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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 <obitton@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
This commit is contained in:
Ofir Bitton 2021-05-12 09:07:39 +03:00 committed by Oded Gabbay
parent e591a49cb5
commit 1dae12fe1b
1 changed files with 20 additions and 0 deletions
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20
drivers/misc/habanalabs/gaudi/gaudi.c
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@ -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) {