| Message ID | dd34ecd3c8afe5a9a29e026035a4a11c63e033ae.1626014972.git.christophe.jaillet@wanadoo.fr (mailing list archive) |
|---|---|
| State | Deferred |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | net: wwan: iosm: switch from 'pci_' to 'dma_' API | expand |
| Context | Check | Description |
|---|---|---|
| netdev/cover_letter | success | Link |
| netdev/fixes_present | success | Link |
| netdev/patch_count | success | Link |
| netdev/tree_selection | success | Guessed tree name to be net-next |
| netdev/subject_prefix | warning | Target tree name not specified in the subject |
| netdev/cc_maintainers | success | CCed 8 of 8 maintainers |
| netdev/source_inline | success | Was 0 now: 0 |
| netdev/verify_signedoff | success | Link |
| netdev/module_param | success | Was 0 now: 0 |
| netdev/build_32bit | success | Errors and warnings before: 0 this patch: 0 |
| netdev/kdoc | success | Errors and warnings before: 0 this patch: 0 |
| netdev/verify_fixes | success | Link |
| netdev/checkpatch | warning | WARNING: line length of 81 exceeds 80 columns |
| netdev/build_allmodconfig_warn | success | Errors and warnings before: 0 this patch: 0 |
| netdev/header_inline | success | Link |
On 7/11/2021 8:21 PM, Christophe JAILLET 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 'ipc_protocol_init()' GFP_KERNEL can be used > because this flag is already used a few lines above and no lock is > acquired in the between. > > When memory is allocated in 'ipc_protocol_msg_prepipe_open()' GFP_ATOMIC > should be used because this flag is already used a few lines above. Thanks, Reviewed-by: M Chetan Kumar <m.chetan.kumar@intel.com> Regards, Chetan
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 91109e27efd3..a53ad97abb98 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; }
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 'ipc_protocol_init()' GFP_KERNEL can be used because this flag is already used a few lines above and no lock is acquired in the between. When memory is allocated in 'ipc_protocol_msg_prepipe_open()' GFP_ATOMIC should be used because this flag is already used 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 <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 When memory is allocated in 'ipc_protocol_msg_prepipe_open()', I think that GFP_KERNEL could be used, but I've not dug enough to be sure. So, better safe that sorry. --- 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(-)