| Message ID | 20150609162715.21910.77696.stgit@dwillia2-desk3.amr.corp.intel.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
On Tue, Jun 09, 2015 at 12:27:15PM -0400, Dan Williams wrote: > > +#define scatterwalk_sg_chain(prv, num, sgl) sg_chain(prv, num, sgl) > +#define scatterwalk_sg_next(sgl) sg_next(sgl) Why are you reintroducing the scatterwalk_sg_next macro that we just removed? I also don't understand why this is so urgent that it has to go into mainline at this late date. Cheers,
On Wed, Jun 10, 2015 at 01:38:04PM +0800, Herbert Xu wrote: > On Tue, Jun 09, 2015 at 12:27:15PM -0400, Dan Williams wrote: > > > > +#define scatterwalk_sg_chain(prv, num, sgl) sg_chain(prv, num, sgl) > > +#define scatterwalk_sg_next(sgl) sg_next(sgl) > > Why are you reintroducing the scatterwalk_sg_next macro that we > just removed? > > I also don't understand why this is so urgent that it has to go > into mainline at this late date. It allows getting a cleaner slate for the next merge window, which seems useful on it's own. The re-addition of scatterwalk_sg_next seems next, but getting rid of the open-coded sg_chain is useful. Maybe you can take it through the crypto tree and also kill off the scatterwalk_sg_chain name as well while we're at it? -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Thu, Jun 11, 2015 at 09:31:07AM +0200, Christoph Hellwig wrote: > > It allows getting a cleaner slate for the next merge window, which seems > useful on it's own. The re-addition of scatterwalk_sg_next seems next, > but getting rid of the open-coded sg_chain is useful. Sure I can take the crypto bits. > Maybe you can take it through the crypto tree and also kill off the > scatterwalk_sg_chain name as well while we're at it? Sure I'm happy to take such a patch. Cheers,
diff --git a/block/blk-merge.c b/block/blk-merge.c index fd3fee81c23c..7bb4f260ca4b 100644 --- a/block/blk-merge.c +++ b/block/blk-merge.c @@ -266,7 +266,7 @@ int blk_rq_map_sg(struct request_queue *q, struct request *rq, if (rq->cmd_flags & REQ_WRITE) memset(q->dma_drain_buffer, 0, q->dma_drain_size); - sg->page_link &= ~0x02; + sg_unmark_end(sg); sg = sg_next(sg); sg_set_page(sg, virt_to_page(q->dma_drain_buffer), q->dma_drain_size, diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c index 4d63e0d4da9a..df8b23e19b90 100644 --- a/drivers/crypto/omap-sham.c +++ b/drivers/crypto/omap-sham.c @@ -582,7 +582,7 @@ static int omap_sham_xmit_dma(struct omap_sham_dev *dd, dma_addr_t dma_addr, * the dmaengine may try to DMA the incorrect amount of data. */ sg_init_table(&ctx->sgl, 1); - ctx->sgl.page_link = ctx->sg->page_link; + sg_assign_page(&ctx->sgl, sg_page(ctx->sg)); ctx->sgl.offset = ctx->sg->offset; sg_dma_len(&ctx->sgl) = len32; sg_dma_address(&ctx->sgl) = sg_dma_address(ctx->sg); diff --git a/drivers/dma/imx-dma.c b/drivers/dma/imx-dma.c index eed405976ea9..081fbfc87f6b 100644 --- a/drivers/dma/imx-dma.c +++ b/drivers/dma/imx-dma.c @@ -886,18 +886,14 @@ static struct dma_async_tx_descriptor *imxdma_prep_dma_cyclic( sg_init_table(imxdmac->sg_list, periods); for (i = 0; i < periods; i++) { - imxdmac->sg_list[i].page_link = 0; - imxdmac->sg_list[i].offset = 0; + sg_set_page(&imxdmac->sg_list[i], NULL, period_len, 0); imxdmac->sg_list[i].dma_address = dma_addr; sg_dma_len(&imxdmac->sg_list[i]) = period_len; dma_addr += period_len; } /* close the loop */ - imxdmac->sg_list[periods].offset = 0; - sg_dma_len(&imxdmac->sg_list[periods]) = 0; - imxdmac->sg_list[periods].page_link = - ((unsigned long)imxdmac->sg_list | 0x01) & ~0x02; + sg_chain(imxdmac->sg_list, periods + 1, imxdmac->sg_list); desc->type = IMXDMA_DESC_CYCLIC; desc->sg = imxdmac->sg_list; diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c index 3c10f034d4b9..e8c00642cacb 100644 --- a/drivers/dma/ste_dma40.c +++ b/drivers/dma/ste_dma40.c @@ -2562,10 +2562,7 @@ dma40_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t dma_addr, dma_addr += period_len; } - sg[periods].offset = 0; - sg_dma_len(&sg[periods]) = 0; - sg[periods].page_link = - ((unsigned long)sg | 0x01) & ~0x02; + sg_chain(sg, periods + 1, sg); txd = d40_prep_sg(chan, sg, sg, periods, direction, DMA_PREP_INTERRUPT); diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c index 8efa3684aef8..fa525ee20470 100644 --- a/drivers/mmc/card/queue.c +++ b/drivers/mmc/card/queue.c @@ -469,7 +469,7 @@ static unsigned int mmc_queue_packed_map_sg(struct mmc_queue *mq, sg_set_buf(__sg, buf + offset, len); offset += len; remain -= len; - (__sg++)->page_link &= ~0x02; + sg_unmark_end(__sg++); sg_len++; } while (remain); } @@ -477,7 +477,7 @@ static unsigned int mmc_queue_packed_map_sg(struct mmc_queue *mq, list_for_each_entry(req, &packed->list, queuelist) { sg_len += blk_rq_map_sg(mq->queue, req, __sg); __sg = sg + (sg_len - 1); - (__sg++)->page_link &= ~0x02; + sg_unmark_end(__sg++); } sg_mark_end(sg + (sg_len - 1)); return sg_len; diff --git a/include/crypto/scatterwalk.h b/include/crypto/scatterwalk.h index 20e4226a2e14..4529889b0f07 100644 --- a/include/crypto/scatterwalk.h +++ b/include/crypto/scatterwalk.h @@ -25,13 +25,8 @@ #include <linux/scatterlist.h> #include <linux/sched.h> -static inline void scatterwalk_sg_chain(struct scatterlist *sg1, int num, - struct scatterlist *sg2) -{ - sg_set_page(&sg1[num - 1], (void *)sg2, 0, 0); - sg1[num - 1].page_link &= ~0x02; - sg1[num - 1].page_link |= 0x01; -} +#define scatterwalk_sg_chain(prv, num, sgl) sg_chain(prv, num, sgl) +#define scatterwalk_sg_next(sgl) sg_next(sgl) static inline void scatterwalk_crypto_chain(struct scatterlist *head, struct scatterlist *sg,
Replace open coded sg_chain() and sg_unmark_end() instances with the aforementioned helpers. Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Christoph Hellwig <hch@lst.de> Cc: Vinod Koul <vinod.koul@intel.com> Cc: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Dan Williams <dan.j.williams@intel.com> --- block/blk-merge.c | 2 +- drivers/crypto/omap-sham.c | 2 +- drivers/dma/imx-dma.c | 8 ++------ drivers/dma/ste_dma40.c | 5 +---- drivers/mmc/card/queue.c | 4 ++-- include/crypto/scatterwalk.h | 9 ++------- 6 files changed, 9 insertions(+), 21 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html