* [PATCH] rtw88: switch from 'pci_' to 'dma_' API
@ 2020-08-20 15:06 Christophe JAILLET
2020-08-27 10:02 ` Kalle Valo
0 siblings, 1 reply; 2+ messages in thread
From: Christophe JAILLET @ 2020-08-20 15:06 UTC (permalink / raw)
To: yhchuang, kvalo, davem, kuba
Cc: linux-wireless, netdev, linux-kernel, kernel-janitors,
Christophe JAILLET
The wrappers in include/linux/pci-dma-compat.h should go away.
The patch has been generated with the coccinelle script below and has been
hand modified to replace GFP_ with a correct flag.
It has been compile tested.
When memory is allocated in 'rtw_pci_init_tx_ring()' and
'rtw_pci_init_rx_ring()' GFP_KERNEL can be used because both functions are
called from a probe function and no spinlock is taken.
The call chain is:
rtw_pci_probe
--> rtw_pci_setup_resource
--> rtw_pci_init
--> rtw_pci_init_trx_ring
--> rtw_pci_init_tx_ring
--> rtw_pci_init_rx_ring
@@
@@
- PCI_DMA_BIDIRECTIONAL
+ DMA_BIDIRECTIONAL
@@
@@
- PCI_DMA_TODEVICE
+ DMA_TO_DEVICE
@@
@@
- PCI_DMA_FROMDEVICE
+ DMA_FROM_DEVICE
@@
@@
- PCI_DMA_NONE
+ DMA_NONE
@@
expression e1, e2, e3;
@@
- pci_alloc_consistent(e1, e2, e3)
+ dma_alloc_coherent(&e1->dev, e2, e3, GFP_)
@@
expression e1, e2, e3;
@@
- pci_zalloc_consistent(e1, e2, e3)
+ dma_alloc_coherent(&e1->dev, e2, e3, GFP_)
@@
expression e1, e2, e3, e4;
@@
- pci_free_consistent(e1, e2, e3, e4)
+ dma_free_coherent(&e1->dev, e2, e3, e4)
@@
expression e1, e2, e3, e4;
@@
- pci_map_single(e1, e2, e3, e4)
+ dma_map_single(&e1->dev, e2, e3, e4)
@@
expression e1, e2, e3, e4;
@@
- pci_unmap_single(e1, e2, e3, e4)
+ dma_unmap_single(&e1->dev, e2, e3, e4)
@@
expression e1, e2, e3, e4, e5;
@@
- pci_map_page(e1, e2, e3, e4, e5)
+ dma_map_page(&e1->dev, e2, e3, e4, e5)
@@
expression e1, e2, e3, e4;
@@
- pci_unmap_page(e1, e2, e3, e4)
+ dma_unmap_page(&e1->dev, e2, e3, e4)
@@
expression e1, e2, e3, e4;
@@
- pci_map_sg(e1, e2, e3, e4)
+ dma_map_sg(&e1->dev, e2, e3, e4)
@@
expression e1, e2, e3, e4;
@@
- pci_unmap_sg(e1, e2, e3, e4)
+ dma_unmap_sg(&e1->dev, e2, e3, e4)
@@
expression e1, e2, e3, e4;
@@
- pci_dma_sync_single_for_cpu(e1, e2, e3, e4)
+ dma_sync_single_for_cpu(&e1->dev, e2, e3, e4)
@@
expression e1, e2, e3, e4;
@@
- pci_dma_sync_single_for_device(e1, e2, e3, e4)
+ dma_sync_single_for_device(&e1->dev, e2, e3, e4)
@@
expression e1, e2, e3, e4;
@@
- pci_dma_sync_sg_for_cpu(e1, e2, e3, e4)
+ dma_sync_sg_for_cpu(&e1->dev, e2, e3, e4)
@@
expression e1, e2, e3, e4;
@@
- pci_dma_sync_sg_for_device(e1, e2, e3, e4)
+ dma_sync_sg_for_device(&e1->dev, e2, e3, e4)
@@
expression e1, e2;
@@
- pci_dma_mapping_error(e1, e2)
+ dma_mapping_error(&e1->dev, e2)
@@
expression e1, e2;
@@
- pci_set_dma_mask(e1, e2)
+ dma_set_mask(&e1->dev, e2)
@@
expression e1, e2;
@@
- pci_set_consistent_dma_mask(e1, e2)
+ dma_set_coherent_mask(&e1->dev, e2)
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
If needed, see post from Christoph Hellwig on the kernel-janitors ML:
https://marc.info/?l=kernel-janitors&m=158745678307186&w=4
---
drivers/net/wireless/realtek/rtw88/pci.c | 33 ++++++++++++------------
1 file changed, 16 insertions(+), 17 deletions(-)
diff --git a/drivers/net/wireless/realtek/rtw88/pci.c b/drivers/net/wireless/realtek/rtw88/pci.c
index 3413973bc475..135dd331691c 100644
--- a/drivers/net/wireless/realtek/rtw88/pci.c
+++ b/drivers/net/wireless/realtek/rtw88/pci.c
@@ -109,7 +109,7 @@ static void rtw_pci_free_tx_ring_skbs(struct rtw_dev *rtwdev,
tx_data = rtw_pci_get_tx_data(skb);
dma = tx_data->dma;
- pci_unmap_single(pdev, dma, skb->len, PCI_DMA_TODEVICE);
+ dma_unmap_single(&pdev->dev, dma, skb->len, DMA_TO_DEVICE);
dev_kfree_skb_any(skb);
}
}
@@ -125,7 +125,7 @@ static void rtw_pci_free_tx_ring(struct rtw_dev *rtwdev,
rtw_pci_free_tx_ring_skbs(rtwdev, tx_ring);
/* free the ring itself */
- pci_free_consistent(pdev, ring_sz, head, tx_ring->r.dma);
+ dma_free_coherent(&pdev->dev, ring_sz, head, tx_ring->r.dma);
tx_ring->r.head = NULL;
}
@@ -144,7 +144,7 @@ static void rtw_pci_free_rx_ring_skbs(struct rtw_dev *rtwdev,
continue;
dma = *((dma_addr_t *)skb->cb);
- pci_unmap_single(pdev, dma, buf_sz, PCI_DMA_FROMDEVICE);
+ dma_unmap_single(&pdev->dev, dma, buf_sz, DMA_FROM_DEVICE);
dev_kfree_skb(skb);
rx_ring->buf[i] = NULL;
}
@@ -159,7 +159,7 @@ static void rtw_pci_free_rx_ring(struct rtw_dev *rtwdev,
rtw_pci_free_rx_ring_skbs(rtwdev, rx_ring);
- pci_free_consistent(pdev, ring_sz, head, rx_ring->r.dma);
+ dma_free_coherent(&pdev->dev, ring_sz, head, rx_ring->r.dma);
}
static void rtw_pci_free_trx_ring(struct rtw_dev *rtwdev)
@@ -194,7 +194,7 @@ static int rtw_pci_init_tx_ring(struct rtw_dev *rtwdev,
return -EINVAL;
}
- head = pci_zalloc_consistent(pdev, ring_sz, &dma);
+ head = dma_alloc_coherent(&pdev->dev, ring_sz, &dma, GFP_KERNEL);
if (!head) {
rtw_err(rtwdev, "failed to allocate tx ring\n");
return -ENOMEM;
@@ -223,8 +223,8 @@ static int rtw_pci_reset_rx_desc(struct rtw_dev *rtwdev, struct sk_buff *skb,
if (!skb)
return -EINVAL;
- dma = pci_map_single(pdev, skb->data, buf_sz, PCI_DMA_FROMDEVICE);
- if (pci_dma_mapping_error(pdev, dma))
+ dma = dma_map_single(&pdev->dev, skb->data, buf_sz, DMA_FROM_DEVICE);
+ if (dma_mapping_error(&pdev->dev, dma))
return -EBUSY;
*((dma_addr_t *)skb->cb) = dma;
@@ -272,7 +272,7 @@ static int rtw_pci_init_rx_ring(struct rtw_dev *rtwdev,
return -EINVAL;
}
- head = pci_zalloc_consistent(pdev, ring_sz, &dma);
+ head = dma_alloc_coherent(&pdev->dev, ring_sz, &dma, GFP_KERNEL);
if (!head) {
rtw_err(rtwdev, "failed to allocate rx ring\n");
return -ENOMEM;
@@ -311,11 +311,11 @@ static int rtw_pci_init_rx_ring(struct rtw_dev *rtwdev,
if (!skb)
continue;
dma = *((dma_addr_t *)skb->cb);
- pci_unmap_single(pdev, dma, buf_sz, PCI_DMA_FROMDEVICE);
+ dma_unmap_single(&pdev->dev, dma, buf_sz, DMA_FROM_DEVICE);
dev_kfree_skb_any(skb);
rx_ring->buf[i] = NULL;
}
- pci_free_consistent(pdev, ring_sz, head, dma);
+ dma_free_coherent(&pdev->dev, ring_sz, head, dma);
rtw_err(rtwdev, "failed to init rx buffer\n");
@@ -675,8 +675,7 @@ static void rtw_pci_release_rsvd_page(struct rtw_pci *rtwpci,
tx_data = rtw_pci_get_tx_data(prev);
dma = tx_data->dma;
- pci_unmap_single(rtwpci->pdev, dma, prev->len,
- PCI_DMA_TODEVICE);
+ dma_unmap_single(&rtwpci->pdev->dev, dma, prev->len, DMA_TO_DEVICE);
dev_kfree_skb_any(prev);
}
@@ -755,9 +754,9 @@ static int rtw_pci_tx_write_data(struct rtw_dev *rtwdev,
memset(pkt_desc, 0, tx_pkt_desc_sz);
pkt_info->qsel = rtw_pci_get_tx_qsel(skb, queue);
rtw_tx_fill_tx_desc(pkt_info, skb);
- dma = pci_map_single(rtwpci->pdev, skb->data, skb->len,
- PCI_DMA_TODEVICE);
- if (pci_dma_mapping_error(rtwpci->pdev, dma))
+ dma = dma_map_single(&rtwpci->pdev->dev, skb->data, skb->len,
+ DMA_TO_DEVICE);
+ if (dma_mapping_error(&rtwpci->pdev->dev, dma))
return -EBUSY;
/* after this we got dma mapped, there is no way back */
@@ -896,8 +895,8 @@ static void rtw_pci_tx_isr(struct rtw_dev *rtwdev, struct rtw_pci *rtwpci,
break;
}
tx_data = rtw_pci_get_tx_data(skb);
- pci_unmap_single(rtwpci->pdev, tx_data->dma, skb->len,
- PCI_DMA_TODEVICE);
+ dma_unmap_single(&rtwpci->pdev->dev, tx_data->dma, skb->len,
+ DMA_TO_DEVICE);
/* just free command packets from host to card */
if (hw_queue == RTW_TX_QUEUE_H2C) {
--
2.25.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] rtw88: switch from 'pci_' to 'dma_' API
2020-08-20 15:06 [PATCH] rtw88: switch from 'pci_' to 'dma_' API Christophe JAILLET
@ 2020-08-27 10:02 ` Kalle Valo
0 siblings, 0 replies; 2+ messages in thread
From: Kalle Valo @ 2020-08-27 10:02 UTC (permalink / raw)
To: Christophe JAILLET
Cc: yhchuang, davem, kuba, linux-wireless, netdev, linux-kernel,
kernel-janitors, Christophe JAILLET
Christophe JAILLET <christophe.jaillet@wanadoo.fr> wrote:
> The wrappers in include/linux/pci-dma-compat.h should go away.
>
> The patch has been generated with the coccinelle script below and has been
> hand modified to replace GFP_ with a correct flag.
> It has been compile tested.
>
> When memory is allocated in 'rtw_pci_init_tx_ring()' and
> 'rtw_pci_init_rx_ring()' GFP_KERNEL can be used because both functions are
> called from a probe function and no spinlock is taken.
>
> The call chain is:
> rtw_pci_probe
> --> rtw_pci_setup_resource
> --> rtw_pci_init
> --> rtw_pci_init_trx_ring
> --> rtw_pci_init_tx_ring
> --> rtw_pci_init_rx_ring
>
>
> @@
> @@
> - PCI_DMA_BIDIRECTIONAL
> + DMA_BIDIRECTIONAL
>
> @@
> @@
> - PCI_DMA_TODEVICE
> + DMA_TO_DEVICE
>
> @@
> @@
> - PCI_DMA_FROMDEVICE
> + DMA_FROM_DEVICE
>
> @@
> @@
> - PCI_DMA_NONE
> + DMA_NONE
>
> @@
> expression e1, e2, e3;
> @@
> - pci_alloc_consistent(e1, e2, e3)
> + dma_alloc_coherent(&e1->dev, e2, e3, GFP_)
>
> @@
> expression e1, e2, e3;
> @@
> - pci_zalloc_consistent(e1, e2, e3)
> + dma_alloc_coherent(&e1->dev, e2, e3, GFP_)
>
> @@
> expression e1, e2, e3, e4;
> @@
> - pci_free_consistent(e1, e2, e3, e4)
> + dma_free_coherent(&e1->dev, e2, e3, e4)
>
> @@
> expression e1, e2, e3, e4;
> @@
> - pci_map_single(e1, e2, e3, e4)
> + dma_map_single(&e1->dev, e2, e3, e4)
>
> @@
> expression e1, e2, e3, e4;
> @@
> - pci_unmap_single(e1, e2, e3, e4)
> + dma_unmap_single(&e1->dev, e2, e3, e4)
>
> @@
> expression e1, e2, e3, e4, e5;
> @@
> - pci_map_page(e1, e2, e3, e4, e5)
> + dma_map_page(&e1->dev, e2, e3, e4, e5)
>
> @@
> expression e1, e2, e3, e4;
> @@
> - pci_unmap_page(e1, e2, e3, e4)
> + dma_unmap_page(&e1->dev, e2, e3, e4)
>
> @@
> expression e1, e2, e3, e4;
> @@
> - pci_map_sg(e1, e2, e3, e4)
> + dma_map_sg(&e1->dev, e2, e3, e4)
>
> @@
> expression e1, e2, e3, e4;
> @@
> - pci_unmap_sg(e1, e2, e3, e4)
> + dma_unmap_sg(&e1->dev, e2, e3, e4)
>
> @@
> expression e1, e2, e3, e4;
> @@
> - pci_dma_sync_single_for_cpu(e1, e2, e3, e4)
> + dma_sync_single_for_cpu(&e1->dev, e2, e3, e4)
>
> @@
> expression e1, e2, e3, e4;
> @@
> - pci_dma_sync_single_for_device(e1, e2, e3, e4)
> + dma_sync_single_for_device(&e1->dev, e2, e3, e4)
>
> @@
> expression e1, e2, e3, e4;
> @@
> - pci_dma_sync_sg_for_cpu(e1, e2, e3, e4)
> + dma_sync_sg_for_cpu(&e1->dev, e2, e3, e4)
>
> @@
> expression e1, e2, e3, e4;
> @@
> - pci_dma_sync_sg_for_device(e1, e2, e3, e4)
> + dma_sync_sg_for_device(&e1->dev, e2, e3, e4)
>
> @@
> expression e1, e2;
> @@
> - pci_dma_mapping_error(e1, e2)
> + dma_mapping_error(&e1->dev, e2)
>
> @@
> expression e1, e2;
> @@
> - pci_set_dma_mask(e1, e2)
> + dma_set_mask(&e1->dev, e2)
>
> @@
> expression e1, e2;
> @@
> - pci_set_consistent_dma_mask(e1, e2)
> + dma_set_coherent_mask(&e1->dev, e2)
>
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Patch applied to wireless-drivers-next.git, thanks.
24712ea996d8 rtw88: switch from 'pci_' to 'dma_' API
--
https://patchwork.kernel.org/patch/11726423/
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
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2020-08-27 10:02 ` Kalle Valo
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