diff options
| author | Mukesh Sisodiya <mukesh.sisodiya@intel.com> | 2022-01-29 13:16:19 +0200 |
|---|---|---|
| committer | Luca Coelho <luciano.coelho@intel.com> | 2022-02-18 10:40:51 +0200 |
| commit | c0941ace9a134bd1a9c2c09afad4e6bf0066c1e3 (patch) | |
| tree | a22d3d98ec7a3f87ae722f4832248a819ead7b72 /drivers/net/wireless/intel/iwlwifi/pcie/trans.c | |
| parent | ab23da483bd79df414edd652acb5350b1acde566 (diff) | |
iwlwifi: yoyo: add IMR DRAM dump support
Support debug collection of the platform IMR memory region,
where data is copied by FW during d3 state
Signed-off-by: Mukesh Sisodiya <mukesh.sisodiya@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20220129105618.715f04ecc635.Ib89a6caa06c1324c1c0dd3f9f4cf7407f2857155@changeid
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/pcie/trans.c')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/pcie/trans.c | 42 |
1 files changed, 41 insertions, 1 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c index 94efaddfdcc4..cafc4d0e66b9 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c @@ -3469,7 +3469,8 @@ static void iwl_trans_pcie_sync_nmi(struct iwl_trans *trans) .d3_suspend = iwl_trans_pcie_d3_suspend, \ .d3_resume = iwl_trans_pcie_d3_resume, \ .interrupts = iwl_trans_pci_interrupts, \ - .sync_nmi = iwl_trans_pcie_sync_nmi \ + .sync_nmi = iwl_trans_pcie_sync_nmi, \ + .imr_dma_data = iwl_trans_pcie_copy_imr \ static const struct iwl_trans_ops trans_ops_pcie = { IWL_TRANS_COMMON_OPS, @@ -3554,6 +3555,7 @@ struct iwl_trans *iwl_trans_pcie_alloc(struct pci_dev *pdev, mutex_init(&trans_pcie->mutex); init_waitqueue_head(&trans_pcie->ucode_write_waitq); init_waitqueue_head(&trans_pcie->fw_reset_waitq); + init_waitqueue_head(&trans_pcie->imr_waitq); trans_pcie->rba.alloc_wq = alloc_workqueue("rb_allocator", WQ_HIGHPRI | WQ_UNBOUND, 1); @@ -3682,3 +3684,41 @@ out_free_trans: iwl_trans_free(trans); return ERR_PTR(ret); } + +void iwl_trans_pcie_copy_imr_fh(struct iwl_trans *trans, + u32 dst_addr, u64 src_addr, u32 byte_cnt) +{ + iwl_write_prph(trans, IMR_UREG_CHICK, + iwl_read_prph(trans, IMR_UREG_CHICK) | + IMR_UREG_CHICK_HALT_UMAC_PERMANENTLY_MSK); + iwl_write_prph(trans, IMR_TFH_SRV_DMA_CHNL0_SRAM_ADDR, dst_addr); + iwl_write_prph(trans, IMR_TFH_SRV_DMA_CHNL0_DRAM_ADDR_LSB, + (u32)(src_addr & 0xFFFFFFFF)); + iwl_write_prph(trans, IMR_TFH_SRV_DMA_CHNL0_DRAM_ADDR_MSB, + iwl_get_dma_hi_addr(src_addr)); + iwl_write_prph(trans, IMR_TFH_SRV_DMA_CHNL0_BC, byte_cnt); + iwl_write_prph(trans, IMR_TFH_SRV_DMA_CHNL0_CTRL, + IMR_TFH_SRV_DMA_CHNL0_CTRL_D2S_IRQ_TARGET_POS | + IMR_TFH_SRV_DMA_CHNL0_CTRL_D2S_DMA_EN_POS | + IMR_TFH_SRV_DMA_CHNL0_CTRL_D2S_RS_MSK); +} + +int iwl_trans_pcie_copy_imr(struct iwl_trans *trans, + u32 dst_addr, u64 src_addr, u32 byte_cnt) +{ + struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); + int ret = -1; + + trans_pcie->imr_status = IMR_D2S_REQUESTED; + iwl_trans_pcie_copy_imr_fh(trans, dst_addr, src_addr, byte_cnt); + ret = wait_event_timeout(trans_pcie->imr_waitq, + trans_pcie->imr_status != + IMR_D2S_REQUESTED, 5 * HZ); + if (!ret || trans_pcie->imr_status == IMR_D2S_ERROR) { + IWL_ERR(trans, "Failed to copy IMR Memory chunk!\n"); + iwl_trans_pcie_dump_regs(trans); + return -ETIMEDOUT; + } + trans_pcie->imr_status = IMR_D2S_IDLE; + return 0; +} |