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dmaengine: dw-edma: fix __iomem type confusion 

The new driver mixes up dma_addr_t and __iomem pointers, which results
in warnings on some 32-bit architectures, like:

drivers/dma/dw-edma/dw-edma-v0-core.c: In function '__dw_regs':
drivers/dma/dw-edma/dw-edma-v0-core.c:28:9: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
  return (struct dw_edma_v0_regs __iomem *)dw->rg_region.vaddr;

Make it use __iomem pointers consistently here, and avoid using dma_addr_t
for __iomem tokens altogether.

A small complication here is the debugfs code, which passes an __iomem
token as the private data for debugfs files, requiring the use of
extra __force.

Fixes: 7e4b8a4fbe ("dmaengine: Add Synopsys eDMA IP version 0 support")
Link: https://lore.kernel.org/lkml/20190617131918.2518727-1-arnd@arndb.de/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20190722124457.1093886-2-arnd@arndb.de
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Arnd Bergmann 2019-07-22 14:44:44 +02:00 committed by Vinod Koul
parent f0414087a1
commit 756c3ef934
4 changed files with 29 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/dma/dw-edma/dw-edma-core.h
View File

@ -50,7 +50,7 @@ struct dw_edma_burst {
struct dw_edma_region {
phys_addr_t paddr;
dma_addr_t vaddr;
void __iomem *vaddr;
size_t sz;
};

18
drivers/dma/dw-edma/dw-edma-pcie.c
View File

@ -130,19 +130,19 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
chip->id = pdev->devfn;
chip->irq = pdev->irq;
dw->rg_region.vaddr = (dma_addr_t)pcim_iomap_table(pdev)[pdata->rg_bar];
dw->rg_region.vaddr = pcim_iomap_table(pdev)[pdata->rg_bar];
dw->rg_region.vaddr += pdata->rg_off;
dw->rg_region.paddr = pdev->resource[pdata->rg_bar].start;
dw->rg_region.paddr += pdata->rg_off;
dw->rg_region.sz = pdata->rg_sz;
dw->ll_region.vaddr = (dma_addr_t)pcim_iomap_table(pdev)[pdata->ll_bar];
dw->ll_region.vaddr = pcim_iomap_table(pdev)[pdata->ll_bar];
dw->ll_region.vaddr += pdata->ll_off;
dw->ll_region.paddr = pdev->resource[pdata->ll_bar].start;
dw->ll_region.paddr += pdata->ll_off;
dw->ll_region.sz = pdata->ll_sz;
dw->dt_region.vaddr = (dma_addr_t)pcim_iomap_table(pdev)[pdata->dt_bar];
dw->dt_region.vaddr = pcim_iomap_table(pdev)[pdata->dt_bar];
dw->dt_region.vaddr += pdata->dt_off;
dw->dt_region.paddr = pdev->resource[pdata->dt_bar].start;
dw->dt_region.paddr += pdata->dt_off;
@ -158,17 +158,17 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
pci_dbg(pdev, "Mode:\t%s\n",
dw->mode == EDMA_MODE_LEGACY ? "Legacy" : "Unroll");
pci_dbg(pdev, "Registers:\tBAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%pa, p=%pa)\n",
pci_dbg(pdev, "Registers:\tBAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n",
pdata->rg_bar, pdata->rg_off, pdata->rg_sz,
&dw->rg_region.vaddr, &dw->rg_region.paddr);
dw->rg_region.vaddr, &dw->rg_region.paddr);
pci_dbg(pdev, "L. List:\tBAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%pa, p=%pa)\n",
pci_dbg(pdev, "L. List:\tBAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n",
pdata->ll_bar, pdata->ll_off, pdata->ll_sz,
&dw->ll_region.vaddr, &dw->ll_region.paddr);
dw->ll_region.vaddr, &dw->ll_region.paddr);
pci_dbg(pdev, "Data:\tBAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%pa, p=%pa)\n",
pci_dbg(pdev, "Data:\tBAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n",
pdata->dt_bar, pdata->dt_off, pdata->dt_sz,
&dw->dt_region.vaddr, &dw->dt_region.paddr);
dw->dt_region.vaddr, &dw->dt_region.paddr);
pci_dbg(pdev, "Nr. IRQs:\t%u\n", dw->nr_irqs);

10
drivers/dma/dw-edma/dw-edma-v0-core.c
View File

@ -25,7 +25,7 @@ enum dw_edma_control {
static inline struct dw_edma_v0_regs __iomem *__dw_regs(struct dw_edma *dw)
{
return (struct dw_edma_v0_regs __iomem *)dw->rg_region.vaddr;
return dw->rg_region.vaddr;
}
#define SET(dw, name, value) \
@ -192,13 +192,13 @@ u32 dw_edma_v0_core_status_abort_int(struct dw_edma *dw, enum dw_edma_dir dir)
static void dw_edma_v0_core_write_chunk(struct dw_edma_chunk *chunk)
{
struct dw_edma_burst *child;
struct dw_edma_v0_lli *lli;
struct dw_edma_v0_llp *llp;
struct dw_edma_v0_lli __iomem *lli;
struct dw_edma_v0_llp __iomem *llp;
u32 control = 0, i = 0;
u64 sar, dar, addr;
int j;
lli = (struct dw_edma_v0_lli *)chunk->ll_region.vaddr;
lli = chunk->ll_region.vaddr;
if (chunk->cb)
control = DW_EDMA_V0_CB;
@ -224,7 +224,7 @@ static void dw_edma_v0_core_write_chunk(struct dw_edma_chunk *chunk)
i++;
}
llp = (struct dw_edma_v0_llp *)&lli[i];
llp = (void __iomem *)&lli[i];
control = DW_EDMA_V0_LLP | DW_EDMA_V0_TCB;
if (!chunk->cb)
control |= DW_EDMA_V0_CB;

27
drivers/dma/dw-edma/dw-edma-v0-debugfs.c
View File

@ -14,7 +14,7 @@
#include "dw-edma-core.h"
#define REGS_ADDR(name) \
((dma_addr_t *)&regs->name)
((void __force *)&regs->name)
#define REGISTER(name) \
{ #name, REGS_ADDR(name) }
@ -40,11 +40,11 @@
static struct dentry *base_dir;
static struct dw_edma *dw;
static struct dw_edma_v0_regs *regs;
static struct dw_edma_v0_regs __iomem *regs;
static struct {
void *start;
void *end;
void __iomem *start;
void __iomem *end;
} lim[2][EDMA_V0_MAX_NR_CH];
struct debugfs_entries {
@ -54,22 +54,23 @@ struct debugfs_entries {
static int dw_edma_debugfs_u32_get(void *data, u64 *val)
{
void __iomem *reg = (void __force __iomem *)data;
if (dw->mode == EDMA_MODE_LEGACY &&
data >= (void *)&regs->type.legacy.ch) {
void *ptr = (void *)&regs->type.legacy.ch;
reg >= (void __iomem *)&regs->type.legacy.ch) {
void __iomem *ptr = &regs->type.legacy.ch;
u32 viewport_sel = 0;
unsigned long flags;
u16 ch;
for (ch = 0; ch < dw->wr_ch_cnt; ch++)
if (lim[0][ch].start >= data && data < lim[0][ch].end) {
ptr += (data - lim[0][ch].start);
if (lim[0][ch].start >= reg && reg < lim[0][ch].end) {
ptr += (reg - lim[0][ch].start);
goto legacy_sel_wr;
}
for (ch = 0; ch < dw->rd_ch_cnt; ch++)
if (lim[1][ch].start >= data && data < lim[1][ch].end) {
ptr += (data - lim[1][ch].start);
if (lim[1][ch].start >= reg && reg < lim[1][ch].end) {
ptr += (reg - lim[1][ch].start);
goto legacy_sel_rd;
}
@ -86,7 +87,7 @@ legacy_sel_wr:
raw_spin_unlock_irqrestore(&dw->lock, flags);
} else {
*val = readl(data);
*val = readl(reg);
}
return 0;
@ -105,7 +106,7 @@ static void dw_edma_debugfs_create_x32(const struct debugfs_entries entries[],
}
}
static void dw_edma_debugfs_regs_ch(struct dw_edma_v0_ch_regs *regs,
static void dw_edma_debugfs_regs_ch(struct dw_edma_v0_ch_regs __iomem *regs,
struct dentry *dir)
{
int nr_entries;
@ -288,7 +289,7 @@ void dw_edma_v0_debugfs_on(struct dw_edma_chip *chip)
if (!dw)
return;
regs = (struct dw_edma_v0_regs *)dw->rg_region.vaddr;
regs = dw->rg_region.vaddr;
if (!regs)
return;