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| author | Sang-Heon Jeon <ekffu200098@gmail.com> | 2026-08-24 01:18:14 +0900 |
|---|---|---|
| committer | Julia Lawall <Julia.Lawall@inria.fr> | 2026-08-23 22:12:11 +0200 |
| commit | 2bd30b8dc75b823dd7bbef9d7bc68e1fd7ecee5c (patch) | |
| tree | dcc4da1d99f17541c5590ac63c77da4bf372a4ab /drivers/dma/bestcomm/ata.c | |
| download | linux-stable-2bd30b8dc75b823dd7bbef9d7bc68e1fd7ecee5c.tar.gz linux-stable-2bd30b8dc75b823dd7bbef9d7bc68e1fd7ecee5c.zip | |
coccinelle: alloc_cast: drop removed allocatorsgrafted
- pci_alloc_consistent() and pci_zalloc_consistent() were removed by
commit 7968778914e5
("PCI: Remove the deprecated "pci-dma-compat.h" API")
- kmem_alloc() was removed by commit f078d4ea8276
("xfs: convert kmem_alloc() to kmalloc()")
- kmem_zalloc() was removed by commit 10634530f7ba
("xfs: convert kmem_zalloc() to kzalloc()")
- kmem_zone_alloc() and kmem_zone_zalloc() were removed by commit
bae633a4a283 ("xfs: remove xfs_zone_{alloc,zalloc} helpers")
So drop them from the rules.
No functional change.
Signed-off-by: Sang-Heon Jeon <ekffu200098@gmail.com>
Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
Diffstat (limited to 'drivers/dma/bestcomm/ata.c')
| -rw-r--r-- | drivers/dma/bestcomm/ata.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/drivers/dma/bestcomm/ata.c b/drivers/dma/bestcomm/ata.c new file mode 100644 index 000000000..502a45d76 --- /dev/null +++ b/drivers/dma/bestcomm/ata.c @@ -0,0 +1,152 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Bestcomm ATA task driver + * + * Patterned after bestcomm/fec.c by Dale Farnsworth <dfarnsworth@mvista.com> + * 2003-2004 (c) MontaVista, Software, Inc. + * + * Copyright (C) 2006-2007 Sylvain Munaut <tnt@246tNt.com> + * Copyright (C) 2006 Freescale - John Rigby + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/types.h> +#include <asm/io.h> + +#include <linux/fsl/bestcomm/bestcomm.h> +#include <linux/fsl/bestcomm/bestcomm_priv.h> +#include <linux/fsl/bestcomm/ata.h> + + +/* ======================================================================== */ +/* Task image/var/inc */ +/* ======================================================================== */ + +/* ata task image */ +extern u32 bcom_ata_task[]; + +/* ata task vars that need to be set before enabling the task */ +struct bcom_ata_var { + u32 enable; /* (u16*) address of task's control register */ + u32 bd_base; /* (struct bcom_bd*) beginning of ring buffer */ + u32 bd_last; /* (struct bcom_bd*) end of ring buffer */ + u32 bd_start; /* (struct bcom_bd*) current bd */ + u32 buffer_size; /* size of receive buffer */ +}; + +/* ata task incs that need to be set before enabling the task */ +struct bcom_ata_inc { + u16 pad0; + s16 incr_bytes; + u16 pad1; + s16 incr_dst; + u16 pad2; + s16 incr_src; +}; + + +/* ======================================================================== */ +/* Task support code */ +/* ======================================================================== */ + +struct bcom_task * +bcom_ata_init(int queue_len, int maxbufsize) +{ + struct bcom_task *tsk; + struct bcom_ata_var *var; + struct bcom_ata_inc *inc; + + /* Prefetch breaks ATA DMA. Turn it off for ATA DMA */ + bcom_disable_prefetch(); + + tsk = bcom_task_alloc(queue_len, sizeof(struct bcom_ata_bd), 0); + if (!tsk) + return NULL; + + tsk->flags = BCOM_FLAGS_NONE; + + bcom_ata_reset_bd(tsk); + + var = (struct bcom_ata_var *) bcom_task_var(tsk->tasknum); + inc = (struct bcom_ata_inc *) bcom_task_inc(tsk->tasknum); + + if (bcom_load_image(tsk->tasknum, bcom_ata_task)) { + bcom_task_free(tsk); + return NULL; + } + + var->enable = bcom_eng->regs_base + + offsetof(struct mpc52xx_sdma, tcr[tsk->tasknum]); + var->bd_base = tsk->bd_pa; + var->bd_last = tsk->bd_pa + ((tsk->num_bd-1) * tsk->bd_size); + var->bd_start = tsk->bd_pa; + var->buffer_size = maxbufsize; + + /* Configure some stuff */ + bcom_set_task_pragma(tsk->tasknum, BCOM_ATA_PRAGMA); + bcom_set_task_auto_start(tsk->tasknum, tsk->tasknum); + + out_8(&bcom_eng->regs->ipr[BCOM_INITIATOR_ATA_RX], BCOM_IPR_ATA_RX); + out_8(&bcom_eng->regs->ipr[BCOM_INITIATOR_ATA_TX], BCOM_IPR_ATA_TX); + + out_be32(&bcom_eng->regs->IntPend, 1<<tsk->tasknum); /* Clear ints */ + + return tsk; +} +EXPORT_SYMBOL_GPL(bcom_ata_init); + +void bcom_ata_rx_prepare(struct bcom_task *tsk) +{ + struct bcom_ata_inc *inc; + + inc = (struct bcom_ata_inc *) bcom_task_inc(tsk->tasknum); + + inc->incr_bytes = -(s16)sizeof(u32); + inc->incr_src = 0; + inc->incr_dst = sizeof(u32); + + bcom_set_initiator(tsk->tasknum, BCOM_INITIATOR_ATA_RX); +} +EXPORT_SYMBOL_GPL(bcom_ata_rx_prepare); + +void bcom_ata_tx_prepare(struct bcom_task *tsk) +{ + struct bcom_ata_inc *inc; + + inc = (struct bcom_ata_inc *) bcom_task_inc(tsk->tasknum); + + inc->incr_bytes = -(s16)sizeof(u32); + inc->incr_src = sizeof(u32); + inc->incr_dst = 0; + + bcom_set_initiator(tsk->tasknum, BCOM_INITIATOR_ATA_TX); +} +EXPORT_SYMBOL_GPL(bcom_ata_tx_prepare); + +void bcom_ata_reset_bd(struct bcom_task *tsk) +{ + struct bcom_ata_var *var; + + /* Reset all BD */ + memset_io(tsk->bd, 0x00, tsk->num_bd * tsk->bd_size); + + tsk->index = 0; + tsk->outdex = 0; + + var = (struct bcom_ata_var *) bcom_task_var(tsk->tasknum); + var->bd_start = var->bd_base; +} +EXPORT_SYMBOL_GPL(bcom_ata_reset_bd); + +void bcom_ata_release(struct bcom_task *tsk) +{ + /* Nothing special for the ATA tasks */ + bcom_task_free(tsk); +} +EXPORT_SYMBOL_GPL(bcom_ata_release); + + +MODULE_DESCRIPTION("BestComm ATA task driver"); +MODULE_AUTHOR("John Rigby"); +MODULE_LICENSE("GPL v2"); |
