[PATCH v3 3/6] remoteproc: qcom: q6v5-pil: Refactor mba load/unload sequence

Sibi Sankar
2018-07-27T15:20:00Z

Refactor re-useable parts of mba load/unload sequence into mba_load and
mba_reclaim respectively and introduce mba_load flag. This is done in
order to prevent code duplication for modem coredump which requires the
mba to be loaded.

Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
---
drivers/remoteproc/qcom_q6v5_pil.c | 243 +++++++++++++++++------------
1 file changed, 144 insertions(+), 99 deletions(-)

diff --git a/drivers/remoteproc/qcom_q6v5_pil.c b/drivers/remoteproc/qcom_q6v5_pil.c
index d7a4b9eca5d2..eacf9f0bf49e 100644
--- a/drivers/remoteproc/qcom_q6v5_pil.c
+++ b/drivers/remoteproc/qcom_q6v5_pil.c
@@ -165,6 +165,7 @@ struct q6v5 {
int proxy_reg_count;

bool running;
+ bool mba_loaded;

phys_addr_t mba_phys;
void *mba_region;
@@ -669,6 +670,145 @@ static bool q6v5_phdr_valid(const struct elf32_phdr *phdr)
return true;
}

+static int q6v5_mba_load(struct q6v5 *qproc)
+{
+ int ret;
+ int xfermemop_ret;
+
+ ret = q6v5_regulator_enable(qproc, qproc->proxy_regs,
+ qproc->proxy_reg_count);
+ if (ret) {
+ dev_err(qproc->dev, "failed to enable proxy supplies\n");
+ return ret;
+ }
+
+ ret = q6v5_clk_enable(qproc->dev, qproc->proxy_clks,
+ qproc->proxy_clk_count);
+ if (ret) {
+ dev_err(qproc->dev, "failed to enable proxy clocks\n");
+ goto disable_proxy_reg;
+ }
+
+ ret = q6v5_regulator_enable(qproc, qproc->active_regs,
+ qproc->active_reg_count);
+ if (ret) {
+ dev_err(qproc->dev, "failed to enable supplies\n");
+ goto disable_proxy_clk;
+ }
+
+ ret = q6v5_clk_enable(qproc->dev, qproc->reset_clks,
+ qproc->reset_clk_count);
+ if (ret) {
+ dev_err(qproc->dev, "failed to enable reset clocks\n");
+ goto disable_vdd;
+ }
+
+ ret = q6v5_reset_deassert(qproc);
+ if (ret) {
+ dev_err(qproc->dev, "failed to deassert mss restart\n");
+ goto disable_reset_clks;
+ }
+
+ ret = q6v5_clk_enable(qproc->dev, qproc->active_clks,
+ qproc->active_clk_count);
+ if (ret) {
+ dev_err(qproc->dev, "failed to enable clocks\n");
+ goto assert_reset;
+ }
+
+ /* Assign MBA image access in DDR to q6 */
+ ret = q6v5_xfer_mem_ownership(qproc, &qproc->mba_perm, true,
+ qproc->mba_phys, qproc->mba_size);
+ if (ret) {
+ dev_err(qproc->dev,
+ "assigning Q6 access to mba memory failed: %d\n", ret);
+ goto disable_active_clks;
+ }
+
+ writel(qproc->mba_phys, qproc->rmb_base + RMB_MBA_IMAGE_REG);
+
+ ret = q6v5proc_reset(qproc);
+ if (ret)
+ goto reclaim_mba;
+
+ ret = q6v5_rmb_mba_wait(qproc, 0, 5000);
+ if (ret == -ETIMEDOUT) {
+ dev_err(qproc->dev, "MBA boot timed out\n");
+ goto halt_axi_ports;
+ } else if (ret != RMB_MBA_XPU_UNLOCKED &&
+ ret != RMB_MBA_XPU_UNLOCKED_SCRIBBLED) {
+ dev_err(qproc->dev, "MBA returned unexpected status %d\n", ret);
+ ret = -EINVAL;
+ goto halt_axi_ports;
+ }
+
+ qproc->mba_loaded = true;
+ return 0;
+
+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);
+
+reclaim_mba:
+ xfermemop_ret = q6v5_xfer_mem_ownership(qproc, &qproc->mba_perm, false,
+ qproc->mba_phys,
+ qproc->mba_size);
+ if (xfermemop_ret) {
+ dev_err(qproc->dev,
+ "Failed to reclaim mba buffer, system may become unstable\n");
+ }
+
+disable_active_clks:
+ q6v5_clk_disable(qproc->dev, qproc->active_clks,
+ qproc->active_clk_count);
+assert_reset:
+ q6v5_reset_assert(qproc);
+disable_reset_clks:
+ q6v5_clk_disable(qproc->dev, qproc->reset_clks,
+ qproc->reset_clk_count);
+disable_vdd:
+ q6v5_regulator_disable(qproc, qproc->active_regs,
+ qproc->active_reg_count);
+disable_proxy_clk:
+ q6v5_clk_disable(qproc->dev, qproc->proxy_clks,
+ qproc->proxy_clk_count);
+disable_proxy_reg:
+ q6v5_regulator_disable(qproc, qproc->proxy_regs,
+ qproc->proxy_reg_count);
+
+ return ret;
+}
+
+static void q6v5_mba_reclaim(struct q6v5 *qproc)
+{
+ int xfermemop_ret;
+
+ qproc->mba_loaded = false;
+ 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);
+ xfermemop_ret = q6v5_xfer_mem_ownership(qproc, &qproc->mba_perm, false,
+ qproc->mba_phys,
+ qproc->mba_size);
+ if (xfermemop_ret) {
+ dev_err(qproc->dev,
+ "Failed to reclaim mba buffer, system may become unstable\n");
+ }
+
+ q6v5_clk_disable(qproc->dev, qproc->active_clks,
+ qproc->active_clk_count);
+ q6v5_reset_assert(qproc);
+ q6v5_clk_disable(qproc->dev, qproc->reset_clks,
+ qproc->reset_clk_count);
+ q6v5_regulator_disable(qproc, qproc->active_regs,
+ qproc->active_reg_count);
+ q6v5_clk_disable(qproc->dev, qproc->proxy_clks,
+ qproc->proxy_clk_count);
+ q6v5_regulator_disable(qproc, qproc->proxy_regs,
+ qproc->proxy_reg_count);
+}
+
static int q6v5_mpss_load(struct q6v5 *qproc)
{
const struct elf32_phdr *phdrs;
@@ -792,72 +932,9 @@ static int q6v5_start(struct rproc *rproc)

qcom_q6v5_prepare(&qproc->q6v5);

- ret = q6v5_regulator_enable(qproc, qproc->proxy_regs,
- qproc->proxy_reg_count);
- if (ret) {
- dev_err(qproc->dev, "failed to enable proxy supplies\n");
- goto disable_irqs;
- }
-
- ret = q6v5_clk_enable(qproc->dev, qproc->proxy_clks,
- qproc->proxy_clk_count);
- if (ret) {
- dev_err(qproc->dev, "failed to enable proxy clocks\n");
- goto disable_proxy_reg;
- }
-
- ret = q6v5_regulator_enable(qproc, qproc->active_regs,
- qproc->active_reg_count);
- if (ret) {
- dev_err(qproc->dev, "failed to enable supplies\n");
- goto disable_proxy_clk;
- }
-
- ret = q6v5_clk_enable(qproc->dev, qproc->reset_clks,
- qproc->reset_clk_count);
- if (ret) {
- dev_err(qproc->dev, "failed to enable reset clocks\n");
- goto disable_vdd;
- }
-
- ret = q6v5_reset_deassert(qproc);
- if (ret) {
- dev_err(qproc->dev, "failed to deassert mss restart\n");
- goto disable_reset_clks;
- }
-
- ret = q6v5_clk_enable(qproc->dev, qproc->active_clks,
- qproc->active_clk_count);
- if (ret) {
- dev_err(qproc->dev, "failed to enable clocks\n");
- goto assert_reset;
- }
-
- /* Assign MBA image access in DDR to q6 */
- ret = q6v5_xfer_mem_ownership(qproc, &qproc->mba_perm, true,
- qproc->mba_phys, qproc->mba_size);
- if (ret) {
- dev_err(qproc->dev,
- "assigning Q6 access to mba memory failed: %d\n", ret);
- goto disable_active_clks;
- }
-
- writel(qproc->mba_phys, qproc->rmb_base + RMB_MBA_IMAGE_REG);
-
- ret = q6v5proc_reset(qproc);
+ ret = q6v5_mba_load(qproc);
if (ret)
- goto reclaim_mba;
-
- ret = q6v5_rmb_mba_wait(qproc, 0, 5000);
- if (ret == -ETIMEDOUT) {
- dev_err(qproc->dev, "MBA boot timed out\n");
- goto halt_axi_ports;
- } else if (ret != RMB_MBA_XPU_UNLOCKED &&
- ret != RMB_MBA_XPU_UNLOCKED_SCRIBBLED) {
- dev_err(qproc->dev, "MBA returned unexpected status %d\n", ret);
- ret = -EINVAL;
- goto halt_axi_ports;
- }
+ goto disable_irqs;

dev_info(qproc->dev, "MBA booted, loading mpss\n");

@@ -886,40 +963,7 @@ static int q6v5_start(struct rproc *rproc)
false, qproc->mpss_phys,
qproc->mpss_size);
WARN_ON(xfermemop_ret);
-
-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);
-
-reclaim_mba:
- xfermemop_ret = q6v5_xfer_mem_ownership(qproc, &qproc->mba_perm, false,
- qproc->mba_phys,
- qproc->mba_size);
- if (xfermemop_ret) {
- dev_err(qproc->dev,
- "Failed to reclaim mba buffer, system may become unstable\n");
- }
-
-disable_active_clks:
- q6v5_clk_disable(qproc->dev, qproc->active_clks,
- qproc->active_clk_count);
-
-assert_reset:
- q6v5_reset_assert(qproc);
-disable_reset_clks:
- q6v5_clk_disable(qproc->dev, qproc->reset_clks,
- qproc->reset_clk_count);
-disable_vdd:
- q6v5_regulator_disable(qproc, qproc->active_regs,
- qproc->active_reg_count);
-disable_proxy_clk:
- q6v5_clk_disable(qproc->dev, qproc->proxy_clks,
- qproc->proxy_clk_count);
-disable_proxy_reg:
- q6v5_regulator_disable(qproc, qproc->proxy_regs,
- qproc->proxy_reg_count);
-
+ q6v5_mba_reclaim(qproc);
disable_irqs:
qcom_q6v5_unprepare(&qproc->q6v5);

@@ -933,6 +977,7 @@ static int q6v5_stop(struct rproc *rproc)
u32 val;

qproc->running = false;
+ qproc->mba_loaded = false;

ret = qcom_q6v5_request_stop(&qproc->q6v5);
if (ret == -ETIMEDOUT)
--
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