On 09/26/2013 07:42 AM, Anand wrote:
> From 4715339743d45a6ef862bc0f5d5ec404b4667f94 Mon Sep 17 00:00:00 2001
> From: Anand Kumar Santhanam <anandkumar.santha...@pmcs.com>
> Date: Wed, 18 Sep 2013 11:14:54 +0530
> Subject: [PATCH V2 09/10] pm80xx: 4G boundary fix.
>
> Signed-off-by: anandkumar.santha...@pmcs.com
>
Please give more description why you do this change?
Thanks
Jack
> ---
> drivers/scsi/pm8001/pm80xx_hwi.c | 103
> +++++++++++++++++++++++++++++++++++++-
> 1 files changed, 101 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/scsi/pm8001/pm80xx_hwi.c
> b/drivers/scsi/pm8001/pm80xx_hwi.c
> index ce59d0d..94de2ed 100644
> --- a/drivers/scsi/pm8001/pm80xx_hwi.c
> +++ b/drivers/scsi/pm8001/pm80xx_hwi.c
> @@ -3713,7 +3713,8 @@ static int pm80xx_chip_ssp_io_req(struct
> pm8001_hba_info *pm8001_ha,
> struct ssp_ini_io_start_req ssp_cmd;
> u32 tag = ccb->ccb_tag;
> int ret;
> - u64 phys_addr;
> + u64 phys_addr, start_addr, end_addr;
> + u32 end_addr_high, end_addr_low;
> struct inbound_queue_table *circularQ;
> u32 q_index;
> u32 opc = OPC_INB_SSPINIIOSTART;
> @@ -3767,6 +3768,30 @@ static int pm80xx_chip_ssp_io_req(struct
> pm8001_hba_info *pm8001_ha,
> cpu_to_le32(upper_32_bits(dma_addr));
> ssp_cmd.enc_len = cpu_to_le32(task->total_xfer_len);
> ssp_cmd.enc_esgl = 0;
> + /* Check 4G Boundary */
> + start_addr = cpu_to_le64(dma_addr);
> + end_addr = (start_addr + ssp_cmd.enc_len) - 1;
> + end_addr_low = cpu_to_le32(lower_32_bits(end_addr));
> + end_addr_high = cpu_to_le32(upper_32_bits(end_addr));
> + if (end_addr_high != ssp_cmd.enc_addr_high) {
> + PM8001_FAIL_DBG(pm8001_ha,
> + pm8001_printk("The sg list address "
> + "start_addr=0x%016llx data_len=0x%x "
> + "end_addr_high=0x%08x end_addr_low="
> + "0x%08x has crossed 4G boundary\n",
> + start_addr, ssp_cmd.enc_len,
> + end_addr_high, end_addr_low));
> + pm8001_chip_make_sg(task->scatter, 1,
> + ccb->buf_prd);
> + phys_addr = ccb->ccb_dma_handle +
> + offsetof(struct pm8001_ccb_info,
> + buf_prd[0]);
> + ssp_cmd.enc_addr_low =
> + cpu_to_le32(lower_32_bits(phys_addr));
> + ssp_cmd.enc_addr_high =
> + cpu_to_le32(upper_32_bits(phys_addr));
> + ssp_cmd.enc_esgl = cpu_to_le32(1<<31);
> + }
> } else if (task->num_scatter == 0) {
> ssp_cmd.enc_addr_low = 0;
> ssp_cmd.enc_addr_high = 0;
> @@ -3802,6 +3827,30 @@ static int pm80xx_chip_ssp_io_req(struct
> pm8001_hba_info *pm8001_ha,
> cpu_to_le32(upper_32_bits(dma_addr));
> ssp_cmd.len = cpu_to_le32(task->total_xfer_len);
> ssp_cmd.esgl = 0;
> + /* Check 4G Boundary */
> + start_addr = cpu_to_le64(dma_addr);
> + end_addr = (start_addr + ssp_cmd.len) - 1;
> + end_addr_low = cpu_to_le32(lower_32_bits(end_addr));
> + end_addr_high = cpu_to_le32(upper_32_bits(end_addr));
> + if (end_addr_high != ssp_cmd.addr_high) {
> + PM8001_FAIL_DBG(pm8001_ha,
> + pm8001_printk("The sg list address "
> + "start_addr=0x%016llx data_len=0x%x "
> + "end_addr_high=0x%08x end_addr_low="
> + "0x%08x has crossed 4G boundary\n",
> + start_addr, ssp_cmd.len,
> + end_addr_high, end_addr_low));
> + pm8001_chip_make_sg(task->scatter, 1,
> + ccb->buf_prd);
> + phys_addr = ccb->ccb_dma_handle +
> + offsetof(struct pm8001_ccb_info,
> + buf_prd[0]);
> + ssp_cmd.addr_low =
> + cpu_to_le32(lower_32_bits(phys_addr));
> + ssp_cmd.addr_high =
> + cpu_to_le32(upper_32_bits(phys_addr));
> + ssp_cmd.esgl = cpu_to_le32(1<<31);
> + }
> } else if (task->num_scatter == 0) {
> ssp_cmd.addr_low = 0;
> ssp_cmd.addr_high = 0;
> @@ -3826,7 +3875,8 @@ static int pm80xx_chip_sata_req(struct pm8001_hba_info
> *pm8001_ha,
> u32 q_index;
> struct sata_start_req sata_cmd;
> u32 hdr_tag, ncg_tag = 0;
> - u64 phys_addr;
> + u64 phys_addr, start_addr, end_addr;
> + u32 end_addr_high, end_addr_low;
> u32 ATAP = 0x0;
> u32 dir;
> struct inbound_queue_table *circularQ;
> @@ -3895,6 +3945,31 @@ static int pm80xx_chip_sata_req(struct pm8001_hba_info
> *pm8001_ha,
> sata_cmd.enc_addr_high = upper_32_bits(dma_addr);
> sata_cmd.enc_len = cpu_to_le32(task->total_xfer_len);
> sata_cmd.enc_esgl = 0;
> + /* Check 4G Boundary */
> + start_addr = cpu_to_le64(dma_addr);
> + end_addr = (start_addr + sata_cmd.enc_len) - 1;
> + end_addr_low = cpu_to_le32(lower_32_bits(end_addr));
> + end_addr_high = cpu_to_le32(upper_32_bits(end_addr));
> + if (end_addr_high != sata_cmd.enc_addr_high) {
> + PM8001_FAIL_DBG(pm8001_ha,
> + pm8001_printk("The sg list address "
> + "start_addr=0x%016llx data_len=0x%x "
> + "end_addr_high=0x%08x end_addr_low"
> + "=0x%08x has crossed 4G boundary\n",
> + start_addr, sata_cmd.enc_len,
> + end_addr_high, end_addr_low));
> + pm8001_chip_make_sg(task->scatter, 1,
> + ccb->buf_prd);
> + phys_addr = ccb->ccb_dma_handle +
> + offsetof(struct pm8001_ccb_info,
> + buf_prd[0]);
> + sata_cmd.enc_addr_low =
> + lower_32_bits(phys_addr);
> + sata_cmd.enc_addr_high =
> + upper_32_bits(phys_addr);
> + sata_cmd.enc_esgl =
> + cpu_to_le32(1 << 31);
> + }
> } else if (task->num_scatter == 0) {
> sata_cmd.enc_addr_low = 0;
> sata_cmd.enc_addr_high = 0;
> @@ -3936,6 +4011,30 @@ static int pm80xx_chip_sata_req(struct pm8001_hba_info
> *pm8001_ha,
> sata_cmd.addr_high = upper_32_bits(dma_addr);
> sata_cmd.len = cpu_to_le32(task->total_xfer_len);
> sata_cmd.esgl = 0;
> + /* Check 4G Boundary */
> + start_addr = cpu_to_le64(dma_addr);
> + end_addr = (start_addr + sata_cmd.len) - 1;
> + end_addr_low = cpu_to_le32(lower_32_bits(end_addr));
> + end_addr_high = cpu_to_le32(upper_32_bits(end_addr));
> + if (end_addr_high != sata_cmd.addr_high) {
> + PM8001_FAIL_DBG(pm8001_ha,
> + pm8001_printk("The sg list address "
> + "start_addr=0x%016llx data_len=0x%x"
> + "end_addr_high=0x%08x end_addr_low="
> + "0x%08x has crossed 4G boundary\n",
> + start_addr, sata_cmd.len,
> + end_addr_high, end_addr_low));
> + pm8001_chip_make_sg(task->scatter, 1,
> + ccb->buf_prd);
> + phys_addr = ccb->ccb_dma_handle +
> + offsetof(struct pm8001_ccb_info,
> + buf_prd[0]);
> + sata_cmd.addr_low =
> + lower_32_bits(phys_addr);
> + sata_cmd.addr_high =
> + upper_32_bits(phys_addr);
> + sata_cmd.esgl = cpu_to_le32(1 << 31);
> + }
> } else if (task->num_scatter == 0) {
> sata_cmd.addr_low = 0;
> sata_cmd.addr_high = 0;
>
--
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