From 1dae12fe1bf7ae98f31223b47253f4dd6b0a2909 Mon Sep 17 00:00:00 2001 From: Ofir Bitton Date: Wed, 12 May 2021 09:07:39 +0300 Subject: [PATCH] habanalabs/gaudi: do not move HBM bar if iATU done by FW As iATU configuration is done by FW, driver should not try and move HBM bar. Signed-off-by: Ofir Bitton Reviewed-by: Oded Gabbay Signed-off-by: Oded Gabbay --- 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 6bd9167f..1fa1239 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) { -- 2.7.4