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Message-Id: <1599697204-32103-2-git-send-email-amit.sunil.dhamne@xilinx.com>
Date: Wed, 9 Sep 2020 17:20:02 -0700
From: Amit Sunil Dhamne <amit.sunil.dhamne@...inx.com>
To: ard.biesheuvel@...aro.org, mingo@...nel.org,
gregkh@...uxfoundation.org, matt@...eblueprint.co.uk,
sudeep.holla@....com, hkallweit1@...il.com, keescook@...omium.org,
dmitry.torokhov@...il.com, michal.simek@...inx.com,
rajanv@...inx.com, tejas.patel@...inx.com, jollys@...inx.com
Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
rajan.vaja@...inx.com, jolly.shah@...inx.com,
Amit Sunil Dhamne <amit.sunil.dhamne@...inx.com>
Subject: [PATCH 1/3] firmware: xilinx: Add validation check for IOCTL
From: Tejas Patel <tejas.patel@...inx.com>
Validate IOCTL ID for ZynqMP and Versal before calling
zynqmp_pm_invoke_fn().
Signed-off-by: Tejas Patel <tejas.patel@...inx.com>
Signed-off-by: Amit Sunil Dhamne <amit.sunil.dhamne@...inx.com>
---
drivers/firmware/xilinx/zynqmp.c | 117 +++++++++++++++++++++++++++++++--------
1 file changed, 95 insertions(+), 22 deletions(-)
diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index 8d1ff24..8fe0912 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -514,6 +514,89 @@ int zynqmp_pm_clock_getparent(u32 clock_id, u32 *parent_id)
EXPORT_SYMBOL_GPL(zynqmp_pm_clock_getparent);
/**
+ * versal_is_valid_ioctl() - Check whether IOCTL ID is valid or not for versal
+ * @ioctl_id: IOCTL ID
+ *
+ * Return: 1 if IOCTL is valid else 0
+ */
+static inline int versal_is_valid_ioctl(u32 ioctl_id)
+{
+ switch (ioctl_id) {
+ case IOCTL_SD_DLL_RESET:
+ case IOCTL_SET_SD_TAPDELAY:
+ case IOCTL_SET_PLL_FRAC_MODE:
+ case IOCTL_GET_PLL_FRAC_MODE:
+ case IOCTL_SET_PLL_FRAC_DATA:
+ case IOCTL_GET_PLL_FRAC_DATA:
+ case IOCTL_WRITE_GGS:
+ case IOCTL_READ_GGS:
+ case IOCTL_WRITE_PGGS:
+ case IOCTL_READ_PGGS:
+ case IOCTL_SET_BOOT_HEALTH_STATUS:
+ return 1;
+ default:
+ return 0;
+ }
+}
+
+/**
+ * zynqmp_is_valid_ioctl() - Check whether IOCTL ID is valid or not
+ * @ioctl_id: IOCTL ID
+ *
+ * Return: 1 if IOCTL is valid else 0
+ */
+static inline int zynqmp_is_valid_ioctl(u32 ioctl_id)
+{
+ switch (ioctl_id) {
+ case IOCTL_SD_DLL_RESET:
+ case IOCTL_SET_SD_TAPDELAY:
+ case IOCTL_SET_PLL_FRAC_MODE:
+ case IOCTL_GET_PLL_FRAC_MODE:
+ case IOCTL_SET_PLL_FRAC_DATA:
+ case IOCTL_GET_PLL_FRAC_DATA:
+ case IOCTL_WRITE_GGS:
+ case IOCTL_READ_GGS:
+ case IOCTL_WRITE_PGGS:
+ case IOCTL_READ_PGGS:
+ case IOCTL_SET_BOOT_HEALTH_STATUS:
+ return 1;
+ default:
+ return 0;
+ }
+}
+
+/**
+ * zynqmp_pm_ioctl() - PM IOCTL API for device control and configs
+ * @node_id: Node ID of the device
+ * @ioctl_id: ID of the requested IOCTL
+ * @arg1: Argument 1 to requested IOCTL call
+ * @arg2: Argument 2 to requested IOCTL call
+ * @out: Returned output value
+ *
+ * This function calls IOCTL to firmware for device control and configuration.
+ *
+ * Return: Returns status, either success or error+reason
+ */
+static int zynqmp_pm_ioctl(u32 node_id, u32 ioctl_id, u32 arg1, u32 arg2,
+ u32 *out)
+{
+ struct device_node *np;
+
+ np = of_find_compatible_node(NULL, NULL, "xlnx,versal");
+ if (np) {
+ if (!versal_is_valid_ioctl(ioctl_id))
+ return -EINVAL;
+ } else {
+ if (!zynqmp_is_valid_ioctl(ioctl_id))
+ return -EINVAL;
+ }
+ of_node_put(np);
+
+ return zynqmp_pm_invoke_fn(PM_IOCTL, node_id, ioctl_id, arg1, arg2,
+ out);
+}
+
+/**
* zynqmp_pm_set_pll_frac_mode() - PM API for set PLL mode
*
* @clk_id: PLL clock ID
@@ -525,8 +608,7 @@ EXPORT_SYMBOL_GPL(zynqmp_pm_clock_getparent);
*/
int zynqmp_pm_set_pll_frac_mode(u32 clk_id, u32 mode)
{
- return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_SET_PLL_FRAC_MODE,
- clk_id, mode, NULL);
+ return zynqmp_pm_ioctl(0, IOCTL_SET_PLL_FRAC_MODE, clk_id, mode, NULL);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_set_pll_frac_mode);
@@ -542,8 +624,7 @@ EXPORT_SYMBOL_GPL(zynqmp_pm_set_pll_frac_mode);
*/
int zynqmp_pm_get_pll_frac_mode(u32 clk_id, u32 *mode)
{
- return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_GET_PLL_FRAC_MODE,
- clk_id, 0, mode);
+ return zynqmp_pm_ioctl(0, IOCTL_GET_PLL_FRAC_MODE, clk_id, 0, mode);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_get_pll_frac_mode);
@@ -560,8 +641,7 @@ EXPORT_SYMBOL_GPL(zynqmp_pm_get_pll_frac_mode);
*/
int zynqmp_pm_set_pll_frac_data(u32 clk_id, u32 data)
{
- return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_SET_PLL_FRAC_DATA,
- clk_id, data, NULL);
+ return zynqmp_pm_ioctl(0, IOCTL_SET_PLL_FRAC_DATA, clk_id, data, NULL);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_set_pll_frac_data);
@@ -577,8 +657,7 @@ EXPORT_SYMBOL_GPL(zynqmp_pm_set_pll_frac_data);
*/
int zynqmp_pm_get_pll_frac_data(u32 clk_id, u32 *data)
{
- return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_GET_PLL_FRAC_DATA,
- clk_id, 0, data);
+ return zynqmp_pm_ioctl(0, IOCTL_GET_PLL_FRAC_DATA, clk_id, 0, data);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_get_pll_frac_data);
@@ -595,8 +674,8 @@ EXPORT_SYMBOL_GPL(zynqmp_pm_get_pll_frac_data);
*/
int zynqmp_pm_set_sd_tapdelay(u32 node_id, u32 type, u32 value)
{
- return zynqmp_pm_invoke_fn(PM_IOCTL, node_id, IOCTL_SET_SD_TAPDELAY,
- type, value, NULL);
+ return zynqmp_pm_ioctl(node_id, IOCTL_SET_SD_TAPDELAY, type, value,
+ NULL);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_set_sd_tapdelay);
@@ -612,8 +691,7 @@ EXPORT_SYMBOL_GPL(zynqmp_pm_set_sd_tapdelay);
*/
int zynqmp_pm_sd_dll_reset(u32 node_id, u32 type)
{
- return zynqmp_pm_invoke_fn(PM_IOCTL, node_id, IOCTL_SET_SD_TAPDELAY,
- type, 0, NULL);
+ return zynqmp_pm_ioctl(node_id, IOCTL_SET_SD_TAPDELAY, type, 0, NULL);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_sd_dll_reset);
@@ -628,8 +706,7 @@ EXPORT_SYMBOL_GPL(zynqmp_pm_sd_dll_reset);
*/
int zynqmp_pm_write_ggs(u32 index, u32 value)
{
- return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_WRITE_GGS,
- index, value, NULL);
+ return zynqmp_pm_ioctl(0, IOCTL_WRITE_GGS, index, value, NULL);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_write_ggs);
@@ -644,8 +721,7 @@ EXPORT_SYMBOL_GPL(zynqmp_pm_write_ggs);
*/
int zynqmp_pm_read_ggs(u32 index, u32 *value)
{
- return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_READ_GGS,
- index, 0, value);
+ return zynqmp_pm_ioctl(0, IOCTL_READ_GGS, index, 0, value);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_read_ggs);
@@ -661,8 +737,7 @@ EXPORT_SYMBOL_GPL(zynqmp_pm_read_ggs);
*/
int zynqmp_pm_write_pggs(u32 index, u32 value)
{
- return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_WRITE_PGGS, index, value,
- NULL);
+ return zynqmp_pm_ioctl(0, IOCTL_WRITE_PGGS, index, value, NULL);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_write_pggs);
@@ -678,8 +753,7 @@ EXPORT_SYMBOL_GPL(zynqmp_pm_write_pggs);
*/
int zynqmp_pm_read_pggs(u32 index, u32 *value)
{
- return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_READ_PGGS, index, 0,
- value);
+ return zynqmp_pm_ioctl(0, IOCTL_READ_PGGS, index, 0, value);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_read_pggs);
@@ -694,8 +768,7 @@ EXPORT_SYMBOL_GPL(zynqmp_pm_read_pggs);
*/
int zynqmp_pm_set_boot_health_status(u32 value)
{
- return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_SET_BOOT_HEALTH_STATUS,
- value, 0, NULL);
+ return zynqmp_pm_ioctl(0, IOCTL_SET_BOOT_HEALTH_STATUS, value, 0, NULL);
}
/**
--
2.7.4
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