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path: root/drivers/misc/habanalabs/debugfs.c
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Diffstat (limited to 'drivers/misc/habanalabs/debugfs.c')
-rw-r--r--drivers/misc/habanalabs/debugfs.c159
1 files changed, 112 insertions, 47 deletions
diff --git a/drivers/misc/habanalabs/debugfs.c b/drivers/misc/habanalabs/debugfs.c
index 974a87789bd8..ba418aaa404c 100644
--- a/drivers/misc/habanalabs/debugfs.c
+++ b/drivers/misc/habanalabs/debugfs.c
@@ -459,41 +459,31 @@ static ssize_t mmu_write(struct file *file, const char __user *buf,
struct hl_debugfs_entry *entry = s->private;
struct hl_dbg_device_entry *dev_entry = entry->dev_entry;
struct hl_device *hdev = dev_entry->hdev;
- char kbuf[MMU_KBUF_SIZE], asid_kbuf[MMU_ASID_BUF_SIZE],
- addr_kbuf[MMU_ADDR_BUF_SIZE];
+ char kbuf[MMU_KBUF_SIZE];
char *c;
ssize_t rc;
if (!hdev->mmu_enable)
return count;
- memset(kbuf, 0, sizeof(kbuf));
- memset(asid_kbuf, 0, sizeof(asid_kbuf));
- memset(addr_kbuf, 0, sizeof(addr_kbuf));
-
+ if (count > sizeof(kbuf) - 1)
+ goto err;
if (copy_from_user(kbuf, buf, count))
goto err;
-
- kbuf[MMU_KBUF_SIZE - 1] = 0;
+ kbuf[count] = 0;
c = strchr(kbuf, ' ');
if (!c)
goto err;
+ *c = '\0';
- memcpy(asid_kbuf, kbuf, c - kbuf);
-
- rc = kstrtouint(asid_kbuf, 10, &dev_entry->mmu_asid);
+ rc = kstrtouint(kbuf, 10, &dev_entry->mmu_asid);
if (rc)
goto err;
- c = strstr(kbuf, " 0x");
- if (!c)
+ if (strncmp(c+1, "0x", 2))
goto err;
-
- c += 3;
- memcpy(addr_kbuf, c, (kbuf + count) - c);
-
- rc = kstrtoull(addr_kbuf, 16, &dev_entry->mmu_addr);
+ rc = kstrtoull(c+3, 16, &dev_entry->mmu_addr);
if (rc)
goto err;
@@ -505,30 +495,106 @@ err:
return -EINVAL;
}
+static int device_va_to_pa(struct hl_device *hdev, u64 virt_addr,
+ u64 *phys_addr)
+{
+ struct hl_ctx *ctx = hdev->user_ctx;
+ u64 hop_addr, hop_pte_addr, hop_pte;
+ u64 offset_mask = HOP4_MASK | OFFSET_MASK;
+ int rc = 0;
+
+ if (!ctx) {
+ dev_err(hdev->dev, "no ctx available\n");
+ return -EINVAL;
+ }
+
+ mutex_lock(&ctx->mmu_lock);
+
+ /* hop 0 */
+ hop_addr = get_hop0_addr(ctx);
+ hop_pte_addr = get_hop0_pte_addr(ctx, hop_addr, virt_addr);
+ hop_pte = hdev->asic_funcs->read_pte(hdev, hop_pte_addr);
+
+ /* hop 1 */
+ hop_addr = get_next_hop_addr(hop_pte);
+ if (hop_addr == ULLONG_MAX)
+ goto not_mapped;
+ hop_pte_addr = get_hop1_pte_addr(ctx, hop_addr, virt_addr);
+ hop_pte = hdev->asic_funcs->read_pte(hdev, hop_pte_addr);
+
+ /* hop 2 */
+ hop_addr = get_next_hop_addr(hop_pte);
+ if (hop_addr == ULLONG_MAX)
+ goto not_mapped;
+ hop_pte_addr = get_hop2_pte_addr(ctx, hop_addr, virt_addr);
+ hop_pte = hdev->asic_funcs->read_pte(hdev, hop_pte_addr);
+
+ /* hop 3 */
+ hop_addr = get_next_hop_addr(hop_pte);
+ if (hop_addr == ULLONG_MAX)
+ goto not_mapped;
+ hop_pte_addr = get_hop3_pte_addr(ctx, hop_addr, virt_addr);
+ hop_pte = hdev->asic_funcs->read_pte(hdev, hop_pte_addr);
+
+ if (!(hop_pte & LAST_MASK)) {
+ /* hop 4 */
+ hop_addr = get_next_hop_addr(hop_pte);
+ if (hop_addr == ULLONG_MAX)
+ goto not_mapped;
+ hop_pte_addr = get_hop4_pte_addr(ctx, hop_addr, virt_addr);
+ hop_pte = hdev->asic_funcs->read_pte(hdev, hop_pte_addr);
+
+ offset_mask = OFFSET_MASK;
+ }
+
+ if (!(hop_pte & PAGE_PRESENT_MASK))
+ goto not_mapped;
+
+ *phys_addr = (hop_pte & ~offset_mask) | (virt_addr & offset_mask);
+
+ goto out;
+
+not_mapped:
+ dev_err(hdev->dev, "virt addr 0x%llx is not mapped to phys addr\n",
+ virt_addr);
+ rc = -EINVAL;
+out:
+ mutex_unlock(&ctx->mmu_lock);
+ return rc;
+}
+
static ssize_t hl_data_read32(struct file *f, char __user *buf,
size_t count, loff_t *ppos)
{
struct hl_dbg_device_entry *entry = file_inode(f)->i_private;
struct hl_device *hdev = entry->hdev;
+ struct asic_fixed_properties *prop = &hdev->asic_prop;
char tmp_buf[32];
+ u64 addr = entry->addr;
u32 val;
ssize_t rc;
if (*ppos)
return 0;
- rc = hdev->asic_funcs->debugfs_read32(hdev, entry->addr, &val);
+ if (addr >= prop->va_space_dram_start_address &&
+ addr < prop->va_space_dram_end_address &&
+ hdev->mmu_enable &&
+ hdev->dram_supports_virtual_memory) {
+ rc = device_va_to_pa(hdev, entry->addr, &addr);
+ if (rc)
+ return rc;
+ }
+
+ rc = hdev->asic_funcs->debugfs_read32(hdev, addr, &val);
if (rc) {
- dev_err(hdev->dev, "Failed to read from 0x%010llx\n",
- entry->addr);
+ dev_err(hdev->dev, "Failed to read from 0x%010llx\n", addr);
return rc;
}
sprintf(tmp_buf, "0x%08x\n", val);
- rc = simple_read_from_buffer(buf, strlen(tmp_buf) + 1, ppos, tmp_buf,
- strlen(tmp_buf) + 1);
-
- return rc;
+ return simple_read_from_buffer(buf, count, ppos, tmp_buf,
+ strlen(tmp_buf));
}
static ssize_t hl_data_write32(struct file *f, const char __user *buf,
@@ -536,6 +602,8 @@ static ssize_t hl_data_write32(struct file *f, const char __user *buf,
{
struct hl_dbg_device_entry *entry = file_inode(f)->i_private;
struct hl_device *hdev = entry->hdev;
+ struct asic_fixed_properties *prop = &hdev->asic_prop;
+ u64 addr = entry->addr;
u32 value;
ssize_t rc;
@@ -543,10 +611,19 @@ static ssize_t hl_data_write32(struct file *f, const char __user *buf,
if (rc)
return rc;
- rc = hdev->asic_funcs->debugfs_write32(hdev, entry->addr, value);
+ if (addr >= prop->va_space_dram_start_address &&
+ addr < prop->va_space_dram_end_address &&
+ hdev->mmu_enable &&
+ hdev->dram_supports_virtual_memory) {
+ rc = device_va_to_pa(hdev, entry->addr, &addr);
+ if (rc)
+ return rc;
+ }
+
+ rc = hdev->asic_funcs->debugfs_write32(hdev, addr, value);
if (rc) {
dev_err(hdev->dev, "Failed to write 0x%08x to 0x%010llx\n",
- value, entry->addr);
+ value, addr);
return rc;
}
@@ -559,7 +636,6 @@ static ssize_t hl_get_power_state(struct file *f, char __user *buf,
struct hl_dbg_device_entry *entry = file_inode(f)->i_private;
struct hl_device *hdev = entry->hdev;
char tmp_buf[200];
- ssize_t rc;
int i;
if (*ppos)
@@ -574,10 +650,8 @@ static ssize_t hl_get_power_state(struct file *f, char __user *buf,
sprintf(tmp_buf,
"current power state: %d\n1 - D0\n2 - D3hot\n3 - Unknown\n", i);
- rc = simple_read_from_buffer(buf, strlen(tmp_buf) + 1, ppos, tmp_buf,
- strlen(tmp_buf) + 1);
-
- return rc;
+ return simple_read_from_buffer(buf, count, ppos, tmp_buf,
+ strlen(tmp_buf));
}
static ssize_t hl_set_power_state(struct file *f, const char __user *buf,
@@ -630,8 +704,8 @@ static ssize_t hl_i2c_data_read(struct file *f, char __user *buf,
}
sprintf(tmp_buf, "0x%02x\n", val);
- rc = simple_read_from_buffer(buf, strlen(tmp_buf) + 1, ppos, tmp_buf,
- strlen(tmp_buf) + 1);
+ rc = simple_read_from_buffer(buf, count, ppos, tmp_buf,
+ strlen(tmp_buf));
return rc;
}
@@ -720,18 +794,9 @@ static ssize_t hl_led2_write(struct file *f, const char __user *buf,
static ssize_t hl_device_read(struct file *f, char __user *buf,
size_t count, loff_t *ppos)
{
- char tmp_buf[200];
- ssize_t rc;
-
- if (*ppos)
- return 0;
-
- sprintf(tmp_buf,
- "Valid values: disable, enable, suspend, resume, cpu_timeout\n");
- rc = simple_read_from_buffer(buf, strlen(tmp_buf) + 1, ppos, tmp_buf,
- strlen(tmp_buf) + 1);
-
- return rc;
+ static const char *help =
+ "Valid values: disable, enable, suspend, resume, cpu_timeout\n";
+ return simple_read_from_buffer(buf, count, ppos, help, strlen(help));
}
static ssize_t hl_device_write(struct file *f, const char __user *buf,
@@ -739,7 +804,7 @@ static ssize_t hl_device_write(struct file *f, const char __user *buf,
{
struct hl_dbg_device_entry *entry = file_inode(f)->i_private;
struct hl_device *hdev = entry->hdev;
- char data[30];
+ char data[30] = {0};
/* don't allow partial writes */
if (*ppos != 0)
generated by cgit v1.2.3 (git 2.39.0) at 2024-07-31 07:29:14 +0300