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scsi: ufs: ufs-qcom: Add support to dump testbus registers

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Add support to dump testbus registers to enhance debugging capabilities
for the Qualcomm UFS Host Controller.

Signed-off-by: Manish Pandey <quic_mapa@quicinc.com>
Link: https://lore.kernel.org/r/20250411121345.16859-4-quic_mapa@quicinc.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Manish Pandey
2025-04-11 17:43:45 +05:30
committed by Martin K. Petersen
parent 82edd86888
commit 25b5ee122b
1 changed files with 50 additions and 0 deletions
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50
drivers/ufs/host/ufs-qcom.c
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@@ -5,6 +5,7 @@
#include <linux/acpi.h>
#include <linux/clk.h>
#include <linux/cleanup.h>
#include <linux/delay.h>
#include <linux/devfreq.h>
#include <linux/gpio/consumer.h>
@@ -98,6 +99,24 @@ static const struct __ufs_qcom_bw_table {
[MODE_MAX][0][0] = { 7643136, 819200 },
};
static const struct {
int nminor;
char *prefix;
} testbus_info[TSTBUS_MAX] = {
[TSTBUS_UAWM] = {32, "TSTBUS_UAWM"},
[TSTBUS_UARM] = {32, "TSTBUS_UARM"},
[TSTBUS_TXUC] = {32, "TSTBUS_TXUC"},
[TSTBUS_RXUC] = {32, "TSTBUS_RXUC"},
[TSTBUS_DFC] = {32, "TSTBUS_DFC"},
[TSTBUS_TRLUT] = {32, "TSTBUS_TRLUT"},
[TSTBUS_TMRLUT] = {32, "TSTBUS_TMRLUT"},
[TSTBUS_OCSC] = {32, "TSTBUS_OCSC"},
[TSTBUS_UTP_HCI] = {32, "TSTBUS_UTP_HCI"},
[TSTBUS_COMBINED] = {32, "TSTBUS_COMBINED"},
[TSTBUS_WRAPPER] = {32, "TSTBUS_WRAPPER"},
[TSTBUS_UNIPRO] = {256, "TSTBUS_UNIPRO"},
};
static void ufs_qcom_get_default_testbus_cfg(struct ufs_qcom_host *host);
static int ufs_qcom_set_core_clk_ctrl(struct ufs_hba *hba, unsigned long freq);
@@ -1566,6 +1585,32 @@ int ufs_qcom_testbus_config(struct ufs_qcom_host *host)
return 0;
}
static void ufs_qcom_dump_testbus(struct ufs_hba *hba)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
int i, j, nminor = 0, testbus_len = 0;
u32 *testbus __free(kfree) = NULL;
char *prefix;
testbus = kmalloc_array(256, sizeof(u32), GFP_KERNEL);
if (!testbus)
return;
for (j = 0; j < TSTBUS_MAX; j++) {
nminor = testbus_info[j].nminor;
prefix = testbus_info[j].prefix;
host->testbus.select_major = j;
testbus_len = nminor * sizeof(u32);
for (i = 0; i < nminor; i++) {
host->testbus.select_minor = i;
ufs_qcom_testbus_config(host);
testbus[i] = ufshcd_readl(hba, UFS_TEST_BUS);
}
print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET,
16, 4, testbus, testbus_len, false);
}
}
static int ufs_qcom_dump_regs(struct ufs_hba *hba, size_t offset, size_t len,
const char *prefix, enum ufshcd_res id)
{
@@ -1688,6 +1733,11 @@ static void ufs_qcom_dump_dbg_regs(struct ufs_hba *hba)
/* Dump MCQ Host Vendor Specific Registers */
if (hba->mcq_enabled)
ufs_qcom_dump_mcq_hci_regs(hba);
/* voluntarily yield the CPU as we are dumping too much data */
ufshcd_dump_regs(hba, UFS_TEST_BUS, 4, "UFS_TEST_BUS ");
cond_resched();
ufs_qcom_dump_testbus(hba);
}
}