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remoteproc: qcom_q6v5_mss: Add MBA log extraction support

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On SC7180 the MBA firmware stores the bootup text logs in a 4K segment
at the beginning of the MBA region. Add support to extract the logs
which will be useful to debug mba boot/authentication issues.

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
Link: https://lore.kernel.org/r/20200721112935.25716-3-sibis@codeaurora.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Sibi Sankar 2020-07-21 16:59:35 +05:30 committed by Bjorn Andersson
parent 3afdc59e43
commit 318130cc93
1 changed files with 37 additions and 1 deletions
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38
drivers/remoteproc/qcom_q6v5_mss.c
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@ -9,6 +9,7 @@
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/devcoredump.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
@ -36,6 +37,8 @@
#define MPSS_CRASH_REASON_SMEM 421
#define MBA_LOG_SIZE SZ_4K
/* RMB Status Register Values */
#define RMB_PBL_SUCCESS 0x1
@ -138,6 +141,7 @@ struct rproc_hexagon_res {
int version;
bool need_mem_protection;
bool has_alt_reset;
bool has_mba_logs;
bool has_spare_reg;
};
@ -198,6 +202,7 @@ struct q6v5 {
struct qcom_sysmon *sysmon;
bool need_mem_protection;
bool has_alt_reset;
bool has_mba_logs;
bool has_spare_reg;
int mpss_perm;
int mba_perm;
@ -509,6 +514,26 @@ static int q6v5_rmb_mba_wait(struct q6v5 *qproc, u32 status, int ms)
return val;
}
static void q6v5_dump_mba_logs(struct q6v5 *qproc)
{
struct rproc *rproc = qproc->rproc;
void *data;
if (!qproc->has_mba_logs)
return;
if (q6v5_xfer_mem_ownership(qproc, &qproc->mba_perm, true, false, qproc->mba_phys,
qproc->mba_size))
return;
data = vmalloc(MBA_LOG_SIZE);
if (!data)
return;
memcpy(data, qproc->mba_region, MBA_LOG_SIZE);
dev_coredumpv(&rproc->dev, data, MBA_LOG_SIZE, GFP_KERNEL);
}
static int q6v5proc_reset(struct q6v5 *qproc)
{
u32 val;
@ -829,6 +854,7 @@ static int q6v5_mba_load(struct q6v5 *qproc)
{
int ret;
int xfermemop_ret;
bool mba_load_err = false;
qcom_q6v5_prepare(&qproc->q6v5);
@ -918,7 +944,7 @@ halt_axi_ports:
q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_q6);
q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_modem);
q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_nc);
mba_load_err = true;
reclaim_mba:
xfermemop_ret = q6v5_xfer_mem_ownership(qproc, &qproc->mba_perm, true,
false, qproc->mba_phys,
@ -926,6 +952,8 @@ reclaim_mba:
if (xfermemop_ret) {
dev_err(qproc->dev,
"Failed to reclaim mba buffer, system may become unstable\n");
} else if (mba_load_err) {
q6v5_dump_mba_logs(qproc);
}
disable_active_clks:
@ -1283,6 +1311,7 @@ static int q6v5_start(struct rproc *rproc)
reclaim_mpss:
q6v5_mba_reclaim(qproc);
q6v5_dump_mba_logs(qproc);
return ret;
}
@ -1702,6 +1731,7 @@ static int q6v5_probe(struct platform_device *pdev)
qproc->version = desc->version;
qproc->need_mem_protection = desc->need_mem_protection;
qproc->has_mba_logs = desc->has_mba_logs;
ret = qcom_q6v5_init(&qproc->q6v5, pdev, rproc, MPSS_CRASH_REASON_SMEM,
qcom_msa_handover);
@ -1793,6 +1823,7 @@ static const struct rproc_hexagon_res sc7180_mss = {
},
.need_mem_protection = true,
.has_alt_reset = false,
.has_mba_logs = true,
.has_spare_reg = true,
.version = MSS_SC7180,
};
@ -1828,6 +1859,7 @@ static const struct rproc_hexagon_res sdm845_mss = {
},
.need_mem_protection = true,
.has_alt_reset = true,
.has_mba_logs = false,
.has_spare_reg = false,
.version = MSS_SDM845,
};
@ -1855,6 +1887,7 @@ static const struct rproc_hexagon_res msm8998_mss = {
},
.need_mem_protection = true,
.has_alt_reset = false,
.has_mba_logs = false,
.has_spare_reg = false,
.version = MSS_MSM8998,
};
@ -1885,6 +1918,7 @@ static const struct rproc_hexagon_res msm8996_mss = {
},
.need_mem_protection = true,
.has_alt_reset = false,
.has_mba_logs = false,
.has_spare_reg = false,
.version = MSS_MSM8996,
};
@ -1918,6 +1952,7 @@ static const struct rproc_hexagon_res msm8916_mss = {
},
.need_mem_protection = false,
.has_alt_reset = false,
.has_mba_logs = false,
.has_spare_reg = false,
.version = MSS_MSM8916,
};
@ -1959,6 +1994,7 @@ static const struct rproc_hexagon_res msm8974_mss = {
},
.need_mem_protection = false,
.has_alt_reset = false,
.has_mba_logs = false,
.has_spare_reg = false,
.version = MSS_MSM8974,
};