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-rw-r--r--drivers/scsi/isci/request.c147
-rw-r--r--drivers/scsi/isci/request.h84
2 files changed, 89 insertions, 142 deletions
diff --git a/drivers/scsi/isci/request.c b/drivers/scsi/isci/request.c
index 3c7ed4e61b4a..8520626b02fa 100644
--- a/drivers/scsi/isci/request.c
+++ b/drivers/scsi/isci/request.c
@@ -433,24 +433,20 @@ static enum sci_status
scic_sds_stp_pio_request_construct(struct scic_sds_request *sci_req,
bool copy_rx_frame)
{
- struct scic_sds_stp_request *stp_req = &sci_req->stp.req;
- struct scic_sds_stp_pio_request *pio = &stp_req->type.pio;
+ struct isci_stp_request *stp_req = &sci_req->stp.req;
scu_stp_raw_request_construct_task_context(sci_req);
- pio->current_transfer_bytes = 0;
- pio->ending_error = 0;
- pio->ending_status = 0;
-
- pio->request_current.sgl_offset = 0;
- pio->request_current.sgl_set = SCU_SGL_ELEMENT_PAIR_A;
+ stp_req->status = 0;
+ stp_req->sgl.offset = 0;
+ stp_req->sgl.set = SCU_SGL_ELEMENT_PAIR_A;
if (copy_rx_frame) {
scic_sds_request_build_sgl(sci_req);
- pio->request_current.sgl_index = 0;
+ stp_req->sgl.index = 0;
} else {
/* The user does not want the data copied to the SGL buffer location */
- pio->request_current.sgl_index = -1;
+ stp_req->sgl.index = -1;
}
return SCI_SUCCESS;
@@ -1151,22 +1147,22 @@ void scic_stp_io_request_set_ncq_tag(struct scic_sds_request *req,
req->tc->type.stp.ncq_tag = ncq_tag;
}
-static struct scu_sgl_element *pio_sgl_next(struct scic_sds_stp_request *stp_req)
+static struct scu_sgl_element *pio_sgl_next(struct isci_stp_request *stp_req)
{
struct scu_sgl_element *sgl;
struct scu_sgl_element_pair *sgl_pair;
struct scic_sds_request *sci_req = to_sci_req(stp_req);
- struct scic_sds_request_pio_sgl *pio_sgl = &stp_req->type.pio.request_current;
+ struct isci_stp_pio_sgl *pio_sgl = &stp_req->sgl;
- sgl_pair = to_sgl_element_pair(sci_req, pio_sgl->sgl_index);
+ sgl_pair = to_sgl_element_pair(sci_req, pio_sgl->index);
if (!sgl_pair)
sgl = NULL;
- else if (pio_sgl->sgl_set == SCU_SGL_ELEMENT_PAIR_A) {
+ else if (pio_sgl->set == SCU_SGL_ELEMENT_PAIR_A) {
if (sgl_pair->B.address_lower == 0 &&
sgl_pair->B.address_upper == 0) {
sgl = NULL;
} else {
- pio_sgl->sgl_set = SCU_SGL_ELEMENT_PAIR_B;
+ pio_sgl->set = SCU_SGL_ELEMENT_PAIR_B;
sgl = &sgl_pair->B;
}
} else {
@@ -1174,9 +1170,9 @@ static struct scu_sgl_element *pio_sgl_next(struct scic_sds_stp_request *stp_req
sgl_pair->next_pair_upper == 0) {
sgl = NULL;
} else {
- pio_sgl->sgl_index++;
- pio_sgl->sgl_set = SCU_SGL_ELEMENT_PAIR_A;
- sgl_pair = to_sgl_element_pair(sci_req, pio_sgl->sgl_index);
+ pio_sgl->index++;
+ pio_sgl->set = SCU_SGL_ELEMENT_PAIR_A;
+ sgl_pair = to_sgl_element_pair(sci_req, pio_sgl->index);
sgl = &sgl_pair->A;
}
}
@@ -1221,7 +1217,7 @@ static enum sci_status scic_sds_stp_request_pio_data_out_trasmit_data_frame(
struct scic_sds_request *sci_req,
u32 length)
{
- struct scic_sds_stp_request *stp_req = &sci_req->stp.req;
+ struct isci_stp_request *stp_req = &sci_req->stp.req;
struct scu_task_context *task_context = sci_req->tc;
struct scu_sgl_element_pair *sgl_pair;
struct scu_sgl_element *current_sgl;
@@ -1229,8 +1225,8 @@ static enum sci_status scic_sds_stp_request_pio_data_out_trasmit_data_frame(
/* Recycle the TC and reconstruct it for sending out DATA FIS containing
* for the data from current_sgl+offset for the input length
*/
- sgl_pair = to_sgl_element_pair(sci_req, stp_req->type.pio.request_current.sgl_index);
- if (stp_req->type.pio.request_current.sgl_set == SCU_SGL_ELEMENT_PAIR_A)
+ sgl_pair = to_sgl_element_pair(sci_req, stp_req->sgl.index);
+ if (stp_req->sgl.set == SCU_SGL_ELEMENT_PAIR_A)
current_sgl = &sgl_pair->A;
else
current_sgl = &sgl_pair->B;
@@ -1247,54 +1243,48 @@ static enum sci_status scic_sds_stp_request_pio_data_out_trasmit_data_frame(
static enum sci_status scic_sds_stp_request_pio_data_out_transmit_data(struct scic_sds_request *sci_req)
{
-
- struct scu_sgl_element *current_sgl;
- u32 sgl_offset;
- u32 remaining_bytes_in_current_sgl = 0;
- enum sci_status status = SCI_SUCCESS;
- struct scic_sds_stp_request *stp_req = &sci_req->stp.req;
+ struct isci_stp_request *stp_req = &sci_req->stp.req;
struct scu_sgl_element_pair *sgl_pair;
+ struct scu_sgl_element *sgl;
+ enum sci_status status;
+ u32 offset;
+ u32 len = 0;
- sgl_offset = stp_req->type.pio.request_current.sgl_offset;
- sgl_pair = to_sgl_element_pair(sci_req, stp_req->type.pio.request_current.sgl_index);
+ offset = stp_req->sgl.offset;
+ sgl_pair = to_sgl_element_pair(sci_req, stp_req->sgl.index);
if (WARN_ONCE(!sgl_pair, "%s: null sgl element", __func__))
return SCI_FAILURE;
- if (stp_req->type.pio.request_current.sgl_set == SCU_SGL_ELEMENT_PAIR_A) {
- current_sgl = &sgl_pair->A;
- remaining_bytes_in_current_sgl = sgl_pair->A.length - sgl_offset;
+ if (stp_req->sgl.set == SCU_SGL_ELEMENT_PAIR_A) {
+ sgl = &sgl_pair->A;
+ len = sgl_pair->A.length - offset;
} else {
- current_sgl = &sgl_pair->B;
- remaining_bytes_in_current_sgl = sgl_pair->B.length - sgl_offset;
+ sgl = &sgl_pair->B;
+ len = sgl_pair->B.length - offset;
}
- if (stp_req->type.pio.pio_transfer_bytes > 0) {
- if (stp_req->type.pio.pio_transfer_bytes >= remaining_bytes_in_current_sgl) {
- /* recycle the TC and send the H2D Data FIS from (current sgl + sgl_offset) and length = remaining_bytes_in_current_sgl */
- status = scic_sds_stp_request_pio_data_out_trasmit_data_frame(sci_req, remaining_bytes_in_current_sgl);
- if (status == SCI_SUCCESS) {
- stp_req->type.pio.pio_transfer_bytes -= remaining_bytes_in_current_sgl;
-
- /* update the current sgl, sgl_offset and save for future */
- current_sgl = pio_sgl_next(stp_req);
- sgl_offset = 0;
- }
- } else if (stp_req->type.pio.pio_transfer_bytes < remaining_bytes_in_current_sgl) {
- /* recycle the TC and send the H2D Data FIS from (current sgl + sgl_offset) and length = type.pio.pio_transfer_bytes */
- scic_sds_stp_request_pio_data_out_trasmit_data_frame(sci_req, stp_req->type.pio.pio_transfer_bytes);
+ if (stp_req->pio_len == 0)
+ return SCI_SUCCESS;
- if (status == SCI_SUCCESS) {
- /* Sgl offset will be adjusted and saved for future */
- sgl_offset += stp_req->type.pio.pio_transfer_bytes;
- current_sgl->address_lower += stp_req->type.pio.pio_transfer_bytes;
- stp_req->type.pio.pio_transfer_bytes = 0;
- }
- }
+ if (stp_req->pio_len >= len) {
+ status = scic_sds_stp_request_pio_data_out_trasmit_data_frame(sci_req, len);
+ if (status != SCI_SUCCESS)
+ return status;
+ stp_req->pio_len -= len;
+
+ /* update the current sgl, offset and save for future */
+ sgl = pio_sgl_next(stp_req);
+ offset = 0;
+ } else if (stp_req->pio_len < len) {
+ scic_sds_stp_request_pio_data_out_trasmit_data_frame(sci_req, stp_req->pio_len);
+
+ /* Sgl offset will be adjusted and saved for future */
+ offset += stp_req->pio_len;
+ sgl->address_lower += stp_req->pio_len;
+ stp_req->pio_len = 0;
}
- if (status == SCI_SUCCESS) {
- stp_req->type.pio.request_current.sgl_offset = sgl_offset;
- }
+ stp_req->sgl.offset = offset;
return status;
}
@@ -1309,7 +1299,7 @@ static enum sci_status scic_sds_stp_request_pio_data_out_transmit_data(struct sc
* specified data region. enum sci_status
*/
static enum sci_status
-scic_sds_stp_request_pio_data_in_copy_data_buffer(struct scic_sds_stp_request *stp_req,
+scic_sds_stp_request_pio_data_in_copy_data_buffer(struct isci_stp_request *stp_req,
u8 *data_buf, u32 len)
{
struct scic_sds_request *sci_req;
@@ -1356,7 +1346,7 @@ scic_sds_stp_request_pio_data_in_copy_data_buffer(struct scic_sds_stp_request *s
* Copy the data buffer to the io request data region. enum sci_status
*/
static enum sci_status scic_sds_stp_request_pio_data_in_copy_data(
- struct scic_sds_stp_request *sci_req,
+ struct isci_stp_request *stp_req,
u8 *data_buffer)
{
enum sci_status status;
@@ -1364,19 +1354,19 @@ static enum sci_status scic_sds_stp_request_pio_data_in_copy_data(
/*
* If there is less than 1K remaining in the transfer request
* copy just the data for the transfer */
- if (sci_req->type.pio.pio_transfer_bytes < SCU_MAX_FRAME_BUFFER_SIZE) {
+ if (stp_req->pio_len < SCU_MAX_FRAME_BUFFER_SIZE) {
status = scic_sds_stp_request_pio_data_in_copy_data_buffer(
- sci_req, data_buffer, sci_req->type.pio.pio_transfer_bytes);
+ stp_req, data_buffer, stp_req->pio_len);
if (status == SCI_SUCCESS)
- sci_req->type.pio.pio_transfer_bytes = 0;
+ stp_req->pio_len = 0;
} else {
/* We are transfering the whole frame so copy */
status = scic_sds_stp_request_pio_data_in_copy_data_buffer(
- sci_req, data_buffer, SCU_MAX_FRAME_BUFFER_SIZE);
+ stp_req, data_buffer, SCU_MAX_FRAME_BUFFER_SIZE);
if (status == SCI_SUCCESS)
- sci_req->type.pio.pio_transfer_bytes -= SCU_MAX_FRAME_BUFFER_SIZE;
+ stp_req->pio_len -= SCU_MAX_FRAME_BUFFER_SIZE;
}
return status;
@@ -1419,18 +1409,18 @@ pio_data_out_tx_done_tc_event(struct scic_sds_request *sci_req,
{
enum sci_status status = SCI_SUCCESS;
bool all_frames_transferred = false;
- struct scic_sds_stp_request *stp_req = &sci_req->stp.req;
+ struct isci_stp_request *stp_req = &sci_req->stp.req;
switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) {
case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD):
/* Transmit data */
- if (stp_req->type.pio.pio_transfer_bytes != 0) {
+ if (stp_req->pio_len != 0) {
status = scic_sds_stp_request_pio_data_out_transmit_data(sci_req);
if (status == SCI_SUCCESS) {
- if (stp_req->type.pio.pio_transfer_bytes == 0)
+ if (stp_req->pio_len == 0)
all_frames_transferred = true;
}
- } else if (stp_req->type.pio.pio_transfer_bytes == 0) {
+ } else if (stp_req->pio_len == 0) {
/*
* this will happen if the all data is written at the
* first time after the pio setup fis is received
@@ -1507,7 +1497,7 @@ scic_sds_io_request_frame_handler(struct scic_sds_request *sci_req,
u32 frame_index)
{
struct scic_sds_controller *scic = sci_req->owning_controller;
- struct scic_sds_stp_request *stp_req = &sci_req->stp.req;
+ struct isci_stp_request *stp_req = &sci_req->stp.req;
enum sci_base_request_states state;
enum sci_status status;
ssize_t word_cnt;
@@ -1727,16 +1717,16 @@ scic_sds_io_request_frame_handler(struct scic_sds_request *sci_req,
*/
/* transfer_count: first 16bits in the 4th dword */
- stp_req->type.pio.pio_transfer_bytes = frame_buffer[3] & 0xffff;
+ stp_req->pio_len = frame_buffer[3] & 0xffff;
- /* ending_status: 4th byte in the 3rd dword */
- stp_req->type.pio.ending_status = (frame_buffer[2] >> 24) & 0xff;
+ /* status: 4th byte in the 3rd dword */
+ stp_req->status = (frame_buffer[2] >> 24) & 0xff;
scic_sds_controller_copy_sata_response(&sci_req->stp.rsp,
frame_header,
frame_buffer);
- sci_req->stp.rsp.status = stp_req->type.pio.ending_status;
+ sci_req->stp.rsp.status = stp_req->status;
/* The next state is dependent on whether the
* request was PIO Data-in or Data out
@@ -1839,9 +1829,9 @@ scic_sds_io_request_frame_handler(struct scic_sds_request *sci_req,
return status;
}
- if (stp_req->type.pio.request_current.sgl_index < 0) {
+ if (stp_req->sgl.index < 0) {
sci_req->saved_rx_frame_index = frame_index;
- stp_req->type.pio.pio_transfer_bytes = 0;
+ stp_req->pio_len = 0;
} else {
scic_sds_unsolicited_frame_control_get_buffer(&scic->uf_control,
frame_index,
@@ -1857,11 +1847,10 @@ scic_sds_io_request_frame_handler(struct scic_sds_request *sci_req,
/* Check for the end of the transfer, are there more
* bytes remaining for this data transfer
*/
- if (status != SCI_SUCCESS ||
- stp_req->type.pio.pio_transfer_bytes != 0)
+ if (status != SCI_SUCCESS || stp_req->pio_len != 0)
return status;
- if ((stp_req->type.pio.ending_status & ATA_BUSY) == 0) {
+ if ((stp_req->status & ATA_BUSY) == 0) {
scic_sds_request_set_status(sci_req,
SCU_TASK_DONE_CHECK_RESPONSE,
SCI_FAILURE_IO_RESPONSE_VALID);
diff --git a/drivers/scsi/isci/request.h b/drivers/scsi/isci/request.h
index 7628decbd535..7fd98531d1f2 100644
--- a/drivers/scsi/isci/request.h
+++ b/drivers/scsi/isci/request.h
@@ -89,67 +89,25 @@ enum sci_request_protocol {
SCIC_STP_PROTOCOL
}; /* XXX remove me, use sas_task.{dev|task_proto} instead */;
-struct scic_sds_stp_request {
- union {
- u32 ncq;
-
- u32 udma;
-
- struct scic_sds_stp_pio_request {
- /*
- * Total transfer for the entire PIO request recorded
- * at request constuction time.
- *
- * @todo Should we just decrement this value for each
- * byte of data transitted or received to elemenate
- * the current_transfer_bytes field?
- */
- u32 total_transfer_bytes;
-
- /*
- * Total number of bytes received/transmitted in data
- * frames since the start of the IO request. At the
- * end of the IO request this should equal the
- * total_transfer_bytes.
- */
- u32 current_transfer_bytes;
-
- /*
- * The number of bytes requested in the in the PIO
- * setup.
- */
- u32 pio_transfer_bytes;
-
- /*
- * PIO Setup ending status value to tell us if we need
- * to wait for another FIS or if the transfer is
- * complete. On the receipt of a D2H FIS this will be
- * the status field of that FIS.
- */
- u8 ending_status;
-
- /*
- * On receipt of a D2H FIS this will be the ending
- * error field if the ending_status has the
- * SATA_STATUS_ERR bit set.
- */
- u8 ending_error;
-
- struct scic_sds_request_pio_sgl {
- int sgl_index;
- u8 sgl_set;
- u32 sgl_offset;
- } request_current;
- } pio;
-
- struct {
- /*
- * The number of bytes requested in the PIO setup
- * before CDB data frame.
- */
- u32 device_preferred_cdb_length;
- } packet;
- } type;
+/**
+ * isci_stp_request - extra request infrastructure to handle pio/atapi protocol
+ * @pio_len - number of bytes requested at PIO setup
+ * @status - pio setup ending status value to tell us if we need
+ * to wait for another fis or if the transfer is complete. Upon
+ * receipt of a d2h fis this will be the status field of that fis.
+ * @sgl - track pio transfer progress as we iterate through the sgl
+ * @device_cdb_len - atapi device advertises it's transfer constraints at setup
+ */
+struct isci_stp_request {
+ u32 pio_len;
+ u8 status;
+
+ struct isci_stp_pio_sgl {
+ int index;
+ u8 set;
+ u32 offset;
+ } sgl;
+ u32 device_cdb_len;
};
struct scic_sds_request {
@@ -235,14 +193,14 @@ struct scic_sds_request {
} smp;
struct {
- struct scic_sds_stp_request req;
+ struct isci_stp_request req;
struct host_to_dev_fis cmd;
struct dev_to_host_fis rsp;
} stp;
};
};
-static inline struct scic_sds_request *to_sci_req(struct scic_sds_stp_request *stp_req)
+static inline struct scic_sds_request *to_sci_req(struct isci_stp_request *stp_req)
{
struct scic_sds_request *sci_req;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-27 19:00:09 +0100