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e4efdfcaaf
Move the iwl_trans_pcie_dump_regs() function to utils.c in the PCIe directory since it operates on PCIe registers and is not hardware-dependent. Refactor the pcie_dbg_dumped_once indicator, previously part of the iwl_trans_pcie struct, into a static variable within the iwl_trans_pcie_dump_regs() function, where it is used. Signed-off-by: Rotem Kerem <rotem.kerem@intel.com> Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com> Link: https://patch.msgid.link/20250612144708.06950459ce97.I3105158eb9ae698efebe4b9ada1093aeb1f1b869@changeid
104 lines
3.2 KiB
C
104 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
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/*
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* Copyright (C) 2025 Intel Corporation
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*/
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#include <linux/pci.h>
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#include <linux/gfp.h>
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#include "iwl-io.h"
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#include "pcie/utils.h"
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void iwl_trans_pcie_dump_regs(struct iwl_trans *trans, struct pci_dev *pdev)
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{
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#define PCI_DUMP_SIZE 352
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#define PCI_MEM_DUMP_SIZE 64
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#define PCI_PARENT_DUMP_SIZE 524
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#define PREFIX_LEN 32
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static bool pcie_dbg_dumped_once = 0;
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u32 i, pos, alloc_size, *ptr, *buf;
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char *prefix;
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if (pcie_dbg_dumped_once)
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return;
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/* Should be a multiple of 4 */
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BUILD_BUG_ON(PCI_DUMP_SIZE > 4096 || PCI_DUMP_SIZE & 0x3);
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BUILD_BUG_ON(PCI_MEM_DUMP_SIZE > 4096 || PCI_MEM_DUMP_SIZE & 0x3);
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BUILD_BUG_ON(PCI_PARENT_DUMP_SIZE > 4096 || PCI_PARENT_DUMP_SIZE & 0x3);
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/* Alloc a max size buffer */
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alloc_size = PCI_ERR_ROOT_ERR_SRC + 4 + PREFIX_LEN;
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alloc_size = max_t(u32, alloc_size, PCI_DUMP_SIZE + PREFIX_LEN);
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alloc_size = max_t(u32, alloc_size, PCI_MEM_DUMP_SIZE + PREFIX_LEN);
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alloc_size = max_t(u32, alloc_size, PCI_PARENT_DUMP_SIZE + PREFIX_LEN);
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buf = kmalloc(alloc_size, GFP_ATOMIC);
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if (!buf)
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return;
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prefix = (char *)buf + alloc_size - PREFIX_LEN;
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IWL_ERR(trans, "iwlwifi transaction failed, dumping registers\n");
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/* Print wifi device registers */
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sprintf(prefix, "iwlwifi %s: ", pci_name(pdev));
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IWL_ERR(trans, "iwlwifi device config registers:\n");
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for (i = 0, ptr = buf; i < PCI_DUMP_SIZE; i += 4, ptr++)
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if (pci_read_config_dword(pdev, i, ptr))
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goto err_read;
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print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET, 32, 4, buf, i, 0);
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IWL_ERR(trans, "iwlwifi device memory mapped registers:\n");
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for (i = 0, ptr = buf; i < PCI_MEM_DUMP_SIZE; i += 4, ptr++)
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*ptr = iwl_read32(trans, i);
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print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET, 32, 4, buf, i, 0);
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pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
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if (pos) {
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IWL_ERR(trans, "iwlwifi device AER capability structure:\n");
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for (i = 0, ptr = buf; i < PCI_ERR_ROOT_COMMAND; i += 4, ptr++)
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if (pci_read_config_dword(pdev, pos + i, ptr))
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goto err_read;
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print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET,
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32, 4, buf, i, 0);
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}
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/* Print parent device registers next */
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if (!pdev->bus->self)
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goto out;
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pdev = pdev->bus->self;
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sprintf(prefix, "iwlwifi %s: ", pci_name(pdev));
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IWL_ERR(trans, "iwlwifi parent port (%s) config registers:\n",
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pci_name(pdev));
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for (i = 0, ptr = buf; i < PCI_PARENT_DUMP_SIZE; i += 4, ptr++)
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if (pci_read_config_dword(pdev, i, ptr))
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goto err_read;
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print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET, 32, 4, buf, i, 0);
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/* Print root port AER registers */
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pos = 0;
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pdev = pcie_find_root_port(pdev);
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if (pdev)
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pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
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if (pos) {
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IWL_ERR(trans, "iwlwifi root port (%s) AER cap structure:\n",
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pci_name(pdev));
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sprintf(prefix, "iwlwifi %s: ", pci_name(pdev));
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for (i = 0, ptr = buf; i <= PCI_ERR_ROOT_ERR_SRC; i += 4, ptr++)
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if (pci_read_config_dword(pdev, pos + i, ptr))
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goto err_read;
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print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET, 32,
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4, buf, i, 0);
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}
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goto out;
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err_read:
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print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET, 32, 4, buf, i, 0);
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IWL_ERR(trans, "Read failed at 0x%X\n", i);
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out:
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pcie_dbg_dumped_once = 1;
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kfree(buf);
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}
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