Mirrors/u-boot
1
0
Fork 0
mirror of https://source.denx.de/u-boot/u-boot.git synced 2026-06-13 15:03:58 +03:00
Code Issues Packages Projects Releases Wiki Activity

ufs: Remap CPU to bus addresses using dev_phys_to_bus()

Browse Source 
Use dev_phys_to_bus() to convert CPU addresses of DMA descriptors
into bus addresses of DMA descriptors. This is necessary on hardware
which does not have 1:1 mapping between CPU and memory addressed by
the DMA. This has no impact on other hardware which does not need
this conversion.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
This commit is contained in:
Marek Vasut
2026-03-16 00:58:26 +01:00
parent d3c7fb5eb9
commit 4a95a2a9e1
1 changed files with 14 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
drivers/ufs/ufs-uclass.c
View File

@@ -19,6 +19,7 @@
#include <dm/device-internal.h>
#include <malloc.h>
#include <hexdump.h>
#include <phys2bus.h>
#include <scsi.h>
#include <ufs.h>
#include <asm/io.h>
@@ -466,13 +467,13 @@ static int ufshcd_make_hba_operational(struct ufs_hba *hba)
ufshcd_disable_intr_aggr(hba);
/* Configure UTRL and UTMRL base address registers */
ufshcd_writel(hba, lower_32_bits((dma_addr_t)hba->utrdl),
ufshcd_writel(hba, lower_32_bits(dev_phys_to_bus(hba->dev, (phys_addr_t)(uintptr_t)(hba->utrdl))),
REG_UTP_TRANSFER_REQ_LIST_BASE_L);
ufshcd_writel(hba, upper_32_bits((dma_addr_t)hba->utrdl),
ufshcd_writel(hba, upper_32_bits(dev_phys_to_bus(hba->dev, (phys_addr_t)(uintptr_t)(hba->utrdl))),
REG_UTP_TRANSFER_REQ_LIST_BASE_H);
ufshcd_writel(hba, lower_32_bits((dma_addr_t)hba->utmrdl),
ufshcd_writel(hba, lower_32_bits(dev_phys_to_bus(hba->dev, (phys_addr_t)(uintptr_t)(hba->utmrdl))),
REG_UTP_TASK_REQ_LIST_BASE_L);
ufshcd_writel(hba, upper_32_bits((dma_addr_t)hba->utmrdl),
ufshcd_writel(hba, upper_32_bits(dev_phys_to_bus(hba->dev, (phys_addr_t)(uintptr_t)(hba->utmrdl))),
REG_UTP_TASK_REQ_LIST_BASE_H);
/*
@@ -660,7 +661,7 @@ static void ufshcd_host_memory_configure(struct ufs_hba *hba)
u16 prdt_offset;
utrdlp = hba->utrdl;
cmd_desc_dma_addr = (dma_addr_t)hba->ucdl;
cmd_desc_dma_addr = dev_phys_to_bus(hba->dev, (phys_addr_t)(uintptr_t)(hba->ucdl));
utrdlp->command_desc_base_addr_lo =
cpu_to_le32(lower_32_bits(cmd_desc_dma_addr));
@@ -1612,12 +1613,15 @@ void ufshcd_prepare_utp_scsi_cmd_upiu(struct ufs_hba *hba,
ufshcd_cache_flush(hba->ucd_rsp_ptr, sizeof(*hba->ucd_rsp_ptr));
}
static inline void prepare_prdt_desc(struct ufshcd_sg_entry *entry,
static inline void prepare_prdt_desc(struct ufs_hba *hba,
struct ufshcd_sg_entry *entry,
unsigned char *buf, ulong len)
{
dma_addr_t da = dev_phys_to_bus(hba->dev, (phys_addr_t)(uintptr_t)buf);
entry->size = cpu_to_le32(len) | GENMASK(1, 0);
entry->base_addr = cpu_to_le32(lower_32_bits((unsigned long)buf));
entry->upper_addr = cpu_to_le32(upper_32_bits((unsigned long)buf));
entry->base_addr = cpu_to_le32(lower_32_bits(da));
entry->upper_addr = cpu_to_le32(upper_32_bits(da));
}
static void prepare_prdt_table(struct ufs_hba *hba, struct scsi_cmd *pccb)
@@ -1639,13 +1643,13 @@ static void prepare_prdt_table(struct ufs_hba *hba, struct scsi_cmd *pccb)
buf = pccb->pdata;
i = table_length;
while (--i) {
prepare_prdt_desc(&prd_table[table_length - i - 1], buf,
prepare_prdt_desc(hba, &prd_table[table_length - i - 1], buf,
MAX_PRDT_ENTRY - 1);
buf += MAX_PRDT_ENTRY;
datalen -= MAX_PRDT_ENTRY;
}
prepare_prdt_desc(&prd_table[table_length - i - 1], buf, datalen - 1);
prepare_prdt_desc(hba, &prd_table[table_length - i - 1], buf, datalen - 1);
req_desc->prd_table_length = table_length;
ufshcd_cache_flush(prd_table, sizeof(*prd_table) * table_length);