[PATCH] net: wwan: iosm: switch from 'pci_' to 'dma_' API

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.

'ipc_protocol_init()' can use GFP_KERNEL, because this flag is already used
by a 'kzalloc()' call a few lines above.

'ipc_protocol_msg_prepipe_open()' must use GFP_ATOMIC, because this flag is
already used by a 'kcalloc()' call a few lines above.

@@ @@
-    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 <redacted>
---
If needed, see post from Christoph Hellwig on the kernel-janitors ML:
   https://marc.info/?l=kernel-janitors&m=158745678307186&w=4
---
 drivers/net/wwan/iosm/iosm_ipc_protocol.c     | 10 +++++-----
 drivers/net/wwan/iosm/iosm_ipc_protocol_ops.c | 13 ++++++-------
 2 files changed, 11 insertions(+), 12 deletions(-)

diff --git a/drivers/net/wwan/iosm/iosm_ipc_protocol.c b/drivers/net/wwan/iosm/iosm_ipc_protocol.c
index 834d8b146a94..63fc7012f09f 100644
--- a/drivers/net/wwan/iosm/iosm_ipc_protocol.c
+++ b/drivers/net/wwan/iosm/iosm_ipc_protocol.c

@@ -239,9 +239,9 @@ struct iosm_protocol *ipc_protocol_init(struct iosm_imem *ipc_imem)
 	ipc_protocol->old_msg_tail = 0;
 
 	ipc_protocol->p_ap_shm =
-		pci_alloc_consistent(ipc_protocol->pcie->pci,
-				     sizeof(*ipc_protocol->p_ap_shm),
-				     &ipc_protocol->phy_ap_shm);
+		dma_alloc_coherent(&ipc_protocol->pcie->pci->dev,
+				   sizeof(*ipc_protocol->p_ap_shm),
+				   &ipc_protocol->phy_ap_shm, GFP_KERNEL);
 
 	if (!ipc_protocol->p_ap_shm) {
 		dev_err(ipc_protocol->dev, "pci shm alloc error");

@@ -275,8 +275,8 @@ struct iosm_protocol *ipc_protocol_init(struct iosm_imem *ipc_imem)
 
 void ipc_protocol_deinit(struct iosm_protocol *proto)
 {
-	pci_free_consistent(proto->pcie->pci, sizeof(*proto->p_ap_shm),
-			    proto->p_ap_shm, proto->phy_ap_shm);
+	dma_free_coherent(&proto->pcie->pci->dev, sizeof(*proto->p_ap_shm),
+			  proto->p_ap_shm, proto->phy_ap_shm);
 
 	ipc_pm_deinit(proto);
 	kfree(proto);

diff --git a/drivers/net/wwan/iosm/iosm_ipc_protocol_ops.c b/drivers/net/wwan/iosm/iosm_ipc_protocol_ops.c
index 35d590743d3a..c6b032f95d2e 100644
--- a/drivers/net/wwan/iosm/iosm_ipc_protocol_ops.c
+++ b/drivers/net/wwan/iosm/iosm_ipc_protocol_ops.c

@@ -74,9 +74,9 @@ static int ipc_protocol_msg_prepipe_open(struct iosm_protocol *ipc_protocol,
 		return -ENOMEM;
 
 	/* Allocate the transfer descriptors for the pipe. */
-	tdr = pci_alloc_consistent(ipc_protocol->pcie->pci,
-				   pipe->nr_of_entries * sizeof(*tdr),
-				   &pipe->phy_tdr_start);
+	tdr = dma_alloc_coherent(&ipc_protocol->pcie->pci->dev,
+				 pipe->nr_of_entries * sizeof(*tdr),
+				 &pipe->phy_tdr_start, GFP_ATOMIC);
 	if (!tdr) {
 		kfree(skbr);
 		dev_err(ipc_protocol->dev, "tdr alloc error");

@@ -492,10 +492,9 @@ void ipc_protocol_pipe_cleanup(struct iosm_protocol *ipc_protocol,
 
 	/* Free and reset the td and skbuf circular buffers. kfree is save! */
 	if (pipe->tdr_start) {
-		pci_free_consistent(ipc_protocol->pcie->pci,
-				    sizeof(*pipe->tdr_start) *
-					    pipe->nr_of_entries,
-				    pipe->tdr_start, pipe->phy_tdr_start);
+		dma_free_coherent(&ipc_protocol->pcie->pci->dev,
+				  sizeof(*pipe->tdr_start) * pipe->nr_of_entries,
+				  pipe->tdr_start, pipe->phy_tdr_start);
 
 		pipe->tdr_start = NULL;
 	}

-- 
2.30.2

Hello:

This patch was applied to netdev/net-next.git (refs/heads/master):

On Sat, 21 Aug 2021 22:54:57 +0200 you 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.

'ipc_protocol_init()' can use GFP_KERNEL, because this flag is already used
by a 'kzalloc()' call a few lines above.

[...]

Here is the summary with links:
  - net: wwan: iosm: switch from 'pci_' to 'dma_' API
    https://git.kernel.org/netdev/net-next/c/44ee76581dec

You are awesome, thank you!
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