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gpu: host1x: Handle CDMA wraparound when debug printing

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During channel debug information dump, when printing CDMA
opcodes, the circular nature of the CDMA pushbuffer wasn't being
taken into account, sometimes accessing past the end. Change
the printing to take this into account.

Bug 4398831
Bug 4386806

Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Change-Id: I3a24da2c310e9414882f7cabbbda5158b6da00a2
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3034409
Reviewed-by: Rongrong Zhou <rongrongz@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
This commit is contained in:
Mikko Perttunen
2023-12-13 06:04:02 +02:00
committed by mobile promotions
parent 8103bafdc3
commit 0be6f60c9e
1 changed files with 10 additions and 3 deletions
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13
drivers/gpu/host1x/hw/debug_hw.c
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@@ -177,7 +177,14 @@ static void show_gather(struct output *o, dma_addr_t phys_addr,
for (i = 0; i < words; i++) {
dma_addr_t addr = phys_addr + i * 4;
u32 val = *(map_addr + offset / 4 + i);
u32 voffset = offset + i * 4;
u32 val;
/* If we reach the RESTART opcode, continue at the beginning of pushbuffer */
if (cdma && voffset >= cdma->push_buffer.size)
voffset -= cdma->push_buffer.size;
val = *(map_addr + voffset / 4);
if (!data_count) {
host1x_debug_output(o, " %pad: %08x: ", &addr, val);
@@ -203,7 +210,7 @@ static void show_channel_gathers(struct output *o, struct host1x_cdma *cdma)
job->num_slots, job->num_unpins);
show_gather(o, pb->dma + job->first_get, job->num_slots * 2, cdma,
pb->dma + job->first_get, pb->mapped + job->first_get);
pb->dma, pb->mapped);
for (i = 0; i < job->num_cmds; i++) {
struct host1x_job_gather *g;
@@ -227,7 +234,7 @@ static void show_channel_gathers(struct output *o, struct host1x_cdma *cdma)
host1x_debug_output(o, " GATHER at %pad+%#x, %d words\n",
&g->base, g->offset, g->words);
show_gather(o, g->base + g->offset, g->words, cdma,
show_gather(o, g->base + g->offset, g->words, NULL,
g->base, mapped);
if (!job->gather_copy_mapped)