Messages in this thread Patch in this message |  | | From | Oded Gabbay <> | Subject | [PATCH 5/5] habanalabs/gaudi: do not move HBM bar if iATU done by FW | Date | Sat, 15 May 2021 19:31:16 +0300 |
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From: Ofir Bitton <obitton@habana.ai>
As iATU configuration is done by FW, driver should not try and move HBM bar.
Signed-off-by: Ofir Bitton <obitton@habana.ai> Reviewed-by: Oded Gabbay <ogabbay@kernel.org> Signed-off-by: Oded Gabbay <ogabbay@kernel.org> --- drivers/misc/habanalabs/gaudi/gaudi.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+)
diff --git a/drivers/misc/habanalabs/gaudi/gaudi.c b/drivers/misc/habanalabs/gaudi/gaudi.c index 375f7893b84a..6654f95caecd 100644 --- a/drivers/misc/habanalabs/gaudi/gaudi.c +++ b/drivers/misc/habanalabs/gaudi/gaudi.c @@ -580,6 +580,9 @@ static u64 gaudi_set_hbm_bar_base(struct hl_device *hdev, u64 addr) if ((gaudi) && (gaudi->hbm_bar_cur_addr == addr)) return old_addr; + if (hdev->asic_prop.iatu_done_by_fw) + return U64_MAX; + /* Inbound Region 2 - Bar 4 - Point to HBM */ pci_region.mode = PCI_BAR_MATCH_MODE; pci_region.bar = HBM_BAR_ID; @@ -3974,10 +3977,27 @@ static void gaudi_pre_hw_init(struct hl_device *hdev) static int gaudi_hw_init(struct hl_device *hdev) { + struct gaudi_device *gaudi = hdev->asic_specific; int rc; gaudi_pre_hw_init(hdev); + /* If iATU is done by FW, the HBM bar ALWAYS points to DRAM_PHYS_BASE. + * So we set it here and if anyone tries to move it later to + * a different address, there will be an error + */ + if (hdev->asic_prop.iatu_done_by_fw) + gaudi->hbm_bar_cur_addr = DRAM_PHYS_BASE; + + /* + * Before pushing u-boot/linux to device, need to set the hbm bar to + * base address of dram + */ + if (gaudi_set_hbm_bar_base(hdev, DRAM_PHYS_BASE) == U64_MAX) { + dev_err(hdev->dev, + "failed to map HBM bar to DRAM base address\n"); + return -EIO; + } rc = gaudi_init_cpu(hdev); if (rc) { -- 2.25.1
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