[PATCH 4/7] fore200e: devirtualize dma mapping calls

From: Christoph Hellwig
Date: Tue Oct 09 2018 - 10:57:38 EST

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There is no need for an indirection before calling the dma mapping
routines now that we store a struct device in struct fore200e.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
drivers/atm/fore200e.c | 112 +++++++----------------------------------
drivers/atm/fore200e.h | 4 --
2 files changed, 17 insertions(+), 99 deletions(-)

diff --git a/drivers/atm/fore200e.c b/drivers/atm/fore200e.c
index 05951550abb8..beeb71088560 100644
--- a/drivers/atm/fore200e.c
+++ b/drivers/atm/fore200e.c
@@ -193,8 +193,8 @@ fore200e_chunk_alloc(struct fore200e* fore200e, struct chunk* chunk, int size, i

chunk->align_addr = chunk->alloc_addr + offset;

- chunk->dma_addr = fore200e->bus->dma_map(fore200e, chunk->align_addr, size, direction);
-
+ chunk->dma_addr = dma_map_single(fore200e->dev, chunk->align_addr,
+ size, direction);
return 0;
}

@@ -204,8 +204,8 @@ fore200e_chunk_alloc(struct fore200e* fore200e, struct chunk* chunk, int size, i
static void
fore200e_chunk_free(struct fore200e* fore200e, struct chunk* chunk)
{
- fore200e->bus->dma_unmap(fore200e, chunk->dma_addr, chunk->dma_size, chunk->direction);
-
+ dma_unmap_single(fore200e->dev, chunk->dma_addr, chunk->dma_size,
+ chunk->direction);
kfree(chunk->alloc_addr);
}

@@ -427,46 +427,6 @@ static void fore200e_pca_write(u32 val, volatile u32 __iomem *addr)
writel(cpu_to_le32(val), addr);
}

-
-static u32
-fore200e_pca_dma_map(struct fore200e* fore200e, void* virt_addr, int size, int direction)
-{
- u32 dma_addr = dma_map_single(fore200e->dev, virt_addr, size, direction);
-
- DPRINTK(3, "PCI DVMA mapping: virt_addr = 0x%p, size = %d, direction = %d, --> dma_addr = 0x%08x\n",
- virt_addr, size, direction, dma_addr);
-
- return dma_addr;
-}
-
-
-static void
-fore200e_pca_dma_unmap(struct fore200e* fore200e, u32 dma_addr, int size, int direction)
-{
- DPRINTK(3, "PCI DVMA unmapping: dma_addr = 0x%08x, size = %d, direction = %d\n",
- dma_addr, size, direction);
-
- dma_unmap_single(fore200e->dev, dma_addr, size, direction);
-}
-
-
-static void
-fore200e_pca_dma_sync_for_cpu(struct fore200e* fore200e, u32 dma_addr, int size, int direction)
-{
- DPRINTK(3, "PCI DVMA sync: dma_addr = 0x%08x, size = %d, direction = %d\n", dma_addr, size, direction);
-
- dma_sync_single_for_cpu(fore200e->dev, dma_addr, size, direction);
-}
-
-static void
-fore200e_pca_dma_sync_for_device(struct fore200e* fore200e, u32 dma_addr, int size, int direction)
-{
- DPRINTK(3, "PCI DVMA sync: dma_addr = 0x%08x, size = %d, direction = %d\n", dma_addr, size, direction);
-
- dma_sync_single_for_device(fore200e->dev, dma_addr, size, direction);
-}
-
-
/* allocate a DMA consistent chunk of memory intended to act as a communication mechanism
(to hold descriptors, status, queues, etc.) shared by the driver and the adapter */

@@ -621,7 +581,8 @@ fore200e_pca_prom_read(struct fore200e* fore200e, struct prom_data* prom)
opcode.opcode = OPCODE_GET_PROM;
opcode.pad = 0;

- prom_dma = fore200e->bus->dma_map(fore200e, prom, sizeof(struct prom_data), DMA_FROM_DEVICE);
+ prom_dma = dma_map_single(fore200e->dev, prom, sizeof(struct prom_data),
+ DMA_FROM_DEVICE);

fore200e->bus->write(prom_dma, &entry->cp_entry->cmd.prom_block.prom_haddr);

@@ -633,7 +594,7 @@ fore200e_pca_prom_read(struct fore200e* fore200e, struct prom_data* prom)

*entry->status = STATUS_FREE;

- fore200e->bus->dma_unmap(fore200e, prom_dma, sizeof(struct prom_data), DMA_FROM_DEVICE);
+ dma_unmap_single(fore200e->dev, prom_dma, sizeof(struct prom_data), DMA_FROM_DEVICE);

if (ok == 0) {
printk(FORE200E "unable to get PROM data from device %s\n", fore200e->name);
@@ -670,10 +631,6 @@ static const struct fore200e_bus fore200e_pci_ops = {
.status_alignment = 32,
.read = fore200e_pca_read,
.write = fore200e_pca_write,
- .dma_map = fore200e_pca_dma_map,
- .dma_unmap = fore200e_pca_dma_unmap,
- .dma_sync_for_cpu = fore200e_pca_dma_sync_for_cpu,
- .dma_sync_for_device = fore200e_pca_dma_sync_for_device,
.dma_chunk_alloc = fore200e_pca_dma_chunk_alloc,
.dma_chunk_free = fore200e_pca_dma_chunk_free,
.configure = fore200e_pca_configure,
@@ -699,40 +656,6 @@ static void fore200e_sba_write(u32 val, volatile u32 __iomem *addr)
sbus_writel(val, addr);
}

-static u32 fore200e_sba_dma_map(struct fore200e *fore200e, void* virt_addr, int size, int direction)
-{
- u32 dma_addr;
-
- dma_addr = dma_map_single(fore200e->dev, virt_addr, size, direction);
-
- DPRINTK(3, "SBUS DVMA mapping: virt_addr = 0x%p, size = %d, direction = %d --> dma_addr = 0x%08x\n",
- virt_addr, size, direction, dma_addr);
-
- return dma_addr;
-}
-
-static void fore200e_sba_dma_unmap(struct fore200e *fore200e, u32 dma_addr, int size, int direction)
-{
- DPRINTK(3, "SBUS DVMA unmapping: dma_addr = 0x%08x, size = %d, direction = %d,\n",
- dma_addr, size, direction);
-
- dma_unmap_single(fore200e->dev, dma_addr, size, direction);
-}
-
-static void fore200e_sba_dma_sync_for_cpu(struct fore200e *fore200e, u32 dma_addr, int size, int direction)
-{
- DPRINTK(3, "SBUS DVMA sync: dma_addr = 0x%08x, size = %d, direction = %d\n", dma_addr, size, direction);
-
- dma_sync_single_for_cpu(fore200e->dev, dma_addr, size, direction);
-}
-
-static void fore200e_sba_dma_sync_for_device(struct fore200e *fore200e, u32 dma_addr, int size, int direction)
-{
- DPRINTK(3, "SBUS DVMA sync: dma_addr = 0x%08x, size = %d, direction = %d\n", dma_addr, size, direction);
-
- dma_sync_single_for_device(fore200e->dev, dma_addr, size, direction);
-}
-
/* Allocate a DVMA consistent chunk of memory intended to act as a communication mechanism
* (to hold descriptors, status, queues, etc.) shared by the driver and the adapter.
*/
@@ -873,10 +796,6 @@ static const struct fore200e_bus fore200e_sbus_ops = {
.status_alignment = 32,
.read = fore200e_sba_read,
.write = fore200e_sba_write,
- .dma_map = fore200e_sba_dma_map,
- .dma_unap = fore200e_sba_dma_unmap,
- .dma_sync_for_cpu = fore200e_sba_dma_sync_for_cpu,
- .dma_sync_for_device = fore200e_sba_dma_sync_for_device,
.dma_chunk_alloc = fore200e_sba_dma_chunk_alloc,
.dma_chunk_free = fore200e_sba_dma_chunk_free,
.configure = fore200e_sba_configure,
@@ -917,7 +836,7 @@ fore200e_tx_irq(struct fore200e* fore200e)
kfree(entry->data);

/* remove DMA mapping */
- fore200e->bus->dma_unmap(fore200e, entry->tpd->tsd[ 0 ].buffer, entry->tpd->tsd[ 0 ].length,
+ dma_unmap_single(fore200e->dev, entry->tpd->tsd[ 0 ].buffer, entry->tpd->tsd[ 0 ].length,
DMA_TO_DEVICE);

vc_map = entry->vc_map;
@@ -1138,12 +1057,14 @@ fore200e_push_rpd(struct fore200e* fore200e, struct atm_vcc* vcc, struct rpd* rp
buffer = FORE200E_HDL2BUF(rpd->rsd[ i ].handle);

/* Make device DMA transfer visible to CPU. */
- fore200e->bus->dma_sync_for_cpu(fore200e, buffer->data.dma_addr, rpd->rsd[ i ].length, DMA_FROM_DEVICE);
+ dma_sync_single_for_cpu(fore200e->dev, buffer->data.dma_addr,
+ rpd->rsd[i].length, DMA_FROM_DEVICE);

skb_put_data(skb, buffer->data.align_addr, rpd->rsd[i].length);

/* Now let the device get at it again. */
- fore200e->bus->dma_sync_for_device(fore200e, buffer->data.dma_addr, rpd->rsd[ i ].length, DMA_FROM_DEVICE);
+ dma_sync_single_for_device(fore200e->dev, buffer->data.dma_addr,
+ rpd->rsd[i].length, DMA_FROM_DEVICE);
}

DPRINTK(3, "rx skb: len = %d, truesize = %d\n", skb->len, skb->truesize);
@@ -1712,7 +1633,8 @@ fore200e_send(struct atm_vcc *vcc, struct sk_buff *skb)
entry->data = tx_copy ? data : NULL;

tpd = entry->tpd;
- tpd->tsd[ 0 ].buffer = fore200e->bus->dma_map(fore200e, data, tx_len, DMA_TO_DEVICE);
+ tpd->tsd[ 0 ].buffer = dma_map_single(fore200e->dev, data, tx_len,
+ DMA_TO_DEVICE);
tpd->tsd[ 0 ].length = tx_len;

FORE200E_NEXT_ENTRY(txq->head, QUEUE_SIZE_TX);
@@ -1785,8 +1707,8 @@ fore200e_getstats(struct fore200e* fore200e)
return -ENOMEM;
}

- stats_dma_addr = fore200e->bus->dma_map(fore200e, fore200e->stats,
- sizeof(struct stats), DMA_FROM_DEVICE);
+ stats_dma_addr = dma_map_single(fore200e->dev, fore200e->stats,
+ sizeof(struct stats), DMA_FROM_DEVICE);

FORE200E_NEXT_ENTRY(cmdq->head, QUEUE_SIZE_CMD);

@@ -1803,7 +1725,7 @@ fore200e_getstats(struct fore200e* fore200e)

*entry->status = STATUS_FREE;

- fore200e->bus->dma_unmap(fore200e, stats_dma_addr, sizeof(struct stats), DMA_FROM_DEVICE);
+ dma_unmap_single(fore200e->dev, stats_dma_addr, sizeof(struct stats), DMA_FROM_DEVICE);

if (ok == 0) {
printk(FORE200E "unable to get statistics from device %s\n", fore200e->name);
diff --git a/drivers/atm/fore200e.h b/drivers/atm/fore200e.h
index c8c6ea818ffc..f62fc9b85db0 100644
--- a/drivers/atm/fore200e.h
+++ b/drivers/atm/fore200e.h
@@ -805,10 +805,6 @@ typedef struct fore200e_bus {
int status_alignment; /* status words DMA alignment requirement */
u32 (*read)(volatile u32 __iomem *);
void (*write)(u32, volatile u32 __iomem *);
- u32 (*dma_map)(struct fore200e*, void*, int, int);
- void (*dma_unmap)(struct fore200e*, u32, int, int);
- void (*dma_sync_for_cpu)(struct fore200e*, u32, int, int);
- void (*dma_sync_for_device)(struct fore200e*, u32, int, int);
int (*dma_chunk_alloc)(struct fore200e*, struct chunk*, int, int, int);
void (*dma_chunk_free)(struct fore200e*, struct chunk*);
int (*configure)(struct fore200e*);
--
2.19.0

Next message: Greg Kroah-Hartman: "Re: [PATCH 01/14] phy: phy-pxa-usb: add a new driver"
Previous message: Christoph Hellwig: "[PATCH 3/7] fore200e: remove the align_size field of struct chunk"
In reply to: Christoph Hellwig: "[PATCH 3/7] fore200e: remove the align_size field of struct chunk"
Next in thread: Christoph Hellwig: "[PATCH 6/7] fore200e: don't use GFP_DMA"
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