Hi, > -----Original Message----- > From: Brian Norris [mailto:briannorris@xxxxxxxxxxxx] > Sent: 2017年4月14日 4:11 > To: Xinming Hu > Cc: Linux Wireless; Kalle Valo; Dmitry Torokhov; rajatja@xxxxxxxxxx; Cathy Luo; > Xinming Hu; Ganapathi Bhat > Subject: [EXT] [PATCH v5 4/4] mwifiex: pcie: extract wifi part from combo > firmware during function level reset > > External Email > > ---------------------------------------------------------------------- > From: Xinming Hu <huxm@xxxxxxxxxxx> > > A separate wifi-only firmware was download during pcie function level reset. It > is in fact the tail part of wifi/bt combo firmware. Per Brian's and Dmitry's > suggestion, this patch extract the wifi part from combo firmware. > > After that, the mrvl/pcie8997_wlan_v4.bin image in linux-firmware repo is > redundant (though I guess we keep it around to support older kernels). > > Signed-off-by: Xinming Hu <huxm@xxxxxxxxxxx> > Signed-off-by: Ganapathi Bhat <gbhat@xxxxxxxxxxx> > Signed-off-by: Cathy Luo <cluo@xxxxxxxxxxx> > Signed-off-by: Brian Norris <briannorris@xxxxxxxxxxxx> > --- > On Thu, Apr 13, 2017 at 11:46:30AM -0700, Brian Norris wrote: > > I might just rewrite this and send it myself, if I get the time. > > Done. > > v2: extract wifi part from combo firmware(Dmitry and Brian) > add more description(Kalle) > v3: same as v2 > v4: add sequence comments, code enhance(Brian) > v5: (Brian) fix overflow errors > (Brian) add missing newline chars > (Brian) consolidate header-skipping logic > > Note: I only resubmitted the 4th patch, as the others look fine > --- > drivers/net/wireless/marvell/mwifiex/fw.h | 18 +++++ > drivers/net/wireless/marvell/mwifiex/pcie.c | 114 > ++++++++++++++++++++++++++-- > drivers/net/wireless/marvell/mwifiex/pcie.h | 3 +- > 3 files changed, 127 insertions(+), 8 deletions(-) > > diff --git a/drivers/net/wireless/marvell/mwifiex/fw.h > b/drivers/net/wireless/marvell/mwifiex/fw.h > index 0b683742e30c..6cf9ab9133ea 100644 > --- a/drivers/net/wireless/marvell/mwifiex/fw.h > +++ b/drivers/net/wireless/marvell/mwifiex/fw.h > @@ -43,6 +43,24 @@ struct tx_packet_hdr { > struct rfc_1042_hdr rfc1042_hdr; > } __packed; > > +struct mwifiex_fw_header { > + __le32 dnld_cmd; > + __le32 base_addr; > + __le32 data_length; > + __le32 crc; > +} __packed; > + > +struct mwifiex_fw_data { > + struct mwifiex_fw_header header; > + __le32 seq_num; > + u8 data[1]; > +} __packed; > + > +#define MWIFIEX_FW_DNLD_CMD_1 0x1 > +#define MWIFIEX_FW_DNLD_CMD_5 0x5 > +#define MWIFIEX_FW_DNLD_CMD_6 0x6 > +#define MWIFIEX_FW_DNLD_CMD_7 0x7 > + > #define B_SUPPORTED_RATES 5 > #define G_SUPPORTED_RATES 9 > #define BG_SUPPORTED_RATES 13 > diff --git a/drivers/net/wireless/marvell/mwifiex/pcie.c > b/drivers/net/wireless/marvell/mwifiex/pcie.c > index 061223149bed..63102efb388e 100644 > --- a/drivers/net/wireless/marvell/mwifiex/pcie.c > +++ b/drivers/net/wireless/marvell/mwifiex/pcie.c > @@ -1956,6 +1956,94 @@ static int mwifiex_pcie_event_complete(struct > mwifiex_adapter *adapter, > return ret; > } > > +/* Combo firmware image is a combination of > + * (1) combo crc heaer, start with CMD5 > + * (2) bluetooth image, start with CMD7, end with CMD6, data wrapped in > CMD1. > + * (3) wifi image. > + * > + * This function bypass the header and bluetooth part, return > + * the offset of tail wifi-only part. > + */ > + > +static int mwifiex_extract_wifi_fw(struct mwifiex_adapter *adapter, > + const void *firmware, u32 firmware_len) { > + const struct mwifiex_fw_data *fwdata; > + u32 offset = 0, data_len, dnld_cmd; > + int ret = 0; > + bool cmd7_before = false; > + > + while (1) { > + /* Check for integer and buffer overflow */ > + if (offset + sizeof(fwdata->header) < sizeof(fwdata->header) || > + offset + sizeof(fwdata->header) >= firmware_len) { > + mwifiex_dbg(adapter, ERROR, > + "extract wifi-only fw failure!\n"); > + ret = -1; > + goto done; > + } > + > + fwdata = firmware + offset; > + dnld_cmd = le32_to_cpu(fwdata->header.dnld_cmd); > + data_len = le32_to_cpu(fwdata->header.data_length); > + > + /* Skip past header */ > + offset += sizeof(fwdata->header); > + > + switch (dnld_cmd) { > + case MWIFIEX_FW_DNLD_CMD_1: > + if (!cmd7_before) { > + mwifiex_dbg(adapter, ERROR, > + "no cmd7 before cmd1!\n"); > + ret = -1; > + goto done; > + } > + if (offset + data_len < data_len) { > + mwifiex_dbg(adapter, ERROR, "bad FW parse\n"); > + ret = -1; > + goto done; > + } > + offset += data_len; Looks fine to me. Even though data_len should not exceed MWIFIEX_UPLD_SIZE according to firmware download protocol, and we can add sanity check like， if (data_len > MWIFIEX_UPLD_SIZE - sizeof(fwdata->header)) *error* Considering the future protocol might change MWIFIEX_UPLD_SIZE and the ability to compatible with old driver at that time. overflow check here does provide a general way, and let device take care of invalid data_Len case would be reasonable. Thanks, Simon > + break; > + case MWIFIEX_FW_DNLD_CMD_5: > + /* Check for integer overflow */ > + if (offset + data_len < data_len) { > + mwifiex_dbg(adapter, ERROR, "bad FW parse\n"); > + ret = -1; > + goto done; > + } > + offset += data_len; > + break; > + case MWIFIEX_FW_DNLD_CMD_6: > + /* Check for integer overflow */ > + if (offset + data_len < data_len) { > + mwifiex_dbg(adapter, ERROR, "bad FW parse\n"); > + ret = -1; > + goto done; > + } > + offset += data_len; > + if (offset >= firmware_len) { > + mwifiex_dbg(adapter, ERROR, > + "extract wifi-only fw failure!\n"); > + ret = -1; > + } else { > + ret = offset; > + } > + goto done; > + case MWIFIEX_FW_DNLD_CMD_7: > + cmd7_before = true; > + break; > + default: > + mwifiex_dbg(adapter, ERROR, "unknown dnld_cmd %d\n", > + dnld_cmd); > + ret = -1; > + goto done; > + } > + } > + > +done: > + return ret; > +} > + > /* > * This function downloads the firmware to the card. > * > @@ -1971,7 +2059,7 @@ static int mwifiex_prog_fw_w_helper(struct > mwifiex_adapter *adapter, > u32 firmware_len = fw->fw_len; > u32 offset = 0; > struct sk_buff *skb; > - u32 txlen, tx_blocks = 0, tries, len; > + u32 txlen, tx_blocks = 0, tries, len, val; > u32 block_retry_cnt = 0; > struct pcie_service_card *card = adapter->card; > const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; @@ -1998,6 > +2086,24 @@ static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter > *adapter, > goto done; > } > > + ret = mwifiex_read_reg(adapter, PCIE_SCRATCH_13_REG, &val); > + if (ret) { > + mwifiex_dbg(adapter, FATAL, "Failed to read scratch register 13\n"); > + goto done; > + } > + > + /* PCIE FLR case: extract wifi part from combo firmware*/ > + if (val == MWIFIEX_PCIE_FLR_HAPPENS) { > + ret = mwifiex_extract_wifi_fw(adapter, firmware, firmware_len); > + if (ret < 0) { > + mwifiex_dbg(adapter, ERROR, "Failed to extract wifi fw\n"); > + goto done; > + } > + offset = ret; > + mwifiex_dbg(adapter, MSG, > + "info: dnld wifi firmware from %d bytes\n", offset); > + } > + > /* Perform firmware data transfer */ > do { > u32 ireg_intr = 0; > @@ -3070,12 +3176,6 @@ static void mwifiex_pcie_up_dev(struct > mwifiex_adapter *adapter) > struct pci_dev *pdev = card->dev; > const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; > > - /* Bluetooth is not on pcie interface. Download Wifi only firmware > - * during pcie FLR, so that bluetooth part of firmware which is > - * already running doesn't get affected. > - */ > - strcpy(adapter->fw_name, PCIE8997_DEFAULT_WIFIFW_NAME); > - > /* tx_buf_size might be changed to 3584 by firmware during > * data transfer, we should reset it to default size. > */ > diff --git a/drivers/net/wireless/marvell/mwifiex/pcie.h > b/drivers/net/wireless/marvell/mwifiex/pcie.h > index 7e2450ce79d3..f7ce9b6db6b4 100644 > --- a/drivers/net/wireless/marvell/mwifiex/pcie.h > +++ b/drivers/net/wireless/marvell/mwifiex/pcie.h > @@ -35,7 +35,6 @@ > #define PCIE8897_B0_FW_NAME "mrvl/pcie8897_uapsta.bin" > #define PCIEUART8997_FW_NAME_V4 "mrvl/pcieuart8997_combo_v4.bin" > #define PCIEUSB8997_FW_NAME_V4 "mrvl/pcieusb8997_combo_v4.bin" > -#define PCIE8997_DEFAULT_WIFIFW_NAME "mrvl/pcie8997_wlan_v4.bin" > > #define PCIE_VENDOR_ID_MARVELL (0x11ab) > #define PCIE_VENDOR_ID_V2_MARVELL (0x1b4b) > @@ -120,6 +119,8 @@ > #define MWIFIEX_SLEEP_COOKIE_SIZE 4 > #define MWIFIEX_MAX_DELAY_COUNT 100 > > +#define MWIFIEX_PCIE_FLR_HAPPENS 0xFEDCBABA > + > struct mwifiex_pcie_card_reg { > u16 cmd_addr_lo; > u16 cmd_addr_hi; > -- > 2.12.2.762
