[HIFN]: Move command descriptor setup to seperate function
Patrick McHardy [Wed, 7 May 2008 14:36:54 +0000 (22:36 +0800)]
Move command descriptor setup to seperate function as preparation
for the following DMA setup fixes.

Note 1: also fix a harmless typo while moving it: sa_idx is initialized
to dma->resi instead of dma->cmdi.

Note 2: errors from command descriptor setup are not propagated back,
anymore, they can't be handled anyway and all conditions leading
to errors should be checked earlier.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Acked-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/hifn_795x.c

index d6f0423..c9fe18d 100644 (file)
@@ -1168,109 +1168,15 @@ static int hifn_setup_crypto_command(struct hifn_device *dev,
        return cmd_len;
 }
 
-static int hifn_setup_src_desc(struct hifn_device *dev, struct page *page,
-               unsigned int offset, unsigned int size)
-{
-       struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
-       int idx;
-       dma_addr_t addr;
-
-       addr = pci_map_page(dev->pdev, page, offset, size, PCI_DMA_TODEVICE);
-
-       idx = dma->srci;
-
-       dma->srcr[idx].p = __cpu_to_le32(addr);
-       dma->srcr[idx].l = __cpu_to_le32(size | HIFN_D_VALID |
-                       HIFN_D_MASKDONEIRQ | HIFN_D_NOINVALID | HIFN_D_LAST);
-
-       if (++idx == HIFN_D_SRC_RSIZE) {
-               dma->srcr[idx].l = __cpu_to_le32(HIFN_D_VALID |
-                               HIFN_D_JUMP |
-                               HIFN_D_MASKDONEIRQ | HIFN_D_LAST);
-               idx = 0;
-       }
-
-       dma->srci = idx;
-       dma->srcu++;
-
-       if (!(dev->flags & HIFN_FLAG_SRC_BUSY)) {
-               hifn_write_1(dev, HIFN_1_DMA_CSR, HIFN_DMACSR_S_CTRL_ENA);
-               dev->flags |= HIFN_FLAG_SRC_BUSY;
-       }
-
-       return size;
-}
-
-static void hifn_setup_res_desc(struct hifn_device *dev)
-{
-       struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
-
-       dma->resr[dma->resi].l = __cpu_to_le32(HIFN_USED_RESULT |
-                       HIFN_D_VALID | HIFN_D_LAST);
-       /*
-        * dma->resr[dma->resi].l = __cpu_to_le32(HIFN_MAX_RESULT | HIFN_D_VALID |
-        *                                      HIFN_D_LAST | HIFN_D_NOINVALID);
-        */
-
-       if (++dma->resi == HIFN_D_RES_RSIZE) {
-               dma->resr[HIFN_D_RES_RSIZE].l = __cpu_to_le32(HIFN_D_VALID |
-                               HIFN_D_JUMP | HIFN_D_MASKDONEIRQ | HIFN_D_LAST);
-               dma->resi = 0;
-       }
-
-       dma->resu++;
-
-       if (!(dev->flags & HIFN_FLAG_RES_BUSY)) {
-               hifn_write_1(dev, HIFN_1_DMA_CSR, HIFN_DMACSR_R_CTRL_ENA);
-               dev->flags |= HIFN_FLAG_RES_BUSY;
-       }
-}
-
-static void hifn_setup_dst_desc(struct hifn_device *dev, struct page *page,
-               unsigned offset, unsigned size)
-{
-       struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
-       int idx;
-       dma_addr_t addr;
-
-       addr = pci_map_page(dev->pdev, page, offset, size, PCI_DMA_FROMDEVICE);
-
-       idx = dma->dsti;
-       dma->dstr[idx].p = __cpu_to_le32(addr);
-       dma->dstr[idx].l = __cpu_to_le32(size | HIFN_D_VALID |
-                       HIFN_D_MASKDONEIRQ | HIFN_D_NOINVALID | HIFN_D_LAST);
-
-       if (++idx == HIFN_D_DST_RSIZE) {
-               dma->dstr[idx].l = __cpu_to_le32(HIFN_D_VALID |
-                               HIFN_D_JUMP | HIFN_D_MASKDONEIRQ |
-                               HIFN_D_LAST | HIFN_D_NOINVALID);
-               idx = 0;
-       }
-       dma->dsti = idx;
-       dma->dstu++;
-
-       if (!(dev->flags & HIFN_FLAG_DST_BUSY)) {
-               hifn_write_1(dev, HIFN_1_DMA_CSR, HIFN_DMACSR_D_CTRL_ENA);
-               dev->flags |= HIFN_FLAG_DST_BUSY;
-       }
-}
-
-static int hifn_setup_dma(struct hifn_device *dev, struct page *spage, unsigned int soff,
-               struct page *dpage, unsigned int doff, unsigned int nbytes, void *priv,
-               struct hifn_context *ctx)
+static int hifn_setup_cmd_desc(struct hifn_device *dev,
+               struct hifn_context *ctx, void *priv, unsigned int nbytes)
 {
        struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
        int cmd_len, sa_idx;
        u8 *buf, *buf_pos;
        u16 mask;
 
-       dprintk("%s: spage: %p, soffset: %u, dpage: %p, doffset: %u, nbytes: %u, priv: %p, ctx: %p.\n",
-                       dev->name, spage, soff, dpage, doff, nbytes, priv, ctx);
-
-       sa_idx = dma->resi;
-
-       hifn_setup_src_desc(dev, spage, soff, nbytes);
-
+       sa_idx = dma->cmdi;
        buf_pos = buf = dma->command_bufs[dma->cmdi];
 
        mask = 0;
@@ -1372,16 +1278,113 @@ static int hifn_setup_dma(struct hifn_device *dev, struct page *spage, unsigned
                hifn_write_1(dev, HIFN_1_DMA_CSR, HIFN_DMACSR_C_CTRL_ENA);
                dev->flags |= HIFN_FLAG_CMD_BUSY;
        }
-
-       hifn_setup_dst_desc(dev, dpage, doff, nbytes);
-       hifn_setup_res_desc(dev);
-
        return 0;
 
 err_out:
        return -EINVAL;
 }
 
+static int hifn_setup_src_desc(struct hifn_device *dev, struct page *page,
+               unsigned int offset, unsigned int size)
+{
+       struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
+       int idx;
+       dma_addr_t addr;
+
+       addr = pci_map_page(dev->pdev, page, offset, size, PCI_DMA_TODEVICE);
+
+       idx = dma->srci;
+
+       dma->srcr[idx].p = __cpu_to_le32(addr);
+       dma->srcr[idx].l = __cpu_to_le32(size | HIFN_D_VALID |
+                       HIFN_D_MASKDONEIRQ | HIFN_D_NOINVALID | HIFN_D_LAST);
+
+       if (++idx == HIFN_D_SRC_RSIZE) {
+               dma->srcr[idx].l = __cpu_to_le32(HIFN_D_VALID |
+                               HIFN_D_JUMP |
+                               HIFN_D_MASKDONEIRQ | HIFN_D_LAST);
+               idx = 0;
+       }
+
+       dma->srci = idx;
+       dma->srcu++;
+
+       if (!(dev->flags & HIFN_FLAG_SRC_BUSY)) {
+               hifn_write_1(dev, HIFN_1_DMA_CSR, HIFN_DMACSR_S_CTRL_ENA);
+               dev->flags |= HIFN_FLAG_SRC_BUSY;
+       }
+
+       return size;
+}
+
+static void hifn_setup_res_desc(struct hifn_device *dev)
+{
+       struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
+
+       dma->resr[dma->resi].l = __cpu_to_le32(HIFN_USED_RESULT |
+                       HIFN_D_VALID | HIFN_D_LAST);
+       /*
+        * dma->resr[dma->resi].l = __cpu_to_le32(HIFN_MAX_RESULT | HIFN_D_VALID |
+        *                                      HIFN_D_LAST | HIFN_D_NOINVALID);
+        */
+
+       if (++dma->resi == HIFN_D_RES_RSIZE) {
+               dma->resr[HIFN_D_RES_RSIZE].l = __cpu_to_le32(HIFN_D_VALID |
+                               HIFN_D_JUMP | HIFN_D_MASKDONEIRQ | HIFN_D_LAST);
+               dma->resi = 0;
+       }
+
+       dma->resu++;
+
+       if (!(dev->flags & HIFN_FLAG_RES_BUSY)) {
+               hifn_write_1(dev, HIFN_1_DMA_CSR, HIFN_DMACSR_R_CTRL_ENA);
+               dev->flags |= HIFN_FLAG_RES_BUSY;
+       }
+}
+
+static void hifn_setup_dst_desc(struct hifn_device *dev, struct page *page,
+               unsigned offset, unsigned size)
+{
+       struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
+       int idx;
+       dma_addr_t addr;
+
+       addr = pci_map_page(dev->pdev, page, offset, size, PCI_DMA_FROMDEVICE);
+
+       idx = dma->dsti;
+       dma->dstr[idx].p = __cpu_to_le32(addr);
+       dma->dstr[idx].l = __cpu_to_le32(size | HIFN_D_VALID |
+                       HIFN_D_MASKDONEIRQ | HIFN_D_NOINVALID | HIFN_D_LAST);
+
+       if (++idx == HIFN_D_DST_RSIZE) {
+               dma->dstr[idx].l = __cpu_to_le32(HIFN_D_VALID |
+                               HIFN_D_JUMP | HIFN_D_MASKDONEIRQ |
+                               HIFN_D_LAST | HIFN_D_NOINVALID);
+               idx = 0;
+       }
+       dma->dsti = idx;
+       dma->dstu++;
+
+       if (!(dev->flags & HIFN_FLAG_DST_BUSY)) {
+               hifn_write_1(dev, HIFN_1_DMA_CSR, HIFN_DMACSR_D_CTRL_ENA);
+               dev->flags |= HIFN_FLAG_DST_BUSY;
+       }
+}
+
+static int hifn_setup_dma(struct hifn_device *dev, struct page *spage, unsigned int soff,
+               struct page *dpage, unsigned int doff, unsigned int nbytes, void *priv,
+               struct hifn_context *ctx)
+{
+       dprintk("%s: spage: %p, soffset: %u, dpage: %p, doffset: %u, nbytes: %u, priv: %p, ctx: %p.\n",
+                       dev->name, spage, soff, dpage, doff, nbytes, priv, ctx);
+
+       hifn_setup_src_desc(dev, spage, soff, nbytes);
+       hifn_setup_cmd_desc(dev, ctx, priv, nbytes);
+       hifn_setup_dst_desc(dev, dpage, doff, nbytes);
+       hifn_setup_res_desc(dev);
+       return 0;
+}
+
 static int ablkcipher_walk_init(struct ablkcipher_walk *w,
                int num, gfp_t gfp_flags)
 {