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habanalabs: save pid per userptr

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Currently userptr endpoint in debugfs prints out virtual addresses
in the user process memory space, without specifying their owner process
ID. User space virtual address is meaningless without knowing the owner
process.

Signed-off-by: Yuri Nudelman <ynudelman@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
This commit is contained in:
Yuri Nudelman 2021-07-27 17:39:42 +03:00 committed by Oded Gabbay
parent 83f14f2f9b
commit 714fccbf48
3 changed files with 7 additions and 4 deletions
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8
drivers/misc/habanalabs/common/debugfs.c
View File

@ -209,12 +209,12 @@ static int userptr_show(struct seq_file *s, void *data)
if (first) {
first = false;
seq_puts(s, "\n");
seq_puts(s, " user virtual address size dma dir\n");
seq_puts(s, " pid user virtual address size dma dir\n");
seq_puts(s, "----------------------------------------------------------\n");
}
seq_printf(s,
" 0x%-14llx %-10llu %-30s\n",
userptr->addr, userptr->size, dma_dir[userptr->dir]);
seq_printf(s, " %-7d 0x%-14llx %-10llu %-30s\n",
userptr->pid, userptr->addr, userptr->size,
dma_dir[userptr->dir]);
}
spin_unlock(&dev_entry->userptr_spinlock);

2
drivers/misc/habanalabs/common/habanalabs.h
View File

@ -1434,6 +1434,7 @@ struct hl_ctx_mgr {
* @sgt: pointer to the scatter-gather table that holds the pages.
* @dir: for DMA unmapping, the direction must be supplied, so save it.
* @debugfs_list: node in debugfs list of command submissions.
* @pid: the pid of the user process owning the memory
* @addr: user-space virtual address of the start of the memory area.
* @size: size of the memory area to pin & map.
* @dma_mapped: true if the SG was mapped to DMA addresses, false otherwise.
@ -1446,6 +1447,7 @@ struct hl_userptr {
struct sg_table *sgt;
enum dma_data_direction dir;
struct list_head debugfs_list;
pid_t pid;
u64 addr;
u64 size;
u8 dma_mapped;

1
drivers/misc/habanalabs/common/memory.c
View File

@ -1762,6 +1762,7 @@ int hl_pin_host_memory(struct hl_device *hdev, u64 addr, u64 size,
return -EINVAL;
}
userptr->pid = current->pid;
userptr->sgt = kzalloc(sizeof(*userptr->sgt), GFP_KERNEL);
if (!userptr->sgt)
return -ENOMEM;