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ANDROID: scsi: ufs: allow ufs variants to override sg entry size

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Modify the UFSHCD core to allow 'struct ufshcd_sg_entry' to be
variable-length.  The default is the standard length, but variants can
override ufs_hba::sg_entry_size with a larger value if there are
vendor-specific fields following the standard ones.

This is needed to support inline encryption with ufs-exynos (FMP).

Bug: 129991660
Change-Id: I6ab9458d5c23331013e6b736d6fea378a6b5b86c
Signed-off-by: Eric Biggers <ebiggers@google.com>
This commit is contained in:
Eric Biggers
2020-02-24 14:37:12 -08:00
parent f4bdd2d3e4
commit 8de80df7d7
3 changed files with 29 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
drivers/scsi/ufs/ufshcd.c
View File

@@ -467,7 +467,7 @@ void ufshcd_print_trs(struct ufs_hba *hba, unsigned long bitmap, bool pr_prdt)
prdt_length =
le16_to_cpu(lrbp->utr_descriptor_ptr->prd_table_length);
if (hba->quirks & UFSHCD_QUIRK_PRDT_BYTE_GRAN)
prdt_length /= sizeof(struct ufshcd_sg_entry);
prdt_length /= hba->sg_entry_size;
dev_err(hba->dev,
"UPIU[%d] - PRDT - %d entries phys@0x%llx\n",
@@ -476,7 +476,7 @@ void ufshcd_print_trs(struct ufs_hba *hba, unsigned long bitmap, bool pr_prdt)
if (pr_prdt)
ufshcd_hex_dump("UPIU PRDT: ", lrbp->ucd_prdt_ptr,
sizeof(struct ufshcd_sg_entry) * prdt_length);
hba->sg_entry_size * prdt_length);
}
}
@@ -2125,7 +2125,7 @@ int ufshcd_send_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd)
*/
static int ufshcd_map_sg(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
{
struct ufshcd_sg_entry *prd_table;
struct ufshcd_sg_entry *prd;
struct scatterlist *sg;
struct scsi_cmnd *cmd;
int sg_segments;
@@ -2140,21 +2140,22 @@ static int ufshcd_map_sg(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
if (hba->quirks & UFSHCD_QUIRK_PRDT_BYTE_GRAN)
lrbp->utr_descriptor_ptr->prd_table_length =
cpu_to_le16((u16)(sg_segments *
sizeof(struct ufshcd_sg_entry)));
hba->sg_entry_size));
else
lrbp->utr_descriptor_ptr->prd_table_length =
cpu_to_le16((u16) (sg_segments));
prd_table = (struct ufshcd_sg_entry *)lrbp->ucd_prdt_ptr;
prd = (struct ufshcd_sg_entry *)lrbp->ucd_prdt_ptr;
scsi_for_each_sg(cmd, sg, sg_segments, i) {
prd_table[i].size =
prd->size =
cpu_to_le32(((u32) sg_dma_len(sg))-1);
prd_table[i].base_addr =
prd->base_addr =
cpu_to_le32(lower_32_bits(sg->dma_address));
prd_table[i].upper_addr =
prd->upper_addr =
cpu_to_le32(upper_32_bits(sg->dma_address));
prd_table[i].reserved = 0;
prd->reserved = 0;
prd = (void *)prd + hba->sg_entry_size;
}
} else {
lrbp->utr_descriptor_ptr->prd_table_length = 0;
@@ -3393,7 +3394,7 @@ static int ufshcd_memory_alloc(struct ufs_hba *hba)
size_t utmrdl_size, utrdl_size, ucdl_size;
/* Allocate memory for UTP command descriptors */
ucdl_size = (sizeof(struct utp_transfer_cmd_desc) * hba->nutrs);
ucdl_size = (sizeof_utp_transfer_cmd_desc(hba) * hba->nutrs);
hba->ucdl_base_addr = dmam_alloc_coherent(hba->dev,
ucdl_size,
&hba->ucdl_dma_addr,
@@ -3489,7 +3490,7 @@ static void ufshcd_host_memory_configure(struct ufs_hba *hba)
prdt_offset =
offsetof(struct utp_transfer_cmd_desc, prd_table);
cmd_desc_size = sizeof(struct utp_transfer_cmd_desc);
cmd_desc_size = sizeof_utp_transfer_cmd_desc(hba);
cmd_desc_dma_addr = hba->ucdl_dma_addr;
for (i = 0; i < hba->nutrs; i++) {
@@ -3521,17 +3522,17 @@ static void ufshcd_host_memory_configure(struct ufs_hba *hba)
hba->lrb[i].utr_descriptor_ptr = (utrdlp + i);
hba->lrb[i].utrd_dma_addr = hba->utrdl_dma_addr +
(i * sizeof(struct utp_transfer_req_desc));
hba->lrb[i].ucd_req_ptr =
(struct utp_upiu_req *)(cmd_descp + i);
hba->lrb[i].ucd_req_ptr = (struct utp_upiu_req *)cmd_descp;
hba->lrb[i].ucd_req_dma_addr = cmd_desc_element_addr;
hba->lrb[i].ucd_rsp_ptr =
(struct utp_upiu_rsp *)cmd_descp[i].response_upiu;
(struct utp_upiu_rsp *)cmd_descp->response_upiu;
hba->lrb[i].ucd_rsp_dma_addr = cmd_desc_element_addr +
response_offset;
hba->lrb[i].ucd_prdt_ptr =
(struct ufshcd_sg_entry *)cmd_descp[i].prd_table;
(struct ufshcd_sg_entry *)cmd_descp->prd_table;
hba->lrb[i].ucd_prdt_dma_addr = cmd_desc_element_addr +
prdt_offset;
cmd_descp = (void *)cmd_descp + cmd_desc_size;
}
}
@@ -8495,6 +8496,7 @@ int ufshcd_alloc_host(struct device *dev, struct ufs_hba **hba_handle)
hba->dev = dev;
*hba_handle = hba;
hba->dev_ref_clk_freq = REF_CLK_FREQ_INVAL;
hba->sg_entry_size = sizeof(struct ufshcd_sg_entry);
INIT_LIST_HEAD(&hba->clk_list_head);

2
drivers/scsi/ufs/ufshcd.h
View File

@@ -525,6 +525,7 @@ struct ufs_stats {
* @ufs_version: UFS Version to which controller complies
* @vops: pointer to variant specific operations
* @priv: pointer to variant specific private data
* @sg_entry_size: size of struct ufshcd_sg_entry (may include variant fields)
* @irq: Irq number of the controller
* @active_uic_cmd: handle of active UIC command
* @uic_cmd_mutex: mutex for uic command
@@ -608,6 +609,7 @@ struct ufs_hba {
const struct ufs_hba_variant_ops *vops;
void *priv;
const struct ufs_hba_crypto_variant_ops *crypto_vops;
size_t sg_entry_size;
unsigned int irq;
bool is_irq_enabled;
enum ufs_ref_clk_freq dev_ref_clk_freq;

12
drivers/scsi/ufs/ufshci.h
View File

@@ -442,20 +442,28 @@ struct ufshcd_sg_entry {
__le32 upper_addr;
__le32 reserved;
__le32 size;
/*
* followed by variant-specific fields if
* hba->sg_entry_size != sizeof(struct ufshcd_sg_entry)
*/
};
/**
* struct utp_transfer_cmd_desc - UFS Command Descriptor structure
* @command_upiu: Command UPIU Frame address
* @response_upiu: Response UPIU Frame address
* @prd_table: Physical Region Descriptor
* @prd_table: Physical Region Descriptor: an array of SG_ALL struct
* ufshcd_sg_entry's. Variant-specific fields may be present after each.
*/
struct utp_transfer_cmd_desc {
u8 command_upiu[ALIGNED_UPIU_SIZE];
u8 response_upiu[ALIGNED_UPIU_SIZE];
struct ufshcd_sg_entry prd_table[SG_ALL];
u8 prd_table[];
};
#define sizeof_utp_transfer_cmd_desc(hba) \
(sizeof(struct utp_transfer_cmd_desc) + SG_ALL * (hba)->sg_entry_size)
/**
* struct request_desc_header - Descriptor Header common to both UTRD and UTMRD
* @dword0: Descriptor Header DW0