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Message-Id: <1562010839-1113-7-git-send-email-eajames@linux.ibm.com>
Date: Mon, 1 Jul 2019 14:53:57 -0500
From: Eddie James <eajames@...ux.ibm.com>
To: linux-aspeed@...ts.ozlabs.org
Cc: linux-kernel@...r.kernel.org, arnd@...db.de, robh+dt@...nel.org,
mark.rutland@....com, devicetree@...r.kernel.org, joel@....id.au,
eduval@...zon.com, Eddie James <eajames@...ux.ibm.com>
Subject: [PATCH v4 6/8] drivers/soc: xdma: Add debugfs entries
Add debugfs entries for the relevant XDMA engine registers and for
dumping the AST2500 reserved memory space.
Signed-off-by: Eddie James <eajames@...ux.ibm.com>
---
drivers/soc/aspeed/aspeed-xdma.c | 128 +++++++++++++++++++++++++++++++++++++++
1 file changed, 128 insertions(+)
diff --git a/drivers/soc/aspeed/aspeed-xdma.c b/drivers/soc/aspeed/aspeed-xdma.c
index 72b4c4b..08128ce 100644
--- a/drivers/soc/aspeed/aspeed-xdma.c
+++ b/drivers/soc/aspeed/aspeed-xdma.c
@@ -172,6 +172,12 @@ struct aspeed_xdma {
char pcidev[4];
struct miscdevice misc;
+ struct dentry *debugfs_dir;
+
+#if IS_ENABLED(CONFIG_DEBUG_FS)
+ struct debugfs_regset32 regset;
+ struct debugfs_reg32 regs[XDMA_NUM_DEBUGFS_REGS];
+#endif /* IS_ENABLED(CONFIG_DEBUG_FS) */
};
struct aspeed_xdma_client {
@@ -614,6 +620,126 @@ static int aspeed_xdma_init_mem(struct aspeed_xdma *ctx, u32 conf)
return 0;
}
+static ssize_t aspeed_xdma_debugfs_vga_read(struct file *file,
+ char __user *buf, size_t len,
+ loff_t *offset)
+{
+ int rc = -ENOMEM;
+ struct inode *inode = file_inode(file);
+ struct aspeed_xdma *ctx = inode->i_private;
+ loff_t offs = *offset;
+ void *tmp;
+
+ if (len + offs > ctx->vga_size) {
+ if (offs < ctx->vga_size)
+ len = ctx->vga_size - offs;
+ else
+ return 0;
+ }
+
+ tmp = kzalloc(len, GFP_KERNEL);
+ if (!tmp)
+ return rc;
+
+ memcpy_fromio(tmp, ctx->vga_virt + offs, len);
+
+ rc = copy_to_user(buf, tmp, len);
+ if (rc)
+ goto free;
+
+ *offset = offs + len;
+ rc = len;
+
+free:
+ kfree(tmp);
+
+ return rc;
+}
+
+static const struct file_operations aspeed_xdma_debugfs_vga_fops = {
+ .owner = THIS_MODULE,
+ .llseek = generic_file_llseek,
+ .read = aspeed_xdma_debugfs_vga_read,
+};
+
+static void aspeed_xdma_init_debugfs(struct aspeed_xdma *ctx)
+{
+ if (!IS_ENABLED(CONFIG_DEBUG_FS))
+ return;
+
+ ctx->debugfs_dir = debugfs_create_dir(DEVICE_NAME, NULL);
+ if (IS_ERR(ctx->debugfs_dir)) {
+ dev_warn(ctx->dev, "Failed to create debugfs directory.\n");
+ return;
+ }
+
+ debugfs_create_file("vga", 0444, ctx->debugfs_dir, ctx,
+ &aspeed_xdma_debugfs_vga_fops);
+
+ ctx->regs[0].name = "host_q_addr31";
+ ctx->regs[0].offset = XDMA_HOST_CMD_QUEUE_ADDR0;
+ ctx->regs[1].name = "host_q_addr63";
+ ctx->regs[1].offset = XDMA_HOST_CMD_QUEUE_ADDR1;
+ ctx->regs[2].name = "host_q_endp";
+ ctx->regs[2].offset = XDMA_HOST_CMD_QUEUE_ENDP;
+ ctx->regs[3].name = "host_q_writep";
+ ctx->regs[3].offset = XDMA_HOST_CMD_QUEUE_WRITEP;
+ ctx->regs[4].name = "host_q_readp";
+ ctx->regs[4].offset = XDMA_HOST_CMD_QUEUE_READP;
+ ctx->regs[5].name = "bmc_q_addr";
+ ctx->regs[5].offset = XDMA_BMC_CMD_QUEUE_ADDR;
+ ctx->regs[6].name = "bmc_q_endp";
+ ctx->regs[6].offset = XDMA_BMC_CMD_QUEUE_ENDP;
+ ctx->regs[7].name = "bmc_q_writep";
+ ctx->regs[7].offset = XDMA_BMC_CMD_QUEUE_WRITEP;
+ ctx->regs[8].name = "bmc_q_readp";
+ ctx->regs[8].offset = XDMA_BMC_CMD_QUEUE_READP;
+ ctx->regs[9].name = "control";
+ ctx->regs[9].offset = XDMA_CTRL;
+ ctx->regs[10].name = "status";
+ ctx->regs[10].offset = XDMA_STATUS;
+ ctx->regs[11].name = "ds_frame_size";
+ ctx->regs[11].offset = XDMA_DS_FRAME_SIZE;
+ ctx->regs[12].name = "probe_ds_pcie";
+ ctx->regs[12].offset = XDMA_PROBE_DS_PCIE;
+ ctx->regs[13].name = "probe_us_pcie";
+ ctx->regs[13].offset = XDMA_PROBE_US_PCIE;
+ ctx->regs[14].name = "inprg_ds1";
+ ctx->regs[14].offset = XDMA_INPRG_DS_CMD1;
+ ctx->regs[15].name = "inprg_ds2";
+ ctx->regs[15].offset = XDMA_INPRG_DS_CMD2;
+ ctx->regs[16].name = "inprg_us031";
+ ctx->regs[16].offset = XDMA_INPRG_US_CMD00;
+ ctx->regs[17].name = "inprg_us063";
+ ctx->regs[17].offset = XDMA_INPRG_US_CMD01;
+ ctx->regs[18].name = "inprg_us131";
+ ctx->regs[18].offset = XDMA_INPRG_US_CMD10;
+ ctx->regs[19].name = "inprg_us163";
+ ctx->regs[19].offset = XDMA_INPRG_US_CMD11;
+ ctx->regs[20].name = "inprg_us231";
+ ctx->regs[20].offset = XDMA_INPRG_US_CMD20;
+ ctx->regs[21].name = "inprg_us263";
+ ctx->regs[21].offset = XDMA_INPRG_US_CMD21;
+ ctx->regs[22].name = "vga_q_addr31";
+ ctx->regs[22].offset = XDMA_VGA_CMD_QUEUE_ADDR0;
+ ctx->regs[23].name = "vga_q_addr63";
+ ctx->regs[23].offset = XDMA_VGA_CMD_QUEUE_ADDR1;
+ ctx->regs[24].name = "vga_q_endp";
+ ctx->regs[24].offset = XDMA_VGA_CMD_QUEUE_ENDP;
+ ctx->regs[25].name = "vga_q_writep";
+ ctx->regs[25].offset = XDMA_VGA_CMD_QUEUE_WRITEP;
+ ctx->regs[26].name = "vga_q_readp";
+ ctx->regs[26].offset = XDMA_VGA_CMD_QUEUE_READP;
+ ctx->regs[27].name = "vga_cmd_status";
+ ctx->regs[27].offset = XDMA_VGA_CMD_STATUS;
+
+ ctx->regset.regs = ctx->regs;
+ ctx->regset.nregs = XDMA_NUM_DEBUGFS_REGS;
+ ctx->regset.base = ctx->base;
+
+ debugfs_create_regset32("regs", 0444, ctx->debugfs_dir, &ctx->regset);
+}
+
static int aspeed_xdma_change_pcie_conf(struct aspeed_xdma *ctx, u32 conf)
{
int rc;
@@ -785,6 +911,7 @@ static int aspeed_xdma_probe(struct platform_device *pdev)
}
device_create_file(dev, &dev_attr_pcidev);
+ aspeed_xdma_init_debugfs(ctx);
return 0;
}
@@ -793,6 +920,7 @@ static int aspeed_xdma_remove(struct platform_device *pdev)
{
struct aspeed_xdma *ctx = platform_get_drvdata(pdev);
+ debugfs_remove_recursive(ctx->debugfs_dir);
device_remove_file(ctx->dev, &dev_attr_pcidev);
misc_deregister(&ctx->misc);
--
1.8.3.1
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