Commit 214afa97 authored by Moti Haimovski's avatar Moti Haimovski Committed by Oded Gabbay
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habanalabs: add debugfs support for MMU with 6 HOPs 



This commit modify the existing debugfs code to support future devices that
have a 6 HOPs MMU implementation instead of 5 HOPs implementation.

Signed-off-by: default avatarMoti Haimovski <mhaimovski@habana.ai>
Reviewed-by: default avatarOded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: default avatarOded Gabbay <oded.gabbay@gmail.com>
parent 7edf341b

drivers/misc/habanalabs/common/debugfs.c

+60 −10
Original line number Diff line number Diff line
@@ -354,6 +354,14 @@ static inline u64 get_hop4_pte_addr(struct hl_ctx *ctx, 
					mmu_specs->hop4_shift);

}



static inline u64 get_hop5_pte_addr(struct hl_ctx *ctx,

					struct hl_mmu_properties *mmu_specs,

					u64 hop_addr, u64 vaddr)

{

	return get_hopN_pte_addr(ctx, hop_addr, vaddr, mmu_specs->hop5_mask,

					mmu_specs->hop5_shift);

}



static inline u64 get_next_hop_addr(u64 curr_pte)

{

	if (curr_pte & PAGE_PRESENT_MASK)
@@ -377,6 +385,7 @@ static int mmu_show(struct seq_file *s, void *data) 
		hop2_addr = 0, hop2_pte_addr = 0, hop2_pte = 0,

		hop3_addr = 0, hop3_pte_addr = 0, hop3_pte = 0,

		hop4_addr = 0, hop4_pte_addr = 0, hop4_pte = 0,

		hop5_addr = 0, hop5_pte_addr = 0, hop5_pte = 0,

		virt_addr = dev_entry->mmu_addr;



	if (!hdev->mmu_enable)
@@ -428,21 +437,50 @@ static int mmu_show(struct seq_file *s, void *data) 
	hop3_pte_addr = get_hop3_pte_addr(ctx, mmu_prop, hop3_addr, virt_addr);

	hop3_pte = hdev->asic_funcs->read_pte(hdev, hop3_pte_addr);



	if (mmu_prop->num_hops == MMU_ARCH_5_HOPS) {

		if (!(hop3_pte & LAST_MASK)) {

			hop4_addr = get_next_hop_addr(hop3_pte);



			if (hop4_addr == ULLONG_MAX)

				goto not_mapped;



		hop4_pte_addr = get_hop4_pte_addr(ctx, mmu_prop, hop4_addr,

							virt_addr);

		hop4_pte = hdev->asic_funcs->read_pte(hdev, hop4_pte_addr);

			hop4_pte_addr = get_hop4_pte_addr(ctx, mmu_prop,

							hop4_addr, virt_addr);

			hop4_pte = hdev->asic_funcs->read_pte(hdev,

								hop4_pte_addr);

			if (!(hop4_pte & PAGE_PRESENT_MASK))

				goto not_mapped;

		} else {

			if (!(hop3_pte & PAGE_PRESENT_MASK))

				goto not_mapped;

		}

	} else {

		hop4_addr = get_next_hop_addr(hop3_pte);



		if (hop4_addr == ULLONG_MAX)

			goto not_mapped;



		hop4_pte_addr = get_hop4_pte_addr(ctx, mmu_prop,

						hop4_addr, virt_addr);

		hop4_pte = hdev->asic_funcs->read_pte(hdev,

							hop4_pte_addr);

		if (!(hop4_pte & LAST_MASK)) {

			hop5_addr = get_next_hop_addr(hop4_pte);



			if (hop5_addr == ULLONG_MAX)

				goto not_mapped;



			hop5_pte_addr = get_hop5_pte_addr(ctx, mmu_prop,

							hop5_addr, virt_addr);

			hop5_pte = hdev->asic_funcs->read_pte(hdev,

								hop5_pte_addr);

			if (!(hop5_pte & PAGE_PRESENT_MASK))

				goto not_mapped;

		} else {

			if (!(hop4_pte & PAGE_PRESENT_MASK))

				goto not_mapped;

		}

	}



	seq_printf(s, "asid: %u, virt_addr: 0x%llx\n",

			dev_entry->mmu_asid, dev_entry->mmu_addr);
@@ -463,11 +501,23 @@ static int mmu_show(struct seq_file *s, void *data) 
	seq_printf(s, "hop3_pte_addr: 0x%llx\n", hop3_pte_addr);

	seq_printf(s, "hop3_pte: 0x%llx\n", hop3_pte);



	if (mmu_prop->num_hops == MMU_ARCH_5_HOPS) {

		if (!(hop3_pte & LAST_MASK)) {

			seq_printf(s, "hop4_addr: 0x%llx\n", hop4_addr);

			seq_printf(s, "hop4_pte_addr: 0x%llx\n", hop4_pte_addr);

			seq_printf(s, "hop4_pte: 0x%llx\n", hop4_pte);

		}

	} else {

		seq_printf(s, "hop4_addr: 0x%llx\n", hop4_addr);

		seq_printf(s, "hop4_pte_addr: 0x%llx\n", hop4_pte_addr);

		seq_printf(s, "hop4_pte: 0x%llx\n", hop4_pte);



		if (!(hop4_pte & LAST_MASK)) {

			seq_printf(s, "hop5_addr: 0x%llx\n", hop5_addr);

			seq_printf(s, "hop5_pte_addr: 0x%llx\n", hop5_pte_addr);

			seq_printf(s, "hop5_pte: 0x%llx\n", hop5_pte);

		}

	}



	goto out;