Why do we see the error message about "Malformed TLP packet"?

Description

Due to a problem in the Intel® Stratix® 10 PCI Express* Root Port example design with MSI, the Intel® Stratix® 10 HPS PCI Express Root Port can't mount Micron 2100AI NVME SSD, and a "Malformed TLP packet" message is shown during the boot up.

 

Resolution

To work around this problem in the Intel® Stratix® 10 PCI Express* Root Port example design with MSI, add the below code in the "s10_tlp_read_packet" function in file drivers/pci/controller/pcie-altera.c

 

for (i = 0; i < 5; i++) {

                ctrl = cra_readl(pcie, S10_RP_RXCPL_STATUS);

                dw[count-1] = cra_readl(pcie, S10_RP_RXCPL_REG);

 

                printk("status %x data %x\n",ctrl,dw[count-1]);

                if (ctrl & RP_RXCPL_EOP) {

                        return PCIBIOS_SUCCESSFUL;

                }

        }

 

        dev_warn(dev, "Malformed TLP packet\n");