lkml.org 
[lkml]   [2007]   [Nov]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH 2/2] sata_nv: fix ATAPI issues with memory over 4GB (v3)
This fixes some problems with ATAPI devices on nForce4 controllers in ADMA mode
on systems with memory located above 4GB. We need to delay setting the 64-bit
DMA mask until the PRD table and padding buffer are allocated so that they don't
get allocated above 4GB and break legacy mode (which is needed for ATAPI
devices).

Signed-off-by: Robert Hancock <hancockr@shaw.ca>

--- linux-2.6.24-rc1-git10edit/drivers/ata/sata_nv.c.before 2007-11-13 19:04:18.000000000 -0600
+++ linux-2.6.24-rc1-git10edit/drivers/ata/sata_nv.c 2007-11-13 19:02:34.000000000 -0600
@@ -247,6 +247,7 @@
void __iomem *ctl_block;
void __iomem *gen_block;
void __iomem *notifier_clear_block;
+ u64 adma_dma_mask;
u8 flags;
int last_issue_ncq;
};
@@ -748,7 +749,7 @@
adma_enable = 0;
nv_adma_register_mode(ap);
} else {
- bounce_limit = *ap->dev->dma_mask;
+ bounce_limit = pp->adma_dma_mask;
segment_boundary = NV_ADMA_DMA_BOUNDARY;
sg_tablesize = NV_ADMA_SGTBL_TOTAL_LEN;
adma_enable = 1;
@@ -763,6 +764,11 @@
config_mask = NV_MCP_SATA_CFG_20_PORT0_EN |
NV_MCP_SATA_CFG_20_PORT0_PWB_EN;

+ /* Set appropriate DMA mask. */
+ rc = pci_set_dma_mask(pdev, bounce_limit);
+ if (rc)
+ return rc;
+
if (adma_enable) {
new_reg = current_reg | config_mask;
pp->flags &= ~NV_ADMA_ATAPI_SETUP_COMPLETE;
@@ -1134,6 +1140,7 @@
void *mem;
dma_addr_t mem_dma;
void __iomem *mmio;
+ struct pci_dev *pdev = to_pci_dev(dev);
u16 tmp;

VPRINTK("ENTER\n");
@@ -1153,6 +1160,14 @@
pp->notifier_clear_block = pp->gen_block +
NV_ADMA_NOTIFIER_CLEAR + (4 * ap->port_no);

+ /* Now that the legacy PRD and padding buffer are allocated we can
+ safely raise the DMA mask to allocate the CPB/APRD table. */
+ pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
+ pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
+ /* Store the mask that was actually used so we can restore it later
+ if needed */
+ pp->adma_dma_mask = *dev->dma_mask;
+
mem = dmam_alloc_coherent(dev, NV_ADMA_PORT_PRIV_DMA_SZ,
&mem_dma, GFP_KERNEL);
if (!mem)
@@ -2408,12 +2423,6 @@
hpriv->type = type;
host->private_data = hpriv;

- /* set 64bit dma masks, may fail */
- if (type == ADMA) {
- if (pci_set_dma_mask(pdev, DMA_64BIT_MASK) == 0)
- pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
- }
-
/* request and iomap NV_MMIO_BAR */
rc = pcim_iomap_regions(pdev, 1 << NV_MMIO_BAR, DRV_NAME);
if (rc)
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-11-14 05:21    [W:0.065 / U:1.752 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site