diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/ata/sata_mv.c | 102 |
1 files changed, 70 insertions, 32 deletions
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c index d15caf32045..1c53c8a7d21 100644 --- a/drivers/ata/sata_mv.c +++ b/drivers/ata/sata_mv.c @@ -107,14 +107,12 @@ enum { /* CRQB needs alignment on a 1KB boundary. Size == 1KB * CRPB needs alignment on a 256B boundary. Size == 256B - * SG count of 176 leads to MV_PORT_PRIV_DMA_SZ == 4KB * ePRD (SG) entries need alignment on a 16B boundary. Size == 16B */ MV_CRQB_Q_SZ = (32 * MV_MAX_Q_DEPTH), MV_CRPB_Q_SZ = (8 * MV_MAX_Q_DEPTH), - MV_MAX_SG_CT = 176, + MV_MAX_SG_CT = 256, MV_SG_TBL_SZ = (16 * MV_MAX_SG_CT), - MV_PORT_PRIV_DMA_SZ = (MV_CRQB_Q_SZ + MV_CRPB_Q_SZ + MV_SG_TBL_SZ), MV_PORTS_PER_HC = 4, /* == (port / MV_PORTS_PER_HC) to determine HC from 0-7 port */ @@ -421,6 +419,14 @@ struct mv_host_priv { u32 irq_cause_ofs; u32 irq_mask_ofs; u32 unmask_all_irqs; + /* + * These consistent DMA memory pools give us guaranteed + * alignment for hardware-accessed data structures, + * and less memory waste in accomplishing the alignment. + */ + struct dma_pool *crqb_pool; + struct dma_pool *crpb_pool; + struct dma_pool *sg_tbl_pool; }; struct mv_hw_ops { @@ -1097,6 +1103,25 @@ static void mv_edma_cfg(struct mv_port_priv *pp, struct mv_host_priv *hpriv, writelfl(cfg, port_mmio + EDMA_CFG_OFS); } +static void mv_port_free_dma_mem(struct ata_port *ap) +{ + struct mv_host_priv *hpriv = ap->host->private_data; + struct mv_port_priv *pp = ap->private_data; + + if (pp->crqb) { + dma_pool_free(hpriv->crqb_pool, pp->crqb, pp->crqb_dma); + pp->crqb = NULL; + } + if (pp->crpb) { + dma_pool_free(hpriv->crpb_pool, pp->crpb, pp->crpb_dma); + pp->crpb = NULL; + } + if (pp->sg_tbl) { + dma_pool_free(hpriv->sg_tbl_pool, pp->sg_tbl, pp->sg_tbl_dma); + pp->sg_tbl = NULL; + } +} + /** * mv_port_start - Port specific init/start routine. * @ap: ATA channel to manipulate @@ -1113,51 +1138,36 @@ static int mv_port_start(struct ata_port *ap) struct mv_host_priv *hpriv = ap->host->private_data; struct mv_port_priv *pp; void __iomem *port_mmio = mv_ap_base(ap); - void *mem; - dma_addr_t mem_dma; unsigned long flags; int rc; pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL); if (!pp) return -ENOMEM; - - mem = dmam_alloc_coherent(dev, MV_PORT_PRIV_DMA_SZ, &mem_dma, - GFP_KERNEL); - if (!mem) - return -ENOMEM; - memset(mem, 0, MV_PORT_PRIV_DMA_SZ); + ap->private_data = pp; rc = ata_pad_alloc(ap, dev); if (rc) return rc; - /* First item in chunk of DMA memory: - * 32-slot command request table (CRQB), 32 bytes each in size - */ - pp->crqb = mem; - pp->crqb_dma = mem_dma; - mem += MV_CRQB_Q_SZ; - mem_dma += MV_CRQB_Q_SZ; + pp->crqb = dma_pool_alloc(hpriv->crqb_pool, GFP_KERNEL, &pp->crqb_dma); + if (!pp->crqb) + return -ENOMEM; + memset(pp->crqb, 0, MV_CRQB_Q_SZ); - /* Second item: - * 32-slot command response table (CRPB), 8 bytes each in size - */ - pp->crpb = mem; - pp->crpb_dma = mem_dma; - mem += MV_CRPB_Q_SZ; - mem_dma += MV_CRPB_Q_SZ; + pp->crpb = dma_pool_alloc(hpriv->crpb_pool, GFP_KERNEL, &pp->crpb_dma); + if (!pp->crpb) + goto out_port_free_dma_mem; + memset(pp->crpb, 0, MV_CRPB_Q_SZ); - /* Third item: - * Table of scatter-gather descriptors (ePRD), 16 bytes each - */ - pp->sg_tbl = mem; - pp->sg_tbl_dma = mem_dma; + pp->sg_tbl = dma_pool_alloc(hpriv->sg_tbl_pool, GFP_KERNEL, + &pp->sg_tbl_dma); + if (!pp->sg_tbl) + goto out_port_free_dma_mem; spin_lock_irqsave(&ap->host->lock, flags); mv_edma_cfg(pp, hpriv, port_mmio, 0); - mv_set_edma_ptrs(port_mmio, hpriv, pp); spin_unlock_irqrestore(&ap->host->lock, flags); @@ -1166,8 +1176,11 @@ static int mv_port_start(struct ata_port *ap) * we'll be unable to send non-data, PIO, etc due to restricted access * to shadow regs. */ - ap->private_data = pp; return 0; + +out_port_free_dma_mem: + mv_port_free_dma_mem(ap); + return -ENOMEM; } /** @@ -1182,6 +1195,7 @@ static int mv_port_start(struct ata_port *ap) static void mv_port_stop(struct ata_port *ap) { mv_stop_dma(ap); + mv_port_free_dma_mem(ap); } /** @@ -2765,6 +2779,26 @@ static void mv_print_info(struct ata_host *host) scc_s, (MV_HP_FLAG_MSI & hpriv->hp_flags) ? "MSI" : "INTx"); } +static int mv_create_dma_pools(struct mv_host_priv *hpriv, struct device *dev) +{ + hpriv->crqb_pool = dmam_pool_create("crqb_q", dev, MV_CRQB_Q_SZ, + MV_CRQB_Q_SZ, 0); + if (!hpriv->crqb_pool) + return -ENOMEM; + + hpriv->crpb_pool = dmam_pool_create("crpb_q", dev, MV_CRPB_Q_SZ, + MV_CRPB_Q_SZ, 0); + if (!hpriv->crpb_pool) + return -ENOMEM; + + hpriv->sg_tbl_pool = dmam_pool_create("sg_tbl", dev, MV_SG_TBL_SZ, + MV_SG_TBL_SZ, 0); + if (!hpriv->sg_tbl_pool) + return -ENOMEM; + + return 0; +} + /** * mv_init_one - handle a positive probe of a Marvell host * @pdev: PCI device found @@ -2810,6 +2844,10 @@ static int mv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) if (rc) return rc; + rc = mv_create_dma_pools(hpriv, &pdev->dev); + if (rc) + return rc; + /* initialize adapter */ rc = mv_init_host(host, board_idx); if (rc) |