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disp: msm: sde: Add debug bus dump support for LUTDMA

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Add hooks to dump LUTDUMA debug bus status during dumping
of system debug status. LUTDMA debug bus can be accessed
from userspace via the "recovery_lutdma_dbgbus" debugfs node.
Output control of the LUTDMA_dbbus is managed by the
"reg_dma_dbgbus" node.

Change-Id: Iea011279dd3806f0f594102ce7a5dc018a8d2b7c
Signed-off-by: Christopher Braga <cbraga@codeaurora.org>
This commit is contained in:
Christopher Braga
2020-08-06 17:23:04 -04:00
rodzic c7464588de
commit 4a4e450b2c
1 zmienionych plików z 166 dodań i 0 usunięć
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166
msm/sde_dbg.c
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@@ -26,6 +26,7 @@
#define DEFAULT_DBGBUS_SDE SDE_DBG_DUMP_IN_MEM
#define DEFAULT_DBGBUS_VBIFRT SDE_DBG_DUMP_IN_MEM
#define DEFAULT_DBGBUS_DSI SDE_DBG_DUMP_IN_MEM
#define DEFAULT_DBGBUS_LUTDMA SDE_DBG_DUMP_IN_MEM
#define DEFAULT_BASE_REG_CNT DEFAULT_MDSS_HW_BLOCK_SIZE
#define GROUP_BYTES 4
#define ROW_BYTES 16
@@ -38,6 +39,11 @@
#define DBGBUS_NAME_SDE "sde"
#define DBGBUS_NAME_VBIF_RT "vbif_rt"
#define DBGBUS_NAME_DSI "dsi"
#define DBGBUS_NAME_LUTDMA "reg_dma"
/* offsets from LUTDMA top address for the debug buses */
#define DBGBUS_LUTDMA_0 0x1E8
#define DBGBUS_LUTDMA_1 0x5E8
/* offsets from sde top address for the debug buses */
#define DBGBUS_SSPP0 0x188
@@ -164,6 +170,12 @@ struct dsi_debug_bus_entry {
u32 sel;
};
struct lutdma_debug_bus_entry {
u32 wr_addr;
bool read_engine;
u32 indicies;
};
struct sde_dbg_dsi_ctrl_list_entry {
const char *name;
void __iomem *base;
@@ -197,6 +209,11 @@ struct sde_dbg_dsi_debug_bus {
struct dsi_debug_bus_entry *entries;
};
struct sde_dbg_lutdma_debug_bus {
struct sde_dbg_debug_bus_common cmn;
struct lutdma_debug_bus_entry *entries;
};
/**
* struct sde_dbg_regbuf - wraps buffer and tracking params for register dumps
* @buf: pointer to allocated memory for storing register dumps in hw recovery
@@ -228,6 +245,7 @@ struct sde_dbg_regbuf {
* @enable_reg_dump: whether to dump registers into memory, kernel log, or both
* @dbgbus_sde: debug bus structure for the sde
* @dbgbus_vbif_rt: debug bus structure for the realtime vbif
* @dbgbus_lutdma: debug bus structure for the lutdma hw
* @dump_all: dump all entries in register dump
* @dump_secure: dump entries excluding few as it is in secure-session
* @dsi_dbg_bus: dump dsi debug bus register
@@ -252,6 +270,7 @@ static struct sde_dbg_base {
struct sde_dbg_sde_debug_bus dbgbus_sde;
struct sde_dbg_vbif_debug_bus dbgbus_vbif_rt;
struct sde_dbg_dsi_debug_bus dbgbus_dsi;
struct sde_dbg_lutdma_debug_bus dbgbus_lutdma;
bool dump_all;
bool dump_secure;
u32 debugfs_ctrl;
@@ -4291,6 +4310,13 @@ static struct dsi_debug_bus_entry dsi_dbg_bus_kona[] = {
{0, 0x3c}, {0, 0x3d}, {0, 0x3e}, {0, 0x3f},
};
static struct lutdma_debug_bus_entry dbg_bus_lutdma_lahaina[] = {
{ DBGBUS_LUTDMA_0, false, 1024 },
{ DBGBUS_LUTDMA_0, true, 1024 },
{ DBGBUS_LUTDMA_1, false, 1024 },
{ DBGBUS_LUTDMA_1, true, 1024 },
};
/**
* _sde_power_check - check if power needs to enabled
* @dump_mode: to check if power need to be enabled
@@ -4960,6 +4986,103 @@ static void _sde_dbg_dump_dsi_dbg_bus(struct sde_dbg_dsi_debug_bus *bus)
bus->cmn.name);
}
static void _sde_dbg_dump_lutdma_dbg_bus(struct sde_dbg_lutdma_debug_bus *bus)
{
void __iomem *mem_base = NULL;
struct sde_dbg_reg_base *reg_base;
struct lutdma_debug_bus_entry *entries;
bool dump_in_log, dump_in_mem;
u32 **dump_mem = NULL;
u32 *dump_addr = NULL;
u32 i, j, entry_count, addr, count, val, engine_bit, dump_mem_size = 0;
int rc;
if (!bus || !bus->cmn.entries_size)
return;
list_for_each_entry(reg_base, &sde_dbg_base.reg_base_list,
reg_base_head) {
if (strlen(reg_base->name) &&
!strcmp(reg_base->name, bus->cmn.name))
mem_base = reg_base->base;
}
if (!mem_base) {
pr_err("unable to find mem_base for %s\n", bus->cmn.name);
return;
}
entries = bus->entries;
entry_count = bus->cmn.entries_size;
dump_in_log = (bus->cmn.enable_mask & SDE_DBG_DUMP_IN_LOG);
dump_in_mem = (bus->cmn.enable_mask & SDE_DBG_DUMP_IN_MEM);
dump_mem = &bus->cmn.dumped_content;
if (!dump_in_log && !dump_in_mem)
return;
rc = pm_runtime_get_sync(sde_dbg_base.dev);
if (rc < 0) {
pr_err("failed to enable power %d\n", rc);
return;
}
dev_info(sde_dbg_base.dev, "======== start %s dump =========\n",
bus->cmn.name);
if (dump_in_mem) {
if (*dump_mem == NULL) {
for (i = 0; i < entry_count; i++)
dump_mem_size += (entries[i].indicies *
sizeof(u32));
//Ensure enough chunks for debugfs dumping
dump_mem_size += dump_mem_size % (DUMP_CLMN_COUNT * 4);
*dump_mem = devm_kzalloc(sde_dbg_base.dev,
dump_mem_size, GFP_KERNEL);
bus->cmn.content_size = dump_mem_size / sizeof(u32);
}
if (*dump_mem) {
dump_addr = *dump_mem;
dev_info(sde_dbg_base.dev,
"%s: start_addr:0x%pK len:0x%x\n",
__func__, dump_addr, dump_mem_size);
} else {
dump_in_mem = false;
pr_err("dump_mem: allocation fails\n");
}
}
for (i = 0; i < entry_count; i++) {
addr = entries[i].wr_addr;
count = entries[i].indicies;
engine_bit = entries[i].read_engine ? BIT(14) : 0;
for (j = 0 ; j < count; j++) {
val = (BIT(0) | engine_bit | (j << 1)) & 0xFFFF;
writel_relaxed(val, mem_base + addr);
wmb(); /* Ensure dbgbus setup occurs before read */
val = readl_relaxed(mem_base + addr + 0x4);
if (dump_in_log)
dev_info(sde_dbg_base.dev,
"lutdma_waddr=0x%x index=0x%x val=0x%x\n",
addr, j, val);
if (dump_in_mem)
dump_addr[i * count + j] = val;
}
//Disable debug bus when done
writel_relaxed(0, mem_base + addr);
}
dev_info(sde_dbg_base.dev, "======== end %s dump =========\n",
bus->cmn.name);
}
/**
* _sde_dump_array - dump array of register bases
* @blk_arr: array of register base pointers
@@ -5004,6 +5127,9 @@ static void _sde_dump_array(struct sde_dbg_reg_base *blk_arr[],
if (dump_all || dump_dbgbus_dsi)
_sde_dbg_dump_dsi_dbg_bus(&sde_dbg_base.dbgbus_dsi);
if (dump_all || dump_dbgbus_sde)
_sde_dbg_dump_lutdma_dbg_bus(&sde_dbg_base.dbgbus_lutdma);
if (do_panic && sde_dbg_base.panic_on_err)
panic(name);
@@ -5651,6 +5777,29 @@ static const struct file_operations sde_recovery_dsi_dbgbus_fops = {
.read = sde_recovery_dbgbus_dump_read,
};
static int sde_recovery_lutdma_dbgbus_dump_open(struct inode *inode,
struct file *file)
{
if (!inode || !file)
return -EINVAL;
/* non-seekable */
file->f_mode &= ~(FMODE_LSEEK | FMODE_PREAD | FMODE_PWRITE);
file->private_data = (void *)&sde_dbg_base.dbgbus_lutdma.cmn;
mutex_lock(&sde_dbg_base.mutex);
sde_dbg_base.dbgbus_lutdma.cmn.content_idx = 0;
mutex_unlock(&sde_dbg_base.mutex);
return 0;
}
static const struct file_operations sde_recovery_lutdma_dbgbus_fops = {
.open = sde_recovery_lutdma_dbgbus_dump_open,
.read = sde_recovery_dbgbus_dump_read,
};
/**
* sde_dbg_reg_base_release - release allocated reg dump file private data
* @inode: debugfs inode
@@ -6075,6 +6224,16 @@ int sde_dbg_debugfs_register(struct device *dev)
&dbg->dbgbus_dsi.cmn.enable_mask);
}
if (dbg->dbgbus_lutdma.entries) {
debugfs_create_file("recovery_lutdma_dbgbus", 0400,
debugfs_root, NULL,
&sde_recovery_lutdma_dbgbus_fops);
snprintf(debug_name, sizeof(debug_name), "%s_dbgbus",
dbg->dbgbus_lutdma.cmn.name);
debugfs_create_u32(debug_name, 0600, debugfs_root,
&dbg->dbgbus_lutdma.cmn.enable_mask);
}
list_for_each_entry(blk_base, &dbg->reg_base_list, reg_base_head) {
snprintf(debug_name, sizeof(debug_name), "%s_off",
blk_base->name);
@@ -6120,6 +6279,13 @@ void sde_dbg_init_dbg_buses(u32 hwversion)
ARRAY_SIZE(dsi_dbg_bus_kona);
dbg->dbgbus_dsi.cmn.name = DBGBUS_NAME_DSI;
dbg->dbgbus_dsi.cmn.enable_mask = DEFAULT_DBGBUS_DSI;
dbg->dbgbus_lutdma.entries = dbg_bus_lutdma_lahaina;
dbg->dbgbus_lutdma.cmn.name = DBGBUS_NAME_LUTDMA;
dbg->dbgbus_lutdma.cmn.entries_size =
ARRAY_SIZE(dbg_bus_lutdma_lahaina);
dbg->dbgbus_lutdma.cmn.enable_mask = DEFAULT_DBGBUS_LUTDMA;
dbg->dbgbus_lutdma.cmn.include_in_deferred_work = true;
} else if (SDE_HW_REV_MAJOR(hwversion) == 0x6) {
dbg->dbgbus_sde.entries = dbg_bus_sde_kona;
dbg->dbgbus_sde.cmn.entries_size =