| Message ID | 20240703085148.66188-3-philmd@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | hw/sd/sdcard: Cleanups before adding eMMC support | expand |
On 3/7/24 10:51, Philippe Mathieu-Daudé wrote: > "General command" (GEN_CMD, CMD56) is described as: > > GEN_CMD is the same as the single block read or write > commands (CMD24 or CMD17). The difference is that [...] > the data block is not a memory payload data but has a > vendor specific format and meaning. > > Thus this block must not be stored overwriting data block > on underlying storage drive. Keep it in a dedicated > 'vendor_data[]' array. > > Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> > --- > v43: Do not re-use VMSTATE_UNUSED_V (danpb) > v44: Use subsection (Luc) > --- > hw/sd/sd.c | 26 +++++++++++++++++++------- > 1 file changed, 19 insertions(+), 7 deletions(-) > > diff --git a/hw/sd/sd.c b/hw/sd/sd.c > index 808dc1cea6..000b923c73 100644 > --- a/hw/sd/sd.c > +++ b/hw/sd/sd.c > @@ -153,6 +153,8 @@ struct SDState { > uint32_t data_offset; > size_t data_size; > uint8_t data[512]; > + uint8_t vendor_data[512]; > + > qemu_irq readonly_cb; > qemu_irq inserted_cb; > QEMUTimer *ocr_power_timer; > @@ -719,6 +721,7 @@ static void sd_reset(DeviceState *dev) > sd->wp_switch = sd->blk ? !blk_is_writable(sd->blk) : false; > sd->wp_group_bits = sect; > sd->wp_group_bmap = bitmap_new(sd->wp_group_bits); > + memset(sd->vendor_data, 0xec, sizeof(sd->vendor_data)); > memset(sd->function_group, 0, sizeof(sd->function_group)); > sd->erase_start = INVALID_ADDRESS; > sd->erase_end = INVALID_ADDRESS; > @@ -793,6 +796,16 @@ static const VMStateDescription sd_ocr_vmstate = { > }, > }; > > +static const VMStateDescription sd_vendordata_vmstate = { > + .name = "sd-card/vendor_data-state", > + .version_id = 1, > + .minimum_version_id = 1, > + .fields = (const VMStateField[]) { > + VMSTATE_UINT8_ARRAY(vendor_data, SDState, 512), > + VMSTATE_END_OF_LIST() > + }, > +}; > + > static int sd_vmstate_pre_load(void *opaque) > { > SDState *sd = opaque; > @@ -840,6 +853,7 @@ static const VMStateDescription sd_vmstate = { > }, > .subsections = (const VMStateDescription * const []) { > &sd_ocr_vmstate, > + &sd_vendordata_vmstate, > NULL > }, > }; Sigh, forgot to squash: -- >8 -- @@ -919,3 +918,0 @@ static void sd_blk_write(SDState *sd, uint64_t addr, uint32_t len) -#define APP_READ_BLOCK(a, len) memset(sd->data, 0xec, len) -#define APP_WRITE_BLOCK(a, len) - --- > @@ -2187,9 +2201,8 @@ void sd_write_byte(SDState *sd, uint8_t value) > break; > > case 56: /* CMD56: GEN_CMD */ > - sd->data[sd->data_offset ++] = value; > - if (sd->data_offset >= sd->blk_len) { > - APP_WRITE_BLOCK(sd->data_start, sd->data_offset); > + sd->vendor_data[sd->data_offset++] = value; > + if (sd->data_offset >= sizeof(sd->vendor_data)) { > sd->state = sd_transfer_state; > } > break; > @@ -2261,12 +2274,11 @@ uint8_t sd_read_byte(SDState *sd) > break; > > case 56: /* CMD56: GEN_CMD */ > - if (sd->data_offset == 0) > - APP_READ_BLOCK(sd->data_start, sd->blk_len); > - ret = sd->data[sd->data_offset ++]; > + ret = sd->vendor_data[sd->data_offset++]; > > - if (sd->data_offset >= sd->blk_len) > + if (sd->data_offset >= sizeof(sd->vendor_data)) { > sd->state = sd_transfer_state; > + } > break; > > default:
diff --git a/hw/sd/sd.c b/hw/sd/sd.c index 808dc1cea6..000b923c73 100644 --- a/hw/sd/sd.c +++ b/hw/sd/sd.c @@ -153,6 +153,8 @@ struct SDState { uint32_t data_offset; size_t data_size; uint8_t data[512]; + uint8_t vendor_data[512]; + qemu_irq readonly_cb; qemu_irq inserted_cb; QEMUTimer *ocr_power_timer; @@ -719,6 +721,7 @@ static void sd_reset(DeviceState *dev) sd->wp_switch = sd->blk ? !blk_is_writable(sd->blk) : false; sd->wp_group_bits = sect; sd->wp_group_bmap = bitmap_new(sd->wp_group_bits); + memset(sd->vendor_data, 0xec, sizeof(sd->vendor_data)); memset(sd->function_group, 0, sizeof(sd->function_group)); sd->erase_start = INVALID_ADDRESS; sd->erase_end = INVALID_ADDRESS; @@ -793,6 +796,16 @@ static const VMStateDescription sd_ocr_vmstate = { }, }; +static const VMStateDescription sd_vendordata_vmstate = { + .name = "sd-card/vendor_data-state", + .version_id = 1, + .minimum_version_id = 1, + .fields = (const VMStateField[]) { + VMSTATE_UINT8_ARRAY(vendor_data, SDState, 512), + VMSTATE_END_OF_LIST() + }, +}; + static int sd_vmstate_pre_load(void *opaque) { SDState *sd = opaque; @@ -840,6 +853,7 @@ static const VMStateDescription sd_vmstate = { }, .subsections = (const VMStateDescription * const []) { &sd_ocr_vmstate, + &sd_vendordata_vmstate, NULL }, }; @@ -2187,9 +2201,8 @@ void sd_write_byte(SDState *sd, uint8_t value) break; case 56: /* CMD56: GEN_CMD */ - sd->data[sd->data_offset ++] = value; - if (sd->data_offset >= sd->blk_len) { - APP_WRITE_BLOCK(sd->data_start, sd->data_offset); + sd->vendor_data[sd->data_offset++] = value; + if (sd->data_offset >= sizeof(sd->vendor_data)) { sd->state = sd_transfer_state; } break; @@ -2261,12 +2274,11 @@ uint8_t sd_read_byte(SDState *sd) break; case 56: /* CMD56: GEN_CMD */ - if (sd->data_offset == 0) - APP_READ_BLOCK(sd->data_start, sd->blk_len); - ret = sd->data[sd->data_offset ++]; + ret = sd->vendor_data[sd->data_offset++]; - if (sd->data_offset >= sd->blk_len) + if (sd->data_offset >= sizeof(sd->vendor_data)) { sd->state = sd_transfer_state; + } break; default:
"General command" (GEN_CMD, CMD56) is described as: GEN_CMD is the same as the single block read or write commands (CMD24 or CMD17). The difference is that [...] the data block is not a memory payload data but has a vendor specific format and meaning. Thus this block must not be stored overwriting data block on underlying storage drive. Keep it in a dedicated 'vendor_data[]' array. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> --- v43: Do not re-use VMSTATE_UNUSED_V (danpb) v44: Use subsection (Luc) --- hw/sd/sd.c | 26 +++++++++++++++++++------- 1 file changed, 19 insertions(+), 7 deletions(-)