libata: eliminate the home grown dma padding in favour of

[linux-2.6-omap-h63xx.git] / include / linux / libata.h

diff --git a/include/linux/libata.h b/include/linux/libata.h
index bc5a8d0c70902803fe63d4d6b3104e75bfa9c34e..2e098f940cec74083142d07a017522261b526c5e 100644 (file)
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -278,7 +278,6 @@ enum {
 
        /* size of buffer to pad xfers ending on unaligned boundaries */
        ATA_DMA_PAD_SZ          = 4,
-       ATA_DMA_PAD_BUF_SZ      = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
 
        /* ering size */
        ATA_ERING_SIZE          = 32,
@@ -457,24 +456,18 @@ struct ata_queued_cmd {
        unsigned long           flags;          /* ATA_QCFLAG_xxx */
        unsigned int            tag;
        unsigned int            n_elem;
-       unsigned int            mapped_n_elem;
 
        int                     dma_dir;
 
-       unsigned int            pad_len;
        unsigned int            sect_size;
 
        unsigned int            nbytes;
-       unsigned int            raw_nbytes;
        unsigned int            curbytes;
 
        struct scatterlist      *cursg;
        unsigned int            cursg_ofs;
 
-       struct scatterlist      *last_sg;
-       struct scatterlist      saved_last_sg;
        struct scatterlist      sgent;
-       struct scatterlist      extra_sg[2];
 
        struct scatterlist      *sg;
 
@@ -619,9 +612,6 @@ struct ata_port {
        struct ata_prd          *prd;    /* our SG list */
        dma_addr_t              prd_dma; /* and its DMA mapping */
 
-       void                    *pad;   /* array of DMA pad buffers */
-       dma_addr_t              pad_dma;
-
        struct ata_ioports      ioaddr; /* ATA cmd/ctl/dma register blocks */
 
        u8                      ctl;    /* cache of ATA control register */
@@ -1363,12 +1353,9 @@ static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
        qc->flags = 0;
        qc->cursg = NULL;
        qc->cursg_ofs = 0;
-       qc->nbytes = qc->raw_nbytes = qc->curbytes = 0;
+       qc->nbytes = qc->curbytes = 0;
        qc->n_elem = 0;
-       qc->mapped_n_elem = 0;
        qc->err_mask = 0;
-       qc->pad_len = 0;
-       qc->last_sg = NULL;
        qc->sect_size = ATA_SECT_SIZE;
 
        ata_tf_init(qc->dev, &qc->tf);
@@ -1423,19 +1410,6 @@ static inline unsigned int __ac_err_mask(u8 status)
        return mask;
 }
 
-static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
-{
-       ap->pad_dma = 0;
-       ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
-                                     &ap->pad_dma, GFP_KERNEL);
-       return (ap->pad == NULL) ? -ENOMEM : 0;
-}
-
-static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
-{
-       dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
-}
-
 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
 {
        return *(struct ata_port **)&host->hostdata[0];