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