| Message ID | 20240827034927.66659-7-doug@schmorgal.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | hw/net/can/xlnx-versal-canfd: Miscellaneous fixes | expand |
On Tuesday 27 of August 2024 05:49:26 Doug Brown wrote: > Use QEMU's helper functions can_dlc2len() and can_len2dlc() for > translating between the raw DLC value and the SocketCAN length value. > This also has the side effect of correctly handling received CAN FD > frames with a DLC of 0-8, which was broken previously. > > Signed-off-by: Doug Brown <doug@schmorgal.com> Reviewed-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
On Mon, Aug 26, 2024 at 08:49:26PM -0700, Doug Brown wrote: > Use QEMU's helper functions can_dlc2len() and can_len2dlc() for > translating between the raw DLC value and the SocketCAN length value. > This also has the side effect of correctly handling received CAN FD > frames with a DLC of 0-8, which was broken previously. > > Signed-off-by: Doug Brown <doug@schmorgal.com> Reviewed-by: Francisco Iglesias <francisco.iglesias@amd.com> > --- > hw/net/can/xlnx-versal-canfd.c | 67 ++-------------------------------- > 1 file changed, 4 insertions(+), 63 deletions(-) > > diff --git a/hw/net/can/xlnx-versal-canfd.c b/hw/net/can/xlnx-versal-canfd.c > index 5d7adf8740..589c21db69 100644 > --- a/hw/net/can/xlnx-versal-canfd.c > +++ b/hw/net/can/xlnx-versal-canfd.c > @@ -678,8 +678,6 @@ REG32(RB_DW15_REGISTER_1, 0x4144) > FIELD(RB_DW15_REGISTER_1, DATA_BYTES62, 8, 8) > FIELD(RB_DW15_REGISTER_1, DATA_BYTES63, 0, 8) > > -static uint8_t canfd_dlc_array[8] = {8, 12, 16, 20, 24, 32, 48, 64}; > - > static void canfd_update_irq(XlnxVersalCANFDState *s) > { > const bool irq = (s->regs[R_INTERRUPT_STATUS_REGISTER] & > @@ -897,59 +895,19 @@ static void regs2frame(XlnxVersalCANFDState *s, qemu_can_frame *frame, > } > > if (FIELD_EX32(dlc_reg_val, TB0_DLC_REGISTER, FDF)) { > - /* > - * CANFD frame. > - * Converting dlc(0 to 15) 4 Byte data to plain length(i.e. 0 to 64) > - * 1 Byte data. This is done to make it work with SocketCAN. > - * On actual CANFD frame, this value can't be more than 0xF. > - * Conversion table for DLC to plain length: > - * > - * DLC Plain Length > - * 0 - 8 0 - 8 > - * 9 9 - 12 > - * 10 13 - 16 > - * 11 17 - 20 > - * 12 21 - 24 > - * 13 25 - 32 > - * 14 33 - 48 > - * 15 49 - 64 > - */ > - > frame->flags |= QEMU_CAN_FRMF_TYPE_FD; > > - if (dlc_value < 8) { > - frame->can_dlc = dlc_value; > - } else { > - assert((dlc_value - 8) < ARRAY_SIZE(canfd_dlc_array)); > - frame->can_dlc = canfd_dlc_array[dlc_value - 8]; > - } > - > if (FIELD_EX32(dlc_reg_val, TB0_DLC_REGISTER, BRS)) { > frame->flags |= QEMU_CAN_FRMF_BRS; > } > } else { > - /* > - * FD Format bit not set that means it is a CAN Frame. > - * Conversion table for classic CAN: > - * > - * DLC Plain Length > - * 0 - 7 0 - 7 > - * 8 - 15 8 > - */ > - > - if (dlc_value > 8) { > - frame->can_dlc = 8; > - qemu_log_mask(LOG_GUEST_ERROR, "Maximum DLC value for Classic CAN" > - " frame is 8. Only 8 byte data will be sent.\n"); > - } else { > - frame->can_dlc = dlc_value; > - } > - > if (is_rtr) { > frame->can_id |= QEMU_CAN_RTR_FLAG; > } > } > > + frame->can_dlc = can_dlc2len(dlc_value); > + > for (j = 0; j < frame->can_dlc; j++) { > val = 8 * (3 - i); > > @@ -1007,7 +965,6 @@ static void store_rx_sequential(XlnxVersalCANFDState *s, > bool rx_fifo_id, uint8_t filter_index) > { > int i; > - bool is_canfd_frame; > uint8_t dlc = frame->can_dlc; > uint8_t rx_reg_num = 0; > uint32_t dlc_reg_val = 0; > @@ -1053,17 +1010,10 @@ static void store_rx_sequential(XlnxVersalCANFDState *s, > > s->regs[store_location] = frame_to_reg_id(frame); > > - dlc = frame->can_dlc; > + dlc_reg_val = FIELD_DP32(0, RB_DLC_REGISTER, DLC, can_len2dlc(dlc)); > > if (frame->flags & QEMU_CAN_FRMF_TYPE_FD) { > - is_canfd_frame = true; > - > - /* Store dlc value in Xilinx specific format. */ > - for (i = 0; i < ARRAY_SIZE(canfd_dlc_array); i++) { > - if (canfd_dlc_array[i] == frame->can_dlc) { > - dlc_reg_val = FIELD_DP32(0, RB_DLC_REGISTER, DLC, 8 + i); > - } > - } > + dlc_reg_val |= FIELD_DP32(0, RB_DLC_REGISTER, FDF, 1); > > if (frame->flags & QEMU_CAN_FRMF_BRS) { > dlc_reg_val |= FIELD_DP32(0, RB_DLC_REGISTER, BRS, 1); > @@ -1071,17 +1021,8 @@ static void store_rx_sequential(XlnxVersalCANFDState *s, > if (frame->flags & QEMU_CAN_FRMF_ESI) { > dlc_reg_val |= FIELD_DP32(0, RB_DLC_REGISTER, ESI, 1); > } > - } else { > - is_canfd_frame = false; > - > - if (frame->can_dlc > 8) { > - dlc = 8; > - } > - > - dlc_reg_val = FIELD_DP32(0, RB_DLC_REGISTER, DLC, dlc); > } > > - dlc_reg_val |= FIELD_DP32(0, RB_DLC_REGISTER, FDF, is_canfd_frame); > dlc_reg_val |= FIELD_DP32(0, RB_DLC_REGISTER, TIMESTAMP, rx_timestamp); > dlc_reg_val |= FIELD_DP32(0, RB_DLC_REGISTER, MATCHED_FILTER_INDEX, > filter_index); > -- > 2.34.1 >
diff --git a/hw/net/can/xlnx-versal-canfd.c b/hw/net/can/xlnx-versal-canfd.c index 5d7adf8740..589c21db69 100644 --- a/hw/net/can/xlnx-versal-canfd.c +++ b/hw/net/can/xlnx-versal-canfd.c @@ -678,8 +678,6 @@ REG32(RB_DW15_REGISTER_1, 0x4144) FIELD(RB_DW15_REGISTER_1, DATA_BYTES62, 8, 8) FIELD(RB_DW15_REGISTER_1, DATA_BYTES63, 0, 8) -static uint8_t canfd_dlc_array[8] = {8, 12, 16, 20, 24, 32, 48, 64}; - static void canfd_update_irq(XlnxVersalCANFDState *s) { const bool irq = (s->regs[R_INTERRUPT_STATUS_REGISTER] & @@ -897,59 +895,19 @@ static void regs2frame(XlnxVersalCANFDState *s, qemu_can_frame *frame, } if (FIELD_EX32(dlc_reg_val, TB0_DLC_REGISTER, FDF)) { - /* - * CANFD frame. - * Converting dlc(0 to 15) 4 Byte data to plain length(i.e. 0 to 64) - * 1 Byte data. This is done to make it work with SocketCAN. - * On actual CANFD frame, this value can't be more than 0xF. - * Conversion table for DLC to plain length: - * - * DLC Plain Length - * 0 - 8 0 - 8 - * 9 9 - 12 - * 10 13 - 16 - * 11 17 - 20 - * 12 21 - 24 - * 13 25 - 32 - * 14 33 - 48 - * 15 49 - 64 - */ - frame->flags |= QEMU_CAN_FRMF_TYPE_FD; - if (dlc_value < 8) { - frame->can_dlc = dlc_value; - } else { - assert((dlc_value - 8) < ARRAY_SIZE(canfd_dlc_array)); - frame->can_dlc = canfd_dlc_array[dlc_value - 8]; - } - if (FIELD_EX32(dlc_reg_val, TB0_DLC_REGISTER, BRS)) { frame->flags |= QEMU_CAN_FRMF_BRS; } } else { - /* - * FD Format bit not set that means it is a CAN Frame. - * Conversion table for classic CAN: - * - * DLC Plain Length - * 0 - 7 0 - 7 - * 8 - 15 8 - */ - - if (dlc_value > 8) { - frame->can_dlc = 8; - qemu_log_mask(LOG_GUEST_ERROR, "Maximum DLC value for Classic CAN" - " frame is 8. Only 8 byte data will be sent.\n"); - } else { - frame->can_dlc = dlc_value; - } - if (is_rtr) { frame->can_id |= QEMU_CAN_RTR_FLAG; } } + frame->can_dlc = can_dlc2len(dlc_value); + for (j = 0; j < frame->can_dlc; j++) { val = 8 * (3 - i); @@ -1007,7 +965,6 @@ static void store_rx_sequential(XlnxVersalCANFDState *s, bool rx_fifo_id, uint8_t filter_index) { int i; - bool is_canfd_frame; uint8_t dlc = frame->can_dlc; uint8_t rx_reg_num = 0; uint32_t dlc_reg_val = 0; @@ -1053,17 +1010,10 @@ static void store_rx_sequential(XlnxVersalCANFDState *s, s->regs[store_location] = frame_to_reg_id(frame); - dlc = frame->can_dlc; + dlc_reg_val = FIELD_DP32(0, RB_DLC_REGISTER, DLC, can_len2dlc(dlc)); if (frame->flags & QEMU_CAN_FRMF_TYPE_FD) { - is_canfd_frame = true; - - /* Store dlc value in Xilinx specific format. */ - for (i = 0; i < ARRAY_SIZE(canfd_dlc_array); i++) { - if (canfd_dlc_array[i] == frame->can_dlc) { - dlc_reg_val = FIELD_DP32(0, RB_DLC_REGISTER, DLC, 8 + i); - } - } + dlc_reg_val |= FIELD_DP32(0, RB_DLC_REGISTER, FDF, 1); if (frame->flags & QEMU_CAN_FRMF_BRS) { dlc_reg_val |= FIELD_DP32(0, RB_DLC_REGISTER, BRS, 1); @@ -1071,17 +1021,8 @@ static void store_rx_sequential(XlnxVersalCANFDState *s, if (frame->flags & QEMU_CAN_FRMF_ESI) { dlc_reg_val |= FIELD_DP32(0, RB_DLC_REGISTER, ESI, 1); } - } else { - is_canfd_frame = false; - - if (frame->can_dlc > 8) { - dlc = 8; - } - - dlc_reg_val = FIELD_DP32(0, RB_DLC_REGISTER, DLC, dlc); } - dlc_reg_val |= FIELD_DP32(0, RB_DLC_REGISTER, FDF, is_canfd_frame); dlc_reg_val |= FIELD_DP32(0, RB_DLC_REGISTER, TIMESTAMP, rx_timestamp); dlc_reg_val |= FIELD_DP32(0, RB_DLC_REGISTER, MATCHED_FILTER_INDEX, filter_index);
Use QEMU's helper functions can_dlc2len() and can_len2dlc() for translating between the raw DLC value and the SocketCAN length value. This also has the side effect of correctly handling received CAN FD frames with a DLC of 0-8, which was broken previously. Signed-off-by: Doug Brown <doug@schmorgal.com> --- hw/net/can/xlnx-versal-canfd.c | 67 ++-------------------------------- 1 file changed, 4 insertions(+), 63 deletions(-)