From: Gilad Ben-Yossef Subject: [PATCH 07/10] staging: ccree: turn compile time debug log to params Date: Thu, 14 Dec 2017 14:02:44 +0000 Message-ID: <1513260170-26346-8-git-send-email-gilad@benyossef.com> References: <1513260170-26346-1-git-send-email-gilad@benyossef.com> Cc: Ofir Drang , linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, driverdev-devel@linuxdriverproject.org, devel@driverdev.osuosl.org To: Greg Kroah-Hartman Return-path: Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70]:42210 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752547AbdLNODf (ORCPT ); Thu, 14 Dec 2017 09:03:35 -0500 In-Reply-To: <1513260170-26346-1-git-send-email-gilad@benyossef.com> Sender: linux-crypto-owner@vger.kernel.org List-ID: The ccree driver has some support to dump runtime data to kernel log to assist in debugging. The code used to be enabled by a build time flag. Refactor to enable it via module/kernel parameters. Signed-off-by: Gilad Ben-Yossef --- drivers/staging/ccree/ssi_config.h | 2 -- drivers/staging/ccree/ssi_driver.c | 18 ++++++++++++------ drivers/staging/ccree/ssi_driver.h | 16 ++++++++++------ drivers/staging/ccree/ssi_request_mgr.c | 26 +++++++++++++------------- 4 files changed, 35 insertions(+), 27 deletions(-) diff --git a/drivers/staging/ccree/ssi_config.h b/drivers/staging/ccree/ssi_config.h index b530974..bc90ad0 100644 --- a/drivers/staging/ccree/ssi_config.h +++ b/drivers/staging/ccree/ssi_config.h @@ -23,8 +23,6 @@ #include -//#define CC_DUMP_DESCS -// #define CC_DUMP_BYTES /* was 32 bit, but for juno's sake it was enlarged to 48 bit */ #define DMA_BIT_MASK_LEN 48 diff --git a/drivers/staging/ccree/ssi_driver.c b/drivers/staging/ccree/ssi_driver.c index dbca241..195fb27 100644 --- a/drivers/staging/ccree/ssi_driver.c +++ b/drivers/staging/ccree/ssi_driver.c @@ -72,20 +72,26 @@ #include "ssi_pm.h" #include "ssi_fips.h" -#ifdef CC_DUMP_BYTES -void dump_byte_array(const char *name, const u8 *buf, size_t len) +bool cc_dump_desc; +module_param_named(dump_desc, cc_dump_desc, bool, 0600); +MODULE_PARM_DESC(cc_dump_desc, "Dump descriptors to kernel log as debugging aid"); + +bool cc_dump_bytes; +module_param_named(dump_bytes, cc_dump_bytes, bool, 0600); +MODULE_PARM_DESC(cc_dump_bytes, "Dump buffers to kernel log as debugging aid"); + +void __dump_byte_array(const char *name, const u8 *buf, size_t len) { - char prefix[NAME_LEN]; + char prefix[64]; if (!buf) return; snprintf(prefix, sizeof(prefix), "%s[%lu]: ", name, len); - print_hex_dump(KERN_DEBUG, prefix, DUMP_PREFIX_ADDRESS, 16, 1, len, - false); + print_hex_dump(KERN_DEBUG, prefix, DUMP_PREFIX_ADDRESS, 16, 1, buf, + len, false); } -#endif static irqreturn_t cc_isr(int irq, void *dev_id) { diff --git a/drivers/staging/ccree/ssi_driver.h b/drivers/staging/ccree/ssi_driver.h index 4e05386..12e2a8b 100644 --- a/drivers/staging/ccree/ssi_driver.h +++ b/drivers/staging/ccree/ssi_driver.h @@ -48,6 +48,9 @@ #include "cc_hw_queue_defs.h" #include "ssi_sram_mgr.h" +extern bool cc_dump_desc; +extern bool cc_dump_bytes; + #define DRV_MODULE_VERSION "3.0" #define CC_DEV_NAME_STR "cc715ree" @@ -169,13 +172,14 @@ static inline struct device *drvdata_to_dev(struct cc_drvdata *drvdata) return &drvdata->plat_dev->dev; } -#ifdef CC_DUMP_BYTES -void dump_byte_array(const char *name, const u8 *the_array, - unsigned long size); -#else +void __dump_byte_array(const char *name, const u8 *the_array, + unsigned long size); static inline void dump_byte_array(const char *name, const u8 *the_array, - unsigned long size) {}; -#endif + unsigned long size) +{ + if (cc_dump_bytes) + __dump_byte_array(name, the_array, size); +} int init_cc_regs(struct cc_drvdata *drvdata, bool is_probe); void fini_cc_regs(struct cc_drvdata *drvdata); diff --git a/drivers/staging/ccree/ssi_request_mgr.c b/drivers/staging/ccree/ssi_request_mgr.c index f6374b0..2aa21f8 100644 --- a/drivers/staging/ccree/ssi_request_mgr.c +++ b/drivers/staging/ccree/ssi_request_mgr.c @@ -161,11 +161,12 @@ int cc_req_mgr_init(struct cc_drvdata *drvdata) return rc; } -static void enqueue_seq(void __iomem *cc_base, struct cc_hw_desc seq[], +static void enqueue_seq(struct cc_drvdata *drvdata, struct cc_hw_desc seq[], unsigned int seq_len) { int i, w; - void * __iomem reg = cc_base + CC_REG(DSCRPTR_QUEUE_WORD0); + void * __iomem reg = drvdata->cc_base + CC_REG(DSCRPTR_QUEUE_WORD0); + struct device *dev = drvdata_to_dev(drvdata); /* * We do indeed write all 6 command words to the same @@ -175,11 +176,12 @@ static void enqueue_seq(void __iomem *cc_base, struct cc_hw_desc seq[], for (i = 0; i < seq_len; i++) { for (w = 0; w <= 5; w++) writel_relaxed(seq[i].word[w], reg); -#ifdef CC_DUMP_DESCS - dev_dbg(dev, "desc[%02d]: 0x%08X 0x%08X 0x%08X 0x%08X 0x%08X 0x%08X\n", - i, seq[i].word[0], seq[i].word[1], seq[i].word[2], - seq[i].word[3], seq[i].word[4], seq[i].word[5]); -#endif + + if (cc_dump_desc) + dev_dbg(dev, "desc[%02d]: 0x%08X 0x%08X 0x%08X 0x%08X 0x%08X 0x%08X\n", + i, seq[i].word[0], seq[i].word[1], + seq[i].word[2], seq[i].word[3], + seq[i].word[4], seq[i].word[5]); } } @@ -256,7 +258,6 @@ static int cc_queues_status(struct cc_drvdata *drvdata, int send_request(struct cc_drvdata *drvdata, struct cc_crypto_req *cc_req, struct cc_hw_desc *desc, unsigned int len, bool is_dout) { - void __iomem *cc_base = drvdata->cc_base; struct cc_req_mgr_handle *req_mgr_h = drvdata->request_mgr_handle; unsigned int used_sw_slots; unsigned int iv_seq_len = 0; @@ -364,9 +365,9 @@ int send_request(struct cc_drvdata *drvdata, struct cc_crypto_req *cc_req, wmb(); /* STAT_PHASE_4: Push sequence */ - enqueue_seq(cc_base, iv_seq, iv_seq_len); - enqueue_seq(cc_base, desc, len); - enqueue_seq(cc_base, &req_mgr_h->compl_desc, (is_dout ? 0 : 1)); + enqueue_seq(drvdata, iv_seq, iv_seq_len); + enqueue_seq(drvdata, desc, len); + enqueue_seq(drvdata, &req_mgr_h->compl_desc, (is_dout ? 0 : 1)); if (req_mgr_h->q_free_slots < total_seq_len) { /* This situation should never occur. Maybe indicating problem @@ -407,7 +408,6 @@ int send_request(struct cc_drvdata *drvdata, struct cc_crypto_req *cc_req, int send_request_init(struct cc_drvdata *drvdata, struct cc_hw_desc *desc, unsigned int len) { - void __iomem *cc_base = drvdata->cc_base; struct cc_req_mgr_handle *req_mgr_h = drvdata->request_mgr_handle; unsigned int total_seq_len = len; /*initial sequence length*/ int rc = 0; @@ -426,7 +426,7 @@ int send_request_init(struct cc_drvdata *drvdata, struct cc_hw_desc *desc, * to make sure there are no outstnading memory writes */ wmb(); - enqueue_seq(cc_base, desc, len); + enqueue_seq(drvdata, desc, len); /* Update the free slots in HW queue */ req_mgr_h->q_free_slots = -- 2.7.4