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Message-Id: <1333690265-27857-1-git-send-email-tqnguyen@apm.com>
Date: Fri, 6 Apr 2012 12:31:05 +0700
From: "Thang Q. Nguyen" <tqnguyen@....com>
To: Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Paul Mackerras <paulus@...ba.org>,
Jeff Garzik <jgarzik@...ox.com>,
Grant Likely <grant.likely@...retlab.ca>,
Rob Herring <rob.herring@...xeda.com>
Cc: Phong Vo <pvo@....com>, <linuxppc-dev@...ts.ozlabs.org>,
<linux-kernel@...r.kernel.org>, <linux-ide@...r.kernel.org>,
<devicetree-discuss@...ts.ozlabs.org>,
"Thang Q. Nguyen" <tqnguyen@....com>
Subject: [PATCH 1/1] [v3] Add support 2 SATA ports for Maui and change filename from sata_dwc_460ex.c to sata_dwc_4xx.c
Signed-off-by: Thang Q. Nguyen <tqnguyen@....com>
---
Changes for v2:
- Use git rename feature to change the driver to the newname and for
easier review.
Changes for v3:
- Remove materials not related to 2 SATA ports support. They will
be added in another patches.
drivers/ata/Makefile | 2 +-
drivers/ata/{sata_dwc_460ex.c => sata_dwc_4xx.c} | 820 +++++++++++-----------
2 files changed, 430 insertions(+), 392 deletions(-)
rename drivers/ata/{sata_dwc_460ex.c => sata_dwc_4xx.c} (73%)
diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
index 6ece5b7..d225c0c 100644
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -8,7 +8,7 @@ obj-$(CONFIG_SATA_AHCI_PLATFORM) += ahci_platform.o libahci.o
obj-$(CONFIG_SATA_FSL) += sata_fsl.o
obj-$(CONFIG_SATA_INIC162X) += sata_inic162x.o
obj-$(CONFIG_SATA_SIL24) += sata_sil24.o
-obj-$(CONFIG_SATA_DWC) += sata_dwc_460ex.o
+obj-$(CONFIG_SATA_DWC) += sata_dwc_4xx.o
# SFF w/ custom DMA
obj-$(CONFIG_PDC_ADMA) += pdc_adma.o
diff --git a/drivers/ata/sata_dwc_460ex.c b/drivers/ata/sata_dwc_4xx.c
similarity index 73%
rename from drivers/ata/sata_dwc_460ex.c
rename to drivers/ata/sata_dwc_4xx.c
index 69f7cde..07e9b36 100644
--- a/drivers/ata/sata_dwc_460ex.c
+++ b/drivers/ata/sata_dwc_4xx.c
@@ -1,6 +1,4 @@
/*
- * drivers/ata/sata_dwc_460ex.c
- *
* Synopsys DesignWare Cores (DWC) SATA host driver
*
* Author: Mark Miesfeld <mmiesfeld@...c.com>
@@ -16,6 +14,15 @@
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
+ *
+ * CHANGES:
+ * - Version 1.4:
+ * + Change filename from sata_dwc_460ex.c to sata_dwc_4xx.c
+ * + This driver supports more than one SATA port. Each SATA port has its
+ * own private attribute. Move sata_dwc_host_priv structure to
+ * sata_dwc_device and sata_dwc_device_port structures.
+ * + Change to use ata_bmdma_qc_issue and ata_bmdma_error_handler because
+ * the ata_sff_qc_issue and ata_sff_error_handler no longer support DMA.
*/
#ifdef CONFIG_SATA_DWC_DEBUG
@@ -44,10 +51,10 @@
#undef DRV_NAME
#undef DRV_VERSION
#define DRV_NAME "sata-dwc"
-#define DRV_VERSION "1.3"
+#define DRV_VERSION "1.4"
/* SATA DMA driver Globals */
-#define DMA_NUM_CHANS 1
+#define DMA_NUM_CHANS 2
#define DMA_NUM_CHAN_REGS 8
/* SATA DMA Register definitions */
@@ -158,6 +165,7 @@ enum {
/* Assign HW handshaking interface (x) to destination / source peripheral */
#define DMA_CFG_HW_HS_DEST(int_num) (((int_num) & 0xF) << 11)
#define DMA_CFG_HW_HS_SRC(int_num) (((int_num) & 0xF) << 7)
+#define DMA_CFG_HW_CH_PRIOR(int_num) (((int_num) & 0xF) << 5)
#define DMA_LLP_LMS(addr, master) (((addr) & 0xfffffffc) | (master))
/*
@@ -268,22 +276,25 @@ enum {
<< 16)
struct sata_dwc_device {
struct device *dev; /* generic device struct */
- struct ata_probe_ent *pe; /* ptr to probe-ent */
struct ata_host *host;
u8 *reg_base;
struct sata_dwc_regs *sata_dwc_regs; /* DW Synopsys SATA specific */
int irq_dma;
+ u8 *scr_base;
+ int dma_channel; /* DWC SATA DMA channel */
+ int hostID;
};
#define SATA_DWC_QCMD_MAX 32
struct sata_dwc_device_port {
struct sata_dwc_device *hsdev;
- int cmd_issued[SATA_DWC_QCMD_MAX];
struct lli *llit[SATA_DWC_QCMD_MAX]; /* DMA LLI table */
dma_addr_t llit_dma[SATA_DWC_QCMD_MAX];
u32 dma_chan[SATA_DWC_QCMD_MAX];
int dma_pending[SATA_DWC_QCMD_MAX];
+ u32 sactive_issued;
+ u32 sactive_queued;
};
/*
@@ -300,41 +311,39 @@ struct sata_dwc_device_port {
#define HSDEV_FROM_HSDEVP(p) ((struct sata_dwc_device *)\
(hsdevp)->hsdev)
+/* Host Controller ID */
enum {
- SATA_DWC_CMD_ISSUED_NOT = 0,
- SATA_DWC_CMD_ISSUED_PEND = 1,
- SATA_DWC_CMD_ISSUED_EXEC = 2,
- SATA_DWC_CMD_ISSUED_NODATA = 3,
+ APM_460EX_SATA = 0,
+ APM_821XX_SATA = 1,
+};
+enum {
SATA_DWC_DMA_PENDING_NONE = 0,
SATA_DWC_DMA_PENDING_TX = 1,
SATA_DWC_DMA_PENDING_RX = 2,
};
-struct sata_dwc_host_priv {
- void __iomem *scr_addr_sstatus;
- u32 sata_dwc_sactive_issued ;
- u32 sata_dwc_sactive_queued ;
- u32 dma_interrupt_count;
- struct ahb_dma_regs *sata_dma_regs;
- struct device *dwc_dev;
-};
-struct sata_dwc_host_priv host_pvt;
+/* This is used for easier trace back when having DMA channel */
+static struct sata_dwc_device *dwc_dev_list[DMA_NUM_CHANS];
+
+/*
+ * As we have only one DMA controller, this will be set static and global
+ * for easier to access
+ */
+static struct ahb_dma_regs *sata_dma_regs;
+
/*
* Prototypes
*/
static void sata_dwc_bmdma_start_by_tag(struct ata_queued_cmd *qc, u8 tag);
static int sata_dwc_qc_complete(struct ata_port *ap, struct ata_queued_cmd *qc,
u32 check_status);
-static void sata_dwc_dma_xfer_complete(struct ata_port *ap, u32 check_status);
static void sata_dwc_port_stop(struct ata_port *ap);
static void sata_dwc_clear_dmacr(struct sata_dwc_device_port *hsdevp, u8 tag);
static int dma_dwc_init(struct sata_dwc_device *hsdev, int irq);
-static void dma_dwc_exit(struct sata_dwc_device *hsdev);
-static int dma_dwc_xfer_setup(struct scatterlist *sg, int num_elems,
- struct lli *lli, dma_addr_t dma_lli,
- void __iomem *addr, int dir);
+static int dma_dwc_xfer_setup(struct ata_port *ap, dma_addr_t dma_lli);
static void dma_dwc_xfer_start(int dma_ch);
+static irqreturn_t dma_dwc_interrupt(int irq, struct sata_dwc_device *hsdev);
static const char *get_prot_descript(u8 protocol)
{
@@ -372,15 +381,15 @@ static const char *get_dma_dir_descript(int dma_dir)
}
}
-static void sata_dwc_tf_dump(struct ata_taskfile *tf)
+static void sata_dwc_tf_dump(struct device *dwc_dev, struct ata_taskfile *tf)
{
- dev_vdbg(host_pvt.dwc_dev, "taskfile cmd: 0x%02x protocol: %s flags:"
+ dev_vdbg(dwc_dev, "taskfile cmd: 0x%02x protocol: %s flags:"
"0x%lx device: %x\n", tf->command,
get_prot_descript(tf->protocol), tf->flags, tf->device);
- dev_vdbg(host_pvt.dwc_dev, "feature: 0x%02x nsect: 0x%x lbal: 0x%x "
+ dev_vdbg(dwc_dev, "feature: 0x%02x nsect: 0x%x lbal: 0x%x "
"lbam: 0x%x lbah: 0x%x\n", tf->feature, tf->nsect, tf->lbal,
tf->lbam, tf->lbah);
- dev_vdbg(host_pvt.dwc_dev, "hob_feature: 0x%02x hob_nsect: 0x%x "
+ dev_vdbg(dwc_dev, "hob_feature: 0x%02x hob_nsect: 0x%x "
"hob_lbal: 0x%x hob_lbam: 0x%x hob_lbah: 0x%x\n",
tf->hob_feature, tf->hob_nsect, tf->hob_lbal, tf->hob_lbam,
tf->hob_lbah);
@@ -416,52 +425,89 @@ static int get_burst_length_encode(int datalength)
static void clear_chan_interrupts(int c)
{
- out_le32(&(host_pvt.sata_dma_regs->interrupt_clear.tfr.low),
+ out_le32(&sata_dma_regs->interrupt_clear.tfr.low,
DMA_CHANNEL(c));
- out_le32(&(host_pvt.sata_dma_regs->interrupt_clear.block.low),
+ out_le32(&sata_dma_regs->interrupt_clear.block.low,
DMA_CHANNEL(c));
- out_le32(&(host_pvt.sata_dma_regs->interrupt_clear.srctran.low),
+ out_le32(&sata_dma_regs->interrupt_clear.srctran.low,
DMA_CHANNEL(c));
- out_le32(&(host_pvt.sata_dma_regs->interrupt_clear.dsttran.low),
+ out_le32(&sata_dma_regs->interrupt_clear.dsttran.low,
DMA_CHANNEL(c));
- out_le32(&(host_pvt.sata_dma_regs->interrupt_clear.error.low),
+ out_le32(&sata_dma_regs->interrupt_clear.error.low,
DMA_CHANNEL(c));
}
/*
* Function: dma_request_channel
- * arguments: None
+ * arguments: ap
* returns channel number if available else -1
* This function assigns the next available DMA channel from the list to the
* requester
*/
-static int dma_request_channel(void)
+static int dma_request_channel(struct ata_port *ap)
{
- int i;
+ struct sata_dwc_device *hsdev = HSDEV_FROM_AP(ap);
- for (i = 0; i < DMA_NUM_CHANS; i++) {
- if (!(in_le32(&(host_pvt.sata_dma_regs->dma_chan_en.low)) &\
- DMA_CHANNEL(i)))
- return i;
- }
- dev_err(host_pvt.dwc_dev, "%s NO channel chan_en: 0x%08x\n", __func__,
- in_le32(&(host_pvt.sata_dma_regs->dma_chan_en.low)));
+ /* Check if the channel is not currently in use */
+ if (!(in_le32(&(sata_dma_regs->dma_chan_en.low)) &\
+ DMA_CHANNEL(hsdev->dma_channel)))
+ return hsdev->dma_channel;
+
+ dev_err(ap->dev, "%s Channel %d is currently in use\n", __func__,
+ hsdev->dma_channel);
return -1;
}
/*
+ * Check if the selected DMA channel is currently enabled.
+ */
+static int sata_dwc_dma_chk_en(int ch)
+{
+ u32 dma_chan_reg;
+ /* Read the DMA channel register */
+ dma_chan_reg = in_le32(&(sata_dma_regs->dma_chan_en.low));
+ /* Check if it is currently enabled */
+ if (dma_chan_reg & DMA_CHANNEL(ch))
+ return 1;
+ return 0;
+}
+
+/*
+ * Handle DMA transfer complete interrupt. This checks and passes the
+ * processing to the appropriate ATA port.
+ */
+static irqreturn_t dma_dwc_handler(int irq, void *hsdev_instance)
+{
+ u32 tfr_reg, err_reg;
+ int chan;
+
+ tfr_reg = in_le32(&(sata_dma_regs->interrupt_status.tfr.low));
+ err_reg = in_le32(&(sata_dma_regs->interrupt_status.error.low));
+
+ for (chan = 0; chan < DMA_NUM_CHANS; chan++) {
+ /* Check for end-of-transfer interrupt. */
+ if (tfr_reg & DMA_CHANNEL(chan))
+ dma_dwc_interrupt(0, dwc_dev_list[chan]);
+
+ /* Check for error interrupt. */
+ if (err_reg & DMA_CHANNEL(chan))
+ dma_dwc_interrupt(0, dwc_dev_list[chan]);
+ }
+
+ return IRQ_HANDLED;
+}
+
+/*
* Function: dma_dwc_interrupt
* arguments: irq, dev_id, pt_regs
* returns channel number if available else -1
* Interrupt Handler for DW AHB SATA DMA
*/
-static irqreturn_t dma_dwc_interrupt(int irq, void *hsdev_instance)
+static irqreturn_t dma_dwc_interrupt(int irq, struct sata_dwc_device *hsdev)
{
int chan;
u32 tfr_reg, err_reg;
unsigned long flags;
- struct sata_dwc_device *hsdev =
- (struct sata_dwc_device *)hsdev_instance;
struct ata_host *host = (struct ata_host *)hsdev->host;
struct ata_port *ap;
struct sata_dwc_device_port *hsdevp;
@@ -471,41 +517,25 @@ static irqreturn_t dma_dwc_interrupt(int irq, void *hsdev_instance)
spin_lock_irqsave(&host->lock, flags);
ap = host->ports[port];
hsdevp = HSDEVP_FROM_AP(ap);
- tag = ap->link.active_tag;
- tfr_reg = in_le32(&(host_pvt.sata_dma_regs->interrupt_status.tfr\
+ if (ap->link.active_tag != ATA_TAG_POISON)
+ tag = ap->link.active_tag;
+
+ tfr_reg = in_le32(&(sata_dma_regs->interrupt_status.tfr\
.low));
- err_reg = in_le32(&(host_pvt.sata_dma_regs->interrupt_status.error\
+ err_reg = in_le32(&(sata_dma_regs->interrupt_status.error\
.low));
-
dev_dbg(ap->dev, "eot=0x%08x err=0x%08x pending=%d active port=%d\n",
tfr_reg, err_reg, hsdevp->dma_pending[tag], port);
- for (chan = 0; chan < DMA_NUM_CHANS; chan++) {
- /* Check for end-of-transfer interrupt. */
+ chan = hsdev->dma_channel;
+ if (chan >= 0) {
if (tfr_reg & DMA_CHANNEL(chan)) {
- /*
- * Each DMA command produces 2 interrupts. Only
- * complete the command after both interrupts have been
- * seen. (See sata_dwc_isr())
- */
- host_pvt.dma_interrupt_count++;
+ /* Clear DMA config after transfer complete */
sata_dwc_clear_dmacr(hsdevp, tag);
- if (hsdevp->dma_pending[tag] ==
- SATA_DWC_DMA_PENDING_NONE) {
- dev_err(ap->dev, "DMA not pending eot=0x%08x "
- "err=0x%08x tag=0x%02x pending=%d\n",
- tfr_reg, err_reg, tag,
- hsdevp->dma_pending[tag]);
- }
-
- if ((host_pvt.dma_interrupt_count % 2) == 0)
- sata_dwc_dma_xfer_complete(ap, 1);
-
/* Clear the interrupt */
- out_le32(&(host_pvt.sata_dma_regs->interrupt_clear\
- .tfr.low),
+ out_le32(&(sata_dma_regs->interrupt_clear.tfr.low),
DMA_CHANNEL(chan));
}
@@ -516,11 +546,16 @@ static irqreturn_t dma_dwc_interrupt(int irq, void *hsdev_instance)
err_reg);
/* Clear the interrupt. */
- out_le32(&(host_pvt.sata_dma_regs->interrupt_clear\
+ out_le32(&(sata_dma_regs->interrupt_clear\
.error.low),
DMA_CHANNEL(chan));
}
}
+ hsdevp->dma_pending[tag] = SATA_DWC_DMA_PENDING_NONE;
+
+ if (hsdevp->sactive_queued == 0)
+ ap->link.active_tag = ATA_TAG_POISON;
+
spin_unlock_irqrestore(&host->lock, flags);
return IRQ_HANDLED;
}
@@ -534,21 +569,21 @@ static irqreturn_t dma_dwc_interrupt(int irq, void *hsdev_instance)
static int dma_request_interrupts(struct sata_dwc_device *hsdev, int irq)
{
int retval = 0;
- int chan;
- for (chan = 0; chan < DMA_NUM_CHANS; chan++) {
- /* Unmask error interrupt */
- out_le32(&(host_pvt.sata_dma_regs)->interrupt_mask.error.low,
- DMA_ENABLE_CHAN(chan));
+ /* Unmask error interrupt */
+ out_le32(&sata_dma_regs->interrupt_mask.error.low,
+ in_le32(&sata_dma_regs->interrupt_mask.error.low) |
+ DMA_ENABLE_CHAN(hsdev->dma_channel));
- /* Unmask end-of-transfer interrupt */
- out_le32(&(host_pvt.sata_dma_regs)->interrupt_mask.tfr.low,
- DMA_ENABLE_CHAN(chan));
- }
+ /* Unmask end-of-transfer interrupt */
+ out_le32(&sata_dma_regs->interrupt_mask.tfr.low,
+ in_le32(&sata_dma_regs->interrupt_mask.tfr.low) |
+ DMA_ENABLE_CHAN(hsdev->dma_channel));
- retval = request_irq(irq, dma_dwc_interrupt, 0, "SATA DMA", hsdev);
+ retval = request_irq(irq, dma_dwc_handler, IRQF_SHARED, "SATA DMA",
+ hsdev);
if (retval) {
- dev_err(host_pvt.dwc_dev, "%s: could not get IRQ %d\n",
+ dev_err(hsdev->dev, "%s: could not get IRQ %d\n",\
__func__, irq);
return -ENODEV;
}
@@ -567,16 +602,19 @@ static int dma_request_interrupts(struct sata_dwc_device *hsdev, int irq)
* Currently this function sets interrupts enabled for each linked list item:
* DMA_CTL_INT_EN.
*/
-static int map_sg_to_lli(struct scatterlist *sg, int num_elems,
- struct lli *lli, dma_addr_t dma_lli,
+static int map_sg_to_lli(struct ata_port *ap, struct scatterlist *sg,
+ int num_elems, struct lli *lli, dma_addr_t dma_lli,
void __iomem *dmadr_addr, int dir)
{
+ struct device *dwc_dev = ap->dev;
+ struct sata_dwc_device_port *hsdevp = HSDEVP_FROM_AP(ap);
int i, idx = 0;
int fis_len = 0;
dma_addr_t next_llp;
int bl;
+ u32 sms_val, dms_val;
- dev_dbg(host_pvt.dwc_dev, "%s: sg=%p nelem=%d lli=%p dma_lli=0x%08x"
+ dev_dbg(dwc_dev, "%s: sg=%p nelem=%d lli=%p dma_lli=0x%08x"
" dmadr=0x%08x\n", __func__, sg, num_elems, lli, (u32)dma_lli,
(u32)dmadr_addr);
@@ -589,13 +627,13 @@ static int map_sg_to_lli(struct scatterlist *sg, int num_elems,
addr = (u32) sg_dma_address(sg);
sg_len = sg_dma_len(sg);
- dev_dbg(host_pvt.dwc_dev, "%s: elem=%d sg_addr=0x%x sg_len"
+ dev_dbg(dwc_dev, "%s: elem=%d sg_addr=0x%x sg_len"
"=%d\n", __func__, i, addr, sg_len);
while (sg_len) {
if (idx >= SATA_DWC_DMAC_LLI_NUM) {
/* The LLI table is not large enough. */
- dev_err(host_pvt.dwc_dev, "LLI table overrun "
+ dev_err(dwc_dev, "LLI table overrun "
"(idx=%d)\n", idx);
break;
}
@@ -614,7 +652,7 @@ static int map_sg_to_lli(struct scatterlist *sg, int num_elems,
* the host controller.
*/
if (fis_len + len > 8192) {
- dev_dbg(host_pvt.dwc_dev, "SPLITTING: fis_len="
+ dev_dbg(dwc_dev, "SPLITTING: fis_len="
"%d(0x%x) len=%d(0x%x)\n", fis_len,
fis_len, len, len);
len = 8192 - fis_len;
@@ -629,14 +667,22 @@ static int map_sg_to_lli(struct scatterlist *sg, int num_elems,
* Set DMA addresses and lower half of control register
* based on direction.
*/
+ if (hsdevp->hsdev->hostID == APM_821XX_SATA) {
+ sms_val = 1+hsdevp->hsdev->dma_channel;
+ dms_val = 0;
+ } else {
+ sms_val = 0;
+ dms_val = 1+hsdevp->hsdev->dma_channel;
+ }
+
if (dir == DMA_FROM_DEVICE) {
lli[idx].dar = cpu_to_le32(addr);
lli[idx].sar = cpu_to_le32((u32)dmadr_addr);
lli[idx].ctl.low = cpu_to_le32(
DMA_CTL_TTFC(DMA_CTL_TTFC_P2M_DMAC) |
- DMA_CTL_SMS(0) |
- DMA_CTL_DMS(1) |
+ DMA_CTL_SMS(sms_val) |
+ DMA_CTL_DMS(dms_val) |
DMA_CTL_SRC_MSIZE(bl) |
DMA_CTL_DST_MSIZE(bl) |
DMA_CTL_SINC_NOCHANGE |
@@ -651,8 +697,8 @@ static int map_sg_to_lli(struct scatterlist *sg, int num_elems,
lli[idx].ctl.low = cpu_to_le32(
DMA_CTL_TTFC(DMA_CTL_TTFC_M2P_PER) |
- DMA_CTL_SMS(1) |
- DMA_CTL_DMS(0) |
+ DMA_CTL_SMS(dms_val) |
+ DMA_CTL_DMS(sms_val) |
DMA_CTL_SRC_MSIZE(bl) |
DMA_CTL_DST_MSIZE(bl) |
DMA_CTL_DINC_NOCHANGE |
@@ -663,7 +709,7 @@ static int map_sg_to_lli(struct scatterlist *sg, int num_elems,
DMA_CTL_LLP_DSTEN);
}
- dev_dbg(host_pvt.dwc_dev, "%s setting ctl.high len: "
+ dev_dbg(dwc_dev, "%s setting ctl.high len: "
"0x%08x val: 0x%08x\n", __func__,
len, DMA_CTL_BLK_TS(len / 4));
@@ -678,7 +724,13 @@ static int map_sg_to_lli(struct scatterlist *sg, int num_elems,
lli)));
/* The last 2 bits encode the list master select. */
- next_llp = DMA_LLP_LMS(next_llp, DMA_LLP_AHBMASTER2);
+ if (hsdevp->hsdev->hostID == APM_460EX_SATA) {
+ next_llp = DMA_LLP_LMS(next_llp,
+ DMA_LLP_AHBMASTER2);
+ } else {
+ next_llp = DMA_LLP_LMS(next_llp,
+ DMA_LLP_AHBMASTER1);
+ }
lli[idx].llp = cpu_to_le32(next_llp);
idx++;
@@ -714,70 +766,49 @@ static int map_sg_to_lli(struct scatterlist *sg, int num_elems,
static void dma_dwc_xfer_start(int dma_ch)
{
/* Enable the DMA channel */
- out_le32(&(host_pvt.sata_dma_regs->dma_chan_en.low),
- in_le32(&(host_pvt.sata_dma_regs->dma_chan_en.low)) |
+ out_le32(&(sata_dma_regs->dma_chan_en.low),
+ in_le32(&(sata_dma_regs->dma_chan_en.low)) |
DMA_ENABLE_CHAN(dma_ch));
}
-static int dma_dwc_xfer_setup(struct scatterlist *sg, int num_elems,
- struct lli *lli, dma_addr_t dma_lli,
- void __iomem *addr, int dir)
+
+static int dma_dwc_xfer_setup(struct ata_port *ap, dma_addr_t dma_lli)
{
int dma_ch;
- int num_lli;
+ struct sata_dwc_device *hsdev = HSDEV_FROM_AP(ap);
/* Acquire DMA channel */
- dma_ch = dma_request_channel();
+ dma_ch = dma_request_channel(ap);
if (dma_ch == -1) {
- dev_err(host_pvt.dwc_dev, "%s: dma channel unavailable\n",
- __func__);
+ dev_err(ap->dev, "%s: dma channel unavailable\n", __func__);
return -EAGAIN;
}
- /* Convert SG list to linked list of items (LLIs) for AHB DMA */
- num_lli = map_sg_to_lli(sg, num_elems, lli, dma_lli, addr, dir);
-
- dev_dbg(host_pvt.dwc_dev, "%s sg: 0x%p, count: %d lli: %p dma_lli:"
- " 0x%0xlx addr: %p lli count: %d\n", __func__, sg, num_elems,
- lli, (u32)dma_lli, addr, num_lli);
-
clear_chan_interrupts(dma_ch);
/* Program the CFG register. */
- out_le32(&(host_pvt.sata_dma_regs->chan_regs[dma_ch].cfg.high),
+ out_le32(&(sata_dma_regs->chan_regs[dma_ch].cfg.high),
+ DMA_CFG_HW_HS_SRC(dma_ch) | DMA_CFG_HW_HS_DEST(dma_ch) | \
DMA_CFG_PROTCTL | DMA_CFG_FCMOD_REQ);
- out_le32(&(host_pvt.sata_dma_regs->chan_regs[dma_ch].cfg.low), 0);
+
+ out_le32(&(sata_dma_regs->chan_regs[dma_ch].cfg.low),
+ DMA_CFG_HW_CH_PRIOR(dma_ch));
/* Program the address of the linked list */
- out_le32(&(host_pvt.sata_dma_regs->chan_regs[dma_ch].llp.low),
+ if (hsdev->hostID == APM_460EX_SATA) {
+ out_le32(&(sata_dma_regs->chan_regs[dma_ch].llp.low),
DMA_LLP_LMS(dma_lli, DMA_LLP_AHBMASTER2));
+ } else {
+ out_le32(&(sata_dma_regs->chan_regs[dma_ch].llp.low),
+ DMA_LLP_LMS(dma_lli, DMA_LLP_AHBMASTER1));
+ }
/* Program the CTL register with src enable / dst enable */
- out_le32(&(host_pvt.sata_dma_regs->chan_regs[dma_ch].ctl.low),
+ out_le32(&(sata_dma_regs->chan_regs[dma_ch].ctl.low),
DMA_CTL_LLP_SRCEN | DMA_CTL_LLP_DSTEN);
return dma_ch;
}
/*
- * Function: dma_dwc_exit
- * arguments: None
- * returns status
- * This function exits the SATA DMA driver
- */
-static void dma_dwc_exit(struct sata_dwc_device *hsdev)
-{
- dev_dbg(host_pvt.dwc_dev, "%s:\n", __func__);
- if (host_pvt.sata_dma_regs) {
- iounmap(host_pvt.sata_dma_regs);
- host_pvt.sata_dma_regs = NULL;
- }
-
- if (hsdev->irq_dma) {
- free_irq(hsdev->irq_dma, hsdev);
- hsdev->irq_dma = 0;
- }
-}
-
-/*
* Function: dma_dwc_init
* arguments: hsdev
* returns status
@@ -789,24 +820,18 @@ static int dma_dwc_init(struct sata_dwc_device *hsdev, int irq)
err = dma_request_interrupts(hsdev, irq);
if (err) {
- dev_err(host_pvt.dwc_dev, "%s: dma_request_interrupts returns"
- " %d\n", __func__, err);
- goto error_out;
+ dev_err(hsdev->dev, "%s: dma_request_interrupts returns %d\n",
+ __func__, err);
+ return err;
}
/* Enabe DMA */
- out_le32(&(host_pvt.sata_dma_regs->dma_cfg.low), DMA_EN);
+ out_le32(&(sata_dma_regs->dma_cfg.low), DMA_EN);
- dev_notice(host_pvt.dwc_dev, "DMA initialized\n");
- dev_dbg(host_pvt.dwc_dev, "SATA DMA registers=0x%p\n", host_pvt.\
- sata_dma_regs);
+ dev_notice(hsdev->dev, "DMA initialized\n");
+ dev_dbg(hsdev->dev, "SATA DMA registers=0x%p\n", sata_dma_regs);
return 0;
-
-error_out:
- dma_dwc_exit(hsdev);
-
- return err;
}
static int sata_dwc_scr_read(struct ata_link *link, unsigned int scr, u32 *val)
@@ -818,7 +843,7 @@ static int sata_dwc_scr_read(struct ata_link *link, unsigned int scr, u32 *val)
}
*val = in_le32((void *)link->ap->ioaddr.scr_addr + (scr * 4));
- dev_dbg(link->ap->dev, "%s: id=%d reg=%d val=val=0x%08x\n",
+ dev_dbg(link->ap->dev, "%s: id=%d reg=%d val=0x%08x\n",
__func__, link->ap->print_id, scr, *val);
return 0;
@@ -838,23 +863,27 @@ static int sata_dwc_scr_write(struct ata_link *link, unsigned int scr, u32 val)
return 0;
}
-static u32 core_scr_read(unsigned int scr)
+static u32 core_scr_read(struct ata_port *ap, unsigned int scr)
{
- return in_le32((void __iomem *)(host_pvt.scr_addr_sstatus) +\
- (scr * 4));
+ struct sata_dwc_device *hsdev = HSDEV_FROM_AP(ap);
+
+ return in_le32((void __iomem *)hsdev->scr_base + (scr * 4));
}
-static void core_scr_write(unsigned int scr, u32 val)
+
+static void core_scr_write(struct ata_port *ap, unsigned int scr, u32 val)
{
- out_le32((void __iomem *)(host_pvt.scr_addr_sstatus) + (scr * 4),
- val);
+ struct sata_dwc_device *hsdev = HSDEV_FROM_AP(ap);
+
+ out_le32((void __iomem *)hsdev->scr_base + (scr * 4), val);
}
-static void clear_serror(void)
+static void clear_serror(struct ata_port *ap)
{
- u32 val;
- val = core_scr_read(SCR_ERROR);
- core_scr_write(SCR_ERROR, val);
+ struct sata_dwc_device *hsdev = HSDEV_FROM_AP(ap);
+
+ out_le32((void __iomem *)hsdev->scr_base + 4,
+ in_le32((void __iomem *)hsdev->scr_base + 4));
}
@@ -869,7 +898,6 @@ static u32 qcmd_tag_to_mask(u8 tag)
return 0x00000001 << (tag & 0x1f);
}
-/* See ahci.c */
static void sata_dwc_error_intr(struct ata_port *ap,
struct sata_dwc_device *hsdev, uint intpr)
{
@@ -883,24 +911,23 @@ static void sata_dwc_error_intr(struct ata_port *ap,
ata_ehi_clear_desc(ehi);
- serror = core_scr_read(SCR_ERROR);
+ serror = core_scr_read(ap, SCR_ERROR);
status = ap->ops->sff_check_status(ap);
- err_reg = in_le32(&(host_pvt.sata_dma_regs->interrupt_status.error.\
+ err_reg = in_le32(&(sata_dma_regs->interrupt_status.error.\
low));
tag = ap->link.active_tag;
dev_err(ap->dev, "%s SCR_ERROR=0x%08x intpr=0x%08x status=0x%08x "
- "dma_intp=%d pending=%d issued=%d dma_err_status=0x%08x\n",
- __func__, serror, intpr, status, host_pvt.dma_interrupt_count,
- hsdevp->dma_pending[tag], hsdevp->cmd_issued[tag], err_reg);
+ " pending=%d dma_err_status=0x%08x\n",
+ __func__, serror, intpr, status, hsdevp->dma_pending[tag],
+ err_reg);
/* Clear error register and interrupt bit */
- clear_serror();
+ clear_serror(ap);
clear_interrupt_bit(hsdev, SATA_DWC_INTPR_ERR);
/* This is the only error happening now. TODO check for exact error */
-
err_mask |= AC_ERR_HOST_BUS;
action |= ATA_EH_RESET;
@@ -919,7 +946,7 @@ static void sata_dwc_error_intr(struct ata_port *ap,
/*
* Function : sata_dwc_isr
- * arguments : irq, void *dev_instance, struct pt_regs *regs
+ * arguments : irq, void *dev_instance
* Return value : irqreturn_t - status of IRQ
* This Interrupt handler called via port ops registered function.
* .irq_handler = sata_dwc_isr
@@ -930,14 +957,14 @@ static irqreturn_t sata_dwc_isr(int irq, void *dev_instance)
struct sata_dwc_device *hsdev = HSDEV_FROM_HOST(host);
struct ata_port *ap;
struct ata_queued_cmd *qc;
- unsigned long flags;
u8 status, tag;
- int handled, num_processed, port = 0;
- uint intpr, sactive, sactive2, tag_mask;
+ int handled, port = 0;
+ int num_lli;
+ uint intpr, sactive, tag_mask;
struct sata_dwc_device_port *hsdevp;
- host_pvt.sata_dwc_sactive_issued = 0;
+ u32 mask;
- spin_lock_irqsave(&host->lock, flags);
+ spin_lock(&host->lock);
/* Read the interrupt register */
intpr = in_le32(&hsdev->sata_dwc_regs->intpr);
@@ -960,29 +987,44 @@ static irqreturn_t sata_dwc_isr(int irq, void *dev_instance)
clear_interrupt_bit(hsdev, SATA_DWC_INTPR_NEWFP);
tag = (u8)(in_le32(&hsdev->sata_dwc_regs->fptagr));
+ mask = qcmd_tag_to_mask(tag);
dev_dbg(ap->dev, "%s: NEWFP tag=%d\n", __func__, tag);
- if (hsdevp->cmd_issued[tag] != SATA_DWC_CMD_ISSUED_PEND)
+ if ((hsdevp->sactive_queued & mask) == 0)
dev_warn(ap->dev, "CMD tag=%d not pending?\n", tag);
- host_pvt.sata_dwc_sactive_issued |= qcmd_tag_to_mask(tag);
-
qc = ata_qc_from_tag(ap, tag);
/*
* Start FP DMA for NCQ command. At this point the tag is the
* active tag. It is the tag that matches the command about to
* be completed.
*/
- qc->ap->link.active_tag = tag;
- sata_dwc_bmdma_start_by_tag(qc, tag);
+ if (qc) {
+ hsdevp->sactive_issued |= mask;
+ /* Prevent to issue more commands */
+ qc->ap->link.active_tag = tag;
+ qc->dev->link->sactive |= (1 << qc->tag);
+ num_lli = map_sg_to_lli(ap, qc->sg, qc->n_elem, \
+ hsdevp->llit[tag], hsdevp->llit_dma[tag], \
+ (void *__iomem)(&hsdev->sata_dwc_regs->dmadr), \
+ qc->dma_dir);
+ sata_dwc_bmdma_start_by_tag(qc, tag);
+ wmb();
+ qc->ap->hsm_task_state = HSM_ST_LAST;
+ } else {
+ hsdevp->sactive_issued &= ~mask;
+ dev_warn(ap->dev, "No QC available for tag %d (intpr="
+ "0x%08x, qc_allocated=0x%08x)\n", tag, intpr,
+ ap->qc_allocated);
+ }
handled = 1;
goto DONE;
}
- sactive = core_scr_read(SCR_ACTIVE);
- tag_mask = (host_pvt.sata_dwc_sactive_issued | sactive) ^ sactive;
+ sactive = core_scr_read(ap, SCR_ACTIVE);
+ tag_mask = (hsdevp->sactive_issued | sactive) ^ sactive;
/* If no sactive issued and tag_mask is zero then this is not NCQ */
- if (host_pvt.sata_dwc_sactive_issued == 0 && tag_mask == 0) {
+ if (hsdevp->sactive_issued == 0 && tag_mask == 0) {
if (ap->link.active_tag == ATA_TAG_POISON)
tag = 0;
else
@@ -999,9 +1041,6 @@ static irqreturn_t sata_dwc_isr(int irq, void *dev_instance)
}
status = ap->ops->sff_check_status(ap);
- qc->ap->link.active_tag = tag;
- hsdevp->cmd_issued[tag] = SATA_DWC_CMD_ISSUED_NOT;
-
if (status & ATA_ERR) {
dev_dbg(ap->dev, "interrupt ATA_ERR (0x%x)\n", status);
sata_dwc_qc_complete(ap, qc, 1);
@@ -1012,28 +1051,12 @@ static irqreturn_t sata_dwc_isr(int irq, void *dev_instance)
dev_dbg(ap->dev, "%s non-NCQ cmd interrupt, protocol: %s\n",
__func__, get_prot_descript(qc->tf.protocol));
DRVSTILLBUSY:
+ /* Do complete action for the current QC */
if (ata_is_dma(qc->tf.protocol)) {
- /*
- * Each DMA transaction produces 2 interrupts. The DMAC
- * transfer complete interrupt and the SATA controller
- * operation done interrupt. The command should be
- * completed only after both interrupts are seen.
- */
- host_pvt.dma_interrupt_count++;
- if (hsdevp->dma_pending[tag] == \
- SATA_DWC_DMA_PENDING_NONE) {
- dev_err(ap->dev, "%s: DMA not pending "
- "intpr=0x%08x status=0x%08x pending"
- "=%d\n", __func__, intpr, status,
- hsdevp->dma_pending[tag]);
- }
-
- if ((host_pvt.dma_interrupt_count % 2) == 0)
- sata_dwc_dma_xfer_complete(ap, 1);
- } else if (ata_is_pio(qc->tf.protocol)) {
+ sata_dwc_qc_complete(ap, qc, 1);
+ } else if ((ata_is_pio(qc->tf.protocol)) ||
+ (ata_is_nodata(qc->tf.protocol))) {
ata_sff_hsm_move(ap, qc, status, 0);
- handled = 1;
- goto DONE;
} else {
if (unlikely(sata_dwc_qc_complete(ap, qc, 1)))
goto DRVSTILLBUSY;
@@ -1049,23 +1072,18 @@ DRVSTILLBUSY:
* as completion for more than one operation when commands are queued
* (NCQ). We need to process each completed command.
*/
-
- /* process completed commands */
- sactive = core_scr_read(SCR_ACTIVE);
- tag_mask = (host_pvt.sata_dwc_sactive_issued | sactive) ^ sactive;
-
- if (sactive != 0 || (host_pvt.sata_dwc_sactive_issued) > 1 || \
+ if (sactive != 0 || hsdevp->sactive_issued > 1 || \
tag_mask > 1) {
dev_dbg(ap->dev, "%s NCQ:sactive=0x%08x sactive_issued=0x%08x"
"tag_mask=0x%08x\n", __func__, sactive,
- host_pvt.sata_dwc_sactive_issued, tag_mask);
+ hsdevp->sactive_issued, tag_mask);
}
- if ((tag_mask | (host_pvt.sata_dwc_sactive_issued)) != \
- (host_pvt.sata_dwc_sactive_issued)) {
+ if ((tag_mask | hsdevp->sactive_issued) != \
+ hsdevp->sactive_issued) {
dev_warn(ap->dev, "Bad tag mask? sactive=0x%08x "
- "(host_pvt.sata_dwc_sactive_issued)=0x%08x tag_mask"
- "=0x%08x\n", sactive, host_pvt.sata_dwc_sactive_issued,
+ "sactive_issued=0x%08x tag_mask"
+ "=0x%08x\n", sactive, hsdevp->sactive_issued,
tag_mask);
}
@@ -1073,70 +1091,21 @@ DRVSTILLBUSY:
status = ap->ops->sff_check_status(ap);
dev_dbg(ap->dev, "%s ATA status register=0x%x\n", __func__, status);
- tag = 0;
- num_processed = 0;
- while (tag_mask) {
- num_processed++;
- while (!(tag_mask & 0x00000001)) {
- tag++;
- tag_mask <<= 1;
- }
-
- tag_mask &= (~0x00000001);
- qc = ata_qc_from_tag(ap, tag);
-
- /* To be picked up by completion functions */
- qc->ap->link.active_tag = tag;
- hsdevp->cmd_issued[tag] = SATA_DWC_CMD_ISSUED_NOT;
-
- /* Let libata/scsi layers handle error */
- if (status & ATA_ERR) {
- dev_dbg(ap->dev, "%s ATA_ERR (0x%x)\n", __func__,
- status);
+ for (tag = 0; tag < 32; tag++) {
+ if (tag_mask & qcmd_tag_to_mask(tag)) {
+ qc = ata_qc_from_tag(ap, tag);
+ if (!qc) {
+ dev_info(ap->dev, "error: Tag %d is set but " \
+ "not available\n", tag);
+ continue;
+ }
sata_dwc_qc_complete(ap, qc, 1);
- handled = 1;
- goto DONE;
}
-
- /* Process completed command */
- dev_dbg(ap->dev, "%s NCQ command, protocol: %s\n", __func__,
- get_prot_descript(qc->tf.protocol));
- if (ata_is_dma(qc->tf.protocol)) {
- host_pvt.dma_interrupt_count++;
- if (hsdevp->dma_pending[tag] == \
- SATA_DWC_DMA_PENDING_NONE)
- dev_warn(ap->dev, "%s: DMA not pending?\n",
- __func__);
- if ((host_pvt.dma_interrupt_count % 2) == 0)
- sata_dwc_dma_xfer_complete(ap, 1);
- } else {
- if (unlikely(sata_dwc_qc_complete(ap, qc, 1)))
- goto STILLBUSY;
- }
- continue;
-
-STILLBUSY:
- ap->stats.idle_irq++;
- dev_warn(ap->dev, "STILL BUSY IRQ ata%d: irq trap\n",
- ap->print_id);
- } /* while tag_mask */
-
- /*
- * Check to see if any commands completed while we were processing our
- * initial set of completed commands (read status clears interrupts,
- * so we might miss a completed command interrupt if one came in while
- * we were processing --we read status as part of processing a completed
- * command).
- */
- sactive2 = core_scr_read(SCR_ACTIVE);
- if (sactive2 != sactive) {
- dev_dbg(ap->dev, "More completed - sactive=0x%x sactive2"
- "=0x%x\n", sactive, sactive2);
}
handled = 1;
DONE:
- spin_unlock_irqrestore(&host->lock, flags);
+ spin_unlock(&host->lock);
return IRQ_RETVAL(handled);
}
@@ -1157,7 +1126,7 @@ static void sata_dwc_clear_dmacr(struct sata_dwc_device_port *hsdevp, u8 tag)
* This should not happen, it indicates the driver is out of
* sync. If it does happen, clear dmacr anyway.
*/
- dev_err(host_pvt.dwc_dev, "%s DMA protocol RX and"
+ dev_err(hsdev->dev, "%s DMA protocol RX and"
"TX DMA not pending tag=0x%02x pending=%d"
" dmacr: 0x%08x\n", __func__, tag,
hsdevp->dma_pending[tag],
@@ -1167,44 +1136,6 @@ static void sata_dwc_clear_dmacr(struct sata_dwc_device_port *hsdevp, u8 tag)
}
}
-static void sata_dwc_dma_xfer_complete(struct ata_port *ap, u32 check_status)
-{
- struct ata_queued_cmd *qc;
- struct sata_dwc_device_port *hsdevp = HSDEVP_FROM_AP(ap);
- struct sata_dwc_device *hsdev = HSDEV_FROM_AP(ap);
- u8 tag = 0;
-
- tag = ap->link.active_tag;
- qc = ata_qc_from_tag(ap, tag);
- if (!qc) {
- dev_err(ap->dev, "failed to get qc");
- return;
- }
-
-#ifdef DEBUG_NCQ
- if (tag > 0) {
- dev_info(ap->dev, "%s tag=%u cmd=0x%02x dma dir=%s proto=%s "
- "dmacr=0x%08x\n", __func__, qc->tag, qc->tf.command,
- get_dma_dir_descript(qc->dma_dir),
- get_prot_descript(qc->tf.protocol),
- in_le32(&(hsdev->sata_dwc_regs->dmacr)));
- }
-#endif
-
- if (ata_is_dma(qc->tf.protocol)) {
- if (hsdevp->dma_pending[tag] == SATA_DWC_DMA_PENDING_NONE) {
- dev_err(ap->dev, "%s DMA protocol RX and TX DMA not "
- "pending dmacr: 0x%08x\n", __func__,
- in_le32(&(hsdev->sata_dwc_regs->dmacr)));
- }
-
- hsdevp->dma_pending[tag] = SATA_DWC_DMA_PENDING_NONE;
- sata_dwc_qc_complete(ap, qc, check_status);
- ap->link.active_tag = ATA_TAG_POISON;
- } else {
- sata_dwc_qc_complete(ap, qc, check_status);
- }
-}
static int sata_dwc_qc_complete(struct ata_port *ap, struct ata_queued_cmd *qc,
u32 check_status)
@@ -1213,24 +1144,39 @@ static int sata_dwc_qc_complete(struct ata_port *ap, struct ata_queued_cmd *qc,
u32 mask = 0x0;
u8 tag = qc->tag;
struct sata_dwc_device_port *hsdevp = HSDEVP_FROM_AP(ap);
- host_pvt.sata_dwc_sactive_queued = 0;
+ int i;
+
dev_dbg(ap->dev, "%s checkstatus? %x\n", __func__, check_status);
- if (hsdevp->dma_pending[tag] == SATA_DWC_DMA_PENDING_TX)
- dev_err(ap->dev, "TX DMA PENDING\n");
- else if (hsdevp->dma_pending[tag] == SATA_DWC_DMA_PENDING_RX)
- dev_err(ap->dev, "RX DMA PENDING\n");
+ /* Check main status, clearing INTRQ */
+ status = ap->ops->sff_check_status(ap);
+
+ if (check_status) {
+ /* Make sure SATA port is not in BUSY state */
+ i = 0;
+ while (status & ATA_BUSY) {
+ if (++i > 10)
+ break;
+ status = ap->ops->sff_check_altstatus(ap);
+ };
+
+ if (unlikely(status & ATA_BUSY))
+ dev_err(ap->dev, "QC complete cmd=0x%02x STATUS BUSY "
+ "(0x%02x) [%d]\n", qc->tf.command, status, i);
+ }
dev_dbg(ap->dev, "QC complete cmd=0x%02x status=0x%02x ata%u:"
" protocol=%d\n", qc->tf.command, status, ap->print_id,
qc->tf.protocol);
/* clear active bit */
mask = (~(qcmd_tag_to_mask(tag)));
- host_pvt.sata_dwc_sactive_queued = (host_pvt.sata_dwc_sactive_queued) \
- & mask;
- host_pvt.sata_dwc_sactive_issued = (host_pvt.sata_dwc_sactive_issued) \
- & mask;
+ hsdevp->sactive_issued &= ~mask;
+
ata_qc_complete(qc);
+
+ if (hsdevp->sactive_queued == 0)
+ ap->link.active_tag = ATA_TAG_POISON;
+
return 0;
}
@@ -1248,7 +1194,7 @@ static void sata_dwc_enable_interrupts(struct sata_dwc_device *hsdev)
*/
out_le32(&hsdev->sata_dwc_regs->errmr, SATA_DWC_SERROR_ERR_BITS);
- dev_dbg(host_pvt.dwc_dev, "%s: INTMR = 0x%08x, ERRMR = 0x%08x\n",
+ dev_dbg(hsdev->dev, "%s: INTMR = 0x%08x, ERRMR = 0x%08x\n",
__func__, in_le32(&hsdev->sata_dwc_regs->intmr),
in_le32(&hsdev->sata_dwc_regs->errmr));
}
@@ -1310,9 +1256,6 @@ static int sata_dwc_port_start(struct ata_port *ap)
}
hsdevp->hsdev = hsdev;
- for (i = 0; i < SATA_DWC_QCMD_MAX; i++)
- hsdevp->cmd_issued[i] = SATA_DWC_CMD_ISSUED_NOT;
-
ap->bmdma_prd = 0; /* set these so libata doesn't use them */
ap->bmdma_prd_dma = 0;
@@ -1329,7 +1272,7 @@ static int sata_dwc_port_start(struct ata_port *ap)
dev_err(ap->dev, "%s: dma_alloc_coherent failed\n",
__func__);
err = -ENOMEM;
- goto CLEANUP_ALLOC;
+ goto CLEANUP;
}
}
@@ -1347,15 +1290,16 @@ static int sata_dwc_port_start(struct ata_port *ap)
}
/* Clear any error bits before libata starts issuing commands */
- clear_serror();
+ clear_serror(ap);
ap->private_data = hsdevp;
dev_dbg(ap->dev, "%s: done\n", __func__);
return 0;
-CLEANUP_ALLOC:
- kfree(hsdevp);
CLEANUP:
- dev_dbg(ap->dev, "%s: fail. ap->id = %d\n", __func__, ap->print_id);
+ sata_dwc_port_stop(ap);
+ kfree(hsdevp);
+ dev_dbg(ap->dev, "%s: fail\n", __func__);
+
return err;
}
@@ -1382,14 +1326,14 @@ static void sata_dwc_port_stop(struct ata_port *ap)
/*
* Function : sata_dwc_exec_command_by_tag
- * arguments : ata_port *ap, ata_taskfile *tf, u8 tag, u32 cmd_issued
+ * arguments : ata_port *ap, ata_taskfile *tf, u8 tag
* Return value : None
* This function keeps track of individual command tag ids and calls
* ata_exec_command in libata
*/
static void sata_dwc_exec_command_by_tag(struct ata_port *ap,
struct ata_taskfile *tf,
- u8 tag, u32 cmd_issued)
+ u8 tag)
{
unsigned long flags;
struct sata_dwc_device_port *hsdevp = HSDEVP_FROM_AP(ap);
@@ -1398,7 +1342,7 @@ static void sata_dwc_exec_command_by_tag(struct ata_port *ap,
ata_get_cmd_descript(tf->command), tag);
spin_lock_irqsave(&ap->host->lock, flags);
- hsdevp->cmd_issued[tag] = cmd_issued;
+ hsdevp->sactive_queued |= qcmd_tag_to_mask(tag);
spin_unlock_irqrestore(&ap->host->lock, flags);
/*
* Clear SError before executing a new command.
@@ -1406,15 +1350,10 @@ static void sata_dwc_exec_command_by_tag(struct ata_port *ap,
* managed SError register for the disk needs to be done before the
* task file is loaded.
*/
- clear_serror();
+ clear_serror(ap);
ata_sff_exec_command(ap, tf);
}
-static void sata_dwc_bmdma_setup_by_tag(struct ata_queued_cmd *qc, u8 tag)
-{
- sata_dwc_exec_command_by_tag(qc->ap, &qc->tf, tag,
- SATA_DWC_CMD_ISSUED_PEND);
-}
static void sata_dwc_bmdma_setup(struct ata_queued_cmd *qc)
{
@@ -1426,7 +1365,8 @@ static void sata_dwc_bmdma_setup(struct ata_queued_cmd *qc)
} else {
tag = 0;
}
- sata_dwc_bmdma_setup_by_tag(qc, tag);
+
+ sata_dwc_exec_command_by_tag(qc->ap, &qc->tf, tag);
}
static void sata_dwc_bmdma_start_by_tag(struct ata_queued_cmd *qc, u8 tag)
@@ -1437,28 +1377,37 @@ static void sata_dwc_bmdma_start_by_tag(struct ata_queued_cmd *qc, u8 tag)
struct ata_port *ap = qc->ap;
struct sata_dwc_device_port *hsdevp = HSDEVP_FROM_AP(ap);
int dir = qc->dma_dir;
- dma_chan = hsdevp->dma_chan[tag];
- if (hsdevp->cmd_issued[tag] != SATA_DWC_CMD_ISSUED_NOT) {
+ /* Configure DMA before starting data transfer */
+ dma_chan = dma_dwc_xfer_setup(ap, hsdevp->llit_dma[tag]);
+ if (unlikely(dma_chan < 0)) {
+ dev_err(ap->dev, "%s: dma channel unavailable\n", __func__);
+ /* Offending this QC as no channel available for transfer */
+ qc->err_mask |= AC_ERR_TIMEOUT;
+ return;
+ }
+
+ /* Check if DMA should be started */
+ hsdevp->dma_chan[tag] = dma_chan;
+ if (hsdevp->sactive_queued & qcmd_tag_to_mask(tag)) {
start_dma = 1;
if (dir == DMA_TO_DEVICE)
hsdevp->dma_pending[tag] = SATA_DWC_DMA_PENDING_TX;
else
hsdevp->dma_pending[tag] = SATA_DWC_DMA_PENDING_RX;
} else {
- dev_err(ap->dev, "%s: Command not pending cmd_issued=%d "
- "(tag=%d) DMA NOT started\n", __func__,
- hsdevp->cmd_issued[tag], tag);
+ dev_err(ap->dev, "%s: No pending cmd at tag %d\n",
+ __func__, tag);
start_dma = 0;
}
dev_dbg(ap->dev, "%s qc=%p tag: %x cmd: 0x%02x dma_dir: %s "
"start_dma? %x\n", __func__, qc, tag, qc->tf.command,
get_dma_dir_descript(qc->dma_dir), start_dma);
- sata_dwc_tf_dump(&(qc->tf));
+ sata_dwc_tf_dump(hsdev->dev, &qc->tf);
if (start_dma) {
- reg = core_scr_read(SCR_ERROR);
+ reg = core_scr_read(qc->ap, SCR_ERROR);
if (reg & SATA_DWC_SERROR_ERR_BITS) {
dev_err(ap->dev, "%s: ****** SError=0x%08x ******\n",
__func__, reg);
@@ -1473,6 +1422,7 @@ static void sata_dwc_bmdma_start_by_tag(struct ata_queued_cmd *qc, u8 tag)
/* Enable AHB DMA transfer on the specified channel */
dma_dwc_xfer_start(dma_chan);
+ hsdevp->sactive_queued &= ~qcmd_tag_to_mask(tag);
}
}
@@ -1490,6 +1440,49 @@ static void sata_dwc_bmdma_start(struct ata_queued_cmd *qc)
sata_dwc_bmdma_start_by_tag(qc, tag);
}
+static void sata_dwc_bmdma_stop(struct ata_queued_cmd *qc)
+{
+ struct ata_port *ap = qc->ap;
+ struct sata_dwc_device *hsdev = HSDEV_FROM_AP(ap);
+ int dma_ch, enabled;
+
+ dma_ch = hsdev->dma_channel;
+ enabled = sata_dwc_dma_chk_en(dma_ch);
+
+ if (enabled) {
+ dev_dbg(ap->dev,
+ "%s terminate DMA on channel=%d (mask=0x%08x) ...",
+ __func__, dma_ch, DMA_DISABLE_CHAN(dma_ch));
+ /* Disable the selected channel */
+ out_le32(&(sata_dma_regs->dma_chan_en.low),
+ DMA_DISABLE_CHAN(dma_ch));
+
+ /* Wait for the channel is disabled */
+ do {
+ enabled = sata_dwc_dma_chk_en(dma_ch);
+ ndelay(1000);
+ } while (enabled);
+ dev_dbg(ap->dev, "done\n");
+ }
+}
+
+static u8 sata_dwc_bmdma_status(struct ata_port *ap)
+{
+ u32 status = 0;
+ u32 tfr_reg, err_reg;
+ struct sata_dwc_device *hsdev = HSDEV_FROM_AP(ap);
+
+ /* Check DMA register for status */
+ tfr_reg = in_le32(&(sata_dma_regs->interrupt_status.tfr.low));
+ err_reg = in_le32(&(sata_dma_regs->interrupt_status.error.low));
+
+ if (unlikely(err_reg & DMA_CHANNEL(hsdev->dma_channel)))
+ status = ATA_DMA_ERR;
+ else if (tfr_reg & DMA_CHANNEL(hsdev->dma_channel))
+ status = ATA_DMA_INTR;
+ return status;
+}
+
/*
* Function : sata_dwc_qc_prep_by_tag
* arguments : ata_queued_cmd *qc, u8 tag
@@ -1500,24 +1493,22 @@ static void sata_dwc_qc_prep_by_tag(struct ata_queued_cmd *qc, u8 tag)
{
struct scatterlist *sg = qc->sg;
struct ata_port *ap = qc->ap;
- int dma_chan;
+ int num_lli;
struct sata_dwc_device *hsdev = HSDEV_FROM_AP(ap);
struct sata_dwc_device_port *hsdevp = HSDEVP_FROM_AP(ap);
+ if ((qc->dma_dir == DMA_NONE) || (qc->tf.protocol == ATA_PROT_PIO))
+ return;
dev_dbg(ap->dev, "%s: port=%d dma dir=%s n_elem=%d\n",
__func__, ap->port_no, get_dma_dir_descript(qc->dma_dir),
qc->n_elem);
- dma_chan = dma_dwc_xfer_setup(sg, qc->n_elem, hsdevp->llit[tag],
- hsdevp->llit_dma[tag],
- (void *__iomem)(&hsdev->sata_dwc_regs->\
- dmadr), qc->dma_dir);
- if (dma_chan < 0) {
- dev_err(ap->dev, "%s: dma_dwc_xfer_setup returns err %d\n",
- __func__, dma_chan);
- return;
+ if (!ata_is_ncq(qc->tf.protocol)) {
+ num_lli = map_sg_to_lli(qc->ap, sg, qc->n_elem,
+ hsdevp->llit[tag], hsdevp->llit_dma[tag],
+ (void *__iomem)(&hsdev->sata_dwc_regs->dmadr),
+ qc->dma_dir);
}
- hsdevp->dma_chan[tag] = dma_chan;
}
static unsigned int sata_dwc_qc_issue(struct ata_queued_cmd *qc)
@@ -1541,19 +1532,18 @@ static unsigned int sata_dwc_qc_issue(struct ata_queued_cmd *qc)
sata_dwc_qc_prep_by_tag(qc, tag);
if (ata_is_ncq(qc->tf.protocol)) {
- sactive = core_scr_read(SCR_ACTIVE);
+ /* Update SActive register for new command */
+ sactive = core_scr_read(qc->ap, SCR_ACTIVE);
sactive |= (0x00000001 << tag);
- core_scr_write(SCR_ACTIVE, sactive);
-
- dev_dbg(qc->ap->dev, "%s: tag=%d ap->link.sactive = 0x%08x "
- "sactive=0x%08x\n", __func__, tag, qc->ap->link.sactive,
- sactive);
+ core_scr_write(qc->ap, SCR_ACTIVE, sactive);
+ qc->dev->link->sactive |= 0x00000001 << tag;
ap->ops->sff_tf_load(ap, &qc->tf);
- sata_dwc_exec_command_by_tag(ap, &qc->tf, qc->tag,
- SATA_DWC_CMD_ISSUED_PEND);
+ sata_dwc_exec_command_by_tag(ap, &qc->tf, qc->tag);
} else {
- ata_sff_qc_issue(qc);
+ /* As ata_sff_qc_issue is no longer handle DMA transfer,
+ * change to use ata_bmdma_qc_issue instead */
+ ata_bmdma_qc_issue(qc);
}
return 0;
}
@@ -1582,7 +1572,12 @@ static void sata_dwc_qc_prep(struct ata_queued_cmd *qc)
static void sata_dwc_error_handler(struct ata_port *ap)
{
ap->link.flags |= ATA_LFLAG_NO_HRST;
- ata_sff_error_handler(ap);
+ ata_bmdma_error_handler(ap);
+}
+
+u8 sata_dwc_check_altstatus(struct ata_port *ap)
+{
+ return ioread8(ap->ioaddr.altstatus_addr);
}
/*
@@ -1616,6 +1611,10 @@ static struct ata_port_operations sata_dwc_ops = {
.bmdma_setup = sata_dwc_bmdma_setup,
.bmdma_start = sata_dwc_bmdma_start,
+ .bmdma_stop = sata_dwc_bmdma_stop,
+ .bmdma_status = sata_dwc_bmdma_status,
+
+ .sff_check_altstatus = sata_dwc_check_altstatus,
};
static const struct ata_port_info sata_dwc_port_info[] = {
@@ -1638,13 +1637,38 @@ static int sata_dwc_probe(struct platform_device *ofdev)
struct ata_host *host;
struct ata_port_info pi = sata_dwc_port_info[0];
const struct ata_port_info *ppi[] = { &pi, NULL };
+ const unsigned int *dma_chan;
+
+ /* Check if device is declared in device tree */
+ if (!of_device_is_available(ofdev->dev.of_node)) {
+ printk(KERN_INFO "%s: Port disabled via device-tree\n",
+ ofdev->dev.of_node->full_name);
+ return 0;
+ }
/* Allocate DWC SATA device */
hsdev = kzalloc(sizeof(*hsdev), GFP_KERNEL);
if (hsdev == NULL) {
dev_err(&ofdev->dev, "kmalloc failed for hsdev\n");
err = -ENOMEM;
- goto error;
+ goto error_out_5;
+ }
+
+ /* Identify host controller using compatible attribute */
+ if (of_device_is_compatible(ofdev->dev.of_node, "amcc,sata-apm821xx")) {
+ printk(KERN_INFO "SATA is compatible for sata-821xx\n");
+ hsdev->hostID = APM_821XX_SATA;
+ } else {
+ printk(KERN_INFO "SATA is compatible for sata-460ex\n");
+ hsdev->hostID = APM_460EX_SATA;
+ }
+
+ dma_chan = of_get_property(ofdev->dev.of_node, "dma-channel", NULL);
+ if (dma_chan) {
+ dev_notice(&ofdev->dev, "Getting DMA channel %d\n", *dma_chan);
+ hsdev->dma_channel = *dma_chan;
+ } else {
+ hsdev->dma_channel = 0;
}
/* Ioremap SATA registers */
@@ -1653,7 +1677,7 @@ static int sata_dwc_probe(struct platform_device *ofdev)
dev_err(&ofdev->dev, "ioremap failed for SATA register"
" address\n");
err = -ENODEV;
- goto error_kmalloc;
+ goto error_out_4;
}
hsdev->reg_base = base;
dev_dbg(&ofdev->dev, "ioremap done for SATA register address\n");
@@ -1666,7 +1690,7 @@ static int sata_dwc_probe(struct platform_device *ofdev)
if (!host) {
dev_err(&ofdev->dev, "ata_host_alloc_pinfo failed\n");
err = -ENOMEM;
- goto error_iomap;
+ goto error_out_4;
}
host->private_data = hsdev;
@@ -1674,7 +1698,7 @@ static int sata_dwc_probe(struct platform_device *ofdev)
/* Setup port */
host->ports[0]->ioaddr.cmd_addr = base;
host->ports[0]->ioaddr.scr_addr = base + SATA_DWC_SCR_OFFSET;
- host_pvt.scr_addr_sstatus = base + SATA_DWC_SCR_OFFSET;
+ hsdev->scr_base = (u8 *)(base + SATA_DWC_SCR_OFFSET);
sata_dwc_setup_port(&host->ports[0]->ioaddr, (unsigned long)base);
/* Read the ID and Version Registers */
@@ -1688,23 +1712,30 @@ static int sata_dwc_probe(struct platform_device *ofdev)
if (irq == NO_IRQ) {
dev_err(&ofdev->dev, "no SATA DMA irq\n");
err = -ENODEV;
- goto error_out;
- }
-
- /* Get physical SATA DMA register base address */
- host_pvt.sata_dma_regs = of_iomap(ofdev->dev.of_node, 1);
- if (!(host_pvt.sata_dma_regs)) {
- dev_err(&ofdev->dev, "ioremap failed for AHBDMA register"
- " address\n");
- err = -ENODEV;
- goto error_out;
+ goto error_out_3;
}
/* Save dev for later use in dev_xxx() routines */
- host_pvt.dwc_dev = &ofdev->dev;
+ hsdev->dev = &ofdev->dev;
- /* Initialize AHB DMAC */
- dma_dwc_init(hsdev, irq);
+ /* Init glovbal dev list */
+ dwc_dev_list[hsdev->dma_channel] = hsdev;
+
+ /* Get physical SATA DMA register base address */
+ if (sata_dma_regs == NULL) {
+ sata_dma_regs = of_iomap(ofdev->dev.of_node, 1);
+ if (sata_dma_regs == NULL) {
+ dev_err(&ofdev->dev,
+ "ioremap failed for AHBDMA register address\n");
+ err = -ENODEV;
+ goto error_out_2;
+ }
+
+ /* Initialize AHB DMAC */
+ rc = dma_dwc_init(hsdev, irq);
+ if (rc != 0)
+ goto error_out_1;
+ }
/* Enable SATA Interrupts */
sata_dwc_enable_interrupts(hsdev);
@@ -1714,7 +1745,7 @@ static int sata_dwc_probe(struct platform_device *ofdev)
if (irq == NO_IRQ) {
dev_err(&ofdev->dev, "no SATA DMA irq\n");
err = -ENODEV;
- goto error_out;
+ goto error_out_1;
}
/*
@@ -1730,15 +1761,19 @@ static int sata_dwc_probe(struct platform_device *ofdev)
dev_set_drvdata(&ofdev->dev, host);
return 0;
-error_out:
- /* Free SATA DMA resources */
- dma_dwc_exit(hsdev);
+error_out_1:
+ iounmap(sata_dma_regs);
-error_iomap:
+error_out_2:
+ free_irq(hsdev->irq_dma, hsdev);
+
+error_out_3:
iounmap(base);
-error_kmalloc:
+
+error_out_4:
kfree(hsdev);
-error:
+
+error_out_5:
return err;
}
@@ -1752,8 +1787,10 @@ static int sata_dwc_remove(struct platform_device *ofdev)
dev_set_drvdata(dev, NULL);
/* Free SATA DMA resources */
- dma_dwc_exit(hsdev);
+ iounmap(sata_dma_regs);
+ free_irq(hsdev->irq_dma, hsdev);
+ /* Free internal resources */
iounmap(hsdev->reg_base);
kfree(hsdev);
kfree(host);
@@ -1763,6 +1800,7 @@ static int sata_dwc_remove(struct platform_device *ofdev)
static const struct of_device_id sata_dwc_match[] = {
{ .compatible = "amcc,sata-460ex", },
+ { .compatible = "amcc,sata-apm821xx", },
{}
};
MODULE_DEVICE_TABLE(of, sata_dwc_match);
--
1.7.3.4
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