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Subject[patch 13/35] ISDN: Fix DMA alloc for hfcpci
2.6.29-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Karsten Keil <keil@b1-systems.de>

commit 8a745b9d91962991ce87a649a4dc3af3206c2c8b upstream.

Replace wrong code with correct DMA API functions.

Signed-off-by: Karsten Keil <keil@b1-systems.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
drivers/isdn/hisax/hfc_pci.c | 41 ++++++++++++++++++++++++++++++-----------
drivers/isdn/hisax/hisax.h | 2 +-
2 files changed, 31 insertions(+), 12 deletions(-)

--- a/drivers/isdn/hisax/hfc_pci.c
+++ b/drivers/isdn/hisax/hfc_pci.c
@@ -82,8 +82,9 @@ release_io_hfcpci(struct IsdnCardState *
Write_hfc(cs, HFCPCI_INT_M2, cs->hw.hfcpci.int_m2);
pci_write_config_word(cs->hw.hfcpci.dev, PCI_COMMAND, 0); /* disable memory mapped ports + busmaster */
del_timer(&cs->hw.hfcpci.timer);
- kfree(cs->hw.hfcpci.share_start);
- cs->hw.hfcpci.share_start = NULL;
+ pci_free_consistent(cs->hw.hfcpci.dev, 0x8000,
+ cs->hw.hfcpci.fifos, cs->hw.hfcpci.dma);
+ cs->hw.hfcpci.fifos = NULL;
iounmap((void *)cs->hw.hfcpci.pci_io);
}

@@ -1663,8 +1664,19 @@ setup_hfcpci(struct IsdnCard *card)
dev_hfcpci);
i++;
if (tmp_hfcpci) {
+ dma_addr_t dma_mask = DMA_BIT_MASK(32) & ~0x7fffUL;
if (pci_enable_device(tmp_hfcpci))
continue;
+ if (pci_set_dma_mask(tmp_hfcpci, dma_mask)) {
+ printk(KERN_WARNING
+ "HiSax hfc_pci: No suitable DMA available.\n");
+ continue;
+ }
+ if (pci_set_consistent_dma_mask(tmp_hfcpci, dma_mask)) {
+ printk(KERN_WARNING
+ "HiSax hfc_pci: No suitable consistent DMA available.\n");
+ continue;
+ }
pci_set_master(tmp_hfcpci);
if ((card->para[0]) && (card->para[0] != (tmp_hfcpci->resource[ 0].start & PCI_BASE_ADDRESS_IO_MASK)))
continue;
@@ -1693,22 +1705,29 @@ setup_hfcpci(struct IsdnCard *card)
printk(KERN_WARNING "HFC-PCI: No IO-Mem for PCI card found\n");
return (0);
}
+
/* Allocate memory for FIFOS */
- /* Because the HFC-PCI needs a 32K physical alignment, we */
- /* need to allocate the double mem and align the address */
- if (!(cs->hw.hfcpci.share_start = kmalloc(65536, GFP_KERNEL))) {
- printk(KERN_WARNING "HFC-PCI: Error allocating memory for FIFO!\n");
+ cs->hw.hfcpci.fifos = pci_alloc_consistent(cs->hw.hfcpci.dev,
+ 0x8000, &cs->hw.hfcpci.dma);
+ if (!cs->hw.hfcpci.fifos) {
+ printk(KERN_WARNING "HFC-PCI: Error allocating FIFO memory!\n");
+ return 0;
+ }
+ if (cs->hw.hfcpci.dma & 0x7fff) {
+ printk(KERN_WARNING
+ "HFC-PCI: Error DMA memory not on 32K boundary (%lx)\n",
+ (u_long)cs->hw.hfcpci.dma);
+ pci_free_consistent(cs->hw.hfcpci.dev, 0x8000,
+ cs->hw.hfcpci.fifos, cs->hw.hfcpci.dma);
return 0;
}
- cs->hw.hfcpci.fifos = (void *)
- (((ulong) cs->hw.hfcpci.share_start) & ~0x7FFF) + 0x8000;
- pci_write_config_dword(cs->hw.hfcpci.dev, 0x80, (u_int) virt_to_bus(cs->hw.hfcpci.fifos));
+ pci_write_config_dword(cs->hw.hfcpci.dev, 0x80, (u32)cs->hw.hfcpci.dma);
cs->hw.hfcpci.pci_io = ioremap((ulong) cs->hw.hfcpci.pci_io, 256);
printk(KERN_INFO
- "HFC-PCI: defined at mem %p fifo %p(%#x) IRQ %d HZ %d\n",
+ "HFC-PCI: defined at mem %p fifo %p(%lx) IRQ %d HZ %d\n",
cs->hw.hfcpci.pci_io,
cs->hw.hfcpci.fifos,
- (u_int) virt_to_bus(cs->hw.hfcpci.fifos),
+ (u_long)cs->hw.hfcpci.dma,
cs->irq, HZ);

spin_lock_irqsave(&cs->lock, flags);
--- a/drivers/isdn/hisax/hisax.h
+++ b/drivers/isdn/hisax/hisax.h
@@ -694,7 +694,7 @@ struct hfcPCI_hw {
int nt_timer;
struct pci_dev *dev;
unsigned char *pci_io; /* start of PCI IO memory */
- void *share_start; /* shared memory for Fifos start */
+ dma_addr_t dma; /* dma handle for Fifos */
void *fifos; /* FIFO memory */
int last_bfifo_cnt[2]; /* marker saving last b-fifo frame count */
struct timer_list timer;



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