ * use the alias registers in the first (cf. DT nodes order)
+ * job ring's page.
+ */
+ perfmon = ring ? (struct caam_perfmon __iomem *)&ctrlpriv->jr[0]->perfmon :
+ (struct caam_perfmon __iomem *)&ctrl->perfmon;
+
+ caam_little_end = !(bool)(rd_reg32(&perfmon->status) &
(CSTA_PLEND | CSTA_ALT_PLEND));
- comp_params = rd_reg32(&ctrl->perfmon.comp_parms_ms);
- if (comp_params & CTPR_MS_PS && rd_reg32(&ctrl->mcr) & MCFGR_LONG_PTR)
+ comp_params = rd_reg32(&perfmon->comp_parms_ms);
+ if (reg_access && comp_params & CTPR_MS_PS &&
+ rd_reg32(&ctrl->mcr) & MCFGR_LONG_PTR)
caam_ptr_sz = sizeof(u64);
else
caam_ptr_sz = sizeof(u32);
@@ -733,6 +776,9 @@ static int caam_probe(struct platform_device *pdev)
}
#endif
+ if (!reg_access)
+ goto set_dma_mask;
+
/*
* Enable DECO watchdogs and, if this is a PHYS_ADDR_T_64BIT kernel,
* long pointers in master configuration register.
@@ -772,13 +818,14 @@ static int caam_probe(struct platform_device *pdev)
JRSTART_JR1_START | JRSTART_JR2_START |
JRSTART_JR3_START);
+set_dma_mask:
ret = dma_set_mask_and_coherent(dev, caam_get_dma_mask(dev));
if (ret) {
dev_err(dev, "dma_set_mask_and_coherent failed (%d)\n", ret);
return ret;
}
- ctrlpriv->era = caam_get_era(ctrl);
+ ctrlpriv->era = caam_get_era(perfmon);
ctrlpriv->domain = iommu_get_domain_for_dev(dev);
dfs_root = debugfs_create_dir(dev_name(dev), NULL);
@@ -789,7 +836,7 @@ static int caam_probe(struct platform_device *pdev)
return ret;
}
- caam_debugfs_init(ctrlpriv, dfs_root);
+ caam_debugfs_init(ctrlpriv, perfmon, dfs_root);
/* Check to see if (DPAA 1.x) QI present. If so, enable */
if (ctrlpriv->qi_present && !caam_dpaa2) {
@@ -808,26 +855,16 @@ static int caam_probe(struct platform_device *pdev)
#endif
}
- ring = 0;
- for_each_available_child_of_node(nprop, np)
- if (of_device_is_compatible(np, "fsl,sec-v4.0-job-ring") ||
- of_device_is_compatible(np, "fsl,sec4.0-job-ring")) {
- ctrlpriv->jr[ring] = (struct caam_job_ring __iomem __force *)
- ((__force uint8_t *)ctrl +
- (ring + JR_BLOCK_NUMBER) *
- BLOCK_OFFSET
- );
- ctrlpriv->total_jobrs++;
- ring++;
- }
-
/* If no QI and no rings specified, quit and go home */
if ((!ctrlpriv->qi_present) && (!ctrlpriv->total_jobrs)) {
dev_err(dev, "no queues configured, terminating\n");
return -ENOMEM;
}
- comp_params = rd_reg32(&ctrl->perfmon.comp_parms_ls);
+ if (!reg_access)
+ goto report_live;
+
+ comp_params = rd_reg32(&perfmon->comp_parms_ls);
ctrlpriv->blob_present = !!(comp_params & CTPR_LS_BLOB);
/*
@@ -836,15 +873,21 @@ static int caam_probe(struct platform_device *pdev)
* check both here.
*/
if (ctrlpriv->era < 10) {
- rng_vid = (rd_reg32(&ctrl->perfmon.cha_id_ls) &
+ rng_vid = (rd_reg32(&perfmon->cha_id_ls) &
CHA_ID_LS_RNG_MASK) >> CHA_ID_LS_RNG_SHIFT;
ctrlpriv->blob_present = ctrlpriv->blob_present &&
- (rd_reg32(&ctrl->perfmon.cha_num_ls) & CHA_ID_LS_AES_MASK);
+ (rd_reg32(&perfmon->cha_num_ls) & CHA_ID_LS_AES_MASK);
} else {
- rng_vid = (rd_reg32(&ctrl->vreg.rng) & CHA_VER_VID_MASK) >>
+ struct version_regs __iomem *vreg;
+
+ vreg = ctrlpriv->total_jobrs ?
+ (struct version_regs __iomem *)&ctrlpriv->jr[0]->vreg :
+ (struct version_regs __iomem *)&ctrl->vreg;
+
+ rng_vid = (rd_reg32(&vreg->rng) & CHA_VER_VID_MASK) >>
CHA_VER_VID_SHIFT;
ctrlpriv->blob_present = ctrlpriv->blob_present &&
- (rd_reg32(&ctrl->vreg.aesa) & CHA_VER_MISC_AES_NUM_MASK);
+ (rd_reg32(&vreg->aesa) & CHA_VER_MISC_AES_NUM_MASK);
}
/*
@@ -923,10 +966,11 @@ static int caam_probe(struct platform_device *pdev)
clrsetbits_32(&ctrl->scfgr, 0, SCFGR_RDBENABLE);
}
+report_live:
/* NOTE: RTIC detection ought to go here, around Si time */
- caam_id = (u64)rd_reg32(&ctrl->perfmon.caam_id_ms) << 32 |
- (u64)rd_reg32(&ctrl->perfmon.caam_id_ls);
+ caam_id = (u64)rd_reg32(&perfmon->caam_id_ms) << 32 |
+ (u64)rd_reg32(&perfmon->caam_id_ls);
/* Report "alive" for developer to see */
dev_info(dev, "device ID = 0x%016llx (Era %d)\n", caam_id,
generated by cgit v1.2.3-70-g09d2 (git 2.47.1) at 2024-12-25 16:57:41 +0000