| Message ID | 20170615121259.8281-3-linus.walleij@linaro.org |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Convert RPMB block device to a character device | expand |
On Thu, Jun 15, 2017 at 3:12 PM, Linus Walleij <linus.walleij@linaro.org> wrote: > > Instead of passing a struct mmc_blk_data * to mmc_blk_part_switch() > let's pass the actual partition type we want to switch to. This > is necessary in order not to have a block device with a backing > mmc_blk_data and request queue and all for every hardware partition, > such as RPMB. > > Signed-off-by: Linus Walleij <linus.walleij@linaro.org> > --- > drivers/mmc/core/block.c | 25 +++++++++++++------------ > 1 file changed, 13 insertions(+), 12 deletions(-) > > diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c > index d1b824e65590..94b97f97be1a 100644 > --- a/drivers/mmc/core/block.c > +++ b/drivers/mmc/core/block.c > @@ -127,7 +127,7 @@ module_param(perdev_minors, int, 0444); > MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device"); > > static inline int mmc_blk_part_switch(struct mmc_card *card, > - struct mmc_blk_data *md); > + unsigned int part_type); Maybe it's time to change this misleading 'part_type' name, this a bit that represent the actual partition to access and not a type of an partition. Maybe part_to_access will more reflect the spec wording. Need to change also in mmc_blk_data; > > > static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk) > { > @@ -490,7 +490,7 @@ static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md, > > mrq.cmd = &cmd; > > - err = mmc_blk_part_switch(card, md); > + err = mmc_blk_part_switch(card, md->part_type); > if (err) > return err; > > @@ -767,29 +767,29 @@ static int mmc_blk_part_switch_post(struct mmc_card *card, > } > > static inline int mmc_blk_part_switch(struct mmc_card *card, > - struct mmc_blk_data *md) > + unsigned int part_type) > { > int ret = 0; > struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev); > > - if (main_md->part_curr == md->part_type) > + if (main_md->part_curr == part_type) > return 0; > > if (mmc_card_mmc(card)) { > u8 part_config = card->ext_csd.part_config; > > - ret = mmc_blk_part_switch_pre(card, md->part_type); > + ret = mmc_blk_part_switch_pre(card, part_type); > if (ret) > return ret; > > part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK; > - part_config |= md->part_type; > + part_config |= part_type; > > ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, > EXT_CSD_PART_CONFIG, part_config, > card->ext_csd.part_time); > if (ret) { > - mmc_blk_part_switch_post(card, md->part_type); > + mmc_blk_part_switch_post(card, part_type); > return ret; > } > > @@ -798,7 +798,7 @@ static inline int mmc_blk_part_switch(struct mmc_card *card, > ret = mmc_blk_part_switch_post(card, main_md->part_curr); > } > > - main_md->part_curr = md->part_type; > + main_md->part_curr = part_type; > return ret; > } > > @@ -1141,7 +1141,7 @@ static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host, > int part_err; > > main_md->part_curr = main_md->part_type; > - part_err = mmc_blk_part_switch(host->card, md); > + part_err = mmc_blk_part_switch(host->card, md->part_type); > if (part_err) { > /* > * We have failed to get back into the correct > @@ -1180,6 +1180,7 @@ static void mmc_blk_issue_drv_op(struct mmc_queue *mq, struct request *req) > struct mmc_queue_req *mq_rq; > struct mmc_card *card = mq->card; > struct mmc_blk_data *md = mq->blkdata; > + struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev); Doesn't apply here, maybe need rebase over next or I'm missing some patches. > struct mmc_blk_ioc_data **idata; > u8 **ext_csd; > u32 status; > @@ -1198,7 +1199,7 @@ static void mmc_blk_issue_drv_op(struct mmc_queue *mq, struct request *req) > } > /* Always switch back to main area after RPMB access */ > if (md->area_type & MMC_BLK_DATA_AREA_RPMB) > - mmc_blk_part_switch(card, dev_get_drvdata(&card->dev)); > + mmc_blk_part_switch(card, main_md->part_type); Actually this switch back should be probably done for any partition which is not user data area. so this should be if (md->area_type != MMC_BLK_DATA_AREA_MAIN) > break; > case MMC_DRV_OP_BOOT_WP: > ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP, > @@ -1906,7 +1907,7 @@ void mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) > /* claim host only for the first request */ > mmc_get_card(card); > > - ret = mmc_blk_part_switch(card, md); > + ret = mmc_blk_part_switch(card, md->part_type); > if (ret) { > if (req) { > blk_end_request_all(req, -EIO); > @@ -2436,7 +2437,7 @@ static void mmc_blk_remove(struct mmc_card *card) > mmc_blk_remove_parts(card, md); > pm_runtime_get_sync(&card->dev); > mmc_claim_host(card->host); > - mmc_blk_part_switch(card, md); > + mmc_blk_part_switch(card, md->part_type); > mmc_release_host(card->host); > if (card->type != MMC_TYPE_SD_COMBO) > pm_runtime_disable(&card->dev); > -- > 2.9.4 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-mmc" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Mon, Jun 19, 2017 at 9:53 PM, Tomas Winkler <tomasw@gmail.com> wrote: > On Thu, Jun 15, 2017 at 3:12 PM, Linus Walleij <linus.walleij@linaro.org> wrote: >> >> Instead of passing a struct mmc_blk_data * to mmc_blk_part_switch() >> let's pass the actual partition type we want to switch to. This >> is necessary in order not to have a block device with a backing >> mmc_blk_data and request queue and all for every hardware partition, >> such as RPMB. >> >> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> >> --- >> drivers/mmc/core/block.c | 25 +++++++++++++------------ >> 1 file changed, 13 insertions(+), 12 deletions(-) >> >> diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c >> index d1b824e65590..94b97f97be1a 100644 >> --- a/drivers/mmc/core/block.c >> +++ b/drivers/mmc/core/block.c >> @@ -127,7 +127,7 @@ module_param(perdev_minors, int, 0444); >> MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device"); >> >> static inline int mmc_blk_part_switch(struct mmc_card *card, >> - struct mmc_blk_data *md); >> + unsigned int part_type); > > Maybe it's time to change this misleading 'part_type' name, this a bit > that represent the actual partition to > access and not a type of an partition. Maybe part_to_access will more > reflect the spec wording. > Need to change also in mmc_blk_data; That would be a separate patch I think (one patch, one technical step) what about target_partition or something? >> /* Always switch back to main area after RPMB access */ >> if (md->area_type & MMC_BLK_DATA_AREA_RPMB) >> - mmc_blk_part_switch(card, dev_get_drvdata(&card->dev)); >> + mmc_blk_part_switch(card, main_md->part_type); > > Actually this switch back should be probably done for any partition > which is not user data area. > so this should be > if (md->area_type != MMC_BLK_DATA_AREA_MAIN) That is another technical step so it should be a separate patch as well. Actually I think this code is broken in several ways, especially if you do something crazy like access the main partition, both boot partitions and the RPMB partition at the same time. It will invariably screw something up. I am trying to rework this to use the block layer properly, RPMB is just the first step... Yours, Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c index d1b824e65590..94b97f97be1a 100644 --- a/drivers/mmc/core/block.c +++ b/drivers/mmc/core/block.c @@ -127,7 +127,7 @@ module_param(perdev_minors, int, 0444); MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device"); static inline int mmc_blk_part_switch(struct mmc_card *card, - struct mmc_blk_data *md); + unsigned int part_type); static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk) { @@ -490,7 +490,7 @@ static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md, mrq.cmd = &cmd; - err = mmc_blk_part_switch(card, md); + err = mmc_blk_part_switch(card, md->part_type); if (err) return err; @@ -767,29 +767,29 @@ static int mmc_blk_part_switch_post(struct mmc_card *card, } static inline int mmc_blk_part_switch(struct mmc_card *card, - struct mmc_blk_data *md) + unsigned int part_type) { int ret = 0; struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev); - if (main_md->part_curr == md->part_type) + if (main_md->part_curr == part_type) return 0; if (mmc_card_mmc(card)) { u8 part_config = card->ext_csd.part_config; - ret = mmc_blk_part_switch_pre(card, md->part_type); + ret = mmc_blk_part_switch_pre(card, part_type); if (ret) return ret; part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK; - part_config |= md->part_type; + part_config |= part_type; ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG, part_config, card->ext_csd.part_time); if (ret) { - mmc_blk_part_switch_post(card, md->part_type); + mmc_blk_part_switch_post(card, part_type); return ret; } @@ -798,7 +798,7 @@ static inline int mmc_blk_part_switch(struct mmc_card *card, ret = mmc_blk_part_switch_post(card, main_md->part_curr); } - main_md->part_curr = md->part_type; + main_md->part_curr = part_type; return ret; } @@ -1141,7 +1141,7 @@ static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host, int part_err; main_md->part_curr = main_md->part_type; - part_err = mmc_blk_part_switch(host->card, md); + part_err = mmc_blk_part_switch(host->card, md->part_type); if (part_err) { /* * We have failed to get back into the correct @@ -1180,6 +1180,7 @@ static void mmc_blk_issue_drv_op(struct mmc_queue *mq, struct request *req) struct mmc_queue_req *mq_rq; struct mmc_card *card = mq->card; struct mmc_blk_data *md = mq->blkdata; + struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev); struct mmc_blk_ioc_data **idata; u8 **ext_csd; u32 status; @@ -1198,7 +1199,7 @@ static void mmc_blk_issue_drv_op(struct mmc_queue *mq, struct request *req) } /* Always switch back to main area after RPMB access */ if (md->area_type & MMC_BLK_DATA_AREA_RPMB) - mmc_blk_part_switch(card, dev_get_drvdata(&card->dev)); + mmc_blk_part_switch(card, main_md->part_type); break; case MMC_DRV_OP_BOOT_WP: ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP, @@ -1906,7 +1907,7 @@ void mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) /* claim host only for the first request */ mmc_get_card(card); - ret = mmc_blk_part_switch(card, md); + ret = mmc_blk_part_switch(card, md->part_type); if (ret) { if (req) { blk_end_request_all(req, -EIO); @@ -2436,7 +2437,7 @@ static void mmc_blk_remove(struct mmc_card *card) mmc_blk_remove_parts(card, md); pm_runtime_get_sync(&card->dev); mmc_claim_host(card->host); - mmc_blk_part_switch(card, md); + mmc_blk_part_switch(card, md->part_type); mmc_release_host(card->host); if (card->type != MMC_TYPE_SD_COMBO) pm_runtime_disable(&card->dev);
Instead of passing a struct mmc_blk_data * to mmc_blk_part_switch() let's pass the actual partition type we want to switch to. This is necessary in order not to have a block device with a backing mmc_blk_data and request queue and all for every hardware partition, such as RPMB. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> --- drivers/mmc/core/block.c | 25 +++++++++++++------------ 1 file changed, 13 insertions(+), 12 deletions(-) -- 2.9.4 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html